CN212579124U - Liquid silica gel valve needle system - Google Patents
Liquid silica gel valve needle system Download PDFInfo
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- CN212579124U CN212579124U CN202020643328.6U CN202020643328U CN212579124U CN 212579124 U CN212579124 U CN 212579124U CN 202020643328 U CN202020643328 U CN 202020643328U CN 212579124 U CN212579124 U CN 212579124U
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- valve needle
- valve
- electric cylinder
- needle
- liquid silicone
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Abstract
The utility model discloses a liquid silica gel needle system, needle system include driver, drive assembly and mould subassembly, wherein mould subassembly further includes a plurality of needles, runner plate, runner nozzle and has the mould benevolence of a plurality of die cavitys, and every die cavity has an injection hole, and each of a plurality of needles corresponds to one in a plurality of die cavities respectively, and the needle is relative in the first direction the injection hole of die cavity moves between open position and closed position; wherein the actuator is an electric cylinder actuator and the transmission assembly transmits the driving force generated by the electric cylinder actuator to the valve needle. According to the utility model discloses a liquid silica gel needle system can make the needle remove more steadily, the noise is littleer, can control the degree of opening of needle moreover more accurately.
Description
Technical Field
The utility model relates to a liquid silica gel shaping technical field, more specifically, the utility model relates to a many valves needle actuating system for use in silica gel shaping.
Background
The liquid silica gel product is widely applied to various industries such as electronics, automobiles, medical treatment and the like. The liquid silica gel product can be produced by injection molding, mass, rapid vulcanization and repeated machinery, and has good thermal stability, cold resistance, excellent electrical insulation property, no toxic substances during combustion and the like.
The liquid silicone material has a high expansion coefficient, expands when heated, and slightly contracts when cooled, so that a cold runner is usually adopted in a liquid silicone valve needle system to process the liquid silicone material so as to keep the liquid silicone material at a low temperature and fluidity, the cold runner adopts a closed system, and in an injection cycle, the closed system adopts a 'glue sealing needle' or a 'valve needle' in each runner to control the accurate metering of the liquid silicone material.
In order to improve the production efficiency of the liquid silicone rubber product, a multi-cavity mold is usually used to produce the silicone rubber product, i.e., one mold defines a plurality of cavities. Correspondingly, a plurality of valve pins and cold runner nozzles are also provided in the valve pin system, corresponding to each mold cavity. The valve needles and the cold runner nozzles are controlled in a unified manner. Currently, a cylinder is used to control the opening and closing of a valve needle relative to a mold cavity injection port.
However, in such a multi-cavity mold, the valve pins must be opened and closed simultaneously during injection molding, or the problem of unbalanced injection of the resin tends to occur. The existing equipment adopts an air cylinder, and a plurality of sets of air cylinder assemblies exist for a multi-cavity die, and the existing equipment has some problems. On the one hand, the end of each valve needle is equipped with a cylinder assembly, and therefore the entire drive assembly is bulky. On the other hand, liquid silicone is a material with particularly good fluidity, and the flow of the material occurs even in a very small gap, so that the requirement on the precision of the mold is extremely high, but the motion synchronism of the existing multi-set cylinders is insufficient, and the movement amount of the valve needle cannot be accurately controlled. In addition, the valve needle system using the cylinder driving has poor expandability due to the limitation of the cylinder pressure and the complexity of the structure.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides a liquid silicone valve needle system, the silicone valve needle system comprises a driver, a transmission component and a molding component, wherein the molding component further comprises a plurality of valve needles, a runner plate, a runner nozzle and a mold core with a plurality of mold cavities, each mold cavity is provided with an injection hole, each of the valve needles corresponds to one of the mold cavities respectively, and the valve needles move between an opening position and a closing position relative to the injection holes of the mold cavities in a first direction; wherein the actuator is an electric cylinder actuator and the transmission assembly transmits the driving force generated by the electric cylinder actuator to the valve needle.
According to one aspect of the invention, the electric cylinder drive applies the driving force in a second direction perpendicular to the first direction, and the transmission assembly is configured to convert the driving force applied in the second direction into a driving force in the first direction to move the needle.
According to another aspect of the invention, the transmission assembly comprises a pull rod and a cam mechanism acting with the pull rod, one end of the pull rod being connected to the drive member of the electric cylinder drive.
According to a further aspect of the invention, the cam mechanism comprises a cam groove fixed to the draw bar or integrally formed in the draw bar and a follower fixed with respect to the needle, the follower being capable of reciprocating along the cam groove when the electric cylinder driver is actuated.
According to the utility model discloses a further aspect, liquid silicone mold system includes a plurality ofly the pull rod, it is a plurality of pull rod parallel arrangement is a plurality of the needle is arranged between two adjacent pull rods.
According to the utility model discloses a further aspect, it is a plurality of the needle is fixed on same needle fixed plate, the follower is relative the needle fixed plate is fixed.
According to a further aspect of the invention, the cam groove includes a first parallel section and a second parallel section along the second direction and an inclined section between the first parallel section and the second parallel section, the first parallel section and the second parallel section being staggered in the first direction.
According to a further aspect of the invention, the one end of pull rod along the second direction is connected to the electric cylinder, the other end of pull rod is equipped with connecting portion, connecting portion are constructed into the one end of connecting another pull rod.
According to a further aspect of the invention, the system further comprises a fixing base, with the aid of which the electric cylinder drive is fixedly mounted.
The technical scheme of the utility model adopt the electric cylinder driver to replace original cylinder driver, owing to not influenced by the atmospheric pressure, the needle removes more steadily, the noise is little, can control the degree of opening of needle more accurately moreover. The consistency of the movement of the valve needle fixed on the same fixed plate under the action of the transmission component can be ensured. Moreover, the spacing of the valve needles can be set relatively smaller, since no cylinder body is present.
Furthermore, according to the utility model discloses an among the system especially the electric jar work only need regularly annotate the fat lubrication under the environment of complicacy, does not have vulnerable part, and the maintenance of system is more convenient, and maintenance cost reduces.
According to the utility model discloses a liquid silica gel needle system scalability is strong, in electric jar driver power range, only need simply installation procedure alright increase the needle wantonly. In addition, the setting of the valve needle opening degree can be easily realized by selecting cam grooves with different shapes.
Drawings
For a more complete understanding of the present invention, reference is made to the following description of exemplary embodiments, which is to be considered in connection with the accompanying drawings, in which:
fig. 1 is a perspective view of a liquid silicone mold valve needle system according to a preferred embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a pull rod detail in the transmission assembly of the liquid silica needle system according to the preferred embodiment of the present invention.
Fig. 3 is an enlarged partial cross-sectional view of the molded portion of the gradually liquid silicone needle system in accordance with a preferred embodiment of the present invention.
Reference numerals
10 liquid silica gel valve needle system
20 electric cylinder driver
30 fixed seat
50 drive assembly
51 draw bar
511 connection part
53 cam groove
531 first parallel section
532 second parallel section
533 inclined section
54 driven member
60 molded assembly
61 valve needle
62 flow passage plate
63 Cold runner nozzle
64 mold core
65 valve needle fixing plate
Detailed Description
The present invention will be further described with reference to the following embodiments and drawings, and more details will be set forth in the following description in order to provide a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in various other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions according to the actual application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the embodiments.
Fig. 1 shows a perspective view of a liquid silicone valve needle system 10 according to a preferred embodiment of the present invention with a portion of the parts removed to expose a portion of the valve needle for clarity of internal structure. The liquid silicone valve needle system 10 basically includes an electric cylinder driver 20, a transmission assembly 50 and a molding assembly 60. The cylinder actuator 20 is connected to the transmission assembly 50, and the transmission assembly 50 is further connected to the valve pin 61 in the molding assembly 60 to reciprocate them during the molding process.
As shown in fig. 2 and 3, the molding assembly 60 further includes a plurality of valve pins 61 arranged in an array, a runner plate 62 for providing a runner for molding material, a cold runner nozzle 63, and a core 64 having a plurality of cavities. In the valve needle system 10 shown in fig. 1, 32 identical valve needles 61 are provided, and the 32 valve needles 61 are arranged in an array of 4 rows and 8 columns.
According to the present invention, the electric cylinder driver 20 is used to provide the needle 61 with a driving force, which is connected to the needle 61 through the transmission assembly 50, so that each needle 61 is movable relative to the molding assembly 60 in the axial direction of the needle 61. During the molding process, each valve pin 61 is moved between an open position and a closed position with respect to the sprue of each mold cavity by the electric cylinder driver 20, and in actual use, the amount of movement of these two positions in the axial direction is approximately 2-6 mm, and in the preferred embodiment, the displacement amount of the valve pin 61 in the axial direction thereof is set to 4 mm.
As shown in fig. 1, the electric cylinder driver 20 is disposed on one side of the molding assembly 60 in a lateral direction perpendicular to the axial direction. In other words, the electric cylinder drive 20 exerts a driving force in the lateral direction, which is in turn converted by the transmission assembly 50 into a driving force in the axial direction acting on the valve needle 61. In the preferred embodiment, the electric cylinder actuator 20 further includes an anchor block 30, by means of which anchor block 30 the electric cylinder actuator 20 is mounted in a fixed position relative to the mold assembly 60.
The electric cylinder driver 20 is generally a modular product in which a servo motor is integrated with a lead screw assembly, and the lead screw assembly converts a rotational motion of the servo motor into a linear motion in the electric cylinder driver 20. The electric cylinder driver 20 can control the driving position, the applied driving force, and the driving speed of the valve needle in the system more precisely than the conventional valve needle system using an air cylinder.
Next, the transmission assembly 50 and the molding assembly 60 in the liquid silicone valve needle system 10 will be described with reference to fig. 2 and 3. Fig. 2 shows a detail of the tie rod used in the drive assembly 50, while fig. 3 shows the valve needle 61 located in the cold runner nozzle. The molding assembly 60 shown in fig. 3 has a valve pin 61 in a closed position relative to a mold core 64.
In the molding assembly 60, the needle 61 passes through the needle fixing plate 65, the runner plate 62, and the cold runner nozzle 63 in this order from top to bottom until the tip-shaped end of the needle abuts against the injection port of the mold core 64. The valve pin system of the preferred embodiment provides 32 valve pins, of which 8 valve pins 61 in a group are supported on the same valve pin fixing plate 65 and share one runner plate 62. The runners in the runner plate 62 communicate with the runners in the cold runner nozzle 63 to deliver the silicone material in liquid form from a source of molding material (not shown) to the film core 64.
The transmission assembly 50 is interposed between the molding assembly 60 and the electric cylinder driver 20. In the preferred embodiment, the drive assembly 50 includes a lever 51 and a cam mechanism. One end of the pull rod 51 is connected to the driving part of the electric cylinder driver 20. Usually, at least two tie rods 51 are provided, which are arranged parallel and spaced apart at a distance on both sides of the plurality of valve needles 61. The rod 51 extends parallel to the direction of application of the force of the electric cylinder drive 20. In the preferred embodiment shown in fig. 1, three tie rods 51 are provided, arranged in parallel at equal intervals, and a set of valve needles 61 is arranged between each two adjacent tie rods 51. It should be understood that the number and arrangement of the pull rods 51 are not limited thereto, and they may be appropriately set according to the number and arrangement of the valve needles 61 and the power of the valve needle system.
In the preferred embodiment, the cam mechanism includes a cam groove 53 and a follower 54 fixed relative to the valve needle 61. During the molding process, the follower 54 can reciprocate along the cam groove 53 in accordance with the reciprocating action of the driving member of the electric cylinder driver 20.
In the preferred embodiment of the present invention, the cam groove 53 is formed directly in the pull rod 51. It is envisaged that in alternative embodiments thereof, the cam mechanism is not integral with the pull rod 51, but may be an additional cam member connected to the pull rod 51.
The particular shape of the cam slot 53 determines the amount of movement of the drawbar 51 and the valve needle 61. As shown in fig. 2, the cam groove 53 includes first and second parallel sections 531, 532, and an inclined section 533 between the first and second parallel sections 531, 532, the first and second parallel sections 531, 532 being displaced in the axial direction of the valve needle 61. The distance between the two parallel sections 531, 532 is the distance the valve needle 61 moves, when the follower 54 is in the upper first parallel section 531, the valve needle 61 is in the open position, and when the follower 54 is in the lower first parallel section 531, the valve needle 61 is in the closed position. The first and second parallel sections 531, 532 extend substantially parallel to the direction of application of the force by the electric cylinder driver 20 and also substantially parallel to the direction of extension of the tie rod 51. The first parallel section 531, the inclined section 533, and the second parallel section 532 are smoothly connected so that the follower 54 can smoothly slide therein. It will be appreciated that the angle of the inclined segment 533 of the cam slot 53 relative to the parallel segment may be designed according to the desired amount of movement, the power of the electric cylinder actuator 20.
Furthermore, one end of the pull rod 51 of the liquid silicone valve needle system 10 shown in fig. 1 is connected to the driving member of the electric cylinder driver 20, while the opposite end may preferably be provided with a connection portion 511. The connection 511 may be configured to mate with a connection on the end of the other tension rod 51. This configuration enables scalability of the molding assembly 60. In some applications, it may be desirable to increase the number of mold cavities, and correspondingly, the number of valve pins 61 in the molded component 60. In the valve needle system 10 according to the present invention, when the valve needle 61 needs to be added, under the condition that the power of the electric cylinder driver 20 is sufficient, a set of pull rods 51 can be attached to one end of the pull rods 51 far away from the electric cylinder driver 20 along the extending direction thereof, and particularly, another set of molding assembly 60 (including a valve needle fixing plate, a valve needle and a cold runner nozzle) can be connected through the connecting portion, so that the original valve needle system can be very conveniently expanded or modified.
The technical scheme of the utility model adopt electric cylinder driver 20 to replace original cylinder driver, owing to not influenced by the atmospheric pressure, needle 61 removes more steadily, the noise is littleer, can control needle 61 more accurately moreover beat the aperture. The consistency of the movement of the valve needle 61 fixed to the same valve needle fixing plate 65 under the action of the transmission assembly 50 is ensured. Moreover, since there is no cylinder body, the pitch of the valve needles 61 can be set relatively smaller
Furthermore, according to the utility model discloses an among the system 10 especially the electric cylinder works under complicated environment and only needs the lubrication of regular notes fat, does not have wearing parts, and the maintenance of system 10 is more convenient, and maintenance cost reduces.
According to the utility model discloses a liquid silica gel needle system 10 scalability is strong, in electric cylinder driver 20 power range, only need simply installation procedure alright increase needle 61 wantonly. Further, the setting of the valve needle opening degree can be easily achieved by selecting the cam groove 53 of a different shape.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (9)
1. A liquid silicone valve pin system comprising a driver, a transmission assembly and a molding assembly, wherein the molding assembly further comprises a plurality of valve pins, a runner plate, a runner nozzle and a mold core having a plurality of mold cavities, each mold cavity having an injection hole, each of the plurality of valve pins corresponding to a respective one of the plurality of mold cavities, the valve pins moving in a first direction relative to the injection holes of the mold cavities between an open position and a closed position;
characterised in that the actuator is an electric cylinder actuator and the transmission assembly transmits the actuating force generated by the electric cylinder actuator to the valve needle.
2. The liquid silicone valve needle system of claim 1, wherein said electric cylinder actuator applies said actuating force in a second direction perpendicular to said first direction;
the transmission assembly is configured to convert the driving force applied in the second direction into a driving force in the first direction to move the valve needle.
3. The liquid silicone valve needle system of claim 1, wherein the transmission assembly comprises a pull rod and a cam mechanism acting with the pull rod, and one end of the pull rod is connected to a driving member of the electric cylinder driver.
4. A liquid silica gel valve needle system as claimed in claim 3, wherein said cam mechanism includes a cam groove fixed to or integrally formed in said pull rod and a follower fixed relative to said valve needle, said follower being capable of reciprocating along said cam groove when said electric cylinder driver is actuated.
5. The liquid silicone valve needle system of claim 3, wherein the liquid silicone mold system comprises a plurality of the pull rods, the plurality of pull rods are arranged in parallel, and the plurality of the valve needles are arranged between two adjacent pull rods.
6. The liquid silicone valve needle system of claim 4, wherein a plurality of said valve needles are fixed to a same valve needle retaining plate, said follower being fixed relative to said valve needle retaining plate.
7. The liquid silicone valve pin system of claim 4, wherein said cam slot comprises first and second parallel sections along a second direction perpendicular to said first direction and an angled section between said first and second parallel sections, said first and second parallel sections being offset in the first direction.
8. The liquid silicone valve needle system of claim 3, wherein one end of the pull rod in a second direction perpendicular to the first direction is connected to the electric cylinder driver, and the other end of the pull rod is provided with a connecting portion configured to connect to one end of another pull rod.
9. The liquid silica gel valve needle system of claim 1, further comprising a fixed seat by which the electric cylinder actuator is fixedly mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020643328.6U CN212579124U (en) | 2020-04-24 | 2020-04-24 | Liquid silica gel valve needle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020643328.6U CN212579124U (en) | 2020-04-24 | 2020-04-24 | Liquid silica gel valve needle system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212579124U true CN212579124U (en) | 2021-02-23 |
Family
ID=74648410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020643328.6U Active CN212579124U (en) | 2020-04-24 | 2020-04-24 | Liquid silica gel valve needle system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212579124U (en) |
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2020
- 2020-04-24 CN CN202020643328.6U patent/CN212579124U/en active Active
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