EP3754088A1 - Vorrichtung zum verdichten eines textilen substrats durch ein elastisches band - Google Patents

Vorrichtung zum verdichten eines textilen substrats durch ein elastisches band Download PDF

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Publication number
EP3754088A1
EP3754088A1 EP20179933.5A EP20179933A EP3754088A1 EP 3754088 A1 EP3754088 A1 EP 3754088A1 EP 20179933 A EP20179933 A EP 20179933A EP 3754088 A1 EP3754088 A1 EP 3754088A1
Authority
EP
European Patent Office
Prior art keywords
belt
cylinder
roller
interposition
motorized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20179933.5A
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English (en)
French (fr)
Inventor
Giulio MANDRUZZATO
Andrea NICOLETTI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Santex Rimar Group SRL
Original Assignee
Santex Rimar Group SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Santex Rimar Group SRL filed Critical Santex Rimar Group SRL
Publication of EP3754088A1 publication Critical patent/EP3754088A1/de
Pending legal-status Critical Current

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    • 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
    • D06C21/00—Shrinking by compressing
    • 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
    • D06C21/00—Shrinking by compressing
    • D06C21/005—Compacting belts
    • 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
    • D06C7/00—Heating or cooling textile fabrics

Definitions

  • the present invention relates to an apparatus for compacting a continuous textile substrate by means of elastic belt.
  • the compacting process of fabrics or textile substrates is one of the main processes in the field of textile finishing and has the purpose of giving stability to the fabrics before going to the manufacturing step.
  • the stability and compaction of the fabric is imparted with machinery with consolidated technology which use a change in the curvature of a felt or rubber belt on which the fabric on which to impart the compaction is placed.
  • the change of curvature of the support then imparts a longitudinal retraction to the fabric which is then pressed against a hot cylinder, which stabilizes the compacting effect ensuring the dimensional stability of the fabric once it leaves the machine.
  • the compacting (or shrinking) treatment of fabrics is carried out essentially by means of a so-called "compression” technique which is based on the use of a substantially deformable belt, to which the fabric to be compacted is tightly coupled.
  • the deformation of the belt in the longitudinal direction of advancement by means of mechanical means suitable for the purpose, substantially consists of the succession of a first expansion step and a second contraction step.
  • the fabric, engaged integrally with the deformable surface of the belt undergoes, in particular during the contraction step, a "compression" in the direction of advancement, that is, a compaction of its structure and, ultimately, a longitudinal shrinking.
  • the deformability of the belt may be determined by the type and features of the material of which it is made and also by the type of mechanical stress exerted thereon by the mechanical means adapted to deform it.
  • deformations by pressing of the belt are known which cause the expansion (elongation) thereof followed by a contraction (shortening) to the initial relaxed state; or deformations by variation of peripheral speed of the belt obtained by sliding it on rollers or cylinders with different radius of curvature with an alternately convex and concave path which alternately cause an increase (lengthening) and a decrease (shortening) of peripheral speed; or, finally, deformations by longitudinal traction of the belt (elongation) followed by a release of the traction (shortening) to the initial relaxed state.
  • GB patent 563 638 describes an apparatus for compacting fabrics which aims to improve the prior art by using an endless elastic belt supported and guided by rollers, one of which rotates at a variable speed and higher than the roller that precedes it.
  • the portion of the belt comprised between said two rollers is placed in an elongated state, while in the following section, as tension is relaxed, the belt undergoes a longitudinal contraction equal to the previous elongation.
  • the fabric, coupled to the belt at the elongated portion thereof, follows it in the subsequent relaxed portion, in partial winding around a rotating and heated cylinder, also undergoing a corresponding longitudinal contraction or shrinkage.
  • a further negative aspect is linked to the fact that the elastic belt, which is therefore extendable in length, subjected to longitudinal traction also deforms transversely with a consequent and uncontrollable decrease in width.
  • both dimensions of the belt tend to regain the original size, that is to say, it re-widens and since, as mentioned, it has not maintained any minimum residual tension, its surface tends to flow loosely and not outstretched, transmitting such irregularities to the fabric coupled thereto.
  • this solution provides for a pre-tensioning traction to be applied to the elastic belt in such a way that it maintains a minimum residual tension at the end of the release step of the traction which caused the elongation thereof.
  • the fabric compaction apparatus described in EP1657340A1 comprises a heated rotating cylinder around which an elastic belt is partially wound.
  • the elastic belt is moved by a plurality of motorized rollers and idle return rollers according to a predefined closed path.
  • the roller apparatus is configured in such a way that by operating on the relative position of one of the idle rollers it is possible - during assembly of the belt on the rollers - to pre-tension the belt itself with respect to its relaxed state.
  • the elastic belt is further stretched by elongation before coming into contact with the cylinder.
  • the belt comes into contact with the fabric in the winding section around the cylinder, the belt is free to contract longitudinally, thereby dragging the fabric with it in a relative movement with respect to the cylinder. In this way, the fabric is dragged by the longitudinal contraction movement of the elastic belt and is thus compacted longitudinally.
  • the compaction apparatus described above allows the compaction process to be improved by virtue of the belt pre-tensioning, but the results obtained are however not completely satisfactory.
  • the contact area (direct or indirect) between the hot cylinder and the elastic belt is an area of high instability because at it the elastic deformability features of the belt meet the rigidity of the hot cylinder steel surface.
  • the elastic belt exerts its compacting action on the textile substrate transmitting to the substrate its own contraction and return movement to the original (pretensioned) length.
  • the elastic belt slides on the surface of the hot cylinder because the belt and the hot cylinder, although moving in the same direction, could never have identical speeds.
  • This effect adds to the slowing down of the belt caused by the frictions generated by the direct contact between the belt and the cylinder.
  • the heated cylinder and the elastic belt are sized in such a way that their height is greater than the heights of the textile substrates which are normally subjected to compaction. Therefore, during use it is unavoidable that the elastic belt comes into direct contact with the heated cylinder at two strips located laterally to the textile substrate which slides interposed between the elastic belt and the cylinder.
  • the non-homogeneous sliding of the belt generates waves along the height extension of the belt itself. These waves, in addition to mechanically stressing the belt, reducing its operating life, are transmitted to the textile substrate being treated, causing undesired creases and tensions therein.
  • the present invention therefore aims to address the problems linked to these phenomena, meeting a general need in the sector, that is to make the compaction of the textile substrate more efficient, possibly also increasing the operating life of the elastic belt.
  • the object of the present invention is to eliminate in whole or in part the drawbacks of the prior art cited above, by providing an apparatus for compacting textile substrates by means of elastic belt which allows the compaction of the textile substrate to be made more efficient and the operating life of the elastic belt to be increased.
  • a further object of the present invention is to provide an apparatus for compacting fabrics by means of elastic belt which allows the stresses imposed on the elastic belt to be reduced during the contraction step in contact with the heatable cylinder.
  • a further object of the present invention is to provide an apparatus for compacting fabrics by means of elastic belt which is simple and cost-effective to manufacture.
  • a further object of the present invention is to provide an apparatus for compacting fabrics by means of elastic belt which may be managed in an operationally simple manner.
  • reference numeral 1 indicates as a whole an apparatus for compacting a continuous textile substrate by means of an elastic belt according to the invention.
  • the textile substrate T may be of any type; in particular it may be an orthogonal (shuttle) fabric or a knitted fabric.
  • the textile substrate may be formed by any type of fiber used for shuttle and knitted fabrics.
  • the compacting apparatus 1 comprises:
  • such a roller system comprises a plurality of idle return rollers 33, 34, 35 and a plurality of motorized rollers 31, 32.
  • the motorized rollers 31, 32 may be operated so as to make the belt 20 slide along the aforementioned closed path, imposing an additional tensional state of elongation on the belt with respect to the pretensioning one at a first section T1 of said path which extends - with respect to a direction of advancement X of the belt - upstream of a second section T2 of such a path in which said belt 20 is kept in contact with the rotating cylinder.
  • the compacting apparatus 1 further comprises means 40 for guiding a textile substrate T between the belt 20 and the heatable cylinder 10 along the second section T2 of such a closed path.
  • the compacting action on the textile substrate T takes place along the aforementioned second section T2 of the closed path.
  • the elastic belt contracts elastically, passing from the additional tensional state of elongation, which was imposed thereon upstream in the first section T1, to a state close to that of pretensioning.
  • the compacting apparatus 1 comprises a system for reducing the friction coefficient between the belt 20 and the heatable rotating cylinder 10.
  • Such a friction reduction system in turn comprises one or more interposition tapes 61, 62 or 63 which are guided in partial winding around the cylinder 10 and in direct contact with its side surface 10a to interpose itself/themselves between the belt 20 and the side surface 10a of the cylinder 10 along the aforesaid second section T2 of the closed path of the belt.
  • interposition between belt and cylinder of such one or more interposition tapes 61, 62 or 63 takes place at least at two axial end strips 11, 12 of the side surface 10a of the cylinder 10 which are in axially opposite positions with respect to the axis of rotation Y of the cylinder itself.
  • Said one or more interposition tape 61, 62 or 63 are made of a material that is suitable to generate with the side surface of the cylinder 10 a friction coefficient lower than that generated with the belt 20.
  • the friction coefficient reduction system intervenes, therefore, at least at the two axial end tapes of the side surface 10a of the cylinder 10 which in use are generally left uncovered by the textile substrate T being treated.
  • the friction coefficient reduction system is configured to avoid direct contact between elastic belt 20 and side surface 10a of cylinder 10.
  • the invention exploits the physical phenomena related to the friction between different materials: elastic belt material; interposition tape material; metal of the heatable cylinder.
  • the interposition tapes are made of a material which generates the lowest possible frictional forces with the metal surface of the cylinder.
  • interposition tapes tend to move integrally with the elastic belt and follow its contraction movements, while said one or more tapes tend to slide freely on the metal surface of the cylinder.
  • the interposition tapes therefore act as a sort of solid lubricant.
  • a further advantage over prior art solutions lies in the fact that the heatable cylinder 10 no longer requires particular and expensive surface treatments to reduce the friction coefficient with the belt 20, but a normal surface treatment is sufficient to obtain a roughness compatible with the material of the interposition tapes to obtain reduced friction coefficients. This may be achieved with low cost surface coatings, obtained for example by nitriding, chrome plating, deep/strong chrome plating.
  • the side surface 10a of the cylinder 10 has a roughness Ra of between 10 microns and 40 microns.
  • the roughness of the side surface 10a of cylinder 10 is no longer a fundamental parameter, since direct contact between belt 10 and cylinder 20 is no longer provided.
  • said one or more interposition tapes slide without friction on the side surface of the cylinder, remaining integral with the elastic belt, they are substantially not subject to significant sliding phenomena, nor to significant overheating phenomena.
  • the operating life of these tapes is therefore high. This leads to reduced operational maintenance needs.
  • said one or more interposition tapes 61, 62 or 63 are made of fabric or non-woven fabric.
  • the interposition tapes have mechanical features comparable to those of the textile substrates T which are treated by the compacting apparatus 1.
  • the choice of a fabric or a non-woven fabric makes the interposition tapes more capable of following the contraction movements of the belt 20, due to intrinsic deformability properties. The risk that the interposing tapes may disturb the movements of the belt 20 is therefore reduced.
  • said one or more interposition tapes may be made of a fabric of natural textile fibers, preferably selected from the group consisting of cotton, wool, cellulose.
  • said one or more interposition tapes are made of a fabric or a non-woven fabric of synthetic fibers, preferably selected from the group consisting of polyester and nylon.
  • Said one or more interposition tapes may be made of a mixed fabric of natural fibers and synthetic fibers.
  • the aforementioned fabric or non-woven fabric comprises elastomeric fibers.
  • the aforementioned one or more interposition tapes are made of a fabric defined by a mixture of polyester-elastane and/or nylon-elastane fibers.
  • said fabric or said non-woven fabric has a basis weight of not less than 50g/m2.
  • the compacting apparatus 1 comprises means for wetting with an aqueous solution, preferably only water, said one or more interposition tapes 61, 62 or 63.
  • the wetting of the interposition tapes is provided in the case in which such tapes are made of woven fabric or non-woven fabric. It has been found that the wetting of the tapes facilitates their sliding on the surface of the cylinder and has beneficial effects on the compaction process of the textile substrate T to be treated.
  • the aforementioned friction coefficient reduction system comprises two distinct interposition tapes 61, 62.
  • these two distinct tapes 61 and 62 are guided in partial winding around the cylinder 10 and in direct contact with its side surface to interpose itself between the belt 20 and the side surface 10a of the cylinder 10 along the aforesaid second section T2 of the closed path of the belt.
  • a first interposition tape 61 is guided at a first axial end strip 11 of the side surface 10a of the cylinder 10 and a second interposition tape 62 is guided at a second axial end strip 12 of the side surface 10a of the cylinder 10.
  • the axial winding position of both or at least one of said two interposition tapes 61, 62 around the cylinder 10 is adjustable so as to vary the width in the axial direction (height) of the uncovered central strip 13.
  • This adjustment of the axial position is made as a function of the height H of the textile substrate T to be treated.
  • the compacting apparatus 1 may have to treat textile substrates T having different heights H, during the design step the interposition tapes are dimensioned in terms of height H1 and H2 with the maximum hypothetical value according to the minimum height Hmin that the textile substrate may have.
  • the two tapes 61 and 62 should have a total height H1 + H2 as a whole such as to cover the two end strips 11 and 12, in case the apparatus 1 processes a textile substrate with a minimum height Hmin.
  • Hn axial extension of the belt 10
  • H1 + H2 + Hmin should be equal to or greater than Hn.
  • the heights H1 and H2 of the two tapes 61 and 62 should be sized so that the two end strips 11 and 12 left uncovered by the textile substrate T may always be covered by the two interposition tapes 61 and 62.
  • interposition tapes 61 and 62 may axially protrude with respect to the belt 20 or to the cylinder 10.
  • the aforementioned friction coefficient reduction system may comprise a single interposition tape 63 which is guided in partial winding around the cylinder 10 and in direct contact with its side surface 10a for interposing itself between the belt 20 and the side surface of the cylinder 10 along said second section T2 of the closed path of the belt.
  • said single interposition tape 63 has an axial extension H3 at least equal to the axial extension Hn of said belt 20.
  • said single interposition tape 63 therefore interposes also between the textile substrate T to be treated and the side surface 10a of the cylinder 10.
  • the textile substrate T to be treated does not come into contact with the cylinder 10, but with the interposition tape 63.
  • the interposition tape 63 Due to the friction that forms between the textile substrate T and the interposition tape 63 (in particular when it is made of woven fabric or non-woven fabric), the interposition tape 63 will tend to follow the textile substrate T integrally and to slide freely with respect to the cylinder 10 surface. There will therefore be no slipping between textile substrate T and interposition tape 63. The textile substrate T will therefore not be disturbed by the interposition tape and may therefore follow the contraction movements of the belt 20, to the benefit of a correct performance of the compaction process.
  • the embodiment with two distinct tapes 61 and 62 adjustable in position is preferred since in this way the tape 20 substantially does not encounter thickness discontinuities in its winding around the cylinder 10.
  • the tape 20 encounters a reduction in thickness, which could disturb it.
  • each of said one or more interposition tapes 61, 62 and 63 forms an endless belt which is wound around the cylinder 10 and a guide system comprising one or more return rollers 71, 72.
  • the two distinct interposition tapes 61, 62 are both guided by the same guide system.
  • the friction reduction system described above is applicable in any compacting apparatus with elastic belt, which provides for the pretensioning of the belt itself.
  • the friction reduction system according to the invention is applied to a compacting apparatus as described below.
  • the above roller system on which the belt 20 is wound in an elongation pre-tensioning state comprises:
  • the motorized drive roller 31 is the roller placed immediately upstream of the heatable cylinder 10
  • the second idle return roller 34 is the roller placed immediately downstream of the heatable cylinder 10.
  • the first section T1 of the aforementioned closed path (at which the belt 20 is in use elastically elongated, receiving an additional tensional state of elongation with respect to the pretensioning one) extends between the motorized brake roller 32 and the motorized drive roller 31, passing in partial winding around the first idle return roller 33.
  • the second section T2 of path (at which the belt 20 in use contracts itself, losing the additional tensional state of elongation to return to the pretensioning state) extends between the motorized drive roller 31 and the second idle return roller 34.
  • the above closed path is completed by a third section T3 of path extending between the second idle return roller 34 and the motorized brake roller 32.
  • the belt 20 is in a relaxed tension state with respect to the first section T1 of path, substantially corresponding to the pretensioning state.
  • the "closed path” corresponds to the total extension of the belt 20 when mounted in pretension on the roller system.
  • the closed path is not affected by local contractions and local elongations of the belt.
  • the belt is therefore continuously stressed in elongation or contraction, without actually being able to remain in the pretensioning state, that is in the state of minimum elongation, which may be considered the rest state.
  • the belt already immediately downstream of the brake roller, the belt begins to undergo the elongation action exerted by the drive roller.
  • the aforementioned third section T3 has been introduced in the closed path, in which the belt - after having contracted in the second section T2 - is free to remain in the pretensioning state.
  • the third section T3 may be considered a rest section for the belt, as opposed to the first elongation section T1 and the second contraction section T2.
  • the motorized drive 31 and brake 32 rollers, the idle return rollers 33, 34, 35, as well as the heatable cylinder 10 are made of metal, preferably steel.
  • the motorized brake roller 32 and the motorized drive roller 31 are both provided with a rubber coating 36 which covers the respective cylindrical side surfaces intended to contact the belt 20.
  • the friction coefficient between the motorized rollers and the belt is increased with respect to the case of contact of the belt on the bare surface of the cylinder, typically smooth metal.
  • the increase in the friction coefficient reduces the risk of slipping between the belt and the rollers. This contributes to improving the control over the elongation action of the belt and therefore to increasing the efficiency of the compaction process of the textile substrate.
  • both the first idle return roller 33 and the second idle return roller 34 are not rubber-coated.
  • both the first idle return roller 33 and the second idle return roller 34 are provided with a cylindrical side surface, preferably made of metal material, intended to come into direct contact with the belt 20 without the interposition of a rubber coating covering such a cylindrical side surface.
  • the idle return rollers 33 and 34 are not rubber-coated and the elastic belt 20 comes into direct contact with their metal side surface, the friction between the belt and the idle rollers is reduced. In this way, by virtue of the reduction of friction, the belt encounters fewer obstacles in its elastic extension and subsequent contraction.
  • the additional tensional state of elongation is imposed on the belt 20 by acting on the speeds of the motorized drive roller 31 and the motorized brake roller 32, so as to create a difference between the tangential speeds of the side surfaces of the two rollers (intended to contact the belt).
  • the tensional state of elongation (measurable for example by percentage of elongation with respect to the pretensioning state) increases as the difference in these speeds increases.
  • the apparatus 1 may comprise a control unit 50, preferably electronic, configured to control the rotation of the motorized drive roller 31 and of the motorized brake roller 32 so that said two motorized rollers 31, 32 rotate in the same direction and so that the tangential speed Vt of the motorized drive roller 31 is higher than the tangential speed Vf of the motorized brake roller 32 according to a predefined ratio Vf/Vt.
  • a control unit 50 preferably electronic, configured to control the rotation of the motorized drive roller 31 and of the motorized brake roller 32 so that said two motorized rollers 31, 32 rotate in the same direction and so that the tangential speed Vt of the motorized drive roller 31 is higher than the tangential speed Vf of the motorized brake roller 32 according to a predefined ratio Vf/Vt.
  • such a predefined ratio Vf/Vt between the tangential speed of the motorized brake roller 32 and the tangential speed of the motorized drive roller 31 is adjustable as a function of the extent of additional longitudinal elongation to be imposed on the belt at the first section of path T1.
  • said predefined ratio Vf/Vt is between 0.5 and 0.9, and preferably equal to 0.7.
  • the heatable rotating cylinder 10 is motorized.
  • heatable cylinder it is meant in particular a cylinder provided with or associated to heating means.
  • the heating means can be of any type suitable for the purpose, i.e. heating the surface of the rotating cylinder.
  • control unit 50 is configured to control the rotation of the heatable cylinder so that its tangential speed (referred to the side surface 10a) - is as close as possible to and preferably equal to the tangential speed of the motorized drive roller 31.
  • the motorized drive roller 31, the motorized brake roller 32 and the first idle return roller 33 are positioned in relation to each other such that the above first section T1 of the closed path has a length extension not exceeding 35% of the entire closed path, and preferably not lower than 10%.
  • the motorized drive roller 31, the motorized brake roller 32 and the first idle return roller 33 are positioned in relation to each other so as to assume a compact configuration.
  • Compact configuration refers to a configuration in which said three rollers 31, 32, and 33 are in close proximity to each other when compared with the other rollers 34 and 35 of the roller system.
  • the "compact configuration" is essentially aimed at reducing as much as possible the extension of the first section T1 of the path in favor of the third section T3 of the path.
  • said three rollers 31, 32, and 33 may be arranged to form a triad of rollers with aligned centers of rotations. This choice is preferred from a constructive point of view as it allows a reduction in the overall dimensions and simplifies the support structure of the rollers themselves.
  • configurations of the triad of rollers may be provided in which the rollers are not aligned with each other.
  • the motorized drive roller 31, the motorized brake roller 32 and the first idle return roller 33 are positioned in relation to each other such that the winding angle of said belt 20 around the motorized drive roller 31 and the motorized brake roller 32 is not lower than 90°.
  • the belt is installed on the triad of rollers so as to follow an S-path between the three rollers.
  • the two motorized rollers 31 and 32 contact the belt on its inner surface, while the first idle return roller 33 contacts the belt on its outer surface.
  • the first idle return roller 33 interposed between the two motorized rollers 31 and 32, may thus push the belt against them, favoring the winding of the belt.
  • the "push" action of the return roller and therefore the effect in terms of winding may be calibrated by operating on the nominal diameters of the rollers and/or on the relative position of the centers of rotation.
  • the motorized drive roller 31 is the roller placed immediately upstream of the heatable cylinder 10
  • the second idle return roller 34 is the roller placed immediately downstream of the heatable cylinder 10.
  • the motorized drive roller 31 and the second idle return roller 34 are positioned with respect to the cylinder 10 so that:
  • the aforesaid distance D1 is less than the thickness S of the belt 20 by a value of between about 0% and about 50%; the aforementioned distance D2 is greater than the thickness S of the belt 20 by a value of between about 0% and about 100%.
  • the aforesaid second idle return roller 34 is movable with respect to the other rollers 31, 32, 33 to vary their relative position and allow:
  • the second idle return roller 34 is movable with respect to the other rollers 31, 32, 33 along an arc of circumference concentric to the axis of rotation of the cylinder 10 between a position of maximum winding of the belt around the cylinder and a position of minimum winding around the cylinder.
  • the second idle return roller 34 is slidably engaged at both its axial ends to a guide (not shown in the accompanying Figures) shaped according to said arc of circumference.
  • the second idle return roller 34 is lockable both in the aforementioned two extreme positions of the aforementioned arc of circumference, and in one or more intermediate positions, so as to adjust the extension of said second section T2 of the closed path and therefore the degree for winding the belt around the cylinder 10.
  • the compaction effect on the textile substrate according to the requests dictated by the type of fiber and the result to be obtained.
  • the locking of the second idle return roller 34 along the aforesaid shaped guide may be carried out by means of brackets which also include the bearings suitable for rotating the pin of the roller and which may be fixed, for example, by means of screws to the support structure of the apparatus.
  • the fixing of the roller takes place at shoulders suitably perforated in advance along said guide in predefined angular positions corresponding to the adjustment positions to be provided.
  • the arc of circumference has an extension of 90°.
  • Arcs of circumference with smaller width may be provided according to operational needs.
  • the adjustment of the position of the second idle return roller 34 with respect to the cylinder 10 modifies the tensioning state of the belt.
  • the apparatus 1 comprises a third idle return roller 34 which engages the belt at the third section T3 of the path and is movable with respect to the other rollers 31, 32, 33 to compensate for the position variations of the second idle return roller 34.
  • the third idle return roller 35 is slidably engaged at both its axial ends to a suitably shaped guide (not shown in the accompanying Figures).
  • the third idle roller 35 may also be fixed and stopped also in intermediate positions between two maximum and minimum compensation positions.
  • the fixing may take place by means of brackets which include the roller bearings and which will be fixed by screws at the shoulders of the apparatus suitably perforated at the predefined positions.
  • the third idle return roller 35 is not rubber-coated.
  • the third idle return roller 35 is provided with a cylindrical side surface, preferably made of metal material, intended to come into direct contact with the belt 20 without the interposition of a rubber coating covering such a cylindrical side surface.
  • the above belt 10 is elastically deformable in elongation for a percentage between 5% and 100% of its length in the relaxed state before pre-tensioning and, preferably in its pre-tensioning state, for a percentage between 30% and 50% with respect to its relaxed length.
  • the belt 20 has a thickness S comprised between about 4.0 mm and about 16.0 mm and, preferably, of about 10 mm.
  • the belt 20 may be made of a substantially extensible and elastic material, in particular of natural or synthetic rubber, or combinations thereof.
  • the material may contain additives suitable for improving the mechanical and heat resistance features thereof.
  • the apparatus for compacting textile substrates by means of elastic belt allows making the compaction of the textile substrate more efficient and increasing the operating life of the elastic belt due to a reduction of the frictions between the belt and the cylinder.
  • the apparatus for compacting textile substrates by means of elastic belt according to the invention allows the stresses imposed on the elastic belt during use to be reduced, and in particular in the contraction zone around the heatable cylinder.
  • the apparatus for compacting textile substrates by means of elastic belt according to the invention is simple and cost-effective to manufacture.
  • the apparatus for compacting textile substrates by means of elastic belt according to the invention may be managed in an operationally simple way.
  • the apparatus for compacting textile substrates by means of elastic belt allows in particular - due to a specific configuration of the roller system - the tension of the elastic belt to be controlled more precisely so as to make the fabric compacting process more efficient.
  • the apparatus for compacting textile substrates by means of an elastic belt according to the invention allows reducing the stresses imposed on the elastic belt during use, as a whole and not only at the contraction zone.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP20179933.5A 2019-06-17 2020-06-15 Vorrichtung zum verdichten eines textilen substrats durch ein elastisches band Pending EP3754088A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000009198A IT201900009198A1 (it) 2019-06-17 2019-06-17 Apparato di compattazione di un substrato tessile continuo tramite nastro elastico

Publications (1)

Publication Number Publication Date
EP3754088A1 true EP3754088A1 (de) 2020-12-23

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Application Number Title Priority Date Filing Date
EP20179933.5A Pending EP3754088A1 (de) 2019-06-17 2020-06-15 Vorrichtung zum verdichten eines textilen substrats durch ein elastisches band

Country Status (7)

Country Link
EP (1) EP3754088A1 (de)
JP (1) JP2020204138A (de)
CN (1) CN112095268A (de)
EA (1) EA039952B1 (de)
IT (1) IT201900009198A1 (de)
MA (1) MA53678A (de)
MX (1) MX2020006381A (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374482A (en) * 1943-02-18 1945-04-24 Hadfield James John Apparatus for effecting the shrinking or the stretching of textile fabrics
JPS51144508U (de) * 1975-05-02 1976-11-20
JPS51136992A (en) * 1975-05-19 1976-11-26 Hokushin Tetsukoushiyo Kk Finish apparatus of weaving and stitch fabric
US4003783A (en) * 1973-09-07 1977-01-18 Clupak, Inc. Method for compacting a nonwoven fabric impregnated with a thermoplastic binder
AT365250B (de) * 1975-07-24 1981-12-28 Cluett Peabody & Co Inc Vorrichtung zum schrumpfen von tuch
EP1657340A1 (de) * 2004-11-15 2006-05-17 Sperotto Rimar S.R.L. Vorrichtung und Verfahren zum Krumpfen von Textilsubstraten

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JP2020204138A (ja) 2020-12-24
EA202091249A1 (ru) 2020-12-30
IT201900009198A1 (it) 2020-12-17
MA53678A (fr) 2022-02-23
EA039952B1 (ru) 2022-03-31
MX2020006381A (es) 2020-12-18

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