SU1650446A1 - Hole-forming core - Google Patents

Abstract

The invention relates to the production of products with voids and provides an improvement in the quality of products and a reduction in the labor intensity of the stripping. This is achieved by the fact that the ha 6 is equipped with a rotation mechanism 12, and the casing is made of telescopic outer 1, intermediate 2 and tail 3 cylindrical sections. The intermediate 2 and tail 3 sections on the outer surfaces have protrusions, and the outer 1 and intermediate 2 sections have guide grooves with stops for accommodating the projections. The guide grooves of the outer 1 and intermediate 2 sections are made spiral-shaped. 1 hp f-ly. 9 il.

Description

h

Aa

B

one

AT

3

Fig.Ch

FI.5

FIG. 6

73

10 11 1 16 623

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7

9 12

FIG. eight

FIG. 9

Claims (2)

Claim 1. A core former containing a movable central rod installed in the bracket at one end, connected by its free end to the front end of the housing concentric with respect to it, mounted in the bracket, characterized in that, in order to improve product quality and reduce the complexity of the formwork, the rod is equipped with a rotation mechanism and the body is made telescopic from the outer, intermediate and tail cylindrical sections, with the intermediate and tail sections on the outer surfaces and the outer and intermediate sections on the inner surfaces respectively have protrusions and guide grooves with stops for accommodating the protrusions. 2. The hollow core according to claim 1, characterized in that the guide grooves of the outer and intermediate sections are screw-shaped. FIG. 6 Fig.Z Compiled by V. Tchaikov Editor N. Tupitsa Tehred M. Morgenthal Corrector S. Shevkun • G- Order 1574 Circulation 395 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent '', g., Uzhgorod, 101 Gagarina St.