Preparation method of hardware rubber-coated connecting wire and mold of hardware rubber-coated connecting wire

Abstract

The invention discloses a preparation method of a hardware rubber-coated connecting line and a mold thereof, a specially-made preparation mold is adopted to position connecting line hardware and carry out injection molding on a plastic shell twice, and during injection molding of the plastic shell, the plastic shell is split into multiple sections; according to the invention, the primary molding shell of the plastic shell is firstly injected in the first injection area of the mold, the exposed part of the connecting line hardware can be fixed on the mold and cannot deviate, and after the primary injection is completed, the secondary injection of the plastic shell is carried out in the second injection area of the mold; according to the invention, the secondary molding shell connected with the primary molding shell is injection-molded outside the connecting line hardware, and in the secondary injection molding process, the primary molding shell can play a role in fixing when the mold is closed, so that the connecting line hardware can be prevented from uncontrollably deforming or displacing when the shell is injection-molded; and the problem that the connecting line hardware is exposed on the surface of the plastic shell to cause the function failure of the plastic shell is avoided.

Description

Technical Field

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

[0002] Existing hardware-coated rubber-type connecting wires (such as car lock connecting wires) can be made of conductive hardware and plastic shells, and the plastic shell plays an insulating role. In the preparation process of such connecting wires, the plastic shell needs to be injection-molded onto the outside of the hardware through a mold. However, when the length of the hardware-coated rubber-type connecting wire is relatively long, the following problems will arise during the preparation process: the longer hardware will lack support points in the mold, and when the plastic shell is injected, the impact force generated by the plastic material entering the mold cavity causes the hardware to deform or displace uncontrollably, thereby exposing the hardware to the surface of the plastic shell, rendering the function of the plastic shell ineffective. Summary of the invention

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

[0004] To achieve the above-mentioned purpose, the first aspect of the present invention provides a hardware rubber-coated connecting wire preparation mold, including a front mold mechanism and a rear mold mechanism capable of being molded with the front mold mechanism, the front mold mechanism including a front mold bottom plate, a front mold middle plate, a front mold plate, a front mold core and a glue feed nozzle, the front mold middle 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 with the front mold primary molding cavity and the front mold secondary molding cavity through the front mold flow channel;

[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, wherein 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 a 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 one-time molding cavities arranged at intervals and at least one group of first hardware fixtures, the first hardware fixtures are located in the arrangement of the rear mold one-time molding cavities The second rear mold injection molding 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 mounted on ejector pin plates, and the ejector 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 zone, a first hardware positioning insert is provided at the other end of the first rear mold injection zone, 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 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 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] The second aspect of the present invention provides a method for preparing a hardware-coated rubber-coated connecting wire, wherein the hardware-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 wherein the plastic shell is formed by alternately connecting a primary molded shell and a secondary molded shell, and the hardware-coated rubber-coated connecting wire is prepared by using the hardware-coated rubber-coated connecting wire preparation mold described in the above technical solution, and the preparation method comprises the following steps:

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

[0013] (2) closing the front mold mechanism with the rear mold mechanism, and injecting plastic material into each of the front mold primary molding cavities and each of the rear mold primary molding cavities, thereby forming a primary molding shell disposed at intervals 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 molded together, and the plastic material is injected into each of the front mold secondary molding cavities and each of the rear mold secondary molding cavities, thereby forming a secondary molded shell connected to each of the primary molded shells on the outside of the connecting wire hardware;

[0016] (5) Open the front mold mechanism and the rear mold mechanism, and take out the injection-molded hardware rubber-coated connecting wires.

[0017] Preferably, when the connecting wire hardware is provided with a first bending portion protruding toward the outer side of the rear mold core, the first bending 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.

[0018] Preferably, when the connecting wire hardware is provided with a second bent portion which is concavely arranged on 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.

[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, and the primary molded shell of the plastic shell is firstly injected in the first injection molding 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 molding area of ​​the mold, and the 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 invalid.

[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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 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 It is a schematic diagram of the structure of the hardware rubber-coated connecting wire provided by an embodiment of the present invention after one-time injection molding;

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

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

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

[0029] Figure 6 is a schematic structural diagram of a front mold core provided by an embodiment of the present invention;

[0030] Figure 7 is a structural schematic diagram of a rear mold mechanism provided by an embodiment of the present invention;

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

[0032] Fig. 9 is a schematic structural diagram of a rear mold core provided by an embodiment of the present invention;

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

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

[0035] Fig.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] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Please refer to Figure 1 and Figure 3 The figure shows a hardware-coated rubber 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 disposed toward the outside and a second bending portion 102 concavely disposed 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 may be provided with an undercut 203 for increasing the connection strength between the two. The undercut 203 may 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 various components of this embodiment are described in detail below 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, 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, the first front mold injection area is provided with at least one row of front mold primary molding cavities 16 (preferably two rows) arranged at intervals, the second front mold injection area is provided with at least one row of front mold secondary molding cavities 17 (preferably two rows), 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 with the front mold primary molding cavity 16 and the front mold secondary molding cavity 17 through the front mold flow channel.

[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 a 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 The rear mold primary molding cavity 27 is arranged on the arrangement path of the cavity 27 and is located between at least two rear mold primary molding cavities 27. The position of the rear mold primary molding cavity 27 is located corresponding to the position of the front mold primary molding cavity 16. The second rear mold injection area is provided with at least one row of rear mold secondary molding cavities 29 (preferably two rows) and at least one group of second hardware fixtures 210 (preferably two groups, two in each group). The second hardware fixture 210 is located on the extension path of the rear mold secondary molding cavity 29. The position of the rear mold secondary molding cavity 29 is located corresponding to the position of the front mold secondary molding cavity 17. A plurality of ejector pins 26 are provided and respectively installed on the ejector pin plate 25. The ejector ends of the ejector pins 26 are respectively located in the rear mold primary molding cavity 27 and the rear mold secondary molding cavity 29. The ejector pins 26 play a role in demoulding after the product 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 Fig. 9 and Fig.10 As shown, a first hardware end positioning hole 211 is provided at one end of the first rear mold injection zone, a first hardware end positioning insert 212 is provided at the other end of the first rear mold injection zone, and a second hardware end positioning hole 213 is provided on the first hardware end positioning insert 212.

[0046] like Fig.10 and Fig.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 groove of the rear mold core 24, 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, 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 Fig. 9 As shown, a hardware limiting insert 220 may also be provided in the first rear mold injection area.

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

[0049] like Fig.11 As shown, the first hardware fixture 28 and the second hardware fixture 210 may include a fixture body 281, one end of which 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 the present embodiment comprises the following steps:

[0051] (1) placing 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, inserting one end of the connecting wire hardware 10 into the first hardware end positioning hole 211, inserting 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 clamping 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 molded together, and the plastic material is injected into each front mold primary molding cavity 16 and each rear mold primary molding cavity 27, thereby forming a spaced primary molding shell 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 clamp 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 molded together again, and the plastic material is injected into each front mold secondary molding cavity 17 and each rear mold secondary molding cavity 29, so as to form a secondary molded shell 202 connected to each primary molded shell 201 on the outside of the connecting wire hardware 10;

[0055] (5) The front mold mechanism 1 and the rear mold mechanism 2 are opened, and the injection-molded hardware rubber-coated connecting wires are taken out.

[0056] When the connecting wire hardware 10 is provided with a first bending portion protruding toward the outer side of the rear mold core 24, the first bending 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 which is concavely arranged toward the back side 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 molding 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 molding area.

[0058] In summary, 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 firstly injected in the first injection molding 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 molding area of ​​the mold, and the 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 made without departing from the spirit and principles of the present invention shall be equivalent replacement methods and shall be included in the protection scope of the present invention.

Claims

1. A mold for preparing a hardware rubber-coated connecting wire, comprising a front mold mechanism and a rear mold mechanism capable of being molded with the front mold mechanism, characterized in that: The front mold mechanism comprises a front mold bottom plate, a front mold middle plate, a front mold plate, a front mold core and a glue feed nozzle, the front mold middle 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 with 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, wherein 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 a 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 one-time molding cavities arranged at intervals and at least one group of first hardware fixtures, the first hardware fixtures are located in the arrangement of the rear mold one-time molding cavities The second rear mold injection molding 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 mounted on ejector pin plates, and the ejector ends of the ejector pins are respectively located in the rear mold primary molding cavity and the rear mold secondary molding cavity.

2. The mold for preparing the hardware rubber-coated connecting wire according to claim 1, characterized in that: A first hardware end positioning hole is provided at one end of the first rear mold injection zone, a first hardware positioning insert is provided at the other end of the first rear mold injection zone, and a second hardware end positioning hole is provided on the first hardware positioning insert.

3. The mold for preparing the hardware rubber-coated connecting wire according to claim 2, characterized in that: 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 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 zone is provided with a second hardware positioning insert, and the second hardware positioning insert is provided with a fourth hardware end positioning hole.

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

5. The mold for preparing the hardware rubber-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 molded together, the hardware positioning block is placed in the hardware positioning groove.

6. The mold for preparing the hardware rubber-coated connecting wire according to any one of claims 1 to 5, characterized in that: 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.

7. A method for preparing a hardware rubber-coated connecting wire, characterized in that: The hardware-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 alternately connecting a primary molded shell and a secondary molded shell. The hardware-coated rubber-coated connecting wire is prepared by using the hardware-coated rubber-coated connecting wire preparation mold according to claim 3, and the preparation method comprises the following steps: (1) placing the connecting wire hardware in the first rear mold injection area on the rear mold core surface of the rear mold mechanism, inserting one end of the connecting wire hardware into the first hardware end positioning hole, inserting the other end of the connecting wire hardware into the second hardware end positioning hole on the first hardware positioning insert, and clamping the connecting wire hardware by the first hardware clamp, so that the connecting wire hardware can pass through each rear mold primary molding cavity; (2) closing the front mold mechanism with the rear mold mechanism, and injecting plastic material into each of the front mold primary molding cavities and each of the rear mold primary molding cavities, thereby forming a primary molding shell disposed at intervals 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 molded together, and the plastic material is injected into each of the front mold secondary molding cavities and each of the rear mold secondary molding cavities, thereby forming a secondary molded shell connected to each of the primary molded shells on the outside of the connecting wire hardware; (5) Open the front mold mechanism and the rear mold mechanism, and take out the injection-molded hardware rubber-coated connecting wires.

8. The method for preparing the hardware rubber-coated connecting wire according to claim 7, characterized in that: When the connecting wire hardware is provided with a first bending portion protruding toward the outer side of the rear mold core, the first bending 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.

9. The method for preparing the hardware rubber-coated connecting wire according to claim 7, characterized in that: When the connecting wire hardware is provided with a second bent portion which is concavely arranged 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.

10. The method for preparing the hardware rubber-coated connecting wire according to claim 7, 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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