Continuous bending equipment for IGBT (Insulated Gate Bipolar Translator) chip terminal

Abstract

The invention relates to the field of IGBT chip processing, in particular to continuous bending equipment for an IGBT chip terminal. The invention aims to provide an IGBT chip terminal continuous bending device which is reasonable in structure, coordinated in action and high in efficiency. The IGBT chip terminal continuous bending device comprises a machine cabinet, a control panel is installed on a table top of the top of the machine cabinet, and a feeding mechanism and the like are sequentially installed on the table top of the top of the machine cabinet from right to left; the material pushing mechanism conveys the materials from right to left, and the materials are continuously bent through the continuous bending mechanism in the conveying process of the materials. Through cooperation of the feeding mechanism and the pushing mechanism, intermittent feeding and intermittent conveying of materials are achieved; by means of the continuous bending mechanism, bending of a row of pins is achieved at the same time, after bending of the row of pins is completed, the other row of pins can be bent, the working efficiency is improved, and manual intervention is not needed; when the auxiliary bending mechanism bends the second row of pins, the bending quality of the pins can be improved.

Description

Technical Field

[0001] The present invention relates to the field of IGBT chip processing, and in particular to an IGBT chip terminal continuous bending device. Background Art

[0002] Insulated-gate bipolar transistors (IGBTs), as composite power electronic devices, are widely used in inverters, frequency converters, electric vehicles, rail transit, and other fields. During the IGBT module packaging process, chip terminal molding is a key process. Terminal bending, a crucial step in the packaging process, directly impacts subsequent soldering, assembly, and the reliability of the overall electrical connection.

[0003] Currently, the bending process for IGBT chip terminals typically involves manual operation or semi-automatic equipment, performing individual bending. This method suffers from low efficiency, poor consistency, and high labor intensity, making it difficult to meet the demands of high-volume, high-precision production. Furthermore, traditional bending equipment often operates at a single point, making it impossible to simultaneously bend multiple terminals in a row. This results in long processing cycles and complex procedures, impacting overall production efficiency and product yield.

[0004] With the continuous advancement of intelligent manufacturing and automation, the market has placed higher demands on the production efficiency, consistency, and intelligence of IGBT modules. Therefore, there is an urgent need for specialized equipment that can achieve continuous bending and simultaneously bend multiple or entire rows of terminals. This can improve the accuracy and efficiency of terminal forming, reduce manual intervention, and adapt to the development trend of modern production lines.

[0005] In summary, there is an urgent need to develop an IGBT chip terminal continuous bending equipment with a reasonable structure, coordinated movements and high efficiency. Summary of the Invention

[0006] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an IGBT chip terminal continuous bending device with reasonable structure, coordinated action and high efficiency.

[0007] The technical solution is: a continuous bending device for IGBT chip terminals, including a cabinet, a control panel is installed on the table on the top of the cabinet, a loading mechanism, a pushing mechanism and a continuous bending mechanism are installed on the table on the top of the cabinet from right to left, the continuous bending mechanism includes a mounting plate, two mounting plates are in a group, and a total of two groups are installed on the table of the cabinet, a through hole is opened in the middle of the mounting plate, a mounting bearing is rotatably installed in the through hole of the mounting plate, a gear ring is concentrically fixedly installed on the side of one of the mounting bearings, a bending plate is connected between the mounting bearings between the same group of mounting plates, the bending plate on the left is in the middle of the two rows of pins of the material, and the bending plate on the right is in front of the two rows of pins of the material, a rack meshing with it is slidably connected to the table below the gear ring, a third cylinder parallel to the rack is installed on the table below the rack, a second slide rail parallel to the rack is installed on the table above the third cylinder, a second slider is slidably connected to the second slide rail, and a second connecting block is connected between the second slider and the rear end of the rack.

[0008] Further explanation: second buffer blocks are provided on the table surfaces on the front and rear sides of the rack, and the second buffer blocks are also provided to limit the position of the rack moving forward and backward.

[0009] Further explanation, the loading mechanism includes a loading rail, which is installed on the top right side of the machine cabinet countertop through a support plate, a sliding plate is slidably connected to the countertop on the rear side of the loading rail through the support plate, the front side of the sliding plate is fixedly connected to a docking rail, and a first cylinder is fixedly connected to the countertop on the rear side of the sliding plate through the support plate, the telescopic end of the first cylinder is connected to the sliding plate, and a stop block is fixedly connected to the front side of the docking rail.

[0010] Further explanation: the pushing mechanism includes a feed track, and the feed track is horizontally installed on the table on the top of the cabinet through a support plate. A second cylinder is fixedly connected to the bottom of the table below the right side of the feed track, and a first slide rail is fixedly connected to the table above the second cylinder. A first slider is slidably connected to the first slide rail, and a first connecting block is connected between the first slider and the telescopic end of the second cylinder. A sliding rod is fixedly connected to the upper part of the first connecting block, and the sliding rod is slidably connected to the bottom of the feed track. A push rod parallel to the slide rod is installed above the slide rod, and push blocks are rotatably arranged at even intervals on the top of the slide rod, and a torsion spring is provided at the rotating connection of the push block.

[0011] Further explanation: the push block can only be rotated to the left, and the top of the push block is an inclined surface tilted toward the lower right corner.

[0012] To further illustrate, limit blocks are evenly spaced apart on both sides of the front and rear of the conveyor track, and the distance between the limit blocks is less than the length of the material.

[0013] To further illustrate, first buffers are provided on the table surfaces on the left and right sides of the first connecting block.

[0014] Further explanation: it also includes an auxiliary bending mechanism, an auxiliary bending mechanism is arranged on the left rear side of the continuous bending mechanism, the auxiliary bending mechanism is located on the rear side of the second group of mounting plates, the auxiliary bending mechanism includes a fourth cylinder, the fourth cylinder is installed on the table on the rear side of the second group of mounting plates, a connecting plate is slidably connected to the table between the fourth cylinder and the second group of mounting plates through a support plate, the output end of the fourth cylinder is connected to the connecting plate, a notch is provided on the feed track on the front side of the connecting plate, a pad is slidably provided at the notch of the feed track, the pad is rotatably connected to the connecting plate, and a row of positioning holes is provided on the side of the pad close to the material.

[0015] Further explanation: there is also a material receiving tray, which is placed on the machine cabinet table at the lower left side of the feed track.

[0016] Further explanation: there is also a shaping mechanism. A shaping mechanism is provided at the outlet on the left side of the feed track. The shaping mechanism includes a fifth cylinder. The fifth cylinder is installed on the rear side of the outlet on the left side of the feed track. The telescopic end of the fifth cylinder is slidably connected to a shaping plate. The front side of the shaping plate is conical. The shaping plate is located between two rows of bent pins. The top of the feed track in front of the fifth cylinder extends forward to above the bent pins.

[0017] The present invention realizes intermittent feeding and feeding of materials through the cooperation of the feeding mechanism and the pushing mechanism; realizes the bending of a row of pins at the same time through the continuous bending mechanism, and after the bending of one row of pins is completed, the bending of another row of pins can be carried out, thereby improving work efficiency and eliminating the need for manual intervention; the auxiliary bending mechanism can improve the bending quality of the pins when bending the second row of pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure from another perspective of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the components on the table of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the feeding mechanism of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the pushing mechanism of the present invention.

[0023] Figure 6 It is a detailed structural diagram of the pushing mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the continuous bending mechanism and the auxiliary bending mechanism of the present invention.

[0025] Figure 8 For the present invention Figure 7 Schematic diagram of the three-dimensional structure from another perspective.

[0026] Figure 9 For the present invention Figure 7 main view.

[0027] Figure 10 It is a schematic diagram of the three-dimensional structure of the continuous bending mechanism of the present invention.

[0028] Figure 11 For the present invention Figure 10 Schematic diagram of the three-dimensional structure from another perspective.

[0029] Figure 12 This is a diagram of the coordinated assembly of the auxiliary bending mechanism and the continuous bending mechanism of the present invention.

[0030] Figure 13 It is a schematic diagram of the three-dimensional structure of the auxiliary bending mechanism of the present invention.

[0031] Figure 14 It is a schematic diagram of the three-dimensional structure of the fourth cylinder, connecting plate and backing plate of the present invention.

[0032] Figure 15 It is a schematic diagram of the three-dimensional structure of the shaping mechanism of the present invention.

[0033] The components in the accompanying drawings are marked as follows: 1: cabinet, 2: control panel, 3: feeding mechanism, 301: feeding track, 302: sliding plate, 303: docking track, 304: first cylinder, 305: stop block, 4: pushing mechanism, 401: feeding track, 402: second cylinder, 403: first slide rail, 404: first slider, 405: first connecting block, 406: slide rod, 407: push rod, 408: push block, 409: first buffer, 4010: limit block , 5: continuous bending mechanism, 501: third cylinder, 502: second slide rail, 503: second slider, 504: second connecting block, 505: rack, 506: mounting plate, 507: mounting bearing, 508: gear ring, 509: bending plate, 5010: second buffer block, 6: auxiliary bending mechanism, 601: fourth cylinder, 602: connecting plate, 603: pad, 604: positioning hole, 7: receiving tray, 8: shaping mechanism, 801: fifth cylinder, 802: shaping plate. DETAILED DESCRIPTION

[0034] Reference herein to an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of such a phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] Embodiment: An IGBT chip terminal continuous bending device, such as Figures 1-12 As shown, a cabinet 1 is included, a control panel 2 is installed on the table top of the cabinet 1, and a loading mechanism 3, a pushing mechanism 4 and a continuous bending mechanism 5 are installed on the table top of the cabinet 1 from right to left. The pushing mechanism 4 transports the material from right to left, and the material is continuously bent by the continuous bending mechanism 5 during the transportation process.

[0036] like Figure 4 The lifting mechanism 301 is a kind of lifting mechanism that is used for lifting and lowering the material, and the lifting mechanism 302 is a kind of lifting mechanism that is used for lifting and lowering the material. As shown in FIG, the lifting mechanism 301 includes a lifting rail 301, which is installed on the right side of the top of the cabinet table top 1 through a support plate. The sliding plate 302 is slidably connected to the table on the rear side of the loading rail 301 through the support plate, and the front side of the sliding plate 302 is fixedly connected to the docking rail 303 by bolts. The right side of the docking rail 303 and the left side of the loading rail 301 are in the same vertical plane.

[0037] like Figure 5 and Figure 6As shown, the pushing mechanism 4 includes a feeding track 401. The feeding track 401 is horizontally installed on the table top of the cabinet 1 through a support plate. The right side of the feeding track 401 can be docked with the left side of the docking track 303. The bottom of the table below the right side of the feeding track 401 is fixedly connected to the second cylinder 402 by bolts. The table above the second cylinder 402 is fixedly connected to the first slide rail 403 by bolts. The first slide rail 403 and the second cylinder 402 are horizontally installed. A first slider 404 is slidably connected to the first slide rail 403. A first connecting block 405 is connected between the first slider 404 and the telescopic end of the second cylinder 402. A sliding rod 406 is fixedly connected to the upper part of the first connecting block 405. The sliding rod 406 is slidably connected to the bottom of the feeding track 401. A push rod 407 parallel to it is installed above the sliding rod 406. When the second cylinder 402 is extended to the rightmost side, The push rod 407 leaves the feed track 401, and a push block 408 is set at a uniform interval on the top of the slide bar 406. A torsion spring is set at the rotation connection of the push block 408, and the push block 408 can only rotate to the left. The top of the push block 408 is an inclined surface inclined to the lower right corner. First buffers 409 are set on the table on the left and right sides of the first connecting block 405. The first buffer 409 is used to limit the moving distance of the first connecting block 405. Limit blocks 4010 are set at a uniform interval on the front and back sides of the feed track 401. The front and rear positions of the limit blocks 4010 can be adjusted to adjust the conveying space of the feed track 401, so that the material can be conveyed close to the inner wall of the feed track 401, and the distance between the limit blocks 4010 is less than the length of the material. By controlling the extension and retraction of the second cylinder 402, the slide bar 406 and its upper components can be driven to move left and right.

[0038] like Figure 7-12As shown, the continuous bending mechanism 5 includes a mounting plate 506, and the mounting plates 506 are grouped into two groups, and a total of two groups are installed on the table of the cabinet 1. A through hole is opened in the middle of the mounting plate 506, and the center of the through hole is on the same axis parallel to the feed track 401. A mounting bearing 507 is rotatably installed in the through hole of the mounting plate 506, and a gear ring 508 is concentrically fixedly installed on the side of one of the mounting bearings 507. The rotation of the gear ring 508 can drive the mounting bearing 507 to rotate synchronously. The mounting bearings 507 between the same group of mounting plates 506 are connected with a bending plate 509. The bending plate 509 on the left is in the middle of the two rows of pins of the material, and the bending plate 509 on the right is in the middle of the two rows of pins of the material. 509 is located in front of the two rows of pins of the material, and a rack 505 meshing with it is slidably connected to the table below the ring gear 508, and a third cylinder 501 parallel to the rack 505 is installed on the table below the rack 505 by bolts, and a second slide rail 502 parallel to the third cylinder 501 is installed on the table above the third cylinder 501, and a second slider 503 is slidably connected to the second slide rail 502, and a second connecting block 504 is connected between the second slider 503 and the rear end of the rack 505, and second buffer blocks 5010 are provided on the tables on the front and rear sides of the rack 505. The second buffer blocks 5010 are used to limit the position of the rack 505 moving forward and backward, so as to limit the rotation angle of the ring gear 508.

[0039] like Figure 12-14 As shown, an auxiliary bending mechanism 6 is also included. An auxiliary bending mechanism 6 is provided on the rear side of the left portion of the continuous bending mechanism 5. The auxiliary bending mechanism 6 is located on the rear side of the second group of mounting plates 506. The auxiliary bending mechanism 6 includes a fourth cylinder 601. The fourth cylinder 601 is mounted on the table on the rear side of the second group of mounting plates 506. A connecting plate 602 is slidably connected to the table between the fourth cylinder 601 and the second group of mounting plates 506 through a support plate. The output end of the fourth cylinder 601 is connected to the connecting plate 602. The front side of the connecting plate 602 is connected to the connecting plate 602. A notch is provided on the feed track 401, and a pad 603 is slidingly provided at the notch of the feed track 401. The pad 603 is rotatably connected to the connecting plate 602. A row of positioning holes 604 is provided on the side of the pad 603 close to the material. When the material pins are bent for the second time, the pad 603 moves forward under the action of the fourth cylinder 601, and the bent pins of the material are inserted into the positioning holes 604. When the bending plate 509 on the left is bent for the second time, the pad 603 supports the pins to be bent.

[0040] like Figure 1 As shown, a receiving tray 7 is also included. The receiving tray 7 is placed on the table of the cabinet 1 at the lower left side of the feed track 401. The receiving tray 7 consists of a tray body and a slope. The slope is installed above the tray body. The slope is below the left exit of the feed track 401. When the material slides out of the feed track 401, the slope buffers the material and then enters the tray body.

[0041] like Figure 15 As shown, a shaping mechanism 8 is also included. A shaping mechanism 8 is provided at the outlet on the left side of the feed track 401. The shaping mechanism 8 includes a fifth cylinder 801. The fifth cylinder 801 is installed on the rear side of the outlet on the left side of the feed track 401. The telescopic end of the fifth cylinder 801 is slidably connected to a shaping plate 802. The front side of the shaping plate 802 is conical. The shaping plate 802 is located between two rows of bent pins. The top of the feed track 401 in front of the fifth cylinder 801 extends forward to above the bent pins.

[0042] During use: first place the material in the loading track 301, and the material is transported to the left. Then, the first cylinder 304 is controlled to extend, driving the docking track 303 to dock with the loading track 301. Then, the material in the loading track 301 enters the docking track 303. At this time, the first cylinder 304 is controlled to shorten, driving the docking track 303 to dock with the feeding track 401. At this time, the blocking block 305 blocks the left side of the loading track 301 to prevent the material in the loading track 301 from sliding out. At this time, the second cylinder 402 is controlled to shorten, driving the push rod 407 originally outside the feeding track 401 to move to the left, and the push rod 407 pushes the material in the docking track 303. The material moves to the left and enters the feed track 401. After the material enters the feed track 401, the second cylinder 402 is controlled to extend, driving the slide bar 406 and the upper device to move to the right and reset. Then the first cylinder 304 is controlled to extend again to continue the transfer of the material. Under the cooperation of the feeding mechanism 3 and the pushing mechanism 4, the material is continuously transported to the left, and when the second cylinder 402 shortens and drives the slide bar 406 to move to the right, it drives the push block 408 to move to the right. When the push block 408 contacts the material in the feed track 401, the push block 408 swings to the left and does not push the material. The second cylinder 402 extends and drives the slide bar 406 to the left When moving, it drives the push block 408 to move to the left. When the push block 408 moves to the left and contacts the material, it drives the material in the feed track 401 to be transported to the left. When the material is transported to the continuous bending mechanism 5, the right part of the continuous bending mechanism 5 starts to work, and the third cylinder 501 on the right extends, driving the rack 505 on the right to move forward, thereby driving the gear ring 508 on the right to rotate clockwise, thereby driving the mounting bearing 507 and the bending plate 509 to rotate clockwise. At this time, because the bending plate 509 is between the material pins, the bending plate 509 bends the pins behind it, and then controls the third cylinder 501 to shorten and reset, driving the rack 505 to move backward and reset. The gear ring 508, the mounting bearing 507 and the bending plate 509 rotate counterclockwise to reset, and then the material is transported to the left side of the continuous bending mechanism 5, and then the third cylinder 501 on the left is controlled to extend, driving the bending plate 509 on the left to rotate clockwise. Because the bending plate 509 on the left is in front of the material pins, the bending plate 509 rotates clockwise to bend another row of pins. After the other row of pins is bent, the third cylinder 501 on the left is shortened and reset to drive the bending plate 509 to rotate clockwise to reset, and then the material continues to be transported and sent out from the left side of the feed track 401. This is repeated until the pins of all the materials are bent and the control device stops working.

[0043] When the pins of the material are bent for the second time, the material moves to the left part of the continuous bending mechanism 5. At this time, the fourth cylinder 601 is controlled to extend, driving the pad 603 to move forward. The pad 603 fills the gap in the feed track 401. At the same time, a row of pins bent by the material are inserted into the positioning holes 604. Then the continuous bending mechanism 5 bends the pins of the material for the second time. During the bending process of the pins, the top of the pad 603 supports the bent pins so that the pins can be bent to the required angle.

[0044] When the bent material is transported to the front side of the shaping plate 802, the fifth cylinder 801 is controlled to extend, driving the shaping plate 802 to move forward and insert it between the two rows of bent pins, so that the distance between the bent pins is fixed to shape the bent pins. Then the fifth cylinder 801 is controlled to shorten and drive the shaping plate 802 to move backward and reset.

[0045] The above is a detailed introduction to the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the idea of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An IGBT chip terminal continuous bending device, comprising a cabinet (1), a control panel (2) mounted on a table top of the cabinet (1), a loading mechanism (3), a pushing mechanism (4) and a continuous bending mechanism (5) mounted on the table top of the cabinet (1) in sequence from right to left, characterized in that: The continuous bending mechanism (5) includes a mounting plate (506), two mounting plates (506) form a group, and a total of two groups are installed on the table of the cabinet (1). A through hole is opened in the middle of the mounting plate (506), and a mounting bearing (507) is rotatably installed in the through hole of the mounting plate (506). A gear ring (508) is fixedly installed concentrically on the side of one of the mounting bearings (507). The mounting bearings (507) between the same group of mounting plates (506) are connected with a bending plate (509), and the bending plate (509) on the left is located between the two rows of materials. In the middle of the pins, the bending plate (509) on the right side is located in front of the two rows of pins of the material, and a rack (505) meshing with the gear ring (508) is slidably connected on the table below the gear ring (508), and a third cylinder (501) parallel to the rack (505) is installed on the table below the gear ring (508), and a second slide rail (502) parallel to the third cylinder (501) is installed on the table above the third cylinder (501), and a second slider (503) is slidably connected to the second slide rail (502), and a second connecting block (504) is connected between the second slider (503) and the rear end of the rack (505).

2. The IGBT chip terminal continuous bending device according to claim 1, characterized in that: Second buffer blocks (5010) are provided on the table surfaces on both the front and rear sides of the rack (505), and the second buffer blocks (5010) are also provided for limiting the position of the rack (505) moving forward and backward.

3. The IGBT chip terminal continuous bending device according to claim 1, characterized in that: The feeding mechanism (3) comprises a feeding track (301), the feeding track (301) being mounted on the right side of the top of the cabinet (1) table via a support plate, a sliding plate (302) being slidably connected to the table on the rear side of the feeding track (301) via the support plate, a docking track (303) being fixedly connected to the front side of the sliding plate (302), a first cylinder (304) being fixedly connected to the table on the rear side of the sliding plate (302) via the support plate, a telescopic end of the first cylinder (304) being connected to the sliding plate (302), and a material stopper (305) being fixedly connected to the front side of the docking track (303).

4. The IGBT chip terminal continuous bending device according to claim 1, characterized in that: The pushing mechanism (4) includes a feeding track (401), the feeding track (401) is horizontally installed on the table top of the cabinet (1) through a support plate, the bottom of the table below the right side of the feeding track (401) is fixedly connected to the second cylinder (402), the first slide rail (403) is fixedly connected to the table top above the second cylinder (402), the first slider (404) is slidably connected to the first slide rail (403), a first connecting block (405) is connected between the first slider (404) and the telescopic end of the second cylinder (402), the upper part of the first connecting block (405) is fixedly connected to a sliding rod (406), the sliding rod (406) is slidably connected to the bottom of the feeding track (401), a push rod (407) parallel to the sliding rod (406) is installed above the sliding rod (406), and push blocks (408) are evenly spaced and rotatably arranged on the top of the sliding rod (406), and a torsion spring is arranged at the rotation connection of the push block (408).

5. The IGBT chip terminal continuous bending device according to claim 4, characterized in that: The push block (408) can only be rotated to the left, and the top of the push block (408) is an inclined surface inclined toward the lower right corner.

6. The IGBT chip terminal continuous bending device according to claim 4, characterized in that: Limiting blocks (4010) are evenly spaced apart on both sides of the front and rear of the conveying track (401), and the distance between the limiting blocks (4010) is less than the length of the material.

7. The IGBT chip terminal continuous bending device according to claim 4, characterized in that: First buffers (409) are provided on the table surfaces on the left and right sides of the first connecting block (405).

8. The IGBT chip terminal continuous bending device according to claim 4, characterized in that: The invention also includes an auxiliary bending mechanism (6), which is provided at the rear left side of the continuous bending mechanism (5), and is located at the rear side of the second group of mounting plates (506). The auxiliary bending mechanism (6) includes a fourth cylinder (601), which is installed on the table at the rear side of the second group of mounting plates (506). A connecting plate (602) is slidably connected to the table between the fourth cylinder (601) and the second group of mounting plates (506) through a support plate. The output end of the fourth cylinder (601) is connected to the connecting plate (602), and a notch is provided on the feed track (401) on the front side of the connecting plate (602). A pad (603) is slidably provided at the notch of the feed track (401). The pad (603) is rotatably connected to the connecting plate (602), and a row of positioning holes (604) is provided on the side of the pad (603) close to the material.

9. The IGBT chip terminal continuous bending device according to claim 4, characterized in that: It also includes a material receiving tray (7), which is placed on the table of the cabinet (1) at the lower left side of the feeding track (401).

10. The IGBT chip terminal continuous bending device according to claim 6, characterized in that: The invention also includes a shaping mechanism (8), which is provided at the outlet of the left portion of the feed track (401). The shaping mechanism (8) includes a fifth cylinder (801), which is installed at the rear side of the outlet of the left portion of the feed track (401). The telescopic end of the fifth cylinder (801) is slidably connected to a shaping plate (802). The front side of the shaping plate (802) is conical. The shaping plate (802) is located between two rows of bent pins. The top of the feed track (401) in front of the fifth cylinder (801) extends forward to above the bent pins.

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