The Study Of Key Technology In Pneumatic Manipulator Used For Spreading Cut-Parts Automatically In Flat Screen Printing

There is a process that is used to spread the cut-part in flat screen printingprocess, a dress printers stand in a fixed position, spread a single cut-part from a pileof cut-parts taken form the cutting bed to the specified place at platen of square screenprinting machine, then the platen go forward to the next printing station, so there is aempty platen in the presence of the dress printer again, and the worker repeats theoperation all the time. Doing a simple and repetitive work for a long time has doneharm to dress printers’ physical and mental health, and it is a waste of human resourcein a certain degree.Pneumatic manipulator is a product which combines Electric-Machinery withElectrical Technology, and it has so many outstanding features such as simple instructure, convenience, inexpensive and environmental protection, so it is playing amore and more important role in modern industry.The thesis does a lot of research on the base of flat screen printing process,pneumatic position servo technology, PLC control technology and manipulatortechnology, and propose a pneumatic manipulator used to spread the cut-part insteadof manual work.The pneumatic manipulator adopts gas drive, it can moves on the X, Y, Z axis.The actuator consists of three rod less cylinders on the X, Y, Z axis, the model of rodless cylinder is ML2B made by SMC. Combine with CEU2(specially designed forML2B) and common magnetic exchange valve, the pneumatic manipulator can moveto any position accurately (usually0.5mm) in Cylinder stroke. The actuator is aspecially designed box, it can either pick up or break away from the cut-part, and it isdriven by a common double-acting cylinder.The control system of the pneumatic manipulator is PLC, it can control theposition controllers named CEU2and the magnetic exchange valve related to thedouble-acting cylinder, the CEU2then control the rest of magnetic exchange valves, so the movement of rod less cylinder can by controlled accurately.The thesis did some research on a kind of pneumatic manipulator used to spreadthe cut-part in flat screen printing process and presents a theory to realize spreadingcut-part automatically, and it wish to give some reference to realizing spreadingcut-part automatically.