PLA meal box hot-pressing forming machine

Abstract

The invention provides a PLA meal box hot-pressing forming machine, and belongs to the field of meal box processing, the PLA meal box hot-pressing forming machine comprises a control table, a first vertical rod, a top plate, a hydraulic push rod, an upper die cavity and a lower die cavity, the first vertical rod is fixedly connected to the top of the control table, the top plate is fixedly connected to the top of the first vertical rod, and the hydraulic push rod is fixedly connected to the top of the top plate; the material returning assembly is located at the top of the control table, the heat dissipation assembly is located at the top of the control table, and the lifting assembly is located at the bottom of the material returning assembly. According to the lunch box shaping device, after lunch boxes are shaped, an electric push rod can be controlled to push a push plate to move through the output end, and when the push plate moves, the lunch boxes located on the surface of the lower mold cavity can be pushed to move, so that the lunch boxes are taken out; the problem that an existing hot-pressing forming machine cannot conveniently take out the shaped PLA meal box from a mold cavity of the hot-pressing forming machine is solved.

Description

Technical Field

[0001] The present invention relates to the field of lunch box processing, and in particular to a PLA lunch box hot pressing molding machine. Background Art

[0002] PLA lunch boxes are primarily made from renewable plant resources like corn, sugarcane, and cassava, reducing fossil fuel consumption during production. Under natural composting conditions, microorganisms typically decompose them into carbon dioxide and water within 3-12 months, leaving no residual white pollution and forming a closed-loop carbon cycle, theoretically achieving "zero carbon emissions." PLA lunch boxes are primarily manufactured through hot pressing.

[0003] After the PLA lunch box is formed using existing thermoforming machines, it is primarily removed manually. However, since residual heat remains on the surface of the finished lunch box after processing, manual removal can easily cause burns, hindering subsequent removal. Solving these problems has become a pressing issue for those skilled in the art. Summary of the Invention

[0004] In order to make up for the above shortcomings, the present invention provides a PLA lunch box thermoforming machine, which aims to solve the problem that the existing thermoforming machine cannot conveniently remove the completed PLA lunch box from the mold cavity of the thermoforming machine.

[0005] The present invention is achieved in that:

[0006] The present invention provides a PLA lunch box thermoforming machine, comprising a console, a first vertical pole, a top plate, a hydraulic push rod, an upper mold cavity, and a lower mold cavity, wherein the first vertical pole is fixedly connected to the top of the console, the top plate is fixedly connected to the top of the first vertical pole, the hydraulic push rod is fixedly connected to the top of the top plate, the upper mold cavity is slidably connected to the outer wall of the first vertical pole, the lower mold cavity is fixedly connected to the top of the console, the surfaces of the upper mold cavity and the lower mold cavity are both coated with a fluorine-containing coating, and further comprising:

[0007] The material return assembly is located on the top of the console and is used to push the lunch box located on the surface of the lower mold cavity for return.

[0008] The heat dissipation component is located on the top of the console and is used to speed up the heat dissipation efficiency of the lunch box after it is finalized.

[0009] A lifting assembly is located at the bottom of the material return assembly and is used to push the lunch box located on the surface of the lower mold cavity to lift it.

[0010] Preferably, the material return assembly includes a bending plate 1, a frame, an electric push rod, a push plate and a bending plate 2, the bending plate 1 is fixedly connected to the top of the console, the frame is fixedly connected to the top of the bending plate 1, the electric push rod is arranged above the bending plate 1, the push plate is fixedly connected to the output end of the electric push rod, and the bending plate 2 is fixedly connected to the bottom of the push plate.

[0011] Preferably, the electric push rod is located on the surface of the frame and is fixedly connected to the frame, and the push plate is slidably connected to the lower mold cavity.

[0012] By adopting the above technical solution, the bending plate 1 supports the electric push rod through the frame, and the electric push rod can push the push plate to remove the lunch box located on the surface of the lower mold cavity.

[0013] Preferably, the heat dissipation assembly includes a base, an air chamber, a pipe, a fixed plate, a sliding rod and a sealing gasket, the base is fixedly connected to the top of the console, the air chamber is fixedly connected to the top of the base, the pipe is fixedly connected to the output end of the air chamber, the fixed plate is fixedly connected to the outer wall of the bent plate 2, the sliding rod is fixedly connected to the outer wall of the fixed plate, and the sealing gasket is slidably connected to the inside of the air chamber.

[0014] Preferably, the inner diameter of the pipe is smaller than the inner diameter of the air chamber, and the pipe is located at the top of the lower mold cavity.

[0015] By adopting the above technical solution, the air inside the air chamber will be compressed when entering the inside of the pipe, thereby increasing the air flow rate. The air force ejected through the pipe can assist in dissipating the heat of the formed lunch box.

[0016] Preferably, the end of the sliding rod away from the fixed plate passes through the outer wall of the air bin and extends to the interior of the air bin, the sliding rod is slidably connected to the inner wall of the air bin, and the end of the sliding rod extending to the interior of the air bin is fixedly connected to the sealing gasket.

[0017] By adopting the above technical solution, when the push plate pushes the slide rod to move through the bent plate 2 and the fixed plate, the slide rod pushes the sealing gasket to compress the air inside the air chamber, and discharges it through the pipe after compression.

[0018] Preferably, the lifting assembly includes a second vertical pole, a retaining ring, a spring push rod, a retaining plate, an air push pad, a support plate, a bent rod, a lifting rod, a lifting plate and a lifting pad. The second vertical pole is fixedly connected to the bottom of the second bent plate, the retaining ring is fixedly connected to the bottom end of the second vertical pole, the spring push rod is arranged below the second vertical pole, the air push pad is fixedly connected to the output end of the spring push rod, the support plate is fixedly connected to the inner wall of the console, the bent rod is fixedly connected to the top of the support plate, the lifting rod is arranged inside the bent rod, the lifting plate is fixedly connected to the top of the lifting rod, and the lifting pad is arranged inside the lower mold cavity.

[0019] Preferably, a slot is provided inside the retaining ring, the spring push rod passes through the retaining ring and extends to the outside of the retaining ring, the clamping plate is engaged with the slot inside the retaining ring, the output end of the spring push rod passes through the console and the bent rod and extends to the inside of the bent rod, the air push cushion is located inside the bent rod, and the output end of the spring push rod and the air push cushion are both slidably connected to the bent rod.

[0020] By adopting the above technical solution, when the vertical pole 2 moves under the drive of the push plate and the bending plate 2, the spring push rod can be pushed to move through the clamping ring and the clamping plate. When the spring push rod moves, the air inside the bending pole can be compressed by pushing the air cushion.

[0021] Preferably, the top end of the lifting rod passes through the bent rod and extends to the outside of the bent rod, the lifting rod is slidingly connected to the bent rod, the lifting plate passes through the console and the lower mold cavity, and is fixedly connected to the lifting pad located inside the lower mold cavity, and the lifting pad is slidingly connected to the lower mold cavity.

[0022] By adopting the above technical solution, the lifting rod will push the lifting pad to move through the lifting plate under the action of the air pressure inside the bent rod, thereby pushing out the lunch box located inside the lower mold cavity.

[0023] The beneficial effects of the present invention are:

[0024] 1. After the lunch box is shaped, the electric push rod can be controlled to push the push plate through the output end to move. When the push plate moves, it will push the lunch box located on the surface of the lower mold cavity to move, thereby completing the removal of the lunch box. This solves the problem that the existing hot pressing molding machine cannot conveniently remove the shaped PLA lunch box from the mold cavity of the hot pressing molding machine.

[0025] 2. When the push plate moves, it will compress the air inside the air chamber through the fixed plate, sliding rod and sealing gasket, and blow it out through the pipe, thereby increasing the heat dissipation rate of the lunch box and making it easier for the operator to handle the lunch box later.

[0026] 3. When the push plate moves, it will push the air cushion to move inside the bent rod through the vertical rod 2 and the spring push rod, so that the lifting rod can push the shaped lunch box out of the lower mold cavity through the lifting plate and the lifting pad under the action of air pressure, making it convenient for the heat dissipation component to dissipate heat for the lunch box, and at the same time making it convenient for the material return component to push the lunch box to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of a PLA lunch box thermoforming machine provided by an embodiment of the present invention;

[0029] Figure 2 This is a schematic structural diagram of a PLA lunch box thermoforming machine return assembly provided by an embodiment of the present invention;

[0030] Figure 3 This is a partial schematic diagram of the structure of a material return assembly of a PLA lunch box thermoforming machine provided by an embodiment of the present invention;

[0031] Figure 4 This is a schematic structural diagram of a heat dissipation component of a PLA lunch box thermoforming machine provided by an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the internal structure of an air chamber of a PLA lunch box thermoforming machine provided by an embodiment of the present invention;

[0033] Figure 6 This is a partial schematic diagram of the lifting component structure of a PLA lunch box thermoforming machine provided by an embodiment of the present invention;

[0034] Figure 7 This invention Figure 6 A schematic diagram of the structure at center A;

[0035] Figure 8 The figure is a schematic diagram of the internal structure of a PLA lunch box thermoforming machine console provided by an embodiment of the present invention.

[0036] In the figure: 1. Control console; 2. Vertical pole 1; 3. Top plate; 4. Hydraulic push rod; 5. Upper mold cavity; 6. Lower mold cavity; 7. Material stripping assembly; 701. Bending plate 1; 702. Frame; 703. Electric push rod; 704. Push plate; 705. Bending plate 2; 8. Heat dissipation assembly; 801. Base; 802. Air chamber; 803. Pipeline; 804. Fixed plate; 805. Sliding rod; 806. Sealing gasket; 9. Lifting assembly; 901. Vertical pole 2; 902. Retaining ring; 903. Spring push rod; 904. Clamping plate; 905. Air push pad; 906. Support plate; 907. Bending rod; 908. Lifting rod; 909. Lifting plate; 910. Lifting pad. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Reference Figures 1-8 A PLA lunch box thermoforming machine includes a console 1, a vertical rod 2, a top plate 3, a hydraulic push rod 4, an upper mold cavity 5, and a lower mold cavity 6. The vertical rod 2 is fixedly connected to the top of the console 1, the top plate 3 is fixedly connected to the top of the vertical rod 2, the hydraulic push rod 4 is fixedly connected to the top of the top plate 3, the upper mold cavity 5 is slidably connected to the outer wall of the vertical rod 2, and the lower mold cavity 6 is fixedly connected to the top of the console 1. The surfaces of the upper mold cavity 5 and the lower mold cavity 6 are both coated with a fluorine-containing coating. The machine also includes:

[0039] The material return assembly 7 is located at the top of the console 1 and is used to push the lunch box located on the surface of the lower mold cavity 6 for return.

[0040] The heat dissipation component 8 is located on the top of the console 1 and is used to speed up the heat dissipation efficiency of the lunch box after it is shaped.

[0041] The lifting assembly 9 is located at the bottom of the material return assembly 7, and the lifting assembly 9 is used to push the lunch box located on the surface of the lower mold cavity 6 to lift it.

[0042] The material return assembly 7 includes a bending plate 1 701, a frame 702, an electric push rod 703, a push plate 704 and a bending plate 2 705. The bending plate 1 701 is fixedly connected to the top of the console 1, the frame 702 is fixedly connected to the top of the bending plate 1 701, the electric push rod 703 is arranged above the bending plate 1 701, the push plate 704 is fixedly connected to the output end of the electric push rod 703, and the bending plate 2 705 is fixedly connected to the bottom of the push plate 704.

[0043] It should be noted that the electric push rod 703 is located on the surface of the frame 702 and is fixedly connected to the frame 702. The bent plate 701 supports the electric push rod 703 through the frame 702. The push plate 704 is slidingly connected to the lower mold cavity 6. The electric push rod 703 can push the push plate 704 to return the lunch box located on the surface of the lower mold cavity 6.

[0044] After the lunch box is shaped, the electric push rod 703 can be controlled to push the push plate 704 through the output end to move. When the push plate 704 moves, it will push the lunch box located on the surface of the lower mold cavity 6 to move, thereby completing the removal of the lunch box, solving the problem that the existing hot pressing molding machine cannot conveniently remove the PLA lunch box after shaping from the mold cavity of the hot pressing molding machine.

[0045] After completing the hot pressing of the lunch box, start the electric push rod 703. When the electric push rod 703 is running, the lunch box will be pushed out of the lower mold cavity 6, and the output end of the electric push rod 703 will push the push plate 704 to move until the push plate 704 pushes the lunch box to the specified position. Then the electric push rod 703 can be controlled to reset, thereby completing the material return operation of the lunch box.

[0046] The heat dissipation assembly 8 includes a base 801, an air chamber 802, a pipe 803, a fixed plate 804, a sliding rod 805 and a sealing gasket 806. The base 801 is fixedly connected to the top of the console 1, the air chamber 802 is fixedly connected to the top of the base 801, the pipe 803 is fixedly connected to the output end of the air chamber 802, the fixed plate 804 is fixedly connected to the outer wall of the bent plate 2 705, the sliding rod 805 is fixedly connected to the outer wall of the fixed plate 804, and the sealing gasket 806 is slidably connected to the inside of the air chamber 802.

[0047] It should be noted that: the inner diameter of the pipe 803 is smaller than the inner diameter of the air bin 802. The air inside the air bin 802 will be compressed when entering the pipe 803, thereby increasing the air flow rate. The pipe 803 is located at the top of the lower mold cavity 6. The air force ejected through the pipe 803 can assist in dissipating the heat of the formed lunch box. The end of the slide rod 805 away from the fixed plate 804 penetrates the outer wall of the air bin 802 and extends to the interior of the air bin 802. The slide rod 805 is slidably connected to the inner wall of the air bin 802 that is penetrated. The end of the slide rod 805 extending to the interior of the air bin 802 is fixedly connected to the sealing gasket 806. When the push plate 704 pushes the slide rod 805 to move through the bent plate 2 705 and the fixed plate 804, the slide rod 805 will push the sealing gasket 806 to compress the air inside the air bin 802, and discharge it through the pipe 803 after compression.

[0048] When the push plate 704 moves, it compresses the air inside the air chamber 802 through the fixed plate 804, the sliding rod 805 and the sealing gasket 806, and blows it out through the pipe 803, thereby increasing the heat dissipation rate of the lunch box and facilitating the operator to perform subsequent processing of the lunch box.

[0049] After the electric push rod 703 is started, the push plate 704 pushes the slide rod 805 to move through the bent plate 2 705 and the fixed plate 804, so that the slide rod 805 pushes the sealing gasket 806 to move inside the air bin 802, thereby pushing the air inside the air bin 802 into the inside of the pipe 803 and being discharged after being compressed. The discharged compressed air will dissipate heat for the lunch box pushed out of the lower mold cavity 6, further ensuring the shaping effect of the lunch box.

[0050] The lifting assembly 9 includes a vertical rod 901, a retaining ring 902, a spring push rod 903, a clamping plate 904, an air push pad 905, a support plate 906, a bent rod 907, a lifting rod 908, a lifting plate 909 and a lifting pad 910. The vertical rod 901 is fixedly connected to the bottom of the bent plate 705, the retaining ring 902 is fixedly connected to the bottom end of the vertical rod 901, the spring push rod 903 is arranged below the vertical rod 901, the air push pad 905 is fixedly connected to the output end of the spring push rod 903, the support plate 906 is fixedly connected to the inner wall of the console 1, the bent rod 907 is fixedly connected to the top of the support plate 906, the lifting rod 908 is arranged inside the bent rod 907, the lifting plate 909 is fixedly connected to the top of the lifting rod 908, and the lifting pad 910 is arranged inside the lower mold cavity 6.

[0051] It should be noted that: a groove is provided inside the snap ring 902, and the spring push rod 903 passes through the snap ring 902 and extends to the outside of the snap ring 902, and the clamping plate 904 is clamped with the groove inside the snap ring 902. When the vertical rod 2 901 moves under the drive of the push plate 704 and the bent plate 2 705, the spring push rod 903 can be pushed to move by the snap ring 902 and the clamping plate 904. The output end of the spring push rod 903 passes through the console 1 and the bent rod 907 and extends to the inside of the bent rod 907. The push air cushion 905 is located inside the bent rod 907. The output end of the spring push rod 903 and the push air cushion 905 are both slidable with the bent rod 907. Dynamic connection, when the spring push rod 903 moves, the air inside the bent rod 907 can be compressed by pushing the air pad 905, and the top of the lifting rod 908 passes through the bent rod 907 and extends to the outside of the bent rod 907. The lifting rod 908 is slidingly connected to the bent rod 907, and the lifting plate 909 passes through the console 1 and the lower mold cavity 6, and is fixedly connected to the lifting pad 910 located inside the lower mold cavity 6. The lifting pad 910 is slidingly connected to the lower mold cavity 6. The lifting rod 908 will push the lifting pad 910 to move through the lifting plate 909 under the action of the air pressure inside the bent rod 907, thereby pushing out the lunch box located inside the lower mold cavity 6.

[0052] When the push plate 704 moves, it will push the air push cushion 905 to move inside the bent rod 907 through the vertical rod 2 901 and the spring push rod 903, so that the lifting rod 908, under the action of air pressure, will push the shaped lunch box out of the lower mold cavity 6 through the lifting plate 909 and the lifting pad 910, making it convenient for the heat dissipation component 8 to dissipate heat for the lunch box, and at the same time making it convenient for the material return component 7 to push the lunch box to move.

[0053] After the electric push rod 703 is started, the spring push rod 903 is pushed to move through the bent plate 2 705, the vertical rod 2 901 and the retaining ring 902, so that the air push pad 905 slides on the inner wall of the bent rod 907 under the drive of the spring push rod 903, and cooperates with the lifting rod 908 to compress the air inside the bent rod 907. At this time, the lifting rod 908 will be driven by the compressed air inside the bent rod 907, and push the lunch box to be lifted through the lifting plate 909 and the lifting pad 910, and separate from the lower mold cavity 6, thereby facilitating subsequent heat dissipation and material return operations.

[0054] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A PLA lunch box hot press molding machine, comprising a control console (1), a vertical pole (2), a top plate (3), a hydraulic push rod (4), an upper mold cavity (5) and a lower mold cavity (6), wherein the vertical pole (2) is fixedly connected to the top of the control console (1), the top plate (3) is fixedly connected to the top of the vertical pole (2), the hydraulic push rod (4) is fixedly connected to the top of the top plate (3), the upper mold cavity (5) is slidably connected to the outer wall of the vertical pole (2), the lower mold cavity (6) is fixedly connected to the top of the control console (1), and the surfaces of the upper mold cavity (5) and the lower mold cavity (6) are both coated with a fluorine-containing coating, characterized in that: Also includes: A material return assembly (7), the material return assembly (7) is located on the top of the console (1), and the material return assembly (7) is used to push the lunch box located on the surface of the lower mold cavity (6) to return the material; A heat dissipation component (8), the heat dissipation component (8) is located on the top of the console (1), and the heat dissipation component (8) is used to accelerate the heat dissipation efficiency of the lunch box after it is formed; A lifting assembly (9) is located at the bottom of the material return assembly (7), and the lifting assembly (9) is used to push the lunch box located on the surface of the lower mold cavity (6) to lift it.

2. The PLA lunch box thermoforming machine according to claim 1, characterized in that: The material-removing assembly (7) comprises a bending plate 1 (701), a frame (702), an electric push rod (703), a push plate (704) and a bending plate 2 (705), wherein the bending plate 1 (701) is fixedly connected to the top of the console (1), the frame (702) is fixedly connected to the top of the bending plate 1 (701), the electric push rod (703) is arranged above the bending plate 1 (701), the push plate (704) is fixedly connected to the output end of the electric push rod (703), and the bending plate 2 (705) is fixedly connected to the bottom of the push plate (704).

3. The PLA lunch box thermoforming machine according to claim 2, characterized in that: The electric push rod (703) is located on the surface of the frame (702) and is fixedly connected to the frame (702), and the push plate (704) is slidably connected to the lower mold cavity (6).

4. The PLA lunch box thermoforming machine according to claim 3, characterized in that: The heat dissipation assembly (8) comprises a base (801), an air chamber (802), a pipe (803), a fixing plate (804), a sliding rod (805) and a sealing gasket (806), wherein the base (801) is fixedly connected to the top of the console (1), the air chamber (802) is fixedly connected to the top of the base (801), the pipe (803) is fixedly connected to the output end of the air chamber (802), the fixing plate (804) is fixedly connected to the outer wall of the second bent plate (705), the sliding rod (805) is fixedly connected to the outer wall of the fixing plate (804), and the sealing gasket (806) is slidably connected to the inside of the air chamber (802).

5. The PLA lunch box thermoforming machine according to claim 4, characterized in that: The inner diameter of the pipe (803) is smaller than the inner diameter of the air chamber (802), and the pipe (803) is located at the top of the lower mold cavity (6).

6. The PLA lunch box thermoforming machine according to claim 5, characterized in that: One end of the sliding rod (805) away from the fixed plate (804) passes through the outer wall of the gas bin (802) and extends to the interior of the gas bin (802). The sliding rod (805) is slidably connected to the inner wall of the gas bin (802) through which it passes. The end of the sliding rod (805) extending to the interior of the gas bin (802) is fixedly connected to the sealing gasket (806).

7. The PLA lunch box thermoforming machine according to claim 6, characterized in that: The lifting assembly (9) includes a second vertical pole (901), a snap ring (902), a spring push rod (903), a clamping plate (904), an air push pad (905), a support plate (906), a bent rod (907), a lifting rod (908), a lifting plate (909) and a lifting pad (910), wherein the second vertical pole (901) is fixedly connected to the bottom of the second bent plate (705), the snap ring (902) is fixedly connected to the bottom end of the second vertical pole (901), and the spring push rod (903) is arranged Below the second vertical pole (901), the air push pad (905) is fixedly connected to the output end of the spring push rod (903), the support plate (906) is fixedly connected to the inner wall of the console (1), the bent rod (907) is fixedly connected to the top of the support plate (906), the lifting rod (908) is arranged inside the bent rod (907), the lifting plate (909) is fixedly connected to the top of the lifting rod (908), and the lifting pad (910) is arranged inside the lower mold cavity (6).

8. The PLA lunch box thermoforming machine according to claim 7, characterized in that: A slot is provided inside the snap ring (902), the spring push rod (903) passes through the snap ring (902) and extends to the outside of the snap ring (902), the clamping plate (904) is engaged with the slot inside the snap ring (902), the output end of the spring push rod (903) passes through the console (1) and the bent rod (907) and extends to the inside of the bent rod (907), the air push pad (905) is located inside the bent rod (907), and the output end of the spring push rod (903) and the air push pad (905) are both slidably connected to the bent rod (907).

9. The PLA lunch box thermoforming machine according to claim 8, characterized in that: The top end of the lifting rod (908) passes through the bent rod (907) and extends to the outside of the bent rod (907). The lifting rod (908) is slidably connected to the bent rod (907). The lifting plate (909) passes through the console (1) and the lower mold cavity (6) and is fixedly connected to the lifting pad (910) located inside the lower mold cavity (6). The lifting pad (910) is slidably connected to the lower mold cavity (6).

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