EP1040895B1 - Band saw for continuous cutting of logs of web material - Google Patents

Band saw for continuous cutting of logs of web material Download PDF

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Publication number
EP1040895B1
EP1040895B1 EP20000102850 EP00102850A EP1040895B1 EP 1040895 B1 EP1040895 B1 EP 1040895B1 EP 20000102850 EP20000102850 EP 20000102850 EP 00102850 A EP00102850 A EP 00102850A EP 1040895 B1 EP1040895 B1 EP 1040895B1
Authority
EP
European Patent Office
Prior art keywords
cutting
band
log
conveyor
band saw
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.)
Expired - Lifetime
Application number
EP20000102850
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1040895A3 (en
EP1040895A2 (en
Inventor
Renato Matteucci
Mauro Biagioni
Giuseppe Lupi
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.)
Paper Converting Machine Co Italia SpA
Original Assignee
Paper Converting Machine Co Italia SpA
Paper Converting Machine Co
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 Paper Converting Machine Co Italia SpA, Paper Converting Machine Co filed Critical Paper Converting Machine Co Italia SpA
Publication of EP1040895A2 publication Critical patent/EP1040895A2/en
Publication of EP1040895A3 publication Critical patent/EP1040895A3/en
Application granted granted Critical
Publication of EP1040895B1 publication Critical patent/EP1040895B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/46—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having an endless band-knife or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/11—Machines or methods used for cutting special materials for cutting web rolls

Definitions

  • the present invention refers to a band saw for cutting rolls or logs of web material according to the preamble of claim 1, particularly suitable to be included in a continuous production process.
  • An example of such a band saw is disclosed by EP-A-391 865.
  • band saws similar to those used for cutting ferrous materials comprising a heavy base, carrying the flywheels and the cutting band, pivotally mounted, driven by hydraulic cylinders.
  • Such a type of saw is extremely complex, difficult to maintain and slow in operation.
  • band saws whose cutting blade is made to advance horizontally toward the logs to be cut conveyed by a conveyor driven by a chain wound on wheels.
  • EP-A-0391865 describes a cutting off machine comprising cutting means mounted on an arm provided with reciprocating or oscillating motion.
  • the object of the invention is to remove these drawbacks, providing a band saw for cutting logs with large diameters, for example from 240 to 520 mm, which is extremely fast, versatile and suitable for a continuous production process.
  • the cutting band which works in an intermediate area of a continuous conveyor, to be made to advance vertically toward the logs to be cut.
  • Use of a continuous conveyor means that loading of a new log can take place even during the period in which the previous log is being cut by the steel band.
  • the feed system is therefore designed so that the cutting band does not interfere with the conveyor.
  • a vertical slot is provided in the supporting guide of the log to allow passage of the cutting blade.
  • Means for holding the log of paper still during cutting are provided. Once cutting has been carried out said means cause the log to withdraw slightly, so as to ensure the return of the cutting blade.
  • the band saw according to the invention can work in a considerably shorter cycle time with respect to the band saws of the prior art, thanks in particular to the fact that the log conveyor advances continuously without making the to and fro movements of the reciprocating conveyors of the prior art.
  • Figure 1 shows a band saw according to the invention, denoted as a whole by reference numeral 100, comprising a cutting assembly 200, to which the rolls of paper or logs 12 are fed by means of a conveyor assembly 300.
  • the cutting assembly 200 comprises a cutting tool 1, normally consisting of a steel band about 1.2 mm thick and 60 mm wide, the side of which is suitably chamfered to form a cutting edge 1'.
  • the band 1 is wound on two flywheels 2 and 3, the flywheel 3 being motorized by an electric or hydraulic motor 4 ( Figure 2b), by means of a cogged belt transmission 5.
  • the flywheel 2 on the other hand, is mounted idle on a sliding support 6 controlled by a hydraulic piston 7 so as to have the band 1 constantly under tension.
  • FIGs 3 and 3a show the conveyor assembly 300 for feeding the logs of paper 12 to the cutting assembly 200.
  • the conveyor assembly 300 comprises a horizontal conveyor 8 formed by a chain or conveyor belt that winds on two wheels or rollers 9 and 10, the roller 10 being motorized.
  • Pusher arms 11, commonly called slaves are secured to the chain 8. Said pusher arms 11 are positioned at a sufficient distance to be able to receive a log of paper for cutting between one pusher arm and the other.
  • the logs of paper 12, pushed by the pusher arms 11, are made to slide on two longitudinal guide surfaces 13 and 14 disposed obliquely to form a V-shaped support as shown in Figure 3.
  • the guide surfaces 13 and 14 have two aligned slits respectively at the side of the cutting assembly 200 to allow passage of the cutting band 1, one of which slits 350 in the guide surface 13 is visible in Figure 1.
  • the conveyor 8 is provided with intermittent pulse movement synchronized with the movement of the cutting assembly 200.
  • the step length of the conveyor 8 is equal to the desired cutting length of the log 12.
  • Loading of a log of paper 12 on the conveyor 8 can also be carried out during the time in which the preceding log is cut by the steel band 1. This is possible by virtue of the fact that the pusher arms 11 can rotate on the cogged wheels 9 and 10 integrally with the chain 8 and do not interfere with the cutting band 1.
  • the flywheels 3 and 4 are supported by a single structure consisting of a frame 15 which can slide vertically on two linear guides 16 and 17 with balls or ball bearings.
  • the guides 16 and 17 are supported by a load-bearing portal 18.
  • the flywheels 3 and 4 are mounted so as to have their axis inclined by 60° with respect to the vertical.
  • the branch of the band 1 that makes the cut is bent by means of blade-guiding cylinders 19 so that it is disposed at right angles to the axis of the log to be cut and obviously parallel to the direction of travel of the flywheel frame 15.
  • blade-guiding cylinders 19 also serve to prevent bending of the band during cutting.
  • This flywheel configuration is such that the branch of the blade not involved in cutting does not interfere with the log of paper, so as to be able to make cuts of any length.
  • a sharpening device 20 consisting of two grinding wheel assemblies driven by air turbines is mounted on the frame 15 that supports the flywheels, on the side of the branch of the band not involved in cutting. In this manner it is possible to carry out sharpening of the band 1 even when said band is cutting.
  • the flywheel supporting frame 15 is driven with a reciprocating vertical movement by means of a screw 21 and nut-screw 22 assembly (Figure 2c) with planetary rollers.
  • the screw 21 is secured rigidly to the frame 15 to be driven and the nut-screw 22 is keyed into a bushing 23 which in turn is mounted by means of rolling-contact bearings 60 in a fixed support 24 integral with the load-bearing portal 18.
  • a cogged pulley 25 on which is wound a cogged belt 26 which transmits the power necessary to drive the flywheel bearing frame 15, provided with an electric motor 27.
  • the speed of the motor 27 can be controlled electronically so as to be able to drive the flywheel bearing frame 15 with reciprocating motion at controlled speed, stroke and acceleration/deceleration.
  • the cutting assembly 200 makes a vertical forward stroke toward the log 12 to be cut, which is conveyed by the conveyor assembly 300; thus the top dead center or end of stroke position can be regulated, as shown in Figure 5, according to the diameter of the log of paper to be cut.
  • Figures 4a-4d show the kinematic motion of the cutting process.
  • the locking device 150 comprises two pressure assemblies 151 and 152, formed respectively by a frame ending in respective plates 160, 161 shaped with a concave shape to be able to compress the surface of the log to be cut.
  • the pressure assemblies 151 and 152 are operated respectively by two pneumatic pistons 153 and 154 that push the plates 160, 161 vertically onto the log of paper. A sufficient gap 155 is left between the two pressure assemblies to allow the passage of the cutting band 1.
  • the pressure assembly 152 can slide horizontally on two linear guides 156 parallel to the conveyor 8.
  • the horizontal movement of the pressure assembly parallel to the conveyor 8 is controlled by a pneumatic piston 157.
  • the piston 157 is operated which allows the pressure assembly 152 to slide a few millimetres on the guides 156. This sliding takes place in the opposite direction to the direction of travel of the logs, in order to move the cut piece 12'' of log in the direction of the arrow F3 ( Figure 4d). In this manner the cutting band 1 is allowed to rise again in the direction of the arrow F4 without interfering with the log of paper.
  • This horizontal movement of the pressure roller 152 is synchronized with the motor of the conveyor 8 that controls a withdrawal of the pusher arms 11 of the same entity.
EP20000102850 1999-03-29 2000-02-11 Band saw for continuous cutting of logs of web material Expired - Lifetime EP1040895B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI990641 1999-03-29
ITMI990641 IT1312032B1 (it) 1999-03-29 1999-03-29 Sega a nastro per il taglio in continuo di rotoli di materiale infoglio.

Publications (3)

Publication Number Publication Date
EP1040895A2 EP1040895A2 (en) 2000-10-04
EP1040895A3 EP1040895A3 (en) 2002-08-21
EP1040895B1 true EP1040895B1 (en) 2005-01-26

Family

ID=11382488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000102850 Expired - Lifetime EP1040895B1 (en) 1999-03-29 2000-02-11 Band saw for continuous cutting of logs of web material

Country Status (4)

Country Link
EP (1) EP1040895B1 (it)
DE (1) DE60017627T2 (it)
ES (1) ES2235693T3 (it)
IT (1) IT1312032B1 (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10345353A1 (de) * 2003-09-18 2005-04-28 Behringer Gmbh Sägemaschine und Verfahren zur Antriebssteuerung einer Sägemaschine
ITFI20060292A1 (it) * 2006-11-24 2008-05-25 Futura Spa Troncatrice per logs di materiale cartaceo.
ITFI20070279A1 (it) 2007-12-12 2009-06-13 Futura Spa Dispositivo per lo scarto dei rifili che si formano con il taglio dei logs di materiale cartaceo
IT1401683B1 (it) * 2010-08-27 2013-08-02 Gambini Int Sa Dispositivo di taglio per rotoli di materiale nastriforme, in particolare cartaceo.
EP2450481B1 (de) * 2010-11-04 2013-01-23 Karl Mayer Malimo Textilmaschinenfabrik GmbH Vorrichtung und Verfahren zum Herstellen von Mono- oder Multiaxialgelegen
JP5759361B2 (ja) * 2011-12-27 2015-08-05 株式会社アマダホールディングス 帯鋸盤及び帯鋸盤の制御方法
CN103042554B (zh) * 2013-01-05 2015-02-04 晋江海纳机械有限公司 一种卷筒纸分切机
IT201800004970A1 (it) * 2018-04-27 2019-10-27 Metodo, impianto e struttura di lama per il taglio di log di carta e simili materiali
RU199501U1 (ru) * 2020-02-07 2020-09-04 Общество с ограниченной ответственностью «Копицентр» Устройство для резки

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049954A (en) * 1957-06-03 1962-08-21 Fmc Corp Apparatus for cutting articles
US3872762A (en) * 1973-09-04 1975-03-25 Hoe & Co R Band saw system
US4111085A (en) * 1977-05-10 1978-09-05 Lockheed Corporation Compound curvature cutting machine
IT1233279B (it) * 1989-04-05 1992-03-26 Perini Finanziaria Spa Troncatrice per il taglio di bastoni di materiale cartaceo e simili
JP2759772B2 (ja) * 1995-02-17 1998-05-28 有限会社加地製作所 ログペーパー切断装置

Also Published As

Publication number Publication date
ITMI990641A1 (it) 2000-09-29
DE60017627D1 (de) 2005-03-03
DE60017627T2 (de) 2006-01-05
EP1040895A3 (en) 2002-08-21
ES2235693T3 (es) 2005-07-16
IT1312032B1 (it) 2002-04-04
EP1040895A2 (en) 2000-10-04

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