Tue Apr 11 23:33:30 CST 2023
The plastic inside the mould is gradually and evenly coated, melted and adhered to the entire surface of the mould cavity under the action of gravity and heat, and shaped into the required shape, which is made by cooling and shaping. The rotational moulding process has the following advantages compared to the traditional blow moulding and injection moulding process:
1, cost advantage: rotational molding process only requires the strength of the rack is sufficient to support the material, mold and the weight of the rack itself, in order to prevent material leakage of the closed mold force; and the material in the entire molding process, in addition to the role of natural gravity, almost no external force, thus fully equipped with the advantages of convenient processing and manufacturing of machine and mold, short cycle time, low cost.
2、Quality advantage. The products of rotomoulding process are more stable in quality and structure due to the absence of internal stress during the whole production process.
3、Flexibility and versatility. The rotomoulding process is convenient and inexpensive, so it is particularly suitable for the development of new products in multiple varieties and small batches.
4, personalised design advantages. The products in the rotomoulding process can easily change colour and can be hollow (seamless and weldless), and the surface treatment of the products can be patterned, wood, stone and metal to meet the personalised needs of consumers in modern society.
Products produced using this process include: fuel tanks, water tanks, machinery housings, fenders, etc. The main alternative objects are metal parts and fibreglass products.
Injection moulding is a process that has been developed on the basis of micro-manufacturing techniques such as LIGA, for example, but of course there are many other methods. The LIGA process involves producing a model for injection moulding, commonly known as a 'mould', then filling the mould with liquid plastic and separating it to form the final product. Some plastic toys, for example, have too many products.