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
  • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
  • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
  • B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
• • 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
  • B26D1/12—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 a cutting member moving about an axis
  • B26D1/25—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 a cutting member moving about an axis with a non-circular cutting member
  • B26D1/34—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
  • B26D1/36—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and rotating continuously in one direction during cutting, e.g. mounted on a rotary cylinder
  • B26D1/365—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and rotating continuously in one direction during cutting, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips 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
  • 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
  • B26D1/12—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 a cutting member moving about an axis
  • B26D1/25—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 a cutting member moving about an axis with a non-circular cutting member
  • B26D1/34—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
  • B26D1/40—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
  • B26D1/405—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips 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
  • 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
  • B26D1/12—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 a cutting member moving about an axis
  • B26D1/25—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 a cutting member moving about an axis with a non-circular cutting member
  • B26D1/34—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
  • B26D1/42—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and slidably mounted in a rotary member
  • B26D1/425—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 a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and slidably mounted in a rotary member for thin material, e.g. for sheets, strips 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
  • 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
  • B26D1/56—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter
  • B26D1/62—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
  • B26D1/626—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips 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
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
  • B26D7/14—Means for treating work or cutting member to facilitate cutting by tensioning the work
• • 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
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/20—Cutting beds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
  • B26F3/00—Severing by means other than cutting; Apparatus therefor
  • B26F3/02—Tearing
• • 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
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/20—Cutting beds
  • B26D2007/202—Rollers or cylinders being pivoted during operation

Definitions

• the present invention relates to a cross-cutting apparatus for a web-like mate- rial, such as a pulp or paper web, as well as to a cross-cutting method. Furthermore, the invention relates to a sheet cutting unit.
• An object of the present invention is to provide an enhanced cross-cutting apparatus for a pulp web, which will also be simpler and more effective than currently available equipment in terms of its operation and maintenance.
• the basic conception in an apparatus and method of the invention is that it comprises means for maintaining a web tension at a cutting point as well as a blade assembly capable of piercing a web for cutting the same.
• said web-supporting assembly (2) includes at least one arrangement (6) for allowing the piercing action of the blade element (5) to extend through the web (4) in such a way that it is simultaneously supported in the vicinity of a piercing area.
• the apparatus comprises two pairs of web- tensioning rotating rolls spaced from each other in the web running direction, as well as there between a pair of rotating cross-cutting rolls, the web being guided through said pairs of rolls, and that one of the cutting rolls is provided with at least one web-piercing blade element extending from the circumferential roll surface and one of the web-supporting rolls has its circumferential surface provided with at least one groove or slot in cooperation with said blade element.
• the upstream pair of drawing rolls has a speed of rotation which is lower than that of the downstream pair of drawing rolls.
• An apparatus of the invention is based on the piercing of a web, not cutting it.
• a requirement for piercing is that the web be tensioned at the point of piercing for driving the piercing blade easily into and through the web.
• the apparatus of the invention is less noisy and, furthermore, the apparatus can be designed by using lighter, thin-walled rolls or cylinders.
• the blade element or elements are included in an upper cutting roll and the groove or grooves respectively in a lower cutting roll.
• the construction of rolls used in a recommended embodiment can be designed in such a way that the web-supporting frame of a cutting roll is provided with circumferential grooves and, respectively, the circumferential surface of a roll thereabove is provided with piercing blades matching the grooves.
• the counter-roll can be provided with a corresponding number of grooves or a single groove, a speed difference between the rolls being used for bringing the piercing blade to always find a groove present on the frame.
• the above-described continuously rotating roll can also be replaced by using a linkage performing a reciprocating action.
• This type of solution can be implemented e.g. in such a way that on one side of a web (either above or below) is a continuously rotating roll provided with a piercing blade and a piercing slot is included in a linkage functioning as a counterpart for the roll and having an arched top surface which is provided with a crosswise slot over the length of the piercing blade, which is able to receive the blade in a pierce-cut operation.
• the linkage may operate in such a manner that the blade of roll of a rotating blade roll "drives" the linkage.
• a blade bar can also be constructed by using a similar linkage, whereby both the blade bar and a counter-bar take the form of recipro- eating linkages.
• the invention relates also to a method for the continuous-action cutting of a web-like material, such as a web of pulp or the like.
• This method is characterized in that the web is maintained in a tensioned condition and pierced crosswise of the web with a blade element in one or more operations at the same point of the web, and that the web is supported during the piercing process at the point of piercing in such a way that the blade element is able to penetrate through the web essentially throughout its cross machine direction.
• the tension of a web is maintained in such a way that the pierc- ing blade does not alter the main running direction of the web.
• the invention relates to a continuous working sheet cutter unit in a pulp-drying machine, comprising at least
• slitter mechanism for a pulp web for cutting it in a number of laterally adjusted slitting devices into separate longitudinal webs
• bale table or the like for stacking the sheets thereon to produce bales.
• This sheet cutter unit is characterized in that the cross-cutting device, in which the separate webs are cut into sheets, comprises at least - a web-supporting assembly on one side of the web,
• the web-supporting assembly comprising an arrangement for allowing a piercing action of the blade element to extend through the web while simultaneously supporting it in the operative vicinity of a piercing location
• fig. 1 shows an apparatus of the invention in one embodiment
• figs. 2 and 3 show a second preferred embodiment of the invention
• fig. 4 shows a further embodiment of the invention, wherein one of the blades is retractable
• fig. 5 shows a solution of the invention, wherein the cutting of a web is per- formed in two separate operations
• figs. 6 and 7 show details of fig. 5 embodiment
• fig. 8 shows a sheet cutter unit of the invention.
• the apparatus of the invention is based on the fact that a web is not cut with a blade, but a web is pierced, the requirement of which is that the web is tensioned at the moment and area of piercing.
• Fig. 1 depicts a fundamental solution for such an apparatus of the invention.
• a second pair of rolls 2 wherein the upper roll has its outer frame provided with a piercing blade 5 extending from the frame.
• the lower roll 2, which supports the web 4 is provided with a cir- cumferential recess 6 which is in cooperation with the piercing blade 5 of the upper roll in such a way that, as the upper roll is rotating, the piercing means 5 and the recess 6 coincide with each other at the web, the piercing means 5 penetrating into the web and piercing the same.
• Fig. 1 illustrates just one piercing means 5, but the number can be increased as the case may be, the practical number of blades being 1-4 as illustrated in fig. 4.
• the lower roll 2 can be provided with an equivalent number of counter-grooves 6 for the piercing means 5.
• Figs. 2 and 3 illustrate an embodiment of the invention, wherein a web passes through between a roll provided with a blade 5 and a back-up element 11 set therebelow and provided with a web-supporting bearing surface.
• the bearing surface is not constituted by a roll but, instead, by the link-shaped back-up element 11 , having its peripheral surface provided with a groove 6 in cooperation with the blade 5.
• the back-up element 11 is hinged to a support assembly and operates reciprocally along a path defined by two limiters 12.
• the back-up element 11 is in its start position against a left-hand cushion member 12 , in which position the overhead blade 5 coincides with the groove 6 present in the bearing surface upon pressing through a web 4.
• the back-up element 11 turns along with the blade 5 and is released therefrom, as shown in fig. 3, as the back-up element comes into contact with the right-hand limiter 12. In this position, a spring 13 pulls the back-up element 11 back to the start position.
• the link-shaped back-up element 11 operates continuously, being driven by the rotating overhead roll. It is also possible that such a linkage can be operated mechanically.
• Fig. 4 depicts one embodiment in reference to four crosswise blades.
• One of the full-width blades 5 is positioned in a groove-like recess, having such a depth that the blade 5 can be fully retracted within the recess.
• the blade 5 is adapted to be movable in and out in contact with guide surfaces.
• the actuator is constituted by a number of electrically controlled solenoids 25, capable of retracting the blade even while the machine is run- ning, if this is desirable.
• the loading is effected for example by means of a spring, which normally maintains the blade extended as the web is pierced.
• the actuator, such as the solenoids 25, is sufficiently powerful for retracting the blade against the spring load.
• the blades are typically maintained extended but, in special circumstances, the solution of the invention can be readily switched for running sheets of a different size, such as bale wrapping sheets.
• the actuator By way of a transfer path extending through a shaft the actuator (actuators) is connected to a control unit for controlling the position of blades.
• Figs. 5-7 illustrate an embodiment of the invention, wherein a web is cross-cut in several sequences. This is shown schematically in fig. 5.
• Fig. 6 shows the point of piercing in a view transversal to the running direction of a web 4.
• the apparatus is provided with a back-up plate 7 for the web 4.
• the back-up plate 7 constitutes an opening or a recess 6 at the point of pierc- ing, wherein a web-supporting roll 2 is able to make a contact with the web.
• the roll 2 is provided with circumferentially extending grooves 10, which correspond to the transversal groove 6 in the surface of the roll 2 shown in fig. 1.
• the circumferentially extending grooves are parallel to each other and correspond in number to the number of piercing blades 5 included in the overhead roll.
• the piercing blades can be positioned in a number of rows spaced from each other in the running direction of the web.
• the embodiment shown in figs. 5-7 includes blade arrays 5, 50 which are set in two successive rows (fig. 5) in line with the longitudinal axis of the overhead roll. In line with the blades 5, 50 and below the web 4 there are back-up rolls 2, 20, respectively.
• the blade position can be adjusted by means of an adjustment and fastening screw 9 extending through a slot 8. Likewise, the blade is quite easy to replace. 8
• the blade wears very little and, thus, it is very seldom that the blade must be replaced.
• Fig. 7 illustrates the embodiment of fig. 6 as seen in the web running direction.
• Fig. 7 depicts a slotted design of the lower roll and the positioning of the piercing blades 5, 50 in line with grooves 10 extending around the circumference thereof.
• the number of blades can be 1-4.
• the continuous sheet cutter unit of the invention used in a pulp-drying ma- chine and shown schematically in fig. 8, comprises a tail feed device 14 for a pulp web 4, which is preferably mounted in connection with the cutter unit and to which the web is delivered from a dryer section. Normally the web merely runs past the tail feed device, which is not needed except in a feed situation. Subsequently, in a cutter unit of the invention, the web 4 is advanced to a slitter assembly 15 for slitting the same with a number of laterally mounted slitting devices into separate longitudinal webs. The slitting width is determined according to what is desirable in a particular type of slitting.
• the separate webs are carried further to a pair of drawing rolls 1 , which maintains over a dryer section a desired web tension and draws the web (at this point, slit separate webs).
• a pair of drawing rolls 1 which maintains over a dryer section a desired web tension and draws the web (at this point, slit separate webs).
• the longitudinally slit separate webs are fed to a cross-cutting piercing device 2 of the invention for cutting the separate webs into sheets by piercing in accordance with the invention.
• the cross-cutting piercing device of the invention for cutting separate webs into sheets comprises at least a web-supporting assembly 2 on one side of a web 4, a web-piercing blade element 5 on the essentially opposite side thereof, said web-supporting assembly 2 comprising an arrangement 6 for allowing a piercing action of the blade element to extend through the web 4 while supporting the same in the functional vicinity of the piercing area, as well as a mecha- nism 20 for adjusting/setting the web to a predetermined tension at the moment of cutting the web.
• downstream of the piercing-cutting unit 2 is a second pair of drawing rolls 3 for maintaining a desired tension in the cross-cutting apparatus as well as for guiding cut sheets 16 further, if necessary in an overlapping fashion, onto a bale table, whereby it is also possible to use a separate set of drawing rolls 17 for overlapping.
• a reject gate/gates 19 in connection with the pair of drawing rolls 3 are closed, the sheets 16 runs forward in the process over a normal path to the support rolls of a sheet conveyor and further onto a bale table 18.
• the continuous sheet cutter unit of the invention used in a pulp-drying machine is capable of eliminating several drawbacks existing in the prior art architecture.
• the use of a sheet cutter unit of the invention entails, for example, that it is not necessary to build a complicated temperature stabilizing unit for the counter- blade, which means savings in terms of space, energy, as well as investment costs.
• the sheet cutter unit of the invention is also significantly less noisy than the prior art solutions. There is more freedom in designing a sheet cutter unit of the invention, as it does not require a downward path run to the cutter, which is the case in the prior art solution.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Paper (AREA)
• Nonmetal Cutting Devices (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Advancing Webs (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8551663

Family Applications (1)

Country Status (8)

Cited By (8)

Families Citing this family (2)

Citations (10)

Family Cites Families (2)

• 1998
  • 1998-05-06 FI FI981001A patent/FI103663B/fi not_active IP Right Cessation
• 1999
  • 1999-04-01 WO PCT/FI1999/000271 patent/WO1999057050A1/en active IP Right Grant
  • 1999-04-01 DE DE19983176T patent/DE19983176T1/de not_active Withdrawn
  • 1999-04-01 CA CA002331397A patent/CA2331397A1/en not_active Abandoned
  • 1999-04-01 AU AU31498/99A patent/AU3149899A/en not_active Abandoned
  • 1999-04-01 ES ES200050069A patent/ES2199622B2/es not_active Expired - Fee Related
  • 1999-04-01 AT AT0903299A patent/AT501246B1/de not_active IP Right Cessation
• 2000
  • 2000-10-25 SE SE0003860A patent/SE520121C2/sv not_active IP Right Cessation

Patent Citations (10)

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