Plastics conversion companies in South Africa, including plastic injection moulding companies, plastic blow mou lding companies, plastics extrusion companies and plastic rotational moulding companies in South Africa.
Find plastics manufacturing companies according to their process of plastic processing.
Plastic recycling is the process of recovering scrap or waste plastics
and reprocessing the material into useful products, sometimes completely
different from their original state.
Before recycling, plastics are sorted according to their resin identification
code. more on recycling plastics
Plastic injection moulding is a manufacturing
process for making parts from thermoplastic and thermosetting plastic
materials using plastic injection moulding machines. Molten plastic is injected at high pressure into
a mould , which is the inverse of the
product's shape. Injection moulding is widely used for manufacturing
a variety of plastic products and parts more on the injection moulding process
Plastic blow moulding is a manufacturing process by which hollow plastic products
such as bottles are formed. In general, there are three main types of
blow molding: extrusion blow moulding, injection blow moulding, and stretch
blow moulding. In extrusion blow moulding , plastic is melted and extruded into a hollow tube. more on the blow moulding process
Plastic extrusion of pipe, rod and tube , profile extrusion, sheet extrusion,
film extrusion. In the extrusion of plastics, raw thermoplastic
material in the form of small beads is gravity fed from a top mounted
hopper into the barrel of the extruder. The rotating screw forces the plastic pellets forward into the barrel which is heated to the desired melt temperature more on the plastic extrusion process
The rotational molding process is a high-temperature, low-pressure plastic-forming
process that uses heat and biaxial rotation (i.e. rotation on two axes)
to produce hollow, one-piece parts. The rotomoulding process does have
distinct advantages. Manufacturing large, hollow parts such as oil tanks
is much easier by rotational moulding than any other method.
Manufacturers of products using for engineering plastics. For example ABS is used to manufacture car bumpers, dashboard trim and Lego bricks, polycarbonate is used in motorcycle helmets and polyamides (nylons) are used for skis and ski boots. Typically, an engineering plastic is chosen for its range of enhanced physical properties.
Calendering is a finishing process applied to textiles and plastic. During calendering rolls of the material are passed between several pairs of heated rollers, to give a shiny surface. Extruded PVC sheeting is produced in this manner as well other plastics. more about calendering process
Thermoforming - vacuumforming is a manufacturing process where a plastic sheet is heated to a pliable forming temperature, formed to a specific shape in a mould, and trimmed to create a usable product. The plastic sheet (or plastic film when referring to thinner gauges and certain material types) is heated so that it can be stretched into a finished plastic product. The vacuum forming process can be used to make most product packaging.