此外还介绍了成型收缩率的评价方法。
成型收缩率小，尺寸稳定性好，熔体粘度小，易成型加工。
Molding shrinkage of small, good stability, melt viscosity size is small, easy forming process.
阐述了塑料成型收缩的产生原因及影响成型收缩的主要因素。
The production and its factors of the shrinkage on the plastics molding is elaborated. The influence on the main factors of the molding shrinkage is introduced.
本工作采用试验与数值模拟相结合的研究方法，对玻璃纤维增强聚丙烯系列材料的成型收缩率进行了深入研究。
Therefore, the shrinkage of the glass fiber reinforced polypropylene specimens prepared by injection was investigated with the combination of the experiments and the simulation.
研究了塑件“主特征”和“限定特征”对成型收缩的影响关系，建立了考虑塑件结构特征影响的收缩关系表达式。
Mutual relation on molding shrinkage between central character and restriction character is studied, and connection formula is established.
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.
通过模拟实验结果曲线的分析表明，塑件的结构特征及浇口位置与数量的变化，对塑件的成型收缩具有重要影响，并且有一定的规律可寻。
Structures and place and number of molding gate have effect on molding shrinkage by analyzing results of simulation experiments, and have many laws.
结果表明，制品厚度对其成型收缩的影响很大，制品厚度增大时，注射成型收缩率增大，但这种增大的趋势是非线性的，而是随着厚度的增加而逐渐减缓。
The results show that the shrinkage of injection molding part is increased with thickness of parts in non-linearity, and the increase momentum is moderated with the increase of thickness.
科学家们在观察青少年的大脑时发现，大脑在工作的时候是不断地在膨胀、生长、收缩、成型的，即便当青少年已经达到了25岁。
Scientists found that when they watched the brains of teenagers, the brains were expanding and growing and cutting back and shaping themselves, even when the kids are 25 years old.
探讨了影响注射成型厚壁塑料制品收缩变形的一些因素，提出了对实际生产有指导作用的建议。
Several factors affecting on contraction deformation of thick section injection moulding articles were investigated. Some practical proposals were given.
因此我会承担你的全部模子建筑物和注入成型是附属的收缩到另外的一个供应者？
So I would assume that all of your toolings and injection molds are subcontracted to another supplier?
根据注塑成型过程中高分子的运动特点，提出注塑成型制品的各点在收缩过程中将沿其流动路径进行收缩的观点。
On the ground of movement characteristics of macromolecules during the injection molding process, a thought is put forward that a point will shrink along its flow path.
成型过程中，树脂收缩将会导致部件比原模稍小。
Resin shrinkage during the molding process will result in a part that is smaller than the master model.
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.
焊缝成型的变化是电弧收缩与表面张力变化双重作用的结果。
The transformation of weld forming is the results of dual functions of arc shrink and surface tension change.
本文介绍了热收缩套管的收缩机理及成型方法，如气压吹胀法、机械扩张法和缠绕法等。
This article introduces the shrinking mechanism and molding process of heat-shrinkable tubes, Such as air inflation, mechanical expanding and winding etc.
在这些应用场合，不仅要求塑料制品的精度高，而且塑料制品形状也比较复杂，这使得对注塑成型制品收缩率的控制变得十分重要。
Industrial plastic parts are usually requested to have high precision and complicated shapes, so it is important to control the shrinkage rates of injection-molded parts.
得到有益于认识铸件中此类接头凝固特性和热节位置的变化规律，对工艺设计者认识和防止成型过程中产生凝固收缩缺陷是很必要的。
The results are very important to understand the solidification characters of steel castings with T conjunction and to estimate the position of the hot-spot in the castings to avoid shrinkage defects.
高压压缩了聚合物并能使更多的材料流人模腔。这样，“收缩”就减少了，生产的成型件的质量就得以提高。
The pressure compresses the polymer and allows more materials to flow into the mold. Shrinkage is reduced and better quality moldings are produced.
为成型流量计外壳内侧凹进部分，设计了收缩内抽芯模具结构。
The contractile interior core pulling mould structure was designed for the molding of the concave part of inner side of outer casing of flow meter.
采用BP神经网络建立注塑成型工艺参数与注塑制品收缩率之间的网络模型，并通过试验数据对成型工艺参数进行优化。
BP Neural Network is applied in this paper to establish the model between the process parameters and the shrinkage, and to optimize the process parameters by the test data.
简要概述了热收缩管的应用范围、成型加工原理和制造工艺过程。
The field of application, the principle of processing technology of producing heat-shrinkable tubes are discussed briefly.
注塑成型工艺参数对制品的最终残余应力和收缩有着直接的影响。
In injection molding, the residual stress and shrinkage of the product are affected by processing conditions directly.
因此，如果在大气压下向模子充料，成型件会因“收缩”而与模子的形状形成偏差。
Therefore, if molds were filled at atmospheric pressure, "shrinkage" would make the molding deviate from the SHAPE of the mold.
与现有技术相比，具有生产能力高，生产过程无断丝、收缩、扭转等现象，生产的粉芯丝材成型效果好，表面光滑等优点。
Compared with the prior art, the mechanical device has no phenomena of wire breaking, contraction, torsion, and the like and has the advantages of high production ability, good molding effect, etc.
成型坯体的干燥收缩率小于0.3%，密度分布的标准偏差为0.32%，反应烧结过程中，坯体的收缩率小于0.2%。
Theshrinkage of green body was 0.3% and the density deviation was 0.32%. After infiltrated with molten silicon, the shrinkage of sintering body had another 0.2%.
结果表明，优化工艺后成型的复杂壳体制件的残余应力明显减小，体积收缩也比较均匀，缺陷明显减轻。
The result indicated that the residual stress in the product produced by optimized project was decreased obviously, the volumetric shrinkage was homogeneous and the defect became slight.
聚合物流体的收缩流动行为是微注射成型工艺过程中影响分子取向与结构的重要因素。
Contraction flow behavior contributes significantly to the orientation and structure of molecular in micro injection molding.
根据塑料注射成型流动过程的特点，认为塑件的收缩是以浇口为收缩中心，据此分析了塑料齿轮的收缩规律，并进行了实验验证。
According to the procedure of injection molding, this paper presents a thought that the gate is the shrinking center of plastic products.
根据塑料注射成型流动过程的特点，认为塑件的收缩是以浇口为收缩中心，据此分析了塑料齿轮的收缩规律，并进行了实验验证。
According to the procedure of injection molding, this paper presents a thought that the gate is the shrinking center of plastic products.
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