RU1838138C - Method of making the ring blanks of solid tyres - Google Patents

Abstract

Usage: the manufacture of ring blanks of solid tires. SUMMARY OF THE INVENTION: An annular preform consisting of an outer layer of a material with high deformability and at least one of the inner layers of an elastic material reinforced with a fibrous filler is subjected to radial deformation with an increase in the inner diameter by applying a deforming force to the inner layer. The deformation is carried out by the relative axial movement of the annular blank and the tool to create a deforming force. 1 s.p. f l, 1 ill.

Description

FIELD OF THE INVENTION This invention relates to the manufacture of TIs, primarily tires of vehicles.

The aim of the invention is to improve the quality of manufactured products.

The method is carried out as follows. the basics.

An annular billet (see drawing), consisting of inner 1 and outer 2 parts, the first of which is made of elastomeric material reinforced with Yulokn, and the second of elastomeric material without fibrous filler -, are twisted by radial deformation by moving either the annular workpiece from parts 1 and 2 in the axial direction, or the expander 3. In this case, the diameter of the workpiece, for example, the inside, increases from di to d2, and the workpiece is compacted with forced air displaced, accompanied by additional ADDITIONAL circumferential orientation of the fibrous filler in the part 1. The presence of the outer ring member 2 allows to deform the part 1 at a fairly high percentage of deformation without damage (experimentally found is higher than 15%). In the absence of an outer part 2, it is not possible to deform the part 1 without damage.

Example. Ring billet of a massive highly elastic tire 6.50-10 mod. F-184 is assembled from three parts: inner, containing 10 vol.% Polyamide fiber, medium, containing 2 vol., -% polyamide fiber, outer, not containing fibers. In the mold closing process, the expander & billet, causing, along with compaction of the billet and displacement of laden air, an additional circumferential orientation of the fibrous filler in the parts of the inner and middle parts. Workpiece deformation on

b

Yo

00 w 00

CA) 00

with

23% makes it possible to obtain an increase in tire turning resistance on the rim, ceteris paribus, by 45%, which opens up the possibility of improving the quality of products along with simplifying the technology for their manufacture.

Claims (2)

SUMMARY OF THE INVENTION 1. A method of manufacturing ring blanks of solid tires, wherein a ring blank is made up of an outer ring layer of a material with high deformability and at least one inner annular layer of elastic material reinforced with a fibrous filler, characterized in that the preform is subjected to radial deformation with increasing inner diameter by applying a deforming force to the inner layer. 2. A method according to claim 1, characterized in that the deformation is carried out by relative axial movement of the annular workpiece and the tool to create a deforming force.