CN215320326U - Sliding valve for injection molding - Google Patents
Sliding valve for injection molding Download PDFInfo
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- CN215320326U CN215320326U CN202121245350.6U CN202121245350U CN215320326U CN 215320326 U CN215320326 U CN 215320326U CN 202121245350 U CN202121245350 U CN 202121245350U CN 215320326 U CN215320326 U CN 215320326U
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- main body
- cylinder
- valve core
- cavity
- compression spring
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Abstract
The sliding valve for injection molding comprises a main body, a valve core, a connecting piece, a compression spring and a guide piece, wherein the middle of the main body comprises a discharge port, a melting material cavity and a flow channel of a cylindrical guide hole, a plurality of spring cavities are arranged on the outer side of the cylindrical guide hole, one end of the compression spring is limited by a closed end of the spring cavity, the other end of the compression spring is limited by one end of the guide piece inserted into an open end of the spring cavity, and the other end of the guide piece is connected with the connecting piece; the valve core main body comprises a cylinder and a step, the middle of the cylinder comprises a main channel and a plurality of sub-channels communicated with the main channel, and the tail part of the valve core main body is connected with a connecting piece; the cylinder is arranged in the cylindrical guide hole, and when the cylinder moves forwards in the cylindrical guide hole until the step of the cylinder is limited by the main body, the branch channel in the cylinder is communicated with the melt cavity of the main body; meanwhile, the valve core drives the guide piece to move forwards through the connecting piece so as to compress the compression spring; when the compression spring returns to enable the limiting part to drive the valve core to return to the original state through the adapter part, the branch channel is disconnected with the melt cavity.
Description
Technical Field
The utility model relates to a component of an injection molding machine, in particular to a slide valve for injection molding.
Background
The middle template of the stack mold is a hot runner, and materials are filled into cavities on two sides during injection molding, and then the mold is cooled and opened to take materials. The production efficiency is high when the stack mold injection molding is used, and when the same model injection molding machine is used, the number of the mold cavities can be greatly increased under the condition of length permission, and the production efficiency is improved.
However, the stack mold has a certain disadvantage that the nozzle is pressed against the intermediate mold plate, the nozzle must be separated from the intermediate mold plate before mold opening, melt pressure exists in the hot runner, the plastic melt overflows from the sprue and the mold, waste materials are generated in the process, and the working environment is polluted.
When the mold is opened, the melt in the hot runner overflows to the cavity due to internal pressure, so that the mold cannot be closed to cause production interruption, or waste products are generated even when the next mold is produced by closing the mold.
Secondly, the position of the pouring gate also has the leakage of sizing material, which wastes raw materials and increases the cost, and the subsequent treatment of waste materials also causes additional burden to the environment.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned shortcomings of the prior art, and an object of the present invention is to provide a slide valve for injection molding, which can be installed on an intermediate mold plate of a stack mold to prevent leakage of a material during injection molding.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
injection moulding uses the slide valve, its characterized in that: the device comprises a main body, a valve core, a connecting piece, a compression spring and a guide piece, wherein the middle of the main body comprises a discharge hole, a melting material cavity and a cylindrical guide hole, a plurality of spring cavities capable of containing the compression spring are arranged on the outer side of the cylindrical guide hole of the main body, the compression spring is arranged in the spring cavity, one end of the compression spring is limited by a closed end of the spring cavity, the other end of the compression spring is limited by one end of the guide piece inserted into an open end of the spring cavity, and the other end of the guide piece is connected with the connecting piece; the valve core main body comprises a cylinder with the diameter the same as that of the cylindrical guide hole of the main body and a step higher than the cylinder, the middle of the cylinder comprises a main channel and a plurality of sub-channels communicated with the main channel, and the tail part of the valve core main body is connected with a connecting piece; the cylinder of the valve core is arranged in the cylindrical guide hole, when the cylinder moves forwards in the cylindrical guide hole until the step of the cylinder is limited by the main body, the branch channel in the cylinder of the valve core is communicated with the melt cavity of the main body, namely the sliding valve is in an open state; meanwhile, the valve core drives the guide piece to move forwards through the connecting piece so as to compress the compression spring; after the cylinder of the valve core loses power, the compression spring returns to enable the guide piece to drive the cylinder of the valve core to return to the original state through the connecting piece, the branch channel in the cylinder is disconnected with the melt cavity of the main body, and the sliding valve is in a closed state.
Preferably, the opening end of the spring cavity is in threaded connection with the inner end of the guide sleeve, the compression spring is arranged in the spring cavity, one end of the compression spring is limited by the closed end of the spring cavity, the other end of the compression spring extends into the inner cavity of the guide sleeve and is limited by one end of a guide pillar extending into the inner cavity of the guide sleeve, the end of the guide pillar is limited by the outer end of the guide sleeve, and the other end of the guide pillar is fixed with the flange. Therefore, the guide effect is good, and the connection between the components is convenient.
Preferably, the tail part of the valve core main body is in threaded connection with the connecting piece, so that the valve core is convenient to assemble and disassemble.
Preferably, the heating ring is arranged on the outer contour of the main body and connected with the temperature measuring and controlling unit, and the main body is heated and the temperature is controlled through the temperature measuring and controlling unit, so that the plastic in the main body can better flow.
Preferably, the outer contour of the main body is cylindrical, and a heating ring and a temperature measuring and controlling unit are arranged on the outer side of the cylindrical main body, so that the heating ring is convenient to arrange.
Preferably, the connecting piece is provided with a surrounding part connected with the inlet of the valve core, a flow channel is arranged in the surrounding part, the outer end port of the flow channel is in threaded connection with the sealing piece and is provided with an inlet, a return spring and a ball are arranged in the flow channel, one end of the return spring is limited by one end limited by the flow channel, the other end of the return spring is limited by the ball, the ball is enabled to seal the inlet of the sealing piece, and the outlet of the flow channel is communicated with the inlet of the main channel of the valve core.
Preferably, the connecting member is a flange.
Compared with the prior art, the slide valve can be arranged on the middle template of the stack mold, the middle template and the slide valve can move together when the mold is opened, the valve core of the slide valve keeps a certain distance from the nozzle and then is released, so that the pressure in the runner is released, no material seeps out when the nozzle is released, and the material seeps out from the cavity because the pressure is relieved by the slide valve in advance, so that the raw material can be saved, the environment can be protected, and the production can not be interrupted due to the influence on mold closing.
Still because the built-in compression spring can keep the spring cavity clean in the use, avoids the spring to lose efficacy because of foreign matter or plastic parcel.
Drawings
FIG. 1 is a schematic view of a slide valve for injection molding in a valve-closed state according to embodiment 1 of the present invention.
FIG. 2 is a schematic view showing the structure of a slide valve for injection molding in an open state according to example 1 of the present invention.
FIG. 3 is a schematic structural view of a slide valve for injection molding in a valve-closed state according to embodiment 2 of the present invention.
Fig. 4 is a schematic structural view of the stack mold according to embodiment 2 of the present invention.
Fig. 5 is a schematic view of embodiment 2 of the present invention in a mold clamping state.
FIGS. 6 and 7 are schematic views of injection molding processes according to example 2 of the present invention.
Detailed Description
The utility model will be further described with reference to the following drawings and examples.
As shown in fig. 1 to 7, the slide valve for injection molding includes a main body 1, a valve core 2, a flange 4, a compression spring 5, a plug screw guide 6, a guide post 7, a screw 8, a heating ring 9, and a temperature measuring and controlling unit.
The main part 1 includes a left discharge gate 11, the middle diameter is greater than cylindrical guiding hole's melt chamber 12, the cylindrical guiding hole 13 on right side, evenly sets up a plurality of spring chamber 14 that can hold compression spring 5 along the circumference on the main part 1 in the cylindrical guiding hole 13 outside.
The main body of the valve core 2 is a cylinder 24 with the diameter same as that of the cylindrical guide hole 13 of the main body 1 and a step 23 connected with the cylinder 24 and higher than the cylinder, the middle of the cylinder 24 comprises a main channel 21 and a plurality of branch channels 22 communicated with the main channel 21, and the tail part of the valve core 2 is provided with threads and is in threaded connection with the flange 4 through the threads.
The opening end of the spring cavity 14 is in threaded connection with the inner end of the guide sleeve 6, the compression spring 5 is arranged in the spring cavity 14, one end of the compression spring 5 is limited by the closed end of the spring cavity 14, the other end of the compression spring 5 extends into the inner cavity of the guide sleeve 6 and is limited by one end 71 of the guide post 7 extending into the inner cavity of the guide sleeve 6, the end 71 of the guide post 7 is limited by the outer end 61 of the guide sleeve 6, and the other end of the guide post 7 is fixed with the flange 4 through a screw 8.
The cylinder 24 of the valve core 2 is placed in the cylindrical guide hole 13, when the cylinder 24 moves forward in the cylindrical guide hole 13 until the step 23 is limited by the main body, the branch channel 22 in the cylinder 24 of the valve core 2 is communicated with the melt chamber 12 of the main body, i.e. the sliding valve is in an open state, see fig. 2, and at the same time, the cylinder 24 drives the guide post 7 forward through the flange 4 to compress the compression spring 5. When pressure on the valve core 2 is lost, the compression spring 5 is reset to enable the guide post 7 to move backwards and drive the cylinder 24 of the valve core 2 to return to the original state backwards through the flange 4, at the moment, the branch channel 22 in the cylinder 24 is disconnected with the melt cavity 12 of the main body, namely, the sliding valve is in a closed state, which is shown in fig. 1.
Set up heating ring 9 on the main part 1 outline, heating ring 9 is connected with temperature measurement and control unit, and like this, accessible temperature measurement and control unit heating main part 1 and control temperature make the material in the main part 1 flow more easily, and the main part 1 outline of this embodiment is cylindrical, and the cylindrical outside sets up heating ring 9, more conveniently sets up the heating ring like this.
Example 2
The flange 4 of the embodiment 1 is partially modified, the tail part of the flange 4 is provided with an enclosing part 41 which is sealed with the tail part of the valve core 2 of the embodiment 1, a flow channel 45 is arranged in the enclosing part 41, the outlet of the flow channel 45 is communicated with the inlet of the valve core 2, a check valve assembly is arranged in the flow channel 45 and is used for preventing molten plastic in a channel 21 of the valve core 2 from remaining, and the inlet of the flow channel 45 can be connected with an injection molding nozzle.
Specifically, a flow channel 45 is arranged in the surrounding part 41 of the flange 4 and the inlet of the valve core 2, the outer end port of the flow channel 45 is in threaded connection with a sealing piece 46 and is provided with an inlet 461, a return spring 43 and a ball 44 are arranged in the flow channel, one end of the return spring 43 is limited by one end of the flow channel limiting part 45, the other end of the return spring 43 is limited by the ball 44, the ball 44 seals the inlet 461 of the sealing piece 46, and the outlet of the flow channel 45 is communicated with the inlet of the main channel 21 of the valve core 2. Thus, when the liquid in the nozzle enters the inlet 461 of the closure 46, the ball 44 is pressed and the inlet is opened and passes through the flow passage and into the flow passage of the core for proper injection. When the injection is stopped, the return spring 43 is returned to seal the inlet 461 of the sealing member 46 with the ball 44, so that the molten plastic in the main passage 21 of the valve element 2 cannot flow out.
As shown in fig. 4, the stack mold includes a movable mold plate 31, an intermediate mold plate 32, and a fixed mold plate 33, the movable mold plate 31, the intermediate mold plate 32, and the fixed mold plate 33 are arranged from left to right, the intermediate mold plate 32 includes a hot runner, and a slide valve is installed in front of a hot runner gate of the intermediate mold plate 32 by a screw thread at a head of a main body thereof.
In the injection molding, the first step is mold clamping, and the movable mold plate 31, the intermediate mold plate 32 and the fixed mold plate 33 are combined together, as shown in fig. 5.
In a second step, the injection molding machine nozzle 10 is moved against the slide valve, as shown in FIG. 6, while the slide valve is still closed.
Third, the nozzle 10 of the injection molding machine is abutted against the slide valve to push the valve core 2, the valve core 2 drives the flange 4 to move, then the spring is compressed by the guide post 4 fixedly connected with the flange 4, the valve core is limited when moving to the position where the boss of the valve core is contacted with the rear end of the main body 1, the branch channel 22 in the cylinder 24 is communicated with the melt cavity 12 of the main body, namely the slide valve is in an open state, as shown in fig. 7, therefore, the material sprayed out from the nozzle of the injection molding machine is injected into the middle template through the branch channel 22 of the slide valve, the melt cavity 12 and the discharge hole 11.
And fourthly, injecting, maintaining pressure and cooling.
And fifthly, disconnecting the nozzle of the injection molding machine, closing the slide valve and resetting to the state shown in figure 5.
Sixthly, opening the mold to take materials, as shown in the state of figure 4.
Claims (7)
1. Injection moulding uses the slide valve, its characterized in that: the device comprises a main body, a valve core, a connecting piece, a compression spring and a guide piece, wherein the middle of the main body comprises a discharge hole, a melting material cavity and a flow channel of a cylindrical guide hole; the valve core main body comprises a cylinder with the diameter the same as that of the cylindrical guide hole of the main body and a step higher than the cylinder, the middle of the cylinder comprises a main channel and a plurality of sub-channels communicated with the main channel, and the tail part of the valve core main body is connected with a connecting piece; the cylinder of the valve core is arranged in the cylindrical guide hole, and when the cylinder moves forwards in the cylindrical guide hole until the step of the cylinder is limited by the main body, the branch channel in the cylinder of the valve core is communicated with the melt cavity of the main body; meanwhile, the valve core drives the guide piece to move forwards through the connecting piece so as to compress the compression spring; after the cylinder of the valve core loses power, the compression spring returns to enable the guide piece to drive the cylinder of the valve core to return to the original state through the connecting piece, and the branch channel in the cylinder is disconnected with the melt cavity of the main body.
2. A slide valve for injection molding according to claim 1, wherein: the opening end of the spring cavity is in threaded connection with the inner end of the guide sleeve, the compression spring is arranged in the spring cavity, one end of the compression spring is limited by the closed end of the spring cavity, the other end of the compression spring extends into the inner cavity of the guide sleeve and is limited by one end of a guide pillar extending into the inner cavity of the guide sleeve, the end of the guide pillar is limited by the outer end of the guide sleeve, and the other end of the guide pillar is fixed with the flange.
3. A slide valve for injection molding according to claim 1 or 2, characterized in that: the tail of the valve core main body is in threaded connection with the connecting piece.
4. A slide valve for injection molding according to claim 1 or 2, characterized in that: the outer contour of the main body is provided with a heating ring, the heating ring is connected with a temperature measuring and controlling unit, and the main body is heated and the temperature is controlled through the temperature measuring and controlling unit.
5. A slide valve for injection molding according to claim 3, wherein: the outer contour of the main body is cylindrical.
6. A slide valve for injection molding according to claim 1 or 2, characterized in that: the connecting piece is provided with a surrounding part connected with the inlet of the valve core, a flow channel is arranged in the surrounding part, the outer end port of the flow channel is in threaded connection with the sealing piece and is provided with an inlet, a reset spring and a ball are arranged in the flow channel, one end of the reset spring is limited by one limited end of the flow channel, the other end of the reset spring is limited by the ball, the ball is enabled to seal the inlet of the sealing piece, and the outlet of the flow channel is communicated with the inlet of the main channel of the valve core.
7. A slide valve for injection molding according to claim 6, wherein: the connecting piece is a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121245350.6U CN215320326U (en) | 2021-06-04 | 2021-06-04 | Sliding valve for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121245350.6U CN215320326U (en) | 2021-06-04 | 2021-06-04 | Sliding valve for injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215320326U true CN215320326U (en) | 2021-12-28 |
Family
ID=79551003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121245350.6U Active CN215320326U (en) | 2021-06-04 | 2021-06-04 | Sliding valve for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215320326U (en) |
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2021
- 2021-06-04 CN CN202121245350.6U patent/CN215320326U/en active Active
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