Anti-oil-gathering device for upper plate edge and lower plate edge during electrostatic spraying

Abstract

The invention discloses an anti-oil-gathering device for an upper plate edge and a lower plate edge during electrostatic spraying. The device comprises a circuit substrate and a spray gun, wherein the circuit substrate is fixedly clamped in a clamp and is capable of moving forward and backward driven by the clamp, the spray gun is arranged in a sliding rail and is capable of moving upward and downward along the sliding rail, the spray gun is correspondingly arranged on the front side of the circuit substrate to be used for carrying out electrostatic spraying on the surface of the circuit substrate, an electrostatic screen is arranged on the rear side of the circuit substrate, a platform is arranged on the top of the electrostatic screen, and a grounding plate is arranged on the lower end of the circuit substrate. By the adoption of the device, since the electrostatic screen is arranged on the back of the circuit substrate, the platform is arranged on the top end of the electrostatic screen, and the grounding plate is arranged on the lower end of the circuit substrate, when the circuit substrate is sprayed, printing ink drifting from a plate edge was absorbed through the platform and the grounding plate, and thus the problem of oil gathering on the upper plate edge and the lower plate edge of the circuit substrate is effectively avoided.

Description

Technical field: [0001] The invention belongs to the technical field of PCB production, and in particular relates to a device for preventing oil accumulation on upper and lower board edges by electrostatic spraying. Background technique: [0002] Electrostatic spraying is a spraying method that uses a high-voltage electrostatic electric field to make negatively charged paint particles move in the direction opposite to the electric field, and adsorb the paint particles on the surface of the circuit substrate. This method can form a layer on the surface of the circuit board substrate Protective film to achieve the purpose of protecting the circuit. [0003] The current electrostatic spraying machine for printed circuit boards has been recognized by more and more circuit board manufacturers for its high production efficiency, convenient operation, and good quality assurance. like figure 1 As shown, when the current circuit substrate is electrostatically sprayed, firstly, the ...

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Problems solved by technology

[0006] For this reason, the purpose of the present invention is to provide a device for preventing the electrostatic spraying of oil on the upper and lower edges of the board, so as to solve the problem that the current electrostatic spraying machine carries out electrostatic spraying on the circuit substrate, and it is easy to cause spraying and oil accumulation on the upper and lower edges of the circuit substrate.

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