Bending equipment

Abstract

The utility model discloses bending equipment, and belongs to the technical field of copper bar machining. The bending equipment comprises a height adjusting device, a first clamping device and a second clamping device, at least one clamping device is installed on the height adjusting device, the first clamping device and the second clamping device are used for clamping the two ends of the bent portion of the copper bar respectively, and the height adjusting device is used for adjusting the height difference when the different clamping devices clamp the copper bar. The height difference between the first clamping device and the second clamping device is adjusted through the height adjusting device when the copper bar is clamped, so that the bending angle of the copper bar can be adjusted, the problem that the bending angle of a die in the prior art is fixed is solved, and the structure change difficulty and cost of bending equipment when the bending angle of the copper bar is changed are reduced.

Description

A bending device Technical Field

[0001] This utility model belongs to the field of copper busbar processing technology, specifically a bending device and processing method. Background Technology

[0002] In the production process of copper busbars, molds are needed to bend the copper busbars. However, the existing molds for bending copper busbars are fixed structures, which means that they can only bend the copper busbars at fixed angles. When the product changes, the corresponding molds need to be replaced for processing. Summary of the Invention

[0003] Purpose of the utility model: To provide a bending device that can adjust the bending angle by adjusting the height difference between two clamping devices, thus solving the problem of fixed bending angle of existing copper busbar processing molds.

[0004] The technical solution of this utility model is as follows: In the first aspect, a bending device includes: a height adjustment device, a first clamping device, and a second clamping device.

[0005] At least one of the clamping devices is mounted on the height adjustment device.

[0006] The first clamping device and the second clamping device are used to clamp the two ends of the bent part of the copper busbar, respectively.

[0007] The height adjustment device is used to adjust the height difference when different clamping devices clamp the copper busbar.

[0008] In a further embodiment of the first aspect, the bending device further includes a third clamping device.

[0009] The first clamping device, the second clamping device, and the third clamping device are arranged in sequence. At least one of the first clamping device, the second clamping device, and the third clamping device is installed on the height adjustment device, so that the bending equipment has the function of performing "Z" shaped bending on the copper busbar with two clamping devices using two sets of molds each time, and also has the function of performing "Ω" shaped bending on the copper busbar each time with three clamping devices. When performing "Ω" shaped bending on the copper busbar, the three clamping devices can reduce the number of bending times compared with the two clamping devices, thus improving the versatility of the bending equipment.

[0010] In a further embodiment of the first aspect, the second clamping device is mounted on the height adjustment device, and the adjustable height of the second clamping device in the middle enables the adjustable bending angle of the two sections of the copper busbar.

[0011] In a further embodiment of the first aspect, the clamping device includes: a fixed frame, a clamping power source, and a mold.

[0012] The clamping power source is mounted on the fixed frame, and the mold is mounted on the clamping power source. The clamping power source is used to drive the mold to clamp the copper busbar.

[0013] The clamping power source includes two hydraulic cylinders and multiple clamping devices distributed along the width direction of the clamping power source. When the output pressure of the clamping power source of the two hydraulic cylinders is the same as that of the clamping power source of the one hydraulic cylinder, the width dimension of the clamping power source of the two hydraulic cylinders is smaller than that of the clamping power source of the one hydraulic cylinder. The distribution of multiple clamping devices along the width direction of the clamping power source can greatly reduce the spacing of the molds, making the bending equipment structure more compact and enabling bending of copper busbars with smaller spacing.

[0014] In a further embodiment of the first aspect, the bending device further includes a spacing adjustment device.

[0015] At least one of the clamping devices is mounted on the spacing adjustment device.

[0016] The spacing adjustment device is used to adjust the spacing between the copper busbar clamping parts of different clamping devices. By adjusting the spacing between the copper busbar clamping parts of different clamping devices, the length of the copper busbar bending part can be adjusted, which solves the problem of fixed bending position of the mold and further reduces the difficulty and cost of structural changes to the bending equipment when the length of the copper busbar bending part changes.

[0017] In a further embodiment of the first aspect, the same clamping device is installed on the height adjustment device or the spacing adjustment device, which can avoid the bending equipment having an overly complex local structure and excessive pressure, making the bending equipment easy to adjust, debug, and maintain, and improving the working stability of the bending equipment.

[0018] In a further embodiment of the first aspect, the bending device further includes an angle compensation device.

[0019] At least one of the clamping devices is equipped with an angle compensation device, which is used to make the angle of the part of the clamping device that holds the copper busbar adjustable. It can set the bending angle compensation amount as needed based on the original design bending angle, reduce the impact of material springback, reduce the holding time and improve processing efficiency. The angle compensation device can reduce the difficulty and cost of adjusting the bending angle compensation amount.

[0020] In a further embodiment of the first aspect, the angle compensation device includes: an angle compensation power source, an angle compensation linear displacement mechanism, and an angle compensation rotation mechanism.

[0021] The angle compensation power source is installed on the fixed frame of the clamping device, the angle compensation rotation mechanism is installed on the mold of the clamping device, and the angle compensation linear displacement mechanism connects the angle compensation power source and the angle compensation rotation mechanism.

[0022] The mold equipped with the angle compensation device is rotatably mounted on a clamping power source.

[0023] When the angle compensation power source drives the angle compensation linear displacement mechanism to move, the angle compensation rotation mechanism drives the mold to rotate. By driving the mold to rotate through the linear motion mechanism, the force required for the overall rotation of the clamping device is reduced, the stability of the bending equipment is improved, and the cost of the bending equipment is also reduced.

[0024] In a further embodiment of the first aspect, the angle-compensating rotation mechanism includes: a slider, an eccentric shaft, a connector, and a rotating shaft.

[0025] The slider is mounted on the eccentric shaft, the eccentric shaft is mounted on the connector, and the connector and the rotating shaft are mounted on the mold of the clamping device.

[0026] The slider connects the angle-compensating linear displacement mechanism and the clamping device's fixed frame, and the rotating shaft connects the clamping device's fixed frame.

[0027] The slider is provided with a receiving cavity, and the eccentric shaft is inserted into the receiving cavity. The eccentric shaft is set at a predetermined distance from the upper and lower sides of the receiving cavity.

[0028] When the angle-compensating power source drives the slider to move through the angle-compensating linear displacement mechanism, the slider drives the eccentric shaft, connecting parts and mold to rotate around the rotation axis. By setting a predetermined distance between the eccentric shaft and the upper and lower sides of the receiving cavity, the force transmitted to the slider can be reduced when the clamping power source of the clamping device drives the mold to move, thereby improving the service life of the angle-compensating linear displacement mechanism and the angle-compensating rotation mechanism, and thus improving the service life of the bending equipment.

[0029] Secondly, the processing method based on the bending equipment described in the first aspect includes: S100, adjusting the height of at least one clamping device using a height adjustment device according to the required bending angle of the copper busbar bending part, so that the parts of the copper busbar clamped by different clamping devices reach a predetermined height difference.

[0030] S200. First, use a clamping device to hold the copper busbar and position it. Then, use other clamping devices to hold the copper busbar so that the clamped part of the copper busbar reaches the predetermined height difference, so that the copper busbar is bent.

[0031] The beneficial effects of this utility model are as follows: This application adjusts the height of the first clamping device and / or the second clamping device by means of a height adjustment device, thereby adjusting the height difference between the first clamping device and the second clamping device when clamping the copper busbar, so that a height difference is generated at both ends of the copper busbar bending part, thereby bending the copper busbar between the two molds. By adjusting the height difference between the first clamping device and the second clamping device when clamping the copper busbar by means of a height adjustment device, the bending angle of the copper busbar can be adjusted, which solves the problem of fixed bending angle of the mold in the prior art, and reduces the difficulty and cost of structural modification of the bending equipment when the bending angle of the copper busbar is changed. Attached Figure Description

[0032] Figure 1 is a top view structural diagram of two clamping device embodiments of this utility model.

[0033] Figure 2 is a bottom view structural diagram of two clamping device embodiments of this utility model.

[0034] Figure 3 is a frontal view structural diagram of three clamping device embodiments of this utility model.

[0035] Figure 4 is a schematic diagram of an embodiment of the height adjustment device and clamping device of this utility model.

[0036] Figure 5 is a schematic diagram of an embodiment of the spacing adjustment device and clamping device of this utility model.

[0037] Figure 6 is a schematic diagram of an embodiment of the angle compensation device and clamping device of this utility model.

[0038] Figure 7 is a cross-sectional schematic diagram of the angle compensation device of this utility model.

[0039] Figure 8 is a schematic diagram of the rotation shaft of the angle compensation device of this utility model and its cooperation with the mold.

[0040] Figure 9 is a simplified diagram illustrating the working principle of the two clamping devices of this utility model.

[0041] The reference numerals in the figure are as follows: height adjustment device 1, height hydraulic cylinder 11, height guide mechanism 12, first clamping device 2, second clamping device 3, fixed frame 31, clamping power source 32, mold 33, fixed mold 331, moving mold 332, spacing adjustment device 4, spacing lead screw mechanism 41, spacing power source 42, spacing guide mechanism 43, third clamping device 5, angle compensation device 6, angle compensation power source 61, angle compensation linear displacement mechanism 62, angle compensation rotation mechanism 63, slider 631, eccentric shaft 632, connecting piece 633, rotating shaft 634. Detailed Implementation

[0042] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0043] This utility model discloses a bending device and processing method. By adjusting the height difference between the two clamping devices, the bending angle can be adjusted, thus solving the problem of fixed bending angle of existing molds.

[0044] According to a first embodiment of the first aspect, the bending device includes: a frame, a control device, a height adjustment device 1, a first clamping device 2, and a second clamping device 3.

[0045] At least one clamping device is installed on the height adjustment device 1, which is mounted on the frame. The clamping devices not installed on the height adjustment device 1 are mounted on the frame. The power source and sensor of the height adjustment device 1, the first clamping device 2, and the second clamping device 3 are connected to a control device such as a PLC, which controls them to work.

[0046] The first clamping device 2 and the second clamping device 3 are used to clamp the two ends of the bent part of the copper busbar, respectively.

[0047] The height adjustment device 1 is used to adjust the height difference when different clamping devices clamp the copper busbar.

[0048] When the required bending angle increases, the height difference when the clamping device holds the copper busbar increases.

[0049] When the required bending angle is reduced, the height difference when the clamping device holds the copper busbar is reduced.

[0050] In a further embodiment, the bending device further includes a third clamping device 5.

[0051] The first clamping device 2, the second clamping device 3, and the third clamping device 5 are arranged in sequence, and at least one of the first clamping device 2, the second clamping device 3, and the third clamping device 5 is installed on the height adjustment device 1.

[0052] The second clamping device 3 is installed on the height adjustment device 1.

[0053] Regarding the clamping device, the clamping device includes: a fixed frame 31, a clamping power source 32, and a mold 33.

[0054] The clamping power source 32 is installed on the fixed frame 31, and the mold 33 is installed on the clamping power source 32. The clamping power source 32 is used to drive the mold 332 to clamp the copper busbar.

[0055] The clamping power source 32 includes two hydraulic cylinders and multiple clamping devices distributed along the width direction of the clamping power source 32.

[0056] The mold 33 equipped with the angle compensation device 6 includes a moving mold 332, a mold 33 guide mechanism, and a fixed mold 331. The moving mold 332 is connected to the mold 33 guide mechanism, and the mold 33 guide mechanism is connected to the fixed mold 331. The moving mold 332 is mounted on a clamping power source 32, which can drive the moving mold 332 to move along the mold 33 guide mechanism towards the fixed mold 331. The mold 33 guide mechanism can be a combination of a guide shaft and a linear bearing, or it can be a guide rail slider 631 mechanism. The fixed mold 331 of the mold 33 without the angle compensation device 6 is mounted on a fixed frame 31. The fixed mold 331 of the mold 33 equipped with the angle compensation device 6 is connected to the connecting piece 633 and the rotating shaft 634 of the angle compensation device 6. The moving mold 332 is rotatably mounted on the clamping power source 32. When the angle compensation device 6 drives the fixed mold 331 to rotate, the fixed mold 331 drives the mold 332 guide mechanism and the moving mold 332 to rotate. As shown in Figure 8, when the mold 33 guide mechanism is a guide mechanism, the guide mechanism connects the moving mold 332, the fixed mold 331 and the connecting piece 633, so that the angle compensation device 6 drives the moving mold 332, the fixed mold 331 and the guide rail slider 631 mechanism to rotate together, which improves the overall integrity of the mold 33 when rotating, and thus improves the working stability of the mold 33.

[0057] Regarding the height adjustment device 1, the height adjustment device 1 includes a height hydraulic cylinder 11 mounted on the frame and vertically arranged, and a height guide mechanism 12. The height guide mechanism 12 can be a guide shaft and a linear bearing, or a guide mechanism. The fixing frame 31 of the clamping device is mounted on the height hydraulic cylinder 11 and the height guide mechanism 12 of the height adjustment device 1. In other embodiments, the height adjustment device 1 may also include: a motor, a lead screw mechanism mounted on the frame and vertically arranged, and a guide mechanism. The motor is connected to the lead screw mechanism, and the fixing frame 31 of the clamping device is mounted on the electric lead screw mechanism and the guide mechanism, so that the height adjustment of the clamping device is realized by electric means.

[0058] The second embodiment of the first aspect adds a spacing adjustment device 4 to the first embodiment.

[0059] The spacing adjustment device 4 is mounted on the frame, and at least one clamping device is mounted on the spacing adjustment device 4. In this embodiment, the clamping device not mounted on the height adjustment device 1 or the spacing adjustment device 4 is mounted on the frame.

[0060] The spacing adjustment device 4 includes a spacing screw mechanism 41, a spacing power source 42, and a spacing guide mechanism 43. The spacing screw mechanism 41 and the spacing power source 42 are connected. The spacing guide mechanism 43 and the spacing screw mechanism 41 are mounted on the frame. The clamping device is mounted on the spacing guide mechanism 43 and the spacing screw mechanism 41. As shown in Figure 5, the spacing guide mechanism 43 is a dovetail groove guide mechanism. The spacing power source 42 of the spacing adjustment device 4 drives the clamping device to move along the arrangement direction of multiple clamping devices through the spacing screw mechanism 41, so that the spacing adjustment device 4 can be used to adjust the spacing of the copper busbar clamped by different clamping devices. The spacing adjustment method is not limited to this.

[0061] In this embodiment, the same clamping device is installed on either the height adjustment device 1 or the spacing adjustment device 4.

[0062] As shown in Figure 3, the first clamping device 2 and the third clamping device 5 are installed on the spacing adjustment device 4, and the second clamping device 3 is installed on the height adjustment device 1.

[0063] Regarding the spacing adjustment device 4, the spacing adjustment device 4 includes: a motor, a lead screw mechanism and a guide mechanism mounted on the frame and extending along the distribution direction of the clamping device. The motor is connected to the lead screw mechanism, and the guide mechanism can be a guide shaft and a linear bearing, or a guide mechanism in itself. The fixing frame 31 of the clamping device is mounted on the lead screw mechanism and the guide mechanism of the spacing adjustment device 4. In other embodiments, the spacing adjustment device 4 may also include: a hydraulic cylinder mounted on the frame and extending along the distribution direction of the clamping device and a guide mechanism, with the fixing frame 31 of the clamping device mounted on the hydraulic cylinder and the guide mechanism of the spacing adjustment device 4.

[0064] The second embodiment of the first aspect adds an angle compensation device 6 to the first or second embodiment.

[0065] At least one clamping device is equipped with an angle compensation device 6. The angle compensation device 6 is used to make the angle of the part of the clamping device that holds the copper busbar adjustable. The angle compensation device 6 can drive the entire clamping device to rotate, or it can drive the mold 33 of the clamping device to rotate.

[0066] Regarding the angle compensation device 6, the angle compensation device 6 includes: an angle compensation power source 61, an angle compensation linear displacement mechanism 62, and an angle compensation rotation mechanism 63.

[0067] Angle-compensating power source 61 is mounted on the fixed frame 31 of the clamping device, angle-compensating rotation mechanism 63 is mounted on the mold 33 of the clamping device, and angle-compensating linear displacement mechanism 62 connects angle-compensating power source 61 and angle-compensating rotation mechanism 63.

[0068] The mold 33 equipped with the angle compensation device 6 is rotatably mounted on the clamping power source 32. As shown in Figure 4, the mold 33 is rotatably mounted on the clamping power source 32 through a hinge structure, so that the angle compensation device 6 drives the mold 33 of the clamping device to rotate.

[0069] When the angle compensation power source 61 drives the angle compensation linear displacement mechanism 62 to move, the angle compensation rotation mechanism 63 drives the mold 332 33 to rotate.

[0070] Regarding the angle compensation rotation mechanism 63, the angle compensation rotation mechanism 63 includes: slider 631, eccentric shaft 632, connector 633 and rotation shaft 634.

[0071] The slider 631 is mounted on the eccentric shaft 632, the eccentric shaft 632 is mounted on the connector 633, and the connector 633 and the rotating shaft 634 are mounted on the mold 33 of the clamping device.

[0072] The slider 631 connects the angle-compensating linear displacement mechanism 62 and the fixed frame 31 of the clamping device. The rotating shaft 634 connects the fixed frame 31 of the clamping device. In this embodiment, the fixed frame 31 of the clamping device is provided with a slide groove, and the slider 631 is installed in the slide groove. The slider 631 can move along the extension direction of the slide groove. In other embodiments, the angle-compensating linear displacement mechanism 62 may also include a guide rail, and the guide rail is provided on the fixed frame 31 so that the slider 631 cooperates with the guide rail. The slider 631 can move along the extension direction of the guide rail. This is not a limitation.

[0073] The slider 631 has a receiving cavity, and the eccentric shaft 632 is inserted into the receiving cavity. The eccentric shaft 632 is set at a predetermined distance from the upper and lower sides of the receiving cavity. The upper and lower sides of the receiving cavity refer to the two side walls in the height direction of the receiving cavity, and the left and right sides of the receiving cavity refer to the two side walls of the receiving cavity through which the angle compensation linear displacement mechanism 62 moves. The eccentric shaft 632 includes a round shaft part and a square shaft part as shown in Figure 7. The round shaft part is connected to the connecting member 633, and the square shaft part is inserted into the receiving cavity of the slider 631. The square shaft part is set at a predetermined distance from the upper and lower sides of the receiving cavity. The square shaft part and the left and right sides of the receiving cavity are planar side walls. The square shaft part and the left and right sides of the receiving cavity are dimensionally clearance-fitted. During operation, the square shaft part is connected to one of the left and right sides of the receiving cavity, so that the slider 631 drives the eccentric shaft 632 to move. Through the cooperation between the square shaft part and the planar side walls of the left and right sides of the receiving cavity, the surface connection can be achieved when the slider 631 drives the eccentric shaft 632 to move, which improves the stability of the slider 631 driving the eccentric shaft 632 to move.

[0074] When the angle compensation power source 61 drives the slider 631 to move through the angle compensation linear displacement mechanism 62, the slider 631 drives the eccentric shaft 632, the connecting piece 633 and the mold 33 to rotate around the rotation axis 634.

[0075] In this embodiment, two sets of angle-compensating linear displacement mechanisms 62 and angle-compensating rotation mechanisms 63 are disposed on both sides of the mold 33. The angle-compensating power source 61 includes: an angle-compensating mounting frame, a rotary motor, and a synchronous belt drive mechanism. The angle-compensating mounting frame is mounted on the fixed frame 31 of the clamping device. The synchronous belt drive mechanism and the rotary motor are mounted on the angle-compensating mounting frame. The synchronous belt drive mechanism is connected to the rotary motor. The two sets of angle-compensating linear displacement mechanisms 62 are connected to the synchronous belt drive mechanism, which enables one rotary motor to drive two angle-compensating linear displacement mechanisms 62 to move through the synchronous belt drive mechanism. This allows the mold 332 to rotate simultaneously on both sides of the mold 33, improving the synchronicity of the overall rotation of the mold 33 and the stability when it stops.

[0076] The angle-compensated linear displacement mechanism 62 includes a lead screw mechanism. The nut of the lead screw mechanism is installed on the synchronous belt drive mechanism. One end of the lead screw mechanism is engaged with the nut, and the other end is engaged with the slider 631. Through the self-locking function of the lead screw mechanism and the engagement of the rotating mechanism, the linear displacement mechanism can lock the rotating mechanism when not in operation, thereby improving the working stability of the bending equipment.

[0077] In other embodiments, two sets of angle-compensating power sources 61 can be used to drive two sets of angle-compensating linear displacement mechanisms 62 to move respectively. In this case, the angle-compensating power source 61 can be a rotating power source such as a motor, and the angle-compensating linear displacement mechanism 62 can be a transmission mechanism such as a lead screw mechanism or a gear and rack mechanism; or the angle-compensating power source 61 and the angle-compensating linear displacement mechanism 62 can be linear power sources such as a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0078] Secondly, the processing method based on the bending equipment described in the first aspect includes: S100, adjusting the height of at least one clamping device using a height adjustment device 1 according to the required bending angle of the copper busbar bending part, so that the parts of the copper busbar clamped by different clamping devices reach a predetermined height difference.

[0079] Based on the required bending length of the copper busbar, the spacing adjustment device 4 is used to adjust the spacing of the copper busbar clamping parts of different clamping devices along the distribution direction of the clamping devices.

[0080] Based on the required bending angle compensation for the copper busbar bending section, the angle compensation device 6 is used to rotate the clamping device holding the copper busbar to the predetermined angle.

[0081] S200. First, use a clamping device to hold the copper busbar and position it. Then, use other clamping devices to hold the copper busbar so that the clamped part of the copper busbar reaches the predetermined height difference, so that the copper busbar is bent.

[0082] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A bending device, characterized in that, include: The device includes a height adjustment device, a first clamping device, and a second clamping device; at least one of the clamping devices is mounted on the height adjustment device; the first clamping device and the second clamping device are used to clamp the two ends of the bent portion of the copper busbar, respectively; the height adjustment device is used to adjust the height difference when the copper busbar is clamped by different clamping devices.

2. The bending device according to claim 1, characterized in that, It also includes: a third clamping device; the first clamping device, the second clamping device and the third clamping device are arranged in sequence, and at least one of the first clamping device, the second clamping device and the third clamping device is installed on the height adjustment device.

3. The bending device according to claim 2, characterized in that, The second clamping device is mounted on the height adjustment device.

4. The bending device according to claim 1, characterized in that, The clamping device includes: a fixed frame, a clamping power source, and a mold; the clamping power source is installed on the fixed frame, the mold is installed on the clamping power source, and the clamping power source is used to drive the mold to clamp the copper busbar; the clamping power source includes: two hydraulic cylinders, and multiple clamping devices are distributed along the width direction of the clamping power source.

5. The bending device according to claim 1, characterized in that, Also includes: Spacing adjustment device; At least one of the clamping devices is mounted on the spacing adjustment device; the spacing adjustment device is used to adjust the spacing between the copper busbars clamped by different clamping devices.

6. The bending device according to claim 5, characterized in that, The same clamping device is mounted on the height adjustment device or the spacing adjustment device.

7. The bending device according to claim 1, characterized in that, Also includes: Angle compensation device; At least one of the clamping devices is equipped with an angle compensation device, which is used to make the angle of the part of the clamping device that holds the copper busbar adjustable.

8. The bending device according to claim 7, characterized in that, The angle compensation device includes: an angle compensation power source, an angle compensation linear displacement mechanism, and an angle compensation rotation mechanism; the angle compensation power source is mounted on the fixed frame of the clamping device, the angle compensation rotation mechanism is mounted on the mold of the clamping device, and the angle compensation linear displacement mechanism connects the angle compensation power source and the angle compensation rotation mechanism; the mold on which the angle compensation device is mounted is rotatably mounted on the clamping power source; when the angle compensation power source drives the angle compensation linear displacement mechanism to move, the angle compensation rotation mechanism drives the mold to rotate.

9. A bending device according to claim 8, characterized in that, The angle-compensating rotation mechanism includes: a slider, an eccentric shaft, a connector, and a rotating shaft; the slider is mounted on the eccentric shaft, the eccentric shaft is mounted on the connector, and the connector and rotating shaft are mounted on the mold of the clamping device; the slider connects the angle-compensating linear displacement mechanism and the fixed frame of the clamping device, and the rotating shaft connects to the fixed frame of the clamping device; the slider has a receiving cavity, the eccentric shaft is inserted into the receiving cavity, and the eccentric shaft and the upper and lower sides of the receiving cavity are spaced apart by a predetermined distance; when the angle-compensating power source drives the slider to move through the angle-compensating linear displacement mechanism, the slider drives the eccentric shaft, the connector, and the mold to rotate around the rotating shaft.

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