CN216683246U

CN216683246U - Flat wire rod cladding mould

Info

Publication number: CN216683246U
Application number: CN202122927276.2U
Authority: CN
Inventors: 施兴洲; 黄荣和; 江建龙
Original assignee: Heyuan Keshun Insulating Material Co ltd
Current assignee: Heyuan Keshun Insulating Material Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-06-07
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses a flat wire cladding die, which comprises an inner die and an outer die, wherein an inner die opening is formed in the inner die, and the outline of the inner die opening is arranged in a dumbbell shape; the outer die is arranged on the outer side of the inner die, an outer die opening is formed in the position, corresponding to the inner die opening, of the outer die, and the outline of the outer die opening is rectangular. The structure of the flat wire wrapping mold is improved, the thickness uniformity of the wrapping layer of the flat wire is improved, a good wrapping effect is achieved, and the qualification rate of finished products is improved.

Description

Flat wire rod cladding mould

Technical Field

The utility model relates to the technical field of rubber coating dies, in particular to a flat wire coating die.

Background

At present, in some application scenarios, because of the mechanical, structural and functional requirements of the product, the shape of the core material may use a flat structure, for example: the water wiping function core piece-plastic coated reed of the boneless wiper system used for passenger vehicles or commercial vehicles is coated with PET (polyethylene terephthalate), the thickness of the coating layer is 0.05-0.1 mm, and the core material is a flat steel strip with the thickness of 0.5-1.2 mm and the width of 5-15 mm based on the strength, rigidity and function requirements of a supporting rubber piece; in addition, the hairpin insulated electromagnetic wire applied to the new energy drive motor has the advantages that the energy density of unit volume is improved (higher groove filling rate), the skin effect of electrons and the surface heat dissipation requirements are met, the copper conductor for current carrying is optimally selected to be flat, and then the surface is subjected to paint coating insulation and high-performance insulation plastic material extrusion plastic-coated reinforced insulation or direct extrusion plastic-coated insulation.

The existing flat wire rod coating die comprises an inner die, an outer die and the like, the angle area of a coating layer has the defects of uneven thickness and the like, the coating effect is general, and the product percent of pass is low.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a flat wire wrapping mold, which aims to improve the uniformity of the thickness of a wrapping layer of a flat wire, achieve a better wrapping effect and improve the qualification rate of a finished product.

In order to achieve the above object, the present invention provides a flat wire rod covering mold, including:

the inner die is provided with an inner die opening, and the outline of the inner die opening is arranged in a dumbbell shape; and

the outer die is arranged on the outer side of the inner die, an outer die opening is formed in the position, corresponding to the inner die opening, of the outer die, and the outline of the outer die opening is rectangular.

Optionally, the profile of the inner die orifice comprises a first profile section and a second profile section which are symmetrically arranged, and the first profile section and the second profile section both comprise a parallel section located in the middle of the first profile section, two avoidance sections respectively connected with two ends of the parallel section, and two transition sections respectively connected with the two avoidance sections;

the avoidance section extends along the direction of a symmetrical line far away from the first profile section and the second profile section so as to form the dumbbell-shaped inner die orifice.

Optionally, the length of the parallel section is adapted to be greater than one third of the width of the flat wire and less than two thirds of the width of the flat wire.

Optionally, the maximum distance between the avoidance segment of the first profile segment and the opposite avoidance segment of the second profile segment is 0.1-0.3 mm greater than the distance between the parallel segment of the first profile segment and the parallel segment of the second profile segment.

Optionally, the transition section is arc-shaped, and the radius of the fillet of the transition section is 0.3-0.5 mm.

Optionally, four corners of the outline of the outer die opening are arc-shaped, and the radius of the fillet is 0.3-0.5 mm.

Optionally, the outer peripheral wall of the inner die forms a first surface of revolution, which is conical.

Optionally, the outer peripheral wall of the outer die forms a second surface of revolution, the second surface of revolution being cylindrical.

Optionally, the flat wire covering die further comprises two machine body fixing blocks, and the two machine body fixing blocks are arranged on two sides of the inner die and the outer die and used for being fixed on an extruder head of an extrusion molding machine.

Optionally, the flat wire wrapping die further comprises a flow divider, the flow divider is arranged between the two machine body fixing blocks and surrounds one end of the inner die, and the flow divider is communicated with the inner die.

In the technical scheme of the utility model, the flat wire wrapping die comprises an inner die and an outer die, wherein an inner die opening is formed in the inner die, and the outline of the inner die opening is arranged in a dumbbell shape; the outer die is arranged on the outer side of the inner die, an outer die opening is formed in the position, corresponding to the inner die opening, of the outer die, and the outline of the outer die opening is rectangular. The outline of the inner die opening is dumbbell-shaped, so that the coating thickness precision of the wire rod can be improved, the processing difficulty can be reduced, and the core material can be prevented from shape errors or processing peaks or burrs at the corners when passing through the inner die opening, particularly the core material with a primary coating or plating layer is provided, and the coating or plating layer is likely to be accumulated at the corners; in addition, the avoidance areas at the two ends and the space formed by the core materials can realize the pressure in the extrusion die cavity in the direction opposite to the direction of the core materials, and the core materials can be more favorably taken out by the movement of the core materials to extrude the molten coating layer materials to form the coating layer. Therefore, the flat wire coating die improves the uniformity of the coating layer thickness of the flat wire, achieves better coating effect, and further improves the qualification rate of finished products

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a flat wire covering mold according to an embodiment of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a cross-sectional view of a portion of the components of an embodiment of the flat wire coating die of the present invention;

FIG. 4 is a schematic view of the inner die orifice of the inner die of one embodiment of the flat wire covering die of the present invention;

fig. 5 is a profile view of an outer die opening of an outer die in an embodiment of the flat wire covering die of the utility model.

The reference numbers illustrate:

10. an inner mold; 20. an outer mold; 10a, an inner die opening; 10b, positioning a notch; 20a, an outer mold opening; 21. an outer die sleeve; 22. axial briquetting; 101. a parallel segment; 102. an avoidance section; 103. a transition section; 111. a first surface of revolution; 211. a second surface of revolution; 201. positioning pins; 30. a flow divider.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below 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.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a flat wire wrapping mold which is suitable for wrapping a flat metal wire, in particular to a flat steel belt or a flat copper belt and the like, and the flat metal wire wrapping mold is not particularly limited.

Referring to fig. 1 to 5, in an embodiment of the present invention, the flat wire covering mold includes an inner mold 10 and an outer mold 20, the inner mold 10 is formed with an inner mold opening 10a, as shown in fig. 4, the inner mold opening 10a is disposed in a dumbbell shape; the outer mold 20 is disposed outside the inner mold 10, and the outer mold 20 is provided with an outer mold opening 20a at a position corresponding to the inner mold opening 10a, and as shown in fig. 5, the outer mold opening 20a has a rectangular outline.

In this embodiment, at least a portion of the inner mold 10 may be inserted into the outer mold 20, the inner mold opening 10a and the outer mold opening 20a are communicated through a fluid flow channel, and the inner mold opening 10a and the outer mold opening 20a may be coaxially disposed, that is, they may be disposed opposite to each other, so as to facilitate the glue flowing and make the product processing dimension reach the standard.

Referring mainly to fig. 1 and 3, in this embodiment, for convenience of positioning, to align the inner die orifice 10a with the outer die orifice 20a, one end of the inner die 10 opposite to the outer die 20 may be provided with a positioning notch 10b connected with other parts of the die, the outer die 20 may be provided with a positioning pin 201 connected with an outer die sleeve 21 of the die or other parts, and an axial pressing block 22 may be inserted between an outer end peripheral wall of the outer die 20 and the outer die sleeve 21 to fix the outer die 20 in the axial direction.

In the technical scheme of the utility model, the flat wire wrapping die comprises an inner die 10 and an outer die 20, wherein an inner die opening 10a is formed in the inner die 10, and the outline of the inner die opening 10a is arranged in a dumbbell shape; the outer die 20 is arranged on the outer side of the inner die 10, the outer die 20 is provided with an outer die opening 20a at a position corresponding to the inner die opening 10a, and the outline of the outer die opening 20a is rectangular. The inner die opening 10a is dumbbell-shaped in outline, so that the precision of the wire coating thickness is improved, the processing difficulty is reduced, and the core material is prevented from shape errors or processing peaks or burrs at corners when passing through the inner die opening, particularly the core material with a primary coating or plating layer, and the coating or plating layer is likely to be accumulated at the corners; in addition, the avoidance areas at the two ends and the space formed by the core materials can realize the reverse pressure between the extrusion die cavity and the core materials, and are more favorable for the core materials to move to bring out the extruded and melted coating layer materials to form the coating layer. Therefore, the flat wire coating die improves the uniformity of the coating layer thickness of the flat wire, achieves better coating effect, and further improves the qualification rate of finished products

Referring to fig. 4, in order to improve the processing precision of the flat wire rod wrapping mold and further improve the wire rod wrapping effect, in an embodiment, the profile of the inner mold opening 10a includes a first profile section and a second profile section that are symmetrically arranged, and each of the first profile section and the second profile section includes a parallel section 101 located in the middle thereof, two avoidance sections 102 respectively connected to two ends of the parallel section 101, and two transition sections 103 respectively connected to the two avoidance sections 102; the avoiding section 102 extends along a direction away from a symmetry line of the first profile section and the second profile section to form a dumbbell-shaped inner die opening 10 a.

In this embodiment, the inner die opening 10a is provided with the upper and lower positioning parallel sections 101 whose middle portions are shortened, which is beneficial to improving the thickness precision of the passing wire and reducing the processing difficulty. Furthermore, the evasion sections 102 with the splayed corners at the two ends of the inner die opening 10a are beneficial to avoiding the shape error of the corners or the processing peak or burr when the core material passes through, and particularly, the core material with the primary coating or plating layer is likely to have the accumulation of the coating or plating layer at the corners. Meanwhile, the avoidance areas at the two ends and the space formed between the core materials can realize the pressure in the opposite direction of the extrusion die cavity and the core materials, and the core materials can be more favorably moved to take out the extruded and melted coating layer materials to form the coating layer.

To further improve the machining accuracy, in one embodiment, referring to fig. 4, the length of the parallel section 101 is adapted to be greater than one-third and less than two-thirds of the width of the flat wire.

Based on the above embodiment, the maximum distance between the avoidance segment 102 of the first profile segment and the opposite avoidance segment 102 of the second profile segment is 0.1-0.3 mm larger than the distance between the parallel segment 101 of the first profile segment and the parallel segment 101 of the second profile segment. Therefore, the size precision of the rubber coating layer of the flat wire coating die can be further improved.

Furthermore, the transition section 103 may be arc-shaped, and the radius of the rounded corner may be 0.3-0.5 mm.

In this embodiment, four corners of the outline of the outer mold opening 20a may be circular arc, and the radius of the rounded corner may be 0.3-0.5 mm.

The experimental test shows that when the shapes and sizes of the inner die opening 10a and the outer die opening 20a are limited within the above range, the four-corner wrapping effect of the flat wire can reach a better state, and the yield of products can be greatly improved.

Further, in some embodiments, as shown in fig. 3, the outer peripheral wall of the inner die 10 forms a first surface of revolution 111, the first surface of revolution 111 being conical.

Referring to fig. 3, in the present embodiment, the outer peripheral wall of the outer die 20 forms a second surface of revolution 211, and the second surface of revolution 211 is cylindrical.

It can be understood that the two-dimensional positioning accuracy complexity of the thickness and the width of the flat wire can be simplified into the one-dimensional accuracy adjustability of the angle by the circular positioning of the outline revolution surface of the die and the adjustment of the angle, and the installation difficulty can be simplified by the proper guide gauge or positioning gauge, so that the installation and positioning accuracy of the inner die 10 and the outer die 20 can be improved, and the processing accuracy can be further improved.

In order to facilitate the installation of the inner mold 10 and the outer mold 20, in some embodiments, the flat wire covering mold may further include two body fixing blocks (not shown) disposed at both sides of the inner mold 10 and the outer mold 20 for fixing to an extruder head of an extrusion molding machine.

Further, in order to realize the shunting, so as to improve the encapsulation efficiency and effect, in an embodiment, the flat wire rod encapsulation mold further includes a shunt 30, the shunt 30 is disposed between the two machine body fixing blocks and is disposed around one end of the inner mold 10, and the shunt 30 is communicated with the inner mold 10.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a flat wire rod coating die which characterized in that, flat wire rod coating die includes:

2. The flat wire rod covering die of claim 1, wherein the profile of the inner die opening comprises a first profile section and a second profile section which are symmetrically arranged, and the first profile section and the second profile section each comprise a parallel section positioned in the middle of the first profile section, two avoidance sections respectively connected with two ends of the parallel section, and two transition sections respectively connected with the two avoidance sections;

3. The flat wire covering die of claim 2, wherein the length of the parallel segments is adapted to be greater than one-third and less than two-thirds of the width of the flat wire.

4. The flat wire covering die according to claim 3, wherein a maximum distance between the relief section of the first profile section and the opposing relief section of the second profile section is 0.1 to 0.3mm larger than a distance between the parallel section of the first profile section and the parallel section of the second profile section.

5. The flat wire rod covering mold according to claim 4, wherein the transition section is arc-shaped and has a radius of 0.3 to 0.5 mm.

6. The flat wire rod covering mold according to claim 1, wherein four corners of the outline of the outer die opening are rounded, and the radius of the rounded corner is 0.3 to 0.5 mm.

7. The flat wire covering die of claim 1, wherein the outer peripheral wall of said inner die forms a first surface of revolution, said first surface of revolution being conical.

8. The flat wire covering die of claim 7, wherein the outer peripheral wall of the outer die forms a second surface of revolution, the second surface of revolution being cylindrical.

9. The flat wire covering die of claim 8, further comprising two body fixing blocks disposed on both sides of the inner die and the outer die for fixing to an extruder head of an extrusion molding machine.

10. The flat wire coating die of claim 9, further comprising a diverter disposed between said two fuselage mounting blocks and around one end of said inner die, said diverter in communication with said inner die.