KR101983241B1 - Color valve for color adjustment of liquid silicone rubber - Google Patents

Abstract

Disclosed is a color valve for color adjustment for precisely adjusting the amount of color pigment added to liquid silicon rubber. To this end, provided is the color valve including a supply amount adjustment unit. The supply amount adjustment unit includes: an upper block part which has a polygonal columnar insertion groove formed on a side surface thereof; and a polygonal column which has a plurality of receiving grooves having different depths formed on each side surface facing a supply amount adjustment pin so as to maintain a charging pressure at an accurate level for supplying a predetermined amount of a coloring agent, and is fitted into the polygonal columnar insertion groove. According to the present invention, since a method of adjusting an assembly position of a bolt is not used to determine the input amount of the color pigment, the problem that the bolt is loosened by the vibration and the input amount of the color pigment is changed is prevented even if it is used for a long time. Further, the input amount of the specified color pigment can be maintained constantly.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a color valve for a color liquid silicone rubber,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color control color valve used for coloring liquid silicone rubber, and more particularly, to a color control color valve for precisely controlling the amount of color pigment added to liquid silicone rubber.

Liquid Silicone Rubber (LSR) is widely used commercially today, for example, in the molding and coating of articles and films, caulks, sealants and the like. The LSR contains at least one organopolysiloxane having a plurality of aliphatically unsaturated groups such as a vinyl group, an allyl group, a higher-order l-alkenyl group, a (meth) acryloyl group, an ethynyl group and the like.

Injection molding is known as a method of forming and processing such LSRs. The injection molding is a manufacturing technique of injecting the LSR into a cavity formed in an injection mold along sprue, runner and gate to solidify the LSR to produce a desired shape of a molded product, It is mainly used to produce products using LSR.

In particular, in the case of injection molding an LSR, a liquid resin injection molding method (LIM: Liquid Injection Molding) is known in which the LSR is injected into a high temperature mold to thermally cure the resin. In the LIM injection molding method, the LSR is injection- Injection molding of a thermosetting resin injects LSR into a mold heated to maintain a constant temperature and waits for the time required for curing the LSR to induce sufficient curing of the LSR, And the mold is kept heated continuously for the next operation even after the product is taken out.

To achieve high strength after such LSRs have been crosslinked to solids, relatively large amounts of reinforcing fillers are added, and color pigments in reinforcing fillers have a significant impact on the quality of the raw materials and are generally very expensive.

Accordingly, in recent years, development of a color valve capable of stably and precisely controlling the amount of color pigment input has been desired.

Korean Patent No. 10-1601836 (published on Mar. 22, 2016) Korean Patent No. 10-0320731 (published on Jan. 19, 2002)

Accordingly, an object of the present invention is to provide a color valve for color control of a liquid silicone rubber which can precisely control the amount of color pigment used for coloring the liquid silicone rubber, and which does not cause malfunction even after a period of use have.

According to an aspect of the present invention, there is provided an apparatus for controlling a supply amount of a coloring agent for coloring a liquid silicone rubber, the apparatus comprising: a supply amount adjusting unit for adjusting a supply amount of a coloring agent for coloring the liquid silicone rubber; Wherein the supply amount regulating portion includes an upper block portion having a polygonal columnar interpolating groove formed on a side surface thereof and an upper block portion having a polygonal columnar interpolating groove formed on an opposite side to the supply amount regulating pin so as to maintain a charging pressure at an accurate level for supplying a predetermined amount of the colorant. And a polygonal column having receiving grooves of different depths formed on respective side surfaces thereof and fitting into the polygonal columnar interpolating groove.

According to the present invention, since the method of adjusting the mounting position of the bolt is not used to determine the amount of the color pigment, the problem of the bolt being loosened by the vibration even when used for a long time, The amount of the color pigment can be maintained constantly.

According to the present invention, since the structure for determining the input amount of the color pigment is formed to have a block structure, it can be used for a long time, and the input amount of the color pigment can be visually and clearly confirmed.

1 and 2 are perspective views for explaining a color valve according to an embodiment of the present invention.
3 is an exploded perspective view illustrating a color valve according to another embodiment of the present invention.
4 is a perspective view showing a part of an injection molding apparatus provided with a color valve according to the present invention.
5 is a cross-sectional view showing a part of the configuration of an injection molding apparatus provided with a color valve according to the present invention.

Hereinafter, a color valve for color control of a liquid silicone rubber according to preferred embodiments of the present invention (hereinafter, referred to as a 'color valve for color control') will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are perspective views for explaining a color valve according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view illustrating a color valve according to another embodiment of the present invention.

Referring to FIGS. 1 to 3, the color-adjusting color valve 100 according to the present invention is for adjusting the supply amount of the coloring agent supplied from the colorant tank so that secondary mixing can be performed at a predetermined ratio with the primary mixture. A supply amount adjusting unit 110 and 120 for controlling the supply amount of the coloring agent for coloring the liquid silicone rubber and a supply amount adjusting pin 140 for raising and lowering the operation according to the operation of the supply amount adjusting units 110 and 120.

Hereinafter, each component will be described in more detail with reference to the drawings.

1 to 3, a color valve 100 according to the present invention includes supply amount adjusting portions 110 and 120.

The supply amount adjusting units 110 and 120 are provided for adjusting the amount of the color pigment to be supplied through the rotation of the upper block 110 and the polygonal column 120 ).

The upper block 110 has a polygonal columnar interpolating groove 112 formed on a side surface thereof. Here, the polygonal columnar interpolating groove 112 may be formed as a square column, a triangular column, a pentagonal column, or the like.

If necessary, one or more fastening holes 114 communicating with the polygonal columnar interpolating groove 112 may be formed on the upper surface of the upper block 110. This fastening hole 114 provides a space into which the fixing pin 130, which restricts the movement of the polygonal column 120 fitted into the polygonal columnar interpolating groove 112, can be inserted. For example, the fastening hole 114 is formed on the upper surface of the upper block portion 110 adjacent to the distal end of the polygonal column hole through-hole 112 opposed to the entrance where the polygonal column hole 112 is opened. If necessary, two or more fastening holes 114 may be provided on the upper surface of the upper block 110.

Since the polygonal column 120 fitted into the polygonal columnar interpolating groove 112 is restricted in the forward and rearward movements by the fixing pin 130 fitted into the fastening hole 114, So that it is possible to stably maintain the fitting position of the inside of the upper block 110.

The polygonal column 120 is fitted into the through hole 112 of the upper block 110 and is configured to hold the charging pressure at a precise level to supply a predetermined amount of colorant, Receiving grooves 122, 124 and 126 having different depths are formed on the respective opposite side surfaces.

The polygonal column 120 may be formed to have a structure corresponding to the structure of the polygonal columnar interpolating groove 112 so as to be smoothly fitted into the polygonal columnar interpolating groove 112. For example, if the polygonal columnar interpolating groove 112 is formed as a square columnar groove, the polygonal column 120 is also formed as a quadrangular column, and when the polygonal columnar interpolating groove 112 is formed into a triangular columnar groove structure The polygonal column 120 is also formed as a triangular pillar. As such, the polygonal column 120 may be formed as a rectangular column, a triangular column, or a pentagonal column.

The receiving grooves 122, 124 and 126 of the polygonal column 120 are formed on the surface of the polygonal column 120 facing the supply amount adjusting unit 140 so as to maintain a charging pressure at a correct level for supplying a predetermined amount of colorant. A plurality of pillar 120 may be formed along the side surface.

More specifically, the receiving grooves 122, 124 and 126 of the polygonal column 120 may be formed in the polygonal column 120 so as to have a total number less than the total number of lateral sides provided in the polygonal column 120. For example, two to three receiving grooves are formed in the polygonal column 120 formed in a triangular columnar structure, two to four receiving grooves are formed in the polygonal column 120 formed in a square columnar structure, In the formed polygonal column 120, two to five receiving grooves are formed.

As described above, in order to divide the quantitative supply of the colorant into a plurality of levels, the higher the total side number is, the better, but it is preferable to use a quadrangular column which can be divided into three or four levels.

The polygonal column 120 formed in a rectangular pillar structure according to the present invention has a first receiving groove 122 formed at the shortest depth on the first side and a second receiving groove 122 formed on the second side adjacent to the first side, A second receiving groove 124 formed at a depth and a third receiving groove 126 formed at a deepest depth at a third side adjacent to the second side.

At this time, the first receiving groove 122 may be used for 0.035 cc, the second receiving groove 124 may be used for 0.070 cc, and the third receiving groove 126 may be used for 0.105 cc. In addition, the number of the capacity of each receiving groove may be indicated on the front surface of the polygonal column 120. For example, as shown in FIG. 3,? 35 is marked on the front surface of the first receiving groove 122 for 0.035 cc, which is on the same line as the front surface of the second receiving groove 124 for 0.070 cc, ? 70 is marked, and? 105 is marked on the front surface co-located with the third receiving groove 126 for 0.105 cc.

Accordingly, when the user intends to inject 0.035 cc of the coloring agent into the liquid silicone rubber, the rectangular pillar is placed on the upper block portion 110 so that the first receiving groove of the polygonal column 120 faces the supply amount adjusting portion 140. [ And the second receiving groove of the polygonal column 120 is opposed to the supply amount regulating portion 140 so that the rectangular column is inserted into the upper block such that the second receiving groove of the polygonal column 120 faces the supply amount regulating portion 140. [ And the third receiving groove of the polygonal column 120 faces the supply amount adjusting part 140 when the coloring agent is to be injected into the liquid silicone rubber by 0.105 cc. And the square pillar is fitted into the through hole 112 of the upper block portion 110.

In addition, the polygonal column 120 may be provided with a coupling groove 128 at a position facing the coupling hole 114 so that the end of the fixing pin can be inserted and inserted.

If necessary, the supply amount adjusting unit may further include a fixing pin 130.

The fixing pin 130 is coupled to the fastening hole 114 of the upper block 110 to restrict the movement of the polygonal column 120 and it is preferable to use one or two fixing pins. Specifically, the fixing pin 130 passes through the fastening hole 114 and is inserted into the fastening groove 128 to fix the polygonal column 120 to the inside of the upper block portion 110.

When two of the fixing pins 130 are used, two fixing pins are coupled to the upper surface of the polygonal column 120 fitted into the through hole 112 of the upper block 110. For this, two fastening holes 114 into which the fixing pins 130 are inserted are formed, and two fastening grooves 128 are also formed on the upper surface of the polygonal columns 120.

FIG. 4 is a perspective view showing a part of an injection molding apparatus equipped with a color valve according to the present invention, and FIG. 5 is a sectional view showing a part of an injection molding apparatus equipped with a color valve according to the present invention.

Referring to FIG. 4, the color valve 100 according to the present invention includes a supply amount regulating unit 140, a coloring agent discharging pin 150, and a coloring agent quantitative discharging unit 160.

The supply amount regulating unit 140 is configured to perform the up-down operation according to the operation of the supply amount regulating unit.

The coloring agent discharging pin 150 is connected to the end of the supply amount regulating part 140 to adjust the supply amount of the coloring agent while the up / down operation is performed by the supply amount regulating part 140 when the coloring agent is supplied.

The coloring agent discharging means 160 is connected to the end of the coloring agent discharging pin 150 and opens and closes the coloring agent moving path 272 formed in the unit connecting portion 270 while moving downward according to the supply amount of the coloring agent supplied from the coloring agent storing tank .

The supply amount adjusting unit 140, the coloring agent discharging pin 150, and the coloring agent quantitative discharging unit 160 are well known in the art, and a detailed description thereof will be omitted.

4 and 5, the processing unit unit of the injection molding apparatus in which the color valve 100 according to the present invention is installed includes a mixing block 210, a depressurization unit 220, a raw material mixing unit 240, A colorant tank 250, and a mixing connection portion 260. [

The mixing block 210 primarily mixes the raw materials (liquid silicone rubber and curing agent) supplied from the dosing unit and mixes the primary mixture with the raw mixer 240).

The mixing block 210 includes a raw material supply module 212 connected to the pumping means by a supply pipe or the like to supply the liquid silicone rubber and the curing agent by a predetermined discharge pressure to the primary mixing body 214, A mixing block 210 and a decompression unit 220 for transferring the mixed mixture to the decompression unit 220 side, a primary mixing body 214 having a mixing groove 216 in which primary raw materials are mixed, (Not shown).

The depressurization unit 220 reduces the supply pressure for supplying the primary mixed mixture from the mixing block 210 and supplies the mixture to the raw material mixing unit 240, To be reduced in pressure to 50 to 70 bar and supplied to the color valve 100 side.

The depressurization unit 220 includes a depressurizing unit configured to depressurize the discharge pressure through a predetermined elastic force and pressing the plate spring. The depressurized primary mixture is supplied to the mixing connection unit 260) side of the raw material feed pipe (224).

One side of the mixing connection unit 260 is connected to the raw material feed pipe 224 of the decompression unit 220 and the other side of the mixing connection unit 260 is connected to the raw material mixing unit 240 to mix the primary mixed material with the raw material mixing unit 240 A unit connection portion 270 is formed in which a color valve 100 for supplying a coloring agent is coupled so that a primary mixture and a coloring agent made of various color materials are mixed, And a coloring agent discharging portion 262 for discharging the coloring agent supplied from the color valve 100 is formed.

In addition, the unit connecting portion 270 can supply the coloring agent to the mixing connection portion 260 in a quantitative manner by forming the coloring agent transfer path 272 through which the coloring agent supplied from the color valve 100 moves.

The colorant tank 250 is a component for supplying a predetermined amount of colorant in combination with the color valve 100. The colorant tank 250 is configured to supply a predetermined amount of colorant and to supply and block the colorant. And is connected to the color valve 100 via the coloring agent amount supplying unit 252.

The raw material mixing unit 240 is a component for producing a molten resin necessary for injection molding by secondary mixing the mixture mixed with the mixing connection unit 260 and the colorant supplied from the color unit of the present invention A mixed casing in which secondary mixing is performed, and a mixing screw which is incorporated in the mixing casing and is subjected to secondary mixing of raw materials by rotation.

The raw material mixing part 240 is connected to the resin injection valve 300, which will be described later, to transfer the liquid mixture silicone rubber having various colors, that is, the liquid mixture of which has been mixed to the resin injection valve 300 side, And a mixing connection unit 260 is connected to allow a primary mixture and a coloring agent to be introduced.

The raw material mixing part 240 is connected to the mixing connection part 260 and the resin injection valve 300 through the outflow preventing panel 248 to prevent the molten resin (liquid silicone rubber of various colors) from flowing out .

Here, the mixing screw included in the raw material mixing unit 240 is composed of a first division unit and a second division unit, and the first division unit guides the mixing of the introduced primary mixture and the coloring agent, and the second division unit And serves to mix the guided primary mixture and colorant.

That is, the above-mentioned processing unit unit receives the liquid silicone rubber and the curing agent by the dosing unit, mixes the supplied liquid silicone rubber and the curing agent, and then supplies the coloring agent of various colors to the mixed mixture in a quantitative manner, Mixing is done. At this time, the resin injection valve 300 is configured to supply the molten resin, which has been mixed through the outflow preventing panel 248 formed in the raw material mixer 240, to the mold side in a quantitative manner.

The resin injection valve 300 includes a piston cover 310 having a first piston configured to move up and down in the interior thereof, a valve housing 330 coupled with the raw material mixing portion 240 to receive the molten resin, a valve housing 330 And a resin discharging connector 350 which discharges the molten resin discharged by the resin discharging member to one of a valve nozzle and a runner device .

The piston cover 310 is formed on the upper portion of the valve housing 330 and supports the upward and downward movement of the first piston in the piston cover 310. The piston cover 310 is provided at the lower end with compressed air or hydraulic pressure for up- The piston operating cover 360 is formed with the piston operating hole formed therein.

The upper end of the resin discharge member is fastened to the lower end of the first piston by a bolt or a screw so that the molten resin introduced into the valve housing 330 is supplied and cut off in accordance with the upward and downward movement of the first piston .

The resin discharge member 350 is configured so that the resin discharge member is moved up and down in the valve housing 330 and a resin discharge path for discharging the molten resin flowing out according to the operation of the resin discharge member is formed at the lower end portion. do.

The valve housing 330 includes a discharge damper that supplies and blocks the molten resin by an opening / closing member formed at a lower end of the resin discharge member. That is, the resin injection valve includes a valve nozzle and a runner device connected to the resin discharge connector 350 to supply the molten resin, which has been secondarily mixed, from the raw material mixer 240, The first piston and the resin discharge member are raised and lowered to open and close the discharge damper to discharge and supply the molten resin.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that it is possible.

100: Color valve 110: Upper block part
112: through hole 114: fastening hole
120: polygonal column 122: first receiving groove
124: second receiving groove 126: third receiving groove
130: Fixing pin 140: Feed amount adjusting pin
150: coloring agent discharging pin 160: coloring agent quantifying and discharging means

Claims (5)

A color valve comprising a supply amount regulating portion for regulating a supply amount of a coloring agent for coloring a liquid silicone rubber and a supply amount regulating fin for performing an up-down operation in accordance with an operation of the supply amount regulating portion,
The supply amount adjusting unit
An upper block portion having a square columnar groove formed on a side surface thereof and formed with a fastening hole communicating with the square columnar groove on an upper surface thereof;
A plurality of receiving grooves having different depths are formed on respective side surfaces facing the supply amount adjusting pin so as to maintain a charging pressure at an accurate level for supplying a predetermined amount of the colorant, A polygonal column; And
And a fixing pin coupled to the fastening hole to restrict movement of the polygonal column,
The receiving recesses of different depths
A second receiving groove formed at a second short depth on a second side adjacent to the first side, and a second receiving groove formed on a second side adjacent to the second side, And a third receiving groove formed at the deepest depth of the second receiving groove. delete delete 2. The apparatus of claim 1, wherein the polygonal column
And a fastening groove is provided at a position facing the fastening hole so that the end of the fastening pin can be inserted and inserted. delete

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