High and low temperature TPU in-mold composite casting machine

Abstract

The application relates to the technical field of casting machine structures, in particular to a high-low-temperature TPU in-mold composite casting machine, which has the structure comprising a casting mechanism, a cooling and forming mechanism and a winding mechanism, wherein the casting mechanism comprises a casting film head fixed below a rack, and further comprises a cleaning mechanism rotatably connected to the rack and used for removing accumulated materials from the mold lip of the casting film head; the cleaning mechanism comprises a fixed base and a sliding assembly, the fixed base is internally provided with a driving device for driving the sliding assembly to slide along the length direction of the casting film head, the top end of the sliding assembly is provided with a scraper capable of being inserted into the gap between the mold lip and the casting film head, and the sliding assembly is further provided with a material discharging mechanism for discharging the accumulated materials in front of the reciprocating scraper; the glue removing hook of the application sequentially experiences the actions of lifting, peeling and separating under the driving of the transmission assembly, so that the accumulated materials in front of the scraper can be effectively removed, the problems of increased scraping resistance and incomplete scraping caused by the accumulated materials are avoided, and the efficiency and cleanliness of the mold lip cleaning are improved.

Description

Technical Field

[0001] This invention relates to the field of casting machine structure technology, and in particular, to a high and low temperature TPU in-mold composite casting machine. Background Technology

[0002] Thermoplastic polyurethane (TPU) film is widely used in footwear, packaging, electronic protection and other fields due to its excellent properties such as flexibility and abrasion resistance. In-mold composite casting machine is the core equipment for its industrial production. Its production process is as follows: TPU particles enter the screw through the hopper of the main machine, and plasticize and melt through segmented temperature control to form a high-viscosity melt. After being transported through the flow channel, it is extruded and cast by precision die lip.

[0003] To ensure the quality of TPU film products, a critical "residual material removal" process is required before each production run. After the previous batch of production, some cooled and solidified old TPU material remains in the screw, runner, and inside the mold. If it is not thoroughly removed, the mixing of new and old material will cause defects such as color difference and impurities in the film. Molten TPU has high viscosity and is prone to rolling and adhering to the mold lip surface and edges during material removal. If it is not cleaned, subsequent production will cause defects such as longitudinal lines and unevenness in the film, affecting product quality.

[0004] The patent document with publication number CN212860561U discloses a cast film production system, which includes an extruder, a cooling and forming machine, a setting machine, a traction folding machine, a film guide frame, and a winding machine arranged in sequence. The raw material enters the extruder, melts into a gel, and then forms a sheet film for extrusion. The sheet film is cooled and shaped by the cooling and forming machine and the setting machine. After being folded by the traction folding machine, it is guided into the winding machine by the film guide frame for winding.

[0005] In practical applications, it still has the following shortcomings: Currently, the cleaning of residual material on the mold lip is generally done manually using a handheld metal scraper. During the scraping process, the high-viscosity TPU residue tends to adhere to and accumulate on the front end and sides of the scraper. As the cleaning operation progresses, the amount of accumulated residue gradually increases, which not only significantly increases the scraping resistance between the scraper and the mold lip, leading to increased labor intensity for operators and low cleaning efficiency; but also, the accumulated residue will damage the adhesion precision between the scraper and the mold lip surface, making it impossible to completely remove the residue from critical areas such as the edges and tiny gaps of the mold lip. The residual material will continue to contaminate the film in subsequent production, resulting in a high product defect rate; at the same time, it is difficult to accurately control the force and path of manual cleaning. Long-term operation is prone to wear on the mold lip surface due to accidental scraping, affecting the service life of the mold and further increasing production and maintenance costs. Summary of the Invention

[0006] This invention provides a high and low temperature TPU in-mold composite casting machine, which can effectively solve the above problems.

[0007] This invention is implemented as follows:

[0008] A high- and low-temperature TPU in-mold composite casting machine includes a casting mechanism, a cooling and molding mechanism, and a winding mechanism. The casting mechanism includes a casting head fixed below the frame and a cleaning mechanism rotatably connected to the frame for removing material accumulated on the die lip of the casting head. The cleaning mechanism includes a fixed base and a sliding assembly. The fixed base contains a drive device that drives the sliding assembly to slide along the length of the casting head. The top of the sliding assembly has a scraper that can be inserted into the gap between the die lip and the casting head. The sliding assembly also contains a discharge mechanism for reciprocatingly cleaning material accumulated at the front end of the scraper. The discharge mechanism includes a de-adhesive hook located within the sliding assembly and a transmission assembly that drives the de-adhesive hook to move along the side wall of the scraper in a triangular trajectory to remove material accumulated at the front end of the scraper.

[0009] As a further improvement, two adhesive removal hooks are provided, arranged side by side on the front and rear sides of the scraper; the top and front end of the sliding assembly are provided with movable channels for the reciprocating movement of the adhesive removal hooks; the transmission assembly includes a triangular guide groove on one side of the movable channel; the triangular guide groove includes a vertical section located near the rear end of the sliding assembly, a first inclined section connected to the top of the vertical section and extending towards the front end of the sliding assembly, and a second inclined section connected between the end of the first inclined section and the bottom of the vertical section; the bottoms of the two adhesive removal hooks are connected by a connecting rod; the bottom of one of the adhesive removal hooks is provided with a guide post that slides in cooperation with the triangular guide groove; the assembly also includes a limiting device for fixing the adhesive removal hook in a vertical state within the movable channel; and a linkage transmission mechanism for driving the guide post to reciprocate along the triangular guide groove.

[0010] As a further improvement, the limiting device includes a square boss located at the bottom of another adhesive removal hook, and a fixed frame located on the other side of the movable channel. The fixed frame is rectangular and has a limiting groove inside for the square boss to slide along the forward direction of the scraper. The movable channel also has a lifting groove for the fixed frame to slide along the vertical section.

[0011] As a further improvement, the sliding assembly has an outwardly protruding convex ring mechanism on its sidewall, the fixed base has a first sliding groove for the convex ring mechanism to slide, the surface of the convex ring mechanism has a vertically arranged linear guide rail, the linkage transmission mechanism includes a transmission rod that slides within the linear guide rail, one end of the transmission rod facing the inside of the convex ring mechanism is rotatably connected to a swing rod, the other end of the swing rod is hinged to the connecting rod, the sliding assembly has a swing gap for the swing rod to move, and the inner wall of the first sliding groove has a sinusoidal curve guide rail that slides with the transmission rod.

[0012] As a further improvement, the triangular guide groove is also provided with a backstop mechanism to prevent the guide post from sliding backward. The backstop mechanism includes a first backstop block slidably connected to the bottom left end of the first inclined section. The left end of the first backstop block is provided with a first spring. The top of the first backstop block has a first extension surface that continuously engages with the bottom surface of the first inclined section. The bottom of the first backstop block has a first guide surface, which is used to push the first backstop block to slide to the left along the first guide surface when the guide post enters the first inclined section from the vertical section. It also includes a second backstop block slidably connected to the right side of the bottom of the vertical section. The bottom of the second backstop block is provided with a second spring. The left side of the second backstop block has a second extension surface that continuously engages with the vertical section. The top of the second backstop block has a second guide surface, which is used to push the second backstop block to slide downward along the second guide surface when the guide post enters the vertical section from the second inclined section.

[0013] As a further improvement, the driving device includes a driving screw located at the bottom of the fixed base, and a first motor located at one end of the fixed base to drive the driving screw to rotate. The bottom of the sliding assembly has a slider threadedly connected to the driving screw, and the fixed base is provided with a second groove for the slider to slide along the length direction of the casting film head.

[0014] As a further improvement, the bottom of the convex ring mechanism is provided with a connecting shaft, which is coaxial with and rotatably connected to the slider. A one-way bearing is sleeved on the connecting shaft, and a transmission gear is sleeved on the outside of the one-way bearing. The fixed base is provided with a third slide groove for the transmission gear to slide synchronously with the convex ring mechanism. Each end of the third slide groove is provided with a set of racks that mesh with the transmission gear. The two sets of racks are respectively located on both sides of the third slide groove, and their tooth surfaces are arranged opposite each other. The side wall of the sliding component is formed with two sets of oppositely arranged locking grooves. The top of the fixed base has a fourth slide groove that slides with the sliding component. The fourth slide groove includes a locking groove in the middle that matches the locking groove, and arc-shaped slides at both ends for the sliding component to rotate. The sinusoidal curve guide rail is provided with two sets, which are respectively located on both sides of the first slide groove. The two ends of the two sinusoidal curve guide rails are connected by continuous arc-shaped guide rails.

[0015] As a further improvement, the side wall of the sliding assembly is also fixed with a collection box for collecting scraper waste. The collection box is provided with an avoidance opening on the side near the sliding assembly for the glue removal hook to pass through. The material guide slope inside the collection box is inclined from top to bottom on the side near the sliding assembly.

[0016] As a further improvement, the blade of the scraper has an inwardly inclined wedge-shaped structure from top to bottom.

[0017] As a further improvement, the frame is also provided with a rotating arm that drives the cleaning mechanism to rotate. The bottom of the rotating arm is fixedly connected to one end of the cleaning mechanism. A drive component for driving the rotating arm to rotate is fixed on the frame, and the output end of the drive component is connected to the rotating arm.

[0018] The beneficial effects of this invention are:

[0019] 1. The adhesive removal hook of the present invention undergoes three stages of action in sequence under the drive of the transmission component: lifting, peeling and detachment. This ensures that the accumulated material at the front end of the scraper is effectively removed, avoiding problems such as increased scraping resistance and incomplete scraping caused by material accumulation, and improving the efficiency and cleanliness of mold lip cleaning. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a high and low temperature TPU in-mold composite casting machine provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the casting mechanism provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the cleaning mechanism provided by the present invention;

[0024] Figure 4 This is a partial cross-sectional structural schematic diagram of the fixed base provided by the present invention;

[0025] Figure 5 This is a partial cross-sectional structural schematic diagram of the fixed base provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the sliding component provided by the present invention;

[0027] Figure 7 This invention provides Figure 6 Enlarged structural diagram of A in the middle;

[0028] Figure 8 This is a partial cross-sectional structural schematic diagram of the fixed base provided by the present invention;

[0029] Figure 9 This is a structural schematic diagram of the fixed base and sliding assembly provided by the present invention;

[0030] Figure 10 This invention provides Figure 9 Enlarged structural diagram of B;

[0031] Figure 11 This is a schematic diagram of the structure of the sliding component provided by the present invention;

[0032] Figure 12 This is a top view of the fixed base provided by the present invention.

[0033] Figure 13 This is a cross-sectional view of the right half of the sliding component provided by the present invention;

[0034] Figure 14 This is a cross-sectional view of the right half of the sliding component provided by the present invention;

[0035] Figure 15 This invention provides Figure 14 A magnified structural diagram of the C-type structure;

[0036] Figure 16 This is a cross-sectional view of the left half of the sliding component provided by the present invention;

[0037] Figure 17 This is a schematic diagram of the cleaning mechanism and material collection box provided by the present invention.

[0038] In the diagram: 1. Casting mechanism; 2. Forming mechanism; 3. Winding mechanism; 4. Frame; 5. Casting film head; 6. Cleaning mechanism; 61. Fixed base; 611. First slide groove; 612. Sine curve guide rail; 613. Second slide groove; 614. Third slide groove; 615. Rack; 616. Fourth slide groove; 617. Snap-fit ​​slide groove; 618. Arc-shaped slide rail; 62. Sliding assembly; 621. Movable channel; 622. Lifting slide groove; 623. Convex ring mechanism; 624. Linear guide rail; 625. Transmission rod; 626. Swing rod; 627. Swing clearance; 628. Connecting shaft; 629. One-way bearing; 6210. Transmission gear; 6211. Locking groove; 63. Scraper; 7. Discharge mechanism; 71. De-adhesive hook; 72. Vertical section; 73. First inclined section; 74. Second inclined section; 75. Connecting rod; 76. Guide column; 77. Square boss; 78. Fixing frame; 81. First backstop block; 82. First spring; 83. Second backstop block; 84. Second spring; 91. Drive screw; 92. First motor; 93. Slider; 10. Collection box; 101. Clearance opening; 11. Rotating arm; 12. Drive component. Detailed Implementation

[0039] All embodiments of the present invention are intended to fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating that the purpose, technical solution, and advantages of the method are clearer. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort indicate or imply the relative importance of the indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Currently, the cleaning of residual material on mold lips is generally done manually using a handheld metal scraper. During the scraping process, the high-viscosity TPU residue tends to adhere to and accumulate on the front and sides of the scraper. As the cleaning operation progresses, the amount of accumulated residue gradually increases, which not only significantly increases the scraping resistance between the scraper and the mold lip, leading to increased labor intensity for operators and low cleaning efficiency, but also damages the adhesion precision between the scraper and the mold lip surface. This prevents the residue from being completely removed from critical areas such as the edges and tiny gaps of the mold lip. The residual material continues to contaminate the film in subsequent production, resulting in a high product defect rate. Furthermore, the force and path of manual cleaning are difficult to control precisely. Long-term operation can easily cause wear on the mold lip surface due to accidental scraping, affecting the service life of the mold and further increasing production and maintenance costs. To solve the above technical problems, this paper proposes the following technical solution:

[0042] Reference Figures 1-17As shown, a high and low temperature TPU in-mold composite casting machine includes a casting mechanism 1, a cooling and molding mechanism 2, and a winding mechanism 3. The casting mechanism 1 includes a casting head 5 fixed below a frame 4, and a cleaning mechanism 6 rotatably connected to the frame 4 for removing material accumulated at the mold lip of the casting head 5. The cleaning mechanism 6 includes a fixed base 61 and a sliding assembly 62. The fixed base 61 is provided with a driving device that drives the sliding assembly 62 to slide along the length of the casting head 5. The top of the sliding assembly 62 is provided with a scraper 63 that can be inserted into the gap of the mold lip of the casting head 5. The sliding assembly 62 is also provided with a discharge mechanism 7 that reciprocates to clean the material accumulated at the front end of the scraper 63. The discharge mechanism 7 includes a de-adhesive hook 71 provided in the sliding assembly 62, and a transmission assembly that drives the de-adhesive hook 71 to move along the side wall of the scraper 63 in a triangular trajectory to remove the material accumulated at the front end of the scraper 63.

[0043] Therefore, the scraper 63 is aligned with the bottom die lip of the casting film head 5, ensuring that the cutting edge of the scraper 63 is parallel to the die lip surface and the gap is uniform. The sliding component 62 is driven by the drive device to move along the length of the die lip on the fixed base 61, so that the scraper 63 scrapes off the residual material on the die lip. During the movement, the front end of the scraper 63 continuously accumulates the scraped TPU residue. The adhesive removal hook 71 is initially located inside the sliding component 62, that is, below the scraper 63. As the scraper 63 moves, the transmission component drives the adhesive removal hook 71 to reciprocate along a triangular trajectory on the side of the scraper 63, so that the adhesive removal hook 71 moves sequentially along the vertical, horizontal, and diagonal directions of the triangle. Specifically, the adhesive removal hook 71 is raised from the bottom of the scraper 63 to the top of the scraper 63. The material then moves laterally towards the blade of the scraper 63 along a transverse trajectory. At this point, the front end of the de-adhesive hook 71 contacts the accumulated material at the front end of the scraper 63. As the de-adhesive hook 71 moves laterally, it peels off the accumulated material at the front end of the scraper 63 laterally. Finally, the de-adhesive hook 71 moves downward along an oblique trajectory, causing the hook at the front end of the de-adhesive hook 71 to catch the accumulated material and move downward obliquely to detach from the front end of the scraper, thus achieving automatic material discharge. At the same time, the de-adhesive hook 71 returns to its initial position, completing one cleaning cycle. Driven by the transmission component, the de-adhesive hook 71 sequentially undergoes three stages of action: lifting, peeling, and detachment, ensuring that the accumulated material at the front end of the scraper is effectively removed. This avoids problems such as increased scraping resistance and incomplete scraping caused by material accumulation, thus improving the efficiency and cleanliness of mold lip cleaning.

[0044] Furthermore, two adhesive removal hooks 71 are provided and are arranged side by side on the front and rear sides of the scraper 63; therefore, by the synchronous operation of the two sets of adhesive removal hooks 71, the accumulated material on both sides of the front end of the scraper 63 is cleaned simultaneously, improving the material discharge efficiency and the symmetry of the operation, and reducing the scraper deviation or wear caused by unilateral force.

[0045] The top and front end of the sliding component 62 are provided with a movable channel 621 for the reciprocating movement of the adhesive removal hook 71. The transmission component includes a triangular guide groove on one side of the movable channel 621. The triangular guide groove includes a vertical section 72 located near the rear end of the sliding component 62, a first inclined section 73 connected to the top end of the vertical section 72 and extending towards the front end of the sliding component 62, and a second inclined section 74 connected between the end of the first inclined section 73 and the bottom end of the vertical section 72. The bottoms of the two adhesive removal hooks 71 are connected by a connecting rod 75. The bottom of one of the adhesive removal hooks 71 is provided with a guide post 76 that slides with the triangular guide groove. The component also includes a limiting device for fixing the adhesive removal hook 71 in a vertical state within the movable channel 621, and a linkage transmission mechanism for driving the guide post 76 to reciprocate along the triangular guide groove.

[0046] In the initial state, the guide post 76 is at the bottom of the vertical section 72 of the triangular guide groove. As the linkage transmission mechanism drives the guide post 76 to reciprocate along the triangular guide groove, the two sets of adhesive removal hooks 71 move synchronously in the active channel 621 of the sliding component 62. The limiting device ensures that the adhesive removal hooks 71 maintain a vertical posture during the movement, preventing them from tilting or getting stuck during the movement.

[0047] Specifically, the linkage transmission mechanism drives the guide column 76 to slide upwards along the vertical section 72 to the top. At this time, the two sets of adhesive removal hooks 71 move upwards synchronously in the movable channel 621. The hook body of the adhesive removal hook 71 moves upwards from the bottom of the scraper 63. Then, the guide column 76 enters the first inclined section 73 and continues to slide, driving the two sets of adhesive removal hooks 71 to move downwards synchronously towards the front end of the scraper 63. At this time, the adhesive removal hooks 71 move from the rear end of the scraper 63 to the front end of the scraper 63. The hooks gradually contact the accumulated material at the front end of the scraper 63, realizing the gripping and pre-peeling of the accumulated material. During the downward movement, the hooks are fully embedded in the accumulated material and push forward to peel it off, completing the pushing and peeling of the accumulated material. Subsequently, the guide post 76 enters the second inclined section 74 and continues to slide, driving the two sets of adhesive removal hooks 71 to return to their original position at an angle downwards. At this time, the hook part of the adhesive removal hook 71 drives the peeled-off accumulated material downwards and away from the front end of the scraper, realizing the complete discharge of the accumulated material. At the same time, the guide post 76 returns to the bottom of the vertical section 72, and the adhesive removal hook 71 returns to the initial position, completing a complete cleaning cycle. When the scraper 63 moves along the length of the mold lip to scrape off the accumulated material, the adhesive removal hook 71 moves back and forth synchronously, realizing the continuous removal of the accumulated material at the front end of the scraper 63. This solves the problems of increased scraping resistance and incomplete scraping caused by the accumulation of material in traditional cleaning methods, and significantly improves the efficiency and cleanliness of mold lip cleaning.

[0048] It should be noted that when the de-adhesive hook 71 slides along the triangular guide groove to the top, there is a certain gap between the top of the de-adhesive hook 71 and the die lip of the casting film head 5, so as to avoid the de-adhesive hook 71 interfering with the die lip when it moves to the highest point, and at the same time ensure that the material accumulated at the front end of the scraper 63 can be completely removed.

[0049] The limiting device includes a square boss 77 located at the bottom of another adhesive removal hook 71, and a fixed frame 78 located on the other side of the movable channel 621. The fixed frame 78 is rectangular and has a limiting groove inside for the square boss 77 to slide along the forward direction of the scraper 63. The movable channel 621 also has a lifting groove 622 for the fixed frame 78 to slide along the vertical section 72. Therefore, when the guide post 76 moves the adhesive removal hook 71 up and down, the square boss 77 moves the fixed frame 78 up and down synchronously along the lifting groove 622. When the guide post 76 moves the adhesive removal hook 71 along the length direction of the scraper 63, the square boss 77 slides synchronously along the limiting groove, thereby ensuring that the adhesive removal hook 71 remains vertical during movement and does not deflect.

[0050] Specifically, when the guide post 76 slides upward along the vertical section 72, the square boss 77 remains stationary in the limiting groove, and the fixing frame 78 slides upward in the lifting slide 622 synchronously with the guide post 76. When the guide post 76 slides along the first inclined section 73, the square boss 77 slides synchronously in the limiting groove along the forward direction of the scraper 63, while the fixing frame 78 moves downward synchronously along the lifting slide 622. When the guide post 76 slides along the second inclined section 74, the square boss 77 slides synchronously in the limiting groove in the opposite direction of the forward movement of the scraper 63, and the fixing frame 78 continues to move downward along the lifting slide 622 until the bottom of the lifting slide 622.

[0051] The sliding assembly 62 has an outwardly protruding ring mechanism 623 on its sidewall. The fixed base 61 is provided with a first sliding groove 611 for the ring mechanism 623 to slide. The surface of the ring mechanism 623 has a vertically arranged linear guide rail 624. The linkage transmission mechanism includes a transmission rod 625 that is slidably engaged within the linear guide rail 624. One end of the transmission rod 625 facing the inside of the ring mechanism 623 is rotatably connected to a swing rod 626. The other end of the swing rod 626 is hinged to the connecting rod 75. The sliding assembly 62 is provided with a swing gap 627 for the swing rod 626 to move. The inner wall of the first sliding groove 611 is provided with a sinusoidal curve guide rail 612 that is slidably engaged with the transmission rod 625.

[0052] In use, the drive device drives the sliding assembly 62 to move horizontally along the length of the casting film head 5 within the fixed base 61. At this time, the convex ring mechanism 623 moves horizontally synchronously along the first slide groove 611. During the movement, the transmission rod 625 slides back and forth along the straight guide rail 624 under the guidance of the sinusoidal curve guide rail 612. When the transmission rod 625 rises along the sinusoidal curve guide rail 612, it drives the swing rod 626 to swing around the hinge point between it and the connecting rod 75, thereby driving the connecting rod 75 to pull the guide column 76 upward along the vertical section 72 of the triangular guide groove. When the transmission rod 625 moves downward, the swing rod 626 drives the connecting rod 75 to push the guide column 76 to move along the first inclined section 73 and the second inclined section 74 in sequence, realizing the reciprocating triangular trajectory action of the glue removal hook 71.

[0053] The triangular guide groove is also provided with a backstop mechanism to prevent the guide post 76 from sliding in the opposite direction. The backstop mechanism includes a first backstop block 81 slidably connected to the bottom left end of the first inclined section 73. The left end of the first backstop block 81 is provided with a first spring 82. The top of the first backstop block 81 has a first extension surface that continuously engages with the bottom surface of the first inclined section 73. The bottom of the first backstop block 81 has a first guide surface, which is used to push the first backstop block 81 to slide to the left along the first guide surface when the guide post 76 enters the first inclined section 73 from the vertical section 72. It also includes a second backstop block 83 slidably connected to the right side of the bottom of the vertical section 72. The bottom of the second backstop block 83 is provided with a second spring 84. The left side of the second backstop block 83 has a second extension surface that continuously engages with the vertical section 72. The top of the second backstop block 83 has a second guide surface, which is used to push the second backstop block 83 to slide downward along the second guide surface when the guide post 76 enters the vertical section 72 from the second inclined section 74.

[0054] Therefore, when the guide post 76 moves upward along the vertical section 72 to the top and turns to enter the first inclined section 73, the guide post 76 contacts the first guide surface of the first anti-reverse block 81 and applies pressure along its inclined surface, forcing the first anti-reverse block 81 to slide to the left against the elastic force of the first spring 82 until the guide post 76 is fully entered into the first inclined section 73. At this time, the first anti-reverse block 81 is reset under the action of the first spring 82, and its first extension surface is once again attached to the bottom surface of the first inclined section 73, guiding the guide post 76 to slide into the first inclined section 73 and preventing the guide post 76 from sliding back in the reverse direction during subsequent movements. Vertical section 72; Similarly, when the guide post 76 descends along the second inclined section 74 to the bottom and turns to enter the vertical section 72, the guide post 76 contacts the second guide surface of the second anti-reverse block 83 and applies downward pressure, forcing the second anti-reverse block 83 to overcome the elastic force of the second spring 84 and slide downward until the guide post 76 completely enters the vertical section 72. At this time, the second anti-reverse block 83 is reset under the action of the second spring 84, and its second extension surface is re-adhered to the right side wall of the vertical section 72, realizing unidirectional guidance of the guide post 76 and preventing it from sliding backward from the vertical section 72 into the second inclined section 74.

[0055] The driving device includes a driving screw 91 located at the bottom of the fixed base 61, and a first motor 92 located at one end of the fixed base 61 to drive the driving screw 91 to rotate. The bottom of the sliding component 62 has a slider 93 threadedly connected to the driving screw 91. The fixed base 61 is provided with a second groove 613 for the slider 93 to slide along the length of the casting head 5. In use, after the first motor 92 is started, the driving screw 91 rotates, driving the slider 93 to move along the second groove 613, thereby realizing the movement of the sliding component 62 along the length of the casting head 5. The scraper 63 moves synchronously with the sliding component 62 to scrape and clean the accumulated material on the surface of the die lip at the outlet of the casting head 5, ensuring that the movement path of the scraper 63 remains straight, avoiding scratches or damage to the surface of the die lip due to deflection, and extending the service life of the die lip.

[0056] Since the blade direction of scraper 63 is fixed, after scraper 63 moves to one end of fixed base 61, it needs to return to the other end of fixed base 61 to continue cleaning. Therefore, a connecting shaft 628 is provided at the bottom of the convex ring mechanism 623. The connecting shaft 628 is coaxial with and rotatably connected to slider 93. A one-way bearing 629 is sleeved on the connecting shaft 628. A transmission gear 6210 is sleeved on the outside of the one-way bearing 629. The fixed base 61 is provided with a third slide groove 614 for the transmission gear 6210 to slide synchronously with the convex ring mechanism 623. Each end of the third slide groove 614 is provided with a set of gears that mesh with the transmission gear 6210. The racks 615 are arranged in pairs, with two sets of racks 615 located on both sides of the third slide groove 614 and their tooth surfaces facing each other. The sidewall of the sliding component 62 has two sets of oppositely arranged locking grooves 6211. The top of the fixed base 61 has a fourth slide groove 616 that slides with the sliding component 62. The fourth slide groove 616 includes a locking groove 617 in the middle that matches the locking groove 6211, and arc-shaped slide rails 618 at both ends for the sliding component 62 to rotate. The sinusoidal guide rails 612 are provided in two sets and are located on both sides of the first slide groove 611. The two ends of the two sinusoidal guide rails 612 are connected by continuous arc-shaped guide rails.

[0057] Therefore, when the sliding component 62 slides along the middle of the fourth slide groove 616, the scraper 63 corresponds to the die lip area of ​​the casting film head 5 outlet, and the locking groove 6211 slides along the locking slide groove 617 to prevent the sliding component 62 from shifting or shaking, ensuring its stability during linear reciprocating motion; when the sliding component 62 moves to the arc-shaped slides 618 at both ends of the fourth slide groove 616, the scraper 63 disengages from the die lip area and enters the non-working reversing stage. At the same time, the locking groove 6211 disengages from the locking slide groove 617, and the transmission gear 6210 meshes with the rack 615 on the corresponding side and begins transmission. The one-way bearing 629 is in a locked state at this time, so that the convex ring mechanism 623 is in the transmission gear 6210. Driven by the rotation of the scraper 63 within the arc-shaped slide 618, the scraper 63 rotates 180 degrees simultaneously, at which point the blade direction is reversed to face the discharge port of the casting film head 5. After the scraper 63 completes its rotation, the first motor 92 drives the drive screw 91 to rotate in the opposite direction. At this time, the rack 615 drives the transmission gear 6210 to rotate in the opposite direction, while the one-way bearing 629 is in a free-rotating state. The convex ring mechanism 623 remains stationary. Then, the sliding component 62 enters the snap-fit ​​slide 617 and slides, causing the scraper 63 to perform a reverse cleaning action along the surface of the mold lip. The same applies when the sliding component 62 moves to the arc-shaped slide 618 at the other end of the fourth slide 616, thereby realizing the double-pass material removal operation of the scraper 63 and improving the cleaning efficiency.

[0058] The sliding component 62 is also fixed with a collection box 10 for collecting scraper waste. The collection box 10 is provided with a clearance opening 101 for the glue removal hook 71 to pass through on the side near the sliding component 62. Therefore, when the first inclined section 73 and the second inclined section 74 of the glue removal hook 71 move downward along the triangular trajectory, the hook part of the glue removal hook 71 enters the inside of the collection box 10 through the clearance opening 101. At the same time, when it resets and enters the active channel 621, the accumulated material on the glue removal hook 71 can be scraped off and guided into the collection box 10. The material guide slope is set from top to bottom on the side of the collection box 10 near the sliding component 62. After the accumulated material is scraped off, it slides down the material guide slope to the bottom of the collection box 10 for easy centralized cleaning.

[0059] The clearance opening 101 is provided on the side wall of the collection box 10, corresponding to the movement trajectory of the adhesive removal hook 71, to ensure that the adhesive removal hook 71 passes smoothly during reciprocating motion.

[0060] The blade of the scraper 63 has an inwardly inclined wedge-shaped structure from top to bottom, so the scraped material slides down and the adhesive removal hook 71 slides down the guide slope to the bottom of the collection box 10.

[0061] The frame 4 is also equipped with a rotating arm 11 that drives the cleaning mechanism 6 to rotate. The bottom of the rotating arm 11 is fixedly connected to one end of the cleaning mechanism 6. The frame 4 is fixed with a drive component 12 for driving the rotating arm 11 to rotate. The output end of the drive component 12 is connected to the rotating arm 11. The drive component 12 is a motor. When it is necessary to scrape off the accumulated material, the drive component 12 is started. The rotating arm 11 drives the cleaning mechanism 6 to rotate around the rotating shaft, so that the scraper 63 is accurately aligned with the bottom of the die lip outlet. After cleaning, the drive component 12 runs in reverse, so that the rotating arm 11 drives the cleaning mechanism 6 to return to the non-working position, so as to avoid interfering with the normal casting operation.

[0062] Any aspects of this invention not described in detail are well-known to those skilled in the art.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high and low temperature TPU in-mold composite casting machine, the structure of which includes: The casting mechanism (1), cooling and forming mechanism (2), and winding mechanism (3) are provided. The casting mechanism (1) includes a casting head (5) fixed below the frame (4). The casting mechanism (1) is characterized by further including a cleaning mechanism (6) rotatably connected to the frame (4) for removing material buildup on the die lip of the casting head (5). The cleaning mechanism (6) includes a fixed base (61) and a sliding component (62). The fixed base (61) is provided with a mechanism to drive the sliding component (62) along the length of the casting head (5). The sliding drive device has a scraper (63) at the top of the sliding assembly (62) that can be inserted into the gap between the die lip of the casting film head (5). The sliding assembly (62) also has a discharge mechanism (7) for reciprocatingly cleaning the material accumulated at the front end of the scraper (63). The discharge mechanism (7) includes a de-adhesive hook (71) provided in the sliding assembly (62) and a transmission assembly for driving the de-adhesive hook (71) to move along the side wall of the scraper (63) in a triangular trajectory to remove the material accumulated at the front end of the scraper (63). Two hooks (71) are provided and are arranged side by side on the front and rear sides of the scraper (63); the top and front end of the sliding assembly (62) are provided with an active channel (621) for the reciprocating motion of the adhesive removal hooks (71); the transmission assembly includes a triangular guide groove provided on one side of the active channel (621); the triangular guide groove includes a vertical section (72) provided near the rear end of the sliding assembly (62), a first inclined section (73) connected to the top of the vertical section (72) and extending towards the front end of the sliding assembly (62), and a second inclined section (74) connected between the end of the first inclined section (73) and the bottom end of the vertical section (72); the bottoms of the two adhesive removal hooks (71) are connected by a connecting rod (75); the bottom of one of the adhesive removal hooks (71) is provided with a guide post (76) that slides with the triangular guide groove; the assembly also includes a limiting device for fixing the adhesive removal hook (71) in a vertical state within the active channel (621); and a linkage transmission mechanism for driving the guide post (76) to reciprocate along the triangular guide groove.

2. The high and low temperature TPU in-mold composite casting machine as described in claim 1, characterized in that: The limiting device includes a square boss (77) located at the bottom of another adhesive removal hook (71) and a fixed frame (78) located on the other side of the movable channel (621). The fixed frame (78) is rectangular and has a limiting groove inside for the square boss (77) to slide along the forward direction of the scraper (63). The movable channel (621) also has a lifting groove (622) for the fixed frame (78) to slide along the vertical section (72).

3. The high and low temperature TPU in-mold composite casting machine as described in claim 2, characterized in that: The sliding assembly (62) has an outwardly protruding ring mechanism (623) on its sidewall. The fixed base (61) is provided with a first groove (611) for the ring mechanism (623) to slide. The surface of the ring mechanism (623) is provided with a vertically arranged linear guide rail (624). The linkage transmission mechanism includes a transmission rod (625) that slides within the linear guide rail (624). One end of the transmission rod (625) facing the inside of the ring mechanism (623) is rotatably connected to a swing rod (626). The other end of the swing rod (626) is hinged to the connecting rod (75). The sliding assembly (62) is provided with a swing gap (627) for the swing rod (626) to move. The inner wall of the first groove (611) is provided with a sinusoidal curve guide rail (612) that slides with the transmission rod (625).

4. The high and low temperature TPU in-mold composite casting machine as described in claim 3, characterized in that: The triangular guide groove is also provided with a backstop mechanism to prevent the guide post (76) from sliding in the opposite direction; the backstop mechanism includes a first backstop block (81) slidably connected to the bottom of the left end of the first inclined section (73), the left end of the first backstop block (81) is provided with a first spring (82), the top of the first backstop block (81) has a first extension surface that continuously cooperates with the bottom surface of the first inclined section (73), and the bottom of the first backstop block (81) has a first guide surface, which is used to guide the guide post (76) as it enters the first inclined section (73) from the vertical section (72) along the... The first guide surface pushes the first anti-reverse block (81) to slide to the left; it also includes a second anti-reverse block (83) slidably connected to the bottom right side of the vertical section (72), the bottom of the second anti-reverse block (83) is provided with a second spring (84), the left side of the second anti-reverse block (83) has a second extension surface that is continuously engaged with the vertical section (72), and the top of the second anti-reverse block (83) has a second guide surface, which is used to push the second anti-reverse block (83) to slide downward along the second guide surface when the guide post (76) enters the vertical section (72) from the second inclined section (74).

5. A high and low temperature TPU in-mold composite casting machine as described in any one of claims 3 or 4, characterized in that: The driving device includes a driving screw (91) located at the bottom of the fixed base (61) and a first motor (92) located at one end of the fixed base (61) to drive the driving screw (91) to rotate. The bottom of the sliding assembly (62) has a slider (93) that is threadedly connected to the driving screw (91). The fixed base (61) is provided with a second groove (613) for the slider (93) to slide along the length direction of the casting film head (5).

6. The high and low temperature TPU in-mold composite casting machine as described in claim 5, characterized in that: The bottom of the convex ring mechanism (623) is provided with a connecting shaft (628), which is coaxial with and rotatably connected to the slider (93). A one-way bearing (629) is sleeved on the connecting shaft (628), and a transmission gear (6210) is sleeved on the outside of the one-way bearing (629). The fixed base (61) is provided with a third slide groove (614) for the transmission gear (6210) to slide synchronously with the convex ring mechanism (623). Each end of the third slide groove (614) is provided with a set of racks (615) that mesh with the transmission gear (6210). The two sets of racks (615) are respectively located in the third slide groove (614). The sliding component (62) has two sets of opposing locking grooves (6211) on its sidewalls. The fixed base (61) has a fourth sliding groove (616) at its top end that slides with the sliding component (62). The fourth sliding groove (616) includes a locking groove (617) in the middle that matches the locking groove (6211), and arc-shaped slides (618) at both ends for the sliding component (62) to rotate. The sine curve guide rail (612) has two sets and is located on both sides of the first sliding groove (611). The two ends of the two sine curve guide rails (612) are connected by continuous arc-shaped guide rails.

7. The high and low temperature TPU in-mold composite casting machine as described in claim 5, characterized in that: The side wall of the sliding component (62) is also fixed with a collection box (10) for collecting scraper waste. The collection box (10) has an avoidance opening (101) for the glue removal hook (71) to pass through on the side near the sliding component (62). The material guide slope inside the collection box (10) is inclined from top to bottom on the side near the sliding component (62).

8. The high and low temperature TPU in-mold composite casting machine as described in claim 6, characterized in that: The blade of the scraper (63) has an inwardly inclined wedge-shaped structure from top to bottom.

9. The high and low temperature TPU in-mold composite casting machine as described in claim 1, characterized in that: The frame (4) is also provided with a rotating arm (11) that drives the cleaning mechanism (6) to rotate. The bottom of the rotating arm (11) is fixedly connected to one end of the cleaning mechanism (6). The frame (4) is fixed with a drive component (12) for driving the rotating arm (11) to rotate. The output end of the drive component (12) is connected to the rotating arm (11).

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