Continuous production of planar expanded polyurethane blocks

Details Continuous production of planar expanded polyurethane blocks Continuous production of planar expanded polyurethane blocks

1974-10-11

1976-10-05

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

With interposed non-adhering web or sheet type parting means

264463, 425224, 425290, 425817C, B29D 2704

Patent

active

039841952

ABSTRACT:
Apparatus for producing continuous polyurethane blocks is disclosed. The apparatus includes pressure regulating members to prevent a crowning of the upper surface of the foamed material. The pressure regulating members comprise a plurality of surface elements each of which is rigid and fixed with respect to an axis taken along the width of the foam. The plurality of elements is arranged or utilized so that the entire width of the foamed material is superposed. The surface elements may be in the form of shoes or rollers. The width of the foamed material may be adjusted by adjusting the apparatus side walls. In such a case, the plurality of surface elements will be arranged or utilized to superpose the entire width without the necessity of shutting down the process or manually adjusting the width of the elements. The shoes or rollers are pivoted or suspended from a common frame so that they are freely movable along the surface of the foamed material in the forward or reverse direction of foam movement. The apparatus further comprises means for enclosing the foam in a separating material, means for heating the foam surface, means for joining the material to the upper surface of the foam, and means for perforating the separating material lying on the upper surface of the foam.

REFERENCES:
patent: 3152361 (1964-10-01), Edwards
patent: 3178768 (1965-04-01), Edberg
patent: 3240846 (1966-03-01), Voelker
patent: 3354503 (1967-11-01), Joseph et al.
patent: 3383449 (1968-05-01), Muller
patent: 3471906 (1969-10-01), Henry
patent: 3553300 (1971-01-01), Buff
patent: 3574802 (1971-04-01), Hinds et al.

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