A plastic sheet winding apparatus

Abstract

The application discloses a plastic sheet winding equipment and belongs to the technical field of plastic sheets. Mainly including a winding mechanism, a switching part is arranged below the winding mechanism, a pushing part is arranged on the winding mechanism, and a temporary storage part is arranged on the winding mechanism and above the switching part, the temporary storage part comprises a temporary storage box, the temporary storage box has a cavity, two groups of second sliding grooves are arranged on the two sides of the temporary storage box, second sliding blocks are arranged in the second sliding grooves, and a second electric cylinder is arranged on the temporary storage box, and the output end of the second electric cylinder is fixedly connected with the second sliding blocks. The plastic sheet winding equipment has the temporary storage part with the opposite sliding grooves and the supporting roller driven by the electric cylinder, so that the continuously conveyed materials can be orderly pushed and squeezed during the winding change, orderly temporary storage and smooth release can be realized without stopping.

Description

Technical Field

[0001] This invention relates to the technical field of packaging equipment for winding plastic sheets, specifically a plastic sheet winding device. Background Technology

[0002] Plastic sheets refer to sheet-like or plate-like plastic products made from thermoplastic resin as the main raw material through processes such as extrusion and calendering. After the production of plastic sheets is completed, they generally need to be packaged in rolls.

[0003] In the current packaging process, plastic sheets are wound onto take-up drums using a roll forming device. Once a take-up drum reaches the predetermined diameter, the plastic sheet needs to be cut manually or semi-automatically, and the new sheet head is wound onto a new take-up drum to complete the roll change operation.

[0004] However, in order to cut the plastic sheet and complete the handover between the old and new winding drums, the downstream winding operation must be temporarily stopped, while the upstream conveying equipment continues to discharge material. This leads to a contradiction between the continuous upstream conveying of plastic sheet and the temporary cessation of downstream receiving during the short time of roll changing. As a result, the plastic sheet accumulates, wrinkles, or even tangles at the cutting point, causing not only waste of plastic sheet and an increase in scrap rate, but also seriously affecting production efficiency and product quality stability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a plastic sheet winding device that solves the problem of material accumulation and wrinkling caused by the contradiction between the continuous discharge of upstream material and the suspension of downstream material receiving during the roll changing process.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a plastic sheet winding device, comprising:

[0007] Production equipment;

[0008] A winding mechanism is provided on one side of the production equipment;

[0009] A switching unit is disposed below the winding mechanism;

[0010] A pushing part, which is disposed on one side of the winding mechanism, is used to push the end of the material toward the winding mechanism to achieve initial winding;

[0011] A temporary storage section is disposed on the winding mechanism and located above the switching section, the temporary storage section comprising:

[0012] A temporary storage box having a cavity, an inlet at the top of the temporary storage box, and an outlet at the bottom of the temporary storage box;

[0013] Two second slides, one of which is located on one side of the temporary storage box and the other is located on the other side of the temporary storage box, and the two second slides are vertically spaced apart.

[0014] Two second sliders are slidably disposed in corresponding second grooves, and a retaining roller is provided on the side of the second slider facing the inside of the temporary storage box;

[0015] Two second electric cylinders are mounted on the temporary storage box, and the output end of the second electric cylinder is fixedly connected to the corresponding second slider.

[0016] During roll changing, the second electric cylinder drives the corresponding second slider and the abutment roller on it to slide along the corresponding second slide groove, wherein the two second sliders and the abutment roller on them slide vertically from bottom to top in sequence, and the sliding directions are opposite to push the material entering the temporary storage box into an S-shaped state.

[0017] Furthermore, the winding mechanism includes a frame disposed on one side of the production equipment, a transition roller rotatably disposed on the frame, and a mounting frame fixedly disposed at the other end of the frame.

[0018] Furthermore, the switching unit includes two crossbeams fixedly disposed on both sides of the bottom end of the mounting frame, and a first base is fixedly disposed on one side of the crossbeam. A first fixing frame is rotatably disposed on the first base. A first motor is fixedly disposed on one side of the first base, and the output shaft of the first motor passes through the first base and is fixedly connected to the first fixing frame.

[0019] Furthermore, a second motor is fixedly installed at both ends of the first fixing frame, and the output shaft of the second motor passes through its respective end and is fixedly connected to a clamping rod.

[0020] Furthermore, a second base is fixedly installed on the crossbeam on the other side, and a second fixing frame is rotatably installed on the second base. A hollow positioning rod is slidably inserted through each of the two ends of the second fixing frame. A fixing ring is sleeved on the positioning rod. A cylinder is fixedly installed at each end of the second fixing frame. The output end of the cylinder passes through the end and is fixedly connected to the corresponding fixing ring.

[0021] Furthermore, a take-up drum is provided between the clamping rod and the positioning rod. The take-up drum has an inner cavity and multiple sets of negative pressure holes are formed on its surface. One end of the positioning rod is used to connect to an external negative pressure source, and the other end is used to insert into the inside of the take-up drum to form a negative pressure inside the take-up drum.

[0022] Furthermore, the pushing part includes brackets fixedly disposed on both sides of one end of the mounting frame, each bracket having a first sliding groove, a first slider being slidably disposed in the first sliding groove, and a pressure roller being rotatably disposed between the first sliders.

[0023] Furthermore, a first electric cylinder is fixedly installed at one end of the bracket, and the output end of the first electric cylinder passes through the bracket and is fixedly connected to the first slider.

[0024] Furthermore, a clamping assembly is provided below the outlet of the temporary storage section, the clamping assembly comprising:

[0025] Slide rails are provided on both sides of the mounting bracket;

[0026] A slide block, which is mounted on the slide rail;

[0027] A vertical plate is mounted on the slide block;

[0028] A connecting seat is fixedly disposed between the bottom ends of the two vertical plates;

[0029] A fourth electric cylinder is disposed on both sides of the temporary storage box, and the output end of the fourth electric cylinder is fixedly connected to the vertical plate;

[0030] A fixed roller is fixedly disposed between the vertical plates and close to the connecting seat;

[0031] A movable roller, the two ends of which are slidably disposed in the third groove on the vertical plate via a third slider;

[0032] A third electric cylinder is mounted on the vertical plate, and its output end is connected to the third slider to drive the moving roller to move closer to or away from the fixed roller.

[0033] Furthermore, the mounting bracket is provided with a cutting assembly, the cutting assembly comprising:

[0034] An extension seat is fixedly mounted on the third slider and located below the moving roller;

[0035] A transmission assembly, which is disposed on the extension seat, has a sliding block capable of linear reciprocating motion;

[0036] A cutter, which is mounted on the sliding block, is used to cut the material;

[0037] A retaining plate is disposed on the connecting seat and located below the fixed roller, and is used to hold the material in place during cutting.

[0038] The beneficial effects of the present invention are as follows: The plastic sheet winding device provided by the present invention, by setting a temporary storage part with a sliding groove and a holding roller driven by an electric cylinder, achieves the effect of orderly pushing and squeezing the continuously conveyed material during the roll changing process, realizing orderly temporary storage and smooth release without stopping the machine. Attached Figure Description

[0039] Figure 1 This is an overall schematic diagram of a plastic sheet winding device according to the present invention;

[0040] Figure 2 for Figure 1 A partial schematic diagram of the roll-forming mechanism;

[0041] Figure 3 for Figure 1 Another angle view of the partial roll forming mechanism;

[0042] Figure 4 for Figure 2 Exploded view of the switching section;

[0043] Figure 5 for Figure 4 A magnified view of part A in the diagram;

[0044] Figure 6 for Figure 4 A magnified view of part B in the diagram;

[0045] Figure 7 for Figure 1 A schematic diagram of the intermediate temporary storage section;

[0046] Figure 8 for Figure 7 A magnified view of part of C;

[0047] Figure 9 for Figure 7 A magnified view of part of D;

[0048] Figure 10 for Figure 1 A schematic diagram of the temporary storage section from another angle;

[0049] Figure 11 for Figure 10 A magnified view of part of E in the diagram;

[0050] Figure 12 for Figure 7 Cross-sectional view of the temporary storage box;

[0051] Figure 13 This is a diagram illustrating the temporary storage operation.

[0052] The following are the labeling elements in the figure:

[0053] 1. Production equipment; 2. Coiling mechanism; 20. Conveying equipment; 21. Frame; 22. Transition rolls; 23. Mounting frame;

[0054] 3. Switching unit; 30. Crossbeam; 31. First base; 32. First fixing frame; 33. First motor; 34. Second motor; 35. Locking rod; 36. Cylinder; 37. Fixing ring; 38. Positioning rod; 39. Take-up drum; 390. Negative pressure hole;

[0055] 4. Pushing part; 40. Support; 41. First slide groove; 42. First slider; 43. Pressure roller; 44. First electric cylinder;

[0056] 5. Temporary storage section; 50. Temporary storage box; 51. Second slide rail; 52. Second electric cylinder; 53. Second slider; 54. Support roller; 57. Inlet; 58. Outlet;

[0057] 55. Clamping assembly; 550. Connecting seat; 551. Vertical plate; 552. Third slide groove; 553. Third slider; 554. Third electric cylinder; 555. Fixed roller; 556. Moving roller; 557. Fourth electric cylinder; 558. Slide rail; 559. Slide base;

[0058] 56. Cutting assembly; 560. Support plate; 561. Extension seat; 562. Transmission assembly; 563. Sliding block; 564. Cutter. Detailed Implementation

[0059] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0060] Example 1: This example specifically illustrates the basic structure and working principle of a plastic sheet winding device, specifically:

[0061] like Figures 1-5 As shown, the present invention provides a plastic sheet winding device, including a winding mechanism 2 disposed on one side of the production equipment 1 for packaging plastic sheets. The winding mechanism 2 is used to perform winding and packaging operations on the produced plastic sheets. In this embodiment, the production equipment 1 is an extruder for extruding plastic sheets, which is prior art and will not be described in detail in this embodiment.

[0062] The winding mechanism 2 includes a conveying device 20 disposed on one side of the production equipment 1. The conveying device 20 is used to pull the extruded plastic sheet (hereinafter referred to as material) from the production equipment 1 and convey it to the rear end. At the same time, a frame 21 is disposed on one side of the output end of the conveying device 20. Several transition rollers 22 are rotatably disposed on the frame 21, so that the continuously conveyed material passes around these transition rollers 22 to achieve steering and tension adjustment. A mounting frame 23 is fixedly disposed at the rear end of the frame 21, and a switching part 3 is disposed at the bottom end of the mounting frame 23. The switching part 3 is used for changing rolls.

[0063] The switching unit 3 includes two crossbeams 30 fixedly installed on both sides of the bottom end of the mounting frame 23, and a first base 31 is fixedly installed on one side of the crossbeam 30. A first fixed frame 32 is rotatably installed on the first base 31. A first motor 33 is fixedly installed on one side of the first base 31. The output shaft of the first motor 33 passes through the first base 31 and is fixedly connected to the rotating shaft on the first fixed frame 32. Thus, by starting the first motor 33, the first fixed frame 32 can be driven to rotate 180 degrees.

[0064] Meanwhile, a second motor 34 is fixedly installed at both ends of the first fixed frame 32. The output shaft of the second motor 34 passes through its end and is fixedly connected to a locking rod 35, thereby starting the second motor 34 and driving the locking rod 35 to rotate.

[0065] Correspondingly, a second base (not shown in the figure) is fixedly installed on the crossbeam 30 on the other side, and a second fixed frame (not shown in the figure) is rotatably installed on the second base. At the same time, a hollow positioning rod 38 is slidably installed at each end of the second fixed frame. A fixing ring 37 is sleeved on the positioning rod 38, and a cylinder 36 is fixedly installed at each end of the second fixed frame. The output end of the cylinder 36 passes through the end and is fixedly connected to the corresponding fixing ring 37. Thus, when the cylinder 36 is activated, the positioning rod 38 can be driven to extend or retract along its axial direction.

[0066] Meanwhile, a take-up drum 39 is detachably installed between the opposing clamping rod 35 and the positioning rod 38;

[0067] Specifically, the winding drum 39 has an internal cavity and multiple negative pressure holes 390 for adsorbing materials on its surface. When installed, one end of the winding drum 39 is fitted onto the clamping rod 35 and rotated by the clamping rod 35, while the other end is aligned with the end of the corresponding positioning rod 38. Then, the cylinder 36 is activated to push the positioning rod 38 out and insert it into the inner hole of the other end of the winding drum 39 to form a rotational support.

[0068] After insertion, the hollow positioning rod 38 has its inner hole connected to the inner cavity of the winding drum 39. The tail end of the positioning rod 38 is connected to an external negative pressure source (such as a vacuum pump) through a rotary joint (not shown in the figure), thereby activating the external negative pressure source and achieving negative pressure adsorption operation.

[0069] Thus, when a take-up drum 39 is fully wound, the first motor 33 drives the entire first fixed frame 32 to rotate 180 degrees, moving the fully wound take-up drum 39 out of the winding station, and at the same time, turning the pre-loaded empty take-up drum 39 into the winding station, completing the station switching.

[0070] To facilitate the initial winding process in conjunction with the aforementioned negative pressure adsorption function, such as... Figures 4-6 As shown, a pushing part 4 is provided at one end of the mounting frame 23 near the frame body 21. The pushing part 4 includes brackets 40 fixedly installed on both sides of one end of the mounting frame 23. At the same time, a first sliding groove 41 is provided on each bracket 40. A first slider 42 is slidably installed in the first sliding groove 41, and a pressure roller 43 is rotatably installed between the two first sliders 42. The pressure roller 43 is used to contact the material and gently push it towards the winding drum 39 of the winding station.

[0071] Meanwhile, a first electric cylinder 44 is fixedly installed at one end of the bracket 40. The output end of the first electric cylinder 44 passes through the bracket 40 and is fixedly connected to the first slider 42. When the take-up drum 39 rotates to the winding station, the negative pressure adsorption is activated, and the first electric cylinder 44 is activated at the same time. The first slider 42 is pushed to drive the pressure roller 43 to move along the first slide groove 41, pushing the material head towards and adhering to the surface of the rotating take-up drum 39, thus completing the automatic winding operation.

[0072] In order to cut the material during roll changing, such as Figure 2 and Figure 7 , Figure 9 As shown, a cutting assembly 56 is provided above the winding drum 39 at the winding station on the mounting frame 23. The cutting assembly 56 includes a transmission assembly 562 that spans the width direction of the material. The transmission assembly 562 is a screw drive mechanism applicable to this embodiment in the prior art. The transmission assembly 562 has a sliding block 563 that can reciprocate in a straight line. At the same time, a cutter 564 for cutting the material is fixedly provided on one side of the sliding block 563. When cutting is required, the transmission assembly 562 drives the sliding block 563 to move the cutter 564 laterally along the width direction of the material to achieve a one-time flat cutting operation.

[0073] Under normal winding conditions, the material output from the conveying equipment 20 passes around the transition roller 22 and moves to the position between the pressure roller 43 and the winding drum 39 at the winding station. Then, under the light pressure of the pressure roller 43, it adheres to the surface of the winding drum 39, and the second motor 34 drives the winding drum 39 to rotate for winding.

[0074] When the roll reaches the predetermined length and needs to be changed, firstly, the first electric cylinder 44 retracts, driving the pressure roller 43 away from the take-up drum 39 of the rolling station, so that the pressure roller 43 and the surface of the take-up drum 39 are completely disengaged, so as to make room for subsequent cutting and station switching. Then, the cutter 564 in the cutting assembly 56 is driven by the transmission assembly 562 to cut the material laterally.

[0075] After the material is cut, the first motor 33 starts, driving the first fixed frame 32 and the second fixed frame to rotate 180 degrees together, moving the take-up drum 39 of the winding station out, and transferring the pre-prepared empty take-up drum 39 into the winding station.

[0076] Next, cylinder 36 extends, pushing positioning rod 38 into the center hole of new take-up drum 39, connecting the negative pressure air passage;

[0077] Then, the first electric cylinder 44 extends again, pushing the pressure roller 43 onto the surface of the new take-up drum 39, pressing the material head firmly onto the surface of the take-up drum 39;

[0078] Finally, the second motor 34 starts and rotates at a slow speed to complete the initial winding, and then switches to the normal winding speed.

[0079] Example 2:

[0080] To address the issue of material accumulation and wrinkling during roll change when it cannot be received, and to prevent wrinkling of continuously conveyed material from wrinkling due to downstream clamping stop during roll change and cutting, such as... Figures 1-12 As shown, a temporary storage section 5 is provided above the winding drum 39 at the winding station. This temporary storage section 5 is used to temporarily store materials. Since the temporary storage box 50 is located on the path where the materials naturally hang, the materials can smoothly enter the inlet 57 by their own weight and traction inertia without the need for additional guiding power.

[0081] The temporary storage section 5 includes a temporary storage box 50 fixedly installed on the upper end of the mounting frame 23 and located directly below the frame 21. The upper end of the temporary storage box 50 is provided with an inlet 57 for receiving material introduced from the transition roller 22.

[0082] Furthermore, a discharge port 58 is provided at the bottom of the temporary storage box 50, which is used to discharge the material downward to one side of the winding drum 39 during normal winding for subsequent winding operations.

[0083] Meanwhile, the storage box 50 has an internal cavity for temporarily storing excess material during roll changing. The width of the cavity is slightly larger than the width of the material, and the two side walls provide lateral restraint for the material to prevent it from sliding or overturning during movement.

[0084] In order to clamp the material head during the second roll change, such as Figures 7-11As shown, a clamping component 55 is fixedly installed on the mounting frame 23 at a position directly below the outlet 58 of the temporary storage box 50. The clamping component 55 is used to fix the lower end of the material when changing rolls.

[0085] Specifically, the clamping assembly 55 includes slide rails 558 fixedly mounted on both sides of the mounting frame 23, slide blocks 559 slidably mounted on the slide rails 558, and vertical plates 551 fixedly mounted on each slide block 559. A connecting seat 550 is fixedly connected between the bottom ends of the two sets of vertical plates 551. A fourth electric cylinder 557 is fixedly mounted on both sides of the temporary storage box 50. The output end of the fourth electric cylinder 557 is fixedly connected to the corresponding vertical plate 551. Activating the fourth electric cylinder 557 can push the vertical plate 551 to slide along the slide rails 558, thereby enabling the clamping assembly 55 to clamp below the outlet 58 during the temporary storage stage. During the winding stage, it can carry the clamped material head down to the winding drum 39, realizing the delivery operation of the material head.

[0086] A fixed roller 555 is fixedly installed between the two vertical plates 551 near the connecting seat 550. A third sliding groove 552 is also provided on each of the vertical plates 551. A third slider 553 is slidably installed in the third sliding groove 552. A moving roller 556 is rotatably installed between the two third sliders 553. A third electric cylinder 554 is fixedly installed at one end of the vertical plate 551. The output end of the third electric cylinder 554 passes through the corresponding vertical plate 551 and is fixedly connected to the corresponding third slider 553. When clamping is required, the third electric cylinder 554 is activated, which pushes the moving roller 556 to move along the third sliding groove 552 toward the fixed roller 555, thereby clamping and fixing the material located between the two. The surfaces of the fixed roller 555 and the moving roller 556 are covered with a soft rubber layer to increase friction and prevent damage to the surface of the plastic sheet during clamping.

[0087] It should be noted that in this embodiment, the cutting component 56 is located between the two third sliders 553 at the lower end of the moving roller 556. Specifically, an extension seat 561 is fixedly provided between the two third sliders 553 and below the moving roller 556. The bottom end of the extension seat 561 is fixedly connected to the transmission component 562. At the same time, a support plate 560 is provided at the bottom end of the connecting seat 550 near the fixed roller 555. Thus, the cutting component 56 moves synchronously with the clamping action of the moving roller 556 until the support plate 560 presses the material flat. At this time, the cutter 564 is in the optimal cutting starting position, which can complete the clamping and cutting operation. This avoids the situation where the material head retracts or shifts due to loss of constraint at the moment of cutting, so that the position of the clamped material head remains unchanged, creating a prerequisite for subsequent delivery and adsorption winding.

[0088] When the moving roller 556 moves toward the fixed roller 555 and completes clamping, the two form a mechanical sealing surface directly below the outlet 58, which effectively prevents the material from accidentally slipping or scattering from the outlet 58 during the temporary storage process. At the same time, a predetermined length of suspended material head is naturally retained below the clamping point of the moving roller 556 and the fixed roller 555. This suspended material head is the starting head for docking with the new take-up drum 39 when the secondary winding is performed, ensuring the continuity of the winding change.

[0089] To achieve orderly temporary storage, such as Figures 7-12 As shown, second sliding grooves 51 are respectively provided on two opposite side walls of the temporary storage box 50, and the two second sliding grooves 51 are vertically spaced apart. It should be noted that the two sets of second sliding grooves 51 are arranged in opposite directions. Specifically, as shown... Figures 12-13 As shown, the second chute 51 on one side opens from one end to the other end, and the second chute 51 on the other side opens from the other end to one end, thereby achieving the maximum pushing stroke of the material within a limited space.

[0090] Meanwhile, a second slider 53 is slidably arranged inside each set of second slide grooves 51. The sliding directions of the two second sliders 53 are opposite, and a retaining roller 54 is rotatably arranged at one end of the second slider 53 facing the cavity. The retaining roller 54 is used to contact the material. The retaining roller 54 can rotate freely. When it contacts the material, it forms rolling friction, which effectively avoids scratching or tearing the surface of the plastic sheet during the pushing process.

[0091] Furthermore, a second electric cylinder 52 is fixedly installed on the outside of the temporary storage box 50. The output end of the second electric cylinder 52 passes through the box wall and is fixedly connected to the second slider 53 at the corresponding position. Thus, starting the second electric cylinder 52 can drive the second slider 53 to slide inside the second slide groove 51.

[0092] Therefore, when the material is temporarily stored, when the bottom end of the material is clamped by the clamping component 55, while the top end of the material continues to enter the temporary storage box 50 from the inlet 57, the second electric cylinder 52 on one side is activated first, pushing the corresponding second slider 53 to drive the abutment roller 54 to move along the second slide groove 51, pushing the material to one side inside the temporary storage box 50, so that it is against the inner wall of that side, forming the first bend.

[0093] Next, the second electric cylinder 52 on the other side is activated to push its corresponding support roller 54 to move along the reverse second slide groove 51, pushing the material in the opposite direction and pressing the material against the opposite side wall to form a second bend. This bend is in the opposite direction to the first bend, and the two together form a complete S-shaped unit.

[0094] By activating the two sets of second electric cylinders 52, the two holding rollers 54 can form relative motion in space, pushing the material entering the temporary storage box 50 into a regular S-shape, thus facilitating smooth release in the future.

[0095] It should be noted that during the temporary storage process, since the material is clamped at the clamping component 55, the abutment roller 54 in the temporary storage box 50 only processes the material above, so the force of the pushing action will not be transmitted to the clamping point, thus not pulling on the clamped material head, ensuring the stability of the material head state. In addition, the clamping force of the clamping component 55 is greater than the force of the abutment roller 54 when pushing the material, and there is a free section of material between the clamping point and the lowest abutment roller 54. This free section can absorb small position fluctuations, thereby completely isolating the pushing action from the clamping point.

[0096] During normal winding operations, the material enters the inlet 57 of the temporary storage box 50 from the production equipment 1 via the conveyor 20 and the transition roller 22, and passes directly out from the outlet 58, downward through the clamping assembly 55 which is in the open state, and is finally wound onto the take-up drum 39. At this time, the temporary storage section 5 is in a standby state, and both abutment rollers 54 are retracted to the outermost end of the chute, closely attached to the inner wall of the temporary storage box 50, without contact with the material, and without generating any additional resistance.

[0097] When a roll change is required, the clamping assembly 55 is activated first. The two third electric cylinders 554 extend synchronously, pushing the moving roller 556 to move along the third slide groove 552 toward the fixed roller 555 to clamp the material.

[0098] As the moving roller 556 moves, the cutting assembly 56 fixed on it also moves as a whole until the holding plate 560 is in contact with the back of the material. At this time, the second electric cylinders 52 on both sides of the temporary storage box 50 enter the standby state and are ready to extend and retract.

[0099] Once the clamping is confirmed, the transmission component 562 of the cutting component 56 is immediately activated, driving the sliding block 563 to move the cutter 564 laterally along the plane of the holding plate 560, cutting the material flat. At the moment of cutting, the upstream part of the material is firmly fixed by the clamping component 55, while the downstream tail of the material hangs down naturally and is wound into the full take-up drum 39.

[0100] After the cutting is completed, the upstream extrusion line continues to discharge material. Since the bottom of the material is clamped and cannot go down, the newly delivered material begins to accumulate upward from the outlet 58 at the bottom of the cavity of the temporary storage box 50.

[0101] At this time, according to the preset delay or material level signal, the second electric cylinders 52 on both sides are driven sequentially. First, the second electric cylinder 52 on one side extends and pushes its holding roller 54 to move downward along the inclined second slide 51 to the opposite side, pushing the accumulated material to one side and guiding the material that was originally irregularly arched at the outlet 58 to one side of the inner wall of the temporary storage box 50 in an orderly manner, thus completing the first orderly sorting.

[0102] Once in position, the second electric cylinder 52 on the other side extends and pushes its holding roller 54 to move in the opposite direction along the second slide groove 51, pushing the material in the opposite direction, causing the material to cross the center line and stick to the inner wall on the other side, forming a bend in the opposite direction to the previous section. The holding rollers 54 on both sides move in this way, forcibly pushing the material continuously falling from the inlet 57 into a regular S-shape, so that the material is temporarily stored in the cavity of the temporary storage box 50. Through pushing, the material entering the temporary storage box 50 is pushed into a regular S-shape.

[0103] While the material is temporarily stored, the switching unit 3 performs a roll changing action. The first motor 33 starts and drives the first fixed frame 32 and the second fixed frame to rotate, moving the fully wound take-up drum 39 out of the working position and turning the pre-prepared empty take-up drum 39 into the working position. Then, the cylinder 36 pushes the positioning rod 38 to insert the new take-up drum 39 and connects the negative pressure air circuit. This process is completed synchronously with the material pushing process.

[0104] Once the new take-up drum 39 is in place, as the material continues to be conveyed, the fourth electric cylinder 557 can be activated to move the material head held by the clamping assembly 55 to the position of the new take-up drum 39. Subsequently, the third electric cylinder 554 of the clamping assembly 55 retracts, the moving roller 556 lifts up, and the clamped material head is released. At this time, the material head is in a free state and is closely attached to the adsorption area of ​​the new take-up drum 39.

[0105] Subsequently, the first electric cylinder 44 of the pusher 4 extends and pushes the pressure roller 43 to move towards the new take-up drum 39, gently pressing the material onto the adsorption area on the surface of the take-up drum 39;

[0106] Next, the negative pressure generating device is started, and the take-up drum 39 stably adsorbs the material head through the negative pressure hole 390. After successful winding, the second motor 34 of the new take-up drum 39 is driven to rotate at normal speed to firmly wind the material head and keep the material taut.

[0107] Subsequently, the temporary storage section 5 begins to perform a retraction operation in the reverse order of pushing. The bottommost holding roller 54, driven by its second electric cylinder 52, retracts slowly first, releasing the bottommost section of S-shaped material. Then, the upper holding roller 54 retracts slowly in sequence, releasing the constrained material, until all holding rollers 54 are reset.

[0108] During the process of pushing and releasing the material, the speed of the second motor 34 increases to match the excess material, thereby establishing a stable tension between the material inside the temporary storage box 50 and the winding drum 39, achieving a taut state of the material, and avoiding the problem of material loosening and tangling caused by instantaneous release.

[0109] Once all the temporarily stored material has been released, the speed of the second motor 34 switches to the preset normal winding speed, quickly winding up the material that enters directly from the inlet 57, thereby consuming the remaining material temporarily stored during the roll change in a short time and restoring the production to a high-efficiency state.

[0110] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic sheet winding device, characterized in that: include: Roll forming mechanism (2); A switching unit (3) is provided below the winding mechanism (2); A pushing part (4) is provided on one side of the winding mechanism (2) to push the end of the material toward the winding mechanism (2) to achieve initial winding; A temporary storage section (5) is disposed on the winding mechanism (2) and located above the switching section (3). The temporary storage section (5) includes: A temporary storage box (50) has a cavity, an inlet (57) is provided at the upper end of the temporary storage box (50), and an outlet (58) is provided at the bottom end of the temporary storage box (50). Two second slides (51), one of which is located on one side of the temporary storage box (50) and the other is located on the other side of the temporary storage box (50), and the two second slides (51) are vertically spaced apart. Two second sliders (53) are slidably disposed in the corresponding second slide grooves (51), and the second sliders (53) are provided with a retaining roller (54) on the side of the second slider (53) facing the inside of the temporary storage box (50). Two second electric cylinders (52) are mounted on the temporary storage box (50), and the output end of the second electric cylinder (52) is fixedly connected to the corresponding second slider (53); During roll changing, the second electric cylinder (52) drives the corresponding second slider (53) and the abutment roller (54) on it to slide along the corresponding second slide groove (51), wherein the two second sliders (53) and the abutment roller (54) on them slide vertically from bottom to top in sequence, and the sliding directions are opposite to push the material entering the temporary storage box (50) into an S-shaped state.

2. The plastic sheet winding device according to claim 1, characterized in that: The winding mechanism (2) includes a frame (21), on which a transition roller (22) is rotatably mounted, and at the other end of the frame (21) a mounting frame (23) is fixedly mounted.

3. The plastic sheet winding device according to claim 2, characterized in that: The switching part (3) includes two crossbeams (30) fixedly disposed on both sides of the bottom end of the mounting frame (23), and a first base (31) is fixedly disposed on one side of the crossbeam (30). A first fixing frame (32) is rotatably disposed on the first base (31). A first motor (33) is fixedly disposed on one side of the first base (31). The output shaft of the first motor (33) passes through the first base (31) and is fixedly connected to the first fixing frame (32).

4. A plastic sheet winding device according to claim 3, characterized in that: The first fixing frame (32) has a second motor (34) fixedly installed on both ends. The output shaft of the second motor (34) passes through its end and is fixedly connected to a clamp (35).

5. A plastic sheet winding device according to claim 4, characterized in that: A second base is fixedly installed on the crossbeam (30) on the other side. A second fixed frame is rotatably installed on the second base. A hollow positioning rod (38) is slidably installed at each end of the second fixed frame. A fixing ring (37) is sleeved on the positioning rod (38). A cylinder (36) is fixedly installed at each end of the second fixed frame. The output end of the cylinder (36) passes through the end and is fixedly connected to the corresponding fixing ring (37).

6. A plastic sheet winding device according to claim 5, characterized in that: A take-up drum (39) is provided between the clamping rod (35) and the positioning rod (38). The take-up drum (39) has an inner cavity and multiple sets of negative pressure holes (390) are opened on the surface of the take-up drum (39). One end of the positioning rod (38) is used to connect to an external negative pressure source, and the other end is used to insert into the inside of the take-up drum (39) to form a negative pressure inside the take-up drum (39).

7. A plastic sheet winding device according to claim 6, characterized in that: The pushing part (4) includes brackets (40) fixedly installed on both sides of one end of the mounting frame (23). Each bracket (40) has a first sliding groove (41) provided on it. A first slider (42) is slidably arranged in the first sliding groove (41). A pressure roller (43) is rotatably arranged between the first sliders (42).

8. A plastic sheet winding device according to claim 7, characterized in that: A first electric cylinder (44) is fixedly installed at one end of the bracket (40). The output end of the first electric cylinder (44) passes through the bracket (40) and is fixedly connected to the first slider (42).

9. A plastic sheet winding device according to claim 8, characterized in that: A clamping assembly (55) is provided below the outlet (58) of the temporary storage section (5), and the clamping assembly (55) includes: Slide rails (558) are provided on both sides of the mounting bracket (23); A slide (559) is mounted on the slide rail (558); A vertical plate (551) is mounted on the slide (559); A connecting seat (550) is fixedly disposed between the bottom ends of the two vertical plates (551); The fourth electric cylinder (557) is disposed on both sides of the temporary storage box (50), and the output end of the fourth electric cylinder (557) is fixedly connected to the vertical plate (551). Fixed roller (555) is fixedly disposed between the vertical plates (551) and close to the connecting seat (550); The moving roller (556) has its two ends slidably disposed in the third groove (552) on the vertical plate (551) via the third slider (553); The third electric cylinder (554) is mounted on the vertical plate (551) and its output end is connected to the third slider (553) to drive the moving roller (556) to move closer to or away from the fixed roller (555).

10. A plastic sheet winding device according to claim 9, characterized in that: The mounting bracket (23) is provided with a cutting assembly (56), the cutting assembly (56) comprising: An extension seat (561) is fixedly mounted on the third slider (553) and located below the moving roller (556); A transmission assembly (562) is disposed on the extension seat (561) and has a sliding block (563) capable of linear reciprocating motion. A cutter (564) is disposed on the sliding block (563) for cutting materials; A retaining plate (560) is disposed on the connecting seat (550) and located below the fixed roller (555) for holding the material against it during cutting.

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