WO1997039173A1 - Raising or napping machine - Google Patents
Raising or napping machine Download PDFInfo
- Publication number
- WO1997039173A1 WO1997039173A1 PCT/IT1996/000076 IT9600076W WO9739173A1 WO 1997039173 A1 WO1997039173 A1 WO 1997039173A1 IT 9600076 W IT9600076 W IT 9600076W WO 9739173 A1 WO9739173 A1 WO 9739173A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drum
- rollers
- raising
- satellite rollers
- fabric
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C11/00—Teasing, napping or otherwise roughening or raising pile of textile fabrics
Definitions
- the present invention relates to a raising process of a woven or knitted fabric or a napping process of a woven or knitted fabric or of a composite fabric, for example a resinated cloth or similar continuous sheet material, with an improved control of the action performed by raising or napping satellite rollers of a rotating drum and a universal raising-napping machine.
- Modern universal raising machines are essentially composed of a rotating drum formed by a plurality of satellite or peripheral rollers that are driven in rotation at an adjustable speed in order to vary their peripheral speed by a small fraction above or below the peripheral speed of the drum and therefore of the fabric running over the satellite rollers.
- the outer cylindrical surface of the satellite rollers is covered with appropriate raising or napping fillets (coverings) chosen in function of the type of treatment to be carried out and of the characteristics of the fabric to be treated.
- the satellite rollers are covered with an appropriate raising covering, typically in the form of a tape supporting a plurality of metal needles having their points bent through a certain angle and having a population density and elastic characteristics chosen in function of the particular type of woven or knitted fabric to be treated.
- the orientation of the bent points of the needles of each raising roller may be such as to determine an angle of incidence functionally opposed to the direction of advancement of the fabric (counterpile action) or in the same direction of advancement of the fabric (pile action).
- the action of the single raising rollers may be of the same type or of an alternate type, for example of the type: ... pile/counterpile/pile/counterpile/ ... .
- the needles of few of the peripheral raising rollers may also have a blunt, ball or mushroom-shaped end instead of a point end for exerting a specific felting action of the pile raised by the other rollers of the drum and so forth.
- the same (universal) machine may also be used for slightly different purposes than pile raising and specifically for napping a certain fabric to produce a superficial finish typical of the flesh-side of a natural leather or for conferring to a woven cloth, for example a cotton cloth, a peculiar tactile characteristic.
- abrasive coverings may be in the form of an abrasive paper tape of a given granulometry that can be readily wound over the rollers.
- the mode of operation of the machine is similar whether the satellite rollers are equipped with needle type, raising fillets or with abrasive napping fillets.
- the pile raising or napping action exerted by the satellite rollers of the rotating drum of the machine may be such as to produce a certain permanent linear elongation of a fabric and a corresponding shrinking of its width (or height). Therefore, the guiding rollers of the fabric to be treated must be provided with organs for recovering the elongation eventually produced by the raising or napping process.
- the extremely critical character of the regulation of the relative peripheral velocity of the raising rollers as referred to the so-called "zero-point" is well known, as well as the choice of the type of raising fillets (configuration density and elastic characteristics of the needles) in producing a certain result on a fabric in a most satisfactory way.
- An excessive "grip” (interference) of needles acting in a counterpile mode may excessively weaken or even ruin a cloth, by decisively tending to tear off the pile in an excessive manner, while a too weak "grip” may fail to produce a satisfactory result.
- Another important aspect of this type of treatments is represented by a more or less disuniform effectiveness of the raising or napping rollers, due to a disuniform tension of the fabric running over the rotating drum. This may depend on a more or less marked engagement of the needles or of the abrasive particles of the raising-napping satellite rollers along the entire arc of engagement of the fabric with the drum, as a consequence of successive elastic tensioning followed by relieving of the fabric occurring along the arc of circumference over which the fabric runs over the drum.
- the machine of the invention eliminates such a hardly modifiable design choice by allowing a quick adjustment of this parameter that in the case of treatments carried out on fabrics or materials having a marked difference in weight may become extremely critical or anyhow difficult to compensate through the adjustment solely of other parameters.
- each satellite roller is rotatably and mounted on two "eccentric" hubs or bushes, respectively installed in dedicated coaxial holes of the two support flanges (commonly referred to as "stars") of the satellite rollers that form the drum.
- eccentric hub or bush is herein intended a rotatably mounted element having a hole or a recess housing a ball or roller bearing for rotatably supporting one end of a satellite roller that is offset with respect to the axis of rotation of the element.
- Each bush can be rotated within the hole of the "star" flange and is provided with a toothing that engages with the toothing of an idle or free stepped gear wheel mounted on the shaft of the drum.
- Each idle stepped gear wheel is provided by at least another toothing that engages with a gear of a regulation shaft.
- the regulation shaft is rotatably sustained in a support, solidly mounted on the shaft of the drum, and may be driven by an electric motor or by any other equivalent actuator.
- all the eccentric bushes that support the satellite rollers may be rotated synchronously and the eccentricity of the axis of the bearings of each raising roller determines a radial shift of the axis of all the satellite rollers.
- the separation distance between adjacent rollers may be varied between about 5 nm and about 30 nm, thus permitting a sensible modification (optimization ) of the napping raising action.
- Figure 1 is a schematic cross sectional view of the drum of a raising- napping machine, made according to the present invention
- Figure 2 is a simplified schematic, partially sectioned plan view of the machine's drum.
- the drum of a raising-napping machine is indicated as a whole with 1.
- the drum is constituted by a hollow shaft 2 horizontally supported on the bearings 3 and 4.
- Two flanges or stars members, respectively 5 and 6, support a plurality of raising-napping rollers 7 mounted on ball bearings 8 and 9 that, according to the invention, are set in respective eccentric bushes B1 , B2, ..., B3, B4, which are rotatably installed in holes or housings distributed along a peripheral circumference of the two flanges 5 and 6.
- the drum may be rotated by a belt transmission employing a drive pulley or through a demultiplied electric motor (gearmotor) 11, while each satellite roller 7 (raising or napping roller depending on the fillet used) is provided with its own drive pulley 10.
- a belt transmission employing a drive pulley or through a demultiplied electric motor (gearmotor) 11, while each satellite roller 7 (raising or napping roller depending on the fillet used) is provided with its own drive pulley 10.
- the fabric or the continuous ribbon of tape material to be treated 12 is guided over the revolving drum 1 by a pair of guide rollers, namely: an inlet 28 and outlet roller 29, respectively.
- the arc of circumference of the drum that is engaged by the running fabric may also be different (smaller) than the one shown in the example of Fig. 1 , where it is approximately equal to 270°.
- Two rotating brushes, respectively 30 and 31, are fitted in a zone of the revolving drum that is not engaged by the fabric 12. The two rotary brushes strip the residues of pile that are inevitably teared off by the needles of the raising rollers. The pile residues are continuously sucked into the mouth of a vacuum hood or conduit of pile fragments a suction system (not shown in the figures).
- the machine is equipped in such a way to allow to synchronously vary the radial position of all the raising rollers 7 through a single control actuator.
- the eccentric bushes B1, B2 B3, B4, that house the ball bearings 8 and 9, have the rotation axis Ac of the respective roller 7 offset in respect to the rotation axis Ab of the two supporting bushes. Because of this, by rotating the supporting bushes, the radial position as referred to the drum's axis of the rotation axis Ac of the raising rollers 7 increases or decreases.
- the relative distance between the two axes Ac and Ab determines the variation range of the radial position of the axes of the satellite rollers, as shown in Fig. 1.
- the "expansion” or “contraction” of the drum's circumference determines a “getting closer” or a “getting farther apart” of the satellite rollers.
- the leaning points (lines of contact) of the fabric 12 over the rotating drum may become closer or be more spaced apart by varying the spacing between adjacent rollers 7.
- the leaning configuration of the fabric over the raising rollers may be considered represented by polygonal line, the segment length of which can be reduced or increased. This has a marked influence on the "engagement" between the raising-napping fillet set on the cylindrical surface of the satellite rollers 7 and the cloth 12.
- Relatively lightweight fabrics are easier to treat by reducing the distance (the length of the segment of the ideal polygonal line) between the points of engagement with the fillets of adjacent satellite rollers 7, whereas in the case of relatively heavy fabrics, the raising or napping action may be accentuated by expanding the drum's circumference that is, by increasing the distance among the leaning lines (engagement) with the fillets of adjacent satellite rollers.
- the synchronous rotation of all the eccentric bushes B1, B2, ..., Bn-1, Bn is actuated by a single device that as shown in the illustrated embodiment may be an electric gearmotor 13 mounted on an appropriate support 14 that is fixedly assembled on the drum's shaft 2.
- the motor 13 may be drivable through a multiwire cable passing inside the hollow shaft 2 of the drum and suitably connected through a plurality of electric brushes 15 to an external command console.
- the motor 13 drives a shaft 16, having two gears 17 and 18, respectively, that engage with the toothing 19 and 20 of the two idle stepped gear wheels 21 and 22, mounted on bearings 23 and 24 on the drum's shaft 2.
- the two idle stepped gear wheels 21 and 22 have a toothing, 25 and 26 that engages with the toothing 27 of each bush B1 , B2, .... B3, B4, ... .
- the idling rollers that normally maintain a correct tension of the running fabric 12, are naturally capable of automatically maintaining a correct constant tension of the running fabric 12 following either a contraction or an expansion of the effective diameter of the rotating drum.
- the radial position of the two rotary brushes 30 and 31 must be adapted to the eventual expansion or contraction of the drum's effective diameter in order to perform an effective cleaning action on the fillets of the satellite rollers 7.
- Such a "tracking" of the position of the rotary brushes rollers 30 and 31 may be implemented through any automatic positioning device, whose realization does not involve any difficulty for any ordinarily skilled technician.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT1996/000076 WO1997039173A1 (en) | 1996-04-17 | 1996-04-17 | Raising or napping machine |
EP96910179A EP0833974A1 (en) | 1996-04-17 | 1996-04-17 | Raising or napping machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT1996/000076 WO1997039173A1 (en) | 1996-04-17 | 1996-04-17 | Raising or napping machine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997039173A1 true WO1997039173A1 (en) | 1997-10-23 |
Family
ID=11332588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT1996/000076 WO1997039173A1 (en) | 1996-04-17 | 1996-04-17 | Raising or napping machine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0833974A1 (en) |
WO (1) | WO1997039173A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999054538A2 (en) * | 1998-03-03 | 1999-10-28 | Gematex Textilveredlungsmaschinen Gmbh | Machine for treating the surface of at least one textile web of endless fabric, especially for napping and/or emerizing or the like |
ITUD20110086A1 (en) * | 2011-06-10 | 2012-12-11 | Lafer Spa | POSITIONING AND AUTOMATIC ADJUSTMENT DEVICE, AND ITS PROCEDURE, FOR ONE OR MORE CLEANING BRUSHES IN A FABRIC FINISHING MACHINE AND FINISHING MACHINE INCLUDING SUCH A DEVICE |
JP2014139356A (en) * | 2012-12-17 | 2014-07-31 | Tsudakoma Corp | Fuzz-forming apparatus |
CN116463809A (en) * | 2023-06-16 | 2023-07-21 | 江苏沛飞特包装材料有限公司 | Drum-type textile reverse hook type napping device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4135699C1 (en) * | 1991-10-30 | 1992-10-29 | Gebrueder Sucker + Franz Mueller Gmbh & Co, 4050 Moenchengladbach, De | Operation of tambour raising machine - has identical number of napping and counter napping rolls distributed on periphery of revolving tambour |
EP0649927A2 (en) * | 1993-08-30 | 1995-04-26 | SPEROTTO RIMAR S.p.A. | Teaseling and/or fluffing machine for fabric and knit-work with tension control |
-
1996
- 1996-04-17 WO PCT/IT1996/000076 patent/WO1997039173A1/en not_active Application Discontinuation
- 1996-04-17 EP EP96910179A patent/EP0833974A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4135699C1 (en) * | 1991-10-30 | 1992-10-29 | Gebrueder Sucker + Franz Mueller Gmbh & Co, 4050 Moenchengladbach, De | Operation of tambour raising machine - has identical number of napping and counter napping rolls distributed on periphery of revolving tambour |
EP0649927A2 (en) * | 1993-08-30 | 1995-04-26 | SPEROTTO RIMAR S.p.A. | Teaseling and/or fluffing machine for fabric and knit-work with tension control |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999054538A2 (en) * | 1998-03-03 | 1999-10-28 | Gematex Textilveredlungsmaschinen Gmbh | Machine for treating the surface of at least one textile web of endless fabric, especially for napping and/or emerizing or the like |
WO1999054538A3 (en) * | 1998-03-03 | 2000-11-23 | Gematex Textilveredlungsmaschi | Machine for treating the surface of at least one textile web of endless fabric, especially for napping and/or emerizing or the like |
US6584657B1 (en) | 1998-03-03 | 2003-07-01 | Xetma Gematex Gmbh | Machine for treating the surface of at least one textile web of endless fabric, especially for napping and/or emerizing or the like |
ITUD20110086A1 (en) * | 2011-06-10 | 2012-12-11 | Lafer Spa | POSITIONING AND AUTOMATIC ADJUSTMENT DEVICE, AND ITS PROCEDURE, FOR ONE OR MORE CLEANING BRUSHES IN A FABRIC FINISHING MACHINE AND FINISHING MACHINE INCLUDING SUCH A DEVICE |
WO2012168463A1 (en) | 2011-06-10 | 2012-12-13 | Lafer Spa | Positioning and automatic adjusting device, and corresponding method, for one or more cleaning brushes in a fabric finishing machine, and finishing machine comprising said device |
JP2014139356A (en) * | 2012-12-17 | 2014-07-31 | Tsudakoma Corp | Fuzz-forming apparatus |
CN116463809A (en) * | 2023-06-16 | 2023-07-21 | 江苏沛飞特包装材料有限公司 | Drum-type textile reverse hook type napping device |
CN116463809B (en) * | 2023-06-16 | 2023-10-10 | 江苏沛飞特包装材料有限公司 | Drum-type textile reverse hook type napping device |
Also Published As
Publication number | Publication date |
---|---|
EP0833974A1 (en) | 1998-04-08 |
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