B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/13, 25/15
B28B 21/00 (2006.01)
Patent
CA 1103905
ABSTRACT OF THE DISCLOSURE A machine for "dry mix" packerhead concrete pipe manufacture has two stations and a separable tubular jacket movable there- between. A rotatable cylindrical packerhead is movable axially within the jacket and a "dry mix" delivery means deposits mix atop the packerhead as it rotates and moves vertically upwardly within the jacket. The packerhead distributes the mix there- about to form a concrete pipe in the jacket. A radially expan- dable and contractable core is movable axially in a contracted condition to a position within the pipe and is then expanded. Vibrators within the core are operated to "redensify" the pipe; that is, to compact the mass thereof, to eliminate voids, and to relieve residual forming stresses therein. A guide ring is employed to align the contracted core axially with the pipe during entry and further guiding and supporting devices for the core are provided. Core entry and withdrawal is power actuated as is core expansion and contraction within the pipe. Expan- sion and contraction devices may comprise fluid cylinders oper- ated adjacent a single axial split line in the core or, true circle expansion and contraction means may be provided with a core having one or more axial split lines.
316742
Kart Warren E.
Toffolon Roger L.
Atlantic Pipe Corporation
Ridout & Maybee Llp
Toffolon Roger L.
LandOfFree
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