Plastic injection molds for PVC

Plastic injection molds for PVC
28 de November de 2011 Sofía Sánchez

Injection molds for PVC are an easy and simple solution for a multitude of applications. Plastic injection molding is basically the process of forcing molten plastic into a mold cavity. Once the part has cooled, the part can be ejected. This process is used in the production of high consumption parts and usually after prototyping.


Injection molding is generally used in the manufacture of parts that have to be made with a high manufacturing speed. Such as plastic chairs, fruit and vegetable boxes, printer parts, refrigerator parts, automobile parts as well as a multitude of parts that we can see in our daily lives.

In the case of PVC (third most used thermoplastic after Polyethylene and Polypropylene), the vast majority of PVC injected articles are used in construction (pipe fittings: elbows, derivations, sleeves,…) as well as in suitcases, sports and camping articles, automotive, etc.



PVC is a thermoplastic of low density, high rigidity and resistant to X-rays. It is also very low permeable to water and resistant to high temperatures (< 135°C) and shocks.

Injection molds for PVC require stainless steel (usually DIN 1.2316 or DIN 1.2083) if we want to have a long mold life. This type of molds have a higher level of maintenance than molds used in the processing of other raw materials.

For the correct manufacture of this type of parts, it is essential that the PVC injection machine has a special and suitable plasticizing group.

Mold set-up as well as the ideal adjustment of the injection parameters necessary for the use of this type of molds are essential to obtain high quality parts.

Ensuring these premises is fundamental for the satisfactory development of any PVC injection mold project.


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