Automatic demolding device of silica gel injection molding machine

Abstract

The invention discloses an automatic demolding device of a silica gel injection molding machine, and relates to the technical field of silica gel product production. The injection molding device comprises a mounting base, an outer mold is fixed to the bottom of the mounting base, an injection molding assembly is arranged outside the outer mold, the injection molding assembly comprises two sliding groove plates fixed to the two sides of the bottom of the mounting base, a sliding column is fixed to the interior of one sliding groove plate, and a supporting arm is slidably mounted outside the sliding column. Through the arrangement of the auxiliary device, the attaching plate and the outer wall of the inner mold are staggered, so that the attaching plate is separated from the inner wall of the formed silica gel basin, the contact area of the inner mold and the inner wall of the silica gel basin is reduced, and the reduction of the contact area is beneficial to reducing the adhesion or adsorption force between the inner mold and the inner wall of the silica gel basin; therefore, the phenomenon of strong adsorption or adhesion between the silica gel basin and the inner mold in the forming process is avoided, and the phenomenon that the formed silica gel basin is damaged or is difficult to be separated from the mold smoothly during demolding is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of silicone product production, and particularly to an automatic demoulding device for a silicone injection molding machine. Background Technique

[0002] A silicone injection molding machine is a device used for producing silicone products. It adopts an injection molding process to inject liquid silicone into a mold and forms the final product through heating and curing. This device is widely used in fields such as electronics and automotive, and particularly plays an important role in the manufacturing of electrical products. As an excellent insulating material, silicone is often used to manufacture components such as seals, gaskets, and connectors for electronic components, and has good electrical insulation and high temperature resistance, which can improve the safety and stability of electrical products. After the injection molding of silicone products is completed, demoulding operations need to be carried out on the formed silicone products.

[0003] Chinese Patent with the patent announcement number CN218700993U discloses a demoulding device for silicone products, including a housing. The upper surface of the housing is provided with a mold groove. An installation cavity is opened inside the housing. A double-headed motor is fixedly connected inside the installation cavity. The output shaft of the double-headed motor is fixedly connected with a threaded rod. A threaded block is threadedly connected to the outer surface of the threaded rod. The upper end of the threaded block is fixedly connected with a first mounting seat. A connecting rod is rotatably connected inside the first mounting seat. One end of the connecting rod is rotatably connected with a second mounting seat. The upper end of the second mounting seat is fixedly connected with a lifting plate. A plurality of ejector pins are fixedly connected to the upper end of the lifting plate. The upper end of the ejector pin is fixedly connected with an ejecting plate. By setting the double-headed motor, threaded rod, threaded block, first mounting seat, second mounting seat, and connecting rod, the lifting plate is driven to rise, and then the ejector pins and the ejecting plate are driven to rise to eject the silicone product, eliminating the need for manual removal and improving production efficiency.

[0004] However, the current demoulding device has the following problems: When demoulding a silicone basin, due to the large contact area between the silicone basin and the mold, a large contact area easily leads to an increase in the frictional force between the silicone basin and the mold, making demoulding difficult. This will increase the force required for demoulding and may even damage the silicone basin. Therefore, we propose an automatic demoulding device for a silicone injection molding machine. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an automatic demoulding device for a silicone injection molding machine, which solves the problems raised in the above background technique.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An automatic demoulding device for a silicone injection molding machine, including a mounting base, an outer mold is fixed at the bottom of the mounting base, an injection molding assembly is arranged outside the outer mold, the injection molding assembly includes two chute plates fixed on both sides of the bottom of the mounting base, a sliding column is fixed inside one of the chute plates, a support arm is slidably mounted outside the sliding column, a first screw is rotatably mounted inside the other chute plate, and the first screw is driven by a servo motor, a nut sleeve is threadedly connected to the outside of the first screw, the nut sleeve is fixedly connected with the other support arm, a cover plate is fixed between the bottoms of the two support arms, an injection pipe is fixed at the bottom of the cover plate, a driving motor is fixed on the top of the mounting base, an auxiliary device is arranged inside the outer mold, the auxiliary device includes a second screw, two L-shaped limit plates, the second screw is fixed at the bottom of the output end of the driving motor, a connecting plate is threadedly connected to the outside of the second screw, an inner mold is fixedly connected to the outside of the connecting plate, a plurality of long grooves are evenly formed in the outer circumference of the inner mold, a fitting plate is slidably mounted inside each of the plurality of long grooves of the inner mold, elastic telescopic columns are fixed on both sides of the bottom of the connecting plate, a moving ring is fixed at the telescopic end of the elastic telescopic column, the outer wall of the moving ring is hingedly connected to the outer wall of the fitting plate through a first hinge rod, elastic plates are fixed on both sides of the inner wall of the moving ring, the two L-shaped limit plates are both fixed at the bottom of the mounting base, the two L-shaped limit plates are respectively located on both sides of the second screw, through holes for the L-shaped limit plates to slide are formed on both sides of the top of the connecting plate, a resisting plate is fixed on the side of each of the two L-shaped limit plates away from each other, the resisting plate is located on the movement track of the elastic plate, and a distance of two centimeters is left between the resisting plate and the inner wall of the moving ring. The driving motor drives the second screw to rotate, the second screw drives the connecting plate to move downward along the outside of the L-shaped limit plate, the connecting plate drives the inner mold to move downward, so that the inner mold pushes the silicone basin out of the outer mold, and the inner mold will drive the first hinge rod and the moving ring to move downward through the fitting plate. When the moving ring moves, it will also drive the elastic plate to move downward. When the elastic plate moves to the position of the resisting plate, the resisting plate will push against the bottom of the elastic plate to drive the elastic plate to deform upward. During this process, the elastic plate drives the moving ring to displace, the moving ring squeezes the telescopic end of the elastic telescopic column, and the moving ring pulls the first hinge rod to drive the fitting plate to move inward along the long groove of the inner mold in the direction of the center of the inner mold, and the fitting plate is misaligned with the outer wall of the inner mold.

[0007] According to the above technical scheme, a U-shaped knocking plate is fixed on one side of the bonding plate close to the center of the inner mold, and one end of the U-shaped knocking plate away from the bonding plate contacts the inner wall of the inner mold. When the moving ring pulls the hinged rod to drive the bonding plate to move along the long groove of the inner mold toward the center of the inner mold, the bonding plate drives the U-shaped knocking plate away from the inner wall of the inner mold. When the spring plate passes over the contact plate, the spring plate is no longer subjected to force. Under the elastic force of the elastic telescopic column, the elastic telescopic column drives the moving ring to reset, and the moving ring pushes the hinged rod to drive the bonding plate to reset, and the bonding plate overlaps with the outer wall of the inner mold again, and the bonding plate will drive the U-shaped knocking plate to reset and move, and the U-shaped knocking plate hits the inner wall of the inner mold.

[0008] According to the above technical solution, a push rod is fixed at the lower outer wall of the bonding plate close to the center of the inner mold, and a hinged rod 2 is hinged on the side of the push rod away from the bonding plate. A push rod is hinged on the end of the hinged rod 2 away from the push rod, and the push rod passes through and is slidably installed on the bottom of the inner wall of the inner mold. The push rod is set in an "L-shape". When the moving ring pulls the hinged rod 1 to drive the bonding plate to move along the long groove of the inner mold toward the center of the inner mold, the bonding plate drives the push rod to move with it, and the push rod pushes the hinged rod 2 to drive the push rod to move downward, so that the push rod can exert additional demolding force.

[0009] According to the above technical solution, a cooling device is provided at the inner mold, and the cooling device includes a fan, a groove disk, and a sleeve. The fan is fixed at the top of the mounting base, and the air outlet of the fan is connected to the top of the mounting base by an L-shaped tube. The L-shaped tube is used to introduce the airflow generated by the fan into the interior of the inner mold. The groove disk is fixed at the upper inner wall of the inner mold, and the bottom of the groove disk is connected to the upper outer wall of the bonding plate by a connecting tube. The bonding plate is a hollow structure, and an exhaust port is provided at the lower outer wall of the bonding plate. The sleeve is fixed at the top of the mounting base, and the top of the inner wall of the sleeve is connected to the top of the groove disk by a Z-shaped tube. The connecting tube and the Z-shaped tube are both retractable corrugated tubes. When the silicone basin is in the cooling and molding process During the process, the fan is started, and the fan blows air toward the inside of the inner mold through the L-shaped tube. The generated wind flow will be transmitted to the connecting tube through the groove plate, and the connecting tube will transport the wind flow to the inside of the bonding plate, and then the air flow will be discharged through the exhaust port of the bonding plate. The air flow discharged from the bonding plate will finally be discharged from the inner mold through the Z-shaped tube. The air flow passes through the bonding plate and takes away the heat. At the same time, each time the moving ring pulls the hinged rod to drive the bonding plate to move toward the center of the inner mold, the operation process of the bonding plate and the outer wall of the inner mold being misaligned and the push rod moving downward is carried out synchronously. At this time, the bonding plate no longer blocks the long groove of the inner mold, and the push rod no longer blocks the through groove between the push rod and the inner mold. At this time, part of the air flow discharged from the exhaust port of the bonding plate will be discharged through the long groove of the inner mold and the through groove between the push rod and the inner mold.

[0010] According to the above technical solution, the cooling device further includes a heating device and a spiral heating tube. The heating device is fixed on the top of the installation base, and the spiral heating tube is fixed outside the heating device and is located inside the sleeve. Before injecting the liquid silicone into the space between the outer mold and the inner mold through the injection tube, the heating device is started. The heating device heats the spiral heating tube, and the spiral heating tube heats the air inside the sleeve. At this time, the rotation direction of the fan is started and switched, and the fan extracts the air inside the inner mold and discharges it outward. During this process, the external air will enter the inner mold through the Z-shaped tube. When the external air passes through the Z-shaped tube, the spiral heating tube will heat the air entering the inner mold through the Z-shaped tube. Then, the hot air enters the bonding plate through the exhaust port of the bonding plate, and the bonding plate conveys the hot air in the enclosed space to between the L-shaped tube and the groove plate through the connecting pipe, and the bonding plate preheats the outer wall of the inner mold.

[0011] The present invention provides an automatic demolding device for a silicone injection molding machine, which has the following beneficial effects: (1) Through the setting of the auxiliary device in the present invention, the driving motor, the second screw rod, the connecting plate, the L-shaped limiting plate, the inner mold, the outer mold, the first articulated rod, the moving ring, the elastic plate, and the abutting plate cooperate to drive the bonding plate to be misaligned with the outer wall of the inner mold, so that the bonding plate is separated from the inner wall of the formed silicone basin, thereby reducing the contact area between the inner mold and the inner wall of the silicone basin. Reducing the contact area helps to reduce the adhesion or adsorption force between the inner mold and the inner wall of the silicone basin, thus avoiding the strong adsorption or adhesion phenomenon between the silicone basin and the inner mold during the molding process, which helps to avoid damage to the formed silicone basin during demolding or difficulty in smoothly separating from the mold; at the same time, the moving ring, the first articulated rod, the bonding plate, the inner mold, the abutting plate, and the elastic plate cooperate to drive the U-shaped knocking plate to impact the inner wall of the inner mold, so that the inner mold vibrates, which helps to reduce the adhesion force between the silicone basin and the inner mold. This vibration can help loosen the connection between the silicone basin and the inner mold. Especially when the silicone material has a certain adhesion or deformation, the vibration helps to break the physical contact between the silicone and the inner mold and reduce the adhesion force, making it easier to achieve separation.

[0012] (2) In the present invention, the moving ring, the first articulated rod, the bonding plate, the inner mold, the push rod, and the second articulated rod cooperate to drive the ejector rod to move downward, so that the ejector rod can apply an additional demolding force. Because the silicone material usually adheres tightly to the inner wall of the mold after cooling, by pushing the ejector rod downward, the adhesion force between the silicone basin and the mold can be effectively reduced, thus achieving smooth demolding. An automatic demolding process can be realized, reducing manual intervention and making the demolding of the silicone basin more stable and reliable.

[0013] (3) Through the setting of the cooling device, during the cooling and forming process of the silicone basin, the fan, L-shaped pipe, inner mold, groove plate, and connecting pipe cooperate to drive the air flow to be transported into the inside of the fitting plate, and then the air flow is discharged through the exhaust port of the fitting plate. The air flow passes through the fitting plate and takes away heat, which helps to accelerate the cooling process of the silicone basin, thereby reducing the cooling time of the silicone basin. Especially during large-scale production, rapid cooling can significantly shorten the time of each cycle, improve the output. At the same time, during the movement of the fitting plate towards the center of the inner mold, the fitting plate no longer blocks the long groove of the inner mold, and the ejector rod no longer blocks the through groove between the ejector rod and the inner mold. At this time, part of the air flow discharged from the exhaust port of the fitting plate will be discharged through the long groove of the inner mold and the through groove between the ejector rod and the inner mold. This air flow discharge helps the separation between the silicone basin and the inner mold, further reducing the adhesion phenomenon during the demolding process and ensuring that the silicone basin can be smoothly separated from the mold. At the same time, the heating device, spiral heating pipe, sleeve, fan, and Z-shaped pipe cooperate to drive the fitting plate to preheat the outer wall of the inner mold. The liquid silicone will contact the relatively warm surface of the inner mold after being injected, which helps to improve the fluidity of the silicone. When the temperature of the inner mold is close to or slightly higher than the curing temperature of the silicone, the liquid silicone can evenly fill the mold surface, ensuring that every detail of the mold is well formed. At the same time, preheating can also reduce the too fast cooling rate when the silicone contacts the cold mold, avoiding uneven cooling or surface defects. Description of the Drawings

[0014] Figure 1 Schematic diagram of the whole of the present invention Figure 1 ; Figure 2 Schematic diagram of the whole of the present invention Figure 2 ; Figure 3 Schematic diagram of the partial cross-section of the present invention; Figure 4 Schematic diagram of the injection molding assembly of the present invention; Figure 5 Schematic diagram of the auxiliary device of the present invention; Figure 6 Of the present invention Figure 5 Enlarged schematic diagram of the structure at A; Figure 7 Of the present invention Figure 5 Enlarged schematic diagram of the structure at B; Figure 8 Schematic diagram of the partial structure of the auxiliary device of the present invention Figure 1 ; Figure 9 Schematic diagram of the partial structure of the auxiliary device of the present invention Figure 2 ; Figure 10 Schematic diagram at the inner mold of the present invention Figure 1 ; Figure 11 Schematic diagram of the inner mold in the present invention Figure 2 ; Figure 12 Schematic diagram of the cooling device of the present invention Figure 1 ; Figure 13 Schematic diagram of the cooling device of the present invention Figure 2 .

[0015] In the figure: 1. Installation base; 2. Injection molding assembly; 21. Slide groove plate; 22. Slide column; 23. Screw one; 24. Support arm; 25. Cover plate; 26. Injection molding pipe; 3. Outer mold; 4. Inner mold; 5. Driving motor; 6. Auxiliary device; 61. Screw two; 62. Connecting plate; 63. Moving ring; 64. Hinge rod one; 65. Fitting plate; 66. L-shaped limiting plate; 67. Contact plate; 68. Elastic plate; 69. U-shaped knocking plate; 610. Elastic telescopic column; 611. Push rod; 612. Hinge rod two; 613. Jacking rod; 7. Cooling device; 71. Fan; 72. L-shaped pipe; 73. Groove plate; 74. Sleeve; 75. Z-shaped pipe; 76. Connecting pipe; 77. Heating device; 78. Spiral heating pipe. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0017] Please refer to Figures 1 - 13, an embodiment of the present invention is: an automatic demoulding device for a silicone injection molding machine, including a mounting base 1. The bottom of the mounting base 1 is fixed with an outer mold 3. An injection molding assembly 2 is arranged outside the outer mold 3. The injection molding assembly 2 includes two chute plates 21 fixed on both sides of the bottom of the mounting base 1. A sliding column 22 is fixed inside one chute plate 21. An outer support arm 24 is slidably mounted outside the sliding column 22. A first screw 23 is rotatably mounted inside the other chute plate 21, and the first screw 23 is driven by a servo motor. The outer support arm 24 is threadedly connected to the first screw 23. A cover plate 25 is fixed between the bottoms of the two support arms 24. An injection tube 26 is fixed to the bottom of the cover plate 25. A driving motor 5 is fixed on the top of the mounting base 1. An auxiliary device 6 is arranged inside the outer mold 3. The auxiliary device 6 includes a second screw 61 and two L-shaped limit plates 66. The second screw 61 is fixed to the bottom of the output end of the driving motor 5. A connecting plate 62 is threadedly connected to the second screw 61. An inner mold 4 is fixed to the outside of the connecting plate 62. A plurality of long grooves are evenly formed on the outer circumference of the inner mold 4. A fitting plate 65 is slidably mounted inside each of the plurality of long grooves of the inner mold 4. Elastic telescopic columns 610 are fixed to both sides of the bottom of the connecting plate 62. The bottom of the telescopic end of the elastic telescopic column 610 is fixed with a moving ring 63. The outer wall of the moving ring 63 is hingedly connected to the outer wall of the fitting plate 65 through a first hinge rod 64. Elastic plates 68 are fixed to both sides of the inner wall of the moving ring 63. Both L-shaped limit plates 66 are fixed to the bottom of the mounting base 1. The two L-shaped limit plates 66 are respectively located on both sides of the second screw 61. Through holes for the L-shaped limit plates 66 to slide are formed on both sides of the top of the connecting plate 62. A contact plate 67 is fixed to the side of each of the two L-shaped limit plates 66 away from each other. The contact plate 67 is located on the movement track of the elastic plate 68. A distance of two centimeters is left between the contact plate 67 and the inner wall of the moving ring 63. Through the setting of the above structure, the fitting plate 65 is misaligned with the outer wall of the inner mold 4, so that the fitting plate 65 is separated from the inner wall of the formed silicone basin, thereby reducing the contact area between the inner mold 4 and the inner wall of the silicone basin. Reducing the contact area helps to reduce the adhesion or adsorption force between the inner mold 4 and the inner wall of the silicone basin, thereby avoiding the strong adsorption or adhesion phenomenon between the silicone basin and the inner mold 4 during the molding process. This helps to avoid damage to the formed silicone basin during demoulding or difficulty in smoothly separating from the mold.

[0018] The fitting plate 65 (such as Figure 8On one side close to the center of the inner mold 4 (as shown), a U-shaped knocking plate 69 is fixed. One end of the U-shaped knocking plate 69 away from the fitting plate 65 is in contact with the inner wall of the inner mold 4. Through the setting of the above structure, when the fitting plate 65 resets, it drives the U-shaped knocking plate 69 to impact the inner wall of the inner mold 4, so that the inner mold 4 vibrates, which helps to reduce the adhesion force between the silicone basin and the inner mold 4. This vibration can help loosen the connection between the silicone basin and the inner mold 4. Especially when the silicone material has a certain adhesiveness or deformation, the vibration helps to break the physical contact between the silicone and the inner mold 4, reduce the adhesion force, and thus make the separation easier to achieve.

[0019] A push rod 611 is fixed at the outer wall below one side of the fitting plate 65 close to the center of the inner mold 4. One side of the push rod 611 away from the fitting plate 65 is hinged with a second articulated rod 612. One end of the second articulated rod 612 away from the push rod 611 is hinged with a ejector rod 613. The ejector rod 613 penetrates and is slidably installed at the bottom of the inner wall of the inner mold 4. The ejector rod 613 is arranged in an "L" shape. During the process of the moving ring 63 pulling the first articulated rod 64 to drive the fitting plate 65 to move along the long groove of the inner mold 4 towards the center of the inner mold 4, through the setting of the above structure, the push rod 611 is made to push the second articulated rod 612 to drive the ejector rod 613 to move downward, so that the ejector rod 613 can apply an additional demolding force. Because the silicone material usually adheres tightly to the inner wall of the mold after cooling, by pushing the ejector rod 613 downward, it can effectively help reduce the adhesion force between the silicone basin and the mold, thus achieving smooth demolding, realizing an automated demolding process, reducing manual intervention, and making the demolding of the silicone basin more stable and reliable.

[0020] When in use, liquid silicone is injected into between the outer mold 3 and the inner mold 4 through the injection tube 26. After the liquid silicone is cooled and solidified, the screw rod 23 is driven to rotate by the servo motor. The screw rod 23 drives the support arm 24 to move along the inside of the slide plate 21. The support arm 24 moves with the cover plate 25, so that the cover plate 25 does not cover the lower position of the outer mold 3. Then the drive motor 5 is started, and the drive motor 5 drives the screw rod 2 61 to rotate. The screw rod 2 61 drives the connecting plate 62 to move downward along the outside of the L-shaped limit plate 66. The connecting plate 62 drives the inner mold 4 to move downward, so that the inner mold 4 pushes the silicone basin out of the outer mold 3, and the inner mold 4 will drive the fitting plate 65, the hinge rod 1 64 and the moving ring 63 to move downward. When the moving ring 63 moves, it will also drive the spring plate 68 to move downward. When the spring plate 68 moves to the position of the contact plate 67, the moving ring 63 continues to descend. Due to the obstruction of the contact plate 67, the contact plate 67 will press against the bottom of the spring plate 68 with The movable spring plate 68 is deformed upward, that is, the spring plate 68 brings the moving ring 63 to squeeze the telescopic end of the elastic telescopic column 610, and the elastic telescopic column 610 is compressed. In this process, the spring plate 68 drives the moving ring 63 to move, and the moving ring 63 pulls the hinge rod 64 to drive the bonding plate 65 to move along the long groove of the inner mold 4 toward the center of the inner mold 4. The bonding plate 65 is misaligned with the outer wall of the inner mold 4, so that the bonding plate 65 is separated from the inner wall of the molded silicone basin, thereby reducing the contact area between the inner mold 4 and the inner wall of the silicone basin. Reducing the contact area helps to reduce the adhesion or adsorption force between the inner mold 4 and the inner wall of the silicone basin, thereby avoiding the strong adsorption or adhesion of the silicone basin to the inner mold 4 during the molding process. This helps to avoid the molded silicone basin from being damaged or difficult to smoothly detach from the mold during demolding. It should be noted that since the L-shaped limit plate 66 is fixed to the bottom of the mounting base 1, the position of the resistance plate 67 here is also fixed.

[0021] When the movable ring 63 pulls the hinged rod 1 64 to drive the bonding plate 65 to move along the long groove of the inner mold 4 toward the center of the inner mold 4, the bonding plate 65 drives the U-shaped knocking plate 69 away from the inner wall of the inner mold 4. When the spring plate 68 passes the contact plate 67, the spring plate 68 is no longer subjected to force. Under the elastic force of the elastic telescopic column 610, the elastic telescopic column 610 drives the movable ring 63 to reset. The movable ring 63 pushes the hinged rod 1 64 to drive the bonding plate 65 to reset. The bonding plate 65 overlaps with the outer wall of the inner mold 4 again, and the bonding plate 65 drives the U-shaped knocking plate 69 to reset and move. The U-shaped knocking plate 69 hits the inner wall of the inner mold 4, thereby causing the inner mold 4 to vibrate, which helps to reduce the adhesion between the silicone basin and the inner mold 4. This vibration can help loosen the connection between the silicone basin and the inner mold 4, especially when the silicone material has a certain adhesion or deformation, the vibration helps to break the physical contact between the silicone and the inner mold 4, reduce the adhesion, and thus make it easier to separate.

[0022] During the process that the moving ring 63 pulls the hinge rod 1 64 to drive the fitting plate 65 to move along the long groove of the inner mold 4 towards the center of the inner mold 4, the fitting plate 65 drives the push rod 611 to move accordingly. The push rod 611 pushes the hinge rod 2 612 to drive the ejector rod 613 to move downward, so that the ejector rod 613 can apply an additional demolding force. Since the silicone material usually adheres tightly to the inner wall of the mold after cooling, by pushing the ejector rod 613 downward, it can effectively help reduce the adhesion force between the silicone basin and the mold, thus realizing smooth demolding, enabling an automated demolding process, reducing manual intervention, and making the demolding of the silicone basin more stable and reliable.

[0023] Please refer to Figures 1 - 13 , on the basis of the above embodiment, in another embodiment of the present invention, a cooling device 7 is provided at the inner mold 4. The cooling device 7 includes a blower 71, a groove plate 73, and a sleeve 74. The blower 71 is fixed on the top of the mounting base 1. The air outlet of the blower 71 is connected to the top of the mounting base 1 through an L-shaped pipe 72. The L-shaped pipe 72 is used to introduce the air flow generated by the blower 71 into the interior of the inner mold 4. The groove plate 73 is fixed at the upper inner wall of the inner mold 4. The bottom of the groove plate 73 is connected to the upper outer wall of the fitting plate 65 through a connecting pipe 76. The fitting plate 65 is provided with a hollow structure, and an exhaust port is provided at the lower outer wall of the fitting plate 65. The sleeve 74 is fixed on the top of the mounting base 1. The top of the inner wall of the sleeve 74 is connected to the top of the groove plate 73 through a Z-shaped pipe 75. Both the connecting pipe 76 and the Z-shaped pipe 75 are made of telescopic corrugated pipes. During the process of the silicone basin cooling and forming, through the setting of the above structure, the air flow passes through the fitting plate 65 and takes away heat, which helps to accelerate the cooling process of the silicone basin, thereby reducing the cooling time of the silicone basin. Especially in large-scale production, rapid cooling can significantly shorten the time of each cycle and increase the output. At the same time, through the setting of the above structure, part of the air flow discharged from the exhaust port of the fitting plate 65 will be discharged through the long groove of the inner mold 4 and the through groove between the ejector rod 613 and the inner mold 4. This air flow discharge helps the separation between the silicone basin and the inner mold 4, further reducing the adhesion phenomenon during the demolding process and ensuring that the silicone basin can be smoothly separated from the mold.

[0024] The cooling device 7 further includes a heating device 77 and a spiral heating tube 78. The heating device 77 is fixed to the top of the mounting base 1, and the spiral heating tube 78 is fixed to the outside of the heating device 77 and is located inside the sleeve 74. Through the setting of the above structure, the spiral heating tube 78 heats the air entering the inner mold 4 through the Z-shaped tube 75. The hot air enters the bonding plate 65 through the exhaust port at the outer wall below the bonding plate 65. The bonding plate 65 transports the hot air in the enclosed space to the space between the L-shaped tube 72 and the groove plate 73 through the connecting pipe 76. The bonding plate 65 preheats the outer wall of the inner mold 4. When the liquid silicone is injected, it will contact the relatively warm surface of the inner mold 4, which helps to improve the fluidity of the silicone. When the temperature of the inner mold 4 is close to or slightly higher than the curing temperature of the silicone, the liquid silicone can uniformly fill the mold surface, ensuring that every detail of the mold is well formed. At the same time, preheating can also reduce the too fast cooling rate when the silicone contacts the cold mold, avoiding uneven cooling or surface defects.

[0025] During use, when the silicone basin is in the process of cooling and forming, the fan 71 is started. The fan 71 blows air into the inner mold 4 through the L-shaped tube 72. The generated air flow will be transmitted to the connecting pipe 76 through the groove plate 73. The connecting pipe 76 transports the air flow to the inside of the bonding plate 65, and then the air flow is discharged through the exhaust port of the bonding plate 65. The air flow discharged from the bonding plate 65 will finally be discharged from the inner mold 4 through the Z-shaped tube 75. The air flow passes through the bonding plate 65 and takes away heat, which helps to accelerate the cooling process of the silicone basin, thereby reducing the cooling time of the silicone basin. Especially in large-scale production, rapid cooling can significantly shorten the time of each cycle and increase the output. At the same time, every time the moving ring 63 pulls the hinge rod 1 64 to drive the bonding plate 65 to move towards the center of the inner mold 4, the operation process of the misalignment between the bonding plate 65 and the outer wall of the inner mold 4 and the downward movement of the ejector rod 613 are carried out synchronously. At this time, the bonding plate 65 no longer blocks the long groove of the inner mold 4, and the ejector rod 613 no longer blocks the through groove between the ejector rod 613 and the inner mold 4. At this time, part of the air flow discharged from the exhaust port of the bonding plate 65 will be discharged through the long groove of the inner mold 4 and the through groove between the ejector rod 613 and the inner mold 4. This air flow discharge helps the separation between the silicone basin and the inner mold 4, further reducing the adhesion phenomenon during the demolding process and ensuring that the silicone basin can be smoothly separated from the mold.

[0026] Before injecting the liquid silicone into the space between the outer mold 3 and the inner mold 4 through the injection tube 26, start the heating device 77. The heating device 77 heats the spiral heating tube 78, and the spiral heating tube 78 heats the air inside the sleeve 74. At this time, start and switch the rotation direction of the fan 71. The fan 71 extracts the air inside the inner mold 4 and discharges it outward. During this process, the external air will enter the inner mold 4 through the Z-shaped tube 75. When the external air passes through the Z-shaped tube 75, the spiral heating tube 78 will heat the air entering the inner mold 4 through the Z-shaped tube 75. Then, the hot air enters the fitting plate 65 through the exhaust port at the lower outer wall of the fitting plate 65. The fitting plate 65 conveys the hot air in the enclosed space to the space between the L-shaped tube 72 and the groove plate 73 through the connecting pipe 76. The fitting plate 65 preheats the outer wall of the inner mold 4. The liquid silicone will contact the relatively warm surface of the inner mold 4 after being injected, which helps to improve the fluidity of the silicone. When the temperature of the inner mold 4 is close to or slightly higher than the curing temperature of the silicone, the liquid silicone can uniformly fill the mold surface, ensuring good molding of every detail of the mold. At the same time, the preheating can also reduce the too fast cooling rate when the silicone contacts the cold mold, avoiding uneven cooling or surface defects.

[0027] It should be noted that when the fitting plate 65 is displaced or one end of the Z-shaped tube 75 is driven downward by the inner mold 4 through the groove plate 73, since both the connecting pipe 76 and the Z-shaped tube 75 are made of telescopic bellows, the existence of the connecting pipe 76 and the Z-shaped tube 75 will not interfere with the operation of the fitting plate 65 and the inner mold 4.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automatic demolding device for a silicone injection molding machine, comprising a mounting base (1), characterized in that: The bottom of the installation base (1) is fixed with an outer mold (3), an injection molding assembly (2) is arranged outside the outer mold (3), a driving motor (5) is fixed on the top of the installation base (1), and an auxiliary device (6) is arranged inside the outer mold (3). The auxiliary device (6) includes a second screw rod (61) and two L-shaped limiting plates (66). The second screw rod (61) is fixed at the bottom of the output end of the driving motor (5). A connecting plate (62) is threadedly connected to the outside of the second screw rod (61). An inner mold (4) is fixed to the outside of the connecting plate (62). A number of long grooves are evenly formed in the outer circumference of the inner mold (4). A fitting plate (65) is slidably installed in each of the number of long grooves of the inner mold (4). Elastic telescopic columns (610) are fixed to both sides of the bottom of the connecting plate (62). A moving ring (63) is fixed to the telescopic end of the elastic telescopic column (610). The outer wall of the moving ring (63) is hingedly connected to the outer wall of the fitting plate (65) through a first hinge rod (64). Elastic plates (68) are fixed to both sides of the inner wall of the moving ring (63). The two L-shaped limiting plates (66) are both fixed to the bottom of the installation base (1). A resisting plate (67) is fixed to the side of each of the two L-shaped limiting plates (66) away from each other.

2. The automatic demoulding device of a silicone injection molding machine according to claim 1, characterized in that: The two L-shaped limiting plates (66) are respectively located on both sides of the second screw rod (61). Through openings for the L-shaped limiting plates (66) to slide are formed in both sides of the top of the connecting plate (62).

3. The automatic demoulding device of a silica gel injection molding machine according to claim 1, characterized in that: The resisting plate (67) is located on the movement track of the elastic plate (68). A distance of two centimeters is left between the resisting plate (67) and the inner wall of the moving ring (63).

4. The automatic demolding device of a silicone injection molding machine according to claim 1, wherein: The injection molding assembly (2) includes two chute plates (21) fixed to both sides of the bottom of the installation base (1). A sliding column (22) is fixed inside one of the chute plates (21). A support arm (24) is slidably installed on the outside of the sliding column (22). A first screw rod (23) is rotatably installed inside the other chute plate (21), and the first screw rod (23) is driven by a servo motor. A second support arm (24) is threadedly connected to the outside of the first screw rod (23). A cover plate (25) is fixed between the bottoms of the two support arms (24). An injection molding pipe (26) is fixed to the bottom of the cover plate (25).

5. The automatic demolding device of a silicone injection molding machine according to claim 1, characterized in that: A U-shaped knocking plate (69) is fixed to the side of the fitting plate (65) close to the center of the inner mold (4).

6. The automatic demoulding device of a silicone injection molding machine according to claim 5, characterized in that: One end of the U-shaped knocking plate (69) away from the fitting plate (65) is in contact with the inner wall of the inner mold (4).

7. An automatic demoulding device for a silicone injection molding machine according to claim 1, characterized in that: A push rod (611) is fixed to the outer wall below the side of the fitting plate (65) close to the center of the inner mold (4). A second hinge rod (612) is hinged to the side of the push rod (611) away from the fitting plate (65). A ejector rod (613) is hinged to the end of the second hinge rod (612) away from the push rod (611). The ejector rod (613) penetrates and is slidably installed at the bottom of the inner wall of the inner mold (4). The ejector rod (613) is arranged in an "L" shape.

8. The automatic demolding device of a silicone injection molding machine according to claim 1, characterized in that: A cooling device (7) is provided at the inner mold (4). The cooling device (7) includes a blower (71), a groove plate (73), and a sleeve (74). The blower (71) is fixed to the top of the mounting base (1). The air outlet of the blower (71) is connected to the top of the mounting base (1) through an L-shaped pipe (72). The groove plate (73) is fixed to the upper inner wall of the inner mold (4). The bottom of the groove plate (73) is connected to the upper outer wall of the fitting plate (65) through a connecting pipe (76). The sleeve (74) is fixed to the top of the mounting base (1). The top of the inner wall of the sleeve (74) is connected to the top of the groove plate (73) through a Z-shaped pipe (75). Both the connecting pipe (76) and the Z-shaped pipe (75) are provided as telescopic bellows.

9. The automatic demoulding device of a silicone injection molding machine according to claim 8, wherein: The L-shaped pipe (72) is used to introduce the air flow generated by the blower (71) into the interior of the inner mold (4). The fitting plate (65) is provided with a hollow structure, and an exhaust port is provided at the lower outer wall of the fitting plate (65).

10. The automatic demoulding device of a silica gel injection molding machine according to claim 8, characterized in that: The cooling device (7) further includes a heating device (77) and a spiral heating pipe (78). The heating device (77) is fixed to the top of the mounting base (1). The spiral heating pipe (78) is fixed to the outside of the heating device (77), and the spiral heating pipe (78) is located inside the sleeve (74).

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