Process for producing a plastic leaf spring, as well as a plastic leaf spring appropriately manufactured according to this process
US4659071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Oct 16, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F1/3686
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the process for producing a leaf spring which, at least in essential springy sections, is composed of a fiber-reinforced plastic material, a continuous web (9) is formed comprised of reinforcing fibers, appropriately in the form of fiber rovings or fibrous tissues, with the reinforcing fibers being appropriately impacted or impregnated with a hardenable plastic substance, whereupon intermediate layer pieces (37) are appropriately put on the continuous web (9). The continuous web (9) is then wound up in several layers (36) on a rotating pick-up device (27) into a continuous reel (35), with the intermediate layer pieces (37) arranging themselves in the continuous reel (35) between contiguous superposed continuous web layers (36); the continuous reel (35) is then placed in a mold in such a manner that it adjoins along its entire periphery the barrel-shaped contact area of the mold chamber. Thereafter, the hollow spaces still present between the reinforcing fibers in the mold chamber are filled up by the introduction of a hardenable plastic substance, and the plastic material in the mold lastly solidifies and is cured to become the leaf spring blank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.