Injection molding device for producing heat-conducting silica gel pad

Abstract

The utility model relates to the technical field of silica gel pad production, and disclose a kind of injection molding device for heat-conducting silica gel pad production, the injection molding device for heat-conducting silica gel pad production, including bottom plate, fixed mounting is equipped with mounting bracket on the bottom plate, injection molding assembly is provided on the mounting bracket, and the injection molding assembly includes injection molding lower mould.This injection molding device for heat-conducting silica gel pad production, in order to make the device satisfy the demand of precision and efficiency to batch production, by setting injection molding assembly, the component cooperation hydraulic device pushes and drops pressing plate, drives injection molding upper mould gradually close to injection molding lower mould, spring rod provides buffer force in instant of closing mould, avoid rigid collision to cause mould damage, sealing strip of injection molding upper mould is accurately embedded in sealing groove of injection molding lower mould, form closed injection molding space, prevent silica gel raw material leakage, limiting rod on mounting plate slides along limiting ring, limiting plate limits the maximum drop distance of injection molding upper mould, avoid injection molding upper mould excessive drop.

Description

Technical Field

[0001] This utility model relates to the field of silicone pad production technology, specifically to an injection molding device for producing thermally conductive silicone pads. Background Technology

[0002] In the field of electronic device heat dissipation, thermally conductive silicone pads have become the core heat dissipation medium for components such as chips, power modules, and LED lights due to their excellent thermal conductivity, insulation, and flexibility. Their molding precision and surface flatness directly affect heat dissipation efficiency. The injection molding unit consists of a silicone melt conveying system, a precision injection mold, a temperature control module, an automatic demolding mechanism, and a PLC control system. The molten thermally conductive silicone is conveyed to the injection mold cavity by a screw, and vulcanization is completed under the set temperature and pressure. After cooling, the automatic demolding mechanism ejects the product, which then enters the subsequent cutting and inspection processes.

[0003] However, the above-mentioned equipment has obvious shortcomings in use. Traditional injection molding devices rely solely on the cylinder to push the mold closed, resulting in rigid contact between the upper and lower molds. After long-term use, the mold edges deform, the mold gap increases, and silicone raw materials easily leak from the gap. This not only wastes raw materials but also requires cleaning the leaked material, leading to production interruptions. In view of this, we propose an injection molding device for the production of thermally conductive silicone pads. Utility Model Content

[0004] The purpose of this invention is to provide an injection molding device for producing thermally conductive silicone pads, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An injection molding apparatus for producing thermally conductive silicone pads includes a base plate, on which a mounting frame is fixedly mounted. An injection molding assembly is mounted on the mounting frame, the injection molding assembly comprising: The lower injection mold is fixedly installed on the base plate. A sealing groove is provided on the lower injection mold. A hydraulic device is fixedly installed on the mounting bracket. A pressing plate is fixedly installed on the piston end of the hydraulic device. A spring rod is fixedly installed on the pressing plate. The upper injection mold is fixedly installed at the other end of the spring rod. A sealing strip is fixedly installed on the upper injection mold. A circular groove is opened on the upper injection mold. One end of the feed pipe is fixedly installed on the lower injection mold. A connector is fixedly installed at the other end of the feed pipe. An installation plate is fixedly installed on the upper injection mold. A limit ring is fixedly installed on the mounting bracket. One end of a limit rod is fixedly installed on the installation plate, and a limit plate is fixedly installed at the other end of the limit rod.

[0006] In a further embodiment, multiple sets of the spring rod, mounting plate, limiting ring, limiting rod, and limiting plate are provided.

[0007] In a further embodiment, the upper injection mold and the sealing strip are positioned above the lower injection mold and the sealing groove, with the sealing strip positioned directly above the sealing groove.

[0008] In a further embodiment, the limiting rod slides inside the limiting ring, and the limiting plate is positioned above the limiting ring.

[0009] In a further embodiment, the upper injection mold is provided with a demolding assembly, which includes an air pump. The air pump is fixedly installed on the upper injection mold, a rubber pad is fixedly installed on the pressing plate, a conical groove is opened on the upper injection mold, and a filter plate is fixedly installed inside the upper injection mold.

[0010] In a further embodiment, the filter plates are provided in multiple sets, with the holes on the multiple sets of filter plates arranged in an alternating manner, and the multiple sets of filter plates are disposed inside a conical groove.

[0011] In a further embodiment, the rubber pad is positioned directly above the air pump, the air pump outlet is connected to a conical groove, and the small hole in the conical groove is connected to the interior of the upper injection mold.

[0012] Compared with the prior art, this utility model provides an injection molding device for producing thermally conductive silicone pads, which has the following advantages: 1. This injection molding device for producing thermal conductive silicone pads is equipped with an injection molding component to meet the precision and efficiency requirements of mass production. This component, in conjunction with a hydraulic device, pushes the pressing plate downward, causing the upper injection mold to gradually approach the lower injection mold. A spring rod provides a buffer force at the moment of mold closing to avoid damage to the mold due to rigid collision. The sealing strip of the upper injection mold is precisely embedded in the sealing groove of the lower injection mold to form a sealed injection space and prevent silicone material leakage. The limiting rod on the mounting plate slides along the limiting ring, and the limiting plate limits the maximum descent distance of the upper injection mold to prevent excessive descent of the upper injection mold.

[0013] 2. This injection molding device for producing thermally conductive silicone pads is equipped with a demolding component to improve production efficiency and product quality. During demolding, the component works with an air pump to deliver high-pressure airflow into a conical groove. The airflow is evenly dispersed through multiple sets of filter plates with staggered holes. The dispersed airflow acts on the contact surface between the silicone pad and the upper injection mold through the small holes of the conical groove, forming an air cushion separation layer. This significantly reduces demolding resistance, allowing the product to easily detach from the mold. The rubber pad on the pressure plate protects the air pump from damage caused by compression. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model in a non-working state; Figure 2 This is a schematic diagram of the overall structure of this utility model in its working state; Figure 3 This is a cross-sectional view of part of the structure of this utility model; Figure 4 This is a schematic diagram of part of the structure of this utility model; Figure 5 This is a schematic diagram of the injection molding component of this utility model; Figure 6 This is a cross-sectional view of part of the structure of this utility model; Figure 7 This is a schematic cross-sectional view of part of the structure of this utility model.

[0015] Explanation of icon numbers: 1. Base plate; 2. Mounting bracket; 3. Injection molding components; 31. Lower injection mold; 32. Sealing groove; 33. Hydraulic device; 34. Pressing plate; 35. Spring rod; 36. Upper injection mold; 37. Sealing strip; 38. Circular groove; 39. Feed pipe; 310. Connector; 311. Mounting plate; 312. Limiting ring; 313. Limiting rod; 314. Limiting plate; 4. Demolding assembly; 41. Air pump; 42. Rubber pad; 43. Conical groove; 44. Filter plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0018] Please see Figures 1-7 This utility model provides a technical solution: An injection molding device for producing thermally conductive silicone pads includes a base plate 1, on which a mounting bracket 2 is fixedly installed.

[0019] In one embodiment of this utility model, an injection molding assembly 3 is provided on the mounting frame 2. The injection molding assembly 3 includes a lower injection mold 31, which is fixedly mounted on the base plate 1. The lower injection mold 31 has a sealing groove 32. A hydraulic device 33 is fixedly mounted on the mounting frame 2. A pressing plate 34 is fixedly mounted on the piston end of the hydraulic device 33. One end of a spring rod 35 is fixedly mounted on the pressing plate 34. The other end of the spring rod 35 is fixedly mounted on an upper injection mold 36. A sealing strip 37 is fixedly mounted on the upper injection mold 36. A circular groove 38 is provided on the upper injection mold 36. One end of a feed pipe 39 is fixedly mounted on the lower injection mold 31. The other end of the feed pipe 39... A connector 310 is fixedly installed. An installation plate 311 is fixedly installed on the upper injection mold 36. A limit ring 312 is fixedly installed on the mounting bracket 2. One end of a limit rod 313 is fixedly installed on the installation plate 311. A limit plate 314 is fixedly installed on the other end of the limit rod 313. Multiple sets of spring rod 35, installation plate 311, limit ring 312, limit rod 313 and limit plate 314 are provided. The upper injection mold 36 and sealing strip 37 are located above the lower injection mold 31 and sealing groove 32. The sealing strip 37 is located directly above the sealing groove 32. The limit rod 313 slides inside the limit ring 312. The limit plate 314 is located above the limit ring 312.

[0020] In this embodiment, during production, the connector 310 is first connected to the silicone raw material supply equipment. The hydraulic device 33 on the mounting frame 2 is then activated, and its piston pushes the pressing plate 34 downwards. The pressing plate 34, through multiple sets of spring rods 35, drives the upper injection mold 36 to gradually approach the lower injection mold 31 on the base plate 1. When the upper injection mold 36 is about to contact the lower injection mold 31, the spring rods 35 are compressed, providing a buffering force at the moment of mold closing to avoid rigid collisions that could damage the mold. As the upper injection mold 36 continues to descend, the sealing strip at the bottom of the upper injection mold 36... 37 is embedded in the sealing groove 32 of the lower injection mold 31 to form a sealed injection space, preventing leakage when the silicone material is injected later. During this process, the mounting plate 311 on the upper injection mold 36 drives the limiting rod 313 to slide along the limiting ring 312 of the mounting frame 2 to ensure that the upper injection mold 36 descends vertically. When the limiting plate 314 touches the limiting ring 312, it restricts the upper injection mold 36 from continuing to descend, avoiding excessive mold closing and mold damage. At this time, silicone material is injected into the cavity after mold closing through the connector 310 and the feed pipe 39 to complete the injection process.

[0021] In one embodiment of this utility model, a demolding component 4 is provided on the upper injection mold 36. The demolding component 4 includes an air pump 41. The air pump 41 is fixedly installed on the upper injection mold 36. A rubber pad 42 is fixedly installed on the pressing plate 34. A conical groove 43 is opened on the upper injection mold 36. A filter plate 44 is fixedly installed inside the upper injection mold 36. Multiple sets of filter plates 44 are provided. The holes on the multiple sets of filter plates 44 are staggered. The multiple sets of filter plates 44 are located inside the conical groove 43. The rubber pad 42 is located directly above the air pump 41. The air outlet of the air pump 41 is connected to the conical groove 43. The small hole of the conical groove 43 is connected to the inside of the upper injection mold 36.

[0022] In this embodiment, after the silicone raw material is cured and formed in the mold, the hydraulic device 33 drives the pressing plate 34 and the upper injection mold 36 to move upward. At this time, the air pump 41 on the upper injection mold 36 is started. The air pump 41 delivers high-pressure airflow into the conical groove 43. After entering the conical groove 43, the airflow passes through multiple sets of filter plates 44 with staggered holes and is evenly dispersed into multiple stable airflows. The dispersed airflow acts on the contact surface between the silicone pad and the upper injection mold 36 through the small holes of the conical groove 43, forming an air pad separation layer between the two, which greatly reduces the demolding resistance and allows the silicone pad to easily detach from the upper injection mold 36, avoiding product deformation or surface damage that may be caused by traditional demolding methods. The rubber pad 42 on the pressing plate 34 is located directly above the air pump 41. During the mold closing process, it can buffer the pressure of the pressing plate 34 on the air pump 41, protect the air pump 41 from squeezing damage, and extend the service life of the equipment.

[0023] All electrical components appearing in this application are electrically connected to the controller and 220V AC mains power. The controller is a conventional and known device that can control the hydraulic device 33 and the air pump 41. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. In addition, the standard parts are all conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art.

[0024] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install, and complete the circuit debugging work according to the needs of use to ensure that each electrical appliance can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here. The supporting structures of the hydraulic drive structure appearing in this application document, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An injection molding apparatus for producing thermally conductive silicone pads, comprising a base plate (1), wherein a mounting bracket (2) is fixedly mounted on the base plate (1), characterized in that: The mounting bracket (2) is provided with an injection molding assembly (3), the injection molding assembly (3) comprising: The lower injection mold (31) is fixedly installed on the base plate (1). The lower injection mold (31) is provided with a sealing groove (32). The mounting bracket (2) is fixedly installed with a hydraulic device (33). The piston end of the hydraulic device (33) is fixedly installed with a pressing plate (34). One end of a spring rod (35) is fixedly installed on the pressing plate (34). The upper injection mold (36) is fixedly installed on the other end of the spring rod (35), and a sealing strip (37) is fixedly installed on the upper injection mold (36). A circular groove (38) is opened on the upper injection mold (36), and one end of the feed pipe (39) is fixedly installed on the lower injection mold (31). Connector (310), the other end of the feed pipe (39) is fixedly installed with connector (310), the upper injection mold (36) is fixedly installed with mounting plate (311), the mounting bracket (2) is fixedly installed with limit ring (312), one end of limit rod (313) is fixedly installed on the mounting plate (311), and the other end of limit rod (313) is fixedly installed with limit plate (314).

2. The injection molding apparatus for producing thermally conductive silicone pads according to claim 1, characterized in that: The spring rod (35), mounting plate (311), limiting ring (312), limiting rod (313) and limiting plate (314) are provided in multiple sets.

3. The injection molding apparatus for producing thermally conductive silicone pads according to claim 1, characterized in that: The upper injection mold (36) and the sealing strip (37) are disposed above the lower injection mold (31) and the sealing groove (32), and the sealing strip (37) is disposed directly above the sealing groove (32).

4. The injection molding apparatus for producing thermally conductive silicone pads according to claim 1, characterized in that: The limiting rod (313) slides inside the limiting ring (312), and the limiting plate (314) is disposed above the limiting ring (312).

5. The injection molding apparatus for producing thermally conductive silicone pads according to claim 1, characterized in that: The upper injection mold (36) is provided with a demolding component (4), the demolding component (4) includes an air pump (41), the upper injection mold (36) is fixedly installed with an air pump (41), the pressing plate (34) is fixedly installed with a rubber pad (42), the upper injection mold (36) is provided with a conical groove (43), and a filter plate (44) is fixedly installed inside the upper injection mold (36).

6. The injection molding apparatus for producing thermally conductive silicone pads according to claim 5, characterized in that: The filter plate (44) is provided in multiple sets, and the holes on the multiple sets of filter plates (44) are arranged alternately. The multiple sets of filter plates (44) are located inside the conical groove (43).

7. The injection molding apparatus for producing thermally conductive silicone pads according to claim 5, characterized in that: The rubber pad (42) is positioned directly above the air pump (41). The air outlet of the air pump (41) is connected to the conical groove (43), and the small hole of the conical groove (43) is connected to the inside of the injection mold (36).

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