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TECHNOLOGY

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OUR PRODUCTION PROCESS

Top Glass is specialized  in the production of TRIGLASS® fibreglass profiles using three different technologies: pultrusion, pullwinding and centrifugation. Each production technology has its own peculiarities and is suitable for specific types of profiles.

PULTRUSION

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Pultrusion (from the English words: pull + extrusion) is a technology that is the equivalent of extrusion applied, in this case, to composite/fiberglass material, a continuous process which is ideal for high-volume industrial production
adapted for making constant section straight profiles without length limits
Traditional pultrusion technology produces unique results that are aimed at users who need composite profiles with high performance in a longitudinal or lengthwise direction. 
Pultrusion technology is by nature economically advantageous when it is done on a large scale and when long pieces are needed (limits to length are not technological but logistical). It is also indicated, of course, when the inherent, multiple physical and mechanical features of composite materials are desired.
1. IMPREGNATION STATION
The production process involves bringing together reinforcing fibres, according to the specified requirements of the process and final product. This occurs through in an impregnation station.At this stage, the fibres come into contact with a polymer matrix containing the base resin, additives, catalysts, pigments and mineral fillers and are thoroughly impregnated with them.
2. PROFILE CONFIGURATION
The sequence requires that the impregnated fibres go through an area where they are preformed, taking on the structural configuration and final shape of the desired profile section.
3. INSERTION INTO MOULD
The preformed material passes into a heated mould where a polymerization reaction occurs. This generates a transition into a polymer matrix phase going from liquid to solid.
4/5. PULTRUSION AND CUT
Once in a solid state, a pulling mechanism grips the profile area by means of special devices and directs it continuously to the last station, which cuts the profile according to a predefined length.
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CENTRIFUGATION

Centrifugal casting is a production technology used to make composite poles in the shape of a truncated cone with maximum length, set only for logistical constraints, of 13.6 metres. This technology makes it possible to make products with a high degree of dimensional and physical-mechanical repeatability. 
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PULLWINDING

Pullwinding technology is used for producing tubular profiles with superior rigidity and mechanical resistance. Pullwinding, used to create tubes, differs from traditional pultrusion in that it uses both roving placed longitudinally and circumferentially with respect to the profile's axis in order to obtain superior rigidity.

Find out more about the quality and benefits of TRIGLASS® material.

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TOP GLASS Industries S.p.A.

Via Dei Soldani, 3 23875 Osnago (Lecco) - Italy - Tel. +39 039 95223.1 - Email: info@topglass.it
P.IVA 04016260988 C.F. 04016260988 R.E.A. BS-581785. REG. IMPRESA 04016260988
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