Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
  • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
  • D01G15/92—Attaching card clothing to carding elements

Definitions

• the present invention relates to a device for pulling a carding machine onto a roller with a roller drive unit and a braking device acting on the carding machine for generating a winding tension in the area of the carding machine between the roller and the braking device.
• Garnished carding rolls are produced by winding a type of saw tooth wire onto a roll base.
• the sawtooth wire lies flat on a supply spool.
• the device pulls the carding mechanism out of this supply spool.
• the sawtooth wire is fastened with its free end region to an outer circumferential piece of the basic roller body and is guided through a braking device at a distance from the basic roller body.
• the roller base is driven by a regulated drive motor.
• the braking device consists of brake shoes pressing on the sawtooth wire with spring pressure on the side, so that there is always a certain pre-tension between the braking device and the roller body in the carding mechanism during the winding process. This device has also been used by the applicant for years and has proven itself well. However, efforts are still being made to bring about an improvement here.
• this object is achieved in that a force measuring device is provided which measurably measures the action of force on an attachment point of the braking device essentially along a pulling direction of the carding assembly. is. Due to the fact that the prestressing force is applied in the pulling-on direction of the carding assembly, a force measurement is carried out according to the present invention in exactly this direction or parallel to it. The measured force therefore provides direct information about the pretension applied to the card clothing. No conversions are required, as is the case with indirect determination via current consumption of the motor driving the roller, etc. Force measuring devices are commercially available in many different forms, so that they can be used for a wide variety of mounting locations. The braking device must be attached at any point, for example on a machine frame.
• a variant with a very simple design provides that the braking device is arranged on a slide construction that is essentially movable along the pulling direction of the card assembly against a stop device, the force measuring device being designed to measure the support force of the slide construction on the stop device at least during a pulling operation.
• the slide construction tends to shift due to the prestressing force. However, this is prevented by the stop construction.
• the force that the slide construction exerts on the stop device is then measured and is a direct measure of the pretensioning force.
• the slide construction and the anchor device There are many different options for designing the slide construction and the anchor device.
• the sled construction could also act against a spring.
• the slide construction should preferably be designed in such a way that as little as possible other force influences act on it besides the displacement force.
• strain gauge force transducer as a force measuring device is a particularly robust embodiment. This strain gauge force transducer is able to transmit and measure the required forces. In addition, it is a commercially available product that is very easy and inexpensive to obtain for the intended purpose.
• At least a part of the force measuring device can preferably be arranged between the slide construction and the stop device. The entire force is then passed through this part of the force measuring device and is available for the measuring process.
• the carriage construction can be moved very smoothly in that the carriage construction comprises at least one ball bushing guided on at least one cylindrical rod.
• Such ball bushings with associated rod guides are standard components that are also very easy to obtain.
• ball bushings can also compensate for tilting forces to a certain extent, so that the slide guide does not necessarily have to run in one plane with the carding set. The smooth running of the guide ensures that the force can be measured without additional influences and losses.
• the braking device can comprise brake shoes which can be acted on the carding assembly and which have at least one brake lining made of a ceramic material.
• Tungsten carbide brake shoes have been used to date. The inventor has now recognized that the use of ceramic materials in the mounting process again brings about an improvement. At this point it should be noted that the subject matter of claim 6 could also enjoy protection independently of claim 1.
• a recording device can be provided which, at least in some areas, is designed to record the force profile measured by the force measuring device during the pull-up process. This makes it possible to document the mounting process and to understand whether the necessary preload was generated over the entire mounting process. This can be trade a data logger that can be removed after the winding process and output elsewhere. As a result, the device remains insensitive to the very dirty work environment.
• the data logger can be connected to a dynamo, which is driven by a rotating component of the device at least during the pulling-on process and the data logger is designed to be able to be supplied with current.
• battery operation of the data logger is advantageous in many cases.
• most batteries should be able to withstand the rather long wind-up processes, provided the battery volume is to be kept within limits.
• Support can also be provided here, e.g. be provided via a dynamo. It is also possible to provide the power supply exclusively via a dynamo, if necessary using a capacitor as a buffer memory.
• the dynamo is preferably driven in the immediate vicinity of the measured value acquisition. A drive of the dynamo could therefore e.g. by the carding mechanism leading guide rollers as part of or in the vicinity of the braking device.
• the recording device is designed to record the winding speed during the winding process.
• the winding speed is a further process parameter, which reflects a decisive role for the quality of the installed carding set. It is also possible to record the temperature in the braking area using a temperature sensor and also to incorporate this data.
• the braking device comprises a control and / or regulating unit, by means of which the braking effect can be automatically adapted to the winding tension, then the data recorded can be used for the control or regulation of the braking device.
• the roller drive unit can be integrated in the control and / or regulating circuit of the control and / or regulating unit, and the roller drive unit can be controlled or regulated when it is automatically adapted to the predetermined winding tension.
• Figure 1 is a schematic representation of a winding device in a
• Figure 2 shows a braking and guiding device as used in a winding device according to Figure 1 and
• Figure 3 is a schematic plan view of the braking and guiding device
• the winding device 1 shown in FIG. 1 essentially comprises a holding station 2 for a supply reel 3, on which a sawtooth-shaped card gauze is wound flat, a braking and guiding device 5 and a roller 6.
• the roller 6 is driven by a motor 7 and a transmission device 8 driven clockwise.
• the motor 7 has a control and regulating device 9, whereby the speed of the roller 6 and the direction of rotation can be controlled.
• the braking and guiding device 5 comprises a control and regulating device 10, which ensures a certain braking effect.
• the control and regulating device 9 and the control and regulating device are operatively connected to one another. In a further embodiment, these can also be used as a unit for controlling both the braking and guiding device 5 and the motor 7.
• the sawtooth wire-shaped card assembly 4 is unwound from the supply spool 3 arranged on a bearing block 11, then passed through the braking and guiding device 5 and wound onto the outer circumference of the roller 6.
• the carding gear 4 then runs helically around the outer circumference of the roller 6 after the winding operation.
• the braking and guiding device 5 is shown schematically in FIG. 1 as a box. This is explained in greater detail with the aid of FIGS. 2 and 3.
• the braking and guiding device 5, in cooperation with the roller 6 and here in particular via the roller drive, the motor 7, should apply a pretension in the area 12 of the carding mechanism 4. This pretension ensures a uniform and permanent winding or unwinding of the card gauze 4.
• the braking and guiding device 5 shown in FIGS. 2, 3 comprises a pull-up arm 13 which has at one end a running guide 14 which is arranged on a rotor tube 15 so as to be axially displaceable. As a result, the winding arm 13 can be adjusted in accordance with the position to be wound on the roller 6.
• the pull-up arm 13 has a guide finger 16, which ensures an exact placement of the carding mechanism 4 on the roller 6.
• the guide finger 16 itself has an elongated hole 17, which in turn intersects an elongated hole 18 at the end of the pull-up arm 13, so that the guide finger 16 can be adjusted by means of a screw connection 19.
• the actual brake unit 20 is arranged in the vicinity of the rotor guide 14.
• the brake unit 20 has two brake shoes 21 which are displaceable relative to one another and each have a brake lining made of a ceramic material.
• One of the two brake shoes 21 is adjustable by means of a spring 22 and an adjusting mechanism 23, so that the braking force can be adjusted.
• a so-called straightening unit 24 is provided as part of the brake unit 20.
• This straightening unit 24 has on one side three straightening rollers 25 with vertical axes of rotation and two opposing pressure rollers 26 with likewise vertical axes of rotation.
• the pressure rollers 26 are arranged so that they can be moved toward or away from the straightening rollers 25 by means of the adjusting screws 27. As a result, the clothing is given a desired orientation after passing through the brake shoes 21.
• the entire brake unit 20 is arranged on a slide construction 28.
• the sled construction 28 comprises a sled 29 which has a ball sleeve extension 30 on its underside.
• a ball sleeve 31 is arranged, which is arranged axially displaceably on a cylindrical guide rod 32.
• the slidability of the slide 29 over the ball bushing 31 and the guide rod 32 takes place essentially parallel to the carding mechanism guided by the brake unit 20.
• the guide rod 32 is arranged in a stop construction 33, so that the displacement path of the slide 29 is limited.
• a strain gauge force transducer 34 is arranged between the ball sleeve extension 30 and a stop surface of the stop construction 33. This strain gauge force transducer 34 is able to measure the displacement force of the brake unit 20 with which it is moved against the stop structure 32.
• the DMS force transducer 34 is firmly connected to the stop structure 33, while its slide is supported on the stop structure. Furthermore, the strain gauge force transducer 34 is coupled to the control and regulating devices 9 and 10, so that there is at least one display which tells the operator whether the desired pretension is being maintained. In a further embodiment, a recording device could also be provided, which documents the force curve accordingly. It is also possible to record the winding speed.
• the action and function of the mounting device is explained in more detail below.
• the carding gear 4 is withdrawn from the supply spool and passed through the brake unit 20.
• the card assembly is threaded between the brake shoes 21 and passed through the straightening unit 24.
• the guide finger 16 is adjusted so that it comes into engagement with the carding mechanism 4 on the roller 6, precisely at the point where it hits the roller 6.
• the beginning of the card assembly 4 is then connected to the roller 6, preferably welded.
• the braking force is then set via the setting mechanism 23.
• the adjusting unit 24 is brought into the correct position via the adjusting screws 27.
• the carding mechanism 4 slides through the set accordingly Brake shoes 21 through. Since this is done with friction, a force is exerted on the slide construction 28 by means of which the slide construction 20 is to be displaced. However, the slide is directly in contact with the stop structure 33 with the interposition of the strain gauge force transducer. The force is measured and is a direct measure of the pretensioning force in section 12 of the card assembly 4. A simple display could now indicate whether the pretensioning force is in the correct range of values. If this is not the case, the braking force must be released or tightened using the adjusting mechanism 23.
• the adjustment of the brake shoes 21 could also take place automatically, then the adjustment of the brake shoes 21 could be integrated into a control loop.
• a component of this control circuit could also be a temperature sensor, which measures the temperature of the card assembly in the area of the brake shoes 21. This then monitors whether an inadmissible heating of the carding set has occurred.
• a data logger can also be provided as the recording device, which is integrated in the braking and guiding device 5. This draws e.g. the force curve during the mounting process and can be removed after the mounting process and read out elsewhere.
• the data logger can preferably have a battery operation.
• support can also be provided for a power supply to take place via a dynamo, which can also be part of the braking and guiding device 5.
• a drive of the dynamo could e.g. via the straightening rollers 25 and pressure rollers 26.
• other preferably rotating parts of the mounting device, in particular the braking and guiding device 5 are also suitable for this.
• the complete power supply can also be carried out via a dynamo without the data logger running on battery power.
• the interposition of a storage capacitor would also be conceivable.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Braking Arrangements (AREA)
• Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
• Winding Of Webs (AREA)
• Treatment Of Fiber Materials (AREA)
• Manipulator (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=32049514

Family Applications (1)

Country Status (7)

Families Citing this family (6)

Family Cites Families (7)

• 2002
  • 2002-10-21 DE DE10249001A patent/DE10249001A1/de not_active Withdrawn
• 2003
  • 2003-09-11 WO PCT/EP2003/010128 patent/WO2004035886A2/fr active IP Right Grant
  • 2003-09-11 AT AT03788900T patent/ATE380896T1/de not_active IP Right Cessation
  • 2003-09-11 EP EP03788900A patent/EP1554418B1/fr not_active Revoked
  • 2003-09-11 CN CNB038227967A patent/CN100412244C/zh not_active Expired - Fee Related
  • 2003-09-11 US US10/531,646 patent/US7360735B2/en not_active Expired - Fee Related
  • 2003-09-11 ES ES03788900T patent/ES2297256T3/es not_active Expired - Lifetime
  • 2003-09-11 DE DE50308811T patent/DE50308811D1/de not_active Expired - Fee Related

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events