A plastic material extrusion circulation cooling device

Abstract

The present invention relates to the technical field of plastic material extrusion cooling, and specifically proposes a plastic material extrusion circulating cooling device, including a base, a fixing frame and an air cooling mechanism. The present invention performs multiple local air cooling on the floor film by cooperating with the middle area air cooling part and the two end area air cooling parts, and the cold air after the multiple local air cooling of the floor film enters the cooling chamber, and then the floor film is air cooled again as a whole, so that the cold air is reused and can be used to cool the floor film again, which greatly improves the cooling efficiency of the floor film; and when the end area air cooling part cools the floor film, the other side of the floor film is cooled and supported by the second cooling roller, preventing the floor film from being deformed by the wind during air cooling, and when the middle area air cooling part cools the middle area floor film, the middle area air cooling part also supports the middle area floor film, preventing the floor film from being deformed during air cooling, thereby improving the quality of the floor film.

Description

Technical Field

[0001] The invention relates to the technical field of plastic material extrusion cooling, and particularly proposes a plastic material extrusion circulation cooling device. Background Art

[0002] Silicone PU flooring membrane (silicon PU elastic layer) is a type of plastic material and the core functional layer of sports venue systems, providing excellent athletic performance and protection. Its exceptional elasticity provides moderate rebound (rebound rate exceeding 90%) for sports such as basketball, tennis, and badminton, protecting athletes' joints. Silicone PU flooring membranes are manufactured through a series of processes including batching and mixing, extrusion, molding through a mold, cooling and shaping, cutting, and trimming.

[0003] At present, when the floor film is circulated and cooled, the floor film is rolled and cooled by cooling rollers and conveyed, and then directly blown over a large area to cool the floor film.

[0004] However, the existing cooling method has the following problems: 1. The large-area blowing method is used to cool the floor film, which is prone to uneven cooling of the floor film during movement, resulting in large internal stress in the floor film. In addition, when the floor film moves to the suspended area, the cold wind can easily deform the floor film, reducing the production quality of the floor film; 2. The large-area blowing method is prone to rapid leakage of the air source, making it difficult to fully utilize. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present invention provides a plastic material extrusion circulation cooling device to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides the following technical solution: a plastic material extrusion circulation cooling device, comprising a base and two fixed frames provided thereon, a cooling roller 1 and four cooling rollers 2 arranged in a rectangular shape are rotatably connected between the two fixed frames, the cooling roller 1 is located above the cooling roller 2 on one side, the cooling roller 1 and the corresponding cooling roller 2 cooperate to perform cooling roller pressure correction on the ground rubber film, and a driving source for driving the cooling roller 1 and the four cooling rollers 2 and a cooling liquid conveying device for circulating cooling liquid to the cooling roller 1 and the four cooling rollers 2 are installed on the fixed frame.

[0007] The driving source is a motor installed on a fixed frame and connected to one of the cooling rollers 2 or the cooling roller 1. The cooling roller 1 and the upper and lower cooling rollers 2 are all fixedly sleeved with meshing transmission gears.

[0008] An air cooling mechanism is installed between the two fixed frames, and a cooling cavity is formed between the air cooling mechanism and the four cooling rollers. The air cooling mechanism includes a sealing cover installed between the two fixed frames, an air duct is installed in the sealing cover, and a middle area air cooling part and two end area air cooling parts connected by the air duct are connected to the external fan.

[0009] The areas where the side walls of the two cooling rollers on the upper side are covered by the floor film are the entry area and the discharge area respectively, and the area between the two cooling rollers on the lower side is the middle area. The two end area air cooling parts respectively cool the floor film covered on the entry area and the discharge area, and the middle area air cooling part cools the floor film located in the middle area. The middle area air cooling part is also provided with a supporting component for supporting the floor film during cooling.

[0010] The sealing cover is provided with a direction-changing portion, which is used to change the blowing direction when the middle zone air-cooling portion and the two end zone air-cooling portions perform local air cooling on the floor film.

[0011] After the middle zone air cooling part and the two end zone air cooling parts have performed multiple local air cooling on the floor film, the air enters the cooling cavity and then performs overall air cooling on the floor film again.

[0012] In one possible implementation, the sealing cover includes two side panels arranged along the length direction of the base, and support rings are installed at both ends of the side panels along the length direction and are mounted on the corresponding two cooling rollers. The support rings are rotatably connected to the cooling rollers. A top plate is installed between the two side panels, and an air duct passes through the top plate. The two side panels are respectively connected to corresponding fixing frames.

[0013] In one possible implementation, the end zone air cooling portion includes an arc box that is coaxial with the corresponding cooling roller 2 located on the upper side, the inner wall of the arc box is connected to an arc plate that slides along its length, the arc plate is provided with evenly arranged blowing holes, and the upper end of the inner arc surface of the arc box is equipped with an elastic sealing assembly that cooperates with the corresponding cooling roller 2.

[0014] In one possible implementation, the elastic sealing assembly includes a mounting groove formed on the inner arc surface of the arc box, a mounting seat is slidably connected in the mounting groove, a pressure roller is rotatably connected in the mounting seat, and a plurality of evenly distributed return springs are installed between the mounting groove and the mounting seat.

[0015] In one possible implementation, the central air-cooling portion includes a fixed box installed in a sealed cover, a movable plate sliding along its length direction is installed on the inner wall of the lower end of the fixed box, and evenly distributed blowing holes are opened on the movable plate.

[0016] In one possible implementation, the supporting assembly is located below the movable plate, and the supporting assembly includes two conveying rollers rotatably connected to the lower end of the sealing cover, and a conveyor belt supporting the floor film is installed between the two conveying rollers, and one of the conveying rollers is connected to one of the cooling rollers through a transmission member.

[0017] In one possible implementation, the changing portion includes dividing strips evenly arranged along their respective length directions, which are installed on the lower end surface of the fixed box and the inner arc side wall of the arc box. The dividing strips are fitted with corresponding arc plates or movable plates. The dividing strips are provided with inclined holes evenly arranged along their length directions. The inclined holes on the same dividing strip have different inclination directions. The side wall of the sealing cover is installed with a linkage component that drives the movable plate to move synchronously with the two arc plates when one of the cooling rollers rotates.

[0018] In one possible implementation, the linkage assembly includes a movable plate and connecting plates installed at both ends of the two arc-shaped plates in the length direction. The three connecting plates on the same side slide through the sealing cover and are jointly installed with a connecting frame. Two of the cooling rollers arranged along the width direction of the base are fixed with rotating sleeves at both ends, and guide grooves are provided on the rotating sleeves. The guide grooves on the two rotating sleeves connected to the same cooling roller 2 are in the same direction, and the guide grooves are composed of two inclined grooves symmetrically arranged along the axis of the rotating sleeve and connected at both ends. Guide rods slidably connected to the guide grooves are installed on the two connecting frames.

[0019] In one possible implementation, an auxiliary supporting assembly is installed between the fixed box and the two arc-shaped boxes.

[0020] In one possible implementation, the auxiliary support assembly includes a fixing bar installed between the top of the fixing box and the two arc boxes through ribs, and the fixing bar is rollingly connected to a ball that rolls against the two side walls of the adjacent cooling roller located on the lower side.

[0021] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A plastic material extrusion circulation cooling device designed by the present invention performs multiple local air cooling on the floor film through the cooperation of the middle zone air cooling part and the two end zone air cooling parts, and the cold air after the multiple local air cooling of the floor film enters the cooling chamber, and then the floor film is air cooled again as a whole, so that the cold air is reused and can be used to cool the floor film again, which greatly improves the cooling efficiency of the floor film; and when the end zone air cooling part cools the floor film, the other side of the floor film is cooled and supported by the cooling roller 2, and the end zone air cooling part cooperates with the corresponding cooling roller 2 to prevent the floor film from being deformed by wind force during air cooling, and when the middle zone air cooling part cools the middle zone floor film, the middle zone air cooling part also supports the middle zone floor film to prevent the floor film from being deformed during air cooling, thereby improving the quality of the floor film.

[0022] 2. The direction-changing part in the present invention is used to change the blowing direction when the middle area air-cooling part and the two end area air-cooling parts perform local air cooling on the floor film. At the same time, it can also perform mobile blowing on the floor film. The wind force is soft and dispersed, reducing the single-point force, and the wind coverage is more uniform, further improving the production quality of the floor film. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0025] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional three-dimensional structure.

[0026] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the end zone air-cooling part of the present invention.

[0027] Figure 4 It is a rear cross-sectional view of the present invention.

[0028] Figure 5 yes Figure 4 A in the enlarged view.

[0029] Figure 6 yes Figure 2 Enlarged view of point B in .

[0030] 1. Cooling roller 2. Cooling roller 3. Cooling roller 4. Cooling roller 5. Air cooling mechanism 6. Sealing cover 7. Side plate 8. Top plate 9. Support ring 10. Air duct 11. Middle air cooling section 12. Fixed box 13. Movable plate 14. End air cooling section 15. Arc box 16. Arc plate 17. Direction changing section 18. Dividing bar 19. Inclined hole 20. Mounting seat 21. Pressing roller 22. Return spring 23. Conveyor roller 24. Conveyor belt 25. Connecting plate 26. Connecting frame 27. Rotating sleeve 28. Guide rod 29. Auxiliary supporting assembly 30. Fixed bar 31. Floor film 32. Floor film 33. Floor film 34. Floor film 35. Floor film 36. Floor film DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] See Figure 1 A plastic material extrusion circulation cooling device includes a base 1 and two fixed frames 2 provided thereon, a cooling roller 3 and four cooling rollers 2 4 arranged in a rectangular shape are rotatably connected between the two fixed frames 2, the cooling roller 1 3 is located above the cooling roller 2 4 on one side, and the cooling roller 1 3 cooperates with the corresponding cooling roller 2 4 to perform cooling roller pressure correction on the ground film 7, and a driving source for driving the cooling roller 1 3 and the four cooling rollers 2 4 and a cooling liquid conveying device for circulating cooling liquid to the cooling roller 1 3 and the four cooling rollers 2 4 are installed on the fixed frame 2.

[0034] Specifically, the driving source is a motor installed on the fixed frame 2 and connected to one of the cooling rollers 2 4 or the cooling roller 1 3. The cooling roller 1 3 and the upper and lower cooling rollers 2 4 are all fixed with meshing transmission gears (not shown in the figure).

[0035] After being extruded from the mold, the floor film 7 enters between the cooling roller 1 3 and the adjacent cooling roller 2 4 , and then winds around the remaining cooling roller 2 4 . The cooling roller 1 3 cooperates with the four cooling rollers 2 4 to cool the floor film 7 .

[0036] See Figure 1 、 Figure 2 and Figure 4 An air cooling mechanism 5 is installed between the two fixed frames 2, and a cooling chamber 6 is formed between the air cooling mechanism 5 and the four cooling rollers 24. The air cooling mechanism 5 includes a sealing cover 50 installed between the two fixed frames 2, and an air duct 51 and a middle area air cooling part 52 and two end area air cooling parts 53 connected to the air duct 51 are installed in the sealing cover 50. The air duct 51 is connected to an external fan.

[0037] See Figure 4 The areas where the side walls of the two cooling rollers 2 4 on the upper side are covered by the floor film 7 are the entry area and the discharge area respectively, and the area between the two cooling rollers 2 4 on the lower side is the middle area.

[0038] The two end area air cooling parts 53 respectively cool the floor rubber film 7 covered on the entry area and the discharge area, so that the floor rubber film 7 is cooled by the cooling roller 2 4 and the air cooling at the same time, and when the two end area air cooling parts 53 cool the floor rubber film 7, the other side of the floor rubber film 7 is supported by the cooling roller 2 4, and the two cooperate with each other to prevent the floor rubber film 7 from being deformed by wind force during air cooling. The middle area air cooling part 52 cools the floor rubber film 7 located in the middle area. The middle area air cooling part 52 is also provided with a supporting component for supporting the floor rubber film 7 during cooling to prevent the floor rubber film 7 from being deformed during air cooling. The cold air after the middle area air cooling part 52 and the two end area air cooling parts 53 perform multiple local air cooling on the floor rubber film 7 enters the cooling chamber 6, and then the floor rubber film 7 is cooled again as a whole, so that the cold air is reused and can also be used to cool the floor rubber film 7 again, which greatly improves the cooling efficiency of the floor rubber film 7.

[0039] See Figure 1 and Figure 2 The sealing cover 50 is provided with a changing part 54, which is used to change the blowing direction when the middle area air cooling part 52 and the two end area air cooling parts 53 perform local air cooling on the floor film 7. At the same time, it can also perform mobile blowing on the floor film 7, and the wind force is soft and dispersed, reducing the single point force, and the wind coverage is more uniform.

[0040] See Figure 1 、 Figure 2 and Figure 4 The sealing cover 50 includes two side plates 501 arranged along the length direction of the base 1. Support rings 503 are installed on the two corresponding cooling rollers 2 4 at both ends of the side plates 501 along the length direction. The support rings 503 are rotatably connected to the cooling rollers 2 4. A top plate 502 is installed between the two side plates 501. The air duct 51 passes through the top plate 502. The two side plates 501 are respectively connected to the corresponding fixing frames 2.

[0041] The two side panels 501, the top panel 502, and the support ring 503 cooperate to form a cooling chamber 6 between the four cooling rollers 2 4. The support ring 503 cooperates with the cooling rollers 2 4 to improve the installation stability of the sealing cover 50. It should be noted that the cooling chamber 6 is not completely sealed, and the partial gap does not affect the cooling of the floor film 7 by the cold air in the cooling chamber 6.

[0042] See Figure 2 、 Figure 3 、 Figure 4 and Figure 5The end zone air-cooling part 53 includes an arc box 530 that is coaxial with the corresponding cooling roller 2 4 located on the upper side. The inner wall of the arc box 530 is connected to an arc plate 531 that slides along its length direction. The arc plate 531 is provided with evenly arranged blowing holes, thereby expanding the air-cooling range of the end zone air-cooling part 53 to the floor film 7. An elastic sealing component that cooperates with the corresponding cooling roller 2 4 is installed on the upper end of the inner arc surface of the arc box 530. The elastic sealing component includes a mounting groove provided on the inner arc surface of the arc box 530, a mounting seat 550 is slidably connected in the mounting groove, a pressure roller 551 is rotatably connected in the mounting seat 550, and a plurality of evenly arranged return springs 552 are installed between the mounting groove and the mounting seat 550.

[0043] The pressing roller 551 is pressed against the floor film 7 wrapped on the corresponding cooling roller under the elastic force of the return spring 552, thereby sealing the floor film 7 wrapped on the cooling roller 2 4 by the arc box 530, preventing the cold air blown out by the end zone air cooling part 53 from being directly discharged from between it and the two cooling rollers 2 4 located on the upper side, and being difficult to be reused. The air duct 51 transports cold air into the two arc boxes 530, and the cold air is blown toward the floor film 7 that has just entered the cooling chamber 6 and is about to move out of the cooling chamber 6 through the blowing holes on the arc plate 531, so that the floor film 7 obtains a local air cooling effect in both the entering and moving-out sections of the cooling chamber 6. At the same time, the changing part 54 drives the arc plate 531 to blow air to the floor film 7 while moving, so that the air cooling is more dispersed, thereby reducing the damage and deformation of the floor film 7 during air cooling.

[0044] See Figure 4 The middle zone air cooling part 52 includes a fixed box 520 installed in the sealing cover 50. The inner wall of the lower end of the fixed box 520 is installed with a movable plate 521 that slides along its length direction. The movable plate 521 is provided with evenly arranged blowing holes. The air duct 51 transports cold air into the fixed box 520. The cold air cools the floor film 7 that moves to the middle zone through the blowing holes on the movable plate 521. At the same time, the changing part 54 also drives the movable plate 521 to move, which also makes the cold air more dispersed.

[0045] See Figure 2 and Figure 4 The supporting assembly is located below the movable plate 521 and includes two conveying rollers 560 rotatably connected to the lower end of the sealing cover 50. A conveyor belt 561 for supporting the floor film 7 is installed between the two conveying rollers 560. One of the conveying rollers 560 is connected to one of the cooling rollers 24 through a transmission member.

[0046] Specifically, the transmission member is a sprocket chain. When the cooling roller 24, which is connected to the conveying roller 560 through a sprocket chain transmission, rotates, it synchronously drives the conveying roller 560 to rotate, and the conveying roller 560 drives the conveyor belt 561 to move. During the movement of the conveyor belt 561, the floor film 7 is supported, thereby preventing the friction between the conveyor belt 561 and the floor film 7 from causing damage to the floor film 7. When the cold air cools the floor film 7 through the blowing holes on the movable plate 521, the support of the conveyor belt 561 on the floor film 7 also avoids deformation of the floor film 7 during air cooling, thereby improving the quality of the floor film 7 after cooling.

[0047] See Figure 2 、 Figure 3 and Figure 4 The deflection portion 54 includes a dividing strip 540 evenly arranged along their respective length directions, which is installed on the lower end surface of the fixed box 520 and the inner arc side wall of the arc box 530. The dividing strip 540 is fitted with the corresponding arc plate 531 or the movable plate 521. The dividing strip 540 is provided with inclined holes 541 evenly arranged along its length direction. The inclined holes 541 on the same dividing strip 540 have different inclination directions. During the movement of the movable plate 521 or the arc plate 531, when the blowing hole is connected to the inclined hole 541, the cold air cools the floor film 7 through the blowing hole and the inclined hole 541, thereby changing the wind direction during blowing and improving the uniformity of cooling the floor film 7. The side wall of the sealing cover 50 is installed with a linkage component that drives the movable plate 521 and the two arc plates 531 to move synchronously when one of the cooling rollers 24 rotates.

[0048] See Figure 2 、 Figure 3 、 Figure 4 and Figure 6 The linkage assembly includes a movable plate 521 and connecting plates 570 installed at both ends of the length direction of the two arc-shaped plates 531. The three connecting plates 570 on the same side slide through the sealing cover 50 and are jointly installed with a connecting frame 571. Two of the cooling rollers 24 arranged along the width direction of the base 1 are fixedly sleeved with rotating sleeves 572 at both ends. A guide groove is provided on the rotating sleeve 572. The guide grooves on the two rotating sleeves 572 connected to the same cooling roller 24 are in the same direction. The guide groove consists of two inclined grooves symmetrically arranged along the axis of the rotating sleeve 572 and connected at both ends. Guide rods 573 slidingly connected to the guide grooves are installed on the two connecting frames 571.

[0049] When the cooling roller 2 4 drives the rotating sleeve 572 to rotate, the guide rod 573 slides along the guide groove, thereby driving the connecting frame 571, the movable plate 521 and the two arc plates 531 to move back and forth, so that the blowing holes move and blow air to the floor film 7, avoiding damage to the floor film 7 caused by concentrated blowing.

[0050] See Figure 4An auxiliary supporting assembly 58 is installed between the fixed box 520 and the two arc boxes 530. The auxiliary supporting assembly 58 includes a fixing bar 580 installed between the top of the fixed box 520 and the two arc boxes 530 through ribs. The fixing bar 580 is rollingly connected with balls that roll against the side walls of the adjacent cooling roller 2 4 located on the lower side. The two arc boxes 530 are connected to the fixed box 520 and are supported on the two cooling rollers 2 4 located on the lower side by the balls on the fixing bar 580, thereby further improving the connection stability of the air cooling mechanism 5.

[0051] See Figure 1-Figure 5 Working principle: The air duct 51 transports air into the two curved boxes 530 and the fixed box 520. When the floor film 7 enters the cooling chamber 6, the air passes through the blowing holes on the curved plate 531 to blow and cool the floor film 7 that has just entered the cooling chamber 6, so that the floor film 7 obtains a local air cooling effect when entering the cooling chamber 6; when the floor film 7 moves to the middle area, the air in the fixed box 520 passes through the blowing holes on the movable plate 521 to locally cool the floor film 7 that has moved to the middle area; when the floor film 7 moves to the discharging area, the curved box 530 located in the discharging area blows local air to cool the floor film 7.

[0052] As a result, when the cooling roller 1 3 and the cooling roller 2 4 cool the floor film 7, the floor film 7 also obtains a cooling effect of multiple local air cooling under the air cooling action of the middle air cooling part 52 and the two end air cooling parts 53, and the air blown out by the middle air cooling part 52 and the two end air cooling parts 53 enters the cooling chamber 6, and then the floor film 7 is cooled again as a whole, so that the cold air is reused and the floor film 7 is cooled again, which greatly improves the cooling efficiency of the floor film 7.

[0053] When the middle zone air cooling part 52 and the two end zone air cooling parts 53 cool the floor film 7, the supporting assembly and the corresponding cooling roller 2 4 support the floor film 7 to prevent the floor film 7 from being deformed during air cooling. At the same time, the changing part 54 drives the movable plate 521 and the two curved plates 531 to move and blow air to the floor film 7, making the air cooling more dispersed, thereby further reducing the damage and deformation of the floor film 7 during air cooling.

[0054] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic material extrusion circulation cooling device, comprising a base and two fixed frames mounted thereon, wherein a cooling roller 1 and four cooling rollers 2 arranged in a rectangular pattern are rotatably connected between the two fixed frames, characterized in that: An air cooling mechanism is provided between the two fixed frames, and a cooling chamber is formed between the air cooling mechanism and the four cooling rollers. The areas on the opposite side walls of the two upper cooling rollers covered by the floor film are the entry area and the discharge area respectively, and the area between the other two cooling rollers is the middle area; The air cooling mechanism includes a sealing cover installed between two fixing frames, an air duct and a middle zone air cooling part and two end zone air cooling parts connected to the air duct are installed in the sealing cover; The central air cooling section provides local air cooling for the floor film in the central area. The central air cooling section is also provided with a supporting assembly for supporting the floor film during cooling. The two end air cooling sections provide local air cooling for the floor film in the inlet area and the outlet area respectively. The sealing cover is provided with a deflection portion for changing the blowing direction of the central air cooling section and the two end air cooling sections when performing local air cooling on the floor film. The air from the central zone air cooling unit and the two end zone air cooling units after multiple local air cooling on the floor film enters the cooling chamber and then air cools the floor film as a whole again; The sealing cover includes two side plates arranged along the length direction of the base, and support rings are installed at both ends of the side plates along the length direction, which are sleeved on the two corresponding cooling rollers. The support rings are rotatably connected to the cooling rollers. A top plate is installed between the two side plates, and an air duct passes through the top plate. The two side plates are respectively connected to corresponding fixing frames; The end zone air cooling part includes an arc-shaped box coaxial with the corresponding cooling roller 2 located on the upper side, the inner wall of the arc-shaped box is connected to an arc-shaped plate sliding along its length direction, the arc-shaped plate is provided with evenly arranged blowing holes, and an elastic sealing component cooperating with the corresponding cooling roller 2 is installed on the upper end of the inner arc surface of the arc-shaped box; The middle zone air cooling part includes a fixed box installed in the sealing cover, and the inner wall of the lower end of the fixed box is installed with a movable plate that slides along its length direction, and the movable plate is also provided with evenly arranged air blowing holes; The elastic sealing assembly includes an installation groove opened on the inner arc surface of the arc box, a mounting seat is slidably connected in the installation groove, a pressure roller is rotatably connected in the mounting seat, and a plurality of evenly arranged return springs are installed between the installation groove and the mounting seat. The pressure roller is pressed against the floor film covered on the corresponding cooling roller under the elastic force of the return spring.

2. The plastic material extrusion circulation cooling device according to claim 1, characterized in that: The changing part includes a dividing strip evenly arranged along the length direction installed on the lower end surface of the fixed box and the inner arc side wall of the arc box. The dividing strip is fitted with the corresponding arc plate or movable plate. The dividing strip is provided with inclined holes evenly arranged along its length direction. The inclined directions of the inclined holes on the same dividing strip are different. The side wall of the sealing cover is installed with a linkage component that drives the movable plate and the two arc plates to move synchronously when one of the cooling rollers rotates.

3. The plastic material extrusion circulation cooling device according to claim 1, characterized in that: The supporting assembly includes two conveying rollers rotatably connected to the lower end of the sealing cover, a conveying belt supporting the floor film is installed between the two conveying rollers, and one of the conveying rollers is connected to one of the cooling rollers through a transmission member.

4. The plastic material extrusion circulation cooling device according to claim 2, characterized in that: The linkage assembly includes a movable plate and connecting plates installed at both ends of the length direction of the two arc-shaped plates. The three connecting plates on the same side slide through the sealing cover and are jointly installed with a connecting frame. Two of the cooling rollers arranged along the width direction of the base are fixedly provided with rotating sleeves at both ends, and a guide groove is provided on the rotating sleeve. The guide grooves on the two rotating sleeves connected to the same cooling roller are in the same direction, and the two connecting frames are equipped with guide rods that are slidably connected to the guide grooves. When the cooling roller rotates, the guide groove and the guide rod cooperate to drive the movable plate and the two curved plates to move back and forth.

5. The plastic material extrusion circulation cooling device according to claim 1, characterized in that: An auxiliary supporting assembly is installed between the fixed box and the two arc boxes. The auxiliary supporting assembly is used to connect the fixed box and the two arc boxes and abut against the two cooling rollers 2 located on the lower side.

6. The plastic material extrusion circulation cooling device according to claim 5, characterized in that: The auxiliary supporting assembly includes a fixing bar installed between the top of the fixing box and the two arc boxes through ribs, and balls are rollingly connected on the fixing bar to roll against the two side walls of the adjacent cooling roller located on the lower side.

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