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Method for stopping water of earth wire and earth wire

A grounding cable and grounding terminal technology, which is applied in the direction of connecting/terminating cables, insulating cables, insulating conductors/cables, etc., can solve problems such as troublesome waterproofing operations, and achieve the effect of simple and easy waterproofing operations

Inactive Publication Date: 2008-08-20
YAZAKI CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes waterproofing work troublesome

Method used

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  • Method for stopping water of earth wire and earth wire
  • Method for stopping water of earth wire and earth wire
  • Method for stopping water of earth wire and earth wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0062] Next, Embodiment 1 of the present invention (representing the case of using an ultraviolet curing type first sealing agent) will be described.

[0063] The wire cross-sectional area is 0.5mm 2 and 1.25mm 2 A pair of ground cables are crimped on the ground terminal. Subsequently, a first sealant (ultraviolet curable type) having a viscosity of 15 mPa·s was delivered in a dropwise manner in an amount of 25 microliters. Then, the second sealant having a viscosity of 5000 mPa·s was delivered in a droplet manner in an amount of 10 microliters. UV irradiation conditions are set to 100mW / cm 2 ×70 seconds.

[0064] As a result, 200kPa (approximately 2kgf / cm 2 ) above the waterproof characteristics. Even after standing at a temperature of 110° C. for 200 hours, the waterproof property of 200 kPa was maintained. The suction height of the first sealant was 20 mm for each ground cable.

Embodiment approach 2

[0066] Next, Embodiment 2 of the present invention (representing a case where a photocurable instant adhesive is used as the first sealing agent) will be described.

[0067] The wire cross-sectional area is 0.5mm 2 and 1.25mm 2 A pair of ground cables are crimped on the ground terminal. Then, 25 microliters of the first sealant (light-hardening type instant adhesive) having a viscosity of 15 mPa·s was delivered in drops. Then, 10 microliters of a second sealing agent (light-curing type instant adhesive) having a viscosity of 5000 mPa·s was delivered in drops. The light irradiation condition is set to 100mW / cm 2 (365nm) x 70 seconds.

[0068] As a result, 200kPa (approximately 2kgf / cm 2 ) above waterproof properties, even after 200 hours at a temperature of 110°C, the waterproof properties of 200kPa are still maintained. The suction height of the first sealant was 20 mm for each ground cable.

Embodiment approach 3

[0070] Next, Embodiment 3 of the present invention (representing the case of using a photocurable and thermosetting adhesive as the first sealing agent) will be described.

[0071] The wire cross-sectional area is 0.5mm 2 , 1.25mm 2 A pair of ground cables are crimped on the ground terminal. Subsequently, a first sealant (light-curing and thermosetting adhesive) having a viscosity of 200 mPa·s was delivered in a dropwise manner in an amount of 15 microliters. Next, perform 100mW / cm 2 (365 nm) x 70 seconds of light irradiation, and then thermally hardened at 80° C. for 1 hour.

[0072] As a result, 200kPa (approximately 2kgf / cm 2 ) above the waterproof characteristics. Even after standing at a temperature of 120°C for 100 hours, the waterproof property of 200kPa was maintained. The suction height of the first sealant was 5 mm for each ground cable.

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Abstract

The invention relates to a waterproof method for ground cables and the ground cables. In order to easily waterproof the ground wire applicable to automotive wiring, the contact angle of the bare wire (1a) with respect to the ground wire (1) is an acute angle, and the UV curing type has a viscosity of 15-500mPa·s The first sealant (6) drops on the bare wire. The second sealant (7) is then dropped on the first sealant (6). Ultraviolet rays are irradiated to the first sealant (6) and the second sealant (7). Therefore, even if the pressure inside the ground wire (1) is not reduced by suction, the first sealant (6) naturally penetrates into the core wire (1b) of the ground wire (1) and hardens. Even when two ground wires (1) are crimped on the ground connection terminal (2), an appropriate amount of the first sealant (6) can easily penetrate into each ground wire (1). It is also possible to use a light-curing or chemical reaction-type first sealant (6) instead of an ultraviolet-curable first sealant (6). Adhesives having multiple hardening functions (adhesives having two or more hardening functions) such as photocurable instant adhesives may also be used.

Description

technical field [0001] The present invention relates to a method of waterproofing a ground cable used in vehicle wiring and the like, and the ground cable itself. Background technique [0002] Fig. 11 is a plan view showing an example of a conventional ground cable. [0003] Generally, such a grounding cable is designed such that a grounding terminal is fixed at its end and the terminal is exposed to the outside, so that the grounding cable is connected to an appropriate grounding site (for example, a vehicle body). Therefore, moisture easily enters from the end of the grounding cable, and reaches the inside along the inner side of the cable. Therefore, in the case where the electronic control unit is provided at the end on the side opposite to the ground terminal, there is a risk that moisture will reach the electronic control unit and prevent its normal operation. This makes the grounding cable must be waterproofed. [0004] In the past, as such a waterproofing method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/70H01B7/282H01B13/32H02G1/14
CPCH01B7/285H01R4/184H01R13/5216
Inventor 岩崎谦治大桥吉春加纳宗明
Owner YAZAKI CORP
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