SU250439A1 - - Google Patents

Description

A known method of producing hoses by extrusion with simultaneous reinforcement with a wire helix fed into the extruded hose with the subsequent cutting of the hose into separate segments at the joints of the ends of the helix pieces bonded to each other by welding.

But not a strong connection is obtained.

In order to ensure reliable connection of the ends of the helix segments and to facilitate subsequent, her hose cutting operations into individual lengths offer a method, characterized in that the ends of the reinforcement helix segments are overlapped with each other using an elastic material with heat resistance not less than the heat resistance of the extruded sleeve. .

FIG. 1 shows a flow chart for the production of the hose;

in fig. 2 - spiral cut, connected by an elastic tube;

in fig. 3 shows the design of the hose at the junction of the segments of the helix;

in fig. 4 —plot of cutting the hose at the junction of the spiral.

Channel 7 is intended to form tube 5, and chamber 9 is intended to form a corrugation on tube 8. The flow chart includes a cooling device 10, a pulling roller mechanism 11 and a hose cutting mechanism 12 including a guide sleeve 13, a cutting device 14 with a knife 15, and a probe sensor 16.

Installation for the production of the hose works as follows. The segments of the spiral 2 coming from the spring-coiling machine are manually connected using the tube 3 on the tray /. The endless helix 2 thus formed enters mechanism 4, where with the help of rollers 5 and 6 rotating at different speeds it is stretched to a certain predetermined pitch, which is maintained with the help of a pulling roller mechanism //

with the passage of the extrusion head 7, the chamber 9 and the cooling device 10.

With the passage of the extrusion head 7, the helix 2 is boned by the tube 8, which is in a semi-plastic state, is corrugated in the chamber 9 due to the difference in air pressure from the outer and inner side of the tube. The final cooling of the α-frilled tube 8 takes place with the passage of the cooling device 10.

and in the process of transportation to the cutting mechanism / 2. In the mechanism 12, the hose passes through a guide sleeve 13, the inner diameter of which corresponds to the diameter of the hose at the junction of the spiral segments. Upon exiting the guide sleeve 13, the thickened part of the hose runs over the probe of sensor 16, which gives the command to operate the cutting device 14, the knife 15 cutting the hose at the junction of the coils, i.e. cutting the corrugated tube 8 of the connecting tube 3 .

The connecting tube 3 can be made, as well as the corrugated tube 8, from polyvinyl chloride.

The inner diameter of the connecting tube 3 should be approximately equal to two

the diameter of the wire helix, and its length is approximately equal to the turn of the spiral.

Subject invention

A method of making extrusion hoses with simultaneous reinforcement with a wire helix fed into the extruded hose, followed by cutting it into separate sections at the junction of the ends of the helix segments, characterized in that, in order to ensure reliable connection of the ends of the segments, the ends were cut and facilitated the cutting operation. pieces of reinforcing helix fasten with each

another overlaps with the help of a tube made of an elastic material with a heat resistance not lower than that of an extruded sleeve.