KR101278839B1 - Valve hot runner system for injection molding machine - Google Patents

Abstract

The present invention relates to a valve hot runner device of an injection mold.
The present invention is the upper block 100 having a resin injection nozzle 110, and the intermediate block 120 is connected to the resin injection nozzle 110 and the Y-shaped resin flow passage 121 is formed therein, A ceramic pin guide bushing 135 is placed therein so that the lower end of the valve pin 132 is inserted into the ceramic pin guide bushing 135 so that the lower end of the valve pin 132 is in close contact with or separated from the ceramic pin guide bushing 135. An upper mold (A) including a lower block (130) made of a nozzle assembly (131) in which a thermally conductive ceramic nozzle (134) is accommodated and installed inside; And a mold cavity 145 and the mold installed at a lower portion of the nozzle assembly 131 so that the support block 140 is disposed to be in close contact or detachable to face the thermally conductive ceramic nozzle 134 of the lower block 130. A lower mold (B) in which an ejector pin 143 for supporting the cavity 145 is placed directly below the mold cavity 145; In the injection molding valve hot runner device,
The installation space 122 is provided in the intermediate block 120 in which the upper end of the valve pin 132 is disposed, and the pneumatic opening line 123a and pneumatically communicated to one side and the other side of the installation space 122, respectively. A closing line 123b is formed, and is connected to the pneumatic opening line 123a and the pneumatic closing line 123b from the inside of the installation space 122 to the top thereof, and to the bottom of the upper end of the valve pin 132. The valve pin driving unit 200 is installed so that the lifting operation of the valve pin 132 is made by pneumatic pressure.

Description

Valve hot runner system for injection molding {Valve hot runner system for injection molding machine}

The present invention compares the valve pin operation structure of the valve hot runner system configured to be heated on the runner passing through the resin injection nozzle with a simple structure, and a pneumatic type that can be operated at a high pressure with a simple structure. The present invention relates to a valve hot runner device of an injection mold that has been improved to a lifting structure so that the operation of the valve pin can be made more accurately and stably.

Valve hot runner system is designed to improve the production and quality by mounting on the plastic mold, has the advantage of advantages in terms of product output and cost reduction.

This valve hot runner system performs injection molding by heating a heater mounted on a metal valve hot, produces air using a compressor, and finally opens a furnace when the valve pin is operated using the produced air, and injection is completed. When the valve pin works, it blocks the flow of resin. In order to produce the product, the valve pin moves linearly and must be operated repeatedly every time injection molding is performed.However, at least one device is necessary to reduce trouble and material loss when forming a plurality of cavities to facilitate product molding. However, many valve caps must operate equally precisely and must be closed and opened repeatedly.

However, since pressure control is not possible due to the fixed pressure due to the structure using the compressor and the air boosting device, a pressure booster is used when the air is operated.

When the pressure riser is used, a pressure of 40k or less can be easily obtained, but it is difficult to raise the pressure beyond that. Normally 45k is required to operate the valve in case of overload, but if one fails to operate due to lack of pressure, the product will be defective. In this case, the work is interrupted, the mold must be separated from the machine, disassembled, and repaired for a long time, and the whole or part of the valve hat may be replaced, which may lead to problems in productivity and delivery time, resulting in loss of reliability, labor cost, and cost. Upside factors occur.

Usually, this is because the whole metal is formed in the valve hat mold and the resin for molding has a temperature of 150 to 400 or more. Due to the severe variation in thermal expansion and contraction due to pressure, the metal and metal are severely rubbed during repetitive movement, which not only prevents the operation of the valve pin but also generates high heat due to functional friction in the valve hat, which must be operated at high temperature. Hardness is lowered and the surface of the friction part is roughened, which lowers the operation, and high stress phenomenon occurs in the resin and stress caused by interference with each other, which may cause the valve pin to stop working.

Due to various problems described above, the applicant has devised a patent application No. 2009-62350, "Injection mold hot runner device".

The first application includes a plate assembly having a sprue bushing, a heater for heating the resin introduced from the sprue bushing, and passage holes for supplying the resin to a plurality of mold cavities; A multistage nozzle assembly inserted into the plate assembly in a vertical direction; A hollow shaft disposed coaxially with the nozzle assembly and equipped with a driving pulley to receive rotational force from a linearly moving drive cylinder; It is formed through the hollow shaft and the nozzle assembly extending to the mold cavity, is assembled by the inner circumferential surface and the key of the hollow shaft to limit the relative rotation with respect to the hollow shaft, the first screw thread is formed in one section of the outer circumferential surface A valve pin configured to block or open a gate formed at an end of the nozzle assembly by vertical movement; And a second screw thread corresponding to the first screw thread on an inner circumferential surface thereof, and a pin guide for elevating the valve pin as the valve pin is rotated.

The above-mentioned application can obtain the opening and closing structure of the valve pin with low resistance and low friction by the hollow shaft, the valve pin and the pin guide, and the first screw thread of the valve pin and the second screw thread of the pin guide are rotated up and down of the valve pin. In addition to the advantages of smooth movement and precise control, a plurality of valve pins can be rotated forward and reverse by a single drive cylinder and chain, thereby increasing productivity and yield.

In addition, the structure of the sprue and runner is formed to be branched at the shortest distance from the center so as to obstruct the flow of resin and minimize the occurrence of a structure that can generate gas, thereby preventing material discoloration due to overheating due to the stagnation of resin. It was possible to realize quality at all times.

In addition, by forming a screw groove at the end of the valve pin it was possible to easily discharge the gas to the outside when the molding is completed and to prevent the gas inflow of the product during injection molding to minimize the defects.

In addition, by forming a portion exposed to heat and abrasion with a ceramic material, it is possible to minimize gaps due to thermal expansion, thereby preventing hardness degradation and preventing backflow and outflow of the resin.

However, the following problems were exposed in the process of implementing the above-mentioned application.

First, the assembly structure of the valve drive unit provided for the lifting of the valve pin is very complicated and there is a problem in that the application cost is excessively consumed due to the excessive number of components.

In addition, since the lifting mechanism of the valve pin tends to be unstable as the linkage structure is formed through the chain, a vibration phenomenon occurs between the movement of the valve pin.

In particular, there is a limit in setting the operating pressure of the valve pin to reduce the defective rate of the injection molding, as well as the lack of cooling means in the valve drive unit itself there is a problem that accelerated damage of the components due to heat generation.

The present invention compares the valve pin operation structure of the valve hot runner system configured to be heated on the runner passing through the resin injection nozzle with a simple structure, and a pneumatic type that can be operated at a high pressure with a simple structure. The emphasis is on improving the lifting structure so that the valve pin can be operated more accurately and stably.

The present invention provides an upper block having a resin injection nozzle, an intermediate block connected to the resin injection nozzle and having a Y-shaped resin flow hole formed therein, and a ceramic pin guide bushing formed therein, thereby providing a ceramic pin guide bushing. An upper mold including a lower block formed of a nozzle assembly in which a lower end portion of the valve pin is inserted into the inner side of the valve pin so that the lower end portion of the valve pin is closely attached to or separated from the valve pin; And a mold cavity disposed below the nozzle assembly to be in close contact with or detachable from the lower conductive ceramic nozzle of the lower block, and an ejector pin for supporting the mold cavity directly below the mold cavity. Lower mold; In the injection molding valve hot runner device,

By providing an installation space portion in the middle block in which the upper end of the valve pin is arranged to form a pneumatic opening line and a pneumatic closing line to the outside on one side and the other side inside the installation space, respectively, from the inside of the installation space portion to the top An injection mold valve, which is connected to a pneumatic opening line and a pneumatic closing line, and has a valve pin driving unit connected to an upper end of the valve pin so that the lifting and lowering operation of the valve pin can be performed by pneumatic pressure. It is intended to achieve the above object by providing a hot runner device.

The present invention provides a complex drive structure that converts the linear motion of the drive cylinder into a rotational motion and converts it back into a vertical motion of the valve pin operation structure in the valve hot runner system configured to be heated on the runner passed through the resin injection nozzle. It is possible to open and close the valve pin more precisely and reliably only by lifting up and down the valve pin drive unit.

In addition, as the injection molding is possible by precisely operating the valve pins at the time of injection molding, the malfunction of the valve pins can be completely eliminated without the microscopic phenomenon caused by the lack of pressure.

In addition, since the cooling groove is integrally formed in the entire body of the valve pin driving unit, the high temperature generated from the mold during injection molding does not affect the valve pin driving unit, thereby preventing the thermal deformation of the packing in the valve pin driving unit. There is an advantage that can be prevented.

1 is an overall configuration of a valve hot runner device for showing the pneumatic structure of the valve pin drive unit according to the present invention
Figure 2 is an overall configuration of the valve hot runner device for showing the cooling structure of the valve pin drive unit according to the present invention
Figure 3 is an exploded perspective view of the valve pin drive unit according to the present invention
Figure 4 is a cross-sectional configuration of the valve pin driving unit in an elevated state according to the present invention
5 is a cross-sectional view of a valve pin driving unit in a lowered state according to the present invention;
Figure 6 is a cross-sectional view showing a cooling structure of the valve pin drive unit according to the present invention
Figure 7 is a bottom configuration of the cover member according to the present invention
Figure 8 is a schematic plan view showing the pneumatic structure and the cooling structure of the valve pin drive unit according to the present invention at the same time

Hereinafter, a preferred embodiment of the valve hot runner device of the injection mold according to the present invention will be described.

The present invention is the upper block 100 having a resin injection nozzle 110, and the intermediate block 120 is connected to the resin injection nozzle 110 and the Y-shaped resin flow passage 121 is formed therein, A ceramic pin guide bushing 135 is placed therein so that the lower end of the valve pin 132 is inserted into the ceramic pin guide bushing 135 so that the lower end of the valve pin 132 is in close contact with or separated from the ceramic pin guide bushing 135. An upper mold (A) including a lower block (130) made of a nozzle assembly (131) in which a thermally conductive ceramic nozzle (134) is accommodated and installed inside; And a mold cavity 145 and the mold installed at a lower portion of the nozzle assembly 131 so that the support block 140 is disposed to be in close contact or detachable to face the thermally conductive ceramic nozzle 134 of the lower block 130. A lower mold (B) in which an ejector pin 143 for supporting the cavity 145 is placed directly below the mold cavity 145; In the injection molding valve hot runner device,

The installation space 122 is provided in the intermediate block 120 in which the upper end of the valve pin 132 is disposed, and the pneumatic opening line 123a and pneumatically communicated to one side and the other side of the installation space 122, respectively. A closing line 123b is formed, and is connected to the pneumatic opening line 123a and the pneumatic closing line 123b from the inside of the installation space 122 to the top thereof, and to the bottom of the upper end of the valve pin 132. The valve pin driving unit 200 is installed so that the lifting operation of the valve pin 132 is made by pneumatic pressure.

The valve pin driving unit 200 has an operating center 211 provided inside the center of the upper surface thereof, and at the same time, a fixing groove 213 around the operating chamber 211 and the operating chamber 211 at the center of the bottom surface thereof. A through-hole 212 is formed to be connected to the body 210 is connected to the lower portion of the operating chamber 211 in the form of a declining guide passage 214 on one side,

Cylindrical cover 260 is installed on the outer peripheral surface of the body 210,

Screws 241 are formed on the top and bottom, respectively, the shaft 240 is inserted into the lower portion of the through-hole 212 of the body 210, and

A screw hole 231 is formed at the center of the bottom to fasten the upper threaded portion 241 of the shaft 240, and the wing 232 is formed on the outer circumferential surface at equal intervals, and is packed between the wing portions 232. The piston member 230 is provided with a groove 233,

It is installed in close contact with the opening portion of the body 210 and the fixing hole 223 is formed on the upper surface and coincides with the fixing groove 213 of the body 210 and is disposed on the upper surface side of the piston member 230 on one side and the other side of the outer peripheral surface An upward flow path 222 connected to the flow path 221 and the upward guide flow path 214 of the body 210 is formed at a right angle to cover the cover member 220 connected to the hydraulic opening line 123a and the hydraulic closing line 123b, respectively. )Wow,

A spiral groove 252 is formed in the center of the upper surface to enable the lower threaded portion 241 of the shaft 240 drawn out through the through hole 212 of the body 210 and an upper end of the valve pin 132 in the center of the bottom surface. Insertion groove 251 is formed to be inserted and the connection hole 254 for fixing the fastening hole 253 and the valve pin 132 for fixing the screw portion 241 of the shaft 240 on one side top and bottom of the outer peripheral surface It is configured to include a holder 250 is formed.

In addition, the present invention is the pneumatic opening formed in the intermediate block 120 so that the valve pin drive unit 200 accommodated in the installation space portion 122 of the intermediate block 120 is not affected by the high heat generated in the mold. The coolant input line 124a and the coolant discharge line 124b are respectively formed at positions orthogonal to the line 123a and the pneumatic closing line 123b, and the cover member 220 is the coolant input line 124a and the coolant discharge line. The cooling water passage 224 is formed to face the 124b and the body 210 forms a cooling groove 216 on the outer circumferential surface thereof, and is connected to the cooling water input line 124a on one side of the upper surface of the body 210. And at the same time to form a cooling water inflow passage 215a communicating with the lower end of the cooling groove 216, while being connected to the cooling water discharge line 124b on the opposite side of the cooling water inflow passage 215a. Cooling water discharge passage (215b) in communication with the upper end of the And Castle.

The cooling groove 216 of the body 210 is formed in a spiral structure so that the cooling water supplied to the cooling water inflow passage 215a naturally passes through the entire outer circumferential surface of the body 210.

Accompanying drawings, as shown in Figure 1, the valve hot runner device according to the present invention can be largely divided into upper mold (A) and lower mold (B).

The upper mold (A) is an upper block 100 having a resin injection nozzle 110, and an intermediate block connected to the resin injection nozzle 110 and having a Y-shaped resin flow hole 121 formed therein ( 120 and a ceramic pin guide bushing 135 is inserted therein so that the lower half of the valve pin 132 is inserted into the ceramic pin guide bushing 135 so as to be lifted and lowered at the same time. The upper mold (A) made of a nozzle assembly 131 is installed, which is installed in close contact with or separated from the thermally conductive ceramic nozzle 134,

The lower mold (B) is provided with a support block 140 disposed below the nozzle assembly 131 so as to be in close contact with or detachable from the thermally conductive ceramic nozzle 134 of the lower block 130. 145 and the ejector pin 143 for supporting the mold cavity 145 are placed in the structure directly below the mold cavity 145.

The reason for adopting the Y-shaped resin flow hole 121 formed to be drawn into the nozzle assembly 131 from the resin injection nozzle 110 is described in detail in the patent application No. 2009-62350, which is the applicant's prior application. This is because the conventional valve hot runner system can solve the problem that the resin is not evenly distributed, the carbonization problem of the resin, etc. due to the difference in the path length of the black spot generation and the distribution of the resin due to the stagnation of the resin.

In addition, the resin is supplied from the guide pin 142, the eject pin 143, the heater 133, and the resin flow hole 121 which can be seen as basic components in the injection mold, so that the resin can flow in the vertical direction. The nozzle assembly 131 is configured in the lower block 130,

Components such as the ceramic pin guide bushing 135, the thermally conductive ceramic nozzle 134, and the mold cavity 145 provided to prevent the backflow of the resin and to allow the resin channels to be inclinedly joined are maintained as they are.

However, the present invention is a means for the lifting operation of the valve pin 132 is to convert the linear movement of the drive cylinder to the rotational operation and to avoid the complex drive structure that converts it back to the vertical movement of the valve pin drive unit 200 The valve pin 132 can be opened and closed simply by lifting.

First, the present invention provides an installation space 122 in an intermediate block 120 in which the upper end of the valve pin 132 is disposed, and opens a pneumatic opening line 123a to the outside on one side and the other side of the installation space 122, respectively. ) And a pneumatic closing line 123b.

The pneumatic opening line 123a and the pneumatic closing line 123b selectively supply the pneumatic pressure to the inside of the valve pin driving unit 200 so that the piston member 230 internally installed in the body 210 of the valve pin driving unit 200. Will be formed to lift).

The packing groove 233 provided between the wing 232 and the wing 232 of the piston member 230 is a well-known packing that can be applied to the hydraulic cylinder is applied to the pneumatic pump (not shown) ) May also be required.

The largest installation purpose of the valve pin drive unit 200 is to solve the malfunction of the valve pin (132). That is because the valve pin drive unit 200 has a structure that is intuitively lifted by the supply of air.

When the valve pin driving unit is applied to the valve hot runner device, cooling is smoothly performed, thereby preventing air leakage due to deformation of the packing, and it is possible to solve the valve malfunction even when using a high pressure. Even fine phenomena can easily be overcome to minimize the defect rate of the product.

Referring to the assembly structure of the valve pin drive unit 200 as follows. As shown in FIG. 3, the valve pin driving unit 200 includes a body 210, a cover member 220, a piston member 230, a shaft 240, a holder 250, and a cover ( 260).

First, one side of the shaft 240 is inserted into the through-hole 212 of the provided body 210, while the opposite threaded portion 241 is fastened to the screw hole 231 of the piston member 230. ) Deeply inserted into the operating chamber 211 of the body 210 and then to a wrench bolt (not shown) in a state in which the fixing hole of the cover member 220 provided matches the fixing groove 213 of the body 210. In this case, the downward flow path 221 must be exactly matched with the rising guide flow path 214 formed in the body 210 in the state of being in natural communication with the operation chamber 211 or the rising flow path 222. Of course, it is desirable to apply a packing to the joint to ensure oil tightness.

When the body 210 is placed in the sealed state as described above, the threaded portion 241 drawn out through the through hole 212 of the body 210 is fastened to the spiral groove 252 of the holder 250, and then the holder 250. In order to prevent loosening of the fastening bolt (not shown) to the fastening hole 253 of the holder 250 to firmly fix the holder 250, and then to the valve groove (251) in the cutting groove 251 of the holder 250 Insert the upper end of the 132 and closely connect with a known fastening element, etc., and then insert the valve pin 132 into the ceramic pin guide bushing 135 of the nozzle assembly 131, and the valve pin driving unit 200 is intermediate. The installation of the valve pin driving unit 200 according to the present invention is to be completed by mounting the mounting space 122 of the block 120.

When the valve pin 132 is lowered, the lower end contacts the mold cavity 145 to block or open the gate formed at the end of the nozzle assembly 131, and the gas is automatically provided through a screw groove formed separately at the lower end. It is to be discharged to minimize the occurrence of product defects by the inflow of gas during molding.

4 is a state in which the valve pin 132 is raised and FIG. 5 is a state in which the valve pin 132 is lowered.

Injection molding is the first injection of the resin into the resin injection nozzle 110 and sent to the Y-shaped resin flow hole 121, the resin is supplied toward the lower end of the ceramic pin guide bushing 135 at this time pneumatic opening line ( Pneumatic pressure is supplied into the operating chamber 211 of the body 210 through 123a) and the downward flow passage 221 to push the piston member 230 downward. The downward movement of the piston member 230 pushes the valve pin 132 connected to the shaft 240 and the holder 250 downward, and then the lower end of the valve pin 132 is a thermally conductive ceramic nozzle 134. At the same time to be in close contact with the mold cavity 145 to mold a predetermined product.

When the molding of the product is completed as described above, this time through the pneumatic closing line (123b) and the rising passage 222, the pneumatic pressure is supplied into the operating chamber 211 of the body 210, the piston member 230 upwards Boosted. The upward movement of the piston member 230 pushes the valve pin 132 connected to the shaft 240 and the holder 250 upwards, and then the lower end of the valve pin 132 is a thermally conductive ceramic nozzle 134. At the same time, they are separated from the process and placed in standby for forming new products.

Meanwhile, as shown in FIG. 6, the present invention has a cooling structure for preventing the valve pin driving unit 200 accommodated and installed in the installation space portion 122 of the intermediate block 120 from being affected by the high temperature generated in the mold. have.

The cooling structure has a cooling member input line 124a and a cooling water discharge line 124b at positions orthogonal to the pneumatic opening line 123a and the pneumatic closing line 123b formed in the intermediate block 120, and then cover member ( On the 220 side, the cooling water input line 124a and the cooling water discharge line 124b are formed to face the cooling water passage 224.

When the cooling water passage 224 is formed in the cover member 220, the body 210 has a cooling groove 216 formed on an entire outer circumferential surface thereof, and the cooling water input line 124a is formed on one side of the upper surface of the body 210. And a cooling water inflow passage 215a connected to the lower end of the cooling groove 216 and connected to the cabinet water discharge line 124b on the opposite side of the cooling water inflow passage 215a and at the same time a cooling groove ( The cooling water discharge passage 215b is formed in communication with the upper end of the 216.

When the cooling structure is provided, the cooling water supplied through the cooling water input line 124a is supplied to the cooling water inflow passage 215a of the body 210 through the cooling water passage 224 formed in the cover member 220 and at the same time a spiral structure. The cooling water discharge passage 215b and the cooling water passage 224 and the intermediate block at the same time as the cooling water of the valve pin drive unit 200 is superheated in the course of the natural rotational movement to the lower portion along the cooling groove 216 made of By repeatedly circulating the process exiting to the cooling water discharge line 124b of 120, the valve pin drive unit 200 is capable of performing a highly stable repetitive operation without being affected by the high temperature of the mold.

In addition, the present invention forms a vacuum hole 146 in the support block 140 of the lower mold (B) and the guide block provided with a packing (P1) and the packing (P2) in the lower half of the ejector pin (143) (144) and the packing (P3) respectively installed on the upper surface of the mold slide 141 is configured so that the inside is in a vacuum state when the mold is matched for injection, the inside of the mold registration patent application 2009-62349 Ho, “Vacuum cylinder device through hydraulic cylinder” can be used to help to improve the quality of products by not only securing stability between injections but also reducing injection pressure during injection molding. do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Is also within the scope of protection of the present invention.

100: upper block 110: resin injection nozzle
120: intermediate block 121: resin euro hole
122: installation space 123a: pneumatic opening line
123b: pneumatic closing line 124a: cooling water input line
124b: cooling water discharge line 130: lower block
131: nozzle assembly 132: valve pin
133: heater 134: thermally conductive ceramic nozzle
135 ceramic pin guide bushing 140 support block
141: mold slide 142: guide pin
143: ejector pin 144: guide block
145: mold cavity 146: vacuum hole
200: valve pin drive unit 210: body
211: operating room 212: through hole
213: fixed groove 214: ascent guide flow path
215a: Cooling water inflow passage 215b: Cooling water discharge passage
216 cooling groove 220 cover member
221: descending passage 222: rising passage
223: fixing hole 224: cooling water
230: piston member 231: screw hole
232: wing 233: packing groove
240: shaft 241: screw portion
250: holder 251: incision groove
252: spiral groove 253: fastener
254: connector

Claims (4)

An upper block 100 having a resin injection nozzle 110, an intermediate block 120 connected to the resin injection nozzle 110 and having a Y-shaped resin flow hole 121 formed therein, and a ceramic inside The pin guide bushing 135 is inserted into the lower end of the valve pin 132 is inserted into the inside of the ceramic pin guide bushing 135 so as to be lifted and at the same time the lower end of the valve pin 132 is a thermally conductive ceramic An upper mold (A) including a lower block (130) formed of a nozzle assembly (131) accommodated and installed in the nozzle (134); And a mold cavity 145 and the mold installed at a lower portion of the nozzle assembly 131 so that the support block 140 is disposed to be in close contact or detachable to face the thermally conductive ceramic nozzle 134 of the lower block 130. A lower mold (B) in which an ejector pin 143 for supporting the cavity 145 is placed directly below the mold cavity 145; In the injection molding valve hot runner device,
The valve pin driving unit 200 has a valve pin driving unit 200 by providing an installation space 122 in an intermediate block 120 in which the upper end of the valve pin 132 is disposed. The body 210, the piston member 230, and the cover member 220, which is opened and provided with an operating chamber 211 provided therein,
A cooling water passage 224 and an upward guide passage 214 are formed at one side of the body 210, and the cooling water passage 224 includes a cooling water inflow passage 215a and a cooling water discharge passage 215b.
The valve driving unit 200 forms a pneumatic opening line 123a and a pneumatic closing line 123b that communicate with the outside on one side and the other side of the installation space 122, respectively, and inside the installation space 122. In the upper portion is connected to the pneumatic opening line (123a) and the pneumatic closing line (123b) and the lower portion is connected to the upper end of the valve pin 132 can be performed by the pneumatic lifting operation of the valve pin 132 And
The cover member 220 is installed in close contact with the opening of the body 210, the downward flow path 221 disposed on the upper surface of the piston member, and the rising flow path connected to the rising guide flow path 214 of the body 210 ( 222 is formed is a valve hot runner device of the injection mold, characterized in that connected to the pneumatic opening line (123a) and pneumatic closing line (123b). The method of claim 1,
The pneumatic opening line (123a) and the pneumatic closing line (123b) portion of the injection mold valve hot runner device, characterized in that formed to face the cooling water input line (124a) and the cooling water discharge line (124b). The method according to claim 1 or 2,
Pneumatic opening line (123a) formed in the intermediate block 120 so that the valve pin drive unit 200 accommodated in the installation space portion 122 of the intermediate block 120 is not affected by the high heat generated in the mold. And a coolant input line 124a and a coolant discharge line 124b at positions orthogonal to the pneumatic closing line 123b, respectively, and the cover member 220 is formed with the coolant input line 124a and the coolant discharge line 124b. The cooling water passage 224 is formed to face each other, and the body 210 forms a cooling groove 216 on the entire outer circumferential surface thereof, and is connected to the cooling water input line 124a on one side of the upper surface of the body 210 and at the same time. While forming a coolant inflow passage (215a) in communication with the lower end of the groove 216, while being connected to the coolant discharge line (124b) on the opposite side of the coolant inflow passage (215a) and communicating with the upper end of the cooling groove (216) To form a cooling water discharge passage 215b Injection mold hot runner valve apparatus as ranging. The method of claim 3,
The cooling groove 216 of the body 210 is formed in a spiral structure such that the cooling water supplied to the cooling water inlet passage 215a passes through the entire outer circumferential surface of the body 210 to form a spiral structure. Valve hot runner unit.

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