FR2625943A1 - Method for producing composite belts, and composite belts obtained - Google Patents

Method for producing composite belts, and composite belts obtained Download PDF

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Publication number
FR2625943A1
FR2625943A1 FR8800522A FR8800522A FR2625943A1 FR 2625943 A1 FR2625943 A1 FR 2625943A1 FR 8800522 A FR8800522 A FR 8800522A FR 8800522 A FR8800522 A FR 8800522A FR 2625943 A1 FR2625943 A1 FR 2625943A1
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France
Prior art keywords
synthetic material
elements
composite belts
calender
belts
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Granted
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FR8800522A
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French (fr)
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FR2625943B1 (en
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Priority to FR8800522A priority Critical patent/FR2625943B1/en
Publication of FR2625943A1 publication Critical patent/FR2625943A1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B7/00—Special leathers and their manufacture
    • C14B7/02—Composite leathers
    • C14B7/04—Composite leathers by cementing or pressing together leather pieces, strips or layers, Reinforcing or stiffening leather by means of reinforcing layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/02—Driving-belts made of leather
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/02—V-belts, i.e. belts of tapered cross-section made of leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/08—Natural leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2331/00—Polyvinylesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2375/00—Polyureas; Polyurethanes

Abstract

For the traction element 9, use is made of a synthetic material of a fusion-bondable nature, so that the assembly to the element 1 made of leather can be performed by heating (device 11) the surface of the element 9 before allowing the two elements to pass between the rolls of a calender 4-5. The patent also describes the method for joining the two ends of the belt, this joining also being carried out by melting of the synthetic material.

Description

On sait que si Les courroies en cuir ont d'excellentes qualités d'adhérence sur les poulies, l'effort de traction qu'elles sont susceptibles de transmettre est par contre relativement limité. La situation est inversée pour Les courroies en matière synthétique, en ce sens que si elles sont capabLes de supporter des efforts très importants sans risque de rupture ou d'usure précoce, eLLes comportent une tendance certaine au glissement, tout particulièrement lorsqu'eLles coopèrent avec des pouLies à petit diamètre placées dans des ambiances huileuses. We know that if the leather belts have excellent grip qualities on the pulleys, the tensile force that they are capable of transmitting is on the other hand relatively limited. The situation is reversed for synthetic belts, in the sense that if they are able to withstand very large forces without risk of breakage or early wear, they have a certain tendency to slip, especially when they cooperate with small diameter pulleys placed in oily atmospheres.

Aussi a-t-on depuis Longtemps proposé des courroies composites, constituées par l'assemblage d'un élément de traction en matière synthétique et d'un élément d'adhérence en cuir, notamment en cuir chromé.Therefore, composite belts have long been proposed, constituted by the assembly of a traction element in synthetic material and an adhesion element in leather, in particular in chromed leather.

De telles courroies composites donnent-satisfaction puisqu'elles permettent ce tirer parti des qualités des deux éléments constitutifs, sans supporter les inconvénients de ceux-ci. Toutefois, leur fabrication soulève des problèmes au niveau de l'assemblage mutuel des deux éléments et de la jonction des extrémités. Such composite belts give satisfaction since they allow this to take advantage of the qualities of the two constituent elements, without supporting the drawbacks of these. However, their manufacture raises problems in terms of the mutual assembly of the two elements and the joining of the ends.

C'est à La solution de ces problèmes qu'entend plus spécialement s'attacher la présente invention, laquelle a pour objet un procédé de réalisation conformément auquel on déroule à La même vitesse un élément d'adhérence en cuir et un élément de traction en une matière synthétique de nature thermosoudable, on chauffe la face de cet élément de traction qui est tournée en direction de l'élément d'adhérence, et on fait simultanément passer les deux éléments entre les cylindres d'une calandre de façon à opérer L'assemblage définitif desdits éléments à L'aide de la matière synthétique en fusion. It is to the solution of these problems that the present invention more specifically intends to focus, which relates to a production method in accordance with which an adhesion element of leather and a traction element are unwound at the same speed. a synthetic material of heat-sealable nature, the face of this traction element which is turned towards the adhesion element is heated, and the two elements are simultaneously passed between the cylinders of a calender so as to operate L ' final assembly of said elements using synthetic molten material.

On conçoit que le recours à une matière synthétique de nature thermosoudable permet de se dispenser de L'opération d'encolLage du processus classique. Non seulement la fabrication est simplifiée, mais en pLus L'assemblage obtenu est sensiblement renforcé par suite de sa régu larité. Ce même avantage se retrouve au niveau de la jonction des extrémités des deux éléments d'une courroie composite suivant l'invention, cette jonction étant assurée par La matière synthétique en fusion. It is understood that the use of a synthetic material of a heat-weldable nature makes it possible to dispense with the sizing operation of the conventional process. Not only is the manufacturing simplified, but more The assembly obtained is significantly strengthened as a result of its regularity. This same advantage is found at the junction of the ends of the two elements of a composite belt according to the invention, this junction being provided by the synthetic material in fusion.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :
Fig. 1 est une coupe verticale illustrant la mise en oeuvre du procédé de réalisation suivant l'invention, en ce qui concerne l'assemblage des deux éléments d'une courroie composite. The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
Fig. 1 is a vertical section illustrating the implementation of the production method according to the invention, as regards the assembly of the two elements of a composite belt.

Fig. 2 à 5 illustrent en perspective et en coupe les différentes phases du processus adopté pour la jonction des extrémités d'une telle courroie. Fig. 2 to 5 illustrate in perspective and in section the different phases of the process adopted for joining the ends of such a belt.

En fig. 1, la référence 1 désigne l'élément d'adhérence en cuir qui est déroulé à partir d'une réserve 2 et qui est guidé, par exemple par un tambour de renvoi 3, pour passer entre les deux cylindres superposés 4 et 5 d'une calandre appropriée. On observera que le cylindre supérieur 4 est porté par un chassis 6 qui est susceptible de se déplacer verticalement par rapport au bâti fixe 7 et qui est associé à des moyens élastiques 8, ceux-ci tendant de la sorte à appliquer la périphérie du cylindre 4 contre celle du cylindre 5. In fig. 1, the reference 1 designates the leather grip element which is unwound from a reserve 2 and which is guided, for example by a return drum 3, to pass between the two superimposed cylinders 4 and 5 of an appropriate grille. It will be observed that the upper cylinder 4 is carried by a chassis 6 which is capable of moving vertically relative to the fixed frame 7 and which is associated with elastic means 8, these tending in such a way to apply the periphery of the cylinder 4 against that of cylinder 5.

L'élément d'adhérence 1 est destiné à être assemblé à un élément de traction 9 réalisé en une matière synthétique de nature thermosoudable, par exemple en un élastomère du genre du polyester ou du polyuréthane. The adhesion element 1 is intended to be assembled with a traction element 9 made of a synthetic material of heat-sealable nature, for example an elastomer of the kind of polyester or polyurethane.

Cet élément 9 est déroulé à partir d'une réserve 10 pour être amené à la calandre 4-5 de manière horizontale, substantiellement au niveau du profil supérieur du cylindre inférieur 5.This element 9 is unwound from a reserve 10 to be brought to the grille 4-5 horizontally, substantially at the level of the upper profile of the lower cylinder 5.

Entre les deux brins convergents des éléments 1 et 9, animés de La même vitesse d'avancement par La calandre, on a prévu un dispositif de chauffage 11 qui peut être de tout type approprié. Il peut notamment s'agir d'une buse de soufflage d'air chaud, cet air étant pulsé de façon à venir frapper la face de l'élément de traction 9 qui est tournée vers le haut, c'est-à-dire en direction de l'élément d'adhérence 1. Between the two converging strands of the elements 1 and 9, animated by the same forward speed by the calender, a heating device 11 has been provided which can be of any suitable type. It may in particular be a hot air blowing nozzle, this air being pulsed so as to strike the face of the traction element 9 which faces upwards, that is to say in direction of the adhesion element 1.

On comprend que le chauffage ainsi opéré provoque la fusion superficielle de La matière synthétique qui constitue l'élément 9, si bien que ce dernier se trouve soudé à l'élément en cuir 1 par suite de l'écrasement assuré par les deux cylindres 4 et 5 de la calandre. L'article composite 1-9 ainsi obtenu est enroulé à la sortie de cette calandre, afin de former un enroulement tel que celui indiqué en 12. Par suite du soudage réalisé, l'assemblage intéresse toute la surface commune aux deux éléments 1 et 9, sans aucune lacune, ce qui permet la fabrication d'un article parfaitement homogène. It is understood that the heating thus operated causes the surface fusion of the synthetic material which constitutes the element 9, so that the latter is welded to the leather element 1 as a result of the crushing ensured by the two cylinders 4 and 5 of the grille. The composite article 1-9 thus obtained is wound at the outlet of this calender, in order to form a winding such as that indicated in 12. As a result of the welding carried out, the assembly involves the entire surface common to the two elements 1 and 9 , without any gaps, which allows the production of a perfectly homogeneous article.

Il va de soi que les éléments 1 et 9 peuvent présenter une largeur supérieure à celle des courroies composites à obtenir, auquel cas l'article 1-9 est soumis à une opération de coupe longitudinale avant d'être sectionné transversalement à la longueur désirée. It goes without saying that the elements 1 and 9 may have a width greater than that of the composite belts to be obtained, in which case the article 1-9 is subjected to a longitudinal cutting operation before being sectioned transversely to the desired length.

Pour assembler les deux extrémités à bord transversal rectiligne (voir fig. 2) après sectionnement à la longueur, on taille sur Le bord de l'élément d'adhérence 1 un biseau à 450 la qui se trouve légèrement en retrait du bord libre de l'élément de traction 9, comme illustré en fig. 3 et 4. A L'aide d'un fer à souder 13 à chaleur régulée, on échauffe les bords terminaux en vis-à-vis de l'élément 9, et immédiatement après on procède au rapprochement de ces deux bords, à la manière montrée en fig. 5, jusqu'à ce que Les bords de l'élément d'adhérence 1 viennent au contact L'un de l'autre.  To assemble the two ends with a straight transverse edge (see fig. 2) after cutting to length, a bevel at 450 la is cut on the edge of the adhesion element 1 which is slightly set back from the free edge of the 'traction element 9, as illustrated in fig. 3 and 4. Using a soldering iron 13 with controlled heat, the terminal edges are heated opposite the element 9, and immediately afterwards these two edges are brought together, at the shown in fig. 5, until the edges of the adhesion element 1 come into contact with one another.

On conçoit que Le chauffage préalabLement exercé à L'aide du fer 13 a provoqué la fusion de la matière synthétique de l'élément 9, si bien que la masse fondue vient constituer un amalgame 9a dans l'espace ménagé entre les deux biseaux la. Ainsi, la jonction obtenue par thermosoudage intéresse-t-elle non seulement les extrémités de l'élément 9, mais également celles de l'element d'adhérence 1. It will be understood that the heating previously exercised with the aid of the iron 13 caused the synthetic material of the element 9 to melt, so that the molten mass forms an amalgam 9a in the space formed between the two bevels la. Thus, the junction obtained by heat sealing interests not only the ends of the element 9, but also those of the adhesion element 1.

En certains cas, il peut être avantageux de prévoir l'arasement de la surepaisseur éventuellement formée sur l'une etlou l'autre des deux faces de la jonction obtenue, mais en tout état de cause le temps nécessaire à La réalisation de cette jonction reste très largement inférieur à celui de L'opération classique par enduction de deux coLLes différentes. In certain cases, it may be advantageous to provide for the leveling of the extra thickness possibly formed on one and / or the other of the two faces of the junction obtained, but in any event the time necessary for the realization of this junction remains very much lower than that of the classic operation by coating two different beads.

IL doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'etle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.  It should moreover be understood that the above description has been given only by way of example and that etle in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims (4)

R E V E N D I C A T I O N S R E V E N D I C A T I O N S 1. Procédé pour la réalisation de courroies composites comprenant un élément de traction (9) en matière synthétique et un élément d'adhérence (1) en cuir rendus solidaires l'un de l'autre, caractérisé en ce qu'il consiste à dérouler à la même vitesse L'élément (1) et l'élément (9), ce dernier étant en une matière synthétique de nature thermosoudable, à chauffer la face de L'élément (9) qui est tournée en direction de l'élément (1), et à faire simultanément passer les deux éléments (1, 9) entre les cylindres (4, 5) d'une calandre de façon à opérer leur assemblage définitif à l'aide de la matière synthétique en fusion. 1. Method for producing composite belts comprising a traction element (9) of synthetic material and an adhesion element (1) of leather made integral with each other, characterized in that it consists in unwinding at the same speed The element (1) and the element (9), the latter being of a synthetic material of heat-sealable nature, to heat the face of the Element (9) which is turned in the direction of the element ( 1), and simultaneously passing the two elements (1, 9) between the cylinders (4, 5) of a calender so as to effect their final assembly using the molten synthetic material. REVENDICATIONS 2. Procédé suivant la revendication 1, caractérisé en ce que l'un (4) des cylindres de la calandre est élastiquement appliqué contre les deux éléments (1, 9) à assembler. 2. Method according to claim 1, characterized in that one (4) of the cylinders of the calender is elastically applied against the two elements (1, 9) to be assembled. 3. Procédé suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que pour la jonction des extrémités transversales de l'article composite (1-9) destiné former la courroie, on taille sur le bord transversal de L'élément (1) un biseau (la) disposé en retrait par rapport au bord correspondant de L'élément (9), on chauffe les deux bords en vis-à-vis de cet élément (9), et on rapproche à force les deux extrémités à réunir de façon à ce que la matière en fusion vienne former un amalgame (9a) dans l'espace ménagé par les biseaux (la) de l'élément (1). 3. Method according to any one of claims 1 and 2, characterized in that for the junction of the transverse ends of the composite article (1-9) intended to form the belt, the size is cut on the transverse edge of the element ( 1) a bevel (la) set back relative to the corresponding edge of the element (9), the two edges are heated opposite this element (9), and the two ends are forcibly brought closer to join together so that the molten material comes to form an amalgam (9a) in the space provided by the bevels (la) of the element (1). 4. Courroies composites comprenant un élément de traction (9) en matière synthetique et un élément d'adhérence (1) en cuir rendus solidaires l'un de L'autre, caractérisées en ce qu'elles sont obtenues par mise en oeuvre du procédé suivant l'une quelconque des revendications 1 à 3.  4. Composite belts comprising a traction element (9) made of synthetic material and an adhesion element (1) of leather made integral with one another, characterized in that they are obtained by implementing the method according to any one of claims 1 to 3.
FR8800522A 1988-01-14 1988-01-14 PROCESS FOR PRODUCING COMPOSITE BELTS, AS WELL AS COMPOSITE BELTS OBTAINED Expired - Lifetime FR2625943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8800522A FR2625943B1 (en) 1988-01-14 1988-01-14 PROCESS FOR PRODUCING COMPOSITE BELTS, AS WELL AS COMPOSITE BELTS OBTAINED

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8800522A FR2625943B1 (en) 1988-01-14 1988-01-14 PROCESS FOR PRODUCING COMPOSITE BELTS, AS WELL AS COMPOSITE BELTS OBTAINED

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FR2625943A1 true FR2625943A1 (en) 1989-07-21
FR2625943B1 FR2625943B1 (en) 1990-05-18

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105112571B (en) * 2015-08-24 2017-08-01 浙江格莱美服装有限公司 A kind of leather seamless adhesion machine

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057419A (en) * 1934-06-12 1936-10-13 Albert B Crush Power transmission belt and method of making the same
CH293514A (en) * 1950-02-01 1953-09-30 Hagen Reinold Process for the production of firmly adhering coatings from thermoplastics on leather.
FR1133205A (en) * 1955-04-29 1957-03-25 Drive belt
FR1134604A (en) * 1955-10-21 1957-04-15 Improvements to transmission belts
FR1145294A (en) * 1955-01-17 1957-10-24 Process for bonding fiber-oriented plastics with non-oriented plastics, and belts obtained by this process
US2932340A (en) * 1957-05-07 1960-04-12 Hope Rubber Co Inc Endless laminated belt and method of making the same
GB1293009A (en) * 1969-10-21 1972-10-18 Semperit Ag Improvements in or relating to porous laminated material
DE2124779A1 (en) * 1971-05-19 1972-11-23 Schelzig, Manfred, 8900 Augsburg Two-layered shoe material - comprising a lining and a layer of thermoplastic
FR2293299A1 (en) * 1974-12-05 1976-07-02 Leuna Werke Veb MULTI-LAYER FLEXIBLE TAPE BASED ON A SHEET OF EXPANDED THERMOPLASTIC MATERIAL AND PROCESS FOR ITS MANUFACTURING
FR2429092A1 (en) * 1978-06-20 1980-01-18 Vial Armand Fusion lamination of expanded thermoplastic sheet to films or foils - for mfr. of bottle closure linings
US4451320A (en) * 1982-01-11 1984-05-29 Marvel Fred D Packet-type laminator
EP0142140A2 (en) * 1983-11-09 1985-05-22 Norddeutsche Schleifmittel-Industrie Christiansen & Co. (GmbH & Co.) Abrasive belt with a junction reinforced with a synthetic resin strip

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057419A (en) * 1934-06-12 1936-10-13 Albert B Crush Power transmission belt and method of making the same
CH293514A (en) * 1950-02-01 1953-09-30 Hagen Reinold Process for the production of firmly adhering coatings from thermoplastics on leather.
FR1145294A (en) * 1955-01-17 1957-10-24 Process for bonding fiber-oriented plastics with non-oriented plastics, and belts obtained by this process
FR1133205A (en) * 1955-04-29 1957-03-25 Drive belt
FR1134604A (en) * 1955-10-21 1957-04-15 Improvements to transmission belts
US2932340A (en) * 1957-05-07 1960-04-12 Hope Rubber Co Inc Endless laminated belt and method of making the same
GB1293009A (en) * 1969-10-21 1972-10-18 Semperit Ag Improvements in or relating to porous laminated material
DE2124779A1 (en) * 1971-05-19 1972-11-23 Schelzig, Manfred, 8900 Augsburg Two-layered shoe material - comprising a lining and a layer of thermoplastic
FR2293299A1 (en) * 1974-12-05 1976-07-02 Leuna Werke Veb MULTI-LAYER FLEXIBLE TAPE BASED ON A SHEET OF EXPANDED THERMOPLASTIC MATERIAL AND PROCESS FOR ITS MANUFACTURING
FR2429092A1 (en) * 1978-06-20 1980-01-18 Vial Armand Fusion lamination of expanded thermoplastic sheet to films or foils - for mfr. of bottle closure linings
US4451320A (en) * 1982-01-11 1984-05-29 Marvel Fred D Packet-type laminator
EP0142140A2 (en) * 1983-11-09 1985-05-22 Norddeutsche Schleifmittel-Industrie Christiansen & Co. (GmbH & Co.) Abrasive belt with a junction reinforced with a synthetic resin strip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 16, no. 10, mars 1974, page 3201, New York, US; L.C.HOFMEISTER et al.: "Forming continuous belts in situ" *

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