Three-way valve for air exhaust system of plate-shaped workpiece edge covering device

Abstract

The invention relates to a three-way valve for an air exhaust system of a plate-shaped workpiece edge covering device. The three-way valve comprises a main gas port, a valve plug, a connecting rod, acircuit case shell, a driving coil, an action cavity, a left in-place change-over switch, a left contact, a piston S pole, a piston N pole, a valve shell, a right contact, a right in-place change-overswitch, a wiring chamber, a gas distribution port, an inner positive pole wiring terminal Tpo, a valve positive pole wiring end Tpk, an earthing terminal G, an inner negative pole wiring end Tno anda valve negative pole wiring end Tnk. The main gas port is a straight bobbin cavity and communicates with the upper part and the lower part of the outside of the valve body through a left cavity of avalve sleeve, and the upper section and the lower section of the valve sleeve are respectively a head section and a tail section; a gas distribution port is formed at the head section by digging; thevalve plug is a cylindrical rod body serving as a structure, for the valve plug and the piston body being linked, through the connecting rod; the left section and the right section of the valve plug are respectively embedded into the valve plug and the piston body in a sleeving mode; the left section and the right section are coaxial with the valve plug and the piston body and constitute a rigid connection linkage mechanism with the valve plug and the piston body; and the middle section is positioned by an axle hole of a left and right cavity dividing wall of the valve shell and forms axial sliding fit with the axle hole.

Description

technical field [0001] The invention relates to a method for wrapping the side of a flat workpiece. Background technique [0002] In many production lines of flat-shaped products, there is a process of side-wrapping flat-shaped workpieces, especially for circuit board manufacturers. This type of production process is: wrapping the entire periphery of the flat-shaped workpiece with a special adhesive tape. At present, this kind of process is all done manually, and the result is that the consistency of the wrapping state is poor, and there are defects such as partial sticking, folds, and leaks in different parts. For the usual large and heavy boards, manual operation is more difficult. This is a bottleneck that seriously affects the process of related product production lines, hindering the automation of the entire production process. Therefore, it is urgent to develop an automatic method that can ensure the consistency of the wrapping state and replace the heavy manual ope...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the difficulties such as poor consistency of wrapping state, deficiencies such as deviation, folds, and leaks, and cumbersome manual wrapping operation, the invention provides a three-way valve for the exhaust system of the plate-shaped workpiece edge wrapping device, which consists of a main air port, a valve Plug, connecting rod, circuit case, driving coil, action cavity, left in-position switch, left contact, piston S pole, piston N pole, valve housing, right contact, right in-position switch, wiring chamber, air distribution port, Inner positive terminal T po , Valve positive terminal T pk , ground terminal G, inner negative terminal T no and valve negative terminal T nk constitute

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