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Current protector manufacturing method and PCB

A technology of current protector and PCB board, which is applied in fuse manufacturing, emergency protection device manufacturing, emergency protection device and other directions, can solve the problems of large and loose fuse cold resistance, improve resistance value accuracy and reduce production and manufacturing costs. , The effect of product size consistency is good

Active Publication Date: 2016-07-20
NANJING SART SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after a period of use, the product with the above-mentioned patented structure will loosen due to the weakening of the adhesion between the fuse and the end electrode under the impact of heat and cold, resulting in unfavorable phenomena such as the increase in the cold resistance of the fuse.

Method used

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  • Current protector manufacturing method and PCB
  • Current protector manufacturing method and PCB
  • Current protector manufacturing method and PCB

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 It is a longitudinal sectional view of the ultra-micro current protector according to the present invention. The structure of the protector includes an insulating shell 1 , a metal melt 2 , left and right end caps 3 and solder 4 . Wherein, the molten metal 2 is suspended in the insulating shell 1 , and the solder 4 is fixed and welded to the molten metal 2 inside the end cap 3 to form an electrical connection.

[0024] The PCB board is made of FR-4 material with a heat resistance temperature above 260°C;

[0025] The pressing of the PCB board is to use high-temperature-resistant PCB board adhesive glue on a press to bond two-layer boards under high temperature and high pressure to form a block product.

Embodiment 2

[0027] A kind of manufacture method that is used for the ultra-micro current protector of the present invention:

[0028] Two PCB boards are provided, and each PCB board is provided with a pressing alignment hole 51 for pressing and aligning the two PCB boards; and the left side of each PCB board is provided with at least one row of left cutting pairs Positioning holes 52 and at least one row of alignment holes 53 for the left center slot, and at least one row of alignment holes 54 for right cutting and at least one row of alignment holes 55 for right center slot are provided on the right side of each PCB. The alignment holes 52 for left cutting and the alignment holes 54 for right cutting are arranged symmetrically; the alignment holes 53 for the left center groove and the alignment holes 55 for the right center groove are also arranged symmetrically. Among them, the preset left and right center slot alignment holes are prepared for cutting the center slot below, and cutting ...

Embodiment 3

[0037] In step 1 described in Embodiment 2, due to the difference in the field of view of the PCB board cutting machine and the width of the entire PCB board, such as Figure 5 , Image 6 As shown, the four corners of the upper and lower PCB boards 5 and the middle positions of the sides are punched to form alignment holes 51 for product pressing, and then punched to form alignment holes 51 for product cutting according to the product size at a position in the four sides and the middle of the PCB board 5 . The horizontal both sides and a certain position in the middle of it are punched and formed product central groove aligning hole 59 according to the cutting groove width as the diameter. That is, the PCB board is also provided with a row of auxiliary center slot alignment holes 59 located in the middle of the left center slot alignment hole 53 and the right center slot alignment hole 55; A row of auxiliary cutting alignment holes 58 in the middle of the positioning holes 54...

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Abstract

The invention discloses a current protector manufacturing method. Through carrying out punching, grooving, laminating, re-cutting and the like on a PCB material, a PCB tube structure is manufactured, and the PCB tube structure serves as a protection casing to replace a transitional ceramic tube; then, through a fully-automatic protector assembling machine, the PCB tube, an end cap, a metal melt, soldering tin and the like are combined and soldered, and thus, the ultra-micro current protestor is obtained. On one hand, the low heat conductivity coefficient of the PCB tube is applied, influences on fusing characteristics of the metal melt by cooling of a protection casing can be reduced, and high dependence on the production device by basic characteristics of an mA-level small current product; and on the other hand; and on the other hand, by adopting the protection tube casing and end cap structure, the phenomenon that cold resistance becomes abnormally large under hot and cold impacts on a fuse and an end surface electrode in the prior art can be effectively solved.

Description

technical field [0001] The invention relates to an ultra-micro current protector, in particular to a manufacturing method of a tubular structure protector. Background technique [0002] In the prior art, insulating tubes based on ceramic or glass-ceramic materials are often used as protective shells for protectors, which have many excellent properties, such as high breaking capacity, high I 2 t and anti-surge capability, low cold resistance value, etc. However, ceramic materials usually have relatively high thermal conductivity. When the rated current in the circuit is at the mA level, the protector needs to be very sensitive to cut off the circuit quickly when the current is abnormal. At this time, the protector with ceramic tube structure will be affected by the production equipment. System fluctuations will cause twice the fusing characteristics of the dispersion, and even cause twice the fusing characteristics of the fast-acting protector, resulting in potential safety ...

Claims

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Application Information

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IPC IPC(8): H01H85/175H01H85/17H01H85/143H01H69/02
CPCH01H69/022H01H85/143H01H85/17H01H85/175
Inventor 南式荣杨漫雪刘明龙
Owner NANJING SART SCI & TECH DEV
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