CN216250400U - Winding and rubber-coating machine for frameless coil - Google Patents

Abstract

The utility model discloses a frameless coil winding and encapsulating machine, wherein a blanking mechanism is arranged below a winding jig, an encapsulating mechanism capable of carrying out closed-loop encapsulation and winding on a hollow coil is arranged on the discharging side of the winding jig, and after the coil winding is finished, the blanking mechanism is taken down from the winding jig and transferred to the position below the encapsulating mechanism to carry out encapsulation treatment on the coil by the encapsulating mechanism, so that the automatic winding and encapsulation of the hollow coil are realized, and the production efficiency and the quality of the coil are improved.

Description

Winding and rubber-coating machine for frameless coil

Technical Field

The utility model relates to the technical field of winding equipment, in particular to a frameless coil winding and rubber coating machine.

Background

The existing hollow coil winding machine needs to use a winding jig to wind coils. The winding jig generally comprises two A moulds and B moulds that mutually support, during the wire winding, through tool clutching mechanism with A mould and B mould compound die, form the inner frame, manual with the end of a thread winding on the post of smelting tool, the motor drive tool is rotatory, make the wire rod wind on the boss between A mould and B mould, after the winding is accomplished, manual with the adhesive tape insert, the rubber coating, again through manual with tool A mould and B mould separately, directly take out on winding post and the boss on the A mould with the boneless coil that the coiling formed. The winding of the hollow coil is usually finished by manually winding the coil head and coating the coil with rubber, and finished coils are unloaded, so that the problems of low efficiency, difficulty in ensuring quality, high labor cost, safety risk and the like exist.

Aiming at the problem that the existing rubber coating machine structure can only solve the outer side rubber coating, the applicant applies a rubber coating mechanism and a rubber coating machine of a stator coil in 2020, 06, 22 (authorized announcement in 2020, 12, 15), the rubber coating mechanism can realize that a rubber tape is pasted on the outer side surface and the inner ring surface of a hollow coil to form closed-loop rubber coating winding on a hollow coil body, and the problem that the hollow coil can only be coated with rubber on the outer side is solved.

There is currently no apparatus that can simultaneously automatically wind and encapsulate this type of frameless coil.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model mainly aims to provide a frameless coil winding and rubber coating machine, aiming at realizing automatic winding and rubber coating of a hollow coil and improving the production efficiency and quality.

In order to achieve the purpose, the bobbin-free coil winding and rubber coating machine provided by the utility model comprises a main frame, a first mounting seat arranged on the main frame and a second mounting seat movably arranged in parallel relative to the first mounting seat, wherein a winding jig and a jig clutch mechanism are arranged between the first mounting seat and the second mounting seat, a die A of the winding jig is arranged on the first mounting seat, and a die B of the winding jig is arranged on the second mounting seat;

one side of the second mounting seat, which is deviated from the first mounting seat, is provided with a rubber coating mechanism capable of carrying out closed-loop rubber coating winding on a hollow coil, a blanking mechanism is arranged below the winding jig and the rubber coating mechanism, and the blanking mechanism takes down the coil from the winding jig and transfers the coil to the lower part of the rubber coating mechanism after the coil is wound, so that the rubber coating mechanism can carry out rubber coating treatment on the coil.

Optionally, a plurality of winding jigs are arranged between the first mounting seat and the second mounting seat along the Y axis;

the rubber coating mechanism is movably arranged along the Y axis, and the blanking mechanism is provided with material clamping manipulators corresponding to the winding jigs one to one.

Optionally, the blanking mechanism includes a translation assembly arranged along an X axis and a lifting seat arranged on the translation assembly, and the material clamping manipulator is arranged on the lifting seat.

Optionally, the left side and the right side of the rubber coating mechanism are respectively provided with a first auxiliary clamping manipulator and a second auxiliary clamping manipulator which are used for clamping the left upper corner and the right upper corner of the coil.

Optionally, a discharging manipulator is arranged on the left side of the rubber coating mechanism.

Optionally, a triaxial cable arranging mechanism is arranged on the main frame, a front side plate is arranged on a Z-axis lifting assembly of the main frame, the front side plate is provided with line mouths in one-to-one correspondence with the winding jig, and one side of each line mouth is provided with a pair of shearing and clamping integrated pliers movably arranged along the Z axis.

Optionally, a base is arranged at one end, butted with the mold B, of the rotating shaft of the mold a, a U-shaped fixed block and a movable block opposite to the fixed block are arranged on the base, a first spring is arranged between the movable block and the fixed block, the upper end of the movable block is inserted into and penetrates through a U-shaped opening of the fixed block, and a protrusion corresponding to the end of the movable block is arranged on the fixed block;

and a push rod pointing to the mold A is arranged on a rotating shaft of the mold B, the push rod and the rotating shaft of the mold B are coaxially arranged, a round hole for the push rod to insert is formed in the base, and part of the movable block is exposed outwards from the round hole.

Optionally, a first accommodating groove coaxially arranged with the rotating shaft of the mold a is concavely arranged on the rotating shaft of the mold a, and the first spring is arranged in the first accommodating groove;

the ejector rod is provided with a second containing groove which is coaxial with the ejector rod in an inwards concave mode, and a second spring and a pressure head are arranged in the second containing groove.

Optionally, a first baffle is arranged on the base, a first wrapping post pointing to the B-die is arranged on the first baffle, and two second wrapping posts arranged at intervals are vertically arranged on the upper end surface of the first baffle;

and a second baffle corresponding to the first baffle is arranged on the rotating shaft of the B die, and a through hole for the first winding post to pass through is formed in the second baffle.

Optionally, one surface of the second mounting seat, which faces away from the first mounting seat, is provided with a rotation stopping plate movably arranged along a Z axis, the rotation stopping plate is provided with a rotation stopping opening corresponding to each B mold, and a rotation shaft of each B mold penetrates out of the second mounting seat and is inserted into the rotation stopping opening.

According to the utility model, the blanking mechanism is arranged below the winding jig, the encapsulation mechanism capable of carrying out closed-loop encapsulation winding on the hollow coil is arranged on the discharge side of the winding jig, and after the coil is wound, the blanking mechanism is taken down from the winding jig and transferred to the position below the encapsulation mechanism for encapsulation processing of the coil by the encapsulation mechanism, so that automatic winding and encapsulation of the hollow coil are realized, and the production efficiency and quality of the coil are improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic top view of a winding jig and a blanking mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic front view of a encapsulation mechanism and a blanking mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a blanking mechanism according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a encapsulation mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic front view of a body of a encapsulation mechanism according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a first auxiliary clamping robot, a second auxiliary clamping robot and a blanking robot according to an embodiment of the present invention;

FIG. 8 is a schematic front view of a triaxial cable mechanism according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of a winding jig according to an embodiment of the present invention;

FIG. 10 is a schematic top view of a winding jig according to an embodiment of the present invention;

FIG. 11 is a cross-sectional view taken at A-A of FIG. 10;

FIG. 12 is a schematic view of a winding process of the winding jig of the present invention, in which the winding jig cooperates with the holder and the cutting clamp;

fig. 13 is a schematic structural diagram of a rotation stop plate according to an embodiment of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7 of the specification, in an embodiment of the present invention, a frameless coil winding and wrapping machine is provided, which includes a main frame 100, a first bracket 110 and a second bracket 120 disposed on the main frame 100. A first mounting seat 130 is arranged on the front side plate 111 of the first bracket 110, a second mounting seat 140 movably arranged along the X-axis is arranged on the upper side plate 121 of the second bracket 120, and a winding jig and a jig clutch mechanism 150 are arranged between the first mounting seat 130 and the second mounting seat 140. The a die 310 of the winding jig is disposed on the first mounting base 130, the B die 320 of the winding jig is disposed on the second mounting base 140, and the jig clutch mechanism 150 is a driving cylinder, one end of which is connected to the front side plate 111 of the first bracket 110, and the other end of which is connected to the second mounting base 140, and can drive the B die 320 and the a die 310 to be closed or separated. A first motor 330 is disposed on the back of the front plate 111 of the first bracket 110, and the first motor 330 is in transmission connection with the rotating shaft 311 of the a die 310 through a belt to drive the clamped winding jig to wind the coil 600.

Still set up rubber coating mechanism 400 on the last curb plate 121 of second support 120, this rubber coating mechanism 400 is located the one side that deviates from first mount pad 130 of second mount pad 140, specifically is the rubber coating mechanism that applicant filed in 2020 month 06 and 22 of 2020 entitled as a stator coil's rubber coating mechanism and rubber coating machine, and it can carry out closed loop rubber coating winding to hollow coil, and the rubber coating principle of rubber coating mechanism 400 is seen in this utility model patent (grant publication number is CN 212163113U) for details, and detailed description is not repeated here.

The blanking mechanism 500 is arranged below the winding jig and the encapsulation mechanism 400, after the winding of the coil 600 on the winding jig is completed, the jig clutch mechanism 150 separates the die A310 and the die B320 of the winding jig, and the blanking mechanism 500 can clamp and transfer the coil 600 to the lower side of the encapsulation mechanism 400, so that the encapsulation mechanism 400 encapsulates the coil 600. From this to make wire winding rubber coating machine can realize the automatic coiling and the rubber coating to coil 600, improve the production efficiency and the quality of coil.

Preferably, in the present embodiment, the winding jig between the first mounting base 130 and the second mounting base 140 is provided in plurality and arranged along the Y-axis, and the feeding mechanism 500 is provided with the material clamping manipulators 550 corresponding to the winding jig one to one. A movable plate 122 and a rack 125 arranged along the Y axis are disposed on the upper side plate 121 of the second bracket 120, and the movable plate 122 is movably disposed on the upper side plate 121 of the second bracket 120 by a first slide rail 123 arranged along the Y axis. The movable plate 122 is provided with a second motor 124, an output shaft of the second motor 124 is provided with a transmission gear engaged with the rack 125, and when the second motor 124 drives the transmission gear to rotate, the movable plate 122 can move back and forth along the Y axis on the upper side plate 121. The encapsulation mechanism 400 is provided in two parts and is disposed on the plate of the movable plate 122.

From this to make winding rubber coating machine can once accomplish the coiling of a plurality of coils 600, and after a plurality of coils 600 coiling were accomplished, the left and right sides of coil 600 on the wire winding tool that corresponds with it is cliied by material clamping manipulator 550, and shift out and deliver to rubber coating mechanism 400 department from the wire winding tool, two rubber coating mechanisms 400 carry out the rubber coating simultaneously to two coils 600 that have a certain interval and handle, and move on new coil 600 and carry out the rubber coating after the rubber coating is accomplished, until accomplishing the rubber coating work of whole coils 600.

In this embodiment, the winding of the plurality of coils 600 can be completed at one time by using the plurality of winding jigs, so that the winding efficiency of the coils 600 is improved; the encapsulation mechanism 400 is movably arranged, so that encapsulation of a plurality of coils 600 can be conveniently completed through one encapsulation mechanism 400, and the structure of the winding encapsulation machine is simplified.

In this embodiment, the blanking mechanism 500 includes a translation assembly disposed along the X-axis and a lifting seat 530 disposed on the translation assembly, and the material clamping robot 550 is arranged along the Y-axis and disposed on the lifting seat 530. The translation assembly comprises a bottom plate 510 and a screw rod 520, the bottom plate 510 is movably arranged on the main frame 100 through two second sliding rails 511 arranged along the X axis, the screw rod 520 is arranged along the X axis and fixed on the main frame 100, the bottom plate 510 is connected to a screw rod seat of the screw rod 520, and the screw rod 520 can drive the bottom plate 510 to move back and forth along the X axis when rotating. The elevating base 530 is disposed on the base plate 510. The lifting end of the lifting base 530 is provided with a carrier plate 540 parallel to the bottom plate 510, and the material clamping robot 550 is arranged along the Y-axis and disposed on the carrier plate 540. During blanking, the lifting seat 530 drives the clamping manipulator 550 to ascend to the height of the coil 600, so as to take the coil 600 off the winding jig and descend to avoid the second mounting seat 140 when the coil 600 is transferred; after reaching the lower part of the encapsulation mechanism 400, the lifting seat drive coil 600 ascends to the position where the encapsulation mechanism 400 can encapsulate to encapsulate.

Preferably, a first auxiliary gripping manipulator 420 and a second auxiliary gripping manipulator 430 for gripping the left and right upper corners of the coil are respectively provided on the left and right sides of the taping mechanism body 410, a driving cylinder 421 of the first auxiliary gripping manipulator 420 is provided on an outer plate of the third driving assembly of the taping mechanism body 410, and a driving cylinder 431 of the second auxiliary gripping manipulator 430 is provided on a linear block with a drawing jig of the taping mechanism body 410. Therefore, during encapsulation, when the clamping manipulator 550 clamps the ring bodies on the left side and the right side of the coil 600, the first auxiliary clamping manipulator 420 and the second auxiliary clamping manipulator 430 clamp the left upper corner and the right upper corner of the coil, so as to avoid the phenomenon that the encapsulation mechanism 400 cannot smoothly encapsulate due to the fact that the coil 600 is loose.

Further, a discharging manipulator 440 is arranged on the left side of the encapsulation mechanism 400 and is movably arranged on the encapsulation mechanism body 410 through a first driving cylinder 441 arranged along the Z axis and a second driving cylinder 442 arranged along the X axis, and when the encapsulation mechanism body 410 completes encapsulation and moves to the next coil, the discharging manipulator 440 can be driven to move downwards to take the wrapped coil 600 off and move out of the clamping manipulator 550.

As shown in fig. 1 and 8, in this embodiment, a triaxial cable arranging mechanism 200 is disposed on the upper side plate 121 of the first support 110, a front panel 210 is disposed on a Z-axis lifting assembly of the triaxial cable arranging mechanism 200, a line mouth block 211 corresponding to the winding jig is disposed on the front panel 210, a line mouth 2111 is disposed on the line mouth block 211, and a clamp 212 is disposed at one side of each line mouth block 211. The body of the cutting and clamping integrated clamp 212 is movably arranged on the front panel 210 through a third slide rail arranged along the Z axis, the upper end part of the body is provided with a switching strip 213, the upper end of the switching strip 213 is provided with a lifting cylinder 214, and the lifting cylinder 214 can drive the cutting and clamping integrated clamp 212 to lift along the Z axis.

As shown in fig. 9-12, in the present embodiment, a base 312 is disposed at an end of the a mold 310 where the rotating shaft 311 is abutted to the B mold 320, a first baffle 316 is disposed on a surface of the base 312 facing the B mold 320, a first winding post 317 pointing to the B mold 320 is disposed on the first baffle 316, and two second winding posts 318 disposed at intervals are vertically disposed on an upper end surface of the first baffle 316. The base 312 is provided with a U-shaped fixed block 313 and a movable block 314 opposite to the fixed block 313, the movable block 314 penetrates through the base 312 in the vertical direction, the upper end part of the movable block 314 is inserted into and penetrates through the U-shaped opening of the fixed block 313, the fixed block 313 is provided with a protrusion 313a corresponding to the end part of the movable block 314, and the protrusion 313a and the upper end part of the movable block 314 form a clamping opening. A first receiving groove is formed in the rotating shaft 311 of the a-mold 310 in a recessed manner, the first receiving groove is provided with a first spring 315 therein, one end of the first spring 315 abuts against the bottom of the first receiving groove, and the other end abuts against the movable block 314. The first spring is in a compressed state and always applies an elastic force to the movable block 314, so that the upper end of the movable block 314 is far away from the protrusion 313a on the fixed block 313, i.e. the clamp opening is kept in a normally open state.

A second shutter 323 corresponding to the first shutter 316 and a push rod 322 coaxial therewith are provided on the rotary shaft 321 of the B die 320. The second blocking plate 323 is formed with a through hole for the first winding post 317 to pass through. The base 312 is provided with a round hole, and when the winding jig is closed, the push rod 322 is inserted into the round hole and pressed on the movable block 314, and the movable block 314 is forced to move towards the fixed block 313. A second receiving groove is concavely formed at an end of the push rod 322, and a second spring 3221 and a pressure head 3222 are disposed in the second receiving groove. The second spring 3221 is in a compressed state, and always applies an elastic force to the pressure head 3222, the elastic force pointing to the outside of the second accommodating groove, so that the end portion of the pressure head 3222 penetrates out of the second accommodating groove.

As shown in fig. 12(a) to 12(e), the winding process of the winding jig provided by the present invention is:

firstly, moving the wire 600a clamped by the shearing and clamping integrated clamp 212 to a clamping opening, closing the A die 310 and the B die 320 through the jig clutch mechanism 150 after moving the wire down to the clamping opening, enabling the ejector rod 322 to penetrate through the circular hole and apply pressure to the movable block 314, enabling the upper end part of the movable block 314 to move towards the protrusion 313a of the fixed block 313, clamping the wire 600a in the clamping opening, and enabling the first baffle plate 316, the first winding post 317 and the second baffle plate 323 to form a skeleton-like structure to prepare for winding; after the wire 600a is clamped, the wire end clamped by the integrated shearing and clamping pliers 212 is loosened, and the integrated shearing and clamping pliers 212 is driven to ascend to wait for the next instruction; meanwhile, the coil 2111 is driven by the triaxial cable arrangement mechanism 200 to drive the wire 600a to move towards the second winding posts 318 at the lower side and wind around the two second winding posts 318 for 1-2 circles clockwise and then move in the winding area between the first baffle 316 and the second baffle 323; then, the a die 310 is driven to rotate clockwise and the B die 320 is driven to rotate for coil winding, and the nozzle 2111 is driven to perform wire arrangement in the winding process; after the coil winding is completed, the coil mouth 2111 is driven to move towards the second winding post 318 on the upper side, and is wound around the two second winding posts 318 for 2-3 circles in the clockwise direction, and then is stretched for a certain length along the Y axis, and then the shearing and clamping integrated clamp 212 is driven to move downwards to shear and clamp the tail end of the wire 600 a; finally, the driving cutting and clamping integrated clamp 212 is reset together with the coil mouth 2111, the clamp is opened through the clamp clutch mechanism 150, and at the moment, the movable block 314 is ejected from the fixed block 313 under the action of the first spring 315 so as to automatically release the coil end, so that the material clamping manipulator 550 can take out the wound coil 600.

Through adopting the winding tool that above-mentioned A mould 310 and B mould 320 constitute, can be at automatic centre gripping end of a thread when the compound die is wound to automatic unclamp the end of a thread when the die sinking, need not to fix the end of a thread through the clamping and cutting mechanism, can not produce useless end of a thread at the winding in-process, can utilize wire rod 600a as far as possible, avoid extravagant.

Moreover, by arranging the pressing head 3222 of the second spring 3221 in the push rod 322, when the push rod 322 pushes against the movable block 314, the second spring 3221 is compressed, so that the second spring 3221 applies a reaction force to the movable block 314, and the movable block 314 can effectively press the wire 600a in the clamping opening, and cannot be easily loosened.

And, two second winding posts 318 are vertically arranged on the first baffle 316 at intervals, so as to control the length of the head/tail of the coil.

As shown in fig. 13, in the present embodiment, a rotation stopping plate 141 movably disposed along the Z axis is disposed on a surface of the second mounting base 140 away from the first mounting base 130, a rotation stopping opening 141a corresponding to each B mold 320 is disposed on the rotation stopping plate 141, and a rotation shaft of the B mold 320 penetrates through the second mounting base 140 and is inserted into the rotation stopping opening 141 a. The rotation stop port 141a has a bayonet shape corresponding to the outer contour of the end of the rotation shaft of the B-die 320 and a circular port having a diameter larger than the outer contour of the end of the rotation shaft, and a driving cylinder for driving the rotation stop plate 141 to move up and down is provided in the second mounting seat 140. After the winding is completed, the rotation stopping plate 141 can be driven to descend by the driving cylinder to clamp the B die 320, the B die 320 is limited to be incapable of rotating, and therefore the avoidance holes in the first winding post 317 and the second baffle 323 can be effectively aligned when the die is closed next time.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A frameless coil winding and rubber coating machine comprises a main frame, a first mounting seat arranged on the main frame and a second mounting seat movably arranged in parallel relative to the first mounting seat, wherein a winding jig and a jig clutch mechanism are arranged between the first mounting seat and the second mounting seat, a die A of the winding jig is arranged on the first mounting seat, and a die B of the winding jig is arranged on the second mounting seat; it is characterized in that the preparation method is characterized in that,

one side of the second mounting seat, which is deviated from the first mounting seat, is provided with a rubber coating mechanism capable of carrying out closed-loop rubber coating winding on a hollow coil, a blanking mechanism is arranged below the winding jig and the rubber coating mechanism, and the blanking mechanism takes down the coil from the winding jig and transfers the coil to the lower part of the rubber coating mechanism after the coil is wound, so that the rubber coating mechanism can carry out rubber coating treatment on the coil.

2. The frameless coil winding and gluing machine as claimed in claim 1, wherein the winding jigs between the first mounting seat and the second mounting seat are plural and arranged along the Y axis;

the rubber coating mechanism is movably arranged along the Y axis, and the blanking mechanism is provided with material clamping manipulators corresponding to the winding jigs one to one.

3. The frameless coil winding and gluing machine as claimed in claim 2, wherein the blanking mechanism comprises a translation assembly disposed along the X-axis and a lifting seat disposed on the translation assembly, and the material clamping manipulator is disposed on the lifting seat.

4. The frameless coil winding and gluing machine as claimed in claim 1, wherein the first auxiliary gripping robot and the second auxiliary gripping robot for gripping the left and right upper corners of the coil are respectively provided on the left and right sides of the gluing mechanism.

5. The frameless coil winding and gluing machine as claimed in claim 4, wherein a discharging manipulator is arranged at the left side of the gluing mechanism.

6. A frameless coil winding and gluing machine as defined in any one of claims 1-5, wherein the main frame is provided with a three-axis winding mechanism, the Z-axis lifting assembly is provided with a front plate, the front plate is provided with a wire nozzle corresponding to the winding jig one by one, and one side of each wire nozzle is provided with a cutting and clamping integrated clamp movably arranged along the Z-axis.

7. The frameless coil winding and gluing machine as claimed in claim 6, wherein a base is provided at one end of the A die where the rotation axis is butted with the B die, a U-shaped fixed block and a movable block opposite to the fixed block are provided on the base, a first spring is provided between the movable block and the fixed block, the upper end of the movable block is inserted into and passes through the U-shaped opening of the fixed block, and a protrusion corresponding to the end of the movable block is provided on the fixed block;

and a push rod pointing to the mold A is arranged on a rotating shaft of the mold B, the push rod and the rotating shaft of the mold B are coaxially arranged, a round hole for the push rod to insert is formed in the base, and part of the movable block is exposed outwards from the round hole.

8. The frameless coil winding and gluing machine of claim 7, wherein the rotating shaft of the mold A is concavely provided with a first accommodating groove coaxially arranged with the rotating shaft, and the first spring is arranged in the first accommodating groove;

the ejector rod is provided with a second containing groove which is coaxial with the ejector rod in an inwards concave mode, and a second spring and a pressure head are arranged in the second containing groove.

9. The frameless coil winding and gluing machine of claim 8, wherein the base is provided with a first baffle plate, the first baffle plate is provided with a first winding post pointing to the B die, and two second winding posts are vertically arranged at intervals on the upper end surface of the first baffle plate;

and a second baffle corresponding to the first baffle is arranged on the rotating shaft of the B die, and a through hole for the first winding post to pass through is formed in the second baffle.

10. The frameless coil winding and gluing machine as claimed in claim 1, wherein a rotation stopping plate movably arranged along the Z-axis is arranged on a surface of the second mounting seat facing away from the first mounting seat, a rotation stopping opening corresponding to each B-die is arranged on the rotation stopping plate, and a rotation shaft of the B-die penetrates out of the second mounting seat and is inserted into the rotation stopping opening.

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