WO1997031761A1 - Cutter arrangement - Google Patents

Cutter arrangement Download PDF

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Publication number
WO1997031761A1
WO1997031761A1 PCT/SE1997/000280 SE9700280W WO9731761A1 WO 1997031761 A1 WO1997031761 A1 WO 1997031761A1 SE 9700280 W SE9700280 W SE 9700280W WO 9731761 A1 WO9731761 A1 WO 9731761A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
cutter
holder
movement
adjustment
Prior art date
Application number
PCT/SE1997/000280
Other languages
French (fr)
Inventor
Jan-Olof Fransson
Jan Nilsson
Original Assignee
Norden Pac Development Ab
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 Norden Pac Development Ab filed Critical Norden Pac Development Ab
Priority to DE69700877T priority Critical patent/DE69700877T2/en
Priority to AU21081/97A priority patent/AU2108197A/en
Priority to BR9708155A priority patent/BR9708155A/en
Priority to EP97906367A priority patent/EP0883470B1/en
Priority to JP53085697A priority patent/JP3959115B2/en
Priority to US09/117,766 priority patent/US6116134A/en
Publication of WO1997031761A1 publication Critical patent/WO1997031761A1/en

Links

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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8798—With simple oscillating motion only
    • Y10T83/8799—Plural tool pairs
    • Y10T83/8801—Plural tools on single oscillating arm [i.e., tool holder]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9461—Resiliently biased connection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9473—For rectilinearly reciprocating tool
    • Y10T83/9478—Tool is single element reciprocable generally perpendicularly to elongate cutting edge [e.g., shear, etc.]

Definitions

  • the invention relates to a cutter arrangement, in particular for trimming sealed packaging-tube ends.
  • Cutting tools for such trimming are used in tube filling machines where the tubes are processed in an in-line procedure, i.e. empty tubes provided with a closure are set into a holder in the machine, the tubes are indexed to a filling station where the tubes are filled with product via their open ends and then closed in order to be finally fed out in the form of filled tubes.
  • the problem underlying the invention is to allow self- adjustment of the cutting tool whilst maintaining precision, as well as allowing re-adjustment as soon as the self-adjustment is no longer sufficient.
  • the invention thus provides a cutter arrangement, preferably for trimming sealed packaging-tube ends, comprising means for producing a forward and return movement for at least one pair of cooperating cutting blades in a machine support, as well as a holder for said cutting blades, whereby the holder and said movement- producing means are arranged so that the cutting edges of the cutting blades meet in a parallel movement.
  • the cutter arrangement is notable in that at least one of said cutting blades is supported by a sprung holder.
  • means are arranged for adjusting the holder in a direction which is at right angles to the plane of parallel movement.
  • the holder defines a sub-zone between a pair of material-weakening channels on either side of a central plane through the cutting blade, and the cutting blade is supported entirely within said sub-zone.
  • Each channel suitably comprises two part-channels which are open on respective sides of the holder plate and which extend over the whole width of the plate as seen in the direction of parallel movement, and between said sides, and which between them define material bridges for forming elongation zones.
  • an adjustment screw is arranged with means for displacing the material bridges and the sub-zone in said adjustment direction.
  • the adjustment screw is suitably conical and is positioned in a plane parallel to the plane of parallel movement in one of said part-channels.
  • the channels in the holder plate are produced by means of spark-machining the holder plate.
  • Fig. 1 schematically shows a cutter arrangement according to the invention, intended to be mounted in a tube filling machine
  • Fig. 2 shows, in schematic cross-section, the sprung cutter arrangement or the cutting blade according to the invention
  • Fig. 3 shows, on an enlarged scale, the encircled area in Fig. 2,
  • Fig. 4 shows the principle of parallel movement of the opposed cutting edges
  • Fig. 5 shows a packaging-tube end trimmed with the cutter arrangement of Fig. 2,
  • Fig. 6 is a cross-section along line VI-VI in Fig. 2 which shows the extent of the cutter holder plate in the direction of parallel movement.
  • reference numeral 10 denotes a support part intended to be mounted on the tube filling machine in the trimming station.
  • a linear control 11 is arranged in conjunction with part 10, and moving supports (carriages) 13, 14 are mounted on the linear control 11 via linkage arms 15, 16.
  • the link arms are manoeuvred via additional links 17, 18 for rotation around shafts 19, 20, and at the ends of the link arms 15, 16 these engage with dogs 21, 22 on the moving supports 13, 14.
  • the moving supports are carried on a track 12.
  • a holder 26 for a counter-blade 23 which, in the present embodiment, is removably supported but not sprung in the holder 26.
  • a cutting blade 24 is supported in the holder 25 and, as can be seen in Fig. 4, the two cutting blades 23, 24 perform a parallel movement with opposing cutting edges.
  • Figure 2 shows schematically in cross-section how a pair of cutting blades 24 are supported by a holder plate 25 of the moving support 14.
  • the cutter arrangement in figure 2 is intended to achieve a trimming (clean cut) of two tube ends in the trimming station, said tube ends having been fed forwards with the aid of indexable pairs of tube holders of the tube filling machine.
  • the cutter holder plate 25 comprises, seen in accordance with Fig. 2, three vertically-extending webs, one of which is centrally placed and the remaining two being at respective ends of the plate.
  • the pair of cutting blades 24 is fixed to the plate 25 by means of bolts applied through holes extending in a central plane through respective cutting blades 24.
  • the horizontal part of the holder plate 25 in figure 2 presents four sets of material-weakening channels 27, 27' placed at the outer ends of the cutting blades in the lateral direction in Fig. 2, so that the cutting blades lie completely within respective pairs of channels which are open on the cutting blade side of the holder plate.
  • FIG. 3 shows more clearly how the channels 27, 27' are arranged.
  • the channel 27 is open at the upper side 29 of the holder plate 25 and extends over the whole width of the holder plate as seen in a plane parallel to the plane of parallel movement.
  • the other channel 27' is open at the opposite side 30 of the holder plate and also has the same dimension as seen in a plane parallel to the plane of parallel movement.
  • the channels 27, 27' in figure 3 have horizontally and vertically extending parts, these being positioned so that narrow material bridges are formed between the channels 27, 27' and between the upper side 29 and the underside 30 of the holder plate, so as to form elongation zones ("stretching" zones) .
  • channel 27 in this embodiment there is an eccentric screw 28 for re-adjustment of the position of the cutting blade holder plate's cutting blade supporting surface 29.
  • the channels 27, 27' are suitably constructed with the aid of spark-machining and can thereby be given complicated dimensions in order to provide the best possible elongation characteristics and self-adjustment characteristics respectively.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Details Of Cutting Devices (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Shearing Machines (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

Cutter arrangement for trimming sealed packaging-tube ends. The arrangement comprises a pair of cutter blades, wherein at least one of said cutter blades is sprung and self-adjustably carried on a holder plate. A conical screw arrangement is provided for re-adjustement when the self-adjustment is no longer sufficient.

Description

TITLE: Cutter arrangement
The invention relates to a cutter arrangement, in particular for trimming sealed packaging-tube ends.
Cutting tools for such trimming are used in tube filling machines where the tubes are processed in an in-line procedure, i.e. empty tubes provided with a closure are set into a holder in the machine, the tubes are indexed to a filling station where the tubes are filled with product via their open ends and then closed in order to be finally fed out in the form of filled tubes.
Apart from the mentioned process steps, there are normally also additional steps in the form of checking operations, marking stations and trimming (i.e. clean-cutting) of the seal which provides the closed end after filling.
Present machines operate at a high production speed, which requires precision in the various processing stations.
It has shown itself to be the case that certain tube materials, typically in laminate form, comprise layers which cause a great deal of wear on the cutting tools or the cutting edges. This wear is possibly due to the presence of silicon oxide in the material.
The problem underlying the invention is to allow self- adjustment of the cutting tool whilst maintaining precision, as well as allowing re-adjustment as soon as the self-adjustment is no longer sufficient.
The invention thus provides a cutter arrangement, preferably for trimming sealed packaging-tube ends, comprising means for producing a forward and return movement for at least one pair of cooperating cutting blades in a machine support, as well as a holder for said cutting blades, whereby the holder and said movement- producing means are arranged so that the cutting edges of the cutting blades meet in a parallel movement.
The cutter arrangement is notable in that at least one of said cutting blades is supported by a sprung holder.
In order to achieve said re-adjustment, means are arranged for adjusting the holder in a direction which is at right angles to the plane of parallel movement.
In a preferred embodiment, the holder defines a sub-zone between a pair of material-weakening channels on either side of a central plane through the cutting blade, and the cutting blade is supported entirely within said sub-zone.
Each channel suitably comprises two part-channels which are open on respective sides of the holder plate and which extend over the whole width of the plate as seen in the direction of parallel movement, and between said sides, and which between them define material bridges for forming elongation zones.
In order to achieve a re-adjustment, an adjustment screw is arranged with means for displacing the material bridges and the sub-zone in said adjustment direction.
The adjustment screw is suitably conical and is positioned in a plane parallel to the plane of parallel movement in one of said part-channels.
The channels in the holder plate are produced by means of spark-machining the holder plate. DESCRIPTION OF THE FIGURES:
An embodiment of the invention will now be described with reference to the accompanying drawings, in which:
Fig. 1 schematically shows a cutter arrangement according to the invention, intended to be mounted in a tube filling machine,
Fig. 2 shows, in schematic cross-section, the sprung cutter arrangement or the cutting blade according to the invention,
Fig. 3 shows, on an enlarged scale, the encircled area in Fig. 2,
Fig. 4 shows the principle of parallel movement of the opposed cutting edges,
Fig. 5 shows a packaging-tube end trimmed with the cutter arrangement of Fig. 2,
Fig. 6 is a cross-section along line VI-VI in Fig. 2 which shows the extent of the cutter holder plate in the direction of parallel movement.
In Fig. 1, reference numeral 10 denotes a support part intended to be mounted on the tube filling machine in the trimming station. A linear control 11 is arranged in conjunction with part 10, and moving supports (carriages) 13, 14 are mounted on the linear control 11 via linkage arms 15, 16. The link arms are manoeuvred via additional links 17, 18 for rotation around shafts 19, 20, and at the ends of the link arms 15, 16 these engage with dogs 21, 22 on the moving supports 13, 14. The moving supports are carried on a track 12.
On the moving support 13, there is a holder 26 for a counter-blade 23 which, in the present embodiment, is removably supported but not sprung in the holder 26.
A cutting blade 24 is supported in the holder 25 and, as can be seen in Fig. 4, the two cutting blades 23, 24 perform a parallel movement with opposing cutting edges.
Figure 2 shows schematically in cross-section how a pair of cutting blades 24 are supported by a holder plate 25 of the moving support 14. The cutter arrangement in figure 2 is intended to achieve a trimming (clean cut) of two tube ends in the trimming station, said tube ends having been fed forwards with the aid of indexable pairs of tube holders of the tube filling machine.
The cutter holder plate 25 comprises, seen in accordance with Fig. 2, three vertically-extending webs, one of which is centrally placed and the remaining two being at respective ends of the plate. The pair of cutting blades 24 is fixed to the plate 25 by means of bolts applied through holes extending in a central plane through respective cutting blades 24.
The horizontal part of the holder plate 25 in figure 2 presents four sets of material-weakening channels 27, 27' placed at the outer ends of the cutting blades in the lateral direction in Fig. 2, so that the cutting blades lie completely within respective pairs of channels which are open on the cutting blade side of the holder plate.
In this way a pair of sub-zones 25', 26' are formed, each of which carries one cutting blade 24. Figure 3 shows more clearly how the channels 27, 27' are arranged. The channel 27 is open at the upper side 29 of the holder plate 25 and extends over the whole width of the holder plate as seen in a plane parallel to the plane of parallel movement.
The other channel 27' is open at the opposite side 30 of the holder plate and also has the same dimension as seen in a plane parallel to the plane of parallel movement.
The channels 27, 27' in figure 3 have horizontally and vertically extending parts, these being positioned so that narrow material bridges are formed between the channels 27, 27' and between the upper side 29 and the underside 30 of the holder plate, so as to form elongation zones ("stretching" zones) .
In one of the channels, channel 27 in this embodiment, there is an eccentric screw 28 for re-adjustment of the position of the cutting blade holder plate's cutting blade supporting surface 29.
, The preliminary adjustment of the opposed cutting edges (Fig. 4) is made so that a spring effect from the material bridges between the channels 27, 27' will occur, i.e. a certain upwardly-directed force is exerted from the sprung, material-weakened parts provided with channels in the part of the movement when the cutting blades or cutting edges meet in accordance with Fig. 4. By applying this force, the blades will come into contact with each other correctly even after a certain amount of wear.
When however the wear has reached such proportions that the available upwardly-directed extent of movement from the parts 25', 26' of the holder plate is no longer sufficient, a re-adjustment is necessary. Such adjustment is performed with the adjustment screws 28 which, in the shown embodiment, are conical and provide lift to the surface 29 to a new self-adjusting level within certain limits.
The channels 27, 27' are suitably constructed with the aid of spark-machining and can thereby be given complicated dimensions in order to provide the best possible elongation characteristics and self-adjustment characteristics respectively.
Although only one specific embodiment of the invention has been described, it should be understood that modifications and alternatives are possible within the scope of the appended claims.

Claims

1. Cutter arrangement, preferably for trimming sealed packaging-tube ends, comprising means (17), (18); (16), (15); (13), (14) for producing a forward and return movement of at least one pair of cooperating cutting blades (23), (24) and holders (25), (26) for said cutting blades, in a machine support (10), whereby the holders and said movement-producing means are arranged so that the cutting edges (23), (24) of the cutter blades meet in a parallel movement, characterized in that at least one of said cutting blades (24) is supported by a sprung holder (25), and in that means are arranged for re-adjustment of the holder in a direction which is at right-angles to the plane of parallel movement.
2. Cutter arrangement according to claim 1, characterized in that the holder (25) defines a sub-zone (25'; 26') between a pair of material-weakening channels (27, 27') on either side of a central plane through the cutting blade (24), and in that the cutting blade is supported entirely within said sub-zone.
3. Cutter according to claim 2, characterized in that each channel comprises two part- channels (27, 27') which are open on either side (29, 30) of the holder plate and extend over the whole width of the plate as seen in the direction of parallel movement, and in that material bridges are defined between said sides and between the part-channels, said material bridges forming elongation zones.
4. Cutter according to claim 3, characterized in that each channel section is provided with an adjustment screw (28) with means for producing a displacement of the material bridges and the sub-zone in said adjustment direction.
5. Cutter arrangement according to claim 4, characterized in that the adjustment screw is conical and is positioned in a plane parallel to the plane of movement in one of said part-channels.
6. Cutter arrangement according to any one of claims 2-5, characterized in that the channels are produced by spark-machining.
PCT/SE1997/000280 1996-03-01 1997-02-20 Cutter arrangement WO1997031761A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE69700877T DE69700877T2 (en) 1996-03-01 1997-02-20 CUTTING ARRANGEMENT
AU21081/97A AU2108197A (en) 1996-03-01 1997-02-20 Cutter arrangement
BR9708155A BR9708155A (en) 1996-03-01 1997-02-20 Cutter installation
EP97906367A EP0883470B1 (en) 1996-03-01 1997-02-20 Cutter arrangement
JP53085697A JP3959115B2 (en) 1996-03-01 1997-02-20 Cutter composition
US09/117,766 US6116134A (en) 1996-03-01 1997-02-20 Cutter arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9600806-5 1996-03-01
SE9600806A SE509853C2 (en) 1996-03-01 1996-03-01 Adjustable knife assembly

Publications (1)

Publication Number Publication Date
WO1997031761A1 true WO1997031761A1 (en) 1997-09-04

Family

ID=20401627

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/000280 WO1997031761A1 (en) 1996-03-01 1997-02-20 Cutter arrangement

Country Status (10)

Country Link
US (1) US6116134A (en)
EP (1) EP0883470B1 (en)
JP (1) JP3959115B2 (en)
CN (1) CN1074706C (en)
AU (1) AU2108197A (en)
BR (1) BR9708155A (en)
DE (1) DE69700877T2 (en)
ES (1) ES2141601T3 (en)
SE (1) SE509853C2 (en)
WO (1) WO1997031761A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499370A (en) * 1968-03-11 1970-03-10 Langston & Co Tab cutter
US4412467A (en) * 1981-09-14 1983-11-01 Lehigh Steck Warlick Cylinder-mounted cutter
EP0318174A2 (en) * 1987-11-16 1989-05-31 Scheffer, Inc. Rotary cutter apparatus
GB2248577A (en) * 1990-10-12 1992-04-15 Lo Kun Nan Paper-shearing device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1065882A (en) * 1913-02-01 1913-06-24 William F Lockwood Bagging-machine.
US2107581A (en) * 1932-10-31 1938-02-08 John H Parsons Tool retainer
US3063321A (en) * 1957-10-03 1962-11-13 Duerkoppwerke Cloth cutting apparatus
US3527123A (en) * 1968-03-25 1970-09-08 Dovey Mfg Co Method and apparatus for assembling blades onto a blade support
US4531439A (en) * 1983-06-16 1985-07-30 Raymond L. Valente Metal working apparatus
US4848202A (en) * 1987-10-29 1989-07-18 The Hamilton Tool Company Cut off or cross perforator or scoring cylinder with quick blade release
US4872384A (en) * 1988-01-29 1989-10-10 Borzym John J Tube cutting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499370A (en) * 1968-03-11 1970-03-10 Langston & Co Tab cutter
US4412467A (en) * 1981-09-14 1983-11-01 Lehigh Steck Warlick Cylinder-mounted cutter
EP0318174A2 (en) * 1987-11-16 1989-05-31 Scheffer, Inc. Rotary cutter apparatus
GB2248577A (en) * 1990-10-12 1992-04-15 Lo Kun Nan Paper-shearing device

Also Published As

Publication number Publication date
JP3959115B2 (en) 2007-08-15
SE509853C2 (en) 1999-03-15
SE9600806D0 (en) 1996-03-01
SE9600806L (en) 1997-09-02
EP0883470B1 (en) 1999-12-01
CN1074706C (en) 2001-11-14
DE69700877D1 (en) 2000-01-05
AU2108197A (en) 1997-09-16
DE69700877T2 (en) 2000-07-20
US6116134A (en) 2000-09-12
JP2000505364A (en) 2000-05-09
ES2141601T3 (en) 2000-03-16
EP0883470A1 (en) 1998-12-16
CN1212648A (en) 1999-03-31
BR9708155A (en) 1999-07-27

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