Method and apparatus for continuously producing an integrally molded double-sided surface fastener
US5393475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Jun 17, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/729
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for easily producing a double-sided surface fastener molded integrally in a simple process, which provides easy disengagement in spite of high engaging strength and high durability in repetitive use. A molten resin is extruded from an extrusion nozzle at the predetermined width and is introduced into a predetermined gap between upper and lower die rollers which are disposed up and down with the gap and are provided with a plurality of engaging element forming cavities on the respective peripheries and cooling means in the inner portions. The upper and lower die rollers are concurrently driven and rotated in the extrusion direction of the molten resin while filling the engaging element forming cavities with the molten resin, so that a plurality of hook elements are continuously molded integrally on the both front and back surfaces of a plate-like base portion and are cooled to the predetermined temperature. The engaging elements of cooled resin molded article are removed from the cavities and are positively drawn out in the extrusion direction of the molten resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.