A continuous forming device and forming method for a PU lifting belt

Abstract

The present invention discloses a continuous forming device and forming method for a PU lifting belt, including a forming conveyor. A core layer unwinder is provided at the starting end of the forming conveyor, and the core layer belt on the core layer unwinder is continuously formed by the traction of the forming conveyor. A PU casting machine is provided on one side of the forming conveyor. The PU casting machine stirs, mixes and degasses the raw materials of the PU rubber compound, and then metering pumps them into two feeding pipes. The two feeding pipes are respectively responsible for casting the surface rubber compounds on the upper and lower layers of the core layer belt. Along the forming direction of the forming conveyor, a tension separator and a stretching and shaping machine are successively arranged. The stretching and shaping machine pre-stretches the formed PU lifting belt to prevent the PU lifting belt from becoming longer and longer during actual use. The tension separator is arranged between the forming conveyor and the stretching and shaping machine, and forms a pulling force on the formed PU lifting belt by using the rotational speed difference, and ensures that the pulling force received is always in a dynamic balance state.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting belt manufacturing, and particularly relates to a continuous forming device and forming method for a PU lifting belt. Background Art

[0002] The lifting belt is one of the important components of a grain elevator. Commonly used lifting belts on the market include rubber lifting belts, PVC lifting belts, and PU lifting belts, etc. The PU lifting belt is formed by compounding an upper and a lower surface rubber layer and a core layer, as Figure 1 shown.

[0003] The traditional PU lifting belt is produced and formed in a mold with a fixed length. After each mold is produced and insulated for a specified process time, the belt body is pulled forward by a distance equal to the length of one mold, and then production is carried out again. In this way, the production of the entire lifting belt is completed "mold by mold".

[0004] The traditional forming method has the following defects:

[0005] 1. The "mold by mold" forming mode results in joints between the front and rear molds, affecting the product appearance and surface quality.

[0006] 2. According to the needs of users, the length of the PU lifting belt is generally relatively long. The "mold by mold" forming mode will cause many joints on the entire product. Since the joints of each mold are not cured simultaneously, there must be a large difference in strength.

[0007] 3. After the PU rubber material enters the mold, it needs to be insulated for a process cycle to be completely cured and formed. The "mold by mold" forming mode must wait for the product of the "previous mold" to be formed before the casting of the product of the "next mold" can be carried out, resulting in low production efficiency. Summary of the Invention

[0008] To solve the above problems, the purpose of the present invention is to provide a continuous forming device and forming method for a PU lifting belt, and the forming device can continuously form PU lifting belt products.

[0009] To solve the above technical problems, the present invention provides a continuous forming device for a PU lifting belt, including a forming conveyor,

[0010] A core layer unwinder is provided at the starting end of the forming conveyor, and the core layer belt on the core layer unwinder is continuously formed by being pulled by the forming conveyor;

[0011] A PU casting machine is provided on one side of the forming conveyor. The PU casting machine stirs, mixes, and degasses the raw materials of the PU rubber material, and then metering pumps them into two feeding pipes. The two feeding pipes are respectively responsible for casting the upper and lower surface rubber materials of the core layer belt;

[0012] Along the forming direction of the forming conveyor, a tension separator and a stretching and shaping machine are successively arranged;

[0013] The stretching and shaping machine pre-stretches the formed PU lifting belt to prevent the PU lifting belt from becoming longer and longer during actual use;

[0014] The tension separator is arranged between the forming conveyor and the stretching and shaping machine, and forms a pulling force on the formed PU lifting belt by using the rotational speed difference, and ensures that the received pulling force is always in a dynamic balance state.

[0015] Preferably, the core layer unwinder unfolds the coiled core layer belt body and continuously forms it under the traction power of the forming conveyor;

[0016] The central shaft of the core layer unwinder adopts a damping shaft. After inserting the damping shaft into the center of the core layer coil, compressed air is introduced to make it expand and fix the core layer coil;

[0017] One end of the damping shaft is equipped with a brake, and the brake cooperates with the damping shaft to provide damping for the unwound core layer coil.

[0018] Preferably, the forming conveyor includes a conveyor belt, a side baffle assembly, and a lower layer rubber thickness control roller;

[0019] The core layer belt body is conveyed forward under the traction of the conveyor belt, and the side baffle assembly is located above the conveyor belt and moves synchronously with the conveyor belt;

[0020] The lower layer rubber thickness control roller is located above the lower layer rubber pouring position, and the thickness of the lower layer rubber of the PU lifting belt is controlled by adjusting the distance between the lower layer rubber thickness control roller and the conveyor belt.

[0021] Preferably, the forming conveyor further includes a heating device, and the heating device is used to heat the conveyor belt to keep it at a set temperature all the time.

[0022] Preferably, the side baffle assembly includes two groups, which are symmetrically distributed on both sides of the conveyor belt, so as to abut against the two side walls of the PU lifting belt;

[0023] The side baffle assembly includes an annular baffle strip and a plurality of pressing wheels supporting the annular baffle strip. The annular baffle strip is pressed on the upper surface of the conveyor belt through the pressing wheels and moves synchronously with the conveyor belt; the two groups of annular baffle strips and the conveyor belt form a movable forming cavity, and the PU lifting belt is continuously formed in this forming cavity.

[0024] Preferably, the PU casting machine includes a machine body, an upper layer rubber material feeding pipe, and a lower layer rubber material feeding pipe. The upper layer rubber material feeding pipe casts the upper layer rubber material of the core layer belt body, while the lower layer rubber material feeding pipe casts the lower layer rubber material of the core layer belt body;

[0025] The upper layer rubber material feeding pipe and the lower layer rubber material feeding pipe are respectively fixed on the upper layer feeding swing servo module and the lower layer feeding swing servo module. The upper layer feeding swing servo module and the lower layer feeding swing servo module swing left and right synchronously, driving the upper layer rubber material feeding pipe and the lower layer rubber material feeding pipe to feed while swinging.

[0026] Preferably, the tension cut-off machine includes a tension cut-off machine frame. Five first rubber-coated rollers distributed alternately and a first pressing roller are arranged in the tension cut-off machine frame;

[0027] One ends of the five first rubber-coated rollers are connected in sequence through five first transmission gears, and one of the first rubber-coated rollers is equipped with a first servo motor. The five first rubber-coated rollers are driven to rotate synchronously by the first servo motor;

[0028] The end of the first pressing roller is equipped with a first hydraulic cylinder. Under the action of the first hydraulic cylinder, the first pressing roller presses the PU lifting belt against the first rubber-coated roller opposite to it, so as to increase the normal pressure received by the PU lifting belt, thereby increasing the friction between the PU lifting belt and the roller, so as to play a role in cutting off the tension.

[0029] Preferably, the stretching and shaping machine includes a stretching and shaping machine frame. Three second rubber-coated rollers distributed alternately, a tension detection roller, and a second pressing roller are arranged in the stretching and shaping machine frame;

[0030] One ends of the three second rubber-coated rollers are connected in sequence through three second transmission gears, and one of the second rubber-coated rollers is equipped with a second servo motor. The three second rubber-coated rollers are driven to rotate synchronously by the second servo motor;

[0031] Tension sensors are arranged at both ends of the tension detection roller. The tension received by the PU lifting belt in the stretching and shaping machine is detected by the tension sensors;

[0032] The end of the second pressing roller is equipped with a second hydraulic cylinder. Under the action of the second hydraulic cylinder, the second pressing roller presses the PU lifting belt against the second rubber-coated roller opposite to it, so as to increase the normal pressure received by the PU lifting belt, thereby increasing the friction between the PU lifting belt and the roller, so as to play a role in cutting off the tension.

[0033] Preferably, there is a rotational speed difference between the first servo motor and the second servo motor. This rotational speed difference forms a tensile force on the PU lifting belt. After the value of this tensile force is fed back into the production line control system, the control system adjusts the rotational speed difference between the two servo motors to ensure that the tensile force received by the PU lifting belt is always in dynamic equilibrium.

[0034] The present invention also provides a method for forming a PU lifting belt using a continuous forming device, which includes the following steps:

[0035] Step A: First, the core layer belt body on the core layer unwinder is conveyed forward under the traction of the forming conveyor.

[0036] Step B: At the same time, the PU casting machine stirs, mixes, and degasses the raw materials of the PU rubber compound, and then metering pumps them into the upper layer rubber compound feeding pipe and the lower layer rubber compound feeding pipe. The two feeding pipes are respectively responsible for casting the surface rubber compounds on the upper and lower surfaces of the core layer belt body. And the upper feeding swing servo module and the lower feeding swing servo module swing left and right synchronously, respectively driving the upper layer rubber compound feeding pipe and the lower layer rubber compound feeding pipe to feed while swinging.

[0037] Step C: Then, the PU lifting belt is continuously formed in the movable forming cavity formed by the two groups of annular retaining strips and the conveyor belt.

[0038] Step D: After being formed, the PU lifting belt first passes through a tension separator for tension separation and then enters a stretching and shaping machine. Using the rotational speed difference between the first servo motor and the second servo motor, a tensile force is formed on the PU lifting belt. After the value of this tensile force is fed back into the production line control system, the control system adjusts the rotational speed difference between the two servo motors to ensure that the tensile force received by the PU lifting belt is always in dynamic equilibrium.

[0039] Step E: The PU lifting belt after pre-stretching is wound up to become a lifting belt product.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] 1. This PU lifting belt continuous forming device can continuously form a PU lifting belt, and after forming, use a tension separator and a stretching and shaping machine to form a tensile force on the PU lifting belt, thereby pre-stretching the PU lifting belt to prevent the PU lifting belt from becoming longer and longer during actual use.

[0042] 2. The PU lifting belt formed by the PU lifting belt continuous forming device of the present invention has no splicing joints, and the product length is not limited; and this forming method has no waiting period for curing and forming, and the production efficiency is higher. Description of the Drawings

[0043] Figure 1 It is a structural schematic diagram of the PU lifting belt;

[0044] Figure 2 It is a schematic structural view of a continuous forming device for a PU lifting belt provided by the present invention;

[0045] Figure 3 It is a front view of a continuous forming device for a PU lifting belt provided by the present invention;

[0046] Figure 4 It is a schematic structural view of a core layer unwinder provided by the present invention;

[0047] Figure 5 It is a schematic structural view of a forming conveyor provided by the present invention;

[0048] Figure 6 It is a top view of a forming conveyor provided by the present invention;

[0049] Figure 7 It is a schematic structural view of a PU casting machine provided by the present invention;

[0050] Figure 8 It is a schematic structural view of a tension partition machine from the first perspective provided by the present invention;

[0051] Figure 9 It is a schematic structural view of a tension partition machine from the second perspective provided by the present invention;

[0052] Figure 10 It is a schematic structural view of a stretching and shaping machine from the first perspective provided by the present invention;

[0053] Figure 11 It is a schematic structural view of a stretching and shaping machine from the second perspective provided by the present invention.

[0054] In the figure: 1. Forming conveyor; 101. Conveyor belt; 102. Side edge guard assembly; 103. Lower layer rubber thickness control roller;

[0055] 2. Core layer unwinder; 201. Damping shaft; 202. Core layer roll; 203. Brake;

[0056] 3. PU casting machine; 301. Machine body; 302. Upper layer rubber material feeding pipe; 303. Lower layer rubber material feeding pipe; 304. Upper layer feeding swing servo module; 305. Lower layer feeding swing servo module;

[0057] 4. Tension partition machine; 401. Tension partition machine frame; 402. First rubber-coated roller; 403. First pressing roller; 404. First transmission gear; 405. First servo motor; 406. First hydraulic cylinder;

[0058] 5. Stretching and shaping machine; 501. Stretching and shaping machine frame; 502. Second rubber-coated roller; 503. Tension detection roller; 504. Second pressing roller; 505. Second driving gear; 506. Second servo motor; 507. Tension sensor; 508. Second hydraulic cylinder. Detailed implementation manners

[0059] The following further detailed description of the present invention is made in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be more clearly understood. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0061] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0062] In addition, the features, operations, and characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Similarly, the steps or actions described in the method can also be adjusted in the order that can be easily seen by those skilled in the art. Therefore, the various orders in the specification and the drawings are only for clearly describing a certain embodiment, rather than the order that must be followed, unless it is stated that a certain order must be followed.

[0063] Embodiment 1

[0064] The present invention provides a continuous forming device for a PU lifting belt. Please refer to Figure 2 and Figure 3 , which includes a forming conveyor 1. A core layer unwinder 2 is provided at the starting end of the forming conveyor 1, and the core layer belt on the core layer unwinder 2 is continuously formed by the traction of the forming conveyor 1. A PU casting machine 3 is provided on one side of the forming conveyor 1. The PU casting machine 3 stirs, mixes and degasses the raw materials of the PU rubber compound, and then pumps it into two metering pipes through a metering pump. The two metering pipes are respectively responsible for casting the surface rubber compounds on the upper and lower layers of the core layer belt.

[0065] Along the forming direction of the forming conveyor 1, a tension separator 4 and a stretching and shaping machine 5 are successively arranged. The stretching and shaping machine 5 pre-stretches the formed PU lifting belt to prevent the PU lifting belt from becoming longer and longer during actual use. The tension separator 4 is arranged between the forming conveyor 1 and the stretching and shaping machine 5, and uses the speed difference to form a pulling force on the formed PU lifting belt, and ensures that the pulling force received is always in a dynamic balance state.

[0066] Specifically, as Figure 4 shown, the core layer unwinder 2 unfolds the coiled core layer belt and continuously forms it under the traction power of the forming conveyor 1. The rotational inertia of the core layer roll itself will cause the core layer to become slack. To ensure that the core layer always remains in a tensioned state throughout the forming process, the central shaft of the core layer unwinder 2 adopts a damping shaft 201. After inserting the damping shaft 201 into the center of the core layer roll 202, compressed air is introduced to expand and fix the core layer roll 202. A brake 203 is installed at one end of the damping shaft 201, and the brake 203 cooperates with the damping shaft 201 to provide damping for the unwound core layer roll 202.

[0067] Specifically, as Figure 5 and Figure 6 shown, the forming conveyor 1 includes a conveyor belt 101, a side edge guard assembly 102 and a lower layer rubber thickness control roller 103. The core layer belt is conveyed forward under the traction of the conveyor belt 101, and the side edge guard assembly 102 is located above the conveyor belt 101 and moves synchronously with the conveyor belt 101. The lower layer rubber thickness control roller 103 is located above the lower layer rubber casting position, and the thickness of the lower layer rubber of the PU lifting belt is controlled by adjusting the distance between the lower layer rubber thickness control roller 103 and the conveyor belt 101.

[0068] Furthermore, the forming conveyor 1 further includes a heating device, and the heating device is used to heat the conveyor belt 101 to keep it at a set temperature all the time.

[0069] Therefore, the conveyor belt 101 of the present invention uses a silicone belt or other conveyor belts with heat-resistant properties. After being heated to a set temperature by the heating device, it is easy to demold the PU lifting belt.

[0070] In some embodiments, the heating device is a plurality of heating tubes arranged side by side, and each heating tube extends along the length direction of the conveyor belt 101, so that the surface of the conveyor belt 101 in contact with the PU lifting belt is heated to the set temperature, which is easy to demold.

[0071] Furthermore, the side edge guard assembly 102 includes two groups, symmetrically distributed on both sides of the conveyor belt 101, so as to abut against both side walls of the PU lifting belt; the side edge guard assembly 102 includes an annular retaining strip and a plurality of pressing wheels supporting the annular retaining strip. The annular retaining strip is pressed on the upper surface of the conveyor belt 101 through the pressing wheels and moves synchronously with the conveyor belt 101; the two annular retaining strips and the conveyor belt 101 form a movable molding cavity, and the PU lifting belt is continuously molded in this molding cavity.

[0072] One side of the lower rubber layer thickness control roller 103 is provided with a screw rod lifting assembly, and the height of the lower rubber layer thickness control roller 103 is adjusted through this screw rod lifting assembly, that is, the distance between the lower rubber layer thickness control roller 103 and the conveyor belt 101, so as to control the thickness of the lower rubber layer of the PU lifting belt.

[0073] Specifically, as Figure 7 shown, the PU casting machine 3 includes a machine body 301, an upper rubber layer feeding pipe 302 and a lower rubber layer feeding pipe 303. The upper rubber layer feeding pipe 302 casts the upper surface rubber layer of the core layer belt body, while the lower rubber layer feeding pipe 303 casts the lower surface rubber layer of the core layer belt body; the upper rubber layer feeding pipe 302 and the lower rubber layer feeding pipe 303 are respectively fixed on the upper feeding swing servo module 304 and the lower feeding swing servo module 305. The upper feeding swing servo module 304 and the lower feeding swing servo module 305 swing left and right synchronously, driving the upper rubber layer feeding pipe 302 and the lower rubber layer feeding pipe 303 to feed while swinging. The swinging speed and swinging distance can both be set according to process parameters, which is convenient for manufacturing PU lifting belts with different width specifications.

[0074] Specifically, as Figure 8 and Figure 9 shown, the tension cutting machine 4 includes a tension cutting machine frame 401, and five first rubber-coated rollers 402 distributed alternately and a first pressing roller 403 are arranged in the tension cutting machine frame 401.

[0075] The same ends of the five first rubber-coated rollers 402 are sequentially connected by five first transmission gears 404, and one of the first rubber-coated rollers 402 is configured with a first servo motor 405, and the five first rubber-coated rollers 402 are driven to rotate synchronously by the first servo motor 405.

[0076] A first hydraulic cylinder 406 is arranged at the end of the first pressing roller 403. Under the action of the first hydraulic cylinder 406, the first pressing roller 403 presses the PU lifting belt against the first rubber-coated roller 402 opposite thereto, so as to increase the normal pressure received by the PU lifting belt, thereby increasing the friction force between the PU lifting belt and the roller, so as to play a role in cutting off the tension.

[0077] Specifically, as Figure 10 and Figure 11 shown, the stretching and shaping machine 5 includes a stretching and shaping machine frame 501, and three second rubber-coated rollers 502, a tension detection roller 503 and a second pressing roller 504 which are arranged in a staggered manner are arranged in the stretching and shaping machine frame 501.

[0078] The same ends of the three second rubber-coated rollers 502 are sequentially connected by three second transmission gears 505, and one of the second rubber-coated rollers 502 is configured with a second servo motor 506, and the three second rubber-coated rollers 502 are driven to rotate synchronously by the second servo motor 506.

[0079] Tension sensors 507 are arranged at both ends of the tension detection roller 503, and the tension received by the PU lifting belt in the stretching and shaping machine 5 is detected by the tension sensors 507.

[0080] A second hydraulic cylinder 508 is arranged at the end of the second pressing roller 504. Under the action of the second hydraulic cylinder 508, the second pressing roller 504 presses the PU lifting belt against the second rubber-coated roller 504 opposite thereto, so as to increase the normal pressure received by the PU lifting belt, thereby increasing the friction force between the PU lifting belt and the roller, so as to play a role in cutting off the tension.

[0081] There is a rotational speed difference between the first servo motor 405 and the second servo motor 506, and this rotational speed difference forms a tension on the PU lifting belt. After the tension value is fed back into the production line control system, the control system adjusts the rotational speed difference between the two servo motors to ensure that the tension received by the PU lifting belt is always in dynamic balance.

[0082] Embodiment 2

[0083] The present invention also provides a method for forming a PU lifting belt by using a continuous forming device, which is characterized by including the following steps:

[0084] Step A: First, the core layer belt on the core layer unwinder 2 is conveyed forward under the traction of the forming conveyor 1;

[0085] Step B: Meanwhile, the PU casting machine 3 stirs, mixes and degasses the raw materials of the PU rubber compound, and then metering pumps them into the upper layer rubber compound feeding pipe 302 and the lower layer rubber compound feeding pipe 303. The two feeding pipes are respectively responsible for casting the surface rubber compounds on the upper and lower surfaces of the core layer belt. And the upper feeding swing servo module 304 and the lower feeding swing servo module 305 swing left and right synchronously, respectively driving the upper layer rubber compound feeding pipe 302 and the lower layer rubber compound feeding pipe 303 to feed while swinging;

[0086] Step C: Then the PU lifting belt is continuously formed in the movable forming cavity formed by the two sets of annular retaining strips and the conveyor belt 101;

[0087] Step D: After being formed, the PU lifting belt first passes through the tension separator 4 for tension separation and then enters the stretching and shaping machine 5. Using the rotational speed difference between the first servo motor 405 and the second servo motor 506, a tensile force is formed on the PU lifting belt. After the value of this tensile force is fed back into the production line control system, the control system adjusts the rotational speed difference of the two servo motors to ensure that the tensile force received by the PU lifting belt is always in dynamic balance;

[0088] Step E: The PU lifting belt after pre-stretching is wound up to become the lifting belt product.

[0089] This PU lifting belt continuous forming equipment can continuously form the PU lifting belt, and after forming, use the tension separator and the stretching and shaping machine to form a tensile force on the PU lifting belt, so as to pre-stretch the PU lifting belt to avoid the PU lifting belt becoming longer and longer during actual use. The PU lifting belt formed by the PU lifting belt continuous forming equipment of the present invention has no splicing joints, and the product length is not limited; and this forming method has no waiting period for curing and forming, and the production efficiency is higher.

[0090] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the field of the present invention according to the above disclosure shall fall within the protection scope of the claims.

Claims

1. A PU lifting belt continuous forming equipment, characterized in that: comprising a forming conveyor (1), A core layer unwinding machine (2) is provided at the starting end of the forming conveyor (1), and the core layer belt body on the core layer unwinding machine (2) is continuously formed by pulling the forming conveyor (1); A PU pouring machine (3) is provided on one side of the molding conveyor (1), and the PU pouring machine (3) stirs, mixes and degasses the raw materials of the PU rubber material, and then pumps the raw materials into two discharge pipes in a metered manner, and the two discharge pipes are respectively responsible for pouring the rubber material on the upper and lower surfaces of the core layer belt body; A tension isolating machine (4) and a stretching setting machine (5) are sequentially arranged along the forming direction of the forming conveyor (1); The stretching and shaping machine (5) pre-stretches the PU lifting belt after forming, so as to prevent the PU lifting belt from becoming longer and longer during actual use; The tension isolating machine (4) is arranged between the forming conveyor (1) and the stretching and setting machine (5), and utilizes the rotation speed difference to form a tensile force on the PU lifting belt after the forming is completed, and ensures that the tensile force is always in a dynamic equilibrium state; The tension isolating machine (4) comprises a tension isolating machine frame (401), in which five staggered first rubber-coated rollers (402) and a first pressing roller (403) are arranged; the same end of the five first rubber-coated rollers (402) is connected in sequence via five first transmission gears (404), and one of the first rubber-coated rollers (402) is provided with a first servo motor (405), and the five first rubber-coated rollers (402) are driven to rotate synchronously via the first servo motor (405); the end of the first pressing roller (403) is provided with a first hydraulic cylinder (406), and under the action of the first hydraulic cylinder (406), the first pressing roller (403) presses the PU lifting belt against the first rubber-coated roller (402) opposite thereto, so as to increase the positive pressure on the PU lifting belt, thereby increasing the friction between the PU lifting belt and the roller, so as to play a role in isolating the tension; The PU pouring machine (3) comprises a machine body (301), an upper rubber material discharge pipe (302) and a lower rubber material discharge pipe (303), wherein the upper rubber material discharge pipe (302) is used to pour the rubber material on the upper surface of the core layer belt body, and the lower rubber material discharge pipe (303) is used to pour the rubber material on the lower surface of the core layer belt body; The upper layer rubber material discharge pipe (302) and the lower layer rubber material discharge pipe (303) are respectively fixed on the upper layer material discharge swing servo module (304) and the lower layer material discharge swing servo module (305); the upper layer material discharge swing servo module (304) and the lower layer material discharge swing servo module (305) swing synchronously left and right, driving the upper layer rubber material discharge pipe (302) and the lower layer rubber material discharge pipe (303) to discharge materials while swinging.

2. A PU lifting belt continuous forming device as claimed in claim 1, characterized in that: The core layer unwinding machine (2) unwinds the rolled core layer strip body and continuously shapes it under the traction power of the forming conveyor (1); The central axis of the core layer unwinding machine (2) is a damping shaft (201), and after the damping shaft (201) is inserted into the center of the core layer roll (202), compressed air is introduced to expand the damping shaft (201) to fix the core layer roll (202); A brake (203) is installed at one end of the damping shaft (201), and the brake (203) cooperates with the damping shaft (201) to provide damping for the unwinding core layer roll (202).

3. A PU lifting belt continuous forming device as claimed in claim 1, characterized in that: The forming conveyor (1) comprises a conveyor belt (101), a side guard assembly (102) and a lower layer rubber material thickness control roller (103); The core layer belt body is conveyed forward under the traction of the conveyor belt (101), while the side guard assembly (102) is located above the conveyor belt (101) and moves synchronously with the conveyor belt (101); The lower rubber layer thickness control roller (103) is located above the lower rubber layer pouring position, and the thickness of the lower rubber layer of the PU lifting belt is controlled by adjusting the distance between the lower rubber layer thickness control roller (103) and the conveyor belt (101).

4. A PU lifting belt continuous forming device as claimed in claim 3, characterized in that: The forming conveyor (1) further comprises a heating device, wherein the heating device is used to heat the conveyor belt (101) so that the conveyor belt (101) always maintains a set temperature.

5. A PU lifting belt continuous forming device as claimed in claim 3, characterized in that: The side guard assembly (102) comprises two groups, which are symmetrically distributed on both sides of the conveyor belt (101), so as to abut against the two side walls of the PU lifting belt; The side guard assembly (102) comprises an annular guard bar and a plurality of pressure wheels supporting the annular guard bar, the annular guard bar being pressed onto the upper surface of the conveyor belt (101) by the pressure wheels and being moved synchronously with the conveyor belt (101); two groups of the annular guard bars and the conveyor belt (101) form a movable molding cavity, and the PU lifting belt is continuously molded in the molding cavity.

6. A PU lifting belt continuous forming device as claimed in claim 1, characterized in that: The stretching and shaping machine (5) comprises a stretching and shaping machine frame (501), in which three staggered second rubber-coated rollers (502), a tension detection roller (503) and a second pressing roller (504) are arranged; The same end of the three second rubber-coated rollers (502) is connected in sequence via three second transmission gears (505), and one of the second rubber-coated rollers (502) is provided with a second servo motor (506), and the three second rubber-coated rollers (502) are driven to rotate synchronously via the second servo motor (506); Tension sensors (507) are provided at both ends of the tension detection roller (503), and the tension applied to the PU lifting belt in the stretching and setting machine (5) is detected by the tension sensors (507); The end of the second pressing roller (504) is provided with a second hydraulic cylinder (508). Under the action of the second hydraulic cylinder (508), the second pressing roller (504) presses the PU lifting belt against the second rubber-coated roller opposite to it, so as to increase the positive pressure on the PU lifting belt, thereby increasing the friction between the PU lifting belt and the roller, so as to play a role in isolating the tension.

7. A PU lifting belt continuous forming device as claimed in claim 6, characterized in that: There is a speed difference between the first servo motor (405) and the second servo motor (506), and this speed difference generates tension on the PU lifting belt. After the tension value is fed back to the production line control system, the control system adjusts the speed difference between the two servo motors to ensure that the tension on the PU lifting belt is always in dynamic balance.

8. A method for forming a PU lifting belt using the continuous forming equipment according to any one of claims 1 to 7, characterized in that: The steps include: Step A: First, the core layer belt body on the core layer unwinding machine (2) is transported forward under the traction of the forming conveyor (1); Step B: At the same time, the PU pouring machine (3) stirs, mixes and degasses the raw materials of the PU rubber material, and then pumps the raw materials into the upper rubber material discharge pipe (302) and the lower rubber material discharge pipe (303). The two discharge pipes are responsible for pouring the rubber materials of the upper and lower layers of the core layer belt body respectively, and the upper material discharge swing servo module (304) and the lower material discharge swing servo module (305) swing left and right synchronously, respectively driving the upper rubber material discharge pipe (302) and the lower rubber material discharge pipe (303) to discharge the materials while swinging; Step C: Then the PU lifting belt is continuously formed in a movable forming cavity formed by two sets of annular baffles and the conveyor belt (101); Step D: The formed PU lifting belt first passes through the tension isolating machine (4) for tension isolating and then enters the stretching and shaping machine (5). The speed difference between the first servo motor (405) and the second servo motor (506) is used to form tension on the PU lifting belt. After the tension value is fed back to the production line control system, the control system adjusts the speed difference between the two servo motors to ensure that the tension on the PU lifting belt is always in dynamic balance. Step E: After pre-stretching, the PU lifting belt is rolled up to become a lifting belt product.

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