Patent ID: 6340442
Filing Date: 2002-01-22
Classification: B28B,B29C

Abstract:
A method for the production of tubular products from a molding material in which said molding material is introduced into a molding space between a mold core and a mold casing which surrounds said mold core and said molding material is supported on a closing part disposed below said mold core and said mold casing, wherein said mold core and mold casing have a longitudinal central axis which is vertically disposed, comprising the steps of:providing a mold core and a mold casing along with a molding space between said mold core and a mold casing; providing said mold core and said mold casing each with an axial length which is less than the length of the tubular product to be produced; introducing said molding material from above said molding space into said molding space to form a column of molding material in said molding space; shaking said molding material which has been introduced into said molding space; heating said molding material which has been introduced into said molding space; commencing curing of said molding material in a lower region of said molding space; discharging said molding material which has commenced curing from said lower region of said molding space in the form of a discharging column of solidified molding material; lowering said discharging column of solidified molding material by lowering said closing part relative to said mold core and said mold casing; passing additional molding material from above said molding space into said molding space; simultaneously performing said passing step and said discharging step; shaking said additional molding material in said molding space; heating said additional molding material in said molding space; and continuing lowering of said column of molding material until said column of molding material is at a height corresponding to a desired longitudinal length of the molded product which is greater than the axial length of Said mold core and said mold casing.