Wire in-mold bending positioning structure

Abstract

The utility model discloses an in-mold bending and positioning structure for a wire. The in-mold bending and positioning structure comprises a lower mold and an upper mold, the lower die comprises a lower die base, a lower die plate and an ejection mechanism; the upper die comprises an upper die base, an upper die plate and a sprue gate; the upper surface of the lower die plate is concavely provided with a wire bending groove, the wire bending groove is communicated with the other side of the lower concave cavity, the lower die plate is provided with an insert capable of elastically floating up and down, the insert is controlled by the upper die to float up and down, the top of the insert is concavely provided with a positioning groove used for positioning a core wire, and the insert is located beside the wire bending groove. The wire bending groove and the insert are arranged on the lower mold, the movable pressing block is arranged on the upper mold in a matched mode, in the mold closing process of the upper mold and the lower mold, the movable pressing block and the insert are matched to conduct bending positioning on a core wire of an electric wire, after injection molding is completed, it can be guaranteed that the core wire is accurately and centrally arranged in a plastic body, and the product quality is effectively improved; and convenience is brought to production operation.

Description

Technical Field

[0001] The utility model relates to the technology of mold field, in particular to a bending and positioning structure in a wire mold. Background Art

[0002] Electric wires are wires that transmit electric current and are used to connect various electrical devices. The main structure of electric wires usually includes an outer sheath and multiple core wires. The multiple core wires are wrapped in the outer sheath, and the ends of the multiple core wires extend outward from the ends of the outer sheath. In order to better fix the ends of the outer sheath with the core wires and prevent external moisture from entering the outer sheath, it is necessary to inject and wrap a plastic body between the ends of the outer sheath and the core wires.

[0003] At present, the molding of plastic bodies requires placing wires in an injection mold, and the main structure of this injection mold includes a lower mold and an upper mold; the lower mold includes a lower mold base, a lower mold plate and an ejection mechanism; the lower mold plate is arranged on the lower mold base, and the upper surface of the lower mold plate is concavely provided with a lower concave cavity and a wire inlet groove, and the wire inlet groove is connected to one side of the lower concave cavity; the ejection mechanism can be movably arranged on the lower mold base and extend into the lower concave cavity; the upper mold can be movably arranged directly above the lower mold, and the upper mold includes an upper mold base, an upper mold plate and a pouring port; the upper mold plate is arranged at the bottom of the upper mold base, the upper mold plate covers the wire inlet groove, and the lower surface of the upper mold plate is concavely provided with an upper concave cavity, and the upper concave cavity and the lower concave cavity surround a cavity, and the pouring port is arranged on the upper mold base and is connected to the cavity; when working, molten plastic is injected into the cavity through the pouring port, and the plastic body can be obtained when the molten plastic is cooled and solidified.

[0004] However, in some specific applications, the plastic body needs to be made into a curved structure, and the wires also need to be bent. The injection mold in the prior art cannot bend and position the wires, resulting in the core wire of the wire not being accurately centered in the plastic body, and the product quality cannot be guaranteed. Therefore, it is necessary to improve the current injection mold. Utility Model Content

[0005] In view of this, the present invention aims to solve the defects of the prior art, and its main purpose is to provide a wire in-mold bending and positioning structure, which can effectively solve the problem that the existing injection mold cannot bend and position the wire.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A wire mold inner bending positioning structure, comprising a lower mold and an upper mold; the lower mold comprises a lower mold base, a lower mold plate and an ejection mechanism; the lower mold plate is arranged on the lower mold base, and the upper surface of the lower mold plate is concavely provided with a lower concave cavity and a wire inlet groove, and the wire inlet groove is connected with one side of the lower concave cavity; the ejection mechanism can be movably arranged on the lower mold base and extend into the lower concave cavity; the upper mold can be movably arranged just above the lower mold, and the upper mold comprises an upper mold base, an upper mold plate and a pouring port; the upper mold plate is arranged at the bottom of the upper mold base, and the upper mold plate covers the wire inlet groove, and the upper mold plate An upper concave cavity is recessed on the lower surface, and the upper concave cavity and the lower concave cavity form a mold cavity. The pouring port is arranged on the upper mold base and is connected with the mold cavity. A bending wire groove is recessed on the upper surface of the lower mold plate, and the bending wire groove is connected with the other side of the lower concave cavity. An insert that can float up and down elastically is arranged on the lower mold plate. The insert floats up and down under the control of the upper mold. A positioning groove for positioning the core wire is recessed on the top of the insert. The insert is located on the side of the bending wire groove. In addition, a movable pressure block for pressing the core wire is arranged in the upper mold plate, and the movable pressure block is located above the bending wire groove.

[0008] As a preferred solution, a receiving hole is provided on the lower template, and the insert is arranged in the receiving hole so as to float up and down elastically by a spring, and the spring forces the insert to extend upward out of the receiving hole.

[0009] As a preferred solution, the accommodating hole passes through the upper and lower surfaces of the lower template, and a positioning hole is recessed on the upper surface of the lower mold base. The positioning hole is connected to the accommodating hole in a vertical direction, and the lower end of the spring is positioned in the positioning hole.

[0010] As a preferred solution, the upper and lower surfaces of the upper template are penetrated with mounting holes, which extend obliquely. The movable pressure block is arranged in the mounting hole and moves back and forth along the mounting hole. The upper template can be movably arranged up and down at the bottom of the upper mold base relative to the upper mold base. A pressure block is fixed to the lower surface of the upper mold base, which cooperates with the movable pressure block and prompts the movable pressure block to move downward along the mounting hole.

[0011] As a preferred solution, the pressing block is fixed to the upper die base by bolts and protrudes downward from the lower surface of the upper die base.

[0012] As a preferred solution, an upper ejector pin is fixed on the movable pressing block, and the upper ejector pin extends into or out of the upper concave cavity as the movable pressing block moves, so as to better perform multi-section bending on the core wire.

[0013] As a preferred solution, the ejection mechanism includes a movable plate, a lower ejector pin and a lower ejector rod. The movable plate can be movably arranged in the lower mold base up and down. The lower ejector pin is fixed on the movable plate and extends into or out of the lower concave cavity as the movable plate moves up and down. The lower ejector rod is fixed on the movable plate and extends into or out of the wire feed groove as the movable plate moves up and down, so as to better press and position the outer sheath of the wire.

[0014] As a preferred solution, a fixed pressing block is provided on the upper template, and the fixed pressing block is located above the wire inlet groove so as to better press and position the outer sheath of the wire.

[0015] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0016] By providing a wire bending groove and an insert on the lower mold and providing a movable pressure block on the upper mold, during the closing process of the upper and lower molds, the movable pressure block and the insert can cooperate to bend and position the core wire of the wire. After the injection molding is completed, the core wire can be accurately centered in the plastic body, which effectively improves product quality and brings convenience to production operations.

[0017] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional view of a preferred embodiment of the utility model;

[0020] Figure 3 It is a partial assembly diagram of a preferred embodiment of the utility model;

[0021] Figure 4 yes Figure 3 A three-dimensional schematic diagram of another state;

[0022] Figure 5 It is an enlarged schematic diagram of the lower template in the preferred embodiment of the utility model;

[0023] Figure 6 It is an enlarged schematic diagram of the upper template in the preferred embodiment of the utility model.

[0024] Description of the accompanying drawings:

[0025] 10. Lower die 11. Lower die seat

[0026] 12. Lower template 13. Ejector mechanism

[0027] 131, movable plate 132, lower ejector pin

[0028] 133, lower ejector 14, insert

[0029] 141, positioning groove 15, spring

[0030] 101, lower concave cavity 102, wire inlet slot

[0031] 103, bending groove 104, receiving hole

[0032] 105, positioning hole 106, lower boss

[0033] 20. Upper die 21. Upper die seat

[0034] 22. Upper template 23. Pouring port

[0035] 24. Movable pressure block 25. Pressure block

[0036] 26. Bolt 27. Ejector pin

[0037] 28. Fixed pressing block 201, upper concave cavity

[0038] 202, mounting hole 203, upper boss

[0039] 30. Wire 31. Core wire

[0040] 32. Outer cover 33. Plastic body. DETAILED DESCRIPTION

[0041] Please refer to Figures 1 to 6 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a lower mold 10 and an upper mold 20.

[0042] The lower die 10 includes a lower die base 11, a lower die plate 12 and an ejection mechanism 13; the lower die plate 12 is arranged on the lower die base 11, and a lower concave cavity 101 and a wire inlet groove 102 are recessed on the upper surface of the lower die plate 12, and the wire inlet groove 102 is connected to one side of the lower concave cavity 101; the ejection mechanism 13 can be movably arranged on the lower die base 11 and extend into the lower concave cavity 101; and, a wire bending groove 103 is recessed on the upper surface of the lower die plate 12, and the wire bending groove 103 is connected to the other side of the lower concave cavity 101, and an insert 14 that can float up and down elastically is arranged on the lower die plate 12, and the insert 14 floats up and down controlled by the upper die 20, and a positioning groove 141 for positioning the core wire 31 is recessed on the top of the insert 14, and the insert 14 is located on the side of the wire bending groove 103.

[0043] In this embodiment, the lower mold plate 12 is provided with a receiving hole 104, and the insert 14 is elastically arranged in the receiving hole 104 by means of a spring 15 so as to float up and down, and the spring 15 causes the insert 14 to extend upward out of the receiving hole 104, and the structure is simple. In addition, the receiving hole 104 passes through the upper and lower surfaces of the lower mold plate 12, and the upper surface of the lower mold base 11 is concavely provided with a positioning hole 105, and the positioning hole 105 is directly connected to the receiving hole 104 in the upper and lower directions, and the lower end of the spring 15 is positioned in the positioning hole 105, and the structure is simple and easy to disassemble and assemble. The ejection mechanism 13 includes a movable plate 131, a lower ejector pin 132 and a lower ejector rod 133. The movable plate 131 can be movably arranged in the lower mold base 11. The lower ejector pin 132 is fixed on the movable plate 131 and extends into or out of the lower concave cavity 101 as the movable plate 131 moves up and down. The lower ejector rod 133 is fixed on the movable plate 131 and extends into or out of the wire inlet groove 102 as the movable plate 131 moves up and down, so as to better press and position the outer sheath 32 of the wire 30. In addition, the lower concave cavity 101 is arranged in two parallel intervals, and correspondingly, the wire inlet groove 102, the bending groove 103 and the insert 14 are also arranged in two parallel intervals, so as to simultaneously perform injection molding on two wires 30, and the bottom surface of the lower concave cavity 101 is convexly provided with a plurality of lower protrusions 106 arranged in intervals, so as to position the end of the outer sheath 32.

[0044] The upper mold 20 can be movably arranged up and down just above the lower mold 10, and the upper mold 20 includes an upper mold base 21, an upper mold plate 22 and a pouring port 23; the upper mold plate 22 is arranged at the bottom of the upper mold base 21, the upper mold plate 22 covers the wire inlet groove 102, and an upper concave cavity 201 is concavely provided on the lower surface of the upper mold plate 22, and the upper concave cavity 201 and the lower concave cavity 101 form a mold cavity, and the pouring port 23 is arranged on the upper mold base 21 and communicated with the mold cavity; a movable pressing block 24 for pressing the core wire 31 is arranged in the upper mold plate 22, and the movable pressing block 24 is located above the bending groove 103.

[0045] In this embodiment, the upper and lower surfaces of the upper template 22 are penetrated with mounting holes 202, and the mounting holes 202 extend obliquely. The movable pressing block 24 is arranged in the mounting hole 202 and moves back and forth along the mounting hole 202. The upper template 22 is arranged at the bottom of the upper mold base 21 so as to be movable up and down relative to the upper mold base 21. A pressing block 25 is fixed on the lower surface of the upper mold base 21. The pressing block 25 cooperates with the movable pressing block 24 and prompts the movable pressing block 24 to move downward along the mounting hole 202. The structure is simple, so as to better press and bend the core wire 31. In addition, the pressing block 25 is fixed to the upper mold base 21 by bolts 26 and protrudes downward from the lower surface of the upper mold base 21. The structure is simple and easy to disassemble and assemble. In addition, an upper ejector pin 27 is fixed on the movable pressing block 24. The upper ejector pin 27 extends into or out of the upper concave cavity 201 as the movable pressing block 24 moves, so as to better perform multi-stage bending on the core wire 31. Furthermore, a fixed pressing block 28 is provided on the upper mold plate 22, and the fixed pressing block 28 is located above the wire inlet groove 102, so as to better press and position the outer jacket 32 ​​of the wire 30. In addition, the upper concave cavity 201 is provided with two spaced-apart arrangements side by side, and correspondingly, the movable pressing block 24 is also provided with two spaced-apart arrangements side by side, so as to simultaneously perform injection molding on two wires 30, and the bottom surface of the upper concave cavity 201 is provided with a plurality of spaced-apart upper protrusions 203, so as to position the end of the outer jacket 32.

[0046] The working principle of this embodiment is described in detail as follows:

[0047] First, the upper mold 20 is moved upward to separate from the lower mold 10 to open the mold. At this time, the insert 14 moves upward under the action of the spring 15 to protrude the upper surface of the lower mold plate 12. The upper mold plate 22 is suspended below the upper mold base 21. Next, the wire 30 is placed on the lower mold 10. The part that does not need to be injected is located in the wire inlet groove 103. The end of the outer sheath 32 is suspended in the lower concave cavity 101. The core wire 31 is located above the bending groove 103. The end of the core wire 31 is stuck in the positioning groove 101. 41, then, the upper mold 20 is moved downward to close the mold with the lower mold 10. During the process of closing the mold, the movable pressure block 24 presses the core wire 31 to achieve bending. After the closing of the mold, the core wire 31 is bent. Then, molten plastic is injected into the mold cavity through the pouring port 23. After the molten plastic is cooled and solidified, a plastic body 33 is formed. The plastic body 33 covers the end of the outer shell 32 and the core wire 31. Finally, the upper mold 20 and the lower mold 10 are opened and the product is taken out.

[0048] The design focus of the utility model is that a bending groove and an insert are provided on the lower mold, and a movable pressure block is provided on the upper mold. During the closing process of the upper mold and the lower mold, the movable pressure block cooperates with the insert to bend and position the core wire of the wire. After the injection molding is completed, the core wire can be accurately centered in the plastic body, which effectively improves the product quality and brings convenience to the production operation.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A bending and positioning structure in a wire mold, comprising a lower mold and an upper mold; the lower mold comprises a lower mold base, a lower mold plate and an ejection mechanism; the lower mold plate is arranged on the lower mold base, and a lower concave cavity and a wire inlet groove are concavely arranged on the upper surface of the lower mold plate, and the wire inlet groove is communicated with one side of the lower concave cavity; the ejection mechanism can be movably arranged on the lower mold base and extend into the lower concave cavity; the upper mold can be movably arranged just above the lower mold, and the upper mold comprises an upper mold base, an upper mold plate and a pouring port; the upper mold plate is arranged at the bottom of the upper mold base, the upper mold plate covers the wire inlet groove, and an upper concave cavity is concavely arranged on the lower surface of the upper mold plate, and the upper concave cavity and the lower concave cavity surround a mold cavity, and the pouring port is arranged on the upper mold base and communicated with the mold cavity; characterized in that: The upper surface of the lower template is recessed with a wire bending groove, which is connected to the other side of the lower concave cavity, and the lower template is provided with an insert that can elastically float up and down, and the insert is controlled by the upper mold to float up and down, and the top of the insert is recessed with a positioning groove for positioning the core wire, and the insert is located on the side of the wire bending groove, and a movable pressure block for pressing the core wire is provided in the upper template, and the movable pressure block is located above the wire bending groove.

2. The wire mold inner bending positioning structure according to claim 1, characterized in that: The lower template is provided with an accommodating hole, and the insert is arranged in the accommodating hole in an elastic manner of floating up and down by a spring, and the spring forces the insert to extend upward out of the accommodating hole.

3. The wire in-mold bending and positioning structure according to claim 2, characterized in that: The accommodating hole passes through the upper and lower surfaces of the lower template. The upper surface of the lower mold base is concavely provided with a positioning hole. The positioning hole is directly connected to the accommodating hole in the upper and lower directions. The lower end of the spring is positioned in the positioning hole.

4. The wire mold inner bending positioning structure according to claim 1, characterized in that: The upper and lower surfaces of the upper template are penetrated by mounting holes, which extend obliquely. The movable pressure block is arranged in the mounting hole and moves back and forth along the mounting hole. The upper template can be movably arranged at the bottom of the upper mold base relative to the upper mold base, and a pressure block is fixed on the lower surface of the upper mold base. The pressure block cooperates with the movable pressure block and prompts the movable pressure block to move downward along the mounting hole.

5. The wire in-mold bending and positioning structure according to claim 4, characterized in that: The pressing block is fixed on the upper die seat by bolts and protrudes downward from the lower surface of the upper die seat.

6. The wire in-mold bending and positioning structure according to claim 1, characterized in that: An upper ejector pin is fixed on the movable pressing block, and the upper ejector pin extends into or out of the upper concave cavity as the movable pressing block moves.

7. The wire in-mold bending and positioning structure according to claim 1, characterized in that: The ejection mechanism includes a movable plate, a lower ejector pin and a lower ejector rod. The movable plate can be movably arranged in the lower mold base. The lower ejector pin is fixed on the movable plate and extends into or out of the lower concave cavity as the movable plate moves up and down. The lower ejector rod is fixed on the movable plate and extends into or out of the wire feed groove as the movable plate moves up and down.

8. The wire in-mold bending and positioning structure according to claim 7, characterized in that: The upper template is provided with a fixed pressing block, which is located above the wire inlet groove.

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