- 上一篇：双β-氨基酯的绿色合成研究
- 下一篇：皮革用香精胶囊的制备
在能量换算的内容里，通过挤出成型机和模具部分能量衡算的计算，通过对热能的计算得到冷却水用量，并通过计算得出相应的电能与化学能。在了解本设计设计产品的用量的同时，也为最后的经济衡算做了大量的准备工作
在车间非工艺设计一章中，首先了解了车间布置的准则，对车间的大致情况进行设计，然后再布置了车间设备的安置并绘制了车间布置图，此外还对车间人员的人数及其岗位进行了简要的安排。同时，也考虑了车间安全环保方面的问题，对其给水，排水做了规划，并对三废的处理进行了探讨。
最后进入了经济衡算的章节，对原料消耗、设备折旧费、包装费、水电费及人员薪资并综合考虑其他因素，对本设计的成本进行了估算并制定产品的价格，最后与市场同类型产品进行对比，从而判断本设计的可行性与否。
The information of general design
The graduation project topic is 3,000 tons of short glass fiber reinforced polypropylene, polyethylene sheet plant process design. This is based on the short glass fiber by polypropylene enhanced, making it apply to a wider range of fields such as the automotive industry, the aerospace industry and so on. Based on the use of factors conditions, processing conditions and other considerations, the specification sheet for the processing of thick * width * length = 15mm×1500mm×3000mm, made of PP and the color is white.
The design of the design ideas from the first open question introduction and understanding through the introduction of various materials to determine the best formulation resulting in a more economical and environmentally friendly products better. Then determine the sheet production process, the selection of the best programs in the feasibility of molding process - Extrusion and extrusion equipment into the design and calculation of parameters of each component to determine the equipment selection, and finally calculate the material balance, energy workshop process to non-accounting, economic accounting and plant layout, each of the design elements fully developed.
In the introduction, from small to large angle to proceed, starting with thermoplastic composites drawn short glass fiber reinforced pp material, and its market prospects, applications do a survey. In addition, the characteristics of polypropylene to do the analysis, the design continues to expand it to take advantage of improving its shortcomings, the recipe for the subsequent processing to do the groundwork. At the same time, the chapter clearly the purpose and significance of this design, and design specifications, and design issues to be addressed were considered.
Next is to design the formulation. First elaborated the role of each component in the formulation and presentation of the various components commonly used raw materials. According to the characteristics of polypropylene, by adding additives which make up the deficiency of polypropylene, various additives include formulations are compared to select the better formula. In the process of selecting the components, in order to meet the physical and chemical properties of the plate, we should take the interaction of the components of the formulation into account, whether the material is more easily accessible, whether reasonable price and other factors and so forth. Next, choose the best one. Finally, make a list of all these components.
The chapter is to choose a proper molding process. Describes the short glass fiber reinforced PP sheet molding method commonly used. Usually, there are three choice, compared with injection molding, thermoforming and extrusion molding method and finally determine the extrusion molding method as a molding method of the present design. In the second part, we focus on the extrusion process works and its characteristics. Contrast twin screw and single screw production advantages and disadvantages as well as the characteristics, combined with the design objectives and requirements, and ultimately decided to use parallel twin-screw extrusion production of short glass fiber reinforced PP sheet.