Equipment for producing polyurethane material

Abstract

Equipment for producing polyurethane materials is installed on a frame body and arranged behind a drying device and sequentially comprises a first conveying assembly, a first single-layer separation assembly, a return assembly, a second single-layer separation assembly and a second conveying assembly. According to the equipment, accurate separation of base layer paper and a polyurethane layer is guaranteed, meanwhile, the base layer paper can be stably conveyed to the winding roller through gravity, the base layer paper is pressed on the surface of the winding roller through cooperation of the pressing roller and the winding roller so that the base layer paper can be tightly wound, the base layer paper is prevented from slipping on the winding roller, and the service life of the base layer paper is prolonged. And the winding efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of polyurethane production, and in particular relates to equipment for producing polyurethane materials. Background Art

[0002] At present, spandex is the abbreviation of polyurethane fiber, which is an elastic fiber with high elasticity. It can be stretched 6 to 7 times, but it can quickly return to its original state with the disappearance of tension. Its molecular structure is a chain-like, soft and extensible polyurethane, which is connected with hard segments to enhance its properties. Elastic fibers are divided into two categories: one is polyester chain and the other is polyether chain. Polyester elastic fibers have strong antioxidant and oil resistance, while polyether elastic fibers have good mildew resistance and detergent resistance. In the process of producing polyurethane materials, polyurethane foam needs to be sandwiched between two base papers. The base paper can effectively reduce the problem of polyurethane foam adhering to the production materials during the production process due to the viscosity of polyurethane foam.

[0003] In the production of polyurethane materials, after the base paper is separated from the polyurethane foam, the base paper needs to be rewound. The document with the authorization announcement number CN218749440U discloses a polyurethane material production equipment, including a drying component, a shaping component, a traction component and a rewinding component; the drying component heats the base paper sandwiched with polyurethane foam; the shaping component forms a shaping spacing for the base paper sandwiched with polyurethane foam to pass through; the traction component is located between the shaping component and the rewinding component, and drives the base paper to move toward the rewinding component; the rewinding component is used to rewind the base paper: the rewinding component includes: a rewinding roller, which is rotatably arranged and connected to a power source, and the base paper is wound on the rewinding roller: a rotating member, one end of which is provided with a placement hole for the rewinding roller to be inserted, and rotates with the end away from the placement hole as the center of the circle, and the rotating member has a locking position and an unlocking position; a first cylinder, the piston rod is fixedly connected to the rotating member. After the base paper sandwiched with polyurethane foam passes through the shaping assembly, the polyurethane foam is separated from the base paper, the polyurethane foam enters the next production process, and the base paper is taken up by the winding roller.

[0004] However, in this solution, it is difficult to quickly separate the polyurethane foam and the base paper for the following reasons: first, the base paper has good peeling strength at room temperature, but after being heated by the drying component and the shaping component, its peeling strength decreases, thereby increasing the difficulty of separating the base paper and the polyurethane foam; second, the release paper has a smooth surface, and there is a problem that it cannot be tightly wound on the winding roller when being wound up by the winding roller.

[0005] To this end, the inventors have proposed a device for producing polyurethane materials to solve the above-mentioned technical problems. Summary of the invention

[0006] In view of the above-mentioned problems, the purpose of the present invention is to provide an equipment for producing polyurethane materials. By arranging a first transmission component, a first single-layer separation component, a return component, a second single-layer separation component, and a second transmission component, the accurate separation of the base paper and the polyurethane layer is ensured, and gravity can be used to stably transmit the base paper to the winding roller. Through the cooperation of the pressure roller and the winding roller, the base paper is pressed on the surface of the winding roller so that the base paper is tightly wound, thereby preventing the base paper from slipping on the winding roller and improving the winding efficiency.

[0007] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: an equipment for producing polyurethane materials, which is installed on a frame and arranged behind a drying device, and comprises a first transmission component, a first single-layer separation component, a return component, a second single-layer separation component, and a second transmission component in sequence; the return component is used to turn and transmit the polyurethane composite layer transmitted by the first transmission component to the second transmission component, and make the polyurethane composite layer transmitted by the first transmission component and the second transmission component be transported in parallel in opposite directions; the first single-layer separation component and the second single-layer separation component are respectively arranged at the lower ends of the polyurethane composite layer in two transmission directions, and are respectively used to separate the two layers of base paper on both sides of the polyurethane composite layer; the first single-layer separation component and the second single-layer separation component have the same structure, and both include a separation knife, a pressure roller and a winding roller located at the lower side of the separation knife and at both sides of the single layer of the base paper, and a fan used to blow the base paper to the connection between the pressure roller and the winding roller.

[0008] As a further preferred embodiment of the present invention, the pressure roller includes a pressure roller body, two first mounting plates arranged on both sides of the pressure roller body and connected to the frame, two mounting strip holes respectively arranged on the two first mounting plates, a rotating rod arranged on the pressure roller body and connected to the two mounting strip holes at both ends, a supporting spring arranged on the bottom surface of the mounting strip holes close to the frame and connected to the rotating rod, and a first limit bearing arranged on the rotating rod and located at the side end of the first mounting plate.

[0009] As a further preferred embodiment of the present invention, the winding roller includes a winding roller body, two second mounting plates arranged on both sides of the winding roller body and connected to the frame, a rotating shaft arranged on the winding roller body and rotatably connected to the two second mounting plates respectively, and a second limit bearing arranged on the rotating shaft and located at the side end of the second mounting plate.

[0010] As a further preferred embodiment of the present invention, the winding roller body includes a roller body, a roller cover detachably connected to the roller body, an annular tube arranged in the roller cover, a channel arranged on the surface of the roller cover away from the roller body, and a liquid outlet nozzle arranged on the outer peripheral side of the annular tube and connected to the channel.

[0011] As a further preferred embodiment of the present invention, the winding roller body also includes at least two elastic protrusions arranged opposite to each other on the inner side wall of the channel close to the liquid outlet nozzle to close the channel; the pressure roller also includes an extrusion protrusion arranged on the outer peripheral side of the pressure roller body and used to squeeze the elastic protrusions.

[0012] As a further preferred embodiment of the present invention, the winding roller body further includes a groove which is arranged on the outer surface of the roller body close to the hole and is connected to the hole.

[0013] As a further preferred embodiment of the present invention, the separation knife includes two extension rods respectively connected to the two ends of the rotating rod, a first fixed plate arranged between the ends of the two extension rods away from the rotating rod, and a knife body arranged on the first fixed plate and facing the polyurethane composite layer.

[0014] As a further preferred embodiment of the present invention, the fan includes two fixing rings respectively rotatably connected to the ends of the rotating rod, two mounting rods arranged on the two fixing rings, a second fixing plate arranged between the ends of the two mounting rods away from the fixing rings, and a fan body arranged on the second fixing plate.

[0015] As a further preferred embodiment of the present invention, the fan also includes a starting plate arranged on the side end of the fixing ring away from the mounting rod, an ear plate installed on the frame, and a screw screwed on the ear plate and acting on the starting plate; the extension direction of the screw is parallel to the distribution direction of the mounting strip holes.

[0016] As a further preferred embodiment of the present invention, the pressure roller also includes a sliding plate arranged on the side end of the rotating rod located in the mounting strip hole and connected to the support spring, a threaded hole arranged on the sliding plate, a positioning hole arranged on the first mounting plate, connected to the mounting strip hole and matching the threaded hole, and a positioning bolt passing through the positioning hole and connected to the threaded hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a structural schematic diagram of the present invention.

[0018] Attached Figure 2 It is a schematic structural diagram of the second single-layer separation component of the present invention.

[0019] Attached Figure 3It is a schematic diagram of the structure of the second single-layer separation component of the present invention from a top view.

[0020] Attached Figure 4 It is a schematic diagram of the local structure of the connection between the pressing roller and the winding roller of the present invention.

[0021] Description of the drawings: frame a, polyurethane composite layer b, base paper c, first transmission component 1, first single-layer separation component 2, return component 3, second single-layer separation component 4, second transmission component 5; Separating knife 41, pressing roller 42, winding roller 43, fan 44; Extension rod 411, first fixing plate 412, blade body 413; The pressing roller body 421, the first mounting plate 422, the mounting bar hole 423, the rotating rod 424, the supporting spring 425, the pressing protrusion 426, the sliding plate 427, and the threaded hole 428; Winding roller body 431, second mounting plate 432, rotating shaft 433; Roller body 431a, roller sleeve 431b, annular tube 431c, hole 431d, liquid outlet nozzle 431e, elastic protrusion 431f, groove 431g; A fixing ring 441 , a mounting rod 442 , a second fixing plate 443 , a fan body 444 , a starting plate 445 , an ear plate 446 , and a screw rod 447 . DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention provides a device for producing polyurethane material, such as the attached Figure 1As shown, after being installed on a frame and set in a drying device (not marked in the figure), the corresponding process of producing polyurethane materials includes: S1, drying: the polyurethane composite layer is sent to the drying device through the transmission device. After the polyurethane composite layer enters the drying device, the polyurethane composite layer is blown and heated, and then output from the drying device; S2. Separating the bottom base paper once: the polyurethane composite layer transmitted from the drying device is sent to the first single-layer separation component, and the base paper at the lower end of the polyurethane composite layer is separated from the polyurethane layer by a separation knife. The separated base paper hangs down to the winding roller under the action of gravity, and is wound on the winding roller for winding under the action of the pressure roller. The polyurethane composite layer with one layer of base paper removed is output from the first single-layer separation component along the original direction; S3, composite layer return: the polyurethane composite layer with a layer of base paper removed is changed in the transmission direction by the return component, and the polyurethane composite layer with a layer of base paper removed is transmitted in the opposite direction to the initial direction, the polyurethane composite layer is turned over, and the base paper remaining on the polyurethane composite layer is changed from the upper end of the polyurethane layer to the lower end of the polyurethane layer; S4, secondary separation of the bottom base paper: removing the remaining layer of base paper in the same steps as S2 and rolling up the base paper; S5, output: The polyurethane layer output device with the two layers of base paper removed is output to the next production process through the second transmission component.

[0025] It can be understood that the above-mentioned drying device can adopt existing equipment, generally including electric heaters, heating pipes, circulation pipes, waste pipes, fans, etc.; the transmission device is responsible for transmission connection during the entire process. In addition to the above-mentioned first transmission component, second transmission component, and return component, the transmission device also includes a transmission component for equipment used in other processing steps; the return component is installed on the frame, generally including multiple steering rollers and clamping rollers to ensure the stable steering and transmission of the polyurethane composite layer.

[0026] It is worth noting that in the process of producing polyurethane materials, the present invention separates the base paper of the upper and lower layers of the polyurethane composite layer by a two-step method, so that the base paper separated each time is located at the bottom, and after the base paper is separated from the polyurethane layer by the separation knife, the base paper can sag naturally under the action of gravity, so that it can be efficiently captured by the winding roller, and under the action of the pressure roller, the base paper is tightly wound by the winding roller. The fan can blow the naturally drooping base paper to the winding roller in a directional manner, thereby improving the efficiency of the base paper being captured by the winding roller.

[0027] Therefore, compared with the prior art, the equipment used in the present invention has the following advantages: first, it can overcome the problem that the difficulty of separating the base paper and the polyurethane layer increases after the polyurethane composite layer is heated, and the separation knife can accurately cut into the connection between the base paper and the polyurethane layer, and as the composite layer is transmitted, the separation knife accurately separates the base paper and the polyurethane layer; second, gravity can be used to stably transmit the base paper to the winding roller, and through the cooperation of the pressure roller and the winding roller, the base paper is pressed on the surface of the winding roller so that the base paper is tightly wound, avoiding the base paper from slipping on the winding roller, thereby improving the winding efficiency.

[0028] Example 1 This embodiment provides a device for producing polyurethane material, which is installed on a frame a and arranged behind a drying device, as shown in the attached Figure 1 ~Attached Figure 3 As shown, it includes a first transmission component 1, a first single-layer separation component 2, a return component 3, a second single-layer separation component 4, and a second transmission component 5 in sequence; the return component 3 is used to turn and transmit the polyurethane composite layer b transmitted by the first transmission component 1 to the second transmission component 5, and make the polyurethane composite layer b transmitted by the first transmission component 1 and the second transmission component 5 be transported in parallel in opposite directions; the first single-layer separation component 2 and the second single-layer separation component 4 are respectively arranged at the lower ends of the polyurethane composite layer b in two transmission directions, and are respectively used to separate the two layers of base paper c on both sides of the polyurethane composite layer b; the first single-layer separation component 2 and the second single-layer separation component 4 have the same structure, and both include a separation knife 41, a pressure roller 42 and a winding roller 43 located at the lower side of the separation knife 41 and located at both sides of the single layer of the base paper c, and a fan 44 used to blow the base paper c to the connection between the pressure roller 42 and the winding roller 43.

[0029] In this embodiment, the pressure roller 42 includes a pressure roller body 421, two first mounting plates 422 arranged on both sides of the pressure roller body 421 and connected to the frame body a, two mounting strip holes 423 respectively arranged on the two first mounting plates 422, a rotating rod 424 arranged on the pressure roller body 421 and connected to the two mounting strip holes 423 at both ends, a supporting spring 425 arranged on the bottom surface of the mounting strip hole 423 close to the frame body a and connected to the rotating rod 424, and a first limit bearing arranged on the rotating rod 424 and located at the side end of the first mounting plate 422.

[0030] Among them, the first mounting plate 422 is preferably vertically mounted on the frame a, the mounting strip hole 423 is a long strip channel and passes through the two side surfaces of the first mounting plate 422, the two ends of the rotating rod 424 are inserted into the two mounting strip holes 423 and protrude from the side walls of the two first mounting plates 422, the first limit bearing is used to effectively fix the end of the rotating rod 424 in the mounting strip hole 423, and the pressure roller body 421 is rotatably mounted on the rotating rod 424. It is worth noting that the length of the installation strip hole 423 is greater than the diameter of the rotating rod 424. Therefore, after the rotating rod 424 is fixed at the front and rear ends by the first limit bearing, the rotating rod 424 can drive the pressure roller body 421 to move along the length direction of the installation strip hole 423, and the support spring 425 is used to support the rotating rod 424 to ensure that the pressure roller body 421 is in the initial state. The rotating rod 424 is close to the side wall of the installation strip hole 423 away from the support spring 425, so as to ensure that the pressure roller body 421 is close to the winding roller 43 and the pressing effect of the pressure roller on the winding roller 43. As the base paper is gradually wound on the winding roller 43, the thickness of the winding roller 43 increases, so that the force of the rotating rod 424 on the support spring 425 becomes larger, thereby further compressing the support spring 425, and finally causing the pressure roller body 421 to move in the direction away from the winding roller 43 until a new balance is reached. This arrangement not only ensures the pressing effect of the pressure roller on the winding roller, but also ensures that the pressure between the pressure roller and the winding roller is maintained within a reasonable range, thereby improving the winding effect of the base paper.

[0031] In this embodiment, the separation knife 41 includes two extension rods 411 respectively connected to the two ends of the rotating rod 424, a first fixed plate 412 arranged between the ends of the two extension rods 411 away from the rotating rod 424, and a knife body 413 arranged on the first fixed plate 412 and facing the polyurethane composite layer b. Among them, the extension rod 411 is preferably perpendicular to the first mounting plate 422, and the extension rod 411 extends toward the lower surface of the composite layer. The two extension rods 411 are arranged at the two side ends of the pressure roller 42 and are fixedly connected to the rotating rod 424. Therefore, when the rotating rod 424 moves in the mounting strip hole 423, it can also drive the two extension rods 411 to move synchronously, thereby evacuating the separation knife 41 from the composite layer as a whole. This corresponds to the state in which the composite layer can be continuously separated from the base paper by the pulling force after the composite layer is separated from the base paper; the length of the first fixed plate 412 and the knife body 413 is greater than or equal to the length of the pressure roller 42, and the knife body 413 is oriented away from the transmission direction of the composite layer to ensure that the knife body 413 completely covers the composite layer and separates the composite layer.

[0032] In this embodiment, the winding roller 43 includes a winding roller body 431, two second mounting plates 432 arranged on both sides of the winding roller body 431 and connected to the frame a, a rotating shaft 433 arranged on the winding roller body 431 and respectively rotatably connected to the two second mounting plates 432, and a second limit bearing arranged on the rotating shaft 433 and located at the side end of the second mounting plate 432.

[0033] In this embodiment, the fan 44 includes two fixing rings 441 respectively connected to the ends of the rotating rod 424, two mounting rods 442 arranged on the two fixing rings 441, a second fixing plate 443 arranged between the ends of the two mounting rods 442 away from the fixing rings 441, and a fan body 444 arranged on the second fixing plate 443. Among them, the mounting rod 442 is preferably perpendicular to the first mounting plate 422, and the mounting rod 442 extends toward the lower surface of the composite layer, but the length does not exceed the extension rod 411, the length of the second fixing plate 443 is greater than or equal to the length of the pressure roller 42, and the shape of the wind nozzle of the fan body 444 is also long strip (it can directly refer to the existing structure, so it will not be repeated), so as to ensure that the wind outlet of the wind nozzle can cover the entire winding roller, and ensure that the base paper is blown onto the winding roller by wind force.

[0034] Example 2 This embodiment further optimizes the structure of the pressure roller 42 on the basis of the embodiment 1. Figure 3 As shown, the details are as follows: In this embodiment, the pressure roller 42 also includes a sliding plate 427 arranged on the side end of the rotating rod 424 located in the mounting strip hole 423 and connected to the support spring 425, a threaded hole 428 arranged on the sliding plate 427, a positioning hole arranged on the first mounting plate 422, connected to the mounting strip hole 423 and matching the threaded hole 428, and a positioning bolt passing through the positioning hole and connected to the threaded hole 428.

[0035] The working principle of this embodiment is as follows: in the initial winding stage, the positioning bolt passes through the positioning hole and is screwed to the threaded hole 428, so that the positioning bolt locks the sliding plate 427, so that the position of the pressure roller 42 in the mounting strip hole 423 is locked, thereby ensuring the pressing effect of the pressure roller on the winding roller in the initial winding stage; after the base paper is wrapped around the winding roller for several turns, the positioning bolt can be removed to start the pressure adjustment effect of the pressure roller on the winding roller.

[0036] Example 3 This embodiment optimizes the structure based on the embodiment 1 or the embodiment 2, in order to improve the winding effect of the winding roller on the base paper. Figure 2 and attached Figure 4 As shown, the specific structure is as follows: The winding roller body 431 includes a roller body 431a, a roller cover 431b detachably connected to the roller body 431a, an annular tube 431c arranged in the roller cover 431b, a channel 431d arranged on the surface of the roller cover 431b away from the roller body 431a, and a liquid outlet nozzle 431e arranged on the outer peripheral side of the annular tube 431c and connected to the channel 431d.

[0037] The roller sleeve 431b can be connected to the roller body 431a through a bolt structure or a snap-fit ​​structure. The roller sleeve 431b has a cavity inside, and the annular tube 431c is fixed on the bottom wall of the inner cavity close to the roller body 431a. The channel 431d connects the inner cavity with the outer side of the roller sleeve 431b, and one end of the liquid outlet nozzle 431e is connected to the annular tube 431c, and the other end passes through the channel 431d; the annular tube 431c also has a liquid inlet and a liquid outlet, the liquid inlet is used to inject glue into the tube, and the liquid outlet is used to discharge excess glue. The purpose of this arrangement is to output glue to the surface of the roller body 431a quantitatively through the liquid outlet nozzle 431e, so that the surface of the roller body has stickiness. After the winding roller winds up the base paper, the base paper in contact with the roller surface can be adhered to the roller body to prevent the smooth base paper from slipping on the roller body. In addition, the operation of the fan 44 can also promote the rapid solidification of the glue, so that the base paper will not slip on the roller body.

[0038] Furthermore, the winding roller body 431 further includes at least two elastic protrusions 431f disposed on the inner side wall of the channel 431d near the liquid outlet 431e and arranged opposite to each other to close the channel 431d, and a groove 431g disposed on the outer surface of the roller body 431a near the channel 431d and connected to the channel 431d; the pressing roller 42 further includes a pressing protrusion 426 disposed on the outer peripheral side of the pressing roller body 421 and used to press the elastic protrusion 431f. The two elastic protrusions 431f are preferably made of materials such as rubber or hydrogel. In the absence of external force, the elastic protrusions abut against each other, thereby sealing the glue liquid in the channel. The pressing protrusion 426 can be inserted into the channel to press the elastic protrusion. When the elastic protrusion is pressed, the channel is opened, and then the glue liquid flows out to the groove 431g and further spreads, achieving the effect of adhering the winding paper. It is understandable that the extrusion protrusion 426 will also adhere to a certain amount of glue, so a cleaning block or other structure that fits the surface of the pressure roller can be set on the frame a to wipe the glue on the extrusion protrusion to prevent the pressure roller from sticking to the base paper. As the base paper is rolled up, the thickness of the winding roller increases and the pressure roller retreats, which can make the extrusion protrusion away from the elastic protrusion. Therefore, after the base paper is rolled up a few times, the glue will no longer be released, which meets actual needs and is highly practical.

[0039] Example 4 This embodiment optimizes the structure based on the embodiment 1, embodiment 2 or embodiment 3. Figure 3 As shown, the details are as follows: The fan 44 also includes a start plate 445 disposed on the side end of the fixing ring 441 away from the mounting rod 442, an ear plate 446 mounted on the frame body a, and a screw 447 screwed on the ear plate 446 and acting on the start plate 445; the extension direction of the screw 447 is parallel to the distribution direction of the mounting strip holes 423. The purpose of such arrangement is that when the pressure roller moves in the direction away from the winding roller, the screw 447 first contacts the start plate 445, and then acts on the start plate 445 to push the fixing ring 441 to rotate, and finally the fan body 444 rotates, so that the wind nozzle rotates from facing the winding roller to facing the composite layer, and the wind blown out of the wind nozzle is preferably hot wind, which promotes the flatness of the surface of the composite layer, so that the fan has a dual purpose.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An apparatus for producing polyurethane material, mounted on a frame (a) and arranged behind a drying device, characterized in that: It comprises, in sequence, a first transmission component (1), a first single-layer separation component (2), a return component (3), a second single-layer separation component (4), and a second transmission component (5); The return component (3) is used to redirect and transfer the polyurethane composite layer (b) transferred by the first transfer component (1) to the second transfer component (5), and to enable the polyurethane composite layer (b) transferred by the first transfer component (1) and the second transfer component (5) to be transported in parallel in opposite directions; The first single-layer separation component (2) and the second single-layer separation component (4) are respectively arranged at the lower ends of the polyurethane composite layer (b) in two transmission directions, and are respectively used to separate the two layers of base paper (c) on both sides of the polyurethane composite layer (b); The first single-layer separation component (2) and the second single-layer separation component (4) have the same structure, and both comprise a separation knife (41), a pressure roller (42) and a winding roller (43) located below the separation knife (41) and on both sides of the single-layer base paper (c), and a fan (44) for blowing the base paper (c) toward the connection between the pressure roller (42) and the winding roller (43).

2. The device for producing polyurethane material according to claim 1, characterized in that: The pressure roller (42) comprises a pressure roller body (421), two first mounting plates (422) arranged on both sides of the pressure roller body (421) and connected to the frame (a), two mounting strip holes (423) respectively arranged on the two first mounting plates (422), a rotating rod (424) arranged on the pressure roller body (421) and connected to the two mounting strip holes (423) at both ends, a supporting spring (425) arranged on the bottom surface of the mounting strip hole (423) close to the frame (a) and connected to the rotating rod (424), and a first limit bearing arranged on the rotating rod (424) and located at the side end of the first mounting plate (422).

3. The device for producing polyurethane material according to claim 2, characterized in that: The winding roller (43) comprises a winding roller body (431), two second mounting plates (432) arranged on both sides of the winding roller body (431) and connected to the frame (a), a rotating shaft (433) arranged on the winding roller body (431) and rotatably connected to the two second mounting plates (432), and a second limit bearing arranged on the rotating shaft (433) and located at the side end of the second mounting plate (432).

4. The device for producing polyurethane material according to claim 3, characterized in that: The winding roller body (431) comprises a roller body (431a), a roller sleeve (431b) detachably connected to the roller body (431a), an annular tube (431c) arranged in the roller sleeve (431b), a hole (431d) arranged on the surface of the roller sleeve (431b) away from the roller body (431a), and a liquid outlet nozzle (431e) arranged on the outer peripheral side of the annular tube (431c) and connected to the hole (431d).

5. The device for producing polyurethane material according to claim 4, characterized in that: The winding roller body (431) further includes at least two elastic protrusions (431f) arranged on the inner side wall of the channel (431d) close to the liquid outlet nozzle (431e) and arranged opposite to each other to close the channel (431d); the pressing roller (42) further includes an extrusion protrusion (426) arranged on the outer peripheral side of the pressing roller body (421) and used to squeeze the elastic protrusion (431f).

6. The device for producing polyurethane material according to claim 5, characterized in that: The winding roller body (431) further comprises a groove (431g) which is arranged on the outer surface of the roller body (431a) close to the hole (431d) and is connected to the hole (431d).

7. The device for producing polyurethane material according to claim 2, characterized in that: The separation knife (41) comprises two extension rods (411) respectively connected to two ends of the rotating rod (424), a first fixing plate (412) arranged between the ends of the two extension rods (411) away from the rotating rod (424), and a knife body (413) arranged on the first fixing plate (412) and facing the polyurethane composite layer (b).

8. The device for producing polyurethane material according to claim 2, characterized in that: The fan (44) comprises two fixing rings (441) respectively rotatably connected to the ends of the rotating rod (424), two mounting rods (442) arranged on the two fixing rings (441), a second fixing plate (443) arranged between the ends of the two mounting rods (442) away from the fixing rings (441), and a fan body (444) arranged on the second fixing plate (443).

9. The device for producing polyurethane material according to claim 8, characterized in that: The fan (44) further comprises a start plate (445) arranged on the side end of the fixing ring (441) away from the mounting rod (442), an ear plate (446) mounted on the frame (a), and a screw rod (447) screwed on the ear plate (446) and acting on the start plate (445); the extension direction of the screw rod (447) is parallel to the distribution direction of the mounting strip holes (423).

10. The device for producing polyurethane material according to claim 2, characterized in that: The pressure roller (42) further includes a sliding plate (427) arranged on the side end of the rotating rod (424) located in the mounting strip hole (423) and connected to the support spring (425), a threaded hole (428) arranged on the sliding plate (427), a positioning hole arranged on the first mounting plate (422), connected to the mounting strip hole (423) and matched with the threaded hole (428), and a positioning bolt passing through the positioning hole and connected to the threaded hole (428).

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