Pultrusion apparatus
US5716487A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1996 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Jun 3, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C70/525
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a pultrusion product having a variable cross-section using a specially adapted temperature controllable pultrusion die includes the steps of pulling reinforcing fibers which have been impregnated with a heat curable thermosetting polymeric resin composition through a temperature controllable die, heating the temperature controllable die to a temperature sufficient to effect curing of the thermosetting resin, cooling the temperature controllable die to a temperature which is sufficiently low to prevent any significant curing of thermosetting resin passing through the pultrusion die, pulling the cured material and a predetermined length of uncured material from the die, reshaping the uncured material, and curing the reshaped material. The reshaping step can be used to provide off-sets, flanges, bosses and the like. The method and associated apparatus of the invention provide a relatively simple and inexpensive way of producing fiber-reinforced thermoset plastics having a variable cross-section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.