JPS5812943B2 - Kinsai Souchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an end-side sealing device between a rotating pair of rollers and a fixed stuffer box.

A sealing device of this type is particularly suitable for sealing a feed roller against a fixed wall of a push-crimping device for crimping, for example, cable-shaped high polymer yarns.

The most common failures in operation with this known push-crimping device occur at the point of contact between the end face of the feed roller and the fixed wall of the stuffer box.

To avoid filament accumulation in this location, side grates are often inserted into the side walls of the stuffer box, and these side grates are often accurately ground to a flat surface and maintain a gap. Despite this consideration, it is actually always pressed against the rotating end surface of the feed roller.

In order not to damage the end faces of the feed roller, soft materials such as graphite, brass or bronze are often used for the side plates, but these materials wear down to nM.

For this reason, the side plates often have to be replaced, which leads to interruptions in the production process.

Insertion of a new sight plate requires great skill, and adjustment of the distance of the side plate relative to the end face is primarily subjective and therefore requires the presence of well-trained and skilled personnel.

Various configurations proposed to increase the service life can be found in a series of patent applications, which describe the wear of the side plates so that replacement of the side plates is only required infrequently. This raises the issue of reducing the

For example, it is known from German Patent Application No. 14 35 441 to change the side plate with a crimping band driven in a direction opposite to the feeding direction of the filament cable.

A thrust washer is described in DE 2117395 and also in DE 1959863, which thrust washer is axially mounted on the feed roller. It can be rotated on its own eccentric bearing or by its own drive.

In all embodiments of side plates or other sealing elements known up to now, the required sealing is achieved by crimping the sealing element against the rotating end face of the feed roller, resulting in uniform wear of the side plates only in the best case. care has been taken to ensure that this is achieved, thereby extending the unimpeded production cycle between two replacements of the side plates.

However, installation of the side blades still presents difficulties and adjustment of the side blades relative to the end faces of the feed roller pair can only be done subjectively.

Therefore, it is still necessary to press the side plate against the end face of the feed roller pair with varying degrees of force each time, and to accept wear of the side plate.

The problem of the present invention is that in order to seal the feed roller against the side wall of the stuffer box particularly in a push-crimping device, the position of the side plate with respect to the end face of the roller pair is once adjusted and determined, and the side plate is fixed on the side plate of the roller pair. A sealing device between a rotating pair of rollers and a stationary chamber so that a small free gap can be maintained between the side plate and the end face of the pair of rollers without being pressed against the rotating part. It is to create.

Even if the side plate needs to be replaced, the position of the side plate can be recreated at the lowest possible cost.

This problem is solved based on the present invention, in which the sealing plate is provided in pressure contact with the end surface of a packing element provided within the end surfaces of the feed rollers at a position covering the gap between both feed rollers, and this packing element is provided within the end surfaces of the feed rollers. The solution is that the bearing is axially adjustable on a bearing.

In a preferred embodiment, the sealing element is supported via a bearing element against the drive shaft of the roller or against the end face of the roller;
and an adjusting device, which makes it possible to adjust the position of the end face of the packing element with respect to the bearing arrangement and thus the relative position of this end face with respect to the end faces of the roller pair before the device is put into operation. .

This adjustment reproducibly determines the position of the sealing plate adhering to the end face of the sealing element relative to the end face of the roller pair.

The invention will be explained in detail below with reference to the embodiments shown in the drawings.

The drawing shows a partial section of the push-in crimping device in the plane of the two axes of the pair of feed rollers and thus of the drawing gap as the contact line of both rollers.

Both feed rollers 1 and 1' have mutually parallel axes 2 and 2
′.

Usually it is movably bearing on one of both axes.

The associated feed roller is pressed against a second feed roller which is fixed to the machine frame by means of a conventional crimping device.

Both rollers feed the cable to be crimped, consisting of many composite filaments, to the next stuffer box, which is not visible in this drawing.

The end faces 3 and 3' of the feed rollers 1 and 1' are precision machined and bearings so as to form a common surface.

One bearing 4 and 4' is seated on each end face of the feed rollers 1 and 1' or of the associated shaft, which bearings are connected to a ring-shaped adjustable sealing element 5 or 5'.

Due to their bearing condition, the sealing elements 5 and 5' do not have to follow the movement of the feed roller, but rather are fixed by suitable devices, for example pins.

The ends 6 and C of the ring-shaped packing element are machined with an accuracy of π, like the end faces 3 and 3' of the 7-ead roller.

In other words, these surfaces form flat surfaces.

A sealing plate 7 is attached to this surface formed by the end surfaces 6 and 6'.
can be crimped.

The sealing plate 1, which is shown inserted in the side part of the stuffer box 9, is pressed by screws onto the end faces 6 and 6' of the ring-shaped packing element.

However, with what force and by what method (spring, hydraulic means, etc.) the seal and the plate 7 are crimped is not important for the function of the press-crimping device according to the invention.

This is because the relative position of the sealing plate to the surfaces of the end faces 3 and 3' is clearly determined by the ring-shaped adjustable sealing elements 5 and 5'.

What is decisive for the function is the distance between the plane formed by the end faces 3 and 3' and the plane formed by the end faces 6 and 6'.

This distance is between the sealing plate 7 and the end faces 3 and 3' of the feed roller pair.
Determine the sealing gap between the

The size of the sealing gap is determined by the position of the sealing elements 5 and 5'.

It has proven advantageous to make the position of the packing element 5 relative to the bearing 4 or 4' adjustable and determinable in a manner known per se, for example most simply by means of an adjusting screw.

That is, the size of the sealing gap 8 between the surfaces of the end faces 3 and 3' and the surface of the sealing plate 7 can be optimally adjusted before the first start of operation of the push-and-crimp device.

The advantages of the device according to the invention are obvious as follows.

In the known push-in crimping device, the distance between the sealing plate 7 and the end face 3 or 3' must be adjusted again subjectively each time the plate is replaced.

That is, whereas the sealing plates were pressed against the surfaces of the end faces 3 and 3', in the apparatus of the invention the end faces 6 and 6' of the ring-shaped packing element were pressed against the surfaces of the end faces 3 and 3' before the start of operation of the apparatus. It is sufficient to make only one adjustment to the planes 3' and 3'.

This distance is maintained reproducibly with each replacement of the sealing plate and is completely independent of the crimping pressure of the sealing plate against the packing element and the thickness of this plate.

In the device according to the invention, since the distance (8 in the drawing) between the sealing plate and the end face of the feed roller is determined, the wear of the sealing plate due to wear against the rotating end face of the feed roller, which was unavoidable until now, does not occur.

Until now, in order to avoid damage to the end faces of the rollers, it was necessary to use sealing plates made of soft material, but other damage to the sealing plates caused by abrasion of the crimped material has been observed. Ru.

Since, in the sealing device according to the invention, no damage to the end faces due to wear occurs in the sealing plate, this plate can be made of a hard material, for example a sintered ceramic material; Damage actually occurs sooner rather than later.

However, if desired, a sealing plate made of a soft material, such as brass or bronze, may optionally be added to the device according to the invention, such as DOIS Patent Application Publication 1, Publication No. 195,986.
3 or DE 2117393 can also be used in an eccentric arrangement.

Even if soft materials are used for the production of the gap plate in the device according to the invention, a service life of at least several months can be achieved without the need for updating the quality of the crimped cable.

In addition, the replacement of the sealing plate in the device according to the invention is, of course, extremely simple and requires only a few tenths of the conventional assembly time.

This is because the sealing plate does not need to be adjusted at all.

[Brief explanation of the drawing]

The drawings depict one embodiment of the invention. Explanation of the main symbols in the drawings: 1, 1...Feed roller, 2, 2'...Roller axis, 3, 3'...
...Roller end face, 4, 4'...Bearing, 5
, 5'... Packkin element, 6, 6'...
・End face of packing element, 7... Sealing plate, 9...
... Nutaffa Box.

Claims (1)

[Claims] 1 A pair of rotating feed rollers and a fixed staff for sealing the feed roller against the side wall of a stuffer box, which is provided with an adjustable sealing plate in the direction of the end face of the feed roller, especially in a push-crimping device. In the end face sealing device between the feed rollers 1 and 1', a sealing element 5 is provided in the end faces 3 of the feed rollers 1 and 1' at a position where the sealing plate 7 covers the gap between the feed rollers 1 and 1'.
, 5' are provided in pressure contact with the end surfaces 6, 6' of the
And these packing elements 5, 5' are connected to feed rollers 1, 1.
, characterized in that it is axially adjustable mounted on bearings 4, 4' of the rotary feed roller pair and the fixed stiffener box.