DE102022002755A1 - Heated godet for transporting and heating a synthetic thread - Google Patents

Abstract

The invention relates to a heatable godet (100) for transporting and heating a synthetic thread, which has a rotatable jacket (3) for transporting the synthetic thread and an induction heating device (9) for heating the jacket (3), the induction heating device being adjacent to the jacket (3) is arranged on a stationary support arm (60), a temperature fuse (5) being arranged in the heating area (H) of the induction heating device (9), and the invention relates to a drafting system with at least one heatable godet (100) according to the invention.

Description

The invention relates to a heatable godet for transporting and heating a synthetic thread according to the preamble of claim 1.

Heated godets are generally known from the prior art.

DE 196 13 433A1 discloses a heatable godet or roller for heating thread-, tape- or web-shaped material. The roller or godet has at least one induction heater in its jacket. The induction heater is attached to a stationary support arm adjacent to the jacket and the jacket is rotatably arranged around the induction heater.

Sensors and corresponding monitoring units are generally provided for monitoring the temperature in the heatable godet.

These sensors are also scanned. In addition, fuses are provided in a separate control cabinet for the control and regulation of the induction heating device.

These fuses must meet certain certifications and are very expensive to purchase. The fuse must ensure that in the event of a fault in the induction heater and the associated heating units, an unregulated, permanently 100% heating output is caused in the jacket.

There must be no danger to the environment and the operators working with the godet. In particular, incorrect heating of the godet should be prevented. To ensure this, additional certified electronic components are required in the control cabinet, which can result in high costs.

For example, it was found in tests in which a fault was simulated that a jacket temperature above 550 ° C can occur. This temperature can cause damage to the jacket and the associated components, as this temperature is in the tempering range of the steel commonly used for the godet jacket, which can lead to a reduction in strength.

It is therefore the object of the invention to provide a cost-effective and yet safe heatable godet for transporting and heating synthetic threads, which reduces and/or at least partially prevents the disadvantages mentioned above.

The object is achieved according to the invention with a heatable godet for transporting and heating a synthetic thread with the features according to claim 1.

According to one aspect of the invention, a heatable godet for transporting and heating a synthetic thread is provided, which has a rotatable jacket for transporting the synthetic thread and an induction heating device for heating the induction jacket, the induction heating device being arranged adjacent to the jacket on a stationary support arm, wherein a temperature fuse is arranged in the heating area of the induction heating device.

A synthetic thread is understood to mean any thread or filament that can be produced from a synthetic melt by extrusion from a spinneret. The synthetic thread may comprise a plurality of filaments or a single filament. In the latter case one speaks of a monofilament.

A temperature fuse is any suitable fuse that triggers in the event of extreme increases in temperature and, for example, interrupts the power supply to the induction heater.

The heating area of the induction heating device is to be understood in particular as the area which is heated to heat the jacket of the heatable godet, so that the jacket of the heatable godet is heated sufficiently to heat the synthetic thread to the desired temperature, for example for relaxation.

In addition, in the heating area, the heating power of the induction device can range from 4 to 10 kW, which is sufficient for sufficient heating of the synthetic thread if the jacket is made of the appropriate steel or other heat-conducting material and / or suitable alloy.

According to one embodiment of the heatable godet, the support arm of the induction heating device is fixed in place on a support, with the drive shaft of the rotatable jacket being arranged in the support arm.

A carrier is here understood to mean a part of the device on which the heatable godet is mounted, for example a winder for winding the synthetic threads produced, the godet being part of a drafting system and / or a pulling device via which the synthetic thread is drawn off from a spinneret towards the winder.

Such godets can also be provided for a stretching and relaxation unit of the winder. The heatable godet can be used to transport and process so-called FDY yarns (Fully Drawn Yarn).

According to one embodiment of the heatable godet, the heating area of the induction heating device is limited by the inside of the jacket and the support side of the support arm. A heating area is to be understood in particular as the area of the induction heating device which is heated due to its heating output.

This is in particular the area that is arranged adjacent to the godet jacket by the induction heating device. The induction heating device and the godet jacket must be arranged at a distance from one another so that on the one hand the induction heating device can generate the necessary heating power and on the other hand the rotatable jacket of the godet can provide the function of transporting or, in combination with another godet, stretching the synthetic thread to be conveyed.

According to one embodiment of the heatable godet, the induction heating device has a coil winding made up of a coil, the coil winding having different coil positions depending on the position in the jacket.

The induction heating device is in particular a coil heater whose coil winding is wound on a stationary support. The coils preferably induce the godet jacket and ensure its heating, so that the synthetic thread can be relaxed by the increased temperature, so that the polymer chains in the filament can be better arranged essentially in a straight line by subsequent stretching.

Preferably, more coil layers are wound one on top of the other in those places, especially on the edge layers of the godet, where greater cooling is to be expected and therefore a greater heating output of the induction device is required.

According to a preferred embodiment of the heatable godet, the temperature fuse is arranged in the heating area of the induction heating device, in particular where the highest temperature occurs.

The temperature fuse can be activated by means of the temperature present in the heating area, so that the power supply is safely switched off if a predetermined limit value is exceeded.

The temperature fuse can therefore be arranged in the optimal position for securing the heating area in the heatable godet without further sensors or controls, in particular in the heating area between the rotatable jacket and the stationary induction heating device.

According to a preferred embodiment of the heatable godet, the temperature fuse is arranged in, on, between and/or at a distance adjacent to the coil windings of the induction heating device.

The temperature fuse is arranged in particular in the heating area of the induction heating device. So that the temperature fuse can interrupt the power supply or the power supply to the heating coils, the temperature fuse is arranged in the coil path of the heating coils, so that it can also safely interrupt the current flow when activated.

The position of the temperature fuse can be provided in the coil path above the coil path, between the coil path or at a distance from the coil winding adjacent to the rotatable jacket of the godet, in which case there must be a minimum distance between the temperature fuse and the rotatable jacket so that the temperature fuse does not move away from it rotating casing is damaged or blocked.

According to a further embodiment of the heatable godet, the temperature fuse is arranged on and/or on the inside of the jacket. As already mentioned in the previous embodiment, the temperature fuse must be arranged with a corresponding minimum distance from the rotatable jacket so that it does not block the rotation of the jacket.

The temperature fuse may be in some degree of contact with the jacket to better measure and sense its current temperature, but must not block its rotation. Appropriate plain and/or roller bearings can be provided for this so that the temperature fuse can come into contact with the rotating jacket with appropriate protection.

According to a special embodiment of the heatable godet, the temperature fuse interrupts the electrical power supply to the induction heating device at a predetermined temperature range in the heating area of the jacket.

If the temperature range of the induction heating device indicates a fault and the temperature is too high, the temperature fuse is triggered. When triggered, the electrical power supply is immediately interrupted, so that no further heating of the godet jacket can be carried out because the corresponding energy supply is interrupted.

According to a further embodiment of the heatable godet, the temperature fuse reversibly and/or irreversibly interrupts the electrical power supply to the induction heating device.

In the event of a reversible interruption, it is possible to restore the power supply via the temperature fuse without having to remove the temperature fuse in the godet.

In the event of an irreversible interruption, it is necessary that at least the godet jacket is removed so that access to the temperature fuse is possible and this can be replaced with a new temperature fuse.

According to a special design of the heatable godet, the temperature fuse is set up to interrupt the electrical power supply in a temperature range of approximately 220 ° C to 300 ° C.

The temperature range also depends on the galette to be used. Depending on which yarn is to be produced, such as an FDY and/or an IDY, other temperature ranges are required. For a godet for the production of FDY the temperature range is 220°C to 250°C, for a godet in the IDY range the temperature range is slightly higher at around 270°C to 300°C.

According to a preferred embodiment of the heatable godet, the temperature fuse has a fuse, a PTC thermistor and/or a switching fuse. The fuse is an irreversible temperature fuse that must be removed after it is triggered and replaced with a new one. With a thermistor and a switching fuse, it is possible, after tripping, to reversibly bring the fuse back into a current-carrying state either by cooling the thermistor and/or by switching the trigger switch to its original position.

According to a preferred embodiment of the heatable godet, the temperature fuse is connected to an error reporting device which reports an error message to a controller when the temperature fuse interrupts the circuit.

This error reporting device can be an indirect and/or direct device that detects the triggering of the temperature fuse. For example, a power interruption can be detected, which is then reported to the controller or the control system so that the necessary steps, such as switching off the entire system, can be recognized.

According to a further embodiment of the heatable godet, the temperature fuse is set up to release the electrical power supply again after a predetermined time, after a release message from the control, after an activation and / or after an exchange.

The task is also fulfilled with regard to a drafting system which is provided with a heatable godet according to the previously presented configurations.

According to a special design of the drafting system, the temperature protection is connected to the control of the drafting system.

A control means a control device and/or a control system that controls and/or regulates the operation of the heatable godet and the associated induction heating.

The heatable godet according to the invention is explained in more detail below using a few exemplary embodiments with reference to the attached figures. This results in additional advantages of the already presented embodiments of the heatable godet.

• 1 eine schematische Schnittansicht einer beheizbaren Galette, wobei oberhalb der Schwerachse ein erstes Ausführungsbeispiel der Temperatursicherung gezeigt ist und unterhalb der Schwerachse ein zweites Ausführungsbeispiel der Temperatursicherung gezeigt ist,
• 2 eine perspektivische Ansicht der Spulenwicklung der Galette aus 1,
• 3 eine schematische Teilschnittansicht einer beheizbaren Galette für die Herstellung von IDY-Garnen, mit unterschiedlichen Ausführungsbeispielen und Positionen der Temperatursicherung, die jeweils in Längs- und in Schwerachsenrichtung zueinander getrennt zu betrachten sind, und
• 4a und 4b Schnittansichten bzw. Draufsichten der Spulenwicklung gemäß Schnitt I-I aus 3 und Schnitt II-II aus 3

In the drawings show:

• 1 a schematic sectional view of a heatable godet, with a first exemplary embodiment of the temperature fuse being shown above the center of gravity and a second exemplary embodiment of the temperature fuse being shown below the center of gravity,
• 2 a perspective view of the godet coil winding 1 ,
• 3 a schematic partial sectional view of a heatable godet for the production of IDY yarns, with different embodiments and positions of the temperature fuse, which are to be viewed separately from one another in the longitudinal and heavy axis directions, and
• 4a and 4b Sectional views or top views of the coil winding according to section II 3 and section II-II 3

1 shows a schematic partial sectional view of a heatable godet, for example for the production of FDY yarns (fully drawn yarn).

How out 1 As can be seen, the heatable godet 100 has a jacket 3 which is attached to a drive shaft 4 by means of a fastening element 12. The fastening element 12 borders on the front section 18 of the jacket 3.

The drive shaft 4 rotates the jacket 3 about the center of gravity S at a suitable speed and direction, so that a synthetic filament, not shown, to be transported can be guided to another godet and / or removed.

The inside has the reference number 20 and the outside of the godet has the reference number 10.

In addition, the in 1 shown godet 100 an induction heating device 9, which has a first and a second coil winding 11.1 and 11.2, which are connected to one another in a current-conducting manner with a temperature fuse 5.

The temperature fuse 5 can trip when a predetermined temperature range is exceeded, which can range from 220 ° C to 300 ° C depending on the type of godet, and interrupt the power supply to the induction heating device 9.

An interruption of the power supply means an interruption of the circuit and thus an interruption of the heating effect of the induction heating device 9.

The coil 11 of the first coil winding 11.1 and the second coil winding 11.2 is wound on a stationary support arm 60, which can be formed in one piece with a carrier 6. The carrier 6 can be part of a winder arrangement on which the heatable godet 100 is arranged. However, there are also exemplary embodiments in which the godet 100 itself has a suitable support arm that is not fixedly connected to the associated winder, so that the godet 100 can be completely removed.

In the in 1 In the embodiment shown, the induction heating device 9 is formed by a heating coil 8 which has the corresponding first and second coil windings.

The heating coil 8 is provided with several coil layers n1 and n2, in particular at the edge regions of the godet 100 at the free end and at the end adjacent to the carrier 6, so that a correspondingly larger heating output can also be provided where greater cooling is to be expected.

Adjacent to the carrier 6, the jacket 3 forms a flange section 13.

Further is over 1 It can be seen that the temperature fuse 5 is displayed in the upper area of the swivel axis S as a fuse 1 and in the lower area of the swivel axis S as the PTC thermistor 2.

The fuse 1 trips when a predetermined temperature is reached and the power supply is caused by melting of the correspondingly designed line of the fuse 1. In the PTC thermistor 2, a temperature that is too high causes the current flow to be blocked, but this is reversible when it cools down sufficiently and allows current to be carried again.

In an exemplary embodiment not shown, the temperature fuse 5 can also be a switching fuse, which can be reversibly brought into a current-carrying state again when a corresponding switching device on the fuse is activated. This switching can take place either manually and/or remotely.

2 shows the heating coil 8 of the godet 100 1 in a perspective view. There it can be seen how, in particular, the temperature fuse connects the two first and second coil windings 11.1, 11.2 to one another and is arranged in such a way that when the temperature fuse is triggered accordingly, the current flow between the two windings 11.1 and 11.2 is interrupted.

To couple the temperature fuse 5 into the first and second coil windings 11.1, 11.2, corresponding connections 7 can be provided on the respective first and second coil windings 11.1 and 11.2, which allow the temperature fuse 5 to conduct current with the first and second coil windings 11.1 and 11.2 couple.

The connections 7 form a coupling 14 and can be designed as plug-in or bayonet connections, so that the temperature fuse 5 can be removed or replaced without destroying it.

The temperature fuse 5 can also be connected to the following via appropriate soldered connections, which can only be solved with suitable tools be connected to the coil windings 11.1 and 11.2.

3 shows another embodiment of the godet 100 for the production of IDY yarns (Industrial Drawn Yarn). This godet has several heating areas H1, H2 and H3, which have their own coil windings 11.1, 11.2 and 11.3, with their own power supply.

In the in 3 In the exemplary embodiments carried out and shown, each coil winding 11.1, 11.2 and 11.3 has its own temperature fuse 5. The temperature fuse can be a thermistor 2, a fuse 1 and/or a switching fuse.

Each heating area H1, H2, H3 shows exemplary embodiments for the arrangement of the temperature fuse 5 in the respective heating area H1, H2 and H3 above and below the center of gravity S.

For example, the temperature fuse 5 can be arranged on the coil layer as shown in the heating area H1. In the lower area of the center of gravity S, the temperature fuse 5 is arranged adjacent to the godet jacket 3 in the heating area H1 and runs above the coil winding 11.1.

The respective coil windings 11.1, 11.2 and 11.3 are each separated from one another by a separating web 66. In the exemplary embodiment below the center of gravity S there is a power connection between the heating winding 11.2 and 11.3 via the temperature fuse 5.

4 shows in a cross-sectional view and in a top view 4a according to section II 1 and in 4b according to section II-II 3 a possible arrangement of the temperature fuse in detail.

However, other arrangements of the temperature fuse 5 on and/or adjacent to the respective coil 11 are also possible.

In an exemplary embodiment not shown, the temperature fuse 5 can, for example, be arranged adjacent to the rotating jacket of the godet 100 so that contact between the temperature fuse and the inside of the godet 20 can take place.

Reference symbol list

1

Fusible fuse (temperature fuse)

2

PTC thermistor (temperature fuse)

3

coat, godet coat

4

drive shaft

5

Temperature fuse

6

carrier

60

Beam

66

Divider

7

Connection

8th

Heating coil

9

Induction heating device

10

Outside

11

Kitchen sink

11.1

first coil winding

11.2

second coil winding

12

Fastener, screw connection

13

flange section

14

coupling

18

forehead section

20

inside

100

Roller, galette

n1, n2

Coil location

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19613433 A1 [0003]

Claims (15)

Heated godet (100) for transporting and heating a synthetic thread, which has a rotatable jacket (3) for transporting the synthetic thread and an induction heating device (9) for heating the jacket (3), the induction heating device being adjacent to the jacket (3) is arranged on a stationary support arm (60), characterized in that a temperature fuse (5) is arranged in the heating area (H) of the induction heating device (9). Heated galette Claim 1 , characterized in that the support arm (60) of the induction heating device (9) is fixed in place on a support (6), the drive shaft (4) of the rotatable jacket (3) being arranged in the support arm (60). Heated galette Claim 1 , characterized in that the heating area (H) of the induction heating device (9) is limited by the inside (20) of the jacket (3) and the support side of the support arm (60). Heated godet according to one of the preceding claims, characterized in that the induction heating device (9) has a coil winding (11.1, 11.2) made of a coil (11), the coil winding (11.1, 11.2, 11.3) depending on the position in the jacket (3 ) has different coil positions (n1, n2). Heated godet according to one of the preceding claims, characterized in that the temperature fuse (5) is arranged in the heating area (H) of the induction heating device (9), in particular where the highest temperature occurs. Heated godet according to one of the preceding claims, characterized in that the temperature fuse (5) is arranged in, on, between and/or at a distance adjacent to the coil windings (11.1, 11.2) of the induction heating devices (9). Heated godet according to one of the preceding claims, characterized in that the temperature fuse (5) is arranged on and/or on the inside of the jacket. Heated godet according to one of the preceding claims, characterized in that the temperature fuse interrupts the electrical power supply to the induction heating device at a predetermined temperature range in the heating area of the jacket. Heated godet according to one of the preceding claims, characterized in that the temperature fuse reversibly and/or irreversibly interrupts the electrical power supply to the induction heating device. Heated godet according to one of the preceding claims, characterized in that the temperature fuse is set up to interrupt the electrical power supply in a temperature range of approximately 220 to 300° Celsius. Heated godet according to one of the preceding claims, characterized in that the temperature fuse has a fuse, a PTC thermistor and/or a switching fuse. Heated godet according to one of the preceding claims, characterized in that the temperature fuse is connected to an error reporting device which reports an error message to a controller when the temperature fuse interrupts the circuit. Heated godet according to one of the preceding claims, characterized in that the temperature fuse is set up, after interrupting the electrical power supply, to release the electrical power supply again after a predetermined time, after a release message and / or after an exchange. Drafting system for pulling off, transporting and heating a synthetic thread, which has at least one heatable roller or godet according to one of the above Claims 1 - 14 having. Drafting system Claim 15 , characterized in that the temperature fuse is connected to the control of the drafting system.

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