What are the recent trends in the use of rotomolding moulds?

Simultaneous heating and rotation of the rotomolding mould distributes and fuses the resin on the inner surface of the mould. The result is a product that consists of seamless parts with uniform wall thickness and more material in the corners to absorb the shocks and stresses that are most prone to occur.

• What is the material of rotomolding mould?

• What are the recent trends in the use of rotomolding moulds?

• Why do we choose to use rotomolding mould?

What is the material of rotomolding mould?

rotomolding mould is made from welded steel sheet or casting. Manufacturing methods are often influenced by part size and complexity; most complex parts are likely made with cast tooling. Molds are usually made of stainless steel or aluminum. Aluminum molds are usually much thicker than equivalent steel molds because it is a softer metal. This thickness does not have much effect on cycle time because aluminum has many times the thermal conductivity of steel.

What are the recent trends in the use of rotomolding moulds?

Until recently, the process relied heavily on trial and error and operator experience to determine when a part should be removed from the oven and when it should be cool enough to remove from the mold. Technology has improved in recent years to monitor air temperature in rotomolding moulds and take much of the guesswork out of the process.

Much of the current research is focused on reducing cycle times and improving part quality. The most promising area is die pressurization. It is known that applying a small amount of pressure to the inside of the mold at the right point in the heating phase accelerates the coalescence of the polymer particles during the melting process, producing a part with fewer bubbles in a shorter time than at atmospheric pressure. This pressure delays the separation of the part from the wall of the rotomolding mould due to the shrinkage during the cooling phase, thus contributing to the cooling of the part. The main disadvantage of this is the danger to the operator of an explosion of pressurized parts. This has prevented rotomolding manufacturers from adopting rotomolding mould pressure on a large scale.

Why do we choose to use rotomolding mould?

insert

Metal or threaded inserts are easy to add to rotational molding processes and provide a low-cost, durable and stable way to replace assembly techniques.

color part

rotomolding mould offers internal colour mixes to match almost anything imaginable without high volume requirements. Marble, sandstone and other special colors are also available.

graphics in molds

Experienced in rotomolding moulding techniques to permanently mould detailed graphics into your plastic products. Items such as multi-colored logos, serial numbers and even barcodes are seamlessly molded into the part with significantly better quality than traditional labels.

surface treatment

From high gloss finishes to detailed textures and wood grains, rotomolding is a casting process that replicates any texture in a mold.

Over 15 years experience, our two factories focus on manufacture various kind of rotomolding machines like shuttle, carrousel, rock and roll machine, as well as rotational moulds and products.