US20110126961A1 - Passive buffer brush air cooling - Google Patents

Passive buffer brush air cooling Download PDF

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Publication number
US20110126961A1
US20110126961A1 US12/629,486 US62948609A US2011126961A1 US 20110126961 A1 US20110126961 A1 US 20110126961A1 US 62948609 A US62948609 A US 62948609A US 2011126961 A1 US2011126961 A1 US 2011126961A1
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US
United States
Prior art keywords
brush
core
buffer
vents
tire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/629,486
Inventor
Troy Allen Kost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Bandag LLC
Original Assignee
Bridgestone Bandag LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Bandag LLC filed Critical Bridgestone Bandag LLC
Priority to US12/629,486 priority Critical patent/US20110126961A1/en
Assigned to BRIDGESTONE BANDAG, LLC reassignment BRIDGESTONE BANDAG, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOST, TROY ALLEN
Priority to CN2010800545041A priority patent/CN102712152A/en
Priority to CA2780123A priority patent/CA2780123A1/en
Priority to BR112012012790A priority patent/BR112012012790A2/en
Priority to AU2010326326A priority patent/AU2010326326B2/en
Priority to JP2012542031A priority patent/JP5567681B2/en
Priority to EP10834921.8A priority patent/EP2507044B1/en
Priority to MX2012005158A priority patent/MX2012005158A/en
Priority to EP16193644.8A priority patent/EP3141344A1/en
Priority to PCT/US2010/055840 priority patent/WO2011068635A2/en
Publication of US20110126961A1 publication Critical patent/US20110126961A1/en
Priority to US13/788,915 priority patent/US9227287B2/en
Priority to JP2014125305A priority patent/JP6023124B2/en
Priority to AU2015200835A priority patent/AU2015200835B2/en
Priority to US14/948,659 priority patent/US10493586B2/en
Abandoned legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • AHUMAN NECESSITIES
    • A46BRUSHWARE
    • A46BBRUSHES
    • A46B13/00Brushes with driven brush bodies or carriers
    • A46B13/001Cylindrical or annular brush bodies
    • A46B13/003Cylindrical or annular brush bodies made up of a series of annular brush rings; Annular brush rings therefor
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02Floor surfacing or polishing machines
    • A47L11/10Floor surfacing or polishing machines motor-driven
    • A47L11/14Floor surfacing or polishing machines motor-driven with rotating tools
    • A47L11/18Floor surfacing or polishing machines motor-driven with rotating tools the tools being roll brushes
    • A47L11/19Parts or details of the brushing tools
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036Parts or details of the surface treating tools
    • A47L11/4041Roll shaped surface treating tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/005Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36Single-purpose machines or devices
    • B24B5/366Single-purpose machines or devices for grinding tyres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06Dust extraction equipment on grinding or polishing machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/10Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/18Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/54Retreading
    • B29D30/56Retreading with prevulcanised tread
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/54Retreading
    • B29D2030/541Abrading the tyre, e.g. buffing, to remove tread and/or sidewalls rubber, to prepare it for retreading

Definitions

  • Buffer brushes are used in a variety of applications. For example, buffer brushes are used for removing the tread of worn tires. Tire buffing is part of the tire retreading operation. However, buffer brushes used in the process of removing the tread of worn tires often wear out and must be replaced frequently. Buffer brushes are also used to add texture to the surface of a newly manufactured tread.
  • the tire casing selected for retreading is buffed to remove excess rubber to provide a substantially evenly textured crown for receiving a tread strip and to provide a predetermined tire casing profile.
  • the casing Prior to retreading, the casing must be buffed, generally to a predetermined characteristic crown radius corresponding to the upper contour of the belt package.
  • the casing is buffed to leave only a predetermined thickness of material remaining over the top belt.
  • the shoulder of the casing is also buffed to eliminate or reduce voids or patterns in the shoulder created by the original tread, and to provide a relatively straight profile between the casing side walls and the crown.
  • a worn casing from each of the various models and sizes of new tires has a characteristic tire casing profile of a particular crown width, crown buffing radius and should trim angle which must be created as an initial step in the buffing process.
  • the tire casing is buffed to remove tread material and to achieve a desired surface texture.
  • the surface texture can be measured on a visual scale propounded by the Rubber Manufacturer's Association (RMA) with a numerical value between 1 and 6 with 1 being the finest and 6 being the roughest texture.
  • RMA Rubber Manufacturer's Association
  • the shoulders of the tire casing typically are subjected to the largest stresses encountered by the tire during service. The finer texture on the shoulders promotes better adhesion of the tire tread to the casing at these high stresses. If the shoulders received too much texturing, crack propagation in these areas is more likely. In instances where the shoulder receives too little texturing, the bond between the tire casing and the tread is poorer.
  • the present invention provides a buffer brush.
  • the buffer brush contains a core having a first side and a second side and the brush extends radially from the surface of the core.
  • the first and second sides have at least one opening configured to allow air to flow laterally through the core. Vents on the surface of the core are configured to allow air flowing laterally through the core to also flow radially through the vents into the brush.
  • a buffer brush having a first end plate with a plurality of openings and a second end plate with a plurality of openings.
  • At least one brush segment comprises a core having openings configured for lateral air flow and vents configured for radial air flow and brush bristles extending radially from the core.
  • the brush segment is mounted between the first end plate and the second end plate and configured such that air can flow through the openings in the first end plate and the second end plate and through the openings configured for lateral air flow and vents configured for radial air flow.
  • a buffer brush is provided.
  • the brush contains a core having a first side and a second side and the brush extends radially from the surface of the core.
  • the first and second sides have at least one opening configured to allow air to flow laterally through the core. Vents on the surface of the core are configured to allow air flowing laterally through the core to also flow radially through the vents into the brush.
  • the brush is rotated such that air flows laterally through the core and radially through the vents.
  • FIG. 1 illustrates one embodiment of a brush assembly including end plates having vent openings
  • FIG. 2 illustrates one embodiment of a brush segment that may be used to construct the brush assembly illustrated in FIG. 1 ;
  • FIG. 3 illustrates one embodiment of air flow through the brush segment illustrated in FIG. 2 ;
  • FIG. 4 illustrates multiple brush segments and endplates forming the brush assembly.
  • a buffer brush is provided.
  • the buffer brush is used in a tire buffing apparatus.
  • the buffer brush may be used in a variety of applications and is not limited to tire buffing.
  • FIG. 1 an illustrative embodiment of a brush assembly 100 including end plates 102 having openings 104 is shown in FIG. 1 .
  • an axel 106 traverses the brush assembly 100 laterally through the brush assembly's core 108 .
  • the brush assembly 100 includes brush bristles 110 extending radially from the core 108 .
  • the rotation of the brush assembly 100 acts as a centrifugal pump. Air is pulled through the openings 104 in the endplate 102 .
  • the air traverses the brush laterally through the core 108 and vents through the brush bristles 110 .
  • the brush bristles 110 may become warmer than the ambient temperature.
  • the air venting through the brush bristles 110 cools the bristles and may extend the brush life.
  • the brush assembly 100 may be constructed using one or more brush segments.
  • FIG. 2 illustrates one embodiment of a brush segment 112 that may be used to construct the brush assembly 100 illustrated in FIG. 1 .
  • FIG. 2 shows only a portion of the brush segment 112 .
  • the brush segment 112 includes brush bristles 114 .
  • the core 116 may be constructed from metal, plastic or other suitable material for supporting the brush bristles 114 . Openings 118 in the core 116 allow air to traverse laterally through the assembled buffer brush assembly 100 ( FIG. 1 ). Vents 120 allow air traversing laterally though the core to escape radially through the brush bristles 114 .
  • FIG. 3 illustrates one embodiment of air flow through the brush segment illustrated in FIG. 2 .
  • the brush assembly rotates, centrifugal forces pump air through the openings 118 in the core 116 .
  • the air escapes from the core 116 through vents 120 .
  • One illustrative example of air flow through a vent 122 and the brush bristles 114 is shown.
  • Pumping air through the openings 118 in the core 116 and through the vents 120 collects any dust that is generated during buffing. For example, buffing the tread from a tire may result in small rubber particles or dust.
  • Air flowing through the brush bristles 114 helps force the dust out of the brush.
  • the brush bristles 114 may have larger openings or cuts to allow additional air flow from the vents 120 .
  • FIG. 4 is a cross sectional view of multiple brush segments and endplates forming the brush assembly 100 illustrated in FIG. 1 .
  • an axel 124 traverses the brush assembly 100 laterally through the brush assembly's core 126 .
  • End plates 128 contain openings 130 , allowing air to enter the brush assembly's core 126 .
  • the brush assembly 100 is formed from a plurality of brush segments 132 .
  • the brush segments include brush bristles 136 and a brush segment core 138 .
  • the brush segment cores 138 contain holes (not shown) that allow air to traverse the brush assembly core laterally and vents (not shown) that allow air to vent radially through the brush segment bristles 136 .
  • the brush When spinning, the brush acts as a centrifugal pump, pulling air through the end plate 128 openings 130 .
  • the air traverses the brush assembly's core 126 through openings in the brush segment 132 core 138 .
  • the air is vented through the brush bristles 136 through vents in the brush segment 132 core 138 .
  • Pumping air through the brush bristles cools the bristles, thus extending the brush life. Additionally, dust and other particles are removed from the bristles 136 and can be collected.
  • the buffer brush can be used in a tire buffing apparatus for buffing a tire casing as part of a retread operation.
  • the tire buffing apparatus can include a base assembly, a rasp pedestal, a moving assembly, a tire hub assembly, an operator station associated with a control unit, an electrical enclosure, and a pneumatic enclosure.
  • the rasp pedestal can include a rasp head and a texturing device, such as the buffer brush, mounted to a single shaft for rotation thereabout.
  • the rasp pedestal can rotate about a vertical axis.
  • the moving assembly can be mounted to the base assembly and connected to the rasp pedestal for selectively moving the rasp pedestal along a pair of perpendicular horizontal X and Y axes.
  • the tire hub assembly can be included for rotating the tire casing.
  • the tire buffer can be operated at the operator station by interfacing with the control unit, which can be housed in the electrical enclosure.
  • the tire buffer can include a tire location mechanism mounted to the rasp pedestal for detecting a tire casing mounted to the tire hub assembly when the rasp pedestal is within a predetermined distance of the tire casing.
  • a tire measurement mechanism can be mounted to the pedestal for measuring the size of the tire casing mounted to the hub assembly.
  • the tire buffer can automatically buff a tire casing to achieve a predetermined tire casing profile and impart a texture thereto.
  • the control unit can be associated with a current sensor which senses the current draw of a rasp drive motor for rotating the rasp head and the texturing device. During the buffing sequence, the control unit can compare the actual current draw of the rasp drive motor to a predetermined target current draw and adjust an operating characteristic of the tire buffer, such as the traverse speed of the rasp pedestal across the width of the tire casing being buffed, in response to any difference therebetween to urge the actual current draw toward the target current draw.
  • the operating parameter monitored and/or the operating characteristic that is changed to change the monitored operating parameter can be varied.
  • the tire buffer can automatically impart a predetermined shoulder texture upon shoulders of the tire casing being buffed with the texturing device.
  • the tire buffing apparatus is fully detailed in U.S. Pat. No. 6,745,809 to Mory et al. which is assigned to Bandag Licensing Corp.
  • the buffer brush can be used as part of a process to add texture to newly manufactured tread.
  • tread is molded into flat 35 foot long sections. These sections have a smooth surface. The tread sections are processed through a series of buffers to remove the smooth surface and texturize the surface of the tread.

Abstract

In one embodiment, the present invention provides a buffer brush. When rotating, the buffer brush acts as a centrifugal pump. The buffer brush contains a core having a first side and a second side and the brush extends racially from the surface of the core. The first and second sides have at least one opening configured to allow air to flow laterally through the core. Vents on the surface of the cure are configured to allow air flowing laterally through the core to also flow radially through the vents into the brush.

Description

    BACKGROUND OF THE INVENTION
  • Buffer brushes are used in a variety of applications. For example, buffer brushes are used for removing the tread of worn tires. Tire buffing is part of the tire retreading operation. However, buffer brushes used in the process of removing the tread of worn tires often wear out and must be replaced frequently. Buffer brushes are also used to add texture to the surface of a newly manufactured tread.
  • Typically the tire casing selected for retreading is buffed to remove excess rubber to provide a substantially evenly textured crown for receiving a tread strip and to provide a predetermined tire casing profile. Prior to retreading, the casing must be buffed, generally to a predetermined characteristic crown radius corresponding to the upper contour of the belt package. The casing is buffed to leave only a predetermined thickness of material remaining over the top belt. The shoulder of the casing is also buffed to eliminate or reduce voids or patterns in the shoulder created by the original tread, and to provide a relatively straight profile between the casing side walls and the crown. A worn casing from each of the various models and sizes of new tires has a characteristic tire casing profile of a particular crown width, crown buffing radius and should trim angle which must be created as an initial step in the buffing process.
  • In present retreading processes, it is important that the surface of the tire casing be carefully buffed about the shoulder areas of the tire to ensure that the tread layer width is approximately the same as the buffed surface of the casing. If the shoulder areas are not sufficiently buffed and trimmed, the tread edges may come loose and/or the cushion gum extending beyond the tread edges will not bond to the casing shoulder. Such problems can reduce the longevity of the retreaded tire and adversely impact the appearance of the retreaded tire.
  • The tire casing is buffed to remove tread material and to achieve a desired surface texture. Typically, it is desired for the crown and the shoulders of the tire casing to have different textures. The surface texture can be measured on a visual scale propounded by the Rubber Manufacturer's Association (RMA) with a numerical value between 1 and 6 with 1 being the finest and 6 being the roughest texture. Typically, it is desired for the crown of the tire casing to have a RMA number of between 3 and 4 and for the shoulder to have an RMA number of about 2. The shoulders of the tire casing typically are subjected to the largest stresses encountered by the tire during service. The finer texture on the shoulders promotes better adhesion of the tire tread to the casing at these high stresses. If the shoulders received too much texturing, crack propagation in these areas is more likely. In instances where the shoulder receives too little texturing, the bond between the tire casing and the tread is poorer.
  • The current state of the art in tire casing buffing allows for a multiplicity of tread removal passes, substantially in a sideways, pass after pass method. U.S. Pat. No. 6,745,809 to Mory et al. and assigned to Bandag Licensing Corp. describes a tire buffing apparatus and is incorporated herein in its entirety for everything that it teaches.
  • BRIEF SUMMARY OF THE INVENTION
  • In one aspect, the present invention provides a buffer brush. The buffer brush contains a core having a first side and a second side and the brush extends radially from the surface of the core. The first and second sides have at least one opening configured to allow air to flow laterally through the core. Vents on the surface of the core are configured to allow air flowing laterally through the core to also flow radially through the vents into the brush.
  • In another aspect, a buffer brush is provided having a first end plate with a plurality of openings and a second end plate with a plurality of openings. At least one brush segment comprises a core having openings configured for lateral air flow and vents configured for radial air flow and brush bristles extending radially from the core. The brush segment is mounted between the first end plate and the second end plate and configured such that air can flow through the openings in the first end plate and the second end plate and through the openings configured for lateral air flow and vents configured for radial air flow.
  • Another aspect of the invention provides a method of buffing. A buffer brush is provided. The brush contains a core having a first side and a second side and the brush extends radially from the surface of the core. The first and second sides have at least one opening configured to allow air to flow laterally through the core. Vents on the surface of the core are configured to allow air flowing laterally through the core to also flow radially through the vents into the brush. The brush is rotated such that air flows laterally through the core and radially through the vents.
  • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)
  • FIG. 1 illustrates one embodiment of a brush assembly including end plates having vent openings;
  • FIG. 2 illustrates one embodiment of a brush segment that may be used to construct the brush assembly illustrated in FIG. 1;
  • FIG. 3 illustrates one embodiment of air flow through the brush segment illustrated in FIG. 2;
  • FIG. 4 illustrates multiple brush segments and endplates forming the brush assembly.
  • DETAILED DESCRIPTION OF THE INVENTION
  • In accordance with the teachings of the present invention, a buffer brush is provided. In one embodiment, the buffer brush is used in a tire buffing apparatus. However, the buffer brush may be used in a variety of applications and is not limited to tire buffing.
  • Turning now to the figures, an illustrative embodiment of a brush assembly 100 including end plates 102 having openings 104 is shown in FIG. 1. In the illustrated embodiment, an axel 106 traverses the brush assembly 100 laterally through the brush assembly's core 108. In one embodiment, the brush assembly 100 includes brush bristles 110 extending radially from the core 108. The rotation of the brush assembly 100 acts as a centrifugal pump. Air is pulled through the openings 104 in the endplate 102. The air traverses the brush laterally through the core 108 and vents through the brush bristles 110. During a buffing operation, the brush bristles 110 may become warmer than the ambient temperature. The air venting through the brush bristles 110 cools the bristles and may extend the brush life.
  • The brush assembly 100 may be constructed using one or more brush segments. FIG. 2 illustrates one embodiment of a brush segment 112 that may be used to construct the brush assembly 100 illustrated in FIG. 1. FIG. 2 shows only a portion of the brush segment 112. In one embodiment, the brush segment 112 includes brush bristles 114. The core 116 may be constructed from metal, plastic or other suitable material for supporting the brush bristles 114. Openings 118 in the core 116 allow air to traverse laterally through the assembled buffer brush assembly 100 (FIG. 1). Vents 120 allow air traversing laterally though the core to escape radially through the brush bristles 114.
  • FIG. 3 illustrates one embodiment of air flow through the brush segment illustrated in FIG. 2. As the brush assembly rotates, centrifugal forces pump air through the openings 118 in the core 116. The air escapes from the core 116 through vents 120. One illustrative example of air flow through a vent 122 and the brush bristles 114 is shown. Pumping air through the openings 118 in the core 116 and through the vents 120 collects any dust that is generated during buffing. For example, buffing the tread from a tire may result in small rubber particles or dust. Air flowing through the brush bristles 114 helps force the dust out of the brush. In an alternative embodiment, the brush bristles 114 may have larger openings or cuts to allow additional air flow from the vents 120.
  • FIG. 4 is a cross sectional view of multiple brush segments and endplates forming the brush assembly 100 illustrated in FIG. 1. In this embodiment, an axel 124 traverses the brush assembly 100 laterally through the brush assembly's core 126. End plates 128 contain openings 130, allowing air to enter the brush assembly's core 126. In this embodiment, the brush assembly 100 is formed from a plurality of brush segments 132. The brush segments include brush bristles 136 and a brush segment core 138. The brush segment cores 138 contain holes (not shown) that allow air to traverse the brush assembly core laterally and vents (not shown) that allow air to vent radially through the brush segment bristles 136. When spinning, the brush acts as a centrifugal pump, pulling air through the end plate 128 openings 130. The air traverses the brush assembly's core 126 through openings in the brush segment 132 core 138. The air is vented through the brush bristles 136 through vents in the brush segment 132 core 138. Pumping air through the brush bristles cools the bristles, thus extending the brush life. Additionally, dust and other particles are removed from the bristles 136 and can be collected.
  • As one example application, the buffer brush can be used in a tire buffing apparatus for buffing a tire casing as part of a retread operation. The tire buffing apparatus can include a base assembly, a rasp pedestal, a moving assembly, a tire hub assembly, an operator station associated with a control unit, an electrical enclosure, and a pneumatic enclosure. The rasp pedestal can include a rasp head and a texturing device, such as the buffer brush, mounted to a single shaft for rotation thereabout. The rasp pedestal can rotate about a vertical axis. The moving assembly can be mounted to the base assembly and connected to the rasp pedestal for selectively moving the rasp pedestal along a pair of perpendicular horizontal X and Y axes. The tire hub assembly can be included for rotating the tire casing. The tire buffer can be operated at the operator station by interfacing with the control unit, which can be housed in the electrical enclosure. The tire buffer can include a tire location mechanism mounted to the rasp pedestal for detecting a tire casing mounted to the tire hub assembly when the rasp pedestal is within a predetermined distance of the tire casing. A tire measurement mechanism can be mounted to the pedestal for measuring the size of the tire casing mounted to the hub assembly.
  • The tire buffer can automatically buff a tire casing to achieve a predetermined tire casing profile and impart a texture thereto. The control unit can be associated with a current sensor which senses the current draw of a rasp drive motor for rotating the rasp head and the texturing device. During the buffing sequence, the control unit can compare the actual current draw of the rasp drive motor to a predetermined target current draw and adjust an operating characteristic of the tire buffer, such as the traverse speed of the rasp pedestal across the width of the tire casing being buffed, in response to any difference therebetween to urge the actual current draw toward the target current draw. In other embodiments, the operating parameter monitored and/or the operating characteristic that is changed to change the monitored operating parameter can be varied.
  • The tire buffer can automatically impart a predetermined shoulder texture upon shoulders of the tire casing being buffed with the texturing device. The tire buffing apparatus is fully detailed in U.S. Pat. No. 6,745,809 to Mory et al. which is assigned to Bandag Licensing Corp.
  • In a second exemplary application, the buffer brush can be used as part of a process to add texture to newly manufactured tread. In one embodiment, tread is molded into flat 35 foot long sections. These sections have a smooth surface. The tread sections are processed through a series of buffers to remove the smooth surface and texturize the surface of the tread.
  • The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms “comprising,” “having,” “including,” and “containing” are to be construed as open-ended terms (i.e., meaning “including, but not limited to,”) unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
  • Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.

Claims (20)

1. A buffer brush comprising:
a core having a first side and a second side, wherein a brush extends radially from the surface of the core;
at least one opening in the first side and at least one opening in the second side, wherein the opening in the first side and the opening in the second side are configured to allow air to flow laterally through the core;
a plurality of vents on the surface of the core configured to allow air flowing laterally through the core to also flow radially through the vents and into the brush.
2. The buffer brush according to claim 1 wherein the core comprises a plurality of brush segments.
3. The buffer brush according to claim 1 wherein a first endplate forms the first side.
4. The buffer brush according to claim 3 wherein a second endplate forms the second side.
5. The buffer brush of according to claim 1 where the brush contains gaps configured to facilitate air flow through the brush.
6. The buffer brush according to claim 1 further comprising a vacuum pump adjacent to the brush, wherein the vacuum pump collects dust from an object being buffed.
7. The buffer brush according to claim 1 wherein the brush is a wire brush.
8. The buffer brush according to claim 1 further comprising an axel supporting the core.
9. A method for manufacturing a retreaded tire comprising:
providing at least one buffer brush comprising:
a first end plate having a plurality of openings and a second end plate having a plurality of openings;
at least one brush segment comprising a core having openings configured for lateral air flow and vents configured for radial air flow and brush bristles extending radially from the core;
the at least one brush segment mounted between the first end plate and the second end plate and configured such that air can flow through the openings in the first end plate and the second end plate and through the openings configured for lateral air flow and vents configured for radial air flow;
rotating the buffer brush such that air flows laterally through the core and radially through the vents;
processing a tread section through the at least one buffer brush such that the processed tread section has a texturized surface;
buffing a tire casing such that a worn tread is removed from the casing;
applying the tread section to the tire casing.
10. The method of manufacturing according to claim 9 wherein a plurality brush segments comprise the core.
11. The method of manufacturing according to claim 9 wherein the step of buffing a tire casing further comprises using the at least one buffer brush to buff the tire casing.
12. The method of manufacturing according to claim 9 further comprising the step of collecting dust using a vacuum pump adjacent to the buffer brush.
13. The method of manufacturing according to claim 9 wherein the buffer brush is a wire brush.
14. The method of manufacturing according to claim 9 wherein the step of rotating further comprises rotating the buffer brush with an electric motor.
15. A method of buffing comprising:
providing a buffer brush comprising
a core having a first side and a second side, wherein a brush extends radially from the surface of the core;
at least one opening in the first side and at least one opening in the second side, wherein the opening in the first side and the opening in the second side are configured to allow air to flow laterally through the core;
a plurality of vents on the surface of the core;
rotating the buffer brush such that air flows laterally through the core and radially through the vents.
16. The method of claim 15 further comprising the step of buffing a tire with the buffer brush.
17. The method of claim 16 further comprising the step of vacuuming dust generated by buffing the tire with a vacuum adjacent to the buffer brush.
18. The method of claim 15 wherein a plurality brush segments comprise the core.
19. The method of claim 15 the brush is a wire brush.
20. The method of claim 15 the brush contains gaps configured to facilitate air flow through the brush.
US12/629,486 2009-12-02 2009-12-02 Passive buffer brush air cooling Abandoned US20110126961A1 (en)

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US12/629,486 US20110126961A1 (en) 2009-12-02 2009-12-02 Passive buffer brush air cooling
PCT/US2010/055840 WO2011068635A2 (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
EP10834921.8A EP2507044B1 (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
EP16193644.8A EP3141344A1 (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
BR112012012790A BR112012012790A2 (en) 2009-12-02 2010-11-08 passive polishing brush air cooling
AU2010326326A AU2010326326B2 (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
JP2012542031A JP5567681B2 (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
CN2010800545041A CN102712152A (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
MX2012005158A MX2012005158A (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling.
CA2780123A CA2780123A1 (en) 2009-12-02 2010-11-08 Passive buffer brush air cooling
US13/788,915 US9227287B2 (en) 2009-12-02 2013-03-07 Passive buffer brush air cooling
JP2014125305A JP6023124B2 (en) 2009-12-02 2014-06-18 Passive buffer brush air cooling
AU2015200835A AU2015200835B2 (en) 2009-12-02 2015-02-19 Passive buffer brush air cooling
US14/948,659 US10493586B2 (en) 2009-12-02 2015-11-23 Passive buffer brush air cooling

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EP2507044A2 (en) 2012-10-10
CN102712152A (en) 2012-10-03
AU2015200835B2 (en) 2016-07-07
CA2780123A1 (en) 2011-06-09
US9227287B2 (en) 2016-01-05
AU2015200835A1 (en) 2015-03-12
JP2013512799A (en) 2013-04-18
JP5567681B2 (en) 2014-08-06
US20130180645A1 (en) 2013-07-18
JP6023124B2 (en) 2016-11-09
EP2507044A4 (en) 2013-10-30
JP2014208490A (en) 2014-11-06
BR112012012790A2 (en) 2017-04-04
WO2011068635A3 (en) 2011-09-29
MX2012005158A (en) 2012-11-09
AU2010326326A1 (en) 2012-05-17
WO2011068635A2 (en) 2011-06-09
US20160074982A1 (en) 2016-03-17
EP2507044B1 (en) 2016-12-14
US10493586B2 (en) 2019-12-03
EP3141344A1 (en) 2017-03-15

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