Plastic mold injection molding method of rotational molding

Rotational molding, also known as rotational molding, is a processing method used to manufacture hollow seamless products of various sizes and shapes. Traditionally, it is mainly used in thermoplastic materials. In recent years, the rotomolding of thermosetting materials such as cross-linkable polyethylene has also developed rapidly. Because rotomoulding does not require higher injection pressures, higher shear rates or precise compound gauges. Therefore, the mold and the machine are relatively inexpensive, and the service life is longer. Its main advantages are: the performance/price of the machine is relatively high; the molding of complex parts does not require post-assembly; multiple products and multiple colors can be molded at the same time; the cost of the mold is low; the color and material are easy to change; the loss of scrap is low.

The basic process is simple: a powdered or liquid polymer is placed in a mold, heated while rotating around two vertical axes, and then cooled. At the beginning of the heating stage, if a powdered material is used, a porous layer is formed on the surface of the mold, and then gradually melted with the circulation process to form a homogeneous layer of uniform thickness. If a liquid material is used, it flows and is coated on the surface of the mold first, and stops flowing completely when it reaches the gel point. The mold is then transferred to the cooling work area, cooled by forced ventilation or water spray, and then placed in the work area, where the mold is opened, the completed parts are taken away, and then the next cycle is carried out. Stainless steel electrode. Xingwang plastic mold follows strict production technology, strict quality control system, the production of product quality is stable, the main production of water plastic mold, water conservancy slope protection plastic mold, rice seedling tray and other molds.