A device for bending acrylic plate

Abstract

The utility model relates to a kind of acrylic sheet bending processing device, including box, the inner bottom surface of box is equipped with the limiting groove for placing acrylic sheet, and the side of limiting groove extends outward and is formed with rectangular opening on the surface of box, limiting groove is also equipped with bending plate, the top of heating chamber is also equipped with cylinder, the output end of cylinder extends to the inside of heating chamber, and the output end bottom of cylinder is also equipped with buckling piece, buckling piece is located the arrangement above limiting groove and is arranged with bending plate spacing up and down, box is also equipped with air gun;The buckling piece of adjustable cooperation of the present application is preset bending plate, the upper and lower buckling extrusion of acrylic sheet, ensure that in subsequent cooling process, acrylic sheet will not occur rebound, and in pressure maintaining stage, plate material is slowly cooled under the action of pressure, molecular chain has enough time to adjust arrangement, make inner and outer layer stress uniform distribution, significantly improve crack resistance, to effectively guarantee the production quality of acrylic sheet.

Description

Technical Field

[0001] This utility model relates to the field of bending device technology, specifically to an acrylic sheet bending processing device. Background Technology

[0002] A bending machine is a machine capable of bending thin plates. Its main structure includes a support frame, a worktable, and a clamping plate. The worktable is placed on the support frame and consists of a base and a pressure plate. The base is connected to the clamping plate via a hinge. The base consists of a housing, a coil, and a cover plate. The coil is placed in a recess in the housing, and the top of the recess is covered by the cover plate. During operation, the coil is energized by a wire, which generates an attractive force on the pressure plate, thereby clamping the thin plate between the pressure plate and the base. Because electromagnetic force clamping is used, the pressure plate can be made to meet various workpiece requirements, and workpieces with side walls can be processed. Operation is also very simple.

[0003] There are many types of bending machines, and different models of bending machines are used depending on the type of sheet material. For bending acrylic sheets, in order to bend the relatively brittle acrylic sheet, a heating device must be installed. The bending part needs to be heated and softened before bending.

[0004] Existing bending machine heating equipment has a simple structure, typically consisting of a strip heating plate that covers the bending area of ​​the sheet material for heating. While this method does heat the sheet material, it only allows for simple bending and lacks a pressure-holding structure, making it prone to springback and affecting production quality. Furthermore, if pressure is not held or the holding time is insufficient, residual stress may be generated inside the sheet material due to uneven cooling, leading to cracking, deformation, or cracks appearing during long-term use. This is especially noticeable when bending thicker acrylic sheets. Therefore, a bending machine with pressure-holding and cooling functions is needed to improve the bending accuracy of acrylic sheets and solve these defects. Utility Model Content

[0005] Based on the above description, this utility model provides an acrylic sheet bending processing device to solve the shortcomings of existing acrylic sheet bending equipment, which lacks a pressure holding structure and is prone to springback or residual stress due to uneven cooling after the initial bending is completed, resulting in cracking at the bending point and affecting production quality.

[0006] This utility model is achieved through the following technical solution:

[0007] An acrylic sheet bending processing device is characterized by comprising a housing, wherein a limiting groove for placing an acrylic sheet is provided on the inner bottom surface of the housing, and one side of the limiting groove extends outward and forms a rectangular opening on the surface of the housing; a bending plate is also provided on the limiting groove; a cylinder is also provided on the top of the heating chamber, the output end of the cylinder extends downward into the interior of the heating chamber, and a clamping member is also provided at the bottom of the output end of the cylinder; the clamping member is arranged directly above the limiting groove and spaced apart from the bending plate; an air gun is also provided inside the housing, and the output end of the air gun is arranged towards the center of the limiting groove.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, a sliding groove is provided on the inner side wall of the limiting groove, and a connecting seat is slidably installed on the sliding groove. The connecting seat has a U-shaped cross-section, and the bending plate is configured as a V-shaped structure. The two ends of the top surface of the bending plate are respectively attached to the top surfaces of the two sides of the connecting seat and locked and fixed by bolts.

[0010] Furthermore, the side of the limiting groove away from the rectangular opening is also provided with an electric telescopic rod, the output end of which is fixedly connected to the end face of the connecting seat and pushes the connecting seat toward the rectangular opening.

[0011] Furthermore, the fastening component includes a vertically arranged mounting frame, the bottom of which is provided with a cylinder, and both ends of the cylinder are respectively provided with hinge seats and movable plates are movably hinged thereto. Both movable plates are arranged in a triangular shape, extending outward from the hinge point.

[0012] Furthermore, the back of the movable plate is provided with an adjustment groove, the adjustment groove is provided with an adjustment seat, and a hydraulic cylinder is movably mounted on the mounting frame, the other end of the hydraulic cylinder being movably connected to the top surface of the adjustment seat.

[0013] Furthermore, a pressure sensor and a temperature sensor are also provided inside the cylinder.

[0014] Furthermore, the air gun is divided into two groups. One group of air guns is set on the side wall of the housing and the output end is arranged towards the center of the limiting plate. The other group of air guns is set on the end face of the limiting groove and the gun head is fixed on the connecting seat and arranged towards the rectangular opening.

[0015] Furthermore, both sets of air guns are connected to the same air pump via high-pressure air pipes, and an electric heater is also provided on the air pipe of one set of air guns located on the housing.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] This application improves upon existing pipe welding fixtures by employing adjustable clamping components in conjunction with pre-set bending plates to clamp and compress acrylic sheets from both top and bottom. This compression allows the sheets to be bent into the desired shape while maintaining continuous pressure through the clamping structure. Simultaneously, an air gun is used to accelerate cooling, enabling rapid shaping under compression. This ensures that the acrylic sheet will not spring back during subsequent cooling. Furthermore, during the pressure-holding stage, the sheet cools slowly under pressure, allowing sufficient time for the molecular chains to adjust and align, resulting in a uniform distribution of stress between the inner and outer layers. This significantly improves crack resistance and effectively guarantees the production quality of the acrylic sheets. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the box structure in this embodiment;

[0019] Figure 2 This is a schematic diagram of the internal structure of the box in this embodiment;

[0020] Figure 3 This is a schematic diagram of the structure of the electric telescopic rod, connecting seat, and bending plate in this embodiment;

[0021] Figure 4 This is a schematic diagram of the clamping component in this embodiment;

[0022] Figure 5 This is a front view of the fastening element in this embodiment;

[0023] Reference numerals: 1. Box body; 11. Limiting groove; 12. Slide groove; 13. Connecting seat; 14. Electric telescopic rod; 2. Bending plate; 3. Cylinder; 4. Clamping part; 41. Mounting bracket; 42. Cylinder; 43. Movable plate; 44. Adjusting groove; 45. Adjusting seat; 46. Hydraulic cylinder; 5. Air gun. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0026] Combination Figure 1-5 As shown, an acrylic sheet bending processing device includes:

[0027] Box 1 is the main structure of the entire processing equipment. It is rectangular and has a feeding port on one side. The plate is pushed into the box 1 by external equipment. The side wall has a rectangular opening to facilitate the unloading work.

[0028] The bending plate 2 is set inside the box 1 and serves as the bottom mold for the bending structure, arranged in a V-shape.

[0029] Cylinder 3 is located on the top of housing 1. A clamping part 4 is connected to the telescopic end at the bottom of cylinder 3. The bending of acrylic sheet is completed by the lifting and lowering of clamping part 4. It can also work with bending plate 2 to maintain pressure and ensure that the acrylic sheet can be shaped in the bending state to avoid springback at the bending point.

[0030] The air gun 5 is divided into two groups. One group is a hot air gun 5, which is used to heat the acrylic sheet to soften it. The other group is a cold air gun 5, which uses high-pressure airflow to accelerate the heat dissipation of the bent acrylic sheet and make it quickly set.

[0031] Specifically, in this embodiment, the bending production is mainly carried out on acrylic sheets with a thickness of 5mm or less. Therefore, the air gun 5 is used for heating and heat dissipation to improve the softening speed and heat dissipation effect, so as to ensure that it can be quickly shaped and improve production efficiency.

[0032] In addition, in order to quickly position the sheet material, that is, to position the acrylic sheet inside the box 1 to facilitate subsequent extrusion and bending, a limiting groove 11 should be provided on the inner bottom surface of the box 1. The limiting groove 11 is rectangular and has a sliding groove 12 on the inner side wall. A connecting seat 13 is movably installed on the sliding groove 12. There is a gap between the top surface of the connecting seat 13 and the inner top surface of the box 1, thus forming a stepped surface. Therefore, when the acrylic sheet is horizontally input into the box 1, it will be embedded in the limiting groove 11 and cannot move further.

[0033] The connector 13 is set as a U-shaped block, and the bent plate 2 is arranged in a V-shaped structure. The flanges at both ends of the top surface of the bent plate 2 overlap with the top surface of the connector 13 and are locked with bolts. When the acrylic plate extends inward, it will eventually be engaged with the opening at the top of the bent plate 2, thus completing the initial positioning of the acrylic plate.

[0034] Then, the cylinder 3 extends downward, causing the bottom clamping part 4 to face downward and gradually approach the acrylic plate. The clamping part 4 is positioned at the center of the acrylic plate, thus pressing the center of the plate and bending it into the specified shape in conjunction with the bending plate 2.

[0035] In the above structure, the fastening member 4 includes a mounting bracket 41 fixedly installed on the telescopic end of the bottom of the cylinder 3. The bottom end of the mounting bracket 41 is provided with a cylinder 42. Both ends of the cylinder 42 are provided with hinge seats and movable plates 43 are movably hinged. The two movable plates 43 are arranged in a triangular shape, extending outward from the hinge point.

[0036] In addition, to improve the adaptability of this embodiment, the clamping member 4 should be able to adjust the included angle between the two movable plates 43 according to the requirements of the sheet material and the model of the bending plate 2. Therefore, a hinge seat should also be provided on the mounting frame 41, and a hydraulic cylinder 46 should be movably mounted on the hinge seat. The hydraulic cylinder 46 is preferably an HSG series piston hydraulic cylinder 46, and it is equipped with a Bluetooth module for remote control, or it can be directly connected to an external control device via a wire. An adjustment seat 45 is hinged on the telescopic end of the hydraulic cylinder 46, and an adjustment groove 44 is provided on the back of the movable plate 43. The adjustment seat 45 and the adjustment groove 44 are slidably assembled. Therefore, by remotely controlling the hydraulic cylinder 46, the two movable plates 43 can be extended outward and downward or retracted upward around the hinge point, thereby controlling the included angle between the two movable plates 43.

[0037] A pressure sensor is installed inside the cylinder 42. The pressure sensor is preferably a sensor from the GEFRAN TPFADA series. It is mainly used to monitor the pressing force between the crimping machine and the bending plate 2 in real time, so as to avoid excessive pressure that could cause the acrylic plate to deform.

[0038] A temperature sensor is also installed inside the cylinder 42. The temperature sensor is preferably a PT1000-A resistance temperature sensor, which is mainly used to monitor the temperature of the acrylic sheet in real time to ensure that the acrylic sheet has cooled down and set when the pressing machine separates from the bending plate 2, thus effectively ensuring the production quality of the acrylic sheet.

[0039] During the above processing, when the crimping machine crimps the bending plate 2, the acrylic sheet needs to be heated in advance to soften it. Therefore, one set of air guns 5 should be set on the inner bottom surface of the housing 1, with its output end extending downwards and aimed at the center area of ​​the acrylic sheet to blow air. The other set of air guns 5 is directly arranged on the inner side wall of the limiting groove 11. At the same time, the bottom of the connecting seat 13 is provided with through holes. The cold air sprayed by the air guns 5 will pass through these through holes and directly blow onto the folded plate. By utilizing the heat transfer method of the folded plate, the heat dissipation effect of the acrylic sheet is accelerated. Therefore, the folded plate should be a metal plate with a smooth surface and good heat transfer performance. The two sets of air guns 5 are connected to the same air pump through air supply pipes, and an electric heater is equipped on the heated set of air guns 5 to form a hot air gun 5 structure. The electric heater is electrically connected through an external controller so that the operator can remotely adjust its heating temperature.

[0040] After the shaping is completed, the bent acrylic sheet needs to be output to the outside of the box 1. Therefore, an electric telescopic rod 14 should be provided on the side of the limiting groove 11 away from the rectangular opening. The electric telescopic rod 14 is fixedly connected to the end face of the connecting seat 13 by its end. Therefore, the connecting seat 13 can be pushed out of the box 1 to cooperate with other unloading parts, or to be picked up manually. This structure also makes it easy for workers to quickly replace the bending plate 2 on the connecting seat 13 according to actual needs. At the same time, the tilt angle of the clamping part 4 can be adjusted to bend acrylic sheets of other models for production.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. An acrylic sheet bending processing device, characterized in that, The enclosure includes a housing (1), on the inner bottom surface of which is provided a limiting groove (11) for placing an acrylic sheet. One side of the limiting groove (11) extends outward and forms a rectangular opening on the surface of the housing (1). A bending plate (2) is also provided on the limiting groove (11). A cylinder (3) is also provided on the top of the heating chamber. The output end of the cylinder (3) extends downward into the heating chamber. A clamping member (4) is also provided at the bottom of the output end of the cylinder (3). The clamping member (4) is arranged directly above the limiting groove (11) and spaced vertically from the bending plate (2). An air gun (5) is also provided inside the housing (1), and the output end of the air gun (5) is arranged towards the center of the limiting groove (11).

2. The acrylic sheet bending processing device according to claim 1, characterized in that, The inner wall of the limiting groove (11) is provided with a sliding groove (12), and a connecting seat (13) is slidably installed on the sliding groove (12). The connecting seat (13) has a U-shaped cross section, and the bending plate (2) is set as a V-shaped structure. The two ends of the top surface of the bending plate (2) are respectively attached to the top surfaces of the two sides of the connecting seat (13) and locked and fixed by bolts.

3. The acrylic sheet bending processing device according to claim 2, characterized in that, The limiting groove (11) is also provided with an electric telescopic rod (14) on the side away from the rectangular opening. The output end of the electric telescopic rod (14) is fixedly connected to the end face of the connecting seat (13) and pushes the connecting seat (13) toward the rectangular opening.

4. The acrylic sheet bending processing device according to claim 3, characterized in that, The fastening component (4) includes a vertically arranged mounting bracket (41). The bottom end of the mounting bracket (41) is provided with a cylinder (42). Both ends of the cylinder (42) are provided with hinge seats and movable plates (43) are movably hinged. The two movable plates (43) are arranged in a triangular shape, with the hinge point as the center.

5. The acrylic sheet bending processing device according to claim 4, characterized in that, The back of the movable plate (43) is also provided with an adjustment groove (44), and an adjustment seat (45) is provided on the adjustment groove (44). A hydraulic cylinder (46) is also movably installed on the mounting bracket (41), and the other end of the hydraulic cylinder (46) is movably connected to the top surface of the adjustment seat (45).

6. The acrylic sheet bending processing device according to claim 5, characterized in that, The cylinder (42) is also equipped with a pressure sensor and a temperature sensor.

7. The acrylic sheet bending processing apparatus according to claim 6, characterized in that, The air gun (5) is divided into two groups. One group of air guns (5) is set on the side wall of the housing (1) and the output end is arranged in the direction of the center of the limiting plate. The other group of air guns (5) is set on the end face of the limiting groove (11) and the gun head is fixed on the connecting seat and arranged in the direction of the rectangular opening.

8. The acrylic sheet bending processing apparatus according to claim 7, characterized in that, Both sets of air guns (5) are connected to the same air pump through high-pressure air pipes, and an electric heater is also provided on the air pipe of one set of air guns (5) located on the housing (1).

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