SU1436129A1 - Press nozzle head for applying aluminium sheet over cable strand with impregnated paper insulation - Google Patents

Abstract

The invention relates to electrical engineering, in particular to the manufacture of cables. The purpose of the invention is to reduce the consumption of compressible aluminum by reducing the thickness variation of the shell as a result of filling the aforementioned gap with an impregnating mass and uniformly cooling the core around the perimeter inside the mandrel. The head contains a front stop, a die holder, an airflow system, a Dorn 5 matrix, a Tip 6, a mandrel body 7, a mandrel holder, a rear stop 9, a cable core cooling system 10, a relief valve, including a disk 12 with openings for the descent of excess oil pressure, plate 13, cup spring 14, nut 15. The support of the impregnating mass in the gap between the tip 6 and the mandrel 5 is the pressure required to fill it with the mass, created by means of an overflow valve. When the specified pressure is reached, the impregnating mass, filling the gap j, evenly cools the mandrel 5 and the cable core inside the mandrel. If the air pressure is exceeded. V. The bypass valve transfers part of the mass to the cavity between the drain holder and the cooling system 10. 2 ill., 1 tab. (Ls

Description

2

12 J5 GO

The invention relates to electrical engineering, in particular, to the design of a pressing tool for applying a metal sheath to a cable core with paper, impregnated mass, and insulation.

The purpose of the invention is to reduce the consumption of aluminum by reducing the thickness of the shell as a result of filling the gap between the mandrel and the tip located inside the barrel with an impregnating mass and uniform cooling of the core along the perimeter inside the mandrel.

FIG. 1 shows a head for applying a metal sheath on a cable core, a slit; in fig. 2 - part of the core cooling system on the side of the mandrel, section I The head of the press includes front jynop 1, die holder 2, backtracking system 3, matrix 4, mandrel 5, end terminal 6, housing 7 mandrel, mandrel 8, rear stop 9, cable core cooling system 10, Overflow valve 11. I Overflow valve 11, consists of (cisca 12 with openings for overpressure of mass (oil), plate 13, cup-shaped spring 14, nut 15.

I Dorn 5 is installed against the stop in the jnyce 7 mandrel, which is in failure, the queue is installed against the stop in the backrest: 8 press heads. Cooling system:: made in the form of a tip 6 located with a gap inside the mandrel 5, to the end of which, on the side opposite to the spout, adjoins a set of coaxially arranged pipes for the circulation of cooling fluid. An overflow valve 11 closing the above-mentioned gap from the end face of the tip 6. It consists of a metal disk 12 with openings for the release of excess pressure of the impregnating mass (oil) pressed through the cup-shaped spring 16 and the plate 13 by means of a nut 17 to the flange of the inlet fuse of the mandrel 7 of the mandrel .

At the exit of the press head, the cable core cooling system is provided with an axial fixation element (not shown), ensuring tight contact of the disk 12 of the bypass valve with the inlet ram of the mandrel body 7. Clamp Design

five

0 5 o

Q r

five

0

can be any, for example in the form of a spring-loaded latch.

The operation of the press head is illustrated by the example of the process of applying an aluminum sheath on a cable core on a batch press.

Before pressing, the cable core cooling system is inserted into the head up to the stop and fixed in this position, then the cable core 16 is filled, after which water is pressurized into the cooling system, and the pressing process is started, in which the cable core is pressed into an aluminum jacket 17, formed in the annular gap between the mandrel 5 and the matrix 4. Backing impregnating mass in the gap. between tip 6 and mandrel 5, the pressure required to fill it with mass is created by means of valve 11. When the specified pressure is reached, the impregnating mass fills the said gap and evenly cools the cable core inside the disk, and if the pressure is exceeded, the bypass valve 11 bypasses part of the mass to the cavity between the shoulder holder 8 and the cooling system 10 of the cable core 16.

This ensures intensive heat removal from the cable core, uniform cooling of the mandrel and, as a result, pressing with less (less than 0.3 mm) solidity.

The results of measuring the thickness variation of cable sheaths made using the proposed head and the known head, which, unlike the proposed one, does not have a valve, are shown in the table.

The use of the proposed head design allows reducing the consumption of aluminum in the manufacture of casings to 2%.

Claims (1)

Invention Formula The head of the press for imposing an aluminum sheath on the cable core with paper, impregnated mass, insulation, containing a mandrel, the tip of which is facing the matrix, the cooling system of the core, which is in the form of a core with 4ai (inside the terminal; butt 3 14361 which, on the side opposite to the spout, adjoins a system of coaxially arranged pipes for circulation of coolant, characterized in that, in order to reduce the consumption of extruded aluminum by decreasing the size 29 .4 The sheath thickness as a result of filling the said gap with an impregnating mass and uniform cooling of the core along the perimeter inside the mandrel, is equipped with an overflow valve that overlaps the said gap from the end face of the tip. AAShWU 3 1 50 -Br. AASHVU 3x150-10 AASHVU 3x70-10 AAShWU 3 X 240-1in. 41.0 44.0 34.0 43.0 37.0 1.52-1,670.28 1.77-1.80 1.48-1,800,32 40.0 1.51-1.800.29 1.49-1.790.30 29.5 1.32-1.480.161.30-1.510.21 39.0 1.55-1.800.25 1.50-1.840.34 1.48-1,800,32 u : h