Winding and unwinding machine for polyurethane foam production

Abstract

The invention relates to the technical field of polyurethane foam production, in particular to a winding and unwinding machine for polyurethane foam production. A driving assembly is connected to the workbench and connected with the first connecting plate. The driving assembly is used for driving the first connecting plate to move up and down. A plurality of round rods I are connected to each connecting plate I in a sliding manner; the opposite sides of the two first connecting plates are each provided with a pressing plate, and the pressing plates are fixedly connected with the corresponding first round rods. According to the winding and unwinding machine, the first foam roll and the second foam roll can be automatically replaced, thick rubber sheets can be bonded to the upper sides and the lower sides of the first foam roll and the second foam roll in the replacement process, the connection stability can be improved, meanwhile, a plurality of pits are formed in the thick rubber sheets through the second round rods, the pits are sunken into the first foam roll and the second foam roll, and the foam roll is prevented from falling into the first foam roll and the second foam roll. And the pulling force is resisted through the adhesion force of the thick rubber sheet glue layer and the blocking force of the thick rubber sheet pit, so that the falling phenomenon is effectively avoided.

Description

Technical Field

[0001] This invention relates to the technical field of polyurethane foam production. More specifically, this invention relates to a winding and unwinding machine for polyurethane foam production. Background Technology

[0002] In the production of polyurethane foam, a winding and unwinding machine is required to wind and unwind the polyurethane foam. When a single roll of polyurethane foam is used up, it needs to be replaced manually. Disassembly and installation both consume a lot of time, resulting in long downtime and extending the production process. Therefore, the existing technology proposes a winding and unwinding machine that can automatically replace polyurethane foam rolls. Two rolls of polyurethane foam are pre-installed on the winding and unwinding machine. When one roll of polyurethane foam is used up, the winding and unwinding machine can automatically switch to the other roll of polyurethane foam. Then, the used polyurethane foam roll can be replaced manually, which can significantly reduce downtime and improve efficiency. When switching from a conventional winding and unwinding machine to a polyurethane foam roll, the existing polyurethane foam roll is cut, and then a thick adhesive sheet is used to bond the end of a spare polyurethane foam roll to the cut polyurethane foam. The winding and unwinding machine moves the cut polyurethane foam, which in turn moves the spare polyurethane foam roll via the thick adhesive sheet, thus completing the switching operation. However, the conventional winding and unwinding machine only bonds the polyurethane foam from the top, resulting in low bonding stability. If the winding force is too high, the thick adhesive sheet may detach, leading to winding and unwinding failure.

[0003] In summary, this application proposes a winding and unwinding machine for polyurethane foam production, which improves the aforementioned technical problems. Summary of the Invention

[0004] To overcome the drawbacks of low bonding stability and risk of detachment when polyurethane foam is connected solely by adhesive film, this invention provides a winding and unwinding machine for polyurethane foam production.

[0005] The technical solution of the present invention is as follows: a winding and unwinding machine for polyurethane foam production, comprising a worktable and two connecting plates mounted on the worktable; the two connecting plates are connected to the worktable; a round rod is also included; a drive assembly is connected to the worktable and is connected to the connecting plates; the drive assembly is used to drive the connecting plates to move up and down; the drive assembly is also used to drive the connecting plates to move back and forth; a plurality of round rods are slidably connected to each connecting plate; a pressure plate is provided on the opposing sides of the two connecting plates, and the pressure plate is fixedly connected to the corresponding round rod; each round rod has a... A spring is fitted on the device, with one end of the spring fixedly connected to a corresponding connecting plate and the other end fixedly connected to a corresponding pressure plate. Several pipes are threaded through each pressure plate. Several grooves are formed on each pressure plate, communicating with the corresponding pipes. Several round rods are fixedly connected to each connecting plate, and these rods are slidably connected to the corresponding connecting plate. The round rods have a heating function. A winding and unwinding assembly is connected to the worktable, which drives the movement of foam rolls one and two. A cutting assembly is also connected to the worktable, used to cut the foam rolls one and two.

[0006] More preferably, the take-up and unwinding assembly includes electric roller 1, electric roller 2, electric roller 3, electric roller 4, electric roller 5, electric roller 6, electric roller 7, connecting plate 2, electric roller 8, connecting plate 3, motor 1, connecting block 1, pressure rod, motor 2, movable plate, and lifting unit; electric roller 1 is rotatably connected to the worktable; electric roller 2 is rotatably connected to the worktable; electric roller 3 is connected to the worktable; electric roller 4 is rotatably connected to the worktable; electric roller 5 is rotatably connected to the worktable; electric roller 6 is rotatably connected to the worktable; electric roller 7 is rotatably connected to the worktable; and the lifting unit is connected to the worktable. A second connecting plate is attached; a lifting unit is used to drive the second connecting plate to move up and down; an electric roller three is rotatably connected to the second connecting plate; an electric roller eight is rotatably connected to the second connecting plate; two third connecting plates are fixedly attached to the second connecting plate; a third connecting plate is also connected to the worktable; several motors one are fixedly attached to each third connecting plate; a connecting block one is fixedly attached to the output end of each motor one; a pressure rod is set above each third connecting plate, and the pressure rod is fixedly connected to the corresponding connecting block one; several motors two are fixedly attached to each third connecting plate; a movable plate is rotatably connected to each third connecting plate, and the movable plate is fixedly connected to the output end of the corresponding motor two.

[0007] More preferably, the cutting assembly includes a multi-stage hydraulic telescopic rod and a cutter; the multi-stage hydraulic telescopic rod is fixedly mounted on the worktable; and the cutter is fixedly mounted on the telescopic end of the multi-stage hydraulic telescopic rod.

[0008] More preferably, the drive assembly includes an electric slide rail, an electric slider, and a telescopic cylinder; several electric slide rails are fixedly connected to the worktable; an electric slider is slidably connected to each electric slide rail; and a telescopic cylinder is fixedly connected to each electric slider, with the telescopic end of the telescopic cylinder fixedly connected to the corresponding connecting plate.

[0009] More preferably, it also includes a limiting strip; a limiting strip is fixed to the end of each pressure plate.

[0010] More preferably, it also includes heating rings; several heating rings are fixedly attached to each pressure plate, and the heating rings are aligned with the corresponding round rods.

[0011] More preferably, it also includes an anti-displacement component, which includes a second pipe and a soft rubber ring; the second round rod is set as a hollow structure; each second round rod is connected to the second pipe; each second round rod is fixedly connected to a soft rubber ring; each second round rod has a round hole, and the round hole is aligned with the corresponding soft rubber ring.

[0012] More preferably, it also includes a partition; a partition is fixed to the inner side of each of the two round rods; the partition divides the inner side of the two round rods into a U-shaped channel.

[0013] More preferably, it also includes fins; several fins are fixed to the inner side of each round rod.

[0014] More preferably, it also includes auxiliary components, which include electric roller nine, connecting block two, electric roller ten, electric slide rail three, and electric slider three; several electric roller nine are rotatably connected to the worktable; several electric slide rail three are fixedly connected to the worktable; an electric slider three is slidably connected to each electric slide rail three; all electric slider three are fixedly connected to the connecting block two; several electric roller ten are rotatably connected to the connecting block two.

[0015] Beneficial effects: 1. This winding and unwinding machine can automatically replace foam roll one and foam roll two. During the replacement process, thick film can be glued to both the upper and lower sides of foam roll one and foam roll two, which helps to improve the connection stability. At the same time, the round rod two forms several pits on the thick film, and the pits sink into the foam roll one and foam roll two. The adhesive force of the thick film layer and the blocking force of the thick film pits work together to resist the pulling force, effectively preventing the phenomenon of falling off. Second, the pressure plate is blocked and limited by the limiting strip to prevent the pressure plate from flattening foam roll one and foam roll two, so that the pit of the thick film can fully sink into foam roll one and foam roll two, thereby improving the fixing effect of foam roll one and foam roll two. Third, by replacing the round rod with a heating ring, the heating ring softens the outer edge of the thick film to be extruded, so that the tip of the round rod can contact the hard thick film during the extrusion process without puncture. This allows for the stable formation of a pit to fix foam roll one and foam roll two, which helps to ensure connection stability. Fourth, during the extrusion process, the thick rubber sheet is held tightly by the soft rubber ring, thus avoiding slippage and allowing the softened area of ​​the thick rubber sheet to deform evenly. This ensures the structural stability of the recess and thus ensures the fixing effect of foam roll one and foam roll two. At the same time, the second pipe used to hold and fix the thick rubber sheet can also be used to cool the recess of the thick rubber sheet, making it harden quickly and improving efficiency. In addition, the fins on the inner side of the round rod two can increase the heat exchange area, thereby improving the cooling effect of the thick rubber sheet recess. Fifth, by using electric rollers nine and ten in combination to buffer foam roll one, electric roller five can continuously rewind the buffered foam roll one during the switching between foam roll one and foam roll two, without pausing the rewinding operation, which helps to ensure the orderly progress of subsequent processes. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the unwinding and winding machine for polyurethane foam production according to the present invention is shown. Figure 2 The diagram shows the structural schematics of foam roll one and foam roll two; Figure 3 A schematic diagram of the structure of the unwinding and rewinding assembly of the present invention is shown; Figure 4 The present invention is shown. Figure 3 Enlarged view of point A in the middle; Figure 5 A schematic diagram of the structure of the driving component of the present invention is shown; Figure 6 A schematic diagram of the structure of the pipe of the present invention is shown; Figure 7 A schematic diagram of the anti-offset component of the present invention is shown; Figure 8 A schematic diagram of the structure of the fin of the present invention is shown.

[0017] The diagram is labeled as follows: 1-Workbench, 2-Connecting Plate 1, 3-Round Rod 1, 4-Pressure Plate, 5-Spring, 6-Pipe 1, 7-Round Rod 2, 8-Foam Roll 1, 9-Foam Roll 2, 201-Electric Roll 1, 202-Electric Roll 2, 203-Electric Roll 3, 204-Electric Roll 4, 205-Electric Roll 5, 206-Electric Roll 6, 207-Electric Roll 7, 208-Connecting Plate 2, 209-Electric Roll 8, 2010-Connecting Plate 3, 2011-Motor 1, 2012-Connecting Block 1, 2013-Pressure Rod, 2014-Motor 2, 2015-Lever Moving plate, 2016-Multi-stage hydraulic telescopic rod, 2017-Cutter, 2018-Electric slide rail one, 2019-Electric slider one, 2020-Telescopic cylinder, 2021-Electric slide rail two, 2022-Electric slider two, 2023-Heating ring, 2024-Pipe two, 2025-Soft rubber ring, 2026-Spacer block, 2027-Fin, 2028-Electric roller nine, 2029-Connecting block two, 2030-Electric roller ten, 2031-Electric slide rail three, 2032-Electric slider three, 2033-Limiting strip, 91-Groove, 92-Round hole. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention. Example 1

[0019] A winding and unwinding machine for polyurethane foam production, such as Figures 1-8 As shown, it includes a worktable 1 and connecting plates 2; two connecting plates 2 are connected to the worktable 1; it also includes round rods 3, pressure plates 4, springs 5, pipes 6, round rods 7, a winding / unwinding assembly, a cutting assembly, and a drive assembly; the drive assembly is connected to the worktable 1 and is connected to the connecting plates 2; the drive assembly is used to drive the connecting plates 2 to move up and down and back and forth; four round rods 3 are slidably connected to each connecting plate 2; a pressure plate is provided on each of the opposing sides of the two connecting plates 2. 4. The pressure plate 4 is fixedly connected to the corresponding round rod 3; four springs 5 ​​are fixedly connected between each connecting plate 2 and the corresponding pressure plate 4; four pipes 6 are passed through each pressure plate 4; four grooves 91 are opened on each pressure plate 4, and the grooves 91 are connected to the corresponding pipes 6; several round rods 7 are fixedly connected to each connecting plate 2, and the round rods 7 are slidably connected to the corresponding connecting plate 2; the round rods 7 have a heating function; a winding and unwinding assembly is connected to the worktable 1; a cutting assembly is connected to the worktable 1.

[0020] The unwinding and rewinding assembly includes electric roller 1 (201), electric roller 2 (202), electric roller 3 (203), electric roller 4 (204), electric roller 5 (205), electric roller 6 (206), electric roller 7 (207), connecting plate 2 (208), electric roller 8 (209), connecting plate 3 (2010), motor 1 (2011), connecting block 1 (2012), pressure rod 2013, motor 2 (2014), movable plate 2015, and a lifting unit. Electric roller 1 (201), electric roller 2 (202), electric roller 3 (203), electric roller 4 (204), electric roller 5 (205), electric roller 6 (206), and electric roller 7 (207) are rotatably connected to the upper part of the worktable 1. A lifting unit is connected to the worktable 1, and connecting plate 2 (208) is connected to the lifting unit. Connecting plate 208 is made of alloy material; electric roller 3 203 is rotatably connected to connecting plate 208; electric roller 8 209 is rotatably connected to connecting plate 208; two connecting plates 3 2010 are welded to connecting plate 208; a connecting plate 3 2010 is also connected to workbench 1; two motors 1 2011 are fixedly connected to each connecting plate 3 2010; a connecting block 1 2012 is fixedly connected to the output end of each motor 1 2011; a pressure rod 2013 is set above each connecting plate 3 2010, and the pressure rod 2013 is fixedly connected to the corresponding connecting block 1 2012; two motors 2 2014 are fixedly connected to each connecting plate 3 2010; a movable plate 2015 is rotatably connected to each connecting plate 3 2010, and the movable plate 2015 is fixedly connected to the output end of the corresponding motor 2 2014, and the motor 2 2014 drives the movable plate 2015 to rotate.

[0021] The cutting assembly includes a multi-stage hydraulic telescopic rod 2016 and a cutter 2017; the upper part of the worktable 1 is bolted to the multi-stage hydraulic telescopic rod 2016; the movable end of the multi-stage hydraulic telescopic rod 2016 is fixedly connected to the cutter 2017, which cuts the foam roll 8 or the foam roll 9.

[0022] The drive assembly includes an electric slide rail 2018, an electric slider 2019, and a telescopic cylinder 2020. Two electric slide rails 2018 are bolted to the worktable 1. An electric slider 2019 is slidably connected to each electric slide rail 2018. A telescopic cylinder 2020 is fixedly connected to each electric slider 2019. The movable end of the telescopic cylinder 2020 is fixedly connected to the corresponding connecting plate 2. The telescopic cylinder 2020 drives the connecting plate 2 to move up and down.

[0023] First, an external air pump is manually connected to pipe 6. Then, the non-adhesive side of the external thick adhesive sheet is attached to the pressure plate 4. The external air pump draws air into pipe 6, creating a negative pressure in groove 91, which in turn holds the thick adhesive sheet firmly onto the pressure plate 4. During operation, electric roller 5 205 winds up foam roll 8, and electric roller 1 201 unwinds foam roll 8, causing it to move to the right. During this process, electric rollers 202, 303, and 404 are rotated to move synchronously with foam roll 8. At this time, an external die-cutting mechanism can be used to die-cut the foam roll 8 moving to the right. Electric roller 5 205 winds up the die-cut foam roll 8 waste, completing the basic winding and unwinding operations.

[0024] When foam roll 8 is about to run out, electric rollers 201 and 205 stop rotating, stopping foam roll 8. The circular rod 7 heats to a high temperature, activating the two upper motors 2011. Motors 2011 drive connecting block 2012 to rotate, which in turn drives pressure rod 2013 in a circular motion. This causes the two pressure rods 2013 to simultaneously press foam roll 8 against the corresponding connecting plate 2010. Then, the multi-stage hydraulic telescopic rod 2016 drives the cutter 2017 forward, cutting foam roll 8. Foam roll 8 on electric roller 201 is designated as the left foam roll 8, and foam roll 8 on electric roller 205 is designated as the right foam roll 8. At this point, the ends of the left foam roll 1 (8), the right foam roll 1 (8), and the second foam roll 2 (9) are all clamped by the corresponding connecting plate 3 (2010) and pressure rod 2013. Then, the electric slide rail 2 (2021) and the electric slider 2 (2022) are activated. The electric slider 2 (2022) drives the connecting plate 2 (208) to move upward. The two connecting plates 3 (2010) to the left of the connecting plate 2 (208) and their parts move upward, thereby causing the left foam roll 1 (8) to move upward away from the right foam roll 1 (8). At the same time, it causes the second foam roll 2 (9) to move upward and align with the right foam roll 1 (8). The two motors 2 (2014) located below are activated. The motors 2 (2014) drive the movable plate 2015 to rotate, so that the two movable plates 2015 located below rotate to below the corresponding connecting plate 3 (3010). This exposes both ends of foam roll 2 (9) and right foam roll 1 (8). Then, the electric slide rail 1 (2018) and electric slider 1 (2019) are activated. The electric slider 1 (2019) drives the telescopic cylinder 2020 forward, which in turn moves the components on it forward. The junction between the ends of foam roll 2 (9) and right foam roll 1 (8) is designated as the bonding area. The two pressure plates 4 move to the upper and lower sides of the bonding area, respectively. The two pressure plates 4 then move the thick adhesive sheets to the upper and lower sides of the bonding area. The telescopic cylinder 2020 then moves the connecting plate 1 (2) and its components, causing the pressure plates 4 to attach the two thick adhesive sheets to the upper and lower sides of the bonding area, thus fixing the ends of foam roll 2 (9) and right foam roll 1 (8) together. The air cylinder 2020 drives the connecting plate 2 to continue moving. At this time, the pressure plate 4 is blocked and cannot move further, causing the connecting plate 2 to slide on the round rod 3 and compress the spring 5. The connecting plate 2 drives the round rod 7 to move towards the thick film, so that the hot round rod 7 contacts the thick film. The thick film softens after being heated. Since the foam roll 8 has a certain thickness and soft texture, the round rod 7 continues to move and squeezes the thick film, thereby squeezing out several pits into the thick film. These pits will sink into the left foam roll 8 and the second foam roll 9. The round rod 7 stops heating, allowing the pits to cool and harden, which helps to increase the connection stability. Then, the external air pump stops sucking air into the pipe 6, allowing the groove 91 to return to normal pressure, thereby stopping the thick film from being tightly sucked.Then, the electric slider 2019 and telescopic cylinder 2020 drive the connecting plate 2 and its parts to move upward back to their original positions. Electric rollers 205 and 206 are then activated. Electric roller 205 winds up the right foam roll 8, and electric roller 206 unwinds the foam roll 9. This causes the right foam roll 8 to move to the right via the thick film, completing the automatic switching operation. During this process, not only can the adhesive force of the thick film counteract the pulling force between the right foam roll 8 and the foam roll 9, but the blocking force between the recesses in the thick film and the right foam roll 8 and the foam roll 9 also counteracts the pulling force, effectively preventing detachment. Electric rollers 207 and 206 are then activated. The mechanism 8209 synchronizes the movement of electric rollers 7207 and 8209 with foam roll 29. Then, the left foam roll 18 is manually removed from electric roller 1201, and a new foam roll 18 is installed on electric roller 1201 for later use. During operation, this winding and unwinding machine can automatically replace foam roll 18 and foam roll 29. During replacement, thick adhesive sheets are bonded to both the top and bottom sides of foam roll 18 and foam roll 29, improving connection stability. Simultaneously, the round rod 27 creates several indentations on the thick adhesive sheets, which then sink into the foam roll 18 and foam roll 29. The adhesive force of the thick adhesive sheet and the resisting force of the indentations work together to counteract the pulling force, effectively preventing detachment.

[0025] The lifting unit includes an electric slide rail 2021 and an electric slider 2022; the electric slide rail 2021 is bolted to the worktable 1; the electric slider 2022 is slidably connected to the electric slide rail 2021, and the electric slider 2022 is fixedly connected to the connecting plate 208. The connecting plate 208 is moved up and down by the electric slider 2022.

[0026] It also includes a limit strip 2033; a limit strip 2033 is fixedly attached to each end of each pressure plate 4.

[0027] During the bonding process, the two pressure plates 4 move towards each other, squeezing foam roll 8 and foam roll 9, which flattens them. This limits the distance the end of the round rod 7 can move into foam roll 8 and foam roll 9, resulting in a relatively low indentation on the thick film and poor fixing effect. Therefore, a limiting strip 2033 is set at the end of the pressure plate 4, extending beyond the edge of foam roll 8 and foam roll 9. After the pressure plates 4 move towards each other and bond the thick film to foam roll 8 and foam roll 9, the two adjacent limiting strips 2033 come into contact. Then, the telescopic cylinder 2020 drives the connecting plate 2 and its parts to continue moving, while the pressure plate 4 is stopped by the limiting strips 2033. 033 prevents further movement, causing connecting plate 12 to slide on round rod 13 and compress spring 5. Connecting plate 12 drives round rod 27 to squeeze the thick film. During this process, pressure plate 4 is blocked by limiting strip 2033 and will not flatten foam roll 18 and foam roll 29, thus allowing round rod 27 to fully squeeze the thick film, making its indentation sink deep into foam roll 18 and foam roll 29, which helps improve connection stability. In use, limiting strip 2033 blocks and limits pressure plate 4 to prevent pressure plate 4 from flattening foam roll 18 and foam roll 29, so that the indentation of the thick film can fully sink into foam roll 18 and foam roll 29, improving the fixing effect of foam roll 18 and foam roll 29.

[0028] It also includes heating rings 2023; several heating rings 2023 aligned with the round rod 7 are fixedly attached to each pressure plate 4.

[0029] During the compression of the thick film by the round rod 7, the tip of the round rod 7 can easily puncture the softened thick film, resulting in a low indentation height and reduced fixation effect. Therefore, a heating ring 2023 is added to the pressure plate 4. After the thick film is attached to foam roll 8 and foam roll 9, the heating ring 2023 heats and softens the outer edge of the area to be compressed, while the round rod 7 stops heating, keeping the area to be compressed in a hard state. Then, the round rod 7 is used to compress the thick film. During this process, the round rod 7... 7. The tip of the rod contacts the rigid thick film without puncture, thus allowing for stable extrusion of the indentation to fix foam roll 8 and foam roll 9. During use, the heating ring 2023 replaces the round rod 7 for heating, softening the outer edge of the thick film to be extruded. This ensures that the tip of the round rod 7 contacts the rigid thick film during extrusion without puncture, allowing for stable indentation to fix foam roll 8 and foam roll 9, which helps ensure connection stability.

[0030] It also includes an anti-displacement component, which includes a pipe 2024 and a soft rubber ring 2025; the round rod 7 is set as a hollow structure; a pipe 2024 is fixedly connected to each round rod 7; a soft rubber ring 2025 is fixedly connected to each round rod 7; a round hole 92 is opened on each round rod 7, and the round hole 92 is aligned with the corresponding soft rubber ring 2025.

[0031] After the heating ring 2023 softens the outer edge of the thick rubber sheet to be extruded, when the thick rubber sheet is extruded by the round rod 7, slippage may occur between the round rod 7 and the thick rubber sheet. This results in the softened part of the thick rubber sheet not being stretched evenly, leading to low structural stability. Therefore, a soft rubber ring 2025 is installed on the round rod 7. First, an external air pump is manually connected to pipe 2024. After the thick rubber sheet is clamped onto the pressure plate 4, the pressure plate 4 and the soft rubber ring 2025 are in close contact. Air is drawn into pipe 2024 by the external air pump. The inner space of the soft rubber ring 2025 is connected to the inner space of the round rod 7 through the round hole 92, thus clamping the soft rubber ring 2025 onto the thick rubber sheet. The round rod 7 then presses the thick rubber sheet. During the extrusion process, the thick film is held firmly by the soft rubber ring 2025, preventing slippage. This allows the hard part of the thick film corresponding to the second round rod 7 to move downwards stably, ensuring uniform deformation of the softened area of ​​the thick film and thus guaranteeing the structural stability of the recess. Afterwards, an external air pump supplies air to the second pipe 2024, restoring the inner side of the second round rod 7 to normal pressure, causing the soft rubber ring 2025 to stop holding the thick film. In use, the soft rubber ring 2025 holds the thick film firmly during extrusion, preventing slippage and ensuring uniform deformation of the softened area, thus guaranteeing the structural stability of the recess and ensuring effective fixation of foam roll 8 and foam roll 9.

[0032] It also includes a partition 2026; a partition 2026 is fixedly connected to the middle of the inner side of each round rod 2 7. The partition 2026 can be made of metal or plastic; the partition 2026 divides the inner side of the round rod 2 7 into a U-shaped channel.

[0033] The inner side of the round rod 7 is divided into U-shaped channels by the partition block 2026. After extrusion, an external air pump supplies air to one of the pipes 2024 and draws air from the other pipe 2024, causing air to flow in the U-shaped channels. This cools the round rod 7 and thus cools the pits of the thick film, allowing it to harden quickly and improving efficiency. In use, the pipe 2024, which is used to clamp and fix the thick film, can also be used to cool the pits of the thick film, allowing it to harden quickly and improving efficiency.

[0034] It also includes fins 2027; several fins 2027 are fixed to the inner side of each round rod 27, which helps to increase the heat exchange area.

[0035] Fins 2027 are installed on the inner side of the round rod 2 7 to increase the heat exchange area, thereby improving the cooling effect on the thick film pit. Example 2

[0036] Based on Example 1, such as Figure 3 As shown, it also includes auxiliary components, including electric roller nine 2028, connecting block two 2029, electric roller ten 2030, electric slide rail three 2031, and electric slider three 2032; four electric roller nine 2028 are rotatably connected to the upper part of the worktable 1; two electric slide rails three 2031 are bolted to the upper part of the worktable 1; one electric slider three 2032 is slidably connected to each electric slide rail three 2031; all electric sliders three 2032 are fixedly connected to the connecting block two 2029, which is made of metal; three electric roller ten 2030 are rotatably connected to the connecting block two 2029.

[0037] During the replacement of foam roll 1 (8) and foam roll 2 (9), the electric roller 5 (205) needs to pause its winding operation, which also requires pausing the die-cutting operation. Therefore, an auxiliary component is installed on the worktable 1. During replacement, the end of the right foam roll 1 (8) is pressed tightly by the connecting plate 3 (2010) and the pressure rod 2013, while the electric roller 5 (205) continues its winding operation. During this process, the electric slide rail 3 (2031) and the electric slider 3 (2032) are activated. The electric slider 3 (2032) drives the connecting block 2 (2029) to move upward, which in turn drives the electric roller 10 (2030) to move upward, shortening the distance between the electric roller 10 (2030) and the electric roller 9 (2028). This shortens the length of the right foam roll 1 (8) wound between the connecting block 2 (2029) and the electric roller 10 (2030). The electric roller 5 (205) continues to press the foam roll 1 (8) against the electric roller 9 (2028). The rewinding process keeps the right foam roll 8 taut at all times. After replacement, the electric roller 6 206 appropriately increases the unwinding speed, while the electric slider 3 2032 controls the electric roller 10 2030 to move downwards, increasing the distance between the electric roller 10 2030 and the electric roller 9 2028. When the electric roller 9 2028 reaches its lowest point, the unwinding speed of the electric roller 6 206 is reduced, allowing the electric roller 6 206 and the electric roller 5 205 to rotate synchronously, completing the reset operation. In use, the electric rollers 9 2028 and 10 2030 work together to buffer the foam roll 8, allowing the electric roller 5 205 to continuously rewind the buffered foam roll 8 during the switching between foam roll 8 and foam roll 2 9 without pausing the rewinding operation, which helps ensure the orderly progress of subsequent processes.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A winding and unwinding machine for polyurethane foam production, comprising a worktable (1) and two connecting plates (2) mounted on the worktable (1); the two connecting plates (2) are connected to the worktable (1); characterized in that: It also includes a round rod (3); a drive assembly is connected to the workbench (1), and the drive assembly is connected to the connecting plate (2); the drive assembly is used to drive the connecting plate (2) to move up and down; the drive assembly is also used to drive the connecting plate (2) to move back and forth; several round rods (3) are slidably connected to each connecting plate (2); a pressure plate (4) is provided on the opposite side of the two connecting plates (2), and the pressure plate (4) is fixedly connected to the corresponding round rod (3); a spring (5) is sleeved on each round rod (3), one end of the spring (5) is fixedly connected to the corresponding connecting plate (2), and the other end of the spring (5) is fixedly connected to the corresponding pressure plate. (4) Fixed connection; several pipes (6) are provided on each pressure plate (4); several grooves (91) are provided on each pressure plate (4), and the grooves (91) are connected to the corresponding pipes (6); several round rods (7) are fixed on each connecting plate (2), and the round rods (7) are slidably connected to the corresponding connecting plate (2); the round rods (7) have a heating function; a winding and unwinding assembly is connected to the workbench (1), which is used to drive the foam roll (8) and foam roll (9) to move; a cutting assembly is connected to the workbench (1), which is used to cut the foam roll (8) and foam roll (9).

2. The winding and unwinding machine for polyurethane foam production according to claim 1, characterized in that: The take-up and unwinding assembly includes electric roller one (201), electric roller two (202), electric roller three (203), electric roller four (204), electric roller five (205), electric roller six (206), electric roller seven (207), connecting plate two (208), electric roller eight (209), connecting plate three (2010), motor one (2011), connecting block one (2012), pressure rod (2013), motor two (2014), movable plate (2015), and lifting unit; worktable (1 Electric roller 1 (201) is rotatably connected to the worktable (1); electric roller 2 (202) is rotatably connected to the worktable (1); electric roller 3 (203) is connected to the worktable (1); electric roller 4 (204) is rotatably connected to the worktable (1); electric roller 5 (205) is rotatably connected to the worktable (1); electric roller 6 (206) is rotatably connected to the worktable (1); electric roller 7 (207) is rotatably connected to the worktable (1); a lifting unit is connected to the worktable (1); the lifting unit is connected to... There is a connecting plate two (208); the lifting unit is used to drive the connecting plate two (208) to move up and down; the electric roller three (203) is rotatably connected to the connecting plate two (208); the electric roller eight (209) is rotatably connected to the connecting plate two (208); two connecting plates three (2010) are fixedly connected to the connecting plate two (208); a connecting plate three (2010) is also connected to the worktable (1); several motors one (2011) are fixedly connected to each connecting plate three (2010); each motor one (2011) Each output end is fixedly connected to a connecting block 1 (2012); each connecting plate 3 (2010) is provided with a pressure rod (2013) above it, and the pressure rod (2013) is fixedly connected to the corresponding connecting block 1 (2012); each connecting plate 3 (2010) is fixedly connected to several motors 2 (2014); each connecting plate 3 (2010) is rotatably connected to a movable plate (2015), and the movable plate (2015) is fixedly connected to the output end of the corresponding motor 2 (2014).

3. A winding and unwinding machine for polyurethane foam production according to claim 2, characterized in that: The cutting assembly includes a multi-stage hydraulic telescopic rod (2016) and a cutter (2017); the multi-stage hydraulic telescopic rod (2016) is fixedly mounted on the worktable (1); the cutter (2017) is fixedly mounted on the telescopic end of the multi-stage hydraulic telescopic rod (2016).

4. A winding and unwinding machine for polyurethane foam production according to claim 3, characterized in that: The drive assembly includes an electric slide rail (2018), an electric slider (2019), and a telescopic cylinder (2020); several electric slide rails (2018) are fixedly connected to the worktable (1); an electric slider (2019) is slidably connected to each electric slide rail (2018); a telescopic cylinder (2020) is fixedly connected to each electric slider (2019), and the telescopic end of the telescopic cylinder (2020) is fixedly connected to the corresponding connecting plate (2).

5. A winding and unwinding machine for polyurethane foam production according to claim 3, characterized in that: It also includes a limiting strip (2033); a limiting strip (2033) is fixed to the end of each pressure plate (4).

6. A winding and unwinding machine for polyurethane foam production according to claim 5, characterized in that: It also includes heating rings (2023); several heating rings (2023) are fixed on each pressure plate (4), and the heating rings (2023) are aligned with the corresponding round rods (7).

7. A winding and unwinding machine for polyurethane foam production according to claim 6, characterized in that: It also includes an anti-offset component, which includes a second pipe (2024) and a soft rubber ring (2025); the second round rod (7) is set as a hollow structure; each second round rod (7) is connected to the second pipe (2024); a soft rubber ring (2025) is fixed to the lower end of each second round rod (7); a round hole (92) is opened on each second round rod (7), and the round hole (92) is aligned with the corresponding soft rubber ring (2025).

8. A winding and unwinding machine for polyurethane foam production according to claim 7, characterized in that: It also includes a partition (2026); a partition (2026) is fixed to the inside of each round rod (7); the partition (2026) divides the inside of the round rod (7) into a U-shaped channel.

9. A winding and unwinding machine for polyurethane foam production according to claim 8, characterized in that: It also includes fins (2027); each round rod 2 (7) has several fins (2027) fixed to its inner side.

10. A winding and unwinding machine for polyurethane foam production according to any one of claims 8-9, characterized in that: It also includes auxiliary components, including electric roller nine (2028), connecting block two (2029), electric roller ten (2030), electric slide rail three (2031) and electric slider three (2032); several electric roller nine (2028) are rotatably connected on the worktable (1); several electric slide rail three (2031) are fixed on the worktable (1); an electric slider three (2032) is slidably connected on each electric slide rail three (2031); all electric slider three (2032) are fixedly connected to connecting block two (2029); several electric roller ten (2030) are rotatably connected on connecting block two (2029).

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