A plastic sheet vacuum forming and cutting device

Abstract

The application discloses a plastic sheet suction forming and cutting equipment, and relates to the technical field of plastic product processing, which comprises a processing table, a lifting cutting tool and a plastic product positioning die; the plastic product positioning die is slidably arranged on the processing table; the equipment further comprises a waste negative pressure adsorption mechanism and a waste storage mechanism; the waste negative pressure adsorption mechanism is arranged on the lifting cutting tool in a matched mode; and the waste negative pressure adsorption mechanism comprises a controllable negative pressure pipeline and a negative pressure suction head. The negative pressure suction head distributed on the lifting cutting tool adsorbs the plastic sheet waste generated in the cutting process, and the negative pressure suction head with the adsorbed plastic sheet waste is lifted synchronously with the lifting cutting tool; after being lifted to a corresponding height, the controllable negative pressure pipeline is automatically disconnected to eliminate the negative pressure adsorption effect of the negative pressure suction head, the waste after the plastic sheet is cut falls into the waste storage mechanism automatically, and the working efficiency and the operation convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of plastic product processing technology, and in particular to a cutting device for plastic sheet vacuum forming. Background Technology

[0002] Vacuum forming is a common method for processing plastic products. It involves placing a plastic sheet of a certain length and width into a vacuum forming machine, and through processes such as heating and softening, and vacuum adsorption, forming multiple plastic boxes, cup lids, and other vacuum-formed products arranged in an array on the sheet. After forming, there are continuous edge connections between the products and between the products and the sheet edges, requiring a cutting process to separate the individual formed products from the sheet.

[0003] In existing technology, cutting equipment usually relies on manual labor to lay the plastic sheet that has undergone thermoforming onto a matching mold, then slide the mold under the cutting blade, start the equipment, and rely on the cutting blade to descend and complete the cutting. After the cutting is completed, the product is pulled out of the mold and the operator takes it out.

[0004] However, after cutting, the edges of the plastic sheets are usually excess scrap. Current traditional waste disposal methods rely heavily on manual cleaning after each cut, peeling the scrap off the mold, and then transferring it to a designated recycling location for later centralized processing. This increases the labor intensity of manual cleaning and also lengthens the entire cutting process, leading to reduced overall efficiency. Therefore, how to achieve automatic adsorption, transfer, and recycling of post-cut waste, reducing manual intervention and improving the automation level of cutting equipment, is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a cutting device for plastic sheet vacuum forming, so as to solve the technical problem that the waste disposal is not convenient enough when cutting plastic sheet vacuum forming, which leads to a reduction in the overall cutting efficiency.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A cutting device for plastic sheet vacuum forming includes a processing table, a lifting cutting blade, and a plastic product positioning mold; the plastic product positioning mold is slidably disposed on the processing table, and further includes: A waste material negative pressure adsorption mechanism is configured to work on the lifting cutting blade. The mechanism includes a controllable negative pressure pipe and a negative pressure suction head. The suction head adsorbs the plastic waste separated during the cutting process as the lifting cutting blade descends to cut the plastic product, and carries the waste up with it as the cutting blade rises. The controllable negative pressure pipe disconnects the negative pressure line when the cutting blade reaches a set height, allowing the suction head to release the waste. The waste storage mechanism is arranged below the negative pressure suction head; when the lifting cutting blade is raised, the plastic product positioning mold slides out from below the lifting cutting blade, and the waste released by the negative pressure suction head falls into the waste storage mechanism.

[0007] Preferably, the controllable negative pressure pipeline includes a negative pressure main pipeline, a sealing baffle, and a limiting block; the negative pressure main pipeline is connected to distributed negative pressure suction heads; the negative pressure main pipeline rises and falls synchronously with the lifting cutting blade; the sealing baffle slides vertically through the upper surface of the negative pressure main pipeline; a first support spring is connected between the sealing baffle and the outer wall of the negative pressure main pipeline; the limiting block is aligned and fitted above the sealing baffle.

[0008] Preferably, the controllable negative pressure pipeline further includes a pressure balancing port, a sealing rotating plate, and a push rod. The pressure balancing port is located on the lower surface of the main negative pressure pipeline and is situated in the passage between the sealing baffle and the negative pressure suction head. An auxiliary insert plate is slidably inserted into the sealing baffle, and a second support spring is connected between the auxiliary insert plate and the bottom of the sealing baffle. The push rod slidably penetrates the upper sidewall of the main negative pressure pipeline. The bottom end of the push rod is aligned with the pressure balancing port, and the top end is fixedly connected to the auxiliary insert plate. The sealing rotating plate is movably connected to the outside of the pressure balancing port via a spring-loaded hinge.

[0009] Preferably, multiple negative pressure suction heads are provided and distributed on the edge of the lifting cutting blade. Each negative pressure suction head includes a vertical suction tube and an elastic pushing mechanism. The vertical suction tube is connected to the lifting cutting blade and is connected to the negative pressure main pipe. The elastic pushing mechanism is located at the bottom of the vertical suction tube.

[0010] Preferably, the elastic pushing mechanism includes an auxiliary spring, a top ring, and a built-in tube head. The built-in tube head is coaxially fixedly connected to the inner bottom of the vertical straw. Multiple auxiliary springs are provided and are circumferentially distributed between the vertical straw and the built-in tube head. The top ring is aligned with the bottom of the vertical straw, and one end of each auxiliary spring is fixedly connected to the inner wall of the vertical straw, and the other end is fixedly connected to the top ring.

[0011] Preferably, the lifting cutting tool includes a lifting drive seat and a tool holder. An electric push rod is fixedly mounted on the processing table, and the lifting drive seat is fixedly mounted on the telescopic end of the electric push rod. The tool holder is fixedly mounted on the bottom of the lifting drive seat, and the bottom of the tool holder is distributed with blades that cooperate with the positioning mold of the plastic product.

[0012] Preferably, the waste negative pressure adsorption mechanism further includes a slide and a first limiting spring; the slide is disposed between the lifting drive seat and the blade seat, a positioning column is vertically fixedly connected between the lifting drive seat and the blade seat, the slide is slidably sleeved on the positioning column, and a first limiting spring is also connected between the slide and the positioning column; the negative pressure suction head is fixedly connected to the slide, and the bottom end of the negative pressure suction head is lower than the position of the blade body.

[0013] Preferably, the plastic product positioning mold includes a positioning mold plate, a support guide rail, and a linkage push-pull mechanism. The support guide rail is horizontally fixedly connected to the processing table, and the positioning mold plate is slidably connected to the support guide rail. A limiting block is fixedly provided on the support guide rail, which allows the positioning mold plate to stop directly below the lifting cutting tool. During the lifting process, the lifting cutting tool drives the positioning mold plate to move laterally along the support guide rail by means of the linkage push-pull mechanism.

[0014] Preferably, the linkage push-pull mechanism includes a linkage rod, a lifting frame, and an auxiliary guide rail; the auxiliary guide rail is fixedly disposed on one side of the lifting cutting tool, the lifting frame is slidably connected to the auxiliary guide rail, and a second limiting spring is connected between the lifting frame and the auxiliary guide rail; one end of the linkage rod is rotatably connected to the lifting frame, and the other end is rotatably connected to the positioning mold plate.

[0015] Preferably, the waste storage mechanism includes a recycling bin, a side pressure plate, and an extrusion rod; the recycling bin is located below the processing table and aligned with the position of the negative pressure suction head; the recycling bin has an opening on the side near the positioning mold plate, the side pressure plate is vertically fitted on the opening side of the recycling bin, and the bottom of the side pressure plate is movably connected to the recycling bin via a spring-loaded hinge; the extrusion rod is parallel to one side of the side pressure plate, and the extrusion rod slides synchronously with the plastic product positioning mold.

[0016] The beneficial effects of this invention are: 1. This invention uses negative pressure suction heads distributed on the lifting cutting blade to adsorb the plastic sheet waste generated during the cutting process. The negative pressure suction heads, carrying the adsorbed plastic sheet waste, rise synchronously with the lifting cutting blade, facilitating the sliding of the plastic product positioning mold. At the same time, after rising to the corresponding height, the controllable negative pressure pipeline is automatically disconnected to eliminate the negative pressure adsorption effect of the negative pressure suction heads, allowing the waste plastic sheet after cutting to automatically fall into the waste storage mechanism. This achieves automatic separation and recycling of cutting waste and finished products, improving work efficiency and ease of operation.

[0017] 2. As the lifting cutting blade descends, the controllable negative pressure pipeline of this invention remains connected, facilitating the negative pressure suction head to generate negative pressure to adsorb waste. When the controllable negative pressure pipeline rises to the set height with the lifting cutting blade, the set sealing baffle comes into contact with the limit block, and the sealing baffle is inserted into the negative pressure main pipeline, cutting off its passage. At the same time, it also drives the set top rod to descend and open the sealing rotating plate at the air pressure balance port, which facilitates the air pressure balance inside and outside the negative pressure suction head and eliminates the negative pressure, making it easy to automatically release waste. The operation is reliable and stable.

[0018] 3. During the descent of the lifting cutting blade, the linkage rod pushes the positioning mold plate to move laterally along the support guide rail, so that the positioning mold plate with the plastic sheet laid on it automatically slides to directly below the lifting cutting blade for cutting. When the lifting cutting blade rises, the linkage rod can drive the positioning mold plate to slide back and reset, so that the positioning mold plate automatically slides in and out, avoiding obstruction of waste material being put into the recycling bin.

[0019] 4. During the process of the lifting and cutting blade of the present invention moving the positioning mold plate horizontally to its direct below each time it descends, the positioning mold plate drives the set extrusion rod to move synchronously and extrude the side pressure plate on one side of the recycling box, so that the side pressure plate flips and presses into the recycling box, compacting the previously fallen plastic waste together and improving the space utilization rate of the recycling box. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure in which the lifting cutting tool and the plastic product positioning mold are connected in this invention; Figure 3 This is a schematic diagram of the controllable negative pressure pipeline in this invention; Figure 4 This is a schematic diagram showing the state of the sealing baffle blocking the negative pressure main pipeline in this invention; Figure 5 This is a schematic diagram showing the state of the negative pressure main pipeline where the sealing baffle in this invention is not sealed; Figure 6 This is a schematic diagram of the connection between the negative pressure suction head and the blade holder in this invention; Figure 7 This is a schematic diagram of the connection between the blade body and the blade holder in this invention; Figure 8 This is a schematic diagram of the negative pressure suction head in this invention; Figure 9 This is a schematic cross-sectional view of the connection between the top ring and the vertical suction tube in this invention. Figure 10 This is a schematic diagram of the state when the vertical suction tube sucks up the waste material in this invention; Figure 11 This is a schematic diagram of the structure in which the tool holder and the positioning mold plate are connected in this invention; Figure 12 This is a cross-sectional structural diagram showing the relative positions of the tool holder, positioning mold plate, and recycling box before the tool holder descends in this invention. Figure 13 This is a schematic diagram of the state when the tool holder descends and docks with the positioning mold plate in this invention; Figure 14 This is a schematic diagram of the structure in this invention where the extrusion rod presses the side pressure plate and rotates to press it into the recycling box.

[0021] Explanation of reference numerals in the attached figures: 1. Processing table; 2. Lifting cutting tool; 21. Electric push rod; 22. Lifting drive seat; 23. Tool holder; 24. Tool body; 25. Positioning column; 3. Plastic product positioning mold; 31. Positioning mold plate; 32. Linkage rod; 33. Support guide rail; 34. Lifting frame; 35. Auxiliary guide rail; 4. Waste material storage mechanism; 41. Recycling bin; 42. Side pressure plate; 43. Extrusion rod; 5. Lifting and picking mechanism; 6. 61. Waste negative pressure adsorption mechanism; 61. Controllable negative pressure pipeline; 611. Negative pressure main pipeline; 612. Limiting block; 613. Sealing rotating plate; 614. Top rod; 615. Sealing partition; 616. Auxiliary insert plate; 617. Air pressure balance port; 62. Negative pressure suction head; 621. Vertical suction tube; 622. Auxiliary spring; 623. Top ring; 624. Built-in tube head; 63. Slide seat; 64. First limiting spring. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0023] like Figures 1 to 14As shown, a cutting device for plastic sheet vacuum forming is used to cut out plastic boxes that have already been vacuum-formed from plastic sheets. During the vacuum forming process, a plastic sheet of a certain length and width is placed in the vacuum forming equipment for vacuum forming, resulting in multiple vacuum-formed plastic boxes on the sheet. These boxes are then cut and separated. Of course, the vacuum-formed products are not limited to plastic boxes; other vacuum-formable products, such as plastic cup lids, can also be used. The cutting device includes a processing table 1 and a lifting... The lowering cutting blade 2 and the plastic product positioning mold 3 are used to position and place the plastic product to be cut and separated. The plastic product positioning mold 3 is slidably set on the processing table 1. When the plastic product needs to be cut, the plastic product positioning mold 3 slides to the bottom of the lifting cutting blade 2. After the cutting is completed, the plastic product positioning mold 3 can slide out from under the lifting cutting blade 2. The lifting cutting blade 2 is used to cut the plastic product positioned on the plastic product positioning mold 3. The processing table 1 also supports and installs various components. The cutting equipment also includes a waste negative pressure adsorption mechanism 6 and a waste storage mechanism 4; the waste negative pressure adsorption mechanism 6 is installed on the lifting cutting blade 2, and includes a controllable negative pressure pipe 61 and a negative pressure suction head 62. The negative pressure suction head 62 is used to adsorb the plastic waste separated during the cutting process of the lifting cutting blade 2 descending to cut the plastic product, and to carry the waste up with it as the lifting cutting blade 2 rises; the controllable negative pressure pipe 61 is used to disconnect the negative pressure pipe when the lifting cutting blade 2 rises to a set height, so that the negative pressure suction head 62 releases the waste; The waste storage mechanism 4 is positioned below the negative pressure suction head 62, and a notch is provided above the processing table 1 aligned with the waste storage mechanism 4 to facilitate the passage of waste as it falls. When the lifting cutting blade 2 is raised, the plastic product positioning mold 3 slides out from below the lifting cutting blade 2, and the waste released by the negative pressure suction head 62 falls into the waste storage mechanism 4, thus realizing automatic separation and recycling of waste.

[0024] In some specific implementation plans, combined with Figures 2 to 4As shown, the controllable negative pressure pipeline 61 includes a negative pressure main pipeline 611, a sealing baffle 615, and a limiting block 612; one end of the negative pressure main pipeline 611 is connected to the suction end of the negative pressure pump set on the processing table 1 through a hose, and the other end is connected to the distributed negative pressure suction heads 62 through a pipe; the negative pressure main pipeline 611 rises and falls synchronously with the lifting cutting blade 2; the sealing baffle 615 slides vertically through the upper surface of the negative pressure main pipeline 611, and the size of the sealing baffle 615 is consistent with that of the negative pressure main pipeline 611. The internal dimensions of the pipe 611 are adapted, allowing the negative pressure main pipe 611 to be a square tube. When the sealing baffle 615 is inserted into the negative pressure main pipe 611, it can effectively isolate the inside of the negative pressure main pipe 611. A compressible first support spring is connected between the sealing baffle 615 and the outer wall of the negative pressure main pipe 611. The limiting block 612 is aligned and fitted above the sealing baffle 615, and the limiting block 612 is fixedly set at the corresponding height position relative to the processing table 1.

[0025] During the process of the lifting cutting blade 2 descending to cut the plastic product, the negative pressure main pipe 611 descends synchronously with it. During this process, the sealing baffle 615 separates from the limiting block 612. Under the support of the first support spring, the sealing baffle 615 is not fully inserted into the negative pressure main pipe 611, that is, the negative pressure main pipe 611 is in a passable state. At this time, the distributed negative pressure suction heads 62 are connected to the negative pressure main pipe 611, and can generate negative pressure under the action of the negative pressure pump connected to the negative pressure main pipe 611, thus adsorbing the cutting waste; then the lifting cutting blade... 2. During the lifting process, the negative pressure suction head 62 can rise synchronously with the adsorbed waste. When the sealing baffle 615 on the negative pressure main pipe 611 rises to the position of the limit block 612, a squeezing effect is generated between the sealing baffle 615 and the fixed limit block 612. During this process, the sealing baffle 615 is inserted into the negative pressure main pipe 611. Finally, the sealing baffle 615 isolates the inside of the negative pressure main pipe 611, that is, it disconnects the passage between the negative pressure suction head 62 and the negative pressure pump, thereby causing the negative pressure suction head 62 to lose its continuous negative pressure adsorption function.

[0026] In a further specific implementation plan, refer to Figures 3 to 5As shown, the controllable negative pressure pipeline 61 also includes a pressure balance port 617, a sealing rotating plate 613, and a push rod 614. The pressure balance port 617 is located on the lower surface of the negative pressure main pipeline 611 and is situated on the side of the sealing baffle 615 near the negative pressure suction head 62, i.e., in the passage between the sealing baffle 615 and the negative pressure suction head 62. An auxiliary insert plate 616 is slidably inserted into the sealing baffle 615, and a second support spring is connected between the auxiliary insert plate 616 and the bottom of the sealing baffle 615. It should be noted that when the force condition for the first support spring to deform is reached, the second support spring does not deform. The top rod 614 slides through the upper side wall of the negative pressure main pipe 611; the bottom end of the top rod 614 is aligned with the air pressure balance port 617, and the top end is fixedly connected to the auxiliary insert plate 616. It should be noted that, in order to facilitate the connection between the auxiliary insert plate 616 and the top end of the top rod 614, the top end of the auxiliary insert plate 616 can be bent to a horizontal position; the sealing rotating plate 613 is fitted and set on the outside of the air pressure balance port 617, and one side of the sealing rotating plate 613 is movably connected to the edge of the air pressure balance port 617 through a spring hinge. Under no external force, the sealing rotating plate 613 fits and seals the air pressure balance port 617.

[0027] When the negative pressure main pipeline 611 is not blocked by the sealing baffle 615 and is normally pumped by the internal suction of the negative pressure pump, the sealing plate 613 adheres to and seals the pressure balance port 617, and can remain tightly adhered under negative pressure to ensure the sealing effect. When the top of the sealing baffle 615 presses against the limiting block 612, the first support spring between the sealing baffle 615 and the negative pressure main pipeline 611 is compressed, and the sealing baffle 615 is inserted into the negative pressure main pipeline 611. Before the sealing baffle 615 is fully inserted, the second support spring does not compress. During this process, the push rod 614 and the sealing baffle 615 descend synchronously relative to the negative pressure main pipeline 611, but do not contact the pressure balance port 617. When the sealing baffle 615 completely blocks the negative pressure main pipeline 611, the sealing baffle 615 is obstructed and cannot continue to block the negative pressure main pipeline 611. 1. During the movement, the squeezing action continues. The auxiliary insert plate 616 is inserted into the sealing partition 615 and compresses the second support spring. At this time, the push rod 614 passes through the air pressure balance port 617 and pushes the sealing rotating plate 613. Since the sealing partition 615 has isolated the negative pressure main pipe 611, the negative pressure can be prevented from continuing to act on the sealing rotating plate 613, thus making it easier for the push rod 614 to open the sealing rotating plate 613. In this way, the air pressure balance port 617 is connected to the external space, thus making the pipeline where the negative pressure suction head 62 is located, which has lost the negative pressure effect, connected to the external environment. This facilitates the balance of air pressure inside and outside the negative pressure suction head 62, thus facilitating the fall of the adsorbed waste. This prevents the waste from being adsorbed on the negative pressure suction head 62 and unable to fall off even when the negative pressure main pipe 611 is isolated and the suction effect is eliminated due to the air pressure difference inside and outside the negative pressure suction head 62.

[0028] In some specific implementation schemes, refer to Figures 7 to 9 As shown, multiple negative pressure suction heads 62 are provided and distributed along the edge of the lifting cutting blade 2. When cutting the molded plastic product, the main task is to separate the plastic product from the others and cut off the excess material at the edges. This excess material is waste, specifically a rectangular shape. Therefore, by distributing the negative pressure suction heads 62 along the edge of the lifting cutting blade 2, the rectangular waste material can be directly adsorbed. Each negative pressure suction head 62 includes a vertical suction tube 621 and an elastic pushing mechanism. 21 is connected to the lifting cutting blade 2, and the vertical suction tube 621 is connected to the negative pressure main pipe 611 through a pipe. The elastic pushing mechanism is set at the bottom of the vertical suction tube 621. When the vertical suction tube 621 adsorbs the waste material through the negative pressure, the elastic pushing mechanism is in a compressed state. When the vertical suction tube 621 loses the negative pressure, the elastic pushing mechanism releases the elastic force, thereby assisting the pushing of the waste material from the bottom of the vertical suction tube 621, and preventing the plastic waste material from being embedded in the port of the vertical suction tube 621 and making it difficult to detach.

[0029] The elastic pushing mechanism includes an auxiliary spring 622, a top ring 623, and a built-in tube head 624. The built-in tube head 624 is coaxially fixedly connected to the bottom inner side of the vertical straw 621, and there is a gap between the outer wall of the built-in tube head 624 and the inner wall of the vertical straw 621. Multiple auxiliary springs 622 are provided and are circumferentially distributed between the vertical straw 621 and the built-in tube head 624. The top ring 623 is aligned and set at the bottom of the vertical straw 621, and one end of each auxiliary spring 622 is fixedly connected to the inner wall of the vertical straw 621, and the other end is fixedly connected to the top ring 623. It should be noted that the top ring 623 can close the space between the vertical straw 621 and the built-in tube head 624, and the space between the vertical straw 621 and the built-in tube head 624 is also connected to the upper space of the vertical straw 621. The auxiliary springs 622 are compressible.

[0030] When the vertical suction tube 621 descends with the lifting cutting blade 2 and touches the edge of the plastic sheet, the top ring 623 is squeezed and adheres to the bottom of the vertical suction tube 621, and compresses and stores the auxiliary spring 622 between the built-in tube head 624 and the vertical suction tube 621. At this time, the area where the built-in tube head 624 is located is open, which facilitates the generation of negative pressure to adsorb the plastic waste generated during cutting. At the same time, the negative pressure can also effectively keep the top ring 623 adhered to the bottom of the vertical suction tube 621, and will not easily release the rebound force of the auxiliary spring 622, causing the waste to fall off accidentally. Only when the negative pressure pipeline connected to the vertical suction tube 621 is disconnected, the auxiliary spring 622 releases the rebound force, and the top ring 623 pushes the waste away from the bottom of the vertical suction tube 621.

[0031] In some specific implementations, the lifting cutting tool 2 includes a lifting drive seat 22 and a tool holder 23. An electric push rod 21 is fixedly mounted on the processing table 1 by a mounting bracket, with the telescopic end of the electric push rod 21 facing downwards. The lifting drive seat 22 is fixedly mounted on the telescopic end of the electric push rod 21. The lifting drive seat 22 is driven by the electric push rod 21 to lift and lower. The lifting drive seat 22 also cooperates with a guide column vertically fixed on the processing table 1 through a guide sleeve. The tool holder 23 is fixedly mounted at the bottom of the lifting drive seat 22. The bottom of the tool holder 23 has blades 24 that cooperate with the plastic product positioning mold 3. The vertical suction tubes 621 of each negative pressure suction head 62 slide vertically through the edge of the tool holder 23, and the number of them is set according to actual needs. Each vertical suction tube 621 is connected to the negative pressure main pipe 611 through a pipe distributed along the edge of the tool holder 23.

[0032] In some other specific implementations, in order to ensure that the negative pressure suction head 62 presses down on the plastic waste and effectively sucks it up, the waste negative pressure adsorption mechanism 6 also includes a slide 63 and a first limiting spring 64; the slide 63 is disposed between the lifting drive seat 22 and the blade seat 23, and a positioning post 25 is vertically fixedly connected between the lifting drive seat 22 and the blade seat 23, and two positioning posts 25 are distributed in pairs. The slide 63 is slidably sleeved on the positioning post 25, and the first limiting spring 64 is also connected between the slide 63 and the positioning post 25; the negative pressure suction head 62 is fixedly connected to the slide 63, and the bottom end of the negative pressure suction head 62 is lower than the position of the blade body 24.

[0033] When the lifting drive seat 22 lowers the blade 24 on the blade holder 23 to cut, the distributed negative pressure suction heads 62 first come into contact with the plastic material. Then, as the lifting drive seat 22 continues to drive the blade holder 23 and blade 24 to descend, the slide 63 slides upward relative to the positioning post 25 and compresses the first limit spring 64. Finally, the blade 24 cuts the plastic material, while the negative pressure suction heads 62 rely on the rebound force of the first limit spring 64 to press the plastic material firmly, which is convenient for adsorption by negative pressure and easy to pick up later.

[0034] In some specific implementation schemes, refer to Figure 2 and Figure 11As shown, the plastic product positioning mold 3 includes a positioning mold plate 31, a support guide rail 33, and a linkage push-pull mechanism. The support guide rail 33 is horizontally fixedly connected to the processing table 1. The support guide rails 33 are distributed in pairs on both sides of the notch position on the processing table 1. The positioning mold plate 31 is slidably connected to the support guide rail 33. A limiting block is fixedly provided on the support guide rail 33, which allows the positioning mold plate 31 to stop directly below the lifting cutting blade 2. The positioning mold plate 31 has multiple positioning cavities that match the number of plastic products vacuum-formed on the plastic sheet. The entire plastic sheet is placed on the positioning mold plate. When the cutting tool 2 is in place, the molded plastic products distributed on the plastic sheet are embedded into the respective positioning cavities. It should also be noted that when a plastic product is a square plastic box, the shape of the positioning cavity matches it, and the blade 24 is also matched accordingly. The blade 24 is a hollow square frame, and the length and width of the blade 24 are slightly larger than the length and width of the positioning cavity. During cutting, the edge of the blade 24 of each square frame cuts exactly between two adjacent plastic products, achieving separation. During the lifting and lowering process, the lifting cutting tool 2 drives the positioning mold plate 31 to move laterally along the support guide rail 33 by means of a linkage push-pull mechanism.

[0035] The linkage push-pull mechanism includes a linkage rod 32, a lifting frame 34, and an auxiliary guide rail 35. The auxiliary guide rail 35 is fixedly installed on one side of the lifting cutting blade 2, specifically vertically fixed to the upper surface of the blade holder 23. The lifting frame 34 is slidably connected to the auxiliary guide rail 35, and a second limiting spring is connected between the lifting frame 34 and the auxiliary guide rail 35. The second limiting spring is a compressible spring and is located between the top of the lifting frame 34 and the auxiliary guide rail 35. One end of the linkage rod 32 is rotatably connected to the lifting frame 34 via a rotating shaft, and the other end is rotatably connected to the positioning mold plate 31 via a rotating shaft. The linkage rod 32 is set in an inclined state. (See reference for details.) Figure 12 Illustration; and there are two linkage rods 32, symmetrically distributed on both sides of the positioning mold plate 31.

[0036] When the cutter holder 23 of the lifting cutting cutter 2 descends, the cutter holder 23 also lowers synchronously with the lifting frame 34. The lifting frame 34 then pushes the positioning mold plate 31 to slide along the support guide rail 33 downwards from the cutter holder 23 via the inclined linkage rod 32. During this process, the second limit spring does not undergo compression deformation. When the positioning mold plate 31 slides to the limit block on the support guide rail 33 and stops, the positioning mold plate 31 is directly below the lifting cutting cutter 2. At this time, the cutter body 24 on the cutter holder 23 has not yet contacted the product on the positioning mold plate 31. Because the positioning mold plate 31 is obstructed and stops below the cutter body 24 of the cutter holder 23, it cannot... As the lifting frame 34 continues to slide forward, it will no longer be able to descend with the cutter holder 23. If the cutter holder 23 continues to descend, the auxiliary guide rail 35 will slide relative to the lifting frame 34, causing the second limit spring to compress. This allows the cutter holder 23 to continue descending with the cutter body 24 and the distributed negative pressure suction heads 62, thus facilitating the cutter body 24 to complete the cutting and the negative pressure suction heads 62 to absorb the waste material from the edge of the cut plastic sheet. When the lifting cutting cutter 2 rises, it will drive the positioning mold plate 31 to slide back and reset through the linkage rod 32, making it convenient for the operator to remove the cut plastic product from the positioning mold plate 31.

[0037] It should be noted that, in order to facilitate the resetting of the positioning mold plate 31, a spring can also be installed between the positioning mold plate 31 and the support guide rail 33. However, it is necessary to ensure that, under the same stress conditions, the spring between the positioning mold plate 31 and the support guide rail 33 deforms before the second limit spring between the lifting frame 34 and the auxiliary guide rail 35.

[0038] In some specific implementation schemes, refer to Figures 12 to 14 As shown, the waste storage mechanism 4 includes a recycling bin 41, a side pressure plate 42, and an extrusion rod 43. The recycling bin 41 is located below the processing table 1 and aligned with the position of the negative pressure suction head 62. The recycling bin 41 has an opening on the side near the positioning mold plate 31, with the upward-facing side serving as the feed inlet. The side pressure plate 42 is vertically fitted onto the open side of the recycling bin 41, and its bottom is movably connected to the recycling bin 41 via a spring-loaded hinge, maintaining a vertical position initially. The extrusion rod 43 is parallel to one side of the side pressure plate 42 and slides synchronously with the plastic product positioning mold 3, specifically allowing the extrusion rod 43 to be fixedly connected to the positioning mold plate 31. Furthermore, a pulley is installed at the bottom of the extrusion rod 43, and it is positioned higher than the bottom of the side pressure plate 42, which can be adjusted as needed to ensure that after each pressure application by the extrusion rod 43, the side pressure plate 42 flips into the recycling bin 41, maintaining a certain distance between the side pressure plate 42 and the bottom of the recycling bin 41.

[0039] Each time the plastic product positioning mold 3 slides away from the bottom of the lifting cutting blade 2, the negative pressure suction head 62 releases the adsorbed waste material, which can fall directly into the recycling bin 41. When the plastic product positioning mold 3 slides down the lifting cutting blade 2, it drives the set extrusion rod 43 to move horizontally in sync. During the horizontal movement of the extrusion rod 43, it extrudes the side pressure plate 42, causing the side pressure plate 42 to rotate and press against the inside of the recycling bin 41, thereby making it easier to compact the waste material inside together and avoid wasting space between waste materials, which would affect the storage effect.

[0040] It should be noted that the recycling bin 41 is installed under the processing table 1 by a positioning lock and can be detached.

[0041] In addition, in some other solutions, in order to facilitate the neat removal of the cut thermoformed products from the positioning mold plate 31, a lifting and picking mechanism 5 that slides laterally along a track can be set on the processing table 1. The lifting and picking mechanism 5 can be driven by a lifting drive component to lower the suction cups that correspond to the cavities distributed on the positioning mold plate 31, and can also be moved laterally above the positioning mold plate 31 along the set track, and then automatically pick up and unload the products each time, without the need for manual picking up one by one.

[0042] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: A plastic sheet of a certain length and width is placed in a vacuum forming equipment for vacuum forming, thereby obtaining multiple vacuum-formed plastic boxes on the plastic sheet. Then, the plastic sheet is laid on the positioning mold plate 31, so that the formed plastic boxes distributed on the plastic sheet are correspondingly embedded into each positioning cavity.

[0043] Then, the knife holder 23 of the lifting cutting cutter 2 is controlled to descend, and the knife holder 23 and the lifting frame 34 descend synchronously. The lifting frame 34 pushes the positioning mold plate 31 to slide along the support guide rail 33 downwards from the knife holder 23 through the inclined linkage rod 32. During this process, the second limit spring does not undergo compression deformation. When the positioning mold plate 31 slides to the limit block on the support guide rail 33 and stops, the positioning mold plate 31 is exactly below the lifting cutting cutter 2. At this time, the blade 24 on the knife holder 23 has not yet contacted the product on the positioning mold plate 31. Since the positioning mold plate 31 is blocked and aligned, it stops below the blade 24 of the knife holder 23 and cannot continue to slide forward. The lifting frame 34 will also be unable to continue to descend with the knife holder 23. If the knife holder 23 continues to descend, the auxiliary guide rail 35 and the lifting frame 34 will slide relative to each other, causing the second limit spring to compress, so that the knife holder 23 can continue to descend with the blade 24 and the distributed negative pressure suction head 62. As the blade 24 and the negative pressure suction head 62 descend and approach the positioning mold plate 31, the vertical suction tube 621 of the negative pressure suction head 62 first touches the edge of the plastic sheet laid on the positioning mold plate 31. The top ring 623 at the bottom of the vertical suction tube 621 is squeezed and adheres to the bottom of the vertical suction tube 621, and compresses and stores the auxiliary spring 622 between the built-in tube head 624 and the vertical suction tube 621. At this time, the area where the built-in tube head 624 is located is transparent, which facilitates the generation of negative pressure to adsorb the edge of the plastic sheet. Then, as the blade holder 23 continues to descend, it drives the blade 24 to cut towards the plastic sheet, separating the plastic boxes distributed on the plastic sheet from the edge waste.

[0044] Then, when the lifting cutting blade 2 rises, it will drive the positioning mold plate 31 to slide back and reset through the linkage rod 32, making it convenient for the operator to remove the plastic products cut and separated by the positioning mold plate 31. At the same time, the lifting cutting blade 2 will also lift the negative pressure suction head 62, thereby lifting the adsorbed plastic waste together. During this process, the negative pressure main pipe 611 is also lifted synchronously. When the sealing partition 615 on the negative pressure main pipe 611 rises to the position of the limit block 612, the positioning mold plate 31 has been offset from below the lifting cutting blade 2, and at this time, the sealing partition 615 and the fixed limit block 612 begin to exert a squeezing effect. During this process, the sealing partition 615 is inserted into the negative pressure main pipe 611. Finally, the sealing partition 615 isolates the inside of the negative pressure main pipe 611, that is, it cuts off the passage between the negative pressure suction head 62 and the negative pressure pump, thereby causing the negative pressure suction head 62 to lose its continuous negative pressure adsorption function. When the top of the sealing baffle 615 presses against the limiting block 612, the first support spring between the sealing baffle 615 and the negative pressure main pipe 611 is compressed, and the sealing baffle 615 is inserted into the negative pressure main pipe 611. Before the sealing baffle 615 is fully inserted, the second support spring does not compress. During this process, the push rod 614 and the sealing baffle 615 descend synchronously relative to the negative pressure main pipe 611, but do not contact the air pressure balance port 617. When the sealing baffle 615 completely isolates the negative pressure main pipe 611, the sealing baffle 615 is obstructed and cannot continue to move relative to the negative pressure main pipe 611. During this process, the pressing action... If the problem continues, the auxiliary insert plate 616 is inserted into the sealing baffle 615 and compresses the second support spring. At this time, the push rod 614 passes through the air pressure balance port 617 and pushes the sealing rotating plate 613. Since the sealing baffle 615 has isolated the negative pressure main pipe 611, it can prevent the negative pressure from continuing to act on the sealing rotating plate 613, thus making it easier for the push rod 614 to open the sealing rotating plate 613. In this way, the air pressure balance port 617 is connected to the external space, thus making the pipeline where the negative pressure suction head 62 is located, which has lost the negative pressure effect, connected to the external environment. This facilitates the balance of air pressure inside and outside the negative pressure suction head 62, thus facilitating the fall of the adsorbed waste.

[0045] Since the plastic product positioning mold 3 has slid away from the bottom of the lifting cutting blade 2, the waste material released by the negative pressure suction head 62 can fall directly into the recycling bin 41. When the plastic product positioning mold 3 slides down the lifting cutting blade 2 again, it drives the extrusion rod 43 to move horizontally in sync. During the horizontal movement of the extrusion rod 43, it extrudes the side pressure plate 42, causing the side pressure plate 42 to rotate and press against the inside of the recycling bin 41, thereby making it easier to compact the waste material inside together and avoid wasting space between waste materials, which would affect the storage effect.

[0046] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A cutting device for plastic sheet thermoforming, comprising a processing table (1), a lifting cutting blade (2), and a plastic product positioning mold (3); wherein the plastic product positioning mold (3) is slidably disposed on the processing table (1), characterized in that, Also includes: Waste negative pressure adsorption mechanism (6) is configured on the lifting cutting blade (2). The waste negative pressure adsorption mechanism (6) includes a controllable negative pressure pipe (61) and a negative pressure suction head (62). The negative pressure suction head (62) is used to adsorb the plastic waste separated during the cutting process of the lifting cutting blade (2) descending to cut the plastic product, and to carry the waste up with it as the lifting cutting blade (2) rises. The controllable negative pressure pipe (61) is used to disconnect the negative pressure pipe when the lifting cutting blade (2) rises to a set height, so that the negative pressure suction head (62) releases the waste. Waste storage mechanism (4) is set below the negative pressure suction head (62); when the lifting cutting blade (2) is raised, the plastic product positioning mold (3) slides out from below the lifting cutting blade (2), and the waste released by the negative pressure suction head (62) falls into the waste storage mechanism (4).

2. The plastic sheet thermoforming and cutting equipment according to claim 1, characterized in that, The controllable negative pressure pipeline (61) includes a negative pressure main pipeline (611), a sealing baffle (615), and a limiting block (612); the negative pressure main pipeline (611) is connected to distributed negative pressure suction heads (62); the negative pressure main pipeline (611) and the lifting cutting blade (2) move up and down synchronously; the sealing baffle (615) slides vertically through the upper surface of the negative pressure main pipeline (611); a first support spring is connected between the sealing baffle (615) and the outer wall of the negative pressure main pipeline (611); the limiting block (612) is aligned and fitted above the sealing baffle (615).

3. The plastic sheet thermoforming and cutting equipment according to claim 2, characterized in that, The controllable negative pressure pipeline (61) also includes a pressure balancing port (617), a sealing rotating plate (613), and a push rod (614). The pressure balancing port (617) is located on the lower surface of the negative pressure main pipeline (611) and is situated in the passage between the sealing baffle (615) and the negative pressure suction head (62). An auxiliary insert plate (616) is slidably inserted into the sealing baffle (615), and a second support spring is connected between the auxiliary insert plate (616) and the bottom of the sealing baffle (615). The push rod (614) slides through the upper side wall of the negative pressure main pipeline (611). The bottom end of the push rod (614) is aligned with the pressure balancing port (617), and the top end is fixedly connected to the auxiliary insert plate (616). The sealing rotating plate (613) is movably connected to the outside of the pressure balancing port (617) via a spring-loaded hinge.

4. The plastic sheet thermoforming and cutting equipment according to claim 1, characterized in that, Multiple negative pressure suction heads (62) are provided and distributed on the edge of the lifting cutting blade (2). Each negative pressure suction head (62) includes a vertical suction tube (621) and an elastic pushing mechanism. The vertical suction tube (621) is connected to the lifting cutting blade (2) and is connected to the negative pressure main pipe (611). The elastic pushing mechanism is located at the bottom of the vertical suction tube (621).

5. The plastic sheet thermoforming and cutting equipment according to claim 4, characterized in that, The elastic pushing mechanism includes an auxiliary spring (622), a top ring (623), and a built-in tube head (624). The built-in tube head (624) is coaxially fixedly connected to the bottom inner side of the vertical suction tube (621). Multiple auxiliary springs (622) are provided and are circumferentially distributed between the vertical suction tube (621) and the built-in tube head (624). The top ring (623) is aligned and set at the bottom of the vertical suction tube (621). One end of each auxiliary spring (622) is fixedly connected to the inner wall of the vertical suction tube (621), and the other end is fixedly connected to the top ring (623).

6. The plastic sheet thermoforming and cutting equipment according to claim 1, characterized in that, The lifting cutting tool (2) includes a lifting drive seat (22) and a tool holder (23). An electric push rod (21) is fixedly installed on the processing table (1). The lifting drive seat (22) is fixedly installed at the telescopic end of the electric push rod (21). The tool holder (23) is fixedly installed at the bottom of the lifting drive seat (22), and the bottom of the tool holder (23) is distributed with a tool body (24) that cooperates with the plastic product positioning mold (3).

7. The plastic sheet thermoforming and cutting equipment according to claim 6, characterized in that, The waste negative pressure adsorption mechanism (6) also includes a slide (63) and a first limiting spring (64); the slide (63) is disposed between the lifting drive seat (22) and the knife seat (23), and a positioning column (25) is vertically fixed between the lifting drive seat (22) and the knife seat (23). The slide (63) is slidably sleeved on the positioning column (25), and a first limiting spring (64) is also connected between the slide (63) and the positioning column (25); the negative pressure suction head (62) is fixedly connected to the slide (63), and the bottom end of the negative pressure suction head (62) is lower than the position of the knife body (24).

8. The plastic sheet thermoforming and cutting equipment according to claim 1, characterized in that, The plastic product positioning mold (3) includes a positioning mold plate (31), a support guide rail (33) and a linkage push-pull mechanism. The support guide rail (33) is horizontally fixedly connected to the processing table (1), and the positioning mold plate (31) is slidably connected to the support guide rail (33). A limiting block is fixedly provided on the support guide rail (33) so that the positioning mold plate (31) can stop directly below the lifting cutting tool (2). During the lifting process, the lifting cutting tool (2) drives the positioning mold plate (31) to move laterally along the support guide rail (33) by the linkage push-pull mechanism.

9. The plastic sheet thermoforming and cutting equipment according to claim 8, characterized in that, The linkage push-pull mechanism includes a linkage rod (32), a lifting frame (34), and an auxiliary guide rail (35); the auxiliary guide rail (35) is fixedly installed on one side of the lifting cutting tool (2), the lifting frame (34) is slidably connected to the auxiliary guide rail (35), and a second limiting spring is connected between the lifting frame (34) and the auxiliary guide rail (35); one end of the linkage rod (32) is rotatably connected to the lifting frame (34), and the other end is rotatably connected to the positioning mold plate (31).

10. A cutting device for plastic sheet vacuum forming according to claim 1, characterized in that, The waste storage mechanism (4) includes a recycling bin (41), a side pressure plate (42), and an extrusion rod (43). The recycling bin (41) is located below the processing table (1) and aligned with the position of the negative pressure suction head (62). The recycling bin (41) has an opening on one side near the positioning mold plate (31). The side pressure plate (42) is vertically fitted on one side of the opening of the recycling bin (41), and the bottom of the side pressure plate (42) is movably connected to the recycling bin (41) through a spring-loaded hinge. The extrusion rod (43) is parallel to one side of the side pressure plate (42), and the extrusion rod (43) slides synchronously with the plastic product positioning mold (3).

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