ITAV20010004A1 - "INDUSTRIAL PRODUCTION METHOD OF SELF-STRINGING JOINTS AND TERMINALS WITH SEVERAL TECHNICAL WALLS, WITHOUT THE ADOPTION OF CO-MOLDING AND CO - Google Patents
"INDUSTRIAL PRODUCTION METHOD OF SELF-STRINGING JOINTS AND TERMINALS WITH SEVERAL TECHNICAL WALLS, WITHOUT THE ADOPTION OF CO-MOLDING AND CO Download PDFInfo
- Publication number
- ITAV20010004A1 ITAV20010004A1 IT2001AV000004A ITAV20010004A ITAV20010004A1 IT AV20010004 A1 ITAV20010004 A1 IT AV20010004A1 IT 2001AV000004 A IT2001AV000004 A IT 2001AV000004A IT AV20010004 A ITAV20010004 A IT AV20010004A IT AV20010004 A1 ITAV20010004 A1 IT AV20010004A1
- Authority
- IT
- Italy
- Prior art keywords
- production method
- industrial production
- fact
- layers
- individual components
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 25
- 238000009776 industrial production Methods 0.000 title claims description 16
- 238000013037 co-molding Methods 0.000 title claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims 1
- 230000006870 function Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000295 complement effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 208000000044 Amnesia Diseases 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000001793 charged compounds Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/06—Cable terminating boxes, frames or other structures
- H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
- H02G15/068—Cable terminating boxes, frames or other structures with devices for relieving electrical stress connected to the cable shield only
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Description
TITOLO INVENZIONE INDUSTRIALE: INDUSTRIAL INVENTION TITLE:
“METODO DI PRODUZIONE INDUSTRIALE DI GIUNTI E TERMINALI AUTOSTRINGENTI A PIU’ PARETI TECNICHE, SENZA L’ADOZIONE DEL COSTAMPAGGIO e della COESTRUSIONE e con ELEVATA FORZA E MEMORIA ELASTICA”. "METHOD OF INDUSTRIAL PRODUCTION OF SELF-TIGHTENING JOINTS AND TERMINALS WITH MULTIPLE TECHNICAL WALLS, WITHOUT THE ADOPTION OF MOLDING and CO-EXTRUSION and with HIGH STRENGTH AND ELASTIC MEMORY".
DESCRIZIONE INVENZIONE INDUSTRIALE : INDUSTRIAL INVENTION DESCRIPTION:
Scopo del presente trovato è la produzione di tubi per giunti e terminali elettrici in materiale autostringente, composto da pareti a più strati, aventi ciascuna caratteristiche elettriche e meccaniche diverse, non più con il metodo del costampaggio e della coestrusione, ma bensì estrudendo o stampando o altrimenti producendo singolarmente le varie sezioni tubolari e poi calzandole una sull’altra secondo le necessità. The purpose of the present invention is the production of pipes for joints and electrical terminals in self-tightening material, composed of multi-layer walls, each having different electrical and mechanical characteristics, no longer with the method of co-molding and co-extrusion, but rather by extruding or printing or otherwise by producing the various tubular sections individually and then fitting them one over the other as needed.
Col metodo descritto si possono realizzare i singoli componenti le pareti con le caratteristiche migliori per l’impiego cui sono destinate, senza dover realizzare un compromesso tra le caratteristiche desiderate ed il metodo produttivo. With the method described, the individual components of the walls with the best characteristics for the intended use can be made, without having to make a compromise between the desired characteristics and the production method.
Si riduce anche lo stress meccanico a cui sono sottoposti i tubi autostringenti nella fase di assemblaggio sui supporti tubolari rigidi e si riduce drasticamente il numero di diametri necessari a magazzino per coprire tutta la gamma delle applicazioni. The mechanical stress to which the self-tightening tubes are subjected during the assembly phase on the rigid tubular supports is also reduced and the number of diameters required in stock to cover the entire range of applications is drastically reduced.
Questo metodo trova applicazione principale nel settore degli accessori per impianti di produzione e distribuzione dell’energia elettrica. This method is mainly applied in the sector of accessories for electricity production and distribution systems.
RIASSUNTO: SUMMARY:
Un terminale o giunto o altro, per definirsi “ AUTOSTRINGENTE “ deve essere realizzato in materiali elastici tipo gomma naturale o gomma sintetica o altro materiale con funzioni analoghe, poiché esso deve prima essere allargato ad un diametro leggermente superiore a quello sul quale va installato e poi, grazie alla memoria elastica intrinseca, stringersi energicamente fino ad assicurare la desiderata tenuta, senza impiego di energia esterna. A terminal or joint or other, to be defined as "SELF-TIGHTENING" must be made of elastic materials such as natural rubber or synthetic rubber or other material with similar functions, since it must first be enlarged to a diameter slightly greater than that on which it is to be installed and then thanks to the intrinsic elastic memory, tighten vigorously to ensure the desired seal, without using external energy.
La fase di allargamento viene fatta normalmente in fabbrica e rappresenta una delle fasi del ciclo produttivo. The enlargement phase is normally done in the factory and represents one of the phases of the production cycle.
In pratica si procede ad espandere il manufatto e ad alloggiarlo su un supporto rigido, a forma normalmente cilindrica, con un diametro interno superiore a quello sul quale deve poi essere posizionato il manufatto stesso. Il preassemblato espanso rimane normalmente in magazzino fino alla vendita e quindi all’applicazione. In practice, the product is expanded and housed on a rigid support, normally cylindrical in shape, with an internal diameter greater than that on which the product itself must then be positioned. The expanded pre-assembled product normally remains in the warehouse until it is sold and then applied.
E’ di fondamentale importanza che durante la vita di magazzino il manufatto non perda eccessiva memoria elastica e forza elastica, cioè che conservi la proprietà di ritornare al diametro o alla forma che aveva prima dell’espansione e soprattutto che conservi la necessaria forza elastica. It is of fundamental importance that during the warehouse life the product does not lose excessive elastic memory and elastic strength, that is, that it retains the property of returning to the diameter or shape it had before expansion and above all that it retains the necessary elastic strength.
Tutti i tipi di giunti e terminali autostringenti attualmente prodotti e commercializzati sono realizzati stampando o estrudendo o coestrudendo o costampando contemporaneamente le varie mescole che servono a realizzare le varie funzioni elettriche e meccaniche o entrambi le funzioni (vedi fig. 1), con processi molto delicati e costosi. All types of self-tightening joints and terminals currently produced and marketed are made by molding or extruding or coextruding or co-molding the various compounds that are used to achieve the various electrical and mechanical functions or both functions (see fig. 1), with very delicate processes. and expensive.
Osservando la fig. 1 si vede che l’insieme è composto da uno o più spessori di materiale, ciascuno dei quali svolge una funzione particolare. In genere lo strato più interno deve assicurare il controllo del campo elettrico e quindi è realizzato con mescole caricate opportunamente. Lo strato più esterno deve assicurare la tenuta meccanica del giunto o del terminale e il giusto grado di isolamento elettrico e pertanto è realizzato con mescole diverse di quello più interno. Observing fig. 1 it can be seen that the whole is composed of one or more thicknesses of material, each of which performs a particular function. Generally, the innermost layer must ensure control of the electric field and is therefore made with suitably charged compounds. The outermost layer must ensure the mechanical seal of the joint or terminal and the right degree of electrical insulation and therefore is made with different compounds than the innermost one.
Gli eventuali strati intermedi possono svolgere di volta in volta varie funzioni, sia elettriche che meccaniche, in ciò contribuendo ad esaltare le caratteristiche finali del manufatto. Any intermediate layers can perform various functions from time to time, both electrical and mechanical, thereby helping to enhance the final characteristics of the product.
La diversità delle mescole impiegate per realizzare ciascuno strato, oltre a conferire quelle qualità elettriche specifiche alla funzione, determinano anche alcune qualità meccaniche che non sempre sono desiderabili e che limitano il campo d’impiego rendono difficoltoso il preassemblaggio in fabbrica e che riducono la vita di magazzino. The diversity of the compounds used to make each layer, in addition to conferring those electrical qualities specific to the function, also determine some mechanical qualities which are not always desirable and which limit the field of use make pre-assembly in the factory difficult and which reduce the life of the warehouse.
Studi eseguiti da diversi laboratori hanno dimostrato che i manufatti in gomma, di varia natura e composizione, preespansi e tenuti in magazzino, perdono circa il 15% della loro memoria elastica dopo appena due anni. Studies carried out by various laboratories have shown that rubber products, of various nature and composition, pre-expanded and kept in stock, lose about 15% of their elastic memory after just two years.
Le gomme caricate, quelle che costituiscono lo strato più interno del manufatto, hanno scarsa memoria elastica, perdendone addirittura fino al 50% sempre nei due anni. The loaded tires, those that make up the innermost layer of the product, have a poor elastic memory, even losing up to 50% in the two years.
Nel processo produttivo di costampaggio o coestrusione, o per entrambe le tecnologie, le mescole da utilizzare devono essere un compromesso tra quelle che sarebbero migliori con quelle compatibili col processo stesso. In the co-molding or co-extrusion production process, or for both technologies, the compounds to be used must be a compromise between those that would be better with those compatible with the process itself.
Inoltre un’altra grossa limitazione del sistema produttivo al costampaggio o coestrusione è che le dimensioni originarie stesse dei singoli strati non possono che essere l’una complementare all’altra, per cui non è possibile conferire maggiore forza elastica allo strato esterno, quello non caricato, per compensare la perdita di memoria dello strato più interno, quello caricato. Furthermore, another major limitation of the production system to co-molding or coextrusion is that the original dimensions of the individual layers themselves can only be complementary to each other, so it is not possible to give greater elastic strength to the outer layer, the non-filled one. , to compensate for the memory loss of the innermost layer, the one loaded.
TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION
Per meglio descrivere il trovato basta immaginare di scomporre il manufatto della fig. 1 nei suoi singoli strati, ottenendo così una serie di singoli tubi in materiale elastico variamente composto come riportato in fig. 2. To better describe the invention, it is sufficient to imagine that the article of fig. 1 in its individual layers, thus obtaining a series of individual tubes in variously composed elastic material as shown in fig. 2.
Nella fig. 2 si riporta una applicazione a puro titolo esemplificativo per meglio descrivere l’invenzione, esso pertanto non costituisce limitazione per gli sviluppi che possono derivare dalle varie applicazioni che di volta in volta si andranno a realizzare; sviluppi, modifiche e aggiunte che si intendono pertanto fin da ora compresi nelle rivendicazioni di cui al presente trovato. In fig. 2 shows an application purely by way of example to better describe the invention, it therefore does not constitute a limitation for the developments that may arise from the various applications that will be implemented from time to time; developments, modifications and additions which are therefore understood from now on included in the claims of the present invention.
Nel processo di costampaggio o coestrusione o entrambi le tecnologie i singoli strati disaccoppiati si presenterebbero con le lunghezze caratteristiche LI , LIn , L2 , LS e con i diametri complementeri, cioè il diametro esterno del tubo più interno uguale al diametro interno del primo tubo intermedio e così via fino ad avere il diametro esterno deH’ultimo tubo intermedio uguale al diametro interno del tubo più esterno; cioè In the co-molding or coextrusion process or both technologies, the single decoupled layers would have the characteristic lengths LI, LIn, L2, LS and with complementary diameters, i.e. the external diameter of the innermost tube equal to the internal diameter of the first intermediate tube and so on until the external diameter of the last intermediate tube is equal to the internal diameter of the outermost tube; that is
Del = Diln , DeIn = Di2. Del = Diln, DeIn = Di2.
Il supporto tubolare rigido ha poi una sua lunghezza LS ed un suo diametro DS. The rigid tubular support then has its own length LS and its diameter DS.
Nel processo descritto nel presente trovato ciascuno strato tubolare componente il manufatto è prodotto singolarmente con la tecnica più opportuna a conferirgli quelle caratteristiche meccaniche e elettriche o superficiali o altro che si desiderano. In the process described in the present invention, each tubular layer making up the article is produced individually with the most suitable technique to give it those mechanical and electrical or surface or other characteristics that are desired.
Le lunghezze di ciascun componente saranno quelle più o meno corrispondenti alla funzione da svolgere, mentre i diametri e gli spessori delle pareti saranno studiati con particolare cura per prevenire i fenomeni prima descritti di perdita di memoria elastica, per semplificare la fase di preassemblaggio e per ridurre rassortimento delle misure da tenere a magazzino. The lengths of each component will be those more or less corresponding to the function to be performed, while the diameters and thicknesses of the walls will be studied with particular care to prevent the phenomena described above of loss of elastic memory, to simplify the pre-assembly phase and to reduce reassortment of the measures to be kept in stock.
Se ad esempio il tubo più interno deve essere in una particolare mescola caricata che riduce drasticamente la memoria elastica dello stesso, il diametro originario sarà molto prossimo al diametro del supporto su quale deve essere alloggiato, in modo da ridurre i rischi di strappo durante il preassemblaggio. Questa scelta ovviamente fa si che questo strato da solo non possa adattarsi ai vari diametri delle applicazioni cui è destinato. For example, if the innermost tube must be in a particular loaded compound that drastically reduces its elastic memory, the original diameter will be very close to the diameter of the support on which it must be housed, in order to reduce the risk of tearing during pre-assembly. . This choice obviously means that this layer alone cannot adapt to the various diameters of the applications for which it is intended.
I vari strati intermedi saranno realizzati con il medesimo principio informatore, conferendo a ciascuno di volta in volta la caratteristica che più si ritiene importante. The various intermediate layers will be made with the same guiding principle, giving each time the characteristic that is considered most important.
Lo strato più esterno sarà invece realizzato avendo come obiettivo quello di assicurare la opportuna memoria e forza elastica al tutto, oltre che contribuire con altre qualità; capace quindi di stringere i vari strati interni, con la dovuta forza, sull’applicazione finale cui il tutto è destinato. The outermost layer will instead be made with the aim of ensuring the appropriate memory and elastic strength to the whole, as well as contributing with other qualities; therefore capable of tightening the various internal layers, with due force, on the final application to which the whole is intended.
Sempre a puro titolo esemplificativo e non limitativo, se il supporto rigido ha diametro esterno DeS, il primo tubo può avere diametro originario interno Dii prossimo a DeS; i tubi intermedi possono avere diametri originari conformi alle caratteristiche desiderate; l’ultimo tubo può avere diametro originario interno Di2 < DeS o Di2«DeS, cioè addirittura minore del diametro del supporto rigido. Again purely by way of non-limiting example, if the rigid support has an external diameter DeS, the first tube can have an original internal diameter Dii close to DeS; the intermediate pipes can have original diameters conforming to the desired characteristics; the last tube can have an original internal diameter Di2 <DeS or Di2 "DeS, that is, even smaller than the diameter of the rigid support.
In questa esemplificazione la forza e la memoria elastica possono essere demandati solo al tubo più esterno, che può essere costruito in mescole con grandi caratteristiche elastiche e di memoria. In this example, the strength and elastic memory can only be delegated to the outermost tube, which can be built in compounds with great elastic and memory characteristics.
Per ottenere il manufatto finito e preassemblato si procederà a calzare consecutivamente l’uno all’altro i vari strati, partendo dal più interno, come si vede sempre nella fig. 2. To obtain the finished and preassembled product, the various layers will be fitted consecutively to each other, starting from the innermost, as can always be seen in fig. 2.
Claims (14)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001AV000004A ITAV20010004A1 (en) | 2001-03-28 | 2001-03-28 | "INDUSTRIAL PRODUCTION METHOD OF SELF-STRINGING JOINTS AND TERMINALS WITH SEVERAL TECHNICAL WALLS, WITHOUT THE ADOPTION OF CO-MOLDING AND CO |
PCT/IT2002/000184 WO2002078145A1 (en) | 2001-03-28 | 2002-03-22 | Industrial production method for cold-shrink joints and terminations with multiple elastic walls |
EP02722673A EP1285482A1 (en) | 2001-03-28 | 2002-03-22 | Industrial production method for cold-shrink joints and terminations with multiple elastic walls |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2001AV000004A ITAV20010004A1 (en) | 2001-03-28 | 2001-03-28 | "INDUSTRIAL PRODUCTION METHOD OF SELF-STRINGING JOINTS AND TERMINALS WITH SEVERAL TECHNICAL WALLS, WITHOUT THE ADOPTION OF CO-MOLDING AND CO |
Publications (2)
Publication Number | Publication Date |
---|---|
ITAV20010004A0 ITAV20010004A0 (en) | 2001-03-28 |
ITAV20010004A1 true ITAV20010004A1 (en) | 2002-09-28 |
Family
ID=11437697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT2001AV000004A ITAV20010004A1 (en) | 2001-03-28 | 2001-03-28 | "INDUSTRIAL PRODUCTION METHOD OF SELF-STRINGING JOINTS AND TERMINALS WITH SEVERAL TECHNICAL WALLS, WITHOUT THE ADOPTION OF CO-MOLDING AND CO |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1285482A1 (en) |
IT (1) | ITAV20010004A1 (en) |
WO (1) | WO2002078145A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3131809B1 (en) * | 2022-01-12 | 2024-01-19 | Nexans | METHOD FOR MANUFACTURING AN ELECTRIC CABLE JUNCTION, ASSOCIATED JUNCTION AND CABLE |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3816640A (en) * | 1973-07-12 | 1974-06-11 | Minnesota Mining & Mfg | Multitube cable splice assembly and method of making same |
US6340794B1 (en) * | 1995-09-06 | 2002-01-22 | Minnesota Mining And Manufacturing Company | Stress control for termination of a high voltage cable |
ES2151990T3 (en) * | 1995-12-23 | 2001-01-16 | Minnesota Mining & Mfg | UNIVERSAL CABLE ADAPTER, CABLE GASKET USING THE ADAPTER AND METHOD TO MANUFACTURE IT. |
US5844170A (en) * | 1996-03-01 | 1998-12-01 | Minnesota Mining And Manufacturing Company | Closure with flowable material and reinforcing core |
-
2001
- 2001-03-28 IT IT2001AV000004A patent/ITAV20010004A1/en unknown
-
2002
- 2002-03-22 EP EP02722673A patent/EP1285482A1/en not_active Withdrawn
- 2002-03-22 WO PCT/IT2002/000184 patent/WO2002078145A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP1285482A1 (en) | 2003-02-26 |
WO2002078145A1 (en) | 2002-10-03 |
ITAV20010004A0 (en) | 2001-03-28 |
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