Plastic uptake forming device for degradable plastic plate

Abstract

The invention discloses a plastic uptake forming device capable of degrading a plastic plate, and belongs to the technical field of plastic processing equipment.The plastic uptake forming device comprises a plastic uptake assembly, the plastic uptake assembly comprises a mounting shell, a plastic uptake barrel is arranged in the mounting shell, a net plate is slidably connected into the plastic uptake barrel, and a mold is mounted on the upper side wall of the net plate; two air cylinders are fixedly connected between the lower inner wall of the plastic uptake barrel and the net plate, an air suction pipe is fixedly connected to the lower end of the plastic uptake barrel, two communicating pipes are communicated between the air suction pipe and the lower side wall of the plastic uptake barrel, and an air distributing cylinder is slidably connected into the air suction pipe. The vacuum pump does not extract air in the plastic suction cylinder any more, outside air is extracted, the extracted air is blown to the surface of the plastic workpiece through the air distribution box, in this way, the cooling efficiency of the plastic workpiece is effectively improved, cooling equipment does not need to be additionally arranged, energy consumption is remarkably reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic processing equipment, and specifically to a thermoforming device for degradable plastic plates. Background Technique

[0002] Thermoforming is a plastic processing technology. After heating a thermoplastic sheet to a softened state, it is made to adhere to the surface of a mold by means of vacuum suction force, and a product with a specific shape is obtained after cooling and shaping. The specific process includes: fixing a plastic sheet (such as PVC, PET, etc.) on a heating device, moving it above the mold after softening, evacuating the air to make the sheet tightly adhere to the contour of the mold, demolding after curing by a cooling system, and trimming the excess edge material. This technology has low cost and high efficiency and is widely used in the mass production of products such as food packaging, electronic product casings, and medical device trays.

[0003] A Chinese patent discloses an adjustable thermoforming packaging machine (authorization publication number CN118721685B). This patent includes a bearing seat, on which a frame is installed. A hydraulic cylinder is installed on the frame. The telescopic end of the hydraulic cylinder faces downward and is equipped with a connecting rod. A upper pressing plate is sleeved at the bottom end of the connecting rod. It further includes: a forming mechanism, including a mold box installed on the bearing seat. The mold box is located below the upper pressing plate and has an open top. The open end of the mold box is used to place a female mold, and the top of the female mold is used to place the heated thermoplastic material. An air suction hole is opened at the bottom end of the female mold; a cooling mechanism, installed on the bearing seat, which is used to convey a flowing cooling medium into the mold box.

[0004] In the thermoforming process, in order to improve the plastic processing efficiency and achieve full-process automation, existing thermoforming machines usually configure auxiliary mechanisms, such as the cooling mechanism mentioned in the above patent. Especially when processing degradable plastic plates, such as polylactic acid materials, even after the demolding process, further cooling treatment is still required. These auxiliary devices work together to improve the overall forming efficiency of plastics. However, most of the current automated thermoforming machines on the market have the problem of low integration, which makes the existing thermoforming machines face many disadvantages, such as large equipment footprint, high production cost, and high energy consumption. For this reason, we propose a thermoforming device for degradable plastic plates. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermoforming device for degradable plastic plates to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A thermoforming device for a degradable plastic sheet, comprising a thermoforming assembly. The thermoforming assembly includes an installation shell, inside which a thermoforming cylinder is arranged. A net plate is slidably connected inside the thermoforming cylinder. A mold is installed on the upper side wall of the net plate. Two air cylinders are fixedly connected between the lower inner wall of the thermoforming cylinder and the net plate. An air suction pipe is fixedly connected to the lower end of the thermoforming cylinder. Two connecting pipes are communicated between the air suction pipe and the lower side wall of the thermoforming cylinder. A gas distribution cylinder is slidably connected inside the air suction pipe. A connecting rod is fixedly connected between the gas distribution cylinder and the net plate. An air extraction pipe is communicated with the side wall of the air suction pipe. A vacuum pump is fixedly connected to the lower inner wall of the installation shell, and the air inlet end of the vacuum pump is communicated with the lower end of the air suction pipe. A cooling assembly is communicated with the side wall of the air suction pipe. A rotating assembly is installed on the upper inner wall of the installation shell. A plurality of suction components are fixedly connected to the rotating assembly. An air cut-off assembly is fixedly connected between the end of the air extraction pipe far from the air suction pipe and the suction component. A heating furnace and an upper plate mechanism are respectively fixedly connected to the upper side wall and the left side wall of the installation shell. A collection tank is fixedly connected inside the installation shell; The cooling assembly includes an air extraction port drilled on the air suction pipe. A moving plate is slidably connected inside the air extraction port. A fixed pipe is fixedly connected to the air suction pipe. A conversion pipe is communicated with the fixed pipe. The air outlet end of the vacuum pump is communicated with an air duct, and the air duct is communicated with the conversion pipe.

[0007] As a further scheme of the present invention, a gas distribution valve plug is slidably connected inside the conversion pipe. Two limit ring blocks are fixedly connected inside the conversion pipe, and the gas distribution valve plug is located between the two limit ring blocks. A return spring is fixedly connected between the gas distribution valve plug and the conversion pipe.

[0008] As a further scheme of the present invention, an air inlet pipe and an air outlet pipe are communicated with the conversion pipe. An air inlet cavity and an air outlet cavity are drilled on the gas distribution valve plug. A wind distribution box is fixedly connected to the upper side wall of the installation shell, and the air duct is communicated with the wind distribution box.

[0009] As a further scheme of the present invention, the rotating assembly includes a rotating box rotatably connected to the upper inner wall of the installation shell. A motor is fixedly connected to the upper side wall of the installation shell, and the output end of the motor is fixedly connected to the rotating box.

[0010] As a further scheme of the present invention, two moving plates are slidably connected to the left and right side walls and the front and rear side walls of the rotating box. The two ends of adjacent two moving plates are fixedly connected to the suction component.

[0011] As a further scheme of the present invention, two tension springs are fixedly connected between the plurality of moving plates and the upper inner wall of the rotating box. A magnetic block is fixedly connected to each of the plurality of moving plates. Two electromagnets are fixedly connected to the upper side wall of the installation shell, and the electromagnets are magnetically connected to the magnetic blocks.

[0012] As a further scheme of the present invention, the suction component includes a extraction frame. A plurality of sealing ring blocks are inserted into the lower side wall of the extraction frame. A plurality of insertion pipes are inserted into the plurality of sealing ring blocks. The lower ends of the plurality of insertion pipes are communicated with suction cups.

[0013] As a further solution of the present invention, the same synchronization frame is fixedly connected between multiple intubation tubes, and the synchronization frame is fixedly connected to two moving plates. An adjusting tube is communicated with the extraction box.

[0014] As a further solution of the present invention, the air cut-off assembly includes a rotating tube fixedly connected to the lower side wall of the rotating box, and the air extraction tube is inserted into the rotating tube. Two mechanical seals are fixedly connected to the air extraction tube.

[0015] As a further solution of the present invention, an air extraction notch is drilled in the air extraction tube, and the air extraction notch is located between the two mechanical seals. Two sealing strips are fixedly connected between the two mechanical seals.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. After the thermoforming operation is completed, the present invention can use the cylinder to drive the mesh plate to move downward, so that the vacuum pump no longer extracts the air inside the thermoforming cylinder, but instead extracts the external air, and blows the extracted air to the surface of the plastic workpiece through the air distribution box. In this way, the cooling efficiency of the plastic workpiece is effectively improved. This device does not require additional cooling equipment, which not only significantly reduces energy consumption but also improves processing efficiency.

[0017] 2. When in use, through the cooperation of the rotating assembly and the suction assembly, the vacuum pump can use multiple suction assemblies to separately complete the suction operations of the processed plastic workpieces and the unprocessed plastic plates, and through the drive of the rotating box, the transportation of the plastic workpieces can be realized. In addition, the rotating assembly, the suction assembly cooperate with the heating furnace and the upper plate mechanism to achieve the purpose of feeding the plastic plate and heating the plastic plate, further improving processing efficiency.

[0018] 3. When in use, through the setting of the air cut-off assembly, when one of the suction assemblies rotates to a specific angle, the air cut-off assembly will disconnect the connection between the suction assembly and the vacuum pump. At this time, the suction assembly loses suction, and the processed plastic workpiece will fall to the preset position due to gravity, thus smoothly achieving the purpose of discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional perspective view of a thermoforming device for degradable plastic plates; Figure 2 It is a schematic structural diagram inside the thermoforming assembly in a thermoforming device for degradable plastic plates; Figure 3 It is a schematic structural diagram of the cooling assembly and the rotating assembly part in a thermoforming device for degradable plastic plates; Figure 4 It is a schematic structural diagram at the thermoforming assembly in a thermoforming device for degradable plastic plates; Figure 5 is Figure 4 an enlarged view of part A in Figure 6 is Figure 4 an enlarged view of part B in Figure 7 a schematic structural view of the plate moving part in a thermoforming device for degradable plastic sheets; Figure 8 a schematic structural view of the air cut-off component in a thermoforming device for degradable plastic sheets; Figure 9 a schematic structural view of the rotating component in a thermoforming device for degradable plastic sheets; Figure 10 a schematic structural view of the suction component in a thermoforming device for degradable plastic sheets; Figure 11 a state diagram of the cooling component exhausting air during the thermoforming process of a degradable plastic sheet; Figure 12 a state diagram of the cooling component exhausting air during the cooling process of a degradable plastic sheet.

[0020] In the figure: 1. Thermoforming component; 101. Installation shell; 102. Thermoforming cylinder; 103. Mesh plate; 104. Mold; 105. Cylinder; 106. Suction pipe; 107. Connecting pipe; 108. Air distribution cylinder; 109. Connecting rod; 110. Exhaust pipe; 111. Vacuum pump; 2. Cooling component; 201. Air extraction port; 202. Moving plate; 203. Fixed pipe; 204. Conversion pipe; 205. Air distribution valve plug; 206. Limit ring block; 207. Return spring; 208. Intake pipe; 209. Outlet pipe; 210. Intake cavity; 211. Outlet cavity; 212. Air distribution box; 213. Air duct; 3. Rotating component; 301. Rotating box; 302. Motor; 303. Moving plate; 304. Tension spring; 305. Magnet; 306. Electromagnet; 4. Suction component; 401. Extraction frame; 402. Sealing ring block; 403. Insertion pipe; 404. Suction cup; 405. Synchronization frame; 406. Adjusting pipe; 5. Air cut-off component; 501. Rotating pipe; 502. Mechanical seal; 503. Air extraction groove; 504. Sealing strip; 6. Heating furnace; 7. Upper plate mechanism; 8. Collection tank. Specific implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: Please refer to Figures 1 to 7, in an embodiment of the present invention, a thermoforming device for a degradable plastic sheet includes a thermoforming assembly 1. The thermoforming assembly 1 includes a mounting shell 101. Inside the mounting shell 101, there is a thermoforming cylinder 102 fixedly connected above a vacuum pump 111 through an air suction pipe 106. A mesh plate 103 for placing a mold 104 and supporting the plastic sheet is slidably connected inside the thermoforming cylinder 102. The mesh plate 103 is of a breathable structure to help the vacuum pump 111 extract the air below and inside the softened plastic sheet. A mold 104 for thermoforming the plastic sheet is installed on the upper sidewall of the mesh plate 103. Two cylinders 105 for driving the mesh plate 103 to move up and down are fixedly connected between the lower inner wall of the thermoforming cylinder 102 and the lower sidewall of the mesh plate 103. The lower end of the thermoforming cylinder 102 is fixedly connected with an air suction pipe 106 that communicates with the vacuum pump 111 to achieve air extraction. Two connecting pipes 107 are communicated between the sidewall of the air suction pipe 106 and the lower sidewall of the thermoforming cylinder 102. During use, according to the need of the shape of the plastic workpiece, one of the connecting pipes 107 can be communicated with the mold 104 through an air pipe to make the mold 104 generate suction, thereby improving the adhesion between the plastic sheet and the mold 104 and making the plastic workpiece better formed. An air distribution cylinder 108 for changing the air flow channel is slidably connected inside the air suction pipe 106. Sealing rings are fixedly connected to both the upper and lower ends of the air distribution cylinder 108. The bottom of the air distribution cylinder 108 is set to be open, and the top is set to be closed. Air holes matching the connecting pipes 107 are drilled on the sidewall of the air distribution cylinder 108. Two rubber rings are fixedly connected to the sidewall of the air distribution cylinder 108 beside the air holes. The rubber rings abut against the inner wall of the air suction pipe 106 to improve the sealing performance beside the air holes. A connecting rod 109 for driving the air distribution cylinder 108 to move is fixedly connected between the upper end of the air distribution cylinder 108 and the lower sidewall of the mesh plate 103. An air extraction pipe 110 for making the suction assembly 4 generate suction is communicated with the sidewall of the air suction pipe 106. The air extraction pipe 110 is communicated with the vacuum pump 111 through the air suction pipe 106. The air extraction pipe 110 will not be affected by the movement of the air distribution cylinder 108. As long as the vacuum pump 111 is in the startup state, the suction assembly 4 will generate suction through the air extraction pipe 110. The lower inner wall of the mounting shell 101 is fixedly connected with a vacuum pump 111 by bolts. The vacuum pump 111 is provided with an air inlet end for vacuum extraction and an air outlet end for exhaust. The air inlet end of the vacuum pump 111 is communicated and fixed with the lower end of the air suction pipe 106. A cooling assembly 2 for cooling the plastic workpiece is communicated with the sidewall of the air suction pipe 106. A rotating assembly 3 for realizing the conveyance of the plastic sheet is installed on the upper inner wall of the mounting shell 101. A plurality of suction assemblies 4 for sucking the plastic sheet are fixedly connected to the rotating assembly 3. A gas cut-off assembly 5 for enabling the suction assembly 4 to discharge materials is fixedly connected between the end of the air extraction pipe 110 far away from the air suction pipe 106 and the adjustment pipe 406 in the suction assembly 4. A heating furnace 6 for heating the plastic sheet and an upper plate mechanism 7 for conveying the plastic sheet are respectively fixedly connected to the upper sidewall and the left sidewall of the mounting shell 101. The upper plate mechanism 7 is a stepping sheet delivery mechanism.The upper plate mechanism 7 realizes the successive separation and conveyance of sheets through intermittent movement, ensuring that only one sheet is delivered to the target station each time. The structure and principle of the upper plate mechanism 7 are both prior arts and will not be elaborated here. The upper plate mechanism 7 can be freely customized according to actual needs, or a fully automatic upper plate machine of Herui Technology, model HR-AU-250, can be used. It should be noted that the material taking height of the upper plate mechanism 7 needs to be consistent with the processing height of the plastic suction cylinder 102, and a collecting groove 8 for facilitating the taking of plastic workpieces is fixedly connected to the inner side wall of the installation shell 101; The cooling assembly 2 includes an air extraction port 201 drilled in the air suction pipe 106. A moving plate 202 is slidably connected inside the air extraction port 201 in a manner of being clamped by a chute. A fixed pipe 203 is sleeved and fixedly connected to the air suction pipe 106. A conversion pipe 204 is communicated and fixed to the fixed pipe 203. The conversion pipe 204 can be communicated with the upper half of the air extraction port 201. When the air distribution cylinder 108 moves upward, it will drive the moving plate 202 to move upward through friction, so that the moving plate 202 closes the upper half of the air extraction port 201. At this time, the conversion pipe 204 is in a closed state. When the air distribution cylinder 108 moves downward, it will drive the moving plate 202 to move downward, so that the upper half of the air extraction port 201 is opened. At this time, the conversion pipe 204 is communicated with the air suction pipe 106. The air outlet end of the vacuum pump 111 is communicated and fixed with an air pipe 213, and the air pipe 213 is cross-connected and fixed with the conversion pipe 204. A gas distribution valve plug 205 is slidably connected inside the conversion pipe 204, and the gas distribution valve plug 205 is located at the cross intersection of the air pipe 213. Two limit ring blocks 206 for restricting the stroke of the gas distribution valve plug 205 are fixedly connected inside the conversion pipe 204, and the gas distribution valve plug 205 is located between the two limit ring blocks 206. A return spring 207 for resetting the gas distribution valve plug 205 is fixedly connected between the end of the gas distribution valve plug 205 away from the air suction pipe 106 and the inner wall of the end of the conversion pipe 204 away from the air suction pipe 106. An air vent is opened on the inner wall of the end of the conversion pipe 204 away from the air suction pipe 106 to prevent the conversion pipe 204 from generating air pressure and causing the gas distribution valve plug 205 to be unable to move. An air inlet pipe 208 for sucking external air and an air outlet pipe 209 for discharging gas are communicated and fixed to the upper side wall of the conversion pipe 204. An L-shaped air inlet cavity 210 and a T-shaped air outlet cavity 211 are drilled in the gas distribution valve plug 205. When the gas distribution valve plug 205 abuts against the limit ring block 206 close to the air suction pipe 106, the air inlet cavity 210 can be communicated with the air inlet pipe 208. At this time, the air outlet cavity 211 is communicated with the gas distribution valve plug 205. When the gas distribution valve plug 205 abuts against the limit ring block 206 close to the return spring 207, the gas distribution valve plug 205 is communicated with the air outlet pipe 209 through the air outlet cavity 211. A wind distribution box 212 for diverting the blown air is fixedly connected to the upper side wall of the installation shell 101. The wind distribution box 212 is located directly above the plastic suction cylinder 102. The wind distribution box 212 can divert the air flow so that the air can be evenly blown onto the surface of the plastic workpiece. The structure and principle of the wind distribution box 212 are both prior arts and will not be described in detail here. And the air pipe 213 is communicated with the air inlet end of the wind distribution box 212.

[0023] Embodiment 2: Please refer to Figures 7 to 12, on the basis of Embodiment 1, the rotating assembly 3 includes a rotating box 301 rotatably connected to the inner upper wall of the mounting shell 101. A motor 302 is fixedly connected to the upper side wall of the mounting shell 101 by bolts, and the output end of the motor 302 is fixedly connected to the rotating box 301 to enable the motor 302 to drive the rotating box 301 to rotate. Two moving plates 303 are slidably connected to the left and right side walls and the front and rear side walls of the rotating box 301 in a vertical sliding manner by means of opening chutes. The two ends between adjacent two moving plates 303 are fixedly connected to the suction assembly 4. The moving plates 303 slidably connected to the front and rear side walls of the rotating box 301 are convex upward at the intersection of the moving plates 303 on the other side to prevent the moving plates 303 on the other side from contacting each other and affecting their respective vertical movements, while the heights of the other parts of the moving plates 303 are equal. Two tension springs 304 are fixedly connected between the multiple moving plates 303 and the inner upper wall of the rotating box 301, which makes the heights of the multiple suction assemblies 4 equal in the initial state. Magnets 305 for driving the moving plates 303 to move are fixedly connected to the multiple moving plates 303. Two electromagnets 306 are fixedly connected to the upper side wall of the mounting shell 101 by bolts, and the electromagnets 306 and the magnets 305 are magnetically repulsive. When the electromagnets 306 are activated, the magnets 305 and the moving plates 303 can be pushed downward by magnetic repulsive force, so that the moving plates 303 drive the corresponding suction assemblies 4 to move downward. It should be noted that since the electromagnets 306 are arranged on the left and right sides, when the electromagnets 306 are activated, the suction assemblies 4 on the left and right sides are automatically driven to move downward.

[0024] The suction assembly 4 includes a suction box 401. A plurality of sealing ring blocks 402 are inserted into the lower side wall of the suction box 401. A sealing structure is arranged on the inner side wall of the sealing ring blocks 402. A plurality of insertion tubes 403 are inserted into the plurality of sealing ring blocks 402, so that when the insertion tubes 403 move up and down, it will not cause the outside air to enter due to negative pressure. The lower ends of the plurality of insertion tubes 403 are connected and fixed to suction cups 404 for sucking the surface of the plastic plate. The same synchronous frame 405 is fixedly connected between the plurality of insertion tubes 403. The synchronous frame 405 can control the plurality of insertion tubes 403 to move up and down simultaneously through the moving plates 303 to help the plurality of suction cups 404 better fit the surface of the plastic plate, and the side wall of the synchronous frame 405 is fixedly connected to two adjacent moving plates 303. An adjustment tube 406 is communicated with the suction box 401.

[0025] The air-breaking component 5 includes a rotating pipe 501 fixedly connected to the lower side wall of the rotating box 301, and one end of the air extraction pipe 110 far from the air suction pipe 106 is inserted into the interior of the rotating pipe 501. Two mechanical seals 502 are fixedly connected to the air extraction pipe 110. An air extraction notch 503 is formed in the air extraction pipe 110, and the width of the air extraction notch 503 occupies three-quarters of the circumference of the air extraction pipe 110. The remaining unformed part of the air extraction pipe 110 faces the collection tank 8. The air extraction notch 503 is located between the two mechanical seals 502. Two sealing strips 504 are fixedly connected between the two mechanical seals 502, and the sealing strips 504 are fixedly connected to the remaining unformed side wall of the air extraction pipe 110.

[0026] The working principle of the present invention is: When the present invention is in use, the staff first starts the vacuum pump 111. Since the air suction pipe 106 is communicated with the air extraction pipe 110, after the vacuum pump 111 is started, the air extraction pipe 110 generates suction through the air suction pipe 106. The air extraction pipe 110 makes the adjustment pipe 406 communicated with the air extraction notch 503 generate suction through the air-breaking component 5, so that the three extraction frames 401 generate suction, and finally the suction cups 404 generate suction. Then the staff starts the electromagnet 306, so that the electromagnet 306 can drive the moving plate 303 to move downward through the repulsive force with the magnetic block 305. Both ends of the moving plate 303 drive a plurality of insertion pipes 403 on the left and right sides to move downward simultaneously through the synchronous frame 405. The insertion pipes 403 drive the suction cups 404 to move downward. The plurality of suction cups 404 on the left suction component 4 can suck the plastic plates on the upper plate mechanism 7. The suction cups 404 on the right press the plastic plates that have been sucked and softened by the heating furnace 6 onto the upper end of the plastic suction cylinder 102 for plastic suction molding processing. During the thermoforming process, first, the air cylinder 105 is activated to drive the screen plate 103 and the mold 104 upward, so that the mold 104 pushes the softened plastic sheet. When the screen plate 103 moves to the highest point, the screen plate 103 pulls the air distribution cylinder 108 through the connecting rod 109, so that the air holes of the air distribution cylinder 108 are communicated with the connecting pipe 107. At this time, the vacuum pump 111 starts to extract the air inside the thermoforming cylinder 102 through the suction pipe 106, the air distribution cylinder 108 and the connecting pipe 107. Under the action of the negative pressure inside the thermoforming cylinder 102, the softened plastic sheet gradually adheres to the mold 104 and begins to form. After the plastic surface is formed, the air cylinder 105 drives the screen plate 103 downward to separate the plastic workpiece from the mold 104. When the screen plate 103 moves downward, it will push the air distribution cylinder 108 downward through the connecting rod 109. At this time, the air distribution cylinder 108 will drive the moving plate 202 downward under the action of friction. At this time, the upper half of the air extraction port 201 is opened. When the air holes of the air distribution cylinder 108 correspond to the air extraction port 201, the conversion pipe 204 generates negative pressure, causing the air distribution valve plug 205 to be adsorbed and move. When the air distribution valve plug 205 abuts against the limit ring block 206 close to the suction pipe 106, the air inlet cavity 210 can be communicated with the air inlet pipe 208, and the air outlet cavity 211 is communicated with the air distribution valve plug 205. At this time, the outside air enters through the air inlet pipe 208, and the air discharged by the vacuum pump 111 is blown to the surface of the plastic workpiece through the air duct 213 and the air distribution box 212, as Figure 12 shown, which plays a further cooling role, making the polylactic acid molecular chains arranged more regularly, helping to improve the mechanical properties such as the strength and hardness of the product. Previously, the gas discharged by the vacuum pump 111 during thermoforming was discharged through the air duct 213, the air outlet cavity 211 and the air outlet pipe 209, as Figure 1 shown; After the next plastic sheet is heated, the electromagnet 306 is powered off and the motor 302 is started. After the electromagnet 306 is powered off, the moving plate 303 resets under the action of the tension spring 304. The moving plate 303 will drive the inserting pipe 403 and the sucked plastic part upward through the synchronous frame 405. At this time, the inserting pipe 403 on the left will suck up the plastic sheet on the upper plate mechanism 7 again, and the multiple inserting pipes 403 on the right will also suck up the processed plastic sheet. As the motor 302 drives the rotating box 301 to rotate 90 degrees, the rotating pipe 501 will also rotate 90 degrees. At this time, the adjusting pipe 406 corresponding to the processed plastic sheet sucked on the right originally will be rotated to the side away from the air extraction slot 503, resulting in no suction force generated by the suction cup 404 on this side, and thus unable to suck the plastic workpiece, prompting the plastic workpiece to fall into the collection tank 8, achieving the purpose of automatic blanking. At the same time, the suction assembly 4 that sucked the plastic sheet of the upper plate mechanism 7 on the left before will be rotated to the lower side of the heating furnace 6, and the plastic sheet is heated by the heating furnace 6. Finally, through the rotation of multiple suction assemblies 4, the entire processing process of the plastic sheet from material taking, heating, thermoforming, cooling to discharging is cycled.

[0027] As described above, it is only the preferred specific implementation manner of the present invention. However, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention when making equivalent replacements or changes according to the technical solution and inventive concept of the present invention.

Claims

1. A thermoforming device for a degradable plastic sheet, comprising a thermoforming assembly (1), characterized in that, The plastic suction component (1) includes an installation shell (101). Inside the installation shell (101), there is a plastic suction cylinder (102). A net plate (103) is slidably connected inside the plastic suction cylinder (102). A mold (104) is installed on the upper side wall of the net plate (103). Two air cylinders (105) are fixedly connected between the lower inner wall of the plastic suction cylinder (102) and the net plate (103). The lower end of the plastic suction cylinder (102) is fixedly connected with an air suction pipe (106). Two connecting pipes (107) are communicated between the air suction pipe (106) and the lower side wall of the plastic suction cylinder (102). A gas distribution cylinder (108) is slidably connected inside the air suction pipe (106). A connecting rod (109) is fixedly connected between the gas distribution cylinder (108) and the net plate (103). An air extraction pipe (110) is communicated with the side wall of the air suction pipe (106). The lower inner wall of the installation shell (101) is fixedly connected with a vacuum pump (111), and the air inlet end of the vacuum pump (111) is communicated with the lower end of the air suction pipe (106). A cooling component (2) is communicated with the side wall of the air suction pipe (106). A rotating component (3) is installed on the upper inner wall of the installation shell (101). A plurality of suction components (4) are fixedly connected to the rotating component (3). An air cut-off component (5) is fixedly connected between the end of the air extraction pipe (110) far away from the air suction pipe (106) and the suction component (4). A heating furnace (6) and an upper plate mechanism (7) are respectively fixedly connected to the upper side wall and the left side wall of the installation shell (101). A collection tank (8) is fixedly connected inside the installation shell (101); The cooling component (2) includes an air extraction port (201) drilled on the air suction pipe (106). A moving plate (202) is slidably connected inside the air extraction port (201). A fixed pipe (203) is fixedly connected to the air suction pipe (106). A conversion pipe (204) is communicated with the fixed pipe (203). The air outlet end of the vacuum pump (111) is communicated with an air pipe (213), and the air pipe (213) is communicated with the conversion pipe (204).

2. The thermoforming device for a degradable plastic sheet according to claim 1, wherein, A gas distribution valve plug (205) is slidably connected inside the conversion pipe (204). Two limiting ring blocks (206) are fixedly connected inside the conversion pipe (204), and the gas distribution valve plug (205) is located between the two limiting ring blocks (206). A return spring (207) is fixedly connected between the gas distribution valve plug (205) and the conversion pipe (204).

3. The thermoforming device for a degradable plastic sheet according to claim 2, characterized in that, An air inlet pipe (208) and an air outlet pipe (209) are communicated with the conversion pipe (204). An air inlet cavity (210) and an air outlet cavity (211) are drilled on the gas distribution valve plug (205). A wind distribution box (212) is fixedly connected to the upper side wall of the installation shell (101), and the air pipe (213) is communicated with the wind distribution box (212).

4. The thermoforming device for a degradable plastic sheet according to claim 1, wherein, The rotating component (3) includes a rotating box (301) rotatably connected to the upper inner wall of the installation shell (101). A motor (302) is fixedly connected to the upper side wall of the installation shell (101), and the output end of the motor (302) is fixedly connected to the rotating box (301).

5. The thermoforming device for a degradable plastic sheet according to claim 4, characterized in that, Two moving plates (303) are slidably connected to the left and right side walls and the front and rear side walls of the rotating box (301), and both ends of two adjacent moving plates (303) are fixedly connected to the suction assembly (4).

6. The thermoforming device for a degradable plastic sheet according to claim 5, wherein, Two tension springs (304) are fixedly connected between the plurality of moving plates (303) and the upper inner wall of the rotating box (301). A magnetic block (305) is fixedly connected to each of the plurality of moving plates (303). Two electromagnets (306) are fixedly connected to the upper side wall of the mounting shell (101), and the electromagnets (306) are magnetically connected to the magnetic blocks (305).

7. The thermoforming device for a degradable plastic sheet according to claim 1, characterized in that, The suction assembly (4) includes a suction box (401). A plurality of sealing ring blocks (402) are inserted into the lower side wall of the suction box (401). A plurality of insertion tubes (403) are inserted into the plurality of sealing ring blocks (402). The lower ends of the plurality of insertion tubes (403) communicate with suction cups (404).

8. The thermoforming device for a degradable plastic sheet according to claim 7, characterized in that, The same synchronous frame (405) is fixedly connected between the plurality of insertion tubes (403), and the synchronous frame (405) is fixedly connected to the two moving plates (303). An adjustment tube (406) communicates with the suction box (401).

9. The thermoforming device for a degradable plastic sheet according to claim 4, characterized in that, The air cut-off assembly (5) includes a rotating tube (501) fixedly connected to the lower side wall of the rotating box (301), and the suction pipe (110) is inserted into the rotating tube (501). Two mechanical seals (502) are fixedly connected to the suction pipe (110).

10. The thermoforming device for a degradable plastic sheet according to claim 9, characterized in that, An air extraction notch (503) is formed in the suction pipe (110), and the air extraction notch (503) is located between the two mechanical seals (502). Two sealing strips (504) are fixedly connected between the two mechanical seals (502).

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