First install the machinery and equipment, that is, the rotomolding mould of the finished product you want to make, then heat and melt the raw materials (polypropylene, etc.), and the melted material enters the mold and is then cold-treated and shaped, so that the finished product is produced. The rotomolding mould is opened according to the parameters such as the size and radian strength of the product design. The plastic products in daily life are produced through the production line.