Page 130 - 《橡塑技术与装备》2022年7期

橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT

Feasibility analysis of partitioned cylindrical body elements and
structural design of the injection mold

3
1
Zhang Junshen , Xiong Lijun , Wen Genbao
2
(1.Changsha Aviation Vocational and Technical College, Changsha 410007, Hunan, China;
2.Hubei Hangyu Precision Technology Co. LTD., Xiangyang 441007, Hubei, China;
3. China Aviation Industry Aerospace Lifesaving Equipment Co. LTD., Xiangyang 441007, Hubei, China)
Abstract: Through the analysis of the feasibility of dividing the partitioned cylindrical body elements, the
concave, arcuate and high "obstacle body" elements that affect the mold structure, the reinforcing ribs in
the form of bosses, the elements of the hole and the cylinder, and the coaxiality requirements were found.
There are two ways of placing the partition cylinder in the mold, vertical and horizontal, so there are two kinds
of mold structure solutions. Scheme 1 requires 2 inclined guide pillar sliding block core pulling mechanisms,
and scheme 2 requires 1 left and right inclined sliding block pipe jacking core pulling and demoulding
mechanism. Scheme 2 has a good appearance for the processing of the partition cylinder, and can ensure
the 3 requirements of the cylinders coaxiality. Scheme 2 is the best optimized mold structure scheme, and
the designed injection mold can process high-quality partition cylinders. In the design of the injection mold
structure, the feasibility analysis of the shape elements for the injection molded parts and the mold structure
scheme must be carried out. After finding the best optimized mold structure scheme, the success of the mold
structure design can be ensured.
Key words: shape analysis; "obstacle body"; appearance; mold structure scheme; core pulling
mechanism
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PPS- 聚酰胺管为电动汽车冷却液管路提供耐高温新选择
PPS-polyamide pipe provides a new option for high temperature resistance for electric vehicle coolant lines
日本公司 Polyplastics-Evonik 和 Toray 联合开发了一种三层挤压管，其中外层聚酰胺 12（PA12）和内层聚
苯硫醚树脂（PPS）用一种特殊的胶粘剂粘合在一起。这种管材能够承受 130℃ 的温度，还具有低水平的离子洗
脱到冷却水中。目标应用包括电动汽车（EVs）和工业机械的冷却液管道。
PA12 经常与聚丙烯（PP）结合使用，作为汽车冷却液管道的轻质管材的内层，但连续使用受到限制，而且
水解也是一个问题。凭借其耐热性和抗水解性，PPS 树脂解决了这些问题，但它不能与长链聚酰胺（如 PA12）
直接粘合。Polyplastics-Evonik 和 Toray 用一种全新的材料解决了这一难题，这种材料可以通过共挤来胶粘这
两种树脂。
新管材结构的耐热性提高，可以取代金属管材，而波纹管也是一种选择。此外，低水平的离子洗脱使这种管
材特别适用于电动汽车和燃料电池汽车的应用。
Toray 是世界领先的 PPS 树脂供应商，从单体到化合物都是一体化的。就其本身而言，Polyplastics-Evonik
一直在积极开发 PA12-PP 管材在汽车应用中的市场，现在通过与 Toray 的合作，有了耐高温管材的新选择。
摘编自 “PUWORLD”
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