年产4000吨塑料片材车间工艺设计(2)

菜单

在车间非工艺设计一章中，对车间人员的人数及其岗位进行了简要的安排。同时，也考虑了车间的供水供电、给水排队以及三废处理等问题。

在以原料消耗表、能量消耗表以及设备综合表为依据的前提下，综合考虑其他因素，对本设计的成本进行了估算，估算的结果可以作为本设计合理性的评判条件。

设计最后车间布置的内容，简单介绍了车间布置的要求与原则。结合设备选型以及生产工艺流程对车间进行布置，对此次设计的具体车间编排作了简要说明。其结果以车间布置平面图的形式呈现。

毕业论文关键词：片材；聚氯乙烯；车间设计

The information of general design

The graduation project is a process design of a plant which annual output of plastic sheet amounts to 4,000 tons. Considering the performance and the use of a variety of sheet and choose the good mechanical properties, versatile range of rigid PVC sheet, and to develop specifications for the sheet thickness 0.3mm, width ≥1000mm, color is white.

The design process generally as follows: from the introduction to the recipe description and molding method, from the total process to extrusion equipment components design parameters and calculations to determine the equipment selection, and finally calculate the material balance, energy balance to non-workshop process, economic accounting and plant layout, each of the design elements fully developed.

In the introduction, mainly introduces the characteristics and production status of polyvinyl chloride resin, introduced the classification of plastic sheets, sheet lists several common species, to compare their performance and use, and specifically describes the polyvinyl chloride sheet Features material. At the same time, the chapter clearly the purpose and significance of this design, and design specifications.

In the formulation section details the role of the components of the formulation, the type of each of the additives and raw materials commonly used. According rigid PVC characteristics, combined physical and mechanical properties of the sheets and other standards, the optimum formulation. Formulation design, select the required aid not only to consider the physical and chemical properties of the sheet, but also consider the interaction of the components of the formulation, whether the material is more easily accessible, whether reasonable price and other factors. Copies of each component to determine the ratio between. Finally, considering, in a list given in the recipe design table.

In the molding method selection section, we describe the common polyvinyl chloride resin molding method, calender molding and extrusion determine applicable to the characteristics of a variety of sheet molding method, two kinds of molding methods were compared, and ultimately determine extrusion Act as a molding method of the present design. After analyzing the single-screw extruder and twin screw extrusion advantages and disadvantages and features, combined with the design objectives and requirements, and ultimately decided to adopt a twin-screw extrusion PVC sheet.

The total process, reference literature, to determine the pretreatment process flow diagram of the total production and raw materials, and to be described in detail. Plastic mechanical design reference standards, each step needed to refine the process parameters and models of technical equipment and the like.

In the production process of a chapter. First, make sure the overall flow of this design, the production processes necessary briefly, given the overall production process flow diagram. Secondly, according to the production flow sequence, followed by introduction of various production processes and design. Which includes the preparation of the molding material, extrusion process and stereotypes packaging processes. It should be said, an extrusion process is the focus of this chapter, this section except for production equipment and technology are described in detail, but also by the parameters of the extrusion die head screw and a detailed selection and designed to meet the design requirements. Finally, select the screw head and die parameters to obtain the optimum operating point, provide the basis for equipment selection and choose the material balance section.