Corrosion-assistance liquid pump for etching machine of circuit board

Abstract

The invention discloses a corrosion-assistance liquid pump for an etching machine of a circuit board. The corrosion-assistance liquid pump comprises a pump body with a liquid inlet and a liquid outlet, a fixing board for fixedly mounting the pump body, a motor, a motor supporting connection board connected with the motor through a motor bearing, a rotating shaft which is located in the pump body and is connected with the rotating shaft in a shaft transmission manner at the upper end part, and an impeller which is fixedly arranged at the lower end part of the rotating shaft. The corrosion-assistance liquid pump is characterized in that a suction inlet of the impeller is mounted at the lower end part of the rotating shaft upward; the liquid inlet is located above the suction inlet of the impeller; the rotating shaft is made of a corrosion-assistance metal material; and the corrosion-assistance liquid pump further comprises a corrosion-assistance water seal between the motor bearing and the motor supporting connection board. The corrosion-assistance liquid pump provided by the invention solves the problem that the corrosion-assistance liquid pump generally goes wrong radically, so that the maintenance labor intensity and the equipment maintenance cost can be greatly reduced.

Description

technical field [0001] The invention relates to a corrosion-resistant liquid pump for a circuit board etching machine. Background technique [0002] At present, when the flexible circuit board industry etches the products, it generally adopts the method of etching and spraying to etch the copper on the surface of the products. The main core component to complete the spraying is the corrosion resistant liquid pump. Now equipment manufacturers generally choose corrosion-resistant pumps with plastic-coated stainless steel shafts. The joints between the plastic-coated parts and the stainless steel shaft are all sealed with sealing rings. Due to the strong corrosiveness of the etching solution and the high temperature during use (above 45°C), after a long period of use, the corrosive liquid will gradually penetrate from the joints and seals, eventually causing the etching solution to degrade the stainless steel. The shaft was damaged by corrosion and scrapped. In addition, du...

AI Technical Summary

Problems solved by technology

Due to the strong corrosiveness of the etching solution and the high temperature during use (above 45°C), after a long period of use, the corrosive liquid will gradually penetrate from the joints and seals, eventually causing the etching solution to degrade the stainless steel. The shaft was damaged by corrosion and scrapped

In addition, due to the limitation of the design structure, the corrosive liquid will flow upward along the axial direction, and the corrosive gas will often corrode the bearings of the corroded pump motor. Therefore, the bearings of the corroded pump motor are also frequently damaged. Phenomenon

These frequent failures have a great adverse effect on the production plan and product quality of the enterprise

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