Mold opening mechanism of refrigerator door liner plastic suction mold

Abstract

The utility model discloses a mold opening mechanism of a refrigerator door liner plastic uptake mold, which relates to the technical field of refrigerator door production and comprises a workbench, an injection molding groove is arranged in the middle of the top surface of the workbench, air storage boxes are arranged on two sides of the bottom of the workbench, and second connecting pipes are fixed and communicated with the side walls of the air storage boxes. The end of the second connecting pipe is fixed and communicated to the bottom of a pneumatic telescopic rod which is fixedly arranged at the bottom of the workbench, and the top end of the pneumatic telescopic rod is fixedly connected with a push plate which is parallel to the bottom face of the injection molding groove. Air bags are arranged on the two sides of the inner wall of the injection molding groove, and a first connecting pipe is fixed to and communicates with the top face of the air storage box. The pneumatic telescopic rod is simple in structure and not prone to faults, and the overall air pressure in the air storage box is low, so that the pneumatic telescopic rod moves slowly, the pneumatic telescopic rod pushes the push plate stably and softly, impact force generated in the mold pushing-out process is reduced, and the mold is not prone to being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerator door production, and particularly relates to a mold opening mechanism for an inner liner thermoforming mold of a refrigerator door. Background Art

[0002] An inner liner thermoforming mold of a refrigerator door heats and softens a thermoplastic plastic plate or sheet (such as ABS, HIPS, etc.) through a specific process, then uses vacuum suction to adsorb it on the mold surface, and finally demolds to obtain a precision part of the refrigerator door inner liner after steps such as cooling and pressure holding. The design and production of such a mold need to consider multiple factors such as the thermoplasticity of the material, the precision of the mold, and the complexity of the forming process. The mold opening mechanism of the inner liner thermoforming mold of a refrigerator door is a crucial part of the mold design, which is responsible for smoothly taking out the formed refrigerator door inner liner from the mold after injection molding.

[0003] For the existing mold opening mechanisms of inner liner thermoforming molds of refrigerator doors, most use mechanical push rods for demolding. When demolding in this way, the mechanical push rods move at a relatively fast speed and have a large impact force when pushing, which easily damages the mold. During the mold opening process, the mold groove directly contacts the mold, increasing the friction between the mold and the mold groove, affecting the surface quality of the mold. At the same time, when demolding, the mold fits with the inner wall of the mold groove, making it inconvenient to take out the mold.

[0004] Therefore, it is necessary to propose a mold opening mechanism for an inner liner thermoforming mold of a refrigerator door to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a mold opening mechanism for an inner liner thermoforming mold of a refrigerator door to solve the problems that when using a mechanical push rod for demolding, the moving speed is relatively fast, the impact force when pushing is large, which easily damages the mold, during the mold opening process, the mold groove directly contacts the mold, increasing the friction between the mold and the mold groove, affecting the surface quality of the mold, and at the same time, when demolding, the mold fits with the inner wall of the mold groove, making it inconvenient to take out the mold.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A mold opening mechanism for an inner liner thermoforming mold of a refrigerator door, including a workbench. A plastic injection groove is opened in the middle of the top surface of the workbench. Air storage boxes are arranged on both sides of the bottom of the workbench. A second connecting pipe is fixedly connected and communicated with the side wall of the air storage box. The end of the second connecting pipe is fixedly connected and communicated with the bottom of a pneumatic telescopic rod. The pneumatic telescopic rod is fixedly arranged at the bottom of the workbench. The top end of the pneumatic telescopic rod is fixedly connected with a push plate, and the push plate is parallel to the bottom surface of the plastic injection groove;

[0007] Air bags are arranged on both sides of the inner wall of the plastic injection groove. A first connecting pipe is fixedly connected and communicated with the top surface of the air storage box. The top end of the first connecting pipe is fixedly connected and communicated with the side wall of the air bag.

[0008] Preferably, a plurality of support rods are fixedly connected to the top surface of the workbench, the top ends of the support rods are fixedly connected with a top plate, an electric cylinder is fixedly connected to the middle of the top surface of the top plate, a piston rod is slidably connected to the bottom surface of the electric cylinder, and a pressing plate is fixedly connected to the bottom end of the piston rod.

[0009] Preferably, cylindrical rods are slidably arranged on both sides of the workbench, a pressing piece is fixedly connected to the top end of the cylindrical rod, and a spring is fixedly connected between the bottom surface of the pressing piece and the top surface of the workbench, and the spring is movably sleeved on the outer periphery of the cylindrical rod.

[0010] Preferably, cylindrical air cylinders are arranged on both sides of the workbench, a third connecting pipe is fixedly connected and communicated with the bottom of the cylindrical air cylinder, the bottom end of the third connecting pipe is fixedly connected and communicated with the top surface of the air storage box, a spring is fixedly connected to the bottom end of the cylindrical rod, and a piston push plate is fixedly connected to the bottom surface of the spring, and the spring and the piston push plate are slidably connected inside the cylindrical air cylinder.

[0011] Preferably, a first electromagnetic valve is arranged on the first connecting pipe, and a second electromagnetic valve is arranged on the second connecting pipe.

[0012] The technical effects and advantages of the present utility model:

[0013] 1. In the present utility model, the pneumatic telescopic rod has a simple structure and is not prone to failure. The overall air pressure in the air storage box is relatively low, so that the pneumatic telescopic rod moves slowly. When the pneumatic telescopic rod pushes the push plate, it is stable and gentle, which helps to reduce the impact force during the mold ejection process and is not easy to damage the mold.

[0014] 2. During the mold opening process of the present utility model, the airbag can play a buffering role, reducing the direct impact and friction of the mold, thereby protecting the surface quality of the mold. When the airbag is in the inflated state, a separation layer is formed between the mold and the injection molding groove. When demolding is required, the airbag is deflated, and its volume shrinks rapidly, so as to easily separate the inner liner of the refrigerator door from the injection molding groove, which is convenient for better removing the mold from the injection molding groove. Description of the drawings

[0015] Figure 1 It is a schematic diagram of the plastic suction mold and mold opening mechanism of the present utility model.

[0016] Figure 2 It is a schematic cross-sectional view of the plastic suction mold and mold opening mechanism of the present utility model.

[0017] Figure 3 It is the present utility model Figure 2 The enlarged schematic view at A in.

[0018] In the figure: 1. Workbench; 11. Injection molding groove;

[0019] 2. Air storage box; 21. First connecting pipe; 22. Airbag; 23. Second connecting pipe; 24. Pneumatic telescopic rod; 25. Push plate; 26. First solenoid valve; 27. Second solenoid valve;

[0020] 3. Pressing piece; 31. Cylindrical rod; 32. Spring; 33. Piston push plate; 34. Cylindrical air cylinder; 35. Third connecting pipe;

[0021] 4. Support rod; 41. Top plate; 42. Electric cylinder; 43. Piston rod; 44. Pressure plate. Detailed implementation manner

[0022] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention aims to solve the problems that when using a mechanical push rod for demolding, the moving speed is relatively fast, the impact force during pushing is relatively large, which easily damages the mold. During the mold opening process, the mold groove is in direct contact with the mold, increasing the friction between the mold and the mold groove, affecting the surface quality of the mold. At the same time, when demolding, the mold fits with the inner wall of the mold groove, making it inconvenient to take out the mold, and provides a Figures 1 - 3 demolding mechanism for a refrigerator door inner liner thermoforming mold as shown in the figure, including a workbench 1. In the middle of the top surface of the workbench 1, an injection molding groove 11 is opened. On both sides of the bottom of the workbench 1, an air storage box 2 is provided. A second connecting pipe 23 is fixedly connected and communicated with the side wall of the air storage box 2. The end of the second connecting pipe 23 is fixedly connected and communicated with the bottom of the pneumatic telescopic rod 24. The pneumatic telescopic rod 24 is fixedly arranged at the bottom of the workbench 1. The top end of the pneumatic telescopic rod 24 is fixedly connected with a push plate 25. The push plate 25 is parallel to the bottom surface of the injection molding groove 11. When the mold in the injection molding groove 11 is injection molded, the push plate 25 can push the mold in the injection molding groove 11 out. During use, the air storage box 2 conveys gas into the second connecting pipe 23, and the second connecting pipe 23 conveys it to the pneumatic telescopic rod 24. The pneumatic telescopic rod 24 pushes up the push plate 25 at the top, and the push plate 25 pushes the mold out of the injection molding groove 11. The pneumatic telescopic rod 24 has a simple structure and is not prone to failure. The overall air pressure in the air storage box 2 is relatively low, so that the pneumatic telescopic rod 24 moves slowly. When the pneumatic telescopic rod 24 pushes the push plate 25, it is stable and gentle, which helps to reduce the impact force during the mold pushing process and is not easy to damage the mold.

[0024] It should be noted that a vacuum pump or compressor for increasing or decreasing the air pressure is provided around the air storage box 2 to ensure that the gas in the air storage box 2 is maintained at the threshold value for the normal operation of the equipment.

[0025] Furthermore, air bags 22 are arranged on both sides of the inner wall of the injection molding groove 11. The top surface of the air storage box 2 is fixedly connected and communicated with a first connecting pipe 21, and the top end of the first connecting pipe 21 is fixedly connected and communicated with the side wall of the air bag 22. When the air bag 22 is inflated, it can closely fit the complex shape of the mold, ensuring the accuracy and consistency of the plastic suction product. After being inflated, the air bag 22 can quickly position and center, ensuring the stability and accuracy of the mold during the processing, thereby improving the processing precision and efficiency. During the mold opening process, the air bag 22 can play a buffering role, reducing the direct impact and friction of the mold, thereby protecting the surface quality of the mold. When the air bag 22 is in the inflated state, an isolation layer is formed between the mold and the injection molding groove 11. When demolding is required, the air bag 22 is deflated, and its volume rapidly shrinks, so that the inner liner of the refrigerator door can be easily separated from the injection molding groove 11, facilitating the better removal of the mold from the injection molding groove 11.

[0026] In this embodiment, a first electromagnetic valve 26 is arranged on the first connecting pipe 21, and a second electromagnetic valve 27 is arranged on the second connecting pipe 23. During demolding, the first electromagnetic valve 26 is opened, and the air of the first electromagnetic valve 26 enters the air storage box 2, and the air bag 22 moves away from the refrigerator inner liner. At this time, demolding is more convenient. The first electromagnetic valve 26 is closed, the second electromagnetic valve 27 is opened, and the pressing piece 3 is pressed. The cooperation of the components enables the push plate 25 to push the mold out of the injection molding groove 11 to complete demolding. After demolding is completed, the components return to their original positions, the second electromagnetic valve 27 is closed, the first electromagnetic valve 26 is opened, and the air in the air storage box 2 is conveyed to the air bag 22 to complete the inflation of the air bag 22. If more air needs to be injected into the air bag 22, the pressing piece 3 is pressed to input some of the air in the cylindrical air cylinder 34 into the air bag 22.

[0027] In this embodiment, a plurality of support rods 4 are fixedly connected to the top surface of the workbench 1. The top ends of the support rods 4 are fixedly connected with a top plate 41. The middle part of the top surface of the top plate 41 is fixedly connected with an electric cylinder 42. The bottom surface of the electric cylinder 42 is slidably connected with a piston rod 43, and the bottom end of the piston rod 43 is fixedly connected with a pressing plate 44. The support rods 4 help to connect and fix the top plate 41 and the workbench 1. After the electric cylinder 42 is opened, the electric cylinder 42 drives the piston rod 43 thereon to move, so that the pressing plate 44 is pressed into the injection molding groove 11 to complete injection molding.

[0028] It should be noted that cylindrical rods 31 are slidably arranged on both sides of the workbench 1. A pressing piece 3 is fixedly connected to the top end of the cylindrical rod 31. A spring 32 is fixedly connected between the bottom surface of the pressing piece 3 and the top surface of the workbench 1. The spring 32 is movably sleeved on the outer periphery of the cylindrical rod 31. When demolding is required, the pressing piece 3 is pressed. The pressing piece 3 drives the cylindrical rod 31 to move. The cooperation between the pressing piece 3 and the workbench 1 compresses the spring 32. After demolding is completed, the pressing piece 3 is released. The spring 32 uses its elastic force to restore the pressing piece 3 to its original position. The pressing piece 3 drives the cylindrical rod 31 to return to its original position, facilitating subsequent demolding.

[0029] It should also be noted that cylindrical air cylinders 34 are arranged on both sides of the workbench 1. A third connecting pipe 35 is fixedly connected and communicated with the bottom of the cylindrical air cylinder 34. The bottom end of the third connecting pipe 35 is fixedly connected and communicated with the top surface of the air storage box 2. A spring 32 is fixedly connected to the bottom end of the cylindrical rod 31. A piston push plate 33 is fixedly connected to the bottom surface of the spring 32. The spring 32 and the piston push plate 33 are slidably connected inside the cylindrical air cylinder 34. When the cylindrical rod 31 moves, it drives the piston push plate 33 to move. The piston push plate 33 moves to press the air inside the cylindrical air cylinder 34 into the air storage box 2. The air in the air storage box 2 moves towards the pneumatic telescopic rod 24, so that the pneumatic telescopic rod 24 pushes up the push plate 25, and the push plate 25 pushes out the refrigerator inner liner to complete demolding.

Claims

1. An opening mechanism for a plastic suction mold of a refrigerator door inner liner, comprising a workbench (1), wherein a plastic injection groove (11) is formed in the middle of the top surface of the workbench (1), and it is characterized in that: On both sides of the bottom of the workbench (1), there are air storage boxes (2). A second connecting pipe (23) is fixedly connected and communicated with the side wall of the air storage box (2). The end of the second connecting pipe (23) is fixedly connected and communicated with the bottom of the pneumatic telescopic rod (24). The pneumatic telescopic rod (24) is fixedly arranged at the bottom of the workbench (1). The top end of the pneumatic telescopic rod (24) is fixedly connected with a push plate (25), and the push plate (25) is parallel to the bottom surface of the injection molding groove (11). On both sides of the inner wall of the injection molding groove (11), there are air bags (22). A first connecting pipe (21) is fixedly connected and communicated with the top surface of the air storage box (2). The top end of the first connecting pipe (21) is fixedly connected and communicated with the side wall of the air bag (22).

2. The opening mechanism of a refrigerator door inner liner thermoforming mold according to claim 1, characterized in that: On the top surface of the workbench (1), a plurality of support rods (4) are fixedly connected. The top ends of the support rods (4) are fixedly connected with a top plate (41). In the middle of the top surface of the top plate (41), an electric cylinder (42) is fixedly connected. A piston rod (43) is slidably connected to the bottom surface of the electric cylinder (42). The bottom end of the piston rod (43) is fixedly connected with a pressing plate (44).

3. The opening mechanism of a refrigerator door inner liner thermoforming mold according to claim 1, characterized in that: On both sides of the workbench (1), cylindrical rods (31) are slidably arranged. The top ends of the cylindrical rods (31) are fixedly connected with pressing pieces (3). A spring (32) is fixedly connected between the bottom surface of the pressing piece (3) and the top surface of the workbench (1). The spring (32) is movably sleeved on the outer circumference of the cylindrical rod (31).

4. The opening mechanism of a thermoforming mold for the inner liner of a refrigerator door according to claim 3, characterized in that: On both sides of the workbench (1), there are cylindrical air cylinders (34). A third connecting pipe (35) is fixedly connected and communicated with the bottom of the cylindrical air cylinder (34). The bottom end of the third connecting pipe (35) is fixedly connected and communicated with the top surface of the air storage box (2). The bottom end of the cylindrical rod (31) is fixedly connected with a spring (32). The bottom surface of the spring (32) is fixedly connected with a piston push plate (33). The spring (32) and the piston push plate (33) are slidably connected inside the cylindrical air cylinder (34).

5. The opening mechanism of a refrigerator door inner liner thermoforming mold according to claim 1, characterized in that: A first electromagnetic valve (26) is arranged on the first connecting pipe (21), and a second electromagnetic valve (27) is arranged on the second connecting pipe (23).

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