A precision injection molding device for silicone rubber parts

Abstract

The utility model relates to injection molding equipment technical field discloses a kind of precision injection molding device of silicone rubber parts, including injection molding platform and hydraulic cylinder, the top of injection molding platform is provided with hydraulic cylinder by support, the piston rod of hydraulic cylinder is fixedly connected with connecting plate, the bottom of connecting plate is fixedly connected with upper die, the lower die is arranged in the directly below of upper die, and buffer is arranged in the upper die;Slide rail, fixed in the top of injection molding platform, the top of slide rail is slidably connected with connecting seat, and the bottom of lower die is fixedly connected with the top of connecting seat;The utility model can make lower die automatic reset and deviate the directly below of upper die by first spring after completing injection molding, facilitate operator to take part and maintain cleaning to lower die, avoid hand in the directly below of upper die when personnel operation, improve security.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to a precision injection molding device for silicone rubber parts. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are usually made using rubber injection molding and plastic injection molding. Rubber injection molding is a production method in which rubber material is directly injected from the barrel into a mold for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the blank preparation process is eliminated, the labor intensity is low, and the product quality is excellent. In the production of notebook computer parts, injection molding technology is widely used in the production of silicone rubber parts.

[0003] In traditional injection molding machines, when operators are handling the molded parts or cleaning the lower mold, their hands are positioned below the upper mold, posing a safety hazard that needs to be addressed. Utility Model Content

[0004] The purpose of this invention is to provide a precision injection molding device for silicone rubber parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision injection molding device for silicone rubber parts, comprising an injection table and a hydraulic cylinder. The top of the injection table is provided with a hydraulic cylinder via a bracket. The piston rod of the hydraulic cylinder is fixedly connected to a connecting plate. The bottom of the connecting plate is fixedly connected to an upper mold. A lower mold is provided directly below the upper mold. A buffer is provided inside the lower mold.

[0006] A slide rail is fixed to the top of the injection molding table. A connecting seat is slidably connected to the top of the slide rail. The top of the connecting seat is fixedly connected to the bottom of the lower mold. Connecting rods are fixedly connected to both sides of the connecting seat by bolts. A V-shaped bracket is provided at one end of the connecting rod. A first spring is fixedly connected to one side of the lower mold.

[0007] Preferably, a guide rod is slidably connected to the inner wall of the connecting plate, and the bottom end of the guide rod is fixedly connected to the top of the injection molding table.

[0008] Preferably, an L-shaped rod is fixedly connected to the bottom of the connecting plate, and a guide groove is provided at the bottom of the L-shaped rod.

[0009] Preferably, a first roller is rotatably connected to one side of the connecting rod, and a limiting groove is provided on the inner wall of the V-shaped frame to cooperate with the first roller.

[0010] Preferably, a second roller that cooperates with the guide groove is rotatably connected to one side of the V-shaped frame, and a fixed seat is rotatably connected to the outer side of the V-shaped frame.

[0011] Preferably, the buffer includes a fixed plate disposed on the inner wall of the lower mold, the inner wall of the lower mold is provided with a buffer groove, a positioning pin is slidably connected to the inner wall of the buffer groove, a second spring is disposed on the outer side of the positioning pin, the top of the positioning pin is fixedly connected to the bottom of the fixed plate, one end of the second spring is fixedly connected to the bottom of the inner cavity of the lower mold, and the other end of the second spring is fixedly connected to the bottom of the fixed plate.

[0012] Preferably, one end of the first spring is fixedly connected to a limiting plate, and the bottom of the limiting plate is fixedly connected to the top of the injection molding table.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention uses a hydraulic cylinder to move the connecting plate and L-shaped rod downwards. At this time, the second roller is under pressure and moves along the guide groove, causing the V-shaped frame to rotate. Then, the first roller moves within the limiting groove, causing the connecting rod to move the lower mold synchronously, allowing the upper and lower molds to close. Liquid material in the lower mold is then injected. A buffer is used to cushion the downward pressure from the upper mold. During this process, the first spring is stretched. After injection, the hydraulic cylinder rises, the buffer automatically demolds the parts in the lower mold, and the first spring automatically resets the lower mold. This facilitates the operator's handling of parts and also makes maintenance and cleaning of the lower mold easier. It also prevents personnel from having their hands directly below the upper mold, improving safety. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the precision injection molding apparatus for silicone rubber parts provided by this utility model;

[0016] Figure 2 A schematic diagram of the V-shaped frame and the second roller structure provided by this utility model;

[0017] Figure 3 This is a partial cross-sectional structural schematic diagram provided for this utility model;

[0018] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0019] In the diagram: 1. Injection molding platform; 2. Hydraulic cylinder; 3. Connecting plate; 4. Upper mold; 5. Lower mold; 6. Buffer component; 61. Fixing plate; 62. Buffer groove; 63. Positioning pin; 64. Second spring; 7. Slide rail; 8. Connecting seat; 9. Connecting rod; 10. V-shaped frame; 11. Guide rod; 12. L-shaped rod; 13. Guide groove; 14. First roller; 15. Limiting groove; 16. Second roller; 17. Fixing seat; 18. First spring; 19. Limiting plate. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 As shown, a precision injection molding device for silicone rubber parts includes an injection table 1 and a hydraulic cylinder 2. The hydraulic cylinder 2 is mounted on the top of the injection table 1 via a bracket. The piston rod of the hydraulic cylinder 2 is fixedly connected to a connecting plate 3. An upper mold 4 is fixedly connected to the bottom of the connecting plate 3. A lower mold 5 is located directly below the upper mold 4. A buffer 6 is installed inside the lower mold 5. The hydraulic cylinder 2 drives the connecting plate 3 to move downward, thereby closing the upper mold 4 and the lower mold 5 and injecting the liquid raw material inside the lower mold 5. The buffer 6 is used to buffer the downward pressure of the upper mold 4, preventing excessive downward pressure from damaging the lower mold 5 and causing deformation due to excessive stamping of the parts. When the hydraulic cylinder 2 rises, the buffer 6 can automatically demold the parts inside the lower mold 5, making it easy for workers to handle.

[0022] The slide rail 7 is fixed to the top of the injection molding table 1. The top of the slide rail 7 is slidably connected to the connecting seat 8. The top of the connecting seat 8 is fixedly connected to the bottom of the lower mold 5. Both sides of the connecting seat 8 are fixedly connected to the connecting rod 9 by bolts. One end of the connecting rod 9 is provided with a V-shaped frame 10. A first spring 18 is fixedly connected to one side of the lower mold 5. When the connecting plate 3 moves down, it drives the V-shaped frame 10 to rotate. When the V-shaped frame 10 rotates, it drives the connecting rod 9 to move, thereby causing the lower mold 5 to drive the connecting seat 8 and move it to the position directly below the upper mold 4 through the slide rail 7, thereby achieving the purpose of injection molding. During this process, the first spring 18 is in a stretched state. After the injection molding is completed, the hydraulic cylinder 2 rises, and the lower mold 5 is automatically reset through the first spring 18.

[0023] A guide rod 11 is slidably connected to the inner wall of the connecting plate 3, and the bottom end of the guide rod 11 is fixedly connected to the top of the injection molding table 1; the guide rod 11 is used to limit the connecting plate 3 so that it remains stable when it moves.

[0024] An L-shaped rod 12 is fixedly connected to the bottom of the connecting plate 3. A guide groove 13 is provided at the bottom of the L-shaped rod 12. A first roller 14 is rotatably connected to one side of the connecting rod 9. A limiting groove 15 that cooperates with the first roller 14 is provided on the inner wall of the V-shaped frame 10. A second roller 16 that cooperates with the guide groove 13 is rotatably connected to one side of the V-shaped frame 10. A fixed seat 17 is rotatably connected to the outer side of the V-shaped frame 10. The bottom of the fixed seat 17 is fixedly connected to the top of the injection molding table 1. The connecting plate 3 drives the L-shaped rod 12 to move down, thereby pressing down the second roller 16. The second roller 16 moves along the guide groove 13 under pressure and causes the V-shaped frame 10 to rotate through the fixed seat 17, thereby causing the first roller 14 to move in the limiting groove 15. This causes the connecting rod 9 to drive the lower mold 5 to move synchronously. When the injection molding is completed, the lower mold 5 automatically resets and is located on one side below the upper mold 4, which is convenient for operators to pick up parts and also facilitates the maintenance and cleaning of the lower mold 5. It also avoids the personnel's hands being directly below the upper mold 4, thus improving safety.

[0025] The buffer component 6 includes a fixed plate 61 disposed on the inner wall of the lower mold 5. The inner wall of the lower mold 5 has a buffer groove 62. A positioning pin 63 is slidably connected to the inner wall of the buffer groove 62. A second spring 64 is disposed on the outer side of the positioning pin 63. The top of the positioning pin 63 is fixedly connected to the bottom of the fixed plate 61. One end of the second spring 64 is fixedly connected to the bottom of the inner cavity of the lower mold 5, and the other end of the second spring 64 is fixedly connected to the bottom of the fixed plate 61. When the upper mold 4 and the lower mold 5 are closed, the fixed plate 61 will move down under the action of pressure, thereby causing the positioning pin 63 to move into the buffer groove 62 and be buffered by the second spring 64. When the upper injection is completed, the hydraulic cylinder 2 rises, and the second spring 64 drives the fixed plate 61 to automatically reset, so that the part can be automatically demolded.

[0026] One end of the first spring 18 is fixedly connected to a limiting plate 19, and the bottom of the limiting plate 19 is fixedly connected to the top of the injection molding table 1; the limiting plate 19 facilitates the limiting of the first spring 18.

[0027] Working principle: The hydraulic cylinder 2 is activated, causing the connecting plate 3 to move the L-shaped rod 12 downward. The second roller 16, under the pressure of the L-shaped rod 12, moves along the guide groove 13 and rotates the V-shaped frame 10. Then, the first roller 14 moves along the limiting groove 15 and causes the connecting rod 9 to move the lower mold 5 synchronously, so that the upper mold 4 and the lower mold 5 are closed. The liquid material in the lower mold 5 is injected. The buffer 6 is used to buffer the downward pressure of the upper mold 4. During this process, the first spring 18 is in a stretched state. After the injection is completed, the hydraulic cylinder 2 rises, the buffer 6 causes the parts in the lower mold 5 to be automatically demolded, and the first spring 18 causes the lower mold 5 to automatically reset, making it convenient for operators to pick up the parts. It also facilitates the maintenance and cleaning of the lower mold 5 and avoids the personnel's hands being directly below the upper mold 4, thus improving safety.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision injection molding apparatus for silicone rubber parts, comprising an injection molding table (1), characterized in that, Also includes: A hydraulic cylinder (2) is mounted on the top of the injection molding table (1) via a bracket. The piston rod of the hydraulic cylinder (2) is fixedly connected to a connecting plate (3). An upper mold (4) is fixedly connected to the bottom of the connecting plate (3). A lower mold (5) is located directly below the upper mold (4). A buffer (6) is located inside the lower mold (5). The slide rail (7) is fixed to the top of the injection table (1). The top of the slide rail (7) is slidably connected to the connecting seat (8). The top of the connecting seat (8) is fixedly connected to the bottom of the lower mold (5). Both sides of the connecting seat (8) are fixedly connected to the connecting rod (9) by bolts. One end of the connecting rod (9) is provided with a V-shaped frame (10). A first spring (18) is fixedly connected to one side of the lower mold (5).

2. The precision injection molding device for silicone rubber parts according to claim 1, characterized in that: The inner wall of the connecting plate (3) is slidably connected to a guide rod (11), and the bottom end of the guide rod (11) is fixedly connected to the top of the injection molding table (1).

3. The precision injection molding device for silicone rubber parts according to claim 2, characterized in that: An L-shaped rod (12) is fixedly connected to the bottom of the connecting plate (3), and a guide groove (13) is provided at the bottom of the L-shaped rod (12).

4. The precision injection molding device for silicone rubber parts according to claim 1, characterized in that: The first roller (14) is rotatably connected to one side of the connecting rod (9), and the inner wall of the V-shaped frame (10) is provided with a limiting groove (15) that cooperates with the first roller (14).

5. The precision injection molding device for silicone rubber parts according to claim 3, characterized in that: A second roller (16) that works with the guide groove (13) is rotatably connected to one side of the V-shaped frame (10), and a fixed seat (17) is rotatably connected to the outer side of the V-shaped frame (10).

6. The precision injection molding device for silicone rubber parts according to claim 1, characterized in that: The buffer component (6) includes a fixed plate (61) disposed on the inner wall of the lower mold (5). The inner wall of the lower mold (5) is provided with a buffer groove (62). A positioning pin (63) is slidably connected to the inner wall of the buffer groove (62). A second spring (64) is disposed on the outer side of the positioning pin (63). The top of the positioning pin (63) is fixedly connected to the bottom of the fixed plate (61). One end of the second spring (64) is fixedly connected to the bottom of the inner cavity of the lower mold (5). The other end of the second spring (64) is fixedly connected to the bottom of the fixed plate (61).

7. The precision injection molding device for silicone rubber parts according to claim 1, characterized in that: One end of the first spring (18) is fixedly connected to a limiting plate (19), and the bottom of the limiting plate (19) is fixedly connected to the top of the injection molding table (1).

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