EP1276688A2 - Mandrin de serrage pneumatique pour machines d'embobinage de bande a ame creuse et dispositif de positionnement associe - Google Patents

Mandrin de serrage pneumatique pour machines d'embobinage de bande a ame creuse et dispositif de positionnement associe

Info

Publication number
EP1276688A2
EP1276688A2 EP98950300A EP98950300A EP1276688A2 EP 1276688 A2 EP1276688 A2 EP 1276688A2 EP 98950300 A EP98950300 A EP 98950300A EP 98950300 A EP98950300 A EP 98950300A EP 1276688 A2 EP1276688 A2 EP 1276688A2
Authority
EP
European Patent Office
Prior art keywords
mandrel
expander
duct
seats
pistons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98950300A
Other languages
German (de)
English (en)
Inventor
Pietro Prati
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Officina Meccanica Prati Pietro
Original Assignee
Officina Meccanica Prati Pietro
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 Officina Meccanica Prati Pietro filed Critical Officina Meccanica Prati Pietro
Publication of EP1276688A2 publication Critical patent/EP1276688A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/28—Arrangements for positively securing ends of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41422—Starting winding process involving mechanical means
    • B65H2301/414225—Starting winding process involving mechanical means fixed to shaft or mandrel, e.g. clamping or pinching leading edge to shaft or mandrel

Definitions

  • the field of application of the present invention concerns the winding machines of webs or tapes made of paper or plastic material .
  • the subject of the present invention is a mandrel, which is mountable on the aforesaid said machines, specifically addressed for making coreless rolls of said webs or tapes , in cooperation with means for the positioning of the webs in order to automatically insert their initial edges into the suitable seats of the mandrel .
  • machines for winding rolls or bobbins of web-like materials like paper or plastic
  • mandrels whereon a support of plastic or other material suitable for such a function, usually of cylindrical shape, is inserted and thereto the initial edge of the web to be wound is fixed ; the necessity of such a support is dictated either by the final use of the rolls, for example in labeling machines, either, also, by the difficulty of winding the webs without said support in a totally automatic way.
  • Furthe.rmore the use of the core, when it is not dictated by its function, comports longer winding time to obtain the rolls and more complex operations , due to the necessary fixing of the front edge of the web material to the core and the insertion of the latter on the mandrel , which are manual operations ; also , the reliability of the production process, due to (whenever the securing of the initial edge should fail) the possible slipping of the paper about the core, would be affected.
  • the present invention solves the above mentioned problems by means of a mandrel configured for being actuated by pneumatic means and which overcome the need of the core of millboard or other material by means of clamps for gripping the leading edge of the web .
  • the mandrel of the present invention vis-a-vis the prior-art improves the clamping system for gripping the leading edge of the web material to be wound and allows the complete automation of the operation of leading the front edge to the mandrel clamping system and of securing it for initial winding .
  • Said automation is achieved by means of a transport system which cooperates with the mandrel and suitable for leading the front edge of the web towards the clamping system and providing automatic insertion into the slot of the mandrel clamps , as better described below .
  • the main embodiment of the invention and its functioning is better e.xplained by means of Figureures , whereas
  • FIG. 1 shows the cross-section of the clamping mandrel and its elements of the preferred embodiment.
  • FIG. 2 shows the plant of the clamping mandrel and the shape of its body for lodging the various working elements .
  • FIG. 8 represents the schematic view of the web winding machine for the understanding of the mechanism of the present invention, for what concerns the leading of the band edge towards the mandrel .
  • - Figure 9 shows in details the mechanism of insertion of the band into the mandrel .
  • two seats 13 and 14 are shaped for lodging respectively the expander 2 and the clamping expander 3 , actuated by pistons 4 and 5 ; a duct 6 for the adduction of compressed air is drilled along the axes of the body of said mandrel 1.
  • the duct 6 is communicating with the series of seats 7, therein said pistons 6 , 7 are lodged as illustrated by Figure 2.
  • the number of pistons and their spacing is determined by the length of mandrel 1 , so as to assure that expanders 2 and 3 are actuated for its entire length without misalignments.
  • the preferred embodiment of the mandrel shows the duct 6 closed by the cap 8 so to form a closed chamber, wherein the pressurised air exercises pressure on the pistons 4 and 5 lodged in seats 7.
  • pistons 4 and 5 are provided, respectively, by O-rings 15 and 16.
  • the expander 2 is connected to pistons 4 by means of screws 9 : these screws 9 are calibrated for allowing between said pistons 4 and said expander 2 a clearance 10 of the order of some tenth of millimeter ; said clearance 10 allows a freedom degree in the positioning of said expander 2 for an easier lock of the opening 13 of the mandrel during the expansion phase .
  • the expander 3, which acts as a clamp, is let disconnected from pistons 5, and therefore, when it is in idle state (absence of pression in chamber 6) it falls by gravity, leaning against the shaped wall of mandrel 1 and so letting a greater opening between itself and the interior wall 13 of the shaped cavity of said mandrel 1.
  • Said expander 3 which in the closed position (expansion) grips the leading edge of the web, is provided along its length with a rubber or plastic string 12 apt to secure a better grip of said leading edge of the web.
  • Mandrel 1 is crossed in each of the seats 7 of the pistons 4 and 5 , and in correspondence with duct 6 , by plugs 11 acting as separators of pistons 4 and 5, in order to avoid that in the opening phase (e.xpiration of air from duct 6) said pistons 4 and 5 would close entirely the hole 6 , so compromising its functioning : in fact in the following phase of expansion, the compress air in the so obstructed duct 6 would impede the outwardly pushing of pistons 4 and 5.
  • a transport and positioning mechanism hereinafter better described, leads the front edge of the web into the slot 13, between the clamping expander 3 and the internal wall of the mandrel, as shown in Figure 6. Subse-quently, it is admitted compressed air which acting on pistons 4 and 5 pushes outwardly the eapanders 2 and 3, so that the external walls of the eacpanders adhere with the internal walls of the shaped seats of mandrel 1 and, indeed, closing air-tigthnessly the opening of said mandrel 1.
  • the clamping expander 3 grips and holds the band to be wound during the rotation of mandrel 1 till the completion of the entire roll .
  • the evacuation of air from duct 6 makes pistons to be moved by depression towards the interior of mandrel 1 ; the expander 2 it is retracted and the expander 3 falls, by gravity, against the internal wall of its seat while opening the slot 13 and so allowing the easy slipping of the mandrel 1 of the roll .
  • the embodiment of the present invention makes use of two expanders in order to , when the winding is completed, help removing the roll from the mandrel : the second expander 2, when retracted, creates an embossed zone on the external surface of mandrel 1 so impeding the adhesion of the first turn of the roll to said mandrel and its possible unwinding.
  • a block 19, comprising two guiding rollers 20 and 21, lifts up at the initial phase of winding, and displaces from the initial position 22 to the position 23 next to the mandrel 1 ; at the same time the arms 17 and 18, fixed on the axis of rollers 20 and 21 rotate in order to precisely position the leading edge of the web for the insertion into slot 13 of the open clamp 3.
  • mandrel 1 The positioning of mandrel 1 is obtained by means of mechanical phasers ; said phasers are transmission organs comprising a heart shaped cam acted by pistons : the concave zone of said cam corresponds to the idle mechanism of rotation of the mandrel, which, therefore, stops always in the same angular position.
  • the displacement of block 19 and of the arms 17 and 18, in order to insert automatically the front edge of the web into slot 13 of clamp 3 are pneumatically controlled and coordinated by means of microprocessors, so as the control of the adduction and emission of air phases of the compressed air in duct 6.
  • Mandrel 1 is set to the right angular position for the automatic insertion of the leading edge of the web by means of a pneumatically controlled heart shaped cam.
  • a pneumatically controlled heart shaped cam it is not a limit to other possible embodiments that the mandrel of the present invention can permit without addition of the described subject matter ; also, the pneumatic control of the expanders should not be considered as narrowing the disclosure by excluding different electro-mechanical embodiments based on the same Paving do not extend the present subject matter.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding Of Webs (AREA)

Abstract

Cette invention concerne un mandrin (1) adapté à des machines d'embobinage de bande à âme creuse. Le mandrin contient deux extenseurs (2, 3) actionnés pneumatiquement par des cylindres (4, 5). Un des extenseurs sert à prendre et à serrer le bord avant de la bande devant être enroulée pour former des rouleaux à âme creuse. Cette invention concerne également un dispositif assurant le transport du bord avant de la bande jusqu'au dispositif de serrage du mandrin.
EP98950300A 1997-10-14 1998-10-13 Mandrin de serrage pneumatique pour machines d'embobinage de bande a ame creuse et dispositif de positionnement associe Withdrawn EP1276688A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT97PC000030 IT1296233B1 (it) 1997-10-14 1997-10-14 Mandrino pneumatico a pinza per macchine per avvolgimento di bobine di carta senza anima
ITPC970030 1997-10-14
PCT/IT1998/000274 WO1999019241A2 (fr) 1997-10-14 1998-10-13 Mandrin de serrage pneumatique pour machines d'embobinage de bande a ame creuse et dispositif de positionnement associe

Publications (1)

Publication Number Publication Date
EP1276688A2 true EP1276688A2 (fr) 2003-01-22

Family

ID=11389267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98950300A Withdrawn EP1276688A2 (fr) 1997-10-14 1998-10-13 Mandrin de serrage pneumatique pour machines d'embobinage de bande a ame creuse et dispositif de positionnement associe

Country Status (5)

Country Link
EP (1) EP1276688A2 (fr)
AU (1) AU9644098A (fr)
CA (1) CA2306470A1 (fr)
IT (1) IT1296233B1 (fr)
WO (1) WO1999019241A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148502B4 (de) * 2001-10-01 2005-05-12 Koenig & Bauer Ag Vorrichtung zum Aufwickeln einer Materialbahn
US7789338B2 (en) 2006-02-27 2010-09-07 A. Celli Nonwovens S.P.A. Winding rod for winding reels of weblike material, and machine that uses said rod
CN105540303A (zh) * 2015-12-25 2016-05-04 佛山市启达研磨器材科技有限公司 一种收卷棍结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061224A (en) * 1960-01-18 1962-10-30 Herr Equipment Corp Apparatus for coiling strip material
JPS57112259A (en) * 1980-12-02 1982-07-13 Achilles Corp Manufacture of coreless roll material
JPH02243449A (ja) * 1989-03-17 1990-09-27 Fuji Elelctrochem Co Ltd 帯状材の先端部をリールに巻付ける装置
US5518200A (en) * 1992-04-15 1996-05-21 Kaji Seisakusho Y.K. Method of producing coreless toilet paper rolls and the coreless toilet paper produced thereby
JP2597864Y2 (ja) * 1993-10-18 1999-07-19 株式会社サトー 帯状体の巻取機構

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9919241A3 *

Also Published As

Publication number Publication date
IT1296233B1 (it) 1999-06-18
AU9644098A (en) 1999-05-03
ITPC970030A1 (it) 1998-01-14
WO1999019241A2 (fr) 1999-04-22
CA2306470A1 (fr) 1999-04-22
WO1999019241A3 (fr) 1999-07-08

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