KR20140011885A - Apparatus of removing gas for injection molding machine - Google Patents

Apparatus of removing gas for injection molding machine Download PDF

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Publication number
KR20140011885A
KR20140011885A KR1020120079603A KR20120079603A KR20140011885A KR 20140011885 A KR20140011885 A KR 20140011885A KR 1020120079603 A KR1020120079603 A KR 1020120079603A KR 20120079603 A KR20120079603 A KR 20120079603A KR 20140011885 A KR20140011885 A KR 20140011885A
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KR
South Korea
Prior art keywords
gas
raw material
casing
block
injection
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KR1020120079603A
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Korean (ko)
Inventor
최주홍
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최주홍
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Application filed by 최주홍 filed Critical 최주홍
Priority to KR1020120079603A priority Critical patent/KR20140011885A/en
Publication of KR20140011885A publication Critical patent/KR20140011885A/en

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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
    • B29C45/1753—Cleaning or purging, e.g. of the injection unit
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/63—Venting or degassing means

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to an apparatus for removing gas for an injection molding machine which is capable of effectively removing gas included in raw materials for injection molding. The apparatus for removing gas for the injection molding machine comprises: gas removing blocks having first raw material transport holes through which the raw materials for injection molding are passed; and gas removing plates having second raw material transport holes which are connected to the first raw material transport holes and are close to the gas removing blocks. Microgaps are formed between the first and second raw material transport holes. According to the present invention, the apparatus for removing gas can remove residual gas among the completely melted raw materials for injection molding so that defect rate of the injection molded products can be drastically reduced.

Description

Apparatus of removing gas for injection molding machine

The present invention relates to a gas removal device for an injection molding machine, and more particularly, to a gas removal device for an injection molding machine having a structure capable of effectively removing the gas contained in the injection raw material.

As consumer demand for product quality increases, so does the demand for precision in injection molding technology.

Injection molding refers to a manufacturing method for molding a product by adding additives such as pigments, stabilizers, plasticizers, fillers, etc. to plastic raw materials, and then heating the raw materials into a mold in a molten state. Gas may be generated from the molten raw material during the injection molding process. If the gas generated in the melting process is injected directly into the mold without removal, various injection marks, weld lines, bubbles, etc. may occur in the injection molding, which may cause product defects.

If a product has bullet marks, weld lines, bubbles, etc., it may not only be bad in appearance, but also may be weak in strength due to its weak strength. In addition, as well as a huge economic loss due to the generation of defective products, as well as the problem of environmental pollution due to the disposal of materials, it is urgent to develop a technology for removing the gas contained in the raw material for injection.

Conventionally, various apparatuses for removing gas from injection raw materials have been developed, but a certain amount of defective products are inevitably generated because the gas is not completely removed. In addition, when the injection molding machine is stopped for a certain time and the injection raw material is hardened, there is a problem that restarting is very inconvenient.

Korean Patent Publication No. 10-2010-0114418 (2010.10.25)

Therefore, the gas contained in the injection raw material can be effectively removed, uniform heat transfer is possible inside, there is a need for a gas removal device for the injection molding machine of the structure that can be easily melted solid injection raw material.

The technical problem to be achieved by the present invention is to provide a gas removal apparatus for an injection molding machine having a structure capable of effectively removing the gas contained in the injection raw material.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a gas removal device for an injection molding machine, a gas removal block having a first raw material moving hole through which injection material passes, and the gas removal block being in close contact with the first gas removal block. And a gas removing plate having a second raw material moving hole communicating with the raw material moving hole, wherein a fine gap is formed between the first raw material moving hole and the second raw material moving hole.

The gas removing block may be formed by indenting a part of the contact surface with the gas removing plate and forming a gas discharge groove communicating with the minute gap.

The gas removal block may further include a first gas exhaust passage communicating with the gas discharge groove, and the gas removal plate may further include a second gas exhaust passage communicating with the first gas exhaust passage.

And a second casing having a raw material supply pipe through which the raw material for injection is supplied, and a second casing with a raw material discharge pipe through which the raw material for injection is discharged, wherein the degassing block and the gas removing plate include: a first casing; At least one pair may be alternately disposed between the second casings, and the raw material supply pipe, the first raw material moving hole, the second raw material moving hole, and the raw material discharge pipe may communicate with each other to sequentially move the injection raw material. have.

The first raw material moving hole and the second raw material moving hole may be branched into the plurality of raw material supply pipes.

And a first block interposed between the first casing and the gas removing block and having a cone-shaped first protrusion protruding toward the first casing, wherein the first casing is indented to accommodate the first raw material. An additional portion may be formed and the first protrusion may be positioned inside the first material accommodating portion.

The first block may further include a plurality of holes formed in the first protrusion and connected to the first raw material moving hole and the second raw material moving hole.

A second block interposed between the second casing and the gas removing plate and having a cone-shaped second protrusion protruding toward the second casing, wherein the second casing is indented to accommodate a second raw material; An additional portion may be formed and the second protrusion may be positioned inside the second raw material receiving portion.

The gas removing block and the gas removing plate may be exposed to the outside of the first casing and the second casing.

A gas outlet formed in at least one of the first casing and the second casing and communicating with the first gas exhaust passage and the second gas exhaust passage; And a gas combustion unit connected to the gas outlet and combusting the gas.

The filter unit may further include a filter unit connected to the gas combustion unit to remove harmful substances included in the burned gas.

According to the present invention, the degassing apparatus for the injection molding machine can remove residual gas from the raw material for injection in a completely molten state, thereby significantly reducing the defective rate of the injection molded product.

In addition, the degassing device for the injection molding machine can be mounted in any portion of the passage that the injection raw material is moved, the use range is very wide and the utilization dynamic is very high.

The degassing apparatus for the injection molding machine has an advantage of operating the injection molding machine by reheating the injection molding machine in a short time.

1 is a perspective view of a gas removal apparatus for an injection molding machine according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the gas removing apparatus for the injection molding machine of FIG. 1.
3 is a cross-sectional view taken along line AA ′ of the gas removing apparatus for the injection molding machine of FIG. 1.
4 is a plan view and a cross-sectional view taken along the line B-B 'of the gas removing block of FIG.
5 is a schematic partial cross-sectional view for explaining a process of removing bubbles between the gas removal block and the gas removal plate.
6 is a perspective view of a gas removal apparatus for an injection molding machine according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, referring to FIGS. 1 to 4, a gas removing apparatus for an injection molding machine according to an embodiment of the present invention will be described in detail.

1 is a perspective view of a gas removing device for an injection molding machine according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the gas removing device for an injection molding machine of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line B-B 'and a plan view of the gas removal block of FIG.

Degassing apparatus 1 for an injection molding machine according to an embodiment of the present invention is a device for removing the gas contained in the injection raw material injected into the mold. That is, the gas removal device 1 for the injection molding machine is a device that discharges only gas while the raw material for injection molding machine melts and moves to the mold, and continuously injects the raw material into the mold.

Degassing apparatus 1 for the injection molding machine includes a first casing 10, a first block 30, a gas removing block 50, a gas removing plate 60, a second block 40, and a second casing 20. It includes. The gas removing device 1 for the injection molding machine includes at least one gas removing block 50 and a gas removing plate 60, and the gas inside the injection raw material is between the gas removing block 50 and the gas removing plate 60. Discharged. Therefore, the gas removing block 50 and the gas removing plate 60 are arranged in pairs, and a plurality of pairs may be used according to the injection speed and amount of the raw material. Hereinafter, the gas removal device 1 for the injection molding machine will be described in detail with reference to the drawings.

1 and 2, the gas removing apparatus 1 for an injection molding machine includes a first block 30 and a second block 40 between a first casing 10 and a second casing 20 disposed at both ends. And, a plurality of gas removal block 50 and the gas removal plate 60 is configured to be combined.

The first casing 10 includes a raw material supply pipe 13 in which a raw material for injection is supplied at the center thereof. The raw material supply pipe 13 is connected to the first raw material accommodating part 11 formed in the first casing 10. The first raw material accommodating part 11 is formed in the shape of a cone indented inwardly and gradually extends from the raw material supply pipe 13. The first block 30 is coupled to the first casing 10.

The first block 30 includes a cone-shaped first protrusion 41 protruding toward the first casing 10. The first protrusion 41 is formed in a cone shape and positioned inside the first raw material accommodating part 11 of the first casing 10. In this case, the first block 30 is completely in close contact with the first casing 10, and a space for accommodating the raw material for injection is formed between the first protrusion 41 and the first casing 10.

The first protrusion 41 is positioned inside the first raw material accommodating part 11 and serves to reduce the internal space of the first raw material accommodating part 11. Therefore, the injection raw material contained in the first raw material accommodating part 11 is relatively thinned to pass through the first block 30 through the hole 42 formed in the first protruding part 41.

In addition, the first block 30 is formed integrally with the first protrusion 41 and is formed of a metal having high thermal conductivity. The first protrusion 41 may quickly transfer heat supplied from the outside to the injection raw material contained in the first raw material accommodating part 11. Therefore, even if the raw material for injection is hardened inside the first raw material accommodating part 11, when the first block 30 is heated, the raw material for injection can be quickly melted and used again.

One side of the first block 30 is coupled to the first casing 10, and the other side of the first block 30 is coupled to the gas removal block 50. The gas removing block 50 is paired with the gas removing plate 60 to remove the gas inside the injection raw material. The degassing block 50 and the degassing plate 60 may be alternately arranged in succession. The gas removing block 50 and the gas removing plate 60 may adjust the size and the number according to the capacity of the injection machine.

Referring to FIG. 4, the gas removing block 50 includes a first raw material movement hole 51 through which injection material moves and a first gas exhaust path 54 through which gas moves. The first raw material movement hole 51 communicates with the raw material supply pipe 13 of the first casing 10 and the hole 32 of the first block 30. Therefore, the injection raw material is supplied to the first raw material moving hole 51 through the raw material supply pipe 13 and the hole 32 of the first block 30. The first raw material moving hole 51 communicates with the second raw material moving hole 61 of the gas removing plate 60.

The first gas exhaust passage 54 is a passage through which the gas removed from the injection raw material is discharged, and is formed to pass through the gas removal block 50 in parallel with the first raw material moving hole 51. The first gas exhaust passage 54 communicates with the second gas exhaust passage 62 formed in the gas removal plate 60. Therefore, the gas may be discharged to the outside through the first casing 10 by continuously moving the first gas exhaust passage 54 and the second gas exhaust passage 62.

On the other hand, the gas removal block 50 includes a gas discharge groove 53 formed adjacent to the first raw material moving hole 51. The gas discharge groove 53 is a place where the gas discharged from the injection raw material moving through the first raw material moving hole 51 temporarily collects. The gas discharge groove 53 is connected to the first gas exhaust passage 54. Therefore, gas is collected in the gas discharge groove 53 and discharged through the first gas exhaust passage 54.

A gap retaining portion 52 protruding in a ring shape is formed between the first raw material moving hole 51 and the gas discharge groove 53. The gap holding part 52 protrudes from the gas discharge groove 53 so as to form a fine gap 55 between the gas removing block 50 and the gas removing plate 60. However, the gap retaining portion 52 is located inside the upper end portion of the gas elimination plate 60 so as not to directly contact the gas elimination plate 60.

2 and 3 again, the gas removing plate 60 is coupled between the gas removing blocks 50. That is, as the gas removing block 50 and the gas removing plate 60 are alternately arranged, the gas removing plate 60 forms a structure coupled between the gas removing block 50. The gas removal plate 60 includes a second raw material movement hole 61 and a second gas exhaust passage 62. When the gas removing plate 60 overlaps with the gas removing block 50, the second raw material moving hole 61 communicates with the first raw material moving hole 51, and the second gas exhaust passage 62 exhausts the first gas. In communication with the furnace 54. Therefore, when the gas removing block 50 and the gas removing plate 60 are continuously disposed, the first raw material moving hole 51 and the second raw material moving hole 61 may be formed of the first block 30 and the second block ( A raw material flow path between the 40 is formed, and the first gas exhaust path 54 and the second gas exhaust path 62 form a gas flow path between the first block 30 and the second block 40. .

On the other hand, the second block 40 is disposed on the outer side of the gas removal plate 60 disposed in the outermost. The second block 40 includes a cone-shaped second protrusion 41 protruding toward the second casing 20. The second protrusion 41 is inserted into the second raw material accommodating portion 22 inside the second casing 20. The injection raw material passes through the 42 of the second protrusion 41 and is collected in the second raw material accommodating part 22 and injected through the nozzle 21.

The second protrusion 41 may transfer heat easily to a molten state even when the injection raw material is solidified inside the second raw material accommodating part 22.

The second casing 20 is coupled to the outside of the second block 40, the raw material discharge pipe 23 is formed in the center. The raw material discharge pipe 23 is connected to the nozzle 21 to inject the raw material for injection into the mold.

The first casing 10 and the second casing 20 expose the first block 30, the gas removing block 50, the gas removing plate 60, and the second block 40 interposed therebetween to the outside. And combine. That is, the first casing 10, the first block 30, the gas removing block 50, the gas removing plate 60, the second block 40, and the second casing 20 are arranged in a row to couple the bolts. Combined by 23. Therefore, the first block 30, the gas removing block 50, the gas removing plate 60 and the second block 40 are exposed to the outside as it is, the first block 30, the gas removing block 50 from the outside ), Heat can be quickly transferred to the raw material for injection when the heat is applied to the degassing plate 60 and the second block 40. The gas removal device 1 for the injection molding machine is formed in a structure capable of rapidly applying heat to the injection raw material, and thus has an advantage of resuming the injection process very quickly in a state in which the injection process is stopped.

Referring to FIG. 3, the injection raw material is supplied to the raw material supply pipe 13 and branched into the plurality of first raw material moving holes 51 and the second raw material moving holes 61 while passing through the first block 30. The injection raw material discharges the gas inside while passing through the gas removing block 50 and the gas removing plate 60. The raw material for injection is branched into the plurality of first raw material moving holes 51 and the second raw material moving holes 61, thereby contacting the minute gap 55 between the gas removing block 50 and the gas removing plate 60. The area can be increased so that gas can be discharged effectively.

In FIG. 3, the large arrow indicates the movement of the raw material for injection, and the small arrow indicates the movement path of the gas discharged from the raw material.

Hereinafter, a process of discharging gas from the raw material for injection will be described in detail with reference to FIG. 5.

5 is a schematic partial cross-sectional view for explaining a process of removing bubbles between the gas removal block and the gas removal plate.

The injection raw material M is branched in small amounts while passing through the first block 30 to sequentially pass through the first raw material supply hole 51 and the second raw material supply hole 61. At this time, the injection raw material M passes through the first raw material supply hole 51 and the second raw material supply hole 61 at a high temperature and high pressure in a molten state.

As described above, a minute gap 55 is formed between the gas removing block 50 and the gas removing plate 60. The width t of the fine gap 55 may be formed to 1 to 10 μm, and preferably 3 to 6 μm. The width t of the fine gap 55 may vary depending on the material, temperature, and pressure conditions of the raw material for injection.

The first raw material supply hole 51 and the second raw material supply hole 61 pass sequentially while the injection raw material M is at a high temperature and high pressure, and passes through the fine gap 55. The gas is discharged to the gas discharge groove 53 through the fine gap 55. That is, the fine gap 55 is not large enough to allow the width t to pass through the injection raw material M, and thus can discharge only the gas in the injection raw material M.

The injection raw material M passes through the plurality of fine gaps 55 and all the gases therein are removed.

Hereinafter, with reference to Figure 6 will be described in detail with respect to the injection gas removal apparatus according to another embodiment of the present invention.

6 is a perspective view of a gas removal apparatus for an injection molding machine according to another embodiment of the present invention.

The gas removal apparatus 1 for an injection molding machine according to another embodiment of the present invention is the same as that of the previous embodiment except that the exhaust pump 70 further includes a gas combustion unit 80 and a filter unit 90. Do. Therefore, the same configuration uses the same reference numerals and description thereof is omitted.

The gas removed from the injection raw material is discharged through the gas outlet 12 of the first casing 10. At this time, the exhaust pump 70 generates a negative pressure to suck the gas from the gas outlet 12. The exhaust pump 70 may effectively suck the gas inside the first gas exhaust passage 54 and the second gas exhaust passage 62, and the first gas exhaust passage 54 and the second gas exhaust passage 62 may be inhaled. A negative pressure is generated inside so that gas can be easily discharged from the injection raw material.

On the other hand, the gas combustion unit 80 is connected to the gas outlet 12 to burn the gas harmful to the human body. That is, the gas passes through the hot gas combustion unit 80 to burn harmful components to the human body, and finally passes through the filter unit 90 to finally remove the odorous components or harmful substances.

The gas combustion unit 80 may directly generate a flame to burn gas or heat using a heating wire. In addition, the filter unit 90 may remove fine particles using activated carbon or hepa filter, which can remove odors.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: Degassing Device for Injection Molding Machine
10: first casing 11: first raw material accommodating portion
12 gas outlet 20 second casing
21: nozzle 22: second raw material accommodating portion
30: first block 31: first protrusion
40: second block 41: first protrusion
50: gas removal block 51: first raw material moving hole
52: gap maintenance unit 53: gas discharge groove
54: first gas exhaust passage 60: gas removal plate
61: second raw material movement hole 62: second gas exhaust passage
70: exhaust pump 80: gas combustion unit
90: filter part

Claims (12)

A gas removal block having a first raw material moving hole through which the raw material for injection passes; And
Including a gas removal plate in close contact with the gas removal block and formed with a second raw material moving hole communicating with the first raw material moving hole,
The gas removal apparatus for the injection molding machine formed a fine gap between the first raw material moving hole and the second raw material moving hole. The method of claim 1,
The fine gap is a gas removal device for an injection molding machine having a width of 1 ~ 10㎛. The method of claim 1,
The gas removing block, the gas removing plate and the contact surface is formed in part of the gas removal device for injection machine formed gas discharge grooves in communication with the fine gap. The method of claim 3,
The gas removal block further comprises a first gas exhaust passage communicating with the gas discharge groove, the gas removal plate is a gas removal apparatus for an injection molding machine further comprises a second gas exhaust passage communicating with the first gas exhaust passage. 5. The method of claim 4,
Further comprising a first casing formed with a raw material supply pipe to which the injection raw material is supplied, and a second casing having a raw material discharge pipe through which the injection raw material is discharged,
At least one pair of the gas removing block and the gas removing plate are alternately disposed between the first casing and the second casing, the raw material supply pipe, the first raw material moving hole, the second raw material moving hole, and the raw material. Discharge pipe is a gas removal device for the injection machine is in communication with each other to sequentially move the injection raw material. The method of claim 5,
And a plurality of first raw material moving holes and the second raw material moving holes branched from the raw material supply pipe. The method of claim 5,
And a first block interposed between the first casing and the gas removing block and having a cone-shaped first protrusion protruding toward the first casing, wherein the first casing is indented to accommodate the first raw material. And a first protrusion is formed inside the first material accommodating part. The method of claim 7, wherein
The first block is formed in the first protrusion portion gas removal device for an injection molding machine further comprises a plurality of holes connected to the first raw material moving hole and the second raw material moving hole. In the fifth aspect,
A second block interposed between the second casing and the gas removing plate and having a cone-shaped second protrusion protruding toward the second casing, wherein the second casing is indented to accommodate a second raw material; And a second protrusion is formed inside the second material accommodating part. The method of claim 5,
The gas removing block and the gas removing plate is exposed to the outside of the first casing and the second casing gas removal apparatus for the injection molding machine. The method of claim 5,
A gas outlet formed in at least one of the first casing and the second casing and communicating with the first gas exhaust passage and the second gas exhaust passage;
An exhaust pump connected to the gas outlet and configured to suck gas inside the first gas exhaust passage and the second gas exhaust passage; And
And a gas combustion unit connected to the gas outlet to combust the gas. 12. The method of claim 11,
And a filter unit connected to the gas combustion unit to remove harmful substances contained in the burned gas.
KR1020120079603A 2012-07-20 2012-07-20 Apparatus of removing gas for injection molding machine KR20140011885A (en)

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Application Number Priority Date Filing Date Title
KR1020120079603A KR20140011885A (en) 2012-07-20 2012-07-20 Apparatus of removing gas for injection molding machine

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160131672A (en) * 2015-05-08 2016-11-16 (주)벤트코리아 Gas emission nozzle of injection mold
KR101690313B1 (en) * 2016-06-24 2016-12-27 김용범 Nozzle unit for injection molding machine and tar-discharging control system INCLUDING THE SAME
KR20180119060A (en) * 2017-04-24 2018-11-01 조성희 Gas emission structure of plastic injection nozzle
KR102000391B1 (en) 2018-03-07 2019-10-01 김용규 Gas emission nozzle and, eco-friendly gas purification system and method with thereof
KR102179745B1 (en) * 2019-05-16 2020-11-17 박용환 Gas eliminator nozzle assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160131672A (en) * 2015-05-08 2016-11-16 (주)벤트코리아 Gas emission nozzle of injection mold
KR101690313B1 (en) * 2016-06-24 2016-12-27 김용범 Nozzle unit for injection molding machine and tar-discharging control system INCLUDING THE SAME
KR20180119060A (en) * 2017-04-24 2018-11-01 조성희 Gas emission structure of plastic injection nozzle
KR102000391B1 (en) 2018-03-07 2019-10-01 김용규 Gas emission nozzle and, eco-friendly gas purification system and method with thereof
KR102179745B1 (en) * 2019-05-16 2020-11-17 박용환 Gas eliminator nozzle assembly

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