KR200382589Y1 - elastic valve system for injection molding - Google Patents

Abstract

The present invention discloses an injection molding machine valve device for a multi-cavity mold.

The injection molding machine valve device for multi-cavity mold of the present invention is a multi-cavity injection molding machine valve device including a manifold applied to the multi-cavity mold and a nozzle for opening and closing a gate by a valve pin, which is fixedly installed on an upper side of the manifold. Drive means consisting of a stationary motor for rotating the screw shaft protruding toward the manifold and a lifting plate which is screwed with the screw shaft to have a position displacement in the vertical direction in conjunction with the rotation of the screw shaft, and the top of the plurality of valve pins fixedly coupled to one side thereof And, by adjusting the amount of resin passing through the nozzle, the valve pin passes through the inner center and the upper end is provided by the adjustment of the screw while the lower end is the pressure control pin located on the diameter reduction portion is reduced diameter of the resin channel It is configured to include a resin pressure adjusting means having a.

The injection molding machine valve device for the multi-cavity mold, which is configured as described above, controls the multiple nozzles applied to the multi-cavity mold to open and close the gates of several nozzles integrally with a single drive source, thereby preventing molding defects due to the difference in opening and closing time of each nozzle. As a result, there is an advantage to enable mass production of high quality mass molded products.

Description

Elastic valve system for injection molding

The present invention relates to an injection molding machine valve device for a multi-cavity mold, and more specifically, to control the injection amount of each nozzle independently while controlling the opening and closing of a plurality of nozzles applied to the multi-cavity mold with a single driving source. The present invention relates to an injection molding machine valve device for a multi-cavity mold suitable for mass production of high-quality mass molded products.

In general, an injection molding machine for molding a plastic product injects a water support material into a manifold from a mold cylinder in which resin is melted, and the injected resin is distributed evenly along a resin channel branched in the manifold to be coupled to the bottom of the manifold. It is a device that is supplied to each of the at least one nozzle and injected into the cavity of the mold, which is a product forming mold.

The injection molding machine is configured to open and close the gate by the lifting and lowering operation of the valve pin, and in the case of molding several pieces at a time according to the quantity of molded products, a manifold type that receives resin through a manifold is used, and a single product is produced. Single type is used when

1 is a cross-sectional view showing a multi-cavity injection molding machine valve device for elevating the valve pin by using a high-pressure air as the operating pressure according to the prior art.

As shown in the related art, the conventional multi-cavity injection molding machine valve device is composed of a driving unit 100 and the valve device 200 and uses high pressure air as a driving source for the lifting operation of the valve pin 210.

That is, the driving unit 100 is formed with a plurality of air channels (110, 120) which is a pipe for supplying and discharging air of high pressure from the outside, and selectively through the plurality of air channels (110, 120) The piston 140 in the cylinder 130 moves up and down by the high pressure air flowing in. At this time, the lower end of the piston 130 has a structure in which the valve pin 210 is connected and interlocked.

In addition, the valve pin 210 is configured to selectively block or open a gate that forms the front end of the nozzle 220 by being elevated in conjunction with the piston 130.

On the other hand, the valve device 200 includes a nozzle 220 to which the heater is wound to prevent the solidification of the resin by forming an outer body, the valve pin 210 in the nozzle 220 in the vertical direction It is a structure that is installed to achieve lifting. Here, the nozzle 220 is a resin channel 230 is formed with a predetermined gap around the valve pin 210, both ends of the resin channel 230, the gate of the nozzle and the resin channel of the manifold 300 Each structure is connected to the 310.

In the injection molding machine valve device for the multi-cavity mold configured as described above, when a high-pressure operating pressure is selectively supplied through the air channels 110 and 120, the piston 140 moves up or down, and at the same time, the valve pin 210 is interlocked. Lifting operation is performed integrally. Therefore, as the piston 140 is elevated, the gate of the nozzle is opened or shut off, and as a result, the resin supplied through the manifold 300 is supplied into the mold or blocked through the gate.

In summary, the valve gate device for the injection molding machine to operate the air pressure according to the prior art to raise the piston 140 by selectively supplying the high pressure air into the cylinder 130 through the corresponding air channels (110, 120), At this time, in conjunction with the piston 140, the valve pin 210 opens and closes the gate of the nozzle.

However, since the valve device according to the related art configured as described above uses high pressure air as an operation source for elevating the valve pin, it is necessary to adopt an airtight structure to prevent air leakage and a large pneumatic device for supplying the working pressure. As it requires a compressor, the structure is complicated by its volume, which is not only limited to the installation space but also has a disadvantage of extremely poor maintenance and management.

In addition, when applied to a multi-cavity mold having a plurality of nozzles, due to the dimensional dispersion of each nozzle, a deviation occurs in the injection amount of each nozzle, there was a problem that it is difficult to mass-produce a molded article having a uniform quality.

In order to solve such a problem, the applicant has applied for utility model registration No. 2002-09883 (Registration No. 0280604, registration decision), Utility Model Registration Application No. 2002-09884 (Registration No. 0280605, Registration Maintenance Decision), utility Application for registration of utility model No. 2002-09885 (registration No. 0280606, registration maintenance decision), application for utility model registration No. 2002-19175 (registration No. 0290456, registration maintenance decision), application for utility model registration No. 2003-0034932 (registration) No. 0341515 registration maintenance decision, Utility Model Registration Application No. 2003-0038360 (Registration No. 0344137 registration maintenance decision) has proposed a valve device for operating the valve pin in the vertical direction by the power source.

Looking at the configuration of these valve device roughly, the valve body and the drive means is largely composed, the valve body is a resin flow path for injecting the resin into the mold through the gate provided at the tip is formed in general Take the valve structure. As the driving means, a forward / reverse motor or an actuator for raising and lowering the valve pin by power supply is used.

In this way, the applicant's prior application of the valve device is possible to reduce the overall size of the valve device by the structure of employing a forward / reverse motor or an actuator driven by a power supply as a drive source, thereby increasing the degree of freedom in mold design. In addition, the movement amount of the valve pin can be controlled quickly and precisely.

However, the conventional valve device, which the applicant has previously filed, is configured to independently configure the motor or the actuator for each nozzle to control the lifting and lowering of the valve pin for opening and closing the nozzle. When applied to the mold to replace and repair the drive source is not easy to cause workability and productivity degradation, in particular, because the expensive drive source must be employed independently for each nozzle, there was a problem that the manufacturing production price goes up.

In addition, since a plurality of drive sources have operating characteristics, there is a disadvantage that it is difficult to equalize the opening and closing times of each nozzle. To this end, by controlling the operating time of the valve pin by varying the voltage of each drive source, etc. As a result, the opening and closing time of the various nozzles can be adjusted to match, but the work time takes a lot, there is a problem causing a decrease in productivity.

The present invention has been made to solve the above problems, the object of the present invention is to control the mass of the multi-nozzle applied to the multi-cabby as a minimum drive source by matching the opening and closing time to reduce the production cost while mass production of molded products An injection molding machine valve device for a multi-cavity mold is made possible.

The other object of the present invention is to precisely control the injection quantity of each nozzle independently to compensate for the uneven injection amount due to the processing deviation of each nozzle and manifold, thereby enabling mass production of high quality mass molded products while An object of the present invention is to provide an injection molding machine valve device for a multi-cavity mold, which can greatly increase the degree of freedom of processing of a fold.

An injection molding machine valve apparatus for a multi-cavity mold according to the present invention for realizing the above object comprises: a manifold having a branched resin channel for injecting a water support material into the multi-cavity mold; A plurality of nozzles disposed on a lower surface of the manifold and connected with a resin channel through which resin is supplied to a gate of a tip portion, and having a valve pin of a length member at an inner center thereof to open and close the gate by a lifting operation; It is fixed to the upper side of the manifold and the stationary motor for rotating the screw shaft protruding toward the manifold and screwed with the screw shaft to have a position displacement in the vertical direction in conjunction with the rotation of the screw shaft and a plurality of valve pin top to one side A driving means comprising a lifting plate fixedly coupled; The valve pin is passed through the nozzle to adjust the amount of resin passing through the nozzle, and the upper end is provided to be elevated by adjusting the screw, and the lower end is provided with a pressure adjusting pin positioned on the diameter reducing part which reduces the diameter of the resin channel. Characterized in that it comprises a resin pressure adjusting means.

As a preferable feature of the present invention, the driving means is further provided on the upper and lower sides of the lifting plate to limit the opening and closing position of the gate is configured to further include a sensing unit to detect the driving time of the lifting plate to control the driving of the stationary motor It is in becoming.

As another preferred feature of the present invention, the resin pressure adjusting means is fixed to the upper surface of the manifold and the upper portion of the pressure adjusting pin is screwed through the upper end of the support and the pressure control pin protruding to the upper side of the support It is composed of a control post that is interlocked in a worm gear method on the outer circumference to interlock the pressure control pins according to the operator's operation force, and the nozzle is made of at least one metal plate in which a heater is embedded, which is a heating element that prevents the outer circumference from being hydrated. It is inserted into the installation hole of the heater block.

As another preferred feature of the present invention, the driving means is driven integrally provided on the output shaft of the stationary motor, and driven driven integrally coupled to one side of each screw shaft screwed to a plurality of positions to raise and lower the lifting plate in a balanced manner It further comprises a pulley, a timing belt for connecting the drive pulley and the driven pulley to rotate integrally.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are consistent with the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best explain his or her design. It must be interpreted as meaning and concept.

Hereinafter, a preferred embodiment of a multi-cavity injection molding machine valve device according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 are cross-sectional view showing a nozzle opening and closing state of the injection molding machine valve device for a multi-cavity mold of the present invention, Figure 4 is a cross-sectional view showing a resin pressure control state, Figure 5 is a perspective view for explaining the resin pressure control means to be.

As shown in the figure, the multi-cavity injection molding machine valve device of the present invention, the driving means 30 for raising and lowering the manifold 10, the nozzle 20 and the valve pin 25 and the number of the resin pressure can be adjusted Acupressure control means 40 is configured.

The manifold 10 has a substantially metal plate shape and is formed in a branched shape of the resin channel 10a through which the water support material in the molten state is moved, and moves along the resin channel 10a on the upper and lower surfaces thereof. In order to prevent the resin from solidifying, a wire-type heater (unsigned), which is a heating element, is embedded.

As shown in the figure, the manifold 10 forms a diameter reducing portion 10b on which the diameter is reduced on the resin channel 10a, and the diameter reducing portion 10b is a pressure adjusting pin 41 to be described later. The taper is processed in the form of narrowing the diameter while proceeding downward so that the diameter can be expanded and contracted as the elevating. At this time, the minimum diameter of the diameter reducing portion 10b is equal to the diameter of the resin channel 20a of the nozzle 20.

The manifold 10 has a structure in which a driving means 30 for elevating the valve pin 25 is provided upward, and a nozzle 20 for injecting resin into the mold is provided below.

The nozzle 20 has a cylindrical shape and a member of a length member whose heater line h is wound on its outer circumferential surface, and a resin channel 20a connected to the resin channel 10a of the manifold 10 is formed at the inner center thereof. The resin channel 20a is connected to a resin outlet, that is, a gate (unsigned), which forms the leading end of the nozzle 20. Although not shown, the gate is connected to one end of a mold for molding an injection molded product.

In addition, the nozzle 20 has a configuration in which a heater wire h is wound around the outer circumferential surface to prevent the resin from passing through the resin channel 20a from being solidified.

The nozzle 20 is provided with a valve pin 25 of a length member having a smaller diameter than the inner diameter of the resin channel 20a formed at the center thereof, so that resin can flow around the valve pin 25. have. In this case, the valve pin 25 opens and closes the gate by a lifting operation. The upper end of the valve pin 25 is connected to the lifting plate 36 of the driving means 30 through the manifold 10.

The drive means 30 is composed of a stationary motor 31 for generating rotational driving force in one direction and a reverse direction, and a lifting plate 36 connected to the stationary motor 31 and the screw shaft 32 to form a lift.

First, the stationary motor 31 is a structure that is fixed to the bracket (b) located at a predetermined distance on the upper side of the manifold (10). The forward and reverse motor 31 is provided with a shaft (unsigned) that is rotated in the forward and reverse direction selectively by receiving power from the outside, the shaft is disposed toward the manifold (10) screw shaft 32 The configuration is connected to.

On the other hand, the screw shaft 32 is configured so that the upper end is connected to the stationary motor 31 receives the driving force, the lower end is rotatably provided on the upper surface of the manifold 10, the screw line is processed once the outer peripheral surface Structure. The screw shaft 32 is provided in the form of passing through the screw holes (unsigned) formed on one side of the lifting plate 36 to raise and lower the lifting plate 36 by the rotational force of the stationary motor 31. do.

The elevating plate 36 is a plate-shaped member that is connected to the upper end of the plurality of valve pins 25 and a structure in which a screw hole (unsigned) through which the screw shaft 32 passes is formed in at least one or more places. to be.

Here, the lifting plate 36 is coupled to the upper end of the valve pin 25 so that the lifting and lowering interlocking with the valve pin 25, the coupling structure can be implemented in various ways. For example, the upper end of the valve pin 25 by welding or fitting structure to the lifting plate 36, or as shown in the drawing, the upper peripheral edge of the valve pin 25 is screwed and the valve pin 25 Nut member (unsigned) that is screwed with the upper end of the) may be coupled to the fitting structure on the lifting plate (36).

The driving means 30 configured as described above includes a sensing unit 37 to limit the lifting distance of the lifting plate 36 and consequently determine the opening and closing position of the nozzle 20 of the valve pin 25. The sensing unit 37 is provided on the upper and lower sides of the elevating plate 36 to detect when the elevating plate 36 is close to serve to limit the elevating operation by controlling the driving of the stationary motor 31. do.

On the other hand, the detection unit 37 in the present design shows a structure to control the driving of the stationary motor 31 by detecting the lifted position of the lifting plate 36, the present invention is not limited to this valve pin 25 If it has a feature that can limit the opening and closing position of the detection unit 37 may be variously modified and configured. For example, a potentiometer, an encoder, or the like, which is widely used for general motor control, may be used.

The resin pressure regulating means 40 is for adjusting the amount of resin passing through the nozzle 20. The resin pressure adjusting means 40 is provided with a large end in the resin channel 10a to variably adjust the inner diameter by the lifting operation to pass through the resin channel. A pressure adjusting pin 41 for adjusting the pressure, a support 42 for selectively lifting and lowering the other end of the pressure adjusting pin 41, and transmitting the operator's operating force to the pressure adjusting pin 41; It is composed of a control post (43).

The pressure regulating pin 41 is a hollow member having a tubular shape so that the valve pin 25 can pass through the inner center, and an upper end portion protrudes upward of the manifold 10 and a lower end portion of the resin channel 10a. Is located on the diameter reducing portion 10b.

That is, the upper end of the pressure adjusting pin 41 is screwed to the support 42 while being machined to the outer periphery is provided to be elevated by the screw adjustment method, the lower end is tapered to become a small diameter while the outer diameter proceeds downward The diameter reducing portion 10b is located on the diameter reducing portion 10b, where the diameter reducing portion 10b is narrowed in diameter as it is shown in the figure so that the diameter may be reduced when the pressure adjusting pin 41 moves downward. It is tapered into paper, and the minimum diameter of the diameter reducing portion 10b is processed to the same size as the diameter of the resin channel 20a of the nozzle 20.

The support 42 is installed on the manifold 10 to prevent flow through welding or fitting structures, and the like to pass through the upper outer periphery of the pressure adjusting pin 41 through the inner center of the screw. This is processed.

The control post 43 has a gear tooth corresponding to the upper outer peripheral edge of the pressure control pin 41 and the worm gear method is formed, one side so that the operator can rotate using a tool such as a driver Cruciform grooves are formed. The control post 43 is preferably supported by at least one bearing 43b and the support structure 43c as shown in FIG. 5 to prevent flow in the up, down, left and right directions.

On the other hand, the pressure adjustment pin 41 is preferably provided with an upper end portion that is engaged with the control post 43 and the worm gear in the form of an expanded diameter compared to the lower end portion to enable fine adjustment during the lift.

Resin pressure adjusting means 40 is configured as described above when the control post 43 rotates in one direction or in reverse direction, the pressure adjusting pin 41 is moved up and down in the vertical direction. For example, when the adjustment post 43 rotates in one direction in the state as shown in FIG. 2, the pressure adjusting pin 41 is lowered in association with this to reduce the diameter of the diameter reduction part 10b as shown in FIG. 4. The resin passing amount in 20 is reduced.

Meanwhile, in the present invention, the lower end of the pressure regulating pin 41 is provided on the resin channel 10a of the manifold 10 connected in series with the resin channel 20a of the nozzles 20 and 20. Exemplary embodiments of the present invention, but the present invention is not limited to this, if it has a feature that can vary the size of the inner diameter of the resin channel may be implemented by having a lower end of the pressure control pin 41 in various positions. For example, the lower end of the pressure control pin 41 may be formed to extend to a position close to the gate of the nozzle 20, wherein the injection of the nozzle 20, the end of the pressure control pin 41 is located A diameter reducing portion 10b will be formed in the channel.

6 to 7 are cross-sectional views to which the heater block is applied in the injection molding machine valve apparatus for the multi-cavity mold according to the present invention, which are substantially the same as the configuration of FIGS. However, the present embodiment is characterized in that the heater block 50 is embedded with a heater wire 50h is embedded to heat the nozzle 20, wherein the heater block 50 is a single unit as shown in FIG. It may be provided as a metal plate or may be provided in the form of a plurality of metal plates having a predetermined thickness as shown in FIG.

The heater block 50 configured as described above forms a mounting hole into which the nozzle 20 is inserted, and the heater wire 50h is embedded in the periphery of the mounting hole, so that the heater block 50 is applied to the multi-nozzle 20 applied to the multi-cavity mold. In the case of application, workability is good because it does not have to wind a separate heater wire for each nozzle.

8 to 9 are cross-sectional views showing another embodiment of the drive means in the multi-cavity mold injection molding machine valve device according to the present invention, the multi-cavity mold injection molding machine valve device in the present embodiment is shown in Figs. Since they are roughly the same as, the same reference numerals are used for the same components.

As shown in the figure, the drive means 30 drives the plurality of screw shafts 32 using a single motor 31 so that the lifting plate 36 can be lifted in a stable and balanced state. It is a main feature.

The drive means 30 is configured to rotate by integrally connecting the drive pulley 33 to the shaft of the stationary motor 31 for generating a driving force, a plurality of driven pulleys on the same plane with the drive pulley 33 ( 33) is rotatably arranged. One drive pulley 33 and a plurality of driven pulleys 33 are connected to each other with a timing belt 35 so as to rotate integrally.

At this time, the driven pulley 33 is one end, that is, when viewed from the drawing is a screw shaft 32 is coupled to the lower structure is rotated integrally, each of these screw shaft 32 is one side of the elevating plate 36 It is a structure that is passed through the screw connection to the screw hole (unsigned) formed in the.

Here, each of the screw shaft 32 may be appropriately disposed according to the number of the nozzle 20 and the shape of the lifting plate 36 to maintain a stable balance state when the lifting plate 36 is moved up and down. will be.

When the driving means 30 is configured such that the stationary motor 31 rotates in one direction, the driving pulley 33 is interlocked to achieve one direction rotation. Subsequently, the plurality of driven pulleys 33 connected to the driving pulley 33 and the timing belt 35 and the screw shaft 32 connected to the driven pulley 33 are rotated in one direction, and as a result, the lifting plate 36 is valved. Ascending and descending with the pin 25 to open and close the nozzle 20.

Referring to the operation of the multi-cavity injection molding machine valve device of the present invention is configured as described above are as follows.

First, the opening and closing operation of the nozzle, when the power supply to the stationary motor 31 in the state in which the nozzle 20 is closed, as shown in Figure 2, the screw shaft 32 connected to the stationary motor 31 rotates in one direction While moving the screw-mounted lifting plate 36 up.

Therefore, as the lifting plate 36 is moved upward, the valve pin 25 connected to the lifting plate 36 is also moved upward integrally to achieve a state in which the gate is opened as shown in FIG. 3. In this case, when the lifting plate 36 moves upward to a certain height, the sensing unit 37 installed at the corresponding position detects this to control the stationary motor 31 to maintain the open state of the gate.

In addition, when the forward and reverse motor 31 generates a reverse rotation force in the state where the gate is opened as described above, the screw shaft 32 reversely rotates in association with this, and as a result, the lifting plate 36 descends and the gate as shown in FIG. 2. Will be blocked.

On the other hand, the opening and closing operation of the nozzle 20 by the driving means 30 shown in Figs. 8 and 9 will be described. When power is supplied to the stationary motor 31, the drive pulley axially coupled to the stationary motor 31 33 is rotated in one direction or in reverse with one or more driven pulleys 33 connected to the timing belt 35. At this time, since the screw shaft 32 is connected to each driven pulley 33, the lifting plate 36 moves up and down integrally with the valve pin 25 by the rotation of the screw shaft 32, Opening and closing.

Second, in the case of adjusting the injection amount of the nozzle 20 by changing the diameter of the resin channel, the control post 43 of the resin pressure adjusting means 40 is rotated in one direction using a tool in the state as shown in FIG. 2. Then, the control post 43 and the pressure control pin 41 interlocked in the worm gear system are interlocked to move downward while rotating in one direction.

Therefore, as the pressure adjusting pin 41 descends, the interval between the diameter reducing portions 10b is narrowed as shown in FIG. 4, so that the resin passing amount can be reduced. On the contrary, when the adjusting post 43 is rotated in the reverse direction, the pressure adjusting pin 41 moves upward, thereby expanding the diameter of the diameter reducing part 10b, and as a result, the resin passage amount is increased.

The resin pressure adjusting means 40 acting as described above can be independently mounted to each nozzle 20 to precisely adjust the resin amount of the nozzle 20. As a result, the injection amount of the plurality of nozzles 20 can be easily adjusted under the same conditions. Can be set.

On the other hand, the present invention is not limited to the embodiments described, it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the utility model registration claims of the present invention.

The injection molding machine valve device for a multi-cavity mold constructed and operated as described above, opens and closes gates of several nozzles integrally with a single driving source in controlling the multi-nozzle applied to the multi-cavity mold. As a result, there is an advantage of enabling mass production of high quality mass molded products.

In addition, since there is no need for a separate nozzle opening and closing adjustment work, it is possible to improve the workability, and the structure is simple, and there is an advantage that can significantly reduce the production cost while ensuring the reliability of the device. In particular, since the injection pressure of each nozzle can be precisely controlled independently using the resin pressure adjusting means, it is possible to mass-produce high-quality molded products by compensating for the uneven injection amount caused by the processing deviation between the nozzle and the manifold. And the processing freedom of the manifold can be greatly increased, which provides a useful effect to improve productivity.

1 is a cross-sectional view showing an injection molding machine valve device for a multi-cavity mold according to the prior art;

2 is a cross-sectional view showing an embodiment of a multi-cavity injection molding machine valve device according to the present invention;

3 is a cross-sectional view showing an open state of a nozzle in the multi-cavity injection molding machine valve device of FIG.

Figure 4 is a cross-sectional view showing a resin pressure control state in the injection molding machine valve device for the multi-cavity mold of Figure 2,

Figure 5 is a perspective view of the main part for explaining the resin pressure control means in the injection molding machine valve device for the multi-cavity mold of Figure 2;

6 and 7 are cross-sectional view of the nozzle heater block applied in the present invention,

8 is a cross-sectional view showing another embodiment of the present invention;

9 is a schematic view showing an example of connection of a timing belt in FIG. 8;

<Explanation of symbols for the main parts of the drawings>

10: manifold 10a: resin channel

10b: diameter reduction 20: nozzle

20a: resin channel 25: valve pin

30: driving means 31: stationary motor

32: screw shaft 33: drive pulley

34: driven pulley 35: timing belt

36: lifting plate 37: detector

40: resin pressure adjusting means 41: pressure adjusting pin

42: support 43: control post

50: heater block

Claims (4)

A manifold 10 having a branched resin channel for injecting a water support material into a multi-cavity mold; A plurality of nozzles 20 having a valve pin 25 of a length member positioned at a lower surface of the manifold 10 to receive resin and connected to a gate of a front end thereof and having a valve member 25 formed at an inner center thereof to open and close the gate by a lifting operation. )and; Fixed position in the upper side of the manifold 10 and the position displacement in the vertical direction in conjunction with the stationary motor 31 and the screw shaft 32 for rotating the screw shaft 32 protruding toward the manifold 10 A driving means 30 made of a lifting plate 36 which is screwed with the screw shaft 32 so as to have a plurality of valve pins 25 fixedly coupled to one side thereof; By adjusting the amount of resin passing through the nozzle 20, the valve pin 25 passes through the inner center, and the upper end is provided to be elevated by adjusting the screw, while the lower end is a diameter reducing part 10b in which the diameter of the resin channel is reduced. Resin pressure adjusting means (40) having a pressure adjusting pin (41) positioned on the; Injection molding machine valve device for a multi-cavity mold, characterized in that comprising a. According to claim 1, wherein the drive means 30 is provided on the upper and lower sides of the elevating plate 36 to limit the opening and closing position of the gate to detect the proximity of the elevating plate 36 to detect the stationary motor 31 Injection molding machine valve device for a multi-cavity mold, characterized in that it further comprises a detection unit 37 for intermittent driving. 3. The driving means (30) according to claim 1 or 2, wherein the driving means (30) is provided at a plurality of positions to balance the elevating plate (36) and the driving pulley (33) integrally provided on the output shaft of the stationary motor (31). Further comprising a driven pulley 33 integrally coupled to one side of each screw shaft 32 to be screwed, and a timing belt 35 for connecting the drive pulley 33 and the driven pulley 33 to rotate integrally Injection molding machine valve device for a multi-cavity mold, characterized in that configured to. The support 42 according to claim 1 or 2, wherein the resin pressure adjusting means 40 is fixedly installed on the upper surface of the manifold 10, and a portion of the upper end of the pressure adjusting pin 41 is screwed through. ) And a control post 43 that is interlocked with a worm gear on the upper outer circumference of the pressure control pin 41 protruding upward of the support 42 to receive the operator's manipulation force and to interlock the pressure control pin 41. , The nozzle 20 is an injection molding machine valve device for a multi-cavity mold, characterized in that the outer circumference is inserted into the installation hole of the heater block 50 made of at least one metal plate material with a heater that is a heating element to prevent the hydration of the resin. .