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The blow molding process. Blow molding (or moulding) is a manufacturing process for forming hollow plastic parts. It is also used for forming glass bottles or other hollow shapes. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding.
Plastic forming machines, or plastic molding machines, were developed on the basis of rubber machinery and metal die-casting machines. After the inception of the polymer injection molding process in the 1870s, plastic-forming machines were rapidly developed up until the 1930s.
Rotary wheel blow molding systems are used for the high-output production of a wide variety of plastic extrusion blow molded articles. Containers may be produced from small, single serve bottles to large containers up to 20-30 liters in volume - but wheel machines are often sized for the volume and dimensional demands of a specific container, and are typically dedicated to a narrow range of ...
A mold or mould is a hollowed-out block that is filled with a liquid or pliable material such as plastic, glass, metal, or ceramic raw material. [2] The liquid hardens or sets inside the mold, adopting its shape. A mold is a counterpart to a cast. The very common bi-valve molding process uses two molds, one for each half of the object.
Rotational molding machines are made in a wide range of sizes. They normally consist of molds, an oven, a cooling chamber, and mold spindles. The spindles are mounted on a rotating axis, which provides a uniform coating of the plastic inside each mold. [5] Molds (or tooling) are either fabricated from welded sheet steel or cast.
Injection moulding (U.S. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould, or mold. Injection moulding can be performed with a host of materials mainly including metals (for which the process is called die-casting ), glasses , elastomers , confections , and most commonly ...
It specialises in manufacturing blow-moulding for production of PET bottles, plus fillers, labellers, pasteurisers, bottle and crate washer, packers, craters, and palletizers machines. The company has 50 offices and 5,487 employees, nine research centres and over 40,000 machines installed in more than 190 countries (2018). [1]
The BFS process functions similarly to conventional extrusion blow molding, and takes place within a BFS machine. [6] First, a plastic polymer resin is heated to >160 °C and compressed to 35 MPa, [11] [15] allowing it to be extruded in tubular form, [1] and be taken over by an open two-part [16] mold to form the container. Then, the mold ...