PAPERBOARD SHEET SLITTER-SCORER APPARATUS AND CONTROL METHOD FOR CORRECTING THE POSITIONS OF SLITTER KNIVES AND SCORERS THEREOF

• US 20120031251A1
• Filed: 08/02/2011
• Published: 02/09/2012
• Est. Priority Date: 08/06/2010
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Isowa
• Original Assignee: Kabushiki Kaisha Isowa
• Inventors: Momonaka, Hiroki, Suzuki, Michio, Sawayama, Kazuya
• Application Number:
  US13/196,319
• Publication Number:
  US 20120031251A1
• Time in Patent Office: Days
• US Class Current: 83/864
• CPC Class Codes: B26D 1/245 for thin material, e.g. for sheets, strips or the like
• CPC Class Codes: B26D 3/085 On sheet material
• CPC Class Codes: B26D 5/00 Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
• CPC Class Codes: B26D 7/2635 for circular cutters
• CPC Class Codes: B31F 1/10 by rotary tools
• CPC Class Codes: Y10T 83/0222 Plural independent rotary scoring blades

Abstract

A slitter-scorer apparatus is provided, capable of effectively positioning slitter knives in the width direction so that a paperboard sheet of a desired sheet width can be obtained. The slitter scorer apparatus 1 of the present invention comprises a plurality of slitters 6 having slitter knives 80 and 82 paralelly disposed in the width direction relative to the supply direction of a paperboard sheet, for cutting the sheet; slitter width-direction moving means 90, 112, 104, 84, 114, and 16 for respectively independently moving the plurality of slitters in the width direction of the sheet; and a control means for selecting a utilized slitter from among the plurality of slitters based on a production order, calculating a width-direction correction amount relative to an initial position based on the desired paperboard sheet width-direction dimension according to the amount of shearing by the slitter knife, and controlling the slitter width-direction moving means so as to position the slitter knives at a position based on that calculated correction amount.

Claims

1. A slitter scorer apparatus for cutting a paperboard sheet continuously supplied along a supply line and scoring the surface thereof, comprising:

a plurality of scorers parallely arrayed in the width direction relative to the paperboard sheet supply direction, for scoring the surface of a paperboard sheet;

a plurality of slitters parallely arrayed in the width direction relative to the paperboard sheet supply direction, having slitter knives for cutting the paperboard sheet;

a scorer width-direction moving means for independently moving each of the plurality of scorers in the width direction of the paperboard sheet;

a slitter width-direction moving means for independently moving each of the plurality of slitters in the width direction of the paperboard sheet;

and a control means for selecting a utilized slitter from among the plurality of slitters based on a production order, calculating a width-direction positional correction amount of the slitter knives of the selected slitter relative to an initial position matched to the desired paperboard sheet dimension in the width direction in accordance with the amount of shearing by the slitter knives, and controlling the slitter width-direction moving means to position the slitter knives at a position based on that calculated correction amount.

2. The slitter-scorer apparatus of claim 1, wherein the control means further controls the scorer width-direction moving means by selecting a utilized scorer from among the plurality of scorers based on a production order, calculating a scorer correction amount relative to an initial position matched to the desired paperboard sheet scoring position according to the above-described slitter knife width-direction positional correction amount, and positioning the scorer at a position based on that calculated correction amount.

3. The slitter-scorer apparatus of claim 2, wherein the control means calculates sequentially from one side in the width dimension of the slitter-scorer apparatus a first utilized scorer correction amount, and calculates sequentially from the other width dimension side of the slitter-scorer apparatus a second utilized scorer correction amount, then corrects those calculated first and second correction amounts so as to match the utilized scorer and the utilized slitter to the mechanical center, thereby calculating a slitter knife width direction position correction amount and scorer correction amount based on the amount of shearing by the slitter knives.

4. The slitter-scorer apparatus of claim 2, wherein the control means controls a slitter width-direction moving means and scorer width-direction moving means so as to simultaneously position the utilized slitter knives and the utilized scorers.

5. The slitter scorer apparatus of claim 1, further comprising a warpage detection sensor for detecting the amount of paperboard sheet warpage,

wherein the control means further corrects the amount of positional correction in the width direction of the slitter knives based on the amount of shearing by the slitter knives in accordance with the amount of warpage of the paperboard sheet detected by the warpage amount detection sensor.

6. A method for controlling the positional correction of slitter knives and scorers in a slitter scorer apparatus, comprising:

a plurality of slitters having slitter knives for cutting a sheet parallely arrayed so as to be independently movable in the width direction relative to the direction of supply of the paperboard sheet; and

a plurality of scorers for scoring the surface of a sheet parallely arrayed so as to be independently movable in the width direction relative to the direction of supply of the paperboard sheet;

said method comprising the steps of;

selecting utilized slitters and utilized scorers from among the plurality of slitters and scorers based a production order;

calculating a first correction amount for each of the utilized scorers based on the amount of shearing by the slitter knives sequentially from one side in the width direction of the slitter scorer apparatus;

calculating a second correction amount for each of the utilized slitter knives based on the amount of shearing by the slitter knives sequentially from the other side in the width direction of the slitter scorer apparatus;

correcting the calculated first and second correction amounts to align the utilized scorers and the utilized slitter knives to the mechanical center, and calculating slitter knife correction amount and scorer correction amount relative to an initial position based on the desired dimension in the paperboard sheet width direction;

positioning the utilized slitters and the utilized scorers at a position based on that calculated correction amounts.