Blow molding technology?

Update:25-01-2021
Summary:

 I think from the literary sense of blow molding, the i […]

 I think from the literary sense of blow molding, the idea that air or this kind of air flow will be used in this kind of industrial process. Generally speaking, blow molding (also called blow molding) is a manufacturing process by which hollow plastic parts are formed. The usual process begins by melting plastic and forming it into a parison, which is a tubular plastic bottle machine with a hole at one end. Then pressurized gas (usually air) is used to expand the hot parison and press it on the cavity until the plastic cools. Now it's time to open the mold and the part has been made. In fact, it is very popular in industrial production. Or it can be said that blow molding is a multi-billion dollar business. According to statistics, in the late 1980s, the global annual consumption of the term was about 10 billion pounds. With the development of new technologies and the expansion of application fields, the demand for blow molded products continues to grow. There is no doubt that the global market for this term is still large.

It is widely used in various industrial or technical applications, such as toy wheels, car seat backs, piping systems, surfboards, bellows, fuel tanks, flower pots, car bumpers, double-wall tool boxes and cabinet panels, etc. . Generally, there are three main types: extrusion, injection and stretch blow molding. Now, some details of each type are provided below. Considering the first type, the control of wall distribution is the core. Programming and mold forming are two common techniques used to support wall distribution control. In the extrusion process, it is important to make the wall thickness in the mold reach the appropriate size. Regarding injection blow molding, it is usually used for mass production of hollow glass and plastic objects. It involves injecting the thermoplastic material into the parison and then transferring the core rod to the blow mold. In fact, the equipment machine is based on the extruder barrel and screw assembly of molten polymer. For the last type, it is common in the commercial introduction of containers such as cans and bottles. This is a method of producing a plastic container from a parison. When the parison is blown into the required container shape, the parison is stretched in both the hoop and axial directions. It is popular because of its low tool and mold cost, fast production speed, improved material tensile strength, barrier performance and transparency, and weight reduction advantages of stretch blow molding, so that it can be produced with less raw materials An economical and bottled container.