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IT201800005601A1 - PROCEDURE FOR MANUFACTURING OF AIR CHAMBERS AND AIR CHAMBER SO OBTAINABLE - Google Patents

PROCEDURE FOR MANUFACTURING OF AIR CHAMBERS AND AIR CHAMBER SO OBTAINABLE Download PDF

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Publication number
IT201800005601A1
IT201800005601A1 IT102018000005601A IT201800005601A IT201800005601A1 IT 201800005601 A1 IT201800005601 A1 IT 201800005601A1 IT 102018000005601 A IT102018000005601 A IT 102018000005601A IT 201800005601 A IT201800005601 A IT 201800005601A IT 201800005601 A1 IT201800005601 A1 IT 201800005601A1
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IT
Italy
Prior art keywords
tubular body
reinforcing element
air chamber
opening
internal cavity
Prior art date
Application number
IT102018000005601A
Other languages
Italian (it)
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
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Priority to IT102018000005601A priority Critical patent/IT201800005601A1/en
Priority to TW108117084A priority patent/TW202003286A/en
Priority to EP19735387.3A priority patent/EP3797030A1/en
Priority to PCT/IB2019/054172 priority patent/WO2019224704A1/en
Publication of IT201800005601A1 publication Critical patent/IT201800005601A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C5/00Inflatable pneumatic tyres or inner tubes
    • B60C5/10Inflatable pneumatic tyres or inner tubes formed as a single discontinuous ring with contiguous ends which may be connected together
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00Producing tubular articles
    • B29D23/24Endless tubes, e.g. inner tubes for pneumatic tyres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114Single butt joints
    • B29C66/1142Single butt to butt joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5221Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B29C66/52211Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other for making endless tubular articles, e.g. endless inner tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5227Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles
    • B29C66/52271Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles one tubular article being placed inside the other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/526Joining bars
    • B29C66/5261Joining bars for forming coaxial connections, i.e. the bars to be joined forming a zero angle relative to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63Internally supporting the article during joining
    • B29C66/636Internally supporting the article during joining using a support which remains in the joined object
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/046Condition, form or state of moulded material or of the material to be shaped cellular or porous with closed cells
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/24Endless tubes, e.g. inner tubes for pneumatic tyres
    • B29L2023/245Inner tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Air Bags (AREA)

Description

Descrizione di Brevetto per Invenzione Industriale avente per titolo: “PROCEDIMENTO DI FABBRICAZIONE DI CAMERE D’ARIA E CAMERA D’ARIA COSÌ OTTENIBILE”. Patent Description for Industrial Invention entitled: "PROCEDURE FOR MANUFACTURING AIR CHAMBERS AND AIR CHAMBERS SO OBTAINED".

DESCRIZIONE DESCRIPTION

La presente invenzione si riferisce ad un procedimento di fabbricazione di camere d’aria e camera d’aria così ottenibile. The present invention refers to a manufacturing process of inner tubes and inner tubes thus obtainable.

Una tipologia nota di pneumatici per bicicletta è lo pneumatico tubeless. Esso consiste in uno pneumatico privo di camera d’aria, con un copertone realizzato per fare tenuta. A known type of bicycle tire is the tubeless tire. It consists of a tire without an air chamber, with a tire made to seal.

All’interno del copertone può essere inserita una barra a sezione circolare, di materiale semi-rigido (spesso polietilene espanso a celle chiuse), che viene piegata su se stessa per farne combaciare le estremità, formando un anello. Inside the tire can be inserted a bar with a circular section, made of semi-rigid material (often expanded polyethylene with closed cells), which is folded on itself to make the ends match, forming a ring.

Successivamente, il copertone con l’anello viene montato sul cerchio della ruota e gonfiato. Subsequently, the tire with the ring is mounted on the wheel rim and inflated.

L’anello semirigido ha funzione di rinforzo, contribuendo ad attutire gli urti della ruota contro le asperità del terreno e sostenendo la ruota stessa in mancanza di pressione all’interno del tubeless in caso di foratura. The semi-rigid ring has a reinforcement function, helping to cushion the impacts of the wheel against the roughness of the ground and supporting the wheel itself in the absence of pressure inside the tubeless tire in the event of a puncture.

La tecnica tubeless nota presenta alcuni inconvenienti, tra i quali va annoverato il fatto che uno pneumatico tubeless rischia l’esplosione in caso di urto molto violento con un ostacolo. The known tubeless technique has some drawbacks, including the fact that a tubeless tire risks explosion in the event of a very violent impact with an obstacle.

Un altro inconveniente degli pneumatici tubeless noti è il costo, in quanto un’eventuale foratura costringe a cambiare un intero copertone progettato per fare tenuta e provvisto di un battistrada dalla trama complessa, elementi che contribuiscono ad aumentarne il prezzo. Another drawback of known tubeless tires is the cost, as a possible puncture forces you to change an entire tire designed to seal and equipped with a tread with a complex texture, elements that contribute to increasing the price.

Un’altra tipologia nota di pneumatico per bicicletta è lo pneumatico con camera d’aria. Another known type of bicycle tire is the tube tire.

La camera d’aria viene inserita all’interno di un copertone, il quale viene successivamente montato sul cerchione della ruota, infine la camera d’aria viene gonfiata. The inner tube is inserted inside a tire, which is subsequently mounted on the wheel rim, finally the inner tube is inflated.

Il copertone, in questa tipologia di pneumatico, è ancora dotato di una trama complessa, ma non viene gonfiato esso stesso, dunque non ha bisogno di fare tenuta e non necessita di essere sostituito in caso di foratura. The tire, in this type of tire, is still equipped with a complex texture, but it is not inflated itself, so it does not need to seal and does not need to be replaced in the event of a puncture.

Questa tecnica nota presenta alcuni inconvenienti, tra i quali va riportato il fatto che essa non offre alcuna protezione contro le forature. This known technique has some drawbacks, among which it should be noted that it does not offer any protection against punctures.

Un’eventuale foratura, infatti, determina l’immediato sgonfiaggio della camera d’aria, senza alcuna gradualità o sostegno. A possible puncture, in fact, determines the immediate deflation of the air chamber, without any gradualness or support.

Il compito principale della presente invenzione è quello di realizzare in modo semplice ed efficace una camera d’aria rinforzata, in grado di assommare le positive peculiarità della tecnologia tubeless e della camera d’aria tradizionale, ponendo rimedio agli inconvenienti di entrambi. The main task of the present invention is to create a reinforced bladder in a simple and effective way, capable of combining the positive characteristics of tubeless technology and the traditional bladder, remedying the drawbacks of both.

All’interno di tale compito, uno scopo del presente trovato è quello di escogitare un procedimento di fabbricazione che consenta di ottenere una camera d’aria in grado di sostenere la ruota in caso di foratura. Within this aim, an object of the present invention is to devise a manufacturing process that allows to obtain an air chamber capable of supporting the wheel in the event of a puncture.

Altro scopo del presente trovato è quello di escogitare una camera d’aria dotata di caratteristiche strutturali e funzionali tali da risolvere gli inconvenienti sopra esposti. Another purpose of the present invention is to devise an air chamber equipped with structural and functional characteristics such as to solve the aforementioned drawbacks.

Un altro scopo ancora della presente invenzione è quello di realizzare una camera d’aria in grado di assorbire meglio gli urti con le asperità del terreno. Yet another purpose of the present invention is to provide an air chamber capable of better absorbing impacts with the roughness of the ground.

Uno scopo ancora della presente invenzione è quello di proporre una camera d’aria che non rischi l’esplosione in caso di urto particolarmente violento contro un ostacolo. Another purpose of the present invention is to propose an air chamber that does not risk an explosion in the event of a particularly violent impact against an obstacle.

Un altro scopo ancora del presente trovato è quello di escogitare una camera d’aria che consenta di contenere i costi di sostituzione in caso di foratura. Yet another object of the present invention is to provide an air chamber that allows to contain replacement costs in the event of a puncture.

Altro scopo della presente invenzione è quello di escogitare un procedimento di fabbricazione di camere d’aria rinforzate, e relativa camera d’aria così ottenuta, che consentano di superare i menzionati inconvenienti della tecnica nota nell’ambito di una soluzione semplice, razionale, di facile ed efficace impiego e dal costo contenuto. Another object of the present invention is to devise a process for manufacturing reinforced air chambers, and relative air chamber thus obtained, which allow to overcome the aforementioned drawbacks of the prior art in the context of a simple, rational solution of easy and effective use and low cost.

Gli scopi sopra esposti sono raggiunti dal presente procedimento di fabbricazione di camere d’aria avente le caratteristiche di rivendicazione 1. Gli scopi sopra esposti sono inoltre raggiunti dalla presente camera d’aria avente le caratteristiche di rivendicazione 10. The aforementioned purposes are achieved by the present process of manufacturing air chambers having the characteristics of claim 1. The above purposes are also achieved by the present air chamber having the characteristics of claim 10.

Altre caratteristiche e vantaggi della presente invenzione risulteranno maggiormente evidenti dalla descrizione di una forma di esecuzione preferita, ma non esclusiva, di un procedimento di fabbricazione di camere d’aria e di una camera d’aria così ottenibile, illustrata a titolo indicativo, ma non limitativo, nelle unite tavole di disegni in cui: Other characteristics and advantages of the present invention will become more evident from the description of a preferred but not exclusive embodiment of a process for manufacturing air chambers and an air chamber thus obtainable, illustrated by way of example, but not limitative, in the joined tables of drawings in which:

la figura 1 rappresenta una camera d’aria secondo il trovato. Figure 1 represents an air chamber according to the invention.

le figure 2-6 sono rappresentazioni schematiche del procedimento di fabbricazione di camere d’aria secondo il trovato. Figures 2-6 are schematic representations of the manufacturing process of air chambers according to the invention.

Con particolare riferimento alla figura 1, si è indicato globalmente con 1 una camera d’aria rinforzata. With particular reference to Figure 1, 1 generally indicates a reinforced air chamber.

La camera d’aria 1 comprende un corpo tubolare 2 realizzato in materiale elastico, il quale definisce una cavità interna 3 atta ad essere riempita d’aria durante il gonfiaggio. The air chamber 1 comprises a tubular body 2 made of elastic material, which defines an internal cavity 3 suitable for being filled with air during inflation.

Vantaggiosamente, la camera d’aria 1 comprende almeno un elemento di rinforzo 4 alloggiato all’interno della cavità interna 3. Advantageously, the air chamber 1 includes at least one reinforcement element 4 housed inside the internal cavity 3.

Il gonfiaggio e lo sgonfiaggio sono permessi dalla presenza di una valvola di sfiato 5 connessa al corpo tubolare 2. Inflation and deflation are allowed by the presence of a vent valve 5 connected to the tubular body 2.

Vantaggiosamente, l’elemento di rinforzo 4 è realizzato in almeno un materiale semi-rigido, essendo atto ad assorbire gli urti con le asperità del terreno e a conferire un certo grado di rigidezza allo pneumatico, tale da fornirgli un sostegno in caso di foratura. Advantageously, the reinforcement element 4 is made of at least one semi-rigid material, being able to absorb shocks with the roughness of the ground and to give a certain degree of stiffness to the tire, such as to provide it with support in the event of a puncture.

Preferibilmente, il materiale semi-rigido in questione è neoprene espanso a celle chiuse, ma non si esclude la possibilità di utilizzare diversi materiali semi-rigidi, quali ad esempio il polietilene espanso, o combinazioni di una pluralità di materiali semi-rigidi. Preferably, the semi-rigid material in question is closed cell expanded neoprene, but the possibility of using different semi-rigid materials, such as for example expanded polyethylene, or combinations of a plurality of semi-rigid materials is not excluded.

Secondo la preferita forma di realizzazione mostrata nelle figure 1-6, l’elemento di rinforzo 4 è una barra a sezione circolare piena. According to the preferred embodiment shown in figures 1-6, the reinforcing element 4 is a bar with a solid circular section.

Inoltre, preferibilmente la camera d’aria 1 comprende un unico elemento di rinforzo 4. Furthermore, preferably the air chamber 1 comprises a single reinforcing element 4.

Non si escludono, tuttavia, possibili alternative realizzative in cui tale elemento di rinforzo 4 abbia una forma o una sezione diversa, ad esempio circolare cava o simile, o in cui siano presenti più di un elemento di rinforzo 4, ad esempio collegati in serie l’uno all’altro. However, possible alternatives are not excluded in which said reinforcing element 4 has a different shape or section, for example hollow circular or similar, or in which there are more than one reinforcing element 4, for example connected in series l 'one to the other.

Il procedimento di fabbricazione di una camera d’aria rinforzata secondo il trovato è illustrato nelle figure dalla 2 alla 6 ed è descritto di seguito secondo una preferita, ma non esclusiva, forma di esecuzione che prevede l’utilizzo di un solo elemento di rinforzo, pur non escludendo la possibilità di impiegarne un numero maggiore. The manufacturing process of a reinforced air chamber according to the invention is illustrated in Figures 2 to 6 and is described below according to a preferred, but not exclusive, embodiment which provides for the use of a single reinforcing element, while not excluding the possibility of using a greater number.

Un primo passo comprende la fornitura di una camera d’aria 1, la quale comprende un corpo tubolare 2 che definisce una camera interna 3. A first step includes the supply of an air chamber 1, which comprises a tubular body 2 which defines an internal chamber 3.

Un secondo passo prevede la fornitura di almeno un elemento di rinforzo 4, il quale ha una forma sostanzialmente allungata ed è provvisto di porzioni estremali 6. A second step provides for the provision of at least one reinforcing element 4, which has a substantially elongated shape and is provided with extremal portions 6.

Il passo successivo prevede l’esecuzione di almeno un’apertura 7 nel corpo tubolare 2 della camera d’aria 1. The next step involves making at least one opening 7 in the tubular body 2 of the air chamber 1.

Vantaggiosamente, secondo una preferita forma di attuazione, tale apertura 7 viene ottenuta mediante un taglio trasversale eseguito sul corpo tubolare 2 della camera d’aria 1, atto a separare una prima estremità 8 da una seconda estremità 9 del corpo tubolare 2. Advantageously, according to a preferred embodiment, this opening 7 is obtained by means of a transverse cut made on the tubular body 2 of the air chamber 1, designed to separate a first end 8 from a second end 9 of the tubular body 2.

Tale passo di taglio è illustrato schematicamente in figura 2. This cutting step is schematically illustrated in figure 2.

A titolo di esempio, tale apertura 7 è una soltanto nelle figure 2-6, ma non si esclude di poterne realizzare un numero maggiore. By way of example, such opening 7 is only one in Figures 2-6, but it is not excluded that a greater number can be made.

Non si esclude, inoltre, la possibilità che tale apertura venga ottenuta in maniera diversa da quanto descritto, ad esempio mediante un taglio parziale atto a realizzare una sorta di finestrella nel corpo tubolare. Furthermore, the possibility that this opening is obtained in a different way from what has been described is not excluded, for example by means of a partial cut suitable for making a sort of window in the tubular body.

Successivamente, come mostrato in figura 3, nel procedimento è previsto un passo che comprende l’inserimento dell’elemento di rinforzo 4 nella cavità interna 3 della camera d’aria 1, attraverso l’apertura 7 precedentemente eseguita. Subsequently, as shown in figure 3, a step is envisaged in the procedure which includes the insertion of the reinforcing element 4 into the internal cavity 3 of the air chamber 1, through the opening 7 previously performed.

Successivamente, il procedimento comprende un passo di piegatura dell’elemento di rinforzo 4 al fine di ottenere una forma sostanzialmente ad anello, tale da adattarsi alla forma circolare della camera d’aria 1. Subsequently, the process comprises a bending step of the reinforcing element 4 in order to obtain a substantially ring shape, such as to adapt to the circular shape of the air chamber 1.

Un ulteriore passo del procedimento 1 comprende l’unione delle porzioni estremali 6 dell’elemento di rinforzo 4, che, nella preferita forma di realizzazione mostrata nelle figure 1-6 e in particolare nella figura 4, vengono a trovarsi in posizione adiacente l’una all’altra a seguito della piegatura. A further step of the method 1 comprises the union of the extremal portions 6 of the reinforcing element 4, which, in the preferred embodiment shown in Figures 1-6 and in particular in Figure 4, are located in a position adjacent to each other. to the other as a result of folding.

Nel caso alternativo in cui venissero utilizzati più elementi di rinforzo 4, le porzioni estremali 6 adiacenti da unire non apparterrebbero allo stesso elemento 4 ma ad elementi 4 diversi, senza tuttavia alterare sostanzialmente il procedimento fin qui descritto. In the alternative case in which several reinforcing elements 4 were used, the adjacent extremal portions 6 to be joined would not belong to the same element 4 but to different elements 4, without however substantially altering the process described up to now.

Preferibilmente, tale passo di unione delle porzioni estremali 6 adiacenti comprende almeno un passo di incollaggio, realizzato per mezzo di un primo materiale colloso 10, come indicato schematicamente in figura 4. Non si esclude, altresì, la possibilità di effettuare questo passo di unione in altra maniera, ad esempio tramite saldatura delle porzioni estremali 6. Preferably, this joining step of the adjacent end portions 6 comprises at least one gluing step, made by means of a first gluey material 10, as schematically indicated in figure 4. The possibility of carrying out this joining step in other way, for example by welding the extremal portions 6.

Infine, il procedimento comprende un ulteriore passo consistente nel chiudere l’apertura 7 eseguita sul corpo tubolare 2 della camera d’aria 1. Tale chiusura viene eseguita preferibilmente mediante almeno un’operazione di incollaggio. Finally, the procedure includes a further step consisting in closing the opening 7 performed on the tubular body 2 of the air chamber 1. This closure is preferably performed by at least one gluing operation.

Vantaggiosamente, questo passo di chiusura comprende a sua volta almeno i seguenti passi, illustrati nelle figure 5 e 6: Advantageously, this closing step in turn comprises at least the following steps, illustrated in Figures 5 and 6:

- rivoltare a rovescio la prima estremità 8 tagliata del corpo tubolare 2, - applicare un secondo materiale colloso 11, non necessariamente uguale al primo materiale colloso 10, sulla parte interna della prima estremità 8 rivoltata, - turn inside out the first cut end 8 of the tubular body 2, - apply a second sticky material 11, not necessarily the same as the first sticky material 10, on the inside of the first turned up end 8,

- applicare il secondo materiale colloso 11 sulla parte esterna della seconda estremità 9 non rivoltata del corpo tubolare, - applying the second sticky material 11 on the external part of the second non-turned end 9 of the tubular body,

- rivoltare la prima estremità 8 al fine di sovrapporla e incollarla alla seconda estremità 9. - turn the first end 8 over in order to overlap it and glue it to the second end 9.

Non viene esclusa tuttavia la possibilità di eseguire il passo di chiusura dell’apertura 7 in modo diverso, per esempio tramite l’applicazione per incollaggio di un elemento elastico non facente parte della camera d’aria 1. Si è in pratica constatato come l’invenzione descritta raggiunga gli scopi proposti. However, the possibility of carrying out the closing step of the opening 7 in a different way is not excluded, for example by applying by gluing an elastic element which is not part of the inner tube 1. It has been found in practice that the the invention described achieves the proposed objects.

In particolare, si sottolinea il fatto che il procedimento di fabbricazione di camere d’aria descritto consente di realizzare in modo semplice ed efficace una camera d’aria rinforzata, in grado di assommare le positive peculiarità della tecnologia tubeless e della camera d’aria tradizionale, ponendo rimedio agli inconvenienti di entrambi. In particular, it is emphasized that the procedure for manufacturing air chambers described makes it possible to create a reinforced air chamber in a simple and effective way, capable of combining the positive characteristics of tubeless technology and the traditional air chamber. , remedying the drawbacks of both.

In particolare, la camera d’aria così ottenuta riesce a fornire un sostegno allo pneumatico in caso di foratura, offrendo una certa protezione grazie alla presenza dell’elemento di rinforzo. In particular, the air chamber thus obtained is able to provide support to the tire in the event of a puncture, offering some protection thanks to the presence of the reinforcing element.

Inoltre, la camera d’aria ottenuta è in grado di assorbire meglio gli urti con le asperità del terreno. In addition, the air chamber obtained is able to better absorb shocks with the roughness of the ground.

Lo pneumatico, inoltre, non rischia l’esplosione in caso di urto violento con un ostacolo. Furthermore, the tire does not risk an explosion in the event of a violent impact with an obstacle.

Il fatto che lo pneumatico risultante sia dotato di camera d’aria consente anche di ridurre i costi derivanti da una foratura, com’è evidente dal fatto che la sostituzione di una camera d’aria è molto meno onerosa rispetto alla sostituzione di un copertone progettato per fare tenuta e dotato di una trama complessa. The fact that the resulting tire is equipped with an inner tube also allows to reduce the costs deriving from a puncture, as is evident from the fact that the replacement of an inner tube is much less expensive than the replacement of a designed tire. to make tight and equipped with a complex texture.

Si osserva inoltre che il procedimento descritto rende semplice l’accoppiamento di un elemento di rinforzo con una camera d’aria, al contempo evitando che questo elemento di rinforzo sia d’ostacolo alla camera d’aria stessa. It is also noted that the described procedure makes it easy to couple a reinforcing element with an air chamber, at the same time avoiding that this reinforcing element is an obstacle to the air chamber itself.

La posizione dell’elemento di rinforzo, interna alla cavità definita dal corpo tubolare della camera d’aria, fa sì che esso non riduca lo spazio a disposizione della camera d’aria, la quale non ha quindi bisogno di adattarsi al suo ingombro. The position of the reinforcing element, inside the cavity defined by the tubular body of the air chamber, ensures that it does not reduce the space available to the air chamber, which therefore does not need to adapt to its overall dimensions.

Claims (15)

RIVENDICAZIONI 1) Procedimento di fabbricazione di camere d’aria (1), caratterizzato dal fatto che comprende almeno i seguenti passi: - fornitura di almeno una camera d’aria (1) provvista di almeno un corpo tubolare (2) definente almeno una cavità interna (3), - fornitura di almeno un elemento di rinforzo (4) di forma sostanzialmente allungata provvisto di porzioni estremali (6), - esecuzione di almeno un’apertura (1) in detto corpo tubolare (2), - inserimento di detto almeno un elemento di rinforzo (4) in detta cavità interna (3) attraverso detta almeno un’apertura (7), - piegatura di detto almeno un elemento di rinforzo (4), ad ottenere una forma sostanzialmente ad anello, - unione di dette porzioni estremali (6) adiacenti di detto almeno un elemento di rinforzo (4), - chiusura di detta almeno un’apertura (7) in detto corpo tubolare (2). CLAIMS 1) Process for manufacturing air chambers (1), characterized by the fact that it includes at least the following steps: - supply of at least one air chamber (1) equipped with at least one tubular body (2) defining at least one internal cavity (3), - supply of at least one reinforcing element (4) of substantially elongated shape provided with extremal portions (6), - making at least one opening (1) in said tubular body (2), - insertion of said at least one reinforcement element (4) in said internal cavity (3) through said at least one opening (7), - bending of said at least one reinforcing element (4), to obtain a substantially ring shape, - joining said extremal portions (6) adjacent to said at least one reinforcing element (4), - closing of said at least one opening (7) in said tubular body (2). 2) Procedimento secondo la rivendicazione 1, caratterizzato dal fatto che detto passo di esecuzione di almeno un’apertura (7) comprende almeno un’operazione di taglio trasversale di detto corpo tubolare (2), atto a separare almeno una prima estremità (8) di detto corpo tubolare (2) da almeno una seconda estremità (9) di detto corpo tubolare (2). 2) Process according to claim 1, characterized in that said step for making at least one opening (7) comprises at least an operation of transversal cutting of said tubular body (2), able to separate at least one first end (8) of said tubular body (2) from at least a second end (9) of said tubular body (2). 3) Procedimento secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto che detto passo di unione di dette porzioni estremali (6) comprende almeno un passo di incollaggio di dette porzioni estremali (6) adiacenti di detto almeno un elemento di rinforzo (4). 3) Process according to one or more of the preceding claims, characterized in that said step for joining said extremal portions (6) comprises at least one step for gluing said extremal portions (6) adjacent to said at least one reinforcing element (4) . 4) Procedimento secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto che detto passo di chiusura di almeno un’apertura (7) di detto corpo tubolare (2) comprende almeno un passo di incollaggio. 4) Process according to one or more of the preceding claims, characterized in that said closing step of at least one opening (7) of said tubular body (2) comprises at least one gluing step. 5) Procedimento secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto che detto passo di chiusura comprende almeno i seguenti passi: - rivoltare a rovescio detta prima estremità (8) tagliata di detto corpo tubolare (2), - applicare un primo materiale colloso (10) sulla parte interna di detta prima estremità (8) rivoltata, - applicare detto primo materiale colloso (10) sulla parte esterna di detta seconda estremità (9), - rivoltare detta prima estremità (8) a sovrapporsi e incollarsi a detta seconda estremità (9). 5) Process according to one or more of the preceding claims, characterized in that said closing step comprises at least the following steps: - turning backwards said first cut end (8) of said tubular body (2), - applying a first gluey material (10) on the internal part of said first turned end (8), - applying said first gluey material (10) on the external part of said second end (9), - turning over said first end (8) to overlap and glue to said second end (9). 6) Procedimento secondo una o più delle rivendicazioni precedenti, caratterizzato dal fatto che detto almeno un elemento di rinforzo (4) comprende almeno un materiale semi-rigido. 6) Process according to one or more of the preceding claims, characterized in that said at least one reinforcing element (4) comprises at least one semi-rigid material. 7) Procedimento secondo la rivendicazione 6, caratterizzato dal fatto che detto almeno un materiale semi-rigido comprende neoprene espanso a celle chiuse. 7) Process according to claim 6, characterized in that said at least one semi-rigid material comprises closed cell expanded neoprene. 8) Procedimento secondo una o più rivendicazioni precedenti, caratterizzato dal fatto che detto almeno un elemento di rinforzo (4) comprende almeno una barra a sezione circolare piena. 8) Process according to one or more preceding claims, characterized in that said at least one reinforcing element (4) comprises at least one bar with a solid circular section. 9) Procedimento secondo la rivendicazione 1, caratterizzato dal fatto che comprende i seguenti passi: - fornitura di almeno una camera d’aria (1) provvista di almeno un corpo tubolare (2) definente almeno una cavità interna (3), - fornitura di un solo elemento di rinforzo (4) di forma sostanzialmente allungata provvisto di porzioni estremali (6), - esecuzione di almeno un’apertura (7) in detto corpo tubolare (2), - inserimento di detto elemento di rinforzo (4) in detta cavità interna (3) attraverso detta almeno un’apertura (7), - piegatura di detto elemento di rinforzo (4), ad ottenere una forma sostanzialmente ad anello, - unione di dette porzioni estremali (6) adiacenti di detto elemento di rinforzo (4), - chiusura di detta almeno un’apertura (7) in detto corpo tubolare (2). 9) Process according to claim 1, characterized in that it comprises the following steps: - supply of at least one air chamber (1) equipped with at least one tubular body (2) defining at least one internal cavity (3), - supply of a single reinforcing element (4) of substantially elongated shape provided with extremal portions (6), - execution of at least one opening (7) in said tubular body (2), - insertion of said reinforcement element (4) in said internal cavity (3) through said at least one opening (7), - bending of said reinforcing element (4), to obtain a substantially ring shape, - joining said extremal portions (6) adjacent to said reinforcing element (4), - closing of said at least one opening (7) in said tubular body (2). 10) Camera d’aria (1), comprendente almeno i seguenti elementi: - almeno un corpo tubolare (2) in materiale elastico, definente almeno una cavità interna (3); e - almeno una valvola di sfiato (5) associata a detto corpo tubolare e atta al gonfiaggio e sgonfiaggio di detto corpo tubolare (2); caratterizzata dal fatto che comprende almeno un elemento di rinforzo (4) disposto in detta cavità interna (3) di detto corpo tubolare (2). 10) Air chamber (1), comprising at least the following elements: - at least one tubular body (2) made of elastic material, defining at least one internal cavity (3); And - at least one vent valve (5) associated with said tubular body and adapted to inflate and deflate said tubular body (2); characterized in that it comprises at least one reinforcing element (4) disposed in said internal cavity (3) of said tubular body (2). 11) Camera d’aria (1) secondo la rivendicazione 10, caratterizzata dal fatto che detto almeno un elemento di rinforzo (4) è dotato di una forma anulare e si estende all’interno di detta cavità interna (3) sostanzialmente per tutta la lunghezza di detto corpo tubolare (2). 11) Air chamber (1) according to claim 10, characterized in that said at least one reinforcing element (4) is provided with an annular shape and extends inside said internal cavity (3) substantially for the whole length of said tubular body (2). 12) Camera d’aria (1) secondo la rivendicazione 10, caratterizzata dal fatto che detto almeno un elemento di rinforzo (4) è realizzato in almeno un materiale semi-rigido. 12) Air chamber (1) according to claim 10, characterized by the fact that said at least one reinforcing element (4) is made of at least one semi-rigid material. 13) Camera d’aria (1) secondo una o più rivendicazioni dalla 10 alla 12, caratterizzata dal fatto che detto materiale semi-rigido comprende neoprene espanso a celle chiuse. 13) Air chamber (1) according to one or more claims from 10 to 12, characterized in that said semi-rigid material comprises closed cell expanded neoprene. 14) Camera d’aria (1) secondo una o più rivendicazioni dalla 10 alla 13, caratterizzata dal fatto che detto almeno un elemento di rinforzo (4) comprende almeno una barra a sezione circolare piena. 14) Air chamber (1) according to one or more claims from 10 to 13, characterized by the fact that said at least one reinforcing element (4) includes at least a solid circular section bar. 15) Camera d’aria (1) secondo una o più rivendicazioni dalla 10 alla 14, caratterizzata dal fatto che detta cavità interna (3) racchiude un solo elemento di rinforzo (4). 15) Air chamber (1) according to one or more claims from 10 to 14, characterized by the fact that said internal cavity (3) encloses a single reinforcing element (4).
IT102018000005601A 2018-05-22 2018-05-22 PROCEDURE FOR MANUFACTURING OF AIR CHAMBERS AND AIR CHAMBER SO OBTAINABLE IT201800005601A1 (en)

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TW108117084A TW202003286A (en) 2018-05-22 2019-05-17 Manufacturing process of inner tubes and inner tube thus obtainable
EP19735387.3A EP3797030A1 (en) 2018-05-22 2019-05-21 Manufacturing process of inner tubes and inner tube thus obtainable
PCT/IB2019/054172 WO2019224704A1 (en) 2018-05-22 2019-05-21 Manufacturing process of inner tubes and inner tube thus obtainable

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