Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06J—PLEATING, KILTING OR GOFFERING TEXTILE FABRICS OR WEARING APPAREL
  • D06J1/00—Pleating, kilting or goffering textile fabrics or wearing apparel
  • D06J1/02—Pleating, kilting or goffering textile fabrics or wearing apparel continuously and transversely to the direction of feed
  • D06J1/06—Pleating, kilting or goffering textile fabrics or wearing apparel continuously and transversely to the direction of feed by reciprocating blades

Definitions

• the invention relates to a method for mechanically inserting and permanently fixing folds in fabrics, in which a fabric web with oscillating pleating knives is periodically placed in folds, the fold in each case is inserted into a nip of a calender and with heating at least one calender roller and Carrying through the nip is fixed, and on a device for performing this method.
• the object of the invention is therefore to provide a method and a device for mechanically inserting and permanently fixing folds in fabrics, in which it is not necessary to carry along a paper web together with the fabric web to be pleated.
• This object is achieved according to the invention in a method of the type mentioned at the outset by placing the still wrinkle-free web of material on a moving conveying surface of a transfer conveyor and carrying it along in the conveying surface to the immediate vicinity of the pleating knives, and by the movement the conveying surface is adapted at least in the area of the movement of the pleating knives close to the pleating knives in such a way that when the closed pleating knives are pushed into the roller gap on the conveying surface, the fabric web is driven at the same speed as the pleating knives and transferred to the pleating knives without tension becomes.
• a transfer conveyor for conveying is located directly in front of the pleating knives a fabric on a conveyor surface of the endless belt up to the transfer to the pleating knife and with means for Control of the drive speed of the endless belt of the transfer conveyor is provided.
• the fabric web is not driven during the return stroke of the opened pleating knives. Furthermore, it can be advantageous that the conveying surface of the transfer conveyor is lowered during the return stroke of the opened pleating knives from the supporting system on the fabric web. A variation in the combination of these options makes it possible to achieve the optimum feed for every fold shape and every knife stroke.
• the rolls forming the nip of the calender are briefly lifted from one another and brought together again when the fold formed by the pleating knives is introduced into the nip.
• This procedure has the advantage that the pleating knives do not have to press the fabric into the working gap of the calender with pressure.
• the rollers are moved together again, whereby the material to be pleated is gripped and compressed exactly in the area of the fold formed. Fixing the fold is done particularly gently and without the risk that the fold shape could be changed by pressing the folded fabric web into the closed calender roll nip.
• the device can be designed such that a deflection roller delimiting the conveying surface on the pleating knife side is displaceably mounted and that means are provided for essentially horizontal movement of the deflection roller on the pleating knife side in coordination with the oscillating movement of the pleating knives, so that the gap between the conveying surface of the transfer conveyor for the wrinkle-free web to be guided and the pleating knives can be kept small at all times.
• This development of the invention aims to ensure that the advantage of supporting and taking the fabric web according to the invention into the immediate vicinity of the pleating knives is greater the closer the fabric web can be brought to the pleating knives during the pleating process.
• This can preferably be achieved by the action of pneumatic cylinders on the axes of the pleating knife-side deflection roller, which are controlled in accordance with the knife movement.
• a fabric pressure roller can be provided above the transfer conveyor, with which the guided wrinkle-free fabric web can be pressed onto the essentially horizontal conveying surface at least in a partial area.
• the endless belt which is preferably a felt belt, is either moved by the important of a tension pulley or tensioned by a tension roller held by springs.
• the drawing shows the essential parts of the invention of a device 1 for machine insertion and permanent fixing of folds without the use of idler paper schematically in cross section.
• the exemplary embodiment shown comprises a transfer conveyor 10, in which a felt belt designed as an endless belt 12 is guided over three deflection rollers 14, 16 and 18, between the two deflection rollers 14 and 16, which are arranged approximately at the same height a section of the endless belt 12 spanned as a conveying surface 19 for a wrinkle-free fabric web resting on the endless belt 12 in this section.
• the deflection roller 14 is designed as a simple deflection roller, while the deflection roller 16 via two pneumatic cylinders 20, of which only the front one is shown, whose piston rod on the axis ends of the deflection roller 16 on the one hand and on the frame of the transfer conveyor (not shown in the drawing) 10 attack on the other hand, slidably mounted and thereby movable.
• the third deflection roller for the endless belt 12 is a tension roller 18 which holds the endless belt 12 tensioned independently of the respective position of the movable deflection roller 16. In the example shown, the tensioning pulley 18 acts through its own weight.
• a wrinkle-free material web which lies on the conveying surface 19 of the endless belt 12, is fed with the driving speed of the endless belt 12 to the pleating knives 22 and 24 arranged immediately behind the transfer conveyor 10.
• the deflection roller 16 closest to the pleating knives 22 and 24 and movable by the pneumatic cylinders 20 serves at the same time as a drive roller for the tubularly formed Continuous belt 12.
• a calender 30 with heated rolls 32 and 34 and a felt belt 36, which is pressed against the lower calender roll 32 by a further tensioning roll 38.
• a fabric pressure roller 40 which presses the fabric web to be fed to the pleating knives 22 and 24 onto the conveying surface 19 of the endless belt 12 and thus ensures that the fabric web cannot move on the conveying surface 19, but rather without relative movement ⁇ movement between the two moves on the driven endless belt 12.
• the drive speed of the endless belt 12 and thus the fabric web resting on the conveying surface 19 is controlled by the deflection roller 16 so that the fabric web when the closed pleating knives 22 and 24 are pushed into the gap between the circulating felt belt 36 and the heated calender rolls 32 and 34 is driven with the speed of the feed of the pleating knives 22 and 24, so that a completely tension-free tracking of the fabric is ensured.
• the deflection roller 16 When the opening pleating knives 22 and 24 are retracted, the deflection roller 16 is also retracted in the opposite direction by the pneumatic cylinders 20 in accordance with the retraction speed of the pleating knives 22 and 24.
• the conveying surface 19 yields in front of the pleating knives 22 and 24 in accordance with the retraction of the deflection roller 16 on the side of the pleating knife, so that the gap between the pleating knives 22 and 24 and the support of the fabric web by the conveying surface 19 are always kept uniformly small and thus a unwanted sagging or distortion of the
• the endless belt 12 is driven - likewise via the deflection roller 16 - at a feed speed which provides the appropriate length of fabric for the fold to be inserted and the stroke of the pleating knives 22 and 24 adapted to it.
• the feed is during the retraction of the pleating knives 22 and 24 of the endless belt 12 is equal to the speed at which the folded fabric web is continued between the lower calender roller 32 and the felt web 36.
• the rollers 32 and 34 are lifted off from one another briefly so that the pleating knives do not press the fabric into the working nip have to impress.
• the rollers 32 and 34 are moved together again, grasp the material to be pleated exactly in the area of a fold formed and press the fold together so that they act under the action of heat and pressure is fixed.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatment Of Fiber Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6485713

Family Applications (1)

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Cited By (1)

Families Citing this family (1)

Citations (1)

Family Cites Families (1)

• 1993
  • 1993-04-17 DE DE19934312582 patent/DE4312582A1/de not_active Withdrawn
• 1994
  • 1994-03-17 WO PCT/EP1994/000851 patent/WO1994024357A1/de active Application Filing
  • 1994-04-09 TW TW83103129A patent/TW266235B/zh active

Patent Citations (1)

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