Method for manufacturing a metal-coated connecting cable

Abstract

The application discloses a preparation method of a hardware rubber-coated connecting wire and a mold thereof, and adopts a special preparation mold to position the hardware of the connecting wire and to perform twice injection molding on the plastic shell. When the plastic shell is injected, the plastic shell is split into multiple sections, a primary molding shell of the plastic shell is first injected in a first injection area of the mold, and the exposed part of the hardware of the connecting wire can be fixed on the mold and cannot be deviated. When the primary injection is completed, secondary injection of the plastic shell is performed in a second injection area of the mold, a secondary molding shell connected with the primary molding shell is formed outside the hardware of the connecting wire, and the primary molding shell can be fixed when the mold is closed during the secondary injection. The application can prevent uncontrollable deformation or displacement of the hardware of the connecting wire during injection of the shell, avoids exposure of the hardware of the connecting wire on the surface of the plastic shell, and solves the problem of function failure of the plastic shell.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware rubber-coated products, and more particularly to a preparation method of a hardware rubber-coated connecting wire and a mold thereof. Background Art

[0002] Existing hardware-coated rubber cables (such as car lock cables) can be made from conductive hardware and a plastic casing, with the plastic casing acting as an insulator. The manufacturing process for these cables requires injection molding the plastic casing onto the exterior of the hardware. However, when these long rubber-coated hardware cables are used, the following problems arise during the manufacturing process: the long hardware lacks support points in the mold. During injection molding of the plastic casing, the impact force generated by the plastic material entering the mold cavity can cause uncontrolled deformation or displacement of the hardware, exposing the hardware to the surface of the plastic casing and rendering the plastic casing ineffective. Summary of the Invention

[0003] The object of the present invention is to overcome the above-mentioned defects in the prior art and provide a method for preparing a hardware-coated plastic connecting cable and a mold thereof, which can prevent the uncontrollable deformation or displacement of the connecting cable hardware during the injection molding of the shell, and avoid the problem that the connecting cable hardware is exposed on the surface of the plastic shell and causes the function of the plastic shell to fail.

[0004] To achieve the above-mentioned object, a first aspect of the present invention provides a mold for preparing a hardware-coated connecting wire, comprising a front mold mechanism and a rear mold mechanism capable of being molded with the front mold mechanism, wherein the front mold mechanism comprises a front mold base plate, a front mold middle plate, a front mold plate, a front mold core and a glue feed nozzle, wherein the front mold middle plate is installed between the front mold base plate and the front mold plate, the front mold core is installed in the front mold slot of the front mold plate, a first front mold injection area and a second front mold injection area located on one side of the first front mold injection area are provided on the surface of the front mold core, at least one row of front mold primary molding cavities arranged at intervals are provided in the first front mold injection area, and at least one row of front mold secondary molding cavities are provided in the second front mold injection area, the glue feed nozzle is installed in the middle of the front mold base plate, and the glue feed nozzle is connected to the front mold primary molding cavity and the front mold secondary molding cavity through the front mold runner;

[0005] The rear mold mechanism includes a rear mold bottom plate, a square iron, a rear mold plate, a rear mold core, an ejector plate and an ejector, the square iron and the ejector plate are both located between the rear mold bottom plate and the rear mold plate, the square iron is located on both sides of the ejector plate, the rear mold core is installed in the rear mold slot installed in the rear mold plate, the surface of the rear mold core is provided with a first rear mold injection area and a second rear mold injection area located on one side of the first rear mold injection area, the first rear mold injection area is provided with at least one row of rear mold primary molding cavities arranged at intervals and at least one group of first hardware fixtures, the first hardware fixture is located in the arrangement of the rear mold primary molding cavities The second rear mold injection area is provided with at least one row of rear mold secondary molding cavities and at least one group of second hardware fixtures, and the second hardware fixtures are located on the extension path of the rear mold secondary molding cavity, and the position of the rear mold secondary molding cavity is located corresponding to the position of the front mold secondary molding cavity. A plurality of ejector pins are provided and are respectively installed on ejector pin plates, and the ejection ends of the ejector pins are respectively located in the rear mold primary molding cavity and the rear mold secondary molding cavity.

[0006] Preferably, a first hardware end positioning hole is provided at one end of the first rear mold injection area, a first hardware positioning insert is provided at the other end of the first rear mold injection area, and a second hardware end positioning hole is provided on the first hardware positioning insert.

[0007] Preferably, one end of the second rear mold injection zone is provided with a left end forming insert, a right end forming insert and a middle end forming insert located in the slot of the rear mold core, the middle end forming insert is located between the left end forming insert and the right end forming insert, the left end forming insert, the right end forming insert and the middle end forming insert are combined to form a connecting line end forming cavity, the top of the middle end forming insert is provided with a third hardware end positioning hole, the other end of the first rear mold injection zone is provided with a second hardware positioning insert, and the second hardware positioning insert is provided with a fourth hardware end positioning hole.

[0008] Preferably, a hardware limiting insert is provided in the first rear mold injection area.

[0009] Preferably, a hardware positioning block is provided in the first front mold injection area, and a hardware positioning groove is provided in the first rear mold injection area. When the front mold mechanism and the rear mold mechanism are closed, the hardware positioning block is placed in the hardware positioning groove.

[0010] Preferably, the first hardware fixture and the second hardware fixture both include a fixture body, one end portion of the fixture body is provided with a middle groove located in the middle position thereof and a first clip and a second clip located in the middle groove, and the first clip and the second clip are symmetrically arranged.

[0011] A second aspect of the present invention provides a method for preparing a metal-coated rubber-coated connecting wire, wherein the metal-coated rubber-coated connecting wire comprises a long strip of connecting wire hardware and a plastic shell, wherein the plastic shell is injection molded on the outside of the connecting wire hardware, and the plastic shell is formed by alternatingly connecting a primary molded shell and a secondary molded shell. The metal-coated rubber-coated connecting wire is prepared using the metal-coated rubber-coated connecting wire preparation mold described in the above technical solution. The preparation method comprises the following steps:

[0012] (1) Place the connecting wire hardware in the first rear mold injection area on the rear mold core surface of the rear mold mechanism, insert one end of the connecting wire hardware into the first hardware end positioning hole, and insert the other end of the connecting wire hardware into the second hardware end positioning hole on the first hardware positioning insert, and clamp the connecting wire hardware by the first hardware fixture, so that the connecting wire hardware can pass through each rear mold molding cavity at one time;

[0013] (2) closing the front mold mechanism and the rear mold mechanism, and injecting the plastic material into each front mold primary molding cavity and each rear mold primary molding cavity, thereby forming a spaced-apart primary molding shell outside the connecting wire hardware;

[0014] (3) The front mold mechanism and the rear mold mechanism are opened, and the connecting wire hardware of the once-molded shell is transferred to the second rear mold injection area on the surface of the rear mold core, so that one end of the connecting wire hardware is inserted into the third hardware end positioning hole of the middle end molding insert, and the other end of the connecting wire hardware is inserted into the fourth hardware end positioning hole of the second hardware positioning insert, and the once-molded shell outside the connecting wire hardware is clamped by the second hardware clamp, so that the connecting wire hardware can pass through each rear mold secondary molding cavity;

[0015] (4) The front mold mechanism and the rear mold mechanism are again closed, and the plastic material is injected into each front mold secondary molding cavity and each rear mold secondary molding cavity, thereby forming a secondary molding shell connected to each primary molding shell on the outside of the connecting wire hardware;

[0016] (5) Open the front mold mechanism and the rear mold mechanism, and take out the metal-coated connecting wires that have been completed by injection molding.

[0017] Preferably, when the connecting wire hardware is provided with a first bent portion protruding toward the outside of the rear mold core, the first bent portion of the connecting wire hardware is placed on the periphery of the hardware limiting insert in the first rear mold injection area for limiting.

[0018] Preferably, when the connecting wire hardware is provided with a second bent portion which is concave toward the back side of the rear mold core, the second bent portion of the connecting wire hardware is placed in the hardware positioning pressing groove of the first rear mold injection molding area, and when the front mold mechanism and the rear mold mechanism are closed, the second bent portion of the connecting wire hardware is pressed by the hardware positioning pressing block of the first front mold injection molding area.

[0019] Preferably, an undercut is provided at the connection between the primary molded shell and the secondary molded shell for increasing the connection strength between the two.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The structural design of the present invention adopts a special preparation mold to position the connecting wire hardware and perform two injection molding on the plastic shell. When the plastic shell is injected, the plastic shell is split into multiple sections. The primary molded shell of the plastic shell is first injection molded in the first injection area of ​​the mold, and the exposed part of the connecting wire hardware can be fixed on the mold without unnecessary deviation. After the primary injection molding is completed, the secondary injection molding of the plastic shell is performed in the second injection area of ​​the mold, and a secondary molded shell connected to the primary molded shell is injection molded outside the connecting wire hardware. During the secondary injection molding process, the primary molded shell can play a fixing role when the mold is closed. The present invention can prevent the connecting wire hardware from uncontrollable deformation or displacement during the shell injection molding, and avoid the problem that the connecting wire hardware is exposed on the surface of the plastic shell, which makes the function of the plastic shell fail.

[0022] 2. The present invention provides an undercut at the connection between the primary molded shell and the secondary molded shell of the plastic shell, which can increase the connection strength between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the finished product structure of the hardware rubber-coated connecting wire provided by an embodiment of the present invention after secondary injection molding;

[0025] Figure 2 This is a schematic structural diagram of a hardware rubber-coated connecting wire provided by an embodiment of the present invention after one-time injection molding;

[0026] Figure 3 This is an enlarged view (cross-section) of the partial structure of the hardware rubber-coated connecting wire provided by an embodiment of the present invention;

[0027] Figure 4 This is a structural diagram of a mold for preparing a hardware-coated rubber-coated connecting wire provided by an embodiment of the present invention;

[0028] Figure 5 1 is a schematic structural diagram of a front mold mechanism provided by an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the front mold provided by an embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the structure of the rear mold mechanism provided by an embodiment of the present invention;

[0031] Figure 8 1 is a partial structural diagram of a rear mold mechanism provided by an embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the rear mold core provided by an embodiment of the present invention;

[0033] Figure 10 It is a structural diagram of a first hardware positioning insert or a second hardware positioning insert provided in an embodiment of the present invention;

[0034] Figure 11 is a structural diagram of a first hardware fixture or a second hardware fixture provided by an embodiment of the present invention;

[0035] Figure 12 It is an exploded view of the left end forming insert, the right end forming insert and the middle end forming insert provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Please refer to Figure 1 and Figure 3 The figure shows a hardware-coated connecting wire, which includes a long strip of connecting wire hardware 10 and a plastic shell 20. The plastic shell 20 is injection molded on the outside of the connecting wire hardware 10. The plastic shell 20 can be formed by alternatingly connecting a primary molded shell 201 and a secondary molded shell 202.

[0038] like Figure 2As shown, the connecting wire hardware 10 may be provided with a first bending portion 101 convexly arranged toward the outside and a second bending portion 102 concavely arranged downwardly.

[0039] like Figure 3 As shown, as a further improvement, the connection between the primary molded shell 201 and the secondary molded shell 202 can be further provided with an undercut 203 for increasing the connection strength between the two. The undercut 203 can be a dovetail connection undercut.

[0040] Please refer to Figure 4 An embodiment of the present invention provides a mold for preparing a hardware rubber-coated connecting wire, including a front mold mechanism 1 and a rear mold mechanism 2 that can be molded with the front mold mechanism 1. The following is a detailed description of the various components of this embodiment in conjunction with the accompanying drawings.

[0041] like Figure 5 and Figure 6 As shown, the front mold mechanism 1 may include a front mold base plate 11, a front mold middle plate 12, a front mold plate 13, a front mold core 14 and a glue feed nozzle 15. The front mold middle plate 12 is installed between the front mold base plate 11 and the front mold plate 13, and the front mold core 14 is installed in the front mold slot of the front mold plate 13. The surface of the front mold core 14 is provided with a first front mold injection area and a second front mold injection area located on one side of the first front mold injection area. At least one row of front mold primary molding cavities 16 (preferably two rows) arranged at intervals are provided in the first front mold injection area, and at least one row of front mold secondary molding cavities 17 (preferably two rows) are provided in the second front mold injection area. The glue feed nozzle 15 is installed in the middle of the front mold base plate 11, and the glue feed nozzle 15 is connected to the front mold primary molding cavity 16 and the front mold secondary molding cavity 17 through the front mold runner.

[0042] like Figure 6 As shown, a hardware positioning block 18 may also be provided in the first front mold injection area.

[0043] like Figures 7 to 9As shown, the rear mold mechanism 2 may include a rear mold bottom plate 21, a square iron 22, a rear mold plate 23, a rear mold core 24, an ejector plate 25 and an ejector 26. The square iron 22 and the ejector plate 25 are both located between the rear mold bottom plate 21 and the rear mold plate 23. The square iron 22 is located on both sides of the ejector plate 25. The rear mold core 24 is installed in the rear mold slot installed in the rear mold plate 23. The surface of the rear mold core 24 is provided with a first rear mold injection area and a second rear mold injection area located on one side of the first rear mold injection area. The first rear mold injection area is provided with at least one row of rear mold one-time molding cavities 27 (preferably two rows) arranged at intervals and at least one group of first hardware fixtures 28 (preferably two groups, two in each group). The first hardware fixture 28 is located at the rear mold one-time molding area. The second rear mold injection molding area is provided with at least one row of rear mold secondary molding cavities 29 (preferably two rows) and at least one set of second hardware fixtures 210 (preferably two sets, two in each set). The second hardware fixtures 210 are located along the extension path of the rear mold secondary molding cavities 29. The rear mold secondary molding cavities 29 are located corresponding to the positions of the front mold secondary molding cavities 17. A plurality of ejector pins 26 are provided and mounted on the ejector plate 25. The ejection ends of the ejector pins 26 are located in the rear mold primary molding cavities 27 and the rear mold secondary molding cavities 29, respectively. The ejector pins 26 serve to release the product from the mold after it is formed.

[0044] The front mold primary molding cavity 16 and the rear mold primary molding cavity 27 are used for injection molding of the primary molding shell 201 , and the front mold secondary molding cavity 17 and the rear mold secondary molding cavity 29 are used for injection molding of the secondary molding shell 202 .

[0045] like Figure 9 and Figure 10 As shown, a first hardware end positioning hole 211 is provided at one end of the first rear mold injection area, a first hardware end positioning insert 212 is provided at the other end of the first rear mold injection area, and a second hardware end positioning hole 213 is provided on the first hardware end positioning insert 212.

[0046] like Figure 10 and Figure 12As shown, one end of the second rear mold injection zone is provided with a left end forming insert 214, a right end forming insert 215 and a middle end forming insert 216 located in the slot of the rear mold core 24, and the middle end forming insert 216 is located between the left end forming insert 214 and the right end forming insert 215. The left end forming insert 214, the right end forming insert 215 and the middle end forming insert 216 are combined to form a connecting line end forming cavity, and the top of the middle end forming insert 216 is provided with a third hardware end positioning hole 217. The other end of the first rear mold injection zone is provided with a second hardware positioning insert 218, and the second hardware positioning insert 218 is provided with a fourth hardware end positioning hole 219.

[0047] like Figure 9 As shown, a hardware limiting insert 220 may also be provided in the first rear mold injection area.

[0048] like Figure 9 As shown, a hardware positioning groove 221 may be further provided in the first rear mold injection area. When the front mold mechanism 1 and the rear mold mechanism 2 are closed, the hardware positioning block 18 is placed in the hardware positioning groove 221 .

[0049] like Figure 11 As shown, the first hardware fixture 28 and the second hardware fixture 210 can both include a fixture body 281, and one end of the fixture body 281 is provided with a middle groove 282 located in the middle position thereof and a first clip 283 and a second clip 284 located in the middle groove, and the first clip 283 and the second clip 284 are symmetrically arranged.

[0050] The preparation method of the hardware rubber-coated connecting wire of this embodiment comprises the following steps:

[0051] (1) Place the connecting wire hardware 10 in the first rear mold injection area on the surface of the rear mold core 24 of the rear mold mechanism 2, insert one end of the connecting wire hardware 10 into the first hardware end positioning hole 211, and insert the other end of the connecting wire hardware 10 into the second hardware end positioning hole 213 on the first hardware positioning insert 212, and clamp the connecting wire hardware 10 by the first hardware clamp 28, so that the connecting wire hardware 10 can pass through each rear mold primary molding cavity 27;

[0052] (2) The front mold mechanism 1 and the rear mold mechanism 2 are closed, and plastic material is injected into each front mold primary molding cavity 16 and each rear mold primary molding cavity 27, thereby forming spaced-apart primary molding shells 201 outside the connecting wire hardware 10;

[0053] (3) The front mold mechanism 1 and the rear mold mechanism 2 are opened, and the connecting wire hardware 10 with the once-molded shell 201 is transferred to the second rear mold injection area on the surface of the rear mold core 24, so that one end of the connecting wire hardware 10 is inserted into the third hardware end positioning hole 217 of the middle end molding insert 216, and the other end of the connecting wire hardware 10 is inserted into the fourth hardware end positioning hole 219 of the second hardware positioning insert 218, and the once-molded shell 201 outside the connecting wire hardware 10 is clamped by the second hardware fixture 210, so that the connecting wire hardware 10 can pass through each rear mold secondary molding cavity 29;

[0054] (4) The front mold mechanism 1 and the rear mold mechanism 2 are again closed, and the plastic material is injected into each front mold secondary molding cavity 17 and each rear mold secondary molding cavity 29, thereby forming a secondary molding shell 202 connected to each primary molding shell 201 on the outside of the connecting wire hardware 10;

[0055] (5) Open the front mold mechanism 1 and the rear mold mechanism 2, and take out the metal-coated connecting wires that have been completed by injection molding.

[0056] When the connecting wire hardware 10 is provided with a first bent portion protruding toward the outside of the rear mold core 24 , the first bent portion of the connecting wire hardware 10 is placed on the periphery of the hardware limiting insert 220 in the first rear mold injection area for limiting.

[0057] When the connecting wire hardware 10 is provided with a second bent portion that is concave toward the back surface of the rear mold core 24, the second bent portion of the connecting wire hardware is placed in the hardware positioning pressing groove 221 of the first rear mold injection area, and when the front mold mechanism 1 and the rear mold mechanism 2 are closed, the second bent portion of the connecting wire hardware 10 is pressed by the hardware positioning pressing block 18 of the first front mold injection area.

[0058] To sum up, the structural design of the present invention adopts a special preparation mold to position the connecting wire hardware and perform two injection molding on the plastic shell. When the plastic shell is injected, the plastic shell is split into multiple sections, and the primary molded shell of the plastic shell is first injection molded in the first injection area of ​​the mold, and the exposed part of the connecting wire hardware can be fixed on the mold without unnecessary deviation. After the primary injection molding is completed, the secondary injection molding of the plastic shell is performed in the second injection area of ​​the mold, and a secondary molded shell connected to the primary molded shell is injection molded on the outside of the connecting wire hardware. During the secondary injection molding process, the primary molded shell can play a fixing role when the mold is closed. The present invention can prevent the connecting wire hardware from uncontrollable deformation or displacement during the shell injection molding, and avoid the problem that the connecting wire hardware is exposed on the surface of the plastic shell, which makes the function of the plastic shell fail.

[0059] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A method for preparing a hardware-coated connecting wire, characterized in that: The hardware rubber-coated connecting wire includes a long strip of connecting wire hardware and a plastic shell. The plastic shell is injection molded on the outside of the connecting wire hardware. The plastic shell is formed by alternately connecting a primary molded shell and a secondary molded shell. The hardware rubber-coated connecting wire is prepared using a hardware rubber-coated connecting wire preparation mold. The hardware rubber-coated connecting wire preparation mold includes a front mold mechanism and a rear mold mechanism that can be molded with the front mold mechanism. The front mold mechanism includes a front mold bottom plate, a front mold middle plate, a front mold plate, a front mold core and a glue inlet nozzle. The front The mold center plate is installed between the front mold bottom plate and the front mold plate, the front mold core is installed in the front mold slot of the front mold plate, the surface of the front mold core is provided with a first front mold injection area and a second front mold injection area located on one side of the first front mold injection area, the first front mold injection area is provided with at least one row of front mold primary molding cavities arranged at intervals, the second front mold injection area is provided with at least one row of front mold secondary molding cavities, the glue feed nozzle is installed in the middle of the front mold bottom plate, and the glue feed nozzle is connected to the front mold primary molding cavity and the front mold secondary molding cavity through the front mold runner; The rear mold mechanism includes a rear mold bottom plate, a square iron, a rear mold plate, a rear mold core, an ejector plate and an ejector, the square iron and the ejector plate are both located between the rear mold bottom plate and the rear mold plate, the square iron is located on both sides of the ejector plate, the rear mold core is installed in the rear mold slot of the rear mold plate, the surface of the rear mold core is provided with a first rear mold injection area and a second rear mold injection area located on one side of the first rear mold injection area, the first rear mold injection area is provided with at least one row of rear mold primary molding cavities arranged at intervals and at least one group of first hardware fixtures, the first hardware fixture is located in the arrangement path of the rear mold primary molding cavities The second rear mold injection area is provided with at least one row of rear mold secondary molding cavities and at least one set of second hardware fixtures, the second hardware fixtures are located on the extension path of the rear mold secondary molding cavity, the position of the rear mold secondary molding cavity is located corresponding to the position of the front mold secondary molding cavity, a plurality of ejector pins are provided and are respectively mounted on ejector pin plates, and the ejection ends of the ejector pins are respectively located in the rear mold primary molding cavity and the rear mold secondary molding cavity; One end of the first rear mold injection molding area is provided with a first hardware end positioning hole, the other end of the first rear mold injection molding area is provided with a first hardware positioning insert, and the first hardware positioning insert is provided with a second hardware end positioning hole; One end of the second rear mold injection molding area is provided with a left end forming insert, a right end forming insert and a middle end forming insert located in the groove of the rear mold core, the middle end forming insert is located between the left end forming insert and the right end forming insert, the left end forming insert, the right end forming insert and the middle end forming insert are combined to form a connecting line end forming cavity, the top of the middle end forming insert is provided with a third hardware end positioning hole, the other end of the first rear mold injection molding area is provided with a second hardware positioning insert, and the second hardware positioning insert is provided with a fourth hardware end positioning hole; The preparation method comprises the following steps: (1) Place the connecting wire hardware in the first rear mold injection area on the rear mold core surface of the rear mold mechanism, insert one end of the connecting wire hardware into the first hardware end positioning hole, and insert the other end of the connecting wire hardware into the second hardware end positioning hole on the first hardware positioning insert, and clamp the connecting wire hardware by the first hardware fixture, so that the connecting wire hardware can pass through each rear mold molding cavity at one time; (2) closing the front mold mechanism and the rear mold mechanism, and injecting the plastic material into each front mold primary molding cavity and each rear mold primary molding cavity, thereby forming a spaced-apart primary molding shell outside the connecting wire hardware; (3) The front mold mechanism and the rear mold mechanism are opened, and the connecting wire hardware of the once-molded shell is transferred to the second rear mold injection area on the surface of the rear mold core, so that one end of the connecting wire hardware is inserted into the third hardware end positioning hole of the middle end molding insert, and the other end of the connecting wire hardware is inserted into the fourth hardware end positioning hole of the second hardware positioning insert, and the once-molded shell outside the connecting wire hardware is clamped by the second hardware clamp, so that the connecting wire hardware can pass through each rear mold secondary molding cavity; (4) The front mold mechanism and the rear mold mechanism are again closed, and the plastic material is injected into each front mold secondary molding cavity and each rear mold secondary molding cavity, thereby forming a secondary molding shell connected to each primary molding shell on the outside of the connecting wire hardware; (5) Open the front mold mechanism and the rear mold mechanism, and take out the metal-coated connecting wires that have been completed by injection molding.

2. The method for preparing the metal-coated connecting wire according to claim 1, characterized in that: A hardware limiting insert is provided in the first rear mold injection area.

3. The method for preparing the metal-coated connecting wire according to claim 1, characterized in that: A hardware positioning block is provided in the first front mold injection area, and a hardware positioning groove is provided in the first rear mold injection area. When the front mold mechanism and the rear mold mechanism are closed, the hardware positioning block is placed in the hardware positioning groove.

4. The method for preparing a metal-coated plastic connecting wire according to any one of claims 1 to 3, wherein: The first hardware fixture and the second hardware fixture both include a fixture body, one end of the fixture body is provided with a middle groove located in the middle position thereof and a first clip and a second clip located in the middle groove, and the first clip and the second clip are symmetrically arranged.

5. The method for preparing the metal-coated rubber connecting wire according to claim 2, characterized in that: When the connecting wire hardware is provided with a first bent portion protruding toward the outside of the rear mold core, the first bent portion of the connecting wire hardware is placed on the periphery of the hardware limiting insert in the first rear mold injection zone for limiting.

6. The method for preparing the metal-coated connecting wire according to claim 3, characterized in that: When the connecting wire hardware is provided with a second bent portion that is concave toward the back side of the rear mold core, the second bent portion of the connecting wire hardware is placed in the hardware positioning pressing groove of the first rear mold injection area, and when the front mold mechanism and the rear mold mechanism are closed, the second bent portion of the connecting wire hardware is pressed by the hardware positioning pressing block of the first front mold injection area.

7. The method for preparing the metal-coated connecting wire according to claim 1, characterized in that: An undercut is provided at the connection between the primary molded shell and the secondary molded shell for increasing the connection strength between the two.

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