A fully automatic thermoforming machine

Abstract

The application discloses a full-automatic thermoforming machine, which comprises an upper die mechanism and a lower die mechanism, the upper die mechanism is provided with a pressing block, and the lower die mechanism is provided with a lower die box; a driving assembly, the driving assembly comprises a driving source and a translation transmission part which is driven by the driving source to perform a translation movement; a micro-rotation assembly, the micro-rotation assembly comprises a first micro-rotation input part which is connected with a rotating shaft of the pressing block and a second micro-rotation output part which is fixed on the lower die box, and the first micro-rotation input part is in transmission connection with the second micro-rotation output part; a pump air demolding assembly, the pump air demolding assembly comprises a jet air duct which is communicated with the bottom of the lower die box and a pump air mechanism which is linked with the translation transmission part. The application aims at solving the technical problems that the existing thermoforming machine is prone to cause deformation and strain of thin-walled products, it is difficult to break the vacuum adsorption, and the blowing hole of the die bottom is prone to leave marks during demolding.

Description

Technical Field

[0001] This invention relates to the field of plastic product processing equipment technology, and in particular to a fully automatic thermoforming machine. Background Technology

[0002] In the field of plastic film thermoforming (such as the production of plastic cups, bowls and other containers), after hot pressing and cooling, the formed cup body will generate extremely strong surface vacuum adsorption force and cooling wrapping and shrinking force between the outer wall of the upper mold and the inner wall of the lower mold box.

[0003] Traditional demolding methods mainly rely on the upper mold to pull upwards rigidly or the lower mold to continuously supply compressed air. However, simply pulling upwards rigidly can easily cause thin-walled plastic cups to turn white, deform, or even tear. On the other hand, relying solely on air blowing for demolding makes it difficult for high-pressure gas to penetrate between the tightly fitting cup walls, often resulting in incomplete demolding or sticking to the mold. In addition, the fixed air holes at the bottom of the lower mold can easily leave uneven marks on the softened plastic cup bottom, affecting the product's appearance quality.

[0004] Therefore, a fully automatic thermoforming machine needs to be designed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fully automatic thermoforming machine. The technical problem to be solved by this invention is to overcome the defects of existing thermoforming machines, such as the easy deformation and tearing of thin-walled products during demolding, the difficulty in removing defects caused by vacuum adsorption, and the easy leaving of marks on the surface of the product by the blowholes at the bottom of the mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fully automatic thermoforming machine includes an upper mold mechanism and a lower mold mechanism, wherein the upper mold mechanism is provided with a lower pressure block and the lower mold mechanism is provided with a lower mold box; The drive assembly includes a drive source and a translational transmission component that is driven by the drive source to perform translational motion. The micro-rotation assembly includes a first micro-rotation input component connected to the lower pressure block shaft, and a second micro-rotation output component fixed on the lower mold box. The first micro-rotation input component and the second micro-rotation output component are connected in a driving connection. The air pump demolding assembly includes an air jet channel communicating with the bottom of the lower mold box, and an air pumping mechanism linked to the translational transmission component. During the demolding stage, the drive source drives the translational transmission component to translate, causing the lower pressure block to rotate, and the mold box rotates through the linkage of the first micro-rotation input component and the second micro-rotation output component; at the same time, the translational transmission component drives the air pumping mechanism to pump air into the air jet channel for demolding.

[0007] In some possible implementations, the drive source is two dual-axis cylinders mounted on the lifting plate, and the translation transmission component is a rectangular plate fixedly connected to the telescopic ends of the two dual-axis cylinders. The lower pressure block is fixedly connected to the lower end of the rotating rod, and a rotating gear is fixedly connected to the rotating rod. The adjacent sides of the two rectangular plates are each fixedly connected with a first rack that meshes with the rotating gear.

[0008] In some possible implementations, the first micro-rotary input device includes a fixed plate fixedly connected to the rotating rod, a vertical rod fixedly connected to the lower end of the fixed plate, and a fixed gear fixedly connected to the lower end of the vertical rod. The second micro-rotating output component includes a rotating ring fixedly connected to the outer wall of the lower mold box. The upper end of the rotating ring is provided with an annular groove, and the inner wall of the annular groove is fixedly connected with internal teeth that mesh with the fixed gear.

[0009] In some possible implementations, the air pumping mechanism includes a strip box fixedly connected to the lifting plate, a movable plate and a piston plate slidably connected inside the strip box, the movable plate and the piston plate being elastically connected by a first spring, and the movable plate being fixedly connected to a rectangular plate by a connecting rod; The jet duct includes a cavity opened in a rectangular box and a vertical pipe connected to the lower end of the lower mold box. The strip box and the cavity are connected by a flexible tube. A rotary joint is installed at the inner bottom of the rectangular box. The lower end of the vertical pipe is connected to the cavity through the rotary joint. The strip box is connected to an air inlet pipe, and both the air inlet pipe and the hose are equipped with a one-way valve.

[0010] In some possible implementations, a vertical micro-movement assembly is also included, which includes a threaded rod rotatably connected to the lower end of a horizontal plate, a threaded sleeve rotatably connected to the upper end of a lifting plate, a through hole provided on the lifting plate, the threaded rod passing through the through hole, and a plurality of toothed ridges fixedly connected to the outer wall of the threaded sleeve, one of which is a second rack fixedly connected to a rectangular plate that meshes with the toothed ridges.

[0011] In some possible implementations, each of the vertical tubes is provided with a self-closing assembly, the self-closing assembly including an annular block fixedly connected inside the vertical tube, a conical block slidably connected inside the vertical tube, the conical block and the annular block being elastically connected by a second spring, and the upper end face radius of the conical block being the same as the radius of the vertical tube; When there is no airflow inside the vertical tube, the conical block closes the vertical tube, and the upper end face of the conical block is flush with the inner bottom of the lower mold box; in the air-jet demolding state, the airflow pushes the conical block upward to open the vertical tube.

[0012] In some possible implementations, each of the rotating rods has a cylindrical cavity, and a circular block is slidably connected in each cylindrical cavity. A linear cylinder is installed at the top of each cylindrical cavity, and the telescopic end of each linear cylinder is fixedly connected to the circular block. Multiple strip-shaped openings are provided on the outer side of the cylindrical cavity. Multiple thin rods are fixedly connected to the circular block, and the multiple thin rods pass through the corresponding strip-shaped openings and are jointly fixedly connected to an annular blade.

[0013] In some possible implementations, a frame and a feeding frame are also included. The frame is provided with a heating mechanism, a hot pressing mechanism and a material handling mechanism from left to right. A hydraulic cylinder is installed at the upper end of the frame. The horizontal plate is fixedly connected to the telescopic end of the hydraulic cylinder. The lower end of the horizontal plate is connected to the lifting plate through multiple telescopic rods. A fixed base is fixedly connected to the inner bottom of the frame. The rectangular box is fixedly connected to the fixed base. The upper end of the rectangular box has multiple circular openings for rotatably installing the lower mold box.

[0014] The present invention has the following beneficial effects: Multi-dimensional linkage demolding: Through a single power source, the upper and lower molds are synchronously linked to generate relative micro-angular displacement and reverse twisting, which uses tangential shear stress to weaken the adsorption force and adhesion between the cup wall and the mold contact surface; combined with the micro-axial lifting caused by the threaded drive, the probability of deformation, whitening and tearing during demolding of thin-walled plastic cups is reduced.

[0015] Self-driven pulse air pump: Drives the translation mechanism to link the piston plate to compress air, combining mechanical action with air pumping logic, reducing reliance on complex external electromagnetic valve control chains, and can form an air cushion at the bottom of the lower mold box during the demolding stage to lift the cup body.

[0016] Optimized mold bottom flatness: The self-sealing conical block with spring support is installed inside the vertical tube, and it is basically flush with the bottom of the lower mold box during the molding period, which helps to improve the defect that traditional air holes can easily leave indentation marks on the bottom of plastic cups.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a fully automatic thermoforming machine proposed in this invention; Figure 2 This is a front structural diagram of a fully automatic thermoforming machine proposed in this invention; Figure 3 This is a schematic diagram of the lower mold mechanism; Figure 4 This is a sectional view of the lower mold mechanism; Figure 5 This is a schematic diagram of the upper mold mechanism; Figure 6 This is a front view of the upper mold mechanism. Figure 7 This is a top-view sectional view of the upper mold mechanism; Figure 8 This is a structural schematic diagram of the lower mold box; Figure 9 This is a schematic diagram of the lower pressure block; Figure 10 for Figure 9 A sectional view.

[0019] In the diagram: 101 Frame, 102 Feeding machine frame, 103 Hydraulic cylinder, 104 Fixed base, 105 Material handling mechanism, 106 Heating mechanism, 200 Lower mold mechanism, 201 Rectangular box, 202 Lower mold box, 203 Rotating ring, 204 Internal gear, 300 Upper mold mechanism, 301 Horizontal plate, 302 Lower pressure block, 303 Rotating rod, 304 Rotating gear, 305 Fixed plate, 306 Vertical rod, 307 Fixed gear, 308 Lifting plate, 401 Flexible hose, 4 02 Strip box, 403 Inlet pipe, 404 Connecting rod, 405 Rotary joint, 406 Moving plate, 407 First spring, 408 Piston plate, 409 Vertical pipe, 410 Cavity, 501 Second spring, 502 Conical block, 503 Annular block, 601 Linear cylinder, 602 Circular block, 603 Thin rod, 604 Annular blade, 701 Dual-axis cylinder, 702 Rectangular plate, 703 First rack, 801 Threaded sleeve, 802 Toothed edge, 803 Second rack. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Reference Figures 1-10 As shown, this embodiment provides a fully automatic thermoforming machine, including a frame 101 and a feeding frame 102. The frame 101 is provided with a heating mechanism 106, a hot pressing mechanism and a material handling mechanism 105 from left to right. A hydraulic cylinder 103 is installed at the upper end of the frame 101. A fixed base 104 is fixedly connected to the inner bottom of the frame 101. A rectangular box 201 is fixedly connected to the fixed base 104. The upper end of the rectangular box 201 has multiple round openings for rotating and installing the lower mold box 202.

[0022] The hot pressing mechanism includes an upper mold mechanism 300 and a lower mold mechanism 200.

[0023] The upper mold mechanism 300 includes a horizontal plate 301, a lower pressure block 302, and a rotating rod 303. The horizontal plate 301 is fixedly connected to the telescopic end of the hydraulic cylinder 103. The hydraulic cylinder 103 drives the horizontal plate 301 to rise and fall in the vertical direction. The rotating rod 303 is rotatably connected to the horizontal plate 301. The lower end of the rotating rod 303 is fixedly connected to the lower pressure block 302. The upper part of the rotating rod 303 is fixedly connected to a rotating gear 304. The lower end of the horizontal plate 301 is connected to a lifting plate 308 through multiple telescopic rods. The telescopic rods allow the lifting plate 308 to produce a small amount of additional vertical displacement relative to the horizontal plate 301.

[0024] The lower mold mechanism 200 includes a rectangular box 201 and a lower mold box 202. A rotating ring 203 is fixedly connected to the outer wall of the lower mold box 202. The rotating ring 203 is rotatably installed in the circular opening at the upper end of the rectangular box 201, so that the lower mold box 202 can rotate around its own axis inside the rectangular box 201. An annular groove is provided at the upper end of the rotating ring 203, and an internal tooth 204 is fixedly connected to the inner wall of the annular groove.

[0025] like Figure 5 and Figure 6 As shown, the system also includes a drive assembly, which comprises two dual-axis cylinders 701 and two rectangular plates 702. The two dual-axis cylinders 701 are symmetrically mounted on the lifting plate 308, and the telescopic end of each dual-axis cylinder 701 is fixedly connected to a rectangular plate 702. The two rectangular plates 702 can be driven by the dual-axis cylinders 701 to perform horizontal translational movements towards or away from each other. First racks 703 are fixedly connected to adjacent sides (i.e., the sides facing each other) of the two rectangular plates 702, and the two first racks 703 mesh with rotating gears 304 from both sides respectively.

[0026] When the two dual-axis cylinders 701 retract simultaneously, the two rectangular plates 702 move in opposite directions, and the two first racks 703 push the rotating gear 304 to rotate in the same direction, thereby causing the rotating rod 303 and the lower pressure block 302 to rotate around their own axis by a certain angle. When the dual-axis cylinders 701 extend, the rectangular plates 702 move in opposite directions to reset, and the rotating gear 304 rotates in the opposite direction to reset.

[0027] like Figure 3 , Figure 4 , Figure 9 and Figure 10 As shown, it also includes a micro-spinning component, which includes a first micro-spinning input and a second micro-spinning output.

[0028] The first micro-rotary input component includes a fixed plate 305 fixedly connected to the rotating rod 303. A vertical rod 306 is fixedly connected to the lower end of the fixed plate 305. A fixed gear 307 is fixedly connected to the lower end of the vertical rod 306. When the rotating rod 303 rotates, the fixed plate 305, the vertical rod 306 and the fixed gear 307 rotate synchronously with the rotating rod 303. The fixed gear 307 revolves around the axis of the rotating rod 303.

[0029] The second micro-rotation output component includes a rotating ring 203 fixedly connected to the outer wall of the lower mold box 202, and the internal teeth 204 of the annular groove at the upper end of the rotating ring 203 mesh with the fixed gear 307.

[0030] The fixed plate 305, the vertical rod 306, and the fixed gear 307 are all rigidly connected to the rotating rod 303. When the rotating rod 303 rotates, the three of them revolve synchronously with the rotating rod 303. Since the fixed gear 307 and the vertical rod 306 are fixedly connected, the fixed gear 307 does not rotate on its own when it revolves around the axis of the rotating rod 303. Its tooth surface orientation remains constant. During the revolution, the tooth surface of the fixed gear 307 contacts and meshes with each tooth of the inner tooth 204 of the rotating ring 203 in sequence, converting the revolution into a circumferential thrust on the inner tooth 204, driving the rotating ring 203 to rotate around the axis of the lower mold box 202, thereby causing the lower mold box 202 and the lower pressure block 302 to rotate slightly in the same direction.

[0031] This transmission relationship essentially constitutes a planetary gear transmission structure: the fixed gear 307 is equivalent to a non-rotating planetary gear, and the internal gear 204 is equivalent to the driven central gear. When the planetary gear does not rotate, its revolution motion directly drives the central gear to rotate in the same direction. Therefore, the micro-rotation direction of the lower pressure block 302 and the lower mold box 202 is the same. The micro-rotation of the lower pressure block 302 and the lower mold box 202 in the same direction causes a relative rotational displacement between the molded product and the inner wall of the lower mold box 202, breaking the static friction and adsorption force between the two, and realizing rotation-assisted demolding.

[0032] like Figures 4-7 As shown, it also includes a pump-air demolding assembly, which includes a pumping mechanism and an air jet passage.

[0033] The air pumping mechanism includes a strip box 402, a movable plate 406, a piston plate 408, a first spring 407, a connecting rod 404, and an air inlet pipe 403. The strip box 402 is fixedly connected to the lifting plate 308. The movable plate 406 and the piston plate 408 are slidably connected inside the strip box 402. The movable plate 406 is located outside the piston plate 408. The movable plate 406 and the piston plate 408 are elastically connected by the first spring 407. The movable plate 406 is fixedly connected to one of the rectangular plates 702 by the connecting rod 404. One end of the strip box 402 is connected to the air inlet pipe 403. The air inlet pipe 403 is equipped with a one-way valve, which allows outside air to enter the strip box 402 but prevents the internal gas from being discharged outward.

[0034] The jet duct includes a cavity 410 opened in the rectangular box 201, and a plurality of vertical pipes 409 connected to the lower end of the lower mold box 202. The other end of the strip box 402 is connected to the cavity 410 through a hose 401. The hose 401 is equipped with a one-way valve, which allows airflow from the strip box 402 to the cavity 410 but prevents backflow. A rotary joint 405 is installed at the inner bottom of the rectangular box 201, and the lower end of the vertical pipe 409 is connected to the cavity 410 through the rotary joint 405.

[0035] During the demolding stage, when the rectangular plate 702 is translated, it drives the moving plate 406 to move inside the strip box 402 via the connecting rod 404. The moving plate 406 compresses the first spring 407, and the first spring 407 transmits the elastic force to the piston plate 408. The piston plate 408 compresses the air inside the strip box 402. The compressed air reaches the bottom of the lower mold box 202 through the hose 401, cavity 410, rotary joint 405 and vertical pipe 409, and is sprayed upward to form a pulse air cushion that smoothly lifts the molded product.

[0036] The rotary joint 405 ensures that the air passage between the vertical pipe 409 and the cavity 410 remains uninterrupted during the rotational demolding process of the lower mold box 202, thus guaranteeing the synchronous and continuous operation of rotational demolding and air-blowing demolding.

[0037] During the reciprocating stroke of the dual-axis cylinder 701, the rectangular plate 702 drives the moving plate 406 to move back, generating negative pressure in the strip box 402. The one-way valve on the air intake pipe 403 opens, and outside air is replenished into the strip box 402 through the air intake pipe 403 to prepare for the next pumping. At the same time, the one-way valve on the hose 401 prevents the air in the cavity 410 from flowing back.

[0038] It is worth mentioning that by elastically connecting the moving plate 406 and the piston plate 408 through the first spring 407, even if the plastic cup is completely stuck to the inner wall of the lower mold box 202, preventing gas from entering between the plastic cup and the lower mold box 202, the two moving plates 406 can still move to the preset position (at which time the first spring 407 is compressed).

[0039] like Figure 8 As shown, each vertical tube 409 is equipped with a self-closing component, which includes an annular block 503, a conical block 502, and a second spring 501.

[0040] The annular block 503 is fixedly connected to the middle of the inner wall of the vertical pipe 409, and the conical block 502 is slidably connected inside the vertical pipe 409, located above the annular block 503. The conical block 502 and the annular block 503 are elastically connected by the second spring 501. The upper end face radius of the conical block 502 is the same as the inner radius of the vertical pipe 409, so that the upper end face of the conical block 502 can completely block the upper port of the vertical pipe 409.

[0041] During the hot pressing stage, no airflow passes through the vertical tube 409. The second spring 501 pushes the conical block 502 upward to the sealing position. The upper end face of the conical block 502 seals the vertical tube 409, and the upper end face of the conical block 502 is flush with the inner bottom of the lower mold box 202, ensuring the airtightness of the bottom of the cavity and the flatness of the forming surface.

[0042] In the jet-assisted demolding state, the compressed air output by the pump mechanism flows upward through the vertical pipe 409. The airflow pressure overcomes the elastic force of the second spring 501, pushing the conical block 502 upward. An annular gap is formed between the lower end face of the conical block 502 and the annular block 503, opening the channel of the vertical pipe 409. The compressed air is ejected upward through this gap and enters the inner cavity of the lower mold box 202, acting on the bottom of the product. After the pulsed airflow ends, the second spring 501 pushes the conical block 502 back to its original position, and the vertical pipe 409 closes again.

[0043] like Figure 7 As shown, it also includes a vertical micro-movement component, which includes a threaded rod, a threaded sleeve 801, a toothed ridge 802, and a second toothed rack 803.

[0044] The threaded rod is rotatably connected to the lower end of the horizontal plate 301, and the upper end of the lifting plate 308 is rotatably connected to the threaded sleeve 801. The lifting plate 308 is provided with a through hole, through which the threaded rod passes and is threadedly engaged with the threaded sleeve 801. Multiple toothed ridges 802 are fixedly connected to the outer wall of the threaded sleeve 801. A second rack 803 is fixedly connected to one of the rectangular plates 702, and the second rack 803 meshes with the toothed ridge 802.

[0045] When the rectangular plate 702 translates, the second rack 803 pushes the toothed edge 802 to rotate, and the toothed edge 802 drives the threaded sleeve 801 to rotate. Since the threaded rod is restricted by the horizontal plate 301 and cannot move axially, the rotation of the threaded sleeve 801 is converted into the axial micro-displacement of the lifting plate 308 through the threaded pair, so that the lifting plate 308 rises and falls slightly relative to the horizontal plate 301. The rise and fall of the lifting plate 308 drives the lower pressure block 302 to generate a slight additional vertical movement during the demolding process, forming a three-axis linkage with the rotation micro-motion and air blowing demolding.

[0046] like Figure 10 As shown, the rotating rod 303 has a cylindrical cavity inside, and a circular block 602 is slidably connected inside the cylindrical cavity. A linear cylinder 601 is installed at the top of the cylindrical cavity. The telescopic end of the linear cylinder 601 is fixedly connected to the circular block 602. The outer side of the cylindrical cavity has multiple axially extending strip-shaped openings. Multiple thin rods 603 are fixedly connected to the circular block 602. The multiple thin rods 603 all pass through the corresponding strip-shaped openings and are all fixedly connected to an annular blade 604 on the outer side of the rotating rod 303.

[0047] After the hot pressing and cooling process is completed and before the demolding action, the linear cylinder 601 drives the circular block 602 to move downward in the cylindrical cavity. The circular block 602 drives the annular blade 604 to move downward along the outer wall of the rotating rod 303 through the thin rod 603 to trim the opening of the molded product inside the mold. After the trimming is completed, the linear cylinder 601 retracts, the circular block 602 moves upward, and the annular blade 604 retracts into the rotating rod 303 through the strip opening along with the thin rod 603, without interfering with the subsequent demolding action.

[0048] The functional principle of this invention can be explained through the following operational methods: The feeding frame 102 unfolds and continuously conveys the plastic film roll. When the plastic film passes through the heating mechanism 106, it is heated to a highly elastic and softened state, and then enters the station above the hot pressing mechanism.

[0049] Hydraulic cylinder 103 drives horizontal plate 301 downward. Horizontal plate 301 drives lifting plate 308 downward via telescopic rod. Lifting plate 308 drives rotating rod 303 and lower pressing block 302 downward into lower mold box 202. Lower pressing block 302 cooperates with lower mold box 202 to hot press the softened plastic film into a cup shape. During the hot pressing process, the conical block 502 of the self-sealing component seals the vertical tube 409 under the action of the second spring 501, ensuring the airtightness of the cavity of lower mold box 202 and ensuring molding quality.

[0050] After hot pressing and proper cooling, the linear cylinder 601 inside the rotating rod 303 actuates, driving the circular block 602 downwards. This block, via the thin rod 603, causes the annular blade 604 to extend downwards along the outer wall of the rotating rod 303, trimming the excess material at the mouth of the molded cup. After trimming, the linear cylinder 601 resets, and the annular blade 604 retracts into the rotating rod 303.

[0051] After the trimming is completed, the demolding stage begins. Two dual-axis cylinders 701 operate simultaneously, driving two rectangular plates 702 to move horizontally. This horizontal movement produces the following three simultaneous effects: (1) Rotational micro-motion: The first rack 703 on the rectangular plate 702 pushes the rotating gear 304 to rotate, causing the rotating rod 303 and the lower pressure block 302 to rotate slightly; the rotating rod 303 drives the fixed gear 307 to revolve around the axis of the rotating rod 303 through the fixed plate 305 and the vertical rod 306. The fixed gear 307 does not rotate on its own. During the revolution, its tooth surface pushes the internal tooth 204, driving the rotating ring 203 to drive the lower mold box 202 and the lower pressure block 302 to rotate slightly in the same direction. The formed cup body rotates in the same direction with the lower mold box 202. At the same time, the lower pressure block 302 applies a constraint to the upper part of the cup body, so that the cup mouth and the side wall of the lower mold box 202 generate a relative rotational displacement, breaking the static friction and adsorption force between the two.

[0052] (2) Pulse air cushion: The rectangular plate 702 drives the moving plate 406 to move in the strip box 402 through the connecting rod 404, compressing the first spring 407. The first spring 407 pushes the piston plate 408 to compress air. The compressed air is output through the hose 401, cavity 410, rotary joint 405 and vertical pipe 409. The pressure of the compressed air overcomes the elastic force of the second spring 501, pushes the conical block 502 to move upward and open the vertical pipe 409 channel. The compressed air is sprayed upward and forms a pulse air cushion at the bottom of the lower mold box 202, which evenly lifts the molded cup body.

[0053] (3) Vertical micro-movement: The second rack 803 on the rectangular plate 702 pushes the toothed edge 802 to rotate, and the toothed edge 802 drives the threaded sleeve 801 to rotate. The threaded engagement between the threaded sleeve 801 and the threaded rod causes the lifting plate 308 to rise slightly relative to the horizontal plate 301, which causes the lower pressure block 302 to generate additional micro-displacement in the vertical direction during the demolding process, so that the lower pressure block 302 and the molded cup body can achieve flexible separation.

[0054] The three linkage effects are superimposed simultaneously, and the formed cup body is smoothly, evenly and reliably ejected from the lower mold box 202 under the combined action of rotational relative displacement, bottom pulse air cushion and slight lifting of the lower pressure block.

[0055] After demolding, the hydraulic cylinder 103 resets and drives the horizontal plate 301 to rise, which in turn moves the upper mold mechanism 300 upward. The molded cup is then suspended above the lower mold box 202 at a predetermined position after being lifted by the pulse air cushion. The robotic arm of the material picking mechanism 105 extends into the suspended position, picks up the molded cup, and completes the stacking.

[0056] Subsequently, the dual-axis cylinder 701 returns to its original position, the rectangular plate 702 moves back, and all transmission components reset; the one-way valve on the air inlet pipe 403 opens to replenish air, preparing for the next working cycle, and the feeding frame 102 continues to convey new plastic film, entering the next working cycle.

[0057] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fully automatic thermoforming machine, characterized in that, include: The upper mold mechanism (300) and the lower mold mechanism (200) are provided, wherein the upper mold mechanism (300) is provided with a lower pressing block (302) and the lower mold mechanism (200) is provided with a lower mold box (202). A driving component, the driving component including a driving source and a translational transmission component driven by the driving source to perform translational motion; The micro-rotation assembly includes a first micro-rotation input component connected to the rotating shaft of the lower pressure block (302), and a second micro-rotation output component fixed on the lower mold box (202). The first micro-rotation input component and the second micro-rotation output component are connected in a transmission manner. The air pump demolding assembly includes an air jet channel communicating with the bottom of the lower mold box (202) and an air pumping mechanism linked with the translation transmission component; During the demolding stage, the drive source drives the translation transmission component to translate, causing the lower pressure block (302) to rotate, and the mold box (202) rotates through the linkage of the first micro-rotation input component and the second micro-rotation output component; at the same time, the translation transmission component drives the air pumping mechanism to pump air into the air jet channel for demolding.

2. The fully automatic thermoforming machine according to claim 1, characterized in that: The driving source is two dual-axis cylinders (701) installed on the lifting plate (308), and the translation transmission component is a rectangular plate (702) fixedly connected to the telescopic ends of the two dual-axis cylinders (701). The lower pressure block (302) is fixedly connected to the lower end of the rotating rod (303), and a rotating gear (304) is fixedly connected to the rotating rod (303). The adjacent sides of the two rectangular plates (702) are fixedly connected to a first rack (703) that meshes with the rotating gear (304).

3. The fully automatic thermoforming machine according to claim 2, characterized in that: The first micro-rotary input component includes a fixing plate (305) fixedly connected to the rotating rod (303), a vertical rod (306) fixedly connected to the lower end of the fixing plate (305), and a fixing gear (307) fixedly connected to the lower end of the vertical rod (306). The second micro-rotation output component includes a rotating ring (203) fixedly connected to the outer wall of the lower mold box (202). The upper end of the rotating ring (203) is provided with an annular groove, and the inner wall of the annular groove is fixedly connected with an internal tooth (204) that meshes with the fixed gear (307).

4. The fully automatic thermoforming machine according to claim 2, characterized in that: The air pumping mechanism includes a strip box (402) fixedly connected to the lifting plate (308). A movable plate (406) and a piston plate (408) are slidably connected inside the strip box (402). The movable plate (406) and the piston plate (408) are elastically connected by a first spring (407). The movable plate (406) and the rectangular plate (702) are fixedly connected by a connecting rod (404). The jet duct includes a cavity (410) opened in a rectangular box (201) and a vertical pipe (409) connected to the lower end of the lower mold box (202). The strip box (402) and the cavity (410) are connected by a flexible hose (401). A rotary joint (405) is installed at the bottom of the inner side of the rectangular box (201). The lower end of the vertical pipe (409) is connected to the cavity (410) through the rotary joint (405). The strip box (402) is connected to an air inlet pipe (403), and both the air inlet pipe (403) and the hose (401) are equipped with one-way valves.

5. The fully automatic thermoforming machine according to claim 4, characterized in that: It also includes a vertical micro-movement component, which includes a threaded rod rotatably connected to the lower end of the horizontal plate (301), a threaded sleeve (801) rotatably connected to the upper end of the lifting plate (308), a through hole provided on the lifting plate (308), the threaded rod passing through the through hole, and a plurality of toothed ridges (802) fixedly connected to the outer wall of the threaded sleeve (801), one of which is a second rack (803) fixedly connected to the rectangular plate (702) and meshing with the toothed ridge (802).

6. The fully automatic thermoforming machine according to claim 4, characterized in that: Each of the vertical tubes (409) is provided with a self-closing component, the self-closing component including an annular block (503) fixedly connected inside the vertical tube (409), a conical block (502) slidably connected inside the vertical tube (409), the conical block (502) and the annular block (503) being elastically connected by a second spring (501), the upper end face radius of the conical block (502) being the same as the radius of the vertical tube (409); When there is no airflow in the vertical tube (409), the conical block (502) closes the vertical tube (409), and the upper end face of the conical block (502) is flush with the inner bottom of the lower mold box (202); in the jet demolding state, the airflow pushes the conical block (502) upward to open the vertical tube (409).

7. The fully automatic thermoforming machine according to claim 2, characterized in that: Each of the rotating rods (303) has a cylindrical cavity, and a circular block (602) is slidably connected in each cylindrical cavity. A linear cylinder (601) is installed at the top of each cylindrical cavity. The telescopic end of each linear cylinder (601) is fixedly connected to the circular block (602). Multiple strip-shaped openings are provided on the outside of the cylindrical cavity. Multiple thin rods (603) are fixedly connected to the circular block (602). The multiple thin rods (603) pass through the corresponding strip-shaped openings and are jointly fixedly connected to an annular blade (604).

8. The fully automatic thermoforming machine according to claim 5, characterized in that: It also includes a frame (101) and a feeding frame (102). The frame (101) is provided with a heating mechanism (106), a hot pressing mechanism and a material picking mechanism (105) from left to right. A hydraulic cylinder (103) is installed at the upper end of the frame (101). The horizontal plate (301) is fixedly connected to the telescopic end of the hydraulic cylinder (103). The lower end of the horizontal plate (301) is connected to the lifting plate (308) through multiple telescopic rods. A fixed seat (104) is fixedly connected to the inner bottom of the frame (101). The rectangular box (201) is fixedly connected to the fixed seat (104). The upper end of the rectangular box (201) is provided with multiple round openings for rotating and installing the lower mold box (202).

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