SETVIS-FISAT: AN EXPERIENCE PARALLEL WITH THE HISTORY OF THERMO HARDENING MATERIALS

Moulding of thermo hardening materials by compression or transfer: one of the company’s main activities since the 1950s

Our extensive experience in moulding technical items in thermo hardening materials was gained through a long history that started in the 1950s, the period in which this was our primary company business.
Thermo hardening materials have the characteristic of allowing moulding of items with elevated thicknesses and significant mechanical resistance, suitable for electro-mechanical applications thanks to dielectric rigidity, self-extinguishing, arc resistance, high chemical resistance, elastic bending module and anti-static.
Their very low shrinkage level makes thermo hardening materials ideal for moulding items with decimal tolerance requirements.

an operator working on a vertical press
an operator working
on a vertical press

The moulding pressure and the cross-link process of the chemical structure of the materials used are the two primary phenomena that characterize this process. A consequence of the aforesaid cross-link structure in thermo hardening materials, in contrary to thermoplastic materials, is that these cannot be subjected to an inverse process, or any further variation of their state, from solid to liquid-elastic, and this means that these materials are not recyclable, but it is this very characteristic that lends these materials all their specific qualities.

DIRECT COMPRESSION MOULDING

We execute direct compression moulding through the use of vertical presses, a type of processing widely used due to the lower costs of the moulds and their significant versatility. Punches and matrices arranged in an open position house the materials in the form of powder, fabric or paste. After the mould is heated and closed, compression (hence the name of the type of moulding process) of the punch facilitates movement of the material, which once compressed acquires the shape of the mould and initiates the molecular cross-linking process. The mould is then opened after a cooking time and the product can be extracted.

TRANSFER MOULDING

This process can be defined as a technology that uses both the compression technique as well as the injection technique. One of its characteristics includes the possibility to insert material into the mould when it is in a closed position, for special cases where the complex morphology of the items does not permit loading with an open mould. After the material is loaded into a preliminary chamber, a special piston injects it into the cavity of the mould, giving it shape and then initiating the molecular cross-linking process. Once this phase is concluded the mould can be opened to allow extraction of the item.

co-moulded items in thermo resistant reinforced resin with low shrinkage, and thickness up to approximately 60 mm
co-moulded items in thermo resistant reinforced resin with low shrinkage, and thickness up to approximately 60 mm

see the primary type of thermo hardening materials

also see the “showcase” | thermo hardening moulding

PHOTO GALLERY: SOME RESOLVED CASES

A series of items in thermo hardening materials moulded by Setvis-Fisat

VIDEOS: SOME PRACTICAL EXAMPLES

Series of videos illustrating the moulding phases and some thermo hardened items

display videos

Prossimamente in questa sezione, i nostri filmati sullo stampaggio dei materiali termoindurenti.
(sopra, un filmato della nostra sezione Setvis-Fisat dental technology)

Prossimamente in questa sezione, i nostri filmati sullo stampaggio dei materiali termoindurenti.
(sopra, un filmato della nostra sezione Setvis-Fisat dental technology)