Multi-layer composite sealing element forming device and process

Abstract

The invention relates to the technical field of sealing element production, in particular to a multi-layer composite sealing element forming device and process, the device comprises a fixed mold platform and a movable mold platform, the fixed mold platform is provided with a lower mold, the movable mold platform is provided with a movable plate, the movable plate is provided with an upper mold, the fixed mold platform is provided with a suction cup assembly, and the suction cup assembly is provided with a movable block; a frame is arranged at the lower end of one side of the movable block, a plurality of electric suction cups are arranged on the frame, the peripheral walls of the upper ends of the electric suction cups are slidably connected with the frame, a first air cylinder is installed on the top face of the movable block through an installation base, and the bottom face of a piston rod of the first air cylinder penetrates through the movable block and is fixedly connected with the top face of the middle of the frame; the peripheral walls of the upper ends of the guide rods are slidably connected with the moving blocks correspondingly. According to the demolding mechanism, the deformation or damage of the sealing element caused by non-uniform ejection of the ejection mechanism is avoided, the demolding efficiency is improved, the yield and the quality stability of the multi-layer composite sealing element are ensured, and the demolding requirements of the sealing elements with different specifications and requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of seal production, in particular to a multi-layer composite seal molding device and process. Background Art

[0002] Multi-layer composite seals are composed of a series of layers with different materials and characteristics. Each layer has a specific sealing function and works together to prevent the leakage of fluids or gases. This seal is usually composed of an inner layer, a middle layer and an outer layer. Each layer has different materials and structures to meet the sealing needs under different working environments and requirements. In the manufacturing process of multi-layer composite seals, compression molding is a crucial step; After searching, the Chinese patent with announcement number CN221622797U provides a hydraulic molding manufacturing equipment for seals. Through the ejection mechanism, when one group of lower modules moves to the middle position, the other group of lower modules will move to the edge. The rotating rod in the lower module that moves to the edge will drive the lifting block to move upward and eject the pressure plate from the inside of the lower module. At this time, it is convenient to take out and replace the seals completed by hydraulic pressure, and there is no need to set ejection structures such as springs inside the lower module. However, it was found during use that when the seal has an irregular shape or is large in size, it is difficult for the ejection mechanism to eject the seal from the mold evenly. Some seals are easily attached to the inner wall of the mold and are difficult to eject, which can easily cause deformation or damage to the seal. The seal still needs to be manually removed after demolding, which affects the molding efficiency and quality of the multi-layer composite seals and is not conducive to the molding and use of the multi-layer composite seals. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a multi-layer composite seal molding device and process, which avoids deformation or damage of the seal caused by uneven ejection of the ejection mechanism, improves the demolding efficiency, ensures the yield and quality stability of the multi-layer composite seal, and adapts to the demolding needs of seals of different specifications and requirements.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a multi-layer composite sealing molding device, comprising a fixed mold platform and a movable mold platform, the fixed mold platform is provided with a lower mold, the movable mold platform is provided with a movable plate, the movable plate is installed with an upper mold, the fixed mold platform is installed with a suction cup assembly, the suction cup assembly is provided with a moving block, a frame is provided at the lower end of one side of the moving block, a plurality of electric suction cups are provided on the frame, the outer peripheral wall of the upper end of the electric suction cup is slidably connected to the frame, a first cylinder is installed on the top surface of the moving block through a mounting seat, the bottom surface of the piston rod of the first cylinder passes through the moving block and is fixedly connected to the top surface of the middle part of the frame, a plurality of guide rods are fixedly provided on the top surface of the frame, the outer peripheral walls of the upper ends of the plurality of guide rods are respectively slidably connected to the moving block, the lower ends of the guide rods are respectively slidably connected with lifting blocks, and the lifting blocks are respectively fixedly connected to the outer peripheral walls of the upper ends of the electric suction cups.

[0005] Preferably, a first spring is sleeved on the outer peripheral wall of the electric suction cup, and two ends of the first spring are respectively abutted against the lifting block and the frame, a T-shaped block is fixedly provided on the side wall of the moving block, a push block is slidably connected to the T-shaped block, a second cylinder is installed on the moving block through a mounting seat, a piston rod of the second cylinder is fixedly connected to the side wall of the push block, a third cylinder is installed on the top surface of the push block through a mounting seat, and a rubber round block is fixedly provided on the bottom surface of the piston rod of the third cylinder.

[0006] Through the above technical solution, the restoring force of the first spring pushes the lifting block to return to the initial position, so that the electric suction cup on the corresponding lifting block drives the entire film rubber ring to move upward and demold from the lower mold.

[0007] Preferably, a bracket is fixedly provided on the fixed mold platform, a rotating column is rotatably connected to the bracket, a worm wheel is installed on the outer peripheral wall of the lower end of the rotating column through a mounting seat, a worm is meshingly connected to the worm wheel, a first servo motor is installed on the side wall of the bracket through a mounting seat, the output shaft of the first servo motor is coaxially connected to the worm, one end of the worm is rotatably connected to a support, and the bottom surface of the support is fixedly connected to the top surface of the bracket.

[0008] Through the above technical solution, the worm is meshed with the worm wheel to make the rotating column rotate along the bracket, driving the positioning block and the moving block to rotate synchronously, and after the frame and the whole film rubber ring are rotated to the appropriate position, the electric suction cup is separated from the whole film rubber ring to complete the demoulding operation.

[0009] Preferably, a positioning block is fixedly provided on the top surface of the rotating column, the moving block is slidably connected to the positioning block, a fourth cylinder is installed on the top surface of the positioning block through a front end mounting seat, a trapezoidal block is fixedly provided on the top surface of the moving block, the piston rod of the fourth cylinder is fixedly connected to the trapezoidal block, and a plurality of counterweight blocks are installed on the side of the moving block away from the first cylinder.

[0010] Through the above technical solution, the piston rod of the fourth cylinder drives the trapezoidal block to move, so that the trapezoidal block drives the moving block to slide along the positioning block, and moves the frame and the whole film rubber ring to one side of the positioning block.

[0011] Preferably, a mounting groove is provided on the side wall of the fixed mold platform, the lower mold is plugged into and matched with the fixed mold platform through the mounting groove, the lower mold is connected to an injection tube, a slot is provided on the side wall of the fixed mold platform, a shift block is plugged into the slot, a through slot is provided in the middle of the shift block, a limit block is slidably connected inside the through slot, the limit block is fixedly connected to the fixed mold platform, a second spring is fixedly provided in the middle of the limit block, the second spring is located inside the through slot, one end of the second spring is fixedly connected to the shift block, and two shift rods are fixedly provided on the shift block in a symmetrical structure.

[0012] Through the above technical solution, the shifting block blocks and positions the lower mold, thereby improving the replacement efficiency of the lower mold and ensuring the accuracy of the installation of the lower mold.

[0013] Preferably, a hydraulic cylinder is installed on the middle part of the top surface of the movable mold platform through a mounting seat, the bottom surface of the piston rod of the hydraulic cylinder is fixedly connected to the top surface of the movable plate, sliding rods are respectively fixed at the four corners of the top surface of the movable plate, and the outer peripheral walls of the plurality of sliding rods are respectively slidably connected to the movable mold platform, and a vacuum pump is installed on the top surface of the movable mold platform through a mounting seat, and a suction pipe is provided on the vacuum pump, and the suction pipe is a spring pipe, and the lower end of the suction pipe passes through the upper mold and is connected with the mold cavity.

[0014] Through the above technical solution, the vacuum is drawn out before injection molding and mold closing to form the mold, so as to remove air and impurities in the mold cavity and reduce bubbles and defects in the injection molding process.

[0015] Preferably, it also includes a demoulding component, the demoulding component is provided with a fixed block, the fixed block is fixedly arranged on the outer wall of the fixed mold platform, a slider is slidably connected to the fixed block, a rack is installed at the concave part of the top surface of the slider, two connecting blocks are fixedly arranged on the side wall of the upper end of the fixed block, a gear is provided between the two connecting blocks, the gear is meshingly connected with the rack, a rotating shaft is fixedly arranged in the middle of the gear, the outer peripheral walls at both ends of the rotating shaft are rotatably connected with the two connecting blocks respectively, a second servo motor is installed on the side wall of the fixed block through a mounting seat, and the output shaft of the second servo motor is coaxially connected with the rotating shaft.

[0016] Through the above technical solution, the output shaft of the second servo motor drives the rotating shaft to rotate, so that the gear meshes and transmits to the rack, so that the slider slides along the fixed block, pushing the hollow block to move to the upper end of the lower mold.

[0017] Preferably, a blower is installed on the outer wall of the lower end of the fixed block through a mounting seat, the output end of the blower is connected to an air outlet pipe, the middle part of the air outlet pipe is a spring tube, the outer peripheral wall of the air outlet pipe is slidably connected to a stabilizing block, and the stabilizing block is fixedly connected to the upper end of the fixed block.

[0018] Preferably, a hollow block is fixedly provided at one end of the sliding block, a plurality of air outlet holes are opened on the inclined surface of the hollow block, and one end of the air outlet pipe is connected to the hollow block.

[0019] Through the above technical solution, the external air is transported to the inside of the air outlet pipe by the blower and sprayed to the outside from the air outlet, and the blown air is used to quickly assist the entire film rubber ring to be completely and orderly separated from the lower mold.

[0020] A process for a multi-layer composite seal molding device comprises the following steps: S1: 48 to 60 parts by weight of nitrile rubber, 16 to 21 parts by weight of fluororubber and 8 to 13 parts by weight of polytetrafluoroethylene are put into a mixer and mixed at a mixing temperature of 25° C. to 40° C. for 5 to 10 minutes; S2: During the stirring process, 3 to 7 parts by weight of a plasticizer are sequentially added to the mixed basic composite material, and mixed for 10 minutes, followed by adding 0.8 to 2.1 parts by weight of a vulcanizer, 0.4 to 1.2 parts by weight of an accelerator, and 0.15 to 0.6 parts by weight of an antioxidant, and mixing is continued for 10 minutes, and then 0.16 to 0.65 parts by weight of a colorant and 0.25 to 0.72 parts by weight of a flame retardant are added, and mixed for another 5 minutes to prepare a raw material for a multilayer composite seal, and finally the raw material for the multilayer composite seal is transported to an extruder for stirring and plasticizing, and the molten material is injected into the mold cavity between the lower mold and the upper mold by the extruder for compression molding; S3: After the multi-layer composite seal is molded to the whole film rubber ring, the mold is opened, and the movable plate drives the upper mold to move to the upper end. At this time, the whole film rubber ring is attached to the top surface of the lower mold. The frame is driven to move above the lower mold by the moving block, and the piston rod of the first cylinder drives the frame to drive the guide rod to move synchronously toward the lower mold. Multiple guide rods slide along the moving block, so that multiple electric suction cups are synchronously moved to a suitable use height, and the whole film rubber ring on the top surface of the lower mold is adsorbed and demolded by the electric suction cup; S4: During the demoulding process, after the electric suction cup is moved to the top of the whole film rubber ring, the piston rod of the second cylinder pushes the push block to slide along the T-shaped block, driving the third cylinder and the rubber round block to move synchronously, and the rubber round block presses the lifting block in turn, so that the corresponding lifting block and the electric suction cup thereon move downward synchronously, and the lifting block slides along the bottom of the guide rod, and the first spring is compressed by the lifting block, so that the moving electric suction cup and the whole film rubber ring are attracted, and at this time, the piston rod of the third cylinder drives the rubber round block to return to the initial position, and the restoring force of the first spring drives the lifting block to return to the initial position, so that the electric suction cup on the corresponding lifting block drives the whole film rubber ring to move upward and demould from the lower mold; S5: After the demoulding is completed, the whole film rubber ring is driven by the piston rod of the fourth cylinder to move the trapezoidal block, so that the trapezoidal block drives the moving block to slide along the positioning block, and the frame and the whole film rubber ring are moved to one side of the positioning block. After moving to a suitable position, the output shaft of the first servo motor drives the worm to rotate along the support, so that the worm is meshed and transmitted to the worm wheel, so that the rotating column rotates along the bracket, driving the positioning block and the moving block to rotate synchronously, and after the frame and the whole film rubber ring are rotated to a suitable position, the electric suction cup is separated from the whole film rubber ring, and the demoulding operation is completed; S6: Before injection molding, the upper mold and the lower mold of suitable model and size are installed through the installation groove, and the lever is pulled to make the shift block slide along the slot and the limit block. At this time, the second spring is compressed, and the lower mold is installed and replaced through the installation groove. After the replacement is completed, the lever is released to make the shift block return to the initial position, and the shift block blocks and positions the lower mold; After positioning is completed, the molten material is injected into the mold cavity between the lower mold and the upper mold through external equipment. Before injecting the molten material, the mold cavity is evacuated through the suction pipe of the vacuum pump. After the vacuum is evacuated, the injection molding is performed to close the mold until the molding is formed. S7: While demoulding through the suction cup assembly, the output shaft of the second servo motor drives the shaft to rotate, so that the gear meshes and transmits to the rack, so that the slider slides along the fixed block, pushing the hollow block to move to the upper end of the lower mold, and the hollow block drives the outer peripheral wall of one end of the air outlet pipe to slide along the stabilizing block. At this time, the whole film rubber ring located under the hollow block is sucked in by the electric suction cup, and the external air is transported to the inside of the air outlet pipe by the blower, and sprayed to the outside through the air outlet hole, so that the blown air quickly separates the whole film rubber ring from the lower mold.

[0021] Beneficial effects of the present invention: 1. After the multi-layer composite seal is molded to the whole film rubber ring, the mold is opened, and the movable plate drives the upper mold to move to the upper end. At this time, the whole film rubber ring is attached to the top surface of the lower mold, and the frame is driven to move to the top of the lower mold through the moving block. The piston rod of the first cylinder pushes the frame to drive the guide rod to move synchronously in the direction of the lower mold. Multiple guide rods slide along the moving block, so that multiple electric suction cups are synchronously moved to a suitable use height, and then the whole film rubber ring on the top surface of the lower mold is adsorbed and demolded by the electric suction cup. The electric suction cup adsorbs the whole film rubber ring more stably, avoiding deformation or damage of the seal caused by uneven ejection of the ejection mechanism, improving the demoulding efficiency, enhancing the demoulding quality, ensuring the yield rate and quality stability of the multi-layer composite seal, and adapting to the demoulding needs of seals with different specifications and requirements.

[0022] 2. The rubber round block presses the lifting block in turn, so that the corresponding lifting block and the electric suction cup thereon move downward synchronously, and the lifting block slides along the bottom of the guide rod. The first spring is compressed by the lifting block, so that the moving electric suction cup is attracted to the whole film rubber ring. At this time, the piston rod of the third cylinder drives the rubber round block to return to the initial position, and the restoring force of the first spring pushes the lifting block to return to the initial position, so that the electric suction cup on the corresponding lifting block drives the whole film rubber ring to move upward and demold from the lower mold; the problem of seal damage or incomplete demolding caused by improper demolding height is avoided, the smooth demolding of the whole film rubber ring is ensured, the integrity of the whole film rubber ring and the seal is protected, and the occurrence of damage during the demolding process is reduced.

[0023] 3. The trapezoidal block is driven to move by the piston rod of the fourth cylinder, so that the trapezoidal block drives the moving block to slide along the positioning block, and the frame and the whole film rubber ring are moved to one side of the positioning block. After moving to the appropriate position, the worm is driven to rotate along the support by the output shaft of the first servo motor, so that the worm is meshed and transmitted to the worm wheel, so that the rotating column rotates along the bracket, and the positioning block and the moving block are driven to rotate synchronously. After the frame and the whole film rubber ring are rotated to the appropriate position, the electric suction cup is separated from the whole film rubber ring to complete the demoulding operation, thereby improving the production efficiency, flexibly controlling the moving distance and rotation angle of the whole film rubber ring, and adapting to the processing needs of seals with different specifications and requirements.

[0024] 4. Install the upper mold and lower mold of appropriate model and size through the installation groove, pull the lever to make the shift block slide along the slot and the limit block. At this time, the second spring is compressed, and the lower mold is installed and replaced through the installation groove. After the replacement is completed, release the lever to return the shift block to its initial position. The shift block blocks and positions the lower mold, which improves the replacement efficiency of the lower mold and ensures the accuracy of the installation of the lower mold, laying a good foundation for the subsequent injection molding process, preventing the lower mold from being displaced during the injection molding process, and ensuring the dimensional accuracy and appearance quality of the injection molded product.

[0025] 5. The molten material is injected into the mold cavity between the lower mold and the upper mold through external equipment. Before injecting the molten material, the mold cavity is evacuated through the suction tube of the vacuum pump. After the vacuum is evacuated, the injection molding is performed and the mold is closed to form. The air and impurities in the mold cavity are removed, the bubbles and defects in the injection molding process are reduced, and the quality and performance of the injection molded products are improved.

[0026] 6. As the electric suction cup is lifted and lowered from one side of the lower mold to the other side in sequence, the whole film rubber ring is gradually separated from the lower mold. During this process, the hollow block and the air outlet are adaptively moved according to the separation position of the whole film rubber ring from the lower mold, and always remain in a favorable demoulding position. The external air is transported to the inside of the air outlet pipe by the blower and sprayed to the outside from the air outlet. The blown air is used to quickly assist the whole film rubber ring to be separated from the lower mold in an orderly manner, thereby improving the efficiency and quality of demoulding, reducing the risk of damage to the seal during demoulding, and ensuring the integrity and yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear perspective view of the movable mold platform structure of the present invention; Figure 3 It is a schematic diagram of the movable plate structure of the present invention; Figure 4 It is a schematic diagram of the assembly of the lower mold structure of the present invention; Figure 5 It is a schematic diagram of the structure of the shifting block of the present invention; Figure 6 It is a schematic diagram of the structure of the suction cup assembly of the present invention; Figure 7 It is a rear perspective view of the frame structure of the present invention; Figure 8 It is a rear perspective view of the push block structure of the present invention; Fig. 9 It is a schematic diagram of the assembly of the push block structure of the present invention; Fig.10 It is a schematic diagram of the worm gear structure of the present invention; Fig.11 A bottom-up stereoscopic view of the demoulding assembly structure of the present invention; Fig.12 It is a schematic diagram of the gear structure of the present invention.

[0028] In the figure: 1, fixed mold platform; 2, movable mold platform; 3, lower mold; 4, movable plate; 5, upper mold; 6, suction cup assembly; 601, moving block; 602, frame; 603, electric suction cup; 604, guide rod; 605, lifting block; 606, first spring; 607, T-shaped block; 608, push block; 609, second cylinder; 610, third cylinder; 611, rubber round block; 612, bracket; 613, rotating column; 614, worm gear; 615, worm; 616, first servo motor; 617, support; 618, positioning block; 619, fourth cylinder; 620, trapezoidal block; 621 , counterweight block; 622, first cylinder; 7, mounting groove; 8, injection molding tube; 9, slot; 10, shift block; 11, through groove; 12, limit block; 13, second spring; 14, shift rod; 15, hydraulic cylinder; 16, slide rod; 17, vacuum pump; 18, suction pipe; 19, demoulding assembly; 1901, fixed block; 1902, slider; 1903, rack; 1904, connecting block; 1905, gear; 1906, rotating shaft; 1907, second servo motor; 1908, blower; 1909, air outlet pipe; 1910, stabilizing block; 1911, hollow block; 1912, air outlet. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Embodiment 1, as Figure 1 , Figure 2 , Figure 3 , Figures 6 to 10 As shown, this embodiment provides a multi-layer composite seal molding device, including a fixed mold platform 1 and a movable mold platform 2, the fixed mold platform 1 is provided with a lower mold 3, the movable mold platform 2 is provided with a movable plate 4, the movable plate 4 is provided with an upper mold 5, the fixed mold platform 1 is provided with a suction cup assembly 6, the suction cup assembly 6 is provided with a moving block 601, a frame 602 is provided at the lower end of one side of the moving block 601, a plurality of electric suction cups 603 are provided on the frame 602, and the outer peripheral wall of the upper end of the electric suction cup 603 is connected to the frame 602 is slidably connected, and a first cylinder 622 is installed on the top surface of the moving block 601 through a mounting seat. The bottom surface of the piston rod of the first cylinder 622 passes through the moving block 601 and is fixedly connected to the middle top surface of the frame 602. A plurality of guide rods 604 are fixedly arranged on the top surface of the frame 602. The upper peripheral walls of the plurality of guide rods 604 are slidably connected to the moving block 601 respectively. The lower ends of the guide rods 604 are slidably connected to lifting blocks 605 respectively. The lifting blocks 605 are fixedly connected to the upper peripheral walls of the electric suction cups 603 respectively.

[0031] A first spring 606 is sleeved on the outer peripheral wall of the electric suction cup 603, and the two ends of the first spring 606 are respectively abutted against the lifting block 605 and the frame 602, a T-shaped block 607 is fixedly provided on the side wall of the moving block 601, and a push block 608 is slidably connected to the T-shaped block 607, and a second cylinder 609 is installed on the moving block 601 through a mounting seat, and the piston rod of the second cylinder 609 is fixedly connected to the side wall of the push block 608, and a third cylinder 610 is installed on the top surface of the push block 608 through a mounting seat, and a rubber round block 611 is fixedly provided on the bottom surface of the piston rod of the third cylinder 610; the restoring force of the first spring 606 pushes the lifting block 605 to return to its initial position, so that the electric suction cup 603 on the corresponding lifting block 605 drives the entire film rubber ring to move upward and demold from the lower mold 3.

[0032] A bracket 612 is fixed on the fixed mold platform 1, and a rotating column 613 is rotatably connected to the bracket 612. A worm wheel 614 is installed on the outer peripheral wall of the lower end of the rotating column 613 through a mounting seat, and a worm 615 is meshedly connected to the worm wheel 614. A first servo motor 616 is installed on the side wall of the bracket 612 through a mounting seat. The output shaft of the first servo motor 616 is coaxially connected to the worm 615, and one end of the worm 615 is rotatably connected to a support 617, and the bottom surface of the support 617 is fixedly connected to the top surface of the bracket 612; the worm 615 meshes and transmits to the worm wheel 614, so that the rotating column 613 rotates along the bracket 612, drives the positioning block 618 and the moving block 601 to rotate synchronously, and after the frame 602 and the whole film rubber ring are rotated to a suitable position, the electric suction cup 603 is separated from the whole film rubber ring to complete the demoulding operation.

[0033] A positioning block 618 is fixedly provided on the top surface of the rotating column 613, and the moving block 601 is slidably connected to the positioning block 618. A fourth cylinder 619 is installed on the top surface of the positioning block 618 through a front end mounting seat. A trapezoidal block 620 is fixedly provided on the top surface of the moving block 601, and a piston rod of the fourth cylinder 619 is fixedly connected to the trapezoidal block 620. A plurality of counterweight blocks 621 are installed on the side of the moving block 601 away from the first cylinder 622. The trapezoidal block 620 is driven to move by the piston rod of the fourth cylinder 619, so that the trapezoidal block 620 drives the moving block 601 to slide along the positioning block 618, and moves the frame 602 and the entire film rubber ring to one side of the positioning block 618.

[0034] When in use, after the multi-layer composite seal is molded to the whole film rubber ring, the mold is opened, so that the movable plate 4 drives the upper mold 5 to move to the upper end. At this time, the whole film rubber ring is attached to the top surface of the lower mold 3, and the frame 602 is driven to move above the lower mold 3 by the moving block 601. The piston rod of the first cylinder 622 pushes the frame 602 to drive the guide rod 604 to move synchronously in the direction of the lower mold 3. Multiple guide rods 604 slide along the moving block 601, so that multiple electric suction cups 603 are synchronously moved to a suitable use height, and then the whole film rubber ring on the top surface of the lower mold 3 is adsorbed and demolded by the electric suction cup 603. The electric suction cup 603 adsorbs the whole film rubber ring more stably, avoids deformation or damage of the seal caused by uneven ejection of the ejection mechanism, improves the demoulding efficiency, enhances the demoulding quality, ensures the yield rate and quality stability of the multi-layer composite seal, and adapts to the demoulding needs of seals with different specifications and requirements; During the demoulding process, after the electric suction cup 603 is moved above the whole film rubber ring, the piston rod of the second cylinder 609 pushes the push block 608 to slide along the T-shaped block 607, driving the third cylinder 610 and the rubber round block 611 to move synchronously, and the rubber round block 611 presses the lifting block 605 in turn, so that the corresponding lifting block 605 and the electric suction cup 603 thereon move downward synchronously, and the lifting block 605 slides along the bottom of the guide rod 604, and the first spring 606 is compressed by the lifting block 605, so that the moving electric suction cup 603 is attracted to the whole film rubber ring; At this time, the piston rod of the third cylinder 610 drives the rubber round block 611 to return to the initial position, and the restoring force of the first spring 606 pushes the lifting block 605 to return to the initial position, so that the electric suction cup 603 on the corresponding lifting block 605 drives the whole film rubber ring to move upward and demold from the lower mold 3; thereby avoiding the problem of seal damage or incomplete demolding caused by improper demolding height, ensuring the smooth demolding of the whole film rubber ring, protecting the integrity of the whole film rubber ring and the seal, and reducing the occurrence of damage during the demolding process; After demoulding, the whole film rubber ring is driven by the piston rod of the fourth cylinder 619 to move the trapezoidal block 620, so that the trapezoidal block 620 drives the moving block 601 to slide along the positioning block 618, and moves the frame 602 and the whole film rubber ring to one side of the positioning block 618. After moving to a suitable position, the output shaft of the first servo motor 616 drives the worm 615 to rotate along the support 617, so that the worm 615 engages and transmits to the worm wheel 614, so that the rotating column 613 rotates along the bracket 612, drives the positioning block 618 and the moving block 601 to rotate synchronously, and after the frame 602 and the whole film rubber ring are rotated to a suitable position, the electric suction cup 603 is separated from the whole film rubber ring to complete the demoulding operation, thereby improving production efficiency, flexibly controlling the moving distance and rotation angle of the whole film rubber ring, and adapting to the processing needs of seals with different specifications and requirements.

[0035] Embodiment 2, as Figures 1 to 5As shown, this embodiment is based on the previous embodiment, and is different from the previous embodiment in that a mounting groove 7 is provided on the side wall of the fixed mold platform 1, and the lower mold 3 is plugged and matched with the fixed mold platform 1 through the mounting groove 7, and an injection tube 8 is connected to the lower mold 3, and a slot 9 is provided on the side wall of the fixed mold platform 1, and a shift block 10 is plugged into the slot 9, and a through slot 11 is provided in the middle of the shift block 10, and a limit block 12 is slidably connected inside the through slot 11, and the limit block 12 is fixedly connected to the fixed mold platform 1, and a second spring 13 is fixedly provided in the middle of the limit block 12, and the second spring 13 is located inside the through slot 11, and one end of the second spring 13 is fixedly connected to the shift block 10, and two shift rods 14 are fixedly provided on the shift block 10 in a symmetrical structure; the shift block 10 blocks and positions the lower mold 3, thereby improving the replacement efficiency of the lower mold 3 and ensuring the accuracy of the installation of the lower mold 3.

[0036] A hydraulic cylinder 15 is installed in the middle of the top surface of the movable mold platform 2 through a mounting seat, and the bottom surface of the piston rod of the hydraulic cylinder 15 is fixedly connected to the top surface of the movable plate 4. Slide rods 16 are fixed at the four corners of the top surface of the movable plate 4, and the outer peripheral walls of multiple slide rods 16 are respectively slidably connected to the movable mold platform 2. A vacuum pump 17 is installed on the top surface of the movable mold platform 2 through a mounting seat. A suction pipe 18 is provided on the vacuum pump 17. The suction pipe 18 is a spring pipe. The lower end of the suction pipe 18 passes through the upper mold 5 and is connected with the mold cavity; after the vacuum is evacuated, the injection mold is closed to form, and the air and impurities in the mold cavity are removed, thereby reducing bubbles and defects during the injection molding process.

[0037] Before injection molding, the upper mold 5 and the lower mold 3 of suitable models and sizes are installed through the installation groove 7, and the lever 14 is pulled to make the shift block 10 slide along the slot 9 and the limit block 12. At this time, the second spring 13 is compressed, and the lower mold 3 is installed and replaced through the installation groove 7. After the replacement is completed, the lever 14 is released to make the shift block 10 return to the initial position. The shift block 10 blocks and positions the lower mold 3, which improves the replacement efficiency of the lower mold 3 and ensures the accuracy of the installation of the lower mold 3, laying a good foundation for the subsequent injection molding process, preventing the lower mold 3 from being displaced during the injection molding process, and ensuring the dimensional accuracy and appearance quality of the injection molded product; After positioning is completed, the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 through external equipment. Before injecting the molten material, the mold cavity is evacuated through the suction pipe 18 of the vacuum pump 17. After the vacuum is evacuated, the injection molding is carried out and the mold is closed to form the shape, so as to eliminate the air and impurities in the mold cavity, reduce bubbles and defects during the injection molding process, and improve the quality and performance of the injection molded product.

[0038] Embodiment three, as Figure 1 , Figure 2 , Figure 3 , Fig.11 and Fig.12As shown, this embodiment is based on the previous embodiment, and is different from the previous embodiment in that it also includes a demoulding component 19, the demoulding component 19 is provided with a fixed block 1901, the fixed block 1901 is fixedly arranged on the outer wall of the fixed mold platform 1, a slider 1902 is slidably connected to the fixed block 1901, a rack 1903 is installed at the concave part of the top surface of the slider 1902, two connecting blocks 1904 are fixedly arranged on the side wall of the upper end of the fixed block 1901, a gear 1905 is arranged between the two connecting blocks 1904, the gear 1905 is meshed and connected with the rack 1903, and the gear 1905 is meshed and connected with the rack 1903. A rotating shaft 1906 is fixedly provided in the middle of 905, and the outer peripheral walls at both ends of the rotating shaft 1906 are rotatably connected to the two connecting blocks 1904 respectively. A second servo motor 1907 is installed on the side wall of the fixed block 1901 through a mounting seat, and the output shaft of the second servo motor 1907 is coaxially connected to the rotating shaft 1906; the rotating shaft 1906 is driven to rotate by the output shaft of the second servo motor 1907, so that the gear 1905 is meshed and transmitted to the rack 1903, so that the slider 1902 slides along the fixed block 1901, and pushes the hollow block 1911 to move to the upper end of the lower mold 3.

[0039] A blower 1908 is installed on the outer wall of the lower end of the fixed block 1901 through a mounting seat, and the output end of the blower 1908 is connected to an air outlet pipe 1909. The middle part of the air outlet pipe 1909 is a spring tube, and a stabilizing block 1910 is slidably connected to the outer wall of the air outlet pipe 1909. The stabilizing block 1910 is fixedly connected to the upper end of the fixed block 1901, and a hollow block 1911 is fixedly provided at one end of the slider 1902. A plurality of air outlet holes 1912 are provided on the inclined surface of the hollow block 1911, and one end of the air outlet pipe 1909 is connected to the hollow block 1911; external air is transported to the inside of the air outlet pipe 1909 through the blower 1908, and is sprayed to the outside from the air outlet holes 1912, and the blown air is used to quickly assist the entire film rubber ring to be completely and orderly separated from the lower mold 3.

[0040] During demoulding, while demoulding through the suction cup assembly 6, the output shaft of the second servo motor 1907 drives the rotating shaft 1906 to rotate, so that the gear 1905 meshes and transmits to the rack 1903, so that the slider 1902 slides along the fixed block 1901, and pushes the hollow block 1911 to move to the upper end of the lower mold 3. The hollow block 1911 drives the outer peripheral wall of one end of the air outlet pipe 1909 to slide along the stabilizing block 1910. At this time, the whole film rubber ring located below the hollow block 1911 is sucked in by the electric suction cup 603. As the electric suction cup 603 is lifted and lowered from one side of the lower mold 3 to the other side in sequence, the whole film rubber ring is gradually separated from the lower mold 3. In this process, the hollow block 1911 and the air outlet 1912 are adaptively moved according to the separation position of the whole film rubber ring and the lower mold 3, and are always kept in a favorable demoulding position; External air is transported to the interior of the air outlet pipe 1909 through the blower 1908 and sprayed to the outside from the air outlet hole 1912. The blown air is used to quickly assist the entire film rubber ring to be completely and orderly separated from the lower mold 3, thereby improving the efficiency and quality of demolding, reducing the risk of damage to the seal during the demolding process, and ensuring the integrity and yield rate of the product.

[0041] Embodiment 4, a process for forming a multi-layer composite seal, comprising the following steps: S1: 48 parts by weight of nitrile rubber, 16 parts by weight of fluororubber and 8 parts by weight of polytetrafluoroethylene are put into a mixer and mixed at a mixing temperature of 25° C. for 3 minutes; S2: During the stirring process, 3 parts by weight of plasticizer are sequentially added to the mixed basic composite material, and mixed for 7 minutes, followed by adding 0.8 parts by weight of vulcanizer, 0.4 parts by weight of accelerator and 0.15 parts by weight of antioxidant, and mixing is continued for 8 minutes, and then 0.16 parts by weight of colorant and 0.25 parts by weight of flame retardant are added, and mixed for another 4 minutes to prepare the raw materials of the multi-layer composite seal, and finally the raw materials of the multi-layer composite seal are transported to the extruder for stirring and plasticizing, and the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 by the extruder for compression molding; S3: After the multi-layer composite seal is molded to the whole film rubber ring, the mold is opened, and the movable plate 4 drives the upper mold 5 to move to the upper end. At this time, the whole film rubber ring is attached to the top surface of the lower mold 3. The frame 602 is driven to move above the lower mold 3 by the moving block 601. The piston rod of the first cylinder 622 drives the frame 602 to drive the guide rod 604 to move synchronously toward the lower mold 3. Multiple guide rods 604 slide along the moving block 601, so that multiple electric suction cups 603 are synchronously moved to a suitable use height, and the whole film rubber ring on the top surface of the lower mold 3 is adsorbed and demolded by the electric suction cup 603; S4: During the demoulding process, after the electric suction cup 603 is moved above the whole film rubber ring, the piston rod of the second cylinder 609 pushes the push block 608 to slide along the T-shaped block 607, driving the third cylinder 610 and the rubber round block 611 to move synchronously, and the rubber round block 611 presses the lifting block 605 in turn, so that the corresponding lifting block 605 and the electric suction cup 603 thereon move downward synchronously, and the lifting block 605 slides under the guide rod 604, and the first spring 606 is compressed by the lifting block 605, so that the moving electric suction cup 603 is attracted to the whole film rubber ring, and at this time, the piston rod of the third cylinder 610 drives the rubber round block 611 to return to the initial position, and the restoring force of the first spring 606 drives the lifting block 605 to return to the initial position, so that the electric suction cup 603 on the corresponding lifting block 605 drives the whole film rubber ring to move upward and demould from the lower mold 3; S5: After the demoulding is completed, the whole film rubber ring is driven by the piston rod of the fourth cylinder 619 to move the trapezoidal block 620, so that the trapezoidal block 620 drives the moving block 601 to slide along the positioning block 618, and the frame 602 and the whole film rubber ring are moved to one side of the positioning block 618. After moving to a suitable position, the output shaft of the first servo motor 616 drives the worm 615 to rotate along the support 617, so that the worm 615 is meshed and transmitted to the worm wheel 614, so that the rotating column 613 rotates along the bracket 612, and the positioning block 618 and the moving block 601 are driven to rotate synchronously. After the frame 602 and the whole film rubber ring are rotated to a suitable position, the electric suction cup 603 is separated from the whole film rubber ring to complete the demoulding operation; S6: Before injection molding, the upper mold 5 and the lower mold 3 of appropriate models and sizes are installed through the installation groove 7, and the lever 14 is pulled to make the shift block 10 slide along the slot 9 and the limit block 12. At this time, the second spring 13 is compressed, and the lower mold 3 is installed and replaced through the installation groove 7. After the replacement is completed, the lever 14 is released to make the shift block 10 return to the initial position, and the shift block 10 blocks and positions the lower mold 3; After positioning is completed, the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 through an external device. Before injecting the molten material, the mold cavity is evacuated through the suction pipe 18 of the vacuum pump 17, and the injection molding is performed after the vacuum is evacuated until the mold is formed; S7: While demoulding through the suction cup assembly 6, the output shaft of the second servo motor 1907 drives the rotating shaft 1906 to rotate, so that the gear 1905 meshes and transmits to the rack 1903, so that the slider 1902 slides along the fixed block 1901, and pushes the hollow block 1911 to move to the upper end of the lower mold 3. The hollow block 1911 drives the outer peripheral wall of one end of the air outlet pipe 1909 to slide along the stabilizing block 1910. At this time, the whole film rubber ring located below the hollow block 1911 is sucked in by the electric suction cup 603, and the external air is transported to the inside of the air outlet pipe 1909 by the blower 1908, and sprayed to the outside through the air outlet 1912, so that the blown air can quickly separate the whole film rubber ring from the lower mold 3.

[0042] Embodiment 5, a process for forming a multi-layer composite seal, comprising the following steps: S1: 52 parts by weight of nitrile rubber, 19 parts by weight of fluororubber and 11 parts by weight of polytetrafluoroethylene are put into a mixer and mixed at a mixing temperature of 32° C. for 8 minutes; S2: During the stirring process, 5.5 parts by weight of plasticizer are added to the mixed basic composite material in sequence, and mixed for 8.5 minutes, followed by adding 1.4 parts by weight of vulcanizer, 0.9 parts by weight of accelerator and 0.42 parts by weight of antioxidant, and mixing is continued for 8 minutes, and then 0.39 parts by weight of colorant and 0.55 parts by weight of flame retardant are added, and mixed for another 4 minutes to prepare the raw materials of the multilayer composite seal, and finally the raw materials of the multilayer composite seal are transported to the extruder for stirring and plasticizing, and the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 by the extruder for compression molding; S3: After the multi-layer composite seal is molded to the whole film rubber ring, the mold is opened, and the movable plate 4 drives the upper mold 5 to move to the upper end. At this time, the whole film rubber ring is attached to the top surface of the lower mold 3. The frame 602 is driven to move above the lower mold 3 by the moving block 601. The piston rod of the first cylinder 622 drives the frame 602 to drive the guide rod 604 to move synchronously toward the lower mold 3. Multiple guide rods 604 slide along the moving block 601, so that multiple electric suction cups 603 are synchronously moved to a suitable use height, and the whole film rubber ring on the top surface of the lower mold 3 is adsorbed and demolded by the electric suction cup 603; S4: During the demoulding process, after the electric suction cup 603 is moved above the whole film rubber ring, the piston rod of the second cylinder 609 pushes the push block 608 to slide along the T-shaped block 607, driving the third cylinder 610 and the rubber round block 611 to move synchronously, and the rubber round block 611 presses the lifting block 605 in turn, so that the corresponding lifting block 605 and the electric suction cup 603 thereon move downward synchronously, and the lifting block 605 slides under the guide rod 604, and the first spring 606 is compressed by the lifting block 605, so that the moving electric suction cup 603 is attracted to the whole film rubber ring, and at this time, the piston rod of the third cylinder 610 drives the rubber round block 611 to return to the initial position, and the restoring force of the first spring 606 drives the lifting block 605 to return to the initial position, so that the electric suction cup 603 on the corresponding lifting block 605 drives the whole film rubber ring to move upward and demould from the lower mold 3; S5: After the demoulding is completed, the whole film rubber ring is driven by the piston rod of the fourth cylinder 619 to move the trapezoidal block 620, so that the trapezoidal block 620 drives the moving block 601 to slide along the positioning block 618, and the frame 602 and the whole film rubber ring are moved to one side of the positioning block 618. After moving to a suitable position, the output shaft of the first servo motor 616 drives the worm 615 to rotate along the support 617, so that the worm 615 is meshed and transmitted to the worm wheel 614, so that the rotating column 613 rotates along the bracket 612, and the positioning block 618 and the moving block 601 are driven to rotate synchronously. After the frame 602 and the whole film rubber ring are rotated to a suitable position, the electric suction cup 603 is separated from the whole film rubber ring to complete the demoulding operation; S6: Before injection molding, the upper mold 5 and the lower mold 3 of appropriate models and sizes are installed through the installation groove 7, and the lever 14 is pulled to make the shift block 10 slide along the slot 9 and the limit block 12. At this time, the second spring 13 is compressed, and the lower mold 3 is installed and replaced through the installation groove 7. After the replacement is completed, the lever 14 is released to make the shift block 10 return to the initial position, and the shift block 10 blocks and positions the lower mold 3; After positioning is completed, the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 through an external device. Before injecting the molten material, the mold cavity is evacuated through the suction pipe 18 of the vacuum pump 17, and the injection molding is performed after the vacuum is evacuated until the mold is formed; S7: While demoulding through the suction cup assembly 6, the output shaft of the second servo motor 1907 drives the rotating shaft 1906 to rotate, so that the gear 1905 meshes and transmits to the rack 1903, so that the slider 1902 slides along the fixed block 1901, and pushes the hollow block 1911 to move to the upper end of the lower mold 3. The hollow block 1911 drives the outer peripheral wall of one end of the air outlet pipe 1909 to slide along the stabilizing block 1910. At this time, the whole film rubber ring located below the hollow block 1911 is sucked in by the electric suction cup 603, and the external air is transported to the inside of the air outlet pipe 1909 by the blower 1908, and sprayed to the outside through the air outlet 1912, so that the blown air can quickly separate the whole film rubber ring from the lower mold 3.

[0043] Embodiment 6, a process for forming a multi-layer composite seal, comprising the following steps: S1: 60 parts by weight of nitrile rubber, 21 parts by weight of fluororubber and 13 parts by weight of polytetrafluoroethylene are put into a mixer and mixed at a mixing temperature of 40° C. for 10 minutes; S2: During the stirring process, 7 parts by weight of plasticizer are sequentially added to the mixed basic composite material, and mixed for 10 minutes, followed by adding 2.1 parts by weight of vulcanizer, 1.2 parts by weight of accelerator and 0.6 parts by weight of antioxidant, and mixing is continued for 10 minutes, and then 0.65 parts by weight of colorant and 0.72 parts by weight of flame retardant are added, and mixed for another 5 minutes to prepare the raw materials of the multi-layer composite seal, and finally the raw materials of the multi-layer composite seal are transported to the extruder for stirring and plasticizing, and the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 by the extruder for compression molding; S3: After the multi-layer composite seal is molded to the whole film rubber ring, the mold is opened, and the movable plate 4 drives the upper mold 5 to move to the upper end. At this time, the whole film rubber ring is attached to the top surface of the lower mold 3. The frame 602 is driven to move above the lower mold 3 by the moving block 601. The piston rod of the first cylinder 622 drives the frame 602 to drive the guide rod 604 to move synchronously toward the lower mold 3. Multiple guide rods 604 slide along the moving block 601, so that multiple electric suction cups 603 are synchronously moved to a suitable use height, and the whole film rubber ring on the top surface of the lower mold 3 is adsorbed and demolded by the electric suction cup 603; S4: During the demoulding process, after the electric suction cup 603 is moved above the whole film rubber ring, the piston rod of the second cylinder 609 pushes the push block 608 to slide along the T-shaped block 607, driving the third cylinder 610 and the rubber round block 611 to move synchronously, and the rubber round block 611 presses the lifting block 605 in turn, so that the corresponding lifting block 605 and the electric suction cup 603 thereon move downward synchronously, and the lifting block 605 slides under the guide rod 604, and the first spring 606 is compressed by the lifting block 605, so that the moving electric suction cup 603 is attracted to the whole film rubber ring, and at this time, the piston rod of the third cylinder 610 drives the rubber round block 611 to return to the initial position, and the restoring force of the first spring 606 drives the lifting block 605 to return to the initial position, so that the electric suction cup 603 on the corresponding lifting block 605 drives the whole film rubber ring to move upward and demould from the lower mold 3; S5: After the demoulding is completed, the whole film rubber ring is driven by the piston rod of the fourth cylinder 619 to move the trapezoidal block 620, so that the trapezoidal block 620 drives the moving block 601 to slide along the positioning block 618, and the frame 602 and the whole film rubber ring are moved to one side of the positioning block 618. After moving to a suitable position, the output shaft of the first servo motor 616 drives the worm 615 to rotate along the support 617, so that the worm 615 is meshed and transmitted to the worm wheel 614, so that the rotating column 613 rotates along the bracket 612, and the positioning block 618 and the moving block 601 are driven to rotate synchronously. After the frame 602 and the whole film rubber ring are rotated to a suitable position, the electric suction cup 603 is separated from the whole film rubber ring to complete the demoulding operation; S6: Before injection molding, the upper mold 5 and the lower mold 3 of appropriate models and sizes are installed through the installation groove 7, and the lever 14 is pulled to make the shift block 10 slide along the slot 9 and the limit block 12. At this time, the second spring 13 is compressed, and the lower mold 3 is installed and replaced through the installation groove 7. After the replacement is completed, the lever 14 is released to make the shift block 10 return to the initial position, and the shift block 10 blocks and positions the lower mold 3; After positioning is completed, the molten material is injected into the mold cavity between the lower mold 3 and the upper mold 5 through an external device. Before injecting the molten material, the mold cavity is evacuated through the suction pipe 18 of the vacuum pump 17, and the injection molding is performed after the vacuum is evacuated until the mold is formed; S7: While demoulding through the suction cup assembly 6, the output shaft of the second servo motor 1907 drives the rotating shaft 1906 to rotate, so that the gear 1905 meshes and transmits to the rack 1903, so that the slider 1902 slides along the fixed block 1901, and pushes the hollow block 1911 to move to the upper end of the lower mold 3. The hollow block 1911 drives the outer peripheral wall of one end of the air outlet pipe 1909 to slide along the stabilizing block 1910. At this time, the whole film rubber ring located below the hollow block 1911 is sucked by the electric suction cup 603, and the external air is transported to the inside of the air outlet pipe 1909 through the blower 1908, and sprayed to the outside through the air outlet hole 1912, so that the blown air quickly separates the whole film rubber ring from the lower mold 3; In Example 4, Example 5 and Example 6, the changes in the proportions of raw materials such as nitrile rubber, fluororubber, polytetrafluoroethylene and various additives meet the diverse requirements for the performance of multi-layer composite seals in different application scenarios; for example, increasing the proportions of nitrile rubber, fluororubber and polytetrafluoroethylene improves the oil resistance, high temperature resistance and chemical stability of the seal, so that it can adapt to the high temperature and oily environment of the automobile engine compartment, the complex and harsh working conditions of military equipment, and the special environment of submarines in the deep sea with high pressure, high humidity and certain chemical corrosion; adjusting the content of additives such as plasticizers, vulcanizers, accelerators, antioxidants, colorants and flame retardants to optimize the processing performance, crosslinking degree, service life, appearance color and fire resistance of the seal; During the production process, flexible adjustments are made according to actual production conditions and equipment performance, such as mixing temperature, mixing time, operating parameters of each step, and replacement and positioning of molds, to ensure that each step can reach the optimal state; this not only improves production efficiency and reduces material waste and equipment failures in the production process, but also ensures stable and reliable product quality, so that multi-layer composite seals can play their due sealing role in different industrial fields and meet the sealing requirements from general industrial environments to high temperature, high pressure, strong corrosion and other harsh working conditions, thereby improving the reliability and economic benefits of the entire production system.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-layer composite seal molding device, comprising a fixed mold platform (1) and a movable mold platform (2), characterized in that: The fixed mold platform (1) is provided with a lower mold (3), the movable mold platform (2) is provided with a movable plate (4), an upper mold (5) is mounted on the movable plate (4), a suction cup assembly (6) is mounted on the fixed mold platform (1), a moving block (601) is mounted on the suction cup assembly (6), a frame (602) is provided at the lower end of one side of the moving block (601), a plurality of electric suction cups (603) are mounted on the frame (602), the outer peripheral wall of the upper end of the electric suction cup (603) is slidably connected to the frame (602), and the moving block ( A first cylinder (622) is installed on the top surface of the frame (601) through a mounting seat, the bottom surface of the piston rod of the first cylinder (622) passes through the moving block (601) and is fixedly connected to the middle top surface of the frame (602), a plurality of guide rods (604) are fixedly arranged on the top surface of the frame (602), the upper peripheral walls of the plurality of guide rods (604) are respectively slidably connected to the moving block (601), the lower ends of the guide rods (604) are respectively slidably connected to lifting blocks (605), and the lifting blocks (605) are respectively fixedly connected to the upper peripheral walls of the electric suction cup (603).

2. The multi-layer composite seal molding device according to claim 1, characterized in that: A first spring (606) is sleeved on the outer peripheral wall of the electric suction cup (603), and two ends of the first spring (606) are respectively in contact with the lifting block (605) and the frame (602). A T-shaped block (607) is fixedly provided on the side wall of the moving block (601), and a push block (608) is slidably connected to the T-shaped block (607). A second cylinder (609) is installed on the moving block (601) via a mounting seat, and a piston rod of the second cylinder (609) is fixedly connected to the side wall of the push block (608). A third cylinder (610) is installed on the top surface of the push block (608) via a mounting seat, and a rubber round block (611) is fixedly provided on the bottom surface of the piston rod of the third cylinder (610).

3. The multi-layer composite seal molding device according to claim 2, characterized in that: A bracket (612) is fixedly provided on the fixed mold platform (1), a rotating column (613) is rotatably connected to the bracket (612), a worm wheel (614) is mounted on the outer peripheral wall of the lower end of the rotating column (613) via a mounting seat, a worm (615) is meshingly connected to the worm wheel (614), a first servo motor (616) is mounted on the side wall of the bracket (612) via a mounting seat, an output shaft of the first servo motor (616) is coaxially connected to the worm (615), one end of the worm (615) is rotatably connected to a support (617), and a bottom surface of the support (617) is fixedly connected to a top surface of the bracket (612).

4. The multi-layer composite seal molding device according to claim 3, characterized in that: A positioning block (618) is fixedly provided on the top surface of the rotating column (613); the moving block (601) is slidably connected to the positioning block (618); a fourth cylinder (619) is mounted on the top surface of the positioning block (618) via a front mounting seat; a trapezoidal block (620) is fixedly provided on the top surface of the moving block (601); a piston rod of the fourth cylinder (619) is fixedly connected to the trapezoidal block (620); and a plurality of counterweight blocks (621) are mounted on a side of the moving block (601) away from the first cylinder (622).

5. The multi-layer composite seal molding device according to claim 4, characterized in that: The side wall of the fixed mold platform (1) is provided with a mounting groove (7), the lower mold (3) is plugged and matched with the fixed mold platform (1) through the mounting groove (7), the lower mold (3) is connected with an injection tube (8), the side wall of the fixed mold platform (1) is provided with a slot (9), a shift block (10) is plugged inside the slot (9), a through slot (11) is provided in the middle of the shift block (10), a limit block (12) is slidably connected inside the through slot (11), the limit block (12) is fixedly connected to the fixed mold platform (1), a second spring (13) is fixedly provided in the middle of the limit block (12), the second spring (13) is located inside the through slot (11), one end of the second spring (13) is fixedly connected to the shift block (10), and two shift rods (14) are fixedly provided on the shift block (10) in a symmetrical structure.

6. The multi-layer composite seal molding device according to claim 5, characterized in that: A hydraulic cylinder (15) is installed in the middle of the top surface of the movable mold platform (2) through a mounting seat, the bottom surface of the piston rod of the hydraulic cylinder (15) is fixedly connected to the top surface of the movable plate (4), sliding rods (16) are fixedly provided at the four corners of the top surface of the movable plate (4), and the outer peripheral walls of a plurality of sliding rods (16) are respectively slidably connected to the movable mold platform (2), and a vacuum pump (17) is installed on the top surface of the movable mold platform (2) through a mounting seat, and a suction pipe (18) is provided on the vacuum pump (17), and the suction pipe (18) is a spring pipe, and the lower end of the suction pipe (18) passes through the upper mold (5) and is connected to the mold cavity.

7. The multi-layer composite seal molding device according to claim 6, characterized in that: The demoulding assembly (19) is also included. The demoulding assembly (19) is provided with a fixed block (1901), the fixed block (1901) is fixedly mounted on the outer wall of the fixed mold platform (1), a slider (1902) is slidably connected to the fixed block (1901), a rack (1903) is installed at the concave portion of the top surface of the slider (1902), and two connecting blocks (1904) are fixedly mounted on the upper side wall of the fixed block (1901), and a connecting rod (1903) is provided between the two connecting blocks (1904). A gear (1905) is provided, the gear (1905) being meshedly connected with a rack (1903), a rotating shaft (1906) being fixedly arranged in the middle of the gear (1905), the outer peripheral walls at both ends of the rotating shaft (1906) being rotatably connected with two connecting blocks (1904) respectively, a second servo motor (1907) being installed on the side wall of the fixed block (1901) via a mounting seat, and an output shaft of the second servo motor (1907) being coaxially connected with the rotating shaft (1906).

8. The multi-layer composite seal molding device according to claim 7, characterized in that: A blower (1908) is mounted on the outer wall of the lower end of the fixed block (1901) via a mounting seat; the output end of the blower (1908) is connected to an air outlet pipe (1909); the middle portion of the air outlet pipe (1909) is a spring tube; the outer peripheral wall of the air outlet pipe (1909) is slidably connected to a stabilizing block (1910); and the stabilizing block (1910) is fixedly connected to the upper end of the fixed block (1901).

9. The multi-layer composite seal molding device according to claim 8, characterized in that: A hollow block (1911) is fixedly disposed at one end of the sliding block (1902); a plurality of air outlet holes (1912) are provided on the inclined surface of the hollow block (1911); and one end of the air outlet pipe (1909) is connected to the hollow block (1911).

10. A process for a multi-layer composite seal molding device, characterized in that: The multi-layer composite seal molding device according to claim 9 comprises the following steps: S1: 48 to 60 parts by weight of nitrile rubber, 16 to 21 parts by weight of fluororubber and 8 to 13 parts by weight of polytetrafluoroethylene are put into a mixer and mixed at a mixing temperature of 25° C. to 40° C. for 5 to 10 minutes; S2: During the stirring process, 3 to 7 parts by weight of a plasticizer are sequentially added to the mixed basic composite material, and the mixture is mixed for 10 minutes. Then, 0.8 to 2.1 parts by weight of a vulcanizer, 0.4 to 1.2 parts by weight of an accelerator, and 0.15 to 0.6 parts by weight of an antioxidant are added, and the mixture is mixed for 10 minutes. Then, 0.16 to 0.65 parts by weight of a colorant and 0.25 to 0.72 parts by weight of a flame retardant are added, and the mixture is mixed for another 5 minutes to prepare a raw material for a multi-layer composite seal. Finally, the raw material for the multi-layer composite seal is transported to an extruder for stirring and plasticizing, and the molten material is injected into the mold cavity between the lower mold (3) and the upper mold (5) by the extruder for compression molding. S3: After the multi-layer composite seal is molded to the entire film rubber ring, the mold is opened, and the movable plate (4) drives the upper mold (5) to move to the upper end. At this time, the entire film rubber ring is attached to the top surface of the lower mold (3). The frame (602) is driven to move to the top of the lower mold (3) by the moving block (601). The piston rod of the first cylinder (622) drives the frame (602) to drive the guide rod (604) to move synchronously in the direction of the lower mold (3). Multiple guide rods (604) slide along the moving block (1), so that multiple electric suction cups (603) are synchronously moved to a suitable use height, and then the entire film rubber ring on the top surface of the lower mold (3) is adsorbed and demolded by the electric suction cup (603); S4: During the demoulding process, after the electric suction cup (603) is moved to the top of the whole film rubber ring, the piston rod of the second cylinder (609) pushes the push block (608) to slide along the T-shaped block (607), driving the third cylinder (610) and the rubber round block (611) to move synchronously, and the rubber round block (611) presses the lifting block (605) in turn, so that the corresponding lifting block (605) and the electric suction cup (603) thereon move downward synchronously, and the lifting block (605) moves along the guide The rod (604) slides downward, and the first spring (606) is compressed by the lifting block (605), so that the moving electric suction cup (603) is attracted to the whole film rubber ring. At this time, the piston rod of the third cylinder (610) drives the rubber round block (611) to return to the initial position. The restoring force of the first spring (606) pushes the lifting block (605) to return to the initial position, so that the electric suction cup (603) on the corresponding lifting block (605) drives the whole film rubber ring to move upward and demould from the lower mold (3); S5: After the demoulding is completed, the whole film rubber ring is driven by the piston rod of the fourth cylinder (619) to move the trapezoidal block (620), so that the trapezoidal block (620) drives the moving block (601) to slide along the positioning block (618), and the frame (602) and the whole film rubber ring are moved to one side of the positioning block (618). After moving to a suitable position, the output shaft of the first servo motor (616) drives the worm (615) to rotate along the support (617), so that the worm (615) is meshed and transmitted to the worm wheel (614), so that the rotating column (613) rotates along the bracket (612), driving the positioning block (618) and the moving block (601) to rotate synchronously, and after the frame (602) and the whole film rubber ring are rotated to a suitable position, the electric suction cup (603) is separated from the whole film rubber ring, and the demoulding operation is completed; S6: Before injection molding, an upper mold (5) and a lower mold (3) of suitable model and size are installed through the installation groove (7), and the lever (14) is pulled to make the shift block (10) slide along the slot (9) and the limit block (12). At this time, the second spring (13) is compressed, and the lower mold (3) is installed and replaced through the installation groove (7). After the replacement is completed, the lever (14) is released to make the shift block (10) return to the initial position, and the shift block (10) blocks and positions the lower mold (3); After positioning is completed, the molten material is injected into the mold cavity between the lower mold (3) and the upper mold (5) through an external device. Before injecting the molten material, the mold cavity is evacuated through a suction pipe (18) of a vacuum pump (17). After the vacuum is evacuated, the mold is closed for injection molding until the molding is completed; S7: While demoulding through the suction cup assembly (6), the output shaft of the second servo motor (1907) drives the rotating shaft (1906) to rotate, so that the gear (1905) meshes and transmits to the rack (1903), so that the slider (1902) slides along the fixed block (1901), pushing the hollow block (1911) to move to the upper end of the lower mold (3), and the hollow block (1911) drives the outer peripheral wall of one end of the air outlet pipe (1909) to slide along the stabilizing block (1910). At this time, the whole film rubber ring located below the hollow block (1911) is sucked in by the electric suction cup (603), and the external air is transported to the inside of the air outlet pipe (1909) by the blower (1908), and sprayed to the outside through the air outlet hole (1912), so that the blown air quickly separates the whole film rubber ring from the lower mold (3).

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