Separating type automatic plastic vacuum forming machine

Abstract

The invention belongs to the technical field of plastic vacuum forming machines, and particularly relates to a separated type automatic plastic vacuum forming machine which comprises plastic vacuum forming equipment, the plastic vacuum forming equipment comprises a workbench, an air cylinder is fixedly connected to the bottom of the workbench, a feeding frame is fixedly connected to the top of the workbench, and a heating plate is fixedly connected to the side wall of the feeding frame. When the mold reaches a preset position, the bottom of the sponge is in contact with the top of the plate, the built-in air suction pump is started and adsorbs the plate to the surface of the mold, the sponge continuously extrudes downwards, excessive flowing of materials is limited through elastic counter-acting force, and the stretching degree of each area is balanced; and secondly, a layer of air film can be formed between the sponge and the plate through air injection operation, friction force is reduced through the air lubrication effect, the sponge and the plate are smoothly separated, the surface of the plate can be further protected, physical damage can be further reduced, and therefore the product quality can be improved.

Description

Technical Field

[0001] This invention belongs to the field of vacuum forming machine technology, specifically a detachable automatic vacuum forming machine. Background Technology

[0002] This is a separate automatic vacuum forming machine that uses heated and softened thermoplastic sheets (such as PVC, PE, PP, PET, etc.) to adhere to the mold surface and cool to form the final shape. Its core feature is its "separate" design, meaning the main unit and the feeding system are independently located and connected via pipes for remote material supply. It can simultaneously deliver raw materials to multiple workstations, significantly improving production efficiency and reducing the machine's footprint. This model integrates an automatic control system that can precisely adjust parameters such as heating temperature, vacuum level, and forming time to ensure product dimensional accuracy and surface quality. It is suitable for vacuum forming of thin sheets (1-2mm) and thick sheets (up to 20mm), and is widely used in the packaging, electronics, automotive, and medical industries for forming irregularly shaped products such as vacuum covers, vacuum trays, blister packs, and automotive interior parts. In existing technologies, when a separate automatic thermoforming machine is working, its main unit is connected to an independent feeding system via a pipeline. The feeding system remotely delivers thermoplastic sheets to the main unit's hopper. The main unit heats the sheets to a softened state using an electric heating furnace. Then, the negative pressure generated by a vacuum pump is used to adsorb the softened sheets onto the mold surface, making them conform to the mold shape and cool and solidify. Finally, an automatic cutting device separates the finished product from the waste material. The entire process is precisely controlled by an integrated control system to regulate parameters such as heating temperature, vacuum degree, and forming time, achieving fully automated continuous production from material supply to forming.

[0003] The above-mentioned solutions still have some problems in practical applications. Although the existing equipment can complete the vacuum forming process, for some thicker plates, the material flow resistance increases significantly with the thickness during the thermoforming process. Positive pressure assistance requires airflow to push the material to fit the mold, but the rigidity of the thick plate will hinder the uniform transmission of airflow, resulting in insufficient local pressure and the material cannot fully fill the mold cavity. Secondly, when the positive pressure airflow pushes the plate to deform through the mold cavity, the airflow will attenuate in the deep cavity, sharp corner or corner area due to increased resistance, resulting in insufficient local pressure and slow material flow in these areas, which easily forms "under-pressure areas" and leads to thicker wall thickness. On the other hand, in the high pressure area (such as the cavity entrance), the material is overstretched and the wall thickness is reduced, which will reduce the uniformity of the plate wall thickness.

[0004] Therefore, the present invention provides a detachable automatic thermoforming machine. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a separate automatic vacuum forming machine, including a vacuum forming device, the vacuum forming device including a worktable, a cylinder fixedly connected to the bottom of the worktable, a feeding rack fixedly connected to the top of the worktable, a heating plate fixedly connected to the side wall of the feeding rack, and a mold fixedly connected to the output end of the cylinder, characterized in that: a downward pressing auxiliary mechanism is provided on the upper part of the vacuum forming device; The downward pressure auxiliary mechanism includes a second rack and a first rack that are slidably mounted above the worktable. A sponge is fixedly mounted on the side wall of the first rack, and a flat nozzle is fixedly mounted on the bottom of the second rack. When the first rack rises, the second rack will descend, thereby enabling the flat nozzle to complete the air jet operation.

[0007] Preferably, the pressing auxiliary mechanism includes a support frame, which is fixedly connected to the upper part of the workbench. An output motor is fixedly connected to the side wall of the support frame, and the output end of the output motor is rotatably connected inside the support frame. The output end of the output motor is fixedly connected to a linkage shaft, and a rotating gear is fixedly connected to the outer ring surface of the linkage shaft.

[0008] Preferably, the outer ring surface of the rotating gear meshes with a first rack, and the outer ring surface of the rotating gear meshes with a second rack. Both the first rack and the second rack are slidably connected to the side wall of the support frame by a slider and a groove. A connecting rod is fixedly connected to the bottom of the first rack, a support plate is fixedly connected to one end of the connecting rod, and a sponge is fixedly connected to the bottom of the support plate. The sponge is made of a high-temperature resistant material.

[0009] Preferably, when the rotating gear rotates, the first rack and the second rack will move in opposite directions along the guide groove of the support frame. The first rack, the rotating gear, the support frame, and the second rack are respectively arranged symmetrically about the central axis of the worktable. The linkage shaft is used to drive the two rotating gears to rotate synchronously.

[0010] Preferably, an air storage box is fixedly connected to the bottom side wall of the support frame, and a piston rod is slidably connected through the upper part of the air storage box. The piston rod is fixedly connected to the bottom of the second rack. A piston plate is fixedly connected to the other end of the piston rod. The piston plate is slidably connected inside the gas storage box. A flat nozzle is fixedly connected through the side wall of the gas storage box. An air inlet is opened through the other side of the gas storage box.

[0011] Preferably, a one-way valve is provided at the connection between the flat nozzle and the air inlet and the air storage box. The flat nozzle is on the same horizontal plane as the interface between the sponge and the board. When the piston rod descends, it will drive the piston plate to move downward along the inner cavity of the air storage box and make the gas spray out through the flat nozzle.

[0012] Preferably, the downward pressure auxiliary mechanism is provided with an auxiliary cleaning mechanism for cleaning. The auxiliary cleaning mechanism includes an air passage that extends through the interior of the air storage box. The air passage is U-shaped, and a first sliding rod is slidably connected inside a vertical cylinder on one side of the air passage.

[0013] Preferably, a circular plate is fixedly connected to the top of the first slide bar, and a reciprocating spring is fixedly connected to the bottom of the circular plate at the top of the first slide bar. The other end of the reciprocating spring is fixedly connected to the bottom of the inner cavity of the gas storage box.

[0014] Preferably, a second sliding rod is slidably connected inside a vertical cylinder on the other side of the air passage, and an inclined scraper is fixedly connected to the top of the second sliding rod. The inclined scraper is slidably connected to the side wall of the air inlet, and a filter screen is fixedly connected inside the air inlet.

[0015] Preferably, the one-way valve of the air inlet is located on the side of the filter screen near the inner cavity of the air storage box. The filter screen is used to block dust in the air. The side wall of the inclined scraper is attached to one side of the filter screen. The bottom of the air inlet has a sloping structure to facilitate dust falling. The filter screen can improve the cleanliness of the airflow from the flat nozzle.

[0016] The beneficial effects of this invention are as follows: 1. The present invention discloses a detachable automatic vacuum forming machine. Since the rotating gear meshes with the first and second racks, and the first and second racks are symmetrically arranged about the center of the rotating gear, when the rotating gear rotates, the first rack moves downward under the constraint of the guide groove on the side wall of the support frame. At this time, the second rack moves upward. When the first rack moves downward, it synchronously drives the connecting rod fixed to it to move downward. Since the connecting rod is fixed to the support plate, when the connecting rod moves, the support plate also moves downward synchronously, thereby driving the sponge fixed to the bottom of the support plate to move synchronously. While the sponge moves downward, the mold is lifted by the cylinder. When the mold reaches the predetermined position, the bottom of the sponge contacts the top of the board. At this time, the built-in suction pump starts and adsorbs the board onto the mold surface. The sponge continues to press downward and, through elastic reaction force, restricts excessive material flow, balancing the stretching degree of each area, thereby improving the uniformity of the wall thickness.

[0017] 2. In the detachable automatic vacuum forming machine of the present invention, since the piston rod slides through the top of the air storage box and the other end of the piston rod is fixed to the air storage box, when the second rack moves downward, it will synchronously drive the piston plate to move downward. At this time, the rotating gear will drive the sponge to move slowly upward. When the piston plate moves downward, it will compress the gas inside the air storage box. Since one-way valves are provided at the junction of the flat nozzle and the air inlet with the air storage box, when the piston plate moves downward, the gas stored inside the air storage box will be sprayed out through the flat nozzle. Since the spraying area of ​​the flat nozzle is on the same horizontal plane as the junction area between the bottom of the sponge and the board, when the sponge rises, the flat nozzle will perform air spraying operation at the junction of the board and the sponge. The air spraying operation can form an air film between the sponge and the board, reduce friction through the gas lubrication effect, and make the sponge and the board separate smoothly, further protecting the surface of the board and reducing physical damage, thereby improving product quality.

[0018] 3. The detachable automatic vacuum forming machine of the present invention, since the filter screen and the side wall of the inclined scraper are in contact, can scrape off the dust attached to the surface of the filter screen when the inclined scraper moves upward. The filter screen can improve the purity of the airflow spray from the flat nozzle, thereby reducing the possibility of dust carried by the air during spraying scratching the surface of the board, and further improving the quality of the product. Secondly, the up and down movement of the inclined scraper can prevent the filter screen from clogging, thereby improving work efficiency. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the downward pressing auxiliary mechanism shown in this invention; Figure 3 This is a schematic diagram of the positional structure of the second rack and the first rack shown in this invention; Figure 4 This is a schematic diagram of the positional structure of the piston rod and piston plate shown in this invention; Figure 5 This is the invention shown Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the internal structure of the gas storage box shown in this invention; Figure 7 This is the invention shown Figure 6 Enlarged structural diagram at point B; In the diagram: 1. Vacuum forming equipment; 101. Workbench; 102. Cylinder; 103. Feeding rack; 104. Heating plate; 105. Mold; 2. Downward pressure auxiliary mechanism; 201. Support frame; 202. Output motor; 203. Linkage shaft; 204. Rotating gear; 205. First rack; 206. Connecting rod; 207. Support plate; 208. Sponge; 209. Second rack; 210. Piston rod; 211. Air storage box; 212. Flat nozzle; 213. Piston plate; 214. Air inlet; 3. Auxiliary cleaning mechanism; 301. First slide bar; 302. Reciprocating spring; 303. Air passage; 304. Second slide bar; 305. Slanted scraper; 306. Filter screen. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0022] like Figures 1 to 7 As shown in the figure, a separate automatic vacuum forming machine according to an embodiment of the present invention includes a vacuum forming device 1, the vacuum forming device 1 including a worktable 101, a cylinder 102 fixedly connected to the bottom of the worktable 101, a feeding rack 103 fixedly connected to the top of the worktable 101, a heating plate 104 fixedly connected to the side wall of the feeding rack 103, and a mold 105 fixedly connected to the output end of the cylinder 102. The characteristic of the invention is that a downward pressing auxiliary mechanism 2 is provided on the upper part of the vacuum forming device 1. The downward pressure auxiliary mechanism 2 includes a second rack 209 and a first rack 205 that are slidably disposed above the worktable 101. A sponge 208 is fixedly disposed on the side wall of the first rack 205, and a flat nozzle 212 is fixedly disposed at the bottom of the second rack 209. When the first rack 205 rises, the second rack 209 will fall, thereby enabling the flat nozzle 212 to complete the jetting operation.

[0023] Specifically, although existing equipment can complete vacuum forming, for some thicker sheets, the material flow resistance increases significantly with thickness during thermoforming. Positive pressure assistance requires airflow to push the material to fit the mold 105, but the rigidity of the thick sheet hinders the uniform transmission of airflow, resulting in insufficient local pressure. The material cannot fully fill the cavity of the mold 105. Secondly, when the positive pressure airflow pushes the sheet to deform through the cavity of the mold 105, the airflow will attenuate in deep cavities, sharp corners, or corner areas due to increased resistance, resulting in insufficient local pressure and slow material flow in these areas, easily forming "under-pressure zones" and causing the wall thickness to be too thick. On the other hand, in high-pressure areas (such as the cavity entrance), the material is overstretched, and the wall thickness is reduced, which will reduce the uniformity of the sheet wall thickness. Therefore, this invention solves this problem by setting a corresponding structure. The present invention provides a separate automatic vacuum forming machine. When vacuum forming thick sheet materials is required, the sheet material to be vacuum-formed is placed on the feeding rack 103 for conveying. When the sheet material reaches the heating plate 104, the heating plate 104 is activated and heats the sheet material. After heating, the sheet material is conveyed through the feeding rack 103 to directly above the mold 105. At this time, the cylinder 102 is activated, and the output end of the cylinder 102 drives the mold 105 upward, lifting the sheet material placed on the feeding rack 103. The built-in suction pump is then activated to suction air, thus completing the vacuum forming process. However, because the material flow resistance increases significantly with thickness during the thermoforming process of thick sheet materials, positive pressure assistance requires airflow to push the material. The material adheres to the mold 105, but the rigidity of the thick plate will hinder the uniform transmission of airflow, resulting in insufficient local pressure. The material cannot fully fill the cavity of the mold 105. Secondly, when the positive pressure airflow pushes the plate to deform through the cavity of the mold 105, the airflow will attenuate due to increased resistance in deep cavities, sharp corners, or corner areas, resulting in insufficient local pressure. The material flows slowly in these areas, which easily forms "under-pressure areas" and leads to thicker walls. In high-pressure areas (such as the cavity entrance), the material is overstretched, and the wall thickness is reduced, which will reduce the uniformity of the plate wall thickness. At this time, the first toothed rack 205 moves downward to drive the sponge 208 to move synchronously, so that the sponge 208 adheres to the surface of the mold 105, thereby improving the accuracy of vacuum forming and avoiding the uneven plate thickness caused by positive assistance. Example

[0024] like Figures 2 to 7 As shown in Example 1, another embodiment of the present invention is as follows: like Figure 2 As shown, the pressing auxiliary mechanism 2 in this embodiment includes a support frame 201, which is fixedly connected to the upper part of the workbench 101. An output motor 202 is fixedly connected to the side wall of the support frame 201, and the output end of the output motor 202 is rotatably connected inside the support frame 201. The output motor 202 is fixedly connected to a linkage shaft 203 at its output end, and a rotating gear 204 is fixedly connected to the outer ring surface of the linkage shaft 203.

[0025] like Figure 3 As shown, in this embodiment, the outer ring surface of the rotating gear 204 is meshed with a first rack 205, and the outer ring surface of the rotating gear 204 is meshed with a second rack 209. Both the first rack 205 and the second rack 209 are slidably connected to the side wall of the support frame 201 by a slider and a groove. The first rack 205 is fixedly connected to a connecting rod 206 at its bottom. One end of the connecting rod 206 is fixedly connected to a support plate 207. The bottom of the support plate 207 is fixedly connected to a sponge 208, which is made of a high-temperature resistant material.

[0026] Specifically, when the plate material comes to the top of the mold 105, the output motor 202 fixedly connected to the side wall of the support frame 201 is started. When the output motor 202 starts, it will drive the linkage shaft 203 fixed to it to rotate synchronously through its output shaft. Since the rotating gear 204 is fixed on the outer ring surface of the linkage shaft 203, when the linkage shaft 203 rotates, it will drive the rotating gear 204 to rotate synchronously. Since the rotating gear 204 meshes with the first rack 205 and the second rack 209, and the first rack 205 and the second rack 209 are symmetrically arranged about the center of the rotating gear 204, when the rotating gear 204 rotates, the first rack 205 moves downward under the constraint of the guide groove on the side wall of the support frame 201. At this time, the second rack 209 moves upward. When the first rack 205 moves downward, it will synchronously drive the connecting rod 206 fixed to it to move downward. Since the connecting rod 206 is fixed to the support plate 207, when the connecting rod 206 moves, the support plate 207 will move downward. The support plate 207 will also move downwards in sync, which will drive the sponge 208 fixed at the bottom of the support plate 207 to move synchronously. While the sponge 208 moves downwards, the mold 105 will be lifted by the cylinder 102. When the mold 105 reaches the predetermined position, the bottom of the sponge 208 will contact the top of the board. At this time, the built-in suction pump will start and adsorb the board onto the surface of the mold 105. The sponge 208 will continue to press downwards and limit the excessive flow of material through elastic reaction force, balance the degree of stretching in each area, and thus improve the uniformity of wall thickness.

[0027] like Figure 4 and Figure 5 As shown, in this embodiment, a gas storage box 211 is fixedly connected to the bottom side wall of the support frame 201, and a piston rod 210 is slidably connected through the upper part of the gas storage box 211. The piston rod 210 is fixedly connected to the bottom of the second rack 209. The piston rod 210 is fixedly connected to a piston plate 213 at the other end. The piston plate 213 is slidably connected inside the gas storage box 211. A flat nozzle 212 is fixedly connected through the side wall of the gas storage box 211. An air inlet 214 is opened through the other side of the gas storage box 211.

[0028] Specifically, when the sponge 208 finishes its work, the rotating gear 204 will rotate in the opposite direction under the drive of the output motor 202. At this time, the first rack 205 will drive the sponge 208 to move upward, while the second rack 209 will move downward. Since the piston rod 210 and the second rack 209 are fixed, when the second rack 209 moves downward, the piston rod 210 will also move downward synchronously. Since the piston rod 210 slides through the top of the gas storage box 211 and the other end of the piston rod 210 is fixed to the gas storage box 211, when the second rack 209 moves downward, it will synchronously drive the piston plate 213 to move downward. At this time, the rotating gear 204 will drive the sponge 208 to move upward slowly. When the piston plate 213 moves downward, it will compress the gas inside the gas storage box 211. Since one-way valves are provided at the junctions of the flat nozzle 212 and the air inlet 214 with the gas storage box 211, when the piston plate 213 moves downward, the gas stored in the gas storage box 211 is compressed. The gas inside the air box 211 is ejected through the flat nozzle 212. Since the spraying area of ​​the flat nozzle 212 is on the same horizontal plane as the interface between the bottom of the sponge 208 and the board, when the sponge 208 rises, the flat nozzle 212 will spray air at the interface between the board and the sponge 208. The air spraying operation can form an air film between the sponge 208 and the board. Through the gas lubrication effect, the friction is reduced, and the sponge 208 and the board are smoothly separated. This further protects the surface of the board, reduces physical damage, and thus improves product quality.

[0029] like Figure 6 and Figure 7 As shown, the downward pressure auxiliary mechanism 2 described in this embodiment is provided with an auxiliary cleaning mechanism 3 for cleaning. The auxiliary cleaning mechanism 3 includes an air passage 303, which is opened through the air storage box 211. The air passage 303 is U-shaped, and a first slide rod 301 is slidably connected inside a vertical cylinder on one side of the air passage 303.

[0030] like Figure 6 and Figure 7 As shown, in this embodiment, a circular plate is fixedly connected to the top of the first slide bar 301, and a reciprocating spring 302 is fixedly connected to the bottom of the circular plate at the top of the first slide bar 301. The other end of the reciprocating spring 302 is fixedly connected to the bottom of the inner cavity of the gas storage box 211.

[0031] like Figure 6 and Figure 7 As shown, in this embodiment, a second slide rod 304 is slidably connected inside the vertical cylinder on the other side of the air passage 303. An inclined scraper 305 is fixedly connected to the top of the second slide rod 304. The inclined scraper 305 is slidably connected to the side wall of the air inlet 214. A filter screen 306 is fixedly connected inside the air inlet 214.

[0032] Specifically, when the piston plate 213 moves downward, the one-way valve in the area of ​​the air inlet 214 will not open. At this time, the airflow can only be blown out through the flat nozzle 212. When the piston plate 213 moves to the plane where the flat nozzle 212 is located, the sponge 208 will completely leave the surface of the plate. At this time, the piston plate 213 will continue to move downward, and during the movement, its bottom will contact the top of the first slide rod 301. While moving downward, it will drive the first slide rod 301 to move downward. At this time, the fixed reciprocating spring 302 will be compressed. Since the second slide rod 304 and the air passage 303 are provided with sealing material at the junction of the second slide rod 304 and the second slide rod 304, when the first slide rod 301 moves downward along the guide of the vertical cylinder of the air passage 303, the gas inside the air passage 303 will flow to the other vertical cylinder of the air passage 303. The airflow flows in the direction of the cylinder, and while flowing, it pushes the second slide bar 304 upward along the guide of another vertical cylinder of the air passage 303. At the same time, it pushes the inclined scraper 305, which is fixed to the top of the second slide bar 304, upward along the guide groove on the side wall of the air inlet 214. Since the filter screen 306 is in contact with the side wall of the inclined scraper 305, the dust attached to the surface of the filter screen 306 can be scraped off when the inclined scraper 305 moves upward. The setting of the filter screen 306 can improve the purity of the airflow from the flat nozzle 212, thereby reducing the situation where dust carried by the air during jetting scratches the surface of the plate, and further improving the quality of the product. Secondly, the up and down movement of the inclined scraper 305 can prevent the filter screen 306 from clogging, thereby improving the efficiency of work.

[0033] Working principle: When the plate material comes to the top of the mold 105, the output motor 202, which is fixedly connected to the side wall of the support frame 201, is started. When the output motor 202 starts, it will drive the linkage shaft 203 fixed to it to rotate synchronously through its output shaft. Since the rotating gear 204 is fixed on the outer ring surface of the linkage shaft 203, when the linkage shaft 203 rotates, it will drive the rotating gear 204 to rotate synchronously. Since the rotating gear 204 meshes with the first rack 205 and the second rack 209, and the first rack 205 and the second rack 209 are symmetrically arranged about the center of the rotating gear 204, when the rotating gear 204 rotates, the first rack 205 moves downward under the constraint of the guide groove on the side wall of the support frame 201. At this time, the second rack 209 moves upward. When the first rack 205 moves downward, it will synchronously drive the connecting rod 206 fixed to it to move downward. Since the connecting rod 206 is fixed to the support plate 207, when the connecting rod 206 moves, the support plate 207 will move downward. The support plate 207 will also move downwards in sync, which will drive the sponge 208 fixed at the bottom of the support plate 207 to move synchronously. While the sponge 208 moves downwards, the mold 105 will be lifted by the cylinder 102. When the mold 105 reaches the predetermined position, the bottom of the sponge 208 will contact the top of the board. At this time, the built-in suction pump will start and adsorb the board onto the surface of the mold 105. The sponge 208 will continue to press downwards and limit the excessive flow of material through elastic reaction force, balance the degree of stretching in each area, and thus improve the uniformity of wall thickness.

[0034] When the sponge 208 finishes its work, the rotating gear 204 will rotate in the opposite direction under the drive of the output motor 202. At this time, the first rack 205 will drive the sponge 208 to move upward, while the second rack 209 will move downward. Since the piston rod 210 and the second rack 209 are fixed, when the second rack 209 moves downward, the piston rod 210 will also move downward synchronously. Since the piston rod 210 slides through the top of the gas storage box 211 and the other end of the piston rod 210 is fixed to the gas storage box 211, when the second rack 209 moves downward, it will synchronously drive the piston plate 213 to move downward. At this time, the rotating gear 204 will drive the sponge 208 to move upward slowly. When the piston plate 213 moves downward, it will compress the gas inside the gas storage box 211. Since one-way valves are provided at the junctions of the flat nozzle 212 and the air inlet 214 with the gas storage box 211, when the piston plate 213 moves downward, the gas stored in the gas storage box 211 is compressed. The gas inside the air box 211 is ejected through the flat nozzle 212. Since the spraying area of ​​the flat nozzle 212 is on the same horizontal plane as the interface between the bottom of the sponge 208 and the board, when the sponge 208 rises, the flat nozzle 212 will spray air at the interface between the board and the sponge 208. The air spraying operation can form an air film between the sponge 208 and the board. Through the gas lubrication effect, the friction is reduced, and the sponge 208 and the board are smoothly separated. This further protects the surface of the board, reduces physical damage, and thus improves product quality.

[0035] When the piston plate 213 moves downward, the one-way valve in the area of ​​the air inlet 214 will not open. At this time, the airflow can only be blown out through the flat nozzle 212. When the piston plate 213 moves to the plane where the flat nozzle 212 is located, the sponge 208 will completely leave the surface of the plate. At this time, the piston plate 213 will continue to move downward, and during the movement, its bottom will contact the top of the first slide rod 301. While moving downward, it will drive the first slide rod 301 downward. At this time, the fixed reciprocating spring 302 will be compressed. Since the second slide rod 304 and the air passage 303 are provided with sealing material at the junction of the second slide rod 304 and the second slide rod 304, when the first slide rod 301 moves downward along the guide of the vertical cylinder of the air passage 303, the gas inside the air passage 303 will flow to the other vertical cylinder of the air passage 303. The airflow moves upwards, pushing the second slide bar 304 upwards along the guide of another vertical cylinder of the air passage 303. Simultaneously, the inclined scraper 305, fixed to the top of the second slide bar 304, moves upwards along the guide groove on the side wall of the air inlet 214. Since the filter screen 306 is in contact with the side wall of the inclined scraper 305, the upward movement of the inclined scraper 305 can scrape off the dust adhering to the surface of the filter screen 306. The filter screen 306 improves the purity of the airflow from the flat nozzle 212, thereby reducing the likelihood of dust carried by the airflow scratching the surface of the material, further improving product quality. Furthermore, the up-and-down movement of the inclined scraper 305 prevents the filter screen 306 from clogging, thus improving work efficiency.

[0036] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A separate automatic vacuum forming machine, comprising a vacuum forming device (1), the vacuum forming device (1) including a worktable (101), a cylinder (102) fixedly connected to the bottom of the worktable (101), a feeding rack (103) fixedly connected to the top of the worktable (101), a heating plate (104) fixedly connected to the side wall of the feeding rack (103), and a mold (105) fixedly connected to the output end of the cylinder (102), characterized in that: The upper part of the thermoforming equipment (1) is provided with a downward pressure auxiliary mechanism (2); The downward pressure auxiliary mechanism (2) includes a second rack (209) and a first rack (205) that are slidably disposed above the worktable (101). A sponge (208) is fixedly disposed on the side wall of the first rack (205), and a flat nozzle (212) is fixedly disposed at the bottom of the second rack (209). When the first rack (205) rises, the second rack (209) will fall, thereby enabling the flat nozzle (212) to complete the jetting operation.

2. The detachable automatic thermoforming machine according to claim 1, characterized in that: The pressing auxiliary mechanism (2) includes a support frame (201), which is fixedly connected to the upper part of the workbench (101). An output motor (202) is fixedly connected to the side wall of the support frame (201), and the output end of the output motor (202) is rotatably connected inside the support frame (201). The output motor (202) has a linkage shaft (203) fixedly connected to its output end, and a rotating gear (204) is fixedly connected to the outer ring surface of the linkage shaft (203).

3. The detachable automatic thermoforming machine according to claim 2, characterized in that: The outer ring surface of the rotating gear (204) is meshed with a first rack (205), and the outer ring surface of the rotating gear (204) is meshed with a second rack (209). The first rack (205) and the second rack (209) are slidably connected to the side wall of the support frame (201) by a slider and a groove. The first rack (205) is fixedly connected to a connecting rod (206) at its bottom. One end of the connecting rod (206) is fixedly connected to a support plate (207). The bottom of the support plate (207) is fixedly connected to a sponge (208), which is made of high-temperature resistant material.

4. The detachable automatic thermoforming machine according to claim 3, characterized in that: When the rotating gear (204) rotates, the first rack (205) and the second rack (209) will move in opposite directions along the guide groove of the support frame (201). The first rack (205), the rotating gear (204), the support frame (201) and the second rack (209) are respectively symmetrically arranged about the central axis of the worktable (101). The linkage shaft (203) is used to drive the two rotating gears (204) to rotate synchronously.

5. A detachable automatic thermoforming machine according to claim 4, characterized in that: The support frame (201) has a gas storage box (211) fixedly connected to its bottom side wall. A piston rod (210) is slidably connected through the upper part of the gas storage box (211). The piston rod (210) is fixedly connected to the bottom of the second rack (209). The piston rod (210) is fixedly connected to a piston plate (213) at the other end. The piston plate (213) is slidably connected inside the gas storage box (211). A flat nozzle (212) is fixedly connected through the side wall of the gas storage box (211). An air inlet (214) is opened through the other side of the gas storage box (211).

6. A detachable automatic thermoforming machine according to claim 5, characterized in that: One-way valves are provided at the connection between the flat nozzle (212) and the air inlet (214) and the air storage box (211). The flat nozzle (212) is on the same horizontal plane as the interface between the sponge (208) and the board. When the piston rod (210) descends, it will drive the piston plate (213) to move downward along the inner cavity of the air storage box (211) and make the gas spray out through the flat nozzle (212).

7. A detachable automatic thermoforming machine according to claim 6, characterized in that: The downward pressure auxiliary mechanism (2) is provided with an auxiliary cleaning mechanism (3) for cleaning. The auxiliary cleaning mechanism (3) includes an air passage (303), which is opened through the interior of the air storage box (211). The air passage (303) is U-shaped, and a first slide rod (301) is slidably connected inside a vertical cylinder on one side of the air passage (303).

8. A detachable automatic thermoforming machine according to claim 7, characterized in that: A circular plate is fixedly connected to the top of the first slide bar (301), and a reciprocating spring (302) is fixedly connected to the bottom of the circular plate at the top of the first slide bar (301). The other end of the reciprocating spring (302) is fixedly connected to the bottom of the inner cavity of the gas storage box (211).

9. A detachable automatic thermoforming machine according to claim 8, characterized in that: A second slide rod (304) is slidably connected inside a vertical cylinder on the other side of the air passage (303). An inclined scraper (305) is fixedly connected to the top of the second slide rod (304). The inclined scraper (305) is slidably connected to the side wall of the air inlet (214). A filter screen (306) is fixedly connected inside the air inlet (214).

10. A detachable automatic thermoforming machine according to claim 9, characterized in that: The one-way valve of the air inlet (214) is located on the side of the filter screen (306) near the inner cavity of the air storage box (211). The filter screen (306) is used to block dust in the air. The side wall of the inclined scraper (305) is attached to one side of the filter screen (306). The bottom of the air inlet (214) is a sloping structure to facilitate dust falling. The setting of the filter screen (306) can improve the cleanliness of the airflow of the flat nozzle (212).

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