The production of shoe soles involves several steps, and there are different technologies and machines used in the sole moulding process.
Exemples of moulding machines
Injection
One of the most widespread methods to produce soles. Thermoplastic rubber, or other elastomeric materials, is melted and injected into a mould, creating the desired shape of the sole. This technology is fast and efficient.
Hot
In this process, the elastomeric material is heated and moulded into the desired shape using a press. It is a common technology to produce rubber soles.
Cold
This method involves positioning the elastomer material in the mould and using cold pressure or vibration.
Compression
This method uses the compression of an elastomeric material between two moulds to obtain the sole.
Machines to produce PU (Polyurethane) soles
In this case, PU casting and pouring machines are used. The liquid polyurethane is poured into moulds to obtain the sole.
Vacuum
In some cases, soles can be formed using this process, whereby the material is placed in a mould and then vacuum-formed.
3D printers for soles
Mainly used in sample production.
Machines to produce EVA (Ethylene Vinyl Acetate) soles
Moulding or hot sole machines are often used, which mould or cut the material according to the desired product.
Vulcanising machines
Some materials require the vulcanising process to achieve the right combination of elasticity and durability. This technology uses heat and pressure to process the material.
The choice of moulding machines depends on the material used, the production process and the specific design of the soles. Many sole factories use a combination of these technologies according to production requirements.
Learn more about the world of moulded soles.