In daily life, we use as many products as cow hair, most of which will be applied to plastic products, general products, the use of more is thermoplastic, this plastic in industrial production, generally by thermoforming way, you can shape. However, in our product design, the appearance of some products needs heat resistance and corrosion resistance, and the plastics used in such products need to have good thermosetting. When designers select materials, they should take into account the molding method of the products and use the vacuum casting process.
Vacuum casting is mainly used for prototype, single piece and small batch production, and can replicate almost all the properties of the injection molding process. It is mainly used for molding two-component polyurethane (PUR) and is widely used in products of different grades, colors and hardness.
Processing cost: · Low mold cost · Moderate unit cost Typical applications: · Automotive · Consumer Electronics · Sports equipment Applicability: · Prototype, single piece and small batch production
Processing quality: · Very high surface processing quality and good secondary processing performance Related processes: · Injection molding · Reactive injection molding processing cycle: · Uncertain cycle (between 45 minutes and 4 hours, depending on the scale of the part may be up to several days)
Today, Hertz Industrial Design will introduce you to the vacuum casting process in plastic molding:
Process introduction
This is a molding method for prototype production and single piece production of thermosetting PUR. The wide variety of PUR makes the process suitable for most plastic prototype production. It is used in a variety of prototyping applications, including mobile phone casings, automotive parts, sports equipment and medical devices.
The flexible silicone mold is made directly from the mold processing. The product is then recreated by vacuum casting, with properties very similar to those of mass-produced products. Full color series available. It can be flexible and elastic like a thermoplastic elastomer (TPE), or hard like acrylonitrile-butadiene-styrene (ABS).
PUR is a thermosetting plastic composed of two components. When two ingredients are mixed in the right proportions, a polymerization reaction occurs. This is an exothermic reaction. The type of material can be adjusted to fit the volume of the casting, as very large parts must cure very slowly or they will overheat and deform. In contrast, small parts can cure quickly and without any problems.
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