US3732771A - Knives for fiber tow-cutting apparatus - Google Patents

Knives for fiber tow-cutting apparatus Download PDF

Info

Publication number
US3732771A
US3732771A US00160293A US3732771DA US3732771A US 3732771 A US3732771 A US 3732771A US 00160293 A US00160293 A US 00160293A US 3732771D A US3732771D A US 3732771DA US 3732771 A US3732771 A US 3732771A
Authority
US
United States
Prior art keywords
knife
weight
knives
content
coating layer
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
US00160293A
Other languages
English (en)
Inventor
S Kinoshita
K Shinmura
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.)
Teijin Ltd
Original Assignee
Teijin Ltd
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 Teijin Ltd filed Critical Teijin Ltd
Application granted granted Critical
Publication of US3732771A publication Critical patent/US3732771A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
    • D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting
    • 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
    • Y10T83/485—Cutter with timed stroke relative to moving work
    • Y10T83/494—Uniform periodic tool actuation
    • 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
    • Y10T83/9372—Rotatable type
    • 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
    • Y10T83/97—Miscellaneous

Definitions

  • the invention relates to knives for a cutter in used in manufacturing staple fibers by cutting a synthetic tow, and the knives are characterized by as follows:
  • the blade of the knives is made of steel having the following composition:
  • a layer of metallic coating is provided only on one side of the knife, such layer having a thickness ranging from 2 to 50 microns, and preferably 2 25 microns, and a Vickers hardness of above 700.
  • the conventional knife material in the Gru-Gru cutter has been disclosed, for example, in US. Pat. No. 2,792,887.
  • the knives used in this type of cutter have previously been made of steel materials such as high speed steel, stainless steel or carbon tool steel and have been given a suitable heat treatment to the edges thereof. These knives have been used mounted on the knife-head of the Gru-Gru cutter.
  • edges of the knives are susceptible to chipping during the cutting of a tow. Therefore, these chips may be mixed in the staple fibers and cause problems in the subsequent treatment steps of the spinning process. Still further the nicked edges entail problems such as miscutting or fusing of the tow which occurs in the case of the use of dulled edged knives as hereinbefore described.
  • Knives for fiber tow-cutting apparatus have been studied in an attempt to overcome these drawbacks of the prior art.
  • the knives for the Gru-Gru cutter whose properties have been markedly improved can be obtained by making the blade body of the knives with the steel material of the hereinbefore described composition, i.e., one belonging to the category of bearing steels which have been heretofore used in an area different from that of cutlery such as knives of the Gru-Gru" cutter, and by providing the blade body, on one side only, with a layer of metallic coating, and preferable chromium plating layer ofa thickness between 2 microns and 50 microns and a Vickers hardness of about 700, preferably above 800.
  • An object of the present invention therefore is to overcome the drawbacks in the conventional knives for the Gru-Gru cutter and to provide knives for the Gru-Gru cutter whose excellent cutting ability can be stably maintained for an especially prolonged period of time without miscutting tow or fused end fibers, thereby making it possible to demonstrate a pronounced improvement in the working efficiency and productive capability in the manufacture of staple fibers.
  • the present invention departs from the conventional conception of using cutlery steel as the steel material of knives for the Gru-Gru cutter which is used specifically for cutting synthetic tows, and instead uses the steel material which has hitherto been used principally for bearing purposes in view of its suitability therefor.
  • the knives according to the invention are made of bearing steel and are provided on one side only with a thin layer of a metallic coating preferably a chromium plating layer of less than 50 microns in thickness and preferably a thin layer within specified limits, and of Vickers hardness of above 700.
  • the blade with a major portion of the knife is made of the steel material as hereinabove described and this is covered only on.one side with the aforesaid metallic coating, the dulling of the knives in an extremely short period of time carrying out cutting of synthetic tows has not only been ingeniously avoided but also such other drawbacks as the entry into the staple fiber stock of chips resulting from the nicking of the edge has been conveniently overcome, and the occurrence of miscuts and fusing of the tows during their cutting have also entirely been overcome.
  • the invention has succeeded in achieving remarkable improvements in increasing the life of knives as well as working and productive efficiency of the operation of cutting the synthetic tow. This surprising improved effect will be readily appreciated in connection with the results of the hereinafter given examples and comparative data.
  • FIG. 1 is a plan view of one embodiment of the knives of the present invention, a plurality of which are exchangeably mounted and secured to the knifehead ofa Gru-Gru cutter;
  • FIG. 2 is a enlarged crosssectional view taken along line AA of FIG. 1;
  • FIG. 2' is a cross-sectional view of a conventional knife similar to that of FIG. 2;
  • FIG. 3 is a cross-sectional view similar to that of FIG. 2 illustrating that of another embodiment of the invention;
  • FIG. 4 is a similar enlarged cross-sectional view partly cut away illustrating the edge portion of the knife of the invention.
  • an arm 4 by which the knife is mounted to the knife-head is provided with a mounting hole 5.
  • the knife portion extends from the arm 4 in angular relationship to the planar axis of the arm.
  • the blade body 1 extended usually is provided with a face 1' at the edge portion of the blade body just before arriving at the knife edge, and a face 2' of the terminal portion of the coating of the layer 2 of metallic coating (see FIG. 2) appears at the terminal portion of the edge. This forms an extremity 3 of the edge.
  • FIG. 2 shows the edge by means of a cross-sectional view taken along line A-A of FIG. 1.
  • the blade body 1 inclusive of the face 1 is made ofa steel material having the composition given in (i), beforementioned.
  • the blade body 1 is provided only on its one side with a metallic coating layer of a thickness ranging from 2 microns to 50 microns, preferably 2 25 microns, especially 5 25 microns, and ofa Vickers hardness of above 700, preferably above 800.
  • the terminal portion of this metallic coating layer appears beyond the terminal edge portion of the blade body 1 to form the edge of the knife. Therefore, in the knife of the invention the material of which this metallic coating layer is made plays a direct role in determining the cutting life of the knife when used in the operation of cutting synthetic tows.
  • the material such, for example. as high speed steel of which the blade body 1 is made extends to the terminal portion of the edge. Therefore, since the blade body and the terminal portion ofthe edge are made of the same material, the material of which the blade body is made plays a direct role in determining the tow cutting ability of the knife.
  • the metallic materials such, for example, as chromium, tungsten or tungsten carbides can be used, and chromium is most preferable.
  • the methods of forming the metallic coating layer are already known. Any of'the various methods by which the blade body and the metallic coating layer can be firmly bonded can be employed. As to forming methods the electroplating method, the flame plating method and the soldering or bonding method can be mentioned.
  • FIG. 3 illustrates a modification of a knife similar to that shown in FIG. 2.
  • This embodiment is provided with a face 1" in addition to the face 1.
  • the edge angle a of the knives according to the invention is preferably 5- 40, especially 10- 30.
  • the edge angle a denotes, as shown in FIGS. 2 and 3, an angle made in the A-A line section, at right angles to the axis of the knife, by the face 1' extending directly to the tip 3 of the blade and a tangent to the curvilinear surface of the metallic coating layer.
  • the surface of the metallic coating layer should preferably have a Vickers hardness of above 800, and this should preferably be at least 50 higher in the Vickers hardness than the surface of the steel material of which the blade body is made.
  • FIG. 4 is a partly cutaway cross-sectional view of the knife edge terminal portion.
  • the face 1' though originally of the form shown by the dotted line in the figure, abrades at all times ahead of the face 2 of the terminal portion of the coating formed at the knife edge.
  • the face 1' becomes as shown by 1 in the figure and, as a consequence, promotes the maintenance of the face 2', including the knife edge extremity 3, continually in a sharp state.
  • the knife edge terminal portion, including the knife edge extremity 3 abrades at the same rate as the blade body material, with the consequence that the edge becomes dull.
  • a Gru-Gru cutter whose knife-head is mounted with the knives to be tested is used, and the cutting of synthetic tows is carried out at a cutting speed of I00 meters per minute.
  • sampling is carried out every S-minutes, taking 10 grams of the cut staple fibers in each sampling. From the obtained samples one gram thereof is taken at random and from the obtained 1 gram of sample I milligram sample is further taken at random. For example, in the case of 1.4 denier nylon filament tow about 120 I ends of monofilaments are contained in the final sample.
  • EXAMPLE 1V AND COMPARISONS VIII 1X Blade body'materials of the following two classes of compositions were used and knives of identical shape were made in each case.
  • the durability improvement test was then carried out in accordance with the hereinbe'fo r'e described method to determine their respective durability times X.
  • the average durability time of the 100 knives, the durability improvement rate and the number of knives in which damage of the knife edges were noted in the case of each of these classes of knives are shown in Table 2.
  • the tow used in this test was the same as that used in Example 1,
  • Blade Composition of Steel Materials (wt. 7:) Body Impuri- Material C Si Cr Mn+P+S ties Fe No. 9 0.45015 0.45 0.86 0.97 remainder No. 10 0140.40 12.50 0.75 0.55 do.
  • the tow used was of total denier 500,000 consisting of polyester synthetic fibers (drawn) of monofilament denier of 1.4.
  • the blade body of the knife is formed of a steel material having the following composition:
  • one side of said knife is provided with a metallic coating layer of a thickness ranging from 2 microns to 50 microns and of Vickers hardness of above 700.
  • Content of Fe of the surface of the coating layer on one side of said blade is at least 50 higher than that of the surface of the said blade portion made of steel material.
  • a metallic coating layer of chromium of thickness of 5 25 microns and Vickers hardness of above 700 is provided only on one side of said knife, and the edge angle a of said knife is 10 30.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Knives (AREA)
  • Inorganic Fibers (AREA)
US00160293A 1970-08-26 1971-07-07 Knives for fiber tow-cutting apparatus Expired - Lifetime US3732771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7481870 1970-08-26

Publications (1)

Publication Number Publication Date
US3732771A true US3732771A (en) 1973-05-15

Family

ID=13558259

Family Applications (1)

Application Number Title Priority Date Filing Date
US00160293A Expired - Lifetime US3732771A (en) 1970-08-26 1971-07-07 Knives for fiber tow-cutting apparatus

Country Status (6)

Country Link
US (1) US3732771A (OSRAM)
CA (1) CA955127A (OSRAM)
DE (1) DE2142215B2 (OSRAM)
FR (1) FR2106083A5 (OSRAM)
GB (1) GB1324484A (OSRAM)
NL (1) NL145601B (OSRAM)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155318A (en) * 1977-06-02 1979-05-22 Yoshio Yamamoto Looper for tufting machines
US4358979A (en) * 1980-11-24 1982-11-16 Exxon Research & Engineering Co. Apparatus for cutting plastic film
EP0707921A2 (de) 1994-10-22 1996-04-24 Zwilling J. A. Henckels Aktiengesellschaft Messer und Verfahren zur Herstellung eines Messers
US20030209119A1 (en) * 2001-02-06 2003-11-13 Williams Edward E. Apparatus and process for cutting extruded material
US20090107371A1 (en) * 2007-02-01 2009-04-30 Groz-Beckert Kg Gripper for a tufting machine
US20100101470A1 (en) * 2008-10-29 2010-04-29 Groz-Beckert Kg Tool for the manufacture of flat textiles
CN101240488B (zh) * 2007-02-01 2011-11-16 格罗兹-贝克特公司 用于簇绒机的夹纱器
US20120024208A1 (en) * 2010-07-28 2012-02-02 Groz-Beckert Kg Gripper with dual-insert body
US20160113202A1 (en) * 2014-10-24 2016-04-28 Dean Mayerle Cutting Blade
US20220380955A1 (en) * 2019-11-07 2022-12-01 Vandewiele Sweden Ab Tufting tool with insert

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052911A (en) * 1989-04-27 1991-10-01 Mikeska Olvin J Underwater pelletizer blade
FR2901496A1 (fr) * 2006-05-24 2007-11-30 Fivalec Electronic Sarl Alliage pour revetir des pieces de soudage et son procede d'obtention
EP1985726A1 (de) * 2007-04-27 2008-10-29 WMF Aktiengesellschaft Schneidwerkzeug mit einer Hartstoff verstärkten Schneidkante
DE102011050601A1 (de) * 2011-05-24 2012-11-29 Heusch Gmbh & Co. Kg Messer und Schneideinrichtung sowie Verfahren zum Schneiden

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747663A (en) * 1951-12-28 1956-05-29 Du Pont Yarn cutter
US2792887A (en) * 1952-07-08 1957-05-21 American Enka Corp Device for cutting staple fiber
US3387521A (en) * 1965-04-21 1968-06-11 Teijin Seiki Co Ltd Fiber tow cutting apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747663A (en) * 1951-12-28 1956-05-29 Du Pont Yarn cutter
US2792887A (en) * 1952-07-08 1957-05-21 American Enka Corp Device for cutting staple fiber
US3387521A (en) * 1965-04-21 1968-06-11 Teijin Seiki Co Ltd Fiber tow cutting apparatus

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155318A (en) * 1977-06-02 1979-05-22 Yoshio Yamamoto Looper for tufting machines
US4358979A (en) * 1980-11-24 1982-11-16 Exxon Research & Engineering Co. Apparatus for cutting plastic film
EP0707921A2 (de) 1994-10-22 1996-04-24 Zwilling J. A. Henckels Aktiengesellschaft Messer und Verfahren zur Herstellung eines Messers
EP0707921A3 (de) * 1994-10-22 1997-07-23 Zwilling J A Henckels Aktienge Messer und Verfahren zur Herstellung eines Messers
US20030209119A1 (en) * 2001-02-06 2003-11-13 Williams Edward E. Apparatus and process for cutting extruded material
US7121181B2 (en) * 2001-02-06 2006-10-17 Good Earth Tool Company Apparatus and process for cutting extruded material
US20090107371A1 (en) * 2007-02-01 2009-04-30 Groz-Beckert Kg Gripper for a tufting machine
CN101240488B (zh) * 2007-02-01 2011-11-16 格罗兹-贝克特公司 用于簇绒机的夹纱器
US8082862B2 (en) 2007-02-01 2011-12-27 Groz-Beckert Kg Gripper for a tufting machine
US20100101470A1 (en) * 2008-10-29 2010-04-29 Groz-Beckert Kg Tool for the manufacture of flat textiles
EP2182103A1 (de) * 2008-10-29 2010-05-05 Groz-Beckert KG Werkzeug für die Herstellung textiler Flächen
US20120024208A1 (en) * 2010-07-28 2012-02-02 Groz-Beckert Kg Gripper with dual-insert body
US20160113202A1 (en) * 2014-10-24 2016-04-28 Dean Mayerle Cutting Blade
US20220380955A1 (en) * 2019-11-07 2022-12-01 Vandewiele Sweden Ab Tufting tool with insert
US11807971B2 (en) * 2019-11-07 2023-11-07 Vandewiele Sweden Ab Tufting tool with insert

Also Published As

Publication number Publication date
DE2142215B2 (de) 1973-07-26
DE2142215A1 (de) 1972-03-02
NL7109840A (OSRAM) 1972-02-29
FR2106083A5 (OSRAM) 1972-04-28
NL145601B (nl) 1975-04-15
CA955127A (en) 1974-09-24
GB1324484A (en) 1973-07-25

Similar Documents

Publication Publication Date Title
US3732771A (en) Knives for fiber tow-cutting apparatus
US4653373A (en) Knife blade and method for making same
RU2305623C2 (ru) Самозатачивающийся режущий инструмент с твердым покрытием
DE3874635T3 (de) Schneidwerkzeug.
US3762243A (en) Methods of making sharp-edge cutting elements
Demir et al. Influence of the heat treatment on the microstructure and machinability of AISI H13 hot work tool steel
EP0567300A1 (en) Knife blades
DE69218767T2 (de) Messerklingen
DE19927478A1 (de) Oberflächenbehandelte Stahlschneidwerkzeug
Wang et al. Performance of PVD-coated carbide tools when machining Ti-6Al-4V©
US4627317A (en) Consumable ceramic ledge tool
Opitz et al. Some recent research on the wear behaviour of carbide cutting tools
JPH02252501A (ja) 木材回転切削用刃物
EP1850993A1 (de) Sägeband und verfahren zur herstellung eines sägebandes
PL180548B1 (pl) Material podstawowy do produkcji brzeszczotów i sposób wytwarzania materialu podstawowego do produkcji brzeszczotów, zwlaszcza do pil tarczowych, tarcz rozcinajacych, pil trakowych oraz urzadzen tnacych i wygladzajacych PL PL PL PL PL PL
US4583431A (en) Self-sharpening coated tool constructions
EP1113908B1 (de) Messer zum schneiden laufender materialbahnen
Soliman et al. On the improvement of the performance of high speed steel turning tools by TiN coatings
JPH05228729A (ja) シェービングダイス
Ezugwu et al. Effects of coating materials on the machinability of a nickel base, C-263, alloy
CN208592870U (zh) 刀具
Chattopadhyay et al. Wear characteristics of ceramic cutting tools in machining steel
JP2713709B2 (ja) 刃 物
Barrow Wear of cutting tools
JP2665565B2 (ja) 木材平削り用刃物