介绍了基于快速成型技术的快速铸造金属模具的工艺流程和影响模具尺寸精度的主要误差因素。
The process flow of rapid casting technology based on RP for metal molds and main error factors influencing mold's dimensional precision were introduced.
采用一般的平均收缩率方法来确定模具型腔的成型尺寸，已难以满足精密注塑成型制品的精度要求。
Using average shrinkage rates of injection-molded parts to decide the dimension of mold cavity can not satisfy the demand of high precision injection-molded parts.
对于非椭圆截面曲臂的大型曲轴，其模具结构设计对曲轴成形后的形状尺寸精度影响极大。
The design of die structure has much influence on shape dimension and precision of the formed crank-arm with a non elliptical section.
采用特种砂v法铸造工艺获得了良好表面精度和尺寸精度的铸造模具。
The fine surface quality and dimensional accuracy cast hot work die was obtained by special sand V method casting technique.
塑料的成型收缩率直接关系到制品的形状和尺寸精度，因此在塑料注射成型的模具设计中，迫切需要预测制品的成型收缩率。
The shrinkage of plastic products is a very important parameter and need to be forecast during the design of injection molds, which affects the shape and size precision of the products.
塑料模具成型尺寸的准确设计和计算，直接关系到塑料件的精度。
Precision of the plastic production directly relies on the precise design and calculation of the moulding dimensions.
实践证明，该挤出成型模具结构设计合理、简单，易于加工，成型的异型材满足尺寸精度要求。
The practice proves that the mold has reasonable and simple structure and operates easily, the profiles processed with this mold can meet the precision requirement.
介绍了东风汽车车轮有限公司为开展滚型车轮生产线建设而进行的车轮轮辋滚型工艺的工序设计与模具设计，生产出的轮辋尺寸精度高，圆角减薄量小。
This paper introduces the roll forming process and mould design of wheel rim. The rim manufactured with the dies has higher dimensions precision, less reducing thickness.
随着锻件尺寸和精度的提高，需要更大吨位的成形设备和非常昂贵的、高精度的模具。
This means that as long as increase in size and precision, larger tonnage of forming equipment, very expensive and high precision dies would be required.
选用两阶段成形工艺和合理的模具结构，制备出了具有良好尺寸精度和表面粗糙度的精密齿轮。
The fine spur gear with good size-precision and surface-roughness is obtained through two-stage hole-forming process scheme and reasonable die structure design.
本模具是一个辊筒的注塑模具，制件尺寸较大、形状较为复杂，硬度高，但精度要求不高。
This is a injection mould to produce roller. the roller is big , complicated and the rigidity high , but the accuracy is not request high .
结果表明，在旧预成型模具的基础上改进的新型模具能精确控制预成型压力，从而可以保证预成型体的尺寸精度和质量。
The results showed that the new perform mold made from the old mold could control the pressure of the perform, so that the perform could have exact dimension and good quality.
结果表明，在旧预成型模具的基础上改进的新型模具能精确控制预成型压力，从而可以保证预成型体的尺寸精度和质量。
The results showed that the new perform mold made from the old mold could control the pressure of the perform, so that the perform could have exact dimension and good quality.
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