CN217621873U - Wireless charging harness injection mold - Google Patents

Abstract

The utility model discloses a wireless charging harness injection mold, including matched with last mould and lower mould, the one side that goes up the mould and be close to the lower mould and the at least one side that the lower mould is close to in the one side of last mould is equipped with the constant head tank, and the internal perisporium of constant head tank has first shaping face, still is equipped with mobilizable slider in the constant head tank, and the one end that the slider is close to first shaping face has the moving direction and the first shaping face of second shaping face and slider parallel with first shaping face perpendicular. The utility model provides a wireless charging harness injection mold can rectify the shape of connecting the shell fragment before moulding plastics, ensures that the appearance of connecting the shell fragment meets the requirements, can directly mould plastics in the constant head tank after the shaping of connecting the shell fragment is accomplished, has avoided because of the excessive glue that connecting shell fragment and wireless charging harness injection mold do not laminate and produce, need not to purchase alone the plastic tool and carry out the plastic to connecting the shell fragment, effectively reduces wireless charging harness required equipment acquisition cost and cost of labor of production.

Description

Wireless charging harness injection mold

Technical Field

The utility model relates to a wireless charging technology field especially relates to a wireless charging harness injection mold.

Background

As shown in fig. 1, a production process of a wire harness 1 used by a transmitting terminal in a wireless charger of an electronic product such as a mobile phone, a smart watch and the like generally includes riveting a connecting elastic sheet 11, shaping the riveted connecting elastic sheet 11 by using a shaping jig, and placing the shaped connecting elastic sheet 11 into an injection mold to be integrated with a wire 12 by injection molding to obtain the required wire harness 1.

Because its shape probably has certain error with predetermineeing the shape after connecting shell fragment 11 riveting, in order to prevent to lead to producing among the injection molding process and overflow and glue etc. bad because of connecting shell fragment 11 and injection mold do not laminate, carry out the plastic to the plane department of connecting shell fragment 11 before moulding plastics and be the indispensable step in pencil 1 production process, and carry out the plastic to connecting shell fragment 11 and need purchase the corresponding manpower of still arranging except that the plastic tool, lead to wireless production cost who charges with pencil 1 to rise, be unfavorable for wireless charging equipment's popularization.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided is a wireless charging harness injection mold which can reduce the production cost of a wireless charging harness.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a wireless charging harness injection mold, includes matched with and goes up mould and lower mould, it is close to go up the mould the one side of lower mould reaches the lower mould is close to at least one side in the one side of last mould is equipped with the constant head tank, the internal perisporium of constant head tank has first integer face, still be equipped with mobilizable slider in the constant head tank, the slider is close to the one end of first integer face have with the parallel second integer face of first integer face just the moving direction of slider with first integer face is perpendicular.

Furthermore, the upper die is abutted against the sliding block and drives the sliding block to move towards the direction close to the first shaping surface.

Furthermore, one end of the sliding block, which is far away from the first shaping surface, is provided with a first inclined surface, and the upper die is provided with a second inclined surface matched with the first inclined surface.

Furthermore, still be equipped with the stopper in the constant head tank, be equipped with the guide way on the stopper just the length direction of guide way with the moving direction of slider is unanimous, the slider have with guide way matched with spacing portion.

Furthermore, the two opposite sides of the sliding block are respectively provided with the limiting blocks, the two opposite sides of the sliding block are respectively provided with the limiting parts, and the limiting parts are matched with the limiting blocks in a one-to-one correspondence mode.

Furthermore, an elastic piece is further arranged in the positioning groove, the stretching direction of the elastic piece is consistent with the moving direction of the sliding block, one end of two opposite ends of the elastic piece in the stretching direction abuts against one end, far away from the first shaping surface, of the sliding block, and the other end abuts against the inner peripheral wall of the positioning groove.

Furthermore, the sliding block is provided with a positioning hole for accommodating part of the elastic piece.

Furthermore, the upper die is close to one side of the lower die and the lower die is close to at least one side of the upper die, a first wire groove is formed in the first wire groove, the first wire groove is communicated with the positioning groove, and the length direction of the first wire groove is perpendicular to the first shaping surface.

Furthermore, a second line groove is further formed in the sliding block, the length direction of the second line groove is consistent with that of the first line groove, and the second line groove is communicated with the first line groove.

Furthermore, one of the side of the lower die close to the upper die and the side of the upper die close to the lower die is provided with a convex positioning block, and the other side of the lower die is provided with a groove matched with the positioning block.

The beneficial effects of the utility model reside in that: the utility model provides a be equipped with on the wireless charging harness injection mold and carry out the constant head tank of fixing a position and connect the shell fragment and put into after the constant head tank and support with first integer face and hold, be equipped with the slider that can follow the first integer face of perpendicular to direction removal in the constant head tank and the slider is close to the one end of first integer face has the second integer face parallel with first integer face, it places between first integer face and second integer face to connect the shell fragment, and then order about the slider to remove to the direction that is close to first integer face when wireless charging harness injection mold closes the die, connect the shape of shell fragment with the human integer face centre gripping connection shell fragment through first integer face and rectify the shape of connecting the shell fragment, ensure that the appearance of connecting the shell fragment meets the requirements, can directly mould plastics in the constant head tank after the connection shell fragment plastic, avoid because of connecting shell fragment and wireless charging harness injection mold not laminating the excessive glue that produces, and the injection molding of connecting the shell fragment all can accomplish on wireless charging harness injection mold, need not to purchase the plastic tool alone, effectively reduce the required equipment acquisition cost of wireless charging harness production and the cost of labor.

Drawings

FIG. 1 is a schematic diagram of a prior art wiring harness;

fig. 2 is a schematic structural view of the wireless charging harness injection mold of the present invention;

fig. 3 is a cross-sectional view of a wireless charging harness injection mold according to a first embodiment of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is a schematic structural view of a lower mold in the wireless charging harness injection mold of the present invention;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is a schematic structural view of a part of a lower mold in a wireless charging harness injection mold according to a first embodiment of the present invention;

FIG. 8 is an enlarged view at C of FIG. 7;

fig. 9 is a schematic structural view of a part of an upper die in the wireless charging harness injection mold of the present invention;

FIG. 10 is an enlarged view taken at D in FIG. 9;

fig. 11 is a schematic structural view of a slider in a wireless charging harness injection mold according to a first embodiment of the present invention;

fig. 12 is a schematic structural view of another view angle of the slider in the wireless charging harness injection mold according to the first embodiment of the present invention;

fig. 13 is the utility model provides a structural schematic of stopper among wireless charging wire harness injection mold.

Description of the reference symbols:

1. a wire harness; 11. connecting the elastic sheet; 12. a wire rod; 2. an upper die; 21. a second inclined plane; 3. a lower die; 4. positioning a groove; 41. a first shaping surface; 42. profiling grooves; 5. a slider; 51. a second shaping surface; 52. a first inclined plane; 53. a limiting part; 54. positioning holes; 55. a second wire slot; 6. a limiting block; 61. a guide groove; 7. a first wire slot; 8. positioning blocks; 9. and (4) a groove.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 13, a wireless charging harness injection mold includes an upper mold 2 and a lower mold 3, which are matched with each other, at least one of a surface of the upper mold 2 close to the lower mold 3 and a surface of the lower mold 3 close to the upper mold 2 is provided with a positioning groove 4, an inner circumferential wall of the positioning groove 4 is provided with a first shaping surface 41, a movable slider 5 is further disposed in the positioning groove 4, one end of the slider 5 close to the first shaping surface 41 is provided with a second shaping surface 51 parallel to the first shaping surface 41, and a moving direction of the slider 5 is perpendicular to the first shaping surface 41.

From the above description, the beneficial effects of the present invention are: the utility model provides a wireless charging harness injection mold can rectify the shape of connecting shell fragment 11 before moulding plastics, ensure that the appearance of connecting shell fragment 11 meets the requirements, can directly mould plastics in constant head tank 4 after the 11 plastic of connecting shell fragment is accomplished, the excessive glue of having avoided not laminating the production because of connecting shell fragment 11 and wireless charging harness injection mold need not to purchase the plastic tool alone and carry out the plastic to connecting shell fragment 11, effectively reduce required equipment acquisition cost and the cost of labor of 1 production of wireless charging harness.

Further, the upper die 2 abuts against the sliding block 5 and drives the sliding block 5 to move towards the direction close to the first shaping surface 41.

As can be seen from the above description, in the process of matching the upper die 2 and the lower die 3, the slider 5 is driven by the upper die 2 to move toward the first shaping surface 41, so as to automatically shape the connecting elastic sheet 11.

Further, one end of the slider 5 away from the first shaping surface 41 has a first inclined surface 52, and the upper die 2 is provided with a second inclined surface 21 matching with the first inclined surface 52.

As can be seen from the above description, the slider 5 is provided with the first inclined surface 52, and the upper mold 2 is provided with the second inclined surface 21 matching with the first inclined surface 52, when the upper mold 2 matches with the lower mold 3, the second inclined surface 21 abuts against the first inclined surface 52 to drive the slider 5 to slide, and the slider 5 is ensured to be in close contact with the connecting elastic sheet 11 by relative sliding between the first inclined surface 52 and the second inclined surface 21.

Further, still be equipped with stopper 6 in the constant head tank 4, be equipped with guide way 61 on the stopper 6 just the length direction of guide way 61 with the moving direction of slider 5 is unanimous, slider 5 have with guide way 61 matched with spacing portion 53.

As can be known from the above description, the slider 5 is guided to move through the guide groove 61 on the limiting block 6, so that the influence on the quality of the finished wire harness 1 due to the unexpected deformation of the connecting elastic sheet 11 under the extrusion of the slider 5 caused by the deviation when the slider 5 moves is prevented.

Furthermore, the two opposite sides of the sliding block 5 are respectively provided with the limiting blocks 6, the two opposite sides of the sliding block 5 are respectively provided with the limiting parts 53, and the limiting parts 53 are matched with the limiting blocks 6 in a one-to-one correspondence manner.

As can be seen from the above description, the two opposite sides of the slider 5 are respectively provided with the limiting blocks 6 to guide the slider 5 to move, so as to ensure that the second shaping surface 51 of the slider 5 is aligned with the connecting elastic sheet 11.

Furthermore, an elastic element is further arranged in the positioning groove 4, the extending direction of the elastic element is consistent with the moving direction of the slider 5, one of two opposite ends of the elastic element in the extending direction abuts against one end, far away from the first shaping surface 41, of the slider 5, and the other end abuts against the inner peripheral wall of the positioning groove 4.

As can be seen from the above description, the elastic member is arranged to drive the sliding block 5 to abut against the connecting elastic sheet 11 placed in the positioning groove 4 so as to position the connecting elastic sheet 11 before the upper die 2 and the lower die 3 are closed, thereby preventing the connecting elastic sheet 11 from moving unexpectedly during the closing process of the upper die 2 and the lower die 3.

Further, the slider 5 is provided with a positioning hole 54 for accommodating a portion of the elastic member.

As can be seen from the above description, the positioning hole 54 is provided on the slider 5 for the elastic member to be mounted, so as to improve the stability of the connection between the elastic member and the slider 5.

Further, go up mould 2 and be close to the one side of lower mould 3 and lower mould 3 is close to at least one side in the one side of last mould 2 is equipped with first line groove 7, first line groove 7 with constant head tank 4 intercommunication just the length direction of first line groove 7 with first shaping face 41 is perpendicular.

As can be seen from the above description, the first wire chase 7 for positioning the wire 12 is further disposed in the wireless charging harness injection mold, so as to ensure that the relative position between the wire 12 and the connecting elastic piece 11 is kept stable during the injection molding process.

Further, a second wire groove 55 is further formed in the sliding block 5, the length direction of the second wire groove 55 is consistent with that of the first wire groove 7, and the second wire groove 55 is communicated with the first wire groove 7.

As can be seen from the above description, the second wire groove 55 is provided on the slider 5 to avoid the wire 12 from being deformed due to the pressing of the wire 12 during the movement of the slider 5.

Furthermore, one of the one surface of the lower die 3 close to the upper die 2 and the one surface of the upper die 2 close to the lower die 3 is provided with a convex positioning block 8, and the other surface of the lower die is provided with a groove 9 matched with the positioning block 8.

As can be seen from the above description, the positioning block 8 is matched with the groove 9, so that the upper die 2 is aligned with the lower die 3 in matching, and the wireless charging wire harness injection mold is smoothly closed.

Example one

Referring to fig. 1 to fig. 13, a first embodiment of the present invention is: the utility model provides a wireless charging wire harness injection mold for in-process that wireless charging was moulded plastics as an organic whole to connecting shell fragment 11 carries out the plastic and connecting shell fragment 11 and wire rod 12 encloses into the cavity that holds connecting shell fragment 11 and partial wire rod 12 in 1 production process of pencil for wireless charging, ensures that the quality of the wireless charging of obtaining with pencil 1 product meets the requirements.

As shown in fig. 1 to 4, the wireless charging harness injection mold includes an upper mold 2 and a lower mold 3 that are matched with each other, the upper mold 2 and the lower mold 3 are respectively provided with a positioning groove 4 for positioning a connecting elastic sheet 11, the positioning groove 4 of the upper mold 2 is communicated with the positioning groove 4 of the lower mold 3 and encloses a cavity for accommodating the connecting elastic sheet 11, inner peripheral walls of the two positioning grooves 4 are respectively provided with a first shaping surface 41, the two first shaping surfaces 41 are flush, the two first shaping surfaces 41 are simultaneously abutted against one side of the connecting elastic sheet 11, the positioning groove 4 is further provided with a slider 5 that can move along a direction perpendicular to the first shaping surface 41, one end of the slider 5 near the first shaping surface 41 is provided with a second shaping surface 51 parallel to the first shaping surface 41, after the connecting elastic sheet 11 is placed in the positioning groove 4, the part of the connecting elastic sheet 11 to be shaped is located between the first shaping surface 41 and the second shaping surface 51, the connecting elastic sheet 11 is pressed on the upper die 2 and the lower die 3 through the movement of the sliding block 5, the connecting elastic sheet 11 can be clamped by the first shaping surface 41 and the second shaping surface 51, the shape of the connecting elastic sheet 11 can be changed, the shape of the connecting elastic sheet 11 is consistent with the preset shape, the connecting elastic sheet 11 can be directly injected into a cavity defined by the upper die 2, the lower die 3 and the sliding block 5 after shaping is completed, the connecting elastic sheet 11 is prevented from being damaged in the taking-out and transferring processes, meanwhile, a shaping jig is not required to be independently purchased to shape the connecting elastic sheet 11 and a specially-assigned person is not required to carry out shaping operation, and the production cost of the wire harness 1 for wireless charging is effectively saved.

As shown in fig. 7 to 10, the upper die 2 and the lower die 3 are further provided with a contour groove 42, after the wireless charging wire bundle injection mold is closed, the contour groove 42 on the upper die 2 and the contour groove 42 on the lower die 3 enclose a cavity for accommodating a joint of the wire 12 and the connecting elastic piece 11, and a molten plastic material is injected into the contour groove 42 during injection molding to form a plastic shell for wrapping the joint of the wire 12 and the connecting elastic piece 11, so that the wire 12 and the connecting elastic piece 11 are integrated into a whole through injection molding.

Specifically, go up mould 2 and still be equipped with first line groove 7 on the lower mould 3 respectively, first line groove 7 with constant head tank 4 intercommunication and the length direction of first line groove 7 with first shaping face 41 is perpendicular, wireless charging wire harness injection mold closes the back go up mould 2 on first line groove 7 with on the lower mould 3 first line groove 7 intercommunication encloses into the cavity that holds wire rod 12 to fix a position wire rod 12 in the process of moulding plastics, ensure that wire rod 12 can not produce unexpected displacement in the wireless charging wire harness injection mold.

As shown in fig. 4 and 12, in this embodiment, the slider 5 is movably disposed on the lower mold 3, and in a process of closing the wireless charging harness injection mold, the upper mold 2 abuts against the slider 5 and drives the slider 5 to move, so that the second shaping surface 51 is close to the first shaping surface 41 to correct a shape of the connecting elastic piece 11, and further, in a process of closing the wireless charging harness injection mold, the slider 5 is driven by the upper mold 2 to automatically move in a direction close to the connecting elastic piece 11, thereby reducing manual operations and automatically realizing shaping of the connecting elastic piece 11.

Preferably, one end of the slider 5, which is away from the first shaping surface 41, is provided with a first inclined surface 52, the upper die 2 is provided with a second inclined surface 21 which is matched with the first inclined surface 52, in the process of closing the wireless charging harness injection mold, the slider 5 is driven by the upper die 2 to move by the relative sliding between the first inclined surface 52 and the second inclined surface 21, and the slider 5 is in close contact with the connecting elastic piece 11 by the second inclined surface 21 abutting against the first inclined surface 52, so that the shape of the connecting elastic piece 11 is consistent with the preset shape under the action of the slider 5.

Referring to fig. 5, 6 and 12, in order to prevent the connecting elastic piece 11 from moving unexpectedly during the process of closing the mold of the wireless charging harness injection mold, an elastic piece for driving the slider 5 to move in a direction close to the connecting elastic piece 11 is further disposed in the positioning groove 4, a stretching direction of the elastic piece is consistent with a moving direction of the slider 5, one end of two opposite ends of the elastic piece in the stretching direction abuts against one end of the slider 5 away from the first shaping surface 41, and the other end abuts against the inner peripheral wall of the positioning groove 4, so that after the connecting elastic piece 11 is placed in the positioning groove 4, the slider 5 abuts against the connecting elastic piece 11 under the driving of the elastic piece to fix the position of the connecting elastic piece 11 in the positioning groove 4.

Optionally, one end of the slider 5 away from the first shaping surface 41 is provided with a positioning hole 54 for accommodating a part of the elastic element, the elastic element is installed in the positioning hole 54 so as to be stably connected with the slider 5, and the connecting elastic sheet 11 can be conveniently placed in or taken out of the positioning groove 4 by shifting the slider 5.

As shown in fig. 6 and 12, the slider 5 is further provided with a second linear groove 55 penetrating through the slider 5, a length direction of the second linear groove 55 is consistent with a length direction of the first linear groove 7, and the second linear groove 55 is aligned with the first linear groove 7, and during the moving process of the slider 5, a part of the wire 12 extends into the second linear groove 55 to avoid the wire 12 being pressed by the slider 5 to generate an unexpected deformation.

Referring to fig. 5 and 6, in order to improve the production efficiency of the wire harness 1, a plurality of first shaping surfaces 41 are arranged on the inner circumferential wall of the positioning groove 4 at intervals, a plurality of sliding blocks 5 are also arranged in the positioning groove 4, the sliding blocks 5 and the first shaping surfaces 41 are arranged in a one-to-one correspondence manner, so that a plurality of groups of connecting elastic pieces 11 and a corresponding number of wire rods 12 can be placed in the positioning groove 4 for shaping and injection molding at the same time, and a plurality of wire harness 1 products can be obtained at one time.

As shown in fig. 5, fig. 11 and fig. 13, a plurality of limiting blocks 6 for limiting the moving direction of the slider 5 are further arranged in the positioning groove 4, a guide groove 61 is formed in each limiting block 6, the length direction of each guide groove 61 is consistent with the moving direction of the slider 5, a convex limiting portion 53 is formed in the slider 5, the limiting portion 53 extends into the guide groove 61, and the slider 5 is guided to move by the matching of the limiting portion 53 and the guide groove 61, so that the slider 5 is prevented from being shifted to cause the connecting elastic piece 11 to be deformed unexpectedly after being extruded by the slider 5.

In detail, the limit blocks 6 and the slide blocks 5 are alternately arranged in the positioning groove 4, that is, the limit blocks 6 are respectively arranged on two opposite sides of any one of the slide blocks 5, and the limit portions 53 are respectively arranged on two opposite sides of the slide block 5, so as to ensure that the slide block 5 moves along a preset direction and the second shaping surface 51 is aligned with the portion to be shaped of the connecting elastic piece 11.

Example two

Referring to fig. 2, 5 and 9, another technical solution is provided for the structure of the upper mold 2 and the lower mold 3 based on the second embodiment of the present invention, which is different from the first embodiment only in the structure of the upper mold 2 and the lower mold 3.

As shown in fig. 2, 5 and 9, in this embodiment, the lower die 3 is close to one side of the upper die 2 is provided with a convex positioning block 8, the upper die 2 is provided with a groove 9 matched with the positioning block 8, and the wireless charging harness injection mold is matched with a mold so that the positioning block 8 is matched with the groove 9 for positioning, so that the upper die 2 is aligned with the lower die 3, and the upper die 2 is stably attached to the slider 5 after the wireless charging harness injection mold is closed, thereby ensuring the normal operation of the wireless charging harness injection mold.

To sum up, the utility model provides a wireless charging harness injection mold advances line location to connecting shell fragment and wire rod respectively through setting up constant head tank and first wire casing, and wireless charging harness injection mold's last mould orders about the slider removal in the constant head tank through last mould when assembling with the lower mould, connect the shell fragment and rectify the appearance of connecting the shell fragment with the second whole face centre gripping that sets up on the slider with first whole face that sets up on the constant head tank internal perisporium, then mould plastics connecting shell fragment and wire rod as an organic whole and can obtain complete pencil product, make wireless charging harness's connection shell fragment plastic and mould plastics and all can accomplish on wireless charging harness injection mold, ensure the appearance of connecting the shell fragment and predetermine unanimous and with wireless charging harness injection mold laminating, it produces the product harmfully that excessive glue leads to have avoided the in-process of moulding plastics, effectively prevent to connect the shell fragment at last unloading and rotate the in-process impaired deformation, and need not to purchase the plastic alone and arrange the correction work that the shell fragment is connected to the special person, effectively reduce equipment acquisition cost and human cost, do benefit to wireless charging device popularization.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a wireless charging harness injection mold, includes matched with and goes up mould and lower mould, its characterized in that: the mould is close to go up the one side of mould reaches the lower mould is close to at least one side in the one side of mould is equipped with the constant head tank, the internal perisporium of constant head tank has first shaping face, still be equipped with mobilizable slider in the constant head tank, the slider is close to the one end of first shaping face have with the parallel second shaping face of first shaping face just the moving direction of slider with first shaping face is perpendicular.

2. The cordless charging harness injection mold according to claim 1, wherein: the upper die is abutted against the sliding block and drives the sliding block to move towards the direction close to the first shaping surface.

3. The cordless charging harness injection mold according to claim 2, wherein: one end of the sliding block, which is far away from the first shaping surface, is provided with a first inclined surface, and the upper die is provided with a second inclined surface matched with the first inclined surface.

4. The cordless charging harness injection mold according to claim 1, wherein: still be equipped with the stopper in the constant head tank, be equipped with the guide way on the stopper just the length direction of guide way with the moving direction of slider is unanimous, the slider have with guide way matched with spacing portion.

5. The cordless charging harness injection mold according to claim 4, wherein: the relative both sides of slider are equipped with respectively the stopper just the relative both sides of slider have respectively spacing portion, spacing portion with the stopper one-to-one cooperation.

6. The cordless charging harness injection mold according to claim 1, wherein: the positioning groove is internally provided with an elastic piece, the stretching direction of the elastic piece is consistent with the moving direction of the sliding block, one end of two opposite ends of the elastic piece in the stretching direction abuts against one end, far away from the first shaping surface, of the sliding block, and the other end abuts against the inner peripheral wall of the positioning groove.

7. The cordless charging harness injection mold according to claim 6, wherein: the slider is provided with a positioning hole for accommodating part of the elastic piece.

8. The cordless charging harness injection mold according to claim 1, wherein: the upper die is close to one side of the lower die and the lower die is close to at least one side of the upper die, a first wire slot is formed in the first wire slot, the first wire slot is communicated with the positioning groove, and the length direction of the first wire slot is perpendicular to the first shaping surface.

9. The cordless charging harness injection mold according to claim 8, wherein: still be equipped with the second wire casing on the slider, the length direction of second wire casing with first wire casing is unanimous just the second wire casing with first wire casing intercommunication.

10. The cordless charging harness injection mold according to claim 1, wherein: one side of the lower die, which is close to the upper die, and one side of the upper die, which is close to the lower die, are provided with convex positioning blocks, and the other side of the lower die is provided with grooves matched with the positioning blocks.

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