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Metal spraying technology for motor capacitor

A capacitor and process technology, applied in the field of gold spraying process of motor capacitors, can solve the problems that the qualified rate of finished products does not exceed 92%, the structure of zinc oxide is loose and not dense, and the gold spray layer and the end surface of the winding core are not well bonded, so as to achieve the improvement of bonding force Effect

Inactive Publication Date: 2018-05-11
HUANGSHAN SHENGE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high melting point, the requirements for the welding power supply in the subsequent process are relatively high, and the current high-purity zinc wire is easily oxidized to zinc oxide when spraying gold, and the structure of zinc oxide is loose and not dense. Poor combination with the end face of the winding core, the pass rate of finished products generally does not exceed 92%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] After hot-pressing and shaping the wound core, it is bound with adhesive tape, and then sent to a rotary arc-spraying gold spraying machine, and the two ends of the core are sprayed with zinc-lithium-bismuth rare-earth alloy layers respectively, and the zinc-lithium-bismuth rare-earth alloy layer is mainly The weight percentage of composition is Li: 13.1~13.5%, Bi: 8.9~9.1%, rare earth: 0.2~0.25%, the rest is Zn; The described rare earth is composed of Ce and Sm, and the weight ratio of Ce and Sm in the described rare earth is (12~12.1): 1. Then, an aluminum-zinc alloy layer is sprayed on the zinc-lithium-bismuth rare earth alloy layer, the main composition of the aluminum-zinc alloy layer is Al: 63-65% by weight, and the rest is Zn. Wherein, the vertical distance from the mouth of the arc spray gun in the turntable type arc gold spraying machine to the coating surface of the winding core is 160-180 mm. The thickness of the aluminum-zinc alloy layer is 0.5-0.55mm, and ...

Embodiment 2

[0018] After hot-pressing and shaping the wound core, it is bound with adhesive tape, and then sent to a rotary arc-spraying gold spraying machine, and the two ends of the core are sprayed with zinc-lithium-bismuth rare-earth alloy layers respectively, and the zinc-lithium-bismuth rare-earth alloy layer is mainly The weight percentage of composition is Li: 13.3~13.6%, Bi: 9.1~9.3%, rare earth: 0.22~0.26%, the rest is Zn; The described rare earth is composed of Ce and Sm, and the weight ratio of Ce and Sm in the described rare earth is (12.1~12.2): 1. Then an aluminum-zinc alloy layer is sprayed on the zinc-lithium-bismuth rare earth alloy layer, the main composition of the aluminum-zinc alloy layer is Al: 65-68% by weight, and the rest is Zn. Wherein, the vertical distance from the mouth of the arc spray gun in the turntable type arc gold spraying machine to the coating surface of the winding core is 180-200mm. The thickness of the aluminum-zinc alloy layer is 0.57-0.6mm, and...

Embodiment 3

[0021] After hot-pressing and shaping the wound core, it is bound with adhesive tape, and then sent to a rotary arc-spraying gold spraying machine, and the two ends of the core are sprayed with zinc-lithium-bismuth rare-earth alloy layers respectively, and the zinc-lithium-bismuth rare-earth alloy layer is mainly The weight percent of composition is Li: 13.6~13.8%, Bi: 9.3~9.5%, rare earth: 0.26~0.3%, the rest is Zn; The described rare earth is composed of Ce and Sm, and the weight ratio of Ce and Sm in the described rare earth is (12.1~12.2): 1. Then, an aluminum-zinc alloy layer is sprayed on the zinc-lithium-bismuth rare earth alloy layer, the main composition of the aluminum-zinc alloy layer is Al: 66-68% by weight, and the rest is Zn. Wherein, the vertical distance from the mouth of the arc spray gun in the turntable type arc gold spraying machine to the coating surface of the winding core is 190-200mm. The thickness of the aluminum-zinc alloy layer is 0.5-0.6mm, and the...

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Abstract

The invention relates to a metal spraying technology for a motor capacitor. After being shaped through hot compression, a wound core is tied by an adhesive tape. Then, the core is conveyed into a rotating disc type electric arc metal spraying machine. The two end surfaces of the core are first sprayed with Zn-Li-Bi rare earth alloy layers, and then, Al-Zn alloy layers are sprayed on the Zn-Li-Bi rare earth alloy layers. Through the optimizing design of the existing metal spraying technology, by adopting the mode of first spraying the Zn-Li-Bi rare earth alloy layers and then spraying the Al-Znalloy layers on the Zn-Li-Bi rare earth alloy layers, bonding force between the metal spraying layers and the end surfaces of the core is obviously improved, and the qualified rate of the finished product can reach 99.1%.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a gold spraying process for motor capacitors. Background technique [0002] AC motor running capacitors are mainly used for starting and running various AC motors, such as washing machines, shredder pumps, water pumps, air compressors, etc. The product has the characteristics of stable capacitance performance, excellent self-healing performance, low loss, long life, high insulation resistance, flame-retardant insulating plastic shell, and built-in flame-retardant epoxy resin filling is safe and reliable. [0003] At present, most of the gold-sprayed motor capacitors use low-cost high-purity zinc wire. The melting point of high-purity zinc wire is around 420°C, and it is generally used as a primer. However, due to the high melting point, the requirements for the welding power supply in the subsequent process are relatively high, and the current high-purity zinc wire is easily ...

Claims

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Application Information

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IPC IPC(8): C23C4/131C23C4/08
CPCC23C4/131C23C4/08C23C28/021
Inventor 李先俊张宏远
Owner HUANGSHAN SHENGE ELECTRONICS TECH
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