CN105618329A - Jet dispensing valve and dispensing method thereof - Google Patents
Jet dispensing valve and dispensing method thereof Download PDFInfo
- Publication number
- CN105618329A CN105618329A CN201610135991.3A CN201610135991A CN105618329A CN 105618329 A CN105618329 A CN 105618329A CN 201610135991 A CN201610135991 A CN 201610135991A CN 105618329 A CN105618329 A CN 105618329A
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- Prior art keywords
- air pressure
- striker
- valve
- pressure chamber
- mouth
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
Abstract
The invention discloses a jet dispensing valve and a dispensing method thereof. The jet dispensing valve comprises an upper air pressure cavity 1, a striker 2, a lower air pressure cavity 3, a lower exhaust hole 5, an upper exhaust hole 7 and a solenoid valve 16. When the solenoid valve is located at an upper station, high-pressure air enters the lower air pressure cavity 3 via the lower exhaust hole 5, air in the upper air pressure cavity 1 is exhausted into the atmosphere via the upper exhaust hole 7, and then the striker is pushed by the high-pressure air to ascend and compress a spring 8; when the solenoid valve is located at a lower station, high-pressure air of the lower air pressure cavity enters the upper air pressure cavity via the lower exhaust hole and the upper exhaust hole, the air pressure of the upper air pressure cavity and the air pressure of the lower air pressure cavity are almost balanced, and the striker is pushed by the spring to descend so as to jet a glue solution out of the valve. The air pressure of the upper air pressure cavity and the air pressure of the lower air pressure cavity are almost balanced during descending of the striker since the upper air pressure cavity and the lower air pressure cavity communicate with each other; accordingly, the influence on the motion stability of the striker by fluctuation of the air pressure is reduced; meanwhile, as the air pressure of the upper air pressure cavity offsets the air pressure resistance of the lower air pressure cavity, the motion speed of the striker is increased.
Description
Technical field
The invention belongs to package equipment for micro-electron field, it relates to a kind of jet-type glue dispensing valve and dispensing method thereof.
Background technology
In microelectronics Packaging process, gluing process is widely used. Difference according to type of drive, some glue can be divided into four classes: time pressure formula, screw pump, piston-type and jet-type, wherein jet-type belongs to noncontact formula point glue. Due to the high-level efficiency of jet-type point glue and untouchable, jet-type point glue obtains in microelectronics Packaging to be applied more and more widely.
The jet-type glue dispensing valve used in current industrial is air pressure-spring loaded glue spraying valve mainly, in glue spraying valve working process, is realized the break-make of high pressure gas by control two-position three-way electromagnetic valve, and magnetic valve principle used is such as Fig. 6. When magnetic valve is in upper station, under glue spraying valve, air pressure chamber leads to into high pressure gas, striker upwards moves and compression spring, the air pressure chamber cut off high gas under glue spraying valve when magnetic valve is in lower station, and connect with air, striker moves downward under the promotion of spring power, thus realize the up and down motion of striker, it is achieved putting glue fast, in whole process, upper air pressure chamber is connected with air all the time. Although this kind of method can complete a glue process, but have the following disadvantages: gas belongs to compressibility gas, moving downward at striker to cause the air pressure in lower air pressure chamber to there is certain fluctuation in process, so that also there is certain fluctuation in striker speed, cause plastic emitting volume each time all to there is difference, reduce glue spraying quality; High pressure gas pressure leak process in the lower air pressure chamber needle movement that can clash produces very big resistance so that striker speed reduces, thus reduces the injection ability of glue spraying valve.
Summary of the invention
The present invention is in order to improve the striker stability of motion of existing jet valve, improve striker movement velocity simultaneously thus improve the injection ability of jet valve, propose a kind of jet-type glue dispensing valve and dispensing method thereof, move downward in process at striker, by the high pressure gas in lower air pressure chamber is imported to upper air pressure chamber, the impact of balance atmospheric pressure head-on collision needle movement, thus improve glue spraying quality and the injection ability of jet valve.
Eddy current displacement sensor is utilized to gather the displacement in striker decline process, and calculate the velocity and acceleration of striker in each moment, finding that the speed of striker exists fluctuation to a certain degree, this will certainly affect the plastic emitting volume of jet valve, reduces glue spraying quality. Find that striker can experience the low-speed motion of long period, reduces glue spraying efficiency in the starting stage of striker motion simultaneously. Derive by striker being carried out analyze scheduling theory by power, find in striker moving process, air pressure in lower air pressure chamber can experience the pressure leak process of for some time, in pressure leak process, the air pressure resistance in lower air pressure chamber is the predominant intermolecular forces hindering striker motion, and causes air pressure that the reactive force of striker is also unstable due to the fluctuation of atmospheric pressure. Along with the inner high voltage gas pressure release gradually of lower air pressure chamber, air pressure resistance also reduces gradually so that striker motion increases with joint efforts gradually, and striker acceleration also increases gradually, striker is just accelerated fast after slowly motion for some time, reduces glue spraying efficiency.
A kind of injection glue dispensing valve, comprise valve body 14 under jet valve upper valve body 13, jet valve, striker 2, magnetic valve 16, lower venting hole 5, upper air-vent 7, lower air pressure chamber sealing-ring 4, striker piston ring 6, initial tension of spring regulate assembly 12, striker stroke adjustment assembly 11 and nozzle assembly 15; The piston lower surface of described striker and jet valve upper valve body are around the lower air pressure chamber of formation; The piston upper surface of described striker and preliminary tension regulate knob inwall around the upper air pressure chamber of formation;
Also comprising striker stroke adjustment knob sealing-ring 9 and preliminary tension adjustment knob sealing-ring 10, described magnetic valve 16 is two-position four-way solenoid valve;
Described lower air pressure chamber is sealed by lower air pressure chamber sealing-ring 4 and striker piston ring 6, and described upper air pressure chamber regulates knob sealing-ring 10 to seal by striker piston ring 6, striker stroke adjustment knob sealing-ring 9 and preliminary tension;
Described upper air-vent 7 and lower venting hole 5 are opened in jet valve cavity respectively in the upper and lower both sides of striker, lower venting hole 5 is connected with A mouth with two working oil mouth B mouths of magnetic valve 16 respectively with upper air-vent 7, and air feed and the exhaust in upper air pressure chamber and lower air pressure chamber are controlled by magnetic valve 16.
A kind of dispensing method spraying glue dispensing valve in air pressure chamber under air pressure chamber on lower air pressure chamber, adopts above-mentioned jet-type glue dispensing valve to carry out a glue, and detailed process is as follows:
When spraying glue dispensing valve and need to add glue, Controlling solenoid valve 16 is in station, magnetic valve P mouth and A mouth are connected, T mouth and B mouth are connected, high pressure gas enters lower air pressure chamber 3 from P mouth through lower venting hole 5, upper air pressure chamber 1 is connected with magnetic valve T mouth through upper air-vent 7, and upper air pressure intracavity gas is entered air, and striker rises under the promotion of high pressure gas and compresses preloading spring 8;
When spraying glue dispensing valve and need glue spraying, Controlling solenoid valve is in lower station, P mouth and T mouth are closed, A mouth and B mouth are connected, the high pressure gas in lower air pressure chamber enters upper air pressure chamber through lower venting hole and upper air-vent, the air pressure in upper and lower air pressure chamber is close to balance, and striker moves downward under the promotion of preloading spring, is sprayed valve from nozzle 15 by glue liquid.
Useful effect
The present invention provides a kind of jet-type glue dispensing valve and dispensing method thereof, this injection glue dispensing valve comprises air pressure chamber 1, striker 2, lower air pressure chamber 3, lower venting hole 5, upper air-vent 7 and magnetic valve 16, in the process that striker upwards moves, lower air pressure chamber leads to into high pressure gas, upper air pressure chamber and air are interconnected, ensure that striker energy rapid increase, in the process that striker moves downward, described upper air pressure chamber and lower air pressure chamber are interconnected by magnetic valve 16, and isolate with ambient atmosphere environment. finding with theoretical analysis by experiment, existing jet valve moves downward in process at striker, and the air pressure resistance in lower air pressure chamber can cause striker movement velocity unstable, and accelerates slowly. by implementing the prioritization scheme of the present invention, in the process that striker moves downward, air pressure fluctuation in lower air pressure chamber can be delivered to air pressure chamber fast, air pressure in upper and lower air pressure chamber is fluctuated simultaneously, the atmospheric pressure fluctuation of striker both sides of high pressure gas active balance in final air pressure chamber up and down, reduce the impact of the atmospheric pressure fluctuation head-on collision needle movement stability that air pressure fluctuation brings, simultaneously owing to the gas in upper air pressure chamber also turns into high pressure gas, this is equivalent to be applied with motivating force to striker, increase making a concerted effort of striker motion, improve the movement velocity of striker, thus improve glue spraying quality and the glue spraying ability of jet valve.
The present invention has found that by a large amount of simulation and experiments the important factor causing glue spraying inconsistent in glue spraying valve is the air pressure fluctuation existed in upper and lower air pressure chamber, owing to upper air pressure chamber of the prior art is connected with air always, thus it is inconsistent to have caused glue spraying, this and thinking direction of the prior art are completely different, prior art sets about improving from the drive unit of glue spraying mostly, thus promote glue spraying consistence, and method of the present invention, after separately warding off path and having found the problem place that glue spraying is inconsistent, the air pressure in lower air pressure chamber is made to import upper air pressure chamber by magnetic valve, when striker is declined, the air pressure in upper air pressure chamber and lower air pressure chamber reaches balance, overcome the impact that air pressure fluctuation brings.
Accompanying drawing explanation
Fig. 1 is the sectional view of the jet-type glue dispensing valve of the present invention;
Fig. 2 is the front view of the jet-type glue dispensing valve of the present invention;
Fig. 3 is the present invention's magnetic valve principle schematic used;
Fig. 4 is the striker movement velocity curve of new and old two kinds of jet-type glue dispensing valves;
Fig. 5 is the striker movement velocity fluctuation change rate curve of new and old two kinds of jet-type glue dispensing valves;
Fig. 6 is prior art magnetic valve principle schematic used;
Label illustrates: the upper air pressure chamber of 1-, 2-striker, air pressure chamber under 3-, air pressure chamber sealing-ring under 4-, venting hole under 5-, 6-upper air pressure chamber sealing-ring, 7-upper air-vent, 8-preloading spring, 9-striker stroke adjustment knob sealing-ring, 10-preliminary tension regulates knob sealing-ring, 11-striker stroke adjustment assembly, and 12-initial tension of spring regulates assembly, 13-jet valve upper valve body, valve body under 14-jet valve, 15-nozzle, 16-magnetic valve.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
As shown in Figure 1, Figure 2 and Figure 3, a kind of injection glue dispensing valve, comprise valve body 14 under jet valve upper valve body 13, jet valve, striker 2, magnetic valve 16, lower venting hole 5, upper air-vent 7, lower air pressure chamber sealing-ring 4, striker piston ring 6, initial tension of spring regulate assembly 12, striker stroke adjustment assembly 11 and nozzle assembly 15; The piston lower surface of described striker and jet valve upper valve body are around the lower air pressure chamber of formation; The piston upper surface of described striker and preliminary tension regulate knob inwall around the upper air pressure chamber of formation;
Also comprising striker stroke adjustment knob sealing-ring 9 and preliminary tension adjustment knob sealing-ring 10, described magnetic valve 16 is two-position four-way solenoid valve;
Described lower air pressure chamber is sealed by lower air pressure chamber sealing-ring 4 and striker piston ring 6, and described upper air pressure chamber regulates knob sealing-ring 10 to seal by striker piston ring 6, striker stroke adjustment knob sealing-ring 9 and preliminary tension;
Described upper air-vent 7 and lower venting hole 5 are opened in jet valve cavity respectively in the upper and lower both sides of striker, lower venting hole 5 is connected with A mouth with two working oil mouth B mouths of magnetic valve 16 respectively with upper air-vent 7, and air feed and the exhaust in upper air pressure chamber and lower air pressure chamber are controlled by magnetic valve 16.
Spraying a dispensing method for glue dispensing valve, adopt above-mentioned jet-type glue dispensing valve to carry out a glue, detailed process is as follows:
When spraying glue dispensing valve and need to add glue, Controlling solenoid valve 16 is in station, magnetic valve P mouth and A mouth are connected, T mouth and B mouth are connected, high pressure gas enters lower air pressure chamber 3 from P mouth through lower venting hole 5, upper air pressure chamber 1 is connected with magnetic valve T mouth through upper air-vent 7, and upper air pressure intracavity gas is entered air, and striker rises under the promotion of high pressure gas and compresses preloading spring 8;
When spraying glue dispensing valve and need glue spraying, Controlling solenoid valve is in lower station, P mouth and T mouth are closed, A mouth and B mouth are connected, the high pressure gas in lower air pressure chamber enters upper air pressure chamber through lower venting hole and upper air-vent, the air pressure in upper and lower air pressure chamber is close to balance, and striker moves downward under the promotion of preloading spring, is sprayed valve from nozzle 15 by glue liquid. On lower air pressure chamber, under air pressure chamber, under air pressure chamber, on air pressure chamber, on air pressure chamber, under air pressure chamber, on air pressure chamber, under air pressure chamber air pressure chamber
In order to prove the validity of this invention, respectively the striker moving process optimizing front latter two jet-type glue dispensing valve is carried out simulation analysis by emulation. In simulation process, by the air pressure in lower air pressure chamber applies the fluctuation of sinusoidal form, the striker motion conditions of front latter two jet valve is optimized in contrast, and the striker velocity curve in emulation result is as shown in Figure 4. DefinitionFor striker velocity magnitude fluctuation velocity of variation, such as formula (1), wherein v2For having the striker speed in air pressure fluctuation situation, v1For without the striker speed in air pressure fluctuation situation. Calculate the fluctuation velocity of variation of striker speed according to formula (1), as shown in Figure 5, wherein the maximum value of velocity fluctuation velocity of variation is such as table 1 for result.
Table 1
By the data in table 1 it may be seen that the structure that the method for the invention proposes significantly reduces striker velocity fluctuation, the raising that jet valve carries out glue spraying consistence has unusual effect.
Claims (2)
1. spray a glue dispensing valve, comprise valve body (14) under jet valve upper valve body (13), jet valve, striker (2), magnetic valve (16), lower venting hole (5), upper air-vent (7), lower air pressure chamber sealing-ring (4), striker piston ring (6), initial tension of spring regulate assembly (12), striker stroke adjustment assembly (11) and nozzle assembly (15); The piston lower surface of described striker and jet valve upper valve body are around the lower air pressure chamber (3) of formation; The piston upper surface of described striker and preliminary tension regulate knob inwall around the upper air pressure chamber (1) of formation;
It is characterized in that, also comprising striker stroke adjustment knob sealing-ring (9) and preliminary tension adjustment knob sealing-ring (10), described magnetic valve (16) is two-position four-way solenoid valve;
Described lower air pressure chamber is sealed by lower air pressure chamber sealing-ring (4) and striker piston ring (6), and described upper air pressure chamber regulates knob sealing-ring (10) to seal by striker piston ring (6), striker stroke adjustment knob sealing-ring (9) and preliminary tension;
Described upper air-vent (7) and lower venting hole (5) are opened in jet valve cavity respectively in the upper and lower both sides of striker, lower venting hole (5) is connected with A mouth with two work gas port B mouths of magnetic valve (16) respectively with upper air-vent (7), and the air feed in upper air pressure chamber and lower air pressure chamber and exhaust are controlled by magnetic valve (16).
2. one kind is sprayed the dispensing method of glue dispensing valve, it is characterised in that, adopt injection glue dispensing valve according to claim 1 to carry out a glue, detailed process is as follows:
When spraying glue dispensing valve and need to add glue, Controlling solenoid valve (16) is in station, magnetic valve P mouth and A mouth are connected, T mouth and B mouth are connected, high pressure gas enters lower air pressure chamber (3) from P mouth through lower venting hole (5), upper air pressure chamber (1) is connected with magnetic valve T mouth through upper air-vent (7), and upper air pressure intracavity gas is entered air, and striker rises under the promotion of high pressure gas and compresses preloading spring (8);
When spraying glue dispensing valve and need glue spraying, Controlling solenoid valve is in lower station, P mouth and T mouth are closed, A mouth and B mouth are connected, the high pressure gas in lower air pressure chamber enters upper air pressure chamber through lower venting hole and upper air-vent, the air pressure in upper and lower air pressure chamber is close to balance, and striker moves downward under the promotion of preloading spring, is sprayed valve from nozzle (15) by glue liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610135991.3A CN105618329A (en) | 2016-03-10 | 2016-03-10 | Jet dispensing valve and dispensing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610135991.3A CN105618329A (en) | 2016-03-10 | 2016-03-10 | Jet dispensing valve and dispensing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105618329A true CN105618329A (en) | 2016-06-01 |
Family
ID=56033899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610135991.3A Pending CN105618329A (en) | 2016-03-10 | 2016-03-10 | Jet dispensing valve and dispensing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN105618329A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018152972A1 (en) * | 2017-02-21 | 2018-08-30 | 南通中菱绝缘材料有限公司 | Inching-type air pressure glue dropper |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969602A (en) * | 1988-11-07 | 1990-11-13 | Nordson Corporation | Nozzle attachment for an adhesive dispensing device |
| CN102950071A (en) * | 2011-08-26 | 2013-03-06 | 诺信公司 | Pneumatic jetting valve, improved jetting system and improved jetting methods |
| CN203264979U (en) * | 2013-05-28 | 2013-11-06 | 全天自动化能源科技（东莞）有限公司 | Glue dispensing valve |
| CN103521396A (en) * | 2013-10-31 | 2014-01-22 | 刘飞 | Pneumatic injection valve |
| CN104245152A (en) * | 2012-02-06 | 2014-12-24 | 武藏工业株式会社 | Liquid material discharge device and discharge method |
| CN105149167A (en) * | 2015-10-16 | 2015-12-16 | 林和德 | Negative pressure feedback re-suction ejector pin type dispensing valve |
-
2016
- 2016-03-10 CN CN201610135991.3A patent/CN105618329A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969602A (en) * | 1988-11-07 | 1990-11-13 | Nordson Corporation | Nozzle attachment for an adhesive dispensing device |
| CN102950071A (en) * | 2011-08-26 | 2013-03-06 | 诺信公司 | Pneumatic jetting valve, improved jetting system and improved jetting methods |
| CN104245152A (en) * | 2012-02-06 | 2014-12-24 | 武藏工业株式会社 | Liquid material discharge device and discharge method |
| CN203264979U (en) * | 2013-05-28 | 2013-11-06 | 全天自动化能源科技（东莞）有限公司 | Glue dispensing valve |
| CN103521396A (en) * | 2013-10-31 | 2014-01-22 | 刘飞 | Pneumatic injection valve |
| CN105149167A (en) * | 2015-10-16 | 2015-12-16 | 林和德 | Negative pressure feedback re-suction ejector pin type dispensing valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018152972A1 (en) * | 2017-02-21 | 2018-08-30 | 南通中菱绝缘材料有限公司 | Inching-type air pressure glue dropper |
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Application publication date: 20160601 |
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| WD01 | Invention patent application deemed withdrawn after publication |