Rotational molding is also known as spin molding, rotational molding, rotational molding, rotary molding, and the like. There are many kinds of plastic processing methods. In addition to our common injection molding, blow molding, extrusion molding and other processes, rotary molding (rotary molding) is also an important processing method for plastic products or steel-plastic composite products, especially in hollow molding. In terms of rotomolding, it has outstanding advantages.
The four major problems in the domestic rotomolding plastic storage tank industry:
(1) The number of equipment in rotomolding production enterprises is small, the production scale is small, and the intensification of upstream and downstream products is low.
(2) Lack of research and development capabilities, lack of its own core technology, including process technology, equipment and mold manufacturing technology, engineering design capabilities and product application development technology.
(3) The categories are not fine enough, the added value is low, and the market competitiveness is poor.
(4) Lack of reliable and high-quality domestic raw materials, most of which still rely on imports.
The rotomolding process firstly adds the plastic raw material into the mold as a powder, then continuously rotates the mold (three-dimensional motion) and heats the mold. At this time, the plastic raw material in the mold is gradually and uniformly melt-coated under the action of gravity and heat. On the entire surface of the cavity, the cooled plastic article or the steel-plastic composite article is then a rotomoulded article.
The development direction of domestic rotomolding plastic storage tank industry:
(1) The scale of rotomolding production enterprises continues to expand.
(2) Through the adjustment of the product structure of rotomolded products, the variety of rotomolded products is increasing, the technological content of rotomolded products is continuously provided, and rotomolding products will develop in the direction of high performance and high added value.
(3) Increase research on related processes, equipment and molds to form their own core technologies.
(4) Strengthen the development of domestic rotomolding materials and establish a raw material R&D center to completely change the current situation that plastic raw materials mainly rely on imports.
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