DE547745C - Spinning cell for dry spinning processes - Google Patents

Description

GERMAN EMPIRE

ISSUED ON APRIL 6, 1932

REICH PATENT OFFICE

PATENT LETTERING

CLASS 29a GROUP

29 a A 256th day of the announcement of the grant of the patent: March 17th

Aceta G. mb H. in Berlin-Lichtenberg Spinning cell for dry spinning processes

Patented in the German Empire on November 9, 1930

The dry spinning process is used to manufacture synthetic threads closed heated spinning cells in which the threads are dried out by a Flow of a gaseous medium takes place. The movement of this gas stream can dem The thread run may be directed in the opposite direction, but it can also take place in the same direction as this. In the former case, the drying gas laden with solvent vapor occurs at the upper end the spinning cell off; in the other case the suction takes place below in the area of the thread exit. In general, the temperature of the suctioned drying gas is depending on

* 5 The spinning cell is heated more or less above room temperature.

For reasons of thermal economy and other reasons, it is desirable to precede the exhaust gas to its entry into the main suction line the excess heat as far as possible revoke. This is especially true when some of the solvent vapors condense is worked by cooling in the circuit.

The invention relates to a spinning cell for dry spinning from top to bottom in one gas stream moving in the same direction as the filaments. A solution to the task at hand is achieved in a simple and economical way that only a lower Cell part by a special Heizvorrich device, z. B. by one of steam or of a heating jacket with a hot liquid flowing through it or an electrical resistance heater, is heated relatively strongly, while for heating an upper part the hot one at the lower end exiting drying gas is used, which is in an outer double jacket on the cell wall is guided along. After exiting the cell, this exhaust air is expediently first on the outer heating surfaces bypassing the lower heater, adding another amount of heat records. The heat dissipation between the top of the spinning cell and the heating jacket as well as between the radiator and the lower outer jacket can be made easier by the fact that the partition walls are completely or partially provided with heating ribs and the like.

By appropriately dimensioning the heating surface in the upper and lower part of the cell the heat distribution in this and thus also the drying process of the threads are largely influenced. If you want one in particular in the uppermost part of the spinning cell To maintain a low temperature, it is best to put the outer coat on first to start a little below the shaft head.

An example embodiment of the spinning cell is shown schematically in FIG Drawing reproduced. The details of the device are based on the following Ar- 6g explained by way of example.

The spinning solution is pressed through the tube and the filter candle b to the nozzle and leaves it in the form of filaments d which pass through the cylindrical spinning cell e from top S to the bottom and leave it again at the lower end through a nozzle-like opening f . The drying air required to absorb the solvent vapors flows from the collecting line g through a heater A into the chamber i, then enters the spinning cell through the holes k and flows down in the same direction as the threads.

Around the lower part of the spinning cell is the jacket / connector with inlet and outlet for the heating fluid. This is surrounded by a second, externally insulated jacket m, through which the dry air laden with solvent vapor and exiting the spinning cell ß at η flows. This dry air is heated even further by contact with the outer surface of the heating jacket / and then gives off heat to the upper part of the spinning cell on its way through the narrower upper part of the outer jacket m _L. The heat dissipation is facilitated by the ribs ο running around the cell, for example in the helix. The gas, which has gradually cooled down to around room temperature, is sucked off through the nozzle ρ into the manifold q , which leads to a condenser, not shown in the drawing, in which part of the solvent vapors is precipitated, while the remaining gas mixture is returned to the main manifold g ' will.

Claims (3)

Patent claims: i. SpinnzeEe for dry spinning processes in which the drying air flows with the threads from top to bottom, characterized in that the lower part of the spinning cell is enclosed in a jacket-like manner by a heating element (/), while an upper part is surrounded by a jacket space (m _t ), which is connected to the gas outlet at the lower end of the spinning cell. 2. Spinning cell according to claim 1, characterized in that. a jacket space (m ) placed around the heating jacket (/) without intermediate insulation, which receives additional heating and establishes the connection between the lower gas outlet point («) of the spinning cell (e) and the upper heating jacket (m _L ). 3. Spinning cell according to claim 1 and 2, characterized in that the upper part of the cell surrounded _{by a jacket (/ K 1} ) and the heating element (I) are equipped on the outside with heating ribs (o) or the like. 1 sheet of drawings