Hull, mold therefor, and process for producing same

US4099280A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Hoppe · Sunnyvale, US
• Helmut Leyer · Leichlingen, DE
• Johann Muller · Burghausen, DE

Key dates

• Filing date: Dec 12, 1974
• Grant date: Jul 11, 1978
• Expiry date: Dec 12, 1994

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/83
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Marginal zone-reinforced foam moulding, especially for hulls, are produced in situ technique by coating the inner surface of a mould with a viscous, hardenable adhesive or gel-coat; placing a fiber-reinforcing insert into this layer while it is still viscous; laying an airtight flexible film on this insert and sealing it off outside its dimensions; subsequently removing the air present between the mould and the film under suction and simultaneously pressing the reinforcing insert into the layer of adhesive or gel-coat; removing the film; closing the mould; introducing a liquid, expandable reaction mixture into the mould cavity; and removing the foam moulding from the mould on completion of foaming.