Die for vulcanizing double-sided framework silica gel shock pad

Abstract

The invention relates to the field of double-sided framework silica gel shock pad production equipment, and discloses a mold for vulcanizing a double-sided framework silica gel shock pad, which comprises an upper mold and a lower mold, the upper mold and the lower mold are respectively provided with a plurality of corresponding upper cavities and lower cavities, and the upper cavities and the lower cavities form sealed vulcanized cavities when closed; the magnetic adsorption assembly is arranged in the top area of the upper mold, the magnetic adsorption assembly comprises a magnet, the magnet and the upper cavity are arranged in a staggered mode in the vertical direction, and the magnet is isolated from the upper cavity; according to the mold, through the innovative design of the magnetic adsorption assembly, the top area of the upper mold is provided with the magnet which is vertically staggered with the upper cavity and is completely isolated from the upper cavity, and the upper framework of the silica gel shock pad is indirectly adsorbed through magnetic force; the problems that in a traditional magnet fixing mode, falling, fragmentation and glue failure exist, and appearance defects exist in the double-face framework shock pad after injection molding are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vulcanization molds for double-sided skeleton silicone damping pads, and more specifically, to a mold for vulcanizing double-sided skeleton silicone damping pads. Background Art

[0002] In the field of rubber product vulcanization and molding, due to the special damping performance requirements of silicone damping pads with a double-sided skeleton structure, significant technical challenges are faced in mold positioning and molding processes. In the prior art, using a magnetic positioning device to solve the skeleton positioning problem has become a common means in the industry.

[0003] For example, Chinese Utility Model Patent CN203004137U discloses a mold with a magnet embedded in the upper template for adsorbing and positioning the skeleton, including an upper template, a lower template, and a skeleton, and further including a first magnet and a second magnet. Two through holes are provided on the rectangular upper template, and the first magnet and the second magnet are respectively installed in the through holes. The first magnet and the second magnet are symmetrically distributed about the center of the upper template; a circular cavity is provided on the lower surface of the upper template, and a skeleton is provided in the cavity. The first magnet and the second magnet are used to adsorb and position the skeleton, making it convenient, fast, accurate in positioning, and high in efficiency for the upper template to fill the skeleton, greatly improving the operation efficiency and the product qualification rate.

[0004] According to the attachment of the above solution Figure 1 it can be seen that holes are opened on the top surface of the cavity and magnets are installed. Because the magnets have magnetic force, this method will take out the magnets when removing the product after injection molding. If the magnets have an interference fit with the assembly holes in the cavity, the magnets will break when being placed (magnetic brittleness). If glued in the holes, the glue will fail under high-temperature conditions. In addition, if the magnets are installed in the assembly holes with a clearance fit, glue will run into the assembly holes during injection molding, resulting in unqualified appearance. Summary of the Invention

[0005] The present invention aims to overcome at least one defect of the above prior art, and provides a mold for vulcanizing double-sided skeleton silicone damping pads, which is used to solve the technical problems of unreliable magnet installation in injection molds and appearance defects in double-sided skeleton damping pads after injection molding.

[0006] The technical solution adopted by the present invention is a mold for vulcanizing a double-sided skeleton silicone shock pad, comprising: an upper mold and a lower mold. The upper mold and the lower mold are respectively provided with a plurality of corresponding upper cavities and lower cavities. When closed, the upper cavity and the lower cavity form a cavity for sealed vulcanization; a magnetic adsorption assembly is arranged in the top area of the upper mold. The magnetic adsorption assembly includes a magnet, and the magnet is arranged in a vertical offset with respect to the upper cavity and is isolated from the upper cavity. Among them, the magnet is used to adsorb the upper skeleton of the silicone shock pad to fix the position of the upper skeleton during the vulcanization process; a reserved hole is arranged on the top surface of the upper cavity, and a boss is formed on the boss surface of the upper skeleton; the outer diameter of the boss is less than the aperture of the reserved hole by millimeters, and the height of the boss is less than the depth of the reserved hole.

[0007] Through the clearance fit between the boss and the reserved hole and the reserved space of the height difference, an avoidance structure is formed to ensure the accurate positioning of the upper skeleton in the mold and avoid uneven sealing glue or overflow of glue caused by the offset of the skeleton during vulcanization; at the same time, an appropriate clearance not only ensures that the silicone material fully fills the interface between the skeleton and the mold during the vulcanization process, improves the sealing tightness of the sealing glue, but also prevents the boss from being too deep to cause mold interference and the glue from flowing to the boss surface of the upper skeleton during injection molding through height limitation, ensuring qualified appearance and improving the yield of vulcanization molding; through the innovative design of the magnetic adsorption assembly, a magnet that is vertically offset and completely isolated from the upper cavity is arranged in the top area of the upper mold, and the upper skeleton of the silicone shock pad is indirectly adsorbed by magnetic force, effectively solving the problems of falling off, fragmentation, glue failure in the traditional magnet fixing method and appearance defects in the double-sided skeleton shock pad after injection molding. The magnet is completely physically isolated from the cavity, preventing overflow of glue, flash or stains caused by the infiltration of molten silicone, ensuring that the surface of the product after vulcanization is smooth and flat, and effectively reducing the scrap rate.

[0008] Further, when the vertical distance between the bottom surface of the magnet and the top surface of the upper cavity is 0.5 mm, the lateral offset distance between the side of the magnet and the side edge of the upper cavity is not greater than 3 mm. This magnet positioning structure ensures the adsorption force of the magnet on the upper skeleton during vulcanization and maintains a safe distance from the mold by controlling the vertical distance (0.5 mm) between the magnet and the upper cavity and the lateral offset distance (not greater than 3 mm), ensuring that the mold has high structural strength.

[0009] Furthermore, the upper mold and the lower mold are respectively installed with an upper core and a lower core in a detachable manner. The upper cavity is formed on the upper core, and the lower cavity is formed on the lower core. An embedding hole matching the shape of the magnet is provided in the top area of the upper core. The magnet is fixed to the top of the upper core through the embedding hole, and the embedding hole and the upper cavity are isolated by the body structure of the upper core. This design realizes the flexible replacement of the mold cavity through the detachable upper core and lower core, facilitating maintenance and adapting to different product specifications. The magnet is fixed through the embedding hole and isolated from the upper cavity, which not only ensures the accurate adsorption and positioning of the skeleton but also facilitates the adjustment of the skeleton position when the adsorption force is too strong and the skeleton cannot be placed in place.

[0010] Furthermore, when the upper cavity and the lower cavity are closed, a gap is formed between their mating surfaces. The width of the gap is 0.05 mm to form a flash layer during the injection molding process. The reasonable gap ensures a flash structure suitable for trimming. The silicone used for such shock pads has good elasticity, and the Shore hardness of the rubber is 30-35 degrees. If it is thicker, it is difficult to tear, and granular residues are likely to appear after tearing. The flash formed at this size is very convenient to tear off manually, and it can be torn off easily without residue.

[0011] Furthermore, the vulcanization pressure of the vulcanization mold during vulcanization is 5 MPa. The vulcanization pressure of the vulcanization mold is 5 MPa. By reducing the pressure value to 5 MPa, the sealing effect of the skeleton on the rubber material is enhanced and the overflow defect is reduced.

[0012] Furthermore, the heat-resistant temperature of the magnet is not lower than 300 °C. To ensure the magnetic stability in the high-temperature working environment of the vulcanization mold and prevent magnetic attenuation or structural failure caused by too high temperature.

[0013] Furthermore, the same side of the upper mold and the lower mold is connected by a hinge structure. After the upper mold is pried open by means of a lever and flipped to one side, both the upper cavity and the lower cavity can face the operator, making it easy to take products and place skeletons. With this structure, the labor intensity is low, and both male and female operators can be competent, without the need to specifically select male employees to do the job.

[0014] Furthermore, a glue injection system is provided inside the upper mold. The glue injection system includes a glue injection cylinder disposed in the top area of the upper mold for storing or conveying raw materials; a top block slidably disposed inside the glue injection cylinder for extruding the raw materials to flow into the cavity through the flow channel inside the upper mold; and a spring disposed between the top block and the inner wall of the glue injection cylinder for providing an elastic force to push the glue injection cylinder open after the vulcanizer is removed. The movement of the top block extrudes the raw materials into the flow channel for glue injection by overcoming the elastic force of the spring with an external force. Only one glue injection cylinder is processed, and the rubber used for all cavities is provided by this glue injection cylinder. A single piece of rubber can be used for preforming, improving the efficiency. The production of similar products can be achieved using an ordinary vulcanizer on the market, saving the funds for specialized research and development of such equipment.

[0015] Furthermore, an ejection mechanism is provided inside the lower mold, including a top plate and ejector pins. The top plate drives the ejector pins to move in a preset direction to eject the vulcanized and formed double-sided skeleton silicone shock pad. The ejection mechanism of this solution drives the ejector pins to accurately eject the vulcanized and formed double-sided skeleton silicone shock pad in a preset direction by the top plate, effectively solving the problems of product deformation, sealant surface damage, or sticking to the mold easily occurring in traditional demolding. Its automated design significantly improves the demolding efficiency, reduces manual intervention, and at the same time avoids the separation of the rubber body from the skeleton caused by improper ejection force or direction, ensuring the structural integrity of the product.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the innovative design of the magnetic adsorption component, magnets are disposed in the top area of the upper mold, vertically misaligned and completely isolated from the upper cavity, and the upper skeleton of the silicone shock pad is indirectly adsorbed by magnetic force, effectively solving the problems of detachment, fragmentation, glue failure in the traditional magnet fixing method, and appearance defects in the double-sided skeleton shock pad after injection molding. The magnets are completely physically isolated from the cavity, preventing overflow glue, flash, or stains caused by the infiltration of molten silicone, ensuring that the surface of the product is smooth and flat after vulcanization, and effectively reducing the rejection rate.

[0017] The flexible replacement of the mold cavity is realized through the detachable upper core and lower core, which is convenient for maintenance and adaptation to different product specifications; through the clearance fit between the boss and the reserved hole (the outer diameter difference is 0.4 - 0.6 mm, and the height difference has a reserved space), an avoidance structure is formed to ensure the accurate positioning of the upper skeleton in the mold, and to avoid appearance defects caused by uneven sealant or overflow glue due to the offset of the skeleton during vulcanization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the double-sided skeleton silicone shock pad of the present invention.

[0019] Figure 2 It is a schematic overall structural diagram of the present invention.

[0020] Figure 3This is a partial structural diagram of the upper mold and the lower mold of the present invention.

[0021] Figure 4 For the present invention Figure 3 An enlarged view of the partial structure at position A in the present invention.

[0022] Figure 5 This is a front view schematic diagram of the upper mold of the present invention.

[0023] In the figure: 1. Double-sided skeleton silicone shock-absorbing pad; 2. Upper skeleton; 21. Convex table surface; 211. Convex platform; 22. Curved surface; 3. Lower skeleton; 4. Rubber body; 5. Upper mold; 51. Upper cavity; 511. Reserved hole; 52. Upper core; 53. Embedded hole; 6. Lower mold; 61. Lower cavity; 62. Lower core; 7. Hinge structure; 8. Magnet; 9. Connecting flow channel; 10. Top plate; 11. Glue injection cylinder; 12. Spring; 13. Top block; 14. Flow channel; 15. Ejector pin. Detailed implementation manners

[0024] The attached drawings of the present invention are only for illustrative purposes and should not be construed as a limitation to the present invention. To better illustrate the following embodiments, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0025] As Figure 1 shown, the double-sided skeleton silicone shock-absorbing pad 1 includes a rubber body 4 and a skeleton. The skeleton includes an upper skeleton 2 and a lower skeleton 3. The upper skeleton 2 and the lower skeleton 3 are respectively attached to the top end and the bottom end of the rubber body 4. The upper skeleton 2 and the lower skeleton 3 are respectively vulcanized and bonded to the rubber body 4. The rubber body 4 is made of silicone rubber, and the Shore hardness of the rubber is 30-35 degrees.

[0026] The technical problem to be solved by the present invention is how to vulcanize the silicone shock-absorbing pad with skeletons on both the upper and lower surfaces in batches. The present invention provides a vulcanization mold structure for such similar products.

[0027] The current manufacturing difficulties of this product: 1. There are skeletons on both the upper and lower surfaces, so it is impossible to position in the mold, and the upper skeleton is easy to fall into the cavity. 2. In order to have better shock-absorbing effect, this kind of shock-absorbing pad uses low-hardness silicone rubber with good shock-absorbing performance and excellent elasticity (the Shore hardness of the rubber is 30-35 degrees). The characteristic of this kind of silicone rubber is high viscosity and difficult to preform. One of the difficulties solved by this set of molds is how to improve the preforming efficiency. Silicone rubber is a semi-fluid state with strong viscosity and is not easy to preform with machinery. The efficiency of one product with one rubber blank is very low. 3. The fluidity of silicone rubber is very good, and it is easy to overflow and cross the rubber to the skeleton surface, resulting in unqualified product appearance. 4. There is no dedicated vulcanizer for this kind of structure, or the equipment price is high, and the input-output ratio is not cost-effective.

[0028] 5. The rubber fluidity of the silicone shock pad is very good. There will be a situation where the cavity closer to the injection hole is filled with rubber, while the cavity farther away has not been filled with rubber yet. By the time the cavity farther away is filled with rubber, the rubber in the closer cavity has already started to overflow.

[0029] As Figure 2 shown, the present invention discloses a mold specifically for vulcanizing a silicone shock pad with a double-sided skeleton structure, including an upper mold 5 and a lower mold 6. The injection system is integrated inside the upper mold 5, and a plurality of upper cavities 51 are provided; correspondingly, the same number of lower cavities 61 are configured inside the lower mold 6. The upper cavities 51 and the lower cavities 61 form the cavity for vulcanizing the double-sided skeleton silicone shock pad 1; when the upper mold 5 and the lower mold 6 are accurately aligned and closed, each upper cavity 51 will be perfectly docked with its corresponding lower cavity 61 to form a sealed cavity to accommodate and vulcanize the silicone shock pad with the upper skeleton 2 and the lower skeleton 3.

[0030] As Figure 1 、 2 and Figure 3 show: In order to prevent the upper skeleton 2 from falling off when installed in the upper cavity 51, several magnets 8 are provided inside the upper mold 5 for adsorbing the upper skeleton 2. One magnet 8 is correspondingly arranged at the top of each upper cavity 51. The magnet 8 is selected as a high-temperature resistant magnet 8, such as a samarium-cobalt magnet 8 resistant to 350 degrees Celsius high temperature. As long as it can withstand the high temperature of injection molding and the suction force is greater than the gravity of the upper skeleton 2; the distance between the magnet 8 and the upper cavity 51 will affect its adsorption force on the upper skeleton 2. If it is too thick, the magnetic force will weaken and the upper skeleton 2 cannot be adsorbed. If it is too thin, the mold strength is not enough and it is easy to be deformed by pressing. Finally, through multiple rounds of verification, the height distance ( Figure 3 shown as H in the figure) between the magnet 8 and the upper cavity 51 is 0.5 mm; the position dimension is also relatively important. If the position of the magnet 8 is exactly aligned and coincident with the top of the upper cavity 51, the strength of the top of the upper cavity 51 is not enough and it is easy to be pierced by pressing. Therefore, the magnet 8 should be arranged offset from the upper cavity 51, that is, on one side, the magnet 8 should be at most 3 mm away from the side of the upper cavity 51 ( Figure 3 shown as L in the figure). The specific situation at this time is as follows: The initial designed distance was 1.1 mm, but the adsorption force was insufficient and basically all the skeletons fell off. When it was reduced to 0.9 mm, 80% of them fell off, which initially showed some effect. When it was reduced to 0.7 mm, 50% fell off. When it was reduced to 0.6 mm, basically none fell off. However, during the operation and handling of the mold, due to vibration, some skeletons would still fall off, indicating that the adsorption force was still insufficient. When it was reduced to 0.5 mm, none fell off. After mass-producing 2,000 pieces, no skeleton falling-off situation occurred, so this size was set at 0.5 mm. At the initial design, there was no misalignment, and there was no problem when the thickness was 1.1 mm. But when it was gradually reduced to 0.5 mm later, because it was too thin, the wall thickness of the cavity deformed. To increase the strength of the isolation wall thickness, a misalignment method was adopted. Initially, a cylindrical magnet was directly used on the top without a hole in the middle, but this caused the column in the middle of the cavity to be under pressure and unable to bear the pressure, resulting in deformation. When the misalignment was 4 mm and 5 mm, the adsorption area of the magnet was small and the suction force was insufficient.

[0031] When the rubber is vulcanized, the mold temperature needs to reach about 200°. Here, a high-temperature resistant and strong magnet is required, and the magnet should not lose its magnetism due to high temperature and should always maintain its magnetism at high temperature. The position of the magnet in the mold is very important. If the distance between the magnet and the skeleton is too far, it cannot be adsorbed; if it is too close, the mold will be too thin and its strength is insufficient, making it easy to deform.

[0032] As Figure 3 shown, considering that the magnet 8 may age later and the suction force becomes insufficient, the magnet 8 needs to be replaced; or if the operator operates improperly and the skeleton is not placed in place, it may cause the mold to be damaged. The mold structure adopted in the present invention is a detachable core structure. The upper core 52 and the lower core 62 are respectively installed on the upper mold 5 and the lower mold 6 by countersunk head screws. An embedding hole 53 for installing the magnet 8 is provided on the upper core 52. The magnet 8 can be embedded by removing the upper core 52. Once the upper core 52, the lower core 62 are damaged or the magnet 8 ages, the countersunk head screws can be quickly removed and replaced at any time. As long as individual cavities are damaged, the amount of glue used in the whole mold, the vulcanization process, and the operation process will change accordingly, resulting in a change in the overall vulcanization efficiency, which is not conducive to the quality stability of the product. The core structure is easy to replace immediately, and the mold can be put into use as soon as possible without changing the vulcanization process, ensuring product consistency.

[0033] As Figure 2 shown, the injection glue system includes an injection glue cylinder 11 arranged in the upper mold 5, a spring 12 and a top block 13 arranged in the injection glue cylinder 11. A runner 14 is arranged in the upper mold 5 for connecting the injection glue cylinder 11 with the cavity; As Figure 4 shown, the cavities are connected and communicated by a uniform and reasonable layout of the connecting runner 9 (as Figure 4As shown in the figure and is connected to the output port of the runner 14, so that the position of each upper cavity 51 from the output port of the runner 14 is the same, ensuring that the amount of injected glue flowing into each cavity at the same time is the same, ensuring that each cavity can be filled with rubber simultaneously, and preventing the situation where some cavities are short of glue while some have started to leak glue. Only one injection cylinder 11 is processed, and the rubber used for all cavities is provided by this injection cylinder 11. During preforming, a single piece of rubber can be used, improving efficiency.

[0034] When adding raw materials, it is necessary to calculate the amount of rubber used for all cavities, and then calculate the volume of the injection cylinder 11. It is required that the volume of the injection cylinder 11 is greater than the sum of the volumes of all cavities, the volume of the runner 14, the volume of the connecting runner 9, and the material of the flash, so as to meet the requirement of sufficient injection. During injection molding, a single piece of rubber can be placed in the injection cylinder 11. For example, the single consumption of a product is 3g. Now there are 16 cavities, so 48g of rubber is required. Adding the rubber in the injection hole, the rubber in the runner 14, the connecting runner 9, and the flash of the injection cylinder 11 is 57.6g. Then calculate the volume space required for 57.6g of rubber. The injection cylinder 11 must have sufficient depth and diameter to hold 57.6g of rubber.

[0035] As Figure 4 shown, clearance structure: one end of the upper skeleton 2 is a convex table surface 21 and the other end is a warped surface 22. A convex platform 211 is provided on the convex table surface 21. A reserved hole 511 is provided at the top of the upper cavity 51. The diameter of the convex platform 211 is smaller than the diameter of the reserved hole 511, approximately 0.4 - 0.6mm, preferably 0.5mm. Here, it is only to illustrate the role of this clearance structure in product forming. As for the specific data, it still needs to be comprehensively considered and adjusted according to the product shape, magnet size, skeleton material, forming temperature, etc.

[0036] The height of the boss 211 is less than the depth of the reserved hole 511. During vulcanization, the boss 211 on the boss surface 21 of the upper skeleton 2 is inserted into the reserved hole 511, and the boss surface 21 is in close contact with the port surface of the reserved hole 511. With this setting, it can effectively prevent the glue from leaking to the boss surface 21 of the upper skeleton 2. Similarly, similar structures are also provided on the lower skeleton 3 and the lower cavity 61, which can effectively prevent the glue from leaking to the boss surface 21 of the lower skeleton 3 during injection molding. When making the skeleton stamping die, due to process limitations, one side of the punched skeleton is flat, and the other side is prone to having a curved surface (i.e., the warped surface 22). This curved surface side is prone to being uneven in the mold and prone to glue leakage. Mark the curved surface during skeleton stamping, and use the marked surface as the vulcanization surface during vulcanization. The boss surface 21 is the glue-sealing surface, which is better for glue sealing. By adopting a clearance structure, the smaller the contact area between the glue-sealing part of the skeleton and the mold, the less the glue-sealing effect is affected by the flatness of the skeleton, and the easier it is to seal the glue. Excessive vulcanization pressure will cause the rubber to flow too fast and the impact force to increase, resulting in the problem of glue leakage. After multiple tests and verifications, a vulcanization pressure of 5 MPa can not only ensure sufficient injection of glue into the cavity but also avoid defects such as glue overflow and glue leakage. Therefore, the low pressure value of 5 MPa is preferred.

[0037] As Figure 4 shown, after the upper skeleton 2 is placed in the upper cavity 51, the warped surfaces 22 (the surfaces that have undergone bending deformation compared to the plane) of the upper skeleton 2 and the lower skeleton 3 both face the top of the upper skeleton 2 cavity and the bottom of the lower skeleton 3 cavity. During injection molding after being placed, the rubber raw material first contacts the warped surface 22, and the non-warped surface 22 is the glue-sealing surface. In this way, it will avoid the situation of glue overflow due to the non-tight fit between the skeleton mold caused by the warping deformation of the skeleton. Another is that the glue-sealing surface adopts a clearance (i.e., the boss 211 is inserted into the reserved hole 511) method, and try to adjust the radial dimension of the fitting part between the skeleton and the mold to 0.5 mm (i.e., the diameter of the boss 211 is 0.5 mm smaller than the size of the reserved hole 511), minimizing the risk of glue overflow caused by possible deformation of the skeleton resulting in non-tight fit. There is also the pressure situation. If the pressure is high, the impact force of the rubber between the upper skeleton 2 and the top of the upper cavity is large, and the rubber will enter between the upper skeleton 2 and the top of the upper cavity 51 along the gap. After multiple tests and demonstrations here, the effect is the best at a vulcanization pressure of 5 MPa for the equipment. If it is less than 4 MPa, it will cause the rubber to not fill the space, the cavity pressure is insufficient, the density is low, and the adhesion is poor.

[0038] As Figure 4 shown, the flash thickness, that is, the gap between the upper cavity 51 and the lower cavity 61 (d in the figure), is kept consistent, and the best flash thickness for tearing is 0.05 mm. If it is greater than 0.1 mm, it will be difficult to tear the flash, and granular flash residues will appear after tearing. If it is less than 0.05 mm, the rubber will not be able to enter the cavity through the overflow groove. Therefore, 0.05 mm is the best thickness. By adopting an injection structure, the flash thickness is less affected by interference factors, has good consistency, and the thickness will not change and will always be at a thickness that is easy to tear the flash.

[0039] As Figures 1-5 shown, due to the limitation of the product structure, during vulcanization, the upper skeleton 2 needs to be placed in the upper cavity 51 of the upper mold 5. If the transmission scheme is adopted, when the automatic vulcanizing machine with a turning plate pulls the glue injection cylinder 11 away and the upper mold 5 is lifted above, it is very difficult for the operator to place the upper skeleton. The operator needs to look up and it is very difficult to place the skeletons one by one. For this reason, the upper mold 5 is connected to the lower mold 6 through a hinge structure 7. After the upper mold 5 is pried open by means of a lever and flipped to one side, both the upper cavity 51 and the lower cavity 61 face the operator, and it is very easy to take the product and place the skeleton. With this structure, the labor intensity is small, and both male and female operators can be competent, without specifically selecting male employees to do the job.

[0040] For the convenience of operation, this solution mainly focuses on three points. First, for the lifting of the glue injection cylinder 11, a compression spring 12 is used, which does not require much effort. As soon as the pressure exerted by the vulcanizing machine on the mold is removed, the compression spring 12 will lift and open the glue injection cylinder 11. Second, a hinge structure 7 is adopted. With a pry bar on the right side and using the lever principle, it is very easy to pry open the mold, and just the upper cavity 51 of the upper mold 5 is facing the operator. Third, for the process of taking out the product, an ejection mechanism in the lower mold 6 is adopted. Pressure is applied to the top plate 10, and the top plate 10 drives the ejector pin 15 to move. The ejector pin 15 ejects the product, which can effectively improve its automation performance.

[0041] A glue injection cylinder 11 is designed for the mold. Only one piece of rubber is required for preforming. Manually weigh the weight of the rubber blank and tear the mixed rubber by hand (the viscosity of silicone rubber is very high and it is easy to stick to the knife). Sealing the glue is a difficult point, and three means are adopted: First, the surface recognition of the skeleton, that is, it is divided into a warped surface 22 and a convex table surface 21; Second, an air avoidance structure is adopted between the glue-sealing surface of the skeleton and the mold; Third, the vulcanization pressure is reduced to 5 MPa.

[0042] If mechanical equipment is required to operate throughout the process, there is no such equipment on the market currently. If such equipment is specifically developed, the cost will be very high. The present invention can save the funds for specifically developing such equipment and can realize the production of similar products by using ordinary vulcanizing machines on the market.

[0043] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the technical solutions of the present invention, rather than limitations on the specific implementation manners of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the claims of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A mold for vulcanizing a double-sided skeleton silicone shock pad, characterized in that, Including: An upper mold (5) and a lower mold (6), wherein the upper mold (5) and the lower mold (6) are respectively provided with a plurality of corresponding upper cavities (51) and lower cavities (61), and when closed, the upper cavities (51) and the lower cavities (61) form a cavity for sealed vulcanization; A magnetic adsorption assembly, arranged in the top area of the upper mold (5), the magnetic adsorption assembly includes a magnet (8), the magnet (8) is arranged in a dislocation manner with the upper cavity (51) in the vertical direction, and the magnet (8) is isolated from the upper cavity (51); the magnet (8) is used for adsorbing the upper skeleton (2) of the silica gel shock pad; A reserved hole (511) is arranged on the top surface of the upper cavity (51), and a boss (211) is formed on the convex table surface (21) of the upper skeleton (2); the outer diameter of the boss (211) is smaller than the aperture of the reserved hole (511), and the height of the boss (211) is smaller than the depth of the reserved hole (511).

2. The mold for vulcanizing the double-sided skeleton silica gel damping pad according to claim 1, characterized in that: When the vertical distance between the bottom surface of the magnet (8) and the top surface of the upper cavity (51) is 0.5 mm, the dislocation distance between the side of the magnet (8) and the side edge of the upper cavity (51) in the transverse direction is not greater than 3 mm.

3. The mold for vulcanizing the double-sided skeleton silicone damping pad according to claim 1, wherein: The upper mold (5) and the lower mold (6) are respectively installed with an upper core (52) and a lower core (62) in a detachable manner, the upper cavity (51) is formed on the upper core (52), and the lower cavity (61) is formed on the lower core (62); An embedding hole (53) matching the shape of the magnet (8) is arranged in the top area of the upper core (52), the magnet (8) is fixed to the top of the upper core (52) through the embedding hole (53), and an isolation is formed between the embedding hole (53) and the upper cavity (51) through the body structure of the upper core (52).

4. The mold for vulcanizing the double-sided skeleton silicone damping pad according to claim 1, wherein: When the upper cavity (51) and the lower cavity (61) are closed, a gap is formed between their mating surfaces, and the width of the gap is 0.05 mm to form a flash layer during the injection molding process.

5. The mold for vulcanizing the double-sided skeleton silicone damping pad according to claim 1, characterized in that: The vulcanization pressure of the vulcanization mold during vulcanization is 5 MPa.

6. The mold for vulcanizing the double-sided skeleton silicone damping pad according to any one of claims 1-5, characterized in that: The heat-resistant temperature of the magnet (8) is not lower than 300 °C.

7. The mold for vulcanizing the double-sided skeleton silica gel damping pad according to any one of claims 1-5, characterized in that: The same side of the upper mold (5) and the lower mold (6) is connected through a hinge structure (7).

8. The mold for vulcanizing the double-sided skeleton silica gel shock pad according to any one of claims 1-5, characterized in that: A glue injection system is arranged in the upper mold (5), and the glue injection system includes a glue injection cylinder (11), arranged in the top area of the upper mold (5) for storing or conveying raw materials; A top block (13), slidably arranged in the glue injection cylinder (11), for extruding raw materials to flow into the cavity through the runner (14) in the upper mold (5); A spring (12), arranged between the top block (13) and the inner wall of the glue injection cylinder (11), for providing an elastic force to push the glue injection cylinder to open after the vulcanizing machine is removed, and the movement of the top block (13) extrudes raw materials into the runner (14) to inject glue by overcoming the elastic force of the spring (12) by an external force.

9. The mold for vulcanizing the double-sided skeleton silicone damping pad according to any one of claims 1-5, characterized in that: A ejection mechanism is arranged inside the lower mold (6), including a top plate (10) and ejector pins (15); the top plate (10) drives the ejector pins (15) to move in a preset direction to eject the vulcanized and formed double-sided skeleton silica gel shock pad.

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