Coating and baking all-in-one machine for PCB and control circuit for coating and baking all-in-one machine

Abstract

The invention relates to the electrical field of PCBs, and specifically to a coating and baking all-in-one machine for a PCB and a control circuit for the coating and baking all-in-one machine. The coating and baking all-in-one machine comprises a machine body, a coating roller, a scraper roller, an ink outlet pipe and a control panel, and also comprises board supporting mechanisms used for supporting PCBs of different widths, pushing mechanisms used for pushing PCBs to perform translational motion on the board supporting mechanisms, and a baking apparatus used for baking the completely-coated PCBs; each board supporting mechanism also can perform translational movement to be retracted and extended automatically according to the widths of the PCBs; the baking apparatus comprises a drying cover capable of being contracted automatically and a hot air pipe used for blasting the drying cover; the lower end of each PCB on the board supporting mechanism and the corresponding board supporting mechanism are in line contact; and the control circuit comprises a control unit, an electrical unit, a pneumatic unit, a pressure sensing unit, a temperature detection unit, an infrared detection unit and a counting unit. By adoption of the coating and baking all-in-one machine, the PCBs of any sizes can be conveyed in an overhead and anti-scraping manner; and meanwhile, heat can be fully utilized and energy loss can be reduced.

Description

technical field [0001] The invention relates to the field of electrical PCB boards, in particular to a PCB board coating and baking integrated machine and its control circuit. Background technique [0002] Most of the known PCB board coating machines include the steps of board feeding, coating and baking. In the coating step, the traditional PCB board oiling method adopts the operation method of roller oiling. In the traditional PCB During the process of oiling and conveying the board, because the bottom surface is in contact with the surface of the conveying roller, the oiling is easy to stick to the roller, resulting in uneven oiling of the PCB board, poor product quality, and low yield. Therefore, in view of the shortcomings of the traditional PCB board oiling technology, at the same time, some coating machines in the prior art use conical conveying wheels, which can support the two ends of the PCB board for overhead transportation, avoiding the surface coating of the PCB...

AI Technical Summary

Problems solved by technology

[0002] Most of the known PCB board coating machines include the steps of board feeding, coating and baking. In the coating step, the traditional PCB board oiling method adopts the operation method of roller oiling. In the traditional PCB During the process of oiling and conveying the board, because the bottom surface is in contact with the surface of the conveying roller, the oiling is easy to stick to the roller, resulting in uneven oiling of the PCB board, poor product quality, and low yield, etc.

Therefore, in view of the shortcomings of the traditional PCB board oiling technology, at the same time, some coating machines in the prior art use conical conveying wheels, which can support the two ends of the PCB board for overhead transportation, avoiding the surface coating of the PCB board. The oil contaminates the conveying wheel, but the PCB board entering the conical conveying wheel has a difference in friction due to the adhesion of impurities on the surface of each conical conveying wheel, which makes the PCB board tilt on the conical conveying wheel, and then The surface of the PCB board is oiled and rubbed against the conical conveying wheel, and the conical conveying wheel cannot adapt to the conveyance of PCB boards of various sizes. When the PCB board to be conveyed is a miniature PCB board for laboratories or small household appliances However, the conical conveying wheel cannot be applied to the requirements of conveying this kind of PCB board; in the baking step, the baking oven of the current PCB board coating machine includes a box body, a fan and a heating pipe arranged in the box body, The hot air outlet and return air outlet, etc. set on the above-mentioned box body, but there is a waste of heat, and the situation is not fully utilized.

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