Shanghai Daoqin Plastics Co., Ltd.

         formed analysis

         in rotational molding processing process in easy processing thick products, products 平均壁 thick 取决于投 material amount how much, its uniform property and mold structure, rotational molding molding process has 关.

         from rotational molding product and rotational molding mold structure 说, generally in rotational molding products inner 凹 转角处(mold outer 凸) thick degree relatively small, products outer 凸 转角部位(mold inner 凹) thick degree relatively large, if products outer 凸部位角 degree small, easy material material can mold belt/tape versus 应 孔洞 and other defect, therefore products has 尖角部位, commonly used large slip 圆弧 渡.

         plastics melt and viscous can force main/primary and mold temperature degree has 关. mold temperature degree high 方, plastics relatively easy melt mold 转动层层 coating, viscous resin relatively more, temperature degree low viscous resin versus for relatively less, formed products thick 不均.

         products thick also and speed degree has 关. speed degree non-uniform, easy formed thick 不均, but also random property, therefore generally using/adopting can control 恒扭矩 or speed electrical machine 保征主副轴匀 speed 旋转. products certain 处部位 and its it 部位壁 thick relatively large, mold can 修改时, process degree solutions.

         solutions

         rotational molding mold solid in upper 适当 位置, adjustment balanced.

        主, 副轴旋转 speed degree maintain ratio/proportion 均衡, speed degree uniform.

         add hot can ensure in direction upper make mold hot uniform.

         add hot and cooling process in toward one-time, toward need speed, generally positive 转, time same.

         in need products thick degree increase large 部位, mold versus separation need preheating or decrease small thermal insulation factors effect/influence.

         in need products thick degree decrease small 部位, mold versus 应部位 upper add fluorine ethylene sheet/plate or 石棉垫 thermal insulation, make melt material material easy mold or 持续堆积, decrease small 此部位 thick degree. methods also use thermal insulation in mold upper, make its inner surface method viscous resin, obtain 开口部位, this type of methods made generally is 规整.