KR20160131672A

KR20160131672A - Gas emission nozzle of injection mold

Info

Publication number: KR20160131672A
Application number: KR1020150064581A
Authority: KR
Inventors: 정윤종
Original assignee: (주)벤트코리아
Priority date: 2015-05-08
Filing date: 2015-05-08
Publication date: 2016-11-16
Also published as: KR101687681B1

Abstract

The present invention relates to a gas removing nozzle of an injection mold capable of removing a gas contained in a molten resin before it is supplied to an injection mold and discharging the gas, comprising: a base on which a resin supply path is formed; A resin pressure reducing unit disposed in close contact with the base to reduce the resin pressure of the molten resin supplied through the resin supply path and having a plurality of resin transfer holes formed at the center thereof; A gas discharge unit provided in each of the plurality of resin transfer holes; A discharge head in which a resin discharge path is formed so as to discharge molten resin that has passed through the resin pressure reduction portion, and which is closely arranged to the resin pressure reduction portion; .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas removing nozzle of an injection mold, and more particularly, to a gas removing nozzle of an injection mold capable of removing a gas contained in a molten resin before being supplied to an injection mold.

Injection molding is a typical method for molding a thermoplastic resin. Injection molding produces a product by injecting molten resin into a mold. Therefore, the injection machine is equipped with a nozzle for injecting the molten resin into the mold.

The injection nozzle ensures that the molten resin is fed to the injection mold while being fed by means of a screw cylinder. Such injector nozzles have been proposed through Utility Model Publication No. 1990-4225 (hereinafter referred to as "draft design").

According to the design, the injector nozzle includes a body 10, a discharge head 20, a poppet 30, and a vent ring 40, as shown in Fig.

One end of the body 10 is connected to a cylinder (not shown) of the injection machine, and molten resin is supplied to the body 10 from the cylinder. The discharge head 20 is coupled to the other end of the body 10.

A molten resin passage 12 is formed in the body 10 and a foam 30 and a vent ring 40 are provided in the molten resin passage 12.

A vent ring 40 is fitted in the foam port 30 and a plurality of protrusions 42 protrudes radially from a side surface of the vent ring 40. Therefore, when the molten resin passes over the outer peripheral surface of the foam 30, the gas components contained in the molten resin are extracted through the space between the vent rings 40.

The gas exhaust hole 14 is formed from the inner peripheral surface to the outer peripheral surface of the body 10 and the extracted gas component is discharged to the outside of the body 10 through the gas exhaust hole 14. [

A discharge port (22) is formed at one end of the discharge head (20). The melted resin supplied to the molten resin passage 12 is supplied to the mold (not shown) through the discharge port 22 of the discharge head 20 through the outer peripheral surface of the foam 30.

According to the invention, however, the gas contained in the molten resin is discharged when the molten resin passes through the outer circumferential surface of the foam 30, but there is no constitution capable of effectively extracting the gas from the molten resin.

Therefore, the molten resin injected through the discharge port 22 contains a large amount of gas components, and product defects may be caused by these gas components.

Further, since the vent ring 40 does not effectively remove the gas components, a separate dryer is required to dry the gas components contained in the molten resin. Therefore, there is a problem that the equipment is complicated and the manufacturing cost becomes excessive.

Korean Patent No. 0822479

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a gas removal nozzle of an injection mold capable of significantly reducing the injection defective rate by allowing the gas contained in the molten resin to be discharged before being supplied to the injection mold There is a purpose.

In order to accomplish the above objects, the present invention provides a semiconductor device comprising: a base having a resin supply path formed at a central portion thereof; A resin pressure reducing unit disposed in close contact with the base to reduce the resin pressure of the molten resin supplied through the resin supply path and having a plurality of resin transfer holes formed at the center thereof; A gas discharge unit provided in each of the plurality of resin transfer holes; A discharge head in which a resin discharge path is formed so as to discharge molten resin that has passed through the resin pressure reduction portion, and which is closely arranged to the resin pressure reduction portion; .

A plurality of bolt fastening holes are formed on the same axis and fixed to the base, the resin pressure reducing section, and the discharge head.

Here, the resin pressure reducing section may include a body having a first resin transfer hole, a first decompression piece and a second decompression piece having a second resin transfer hole and a third resin transfer hole formed therein, and the first and second pressure- A first resin guide cone and a second resin guide cone are formed so as to disperse the movement path of the molten resin to reduce the resin pressure.

The gas discharge portion includes a pressure reducing pin and a washer fitted to the pressure reducing pin, and a locking protrusion is formed in the third resin moving hole so as to be fitted in a retaining groove formed in the circumferential surface of the washer.

The pressure reducing pin has a plurality of protrusions formed along a peripheral surface thereof, and the gas guide groove is formed in the washer.

The first pressure reducing piece and the second pressure reducing piece are formed with an air injection groove and a gas discharge groove, and a circumferential surface is formed with an air injection hole and a gas discharge hole to communicate with the air injection groove and the gas discharge groove.

The plurality of projecting projections may be formed on different axes, and the second resin transfer hole and the third resin transfer hole may be formed through the first resin guide cone and the second resin guide cone.

The gas removing nozzle of the injection mold according to the embodiment of the present invention is capable of discharging the gas contained in the molten resin before being supplied to the injection mold so that it is possible to produce high quality articles.

FIG. 1 is a perspective view showing a nozzle assembly for a conventional injector being disassembled. FIG.
2 is a perspective view of a gas removal nozzle of an injection mold according to an embodiment of the present invention.
3 is an exploded perspective view of a gas removal nozzle of an injection mold according to an embodiment of the present invention.
4 is a cross-sectional view of a degassing nozzle of an injection mold according to an embodiment of the present invention.
5 is an operational view of the degassing nozzle of an injection mold according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

FIG. 2 is a perspective view of a degassing nozzle of an injection mold according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a degassing nozzle of an injection mold according to an embodiment of the present invention, FIG. FIG. 5 is an operational state diagram of a gas removing nozzle of an injection mold according to an embodiment of the present invention. FIG.

2 to 4, the gas removal nozzle 1000 of the injection mold according to the embodiment of the present invention is disposed in close contact with the base 100 and the base 100, and has a plurality of resin transfer holes formed at the center thereof The resin discharge passage 420 is formed so as to discharge the molten resin that has passed through the resin discharge portion 300 and the resin discharge portion 300 provided in the plurality of resin transfer holes, And a discharge head 400 closely arranged with the reduction section 300.

The base 100 is configured to be screwed into the resin supply device (not shown) through a screw connection, and the connection piece 120 is formed at one side of the screwed connection part 110. The connecting piece 120 has a relatively larger area than the threaded portion.

In the connecting piece 120, a plurality of bolt holes 130 are formed at predetermined intervals along the circumferential direction. A resin supply path 140 is formed at the center of the connecting piece 120 so that the molten resin M supplied from the resin supply device can be moved.

The resin supply passage 140 has a corn shape having a larger inner diameter at the central portion where the connecting piece 120 is formed than the inner diameter of the threaded portion 110.

Further, the resin pressure reducing part 200 is disposed in close contact with the connecting piece 120 of the base. The resin pressure reduction unit 200 is configured to reduce the resin pressure of the molten resin M supplied through the resin supply path 140, and a plurality of resin transfer holes 214, 221 and 232 are formed at the central portion.

The resin pressure reducing unit 200 includes a body 210 having a first resin transfer hole 214 and a first pressure reducing piece 220 having a second resin transfer hole 221 and a third resin transfer hole 232, And a second pressure sensitive piece 230. The first pressure sensitive piece 220 and the second pressure sensitive piece 230 are provided with a first resin guide cone (not shown) for dispersing the moving path of the molten resin M, The second resin guide cone 240 and the second resin guide cone 240 are formed.

The body 210 is positioned between the first pressure-reducing piece 220 and the second pressure-reducing piece 230. The first pressure-reducing piece 220 and the second pressure- (230). &Lt; / RTI >

In the case of the first resin transfer hole 214, a bolt fastening hole 130 formed in the connecting piece 120 of the base, And are formed on the same axis line.

The first pressure-reducing piece 220 and the second pressure-reducing piece 230 which are in close contact with both sides of the body 210 have a very similar shape when viewed in their entirety.

That is, bolt fastening holes 225 are formed in the first pressure reducing piece 220 along the circumferential direction. The bolt fastening holes 225 are formed on the same axis as the bolt fastening holes 130 of the body.

A first resin guide cone 222 is formed at the center of the first pressure-reducing piece 220. The first resin guide cone 222 disperses the movement path of the molten resin M passing through the resin supply path 140 of the base to reduce the resin pressure.

In addition, a second resin transfer hole 221 is formed in the first pressure-reducing piece 220. A plurality of second resin transfer holes 221 are formed inside the bolt fastening holes 225 formed in the first pressure reducing piece 220 and the first resin guide cone 222 and the first resin guide cone 222, respectively.

At this time, the first pressure-reducing piece 220 is provided with an air injection groove 223 having a predetermined depth as a groove having a predetermined depth. The air inlet groove 223 communicates with the air inlet hole 224 formed in the peripheral surface of the first pressure reducing piece 220.

Therefore, when air is injected into the first pressure-reducing piece 220 through the air injection hole 224, the air is moved along the air injection groove 223, And proceeds toward the first resin transfer hole 214 of the body together with the resin (M).

The second pressure-reducing piece 230 is in close contact with the opposite side of the body 210 to which the first pressure-reducing piece 220 is closely attached. A plurality of bolt fastening holes 250 are formed along the circumferential direction and a plurality of third resin transfer holes 232 are formed inside the second pressure reducing piece 230 in the same manner as the first pressure reducing piece 220 .

A second resin guide cone 240 is attached to a central portion of the second pressure-reducing piece 230. The second pressure reducing piece 230 is formed with a gas discharge groove 260 having a predetermined depth as a groove having a predetermined depth.

The gas exhaust groove 260 may be formed in the same or similar pattern as the air injection groove 223 and the gas exhaust hole 270 may be formed on the peripheral surface to communicate with the gas exhaust groove 260.

At this time, a plurality of locking protrusions 233 protrude from the third resin moving hole 232 of the second decompression piece.

That is, the second pressure-reducing piece 230 is different from the first pressure-reducing piece 220 in that a locking projection 233 is formed inside the third resin transfer hole 232 in the constitutional view. The plurality of locking projections 233 serve to support the decompression pins 310, which will be described later, from being moved by the molten resin M.

Meanwhile, a gas discharge unit 300 is provided between the first resin transfer hole 214 of the body and the third resin transfer hole 232 of the second decompression piece.

The gas discharge portion 300 includes a pressure reducing pin 310 and a washer 320 fitted to the pressure reducing pin 310. The pressure reducing pin 310 has a plurality of protrusions 312 formed along the peripheral surface thereof. Each of the protrusions 312 is not formed on the same axial line but is formed at a predetermined angle.

The tip of the decompression pin 310 is formed so as to taper so as to reduce the resin pressure when the molten resin M moves.

The pressure reducing pin 310 is installed between the body 210 and the second pressure reducing pin 230 in a state of being fitted to the washer 320 when installed.

The washer 320 is fitted in the first resin transfer hole 214 of the body and has a plurality of grooves 322 formed on the peripheral surface thereof.

When the decompression pin 310 is fitted into the washer 320, the protrusion protrusion 312 of the decompression pin is in close contact with the inner circumferential surface of the washer 320 and a predetermined space is provided between the decompression pin 310 and the washer 320 So that the molten resin M can be moved through this space.

Further, a gas guide groove 324 is formed in the washer 320. The gas guide groove 324 is formed to guide the gas contained in the molten resin M to the gas discharge groove 260 and discharge the gas in the washer 320 during the passage of the molten resin M. [

The resin discharge path 420 is formed on the outside of the resin pressure reducing part 200 so as to discharge the molten resin M that has passed through the resin pressure reducing part 200 and is in close contact with the resin pressure- The discharge head 400 is installed.

The discharge head 400 has a plurality of bolt fastening holes 410 formed along the outer circumferential surface thereof and a resin discharge path 420 formed at the center thereof to have a corn shape. The resin discharge path 420 penetrates through the resin discharge path 420 with a predetermined diameter so that the molten resin can be discharged.

Bolts 500 having a length penetrating through the bolts are formed in the bolt fastening holes 130, 212, 225, 250 and 410 respectively formed in the base 100, the resin pressure reduction part 200 and the discharge head 400, .

Hereinafter, the operation of the gas removal nozzle of the injection mold according to the embodiment of the present invention will be described.

Referring to Fig. 5, when the molten resin M is supplied from the resin supply device, the molten resin M flows into the resin supply path 140 of the base.

The molten resin M thus introduced is dispersed along the outer surface of the first resin guide cone 222 located in the resin supply path 140 and the first resin guide cone 222 and the second resin And enters the moving hole 221.

At this time, external air is injected into the air injection hole 224 of the first pressure-reducing part, and the injected external air moves to the second resin transfer hole 221 along the air injection groove 223.

The air moved to the second resin transfer hole 221 passes through the first resin transfer hole 214 of the body together with the molten resin M. [

The molten resin M passing through the first resin transfer hole 214 is advanced to the third resin transfer hole 232 of the second decompression piece while the resin pressure is reduced again by the decompression pin 310 of the gas discharge portion.

When the resin pressure is reduced by the decompression pin 310, the molten resin M is transferred between the decompression fin 310 and the washer 320, between the washer 320 and the body 210, In this process, the gas contained in the molten resin M starts to be discharged to the outside along the gas guide groove 324 of the washer.

The gas thus moved into the gas guide groove 324 continues along the gas discharge groove 260 and is discharged through the gas discharge hole 270.

Accordingly, the gas contained in the molten resin M can be discharged to the outside through the gas discharging unit 300, and only the molten resin is transferred to the resin discharge path 420 of the discharge head.

The molten resin (M) transferred to the resin discharge path (420) is injected into the injection mold through the discharge portion of the discharge head (400) by the resin pressure.

Therefore, the gas removing nozzle 1000 of the injection mold according to the embodiment of the present invention can discharge the gas contained in the molten resin M in advance before reaching the injection mold, Can be injected into the injection mold, thereby making it possible to produce an injection molded article of high quality.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Base
110:
120: Connection
130: Bolt tightening ball
140: resin supply path
200: Hydraulic pressure reduction part
210: Body
212: Bolt tightening ball
214: first resin transfer hole
220: first decompression piece
221: second resin moving ball
222: first resin guide cone
223: air injection groove
224: air injection ball
225: Bolt tightening ball
230: second pressure reducing piece
232: third resin transfer hole
233:
240: second resin guide cone
250: Bolt tightening ball
260: gas discharge groove
270: gas discharge hole
300: gas discharge portion
310: Decompression pin
312: protrusion projection
320: Washer
322: Home
324: gas guide groove
400: Discharge head
410: Bolt fastener
420: resin discharge path
500: Bolt
1000: Gas removal nozzle

Claims

A base having a resin supply path formed at a central portion thereof;
A resin pressure reducing unit disposed in close contact with the base to reduce the resin pressure of the molten resin supplied through the resin supply path and having a plurality of resin transfer holes formed at the center thereof;
A gas discharge unit provided in each of the plurality of resin transfer holes; And
A discharge head in which a resin discharge passage is formed so as to discharge the molten resin that has passed through the resin pressure reduction portion, and which is disposed in close contact with the resin pressure reduction portion; And a gas outlet.

The method according to claim 1,
Wherein a plurality of bolt fastening holes are formed on the same axis in the base, the resin pressure reduction portion, and the discharge head.

The method according to claim 1,
Wherein the resin pressure reducing section includes a body having a first resin transfer hole, a first decompression piece and a second decompression piece having a second resin transfer hole and a third resin transfer hole,
And a first resin guide cone and a second resin guide cone are formed in the first pressure reducing piece and the second pressure reducing piece so as to disperse the movement path of the molten resin to reduce the resin pressure.

The method according to claim 1,
Wherein the gas discharge portion includes a pressure reducing pin and a washer fitted to the pressure reducing pin.

The method according to claim 3 or 4,
And the third resin transfer hole is provided with a locking protrusion so as to be fitted in a locking groove formed in the circumferential surface of the washer.

5. The method of claim 4,
Wherein the pressure-reducing pin has a plurality of protrusions along the peripheral surface thereof.

5. The method of claim 4,
And the gas guide groove is formed in the washer.

The method of claim 3,
Wherein the first depressurizing piece and the second depressurizing piece are provided with an air injection groove and a gas discharge groove, and an air injection hole and a gas discharge hole are formed on the peripheral surface so as to communicate with the air injection groove and the gas discharge groove, .

The method according to claim 6,
And the plurality of protrusions are formed on different axial lines, respectively.

The method of claim 3,
And the second resin transfer hole and the third resin transfer hole are formed through the first resin guide cone and the second resin guide cone.