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US3405582A - Cutting mechanism for thin, elongate structures - Google Patents

Cutting mechanism for thin, elongate structures Download PDF

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Publication number
US3405582A
US3405582A US538320A US53832066A US3405582A US 3405582 A US3405582 A US 3405582A US 538320 A US538320 A US 538320A US 53832066 A US53832066 A US 53832066A US 3405582 A US3405582 A US 3405582A
Authority
US
United States
Prior art keywords
cutting
countersurface
knife
yarn
cutting mechanism
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
US538320A
Other languages
English (en)
Inventor
Eichenberger Werner
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.)
Loepfe AG Gebrueder
Original Assignee
Loepfe AG Gebrueder
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 Loepfe AG Gebrueder filed Critical Loepfe AG Gebrueder
Application granted granted Critical
Publication of US3405582A publication Critical patent/US3405582A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/71—Arrangements for severing filamentary materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • 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
    • Y10T83/8752—Tool moves work to and against cooperating tool
    • Y10T83/8755—One tool resiliently mounted or biased
    • 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
    • Y10T83/8765—Magnet- or solenoid-actuated tool
    • 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
    • Y10T83/8765—Magnet- or solenoid-actuated tool
    • Y10T83/8768—Solenoid core is tool or tool support
    • 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
    • Y10T83/8776—Constantly urged tool or tool support [e.g., spring biased]
    • Y10T83/8785—Through return [noncutting] stroke
    • 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
    • Y10T83/9411—Cutting couple type

Definitions

  • a quick-operating cutting device for yarns, wires and the like, especially for use in yarn cleaners wherein the cutting device comprises a knife having a dull cutting edge, a flat movable countersurface for the knife and a quick-operating drive means for the flat movable countersurface.
  • the knife is pivotally mounted such that the dull cutting edge faces the flat countersurface.
  • the quickoperating drive means for the fiat countersurface preferably comprises an electromagnetic mechanism and serves to move the flat countersurface in a direction perpendicular to the surface thereof and towards the cutting edge of the knife.
  • the knife due to its pivotal mounting, adjusts itself upon contact with the countersurface to the momentary position of the countersurface thereby ensuring a proper cut and long life of the elements.
  • the present invention has reference to a new and improve-d cutting or severing mechanism for cutting thin, elongate structures by means of a cutting knife and a countersurface.
  • Such type cutting mechanisms are especially employed in textile machines for cutting a moving or stationary thread or yarn, for instance in a winding machine upon the occurrence of a yarn defect.
  • a further considerable disadvantage is that the known cutting device is not suitable for smooth synthetic yarn materials,
  • the synthetic yarn materials possess such a smooth surface that the latter is not engaged or pierced by the cutting edge and the yarn can move beneath such without being acted upon.
  • Another, more specific and noteworthy object of this invention is directed to the provision of a new and improved cutting mechanism for the faultless cutting of thin, elongate structures, especially fine as well as coarse threads, yarns or the like, formed of synthetic or natural material, and irrespective whether such are moving or at standstill.
  • Still a further important object of this invention pertains to the provision of an improved cutting mechanism for reliably and effectively cutting filamentous material, does not require a great deal of supervision, is robust in construction, positive in operation.
  • the inventive cutting mechanism for the cutting or severing of thin, elongate structures incorporates a cutting knife and a countersurface, the cutting knife possessing a blunt cutting end portion, and the cutting knife and countersurface are formed of hard metal.
  • the inventive cutting mechanism is particularly useful for cutting yarn or other filamentous material in textile machines.
  • the cutting knife and/or the countersurface are movable relative to one another in a plane perpendicular to the countersurface.
  • Such arrangement enables the best possible utilization of the energy of the displaceable component for carrying out an active cutting operation, meaning a cutting operation providing a short clean cut essentially crosswise of the thickness of the yarn or other structure, as opposed to a cutting operation which tears the material somewhat diagonally along its length.
  • the cutting knife and the countersurface are formed of such a hard material that upon impact of knife and countersurface, no permanent plastic deformation occurs. Therefore, there is obtained both longevity of the employed components and always an exact and clean parting or separation of the elongate structure to be cut.
  • the cutting knife of the inventive cutting mechanism is constructed as an oscillatory or pivotably mounted anvil, in other words, is a stationary component. It is therefore not necessary to manufacture and adjust the displaced components of the apparatus with any great precision, since the cutting knife can easily adjust itself to the momentary position of the countersurface.
  • a particularly advantageous physical construction of inventive cutting mechanism resides in moving the countersurface by means of a magnet, and the countersurface is arranged in such a manner that it is directly connected with the extension of the elongated armature of the magnet such that magnet, armature and countersupport are coaxially aligned. Due to this construction and arrangement of the drive for the countersurface, it is possible to make maximum use and transmission of the magnetic force.
  • the inventive cutting mechanism or apparatus is particularly suitable for cutting or severing thin, elongate structures of the most varied types, such as for instance threads, yarns, or filaments, of synthetic or natural materials, or thin wires.
  • a preferred application of the inventive cutting mechanism is for separation or cutting of yarns or the like in textile machines.
  • FIGURE 1 is a longitudinal sectional view of a first embodiment of inventive cutting mechanism utilizing an electromagnet wherein the countersurface is moved thereby and is coaxially arranged with regard to the magnet coil;
  • FIGURE 2 is a top plan view of the cutting mechanism depicted in FIGURE 1;
  • FIGURE 3 is a longitudinal sectional view, similar to FIGURE 1, but here showing a modified construction wherein the drive of the countersurface takes place via a rod arrangement;
  • FIGURE 4 is an enlarged, fragmentary view of the knife cutting portion having cutting faces ground at an angle of 90 with respect to one another;
  • FIGURE 5 is an enlarged, fragmentary view of a further form of cutting knife having main facets or bevelled faces ground at an angle of 90 to one another and actual cutting faces ground at an angle greater than 90;
  • FIGURE 6 is a diagram of an electrical circuit for operating either the cutting mechanism of FIGURE 1 or 3.
  • FIGURE 1 depicts an exemplary embodiment of inventive cutting mechanism or apparatus embodying a cutter or knife 1 and a countersurface 2.
  • This knife 1 is advantageously constructed as an anvil, i.e. does not carry out any linear displacement, yet is preferably mounted for rocking or oscillatory movement by a pin 3 at a support 4.
  • a stop or limit memher 5 retains the knife 1 in a slightly inclined position with respect to the countersurface 2.
  • This countersurface 2 for the cutter or knife 1 consists of a small plate fixedly connected with a carrier or support 6 of circular metallic material.
  • Carrier or support 6 is retained in a guide insert or member 7 coaxially with respect to the coil 8a of an electromagnet 8 and is provided at its end opposite the countersurface 2 with a piston 9 constructed as an armature for such electromagnet.
  • This piston or armature 9 is located essentially outside of the region of the coil 8a when it is in its rest position.
  • Carrier or support 6 which, in effect, is an extension of the armature 9, and the guide insert 7, are constructed such that an axial displacement of this armature or piston 9 through the distance X in the direction of the coil 8a is possible whenever this coil has current supplied to it by the conductors or leads 10 (FIGURE 2) and thereby attracts such armature 9.
  • Spring 11 returns the armature 9, thereby also the countersurface 2, back into its starting position when no current is flowing through the coil 8a of the magnet 8.
  • Carrier 6, guide insert 7 and coil 8a are arranged in a housing 12 which, like the support 4 for the knife or cutter 1, is secured to a base plate 13.
  • sealing member 14 is arranged between the guide insert 7 and the carrier or support 6 and which is preferably a rubber jacket or covering.
  • the carrier or support 6, together with the counter-surface 2 can also be located externally of the coil 8a of the magnet 8.
  • the carrier -6' is guided in the support members 17 and receives its driving force via a tiltable or rockable lever 19 operatively associated with the electromagnet 18 having a coil 8a.
  • a spring 11 acting upon an impact member 20 arranged at the carrier 6' returns the aforesaid carrier 6' carrying the countersurface 2 always back into the starting position.
  • the drive components for the cutting mechanism of FIGURE 3 are also arranged in a housing 12 and protected against contamination by dust or otherwise, by a seal means 14' preferably formed as a rubber jacket or casing.
  • FIGURES 4 and 5 depict different embodiments, in enlarged scale, of the cutter or knife unit.
  • a cutter or knife 1 of the construction depicted in FIG- URE 4 is employed and whose cutter end 10 has cutting surfaces or faces 21 and 22 ground at an angle of preferably with respect to one another.
  • the cutter portion 1a, of the knife could be made blunter, as such is shown by the cutter 1' of FIGURE 5.
  • the cutter end portion 1a only the main facets or bevelled faces 23- and 24 are at an angle of 90 with respect to one another, whereas the actual cutting flanks or faces 21 and 22 enclose an angle greater than 90.
  • the blunter the cutting portion the less its deformation and therefore its wear. Therefore, the cutter or knife of the inventive cutter mechanism has a blunt cutter end portion which can even have slightly rounded or curved cutting faces, and wherein the cutting faces enclose an angle with respect to one another of at least 45, and preferably at least 90.
  • a cutting operation is initiated by a current surge, for instance delivered by a control device.
  • This current surge produces an electromagnetic field in the coil 8a which attracts either the armature 9 or the tiltable lever 19, so that it carries out a jerky or rapid movement. Consequently, the countersurface 2 moves against the cutter or knife 1 or 1' and severs the structure lying between these elements.
  • the oscillatory or rockable mounting of this knife or cutter 1 or 1, as previously explained, ensures that in each instance the aforesaid knife and countersurface 2 compactly abut against one another. Therefore, the inventive cutting mechanism performs an active cutting operation resulting in an actual clean cut in contrast to the known device described at the outset of this disclosure.
  • cutter and countersurface are formed of very hard and tough material, as such are known to the art, e.g. hard steel, so that upon impacting one another the occurring deformation in each case is reversible, that is to say, takes place in the elastic range of the material. Consequently, it is possible to obtain a practically unlimited longevity of knife and countersurface.
  • the knife and countersurface possess a width (measured along the plane of the drawing of FIGURES 1 and 3) which is a multiple of the diameter of such thread or the like.
  • the width of the cutting edge and countersurface must be so large that the cutting mechanism can faultlessly engage the thread or yarn even then if such goes into transverse oscillations during passage through the cutting mechanism.
  • cutter and counter-surface were each made one centimeter wide.
  • FIGURE 6 The circuit depicted in FIGURE 6 has been found particularly advantageous for obtaining the relatively high energy, which is only required for short periods of time, from conventionally employed low-voltage current.
  • the circuit contains a transformer 25 which steps down the network voltage and delivers such to a full-wave rectifier 26.
  • This rectifier 26 feeds a storage capacitor 28 via a charging resistor 27.
  • a short duration control pulse 31 of two volts and sixty miliseconds duration arives from a yarn-supervising mechanism or monitoring device of a textile machine at the control transistor 30, then the latter becomes conductive for the corresponding short period of time, the relay 29 responds, and the current circuit is closed for the duration of such control pulse. Consequently, the storage capacitor 28 discharges and acts upon the electromagnet 8 or 18.
  • the contact 34 of the relay 29 there is coupled in parallel with such contact a series arrangement of resistor 32 and capacitor 33. Due to the described circuit there is only required about one-twentieth of the power of the lowvoltage current network in contrast to a direct connection.
  • the cutting mechanisms described in accordance with the previous exemplary embodiments are particularly suitable for cutting or severing thread, yarn or the like, irrespective whether natural or synthetic material is employed.
  • Experiments or trials have shown that it is possible to cut the finest yarns of Nm. 300 up to the coarsest of Nm. 2 faultlessly, either when such are stationary or moving. Long frayed ends of the yarn are prevented due to the exceptionally small cutting time which, on the average, amounts to 0.1 to 0.2 millisecond.
  • Cutting mechanism for cutting thin, elongate structures, said cutting mechanism comprising a cutting knife and a countersurface, said cutting knife possessing a blunt cutting end portion, said cutting knife and said countersurface being formed of hard metal, means for displacing said countersurface relative to said cutting knife in a plane substantially perpendicular to said countersurface, and wherein said displacing means comprises an electromagnet provided with an armature.
  • said electromagnet having a coil, circuit means for controlling energization of said coil, said circuit means including a relay in circuit with said coil, a control transistor for controlling operation of said relay, a storage capacitor connected in parallel with said relay, a direct-current source, and a charging resistor coupling said storage capacitor with said direct-current source.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US538320A 1965-04-06 1966-03-29 Cutting mechanism for thin, elongate structures Expired - Lifetime US3405582A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH474865A CH453156A (de) 1965-04-06 1965-04-06 Trennvorrichtung für dünne längliche Gebilde und Verwendung derselben

Publications (1)

Publication Number Publication Date
US3405582A true US3405582A (en) 1968-10-15

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ID=4281829

Family Applications (1)

Application Number Title Priority Date Filing Date
US538320A Expired - Lifetime US3405582A (en) 1965-04-06 1966-03-29 Cutting mechanism for thin, elongate structures

Country Status (7)

Country Link
US (1) US3405582A (nl)
CH (1) CH453156A (nl)
DE (1) DE1940021U (nl)
ES (1) ES324911A1 (nl)
GB (1) GB1146903A (nl)
NL (1) NL6604187A (nl)
SE (1) SE311002B (nl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4697726A (en) * 1985-09-11 1987-10-06 Electronique Serge Dassault Device for cutting a strip of paper or similar material along preestablished transverse lines of weakness
US5740717A (en) * 1996-12-19 1998-04-21 Mcneil-Ppc, Inc. Blister package scoring machine
US6516949B2 (en) 1995-10-31 2003-02-11 Mcneil-Ppc, Inc. Blister pill package with safety backing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504388U (nl) * 1973-05-07 1975-01-17
DE29905169U1 (de) 1999-03-20 1999-06-10 Battenfeld Extrusionstechnik Gmbh, 32547 Bad Oeynhausen Vorrichtung zum Durchtrennen von endlosen Profilen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361288A (en) * 1944-04-17 1944-10-24 Simonds Saw & Steel Co Cutting rule
US3023656A (en) * 1958-10-20 1962-03-06 J F Scholten And Zonen N V Cutting device
US3176572A (en) * 1962-10-05 1965-04-06 Ralph L Comet Tape cutting and dispensing device
US3322013A (en) * 1964-08-28 1967-05-30 Zellweger Uster Ag Yarn cutting and clamping mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361288A (en) * 1944-04-17 1944-10-24 Simonds Saw & Steel Co Cutting rule
US3023656A (en) * 1958-10-20 1962-03-06 J F Scholten And Zonen N V Cutting device
US3176572A (en) * 1962-10-05 1965-04-06 Ralph L Comet Tape cutting and dispensing device
US3322013A (en) * 1964-08-28 1967-05-30 Zellweger Uster Ag Yarn cutting and clamping mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4697726A (en) * 1985-09-11 1987-10-06 Electronique Serge Dassault Device for cutting a strip of paper or similar material along preestablished transverse lines of weakness
US6516949B2 (en) 1995-10-31 2003-02-11 Mcneil-Ppc, Inc. Blister pill package with safety backing
US5740717A (en) * 1996-12-19 1998-04-21 Mcneil-Ppc, Inc. Blister package scoring machine

Also Published As

Publication number Publication date
SE311002B (nl) 1969-05-19
DE1940021U (de) 1966-06-02
CH453156A (de) 1968-05-31
NL6604187A (nl) 1966-10-07
GB1146903A (en) 1969-03-26
ES324911A1 (es) 1967-04-01

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