Page 28 - 《橡塑技术与装备》2021年16期（8月下半月塑料）

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

Pressing technology and mold design
—— Part II Plastic injection molding
Lecture 10 Calculation of injection molding pressure and selection of
equipment

Hong Shenzhang
(Shanghai Jiaotong University of Plastic Forming Technology and Equipment Institute, Shanghai 200030, China)
Abstract: Compression and injection molding use different types of plastics, the former using thermosetting
plastics, the latter using thermoplastic plastics. Compression molding technology and mold design is
a developing comprehensive science. It not only improves with the improvement of polymer synthesis
technology, the renewal of molding equipment and the maturity of molding technology, but also with the
development of computer technology, rapid molding technology, numerical simulation technology, digital
application technology, intelligent technology, etc. The main contents of this lecture include: compressing
molding technology and classification, compressing molding parts design, compressing mold structure design
and parts design, compressing molding equipment, quality control and defect analysis of compressing
molded parts, application examples of compressing molds, principle and process of injection-compression
molding, structure design of injection-compression mold, calculation of injection-compression molding
pressure, selection of injection-compression molding equipment, quality and defect analysis of injection-
compression molded parts, application examples of injection-compression molds.
Key words: design and forming of compression molded part; compression molding technology and mold
structure design; compressing molding equipment; quality and defect of compressing molded part; selection
of injection-compression molding technology and equipment; structure design of injection-compression mold;
quality and defect analysis of injection-compression molded part
（未完待续）

(R-03)

Avient 推出全新长纤维增强尼龙 6 和 6/6 复合材料，防潮且外观更好
Avient launches new long-fiber reinforced nylon 6 and 6/6 composite materials, which are moisture-proof and look better

2021 年 7 月 12 日，Avient 宣布推出一系列新的基于尼龙的 Complēt™ 长纤维增强热塑性复合材料，具有更
强的防潮性和光滑的表面美感。这些配方中的尼龙 6 和 6/6 具有延迟吸湿性，这延长了它们在潮湿环境中结构性
能的有效性。
这些新材料还希望针对解决长纤维增强聚酰胺的不一致的表面外观问题。这些问题在过去影响了人们对质量
的看法。长玻璃纤维增强的 Complēt 防潮尼龙材料的表面光滑，几乎没有可见的纤维，使其适用于广泛的消费应用。
Complēt 防潮尼龙 6 和 6/6 牌号在全球范围内有多种纤维负荷水平（重量百分比），使用长玻璃纤维、长碳纤
维或混合组合。这使得这些材料在暴露于湿气时，能够保持介于标准尼龙和特种尼龙之间的结构特性。因此，在
遇到不同气候或间歇性接触水的汽车和动力运动应用中，这些材料是金属替代和轻量化的理想选择。
Avient 公司长纤维技术总经理 Eric Wollan 说： “ 制造商想通过限制尼龙 6 或 6/6 的吸湿性来平息对性能的
担忧，唯一的选择是吸湿性较差、成本较高的特种尼龙。Avient 的新系列长纤维增强防潮尼龙经过改良，吸湿速
度更慢。这大大延长了零件在潮湿环境中或短期浸水时的结构能力的有效性，但价格更经济。”

此外，Complēt 尼龙牌号为需要高尺寸稳定性的应用提供较低的收缩率。而且它们可以作为一种材料解决方
案，以应对冷却不均造成的翘曲变形。
摘编自 “PUWORLD”

(R-03)
·8· 第 47 卷 第 16 期