EP3998895A1 - Procede de fabrication d'un article chaussant - Google Patents
Procede de fabrication d'un article chaussantInfo
- Publication number
- EP3998895A1 EP3998895A1 EP20743644.5A EP20743644A EP3998895A1 EP 3998895 A1 EP3998895 A1 EP 3998895A1 EP 20743644 A EP20743644 A EP 20743644A EP 3998895 A1 EP3998895 A1 EP 3998895A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- knitted
- tubular part
- knitted tubular
- manufacturing
- equal
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/02—Footwear characterised by the material made of fibres or fabrics made therefrom
- A43B1/04—Footwear characterised by the material made of fibres or fabrics made therefrom braided, knotted, knitted or crocheted
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/02—Footwear characterised by the material made of fibres or fabrics made therefrom
- A43B1/028—Synthetic or artificial fibres
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/02—Uppers; Boot legs
- A43B23/0245—Uppers; Boot legs characterised by the constructive form
- A43B23/0255—Uppers; Boot legs characterised by the constructive form assembled by gluing or thermo bonding
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/0036—Footwear characterised by the shape or the use characterised by a special shape or design
- A43B3/0042—Footwear characterised by the shape or the use characterised by a special shape or design with circular or circle shaped parts
Definitions
- the present invention relates to a method of manufacturing an article of footwear, in particular for practicing a sport.
- the present invention relates to a method of manufacturing an article of footwear, in particular the upper of said article of footwear, using one or more component (s) knitted tubular (s) in three dimensions for the production of an upper comprising an integrated sole portion.
- the articles of footwear of the state of the art generally include two main elements, namely an upper and a sole structure.
- the upper is secured to the sole structure and forms a void or space for accommodating the foot within the article of footwear to securely and comfortably receive the foot.
- the sole structure is secured to the lower area of the upper, and is thus positioned between the upper and the ground.
- the sole structure may include a midsole and an outsole, the outer face of which is intended to come into direct contact with the ground.
- the midsole typically includes a polymeric foam material that dampens impact reactions with the ground to decrease impact feedback forces generated on the foot and leg during walking, running, or other activities while walking. wearing of the footwear.
- the midsole may comprise one or more chamber (s) filled with a fluid, one or more damping part (s) or other elements which make it possible to attenuate the return forces. impact and improve stability or even influence foot movements and therefore proprioception.
- the outsole is secured to the undersurface of the midsole and provides a ground engaging portion of the sole structure, which ground engaging portion is formed of a wear resistant and durable material, such as for example a material based on rubber or on a synthetic elastomer.
- the sole structure may also include an inner liner positioned within the accommodating volume of the foot of the upper and near the undersurface of the foot to enhance the comfort of the footwear.
- the upper generally comprises many parts, such as a lateral quarter, a medial quarter, a front protective toe, a tongue, a heel, a rear buttress, an upper, a tightening device with in particular loops / (eyelets for passage of 'a lace) and a lace, an internal lining and possibly other parts. Some of these parts can be in several parts. The manufacture of a shoe thus requires assembling these different parts in order to form a three-dimensional rod by cutting these parts and assembling them flat.
- the shank generally extends above the instep and into the toe areas of the foot, along the lateral and medial sides of the foot, and around the ankle area of the foot.
- the rod can extend upwards and around the ankle to provide additional support and protection to the ankle.
- the clamping device is often incorporated into the rod to adjust the size of the rod and thus allow the foot to enter and withdraw from the void formed inside the rod.
- the upper may also include a tongue which extends under the tightening device, eg, the lacing system, to adjust the footwear, and the upper may include a rear reinforcement element to limit heel movement.
- the assembly of these different components / elements / parts requires a lot of time and can lead to errors in the manufacture of the article of footwear. The potential number of errors can thus be significant and make the manufacturing process more complex and therefore also make it more expensive.
- the upper can thus be glued to the sole element by a layer of glue; it can be glued to an insole which is relatively rigid.
- the upper can be assembled to the sole element by shaping the upper using different seams and then by assembling the upper to the insole by sewing using the so-called stroebel technique.
- the insole is in this case generally flexible so that it can be sewn. The insole thus forms the sole part or bottom of the upper.
- the method then comprises making a longitudinal cut in the sole part of the knitted tubular component, then placing this knitted tubular component flat using the longitudinal cut so as to reveal a flat portion on which a or functionalization components can be laid out flat.
- These functionalization components such as a logo, reinforcing elements, lacing eyelets, a hard toe or an upper or even a heel reinforcement, are applied manually to the flat portion of the knitted tubular component and then secured, for example by gluing. and / or sewing.
- the longitudinal cut made in the sole part manually is then closed, for example using a seam.
- a footwear assembly is then obtained comprising the primary upper made integral with one or more functionalization component (s).
- This shoe assembly is placed on a preform in the shape of a foot, then is thermoformed in the shape of the foot of the preform to form the final upper.
- the preforms are made of plastic or of composite material (s).
- a sole element such as a midsole is secured to the sole portion of the final upper.
- the present invention relates to a method of manufacturing an article of footwear, limiting the number of components and / or parts, thus making it possible to significantly reduce the manufacturing time, the number of manufacturing steps, limiting assembly errors. , minimizing the quantity of waste, and improving the quality of the rod obtained in terms of appearance, and mechanical properties.
- the present invention also relates to a method offering more possibilities in the aesthetic design of the rod, and making it possible to improve the stabilization of the rod.
- the present invention relates to a method of manufacturing an article of footwear that overcomes all or part of the aforementioned problems, in that it comprises the steps of:
- the flattening opening is formed during the knitting of the first knitted tubular part. Said flattening opening is therefore knitted. The step of cutting the flattening opening in the sole portion is thus eliminated. Moreover, the flattening opening being formed by knitting, it is positioned and dimensioned at least on the sole part in a reproducible manner, thus avoiding errors when it is produced manually.
- said at least one flattening opening comprises edges, in particular medial and lateral, arranged between the front and rear edges of the sole part of the first knitted tubular part, more preferably at least one of the edges, especially medial and lateral, does not include cut son.
- the flattening opening according to the invention does not include edges liable to unravel since they do not include cut threads.
- the flattening opening comprises at least one longitudinal segment, extends along a longitudinal axis I, parallel or coincident, with the longitudinal axis L of the footwear assembly, and in particular of the upper.
- the flattening opening comprises / (is formed of) a single segment or at least two segments, in particular intersecting, for example perpendicular or forming a cross.
- Each segment can be substantially rectilinear or curved, and / or extend along the longitudinal axis L or the transverse axis T or in any direction intersecting the longitudinal L and transverse axes T.
- the segment (s) that a flattening opening comprises define (s) the shape of the latter.
- the term “longitudinal” is understood to mean the direction L extending over a length or a major axis of the article of footwear or upper or assembly of footwear, or first or second tubular part. In some cases, the longitudinal direction may extend from a forefoot region to a rearfoot region of the article of footwear or the upper or assembly of footwear, or the first or second. knitted tubular part.
- the longitudinal axis L intersects, in particular substantially perpendicular, to the transverse axis T of the upper or of the footwear assembly, or of the first or of the second tubular part.
- the term “lateral” is understood to mean the direction T extending over a width or a minor axis of the article of footwear or of the upper or of the set of footwear, or of the insole or the upper. second knitted tubular part. The lateral direction can thus extend between the medial side and the lateral side of the article of footwear.
- vertical is understood to mean the direction extending generally perpendicular to the lateral direction and to the longitudinal direction.
- the longitudinal axis L corresponds to the longitudinal axis of symmetry of the upper or footwear assembly.
- the functional component (s) can / can be kept arranged on the first knitted tubular part and / or the second knitted tubular part by sewing and / or bonding and / or by welding, in particular thermal welding, in particular by ultrasound, using one or more holding point (s); in particular by one or more stitch (s) of stitching and / or one or more stitch (s) of glue and / or one or more stitch (s) of welding, for example ultrasonic welding.
- This arrangement makes it possible to maintain the functionalization component (s) in its location (s) of functionalization, optionally while awaiting complete bonding during thermoforming step (iv).
- the functional component (s) can / can be joined together arranged on the first knitted tubular part and / or the second knitted tubular part by sewing and / or bonding and / or by welding, in particular thermal, in particular by ultrasound.
- thermoforming involves the application of heat to the footwear assembly, and this for a time and at a temperature sufficient to obtain thermoforming of the footwear assembly to the foot shape of the preform.
- the temperature (s) applied during the transformation step (iv) is / are greater (s) or equal (s) to the temperature (s) of melting and / or softening of the hot-melt portion (s) of the first knitted tubular part and / or of the second knitted tubular part.
- the hot-melt portion (s) is / are distributed over the first knitted tubular part, and optionally the second knitted tubular part (defined below), so as to allow thermoforming.
- the transformation step (iv) makes it possible, by supply of heat, to melt / soften the hot-melt portion (s), the footwear assembly is also compressed and pressed against the outer surface of the preform. Following the cooling of the footwear assembly, in particular to ambient temperature, maintained in pressure against the outer surface of the preform, the footwear assembly then permanently retains the shape of the foot of the preform.
- the melting or softening, then cooling, of one or more hot-melt portions (s) makes it possible to impart to the footwear assembly the foot shape of the preform, and optionally to secure the functional component (s) ( s) to the first tubular part.
- thermoforming can be carried out by applying one or more heat source (s) to the footwear set placed on the preform, for example using an iron manually.
- the thermoforming is carried out by placing the footwear assembly in a molding volume delimited on the one hand between the outer surface of the preform, and on the other hand, with the complementary imprint of the foot shape of the preform. formed by a mold, in particular in at least two parts, or formed by a flexible and deformable membrane (in particular airtight).
- a mold in particular in at least two parts, or formed by a flexible and deformable membrane (in particular airtight).
- the membrane can be in a flexible and deformable material, for example silicone or polyurethane.
- the membrane is by definition airtight.
- the flattening opening is through (and therefore in particular the segment (s) that it comprises), it therefore opens out both on the internal face (and therefore the internal volume of reception of the foot) and the outer face of the sole portion of the first tubular knitted envelope.
- the flattening opening is formed of a longitudinal segment having a length 11 greater than or equal to 50%, more preferably greater than or equal to 70%, in particular less than or equal to 90%, at the length of the sole portion comprising said flattening opening.
- the length of the sole portion is calculated as the greatest length measured between the front and rear edges of the sole portion.
- said flattening opening (s) is / are arranged in the sole part of the first knitted tubular part (and optionally in the sole part of the second knitted tubular part) .
- said at least one flattening opening is disposed in the sole portion of the first knitted tubular portion and also extends into the rear portion, and optionally into the rear leg portion (e.g. s (acting as a boot-type article of footwear), the first (and possibly the second) knitted tubular part.
- the functional component (s) can / can be joined together by means of the hot-melt portion (s) that the first knitted tubular part and / or the second part comprises / comprise tubular knitted fabric (defined below), and / or the hot-melt portion (s) that the functional component (s) (s) itself (s) comprise / comprises, and / or one or more adhesive means (s), in particular at least partly thermofusible.
- the adhesive means (s) is / are considered to be equivalent (s) to one or more functional component (s) according to the invention having an intermediate securing function .
- the functional component (s) according to the invention has / have at least one function chosen from the following functions: cushioning, reinforcement, adhesion, continuous or discontinuous protective coating, aesthetic, or a combination of the latter.
- the first knitted tubular part, and / or the second knitted tubular part can be knitted on a double needle bed flat knitting machine, or on a circular knitting machine.
- the first knitted tubular part and / or the second knitted tubular part is / are each, an envelope comprising a sole part (intended to come under the wearer's foot), a lateral part (intended to come in contact with the lateral side of the wearer's foot), a medial part (intended to come into contact with the medial side of the wearer's foot), a front part in the extension of the medial, lateral and sole parts (intended to cover the front of the foot), and a rear part in the extension of the medial, lateral and sole parts (intended to cover the rear of the foot, and therefore the heel, and possibly the ankle).
- the envelope can be arranged so as to cover all or part of the ankle and possibly extend above the malleolus.
- the front portion of the envelope may include a tongue and a distal pocket for receiving the toes.
- the tongue may be integral with the front part only along its front edge or integral with the front part, in addition to its front edge, along its lateral and medial edges respectively to the lateral and medial parts.
- the rear portion may include a pocket configured to receive the heel.
- the envelope preferably defines a volume or void intended to accommodate the wearer's foot.
- the first knitted tubular portion is of unitary knitted construction with the knitted shell such that the shell and the first knitted tubular portion comprise a single knitted piece.
- the second knitted tubular portion is of unitary knitted construction with the knitted shell such that the shell and the second knitted tubular portion are in a single knitted piece.
- the knitted piece forming the second knitted tubular part and the knitted piece forming the first knitted tubular part are secured to one another, in particular during the transformation step (iv), for example by sewing.
- first knitted tubular portion and the second knitted tubular portion are each in an envelope, the two envelopes being of unitary knitted construction with their respective first and second knitted tubular portions so as to comprise a single knitted piece.
- the first knitted tubular part and / or the second knitted tubular part comprises / comprise one or more threads, in particular mechanically assembled by knitting.
- the yarn (s) may be selected, independently, from: monofilament yarn (s), fiber spun yarn (s), multifilament yarn (s), and a combination of these latter.
- the yarn (s) can / can be non-hot-melt, at least partially hot-melt or totally hot-melt, or a mixture of the latter.
- the first knitted tubular part and / or the second knitted tubular part comprises / comprise (each) one or more yarn (s) at least partly hot-melt (s), and / or one or more non-hot-melt yarn (s) ( s).
- thermoforming of the footwear assembly and possibly the joining of the first and second tubular part (s) to each other.
- the footwear assembly can thus comprise one or more material (s) fusible by nature by application of heat (and therefore in the strict sense of the thermofusible (s)) but which will not be activated during step ( iv) because their melting temperature (s) is / are higher than the heating temperature (s) used during step (iv).
- This (these) material (s) is / are considered in the present text to be non-hot melt (s).
- the thermo-fusible wires in particular at least partially, can be wires comprising at least two components, in particular of the bi-corn laying type, a first component having a melting temperature less than or equal to the heating temperature (s) set. (s) implemented during step (iv), and a second component having a given melting or degradation temperature greater than the heating temperature (s) implemented during step ( iv).
- thermo-fusible wires can be single-component wires whose melting temperature is less than or equal to the heating temperature (s) used during step (iv).
- the bicomponent yarns can be of the core-mantle type, the core being formed from the second component and the mantle being formed from the first component.
- the first component can be chosen from polyurethanes, in particular thermoplastic polyurethanes; polyamides, such as polyamide 6 or 66; polyolefins, such as polypropylene (PP) or polyethylene (PE); preferably from polyurethanes.
- polyurethanes in particular thermoplastic polyurethanes; polyamides, such as polyamide 6 or 66; polyolefins, such as polypropylene (PP) or polyethylene (PE); preferably from polyurethanes.
- the second component can be chosen from polyolefins, such as high density polyethylene; polyamides, such as polyamide 4-6, polyamide 6 or 6-6; polyesters, such as polyethylene terephthalate.
- the bicomponent yarns can be of the core-mantle type, the core being formed from the second component and the mantle being formed from the first component.
- the first component and / or the second component may / may be colored (s) or colorless (s) and / or opaque (s) or transparent (s).
- the hot-melt component (s) have a melting or softening temperature lower (s) or equal (s) to the heating temperature (s).
- the heating temperature (s) applied to the footwear assembly during the transformation step (iii) is / are greater (s) or equal (s) to 80 ° C, again of preferably greater than or equal (s) to 90 ° C, preferably greater than or equal (s) to 100 ° C.
- the heating temperature (s) applied to the footwear assembly during processing step (iii) is / are less than or equal to 250 ° C, again of preferably less than or equal (s) to 200 ° C, preferably less than or equal (s) to 180 ° C.
- the yarn (s), in particular non-thermofusible (s), may / may comprise one or more material (s) chosen, independently, from synthetic, artificial (for example lyocell or viscose), natural, mineral materials or inorganic, and a combination of the latter, preferably from synthetic, artificial and natural materials, in particular synthetic.
- the synthetic material (s) preferably comprise: polyesters, in particular polyethylene terephthalate (PET) and polybutylene terephthalate (PBT); polyamides (such as PA 6, PA 6-6, PA 12, PA 4-6); polyolefins (polypropylene, polyethylene, PEEK, PEUHMW); aramids, in particular meta-aramid or para-aramid or a mixture of the latter; vinyl acetates (eg EVA), polyacrylics (eg polyacrylonitrile); elastomers; elasthanes, or a mixture of the latter, preferably polyesters and polyolefins.
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- polyamides such as PA 6, PA 6-6, PA 12, PA 4-6
- polyolefins polypropylene, polyethylene, PEEK, PEUHMW
- aramids in particular meta-aramid or para-aramid or a mixture of the latter
- the natural material (s) preferably comprise: cotton, viscose, linen, sisal, wool, jute, silk, hemp.
- the mineral or inorganic material (s) preferably comprise: carbon, mineral fibers, such as rock fiber, glass.
- the monofilament yarns preferably have a diameter greater than 0.01 mm and less than or equal to 5 mm, more preferably greater than or equal to 0.1 mm and less than or equal to 2 mm.
- the multifilament yarns and / or yarns spun fibers preferably have a count greater than or equal to 10 dtex and less than or equal to 1000 dtex, more preferably greater than or equal to 30 dtex and less than or equal to 500 dtex.
- Multifilament yarns can be FDY (Full Drawn Yarn), DTY (Draw Textured Yarn) or POY (Partially Oriented Yarn) textured yarns, or a mixture of these.
- the first and second knitted tubular part (s) may / may also comprise one or more elastic yarn (s), in particular made of elastane.
- the preform comprises an internal volume and perforations opening onto its external surface, said internal volume and the perforations are in fluid connection, preferably the perforations open into the internal volume of the preform.
- the perforations are distributed over the entire exterior surface of the preform intended to come into contact with the footwear assembly.
- the preform comprises a sole part (intended to come into contact with the sole part of the casing defined above), a lateral part (intended to come into contact with the lateral side of the casing defined above) , a medial part (intended to come into contact with the medial side of the envelope defined above), a front part in the extension of the medial, lateral and sole parts (intended to cover the front of the foot of the envelope defined above), and a rear part in the extension of the medial, lateral and sole parts (intended to cover the rear of the foot, and therefore the heel, and possibly the ankle of the envelope defined above) .
- the preform comprises perforations in at least one of the aforementioned parts, in particular in each of the aforementioned parts.
- the perforations comprise substantially circular perforations.
- the perforations comprise (or consist of) perforations whose largest dimension is circumscribed in a circle whose diameter is greater than 1 mm, more preferably greater than or equal to 3 mm, preferably greater than or equal to equal to 6 mm, in particular less than or equal to 20 mm, in particular less than or equal to 10 mm.
- the ratio of the total sum (cm 2 ) of the areas of the perforations (cm 2 ) to the total area (cm 2 ) of the outer surface (cm 2 ) of the preform is less than or equal to 60% , preferably less than or equal to 40%, more preferably less than or equal to 25%, in particular greater than or equal to 10%.
- the heat in fact circulates through the footwear assembly but also through the perforations of the preform towards its interior volume, and conversely from its interior volume, through the perforations towards the footwear assembly.
- This arrangement makes it possible to further improve the aesthetic and mechanical qualities of the upper by the homogeneous distribution of heat, and optionally of a flow of gas (x), in particular water vapor, combined, over the footwear assembly.
- a flow of gas (s), in particular water vapor, is sent to the footwear assembly during transformation step (iv), in particular through the perforations of the preform.
- This arrangement makes it possible to soften the rod obtained.
- the rod obtained has an even more regular shape, and therefore a better appearance, and its mechanical properties are improved (for example better reproducibility of tear resistance, elongation at break, better peel resistance).
- the rod obtained also has an improved feel, in particular a softer feel.
- the water vapor would act as a plasticizer on the textile and / or polymeric elements that the footwear assembly comprises, in particular the inserts and / or second knitted tubular part (s).
- the exterior surface of the preform comprises at least one metal.
- the outer surface of the preform comprises at least one metal alloy, in particular a ferrous or non-ferrous alloy.
- step (iii) makes it possible to considerably reduce the duration of step (iii) because the said minus one metal or the metal alloy (s), has / have better thermal conductivity than plastic or composite preforms. of the state of the art.
- thermoforming time is reduced by two with the use of the preform according to the invention, from 80 seconds to less than 40 seconds.
- the entire exterior surface of the preform comprises at least one metal or one metal alloy.
- the preform in its entirety, is in at least one metal or a metal alloy, or optionally in a glass-ceramic material.
- Said at least one metal or metal alloy is preferably chosen from: aluminum, iron, stainless steel, or a combination of these.
- the outer surface of the preform comprises a glass-ceramic material, in particular the outer surface of the preform is made of a glass-ceramic material.
- the preform in particular its outer surface, undergoes a physical and / or chemical surface treatment.
- This arrangement makes it possible to give the preform one or more additional thermal and / or mechanical property (s), in particular to improve the properties of resistance to corrosion, wear or impact, which optimize the use of the preform.
- the sole portion of the first tubular portion includes a rear edge and a front edge, and the flattening opening extends longitudinally between the rear edge and the front edge.
- the first knitted tubular part is placed, at least partially, substantially flat, during step (iii), on a support, so as to present an upper flat portion to be functionalized opposite to a lower flat portion comprising said flattening opening.
- the lateral edge and the medial edge of the flattening opening are joined edge to edge.
- the method comprises providing a second knitted tubular portion, optionally comprising at least one hot-melt portion, and the footwear assembly in step (iv) comprises the first and second knitted tubular portions, at least in part. , superimposed, in conjunction with one or more functional component (s).
- the sole portion of the second knitted tubular portion comprises at least one flattening opening (similar to that provided in the first knitted tubular portion), in particular of unitary knitted construction with the second knitted tubular portion. This flattening opening is therefore also formed during the knitting of the second part and allows the flattening of the second part in order to functionalize it during step (iii).
- the second knitted tubular part does not include a flattening opening.
- the transformation step (iv) allows the at least partial joining of the first and second tubular parts knitted together.
- the first and second knitted tubular parts are joined together following the fusion of one or more hot-melt portion (s), which at least one of the first and second tubular parts comprises.
- the outer face of the second knitted tubular part is secured to at least a portion of the inner face of the first knitted tubular part, said securing portions comprise at least partially heat-melted threads.
- the first knitted tubular part forms an outer layer of the footwear assembly.
- the second knitted tubular part forms an outer layer of the footwear assembly.
- a functional component chosen from the functional component (s), is placed on at least one face chosen from: the outer face of the first knitted tubular part, the inner face of the first tubular part knitted, or a combination thereof.
- a functional component chosen from the functional component (s), is placed on at least one side chosen from: the outer face of the second knitted tubular part, the inner face of the second tubular part knitted, or a combination thereof.
- a functional component chosen from the functional component (s), is a film comprising at least one hot-melt material.
- said film forms a coating (or has dimensions determined so as to form a coating) covering at least 10%, preferably at least 25%, more preferably at least 40% , preferably at least 50%, even more preferably at least 70%, in particular at least 80%, or 98% to within +/- 2%, of the outer surface of the upper (or of the first or second knitted tubular part) , in particular with the exception of the outer surface of the sole part of the upper (or even of the first or second knitted tubular part).
- said film forms a coating covering at most 50%, preferably at most 30%, of the outer surface of the rod (or of the first or second knitted tubular part), in particular with the exception of the outer surface of the sole part of the upper (or even of the first or second knitted tubular part).
- the coating can be continuous or discontinuous, and / or in the form of pattern (s) (identical (s) or different (s)) and / or point (s), but overall covering the aforementioned% of the outer surface).
- the upper flat portion not being completely accessible, it is not possible to have a film covering a large area of the outer surface of the rod.
- at least one of the functional component (s) is chosen from: a polymeric film at least partially thermofusible, a heel reinforcement element, a logo, an aesthetic element, a hard toe, a reinforcing element of a lacing zone, a cushioning element, an auxiliary knitted tubular part, a textile element, or a combination thereof.
- At least one of the functional component (s) is a damping element, in particular a foam.
- At least one of the functional component (s) is chosen from: an at least partially thermofusible polymeric film, a heel reinforcement element, a logo, an aesthetic element, a hard toe, a piece of reinforcement of a lacing zone, or a combination of these.
- the textile element may comprise one or more woven, knitted, non-woven element (s) or a combination thereof.
- the auxiliary knitted tubular portion may be the same or different from the first knitted tubular portion.
- the description relating to the first or second tubular part applies to the auxiliary tubular part.
- the method comprises providing a knitted tubular component, and the first knitted tubular portion and the second knitted tubular portion are of unitary knitted construction with the knitted tubular component so as to form a one-piece knitted member.
- the method comprises the arrangement of at least one functional component between the first knitted tubular part and the second knitted tubular part, in particular during step (iii) and / or during step (iv).
- first knitted tubular portion forms an outer layer of the upper and the second knitted tubular portion forms an inner layer of the upper.
- the first knitted tubular forms an inner layer of the upper
- the second knitted tubular portion forms an outer layer of the upper
- the first knitted tubular part comprises one or more yarn (s) at least in part thermofusible (s), the ratio of the mass of the yarn (s) at least in part thermofusible (s) to the total mass of the first knitted tubular part, is greater than or equal to 20%, preferably greater than or equal to 40%, more preferably greater than or equal to 60%, in particular greater than or equal to 80%.
- the second knitted tubular part comprises one or more hot-melt yarn (s), the ratio of the mass of the at least partially hot-melt yarn (s) to the total mass of the second part tubular knitted, is less than or equal to 80%, preferably less than or equal to 60%, more preferably is less than or equal to 40%, in particular less than or equal to 20%.
- the first knitted tubular part comprises an opening zone for introducing the foot and the second knitted tubular part comprises an opening zone for introducing the foot, said zones for introducing the opening of the foot are superimposed.
- the at least partially thermofusible yarn (s) form (s) said at least one hot-melt portion, preferably having a melting or softening temperature less than or equal to T1, which is preferably less or equal to the heating temperature (s).
- step (iv) comprises heating the preform to a heating temperature greater than or equal to Tp, with Tp> Tl.
- step (iv) comprises heating the molding volume to a heating temperature greater than or equal to Tvm, with Tvm> Tl.
- the temperatures Tp and Tvm can be the same or different.
- the upper obtained in step (iv) comprises a sole part
- the method comprises the joining of at least one sole element chosen from an intermediate sole, and an outsole to said part of the sole. sole.
- Figure 1 illustrates a first example of a tubular knitted component comprising first and second knitted tubular portions
- Figure 2 illustrates the first knitted tubular part of the component shown in Figure 1, seen from below;
- FIG. 3 shows a second example of a knitted tubular component
- FIG. 4 represents the first knitted tubular part of the component shown in FIG. 1 partially flattened on a support seen from above;
- FIG. 5 illustrates the first knitted tubular part of the component shown in FIG. 1 partially flattened on a support seen from below;
- Figure 6 illustrates the closed longitudinal flattening opening of the sole portion of the first knitted tubular portion of the component of Figure 1;
- FIG. 7 illustrates an example of a footwear assembly arranged on the outer surface of a preform, in longitudinal section
- FIG. 8 illustrates the footwear assembly disposed on the outer surface of a preform disposed in a molding volume for step (iv);
- FIG. 9 illustrates an example of an article of footwear according to the invention comprising an upper obtained at the end of the transformation step (iv).
- FIG. 1 shows a first example of a knitted tubular component 10 in one piece 15, comprising a first knitted tubular portion 20 and a second knitted tubular portion 30, each being angled.
- the knitted tubular component 10 thus has a substantially U-shape.
- the first and second knitted tubular pieces 20,30 are of unitary knitted construction with the knitted tubular component 10.
- the first knitted tubular portion 20 includes an open distal end 22, which will be unitary. preferably closed by a seam before placing on the preform 50, an open proximal end 24 delimiting a zone for introducing the foot 26, as well as a reception volume 28 for the foot.
- the second knitted tubular part 30 comprises a distal end 32 closed during knitting of the tubular component 10, and an open proximal end 34 delimiting a zone for introducing the foot 36 as well as a reception volume 38 for the foot.
- the first and second knitted tubular portions 20,30 comprise respective heel areas 25,35 for receiving the heel of the user's foot. It is determined, when programming the knitting machine to knit the knitted tubular component 10, the zoning of the first and second knitted tubular parts 20,30 according to different stitch patterns (purl stockinette, knit stockinette, ribbed stitches, ... ) and different types of yarns (by their nature and / or color and / or transparency and / or title (dtex)).
- first knitted tubular part 20 and the second knitted tubular part 30 may include an elbow portion such that the tubular component 10 has a general L-shape.
- the first knitted tubular part 20 comprises threads at least in part thermofusible arranged in one or more portions.
- the second knitted tubular part 30 may also include one or more hot-melt portions formed of at least partially hot-melt yarns.
- the at least partly thermofusible yarns represent, for example at least 30% by mass, and at most 60% by mass, of the total mass of the first knitted tubular part, and are distributed over the entire latter.
- the first knitted envelope 20 consists essentially of hot-melt yarns.
- the at least partially thermofusible yarns represent, for example at least 50% by mass, and at most 80% by mass, of the total mass of the second knitted tubular part, and are distributed over the entire latter. This arrangement can of course vary depending on the stability and flexibility sought.
- FIG. 2 shows the first knitted tubular part 20 seen from below, the sole part 27 of which comprises a longitudinal flattening opening 29 disposed between the front 27a and rear 27b edges.
- the longitudinal opening 29 is through, that is to say that it opens out both on the external face 21 and the internal face 23 of the first knitted tubular part 20.
- the opening 29 is formed from a single segment substantially rectilinear.
- the longitudinal opening 29 is delimited by a medial edge 29a and a lateral edge 29b, and has a length 11 of between 50% and 90% of the length p of the sole portion 27, preferably between 60% and 80% of the length p.
- FIG. 3 shows a second example of a knitted tubular component 100 also in one piece 150, comprising first and second knitted tubular parts 200 and 300.
- the knitted tubular component 100 is substantially rectilinear, the first and second tubular portions 200 and 300 are not including no angled portions.
- the sole portion 270 includes a longitudinal opening 290 similar to the longitudinal opening 29.
- the longitudinal opening 29 of the knitted tubular component 10 makes it possible to lay the first tubular part 20 flat on a support S as shown in FIG. 4 seen from above for its functionalization, here of the external face 21 of the front parts. foot, medial and lateral of the first knitted tubular portion 20.
- Figure 4 thus shows an upper planar portion 42 of the first knitted tubular portion 20, opposite a lower planar portion 44 shown in Figure 5.
- the open distal end 22 can be closed before or after the functionalization step (iii) to form the toe receiving the toes of the first knitted tubular part 20.
- the longitudinal opening 29 for flattening is formed during the knitting of the first knitted tubular part 20, and therefore of the knitting of the knitted tubular component 10.
- the medial and lateral edges 29a and 29b preferably do not include cut yarns, they can for example be formed by transfer of stitches, so that they do not risk s 'fray.
- the unraveling of the edges could indeed alter the structure of the sole part 27 and propagate towards the other parts of the first knitted tubular part 20.
- the longitudinal opening 29 formed by knitting makes it possible to eliminate a cutting step, to form an opening whose positioning and size are reproducible but also improve the stability of the structure during flat functionalization.
- the functional components 75 are secured to the external face 21, for example by a seam, or a weld (in particular thermal, for example by ultrasound) or using an adhesive agent.
- the functional components 75 are cited without limitation for purposes of illustration, other functional components could be implemented and according to different regions on the external face 21 and / or the internal face 23 of the first knitted tubular part. 20.
- the size and location chosen for the functional components are however limited to the planar available surface shown in Figure 4.
- the second knitted tubular portion 30 is not shown for reasons of simplification in Figures 4 and 5.
- the outer face 23 is available for its functionalization but the first knitted tubular part 20 could be turned over and flattened to functionalize its internal face 21.
- the footwear assembly 40 also comprises a component.
- the functional 60 which is a heel reinforcement and functional component 70 which is an instep cushioning element.
- the functional components 60 and 70 are disposed between the first and second knitted tubular portions 20 and 30, respectively between the forefoot portions and the rearfoot portions at the heel.
- the functional component 60 extends vertically from the longitudinal axis L.
- These components 70 and 60 are not shown in Figures 4 and 5 for reasons of simplification, but are preferably secured to the internal face 23 of the upper flat portion 42 of the first knitted tubular part 20.
- the longitudinal opening 29 is then closed, in particular using a seam 35 in order to re-volume the footwear assembly 40, then the footwear assembly 40 is placed on a preform 50 as shown in FIG. 7 in order to undergo a transformation step (iv) during which the preform 50 coated with the footwear assembly 40 is placed in a molding volume 80.
- the molding volume 80 is defined between on the one hand the preform 50 coated with the footwear assembly 40, and on the other hand, the volume formed by a mold 90 in two parts 95 and 96.
- the volume interior of the mold 90 corresponding substantially to the footprint of the foot-shaped preform 50.
- the molding volume can also be delimited between the exterior surface of the preform 50 and a waterproof flexible membrane, comprising a shape substantially hollow foot from the footwear assembly arranged on the preform 50.
- Heat is then applied to the footwear assembly 40, in particular combined with water vapor, in order to thermoform the footwear assembly 40 to the shape of the foot of the preform 50.
- the hot-melt portion (s) ( s) that the first knitted tubular part 20 comprises, and optionally that the second knitted tubular part 30 comprises, is / are melted / softened during the processing step (iv), the footwear assembly 40 is also compressed against the outer surface of the preform 50.
- the footwear assembly 40 still on the preform 50, is then cooled, in particular to room temperature, and then retains the shape of the outer surface of the preform 50.
- This step transformation (iv) also allows the thermoforming to join together the first and second knitted tubular parts 20 and 30 in particular at least in part along their inner 23 and outer 31 respective faces.
- the knitted tubular component 10 can alternatively comprise only the first knitted tubular part 20.
- the transformation step only allows the thermoforming of the first knitted tubular part, without joining.
- first knitted tubular part 20 can be placed in the internal volume 38 of the second knitted tubular part 30.
- the second knitted tubular part then forms the outer layer of the footwear assembly and the first knitted tubular part forms the inner layer.
- the preform may also include perforations, in particular having a diameter of about 5mm to 10mm, opening onto an interior volume of the preform so that the perforations and the interior volume of the preform are in fluid connection.
- perforations in particular having a diameter of about 5mm to 10mm, opening onto an interior volume of the preform so that the perforations and the interior volume of the preform are in fluid connection.
- the transformation step (iv) allows the formation of an upper 400, the sole part 450 of which is then secured to a sole element 500 to obtain the article of footwear 1 shown in FIG. 9.
- the upper 400 can thus comprise different knitted zones 401 to 406 for the first knitted tubular part 20.
- the zones 401 to 406 different by their mesh patterns, their colors, their elasticities, or their rigidities.
- the zones 406 thus correspond to knitted unidirectional reinforcing elements reinforcing the medial and lateral parts of the upper 400.
- the flattening opening shown in the figures is a longitudinal opening, of course, the opening may have a cross shape or other shape as long as the shape of this opening allows the tubular part to be flattened. knitted including it.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1908054A FR3098688B1 (fr) | 2019-07-17 | 2019-07-17 | Procédé de fabrication d’un article chaussant |
| PCT/EP2020/070233 WO2021009328A1 (fr) | 2019-07-17 | 2020-07-16 | Procede de fabrication d'un article chaussant |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3998895A1 true EP3998895A1 (fr) | 2022-05-25 |
| EP3998895B1 EP3998895B1 (fr) | 2025-03-26 |
| EP3998895C0 EP3998895C0 (fr) | 2025-03-26 |
Family
ID=68343100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20743644.5A Active EP3998895B1 (fr) | 2019-07-17 | 2020-07-16 | Procede de fabrication d'un article chaussant |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12207698B2 (fr) |
| EP (1) | EP3998895B1 (fr) |
| CN (1) | CN114364278B (fr) |
| ES (1) | ES3026234T3 (fr) |
| FR (1) | FR3098688B1 (fr) |
| WO (1) | WO2021009328A1 (fr) |
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|---|---|---|---|---|
| IT202000001459A1 (it) * | 2020-01-24 | 2021-07-24 | Trere Innovation S R L | Struttura e procedimento di realizzazione di una scarpa con tomaia in maglia. |
| WO2025029676A1 (fr) * | 2023-07-28 | 2025-02-06 | Futurestitch, Inc. | Article chaussant multicouche et ses procédés de fabrication |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1332969A (fr) * | 1961-09-09 | 1963-07-19 | Bama Werk Curt Baumann | Chaussure intermédiaire, destinée à être portée dans des souliers grossiers |
| EP2805638B1 (fr) * | 2012-01-20 | 2017-03-15 | Shima Seiki Mfg., Ltd | Chaussure, et procédé de tricotage pour un tissu tricoté |
| TW201412258A (zh) * | 2012-09-25 | 2014-04-01 | Long John Tsung Right Ind Co Ltd | 立體鞋面之織造方法 |
| FR2999882B1 (fr) * | 2012-12-21 | 2015-06-12 | Salomon Sas | Chaussure realisee a partir d'une chaussette et d'une structure de renfort |
| US10159297B2 (en) * | 2013-05-21 | 2018-12-25 | Bradford C. Jamison | Patterned plexus of filaments, method of producing and articles containing patterned filaments |
| US20150230544A1 (en) * | 2014-02-14 | 2015-08-20 | W. L. Gore & Associates, Gmbh | Conformable Booties, Shoe Inserts, and Waterproof Breathable Socks Containing An Integrally Joined Interface |
| FR3024022B1 (fr) | 2014-07-22 | 2017-04-28 | Salomon Sas | Article chaussant a structure amelioree |
| EP4524308A3 (fr) * | 2016-07-21 | 2025-05-07 | NIKE Innovate C.V. | Article chaussant à couches multiples, système de retenue pour un article chaussant |
| US10327498B2 (en) * | 2017-05-20 | 2019-06-25 | Wolverine Outdoors, Inc. | Method of making knit footwear having an integral footbed |
| US11457685B2 (en) * | 2017-05-30 | 2022-10-04 | Nike, Inc. | Double layer, single tube braid for footwear upper |
| TWI643571B (zh) * | 2017-09-29 | 2018-12-11 | 双邦實業股份有限公司 | 圓管針織鞋之製法 |
| US20190116932A1 (en) * | 2017-10-20 | 2019-04-25 | Nike, Inc. | Article of footwear with an outer element and an inner element |
| DE102017223746B4 (de) * | 2017-12-22 | 2024-03-14 | Adidas Ag | Rundstrick-Schuhoberteil |
| DE102017223737B4 (de) * | 2017-12-22 | 2025-08-28 | Adidas Ag | Verfahren zur Herstellung eines Schuhoberteils |
| DE102018212632B4 (de) * | 2018-07-27 | 2024-03-14 | Adidas Ag | Gestricktes oder gewirktes Oberteil für einen Schuh und Verfahren zu dessen Herstellung |
-
2019
- 2019-07-17 FR FR1908054A patent/FR3098688B1/fr active Active
-
2020
- 2020-07-16 EP EP20743644.5A patent/EP3998895B1/fr active Active
- 2020-07-16 ES ES20743644T patent/ES3026234T3/es active Active
- 2020-07-16 CN CN202080062802.9A patent/CN114364278B/zh active Active
- 2020-07-16 WO PCT/EP2020/070233 patent/WO2021009328A1/fr not_active Ceased
- 2020-07-16 US US17/627,144 patent/US12207698B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3098688A1 (fr) | 2021-01-22 |
| EP3998895B1 (fr) | 2025-03-26 |
| WO2021009328A1 (fr) | 2021-01-21 |
| CN114364278B (zh) | 2024-11-01 |
| CN114364278A (zh) | 2022-04-15 |
| US20220354218A1 (en) | 2022-11-10 |
| US12207698B2 (en) | 2025-01-28 |
| ES3026234T3 (en) | 2025-06-10 |
| FR3098688B1 (fr) | 2022-02-25 |
| EP3998895C0 (fr) | 2025-03-26 |
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