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What are the requirements for the design and manufacture of rotational molding dies?

Rotational molding is a branch of plastic processing industry. Therefore, rotational molding mold is also a kind of plastic mold. The basic requirements of plastic mold design and manufacturing are also applicable to rotational molding mold. At the same time, due to some characteristics of rotational molding process, there are still many differences in the design and manufacture of rotational molding die compared with other plastic processing methods. Whether the design and manufacture of a pair of rotational mold is successful depends not only on whether it meets the design and manufacture requirements of plastic mold, but also on whether it meets the following design and manufacture requirements of rotational mold.

Discussion on the process of float tank rotational molding

Material of floating tank: environmental protection PE material, which should have good anti-collision performance, so LLDPE and HDPE materials can be used, depending on the needs of customers.Floating box filler: EPS foam plastic, foam density 18kg/m3, see the size of the product.

The function of jacketing machine in the forming process of rotational molding products

Jacketed roll molding machines are mainly used to form large and extra large plastic parts. This kind of equipment uses jacketed roll molding molds. Its feeding, demoulding, heating and cooling are carried out in the same station, and its floor area is small. The heating and cooling of the mold of the jacket roll molding machine depends on pumping hot oil and cold oil into the jacket. It has high thermal efficiency and accurate temperature control. It is especially suitable for forming thick wall parts. Its disadvantage is that the equipment and mold are complex, difficult to process and expensive. The jacket type rotational molding machine is cooled by pumping cold liquid heat transfer medium (cold oil) and circulating through the jacket type.

The rotational molding die is not easy to deform and deflect

Mold of rotary molding products the mold used for rotary molding is a single wall closed mold, which gives the outline of the product, but the internal outline of the product cannot be accurate to the details. Ordinary carbon steel plate is generally selected as the molding material of rotary mold. The cost of welding die is relatively low, especially suitable for large rotary plastic products. The rotary molding process has the following basic requirements for its mold:

How to solve the uneven wall thickness in the processing of rotational plastic products

In fact, plastic products with sudden change of wall thickness are not easy to be processed in the process of rotational molding. The average wall thickness of products mainly depends on the amount of feeding, and its uniformity is greatly related to the structure of the mold itself and the rotational molding process. If the uneven wall thickness occurs in the process of rotational molding, it is very likely that there are problems in structure, temperature and speed.
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