Design And Development Of Rubbing Machine

Since Liquid Crystal(LC) was applied to calculator display in 1976, it has been developed swiftly and violently in the field of display, because of its advantages, such as light, thin, energy saving and large display area. At the same time, Liquid Crystal Science harvests satisfyingly, its research field has extended to physics, chemistry, electronics, biology, etc.Surface orientation of Liquid Crystal Molecule (LCM) is a key technique in the application of LCD, the effect of orientation plays an important role in the basic performances, such as uniformity, visual angle, aberration, response, threshold of voltage and so forth. The surface orientation technique applied most widely in industrial manufacture of LCD (Liquid Crystal Display) is Rubbing Alignment Technology, whose technique is to rubbing the polyimide(PI) film laid on glass substrate with rubbing clothes, meanwhile this technique fits to be used in laboratory very much, as its simple flow and good orientation effect. This thesis aims to design and develop a rubbing machine used to obtain LCMs'orientation, which fits to be used in LAB.This thesis first collects and collates related papers, briefly studies function of alignment layer, rubbing technique, and performance examination, lays theoretical foundation for following main content. According to performance note of rubbing machines used in production line and experiment parameters recorded in former papers, target parameters are set down and overall programme is figured out. We make full use of devices provided, accomplish design, process, assembly and debug of hardware system, with mechanic system, air system and control system included, finish rational distribution of system via devising an electrical cabinet.In mechanic part, we adopt software Pro/E to carry out three-dimensional emulation and software AutoCAD to aid making engineer drawing, in this way, the powerful function of three-dimensional design is made full use of, and the disadvantage of engineer drawing function of Pro/E software is conquered; in control part, Mitsubishi PLC is used as the core to control electromotor and electromagnetic valves through design and compile control program. The...