Plastic table mat processing device

Abstract

The invention relates to the technical field of plastic product processing equipment, in particular to a plastic table mat processing device which comprises a rack, a film covering roller set, a pressing piece and a cutting mechanism are sequentially arranged on the rack in the table mat conveying direction, and the film covering roller set is used for attaching a film to the surface of a moving plastic table mat; the pressing piece is used for pressing a film-covered area of the plastic table mat when the plastic table mat passes through, the cutting mechanism comprises a first cutting knife capable of transversely reciprocating and two sets of second cutting knives arranged in a bilateral symmetry mode, and the second cutting knives are used for cutting film edges on the two sides of the film-covered table mat; pressure gradient regulation and control of front-section high-pressure attachment and middle-rear-section dynamic pressure relief in the table mat laminating process are achieved, it is guaranteed that the initial positioning of a film material is firm, bubbles are guided to be directionally discharged in the table mat advancing direction, laminating bubble residues are remarkably reduced, the surface flatness is improved, and the table mat laminating device is suitable for high-quality post-treatment of environment-friendly regenerated plastic products.

Description

Technical Field

[0001] This invention relates to the field of plastic product processing equipment technology, specifically a plastic table mat processing device. Background Technology

[0002] With increasingly stringent environmental policies and the popularization of the concept of resource recycling, recycled plastic products made from thermoplastic plastics such as polyvinyl chloride (PVC), polyethylene terephthalate (PET), and polypropylene (PP) are widely used in home furnishing and decoration. Among them, plastic placemats (also known as crystal decorative panels) made from recycled plastic granules through extrusion, calendering, or thermoforming processes have become an important environmentally friendly material to replace natural stone and wood due to their smooth surface, rich colors, and low cost.

[0003] However, the high-gloss surface of crystal boards is easily scratched during cutting, polishing, stacking or transportation. Therefore, the industry generally adopts a double-sided lamination process, which involves pre-applying a transparent protective film to the upper and lower surfaces of the board to isolate it from external damage. After subsequent processing, the protective film is removed to reveal the clean finished product surface.

[0004] However, in the existing technology, if there are air bubbles or uneven bonding during the lamination process for large-area table mats or high-gloss crystal boards, the lamination surface containing air bubbles cannot be flat and bonded. When multiple crystal boards are stacked, they form "bulges" or tilt, which can easily lead to unstable stacking and collapse. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic table mat processing device to solve the problems mentioned in the background art, such as the inability to smoothly adhere the film surface containing air bubbles, the formation of "bulges" or tilting when multiple crystal boards are stacked, which easily leads to unstable stacking and collapse.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A plastic placemat processing device includes a frame. A film-coating roller group and a cutting mechanism are sequentially mounted on the frame along the direction of the placemat's movement. A pressing member is rotatably mounted on the frame between the film-coating roller group and the cutting mechanism. The film-coating roller group is used to adhere a film to the surface of the moving plastic placemat. The pressing member is used to press the film-coated area of ​​the plastic placemat as it passes by. The cutting mechanism includes a first cutting blade that can reciprocate laterally and two sets of second cutting blades arranged symmetrically on the left and right sides. The second cutting blades are used to cut the film edges on both sides of the film-coated placemat.

[0007] Preferably, the coating roller assembly includes an upper coating roller and a lower coating roller symmetrically arranged vertically, with a coating cavity formed between the upper and lower coating rollers for the plastic table mat to pass through. Floating blocks are rotatably installed at both ends of the upper and lower coating rollers, and a corresponding floating groove is provided on the frame. A spring is connected between the floating block and the inner sidewall of the floating groove.

[0008] Preferably, the upper and lower coating rollers are hollow roller bodies, and a high-voltage electrostatic bar is fixedly installed inside them along the axial direction. A corona discharge gap is left between the high-voltage electrostatic bar and the inner wall of the roller body.

[0009] Preferably, the cutting mechanism further includes a horizontal support fixedly mounted on the frame, the horizontal support spanning over the table mat conveying path, a transverse guide rail and a ball screw mounted on the horizontal support along the width direction of the table mat, the first cutting blade being mounted together on the transverse guide rail and the ball screw, the ball screw being driven by a servo motor.

[0010] Preferably, a bidirectional lead screw is rotatably mounted on the side of the horizontal support near the pressing member, and two sets of second cutting blades are respectively threaded to the left-hand threaded section and the right-hand threaded section of the bidirectional lead screw through nut seats. The bidirectional lead screw is driven by a servo motor, and the second cutting blade is also slidably fitted on the pressing member.

[0011] Preferably, the second cutting blade includes a support frame, on which a connecting block is bolted. A first rod and a second rod are slidably mounted within the connecting block, the first rod and the second rod being spatially perpendicular to each other. A shaped rod is also rotatably mounted within the connecting block, with its two ends rotatably connected to the first rod and the second rod, respectively. A third rod is slidably mounted on the support frame, slidably connected to the second rod, and an upper blade is bolted onto the third rod. A cylinder is fixedly mounted on the support frame, and a slider is fixedly mounted on the output end of the cylinder. The slider slides on the support frame, the first rod is fixedly mounted on the slider, and a lower blade is fixedly mounted on the slider. The second rod has a wedge-shaped structure.

[0012] Preferably, the pressing component includes a rotating shaft rotatably mounted on the frame, a torsion spring is provided between the rotating shaft and the inner wall of the frame, and a pressure plate is fixedly mounted on the rotating shaft.

[0013] Preferably, the pressing members are arranged symmetrically on the top and bottom, and gears are installed at both ends of the upper and lower rotating shafts, and the upper and lower gears are meshed together.

[0014] Preferably, the connecting block is slidably fitted onto the rotating shaft, and a fourth rod is slidably installed inside the connecting block. The fourth rod and the second rod are spatially perpendicular to each other. A second spring is fixedly connected between the fourth rod and the inner wall of the connecting block. The fourth rod has a toothed groove, and a toothed roller is coaxially installed on the rotating shaft.

[0015] Preferably, a V-block is rotatably mounted on the inner wall of the frame, the V-block is rotatably connected to a floating block, and a lever is fixedly mounted on the rotating shaft, the lever being in contact with the V-block.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up the coating roller group and pressing parts, the pressure gradient control is achieved during the coating process of the table mat. The high pressure bonding in the front section and the dynamic pressure relief in the middle and rear sections ensure that the initial positioning of the film material is firm and guide the air bubbles to be discharged in the direction of the table mat's movement, significantly reducing the residual air bubbles in the coating and improving the surface smoothness.

[0017] 2. Two sets of second cutting blades are arranged symmetrically on the left and right, with their blades facing the edge of the table mat. They are used to simultaneously cut off the excess film edge that exceeds the preset width after the film is applied. This creates a uniform exposed gap between the edge of the protective film and the edge of the table mat body, which facilitates subsequent manual film tearing. In subsequent packaging or quality inspection processes, the visual recognition system can more accurately locate the actual edge of the table mat. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Schematic diagram of a partial structure; Figure 3 for Figure 2 Enlarged view of the A-structure; Figure 4 This is a schematic diagram of the cutting mechanism and pressing element of the present invention; Figure 5 This is a schematic diagram of the internal structure of the upper coating roller of the present invention; Figure 6 This is a schematic diagram of the pressing component structure of the present invention; Figure 7 This is a schematic diagram of the second cutting blade structure of the present invention; Figure 8 This is a schematic diagram of the fourth rod mounting structure of the present invention; The attached diagram lists the components represented by each number as follows: 10. Frame; 11. Floating trough; 12. V-block; 13. Frame body; 14. Rotary roller; 20. Coating roller assembly; 21. Upper coating roller; 22. Lower coating roller; 23. Floating block; 24. Spring 1; 25. High-voltage electrostatic bar; 30. Cutting mechanism; 31. First cutting blade; 32. Second cutting blade; 321. Support frame; 322. Connecting block; 323. First rod; 324. Second rod; 325. Irregular rod; 326. Third rod; 327. Upper blade; 328. Lower blade; 329. Fourth rod; 33. Horizontal support; 34. Transverse guide rail; 35. Ball screw; 36. Bidirectional screw; 37. Cylinder; 38. Slider; 301. Tooth groove; 302. Spring II; 40. Pressing element; 41. Rotating shaft; 42. Torsion spring; 43. Pressure plate; 44. Gear; 45. Pulley; 46. Toothed roller. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Refer to Figure 1 - Figure 8 The figure shows a plastic table mat processing device, which includes a frame 10, a film coating roller group 20, a cutting mechanism 30 and a pressing component 40. The whole structure is integrated in the same production line and is suitable for the surface treatment process of plastic table mats after molding.

[0021] Specifically, a film-coating roller group 20 and a cutting mechanism 30 are sequentially installed on the frame 10 along the forward direction of the table mat. A pressing member 40 is rotatably installed on the frame 10 between the film-coating roller group 20 and the cutting mechanism 30. The film-coating roller group 20 is used to adhere the film to the surface of the plastic table mat as it moves forward. The pressing member 40 is used to press the film-coated area of ​​the plastic table mat as it passes by. The cutting mechanism 30 includes a first cutting blade 31 that can move laterally back and forth and two sets of second cutting blades 32 that are symmetrically arranged on the left and right. The second cutting blades 32 are used to cut the film edges on both sides of the table mat after film coating.

[0022] In an exemplary embodiment, the frame 10 serves as the support base for the entire machine and mainly includes a frame body 13 and rotating rollers 14. The frame body 13 extends along the conveying direction of the plastic table mat, and the rotating rollers 14 are multiple cylindrical conveying rollers arranged side by side at equal intervals along the conveying path of the frame body 13. The axes of each rotating roller 14 are parallel to each other and perpendicular to the forward direction of the table mat. Each rotating roller 14 is rotatably mounted between the two sides of the frame body 13 through a bearing seat to form a continuous and smooth conveying plane. In this embodiment, the rotating roller 14 located in the middle is the active roller and is connected to the servo motor through chain drive. The remaining rotating rollers 14 are driven rollers and are connected to the active roller through belt drive.

[0023] After being output from the upstream forming equipment, the plastic table mat enters the conveying start end of this device. First, it passes through the film coating roller group 20. The protective film roll is drawn out from the film unwinding shaft, passes through the tension adjusting roller and the guide roller, and covers the upper surface of the table mat. It is then adhered to the plastic table mat at the film coating roller group 20. Subsequently, the coated table mat continues to be conveyed forward and enters the pressing member 40 area. The pressing member 40 is a rotatable component that acts on the surface of the plastic table mat. When the table mat passes by, the pressing member 40 flattens the coated area, eliminates tiny air gaps, enhances the adhesion between the film and the substrate, and makes the film surface smoother and more even, effectively preventing edge curling or film detachment during subsequent use. Finally, the table mat enters the cutting mechanism 30. The mechanism includes a first cutting blade 31 that moves laterally and two sets of second cutting blades 32 arranged symmetrically on the left and right. The first cutting blade 31 is mounted on a crossbeam slide and driven by a servo motor to reciprocate along a direction perpendicular to the conveying direction. It is used to cut the front and rear ends of the table mat. The two sets of second cutting blades 32 are respectively set on the left and right sides of the conveying path, with their blades facing the edge of the table mat. They are used to simultaneously cut off the excess film edge that exceeds the preset width after film coating. The resulting protective film edge forms a uniform exposed gap with the edge of the table mat body, which facilitates subsequent manual film tearing. In subsequent packaging or quality inspection processes, the visual recognition system can more accurately locate the true boundary of the table mat and avoid misjudging the film edge as the product outline.

[0024] Reference Figure 2 and Figure 3 The laminating roller assembly 20 includes an upper laminating roller 21 and a lower laminating roller 22 symmetrically arranged vertically, with their axes perpendicular to the table mat conveying direction. A laminating cavity is formed between the upper laminating roller 21 and the lower laminating roller 22 for the plastic table mat to pass through. The plastic table mat and the protective film to be laminated pass through the laminating cavity together and are laminated under pressure. To adapt to the flexible pressing requirements of table mats and film materials of different thicknesses, floating blocks 23 are rotatably installed at both ends of the upper laminating roller 21 and the lower laminating roller 22. A corresponding floating groove 11 is provided on the frame 10. A spring 24 is connected between the floating block 23 and the inner side wall of the floating groove 11. The spring 24 provides a constant elastic preload, so that the upper laminating roller 21 and the lower laminating roller 22 always apply a moderate and adaptive pressing force to the table mat and film composite that passes through.

[0025] Furthermore, the upper coating roller 21 and the lower coating roller 22 are hollow roller bodies, and a high-voltage electrostatic rod 25 is fixedly installed inside them along the axial direction. The high-voltage electrostatic rod 25 is fixed to the center of the roller body by an insulating bracket. A corona discharge gap is left between the high-voltage electrostatic rod 25 and the inner wall of the roller body. This gap constitutes a corona discharge area. The high-voltage electrostatic rod 25 is connected to an external high-frequency high-voltage power supply through a wire. After being energized, a stable corona discharge field is generated near the inner wall of the roller body.

[0026] It is worth noting that although the high-voltage electrostatic bar 25 is located inside the roller, the electric field it generates can be coupled outward through the metal roller to form a weak electrostatic adsorption effect on the surface of the coating roller. At the same time, more importantly, the active particles generated during the corona discharge process can diffuse through the micropores on the roller surface to the coating contact area to perform in-situ corona treatment on the surface of the plastic table mat and the inner side of the protective film.

[0027] During operation, the plastic table mat is conveyed from upstream to the inlet of the coating roller group 20, while the protective film is drawn out from the unwinding mechanism and covers the upper surface of the table mat. Both enter the coating cavity between the upper coating roller 21 and the lower coating roller 22 simultaneously. During this process, the spring 24 pushes the floating block 23, so that the upper coating roller 21 and the lower coating roller 22 apply uniform pressure to the table mat and the film stack. After the high-voltage electrostatic bar 25 is energized, corona discharge is generated in the roller body, generating high-energy electrons and active oxygen species. These active substances diffuse to the coating interface, instantaneously oxidizing the surface of the non-polar plastic table mat. At the same time, the inner side of the protective film is also slightly activated. The adhesion between the two is greatly improved at the moment of pressing, preventing the film from falling off during subsequent transportation or use.

[0028] Reference Figure 4 In addition to the second cutting blade 32 for cutting the film edge, the cutting mechanism 30 also includes a first cutting blade 31 for cutting the plastic table mat to a fixed length. To achieve high-precision, programmable transverse cutting action, the first cutting blade 31 is integrated into a servo-driven linear motion module. Specifically, the cutting mechanism 30 also includes a horizontal support 33 fixedly mounted on the frame 10. The horizontal support 33 spans across the table mat conveying path. A transverse guide rail 34 and a ball screw 35 are mounted on the horizontal support 33 along the width direction of the table mat. The first cutting blade 31 is mounted on both the transverse guide rail 34 and the ball screw 35. The ball screw 35 is driven by a servo motor.

[0029] During operation, after the film is attached to the front end of the table mat, the servo motor drives the ball screw 35 to rotate in the forward direction, which drives the first cutting blade 31 to move quickly and accurately in the transverse guide rail 34 to complete one cutting action. After the film is applied, the servo motor drives the ball screw 35 to rotate in the reverse direction, which drives the first cutting blade 31 to move quickly and accurately in the transverse guide rail 34 to complete another cutting action.

[0030] Reference Figure 7 and Figure 8 The two sets of second cutting blades 32 in the cutting mechanism 30 are used to simultaneously cut the film edges on both sides of the plastic table mat that exceed the preset width after film coating. In order to achieve the goal of adjustable blade distance, accurate cutting and compact structure, specifically, a bidirectional lead screw 36 is rotatably installed on the side of the horizontal support 33 near the pressing member 40. The two sets of second cutting blades 32 are respectively connected to the left-hand threaded section and the right-hand threaded section of the bidirectional lead screw 36 through the nut seat thread. The bidirectional lead screw 36 is driven by a servo motor. The second cutting blades 32 are also slidably fitted on the pressing member 40.

[0031] Specifically, the second cutting blade 32 includes a support frame 321, on which a connecting block 322 is bolted. A first rod 323 and a second rod 324 are slidably mounted within the connecting block 322, and the first rod 323 and the second rod 324 are spatially perpendicular to each other. A non-circular rod 325 is also rotatably mounted within the connecting block 322, with both ends of the non-circular rod 325 rotatably connected to the first rod 323 and the second rod 324, respectively. A third rod 326 is slidably mounted on the support frame 321, and the third rod 326 is slidably connected to the second rod 324. An upper blade 327 is bolted onto the third rod 326. A cylinder 37 is fixedly mounted on the support frame 321, and a slider 38 is fixedly mounted on the output end of the cylinder 37. The slider 38 slides on the support frame 321. The first rod 323 is fixedly mounted on the slider 38, and a lower blade 328 is also fixedly mounted on the slider 38. The second rod 324 has a wedge-shaped structure.

[0032] When changing to plastic table mats of different widths, the control system starts the servo motor, which drives the bidirectional lead screw 36 to rotate. Since the left and right nut seats are respectively screwed into the opposite thread section, the two sets of second cutting blades 32 will synchronously move towards the center or expand outward until the width requirement is met.

[0033] When the laminated table mat is conveyed to the cutting station, cylinder 37 is activated, pushing slider 38 upward. Slider 38 drives first rod 323 to move upward synchronously. First rod 323 pulls second rod 324 horizontally outward via irregular rod 325. Since second rod 324 has a wedge-shaped structure, its inclined surface pushes third rod 326 downward. Third rod 326 drives upper blade 327 downward, forming a shearing engagement with lower blade 328 fixed on slider 38, completing the cutting of the film edge.

[0034] Reference Figure 4 and Figure 6 - Figure 8The pressing component 40 in this invention is not only used to flatten and press the film-coated plastic table mat, but also serves to provide guidance support and linkage feedback for the second cutting blade 32, realizing structural integration and action coordination. Specifically, the pressing component 40 includes two sets arranged symmetrically on the upper and lower sides, including a rotating shaft 41 rotatably mounted on the frame 10. A torsion spring 42 is provided between the rotating shaft 41 and the inner wall of the frame 10 to apply an initial torque to the rotating shaft 41. A pressure plate 43 is fixedly mounted on the rotating shaft 41.

[0035] Furthermore, the pressing components 40 are arranged symmetrically on the top and bottom. To ensure that the upper and lower pressure plates 43 rotate synchronously in opposite directions, gears 44 are installed at both ends of the upper and lower rotating shafts 41, and the upper and lower gears 44 are meshed and connected.

[0036] More importantly, the connecting block 322 is slidably fitted onto the rotating shaft 41 and can slide along the axial direction of the rotating shaft 41, thereby adjusting the cutting position with the bidirectional lead screw 36. At the same time, the rotating shaft 41 provides vertical guiding constraints. In addition, a fourth rod 329 is slidably installed inside the connecting block 322. The fourth rod 329 and the second rod 324 are perpendicular to each other in spatial arrangement. A spring 302 is fixedly connected between the fourth rod 329 and the inner wall of the connecting block 322. The fourth rod 329 has a toothed groove 301. A toothed roller 46 is coaxially installed on the rotating shaft 41.

[0037] When the table mat enters the pressing part 40 area, the pressure plate 43 is held in the initial position by the initial torque of the torsion spring 42 and does not contact the surface of the table mat. When the table mat enters the working area of ​​the second cutting blade 32, the second cutting blade 32 cuts the film edge. At this time, the second rod 324 moves horizontally outward, pushing the fourth rod 329 to move in the connecting block 322. The toothed groove 301 on the fourth rod 329 drives the meshing toothed roller 46 to rotate, so that the pressure plate 43 lightly presses the film surface. Since the upper and lower gears 44 mesh, the upper and lower pressure plates 43 move symmetrically.

[0038] Reference Figure 3 A V-block 12 is rotatably mounted on the inner wall of the frame 10. The V-block 12 has a "V"-shaped lever structure, with its fulcrum located at the central pivot pin. The V-block 12 is rotatably connected to the floating block 23. A lever 45 is fixedly mounted on the rotating shaft 41. The lever 45 is a rigid protruding component that rotates synchronously with the rotating shaft 41. The end of the V-block 12 away from the floating block 23 is exposed in the movement trajectory of the lever 45, and the lever 45 contacts the V-block 12.

[0039] When the front end of the plastic table mat just enters the laminating roller group 20, the pressing element 40 has not yet been triggered. At this time, the toggle block 45 is in a high position and no downward pressure is applied to the V-block 12. Under the action of the spring 24, the floating block 23 presses the upper laminating roller 21 against the table mat, forming a high initial pressing force. Under high pressure, the protective film quickly achieves local tight adhesion with the front edge of the table mat, preventing the film from drifting or wrinkling at the entrance. As the table mat continues to be conveyed forward, its main body enters below the pressing element 40 and enters the working area of ​​the second cutting blade 32. The second cutting blade 32 cuts the film edge. At this time, the second rod 324 moves horizontally outward, pushing the fourth rod. 329 moves within the connecting block 322. The toothed groove 301 on the fourth rod 329 drives the meshing toothed roller 46 to rotate, thereby causing the pressure plate 43 to lightly press the film-coated surface. At the same time, the rotating shaft 41 drives the toggle block 45 to swing down synchronously, pressing down the trigger end of the V-block 12. The V-block 12 rotates around its central pivot point, and its driving end pulls the floating block 23 upward. The floating block 23 drives the upper film-coating roller 21 to rise slightly momentarily, so that the pressure in the film-coating cavity in the middle and rear section of the table mat is slightly reduced and the gap is slightly increased. The air bubbles are "pushed" to the tail along the forward direction of the table mat, realizing a continuous dynamic process of "pressing and venting at the same time", which significantly reduces the residual air bubbles.

[0040] Working Principle: During operation, the pre-formed table mat, made from recycled plastic waste, enters this device from the upstream equipment. Simultaneously, a protective film is drawn out to cover its upper surface. Both enter the coating roller group 20, which consists of an upper coating roller 21 and a lower coating roller 22. Inside the roller group is a high-voltage electrostatic bar 25, which generates corona discharge upon energization, performing in-situ surface activation on the table mat and the inner side of the protective film, significantly improving interfacial adhesion. As the table mat continues to move forward, its main body enters the pressing component 40 station. The pressing component 40 consists of symmetrical upper and lower pressing plates 43. The gear 44 meshes to achieve synchronous reverse rotation and maintains pretension under the action of torsion spring 42. The key is that the pressing action does not occur independently, but is triggered by the cutting action of the second cutting blade 32. When the cylinder 37 drives the second cutting blade 32 to perform film edge cutting, its internal wedge linkage mechanism pushes the fourth rod 329 to move. It meshes with the toothed roller 46 through the toothed groove 301, driving the rotating shaft 41 to rotate, so that the pressure plate 43 gently presses the bonded area, further eliminating small air gaps, enhancing the bonding force between the film and the substrate, and preventing subsequent edge curling.

[0041] During cutting, the second cutting blade 32 is servo-driven by a bidirectional lead screw 36, which can steplessly adjust the cutting width so that the final width of the protective film is narrower than the table mat, forming an exposed edge, which is convenient for users to tear the film and for machine vision to identify.

[0042] Furthermore, the rotation of the pressing element 40 is also controlled by the mechanical linkage between the lever 45 and the V-block 12, which reverses the position of the coating roller group 20: when the pressure plate 43 presses down, the lever 45 swings down to press one end of the V-block 12, causing it to rotate around the fulcrum, while the other end pulls the floating block 23 upward, causing the upper coating roller 21 to rise slightly momentarily. This action creates a brief pressure release and gap expansion in the rear section of the coating cavity, forming a longitudinal pressure gradient with the front high-pressure bonding area, guiding the trapped air to migrate and escape from the rear along the direction of the table mat's movement, achieving a dynamic coating effect of "pressing while venting," fundamentally reducing air bubble residue, and is particularly suitable for efficient post-processing of recycled plastic products with high surface quality requirements.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic table mat processing device, comprising a frame (10), characterized in that, A film-coating roller group (20) and a cutting mechanism (30) are sequentially installed on the frame (10) along the forward direction of the table mat. A pressing member (40) is rotatably installed on the frame (10) between the film-coating roller group (20) and the cutting mechanism (30). The film-coating roller group (20) is used to adhere the film to the surface of the plastic table mat as it moves forward. The pressing member (40) is used to press the film-coated area of ​​the plastic table mat as it passes by. The cutting mechanism (30) includes a first cutting blade (31) that can move laterally back and forth and two sets of second cutting blades (32) arranged symmetrically on the left and right. The second cutting blades (32) are used to cut the film edges on both sides of the table mat after film coating.

2. The plastic table mat processing device according to claim 1, characterized in that: The coating roller assembly (20) includes an upper coating roller (21) and a lower coating roller (22) symmetrically arranged at the top and bottom. A coating cavity for plastic table mats to pass through is formed between the upper coating roller (21) and the lower coating roller (22). Floating blocks (23) are rotatably installed at both ends of the upper coating roller (21) and the lower coating roller (22). A floating groove (11) is correspondingly opened on the frame (10). A spring (24) is connected between the floating block (23) and the inner side wall of the floating groove (11).

3. The plastic table mat processing device according to claim 2, characterized in that: The upper coating roller (21) and the lower coating roller (22) are hollow roller bodies, and a high-voltage electrostatic bar (25) is fixedly installed inside them along the axial direction. A corona discharge gap is left between the high-voltage electrostatic bar (25) and the inner wall of the roller body.

4. The plastic table mat processing device according to claim 1, characterized in that: The cutting mechanism (30) also includes a horizontal support (33) fixedly installed on the frame (10). The horizontal support (33) spans across the table mat conveying path. A transverse guide rail (34) and a ball screw (35) are installed on the horizontal support (33) along the width direction of the table mat. The first cutting blade (31) is installed on the transverse guide rail (34) and the ball screw (35). The ball screw (35) is driven by a servo motor.

5. A plastic table mat processing device according to claim 4, characterized in that: The horizontal support (33) is rotatably mounted with a bidirectional lead screw (36) on the side near the pressing member (40). Two sets of second cutting blades (32) are respectively threaded to the left-hand threaded section and the right-hand threaded section of the bidirectional lead screw (36) through nut seats. The bidirectional lead screw (36) is driven by a servo motor. The second cutting blades (32) are also slidably fitted on the pressing member (40).

6. The plastic table mat processing device according to claim 1, characterized in that: The second cutting blade (32) includes a support frame (321), on which a connecting block (322) is bolted. A first rod (323) and a second rod (324) are slidably installed in the connecting block (322). The first rod (323) and the second rod (324) are perpendicular to each other in spatial arrangement. A special-shaped rod (325) is also rotatably installed in the connecting block (322). The two ends of the special-shaped rod (325) are rotatably connected to the first rod (323) and the second rod (324) respectively. A third rod (326) is slidably installed on the support frame (321). The third rod (326) is slidably connected to the second rod (324). An upper blade (327) is bolted onto the third rod (326). A cylinder (37) is fixedly installed on the support frame (321), and a slider (38) is fixedly installed on the output end of the cylinder (37). The slider (38) slides on the support frame (321). The first rod (323) is fixedly installed on the slider (38), and a lower blade (328) is also fixedly installed on the slider (38). The second rod (324) is a wedge-shaped structure.

7. A plastic table mat processing device according to claim 5, characterized in that: The pressing component (40) includes a rotating shaft (41) rotatably mounted on the frame (10), a torsion spring (42) is provided between the rotating shaft (41) and the inner wall of the frame (10), and a pressure plate (43) is fixedly mounted on the rotating shaft (41).

8. A plastic table mat processing device according to claim 7, characterized in that: The pressing element (40) is arranged symmetrically on the top and bottom. Both ends of the upper and lower rotating shafts (41) are equipped with gears (44), and the upper and lower gears (44) are meshed and connected.

9. A plastic table mat processing device according to claim 6, characterized in that: The connecting block (322) is slidably fitted on the rotating shaft (41). A fourth rod (329) is also slidably installed inside the connecting block (322). The fourth rod (329) and the second rod (324) are perpendicular to each other in spatial arrangement. A spring (302) is fixedly connected between the fourth rod (329) and the inner wall of the connecting block (322). A toothed groove (301) is opened on the fourth rod (329). A toothed roller (46) is coaxially installed on the rotating shaft (41).

10. A plastic table mat processing device according to claim 7, characterized in that: A V-block (12) is rotatably mounted on the inner wall of the frame (10). The V-block (12) is rotatably connected to the floating block (23). A lever (45) is fixedly mounted on the rotating shaft (41). The lever (45) is in contact with the V-block (12).

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