KR101784358B1 - Vacuum and pressure control system for infection molding - Google Patents
Vacuum and pressure control system for infection molding Download PDFInfo
- Publication number
- KR101784358B1 KR101784358B1 KR1020150159818A KR20150159818A KR101784358B1 KR 101784358 B1 KR101784358 B1 KR 101784358B1 KR 1020150159818 A KR1020150159818 A KR 1020150159818A KR 20150159818 A KR20150159818 A KR 20150159818A KR 101784358 B1 KR101784358 B1 KR 101784358B1
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- KR
- South Korea
- Prior art keywords
- vacuum
- mold
- pressure
- hole
- pipe
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1701—Component parts, details or accessories; Auxiliary operations using a particular environment during moulding, e.g. moisture-free or dust-free
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a vacuum and pressurizing method for injection molding which enables a vacuum and pressurized environment to be selectively formed in a mold so as to prevent defects and quality deterioration due to vaporization of gas and moisture generated in a mold during production of a product through an injection molding apparatus, Control system.
Description
The present invention relates to a vacuum and pressurization control system, and more particularly, to a vacuum and pressurization control system for selectively controlling the vacuum and pressurization environment in a mold to prevent defects and quality deterioration due to vaporization of gas and moisture generated in a mold during production of a product through an injection molding apparatus. To a vacuum and pressure control system for injection molding.
Injection molding (injection molding) is a method of producing products from various resins as a raw material, and it is advantageous in mass production of products requiring high precision. Demand is continuously increasing with the development of mold technology.
Such injection molding comprises a step of heating a raw material to which a pigment, a stabilizer, a plasticizer, a filler, and the like are added to a synthetic resin in a molten state at a high temperature, injecting the resin into a mold through a cylinder and a screw, and then solidifying.
In this case, as the raw material is injected into the injection cavity at a relatively low temperature under atmospheric pressure through the plasticizing process at a high temperature, the moisture contained in the raw material is vaporized or gas is generated, which adversely affects the resin flow and mold adhesion, Etc., and the appearance defects of such articles are also influenced by post-processing painting, plating, coating, and deposition, thereby causing defective products.
There is a conventional technique for solving such a problem, for example, there is a method of sufficiently drying a resin used as a raw material before melting. However, since a separate device for drying the raw material must be provided, there is a disadvantage that the cost of the product is increased due to a high initial cost and an increase in power consumption and maintenance cost due to driving, and even if the raw material is dried, There is still a problem that the surface quality of the product is deteriorated due to the gas generated due to the characteristics of the chemical raw material as well as the vaporization in the inside of the male mold.
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing an injection-molded product in which a vacuum and a pressurized environment are selectively formed in a mold to produce vapor- And to provide a vacuum and pressurization control system for injection molding that allows gas to be discharged to obtain good surface quality.
In order to achieve the above-mentioned object, according to the present invention, there is provided a method of manufacturing a semiconductor device, including a first through-hole and a second through-hole for supplying a molten raw material to one side and forming an injection cavity by mutual coupling, A mold unit comprising a first mold and a second mold to be formed; A vacuum pressurizing unit comprising a compressor for producing compressed air, a storage tank for storing the produced compressed air, and a vacuum ejector operated by pneumatic pressure applied from the storage tank; A second pressurizing pipe connected to the first through hole on one side and a first vacuum pipe connected to the second through hole respectively and connected to the storage tank on the other side and a second pressurizing pipe connected to the vacuum ejector Wherein the first vacuum pipe and the second vacuum pipe are selectively connected to each other in accordance with a control signal, or the first vacuum pipe and the second vacuum pipe are communicated with each other; A control unit for controlling the compressor, the vacuum ejector and the switching valve unit in cooperation with a control system of the injection molding machine; .
A pressure sensing part formed on the first through hole or the second through hole to sense a pressure inside the injection cavity; and a controller for monitoring the sensing result of the pressure sensing part according to time, And an alarm unit for outputting an alarm signal.
The first pressurizing pipe and the second pressurizing pipe are automatically opened at a pressure higher than the set pressure so that the internal pressure of the compressor And a relief valve for discharging air.
The first pressurizing pipe and the first vacuum pipe may further include a check valve for controlling the air flow in one direction so as to pressurize the inside of the injection cavity or to form a vacuum.
The mold part may include a first sealing member formed on the first mold part and a second sealing member formed on the second mold part to seal the outside of the contact part between the first mold and the second mold.
By forming a vacuum in the injection cavity through injection molding according to the present invention, it is possible to observe the pressure and cooling effect together with the removal of foreign substances and residual gas, and pressurize the inside of the injection cavity constantly during the injection of the raw material, The surface quality of the product can be improved. In particular, by implementing these two functions as a single system, selective vacuum and pressurization can be achieved, thereby improving the quality of the injection-molded product and minimizing the defect rate while reducing the burden on the user.
1 is a cross-sectional view illustrating a structure of a mold according to a preferred embodiment of the present invention,
2 is a flow diagram illustrating the air flow according to a preferred embodiment of the present invention,
3 is a block diagram illustrating a configuration and a connection relationship according to a preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vacuum and pressure control system for injection molding according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view illustrating a structure of a mold according to a preferred embodiment of the present invention. FIG. 2 is a flow diagram illustrating an air flow according to a preferred embodiment of the present invention. The main constituent of the present invention is basically divided into a mold part 110, a
The mold unit 110 includes a
At this time, a supply hole 115 for supplying the molten raw material to one side is formed so that the raw material can be filled in the
A first through
In order to prevent the gist of the present invention from being blurred, the general construction of the injection molding apparatus is not specifically described, but in the conventional injection molding apparatus, the
In this case, the
In order to prevent air from leaking through the contact portions of the
The
At this time, the
The
The
At this time, there is a phenomenon that moisture in the air compressed air is condensed. Therefore, condensed water may exist in the discharge pipe of the
The
The compressed air can be selectively injected into the
The
If leakage of air occurs in any part of the process of vacuum or pressurization in the
In particular, in the case of the mold part 110 having a closed structure according to the surface contact of the metal, there is a possibility of leakage of air. As mentioned above, the first and
To this end, the present invention includes a pressure sensing
In addition, in order to prevent damage to the system due to excessive air pressure in the process of pressurizing the
In addition, as the first pressurizing
It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.
110: mold part 111: first mold
112: first sealing member 113: second mold
114: second sealing member 115: supply hole
116: first through hole 117: second through hole
118: Cavity 120: Vacuum pressing part
121: compressor 122: storage tank
123: Vacuum ejector 130:
131: first pressurizing pipe 132: first vacuum pipe
133: second pressure piping 134: second vacuum piping
135: relief valve 136: dryer
137: Check valve 140:
141: Pressure sensing unit 142:
V: Solenoid valve
Claims (5)
A vacuum pressurizing unit 122 composed of a compressor 121 for producing compressed air, a storage tank 122 for storing the produced compressed air, and a vacuum ejector 123 operated by pneumatic pressure applied from the storage tank 122 120);
The first pressurizing pipe 131 connected to the first through hole 116 and the first vacuum pipe 132 connected to the second through hole 117 are connected to one side and the storage tank And a second vacuum pipe 134 connected to the vacuum ejector 123 are connected to the first pressure pipe 131 and the second pressure pipe 132 selectively in accordance with a control signal, A switching valve portion 130 for communicating the two pressure piping 133 or for communicating the first vacuum piping 132 and the second vacuum piping 134;
A control unit 140 that controls the compressor 121, the vacuum ejector 123, the switching valve unit 130, and the solenoid valve V in cooperation with the control system of the injection molding machine; Wherein the vacuum and pressurization control system is for injection molding.
A pressure sensing part 141 formed on the first through hole 116 or the second through hole 117 for sensing a pressure inside the injection cavity 118 and a pressure sensor 141 for sensing the pressure sensing part 141 Further comprising a notifying unit (142) for monitoring according to a time flow to determine whether or not a leak has occurred, and outputting an alarm signal when the leakage is determined.
The vacuum pressurizing unit 120 further includes a dryer 136 for removing moisture in the air discharged from the compressor 121 and the storage tank 122,
Characterized in that the first pressurizing pipe (131) and the second pressurizing pipe (133) include a relief valve (135) for automatically opening the internal pressure at a predetermined pressure or higher to discharge the compressed air therein Vacuum and pressure control systems.
The first pressurizing pipe 131 and the first vacuum pipe 132 may further include a check valve 137 for controlling the air flow in one direction so as to pressurize or vacuum the inside of the injection cavity 118 Characterized by a vacuum and pressure control system for injection molding.
The mold part 110 is provided with a first sealing member 112 formed on the first mold part 110 and a second sealing part 112 formed on the second mold part 110 to seal the outside of the contact part between the first mold 111 and the second mold 113, And a second sealing member (114) formed on the portion (110).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150159818A KR101784358B1 (en) | 2015-11-13 | 2015-11-13 | Vacuum and pressure control system for infection molding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150159818A KR101784358B1 (en) | 2015-11-13 | 2015-11-13 | Vacuum and pressure control system for infection molding |
Publications (2)
Publication Number | Publication Date |
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KR20170056303A KR20170056303A (en) | 2017-05-23 |
KR101784358B1 true KR101784358B1 (en) | 2017-10-11 |
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KR1020150159818A KR101784358B1 (en) | 2015-11-13 | 2015-11-13 | Vacuum and pressure control system for infection molding |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102103202B1 (en) * | 2019-06-07 | 2020-04-22 | 윤예성 | air and gas exhaust test equipment of injection mold |
KR102147662B1 (en) * | 2020-04-14 | 2020-08-25 | 윤예성 | air and gas exhaust test equipment of injection mold |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009248510A (en) | 2008-04-09 | 2009-10-29 | Toyota Motor Corp | Method of monitoring resin molding |
KR101038049B1 (en) | 2009-12-31 | 2011-06-01 | 주식회사 유니솔루션플러스 | Apparatus for pressure control in mold for resin injection molding |
KR101149492B1 (en) | 2011-05-17 | 2012-05-24 | 주식회사 유니솔루션플러스 | Apparatus for resin injection molding |
KR101423130B1 (en) | 2012-06-22 | 2014-07-31 | 주식회사 엠피에이테크놀로지 | Apparatus of vacuum injection molding |
-
2015
- 2015-11-13 KR KR1020150159818A patent/KR101784358B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009248510A (en) | 2008-04-09 | 2009-10-29 | Toyota Motor Corp | Method of monitoring resin molding |
KR101038049B1 (en) | 2009-12-31 | 2011-06-01 | 주식회사 유니솔루션플러스 | Apparatus for pressure control in mold for resin injection molding |
KR101149492B1 (en) | 2011-05-17 | 2012-05-24 | 주식회사 유니솔루션플러스 | Apparatus for resin injection molding |
KR101423130B1 (en) | 2012-06-22 | 2014-07-31 | 주식회사 엠피에이테크놀로지 | Apparatus of vacuum injection molding |
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KR20170056303A (en) | 2017-05-23 |
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