Waterproof treatment method for cable network of missile launching canister

Abstract

The invention relates to a waterproof treatment method for a cable network of a missile launch canister, which is used for inspecting an electric connector needing waterproof treatment in the cable network and manufacturing the electric connector according to process requirements. After manufacturing is completed, a mold shrinkage sleeve and a heat shrinkage pipe are sleeved from the wire outlet end of the electric connector, a hot melting adhesive tape is pasted, hot air is used for conducting heat shrinkage on the hot melting adhesive tape, the mold shrinkage sleeve and the heat shrinkage pipe, and the electric connector is sealed; and the epoxy resin glue is used to further enhance the bonding force and the sealing waterproof performance of the joint of the mold shrinkage sleeve and the electric connector and the joint of the mold shrinkage sleeve and the heat shrink tube, so that the filling sealing and the waterproof performance of the electric connector are realized. The wire harness is wrapped by the heat shrink tube, the hot melt adhesive tape is pasted, the hot melt adhesive tape, the mold shrinkage sleeve and the heat shrink tube are subjected to heat shrinkage sealing and processing by using hot air, and then the bonding force and the sealing waterproof performance of the joint of the heat shrink tube and the mold shrinkage sleeve are further enhanced by using the epoxy resin adhesive, so that filling sealing and waterproof performance of the wire harness are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic assembly manufacturing, and particularly relates to a waterproof treatment method for a missile launcher cable network. Background Art

[0002] The launcher cable network is one of the important components of the missile electrical system. It is the transmission channel for all external information of the missile, and is used for information exchange between the missile and the firing control system, between various devices inside the missile, and between the missile and ground test equipment. The launcher cable network in the outdoor environment is required to have good waterproof performance. In the prior art, in order to enable the missile to meet the working requirements of the outdoor environment, the cable network is avoided from being outside the launcher during the cable structure design. This design method has high requirements for the internal structure space of the launcher. Therefore, a waterproof treatment method for the launcher cable network is provided to improve the waterproof performance of the cable network to meet the working requirements of the missile in the outdoor environment. Summary of the Invention

[0003] The purpose of the present invention is to provide a waterproof treatment method for a missile launcher cable network to meet the working requirements of the missile in the outdoor environment.

[0004] The technical solution of the present invention is: to provide a waterproof treatment method for a missile launcher cable network, including the following steps:

[0005] Step 1: Inspect the electrical connectors in the missile launcher cable network that need to be waterproof-treated;

[0006] Step 2: Fabricate the electrical connectors in Step 1 according to the process requirements;

[0007] Step 3: Slip a shrinkable sleeve and a heat shrinkable tube onto the cable from the end of the wire harness towards the electrical connectors in Step 2 for later use;

[0008] Step 4: Fit the large end of the shrinkable sleeve to the electrical connector and the small end to the heat shrinkable tube covering the wire harness, and paste a heat-melt tape at the joint where the outer surfaces of the electrical connector, heat shrinkable tube and shrinkable sleeve are in contact;

[0009] Step 5: Use hot air to heat-shrink the heat-melt tape, shrinkable sleeve and heat shrinkable tube so that the shrinkable sleeve can tighten inward and cover the electrical connector, and the shrinkable sleeve and heat shrinkable tube can tighten inward and cover the cable at the root of the electrical connector, realizing the sealing and waterproof treatment of the electrical connector and the cable at the root;

[0010] Step 6: Coat epoxy resin glue at the joints between the heat-sealed electrical connector and the shrinkable sleeve and between the heat shrinkable tube and the shrinkable sleeve, and perform a curing treatment to fill the joints and bond for sealing and waterproofing;

[0011] Step 7: For the wire harnesses at the bifurcated parts in the cable network, slip the branch wire harnesses at each bifurcation into the shrink sleeve of the bifurcation mold for later use;

[0012] Step 8: Paste hot-melt tape at the joint where the outer surface of the heat shrinkable tube fits with the shrink sleeve of the bifurcation mold;

[0013] Step 9: Use hot air to heat shrink the hot-melt tape, the heat shrinkable tube, and the shrink sleeve of the bifurcation mold, so that the heat shrinkable tube and the shrink sleeve of the bifurcation mold shrink inward and wrap the wire harnesses at the bifurcation;

[0014] Step 10: Coat the joint between the heat shrinkable tube and the shrink sleeve of the bifurcation mold with epoxy resin glue and cure it to fill the joint of the wire harnesses at the bifurcation and seal for waterproofing;

[0015] Step 11: Fabricate the electrical connector at the end of the wire harness. Before fabricating the electrical connector at the end of the wire harness, slip the wire harness into the shrink sleeve first, with the small end of the shrink sleeve facing the direction of the wire harness and the large end facing the direction of the electrical connector, and then slip it into the heat shrinkable tube for later use;

[0016] Step 12: Fabricate the electrical connector at the end of the wire harness according to the process requirements;

[0017] Step 13: Conduct the sealing and waterproofing treatment for fabricating the electrical connector at the end of the wire harness according to Step 5 and Step 6;

[0018] Step 14: Use hot air to heat shrink the heat shrinkable tubes of each branch wire harness, so that the heat shrinkable tubes shrink inward to wrap the wire harnesses for waterproofing treatment.

[0019] Further, in Step 1, the electrical connector is one of a wire-connected electrical connector, a welded electrical connector, or a crimped electrical connector.

[0020] Further, in Step 4, the number of turns of the hot-melt tape pasted is 2 - 3 turns.

[0021] Further, in Step 4, the edge of the hot-melt tape is 2 - 4 mm away from the edge of the shrink sleeve.

[0022] Further, in Step 6, the curing time of the epoxy resin glue is 7 days.

[0023] Further, in Step 6, masking tape is wound around both sides of the joints between the electrical connector and the shrink sleeve and between the heat shrinkable tube and the shrink sleeve for 20 - 25 mm.

[0024] The beneficial effects achieved by the waterproof treatment method for the cable network of the missile launch tube provided by the present invention are:

[0025] The present invention effectively solves the problem that the electrical connectors and wire harnesses of the cable network in the missile launcher are affected by moisture and rain in outdoor environments such as rain, provides a strong guarantee for the reliability of the waterproof performance of the cable network in the missile launcher, and effectively ensures the normal use function and service life of the cable network. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the drawings:

[0027] Figure 1 It is a schematic diagram of the waterproof treatment of the cable network in the launcher of the present invention;

[0028] Figure 2(a) is the first part of the flowchart of the method for waterproof treatment of the cable network in the missile launcher of the present invention;

[0029] Figure 2(b) is the second part of the flowchart of the method for waterproof treatment of the cable network in the missile launcher of the present invention;

[0030] Description of the reference numerals in the drawings:

[0031] 1, 6, 11 - wire harnesses, 2, 8, 13 - heat shrinkable tubes, 3, 12 - molded shrinkable sleeves, 4, 9 - hot melt tapes, 5, 10 - epoxy adhesives, 7 - bifurcated molded shrinkable sleeve. SPECIFIC EMBODIMENTS

[0032] The following further describes in detail the method for waterproof treatment of the cable network in the missile launcher of the present invention with reference to the drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0033] The present invention is implemented through the following scheme: The method includes the following steps:

[0034] Step 1: Inspect the electrical connectors in the cable network of the launcher that need to be waterproofed. The surface of the electrical connectors should have no problems such as rust, mildew, cracks, etc.

[0035] Step 2: Fabricate the electrical connectors according to the process requirements.

[0036] Step 3: After the electrical connectors are fabricated, slip on the molded shrinkable sleeve 3 and the heat shrinkable tube 2 that exceeds the branch length from the wire outlet end of the electrical connectors for later use.

[0037] Step 4: Fit the large end of the molded shrinkable sleeve 3 to the electrical connector and the small end to the heat shrinkable tube covering the wire harness. Paste 2 - 3 turns of hot melt tape 4 on the outer surfaces (where they are in contact with the molded shrinkable sleeve) of the electrical connector and the heat shrinkable tube, so that the molded shrinkable sleeve completely covers the hot melt tape, and the edge of the hot melt tape should be 2 - 4 mm away from the edge of the molded shrinkable sleeve.

[0038] Step Five: Use the hot air heat-shrinkable hot melt tape 4, the shrinkage sleeve 3, and the heat shrinkable tube 2 until the rubber material overflows at the joints between the shrinkage sleeve and the electrical connector and between the shrinkage sleeve and the heat shrinkable tube, so that the shrinkage sleeve can tighten inward and wrap the electrical connector, and the shrinkage sleeve and the heat shrinkable tube tighten inward and wrap the cable at the root of the electrical connector, realizing the sealing and waterproofing treatment of the electrical connector and the root cable.

[0039] Step Six: After the shrinkage sleeve 3 is completely cooled, gently polish the outer layer of the shrinkage sleeve at the joint with sandpaper, and then wipe it clean with a clean non-woven fabric. Use a paintbrush to apply the epoxy resin glue 5 to the joints between the shrinkage sleeve and the electrical connector and between the shrinkage sleeve and the heat shrinkable tube respectively. When applying, wrap a circle of masking tape around 20 - 25 mm on both sides of each joint. The joint is located in the center of the tape interval. Apply evenly. After the glue stops flowing, tear off the masking tape. Let it stand and cure for 7 days to fill the joints and bond for sealing and waterproofing.

[0040] Step Seven: For the wire harness at the bifurcation part in the cable network, put the branch wire harness 6 at the bifurcation into the bifurcation shrinkage sleeve 7; if some of the bifurcated wire harnesses were not covered with a heat shrinkable tube before, a heat shrinkable tube 8 also needs to be put on and set aside for use.

[0041] Step Eight: Paste 2 - 3 circles of hot melt tape 9 on the outer surface of the heat shrinkable tube (the part that fits with the bifurcation shrinkage sleeve) so that the bifurcation shrinkage sleeve completely covers the hot melt tape, and the edge of the hot melt tape should be 2 - 4 mm away from the edge of the bifurcation shrinkage sleeve.

[0042] Step Nine: Use the hot air heat-shrinkable hot melt tape 9, the bifurcation shrinkage sleeve 7, and the heat shrinkable tube 8 until the rubber material overflows at the joint between the bifurcation shrinkage sleeve and the heat shrinkable tube, so that the heat shrinkable tube and the bifurcation shrinkage sleeve tighten inward and wrap the wire harness at the bifurcation, realizing the waterproofing treatment of the wire harness at the bifurcation in the cable network.

[0043] Step Ten: After the bifurcation shrinkage sleeve 7 is completely cooled, gently polish the outer layer of the bifurcation shrinkage sleeve at the joint with sandpaper, and then wipe it clean with a clean non-woven fabric. Use a paintbrush to apply the epoxy resin glue 10 to the joint between the bifurcation shrinkage sleeve and the heat shrinkable tube. When applying, wrap a circle of masking tape around 20 - 25 mm on both sides of each joint. The joint is located in the center of the tape interval. Apply evenly. After the glue stops flowing, tear off the masking tape. Let it stand and cure for 7 days to fill the joints and bond for sealing and waterproofing.

[0044] Step Eleven: Manufacture the electrical connector at the end of the wire harness. Before manufacturing the electrical connector, first put the wire harness 11 into the shrinkage sleeve 12 so that the small end of the shrinkage sleeve faces the direction of the wire harness and the large end faces the direction of the electrical connector, and then put it into the heat shrinkable tube 13 and set aside for use.

[0045] Step Twelve: Manufacture the electrical connector at the end of the wire harness according to the process requirements.

[0046] Step Thirteen: Perform waterproof sealing treatment on the electrical connectors made at the end of the wire harness according to the requirements of Steps Four to Six.

[0047] Step Fourteen: Use hot air to heat-shrink the heat-shrinkable tubes of each branch wire harness so that the heat-shrinkable tubes shrink inward to wrap the wire harness for waterproof treatment.

[0048] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention.

Claims

1. A waterproof treatment method for the cable network of a missile launcher tube, characterized in that, It includes the following steps: Step 1: Inspect the electrical connectors in the cable network of the missile launcher tube that need waterproof treatment; Step 2: Fabricate the electrical connectors in Step 1 according to the process requirements; Step 3: Slip on a shrink boot and a heat shrink tube along the end of the wire harness towards the electrical connectors in Step 2 for later use; Step 4: Fit the large end of the shrink boot to the electrical connector and the small end to the heat shrink tube covering the wire harness, and paste hot melt tape at the joint where the outer surface of the electrical connector, heat shrink tube fits with the shrink boot; Step 5: Use hot air to heat shrink the hot melt tape, shrink boot and heat shrink tube so that the shrink boot can tighten inward and cover the electrical connector, and the shrink boot and heat shrink tube can tighten inward and cover the cable at the root of the electrical connector to achieve sealing and waterproof treatment of the electrical connector and the root cable; Step 6: Apply epoxy resin glue at the joint between the electrical connector and the shrink boot after heat sealing and at the joint between the heat shrink tube and the shrink boot, and carry out curing treatment to fill the joint and bond for sealing and waterproofing; Step 7: For the wire harness at the bifurcated part in the cable network, slip on a bifurcated shrink boot for each bifurcated branch wire harness for later use; Step 8: Paste hot melt tape at the joint where the outer surface of the heat shrink tube fits with the bifurcated shrink boot; Step 9: Use hot air to heat shrink the hot melt tape, heat shrink tube, and bifurcated shrink boot so that the heat shrink tube and bifurcated shrink boot tighten inward and cover the wire harness at the bifurcated part; Step 10: Apply epoxy resin glue at the joint between the heat shrink tube and the bifurcated shrink boot and carry out curing treatment to fill the joint of the wire harness at the bifurcated part and seal for waterproofing; Step 11: Fabricate the electrical connector at the end of the wire harness. Before fabricating the electrical connector at the end of the wire harness, first slip on a shrink boot over the wire harness, with the small end of the shrink boot facing the wire harness direction and the large end facing the electrical connector direction, and then slip on a heat shrink tube for later use; Step 12: Fabricate the electrical connector at the end of the wire harness according to the process requirements; Step 13: Carry out sealing and waterproof treatment for fabricating the electrical connector at the end of the wire harness according to Step 5 and Step 6; Step 14: Use hot air to heat shrink the heat shrink tubes of each branch wire harness so that the heat shrink tubes shrink inward to cover the wire harness for waterproof treatment.

2. The waterproof treatment method for the cable network of a missile launcher tube according to claim 1, characterized in that, In Step 1, the electrical connector is one of a wire - type electrical connector, a welding - type electrical connector, or a crimping - type electrical connector.

3. The waterproof treatment method for the cable network of a missile launcher tube according to claim 1, characterized in that, In Step 4, the number of turns of the hot melt tape pasted is 2 - 3 turns.

4. The waterproof treatment method for the cable network of the missile launcher tube according to claim 1, characterized in that, In Step 4, the edge of the hot melt tape is 2 - 4 mm away from the edge of the shrink boot.

5. The waterproof treatment method for the cable network of a missile launcher tube according to claim 1, characterized in that In Step 6, the curing time of the epoxy resin glue is 7 days.

6. The waterproof treatment method for the cable network of a missile launcher tube according to claim 1, characterized in that In Step 6, masking tape is wound around both sides of the joint between the electrical connector and the shrink boot and the joint between the heat shrink tube and the shrink boot for 20 - 25 mm.

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