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如何做好木塑注塑应从以下几方面着手
1, 树脂的选择:树脂必须是复合注塑用的熔融流动指数如PP应在13-18左右,PE在9左右,ABS在6以上。
1. Resin selection: Resin must be melt flow index for composite injection moulding, such as PP should be around 13-18, PE around 9, ABS above 6.
2, 树脂最好选高抗冲的,这样制品的冲击强度好。
2. Resin should be chosen with high impact resistance, so that the impact strength of the product is good.
3, 纤维的处理和添加量的大小会严重影响物料的流动性和制品的力学性能,南京塑泰高分子的马来酸酐接枝聚丙烯ST-5及马来酸酐接枝聚乙烯ST-6在纤维处理上有良好的应用。
3. The fluidity of materials and mechanical properties of products will be seriously affected by the treatment of fibers and the amount of fibers added. Maleic anhydride grafted polypropylene ST-5 and maleic anhydride grafted polyethylene ST-6 of Nanjing Plastic Thai Polymer have good applications in the treatment of fibers.
4, 物料的含水率由树脂,纤维,无机物的含水率,生产工艺(混料,造粒),物料的储存,注塑时的工艺等决定。
4. The moisture content of materials is determined by the moisture content of resins, fibers and inorganic substances, production process (mixing, granulation), storage of materials, and injection process.
5, 物料的分解与纤维,无机物的添加量,粒料的流动性,注塑工艺,产品的大小等有关。
5. Material decomposition is related to fibers, inorganic additions, particle fluidity, injection molding process, product size and so on.
6, 木塑注塑厚制品由于生产时产生的水汽不能像挤出一样通过螺杆排气孔排气,严重影响制品的密实度和收缩,可以采用中空吹气法生产,这样既可解决以上问题又可减轻制品重量和提高制品力学性能。
6. The water vapor produced during the production of wood-plastic injection-moulded thick products can not be exhausted through screw exhaust holes like extrusion, which seriously affects the compactness and shrinkage of the products. It can be produced by hollow blowing method, which can not only solve the above problems, but also reduce the weight of the products and improve the mechanical properties of the products.
7, 对于大而厚制品,模具采用热流道设计较好。
7. For large and thick products, hot runner design is better.
8, 对于力学性能要求高的制品如一次性注塑成型椅子,要加玻纤和不同树脂据比例共混来生产。
8. For products with high mechanical properties, such as one-time injection moulding chairs, glass fibers and different resins should be blended to produce.
9, 润滑剂的好坏是保证产品成型和控制物料不分解的关键。
9. The quality of lubricant is the key to ensure product forming and control material decomposition.

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