Coating roller structure for PVC sheet production

Abstract

The invention relates to the technical field of coating rollers, in particular to a coating roller structure for PVC (polyvinyl chloride) sheet production, which comprises a roller body, sealing plates are inserted into two ends of the roller body, a shaft handle is fixed at one end, away from the roller body, of each sealing plate, a shaft body of the roller body is sleeved with a roller surface sleeve, mounting rings are fixedly inserted into two ends of the roller surface sleeve, and reserved grooves are formed in two ends of the roller body. A plurality of inserting handles are inserted into the outer ring surface of the reserved groove, one end of each inserting handle penetrates through the outer wall of the roller body and then is inserted into the inner ring surface of the mounting ring, a guide-in handle is inserted into the reserved groove, the guide-in handle blocks the inserting handles from retreating in the reserved groove, a storage groove is formed in one end of the sealing plate, and a flexible protective cover is fixedly arranged in the storage groove in a sleeved mode. The flexible protective cover wraps the roller surface sleeve after being turned outwards; the roller has the advantages that the sealing plates seal the two ends of the tubular roller body, and the dead weight of the whole roller body is reduced; the guide-in ring is matched to limit the installation of the roller surface pipe; meanwhile, the storage of the flexible protective cover is integrated; therefore, the sealing plate has multiple purposes and abundant functions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coating rollers, in particular to a coating roller structure for PVC sheet production. BACKGROUND

[0002] In the production process of PVC sheet, the coating roller is one of the key equipment, and its performance directly affects the quality and production efficiency of PVC sheet. However, the traditional coating roller structure has many problems: the traditional coating roller adopts a solid structure, which results in a large overall weight. During operation, the large weight increases the load of the driving device, thereby consuming more energy and increasing production costs. The roller surface is the part that directly contacts the PVC sheet and is prone to wear. When the roller surface is severely worn, the entire coating roller needs to be replaced, which not only increases the replacement cost but also wastes a lot of time and affects the production schedule. Moreover, the traditional structure is complex to operate when replacing the roller surface, and professional technical personnel are required to operate, further increasing the difficulty and cost of replacement. When the coating roller is removed from the equipment for storage, the roller surface is easily eroded by the external environment, such as dust and moisture, resulting in rust and corrosion of the roller surface and shortening the service life of the coating roller.

[0003] Therefore, it is necessary to propose a coating roller structure for PVC sheet production that reduces the self-weight of the roller body, reduces energy consumption, facilitates replacement of the roller surface, and protects the coating roller during storage. SUMMARY

[0004] The present application aims to provide a coating roller structure for PVC sheet production to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a coating roller structure for PVC sheet production, comprising a roller body, both ends of the roller body are inserted with an end plate, the end of the end plate away from the roller body is fixed with a shaft handle, a roller surface sleeve is sleeved on the shaft body of the roller body, both ends of the roller surface sleeve are inserted and fixed with a mounting ring, both ends of the roller body are provided with a reserved slot, a plurality of insertion handles are inserted on the outer ring surface of the reserved slot, one end of the insertion handle penetrates through the outer wall of the roller body and is then inserted into the inner ring surface of the mounting ring, a lead-in handle is inserted into the inside of the reserved slot, the lead-in handle blocks the retraction of the insertion handle in the reserved slot, one end of the end plate is provided with a receiving slot, a flexible protective cover is fixedly sleeved in the inside of the receiving slot, and the flexible protective cover is wrapped around the roller surface sleeve after being turned outward.

[0006] Preferably, the roller body is in a circular tube structure, and a plurality of reinforcing rings are fixed on the inner wall of the roller body.

[0007] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0008] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0009] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0010] Preferably, the other end of the handle is provided with an inclined surface, and the inclined surface faces the slot opening of the reserved groove.

[0011] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0012] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0013] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0014] Preferably, the two ends of the roller body are provided with splicing grooves one, the sealing plate is a convex circular plate, the other end of the sealing plate is inserted into the pipe opening of the roller body, one end of the sealing plate is provided with a side groove on the outer ring surface, the side groove is an annular groove, a plurality of through holes one are formed on the surface of the side groove, a screw rod one is inserted into the through hole one, one end of the screw rod one is fixed on the surface of the side groove, the other end of the screw rod one is sleeved with a nut one, after the nut one and the screw rod one are locked, the sealing plate is fixed in the splicing groove one.

[0015] Compared with the prior art, the present application has the following advantages: The coating roller structure for PVC sheet production provided by the application sets the roller body as a tubular structure, which greatly reduces the weight of the whole coating roller compared with the traditional solid structure. In the running process, the load of the driving device is reduced, thereby reducing the energy consumption to a certain extent and saving the production cost.

[0016] The roller surface sleeve and the mounting ring constitute a detachable structure. When the roller surface sleeve is seriously worn, the tubular body constituted by the roller surface sleeve and the mounting ring is only needed to be removed from the roller body, and a new set is replaced. The whole coating roller does not need to be replaced, which greatly reduces the replacement cost. Through the cooperation of the lead-in handle, the insertion handle and the elastic rubber belt, the quick installation and disassembly of the roller surface sleeve are realized. The operation is simple and convenient, and professional technicians are not needed, which saves the replacement time and improves the production efficiency.

[0017] The receiving groove is arranged at one end of the sealing plate, and the fixed flexible protective cover is sleeved in the receiving groove. When the roller body is removed from the equipment for storage, the flexible protective cover is pulled out of the receiving groove, unfolded and wrapped around the roller surface sleeve. The two groups of flexible protective covers jointly act to avoid the corrosion of the roller surface sleeve during storage, thereby prolonging the service life of the coating roller.

[0018] That is, the sealing plate not only realizes the sealing of the two ends of the tubular roller body to reduce the self-weight of the whole roller body, but also realizes the limiting of the installation of the roller surface pipe in cooperation with the lead-in ring, and integrates the receiving of the flexible protective cover. That is, the sealing plate has multiple uses and rich functions. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the application; Figure 2 It is a structural side view of the application; Figure 3 It is Figure 2 It is a structural cross-sectional view of A-A in the middle; Figure 4 It is Figure 3 It is an enlarged schematic view of the structure at A; Figure 5 It is Figure 3 It is an enlarged schematic view of the structure at B; Figure 6 It is Figure 4 It is an enlarged schematic view of the structure at C; Figure 7 It is Figure 3 It is a structural schematic view of the flexible protective cover received in the receiving groove; Figure 8 It is Figure 7 It is an enlarged schematic view of the structure at D; Figure 9 It is a structural schematic view of the connection between the sealing plate and the shaft handle of the application; Figure 10 It is a structural schematic view of the insertion handle of the application; Figure 11 Fig. 1 is a schematic diagram of the handle structure introduced in the application.

[0020] In the figure: roller body 1, splice groove one 2, sealing plate 3, reinforcing ring 4, shaft handle 5, edge groove 6, perforation one 7, screw rod one 8, nut one 9, roller surface sleeve 10, mounting ring 11, reserved groove 12, perforation two 13, insertion handle 14, clamping groove 15, missing groove 16, elastic rubber belt 17, introduction handle 18, sliding groove 19, connecting block 20, perforation three 21, screw rod two 22, nut two 23, alignment seam 24, storage groove 25, flexible protective cover 26, rubber ring 27, heat dissipation hole 28, rubber sealing ring 29. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme of the application clear, complete description, and the advantages are more clear and obvious, the following will be further described in detail with the help of the attached drawings. It should be understood that the specific embodiments described here are part of the embodiments of the application, not all the embodiments, only to explain the embodiments of the application, and not for the purpose of limiting the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0022] Example one, please refer to Figures 1-11 The application provides a technical scheme: a coating roller structure for PVC sheet production, comprising a roller body 1, the roller body 1 is in the form of a circular tube, a plurality of reinforcing rings 4 are fixed to the inner wall of the roller body 1, sealing plates 3 are inserted into both ends of the roller body 1, shaft handles 5 are fixed to the ends of the sealing plates 3 away from the roller body 1, splice grooves one 2 are formed in both ends of the roller body 1, the sealing plates 3 are in the form of a "convex" circular plate, the other end of the sealing plate 3 is inserted into the pipe opening of the roller body 1, an edge groove 6 is formed in the outer ring surface of one end of the sealing plate 3, the edge groove 6 is in the form of a ring groove, a plurality of perforations one 7 are formed in the surface of the edge groove 6, screw rods one 8 are inserted into the perforations one 7, one end of the screw rod one 8 is fixed to the surface of the edge groove 6, nuts one 9 are screwed onto the other end of the screw rod one 8, after the nuts one 9 and the screw rod one 8 are locked, the sealing plate 3 is fixed in the splice groove one 2; the surfaces of the shaft handle 5 and the sealing plate 3 are provided with heat dissipation holes 28. In use, a plurality of reinforcing rings 4 are fixed to the inner ring surface of the roller body 1, the addition of the reinforcing rings 4 improves the pressure resistance of the roller body 1, the roller body 1 is designed in the form of a tube in order to reduce the weight of the entire coating roller, which reduces the energy consumption of the operation of the coating roller to a certain extent; after the two sealing plates 3 are inserted into the two pipe openings of the roller body 1, the screw rod one 8 penetrates through the corresponding perforation one 7, and the nut one 9 is screwed onto the corresponding screw rod one 8 and locked, so that the sealing plate 3 is firmly fixed to the end of the roller body 1, the pipe opening of the roller body 1 is sealed, and the pressure resistance of the pipe opening of the roller body 1 is improved. Heat dissipation holes 28 can be optionally formed in the surfaces of the shaft handle 5 and the sealing plate 3, which dissipate the heat collected in the inner cavity of the roller body 1.

[0023] The roller body 1 is sleeved with a roller surface sleeve 10, and mounting rings 11 are fixedly connected to both ends of the roller surface sleeve 10. The two ends of the roller surface sleeve 10 are provided with lead-in grooves in the inner ring surface, and the lead-in grooves are annular grooves. The mounting rings 11 are "convex" annular plates, one end of the mounting ring 11 is inserted into the lead-in groove and fixedly connected to the lead-in groove, the maximum outer ring diameter of the mounting ring 11 is smaller than the outer ring diameter of the roller surface sleeve 10, and the maximum distance between the two mounting rings 11 is equal to the length of the roller body 1. In use, the tube body formed by the roller surface sleeve 10 and the mounting rings 11 is a detachable structure, that is, when the roller surface sleeve 10 is seriously worn, the tube body formed by the roller surface sleeve 10 and the mounting rings 11 can be removed from the roller body 1, and a new set of roller surface sleeve 10 and mounting rings 11 can be installed on the roller body 1. The mounting rings 11 are added to protect the two ends of the roller surface sleeve 10 and facilitate cooperation with the connecting structure provided on the roller body 1 to fix the roller surface sleeve 10 on the roller body 1.

[0024] The two ends of the roller body 1 are provided with reserved slots 12, the outer ring surface of the reserved slots 12 is inserted with a plurality of insertion handles 14, one end of the insertion handle 14 penetrates the outer wall of the roller body 1 and is inserted into the inner ring surface of the mounting ring 11, the inside of the reserved slot 12 is inserted with a lead-in handle 18, the lead-in handle 18 blocks the retreat of the insertion handle 14 in the reserved slot 12, the reserved slot 12 is a circular ring slot, a plurality of through holes two 13 are formed on the outer ring surface of the reserved slot 12, the insertion handle 14 and the through hole two 13 correspond one by one, the insertion handle 14 is inserted into the through hole two 13, and the length of the plate of the insertion handle 14 is greater than the depth of the through hole two 13, the one end of the insertion handle 14 is provided with a missing slot 16 on both sides, the one end of the insertion handle 14 is fixed with an elastic rubber belt 17, the two ends of the elastic rubber belt 17 are fixed on the two parallel distributed side walls of the through hole two 13, a plurality of clamping grooves 15 are formed on the inner ring surface of the mounting ring 11, the clamping groove 15 and the insertion handle 14 correspond one by one, when the lead-in handle 18 pushes the insertion handle 14, the insertion handle 14 stretches and deforms the elastic rubber belt 17, and pushes the deformed elastic rubber belt 17 into the clamping groove 15; the other end of the insertion handle 14 is provided with an inclined surface, the inclined surface faces the slot of the reserved slot 12, the inner ring surface of the mounting ring 11 is fixed with a rubber sealing ring 29, after the mounting ring 11 is sleeved on the roller body 1, the rubber sealing ring 29 is clamped between the mounting ring 11 and the roller body 1. When the roller surface sleeve 10 and the mounting ring 11 form a pipe sleeve, the pipe sleeve is sleeved on the roller body 1, the mounting ring 11 is rotated as the center axis of the roller body 1, until the opposite position of the surface of the roller body 1 and the mounting ring 11, then the lead-in handle 18 is pushed into the reserved slot 12, during the pushing process, the lead-in handle 18 pushes the insertion handle 14 along the inclined surface, the insertion handle 14 slides along the through hole two 13 and stretches the elastic rubber belt 17, the elastic rubber belt 17 is squeezed into the clamping groove 15, at this time, the mounting ring 11 is inserted by the insertion handle 14, realizing the quick and effective fixing of the roller surface sleeve 10 sleeved on the roller body 1; when the lead-in handle 18 is separated from the reserved slot 12, the elastic rubber belt 17 rebounds and pulls the insertion handle 14 to move to the inside of the reserved slot 12, at this time, the insertion handle 14 is separated from the clamping groove 15, the connection between the mounting ring 11 and the roller body 1 is cancelled, the mounting ring 11 and the roller surface sleeve 10 can be separated from the roller body 1 and replaced.

[0025] The inner annular surface of the reserved groove 12 is provided with two sliding grooves 19, which are symmetrically distributed about the pipe orifice of the roller body 1. The inner part of the sliding groove 19 is slidably connected with a connecting block 20. One end of the connecting block 20 is fixed to the inner annular surface of the lead-in handle 18. The surface of the connecting block 20 is provided with a through hole three 21. The inner part of the through hole three 21 is inserted with a screw rod two 22. One end of the screw rod two 22 is fixed to the surface of the sliding groove 19. The length of the screw rod two 22 is greater than the width of the connecting block 20. The other end of the screw rod two 22 is sleeved with a nut two 23. The inner annular surface of the mounting ring 11 and the outer annular surface of the roller body 1 are both provided with a plurality of alignment slots 24. When the alignment slots 24 of the mounting ring 11 and the roller body 1 are opposite, the insertion handle 14 and the clamping groove 15 are opposite. In use, when the lead-in handle 18 is completely inserted into the reserved groove 12, the screw rod two 22 passes through the corresponding through hole three 21, and the nut two 23 is sleeved and screwed on the screw rod two 22, so as to fix the connecting block 20 in the sliding groove 19. The sliding groove 19 pulls the lead-in handle 18, so as to avoid the lead-in handle 18 from being separated from the connecting block 20, and to stably limit the insertion handle 14 by the lead-in handle 18.

[0026] One end of the sealing plate 3 is provided with a receiving groove 25. The inner part of the receiving groove 25 is fixedly sleeved with a flexible protective cover 26. The flexible protective cover 26 is wrapped around the roller surface sleeve 10 after being turned outwards. The receiving groove 25 is an annular groove. One end of the flexible protective cover 26 is fixedly provided with a rubber ring 27. After the two flexible protective covers 26 are turned outwards to wrap the roller surface sleeve 10, the two rubber rings 27 are misaligned. In use, when the roller body 1 is removed from the equipment for storage, the flexible protective cover 26 is pulled out of the receiving groove 25 and unfolded, and the flexible protective cover 26 is turned outwards to wrap the roller surface sleeve 10. Two groups of flexible protective covers 26 wrap the roller surface sleeve 10 together, so as to avoid the corrosion of the roller surface sleeve 10 during storage. When the roller body 1 needs to be installed, one end of the flexible protective cover 26 can be torn off from the receiving groove 25, and the flexible protective cover 26 can be turned inwards and inserted into the receiving groove 25 for storage. Embodiment two, on the basis of embodiment one, proposes a using method of a coating roller structure for PVC sheet production, which comprises the following steps: S1. Roller body inner reinforcing ring installation: a plurality of reinforcing rings 4 are uniformly fixed to the inner annular surface of the roller body 1 according to the design requirements. The addition of the reinforcing ring 4 can improve the pressure resistance of the roller body 1.

[0027] S2. Sealing plate installation: two sealing plates 3 are inserted into the two pipe orifices of the roller body 1 respectively, so that the "convex" shaped structure of the sealing plate 3 is matched with the splicing groove one 2 of the roller body 1. Ensure that the screw rod one 8 penetrates through the corresponding through hole one 7. Screw the nut one 9 on the corresponding screw rod one 8 and lock it tightly, so that the sealing plate 3 is fixed firmly at the end of the roller body 1, realizing the sealing of the pipe orifice of the roller body 1, and improving the pressure resistance of the pipe orifice of the roller body 1.

[0028] S3. The assembly of the roller cover and the mounting ring: one end of the mounting ring 11 is inserted into the guide groove at both ends of the roller cover 10 and fixed, the maximum outer ring diameter of the mounting ring 11 is smaller than the outer ring diameter of the roller cover 10, and the maximum distance between the two mounting rings 11 is equal to the pipe length of the roller body 1. The addition of the mounting ring 11 can protect the two ends of the roller cover 10, and facilitate the subsequent connection and fixation with the roller body 1.

[0029] S4. The installation of the roller cover to the roller body: the pipe body composed of the roller cover 10 and the mounting ring 11 is sleeved on the roller body 1. Turn the mounting ring 11 around the roller body 1 as the center axis until the opposite alignment slot 24 on the surface of the roller body 1 and the mounting ring 11. Push the guide handle 18 into the reserved groove 12, and during the pushing process, the guide handle 18 pushes the insertion handle 14 along the inclined surface at one end of the insertion handle 14, so that the insertion handle 14 slides along the through hole two 13. When the insertion handle 14 slides, the elastic rubber belt 17 is tensioned, and the elastic rubber belt 17 is squeezed into the clamping groove 15 on the inner ring surface of the mounting ring 11. At this time, the mounting ring 11 is inserted by the insertion handle 14, and the roller cover 10 is quickly and effectively fixed after being sleeved on the roller body 1. The inner ring surface of the mounting ring 11 is fixed with a rubber sealing ring 29, and after the mounting ring 11 is sleeved on the roller body 1, the rubber sealing ring 29 is clamped between the mounting ring 11 and the roller body 1, and plays a sealing role.

[0030] S5. The fixation of the guide handle: when the guide handle 18 is completely inserted into the reserved groove 12, ensure that the screw rod two 22 passes through the through hole three 21 on the surface of the connecting block 20 (one end of the connecting block 20 is fixed on the inner ring surface of the guide handle 18 and slides in the sliding groove 19 on the inner ring surface of the reserved groove 12). The nut two 23 is sleeved and screwed on the screw rod two 22, so as to fix the connecting block 20 in the sliding groove 19. The sliding groove 19 pulls the guide handle 18 to avoid the disconnection of the guide handle 18 from the connecting block 20, so that the guide handle 18 stably limits the insertion handle 14.

[0031] S6. Heat dissipation setting: according to actual needs, heat dissipation holes 28 can be selectively opened on the surface of the shaft handle 5 and the sealing plate 3, and the heat dissipation holes 28 can dissipate the heat collected in the inner cavity of the roller body 1.

[0032] S7. Maintenance and replacement during use: when the roller cover 10 needs to be replaced, first unscrew the nut two 23 from the screw rod two 22 to release the fixation of the guide handle 18. Pull out the guide handle 18 from the reserved groove 12, at this time the elastic rubber belt 17 rebounds to pull the insertion handle 14 to move to the inner side of the reserved groove 12, the insertion handle 14 is pulled out from the clamping groove 15, and the connection between the mounting ring 11 and the roller body 1 is cancelled. The mounting ring 11 can be pulled out together with the roller cover 10 from the roller body 1, and then a new set of roller cover 10 and mounting ring 11 can be replaced according to the above roller cover installation steps.

[0033] S8 flexible protective cover use: when the roller body 1 is removed from the device for storage, the flexible protective cover 26 is extracted from the storage slot 25 and unfolded, and the flexible protective cover 26 is wrapped outside the roll cover 10, and the two groups of flexible protective cover 26 wrap the roll cover 10 together, avoiding the corrosion of the roll cover 10 during storage. When the roller body 1 needs to be installed, one end of the flexible protective cover 26 can be torn off from the storage slot 25, or the flexible protective cover 26 can be inserted into the storage slot 25 for storage.

[0034] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that modifications, changes, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A coating roller structure for PVC sheet production, comprising a roller body (1), used for coating a functional layer on the PVC sheet, characterized in that: Both ends of the roller body (1) are plugged with a closing plate (3), and an end of the closing plate (3) away from the roller body (1) is fixed with a shaft handle (5). A roller surface sleeve (10) is sleeved on the shaft of the roller body (1), and mounting rings (11) are plugged and fixed at both ends of the roller surface sleeve (10). Both ends of the roller body (1) are provided with a reserved groove (12), and a plurality of insertion handles (14) are inserted into the outer ring surface of the reserved groove (12). One end of the insertion handle (14) passes through the outer wall of the roller body (1) and is inserted into the inner ring surface of the mounting ring (11). An introduction handle (18) is inserted into the inside of the reserved groove (12), and the introduction handle (18) blocks the insertion handle (14) from retreating in the reserved groove (12). One end of the closing plate (3) is provided with a receiving groove (25), and a flexible protective cover (26) is sleeved and fixed inside the receiving groove (25). The flexible protective cover (26) is turned outward and wraps around the roller surface sleeve (10).

2. The coating roller structure for PVC sheet production according to claim 1, characterized in that: The roller body (1) is in a circular tube structure, and a plurality of reinforcement rings (4) are fixed to the inner wall of the roller body (1).

3. The coating roller structure for PVC sheet production according to claim 1, characterized in that: Both ends of the roller body (1) are provided with a splicing groove (2), the sealing plate (3) is a convex circular plate, the other end of the sealing plate (3) is inserted into the pipe mouth of the roller body (1), one end of the sealing plate (3) is provided with a side groove (6) on the outer ring surface, the side groove (6) is an annular groove, a plurality of through holes (7) are provided on the surface of the side groove (6), a screw (8) is inserted into the inside of the through hole (7), one end of the screw (8) is fixed on the surface of the side groove (6), and the other end of the screw (8) is sleeved with a nut (9) threaded thereon, and after the nut (9) and the screw (8) are locked, the sealing plate (3) is fixed in the splicing groove (2).

4. The coating roller structure for PVC sheet production according to claim 1, characterized in that: Both ends of the roller cover (10) are provided with an introduction groove on the inner ring surface, the introduction groove being an annular groove, the mounting ring (11) being a "convex" shaped circular ring plate, one end of the mounting ring (11) being inserted into and fixed in the introduction groove, the maximum outer ring diameter of the mounting ring (11) being smaller than the outer ring diameter of the roller cover (10), and the maximum spacing between the two mounting rings (11) being equal to the tube length of the roller body (1).

5. The coating roller structure for PVC sheet production according to claim 1, characterized in that: The reserved groove (12) is an annular groove, and a plurality of through-holes (13) are provided on the outer ring surface of the reserved groove (12). The insertion handle (14) and the through-holes (13) correspond one to one. The insertion handle (14) is inserted into the through-holes (13), and the length of the insertion handle (14) is greater than the depth of the through-holes (13). One end of the insertion handle (14) is provided with notches (16) on both sides. An elastic rubber band (17) is fixed to one end of the insertion handle (14), and the two ends of the elastic rubber band (17) are fixed to two parallel side walls of the through-holes (13). The inner ring surface of the mounting ring (11) is provided with a plurality of card slots (15), and the card slots (15) and the insertion handle (14) correspond one to one. When the introduction handle (18) pushes the insertion handle (14), the insertion handle (14) stretches the elastic rubber band (17) to deform, and pushes the deformed elastic rubber band (17) into the card slot (15).

6. The coating roller structure for PVC sheet production according to claim 5, characterized in that: The other end of the inserting handle (14) is provided with an inclined surface, which faces the notch of the reserved groove (12).

7. The coating roller structure for PVC sheet production according to claim 1, characterized in that: The inner ring surface of the reserved groove (12) is provided with two slide grooves (19), and the two slide grooves (19) are symmetrically distributed with respect to the pipe mouth of the roller body (1). The inner sliding connection of the slide groove (19) is provided with a connecting block (20), one end of the connecting block (20) is fixed on the inner ring surface of the introduction handle (18), and the surface of the connecting block (20) is provided with a third through-hole (21), and the interior of the third through-hole (21) is plugged with a second screw (22), one end of the second screw (22) is fixed on the surface of the slide groove (19), the rod length of the second screw (22) is greater than the width of the connecting block (20), and the other end of the second screw (22) is provided with a second nut (23) threadedly connected.

8. The coating roller structure for PVC sheet production according to claim 5, characterized in that: The inner ring surface of the mounting ring (11) and the outer ring surface of the roller body (1) are both provided with a plurality of alignment slots (24). When the alignment slots (24) of the mounting ring (11) and the roller body (1) are opposite to each other, the insertion handle (14) and the clamping slot (15) are opposite to each other.

9. The coating roller structure for PVC sheet production according to claim 1, characterized in that: The receiving groove (25) is an annular groove, and a rubber ring (27) is fixed to one end of the flexible protective cover (26). After the two flexible protective covers (26) are turned outward to wrap the roller cover (10), the two rubber rings (27) are dislocated.

10. The coating roller structure for PVC sheet production according to claim 1, characterized in that: Heat dissipation holes (28) are provided on the surfaces of the shaft handle (5) and the sealing plate (3).

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