HOLE-FORMING CORES FOR MANUFACTURE OF HOLLOW-SHAPED PRODUCTS FROM BUILDING MIXES IN SHUTTERING OR IN MOULDING RIGGING

摘要

Use: in the manufacture of construction products with voids having periodic broadening. SUMMARY OF THE INVENTION - side housing elements forming the broadening is attached to the front of the central shaft section by means of radial support walls and are rotatably mounted via the shaft into contact with the radially arranged limiters fixed to the upper and lower housing elements, between which when demoulding can be placed the side members, the drive shaft may be formed toothed, and the ends of the upper and lower elements can be fixed to the thrust flange for their Nat Zheni sn 2 f-ly, 10 yl