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Process-for-the-continuous-production-of-articles-or-coatings-with-contours-of-complicated-shape

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Process for the continuous production of articles or coatings with contours of complicated shape

Details

Inventors: Grimm, Wolfgang; Barnes, James M.;
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Examiner: Thurlow; Jeffery
Assistant Examiner:
Attorney, Agent or Firm: Harsh; Gene, Gil; Joseph C., Preis; Aron

The present invention is directed to a process for the continuous production of articles or coatings with contours wherein a liquid material is introduced at one end into the mold cavity formed between at least two travelling continous shaping faces, said material being cured in the mold cavity and subsequently removed from the mold, characterized in that (i) the travelling faces are moved downwards at least in the region of the material feed, (ii) the stream of material supplied is moved to and fro transversely to the direction of advance of the faces, and (iii) the quantity of material supplied is controlled so as to fill the mold cavity with a uniform coating and an apparatus for use therein.

DETAILED DESCRIPTION What is claimed is: 1.
A process for the continuous production of articles or coatings with contours wherein a liquid material is introduced at one end into the mold cavity formed between at least two travelling continuous shaping faces, said material being cured in the mold cavity and subsequently removed from the mold, characterized in that (i) the travelling faces are moved downwards at least in the region of the liquid material feed, (ii) the stream of liquid material supplied is moved to and fro transversely to the direction of advance of the faces, and (iii) the quantity of liquid material is supplied through an open inlet of the mold cavity and is controlled so as to fill the mold cavity with a coating having a non-uniform thickness said control being effected by varying the rate of advance of the travelling faces or by varying the oscillation rate of the stream while the quantity of liquid material supplied to the mold remains constant or by varying the quantity of liquid material supplied to the mold while the oscillation rate of the stream remains constant.
2.
The process of claim 1, characterized in that control is effected by varying the rate of advance of the travelling faces.
3.
The process of claim 1, characterized in that control is effected by varying the oscillation rate of the stream while the quantity of liquid material supplied to the mold remains constant.
4.
The process of claim 1, characterized in that control is effected by varying the quantity of liquid material supplied to the mold while oscillation rate of the stream remains constant.
5.
The process of claim 1, characterized in that polyurethane elastomer forming materials are used as the liquid material.

Description:
BACKGROUND OF THE INVENTION The present invention relates to a process and an apparatus for the continuous production of articles or coatings with contours of complicated shape, wherein a liquid material is introduced at one end into a mold cavity formed between at least two travelling continuous molding faces, is cured in the mold cavity and is then removed from the mold

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