DE1002501B - Device for the production of threads from thermoplastic materials by the ribbon melt spinning process - Google Patents

Description

LIBRARY DESDEUTSGHEN

In the preparation of threads The sliver is made from thermoplastic materials, such as polyamides, using the sliver melt spinning process fed to the melting chamber with the help of conveyors and guides.

So that the heat from the melting room cannot radiate to the feed device, one already has proposed between the last guide point of the feeder and the entrance of the Melting space to leave a free distance so that the feed device is not heated, which the Operation would be difficult, and also the sliver is not heated too early. As a result of the free Distance between the feed device and the entrance of the melting chamber can be leaked Easily remove the melt and crusts at the opening of the sliver insert into the melting chamber.

However, there is a disadvantage of the free distance between the feed device and the melting chamber in the fact that when piecing or when inserting a new tape - when a tape is almost used up is - a guide of the belt to the entrance of the melting chamber is missing.

It is already known to use two pairs of pressure rollers to regulate replenishment in the bar melting process to use, the first of which with greater peripheral speed revolves around as the one adjacent to the melting chamber and in which. a role of the latter Pair is under higher spring pressure than the corresponding one of the first pressure roller pair. These However, training is only suitable for rigid rods, which the free distance between the last Run through the guide organ and the melting chamber without any external guidance.

In the ribbon fusing process, however, serious problems arise due to the poor rigidity of the ribbon Difficulties, especially when piecing, which the known device does not eliminate can be. According to the invention, the problem in the strip melting process is solved in that a Auxiliary device is provided for bridging when piecing and replacing the sliver the free distance between the feed device and the melting chamber can be used. The inventive Device proves to be particularly effective when for the promotion of the sliver only a single pair of rollers is provided.

The auxiliary guide device according to the invention can be fixed, but pivotable or removable, be arranged either on the spinning head or on the fixed tape guide device or the like. she must only be able to be easily brought into or out of the working position.

A fastening method that works particularly well

Device for the production of threads

made of thermoplastic materials according to the

Ribbon melt spinning process

Applicant:

NV Onderzoekingsinstituut Research,
Arnhem (Netherlands)

Representative: Dr. K. Sdxwarzhans, patent attorney,
Munich 38, Romanplatz 9

Claimed priority:
Netherlands 4 January 1952

J. W. IJ. Heijnis and Dipl.-Ing. C. Engels, Arnhem

(Netherlands),
have been named as inventors

has the following characteristics: as The lower end of the fixed tape guide device and the upper part of the auxiliary guide device are grooved in such a way that the latter can be inserted into the direction of the two narrow sides of the sliver such as a slide or a drawer slide the lower part of the fixed tape guide.

The auxiliary device can consist of one or more parts. Preferably there is the auxiliary device out of one piece.

If you use the auxiliary device for piecing and changing the tape, is due to the proximity of the spinner head, they get quite hot in a short time. It is therefore advisable to to keep the auxiliary device away from the heat-emitting parts when not in use. It is also beneficial the auxiliary device with a heat-insulated handle, e.g. B. made of wood.

With reference to the drawing there follows a description of an exemplary embodiment of FIG device according to the invention.

Fig. 1 is a bottom plan view of the apparatus of the invention;

Fig. 2 is a front view;

Fig. 3 shows a detail of the tape guide device on an enlarged scale;

Fig. 4 shows in perspective the auxiliary guide device according to the invention in natural size.

The fixed tape guiding device consists of two plates 1 and 2, which are secured by bolts 3, 4 and 5, 6, respectively

609770/344

are connected and are held at a distance by sleeves around these bolts.

The sliver 7 moves between the plates 1 and 2, being arranged in these plates Grooves 8 and 9 get the guide.

The promotion of the sliver 7 takes place with the help of two rollers 10 and 11 which, for. B. over a sliding clutch can be driven.

The plates 1 and 2 have recesses in the middle 12, which interrupt the grooves 8 and 9 in the plates 1 and 2.

The movement of the sliver 7 can be observed through these recesses 12 in the plates 1 and 2.

At the ends of the grooves 8 and 9, widenings 13 and 14 are provided to facilitate the introduction of the Sliver 7 to facilitate.

The plates 1 and 2 have at their lower end such a profile 15 and 16 that you can use the auxiliary device 17 can easily slide onto it.

Fig. 2 shows this profile. On both sides of the plates 1 and 2, grooves 18 and 19 are incorporated. The auxiliary piece 17 has guide grooves 20 and 21 (Fig. 4), with which it is on the profiled lower Ends 15 and 16 of plates 1 and 2 can be pushed. The auxiliary piece 17 is also with a Tape guide slot 22 is provided, which corresponds to the one formed by the grooves 8 and 9 in the plates 1 and 2 Corresponds to guide slot. The auxiliary piece 17 also has a handle 23 which is insulated from heat.

The tape guide slot 22 in the auxiliary piece 17 is provided with ends 24 and 25. After this the auxiliary piece 17 is inserted, the lower end 26 of the auxiliary piece is immediately above the expansion 27 of the inlet opening 28 of the melting space 29, in which the tape. 7 introduced will.

When a new sliver is introduced, the auxiliary device is pushed in. This does not happen only during the first piecing, but also during operation, when the old sliver has almost run out is. The new tape is then fed from above through the upper guide point of the fixed tape guide device inserted and guided down until the tape is taken along by the friction rollers will. Here you can see through the slots 12 to ensure that the new sliver is then is gripped on the old sliver by the conveyor rollers.

The device according to the invention facilitates piecing to a considerable extent and guides the introduction of the tape that, in view of the necessity, the ends of the stubborn tapes at Bringing them into the melting chamber smoothly against each other has previously cost a lot of effort on some just a few steps back, as the sliver ends are already in lie in a line.

Claims (3)

Patent claims: 1. Device for the production of threads from thermoplastic materials, such as polyamides, according to the sliver melt spinning process, in which the sliver is conveyed by means of conveyors and guides is fed to the melting chamber and between the last guide point of the feed device and there is a free distance to the entrance of the melting chamber, characterized in that an auxiliary guide device (17) is provided for bridging when piecing and replacing the sliver (7) the free distance between the feed device (10, 11) and the melting chamber (29) can be used is. 2. Apparatus according to claim 1, characterized in that the auxiliary guide device is attached to the melt spinning device. 3. Apparatus according to claim 1 or 2, characterized in that the lower end of the fixed tape guide device (1, 2) and the upper part of the auxiliary guide device (17) such are grooved that the auxiliary guide device in the direction of the two narrow sides of the sliver slide-like on the lower part of the fixed tape guide device is slidable. Considered publications:
German patent specification No. 721 687. 1 sheet of drawings © 609 770/344 2.