By Julio Serrano Mira
Manufacturing Process Engineering Area.
They can be used to produce parts weighing from a few milligrams to almost 100 kg. Injection moulding can produce intricate and complex shapes, the limitation is the ability to produce a mould whose cavity has the same shape as the part, and the mould must allow the part to be ejected. In applications requiring a high production rate and good dimensional control, this process is the most common for thermoplastic polymer forming.
From a design point of view, one of the main improvements provided by plastic injection moulding is the possibility of incorporating several functions into a single part, so that the number of parts and assembly time can be reduced.
We can say that the most relevant advantages of the manufacture of plastic parts by injection moulding are the following:
It is important to note that polymers have high coefficients of thermal expansion, and significant shrinkage of the plastic in the mould occurs during cooling. After injection into the mould, some thermoplastics experience shrinkage of close to 10% in volume. Therefore, the mould cavity dimensions must be larger than those specified on the part in order to compensate for this shrinkage.
From Moldblade we offer a wide range of injection moulded plastic parts such as housings, containers, lids, automotive parts, toys, household appliance parts, tools, waste bins, plastic shopping trolleys, plastic cutlery and many other items of our daily life.
13 November, 2020
Plastic injection moulding systems