By injection molding produces more than a third of the total volume of products made of polymeric materials. Due to the high productivity and the relatively high costs of equipment primarily used in high-volume and mass production of plastic products. Raw materials for casting is granules thermoplastic elastomers and thermoplastics, thermosetting powders, with a wide range of mechanical and physical properties. Thermoplastic materials retain the ability for recycling after molding, and thermoset processing undergo irreversible chemical changes that lead to the formation of neplavkogo and insoluble material.
During casting specially prepared material comes in screw machines where the zone is melted, and then under high pressure is injected into the mould through injection channels, filling her mouth with a high speed and then cooling down is the casting. Crystallization of the material occurs first at the cold walls of the cavity, and then extends deep into the casting body.