摘要:核桃在我国24 个省（区）都有栽培，其种植面积和产量均居世界首位。目前，我国核桃栽培面积已达到150万公顷，核桃年产量达50 万吨。核桃是我国的传统出口产品，是国际市场的主要竞争力产品之一。据测定，刚采收后的核桃青皮含水率为40%～50%， 如此高的水分含量很容易使核桃采收后腐烂变质，所以应尽快脱掉坚果外面的青皮，以保持坚果面洁净，增加商品外观品质，提高核桃的附加值。与手工剥离青皮相比较，机械剥离青皮可提高工效20 倍以上。
并且可以避免青皮对手的损伤。与直接运输青皮核桃相比，脱皮后的核桃不但节约运输成本，而且还增加运输的数量，对农户和商户来说都能够增加收益。因此，加强对青核桃脱皮机械的开发研究，不仅可以提高农户和商户的经济收入，而且能够有效处理固体废弃物，变废为宝。
核桃青果皮的剥离是核桃收获后加工的一项重要工序，它对保证商品核桃的品质有重要的作用。核桃果实主要由外层青果皮、内层硬果壳和种仁3部分组成。当青果皮成熟而表面出现裂纹时，核桃坚果与青果皮容易分离而剥离。但是由于青果皮和种仁成熟时间不一致。在高温干燥地区种仁先于青果皮成熟，待外层青果皮成熟，容易剥离下来时，种仁已到了过熟阶段，此时收获的核桃种仁色泽较深，从而降低了核桃的商品品质。
关键字：核桃；青皮；破损；剥离
ABSTRACT：Mold is a technology-intensive product, capital-intensive industries in China’s national economy, the position are very important. Mould industry has been China formally identified as fundamental industry, known as "the mother of industrial". 75% of rough machining industry product parts, 50% of the machining parts by molds and most plastic products also by molds. So I chose Chargers Case mold design as the graduation design topic, the following is design of the main content:
(1) Introduced the plastic mould development status and development trend of plastic mold, expounds the modern social economic development is the indispensable and mould manufacturing technology level of measure of a national product products is one of the important signs of horizontal discretion.
(2) Shows the 3D modeling graphics molded parts; analyzes the technology of plastic parts, mainly is determined according to the plastics materials for shrinkage and draft, molded parts structure analysis identified wall thickness and precision.
(3) Introduced the design injection molding process conditions; Make casting 3d drawing using UG modeling software model analysis function of the plastic parts, through the analysis of the quality attributes the quality of plastic parts XS attribute preliminary chose injection, which ZY/500 - injection molding machine introduces specification and performance.
(4) Mainly introduces the design of die structure. First to mold cavity number scheme of the argument, arranged form, classification and determine the; Secondly the detailed introduces the design of gating system, including the mainstream way, the design of shunt way spruce, then to exhaust institutions, cold material feeding stem hole and pull the design of the size of the parts, detailed calculated; At last, the paper introduces the launch institutions and temperature control system design, here, meet new design institutions is an important question: because of special shape, not directly cup, so increased profile remolding parting institutions, thus adding to the core-pulling distance and stripping force etc calculation and design, the meanest is oblique guide column, the design and calculating, this also is the design of a difficulty.
(5) Is some parameters for injection checking and standard formwork choice, here was checked injection quantity biggest, clamping force, open mold trip. Finally some parts of chart and equipment for drawing.
Finally this design is summarized. Mainly to the design process, and the design review innovative and deficiencies summary.
Keywords：Chargers Case; Injection mold; Side parting
