Process for the manufacture of artifacts comprising a supporting structure of reinforced thermosetting plastics

Abstract

Abstract A process for the manufacture of load bearing plastics material structures is disclosed. The process allows small products to be made by mass production methods or large articles to be made in situ. by using, in both cases, the essential steps of the invention. A layer of plastics material is formed to the shape of the article to be manufactured and onto it is formed an intermediate layer having spaces which are subsequently filled with a material which will bond to the plastics material layer to form interconnecting strengthening ribs. The intermediate layer may be formed by a plurality of suitably spaced blocks or strips, or by a helically wound strip in the manufacture of a tubular article, or by forming a continuous layer and subsequently cutting out the spaces required for the strengthening ribs. After the material forming the strengthening ribs has been put into the spaces provided therefor a further plastics material layer is formed over the intermediate layers and the structure is bonded by polymerizing the two said plastics material layers to the strengthening ribs. In an alternative described in the specification the intermediate layer may be formed first, provided with strengthening ribs, then the two plastics material layers formed on the inner and outer faces of the intermediate layer, and finally the whole structure is bonded by polymerization of at least the two plastics material layers, and possibly of the strengthening ribs if these are formed of a thermosetting plastics material.

Inventors

• 👤 D Piccioli
• 👤 C Schmid

Bibliographic Details