A flattening and feeding mechanism for film material used in PVC film processing

Abstract

The present invention relates to the technical field of PVC film conveying devices, and specifically provides a flattening and feeding mechanism for film materials used for PVC film processing, comprising a frame, wherein a first conveying roller and a second conveying roller are arranged on the frame, a support rod is arranged between the first conveying roller and the second conveying roller, one end of the support rod is connected to a first abutment plate, and the support rod is connected to a second abutment plate near a sliding position. When one side of the PVC film is cut, the other side can be subjected to an abutment force, thereby avoiding the situation where the film is easily deviated when a blade is only arranged on one side, and a blowing component is provided. The blowing force of the blowing component is negatively correlated with the opening of the PVC film. When the opening of the film is poor, the blowing force is automatically increased to stretch the film; when the opening is good, the blowing force is appropriately reduced, thereby effectively avoiding wrinkles on the outside of the film, improving the conveying quality of the film, and improving the applicability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of PVC film conveying devices, in particular to a flattening and conveying mechanism for film materials used for PVC film processing. Background Art

[0002] The film flattening and conveying mechanism is a device used to process film materials. Its main function is to ensure that the film remains flat during the conveying process, avoiding problems such as wrinkles and bubbles, thereby ensuring the quality and efficiency of subsequent processing.

[0003] After the film is blown out by the blown film injection molding machine, it needs to be broken and rewound to become a common sheet film. When breaking the edge, sometimes it is necessary to break the edge on one side. At this time, a pulling force will be applied to one end of the tubular film to keep the film taut and facilitate cutting. However, applying tension on one side will cause the film to deviate and the cutting accuracy to deteriorate. At the same time, when the tubular film is rewound, the two layers of film overlap and wrinkles are generated. For films with poor opening properties, it is difficult to separate the films, which is neither convenient for breaking the edge nor for flattening. Summary of the Invention

[0004] Based on this, it is necessary to provide a flattening and feeding mechanism for PVC film processing to address the problem that when the current tubular film is rolled up, if the opening is poor, it will make the film difficult to separate, inconvenient to break the edge and flatten and roll it up.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A flattening and feeding mechanism for film materials used in PVC film processing, comprising:

[0007] A frame, wherein a first conveying roller and a second conveying roller are rotatably provided on the frame and are parallel to each other and spaced apart, and a PVC film is wound around the first conveying roller and the second conveying roller;

[0008] A support rod, wherein the support rod is located between the first conveying roller and the second conveying roller, the axis of the support rod is parallel to the axis of the first conveying roller, one end of the support rod is axially slidably arranged on the frame, and a first abutment plate is fixedly arranged on the other end of the support rod, and the first abutment plate abuts one side of the PVC film, and a second abutment plate is axially slidably arranged at a position of the support rod away from the first abutment plate, and a blade is provided on the second abutment plate, and the blade cuts the other side of the PVC film;

[0009] The blowing component is used to blow air into the inside of the PVC film, and the blowing force of the blowing component is negatively correlated with the opening of the PVC film.

[0010] Furthermore, a guide block is fixedly connected to the frame, the support rod slides through the guide block, and a first elastic member is sleeved on the outer periphery of the support rod. The first elastic member pushes the first abutment plate and the second abutment plate away from each other to tension the PVC film.

[0011] Furthermore, the blowing assembly includes a blowing plate and a friction plate, the blowing plate is fixedly connected to the second abutment plate, a plurality of first blowing holes are provided on the second abutment plate, the blowing plate and the second abutment plate are hollow inside and are connected, the friction plate is vertically slidably arranged on the second abutment plate, the two surfaces of the friction plate are in friction contact with the inner wall of the PVC film respectively, the friction plate slides vertically to change the size of the channel connecting the blowing plate and the second abutment plate, and the size of the channel is negatively correlated with the opening of the PVC film.

[0012] Furthermore, an air flow channel is provided inside the air blowing plate, a stopper is provided in the air blowing plate for vertical sliding, an air flow hole is opened on the stopper, and the air flow hole is communicated with the air flow channel.

[0013] Furthermore, a transverse groove is provided in the blowing plate, one end of the blade is located in the transverse groove, the other end of the blade is hinged to the friction plate, the upper end surface of the stopper is a slope, the end of the blade located in the transverse groove is in sliding contact with the slope, and one end of the blade slides in the transverse groove to push the stopper to move vertically.

[0014] Furthermore, a second elastic member is provided between the stopper and the blow plate, and the second elastic member can push the stopper to move upward or make the stopper have a tendency to move upward.

[0015] Furthermore, the interior of the support rod is hollow, a plurality of second blowing holes are opened on the periphery of the support rod, and the interior of the support rod is communicated with the interior of the second abutting plate.

[0016] Furthermore, a third elastic member is provided between the friction plate and the second abutting plate, and the third elastic member enables the friction plate to reset or has a tendency to reset.

[0017] Furthermore, the outer circumference of the first conveyor roller and the second conveyor roller are both provided with a spiral groove, and the spiral groove has two sections. The two sections of the spiral groove are symmetrically arranged about the midpoint of the first conveyor roller and the second conveyor roller. The rotation directions of the two sections of the spiral groove are opposite. The two sections of the spiral groove flatten the PVC film.

[0018] Furthermore, a driving mechanism is provided on the frame, and the driving mechanism is used to drive the first conveying roller and the second conveying roller to rotate.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a first abutment plate and a second abutment plate. When one side of the PVC film is cut, the other side can be subjected to an abutment force, thereby avoiding the situation where the film is easily deflected when the blade is only provided on one side, ensuring the stability of the film during the cutting process, thereby improving the cutting accuracy. In addition, the blowing force of the blowing component is negatively correlated with the opening of the PVC film. When the opening of the film is poor, the blowing force is automatically increased to open the film; when the opening is good, the blowing force is appropriately reduced. This can ensure that the film is effectively opened and can be flexibly adjusted according to actual conditions, effectively avoiding wrinkles on the outside of the film, improving the conveying quality of the film, and improving the applicability of the device.

[0021] The present invention uses a blade as a connecting piece to push the stopper to move. During operation, the blade angle changes, thereby changing the contact position with the PVC film, avoiding excessive wear caused by the blade always cutting the film at a certain position, and extending the service life of the blade.

[0022] The present invention has two spiral grooves arranged on the outer periphery of the first conveyor roller and the second conveyor roller. When the first conveyor roller and the second conveyor roller rotate, the spiral grooves generate a force that pulls the film to move toward both ends, effectively flattening the PVC film, ensuring that the film remains flat during the conveying process, and providing good conditions for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a flattening and feeding mechanism for a PVC film processing material provided in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A perspective view of a PVC film of a flattening and feeding mechanism for PVC film processing provided in one embodiment;

[0025] Figure 3 for Figure 2 A partial enlarged view of part X of the flattening and feeding mechanism for PVC film processing provided in one embodiment;

[0026] Figure 4 for Figure 1 A left side view of a flattening and feeding mechanism for PVC film processing provided in one embodiment;

[0027] Figure 5 for Figure 4 A partial enlarged view of part Y of the flattening and feeding mechanism for PVC film processing provided in one embodiment;

[0028] Figure 6 for Figure 1A front view of a flattening and feeding mechanism for a PVC film material for processing provided in one embodiment;

[0029] Figure 7 for Figure 6 A cross-sectional view along AA of a flattening and feeding mechanism for PVC film processing provided in one embodiment;

[0030] Figure 8 for Figure 7 A partial enlarged view of the Z portion of the flattening and feeding mechanism for PVC film processing provided in one embodiment;

[0031] Figure 9 An exploded view of a flattening and feeding mechanism for PVC film processing provided by one embodiment of the present invention;

[0032] Figure 10 This is the state diagram of the PVC film without wrinkles on the outside;

[0033] Figure 11 This is a diagram showing the state where wrinkles appear on the outside of the PVC film.

[0034] in:

[0035] 100, frame; 110, first conveyor roller; 120, second conveyor roller; 130, spiral groove; 140, guide block; 150, limit rod; 160, locking ring; 170, threaded push rod; 180, first elastic member; 190, blade;

[0036] 200, first abutment plate; 210, second abutment plate; 211, first air blowing hole; 220, support rod; 221, second air blowing hole; 222, air inlet hole; 230, air blowing plate; 231, air flow channel; 232, transverse slide groove; 233, connecting pipe; 240, block; 241, air flow hole; 250, second elastic member; 260, friction plate; 270, third elastic member.

[0037] 300, PVC film. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] Refer to the following Figures 1-11 The following describes a flattening and feeding mechanism for PVC film processing provided by the present invention.

[0042] A flattening and conveying mechanism for film materials used in PVC film processing is suitable for flattening and conveying PVC films, comprising a frame 100, on which are provided a first conveying roller 110 and a second conveying roller 120 which are parallel to each other and spaced apart. The first conveying roller 110 is located above the second conveying roller 120, and a PVC film 300 is wound around each of the first conveying roller 110 and the second conveying roller 120. When the first conveying roller 110 and the second conveying roller 120 rotate, they can drive the PVC film 300 to move, thereby achieving the function of conveying the PVC film 300. A support rod 220 is provided between the first conveying roller 110 and the second conveying roller 120. The axis of the support rod 220 is parallel to the axis of the first conveying roller 110 and the second conveying roller 120. One end of the support rod 220 is slidably provided on the frame 100. The other end of the support rod 220 is suspended and a first abutting plate 200 is fixedly provided on the end. The first abutting plate 200 is provided vertically. The first abutting plate 200 abuts against one side of the PVC film 300 (the PVC film 300 is a cylindrical film. The cylindrical film is formed into a sheet after extrusion. One side of the film needs to be cut). 20 A second abutment plate 210 is slidingly set at a position away from the first abutment plate 200, that is, a second abutment plate 210 is slidingly set on one end of the sliding connection close to the support rod 220, and the second abutment plate 210 is also set vertically, and the second abutment plate 210 and the first abutment plate 200 are symmetrically set on the support rod 220. Different from the first abutment plate 200, a blade 190 is set on the second abutment plate 210, and the blade 190 is used to cut the other side of the PVC film 300. After one side of the PVC film 300 is cut, it continues to be transported through the second conveying roller 120.

[0043] The second abutment plate 210 is provided with an air blowing assembly, which can blow air into the inside of the PVC film 300, so that a part of the inside of the PVC film 300 is stretched open, making it easier for the blade 190 to cut the PVC film 300, and the stretched part can unfold the PVC film 300 that is not in contact with the first conveying roller 110 and the second conveying roller 120 to prevent wrinkles. It can be understood that since only one surface of the PVC film 300 is in contact with the first conveying roller 110 and the second conveying roller 120 during the process of being conveyed by the first conveying roller 110 and the second conveying roller 120, the other surface located on the outside cannot contact with the first conveying roller 110 and the second conveying roller 120, so after the air is filled in the inside of the PVC film 300, the PVC film 300 located on the outside can be stretched open to prevent wrinkles from occurring in the PVC film 300 on the outside. For example, the state when wrinkles occur on the outside is as shown in FIG. Figure 11 As shown, the state when no wrinkles are generated is as follows Figure 10 shown.

[0044] It should be noted that the blowing force of the blowing assembly in the present invention is negatively correlated with the opening property of the PVC film 300 (the opening property refers to the degree of adhesion between the inner and outer layers of the PVC film 300). That is to say, when the opening property of the PVC film 300 is poor, it means that the degree of adhesion between the inner and outer layers of the PVC film 300 is large, and it is difficult to stretch the inner and outer layers of the PVC film 300. Therefore, the blowing force of the blowing assembly needs to be increased so that the inner and outer PVC films 300 can be stretched open; similarly, when the opening property of the PVC film 300 is good, it means that the degree of adhesion between the inner and outer layers of the PVC film 300 is small, and it is easier to stretch the inner and outer layers of the PVC film 300. Therefore, the blowing force of the blowing assembly can be appropriately weakened. After weakening the blowing force of the blowing assembly, the inner and outer PVC films 300 can still be stretched open.

[0045] By providing the first abutment plate 200 and the second abutment plate 210, when one side of the PVC film 300 is cut, the other side can also be subjected to the abutment force, thereby avoiding the situation where the PVC film 300 is easily deflected when the blade 190 is only provided on one side. In addition, by providing the blowing assembly, the PVC film 300 can be partially stretched, so that the blade 190 can better cut the PVC film 300. The provision of the blowing assembly can also prevent the outer PVC film 300 from wrinkling, thereby improving the conveying quality of the PVC film 300 and ensuring smooth conveying of the PVC film 300.

[0046] Specifically, a guide block 140 is fixedly provided on the frame 100 of this embodiment. The guide block 140 is fixed to the frame 100 through two fixing rods on the frame 100. A sliding hole is opened on the guide block 140, and the support rod 220 is slidably provided in the guide block 140 through the sliding hole. The guide block 140 plays a guiding role to prevent the support rod 220 from tilting. A first elastic member 180 is sleeved on the outer periphery of the support rod 220. The first elastic member 180 is a tension spring. One end of the first elastic member 180 pulls the second abutment plate 210. A locking ring 160 is provided on the other end of the first elastic member 180. The locking ring 160 can fix one end of the first elastic member 180 on the support rod 220. One end of 220 is suspended, and a first abutment plate 200 is fixed on the suspended end. To adapt to PVC films 300 of different widths, one end of the first elastic member 180 pulls the second abutment plate 210, and the other end of the first elastic member 180 is fixed to the support rod 220 through the locking ring 160, and the first abutment plate 200 is fixed to the support rod 220, so it is equivalent to one end of the first elastic member 180 pulling the first abutment plate 200. At this time, the pulling force of the first elastic member 180 can make the first abutment plate 200 and the second abutment plate 210 tend to move away from each other, so that the PVC film 300 can be tensioned, making it easier for the blade 190 on the second abutment plate 210 to cut one side of the PVC film 300.

[0047] It should be noted that the setting of the locking ring 160 can adjust the force of the first elastic member 180 to tighten the PVC film 300. When the locking ring 160 is loosened, the operator can adjust the position of the locking ring 160 according to actual needs, and lock the locking ring 160 after the adjustment is completed. Figure 5 As shown, when the force for tensioning the PVC film 300 needs to be increased, the locking ring 160 can be moved rightward on the support rod 220 , and when the force for tensioning the PVC film 300 needs to be reduced, the locking ring 160 can be moved leftward on the support rod 220 .

[0048] The locking ring 160 in this embodiment is provided with a threaded push rod 170, which is spirally connected to the side wall of the locking ring 160. When the locking ring 160 needs to be moved, the threaded push rod 170 is rotated to loosen the pressure of the threaded push rod 170 on the support rod 220. When the locking ring 160 needs to be fixed, the threaded push rod 170 is rotated in the opposite direction so that the threaded push rod 170 presses the support rod 220 tightly.

[0049] More specifically, Figure 3 、 Figure 7 and Figure 8As shown, the blowing assembly in this embodiment includes a blowing plate 230 and a friction plate 260. The blowing plate 230 is fixedly connected to the second abutting plate 210. The second abutting plate 210 is provided with a plurality of first blowing holes 211. The blowing plate 230 and the second abutting plate 210 are both hollow inside, and the blowing plate 230 and the second abutting plate 210 are connected. A connecting pipe 233 is provided on the blowing plate 230. The connecting pipe 233 is used to connect to an air pump (not shown in the figure). When the air pump is working, it inflates the blowing plate 230. The gas can be blown out through the first blowing holes 211 on the second abutting plate 210, thereby filling the interior of the PVC film 300 with gas. The friction plate 260 is vertically slidably disposed on the second abutting plate 210. The two surfaces of the friction plate 260 are in frictional contact with the inner wall of the PVC film 300. When the first conveying roller 110 and the second conveying roller 120 convey the PVC film 300, the PVC film 300 located between the first conveying roller 110 and the second conveying roller 120 moves downward. The inner wall of the PVC film 300 rubs against the two surfaces of the friction plate 260, thereby driving the friction plate 260 to move in the vertical direction, and vertically downward. When the friction plate 260 moves vertically downward, it can change the size of the channel connecting the blowing plate 230 and the second abutting plate 210. The size of the channel is negatively correlated with the openness of the PVC film 300. That is, the worse the openness of the PVC film 300, the larger the size of the channel, and the better the openness of the PVC film 300, the smaller the size of the channel. Specifically, the further the friction plate 260 moves downward, the larger the size of the channel connecting the blowing plate 230 and the second abutting plate 210.

[0050] It should be noted that when the PVC film 300 moves downward and drives the friction plate 260 to move downward, the worse the opening of the PVC film 300 is, the greater the degree of adhesion between the inner and outer layers of the PVC film 300 is, and the greater the friction force of the inner wall of the PVC film 300 on the two surfaces of the friction plate 260 is, thereby driving the friction plate 260 to move downward farther. At this time, the channel size between the blowing plate 230 and the second abutting plate 210 is larger, so that more gas passes through the channel, which increases the blowing force of the first blowing hole 211 on the second abutting plate 210. Air force; when the PVC film 300 moves downward and drives the friction plate 260 to move downward, the better the opening of the PVC film 300, the smaller the degree of adhesion between the inner and outer layers of the PVC film 300, and the smaller the friction force of the inner wall of the PVC film 300 on the two surfaces of the friction plate 260, thereby driving the friction plate 260 to move downward. The smaller the channel size between the blowing plate 230 and the second abutting plate 210 is, the less gas passes through the channel, and the blowing force of the first blowing hole 211 on the second abutting plate 210 is weakened.

[0051] In a further embodiment, in order to realize the function of vertical movement of the friction plate 260 to change the size of the channel, as shown in FIG. Figure 8 As shown, an air flow channel 231 is provided in the blow plate 230, and a stopper 240 is vertically slidably provided in the blow plate 230. An air flow hole 241 is provided on the stopper 240. The air flow hole 241 is connected to the air flow channel 231. When the air flow hole 241 and the air flow channel 231 have an overlapping portion, gas can be allowed to pass through. Therefore, the overlapping portion of the air flow hole 241 and the air flow channel 231 constitutes the above-mentioned channel. When the stopper 240 slides in the vertical direction, the size of the overlapping portion of the air flow hole 241 and the air flow channel 231 can be changed, thereby changing the size of the channel.

[0052] Specifically, such as Figure 8 As shown, a transverse slot 232 is provided in the blowing plate 230, and one end of the blade 190 is slidably provided in the transverse slot 232. The other end of the blade 190 is hinged to the friction plate 260. Therefore, when the friction plate 260 moves in the vertical direction, it can drive one end of the blade 190 to slide in the transverse slot 232. The initial state is as shown in FIG. Figure 8 As shown, one end of the blade 190 is located at the leftmost side of the transverse groove 232. When the friction plate 260 moves downward, it can push one end of the blade 190 to slide from left to right in the transverse groove 232. The upper end surface of the stopper 240 in this embodiment is a slope. When one end of the blade 190 slides from left to right in the transverse groove 232, one end of the blade 190 simultaneously slides in contact with the slope of the upper end surface of the stopper 240. The height of the left side of the slope is lower than that of the right side. Therefore, one end of the blade 190 can push the stopper 240 to move downward, thereby increasing the overlapping portion of the air flow hole 241 on the stopper 240 and the air flow channel 231, thereby increasing the size of the channel, so that more air is blown out from the first blowing hole 211.

[0053] To facilitate the resetting of the stopper 240, a second elastic member 250 is provided between the stopper 240 and the blow plate 230. The second elastic member 250 is a compression spring. One end of the second elastic member 250 is fixedly connected to the bottom of the stopper 240, and the other end of the second elastic member 250 is fixedly connected to the inside of the blow plate 230. The second elastic member 250 can cause the stopper 240 to move upward or cause the stopper 240 to have a tendency to move upward.

[0054] It should be noted that the present invention uses a blade 190 as a connecting piece to push the block 240 to move, so that the angle of the blade 190 can be changed. When the angle of the blade 190 changes, the contact position of the blade 190 and the PVC film 300 can be changed, thereby avoiding the blade 190 always cutting the PVC film 300 at a certain position, resulting in increased wear of the blade 190. If the contact position of the blade 190 and the PVC film 300 is continuously changed, the increase in wear of the blade 190 can be avoided, thereby extending the service life of the blade 190.

[0055] In a further embodiment, to increase the effect of blowing, as Figure 3 and Figure 8 As shown, the present invention sets the support rod 220 as an internal hollow structure, and a plurality of second blowing holes 221 are opened on the support rod 220, and an air inlet hole 222 is provided at the sliding connection between the support rod 220 and the second abutment plate 210. The interior of the second abutment plate 210 is connected to the interior of the support rod 220 through the air inlet hole 222. This setting can enable the support rod 220 to also blow air into the interior of the PVC film 300, thereby further improving the blowing effect.

[0056] It should be noted that if Figure 3 and Figure 5 As shown, the present invention is provided with a limit rod 150 on the frame 100, and the limit rod 150 passes through the guide block 140 and approaches the blowing plate 230, so that the sliding distance of the second abutment plate 210 on the support rod 220 is limited. Therefore, the air inlet hole 222 on the support rod 220 is opened within the sliding range of the second abutment plate 210 on the support rod 220, preventing the air inlet hole 222 from detaching from the second abutment plate 210.

[0057] Specifically, the first abutment plate 200 in the embodiment of the present invention is also hollow inside, and a plurality of first blowing holes 211 are also provided on the first abutment plate 200. The first abutment plate 200 is connected to the interior of the support rod 220, so that the first abutment plate 200 blows out gas through the first blowing holes 211, thereby further improving the blowing effect.

[0058] In a further embodiment, in order to enable the friction plate 260 to adapt to PVC films 300 with various openings, it is necessary to enable the friction plate 260 to move upward to reset. Therefore, a third elastic member 270 is provided between the friction plate 260 and the second abutment plate 210. The third elastic member 270 is also a compression spring. One end of the third elastic member 270 is fixedly connected to the friction plate 260, and the other end of the third elastic member 270 is fixedly connected to the second abutment plate 210, so that the friction plate 260 can move upward to reset under the action of the third elastic member 270. The third elastic member 270 can also make the friction plate 260 have a tendency to move upward to reset, so that it can adapt to PVC films 300 with various openings, thereby improving the practicality of the flattening and conveying device for film materials used for PVC film processing.

[0059] Specifically, in this embodiment, the outer circumference of the first conveyor roller 110 and the second conveyor roller 120 are both provided with a spiral groove 130, and the outer circumference of the first conveyor roller 110 and the second conveyor roller 120 is rough, so as to have friction on the PVC film 300. The spiral groove 130 has two sections, and the two sections of the spiral groove 130 are symmetrically arranged about the midpoint of the first conveyor roller 110 and the second conveyor roller 120, and the rotation directions of the two sections of the spiral groove 130 are opposite. When the first conveyor roller 110 and the second conveyor roller 120 rotate, the two sections of the spiral groove 130 on their outer circumferences have a force that pulls the PVC film 300 toward the two ends of the first conveyor roller 110 and the second conveyor roller 120, thereby flattening the PVC film 300.

[0060] It should be noted that the spiral grooves 130 on the outer circumferences of the first conveying roller 110 and the second conveying roller 120 in this embodiment are all based on the prior art and will not be described in detail.

[0061] In a further embodiment, a driving mechanism (not shown in the figure) is further provided on the frame 100 of the present invention, and the driving mechanism is used to drive the first conveyor roller 110 and the second conveyor roller 120 to rotate. The driving mechanism can be a driving motor (not shown in the figure), and a first belt (not shown in the figure) is wound around the rotating shaft of the driving motor. The first belt is wound around the end of the first conveyor roller 110, and the driving motor drives the first conveyor roller 110 to rotate through the belt. A second belt (not shown in the figure) is provided between the first conveyor roller 110 and the second conveyor roller 120, and the first conveyor roller 110 drives the second conveyor roller 120 to rotate through the second belt.

[0062] It should be noted that the driving mechanism is not limited to the above structure and may also have other structures, which will not be described in detail here.

[0063] The specific working process of the flattening and feeding mechanism for PVC film processing provided by the present invention is described in combination with the above embodiments:

[0064] The PVC film 300 is wound on the first conveying roller 110 and the second conveying roller 120:

[0065] First, the PVC film 300 is wound on the first conveyor roller 110, and then the PVC film 300 located between the first conveyor roller 110 and the second conveyor roller 120 is passed through the first abutment plate 200, the support rod 220 and the second abutment plate 210, and the end of the PVC film 300 is pulled. At this time, one side of the PVC film 300 is cut by the blade 190 on the second abutment plate 210. The operator pulls the end of the PVC film 300 again and winds it on the second conveyor roller 120, thereby winding the PVC film 300 on the first conveyor roller 110 and the second conveyor roller 120.

[0066] Adjust the tension:

[0067] The operator twists the threaded push rod 170 to loosen the locking ring 160, moves the locking ring 160 on the support rod 220, adjusts the distance between the first abutment plate 200 and the second abutment plate 210 according to the width of the PVC film 300, and adjusts the position of the locking ring 160 on the support rod 220 as needed so that the first abutment plate 200 and the second abutment plate 210 abut against both sides of the PVC film 300. After adjusting the tension, the threaded push rod 170 is twisted in the opposite direction to fix the position of the locking ring 160, thereby completing the adjustment of the tension.

[0068] Start cutting and conveying:

[0069] The air pump (not shown in the figure) and the drive motor (not shown in the figure) are started. The drive motor drives the first conveying roller 110 and the second conveying roller 120 to rotate. The two spiral grooves 130 on the outer circumference of the first conveying roller 110 and the second conveying roller 120 can flatten the inner part of the PVC film 300 for conveying. The air pump conveys gas into the blowing plate 230. The gas passes through the second abutting plate 210 and enters the interior of the support rod 220 and the interior of the first abutting plate 200. The first blowing holes 211 on the first abutting plate 200 and the second abutting plate 210 and the second blowing holes 221 on the outer circumference of the support rod 220 blow air into the interior of the PVC film 300, so that a part of the outer side of the PVC film 300 is stretched open, thereby stretching out the wrinkles on the outer side of the PVC film 300 that are not in contact with the first conveying roller 110 and the second conveying roller 120, thereby preventing the PVC film 300 from having wrinkles during the conveying process.

[0070] If the opening of the PVC film 300 is poor:

[0071] At this time, during the transportation of the PVC film 300, the friction between the inner wall of the PVC film 300 and the friction plate 260 increases, thereby increasing the distance that the PVC film 300 drives the friction plate 260 to move downward, and the friction plate 260 slides inside the blowing plate 230 through one end of the blade 190, thereby pushing the stopper 240 to move downward, and the overlapping part of the air flow hole 241 on the stopper 240 and the air flow channel 231 inside the blowing plate 230 increases, so that more gas can enter the first abutment plate 200, the second abutment plate 210 and the support rod 220, and the amount of gas blown out by the first blowing hole 211 and the second blowing hole 221 increases, so that the blowing force is increased, so that the PVC film 300 can be better stretched.

[0072] If the opening of the PVC film 300 is good:

[0073] At this time, during the transportation of the PVC film 300, the friction between the inner wall of the PVC film 300 and the friction plate 260 is reduced, thereby reducing the distance that the PVC film 300 drives the friction plate 260 to move downward, and the second elastic member 250 at the bottom of the stopper 240 pushes the stopper 240 to move upward, and the overlapping part of the air flow hole 241 on the stopper 240 and the air flow channel 231 inside the blowing plate 230 is reduced, thereby reducing the amount of gas entering the first abutment plate 200, the second abutment plate 210 and the support rod 220, and the amount of gas blown out of the first blowing hole 211 and the second blowing hole 221 is reduced, so that the blowing force is reduced. Since the opening of the PVC film 300 is better, a smaller blowing force can also better open the PVC film 300.

[0074] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A flattening and feeding mechanism for PVC film processing, characterized in that: include: A frame, wherein a first conveying roller and a second conveying roller are rotatably provided on the frame and are parallel to each other and spaced apart, and a PVC film is wound around the first conveying roller and the second conveying roller; A support rod, wherein the support rod is located between the first conveying roller and the second conveying roller, the axis of the support rod is parallel to the axis of the first conveying roller, one end of the support rod is axially slidably arranged on the frame, and a first abutment plate is fixedly arranged on the other end of the support rod, and the first abutment plate abuts one side of the PVC film, and a second abutment plate is axially slidably arranged at a position of the support rod away from the first abutment plate, and a blade is provided on the second abutment plate, and the blade cuts the other side of the PVC film; A blowing component, the blowing component is used to blow air into the inside of the PVC film, and the blowing force of the blowing component is negatively correlated with the opening of the PVC film; The blowing assembly includes a blowing plate and a friction plate, the blowing plate being fixedly connected to the second abutting plate, the second abutting plate being provided with a plurality of first blowing holes, the blowing plate and the second abutting plate being hollow and connected to each other, the friction plate being vertically slidably arranged on the second abutting plate, the two surfaces of the friction plate being in frictional contact with the inner wall of the PVC film respectively, the friction plate being vertically slidable to change the size of the channel connecting the blowing plate and the second abutting plate, the size of the channel being negatively correlated with the opening of the PVC film; An air flow channel is provided inside the air blowing plate, a stopper is provided in the air blowing plate for vertical sliding, an air flow hole is opened on the stopper, and the air flow hole is communicated with the air flow channel.

2. The flattening and feeding mechanism for PVC film processing according to claim 1, characterized in that: A guide block is fixedly connected to the frame, and the support rod slides through the guide block. A first elastic member is sleeved on the outer periphery of the support rod, and the first elastic member pushes the first abutment plate and the second abutment plate away from each other to tension the PVC film.

3. The flattening and feeding mechanism for PVC film processing according to claim 1, characterized in that: A transverse groove is provided in the blowing plate, one end of the blade is located in the transverse groove, the other end of the blade is hinged to the friction plate, the upper end surface of the stopper is an inclined surface, the end of the blade located in the transverse groove is in sliding contact with the inclined surface, and one end of the blade slides in the transverse groove to push the stopper to move vertically.

4. The flattening and feeding mechanism for PVC film processing according to claim 3, characterized in that: A second elastic member is provided between the stopper and the blow plate, and the second elastic member can push the stopper to move upward or make the stopper have a tendency to move upward.

5. The flattening and feeding mechanism for PVC film processing according to claim 1, characterized in that: The interior of the support rod is hollow, a plurality of second air blowing holes are opened on the outer periphery of the support rod, and the interior of the support rod is communicated with the interior of the second abutting plate.

6. The flattening and feeding mechanism for PVC film processing according to claim 1, characterized in that: A third elastic member is provided between the friction plate and the second abutting plate, and the third elastic member enables the friction plate to return to its original position or to have a tendency to return to its original position.

7. The flattening and feeding mechanism for PVC film processing according to claim 1, characterized in that: The first conveying roller and the second conveying roller are both provided with a spiral groove on their outer periphery, and the spiral groove has two sections, the two sections of the spiral groove are symmetrically arranged about the midpoint of the first conveying roller and the second conveying roller, the two sections of the spiral groove have opposite rotation directions, and the two sections of the spiral groove flatten the PVC film.

8. The flattening and feeding mechanism for PVC film processing according to claim 1, characterized in that: The frame is provided with a driving mechanism, and the driving mechanism is used to drive the first conveying roller and the second conveying roller to rotate.

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