Automatic demoulding device for silicone injection molding machine

Abstract

The present invention discloses an automatic demoulding device for a silicone injection molding machine, and relates to the technical field of silicone product production. The present invention includes a mounting base, an outer mold is fixed to the bottom of the mounting base, an injection molding assembly is arranged on the outside of the outer mold, and the injection molding assembly includes two slide plates fixed on both sides of the bottom of the mounting base, a slide column is fixed inside one of the slide plates, and a support arm is slidably installed on the outside of the slide column. The present invention provides an auxiliary device so that the bonding plate and the outer wall of the inner mold are misaligned, so that the bonding plate is separated from the inner wall of the silicone basin after molding, 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, thereby avoiding strong adsorption or adhesion between the silicone basin and the inner mold during the molding process, which helps to avoid the silicone basin after molding being damaged or difficult to be smoothly separated from the mold during demoulding.

Description

Technical Field

[0001] The invention relates to the technical field of silicone product production, in particular to an automatic demoulding device for a silicone injection molding machine. Background Art

[0002] A silicone injection molding machine is a device used to produce silicone products. It uses an injection molding process to inject liquid silicone into a mold, where it is cured by heating to form the final product. This equipment is widely used in the electronics, automotive, and other fields, and is particularly important in the manufacture of electrical products. As an excellent insulating material, silicone is commonly used in the manufacture of seals, gaskets, connectors, and other components of electronic components. Its excellent electrical insulation and high-temperature resistance enhance the safety and stability of electrical products. After the silicone product is injected, it needs to be demolded.

[0003] Chinese patent publication number CN218700993U discloses a silicone product demolding device, comprising a housing, a mold groove formed on the upper surface of the housing, a mounting cavity formed within the housing, a double-headed motor fixedly connected to the interior of the mounting cavity, a threaded rod fixedly connected to the output shaft of the double-headed motor, a threaded block threadedly connected to the outer surface of the threaded rod, a first mounting seat fixedly connected to the upper end of the threaded block, a connecting rod rotatably connected to the interior of the first mounting seat, one end of the connecting rod rotatably connected to the second mounting seat, a lifting plate fixedly connected to the upper end of the second mounting seat, a plurality of ejector pins fixedly connected to the upper end of the lifting plate, and an ejector plate fixedly connected to the upper end of each ejector pin. By providing the double-headed motor, threaded rod, threaded block, first mounting seat, second mounting seat, and connecting rod, the lifting plate is driven to rise, thereby driving the ejector pins and ejector plate to rise, ejecting the silicone product without manual removal, thereby improving production efficiency.

[0004] However, the current demoulding device has the following problems: when the demoulding device is demoulding the silicone basin, the contact area between the silicone basin and the mold is large. The large contact area easily increases the friction 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 silicone injection molding machines. Summary of the Invention

[0005] In view of the deficiencies in 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 technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic demoulding device for a silicone injection molding machine, comprising a mounting base, an outer mold fixed to the bottom of the mounting base, an injection molding assembly provided on the outside of the outer mold, and two slide plates fixed on both sides of the bottom of the mounting base, a slide column fixed to the inside of one of the slide plates, a support arm slidably installed on the outside of the slide column, a screw rod 1 rotatably installed on the inside of the other slide plate, and the screw rod 1 is driven by a servo motor, the outer thread of the screw rod 1 is connected to another support arm, and the bottoms of the two support arms are connected. A cover plate is fixed between the two ends of the outer mold, an injection molding tube is fixed to the bottom of the cover plate, a driving motor is fixed to the top of the mounting base, an auxiliary device is provided inside the outer mold, and the auxiliary device includes a screw rod 2 and two L-shaped limit plates. The screw rod 2 is fixed to the bottom of the output end of the driving motor, and the external thread of the screw rod 2 is connected to a connecting plate. The outer surface of the connecting plate is fixed with an inner mold, and a plurality of long grooves are evenly opened on the outer circumference of the inner mold. Fitting plates are slidably installed inside the plurality of long grooves of the inner mold. Elastic telescopic columns are fixed on both sides of the bottom of the connecting plate, and the bottom of the telescopic end of the elastic telescopic column is fixed. The cam is fixed to the base frame of the second frame by means of a hinged rod, and the cam is fixed to the base frame of the second frame by means of a hinged rod. The cam is fixed to the base frame of the second frame by means of a hinged rod, and the cam is fixed to the base frame of the second frame by means of a hinged rod. The cam is fixed to the base frame of the second frame by means of a hinged rod, and the cam is fixed to the base frame of the second frame. The outside of the limiting plate moves downward, and 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 drives the hinge rod 1 and the moving ring to move downward through the fitting plate. When the moving ring moves, it also drives the spring plate to move downward. When the spring plate moves to the contact plate position, the contact plate presses against the bottom of the spring plate to drive the spring plate to deform upward. In this process, the spring plate drives the moving ring to displace, and the moving ring squeezes the telescopic end of the elastic telescopic column. The moving ring pulls the hinge rod 1 to drive the fitting plate to move along the long groove of the inner mold toward 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 solution, a U-shaped knocking plate is fixed on the side of the bonding plate close to the center of the inner mold, and the 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. 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 the push rod is hinged to a hinge rod 2 on the side of the push rod away from the bonding plate, and a push rod is hinged to an end of the hinge rod 2 away from the push rod. The push rod passes through and is slidably installed on the bottom of the inner wall of the inner mold, and the push rod is set in an "L-shape". In the process of the moving ring pulling the hinge 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 hinge rod 2 to drive the push rod to move downward, so that the push rod can apply 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 plate, 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 plate is fixed at the upper inner wall of the inner mold, and the bottom of the groove plate 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 plate by a Z-shaped tube. The connecting tube and the Z-shaped tube are both retractable bellows settings, which are used 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 outer wall misalignment of the bonding plate and the inner mold and the downward movement of the ejector rod are carried out synchronously. At this time, the bonding 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 bonding plate will be discharged through the long groove of the inner mold and the through groove between the ejector rod and the inner mold.

[0010] According to the above technical solution, the cooling device also includes a heating device and a spiral heating tube. The heating device is fixed on the top of the mounting base, and the spiral heating tube is fixed on the outside of the heating device, and the spiral heating tube is located inside the sleeve. Before the liquid silicone is injected between the outer mold and the inner mold through the injection molding tube, the heating device is started, and 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. In 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. The bonding plate transports the hot air in the enclosed space through the connecting tube to between the L-shaped tube and the groove plate, and the bonding plate will preheat the outer wall of the inner mold.

[0011] The present invention provides an automatic demoulding device for a silicone injection molding machine. It has the following beneficial effects:

[0012] (1) The present invention sets up auxiliary devices, so that the driving motor, screw rod 2, connecting plate, L-shaped limit plate, inner mold, outer mold, hinge rod 1, moving ring, spring plate, and contact plate cooperate to drive the laminating plate to be dislocated with the outer wall of the inner mold, so that the laminating plate is separated from the inner wall of the silicone basin after molding, 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, thereby avoiding the strong adsorption or adhesion of the silicone basin to the inner mold during the molding process, which helps to avoid the silicone basin after molding being damaged or difficult to be smoothly separated from the mold during demolding; at the same time, the moving ring, hinge rod 1, laminating plate, inner mold, contact plate, and spring plate cooperate to drive the U-shaped knocking plate to hit the inner wall of the inner mold, thereby causing the inner mold to vibrate, 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 degree of adhesion or deformation, the vibration helps to break the physical contact between the silicone and the inner mold, reduce the adhesion force, and thus make it easier to achieve separation.

[0013] (2) The present invention drives the ejector pin downward by cooperating with the movable ring, hinge rod 1, laminating plate, inner mold, push rod, and hinge rod 2, so that the ejector pin can exert additional demoulding force. Because the silicone material usually clings to the inner wall of the mold after cooling, by pushing the ejector pin downward, the adhesion force between the silicone basin and the mold can be effectively reduced, thereby achieving smooth demoulding. It can realize an automated demoulding process, reduce manual intervention, and make the demoulding of the silicone basin more stable and reliable.

[0014] (3) The present invention sets up a cooling device. When the silicone basin is in the process of cooling and forming, the fan, L-shaped tube, inner mold, groove plate and connecting tube cooperate to drive the air flow to the inside of the bonding plate, and then the air flow is discharged through the exhaust port of the bonding plate. The air flow passes through the bonding plate and takes away the 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 production. At the same time, when the bonding plate moves toward the center of the inner mold, the bonding 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 bonding plate will pass through the long groove of the inner mold and the ejector rod and the through groove between the inner mold and the ejector rod. The through-grooves between the inner molds are used for discharge. This airflow discharge helps to separate the silicone basin from the inner mold, further reducing the adhesion during the demoulding process and ensuring that the silicone basin can be smoothly separated from the mold. At the same time, the heating device, spiral heating tube, sleeve, fan, and Z-shaped tube work together to drive the laminating plate to preheat the outer wall of the inner mold. After injection, the liquid silicone will contact the relatively warm surface of the inner mold, 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 to ensure that every detail of the mold is well formed. At the same time, preheating can also reduce the rapid cooling rate of the silicone when it contacts the cold mold, avoiding uneven cooling or surface defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the present invention as a whole Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the present invention as a whole Figure 2 ;

[0017] Figure 3 A schematic diagram of a partial cross section of the present invention;

[0018] Figure 4 is a schematic diagram of the injection molding component of the present invention;

[0019] Figure 5 is a schematic diagram of the auxiliary device of the present invention;

[0020] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at A;

[0021] Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure at B;

[0022] Figure 8 Schematic diagram of the local structure of the auxiliary device of the present invention Figure 1 ;

[0023] Figure 9 Schematic diagram of the local structure of the auxiliary device of the present invention Figure 2 ;

[0024] Figure 10 Schematic diagram of the inner mold of the present invention Figure 1 ;

[0025] Figure 11 Schematic diagram of the inner mold of the present invention Figure 2 ;

[0026] Figure 12 Schematic diagram of the cooling device of the present invention Figure 1 ;

[0027] Figure 13 Schematic diagram of the cooling device of the present invention Figure 2 .

[0028] In the figure: 1. Mounting base; 2. Injection molding component; 21. Slide plate; 22. Slide column; 23. Screw rod 1; 24. Support arm; 25. Cover plate; 26. Injection molding tube; 3. Outer mold; 4. Inner mold; 5. Drive motor; 6. Auxiliary device; 61. Screw rod 2; 62. Connecting plate; 63. Moving ring; 64. Articulated rod 1; 65. Fitting plate; 66. L-shaped limit plate; 67. Resistance plate; 68. Spring plate; 69. U-shaped knocking plate; 610. Elastic telescopic column; 611. Push rod; 612. Articulated rod 2; 613. Push rod; 7. Cooling device; 71. Fan; 72. L-shaped tube; 73. Grooved disk; 74. Sleeve; 75. Z-shaped tube; 76. Connecting tube; 77. Heating device; 78. Spiral heating tube. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] See also Figures 1-13One embodiment of the present invention is: an automatic demoulding device for a silicone injection molding machine, comprising a mounting base 1, an outer mold 3 is fixed to the bottom of the mounting base 1, an injection molding component 2 is arranged on the outside of the outer mold 3, and the injection molding component 2 includes two slide plates 21 fixed to both sides of the bottom of the mounting base 1, a slide column 22 is fixed inside one slide plate 21, a support arm 24 is slidably installed on the outside of the slide column 22, a screw rod 23 is rotatably installed inside the other slide plate 21, and the screw rod 23 is driven by a servo motor, and the outer thread of the screw rod 23 is connected to another support arm 24, the two A cover plate 25 is fixed between the bottoms of the support arms 24, an injection molding tube 26 is fixed to the bottom of the cover plate 25, a drive motor 5 is fixed to the top of the mounting base 1, an auxiliary device 6 is provided inside the outer mold 3, the auxiliary device 6 includes a screw rod 2 61 and two L-shaped limit plates 66, the screw rod 2 61 is fixed to the bottom of the output end of the drive motor 5, the external thread of the screw rod 2 61 is connected to a connecting plate 62, the outside of the connecting plate 62 is fixed with the inner mold 4, the outer circumference of the inner mold 4 is evenly provided with a plurality of long grooves, the inner mold 4 is slidably installed with a fitting plate 65 inside the plurality of long grooves, the bottom of the connecting plate 62 Elastic telescopic columns 610 are fixed on both sides, and a mobile ring 63 is fixed to the bottom of the telescopic end of the elastic telescopic column 610. The outer wall of the mobile ring 63 is hingedly connected to the outer wall of the fitting plate 65 by a hinge rod 1 64. Spring plates 68 are fixed on both sides of the inner wall of the mobile ring 63. Two 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 screw 2 61. Both sides of the top of the connecting plate 62 are provided with through openings for the L-shaped limit plates 66 to slide. A contact plate 67 is fixed on the side away from each other of the two L-shaped limit plates 66. The contact plate 67 is located at the elastic On the movement trajectory of plate 68, a two-centimeter gap is left between the resistance plate 67 and the inner wall of the movable ring 63. Through the arrangement of the above-mentioned structure, 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 strong adsorption or adhesion between the silicone basin and the inner mold 4 during the molding process. This helps to avoid damage to the molded silicone basin during demolding or difficulty in smoothly removing from the mold.

[0031] Laminating plate 65 (such as Figure 8(As shown in the figure) A U-shaped knocking plate 69 is fixed on one side close to the center of the inner mold 4, and the end of the U-shaped knocking plate 69 away from the bonding plate 65 is in contact with the inner wall of the inner mold 4. Through the arrangement of the above structure, the bonding plate 65 drives the U-shaped knocking plate 69 to hit the inner wall of the inner mold 4 during the resetting process, 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 degree of 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 separation easier.

[0032] The push rod 611 is fixed to the outer wall below the side of the bonding plate 65 close to the center of the inner mold 4, and the push rod 611 is hinged to the hinge rod 2 612 on the side of the push rod 611 away from the bonding plate 65. The hinge rod 2 612 is hinged to the push rod 613 at one end away from the push rod 611. The push rod 613 passes through and is slidably installed on the bottom of the inner wall of the inner mold 4. The push rod 613 is set in an "L" shape. When the moving ring 63 pulls the hinge 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 push rod 611 pushes the hinge rod 2 612 to drive the push rod 613 to move downward, so that the push rod 613 can apply additional demoulding force. Because the silicone material usually adheres to the inner wall of the mold after cooling, by pushing the push rod 613 downward, the adhesion force between the silicone basin and the mold can be effectively reduced, thereby achieving smooth demoulding, realizing an automated demoulding process, reducing manual intervention, and making the demoulding of the silicone basin more stable and reliable.

[0033] 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 servo motor drives the screw 1 23 to rotate, and the screw 1 23 drives the support arm 24 to move along the inside of the slide plate 21, and 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 2 61 to rotate. The screw 2 61 drives the connecting plate 62 to move downward along the outside of the L-shaped limit plate 66, and 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 belt of the spring plate 68 The movable spring plate 68 deforms 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 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 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 strong adsorption or adhesion between the silicone basin and the inner mold 4 during the molding process, which helps to avoid damage to the molded silicone basin during demoulding or difficulty in smoothly removing from the mold. 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 contact plate 67 here is also fixed.

[0034] When the movable ring 63 pulls the hinge 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 hinge 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 will drive 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 separation easier.

[0035] In the process of the moving ring 63 pulling the hinge 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 push rod 611 to move along, and the push rod 611 pushes the hinge rod 2 612 to drive the push rod 613 to move downward, so that the push rod 613 can apply additional demoulding force. Because the silicone material usually adheres to the inner wall of the mold after cooling, by pushing the push rod 613 downward, the adhesion force between the silicone basin and the mold can be effectively reduced, thereby achieving smooth demoulding, realizing an automated demoulding process, reducing manual intervention, and making the demoulding of the silicone basin more stable and reliable.

[0036] See also 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, and the cooling device 7 includes a fan 71, a groove plate 73, and a sleeve 74. The fan 71 is fixed to the top of the mounting base 1, and the air outlet of the fan 71 is connected to the top of the mounting base 1 by an L-shaped tube 72. The L-shaped tube 72 is used to introduce the airflow generated by the fan 71 into the interior of the inner mold 4. The groove plate 73 is fixed to the upper inner wall of the inner mold 4, and the bottom of the groove plate 73 is connected to the upper outer wall of the bonding plate 65 by a connecting tube 76. The bonding plate 65 is a hollow structure, and an exhaust port is opened at the lower outer wall of the bonding plate 65. The sleeve 74 is fixed to the top of the mounting base 1, and the inner wall top of the sleeve 74 and the top of the groove plate 73 are connected. Connected by a Z-shaped tube 75, the connecting tube 76 and the Z-shaped tube 75 are both retractable bellows. When the silicone basin is in the process of cooling and forming, the above-mentioned structure allows the air flow to pass through the bonding plate 65 and take 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 production. At the same time, the above-mentioned structure allows part of the air flow discharged from the exhaust port of the bonding plate 65 to be discharged through the long groove of the inner mold 4 and the through groove between the top rod 613 and the inner mold 4. This airflow discharge helps to separate the silicone basin from the inner mold 4, further reduces the adhesion phenomenon during the demolding process, and ensures that the silicone basin can be smoothly separated from the mold.

[0037] The cooling device 7 also includes a heating device 77 and a spiral heating tube 78. The heating device 77 is fixed on the top of the mounting base 1, the spiral heating tube 78 is fixed on the outside of the heating device 77, and the spiral heating tube 78 is located inside the sleeve 74. Through the arrangement of the above structure, the spiral heating tube 78 will heat the air entering the inner mold 4 through the Z-shaped tube 75, and 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 through the connecting tube 76 to between the L-shaped tube 72 and the groove plate 73. The bonding plate 65 will preheat the outer wall of the inner mold 4. After injection, the liquid silicone 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 evenly fill the mold surface to ensure that every detail of the mold is well formed. At the same time, preheating can also reduce the excessive cooling rate of the silicone when it contacts the cold mold, thereby avoiding uneven cooling or surface defects.

[0038] When in use, when the silicone basin is in the process of cooling and forming, the fan 71 is started, and the fan 71 blows air into the interior of the inner mold 4 through the L-shaped tube 72. The generated wind flow is transmitted to the connecting tube 76 through the groove plate 73. The connecting tube 76 conveys the wind flow to the interior 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 the 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 improve production. At the same time, In the process of ring 63 pulling hinge rod 64 to drive bonding plate 65 to move toward the center of inner mold 4, the bonding plate 65 and the outer wall of inner mold 4 are misaligned and the push rod 613 moves downward. At this time, bonding plate 65 no longer blocks the long groove of inner mold 4, and push rod 613 no longer blocks the through groove between push rod 613 and inner mold 4. At this time, part of the airflow discharged from the exhaust port of bonding plate 65 will be discharged through the long groove of inner mold 4 and the through groove between push rod 613 and inner mold 4. This airflow discharge helps to separate the silicone basin from inner mold 4, further reduces the adhesion phenomenon during demolding, and ensures that the silicone basin can be smoothly separated from the mold.

[0039] Before the liquid silicone is injected into the space between the outer mold 3 and the inner mold 4 through the injection tube 26, the heating device 77 is started, and 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, the rotation direction of the fan 71 is started and switched, and the fan 71 extracts the air inside the inner mold 4 and discharges it outward. During this process, the outside air will enter the inner mold 4 through the Z-shaped tube 75. When the outside 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 passes through the outer wall below the bonding plate 65. The exhaust port at the laminating plate 65 enters the laminating plate 65, and the laminating 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 laminating plate 65 will preheat the outer wall of the inner mold 4. After injection, the liquid silicone 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 evenly fill the mold surface to ensure that every detail of the mold is well formed. At the same time, preheating can also reduce the rapid cooling rate of the silicone when it contacts the cold mold, avoiding uneven cooling or surface defects.

[0040] It should be noted that when the bonding plate 65 is displaced or the inner mold 4 drives one end of the Z-shaped tube 75 to displace downward through the groove plate 73, since the connecting tube 76 and the Z-shaped tube 75 are both retractable bellows, the existence of the connecting tube 76 and the Z-shaped tube 75 will not interfere with the operation of the bonding plate 65 and the inner mold 4.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic demoulding device for a silicone injection molding machine, comprising a mounting base (1), characterized in that: An outer mold (3) is fixed to the bottom of the mounting base (1), an injection molding assembly (2) is provided on the outside of the outer mold (3), a driving motor (5) is fixed to the top of the mounting base (1), an auxiliary device (6) is provided inside the outer mold (3), and the auxiliary device (6) comprises 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), the external thread of the second screw (61) is connected to a connecting plate (62), the external surface of the connecting plate (62) is fixed to the inner mold (4), and the outer circumference of the inner mold (4) is evenly provided with a plurality of long Grooves, a plurality of long grooves of the inner mold (4) are slidably mounted with a bonding plate (65), elastic telescopic columns (610) are fixed on both sides of the bottom of the connecting plate (62), a moving ring (63) is fixed on the bottom of the telescopic end of the elastic telescopic column (610), the outer wall of the moving ring (63) and the outer wall of the bonding plate (65) are hingedly connected by a hinge rod (64), and spring plates (68) are fixed on both sides of the inner wall of the moving ring (63), the two L-shaped limiting plates (66) are fixed on the bottom of the mounting base (1), and a contact plate (67) is fixed on the side away from each other of the two L-shaped limiting plates (66); The contact plate (67) is located on the movement track of the spring plate (68), and a two-centimeter gap is left between the contact plate (67) and the inner wall of the moving ring (63).

2. The automatic demoulding device for 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), and both sides of the top of the connecting plate (62) are provided with openings for the L-shaped limiting plates (66) to slide.

3. The automatic demoulding device for a silicone injection molding machine according to claim 1, characterized in that: The injection molding component (2) includes two slide plates (21) fixed on both sides of the bottom of the mounting base (1), a slide column (22) is fixed inside one of the slide plates (21), a support arm (24) is slidably installed outside the slide column (22), a screw rod (23) is rotatably installed inside the other slide plate (21), and the screw rod (23) is driven by a servo motor, the external thread of the screw rod (23) is connected to the other support arm (24), a cover plate (25) is fixed between the bottoms of the two support arms (24), and an injection molding tube (26) is fixed at the bottom of the cover plate (25).

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

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

6. The 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 laminating 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 laminating plate (65). An end of the second hinge rod (612) away from the push rod (611) is hinged to a push rod (613). The push rod (613) passes through and is slidably installed on the bottom of the inner wall of the inner mold (4). The push rod (613) is arranged in an "L" shape.

7. The automatic demoulding device for a silicone injection molding machine according to claim 1, characterized in that: The inner mold (4) is provided with a cooling device (7), the cooling device (7) comprising a fan (71), a groove plate (73), and a sleeve (74), the fan (71) being fixed on the top of the mounting base (1), the air outlet of the fan (71) being connected to the top of the mounting base (1) via an L-shaped tube (72), the groove plate (73) being fixed on the upper inner wall of the inner mold (4), the bottom of the groove plate (73) being connected to the upper outer wall of the laminating plate (65) via a connecting tube (76), the sleeve (74) being fixed on the top of the mounting base (1), the inner wall top of the sleeve (74) being connected to the top of the groove plate (73) via a Z-shaped tube (75), the connecting tube (76) and the Z-shaped tube (75) being both retractable bellows.

8. The automatic demoulding device for a silicone injection molding machine according to claim 7, characterized in that: The L-shaped tube (72) is used to introduce the airflow generated by the fan (71) into the interior of the inner mold (4). The laminating plate (65) is a hollow structure, and an exhaust port is provided on the lower outer wall of the laminating plate (65).

9. The automatic demoulding device for a silicone injection molding machine according to claim 7, characterized in that: The cooling device (7) further comprises a heating device (77) and a spiral heating tube (78), wherein the heating device (77) is fixed on the top of the mounting base (1), the spiral heating tube (78) is fixed on the outside of the heating device (77), and the spiral heating tube (78) is located inside the sleeve (74).

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