Patent ID: 7118369

Claim:
An apparatus for the manufacture of corrugated pipes from thermoplastic in which mold segment halves ( 3 ), which complement one another in pairs, are guided together along a mold path ( 2 ) adjacent to an injection head ( 1 ), moved apart at an end of the mold path ( 2 ) and returned back to start separately from one another, comprising a mold path device ( 16 ) structured and arranged to move the mold segment halves ( 3 ) along the mold path ( 2 ) and a return conveyor ( 35 ) structured and arranged to return the mold segment halves ( 3 ) from an end of the mold path ( 2 ) back to the start, with the mold path device ( 16 ) comprising a machine table ( 4 ) having a lower guide ( 29 ) and lower drive means ( 17 ) for the mold segment halves ( 3 ) and a cover frame ( 8 ) secured to the machine table ( 4 ) having an upper guide and upper drive means ( 18 ) for the mold segment halves ( 3 ), wherein the upper drive means ( 18 ) are driving pinions ( 22 ) running around vertical axes perpendicular to the machine table ( 4 ) so that they allow displacement of the mold segment halves ( 3 ) perpendicular to the machine table ( 4 ).