KR101000357B1 - Cold runner block ?multi-nozzle apparatus for liquid silicon rubber mold - Google Patents

Abstract

The present invention relates to a multi-nozzle apparatus of a cold runner block for a liquid silicone rubber mold, which is connected to a liquid silicone inlet pipe and receives liquid silicone rubber (LIQUID SILICON RUBBER; LSR), which is injected through the liquid silicone rubber mold, and is introduced through a cooling water supply pipe. A valve gate nozzle for injecting by maintaining a constant temperature by the cooling water; A nozzle pin connected to a valve gate nozzle connected to the liquid silicon inlet pipe through a “T” shaped pipe, and configured to adjust an amount of liquid silicone rubber; A U-shaped packing made of urethane material which is installed in duplicate to prevent backflow of the liquid silicone rubber through the nozzle pin; A piston attached to the U-shaped packing to move up or down according to supply and discharge of air; A fixing bolt for fixing the piston; An air intake valve connected to a bottom surface of the piston for injecting air to the piston mechanism from the outside; An air-out valve for discharging air introduced into the piston mechanism; An adjustment pin installed above the piston with a gap therein to adjust a supply amount of the liquid silicone rubber; A dish spring for elastically supporting the adjusting pins at both sides; A liquid silicon supply amount adjusting bolt for adjusting a supply amount of liquid silicon; A taper pin formed at an end of the liquid silicon supply amount adjusting bolt ', which proceeds or follows according to left and right rotations and has an inclined surface; A pin to form a space according to the progress of the taper pin, and push the control pin to open and close; It characterized in that formed on the inner surface of the liquid-silicon supply amount adjusting bolt is formed in a hexagonal nut shape that can adjust the gap through a wrench.

Liquid Silicone Rubber, LSR, Multi Nozzle, Cold Block Runner, Injection Molding Machine, Hardening Time Reduction

Description

Multi-nozzle device of cold runner block for liquid silicone rubber mold {COLD RUNNER BLOCK-MULTI-NOZZLE APPARATUS FOR LIQUID SILICON RUBBER MOLD}

The present invention relates to a multi-nozzle apparatus of a cold runner block for a liquid silicone rubber mold, and in particular, to greatly shorten the curing time during the molding of the liquid silicone rubber, to enable complex joint molding without pretreatment coating, and to generate burrs. The present invention relates to a multi-nozzle apparatus of a cold runner block for a liquid silicone rubber mold, which greatly increases productivity by blocking the base.

The inventor of the present application has devised a structure of a spiral open nozzle of a cold runner block for a liquid silicone rubber mold through Patent Application No. 10-2008-87969 (2008.09.05).

As described in claim 1 of the above application, the structure of the spiral open nozzle of the cold runner block for liquid silicone rubber mold,

"The upper part of the mold for injecting the liquid silicone rubber from the top; and the mold body integrally formed in the upper part of the mold; an injection inlet which is an injection hole for injecting the liquid silicone rubber from the upper part of the mold; An open nozzle having a structure for cooling the silicone rubber, a heat insulating part surrounding the open nozzle to insulate and waterproof the outside, and a coolant having a pipe for supplying coolant for cooling the cold runner block through the mold body It is provided as a configuration comprising a supply unit ".

Here, the description of the "structure of the spiral open nozzle of the cold runner block for liquid silicone rubber mold" is not separately described.

However, in addition to such a configuration, there is a need for a multi-nozzle device for a cold runner block for liquid silicone rubber mold having a structure that dramatically improves productivity by employing a plurality of nozzles (multi-nozzles).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a liquid silicone rubber that significantly increases productivity per unit time by constituting a plurality of valve gates in a molding structure of liquid silicone rubber. It is to provide a multi-nozzle device of a cold runner block for a mold.

Another object of the present invention is to provide a multi-nozzle device for a liquid silicone rubber mold cold runner block capable of automatically mass production by providing a device for supplying and discharging air (air) as much as possible.

Another object of the present invention is to use a liquid silicone supply amount adjusting screw to adjust the balance in the case of a large number of valve gates, liquid silicone rubber having a control device for adjusting the amount of silicon supplied by adjusting the pin distance It is to provide a multi-nozzle device of a cold runner block for a mold.

The multi-nozzle device of the liquid silicone rubber mold cold runner block according to the present invention for achieving the above object is connected to a liquid silicone inlet tube, and received liquid silicone rubber (LIQUID SILICON RUBBER; LSR) injected through the same. A valve gate nozzle for injecting and maintaining a constant temperature by the cooling water introduced through the cooling water supply pipe; A nozzle pin connected to a valve gate nozzle connected to the liquid silicon inlet pipe through a “T” shaped pipe, and configured to adjust an amount of liquid silicone rubber; A U-shaped packing made of urethane material which is installed in duplicate to prevent backflow of the liquid silicone rubber through the nozzle pin; A piston attached to the U-shaped packing to move up or down according to supply and discharge of air; A fixing bolt for fixing the piston; An air intake valve connected to a bottom surface of the piston for injecting air to the piston mechanism from the outside; An air-out valve for discharging air introduced into the piston mechanism; An adjustment pin installed above the piston with a gap therein to adjust a supply amount of the liquid silicone rubber; A dish spring for elastically supporting the adjusting pins at both sides; A liquid silicon supply amount adjusting bolt for adjusting a supply amount of liquid silicon; A taper pin formed at an end of the liquid silicon supply amount adjusting bolt, which proceeds or follows according to left and right rotations and has an inclined surface; A pin to form a space according to the progress of the taper pin, and push the control pin to open and close; It can be achieved by forming a hexagon wrench control sphere that is formed in the hexagonal nut shape on the inner surface of the liquid silicon supply amount adjusting bolt to adjust the gap through a wrench.

At this time, the liquid silicone inlet pipe, the air suction valve, the air discharge valve, and the liquid silicon supply amount adjusting bolt is preferably provided with a fixing nut for fixing them to the mold frame.

In addition, the valve gate nozzle is installed on the frame in the range of 1 to 64 (about 32 of the inventors' test results are determined optimally) can increase the yield.

In addition, the liquid silicon supply amount adjusting bolt, a tapered pin having an inclined surface, an adjusting pin for adjusting the supply amount of the liquid silicone rubber, a pin for pushing the opening and closing the adjustment pin, and a hexagonal wrench control device for adjusting the amount of liquid silicone It is preferable.

In addition, the liquid-silicon amount adjusting device is installed on the upper frame to simultaneously control the amount of the liquid silicon supplied to the plurality of valve gate nozzle, it is configured to adjust the supply amount by using a single liquid-silicon supply amount adjusting bolt. desirable.

According to the multi-nozzle apparatus of the cold runner block for liquid silicone rubber mold according to the embodiment of the present invention, the liquid silicone rubber mold for dramatically increasing productivity per unit time by configuring a plurality of valve gates in a liquid silicone rubber molding structure It is possible to implement a multi-nozzle device of a cold runner block.

In addition, according to an embodiment of the present invention by providing a device for supplying and discharging air (air) can be implemented as a multi-nozzle device of the liquid silicone rubber mold cold runner block capable of automatically mass production, maximizing the manpower of workers have.

In addition, according to an embodiment of the present invention by using a liquid-silicon supply amount adjusting screw to adjust the balance by installing a plurality of valve gates, a liquid having a control device for adjusting the amount of silicon supplied by adjusting the pin distance The multi-nozzle device of the cold runner block for silicone rubber mold can be implemented.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Example)

1 is a block diagram illustrating a multi-nozzle device of a cold runner block for a liquid silicone rubber mold according to the present invention, and FIG. 2 is a block diagram illustrating the configuration of a valve gate nozzle and a liquid control device shown in FIG. 1. It is also.

First, description of the symbols for each part will be described. In the figure, reference numeral 10 denotes a valve gate nozzle, reference numeral 20 denotes a nozzle pin for controlling the amount of liquid silicone rubber connected to the valve gate nozzle, and reference numerals 30 and 32 denote liquid silicone rubber through the nozzle pin 20. U-shaped packing made of urethane to prevent backflow, 40 is a piston that operates according to the supply and discharge of air, and 42a and 42b are fastening bolts for fixing the piston 40. Illustrated.

In addition, the reference numeral 50 is installed above the piston 40, the LSR supply amount adjusting pin for adjusting the supply amount of the liquid silicone rubber, the reference numeral 60 is a plate spring for elastically supporting the LSR supply amount adjusting pin 50 from both sides, Reference numeral 70 denotes an LSR supply regulator pin configured to adjust the supply amount of the LSR, reference numeral 80 denotes a taper pin manufactured in an inclined shape, and reference numeral 90 denotes a liquid silicon supply amount for adjusting the taper pin 80. An adjustment bolt is shown, and reference numeral 92 denotes a fixing nut for fixing the liquid silicon supply amount adjusting bolt 90 to the outside, and reference numeral 94 shows a hexagon wrench adjustment hole formed inside the liquid silicon supply amount adjusting bolt 90, respectively. do. Reference numeral 100 denotes a nozzle device, and reference numeral 110 denotes a valve gate multi-nozzle device in which a plurality of nozzle devices having such a configuration are provided. The configuration of such a valve gate multi-nozzle device will be further described in FIG.

In addition, reference numeral 114 denotes a cooling water supply pipe for cooling the valve gate by supplying cooling water, reference numeral 112 denotes a fixing nut for fixing the cooling water supply pipe 114 to the frame, and reference numeral 120 denotes a cooling nut for injecting air into the piston mechanism. An air intake valve is shown, reference numeral 122 denotes a fixing nut thereof, reference numeral 130 denotes an air-out valve for discharging air introduced into the piston mechanism, and reference 132 Denotes a fixing nut, reference numeral 140 denotes a heater cartridge for heating the frame, reference numeral 150 denotes a frame having such a configuration, and reference numeral 152 denotes an insulating material for blocking the temperature inside the valve gate nozzle from changing according to external conditions. Insulator) denotes a liquid silicon runner gate for injecting liquid silicon, respectively. Reference numeral 200 denotes a multi-nozzle device of a cold runner block for liquid silicone rubber mold in which a plurality of valve gate nozzles having such a configuration are formed.

In the description of the reference numerals of the drawings, the valve gate nozzle apparatus having one configuration has been described as an example, but the valve gate nozzle apparatus to be installed may be expanded according to the user's intention and production target quantity. Therefore, hereinafter, the operation of the nozzle device having such a configuration will be described in detail.

As described above, the valve gate nozzle 10 is installed on the frame 150 and the cooling water is supplied through the cooling water supply pipe 114 to maintain the internal temperature of the valve gate nozzle 10 at a constant level. Then, the heat insulator 152 is applied so that the temperature heated through the heater cartridge 140 is not transferred to the inside of the valve gate nozzle 10. In addition, it can be seen that the administration of the liquid silicone rubber (LSR) through the liquid silicone runner gate S shown by the symbol S is the same with reference to the contents filed by the present inventors.

Here, it is important to automatically adjust the amount of the liquid silicone supplied, in particular, a multi-nozzle device comprising a plurality of valve gate nozzle 10 (possible to install 64 CARRY up to 32, preferably 32) In this case, the amount of liquid silicone rubber is manually adjusted by the operator, which is not accurate, and there is a high possibility of a defect occurring.

Therefore, the inventor of the present application connects the nozzle pin 20 to the liquid silicone runner gate S which is connected to the above-described valve gate nozzle 10 to inject liquid silicon in a "T" shape, and automatically It was configured to control the feed amount.

Specifically, in order to prevent the backflow of the LSR supplied to the liquid silicon runner gate S through the nozzle pin 20, the U-shaped packings 30 and 32 made of urethane are doubled.

In addition, the piston 40 is installed to enable the operation according to the input and discharge of air (air), which is connected to the piston 40, the air intake valve 120 and the air discharge valve ( 130) to operate. That is, when air is introduced through the air intake valve 120, the LSR supply amount adjusting pin 70 installed at the upper portion of the piston 40 device is raised to inject liquid silicone, and conversely, the air discharge valve ( When the air is discharged through 130), the LSR supply amount adjusting port pin 70 is lowered to block the input of the liquid silicon. Here, the piston 40 device is fixed so that there is no flow using the fixing bolts (42a, 42b). In addition, the air intake valve 120 is installed in the lower portion of the piston 40 through a pipe to inflow air, the air discharge valve 130 is installed on the upper portion of the piston 40 device to discharge the air by The injection is stopped or stopped.

Next, the upper surface of the piston 40 device is provided with an LSR supply amount adjusting pin 50 supported by a counter spring 60 having an elastic force. The LSR supply amount adjusting pin 50 operates in conjunction with the LSR supply amount adjustment pin 70 configured to be raised or lowered upon injecting or discharging air as described above, and a taper pin 80 configured to have an inclined surface. The degree of opening and closing is determined according to the adjustment state of the liquid silicon supply amount adjusting bolt 90. At this time, the liquid silicon supply amount adjusting bolt 90 adjusts the hexagonal wrench adjusting hole 94 installed therein so that the LSR feed amount adjusting pin 70 moves while the taper pin 80 proceeds to form an opening. .

So configured, the liquid silicon supply amount adjustment bolt 90, the adjustable hexagon wrench adjustment hole 94 formed in the liquid silicon supply amount adjustment bolt 90 and the end portion of the liquid silicon supply amount adjustment bolt 90 The tapered pin 80 formed to be inclined, the LSR supply amount adjusting pin pin 70, which forms an opening while the taper pin 80 proceeds, the LSR supply amount adjusting pin 50, and the adjusting pin 60 are elastic. The supporting plate spring 60 acts as a liquid silicon volume control device.

Hereinafter, the introduction and operation of the liquid silicone rubber will be described in more detail with reference to FIG. 2. In the drawing, the valve gate nozzle 10 is connected to the nozzle pin 20, and the coolant is supplied to the valve gate nozzle 10 through the coolant supply pipe 114. In addition, the U-shaped packings 30 and 32 are double-installed in the nozzle pin 20 in urethane, thereby preventing the LSR from flowing into the piston 40 device side.

Next, by forming a predetermined gap (h) between the liquid-silicon amount adjusting device and the piston 40 device, the LSR supply amount adjusting pin 50 that rises or falls when adjusting the liquid-silicon supply amount adjusting bolt 90. This is used as a flowable space.

In addition, the multi-nozzle device of the cold runner block for liquid silicone rubber mold according to the preferred embodiment of the present invention configured as described above was provided with a mold adhesion preventing pin (not shown) to prevent the mold from being in close contact.

3 is a block diagram showing an arrangement of the valve gate multi-nozzle device according to an embodiment of the present invention.

As shown in FIG. 3, the multinozzle apparatus of the cold runner block for liquid rubber silicone mold according to the present invention has a merit in that mass production is possible according to a working time by installing a plurality of them on a frame.

As shown in the figure, valve gate nozzles 10 and 14 are provided, and nozzle pins 20 and 24, pistons 40 and 44, and LSR supply amounts are provided in each valve gate nozzle 10 and 14, respectively. Install a plurality of adjusting pins (shown only if 50). Here, by installing the upper frame 158 to implement a function that can be adjusted at the same time by utilizing the tapered pin 80, the fixing nut 92 and the hexagon wrench control holes (94). By such a configuration, even when a plurality of valve gate nozzles are installed, the user can adjust the LSR supply amount through a simple operation, thereby significantly increasing productivity.

In FIG. 3, reference numeral 100a illustrates an ejection support for discharging the produced product, and 100b illustrates a bushing installed on the discharge side. In addition, by configuring a plurality of heat insulators (152a, 152b), etc. on the frame 150, the LSR maintains a constant temperature irrespective of the external temperature conditions to implement a configuration that can be utilized in the production process.

According to the multi-nozzle apparatus of the cold runner block for liquid silicone rubber mold having such a configuration, since the liquid silicone rubber does not leak to the outside, no loss and burr is generated, so that expensive LSR is not wasted. The cost savings are great.

In addition, the air suction valve and the air discharge valve provided in the present invention, and the liquid silicon amount control device for adjusting the supply amount of the liquid silicon, by the unmanned working and automated production can be greatly reduced manpower It has a big effect.

In addition, since a plurality of valve gate nozzles (up to 64 nozzles can be installed) can be installed and operated automatically, the productivity can be greatly increased per unit time and the defect rate can be drastically reduced.

As described above, the multi-nozzle apparatus of the cold runner block for liquid silicone rubber mold according to the present invention not only prevents the formation of sprue and burrs by-products generated in molding the liquid silicone rubber. As a result, it is possible to reduce the manpower required to remove these by-products, and to have a remarkable effect of dramatically improving productivity through automated production.

In addition, since the waste generated in the conventional method is not generated at all, the disposal cost can be eliminated, and since the cured rubber cannot be recycled, there is an effect of preventing the environmental pollution generated by discarding it.

1 is a block diagram illustrating a multi-nozzle apparatus of a cold runner block for a liquid silicone rubber mold according to the present invention;

Figure 2 is a partial configuration for explaining the configuration of the valve gate nozzle and the liquid control device shown in FIG.

Figure 3 is a block diagram showing an arrangement of the valve gate multi-nozzle device according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10, 14: valve gate nozzle 20, 24: nozzle pin

30, 32: U-shaped packing 40, 44: Piston

42a, 42b: Fixing bolt 50: LSR supply amount adjusting pin

60: plate spring 70: LSR supply amount adjustment pin

80: taper pin 90: LSR supply amount adjustment bolt

92: fixing nut 94: hexagon wrench adjustment hole

100: nozzle device 100a: eject support

100b: bushing 110: valve gate multi-nozzle device

112, 122, 132: fixing nut 114: cooling water supply pipe

120: air-in valve 140: heater cartridge

130: air-out valve 150, 158: frame

152,152a, 152b: Insulator S: liquid silicon runner gate

Claims (5)

A multi-nozzle device of a cold runner block for liquid silicone rubber mold in which a plurality of valve gates are provided, A valve gate nozzle connected to the liquid silicon runner gate and receiving liquid silicon rubber (LIQUID SILICON RUBBER; LSR) introduced through the liquid crystal runner, and maintaining a predetermined temperature by the cooling water introduced through the cooling water supply pipe; A nozzle pin connected to a valve gate nozzle connected to the liquid silicon runner gate through a tube having a “T” shape, and configured to adjust an amount of liquid silicone rubber; A U-shaped packing made of urethane material which is installed in duplicate to prevent backflow of the liquid silicone rubber through the nozzle pin; A piston attached to the U-shaped packing to move up or down according to supply and discharge of air; A fixing bolt for fixing the piston; An air intake valve connected to a bottom surface of the piston for injecting air to the piston mechanism from the outside; An air-out valve for discharging air introduced into the piston mechanism; An adjustment pin installed above the piston with a gap therein to adjust a supply amount of the liquid silicone rubber; A dish spring for elastically supporting the adjusting pins at both sides; A liquid silicon supply amount adjusting bolt for adjusting a supply amount of liquid silicon; A taper pin formed at an end of the liquid silicon supply amount adjusting bolt and configured to have an inclined surface and to proceed or retreat according to left and right rotations; A pin to form a space according to the progress of the taper pin, and push the control pin to open and close; Formed in the hexagonal nut shape on the inner surface of the bolt for adjusting the liquid silicon supply amount; A multi-nozzle device for a cold runner block for liquid silicone rubber mold, characterized in that a plurality of them are installed. 2. The liquid phase liquid crystal according to claim 1, wherein the liquid silicon runner gate, the air intake valve, the air discharge valve, and the liquid silicon supply amount adjustment bolt are provided with fixing nuts for fixing them to the mold frame. Multi-nozzle device of cold runner block for silicone rubber mold. The multi-nozzle apparatus of the cold runner block for liquid silicone rubber mold according to claim 1, wherein the valve gate nozzle is installed in a range of 1 to 64 on the frame. 2. The liquid silicone of claim 1, wherein the liquid silicon supply amount adjustment bolt, a tapered pin having an inclined surface, an adjustment pin for adjusting the supply amount of the liquid silicone rubber, a pin for pushing the opening and closing the adjustment pin, and a hexagonal wrench control device A multinozzle device for a cold runner block for a liquid silicone rubber mold, comprising constituting a quantity control device. The liquid crystal amount adjusting device of claim 4, wherein the liquid silicon amount adjusting device is installed in the upper frame to simultaneously adjust the amount of liquid silicon supplied to the plurality of valve gate nozzles, and adjusts the supply amount by using a single liquid silicon supply amount adjusting bolt. Multi-nozzle device of the liquid rubber silicone mold cold runner block, characterized in that the configuration.

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