| 摘要 |
<p>The machine uses a foamed thermoplastic material in sheets or a foamed material coupled with a synthetic or natural fabric prepared so as to form a band (3) of adequate width. The band is moved step by step by a chain advancement system into a softening over (2) so as to heat it until it reaches its molding temperature. After this heating in the oven, the band is moved to a forming station (38) where it is shaped as required by molds (53,54). In a successive station (55) the thermoformed article is cut with a die-cutter (62) the blade whereof acts against a heated steel plate (63) so that the foamed thermoplastic material and the fabric coupled therewith are mutually heat-welded simultaneously with their die-cutting. Mechanical systems (48,64) for advancing the band, adjusting the closure of the molds and making die-cutters adhere to the heated abutment plane are provided in the two forming and die-cutting stations. The closure movement of the two forming and die-cutting stations with die-cutters occurs by means of toggle kinematisms (52,61).</p> |
