Plastic Moulding Processes

Plastic Mouldings Limited is part of the Plastic Industries Group. This includes the Dip Moulding Division which manufactures flexible and semi-rigid PVC, natural rubber mouldings, cast mouldings and slush mouldings for a wide range of industrial and domestic markets. 

Dip Moulding

Dip Moulding utilises varying processes with the starting process having the required mould mounted onto a plate or frame and pre-heated in an oven to a required temperature. Once heated, the frame is transferred to a dip tank containing liquid plastisol/vinyl. The dip tank is where the mould gains the required uniformity and thickness of the finished product using the pre determined dipping time and speed for this process. The next process is to remove the frame from the dip tank and place the frame, containing the product into another oven to be cured which creates the required bond to strengthen the product. The frame is then taken out and cooled in cold water to enable the moulded product to be removed from the frame using a manual or compressed air method.    

Rotational Moulding

Rotational Moulding is used for creating hollow plastic items. This is achieved by heating a mould which is placed on a rotating axis and filled with material. Once completely rotated, the material fills all parts of the mould which is then cooled until hardened to form a particular product or part.

Slush Moulding

The Slush Moulding  process is used for the production of flexible and semi-rigid mouldings where a detailed surface finish is required on the outside of the moulding. This process is closely related to Dip Moulding.  

Vacuum Forming

Vacuum Forming is used to make many different products using thermoplastic sheets. These include enclosures, packaging, helmets and baths. The sheet is heated to make it flexible enough to be formed over a mould and then cooled to become hard again.

Neoprene

Neoprene production involves heating, pressing and cutting sheets that contain various agents to a plastic base.