Apparatus for continuous molding of reinforced resin profile members
US3954379A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1974 |
| Grant date | May 4, 1976 |
| Priority date | — |
| Expiry date | Jun 21, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/17092
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus is provided for the continuous molding of hardened resin construction members reinforced with fiber material precisely positioned and arranged during the continuous molding process. The reinforcing fiber material in the form of continuous rovings, woven webs, fabric, fleeces, etc. and having a sizing is fed into an elongated hollow molding duct where the material is first compressed and heated to bond the fibers together at their points of contact to form a grid structure. Synthetic resin is injected into the duct intermediate its ends to impregnate the grid structure and be shaped by the molding duct with the reinforcing fibers contained within the resin. The synthetic resin is then hardened by heating as the shaped resin passes further along the duct forming the finished construction or profile member. The profile member produced by this apparatus may include longitudinally extending openings reinforced by circumferentially arranged reinforcing fibers so that the longitudinal openings can withstand excessive radial stress exerted by expandable fasteners used to construct articles from the profile members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.