Page 58 - 《橡塑技术与装备》2023年2期
P. 58
橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT
Feasibility analysis and design of injection mold structure scheme for
car outer opening handle end cover
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Xiong Lijun , Wen Genbao
(1. Hubei Hangyu Precision Technology Co. LTD., Xiangyang 441007, Hubei, China;
2. China Aviation Industry Hangyu Life-Saving Equipment Co. LTD., Xiangyang 441007, Hubei, China)
Abstract: Through the analysis of the shape elements of the handle end cover, the lateral hole elements
and groove elements of the vertical opening and closing die on the shape were found out, and the inclined
guide pillar slider core pulling mechanism was used to realize the core pulling of the vertical opening and
closing die direction hole and groove core. For the screw hole elements that are parallel to the direction of
opening and closing die, the screw insert rod is used to support the structure, and the handle end cover can
manually take out the screw insert rod after demoulding. New die steel and new heat treatment technology
are used to improve the service life of the die, and the the first mock examination with four cavities is used
to realize automatic production of large quantities of products. The latent point gate and the point gate
and the ejector rod are set at the inner cavity of the handle end cover, which realizes the requirements of
"appearance". In this way, the design process of the injection mold structure can achieve the purpose of
processing qualified handle end cover.
Key words: shape analysis; structural scheme; injection mold; shaped hole; shaped groove
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SKC 的聚氨酯保温材料首次通过韩国国家阻燃标准测试
SKC's polyurethane thermal insulation material passed the test of Korean national flame retardant standard
for the first time
由 SKC 的聚合物材料制造部门 SK pucore 生产的一种阻燃聚氨酯保温材料已获得韩国国家验证和核查机构
的批准。这是聚氨酯材料为主的绝缘产品首次在绝缘行业中通过韩国国家阻燃性能测试。
聚氨酯基本上是一种高度易燃的塑料材料。许多建筑物使用的外部装饰材料,由于其高保温性能和外观,是
可燃的。然而,由于塑料材料外墙保温板,韩国的住宅楼和多功能建筑发生了大规模火灾。2019 年 11 月,这种
易燃材料被禁止使用。
聚氨酯保温材料通常以泡沫的形式使用,在制造阶段被夹在外墙板之间,或者被喷涂在墙体和面板之间。喷
射的聚氨酯泡沫会膨胀,完全填充空隙。
SK pucore 的保温材料能够保持其阻燃性能,这要归功于多元醇的发展,多元醇是用于生产聚氨酯泡沫的一
种关键化学品。新开发的以多元醇为基础的材料具有很高的保温和阻燃性能。
韩国国土交通部将建筑材料分为三种类型 —— 阻燃、防燃和难燃材料。阻燃材料需要很长时间才能着火,而
像混凝土、黏土瓦和砖这样的防火材料则不会着火。阻燃材料是一种化学物质的复合体,极难被点燃。
SK pucore 在 12 月 19 日的一份声明中说,其与乐天工程建设公司、乐天化学公司以及两家建筑材料制造商(SY
集团和 Geun Seung Insulationtech)共同开发的聚氨酯保温材料已经通过了韩国合格性实验室进行的阻燃性能测
试。测试结果得到了国营的韩国实验室认可计划(KOLAS)的验证。
摘编自 “PUWORLD”
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