Multi-chambered silicone sleeve vulcanization mold

Abstract

This utility model relates to the field of vulcanization mold technology and discloses a multi-chamber silicone sleeve vulcanization mold, including a lower mold and an upper mold. The lower mold has several molding cavities, and an air cavity is located below the molding cavities. An installation groove is provided on the front side of the lower mold, and a sealing cap is fixedly connected to the installation groove. An installation sleeve is threadedly connected to the lower mold above and below the air cavity. An internal thread groove is provided at the bottom of the installation sleeve. Multiple positioning blocks are fixedly connected to the inner side of the lower mold. A guide groove is provided on the top of the installation sleeve, and a separator plate is inserted into the installation sleeve located below the positioning blocks. Through the air cavity, installation sleeve, and sealing plate, high-pressure gas can act simultaneously on the multiple chambers, pushing the sealing plate to lift the silicone sleeve. This, combined with the high-pressure gas entering the molding cavity, quickly separates the silicone sleeve from the inner wall of the molding cavity, completely solving the problems of low demolding efficiency and incompatibility with multi-chamber molds caused by manual air guns, and significantly improving demolding speed.

Description

Technical Field

[0001] This utility model relates to the field of vulcanization mold technology, and in particular to a multi-chamber silicone sleeve vulcanization mold. Background Technology

[0002] Vulcanizing molds are processing tools used in the processing of elastic materials such as rubber and silicone to achieve the vulcanization and molding of materials. They can not only achieve the final shape of the product through cavity design, but also uniformly transfer heat and pressure in the high temperature and high pressure environment of the vulcanizing machine, assisting the rubber material to complete the cross-linking reaction to obtain key properties such as elasticity and wear resistance. Vulcanizing molds can be classified into compression molding molds and injection molding molds according to their processing methods, and into single-cavity molds and multi-cavity molds according to their structure. They are mostly made of heat-resistant and wear-resistant alloy steel, which can ensure that they do not deform under repeated high temperature and high pressure. When existing compression molding molds heat and press silicone sleeves, due to insufficient surface roughness of some mold cavities, microscopic protrusions are prone to mechanically interlocking with the silicone. In addition, silicone releases a small amount of low-molecular volatiles during heating and vulcanization, which form an adhesive layer after cooling, causing the silicone product to adhere to the cavity. Currently, when demolding freshly pressed silicone products, manual hand-held air guns are often used to blow and assist in demolding. However, this method cannot achieve rapid demolding of silicone products in multi-cavity compression molding molds, and the demolding efficiency is not high. Utility Model Content

[0003] The purpose of this invention is to provide a vulcanizing mold for multi-chamber silicone sleeves, which can simultaneously achieve rapid demolding of multi-chamber silicone sleeves, solve the problem of low demolding efficiency of manual air guns, and effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-chamber silicone sleeve vulcanization mold includes a lower mold and an upper mold. The lower mold has several molding cavities. An air cavity is formed in the lower mold located below the molding cavities. An installation groove is formed on the front side of the lower mold. A sealing cover is fixedly connected to the installation groove. An installation sleeve is threadedly connected to the lower mold located above and below the air cavity. An internal thread groove is formed at the bottom of the installation sleeve. Multiple positioning blocks are fixedly connected to the inner side of the lower mold. A guide groove is formed at the top of the installation sleeve. A partition plate is inserted into the installation sleeve located below the positioning blocks. A sealing plate is inserted into the guide groove. A guide shaft is fixedly connected to the bottom of the sealing plate, and the end of the guide shaft away from the sealing plate is inserted into the partition plate. Fixed shafts are fixedly connected to both sides of the upper mold. Multiple punches are fixedly connected to the bottom of the upper mold.

[0005] As a further preferred embodiment of this utility model, a first sealing groove is provided on the inner side of the mounting groove along the cross-section of the front port of the air cavity.

[0006] As a further preferred embodiment of this utility model, a first sealing ring is fixedly connected to one side of the sealing cover, and a pipe connector is fixedly connected to the center position of the side of the sealing cover opposite to the first sealing ring. The first sealing ring is inserted into the first sealing groove, and the pipe connector is connected to the output end of the air valve of the external air compressor through a pipe. The sealing cover is installed in the mounting groove through the first sealing ring, which can provide an installation base for the connection between the pipe connector and the lower mold. At the same time, the pipe connecting the pipe connector to the external air compressor is made of high temperature resistant material, which can stably input high pressure gas into the air chamber.

[0007] As a further preferred embodiment of this utility model, the inner side of the mounting sleeve is provided with multiple air holes to realize the communication between the inner cavity of the mounting sleeve and the air cavity, so as to realize the synchronous diversion of high pressure gas in the air cavity to multiple mounting sleeves.

[0008] As a further preferred embodiment of this utility model, the inner thread groove is connected to an end piece, the outer side of the sealing plate is provided with a slope corresponding to the guide groove, the bottom of the guide shaft extends through the partition plate to a position below the partition plate and is fixedly connected to a support plate, and a compression spring is fitted on the guide shaft located between the support plate and the partition plate. When the high-pressure gas in the air chamber enters the mounting sleeve through multiple air holes, it pushes the sealing plate upward, thereby causing the silicone sleeve adhering to the molding cavity to be lifted during the upward movement of the sealing plate. At the same time, the high-pressure gas enters the molding cavity through the gap between the sealing plate and the mounting sleeve, causing the silicone sleeve to separate from the inner wall of the molding cavity, thus achieving rapid demolding.

[0009] As a further preferred embodiment of this utility model, a second sealing groove is provided on the top of the lower mold along the outline of the lower mold, and a plurality of positioning grooves are also provided on the top of the lower mold.

[0010] As a further preferred embodiment of this utility model, a second sealing ring is fixedly connected to the bottom of the upper mold, and a plurality of positioning pins are also fixedly connected to the upper mold located inside the second sealing ring. When the lower mold and the upper mold are closed, silicone overflow can be prevented by the mutual insertion of the second sealing groove and the second sealing ring, and the positioning groove and the positioning pins can be used to calibrate and position the punch and the corresponding molding cavity.

[0011] Compared with the prior art, the present invention has the following beneficial effects: In this invention, through the structure of air chamber, mounting sleeve and sealing plate, high pressure gas can act on multiple chambers simultaneously, pushing the sealing plate to lift the silicone sleeve and, together with the high pressure gas entering the molding cavity, quickly separate the silicone sleeve from the inner wall of the molding cavity, completely solving the problems of low demolding efficiency and inability to adapt to multi-cavity molds by manual air gun, and greatly improving the demolding speed. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of the lower mold of this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the mounting sleeve structure of this utility model; Figure 5 for Figure 2 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the sealing cap structure of this utility model; Figure 7 This is a schematic diagram of the upper mold structure of this utility model.

[0013] In the diagram: 1. Lower mold; 2. Upper mold; 3. Molding cavity; 4. Air cavity; 5. Mounting groove; 6. Sealing cap; 7. Mounting sleeve; 8. Internal thread groove; 9. Positioning block; 10. Guide groove; 11. Separator; 12. Sealing plate; 13. Guide shaft; 14. Fixed shaft; 15. Punch; 16. First sealing groove; 17. First sealing ring; 18. Pipe joint; 19. Air hole; 20. End piece; 21. Support piece; 22. Compression spring; 23. Second sealing groove; 24. Positioning groove; 25. Second sealing ring; 26. Positioning pin. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] like Figures 1-7 As shown, the present invention provides a multi-chamber silicone sleeve vulcanization mold, including a lower mold 1 and an upper mold 2. The lower mold 1 has several molding cavities 3. An air cavity 4 is opened in the lower mold 1 located below the molding cavity 3. An installation groove 5 is opened on the front side of the lower mold 1. A sealing cover 6 is fixedly connected in the installation groove 5. An installation sleeve 7 is threadedly connected to the lower mold 1 located above and below the air cavity 4. An internal thread groove 8 is opened at the bottom of the installation sleeve 7. A plurality of positioning blocks 9 are fixedly connected to the inner side of the lower mold 1. A guide groove 10 is opened at the top of the installation sleeve 7. A partition plate 11 is inserted and connected in the installation sleeve 7 located below the positioning block 9. A sealing plate 12 is inserted and connected in the guide groove 10. A guide shaft 13 is fixedly connected to the bottom of the sealing plate 12, and the end of the guide shaft 13 away from the sealing plate 12 is inserted and connected in the partition plate 11. Fixed shafts 14 are fixedly connected to both sides of the upper mold 2. A plurality of punches 15 are fixedly connected to the bottom of the upper mold 2.

[0016] A first sealing groove 16 is formed on the inner side of the mounting groove 5 along the front port section of the air chamber 4. A first sealing ring 17 is fixedly connected to one side of the sealing cover 6. A pipe connector 18 is fixedly connected to the center position of the side of the sealing cover 6 opposite to the first sealing ring 17. The first sealing ring 17 is inserted into the first sealing groove 16. The pipe connector 18 is connected to the output end of the air valve of the external air compressor through a pipe. Installing the sealing cover 6 in the mounting groove 5 through the first sealing ring 17 provides an installation base for the connection between the pipe connector 18 and the lower mold 1. At the same time, the pipe connecting the pipe connector 18 to the external air compressor is made of high temperature resistant material, which can stably input high-pressure gas into the air chamber 4. Multiple air holes 19 are formed on the inner side of the mounting sleeve 7 to realize the communication between the inner cavity of the mounting sleeve 7 and the air chamber 4, so as to realize the synchronous diversion of high-pressure gas in the air chamber 4 to multiple... Inside the mounting sleeve 7, the inner threaded groove 8 is connected to the end piece 20. The outer side of the sealing plate 12 has a slope corresponding to the guide groove 10. The bottom of the guide shaft 13 passes through the partition plate 11 and extends to the position below the partition plate 11 and is fixedly connected to the support plate 21. The guide shaft 13 located between the support plate 21 and the partition plate 11 is fitted with a compression spring 22. When the high pressure gas in the air chamber 4 enters the mounting sleeve 7 through multiple air holes 19, it pushes the sealing plate 12 upward, thereby causing the silicone sleeve adhering to the molding cavity 3 to be lifted during the upward movement of the sealing plate 12. At the same time, the high pressure gas enters the molding cavity 3 through the gap between the sealing plate 12 and the mounting sleeve 7, causing the silicone sleeve to separate from the inner wall of the molding cavity 3, realizing rapid demolding. The top of the lower mold 1 has a second sealing groove 23 along the outline of the lower mold 1. The top of the lower mold 1 also has multiple positioning grooves 24.

[0017] like Figure 7 As shown, the bottom of the upper mold 2 is fixedly connected to a second sealing ring 25. The upper mold 2 located inside the second sealing ring 25 is also fixedly connected to a plurality of positioning pins 26. When the lower mold 1 and the upper mold 2 are closed, the silicone can be prevented from overflowing by interlocking the second sealing groove 23 and the second sealing ring 25, and the positioning groove 24 and the positioning pins 26 can be used to calibrate and position the punch 15 and the corresponding molding cavity 3.

[0018] It should be noted that this utility model is a multi-chamber silicone sleeve vulcanization mold. In use, the silicone raw material to be vulcanized is first filled into the molding cavity 3 of the lower mold 1. Then, the upper mold 2 is driven to move downward with the existing mold frame, so that the positioning pin 26 at the bottom of the upper mold 2 is inserted into the positioning groove 24 at the top of the lower mold 1, and the punch 15 and the molding cavity 3 are accurately aligned. At the same time, the second sealing ring 25 at the bottom of the upper mold 2 is embedded in the second sealing groove 23 at the top of the lower mold 1 to achieve mold closing and sealing, and prevent silicone from overflowing during vulcanization. After the mold is closed, the combination of the lower mold 1 and the upper mold 2 is pushed into the vulcanizing machine to provide a high temperature and high pressure environment. The heat and pressure are evenly transferred to the silicone raw material in the molding cavity 3 through the lower mold 1 and the upper mold 2, which helps the silicone to complete the cross-linking reaction and gradually form a silicone sleeve semi-finished product with elasticity. Then, the mold frame pushes the lower mold 1 and the upper mold 2 out of the vulcanizing machine and lifts the upper mold 2. Subsequently, the external air compressor is started, and high-pressure gas is delivered through the pipeline to the pipeline joint 18 of the sealing cover 6, and then enters the air chamber 4 of the lower mold 1 through the sealing cover 6. Thus, the high-pressure gas in the air chamber 4 is simultaneously distributed to the interior of each mounting sleeve 7 through multiple air holes 19 on the inner side of the mounting sleeve 7. The high-pressure gas acts on the sealing plate 12 inside the mounting sleeve 7, pushing the sealing plate 12 to move upward along the guide groove 10 at the top of the mounting sleeve 7. During the upward movement of the sealing plate 12, it directly pushes up the molding cavity 3. The silicone sleeve semi-finished product is formed. At the same time, some high-pressure gas enters the molding cavity 3 through the gap between the sealing sheet 12 and the mounting sleeve 7, forming an air film between the silicone sleeve and the inner wall of the molding cavity 3, weakening the adhesion between the two, and further assisting the silicone sleeve to detach from the molding cavity 3. After demolding, the external air compression equipment is turned off, the air pressure in the air cavity 4 and the mounting sleeve 7 decreases, the compression spring 22 in the mounting sleeve 7 releases its elasticity, pushing the support piece 21 to move downward. The support piece 21 drives the guide shaft 13 to move downward, thereby pulling the sealing sheet 12 back to the initial position of the guide groove 10, preparing for the next vulcanization molding.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-chamber silicone sleeve vulcanization mold, characterized in that: The device includes a lower mold (1) and an upper mold (2). The lower mold (1) has several forming cavities (3). An air cavity (4) is formed in the lower mold (1) located below the forming cavities (3). An installation groove (5) is formed on the front side of the lower mold (1). A sealing cover (6) is fixedly connected in the installation groove (5). An installation sleeve (7) is threadedly connected to the lower mold (1) located above and below the air cavity (4). An internal thread groove (8) is formed at the bottom of the installation sleeve (7). Multiple positioning blocks (9) are fixedly connected to the inner side of the lower mold (1). The top of the mounting sleeve (7) is provided with a guide groove (10). A partition plate (11) is inserted into the mounting sleeve (7) located below the positioning block (9). A sealing plate (12) is inserted into the guide groove (10). A guide shaft (13) is fixedly connected to the bottom of the sealing plate (12). The end of the guide shaft (13) away from the sealing plate (12) is inserted into the partition plate (11). Fixed shafts (14) are fixedly connected to both sides of the upper mold (2). Multiple punches (15) are fixedly connected to the bottom of the upper mold (2).

2. The multi-chamber silicone sleeve vulcanizing mold according to claim 1, characterized in that: The mounting groove (5) has a first sealing groove (16) on the inner side along the front port section of the air cavity (4).

3. The multi-chamber silicone sleeve vulcanizing mold according to claim 2, characterized in that: A first sealing ring (17) is fixedly connected to one side of the sealing cover (6), and a pipe connector (18) is fixedly connected to the center of the side of the sealing cover (6) opposite to the first sealing ring (17). The first sealing ring (17) is inserted into the first sealing groove (16), and the pipe connector (18) is connected to the air valve output end of the external air compressor through the pipe.

4. The multi-chamber silicone sleeve vulcanizing mold according to claim 1, characterized in that: The mounting sleeve (7) has multiple air holes (19) on its inner side.

5. The multi-chamber silicone sleeve vulcanizing mold according to claim 4, characterized in that: The inner thread groove (8) is connected to the end piece (20). The outer side of the sealing piece (12) is provided with a slope corresponding to the guide groove (10). The bottom of the guide shaft (13) passes through the partition piece (11) and extends to the position below the partition piece (11) and is fixedly connected to the support piece (21). The guide shaft (13) located between the support piece (21) and the partition piece (11) is fitted with a compression spring (22).

6. The multi-chamber silicone sleeve vulcanizing mold according to claim 1, characterized in that: The lower mold (1) has a second sealing groove (23) along its outline at the top, and the lower mold (1) also has multiple positioning grooves (24) at the top.

7. A multi-chamber silicone sleeve vulcanizing mold according to claim 6, characterized in that: The bottom of the upper mold (2) is fixedly connected to a second sealing ring (25), and the upper mold (2) located inside the second sealing ring (25) is also fixedly connected to a plurality of positioning pins (26).

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