Which of the following moulding processes is widely used for the manufacturing of plastic bottles?
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Blow moulding is a very slow process, however economical for producing products with better quality.
In extrusion blow moulding process, it is very difficult to trim away excess of plastics.
Single stage stretch blow moulding is always preferred than two stage stretch blow moulding for increase in production rate.
Single stage stretch blow moulding process is mostly used for small level production.
Thermoforming process involves injecting of molten plastic into a mould cavity by application of compressed air.
In thermoforming process, it is very difficult to control thickness of moulded parts or sheets.
In thermoforming, it is very easy to mould the plastic materials which are of crystalline nature.
Thermoforming is basically a cheap process as compared to injection and blow moulding process.
Which of the following materials is mostly used for making of thermoforming moulds?
Which of the following material is not used in extrusion?
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