METHOD AND APPARATUS FOR MANUFACTURING A CIRCULAR CYLINDRICAL PRODUCT CONSISTING OF A PLASTIC MASS Russian patent published in 2021 - IPC B29C48/355 B29C53/14 

FIELD: engineering elements.

SUBSTANCE: invention relates to a method for manufacturing a circular cylindrical product. The technical result is achieved by a method for manufacturing a circular cylindrical product consisting of a plastic mass and provided with a spiral inner cavity passing in the inner part of the product. The method includes a stage of producing a circular cylindrical product (4), consisting of a plastic mass and provided with a rectilinear inner cavity passing in the inner part of the product, by means of a head (1) for extrusion moulding. The circular cylindrical product (4) is then removed from the head (1) for extrusion moulding by means of a twisting area (7) into a retaining and transporting apparatus (2) configured to retain and transport the circular cylindrical product (4) and rotatable around the longitudinal axis of the retaining and transporting apparatus. The circular cylindrical product (4) is twisted in the twisting area (7) to form a spiral inner cavity by rotating the retaining and transporting apparatus (2) together with the circular cylindrical product retained and transported in the retaining and transporting apparatus. The circular cylindrical product (4) with a spiral inner cavity passing in the inner part of the product is unloaded from the retaining and transporting apparatus (2) into a storage apparatus (3).

EFFECT: facilitated formation of spiral inner cavities in the product.

10 cl, 7 dwg