US2917782A - Molding and casting process - Google Patents

Molding and casting process Download PDF

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Publication number
US2917782A
US2917782A US589935A US58993556A US2917782A US 2917782 A US2917782 A US 2917782A US 589935 A US589935 A US 589935A US 58993556 A US58993556 A US 58993556A US 2917782 A US2917782 A US 2917782A
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United States
Prior art keywords
foam
mold
molding
foot
casting process
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Expired - Lifetime
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US589935A
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Harry L Goldwag
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Individual
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Priority to US589935A priority Critical patent/US2917782A/en
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    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00Footwear with health or hygienic arrangements
    • A43B7/14Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/28Adapting the inner sole or the side of the upper of the shoe to the sole of the foot
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1077Measuring of profiles
    • A61B5/1078Measuring of profiles by moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/38Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
    • B29C33/3878Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts used as masters for making successive impressions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/38Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
    • B29C2033/3871Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts the models being organic material, e.g. living or dead bodies or parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/753Medical equipment; Accessories therefor
    • B29L2031/7532Artificial members, protheses
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/30Use of anatomy in making a mold or using said mold

Definitions

  • an object of my invention to provide a new method for forming casts or molds in which the mold material is instantaneously available without mixing. It is a further object of my invention to make a mold which can be processed from dry material obviating the discomfort and messiness which is associated with the material of plaster of Paris.
  • Figure l is a perspective view of a box containing a quantity of phenolic foam
  • Figure 2 is a perspective view of the box shown in Figure 1, with the foot of a person pressed into the foam for the purpose of forming the mold.
  • the phenolic foam may be contained in a cardboard box 11 or a box of suitable material. I make no claim for the material of the foam. It is manufactured from foarnable resin and may be made in varying densities by varying the ingredients. When it is com pressed, the crushing action of the compression breaks down the cells of the foam and it will not spring back. It is therefore an ideal substance for making a mold of any object which is pressed into it. It will retain the exact configuration of the object. This type of foam may be obtained commercially from various companies in the United States.
  • the foam 10 is set up in a box 11 of a suitable size to receive a human foot 12.
  • the foot 12 is then placed over the foam at right angles to the patients leg and in this position is pressed into the foam 10.
  • the foot 12 may then be removed from the foam 10 immediately. Since the pressure of the foot 12 on the foam 10 breaks down the cells of the foam 10 and they do not spring back into position, a perfect mold of the foot has been made.
  • a solution of plaster of Paris is then poured into the mold and allowed to harden or the mold form may be sprayed or painted with a varnish to fix it in position.
  • plaster of Paris solution may be permitted to harden as quickly or slowly as desired. After the plaster of Paris cast is removed from the mold, it is a perfect reproduction of the bottom of the foot 12.
  • a process of obtaining an exact mold of any member of the body which comprises preparing a block of set phenolic resinous foam; then placing the block of set foam, of a type which becomes stiff when set and will retain the impression of a form impressed thereon on a platform; then taking the member of the body of which it is desired to obtain a mold and impressing same into the set foam in order to make a negative impression; then lifting the said member of the body out of the negative impression so formed; then pouring a solution adapted to be hardened, into the negative impression thus formed in the set foam, and permitting the aforesaid solution to harden into an exact positive mold.

Description

Dec. 22, 1959 H. L. GOLDWAG MOLDING AND CASTING PROCESS Filed June '7. 1956 INVENTOR.
HAZE) L. GOLDWAG BY EMMA ATTORNEY MOLDING AND CASTING PROCESS Harry L. Goldwag, New York, N.Y.
Application June 7, 1956, Serial No. 589,935
1 Claim. (Cl. 18-5505) My invention relates to a new process for making casts with the use of a phenolic foam as I will describe hereinbelow. The usual method for making casts of objects, particularly parts of the human body, involves the use of a substance, such as plaster of Paris, involving many disadvantages. In the first place, if we are dealing with a member of the human body, such as a foot, the plaster of Paris must be mixed precisely so that it will harden within a given time or else the patient will be kept waiting too long to his discomfort and possible injury.
It is, therefore, an object of my invention to provide a new method for forming casts or molds in which the mold material is instantaneously available without mixing. It is a further object of my invention to make a mold which can be processed from dry material obviating the discomfort and messiness which is associated with the material of plaster of Paris.
I accomplish these objects by the use of a phenolic foam in my process for making molds or impressions. In the accompanying drawings Figure l is a perspective view of a box containing a quantity of phenolic foam;
Figure 2 is a perspective view of the box shown in Figure 1, with the foot of a person pressed into the foam for the purpose of forming the mold.
Similar numerals refer to similar parts throughout the several views. The phenolic foam may be contained in a cardboard box 11 or a box of suitable material. I make no claim for the material of the foam. It is manufactured from foarnable resin and may be made in varying densities by varying the ingredients. When it is com pressed, the crushing action of the compression breaks down the cells of the foam and it will not spring back. It is therefore an ideal substance for making a mold of any object which is pressed into it. It will retain the exact configuration of the object. This type of foam may be obtained commercially from various companies in the United States.
While it may be used in many ways as a molding device, I will illustrate its use in this specification in a process for making casts of feet 12. The foam 10 is set up in a box 11 of a suitable size to receive a human foot 12. The foot 12 is then placed over the foam at right angles to the patients leg and in this position is pressed into the foam 10. The foot 12 may then be removed from the foam 10 immediately. Since the pressure of the foot 12 on the foam 10 breaks down the cells of the foam 10 and they do not spring back into position, a perfect mold of the foot has been made. A solution of plaster of Paris is then poured into the mold and allowed to harden or the mold form may be sprayed or painted with a varnish to fix it in position.
It will be appreciated that in my process the plaster of Paris solution may be permitted to harden as quickly or slowly as desired. After the plaster of Paris cast is removed from the mold, it is a perfect reproduction of the bottom of the foot 12.
While I have described the preferred form of my'invention, the foam may be used in many different ways for making molds and casts Without departing from the essential process of my invention and I therefore wish to be protected within the limits of the claim following.
Wherefore, I claim:
A process of obtaining an exact mold of any member of the body, which comprises preparing a block of set phenolic resinous foam; then placing the block of set foam, of a type which becomes stiff when set and will retain the impression of a form impressed thereon on a platform; then taking the member of the body of which it is desired to obtain a mold and impressing same into the set foam in order to make a negative impression; then lifting the said member of the body out of the negative impression so formed; then pouring a solution adapted to be hardened, into the negative impression thus formed in the set foam, and permitting the aforesaid solution to harden into an exact positive mold.
References Cited in the file of this patent UNITED STATES PATENTS 1,926,916 Reeves Sept. 12, 1933 2,282,908 Thompson May 12, 1942 2,547,419 Sugarman et al Apr. 3, 1951 2,565,758 Covino Aug. 28, 1951 2,576,911 Amos Dec. 4, 1951 2,722,719 Alstader Nov. 8, 1955
US589935A 1956-06-07 1956-06-07 Molding and casting process Expired - Lifetime US2917782A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120029A (en) * 1961-03-13 1964-02-04 Western Electric Co Mold for casting electrical component mounting panels
US3320347A (en) * 1964-05-18 1967-05-16 Monte H Greenawalt Method of making an arch support by measuring an impression of a foot
US3398221A (en) * 1965-06-09 1968-08-20 Sherman Lawrence Method of producing shoe inserts
US4431394A (en) * 1981-07-06 1984-02-14 Collett Lee W Marshmallow mold
US4669142A (en) * 1985-11-27 1987-06-02 Meyer Grant C Method for making footwear insole
US4716662A (en) * 1984-04-22 1988-01-05 Aharon Bar Insole and method for producing same
US4756096A (en) * 1985-11-27 1988-07-12 Meyer Grant C Footwear insole
US5578260A (en) * 1994-10-06 1996-11-26 Desena; Danforth Apparatus and process for making a mold of the foot, ankle, and lower leg
EP1237480A2 (en) * 1999-11-05 2002-09-11 Amfit, Inc. Method and apparatus for measuring foot geometry
US20080048093A1 (en) * 2006-08-22 2008-02-28 Scott Peterson Concrete form
US11832688B2 (en) * 2019-09-13 2023-12-05 DIY Custom Insoles LLC System and method for forming custom insoles for use in footwear

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1926916A (en) * 1931-04-01 1933-09-12 Edward H Reeves Egg container
US2282908A (en) * 1940-03-21 1942-05-12 Edward M Thompson Internally cushioned box
US2547419A (en) * 1948-04-19 1951-04-03 Emanuel E Sugarman Method of obtaining foot impressions
US2565758A (en) * 1950-08-10 1951-08-28 Covino Salvatore Preparation of orthopedic appliances
US2576911A (en) * 1950-01-17 1951-12-04 Dow Chemical Co Method of making cellular thermoplastic products
US2722719A (en) * 1952-01-09 1955-11-08 Altstadter George Method of forming floating soap-dish

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1926916A (en) * 1931-04-01 1933-09-12 Edward H Reeves Egg container
US2282908A (en) * 1940-03-21 1942-05-12 Edward M Thompson Internally cushioned box
US2547419A (en) * 1948-04-19 1951-04-03 Emanuel E Sugarman Method of obtaining foot impressions
US2576911A (en) * 1950-01-17 1951-12-04 Dow Chemical Co Method of making cellular thermoplastic products
US2565758A (en) * 1950-08-10 1951-08-28 Covino Salvatore Preparation of orthopedic appliances
US2722719A (en) * 1952-01-09 1955-11-08 Altstadter George Method of forming floating soap-dish

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120029A (en) * 1961-03-13 1964-02-04 Western Electric Co Mold for casting electrical component mounting panels
US3320347A (en) * 1964-05-18 1967-05-16 Monte H Greenawalt Method of making an arch support by measuring an impression of a foot
US3398221A (en) * 1965-06-09 1968-08-20 Sherman Lawrence Method of producing shoe inserts
US4431394A (en) * 1981-07-06 1984-02-14 Collett Lee W Marshmallow mold
US4716662A (en) * 1984-04-22 1988-01-05 Aharon Bar Insole and method for producing same
US4669142A (en) * 1985-11-27 1987-06-02 Meyer Grant C Method for making footwear insole
US4756096A (en) * 1985-11-27 1988-07-12 Meyer Grant C Footwear insole
US5578260A (en) * 1994-10-06 1996-11-26 Desena; Danforth Apparatus and process for making a mold of the foot, ankle, and lower leg
EP1237480A2 (en) * 1999-11-05 2002-09-11 Amfit, Inc. Method and apparatus for measuring foot geometry
EP1237480A4 (en) * 1999-11-06 2008-11-12 Amfit Inc Method and apparatus for measuring foot geometry
US20080048093A1 (en) * 2006-08-22 2008-02-28 Scott Peterson Concrete form
US11832688B2 (en) * 2019-09-13 2023-12-05 DIY Custom Insoles LLC System and method for forming custom insoles for use in footwear

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