QXY69 series Steel Pretrement shot blast Line mainly consist of lading and unloading mechanism, input and output roller converoy, preheating cabinet, blasting machine, paint spray cabinet, drying cabinet, automatic check system, dust collector and eletric control system. The products can be either operated in line or independently used according to users' demands. Whole line f the equipment is controlled by PLC (programmable logic control) system.

A position depositor and a photoeletric inspection device are used to antomatically measure the thickness and width of work-pieces being pretreated and adjust the width of hot-spot of thrown abrasives and the height of brush apparatus. The work speed of four segments of brush apparatus. The Work speed of four segments of roller conveyor in whole line is controlled by frequency conversion. The speed of either one segment or the whole line rollers can also be finely adjusted, thus, under the loading and unloading state, the high-accuracy of synchronous conveying can be achieved so that to ensure the shot blasting, paint spraying and drying result.