Conveyor for fresh boxless sand moulds

Details Conveyor for fresh boxless sand moulds Conveyor for fresh boxless sand moulds

1993-03-01

1994-04-12

Bidwell, James R.

Conveyors: power-driven

Conveyor section

Reciprocating conveying surface

1987741, 1987743, B65G 2500

Patent

active

053017951

ABSTRACT:
A step conveyor for fresh boxless sand moulds includes at least two sets of interdigitating parallel bars adapted to support and move the sand moulds. The top of each bar is covered or coated by a layer of a material with a considerably lower thermal conductivity than that of steel. In a specific embodiment, a top rail is secured to a base member by screws, and this top rail is made of a suitable synthetic resin, such as low-pressure polyethylene with ultra-high molecular weight. With this arrangement, the tendency for moisture from the fresh sand moulds to condense on the conveyor bars is considerably reduced or eliminated, thus reducing or eliminating the tendency for sand from the moulds to adhere to the conveyor bars.

REFERENCES:
patent: 1942538 (1934-01-01), Cutler
patent: 3455433 (1969-07-01), Gentry
patent: 3489263 (1970-01-01), Gentry
patent: 3576246 (1971-04-01), Hulet et al.
patent: 3881595 (1975-05-01), Deve
patent: 4061231 (1977-12-01), Birdwell
patent: 4337857 (1982-07-01), Schneider
patent: 4540036 (1985-09-01), Jensen
patent: 4569437 (1986-02-01), Doerges
patent: 4653344 (1987-03-01), Nelson
patent: 4830178 (1989-05-01), de Vries

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