IT202000018583A1 - ROTARY HEAD FOR HEAT-SEALING - Google Patents

ROTARY HEAD FOR HEAT-SEALING Download PDF

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Publication number
IT202000018583A1
IT202000018583A1 IT102020000018583A IT202000018583A IT202000018583A1 IT 202000018583 A1 IT202000018583 A1 IT 202000018583A1 IT 102020000018583 A IT102020000018583 A IT 102020000018583A IT 202000018583 A IT202000018583 A IT 202000018583A IT 202000018583 A1 IT202000018583 A1 IT 202000018583A1
Authority
IT
Italy
Prior art keywords
heat
roller
heating resistor
rotary head
support
Prior art date
Application number
IT102020000018583A
Other languages
Italian (it)
Inventor
Mattia Sena
Original Assignee
Mattia Sena
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mattia Sena filed Critical Mattia Sena
Priority to IT102020000018583A priority Critical patent/IT202000018583A1/en
Publication of IT202000018583A1 publication Critical patent/IT202000018583A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/228—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for electrically connecting the ends of said heated wire, resistive ribbon, resistive band or resistive strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7433—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/853—Machines for changing web rolls or filaments, e.g. for joining a replacement web to an expiring web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Description

DESCRIZIONE dell?invenzione industriale dal titolo: DESCRIPTION of the industrial invention entitled:

?Testa rotativa per termosaldatura" ?Rotary head for heat sealing"

TESTO DELLA DESCRIZIONE DESCRIPTION TEXT

La presente invenzione si riferisce in generale alla termosaldatura, e riguarda pi? in particolare sistemi per termosaldare nastri di materiale termosaldabile. Siffatti nastri vengono utilizzati, ad esempio, per il rivestimento di manufatti di vario genere e tipo, ad esempio di sedili per autoveicoli. The present invention relates generally to heat sealing, and more in particular systems for heat-sealing tapes of heat-sealable material. Such tapes are used, for example, for covering articles of various kinds and types, for example seats for motor vehicles.

Durante la produzione, allorch? un nastro si esaurisce occorre saldarne la coda con un il fronte di nuovo nastro lungo una linea trasversale di unione reciproca. Questa operazione deve essere condotta in modo efficiente e rapido allo scopo di ridurre il pi? possibile i tempi morti. During production, when? when a ribbon runs out, its tail must be welded to the front of a new ribbon along a reciprocal transversal joining line. This operation must be carried out efficiently and quickly in order to reduce the most? downtime possible.

Sono noti nella tecnica sistemi di termosaldatura che utilizzano ruote o rulli la cui periferia ? riscaldata elettricamente: si tratta per lo pi? di installazioni fisse rispetto alle quali gli articoli da termosaldare longitudinalmente vengono fatti traslare, come ad esempio nel caso dei documenti EP0885810 A1 e CN10415933A. Heat-sealing systems are known in the art which use wheels or rollers whose periphery ? electrically heated: it is mostly? of fixed installations with respect to which the items to be heat-sealed longitudinally are moved, as for example in the case of documents EP0885810 A1 and CN10415933A.

Lo scopo della presente invenzione ? quello di rendere disponibile una soluzione pratica e funzionale al suddetto problema tecnico, e tale scopo viene conseguito grazie ad una testa rotativa di termosaldatura per saldare la coda di un nastro di materiale termosaldabile in esaurimento con il fronte di un nuovo nastro di materiale termosaldabile lungo una linea di unione trasversale reciproca, comprendente una ruota o rullo ad asse orizzontale recante sulla sua periferia un resistore riscaldante anulare sporgente radialmente, ed un dispositivo di alimentazione elettrica del resistore. Il rullo o ruota ? girevole entro un supporto traslabile orizzontalmente lungo la linea trasversale di unione ed ? spostabile verticalmente per variare la pressione del resistore riscaldante sulla linea di unione. The purpose of the present invention ? that of making available a practical and functional solution to the aforementioned technical problem, and this object is achieved thanks to a heat-sealing rotary head for welding the tail of a tape of heat-sealable material about to run out with the front of a new tape of heat-sealable material along a reciprocal transversal joining line, comprising a wheel or roller with a horizontal axis bearing on its periphery a radially protruding annular heating resistor, and an electric power supply device for the resistor. The roller or wheel? rotatable within a support that can be moved horizontally along the transversal line of union and ? vertically movable to vary the pressure of the heating resistor on the joining line.

Grazie a questa idea di soluzione la saldatura fra coda e fronte dei due nastri pu? essere effettuata in modo rapido ed efficiente arrestando per un breve periodo la traslazione longitudinale dei nastri al di sotto della testa rotativa, la quale viene quindi abbassata e traslata trasversalmente ai nastri fino a completare la linea di unione trasversale reciproca. La pressione della ruota o rullo sulla linea di unione pu? essere anche incrementata in misura tale da realizzarne il taglio, il che risulta particolarmente vantaggioso allorch? la coda e il fronte dei due nastri sono fra loro sovrapposti anzich? essere disposti l'uno sul prolungamento dell'altro. Thanks to this idea of solution the welding between tail and front of the two tapes can? be carried out quickly and efficiently by stopping for a short time the longitudinal translation of the strips below the rotary head, which is then lowered and transversely translated to the strips until the reciprocal transversal joining line is completed. The pressure of the wheel or roller on the seam can? also be increased to such an extent as to realize the cut, which is particularly advantageous when? the tail and the front of the two ribbons are overlapped instead of? be arranged one on the extension of the other.

Secondo una forma preferita di attuazione dell'invenzione il supporto contiene un collettore stazionario a spazzole associato all'asse del rullo o ruota per trasmettere l'alimentazione elettrica al resistore riscaldante. According to a preferred embodiment of the invention the support contains a stationary brush collector associated with the axis of the roller or wheel for transmitting the electrical power to the heating resistor.

Ulteriori caratteristiche e vantaggi dell'invenzione risulteranno evidenti dalla dettagliata descrizione che segue, con riferimento ai disegni annessi forniti a puro titolo di esempio non limitativo, nei quali: Further characteristics and advantages of the invention will become apparent from the detailed description which follows, with reference to the attached drawings provided purely by way of non-limiting example, in which:

- la figura 1 ? una vista schematica in elevazione frontale di una testa rotativa di termosaldatura secondo una forma di attuazione preferita dell'invenzione, - figure 1 ? a schematic front elevation view of a heat sealing rotary head according to a preferred embodiment of the invention,

- la figura 2 ? una vista in sezione verticale della testa rotativa, - figure 2 ? a vertical sectional view of the rotary head,

- la figura 3 mostra in maggiore scala ed in elevazione un particolare della testa rotativa, e - figure 3 shows a detail of the rotary head on a larger scale and in elevation, e

- le figure 4-5, 6-7 e 8-9 sono viste schematiche rispettivamente in pianta dall'alto ed in elevazione laterale che mostrano possibili esempi di termosaldatura di nastri operata dalla testa rotativa secondo l'invenzione. - figures 4-5, 6-7 and 8-9 are schematic top plan views and side elevation views, respectively, showing possible examples of heat sealing of tapes performed by the rotary head according to the invention.

Riferendosi inizialmente alla figura 1 la testa rotativa secondo l'invenzione comprende essenzialmente un involucro scatolare 1 in forma di settore circolare dotato inferiormente di un'apertura 2 e fissato lateralmente ad una staffa 3 a sua volta portata da un carrello o slitta 4 traslabile lungo una traversa orizzontale 5. Come si vedr? nel seguito la traversa 5 ? situata trasversalmente al di sopra della zona di scorrimento dei nastri di materiale termosaldabile che, nell'impiego della testa rotativa, vengono sottoposti a termosaldatura. Referring initially to figure 1, the rotary head according to the invention essentially comprises a box-like casing 1 in the form of a circular sector provided at the bottom with an opening 2 and laterally fixed to a bracket 3 which in turn is carried by a trolley or slide 4 which can be moved along a horizontal crossbar 5. How will you see? below the crossbar 5 ? situated transversely above the sliding area of the heat-sealable material ribbons which, in the use of the rotary head, are subjected to heat-sealing.

Fra la staffa 3 e la slitta 4 ? disposto un attuatore lineare 6, tipicamente un martinetto a fluido o elettrico, tramite il quale il supporto 1 ? spostabile verticalmente rispetto ai nastri sottoposti a termosaldatura. Between bracket 3 and slide 4 ? arranged a linear actuator 6, typically a fluid or electric jack, through which the support 1 is vertically movable with respect to heat-sealed tapes.

La movimentazione della slitta 4 lungo la traversa 5 e lo spostamento verticale del supporto 1 relativamente alla slitta 4 sono operati con mezzi convenzionali e alla portata del tecnico del ramo. The movement of the slide 4 along the crosspiece 5 and the vertical displacement of the support 1 relative to the slide 4 are operated by conventional means and within the reach of the person skilled in the art.

Riferendosi ora in maggiore dettaglio alla figura 2 il supporto 1 contiene una ruota o rullo 7 verticale e girevole su un albero orizzontale 8 parallelo alla traversa 5. La ruota o rullo 7 sporge inferiormente dall'apertura 2 del supporto 1 e presenta una scanalatura anulare periferica nella quale ? alloggiato un resistore riscaldante anulare 9 sporgente radialmente. Il resistore riscaldante 8 opera tramite effetto Joule ed a tale effetto esso ? alimentato elettricamente tramite un collettore 10, rappresentato in dettaglio nella figura 3. Tale collettore 10 comprende una coppia di dischi circolari 11 calettati sull'albero 8 della ruota o rullo 7 e con ciascuno dei quali ? in contatto di strisciamento una coppia di spazzole 12 collegate tramite cablaggi 13 all'alimentazione elettrica. Referring now in greater detail to figure 2, the support 1 contains a wheel or roller 7 that is vertical and rotates on a horizontal shaft 8 parallel to the crosspiece 5. The wheel or roller 7 protrudes downwards from the opening 2 of the support 1 and has a peripheral annular groove in which ? housed a radially protruding annular heating resistor 9. The heating resistor 8 operates through the Joule effect and to this effect it ? electrically powered through a collector 10, shown in detail in figure 3. This collector 10 comprises a pair of circular discs 11 keyed onto the shaft 8 of the wheel or roller 7 and with each of which ? in sliding contact a pair of brushes 12 connected by cables 13 to the electric power supply.

Nel funzionamento il resistore 9, riscaldato per effetto joule attraverso il collettore 10, opera la termosaldatura di due nastri di materiale termosaldabile che devono essere fra loro uniti lungo una linea di reciproca unione trasversale. Le figure 4-5, 6-7 e 8-9 mostrano possibili esempi di siffatte linee di unione trasversale realizzate dalla testa rotativa secondo l'invenzione, mossa lungo la traversa 5 con la periferia della ruota a rullo 7 mantenuta in contatto con la superficie dei nastri. Nel caso delle figure 4 e 5 la coda del nastro di materiale termosaldabile in esaurimento A ? sovrapposta al fronte del successivo nastro di materiale termosaldabile B e la testa rotativa di termosaldatura, schematizzata dalla ruota o rullo 7 con il resistore anulare 9, realizza durante la sua traslazione lungo la traversa 5 la linea di saldatura C. In operation, the resistor 9, heated by the joule effect through the collector 10, heat-welds two ribbons of heat-sealable material which must be joined together along a mutual transversal joining line. Figures 4-5, 6-7 and 8-9 show possible examples of such transversal joining lines made by the rotary head according to the invention, moved along the crosspiece 5 with the periphery of the roller wheel 7 kept in contact with the surface some tapes. In the case of figures 4 and 5, the end of the ribbon of heat-sealable material nearing completion A? superimposed on the front of the subsequent band of heat-sealable material B and the heat-sealing rotary head, schematized by the wheel or roller 7 with the annular resistor 9, creates the welding line C during its translation along the crosspiece 5.

Nel caso delle figure 6 e 7 la disposizione ? invertita, nel senso che la coda del nastro in esaurimento A ? disposta al di sotto del fronte del nuovo nastro B, mentre nel caso delle figure 8 e 9 i due nastri A e B sono orientati nella stessa direzione anzich? essere disposti l'uno sul prolungamento dell'altro. In quest'ultimo caso a seguito della formazione della linea di unione trasversale reciproca C il nastro A oppure il nastro B viene ripiegato sul prolungamento dell'altro dopo che eventualmente le rispettive porzioni sporgenti dei due nastri sono state asportate applicando alla ruota o rullo 7, tramite l'attuatore 6, la necessaria pressione durante la termosaldatura attuata dal resistore 9. In the case of figures 6 and 7 the arrangement ? reversed, in the sense that the tail of the tape running out A ? arranged below the front of the new strip B, while in the case of figures 8 and 9 the two strips A and B are oriented in the same direction instead of? be arranged one on the extension of the other. In the latter case, following the formation of the reciprocal transversal joining line C, the tape A or the tape B is folded over the extension of the other after possibly the respective protruding portions of the two tapes have been removed by applying to the wheel or roller 7, through the actuator 6, the necessary pressure during the heat sealing actuated by the resistor 9.

Naturalmente i particolari di costruzione e le forme di realizzazione potranno essere ampiamente variati rispetto a quanto descritto ed illustrato senza per questo uscire dall'ambito della presente invenzione cos? come definita nelle rivendicazioni che seguono. Of course, the details of construction and the embodiments can be varied widely with respect to what has been described and illustrated without thereby departing from the scope of the present invention as follows: as defined in the following claims.

Claims (3)

RIVENDICAZIONI 1. Testa rotativa di termosaldatura per saldare la coda di un nastro di materiale termosaldabile in esaurimento (A) con il fronte di un nuovo nastro di materiale termosaldabile (B) lungo una linea di unione reciproca (C), detta testa comprendendo una ruota o rullo (7) ad asse orizzontale (8) recante sulla sua periferia un resistore riscaldante anulare (9) sporgente radialmente, ed un dispositivo di alimentazione elettrica (10) del resistore riscaldante (9), caratterizzata dal fatto che il rullo o ruota (7) ? girevole entro un supporto (1) traslabile orizzontalmente lungo detta linea trasversale di unione (C) e spostabile verticalmente per variare la pressione del resistore riscaldante (9) su detta linea trasversale di unione (C).1. Rotary heat-sealing head for welding the tail of a ribbon of heat-sealable material nearing completion (A) with the front of a new ribbon of heat-sealable material (B) along a reciprocal joining line (C), said head comprising a wheel or roller (7) with a horizontal axis (8) bearing on its periphery a radially protruding annular heating resistor (9), and an electric power supply device (10) for the heating resistor (9), characterized in that the roller or rotates (7 ) ? rotatable within a support (1) which can move horizontally along said transversal joining line (C) and can be moved vertically to vary the pressure of the heating resistor (9) on said transversal joining line (C). 2. Testa rotativa secondo la rivendicazione 1, caratterizzata dal fatto che detto supporto (1) contiene un collettore stazionario a spazzole (10, 11, 12) associato all'asse (8) del rullo o ruota (7) per trasmettere l'alimentazione elettrica a detto resistore riscaldante (9).2. Rotary head according to claim 1, characterized in that said support (1) contains a stationary collector with brushes (10, 11, 12) associated with the axis (8) of the roller or wheel (7) for transmitting the power electricity to said heating resistor (9). 3. Testa rotativa secondo la rivendicazione 1 o la rivendicazione 2, caratterizzata dal fatto che per lo spostamento verticale di detto supporto (1) ? previsto un attuatore a fluido o elettrico (6). 3. Rotary head according to claim 1 or claim 2, characterized in that for the vertical displacement of said support (1) ? a fluid or electric actuator (6) is provided.
IT102020000018583A 2020-07-30 2020-07-30 ROTARY HEAD FOR HEAT-SEALING IT202000018583A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430920A (en) * 1942-12-18 1947-11-18 Celanese Corp Electrically heated tool for uniting sheet material
US2589777A (en) * 1949-07-09 1952-03-18 William F Stahl Plastic-sealing apparatus
US2591383A (en) * 1950-03-11 1952-04-01 William F Stahl Plastic-sealing element
FR2221344A1 (en) * 1973-03-16 1974-10-11 Ralton Ab
EP0885810A1 (en) 1997-06-17 1998-12-23 Illinois Tool Works Inc. Rotary heat sealer
US6342118B1 (en) * 2000-03-15 2002-01-29 Martin Automatic Inc. Heat splicer and heat-seal splicing method
CN104159733A (en) 2011-12-22 2014-11-19 纳幕尔杜邦公司 Low temperature sealing films

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430920A (en) * 1942-12-18 1947-11-18 Celanese Corp Electrically heated tool for uniting sheet material
US2589777A (en) * 1949-07-09 1952-03-18 William F Stahl Plastic-sealing apparatus
US2591383A (en) * 1950-03-11 1952-04-01 William F Stahl Plastic-sealing element
FR2221344A1 (en) * 1973-03-16 1974-10-11 Ralton Ab
EP0885810A1 (en) 1997-06-17 1998-12-23 Illinois Tool Works Inc. Rotary heat sealer
US6342118B1 (en) * 2000-03-15 2002-01-29 Martin Automatic Inc. Heat splicer and heat-seal splicing method
CN104159733A (en) 2011-12-22 2014-11-19 纳幕尔杜邦公司 Low temperature sealing films

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