PVC cloth conveying device

Abstract

The invention provides a PVC cloth conveying device, and belongs to the technical field of PVC cloth preparation, the PVC cloth conveying device comprises a winding machine, a plurality of rotating rollers, a powder spraying assembly and a control unit, the rotating rollers are in transmission connection with cloth, the winding machine is in transmission connection with the cloth, the cloth is provided with an inclined section on a conveying path, and the powder spraying assembly comprises a box body and a spray head mechanism; the box body is provided with a first containing cavity, a first avoiding opening and a second avoiding opening which are used for allowing the inclined section to sequentially penetrate through, the spray head mechanism is used for being connected with a pneumatic powder conveying device, the spray head mechanism is provided with spray openings, the multiple spray openings are formed in the two sides of the surface of cloth located in the first containing cavity, and the multiple spray openings in each side are arranged at intervals in the extending direction of the inclined section; the nozzles on the same side evenly spray powder, powder spraying covering areas are adjacent, and the control unit is electrically connected with the winding machine and the spray head mechanism. According to the invention, the anti-sticking powder is uniformly sprayed to the PVC cloth in a relatively closed space, so that local areas of adjacent rolled cloth layers are prevented from being stuck.

Description

Technical Field

[0001] The invention relates to the technical field of PVC cloth preparation, and in particular to a PVC cloth transmission device. Background Art

[0002] PVC fabric is a synthetic material made from polyvinyl chloride resin as the main raw material. It has excellent waterproof, moisture-proof, mildew-proof, and corrosion-resistant properties. It is relatively wear-resistant, easy to fold, and has a soft texture. It is widely used in outdoor tents, parasols, advertising tents, car tarpaulins and other fields.

[0003] After the PVC fabric is printed with a pattern, it will first be heat-dried and then transferred to the winder through a transmission device for winding. Since the pattern printed by the dye has not been completely cooled and dried after the PVC fabric is heat-dried, the adjacent fabric layers will stick together during the winding process. Therefore, anti-sticking powder, such as talcum powder, is generally applied to the upper and lower surfaces of the PVC fabric during the transmission process.

[0004] However, currently, a powder box is usually installed on the transmission device, and powder is dropped from the powder box onto the PVC cloth passing below it. However, in this powder spreading method, the distribution position of the dropped powder is difficult to control, resulting in uneven distribution of the powder adhered to the PVC cloth. When winding, it may cause local areas of adjacent cloth layers to stick together, thereby affecting the quality of the PVC cloth. Summary of the invention

[0005] Based on this, the object of the present invention is to provide a PVC cloth transmission device, which is designed to evenly spray anti-stick powder on the PVC cloth to avoid adhesion between local areas of adjacent cloth layers when winding.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a PVC cloth transmission device, including a winding machine, a plurality of rollers, a powder spraying assembly, and a control unit. The roller is connected to the PVC cloth in a transmission manner, and the winding machine is connected to the PVC cloth in a transmission manner to pull the PVC cloth on the roller for transmission along a curved path. The PVC cloth is provided with at least one inclined section on the curved path, and the powder spraying assembly is located at one of the inclined sections. The powder spraying assembly includes a box body and a nozzle mechanism. The box body is provided with a first accommodating chamber and a first avoidance port and a second avoidance port connected to the first accommodating chamber. The inclined section is inserted into the first accommodating chamber from the first avoidance port and extends out from the second avoidance port. The nozzle mechanism is used to connect a pneumatic powder conveying device. The nozzle mechanism is provided with a nozzle, which is located at a position A plurality of nozzles are arranged on both sides of the surface of the PVC cloth in the first accommodating cavity, and the plurality of nozzles on each side are arranged at intervals along the extending direction of the inclined section. Each nozzle on the same side sprays powder evenly and the powder spraying coverage area is adjacent, and the control unit is electrically connected to the winder and the nozzle mechanism; wherein, when the inclined section is spraying powder, the control unit controls the winder to stop moving, and controls the nozzle mechanism to move, so that the plurality of nozzles spray powder in sequence; when the plurality of nozzles have finished spraying powder, the control unit controls the winder to move, so that the PVC cloth moves a stroke of the inclined section in the bending path.

[0008] In addition, the PVC cloth transmission device according to the present invention may also have the following additional technical features:

[0009] Furthermore, the nozzle mechanism includes a powder dividing block and an opening and closing component. The powder dividing block is arranged on the box body. The number of the powder dividing blocks is consistent with the number of the nozzles. The powder dividing block is provided with a second accommodating chamber and a powder inlet and a powder outlet connected to the second accommodating chamber. The powder inlet is used to connect the powder feeding device, and the powder outlet is connected to the nozzle. The opening and closing component is electrically connected to the control unit; wherein the control unit sequentially controls each of the opening and closing components to open and close the transmission channel between the powder inlet and the powder outlet.

[0010] Further, the opening and closing component includes a slide rail, a sealing block, a first air pump, a second air pump, and a trigger component. The slide rail is arranged in the second accommodating chamber, the sealing block is slidably arranged on the slide rail and is located in the second accommodating chamber, a through hole is arranged in the middle of the sealing block, and the sealing block and the second accommodating chamber are sealed to form a first air chamber and a second air chamber on both sides of the through hole. The first air pump is communicated with the first air chamber, and the second air pump is communicated with the second air chamber. When the pressure of the first air chamber is equal to that of the second air chamber, the two ends of the through hole are respectively communicated with the powder inlet and the powder outlet. When the pressure of the first air chamber is not equal to that of the second air chamber, the two ends of the through hole are not communicated with the powder inlet and the powder outlet. The trigger component is transmission-connected to the nozzle mechanism and electrically connected to the control unit; wherein, when the nozzle finishes spraying powder, the trigger component generates a trigger signal, and the control unit controls the first air pump and the second air pump to cooperate according to the trigger signal so that the two ends of the through hole are not communicated with the powder inlet and the powder outlet.

[0011] Furthermore, the trigger assembly includes a rotating block, a proximity switch, and a turntable. The rotating block is rotatably arranged on the box body, and arc-shaped slide grooves are arranged on the outer peripheral wall of the rotating block at intervals along its circumference. The number of the slide grooves is the same as the number of the nozzles on the same side of the PVC cloth. Both ends of the slide grooves pass through the two side ends of the rotating block. The turntable is arranged next to the rotating block, and the rotation center of the turntable is perpendicular to the rotation center of the turntable. A card block extending radially thereof is provided on the periphery of the notch of the turntable, and the card block matches the slide groove. The proximity switch is arranged on the card block, and the proximity switch is electrically connected to the control unit; wherein, when the turntable rotates, the card block slides in the slide groove and abuts against the proximity switch.

[0012] Furthermore, a pair of heat dissipation clamps are provided at the first avoidance and the second avoidance, the inclined section is sandwiched between the two heat dissipation clamps, and a water channel is provided in the heat dissipation clamp, and the water channel is used to connect a circulating water cooling device.

[0013] Furthermore, an elastic buffer is provided between the heat dissipation clamping plate and the box body.

[0014] Furthermore, an open loading trough is provided on the rotating roller located at the bottom end of the inclined section, a first unloading port is provided at one end of the rotating roller, a cover plate and a first driving mechanism for driving the cover plate to rotate are rotatably connected at the opening of the loading trough, the first driving mechanism is electrically connected to the control unit, and a first brush extending axially thereof is provided on the rotating roller; wherein, when the rotating block rotates one circle, the control unit controls the cover plate to open and close the loading trough.

[0015] Furthermore, a discharge assembly is provided in the loading trough, and the discharge assembly is used to move the anti-sticking powder to the first discharge port side.

[0016] Furthermore, the discharge assembly includes a base, a rotating shaft, a conveyor belt, and an annular flexible cassette, the base is arranged in the loading trough, the rotating shaft is rotatably arranged on the base, the rotating shaft is transmission-connected to the turntable, the rotating shaft has a push block extending outward, the rotating shaft is provided with an arc-shaped guide block, the conveyor belt is arranged in the loading trough and along the extension direction of the loading trough, the flexible cassette is slidably arranged on the base and connected to the conveyor belt, and the flexible cassette is provided with slots matching the push blocks and guide slots matching the guide blocks at intervals.

[0017] Furthermore, a baffle is provided on the periphery of the roller located at the bottom end of the inclined section, and the baffle is connected to the side of the box body close to the second avoidance opening to surround the roller. A second discharge opening is provided at the bottom of the baffle, and a second brush is provided between the baffle and the PVC cloth.

[0018] The beneficial effects of the present invention include at least: through the cooperation of the winding machine and multiple rollers, the PVC cloth is pulled along the bending path for transmission, which is beneficial to the heat dissipation of the PVC cloth. At the same time, a box and a nozzle mechanism are arranged on the bending path, and powder is sprayed in the box by using the nozzle mechanism. At the same time, multiple nozzles are arranged at intervals along the extension direction of the inclined section on each side of the PVC cloth, and each nozzle on the same side is evenly powdered and the powder spraying coverage area is adjacent, so that the powder adhered to the PVC cloth can be unevenly distributed, and the local area of ​​adjacent cloth layers can be prevented from bonding to a certain extent when the cloth is rolled up. Moreover, since the box is relatively closed, the powder is not easy to fly out of the box, so as to avoid polluting the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of a PVC cloth transmission device in one embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a box body in one embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of a heat dissipation clamp in one embodiment of the present invention;

[0022] Figure 4 It is a structural schematic diagram of an opening and closing component in one embodiment of the present invention;

[0023] Figure 5 It is a structural schematic diagram of a rotating block in one embodiment of the present invention;

[0024] Figure 6is a schematic structural diagram of a turntable in an embodiment of the present invention;

[0025] Figure 7 is a schematic structural diagram of a rotating roller in one embodiment of the present invention;

[0026] Figure 8 It is a structural schematic diagram of a discharge assembly in one embodiment of the present invention;

[0027] Description of main component symbols:

[0028] PVC cloth 20, inclined section 21, beam frame 30, winding machine 100, rotating roller 200, loading trough 210, cover plate 230, first brush 250, box body 310, first accommodating chamber 311, first avoidance port 312, second avoidance port 313, powder dividing block 321, second accommodating chamber 3211, powder inlet 3212, powder outlet 3213, opening and closing assembly 322, slide rail 3221, sealing block 3222, first air pump 3223, second air pump 3224, through hole 3226, first air chamber 3227, second air chamber 3228, rotating block 331, slide groove 3311, proximity switch 332, rotating disk 333, clamping block 3331, nozzle 340, heat dissipation clamping plate 400, elastic buffer 500, discharge assembly 600, base 610, rotating shaft 620, push block 621, guide block 622, flexible cassette 640, clamping groove 641, guide groove 642, baffle 700, second brush 720;

[0029] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] Please refer to Figures 1 to 8 , a PVC cloth transmission device provided by the present invention includes a winder 100, a plurality of rollers 200, a powder spraying assembly, and a control unit (not shown in the drawings).

[0034] Specifically, the roller 200 is transmission-connected to the PVC cloth 20, and the winder 100 is transmission-connected to the PVC cloth 20. When the winder 100 rotates and winds the PVC cloth 20, the winder 100 and the roller 200 cooperate to tension the PVC cloth 20 and pull the PVC cloth 20 on the roller 200 to be transmitted along the curved path. The PVC cloth 20 is provided with at least one inclined section 21 on the curved path.

[0035] The powder spraying assembly is located at one of the inclined sections 21. Specifically, the powder spraying assembly includes a box body 310 and a nozzle mechanism (not shown in the drawings). A first accommodating chamber 311 is provided inside the box body 310, and a first avoidance port 312 and a second avoidance port 313 communicating with the first accommodating chamber 311 are also provided inside the box body 310. The inclined section 21 is inserted into the first accommodating chamber 311 from the first avoidance port 312 and extends out from the second avoidance port 313. At this time, the PVC fabric 20 is in a state of passing through the box body 310. In this way, powder spraying inside the box body 310 can prevent powder from flying and avoid powder waste. The nozzle mechanism is used to connect a pneumatic powder conveying device (not shown in the drawings) to mix the powder through airflow to achieve the purpose of efficient powder transmission. When the powder spraying is implemented specifically, a nozzle 340 is provided in the nozzle mechanism, and multiple nozzles 340 are provided on both sides of the surface of the PVC cloth 20 located in the first accommodating chamber 311. The multiple nozzles 340 on each side of the surface of the PVC cloth 20 are arranged at intervals along the extension direction of the inclined section 21. In order to ensure that the powder on the surface of each side of the PVC cloth 20 is evenly distributed, the powder spraying amount of each nozzle 340 on the same side of the PVC cloth 20 is uniform, and the powder spraying coverage area of ​​each nozzle 340 on the surface of the PVC cloth 20 is adjacent but not overlapped, so as to avoid inconsistent dust thickness.

[0036] The control unit is electrically connected to the winding machine 100 and the nozzle mechanism. When the inclined section 21 is subjected to powder spraying, the control unit controls the winding machine 100 to stop moving. At this time, the inclined section 21 is in a stationary state. The control unit starts to control the nozzle mechanism to move so that the multiple nozzles 340 on each side of the PVC cloth 20 spray powder in sequence. For example, the multiple nozzles 340 spray powder from top to bottom in sequence. For another example, the multiple nozzles 340 spray powder from bottom to top in sequence, so that the powder on the surface of the cloth on both sides of the inclined section 21 is evenly distributed. After the multiple nozzles 340 have finished spraying powder, the control unit controls the winding machine 100 to move so that the PVC cloth 20 moves a stroke of the inclined section 21 on the curved path. Repeating the above operation, the PVC cloth 20 can be continuously sprayed with powder.

[0037] In this embodiment, optionally, the control unit may be an electronic control device such as an MCU controller, a PLC controller, or an FPGA controller.

[0038] In some optional embodiments, such as Figure 1 As shown, the roller 200 , the powder spraying assembly, and the control unit can all be fixed on the beam frame 30 .

[0039] In some optional embodiments, such as Figure 2 , Figure 4 As shown, the nozzle mechanism includes a powder distribution block 321 and an opening and closing assembly 322. The powder distribution block 321 is arranged on the box body 310, and the number of the powder distribution block 321 is the same as that of the nozzle 340. The interior of the powder distribution block 321 is provided with a second accommodating chamber 3211, and the powder distribution block 321 is provided with a powder inlet 3212 and a powder outlet 3213 connected to the second accommodating chamber 3211. The powder inlet 3212, the second accommodating chamber 3211 and the powder outlet 3213 form a transmission channel for transmitting powder. During the powder spraying operation, the powder inlet 3212 is connected to the powder feeding device (not shown in the drawings), and the powder outlet 3213 is connected to the nozzle 340. The opening and closing assembly 322 is electrically connected to the control unit. When the multiple nozzles 340 on each side of the PVC cloth 20 spray powder in sequence, the control unit controls each opening and closing assembly 322 in sequence to open and close the transmission channel between the powder inlet 3212 and the powder outlet 3213.

[0040] In some optional embodiments, such as Figure 4As shown, the opening and closing assembly 322 includes a slide rail 3221, a sealing block 3222, a first air pump 3223, a second air pump 3224, and a trigger assembly (not shown in the drawings). The slide rail 3221 is arranged in the second accommodating chamber 3211, and the sealing block 3222 is slidably arranged on the slide rail 3221, and the sealing block 3222 is located in the transmission channel. A through hole 3226 is provided in the middle of the sealing block 3222, and the sealing block 3222 is sealed with the second accommodating chamber 3211, so that a first air chamber 3227 and a second air chamber 3228 can be formed on both sides of the through hole 3226. In order to apply a thrust to both sides of the sealing block 3222 that can move on the slide rail 3221, the first air pump 3223 is connected to the first air chamber 3227, and the second air pump 3224 is connected to the second air chamber 3228. During use, when the pressures formed after the gas is transported in the first air chamber 3227 and the second air chamber 3228 are equal, the two ends of the through hole 3226 in the middle of the sealing block 3222 are respectively connected to the powder inlet 3212 and the powder outlet 3213, so that the powder transported by the powder feeding device can enter the nozzle 340 along the powder inlet 3212, the through hole 3226 and the powder outlet 3213 in sequence; when the pressures formed after the gas is transported in the first air chamber 3227 and the second air chamber 3228 are not equal, the sealing block 3222 moves to the side of the gas with lower pressure, so that the two ends of the through hole 3226 are not connected to the powder inlet 3212 and the powder outlet 3213, and the powder transported by the powder feeding device cannot enter the nozzle 340.

[0041] The trigger assembly is in transmission connection with the nozzle mechanism, and the trigger assembly is also electrically connected with the control unit. When the nozzle 340 has finished spraying powder, the trigger assembly generates a trigger signal, and the control unit controls the first air pump 3223 and the second air pump 3224 to cooperate with each other according to the trigger signal, so that the pressure formed after the gas is transported in the first air chamber 3227 and the second air chamber 3228 is equal, so that the two ends of the through hole 3226 in the middle of the sealing block 3222 are respectively connected with the powder inlet 3212 and the powder outlet 3213, and the powder transported by the powder feeding device can enter the nozzle 340 along the powder inlet 3212, the through hole 3226 and the powder outlet 3213 in sequence.

[0042] In some optional embodiments, such as Figure 5 , Figure 6As shown, the trigger assembly includes a rotating block 331, a proximity switch 332, and a rotating disk 333. The rotating block 331 is rotatably arranged on the box body 310. The outer peripheral wall of the rotating block 331 is provided with arc-shaped slide grooves 3311 at intervals along its circumference. The number of the slide grooves 3311 is the same as the number of the nozzles 340 on the same side of the PVC cloth 20. The two ends of the slide grooves 3311 pass through the two side ends of the rotating block 331. The rotating disk 333 is arranged beside the rotating block 331. The rotation center of the rotating disk 333 is perpendicular to the rotation center of the rotating block 331. The peripheral edge of the notch 334 of the rotating disk 333 is provided with a clamping block 3331 extending in its radial direction. The circumference of the notch 334 matches the arc length of the slide groove 3311, and the clamping block 3331 matches the slide groove 3311. The proximity switch 332 is installed on the clamping block 3331, and the proximity switch 332 is electrically connected to the control unit. When the turntable 333 rotates, the block 3331 penetrates the slide slot 3311 from the end of the rotating block 331 and slides along the slide slot 3311. At this time, the proximity switch 332 abuts against the slide slot 3311 and is squeezed, so that the proximity switch 332 generates an electrical signal. When the electrical signal is detected by the control unit, it means that the block 3331 is located in the slide slot 3311. Since the slide slot 3311 is in an inclined state, the block 3331 can push the rotating block 331 to rotate. When the rotating block 3331 moves out of the slide slot 3311, the proximity switch 332 does not abut against the slide slot 3311. At this time, the proximity switch 332 does not generate an electrical signal. The control unit determines that the block 3331 is located outside the slide slot 3311. At this time, since the block 3331 does not push the rotating block 331, the rotating block 331 remains stationary. Optionally, the proximity switch 332 can select a capacitive sensor, a resistance sensor, or a pressure sensor.

[0043] In some optional embodiments, such as Figure 3 As shown, a pair of heat dissipation clamps 400 are provided at the first avoidance 312 and the second avoidance 313, and the inclined section 21 is sandwiched between the two heat dissipation clamps 400. A water channel (not shown in the drawings) is provided in the heat dissipation clamps 400. When in use, the water channel is connected to a circulating water cooling device (not shown in the drawings), and the circulating water cooling device delivers a cooling medium to the water channel. When the heat dissipation clamps 400 are in contact with the inclined section 21, the heat on the PVC fabric 20 is conducted to the cooling medium and taken away, thereby reducing the temperature of the PVC fabric 20. The powder spraying operation in the later stage is used to prevent the powder from sticking to the PVC fabric 20, resulting in the inability to remove the powder on the surface later.

[0044] Since the PVC cloth 20 will swing to a certain extent during the transmission process, in order to prevent the swinging PVC cloth 20 from being squeezed by the box 310 and the heat dissipation clamping plate 400 when passing through the first avoidance opening 312 and the second avoidance opening 313, in some optional embodiments, such as Figure 3As shown, an elastic buffer 500 is provided between the heat dissipation clamp 400 and the box 310. Thus, when the PVC fabric 20 swings, the elastic buffer 500 is displaced, so that the swinging PVC fabric 20 does not scrape the box 310 and the heat dissipation clamp 400, thereby preventing the surface of the PVC fabric 20 from being damaged. Optionally, the elastic buffer 500 can be a spring, an elastic sheet or other parts.

[0045] In some optional embodiments, such as Figure 7 As shown, an open loading trough 210 is provided on the roller 200a at the bottom end of the inclined section 21, and a first discharge port (not shown in the drawings) is provided at one end of the roller 200a. A cover plate 230 is rotatably connected to the opening of the loading trough 210, and a first driving mechanism (not shown in the drawings) for driving the cover plate 230 to rotate. Optionally, a cavity can be provided on the shell of the roller 200a, and the cover plate 230 is slidably provided in the cavity. During assembly, the first driving mechanism is electrically connected to the control unit, and the roller 200a is provided with a first brush 250 extending axially thereof. When the rotating block 331 rotates one circle, the control unit controls the cover plate 230 to completely open and close the loading trough 210. When the new inclined end 21 is sprayed with powder, the control unit controls the cover plate 230 to completely close the loading trough 210. Optionally, the control unit can determine whether the rotating block 331 has rotated one circle by counting the number of trigger signals generated by the proximity switch 332.

[0046] In this embodiment, when the rotating block 331 starts to rotate again, the control unit controls the cover plate 230 to completely close the loading trough 210. By opening and closing the loading trough 210, after the PVC cloth 20 after powder spraying moves out of the second avoidance port 313, the loading trough 210 in the open and closed state can collect the powder dropped on the PVC cloth 20 or at the first discharge port, so as to avoid the powder flying caused by the rotating roller 200, or avoid the powder adhering to the PVC cloth 20, resulting in uneven distribution of the powder. When the PVC cloth 20 passes through the roller 200a, the first brush 250 abuts against the side surface of the PVC cloth 20, so that the powder that is not completely attached to the PVC cloth 20 is removed and falls into the loading trough 210 and is collected, so as to avoid the powder falling into the workplace during the subsequent transmission of the PVC cloth 20, thereby causing the waste and flying of the powder.

[0047] In order to facilitate the collection of fallen powder for reuse, in some optional embodiments, such as Figure 8 As shown, a discharge assembly 600 is provided in the loading trough 210. Specifically, the discharge assembly 600 is used to move the anti-sticking powder to the first discharge port side, and receive the powder discharged from the first discharge port during recycling.

[0048] In some optional embodiments, such as Figure 8As shown, specifically, the discharge assembly 600 includes a base 610, a rotating shaft 620, a transmission belt (not shown in the drawings), and an annular flexible cassette 640. The base 610 is arranged in the loading trough 210, and the rotating shaft 620 is rotatably arranged on the base 610. The rotating shaft 620 is connected to the rotating disk 333 by transmission. Optionally, the rotating shaft 620 and the rotating disk 333 can be transmitted through a gear set. It should be noted that the transmission ratio of the gear set needs to be set accordingly according to the discharge speed. For example, when the rotating disk 333 rotates one circle, the rotating shaft also rotates one circle. The rotating shaft 620 extends outward with a push block 621, and an arc-shaped guide block 622 is arranged on the rotating shaft 620. The transmission belt is arranged in the loading trough 210, and the transmission belt is arranged along the extension direction of the loading trough 210. The flexible cassette 640 is slidably arranged on the base 610, and the flexible cassette 640 is connected to the transmission belt. Since the transmission belt is annular, the flexible cassette 640 is also arranged in annular shape. It should be noted that the flexible cassette 640 needs to be made of a material with a certain degree of flexibility, such as polyimide engineering plastic, so as to ensure that the flexible cassette 640 can be bent into a ring shape and has a certain structural strength when pushed by the push block 621. In addition, the flexible cassette 640 is provided with slots 641 that match the push block 621 at intervals, and the flexible cassette 640 is also provided with guide slots 642 that match the guide block 622 at intervals. When the turntable 333 rotates one circle, the push block 621 rotates and snaps into one of the slots 641. At this time, the turntable 333 continues to rotate. When the push block 621 leaves the slot 641, the guide block 622 rotates into the guide slot 642, so that the flexible cassette 640 always slides continuously on the base 610. Since the flexible cassette 640 is connected to the conveyor belt, the flexible cassette 640 drives the conveyor belt to move, and then the conveyor belt moves the powder carried on it toward the first discharge port, and finally discharges the powder from the first discharge port in sequence.

[0049] In some optional embodiments, such as Figure 7 As shown, a baffle 700 is provided on the periphery of the roller 200a at the bottom end of the inclined section 21, and the baffle 700 is connected to the side of the box 310 close to the second avoidance opening 313. The baffle 700 surrounds the roller 200a as a whole to prevent the powder from leaking out and flying. A second discharge opening (not shown in the drawings) is provided at the bottom of the baffle 700, and a second brush 720 is provided between the baffle 700 and the PVC cloth 20.

[0050] In this embodiment, when the PVC cloth 20 passes through the rotating roller 200a, the second brush 720 contacts the other side surface of the PVC cloth 20, so that the powder that is not completely attached to the PVC cloth 20 is removed and falls into the baffle 700 and is collected, thereby preventing the powder from falling into the workplace during the subsequent transmission of the PVC cloth 20, thereby causing powder waste and flying.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A PVC cloth transmission device, characterized in that: The PVC cloth transmission device comprises: Winding machine; A plurality of rollers, wherein the rollers are drivingly connected to the PVC cloth, and the winding machine is drivingly connected to the PVC cloth, so as to pull the PVC cloth on the rollers to be transmitted along a curved path, and the PVC cloth is provided with at least one inclined section on the curved path; A powder spraying assembly is located at one of the inclined sections, the powder spraying assembly comprises a box body and a nozzle mechanism, the box body is provided with a first accommodating chamber and a first avoidance port and a second avoidance port communicated with the first accommodating chamber, the inclined section is penetrated into the first accommodating chamber from the first avoidance port, and extends out from the second avoidance port; the nozzle mechanism is used to connect the pneumatic powder conveying device, the nozzle mechanism is provided with a nozzle, a plurality of nozzles are provided on both sides of the surface of the PVC cloth located in the first accommodating chamber, the plurality of nozzles on each side are arranged at intervals along the extending direction of the inclined section, each nozzle on the same side sprays powder evenly and the powder spraying coverage area is adjacent; A control unit, electrically connected to the winding machine and the nozzle mechanism; Among them, when the inclined section is spraying powder, the control unit controls the winding machine to stop moving, and at the same time controls the action of the nozzle mechanism to make the multiple nozzles spray powder in sequence; when the multiple nozzles have finished spraying powder, the control unit controls the movement of the winding machine to make the PVC cloth move the stroke of one inclined section in the bending path.

2. The PVC cloth transmission device according to claim 1, characterized in that: The nozzle mechanism comprises: A powder distribution block is arranged on the box body and has the same number as the nozzles. The powder distribution block is provided with a second accommodating cavity and a powder inlet and a powder outlet communicated with the second accommodating cavity. The powder inlet is used to connect to a powder feeding device, and the powder outlet is communicated with the nozzles. An opening and closing component, electrically connected to the control unit; Wherein, the control unit sequentially controls each of the opening and closing components to open and close the transmission channel between the powder inlet and the powder outlet.

3. The PVC cloth transmission device according to claim 2, characterized in that: The opening and closing assembly comprises: A slide rail, disposed in the second accommodating cavity; A sealing block is slidably disposed on the slide rail and is located in the second accommodating cavity. A through hole is provided in the middle of the sealing block. The sealing block and the second accommodating cavity are sealed to form a first air chamber and a second air chamber on both sides of the through hole. a first air pump, connected to the first air chamber; a second air pump, connected to the second air chamber; when the pressures of the first air chamber and the second air chamber are equal, the two ends of the through hole are respectively connected to the powder inlet and the powder outlet; when the pressures of the first air chamber and the second air chamber are not equal, the two ends of the through hole are not connected to the powder inlet and the powder outlet; A trigger assembly, drivingly connected to the nozzle mechanism and electrically connected to the control unit; Among them, when the nozzle finishes spraying powder, the trigger component generates a trigger signal, and the control unit controls the first air pump and the second air pump to cooperate according to the trigger signal so that the two ends of the through hole are not connected to the powder inlet and the powder outlet.

4. The PVC cloth transmission device according to claim 2, characterized in that: The trigger component comprises: A rotating block is rotatably arranged on the box body, and arc-shaped slide grooves are arranged on the outer peripheral wall of the rotating block at intervals along the circumference thereof, and the number of the slide grooves is the same as the number of the nozzles on the same side of the PVC cloth, and the two ends of the slide grooves pass through the two side ends of the rotating block; A rotating disk is arranged beside the rotating block, the rotating center of the rotating disk is perpendicular to the rotating center of the rotating block, and a clamping block extending in the radial direction is arranged on the periphery of the notch of the rotating disk, and the clamping block matches the sliding groove; A proximity switch, disposed on the card block, the proximity switch being electrically connected to the control unit; Wherein, when the rotating disk rotates, the blocking block slides in the sliding groove and abuts against the proximity switch.

5. The PVC cloth transmission device according to claim 1, characterized in that: A pair of heat dissipation clamps arranged mutually are provided at the first avoidance and the second avoidance, the inclined section is sandwiched between the two heat dissipation clamps, and a water channel is provided in the heat dissipation clamp, and the water channel is used to connect a circulating water cooling device.

6. The PVC cloth transmission device according to claim 5, characterized in that: An elastic buffer is provided between the heat dissipation clamping plate and the box body.

7. The PVC cloth transmission device according to claim 4, characterized in that: The roller at the bottom end of the inclined section is provided with an open loading trough, one end of the roller is provided with a first discharge port, the opening of the loading trough is rotatably connected to a cover plate and a first driving mechanism that drives the cover plate to rotate, the first driving mechanism is electrically connected to the control unit, and the roller is provided with a first brush extending axially thereof; Wherein, when the rotating block rotates one circle, the control unit controls the cover plate to open and close the loading chute.

8. The PVC cloth conveying device according to claim 7, characterized in that: A discharge assembly is provided in the loading trough, and the discharge assembly is used to move the anti-sticking powder to the first discharge port side.

9. The PVC cloth conveying device according to claim 8, characterized in that: The discharge assembly comprises: A base, arranged in the charging trough; A rotating shaft is rotatably disposed on the base and is drivingly connected to the turntable, a push block is extended outward from the rotating shaft, and an arc-shaped guide block is provided on the rotating shaft; A conveyor belt is arranged in the loading trough and along the extending direction of the loading trough; An annular flexible cassette is slidably arranged on the base and connected to the transmission belt. The flexible cassette is provided with slots matching the push block and guide slots matching the guide block at intervals.

10. The PVC cloth conveying device according to any one of claims 7 to 9, characterized in that: A baffle is provided on the periphery of the rotating roller at the bottom end of the inclined section, and the baffle is connected to the side of the box body close to the second avoidance opening to surround the rotating roller. A second discharge opening is provided at the bottom of the baffle, and a second brush is provided between the baffle and the PVC cloth.

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