SU1689474A2 - Device for removing needle fragments from moving web - Google Patents

Description

The invention relates to light industry, can be used, ’for example, in the production of non-woven base synthetic leather, felt, felt

medical supplies igloprobivnym way and allows you to increase reliability and improve the quality of the canvas. The device has means for cleaning the working part of the magnetic circuit 4 to maintain the web. Means for cleaning the working part of the magnetic circuit contains a slider made of magnetic material located on the working surface of the magnetic circuit and made with an anti-friction coating identical to the working surface of the electromagnet, and is associated with a moving drive. The means for supporting the web is made in the form of supports installed before and after the electromagnet in the direction of the web and has a drive for their vertical movement. 1 hp f-ly, 2 ill.

The invention relates to the light and textile industry and can be used, for example, in the production of non-woven base of synthetic leather, felt, felt, medical materials, obtained by needle-punching method.

The aim of the invention is to improve reliability and improve the quality of the canvas.

FIG. 1 shows the proposed device, side view; in fig. 2 - the same, top view.

The device contains an electromagnet 1 (FIG. 1) with a coil 2 and a core 3 enclosed in a housing 4, which is simultaneously a magnetic core. On the core width of the blade is fixed plate 5, the surface of which is the working part

electromagnet. Plate 5 has a bevel 6, which, together with the bevel 7 of the magnetic circuit forms a working gap 8, another additional part 9 of the magnetic circuit forms a gap 10 with the working surface of the magnetic circuit. The surface of the plate 5, facing the canvas, has grooves 11.

The device is installed in close proximity to the moving web 12, in which there are fragments of needles.

Means for cleaning the working part of the magnetic circuit contains a slider 13, the working surface of which, facing the working surface of the electromagnet, is identical to the latter. To reduce friction, the working surface of the slide has an anti-friction coating 14 made of a non-magnetic material with a low friction coefficient, for example, fluoroplastic,

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cloth. The slider itself is made of magnetic material, which ensures that it is pressed tightly to the magnet without the use of special means. The thickness of the coating material regulates the necessary degree of pressing the slider to the magnet.

The device is additionally equipped with a drive containing an engine with a gearbox 15 (Fig. 2) and a wire transmission 16, one of the branches of which is fixed to the slider by means of the biscuit. In the extreme position the slider extends beyond the edge of the electromagnet. The extreme positions of the slider 13 are fixed by limit switches 18, installed on both sides of the device.

To ensure the free passage of the slide, the device is equipped with a means for lifting the blade containing rollers 19 and 20 mounted before and after the electromagnet in the direction of the blade 12. The free ends of the rollers are mounted on the rods of the pneumatic or hydraulic cylinders 21 and 22 that drive the vertical movement of the rollers.

The device works as follows.

The blade 12 with fragments of needles 23 moves in close proximity to the working surface of the electromagnet 1. The fragments of needles 23, falling within the range of the magnetic field created in the working gap 8 of the bevel 7 and chamfer 6, cover the gap and due to magnetic forces remain on the surface of the bevel 7 and chamfers 6, leaving the blade 12. The remaining fragments of needles 23 as the blade moves swings protrusions forming the grooves 11. Some of these fragments can remain in the grooves.

Fragments of needles 23, located in the plane of the sheet 12, are extracted from it by magnetic field forces acting in the gap 10 formed by part 9 of the magnetic circuit ί and the working plate 5, and remain on their surface, blocking the gap.

When the accumulation of debris needles on the working surface of the electromagnet include pneumatic or hydraulic cylinders 21 and 22, resulting in the canvas 12 rises above the slider 13, this turns off the electromagnet 1. Then turn on the drive of the slider and the slider moves from one extreme position to another. Since the slider due to the residual magnetization forces of the slider itself and the electromagnet, as well as its own weight, is pressed against the working surface of the electromagnet, the fragments of needles are shifted to the edge of the electromagnet 1 and removed beyond its limits, then to the electromagnet again. the tension is applied, the rollers are lowered and the process of cleaning the base (blade) from the needles continues.

Using this device allows with minimal time and labor to produce the removal of needle fragments from an electromagnet, which increases the efficiency of its work, improves the quality of products.

Claims (2)

Claim 1. A device for removing debris needles from a moving web by author. St. No. 1201379, characterized in that, in order to improve reliability and improve the quality of the web, it has a means for cleaning the working part of the magnetic circuit and a means for maintaining the sheet, and the means for cleaning the working part of the magnetic circuit contains a slider made of magnetic material located on the working the surface of the magnetic circuit and is made with anti-friction coating identical to the working surface of the electromagnet, and has a drive to move it. 2. The device is pop, 1, characterized in that the means for maintaining the web is made in the form of supports, installed before and after the electromagnet in the direction of the web, and is driven to move them vertically. 1689474