Two-shuttle thermoforming machine

Details Two-shuttle thermoforming machine Two-shuttle thermoforming machine

B - Operations, Transporting

29

C

18/1051, 18/1077

B29C 3/04 (1980.01)

Patent

CA 1065113

ABSTRACT OF THE DISCLOSURE In a thermoforming machine for forming products from plastic sheets or the like, two shuttles or sheet-carrying frames shuttle interchangeably between a feeding station and a forming and loading station, with the shuttle which carries the sagging heated sheet passing under the oppositely moving shuttle. At opposite ends of a transverse axis at the longitudinal center of each shuttle, pivotal connections are provided to vertically looped drive chains so that the shuttle can remain right-side up as it follows the looped path of its chains. Rails are pro- vided which support the shuttles and maintain them horizontal as they move. At the forming and loading station, snorkels engage the shuttle stopped there to provide suitable air pressure and discharge connections for operating sheet clamps by double-acting cylinders. The snorkels thrust the shuttle rearwardly against a ratchet, for accurate stop-positioning between snug side-cams.

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