Patent ID: 7517209
Filing Date: 2009-04-14
Classification: B29C

Abstract:
1. A molding system producing corrugated pipe including a first series of mold blocks secured to a drive arrangement moving said mold blocks along a molding path and abutting with a second series of mold blocks secured to a drive arrangement for moving along said molding path with said first and second series of mold blocks forming a moving mold tunnel determining the shape of the corrugated pipe; and wherein each mold block includes a plurality of troughs integral to the mold block with the troughs spaced in a length of the mold block; each mold block between adjacent troughs including a crest mounting portion integral with the mold block with each crest mount portion including between adjacent troughs an upwardly opening recess on said crest mounting portion; said molding system including first and second crest forming parts where each crest forming part is mountable on one of said cresting mounting portions and cooperates with the troughs either side thereof to form corrugations in the corrugated pipe; said first crest forming parts when secured on said mold blocks producing corrugated pipe with corrugations of a first size and said second crest forming parts when secured on said mold blocks producing corrugated pipe with corrugations of a second size greater than the first size; each crest forming part including a projection of a shape for receipt in and abutment with one of said upwardly opening recesses; each mold block with respect to each crest forming part includes mounting bracket arrangements at opposite ends of the crest forming part securing said crest forming part in said recess of the respective crest mounting portion; and wherein each crest forming part is removable from a mold block by release of said mounting bracket arrangements and movement of the crest forming part upwardly out of the respective upwardly opening recess.