A plastic forming machine, or plastic molding machine, is developed on the basis of rubber machinery and metal die-casting machine. Since the polymer injection molding process and molding equipment in the 1870s, as an industry, plastic forming machines were rapidly developed until the 1930s, with the gradual commercialization of plastic molding equipment, injection molding and extrusion molding became the most common industrialized processing methods. Blow molding is the third-largest plastic molding method after the injection molding and extrusion blow molding method, it is also the fastest development of plastic molding method.
Forming the parison firstly, with compressed air (and tensile rod) to the radial Inflation (axial stretch) type blank, to make it close to (stretch) the blow molding cavity, then the cavity shape and size are given to the plastic products and make it cool.
Types of plastic forming machine
Plastic injection molding machine is called usually injection molding machine for short,using the injection and molding method. Plastic injection molding of thermoplastics and thermosetting plastics made from a variety of plastic products molding equipment.
To plastic extrusion machine, plastic extruder is usually called the host, and its follow-up equipments are called the plastic auxiliary equipments. With about 100 years of development, plastic extruder derived from single screw to twin-screw, multi screw or no screw and other models. Plastic extruder (the host) can match with the pipe, film, holding materials, monofilament, flat, packing tape, crowded network, plate (sheet) material, profile, granulation, cable coating and other kinds of plastic molding auxiliary equipment, composed of a variety of plastic extrusion production lines, to produce various plastic products. Therefore, either now or in the future, plastic extrusion machine are used widely in plastics processing industry.
Plastic blow molding machine is also called blow molding machine for short. The process of blow molding has two basic steps.