Plastic Sheet Continuous Bending Device

Abstract

The present invention relates to the technical field of plastic bending machines, in particular to a continuous plastic sheet bending device. The existing bending devices cannot perform continuous bending and have a long production cycle. The continuous plastic sheet bending device includes a bending device, a loading platform, and a shaping platform. The bending device is located between the loading platform and the shaping platform. The bending device includes a chain plate strip, a conveying pressure wheel, a heating device, and a bending guide plate. The chain plate strip is driven by a driving motor through a belt to drive a tensioning wheel to rotate to provide power. The bending guide plate is a rectangular thin plate. One end of the bending guide plate is attached to the surface of the operation platform and the other end is perpendicular to the operation platform to form an arc-shaped plate with a slope. The loading platform and the shaping platform are provided with a limiting device to achieve continuous bending, and the bending and shaping can be carried out in different sections at the same time, shortening the production cycle, and having good development prospects in the technical field of plastic bending machines.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic bending machines, and particularly to a continuous plastic sheet bending device. Background Art

[0002] The current implementation of the hollow plastic sheet bending machine is to adopt a custom length method. For example, if a 3-meter length is required, it is customized to 3 meters, and if a 6-meter length is required, it is customized to 6 meters. The production length of the equipment has limitations and occupies a large amount of space. In particular, there is no equipment on the market that exceeds 6 meters. Moreover, the production method is to perform one-piece one-time bending and then shaping. The bending and shaping processes are separated, resulting in a long production cycle time, inability to continuously produce, and limited length. Therefore, the production efficiency is low and the cost is high. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a continuous plastic sheet bending device to solve the problems that the existing bending device cannot perform continuous bending and has a long production cycle.

[0004] The technical solution is that the continuous plastic sheet bending device includes a bending device, a feeding platform, and a shaping platform. The plastic sheet is fed from the feeding platform to the bending device. After being bent by the bending device, it is discharged from the shaping platform and shaped during the discharging process. The bending device is located between the feeding platform and the shaping platform. The bending device includes a chain plate strip, a conveying pressure wheel, a heating device, and a bending guide plate. The chain plate strip is driven by a driving motor through a belt to rotate a tensioning wheel to provide power. The plastic sheet to be bent is conveyed between the chain plate strip and the conveying pressure wheel on the bending device. The bending line is located below the heating device. The plastic sheet is softened by the hot air of the heating device and is bent under the action of the bending guide plate. The bending guide plate is a rectangular thin plate. One end of the bending guide plate is attached to the surface of the operating platform and the other end is perpendicular to the operating platform to form an arc-shaped plate with a slope. The feeding platform and the shaping platform are provided with a limiting device, and the width of the limiting device is adjustable to adapt to plastic sheets of different widths. The heating device and the driving motor are controlled by a control cabinet switch. The plastic sheet to be bent is conveyed between the chain plate strip and the conveying pressure wheel on the bending device. The chain plate strip provides the main power, and the conveying pressure wheel assists the plastic sheet to move forward during this process. By adjusting the width of the limiting device on the feeding platform, the bending line is located below the heating device. The plastic sheet is softened by the hot air of the heating device and is bent under the action of the bending guide plate. When it is sent to the shaping platform, the temperature of the bent part of the softened plastic sheet decreases, achieving the purpose of shaping. While one plastic sheet is being bent in the latter half, the front bent part enters the shaping process, and the plastic sheet bending is carried out continuously.

[0005] Furthermore, the conveying pressure wheel includes a force - applying block above and a transmission block below. An empty groove with an opening downward is provided on the side of the transmission block facing the chain plate strip. A plurality of conveying wheels are arranged in the empty groove. The force - applying block is a solid metal block, which is used to increase the mass of the conveying pressure wheel, press the plastic plate tightly to prevent it from warping or shifting. The conveying wheels change from sliding friction to rolling friction under the conveying pressure wheel, facilitating the conveying of the plastic plate. The force - applying block and the transmission block are integrally formed.

[0006] Furthermore, a pressure rod for adjusting the height of the conveying pressure wheel is provided above the conveying pressure wheel. A bolt is provided between the pressure rod and the conveying pressure wheel. By tightening the bolt, it is adjusted towards the direction close to the conveying pressure wheel to press the conveying pressure wheel tightly, reducing the distance between the conveying pressure wheel and the chain plate strip. Applied to plastic plates of different thicknesses, when the plastic plate moves between the conveying pressure wheel and the chain plate strip, it will neither warp due to a large space nor have too much resistance due to being pressed too tightly.

[0007] Furthermore, the heating device includes a hot air gun and an air knife. The wind force of the hot air gun is adjusted through the adjustment button on the control cabinet. The air knife is a cuboid with a cavity inside. The inlet of the air knife is connected to the outlet of the hot air gun and the outlet faces the plane of the bending device. The opening width of the air knife is between 0.15 - 0.25 mm. The heat of the hot air gun is directly blown onto the bending line of the plastic plate through the opening of the air knife. The small width avoids the problem that the bending line cannot remain horizontal and the accuracy is insufficient due to the large - area softening of the plastic plate during bending and the non - concentration of the lines. At the same time, it can save energy and achieve the purpose of efficiently softening the bending part of the plastic plate.

[0008] Furthermore, the air knife is connected to the conveying pressure wheel through an adjusting part. A long groove for fixing the adjusting part is provided on the upper surface of the conveying pressure wheel. The adjusting part is in an "L" shape. One end of the adjusting part is fixedly connected to the air knife and the other end is connected to the long groove through a screw and can move in the long groove to adjust the distance between the air knife and the conveying pressure wheel, so as to change the position of the plastic plate corresponding to the air knife opening and adapt to the heating during bending of plastic plates of different widths.

[0009] Furthermore, guide grooves are provided on the loading platform and the shaping platform. The limiting device includes two parallel positioning blocks. Each positioning block is fixed on the loading platform and the shaping platform through the guide grooves and can be adjusted by moving in the guide grooves to change the distance between the two parallel positioning blocks to adapt to the bending of plastic plates of different widths.

[0010] Furthermore, a shaping transmission wheel is provided between the bending device and the shaping platform to prevent the plastic plate from deforming.

[0011] Furthermore, the chain plate strip is made of steel to prevent the chain plate strip from deforming when the heating device heats the plastic plate.

[0012] Furthermore, a transition piece is provided at one end of the bending guide plate that lies flat on the surface of the operating platform. The transition piece has an upper surface in the shape of a slope with a gradually decreasing thickness during the transition from the end of the bending plate to the plane of the operating platform, facilitating the smooth entry of the plastic plate into the bending guide plate.

[0013] The technical effect of the present invention is that through the cooperation of the bending device and the two end platforms, continuous bending is achieved. The adjustable limit device is used to adapt to the bending processing of plastic plates with different widths, and by adjusting the distance between the chain plate strips and the transmission pressure wheels, plastic plates with different thicknesses can be adapted. The air knife has a small opening and a precise heating range, providing convenience for the bending process. One device can meet the bending work of plastic plates with a variety of different dimensions, saving costs, having a high bending efficiency, accurate angles, and being able to perform bending and shaping simultaneously in different segments, shortening the production cycle. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the present invention.

[0015] Figure 2 It is a front view structural schematic diagram of the present invention.

[0016] Figure 3 It is a side view structural schematic diagram of the present invention.

[0017] Figure 4 It is a top view structural schematic diagram of the present invention.

[0018] 1. Loading platform, 2. Bending device, 3. Shaping platform, 4. Positioning block, 5. Transmission pressure wheel, 6. Air knife, 7. Hot air gun, 8. Bending guide, 9. Shaping transmission wheel, 10. Driving motor, 11. Belt, 12. Tensioning wheel, 13. Chain plate, 14. Control cabinet, 15. Pressure rod, 16. Guide groove, 17. Adjusting part, 18. Transmission wheel, 19. Transition piece. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example 1: Consisting of Figures 1 to 4Provided is a continuous bending device for plastic plates, which includes a bending device 2, a feeding platform 1, and a shaping platform 3. The plastic plate is fed into the bending device from the feeding platform 1. After being bent by the bending device, it is discharged from the shaping platform 3 and shaped during the discharging process. The bending device 2 is located between the feeding platform 1 and the shaping platform 3. A shaping drive wheel 9 is arranged between the bending device 2 and the shaping platform to prevent the plastic plate from deforming. The bending device includes a chain plate strip 13, a conveying pressure wheel 5, a heating device, and a bending guide plate 8. The chain plate strip 13 is made of steel to prevent the chain plate strip from deforming due to heat when the heating device heats the plastic plate. The chain plate strip 13 is driven by a driving motor 10 through a belt 11 to drive a tensioning wheel 12 to rotate to provide power. The plastic plate to be bent is conveyed between the chain plate strip 13 and the conveying pressure wheel 5 on the bending device. The bending line is located below the heating device. The plastic plate is softened by the hot air of the heating device and is bent under the action of the bending guide plate 8. The bending guide plate 8 is a rectangular thin plate. One end of the bending guide plate 8 is attached to the surface of the operation platform and the other end is perpendicular to the operation platform to form an arc-shaped plate with a slope. Limiting devices are arranged on the feeding platform 1 and the shaping platform 3. The width of the limiting device is adjustable to adapt to plastic plates of different widths. The heating device and the driving motor are controlled by a switch through a control cabinet. The plastic plate to be bent is manually fed into the product according to the limiting device and reaches between the chain plate strip 13 and the conveying pressure wheel 5 on the bending device. The motor drives the conveying wheel to convey the product forward and ensures that the angle remains unchanged after shaping through the shaping part and then conveys it out, realizing the function of continuous bending production with no limit on length. The conveying pressure wheel 5 assists the plastic plate to move forward in this process. By adjusting the width of the limiting device on the feeding platform, the bending line is located below the heating device. The plastic plate is softened by the hot air of the heating device and is bent under the action of the bending guide plate 8. When it is sent to the shaping platform, the temperature of the bent part of the softened plastic plate decreases to achieve the purpose of shaping. While one plastic plate is being bent in the second half, the front part that has been bent is shaped, and the bending of the plastic plate is carried out continuously.

[0023] Embodiment 2: In one embodiment, the conveying pressure wheel 5 includes a force - applying block above and a transmission block below. On the side of the transmission block facing the chain plate strip 13, an empty groove with an opening downward is provided. A plurality of conveying wheels 18 are arranged in the empty groove. The force - applying block is a solid metal block, which is used to increase the mass of the conveying pressure wheel 5, press the plastic plate tightly to prevent it from warping or shifting. The conveying wheels 18 change from sliding friction to rolling friction under the conveying pressure wheel, which is convenient for the transmission of the plastic plate. The force - applying block and the transmission block are integrally formed. Above the conveying pressure wheel 5, a pressure rod 15 for adjusting the height of the conveying pressure wheel 5 is provided. A bolt is arranged between the pressure rod 15 and the conveying pressure wheel 5. By tightening the bolt, it is adjusted in the direction close to the conveying pressure wheel 5 to press the conveying pressure wheel tightly, reducing the distance between the conveying pressure wheel and the chain plate strip 13. Applied to plastic plates of different thicknesses, when the plastic plate moves between the conveying pressure wheel and the chain plate strip, it will neither warp due to a large space nor have too much resistance due to excessive pressing.

[0024] In the above - mentioned embodiment, the heating device includes a heating air gun 7 and an air knife 6. The wind force of the heating air gun 7 is adjusted through the adjustment button on the control cabinet 14. The air knife 6 is a cuboid with a cavity inside. The air knife inlet is communicated with the heating air gun outlet and the outlet faces the plane of the bending device. The opening width of the air knife 6 is between 0.15 - 0.25 mm. The heat of the heating air gun is directly blown onto the bending line of the plastic plate through the opening of the air knife. The width is small, thus avoiding the problem that the bending line cannot be kept horizontal and the accuracy is insufficient due to the large - area softening of the plastic plate during bending and the non - concentration of the lines. At the same time, it can save energy and achieve the purpose of efficiently softening the bending part of the plastic plate. The air knife 6 is connected to the conveying pressure wheel 5 through an adjusting part 17. A long groove for fixing the adjusting part 17 is provided on the upper surface of the conveying pressure wheel 5. The adjusting part 17 is in an "L" shape. One end of the adjusting part 17 is fixedly connected to the air knife 6 and the other end is connected to the long groove through a screw and can move in the long groove to adjust the distance between the air knife 6 and the conveying pressure wheel 5, so as to change the position of the plastic plate corresponding to the air knife opening and adapt to the heating during the bending of plastic plates of different widths.

[0025] In the above - mentioned embodiment, guide grooves 16 are provided on the loading platform 1 and the shaping platform 3. The limiting device includes two parallel positioning blocks 4. Each positioning block 4 is fixed on the loading platform 1 and the shaping platform 3 through the guide grooves 16, and the distance between the two parallel positioning blocks 4 is adjusted by moving in the guide grooves to adapt to the bending of plastic plates of different widths.

[0026] In the above - mentioned embodiment, a transition piece is provided at the end of the bending guide plate 8 that is flat against the surface of the operation platform. The transition piece has a gradually decreasing thickness from the end of the bending plate to the plane of the operation platform, forming a sloping upper surface, which is convenient for the plastic plate to smoothly enter the bending guide plate 8.

[0027] The technical effect of the present invention is that through the cooperation of the bending device and the two end platforms, the plastic plate bending machine realizes continuous bending, adapts to the bending processing of plastic plates with different widths through the adjustable limiting device, adapts to plastic plates with different thicknesses by adjusting the distance between the chain plates and the conveying pressure wheels, has a small air knife opening and a precise heating range, provides convenience for the bending process, one device can meet the bending work of plastic plates with various different scales, saves costs, has high bending efficiency, accurate angles, and can perform bending and shaping simultaneously in different sections, shortening the production cycle.

[0028] The above has described the present invention in detail through specific implementation manners and embodiments, but these do not constitute limitations on the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. Continuous bending device for plastic plates, comprising a bending device (2), a loading platform (1) and a shaping platform (3), characterized in that, The bending device (2) is located between the loading platform (1) and the shaping platform (3). The bending device includes a chain plate strip (13), a conveying pressure wheel (5), a heating device, and a bending guide plate (8). The chain plate strip (13) is driven by a driving motor (10) through a belt (11) to drive a tensioning wheel (12) to rotate to provide power. The bending guide plate (8) is a rectangular thin plate. One end of the bending guide plate (8) is attached to the surface of the operation platform, and the other end is perpendicular to the operation platform to form an arc-shaped plate with a slope. Limiting devices are provided on the loading platform (1) and the shaping platform (3); the heating device includes a heating air gun (7) and an air knife (6). The air knife (6) is a cuboid with a cavity inside. The inlet of the air knife is communicated with the outlet of the heating air gun, and the outlet faces the plane of the bending device. The opening width of the air knife (6) is between 0.15 - 0.25 mm; the air knife (6) is connected to the conveying pressure wheel (5) through an adjusting member (17). A long groove for fixing the adjusting member (17) is provided on the upper surface of the conveying pressure wheel (5). The adjusting member (17) is in an "L" shape. One end of the adjusting member (17) is fixedly connected to the air knife (6), and the other end is connected to the long groove through a screw.

2. The plastic sheet continuous bending device according to claim 1, characterized in that, The conveying pressure wheel (5) includes a force-applying block above and a driving block below. An open slot opening downward is provided on the surface of the driving block facing the chain plate strip (13), and a plurality of conveying wheels (18) are arranged in the open slot.

3. The plastic sheet continuous bending device according to claim 1 or 2, characterized in that, A pressure rod (15) for adjusting the height of the conveying pressure wheel (5) is provided above the conveying pressure wheel (5), and a bolt is provided between the pressure rod (15) and the conveying pressure wheel (5).

4. The plastic sheet continuous bending device according to claim 1, characterized in that, Guide grooves (16) are provided on the loading platform (1) and the shaping platform (3). The limiting device includes two parallel positioning blocks (4), and each positioning block (4) is fixed on the loading platform (1) and the shaping platform (3) through the guide grooves (16).

5. The plastic sheet continuous bending device according to claim 1, characterized in that, A shaping driving wheel (9) is provided between the bending device (2) and the shaping platform.

6. The plastic sheet continuous bending device according to claim 1, wherein, The chain plate strip (13) is made of steel.

7. The plastic sheet continuous bending device according to claim 1, characterized in that, A transition member (19) is provided at the end of the end of the bending guide plate (8) that is flat against the surface of the operation platform. The transition member has a slope-shaped upper surface with a gradually decreasing thickness during the transition from the end of the bending plate to the plane of the operation platform.

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