Injection molding of polymers is a process very suitable for the mass production of special parts. With injection molding, you will get a high quality molding service or design, manufacture and customization of molds for any industrial application.
Polymer molding is a process for shaping thermoplastic, thermoformable and metallic materials which is carried out by injection: the plastic material is softened by heat and then inserted into a mold to cool.
These plastic materials are the most common in the production of moulds, since they are very versatile and can be combined with many polymers with specific mechanical properties.
Most Rotomolding companies specializes in the molding of any polymer, and Injection molding helps them manufacture in high precision and multi-cavity parts for different application sectors.
What is Polymer Injection Molding?
In the specific, the molding of polymers is a process which consists in injecting the material into a mould, and involves various stages of manufacture.
That’s to say:
- This process is started by closing the mold with a press and manually or automatically adding inserts, if the part to be molded requires it.
- The plastic material is then extruded, so small granules are melted by an endless screw.
- The molding is put in place, by injecting the molten plastic into the mold.
- They wait for it to cool so that it is sufficiently solid, and then we extract it mechanically or with compressed air.
Depending on their structure, these polymers can be:
- Amorphous, that is, they are transparent and suitable for any application in the manufacture of precision parts, since they possess high dimensional stability.
- Semi-crystalline, which, on the other hand, are opaque and endowed with great ductility and good chemical inertness?
The molding of polymers is also widely used, especially on the basis of their resistance to heat. In this regard, another distinction must be made, between standard polymers, which resist temperatures of less than 100ºC; and techno polymers, which can maintain their mechanical characteristics even at temperatures between 100 and 150°C.
The polymers involved in molding
Rotomolding is engaged in the manufacture of molds and in the molding of several plastic materials, according to the requirements of any customer.
Here you find a complete list of all the polymers that are being processed in injection molding:
- PCPolycarbonate
- PS Polystyrene
- PP Polypropylene
- PE Polyethylene HDPE and LDPE
- PPS Technopolymer phenylene polysulfide
- PA Polyamide (Nylon) 6 or 66 and variants
- POM Acetyl Resin
- ABS Copolymer
- PPO Polyphenylene
- PEEK Polyetheretherketone
- IXSEF Polyamide
- PMMA Methacrylate
- EPDM Elastomer
- PSU Polysulfone
- PC / ABS technopolymer
- PTFE Polytetrafluoroethylene – Teflon
The customization service also allows to mold other types of polymers, in different and specific sizes, geometries and characteristics.
Polymer molding service at Rotational molding
The idea of rotational molding was born as a mold manufacturing company, but over the years we have decided to expand our service and also offer the molding of all polymers, introducing a state-of-the-art machine park.
It is thus, thanks to our presses, that we can now also guarantee the design and manufacture of specific molds, even made to measure, to meet all the needs of our customers.
Among other services, Rotational molding:
Performs a preliminary design study to improve the moldability of parts and reduce the risk of incidents, defects or other problems in manufacturing. Finds the most ideal solution in polymer molding, depending on production quantities, mold life, and aesthetic requirements.
Take care of any request and provide quick response to assist customers from the beginning.
If you need polymer casting or custom mold making, Rotational Molding is the company for you. Our production is of high quality and guarantees resistance, high precision and durability over time.