| 摘要 |
An automated method for the manufacture of a coil spring assembly including inserting coil springs (Fig. 3) having predetermined multiple spring rates into respective individual pockets (12) of a continuous pocket strip in a predetermined order. The predetermined multiple spring rates of at least one coil spring may differ from that of the other coil springs, and each of the multi-rate coils has at least two different spring rates. One or more wires having a substantially uniform thickness are coiled (Fig. 14) to form the multiple rate coil springs before insertion into the continuous pocket strip. The wire is preferably coiled to produce a coil spring (Fig. 3) having at least two different diameters and at least two different pitches. The method (Fig. 14) also includes cutting the spring-filled strip into one or more desired lengths, placing at least two spring-filled lengths adjacent to each other and attaching adjacent lengths together. A coil spring assembly (10) may thus be provided with one or more firmness zones (20, 30, 40). |
