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Because polycarbonate molecular mechanism contains flexible polycarbonate base and rigid benzene ring so that it has special properties not available in many other engineering plastics. Due to the structure of bisphenol a polycarbonate special polycarbonate has good light transmittance, high glass transition temperature, chemical modification, easy physical modification, and good impact toughness, creep resistance and electrical insulation resistance, weather resistance, physiological inert and a series of unique special advantages of ideal. Make its application scope rapidly expand, become one of the fastest growing engineering plastics varieties, and therefore subject to all of the world's major industrial powers of great concern, has now become the five major engineering plastics in the fastest growing general engineering plastics. Polycarbonate product purity and high transparency, excellent comprehensive performance, widely used in the fields of automotive, construction, packaging, medical treatment and health care, household appliances, aviation, aerospace, electronic computer and CD, etc.
According to the design task book, the design of an annual output of 3000 tons of polycarbonate sheet workshop. Through access to a lot of literature and research internships, Polycarbonate sheet general performance and process performance are summarized, the production process of polycarbonate sheet is scientific proof, material, heat is balance, extrusion machine, three roller calender machine type was selected precise calculation. The budget of the workshop management and production organization and the economic estimates of the project are planned, the extrusion molding technology of PC 3000t sheet of annual output is determined, and its raw material is feasible, and the workshop management and production organization is improved. The characteristics of the design is to maximize the streamline production, improve production efficiency, improve the utilization rate of raw materials, and make the products meet market requirements from the plant layout to the workshop production process and waste treatment.
The design task PC sheet the total annual production of 3000 tons, according to the calculation, shifts continuous production, three classes a day, production line two, according to an annual output of 3000 tons of polycarbonate sheet metal process design of the layout design of the workshop, the design workshop features rectangular double plant room. Workshop size (length x width x height) is 35m x 24m x 14m. Plant location according to natural geographical features, transportation conditions, water and power supply conditions, construction conditions and workers residential conditions and other principles for optimization.This design also gives full consideration to the safety and environmental protection issues. In the production process, require that all personnel should obey strictly the regulation to operate, and usually attend the related training to know about the relevant information. In the environment protection part, wastewater and noise should be ejected with strict requirement.
The design of the design task according to the task, the smooth completion of the PC sheet extrusion molding process design. Throughout the design, I have a comprehensive understanding of the production process of PC sheets.. And according to the professional knowledge, combined with their own experience in cognitive practice, flexible application, for the future in the production and management to lay a certain foundation.
Under the teacher Xu Chunhua’s guiding, I have got many valuable suggestions to accomplish the design of the PC sheet workshop process section. Here, I express my sincere thanks to him. As PC sheet extrusion process design involves a wide range of knowledge, and my limited knowledge and experience, so if there is design errors and inappropriate, ask the teacher criticism and correction.
Keywords: Polycarbonate sheet; PC sheet; extrusion molding; workshop design
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