Method for making electronic detonator lead wires that are not prone to short circuits

Abstract

This invention relates to the field of civil explosives, and more particularly to a method for manufacturing electronic detonator leads that are less prone to short circuits. The method cleverly utilizes cylindrical limiting posts as limiting tools to alternately and equally spacedly spirally wind one end of the positive lead and one end of the negative lead around a positioning rod. Then, by removing the positioning rod and translating the spiral segments, a plastic plug is formed through injection molding. This creates a spatially intertwined shape between the positive and negative spiral segments within the plastic plug, resulting in a larger volume and surface area for the positive and negative leads. This significantly improves the tensile strength of the leads. Because the spiral diameter is sufficiently large during the spiral winding process, the bending degree of the leads is very small. Compared to the traditional twisted shape, this effectively avoids damage to the insulation layer caused by excessive bending of the leads. Furthermore, the translation ensures sufficient spacing between the positive and negative leads, effectively preventing short circuits within the plastic plug.

Description

Technical Field

[0001] This invention relates to the field of civil explosives, and in particular to a method for manufacturing electronic detonator leads that are not prone to short circuits. Background Technology

[0002] Electronic detonator lead wires consist of two conductors and an outer sheath covering the conductors. In the manufacturing process of electronic detonator lead wires, one end of each of the two conductive leads needs to be exposed outside the outer sheath, and the two conductors are twisted together. The twisted wire core is then placed in the injection molding cavity for injection molding, so that the twisted wire core is embedded in the injection-molded plastic plug.

[0003] Since the conductor consists of a metal core and an outer insulating layer, in the above process, to prevent short circuits between the two conductors, the metal core must not be exposed at the point where the two conductors are twisted. Otherwise, a short circuit is very likely to occur. However, when the two conductors are twisted together, the insulating layer thins and weakens at the center of the twist, leading to exposed cores and loose connections. Furthermore, the twisted shape results in a very small gap between the two conductors, making it difficult for injection molding to penetrate this tiny gap. Therefore, injection molding itself cannot completely insulate the two conductors, leaving them at risk of short circuits under external energy. Moreover, troubleshooting short circuits is difficult.

[0004] Therefore, there is an urgent need to provide a method for manufacturing electronic detonator leads that are not prone to short circuits. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for manufacturing electronic detonator leads that are not prone to short circuits.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] The method for making electronic detonator lead wires that are not prone to short circuits includes the following steps:

[0008] Step 1: Alternately and equally spacedly spirally wrap one end of the positive electrode wire and one end of the negative electrode wire of the detonator around the positioning rod;

[0009] Step 2: Remove the cylindrical positioning rod, and move the spiral sections of the positive and negative wires a short distance to make the spiral axes of the positive and negative wires parallel. Place the spiral sections of the positive and negative wires in the plastic plug injection mold and adjust the ends of the positive and negative wires to be parallel to each other.

[0010] Step 3: Inject plastic into the plastic plug injection mold to form a plastic plug, so that the spiral sections of the positive and negative wires are embedded in the plastic plug.

[0011] Furthermore, in the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits, in step 1, the spiral spacing between adjacent positive and negative conductors is 2-4 mm.

[0012] Furthermore, in the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits, in step 1, the positioning rod is cylindrical in shape.

[0013] Furthermore, in the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits, the diameter of the positioning rod is 5-7mm.

[0014] Furthermore, in the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits, step 2, specifically shifting the spiral portions of the positive and negative leads by a small distance, means shifting the spiral portions of the positive and negative leads by 1-2 mm.

[0015] Furthermore, in the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits, the positioning rod is elliptical in shape.

[0016] Furthermore, in the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits, the elliptical major diameter of the positioning rod is 7-9 mm, and the minor diameter is 5-7 mm.

[0017] This invention also protects the electronic detonator leads obtained by the above-mentioned method for manufacturing electronic detonator leads that are not prone to short circuits.

[0018] The beneficial effects of this invention are as follows: In the method for manufacturing electronic detonator leads that are not prone to short circuits, the positive and negative leads of the electronic detonator are cleverly positioned using cylindrical limiting posts as limiting tools. One end of the positive lead and one end of the negative lead are alternately and equally spaced, spirally wound onto a positioning rod. Then, by removing the positioning rod and translating the spiral segment, a plastic plug is formed through injection molding. This results in the positive and negative spiral segments forming a spatially twisted shape within the plastic plug, creating a larger volume and surface area for the positive and negative leads. This significantly improves the tensile strength of the lead. Because the diameter of the spiral is large enough during the spiral winding process, the bending degree of the lead itself is very small. Compared with the traditional twisted shape, this effectively avoids damage to the insulation layer caused by excessive bending of the lead. Furthermore, the translation ensures sufficient spacing between the positive and negative leads, effectively preventing short circuits within the plastic plug. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structural state of the positive and negative conductors after step 2 in the method for manufacturing the short-circuit-resistant electronic detonator lead wire according to a specific embodiment of the present invention.

[0020] Figure 2 for Figure 1 Enlarged view of part A;

[0021] Figure 3 A schematic diagram of the plastic plug structure involved in the method for manufacturing a short-circuit-resistant electronic detonator lead wire according to a specific embodiment of the present invention.

[0022] Label Explanation:

[0023] 1. Positive electrode wire; 2. Negative electrode wire; 3. Outer sheath; 4. Plastic plug. Detailed Implementation

[0024] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0025] Please refer to Figures 1 to 3 The present invention relates to a method for manufacturing electronic detonator leads that are not prone to short circuits, comprising the following steps:

[0026] Step 1: Alternately and equally spacedly spirally attach one end of the positive electrode wire 1 and one end of the negative electrode wire 2 of the detonator to the positioning rod;

[0027] Step 2: Remove the cylindrical positioning rod, and move the spiral parts of the positive wire 1 and the negative wire 2 a small distance to make the spiral axes of the positive wire 1 and the negative wire 2 parallel. Place the spiral sections of the positive wire 1 and the negative wire 2 in the injection mold of the plastic plug 4, and adjust the wire ends of the positive wire 1 and the negative wire 2 to a parallel state.

[0028] Step 3: Inject the plastic plug 4 into the injection mold to form the plastic plug 4, so that the spiral sections of the positive electrode wire 1 and the negative electrode wire 2 are embedded in the plastic plug 4.

[0029] In the above method, it should be noted that, before step 1, a small section of the outer sheath 3 is stripped from one end of the detonator lead wire to expose the positive conductor 1 and the negative conductor 2, which are protected by the outer sheath 3 and located inside the outer sheath 3.

[0030] In the above embodiments, the positive electrode wire 1 and negative electrode wire 2 of the electronic detonator cleverly utilize cylindrical limiting posts as limiting tools. One end of the positive electrode wire 1 and one end of the negative electrode wire 2 are alternately and equally spaced, spirally wound onto the positioning rod. Then, by removing the positioning rod and translating the spiral segment, a plastic plug 4 is formed by injection molding. This makes the positive and negative electrode spiral segments form a spatial twisted shape in the plastic plug 4, allowing the positive and negative electrode wires 2 to form a larger spatial volume and surface area in the plastic plug 4, thereby significantly improving the tensile strength of the lead wire. Because the diameter of the spiral is large enough during the spiral winding process, the bending degree of the wire itself is very small. Compared with the traditional twisted shape, it can effectively avoid the insulation layer damage caused by excessive bending of the wire itself. Furthermore, by translating, there is sufficient spacing between the positive and negative electrode wires 2, effectively preventing the lead wire from short-circuiting in the plastic plug 4.

[0031] In a preferred embodiment, in step 1, the spiral spacing between adjacent positive electrode wire 1 and negative electrode wire 2 is 2-4 mm.

[0032] In a preferred embodiment, the positioning rod in step 1 is cylindrical.

[0033] In a preferred embodiment, the diameter of the positioning rod is 5-7 mm.

[0034] In a preferred embodiment, in step 2, shifting the spiral portion of the positive electrode wire 1 and the negative electrode wire 2 by a small distance specifically means shifting the spiral portion of the positive electrode wire 1 and the negative electrode wire 2 by 1-2 mm.

[0035] In a preferred embodiment, the positioning rod is elliptical in shape.

[0036] In a preferred embodiment, the elliptical major diameter of the positioning rod is 7-9 mm, and the minor diameter is 5-7 mm.

[0037] In the above embodiments, it should be noted that when the positioning rod is elliptical in shape, the positive electrode wire 1 and the negative electrode wire 2 form an elliptical spiral structure after being wrapped. In step 2, the spiral part of the positive electrode wire 1 and the negative electrode wire 2 is translated a small distance in the direction of the short diameter. The translation distance is equivalent to the difference between the major diameter and the minor diameter of the ellipse, so that the diameters of the double spiral structure after translation are nearly consistent. This can further increase the contact surface area and space volume between the positive and negative wires and the plastic plug 4, thereby further improving the tensile strength of the detonator lead wire.

[0038] Example 1

[0039] The method for making electronic detonator lead wires that are not prone to short circuits includes the following steps:

[0040] Step 1: Alternately and equally spacedly spirally attach one end of the positive electrode wire 1 and one end of the negative electrode wire 2 of the detonator to a cylindrical positioning rod with a diameter of 6mm; the spiral interval between adjacent positive electrode wires 1 and negative electrode wires 2 is 3mm;

[0041] Step 2: Remove the cylindrical positioning rod, and move the spiral parts of the positive electrode wire 1 and the negative electrode wire 2 by 2mm so that the spiral axes of the positive electrode wire 1 and the negative electrode wire 2 are parallel. Place the spiral sections of the positive electrode wire 1 and the negative electrode wire 2 in the injection mold of the plastic plug 4, and adjust the wire ends of the positive electrode wire 1 and the negative electrode wire 2 to a parallel state.

[0042] Step 3: Inject the plastic plug 4 into the injection mold to form the plastic plug 4, so that the spiral sections of the positive electrode wire 1 and the negative electrode wire 2 are embedded in the plastic plug 4.

[0043] When the obtained electronic detonator lead wire is subjected to a static tensile force of 29.6N for 2 minutes at room temperature, there should be no breakage or damage to the core wire and insulation layer of the lead wire.

[0044] Example 2

[0045] The method for making electronic detonator lead wires that are not prone to short circuits includes the following steps:

[0046] Step 1: Alternately and equally spacedly spirally attach one end of the positive electrode wire 1 and one end of the negative electrode wire 2 of the detonator to the elliptical positioning rod. The major diameter of the ellipse of the positioning rod is 8mm and the minor diameter is 6mm. The spiral interval between adjacent positive electrode wires 1 and negative electrode wires 2 is 3mm.

[0047] Step 2: Remove the cylindrical positioning rod, and move the spiral parts of the positive electrode wire 1 and the negative electrode wire 2 by 2mm so that the spiral axes of the positive electrode wire 1 and the negative electrode wire 2 are parallel. Place the spiral sections of the positive electrode wire 1 and the negative electrode wire 2 in the injection mold of the plastic plug 4, and adjust the wire ends of the positive electrode wire 1 and the negative electrode wire 2 to a parallel state.

[0048] Step 3: Inject the plastic plug 4 into the injection mold to form the plastic plug 4, so that the spiral sections of the positive electrode wire 1 and the negative electrode wire 2 are embedded in the plastic plug 4.

[0049] When the obtained electronic detonator lead wire is subjected to a static tensile force of 29.6N for 2 minutes at room temperature, there should be no breakage or damage to the core wire and insulation layer of the lead wire.

[0050] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for manufacturing electronic detonator lead wires that are not prone to short circuits, characterized in that, Includes the following steps: Step 1: Alternately and equally spacedly spirally attach one end of the positive electrode wire and one end of the negative electrode wire of the detonator to the positioning rod; the spiral interval between adjacent positive and negative electrode wires should be 2-4mm; Step 2: Remove the cylindrical positioning rod, and move the spiral parts of the positive and negative wires by 1-2mm to make the spiral axes of the positive and negative wires parallel. Embed the spiral sections of the positive and negative wires in the plastic plug injection mold, and adjust the ends of the positive and negative wires to be parallel to each other. Step 3: Inject the plastic plug into the injection mold to form a plastic plug, so that the spiral sections of the positive and negative wires are embedded in the plastic plug.

2. The method for manufacturing electronic detonator leads that are not prone to short circuits according to claim 1, characterized in that, The diameter of the positioning rod is 5-7mm.

3. An electronic detonator lead wire, characterized in that, It is prepared by the method for manufacturing electronic detonator leads that are not prone to short circuits as described in any one of claims 1-2.

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