WO1994014582A1 - A method for improving the cutting capacity of ceramic knives - Google Patents

A method for improving the cutting capacity of ceramic knives Download PDF

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Publication number
WO1994014582A1
WO1994014582A1 PCT/SE1993/001082 SE9301082W WO9414582A1 WO 1994014582 A1 WO1994014582 A1 WO 1994014582A1 SE 9301082 W SE9301082 W SE 9301082W WO 9414582 A1 WO9414582 A1 WO 9414582A1
Authority
WO
WIPO (PCT)
Prior art keywords
knives
improving
cutting
edge
ceramic
Prior art date
Application number
PCT/SE1993/001082
Other languages
French (fr)
Inventor
Martin BURSTRÖM
Arne Nissen
Gudmundur Gunnarsson
Olavi Lindén
Original Assignee
Institutet För Verkstadsteknisk Forskning
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 Institutet För Verkstadsteknisk Forskning filed Critical Institutet För Verkstadsteknisk Forskning
Priority to DE4396873T priority Critical patent/DE4396873T1/en
Priority to AU57237/94A priority patent/AU5723794A/en
Publication of WO1994014582A1 publication Critical patent/WO1994014582A1/en
Priority to DK067095A priority patent/DK67095A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00—Blades for hand knives

Definitions

  • the invention relates to ceramic knives, which are manufac- tured from zirconium dioxide or other monolithic ceramics or composite ceramics. It is known that the cutting edge sharp ⁇ ness of ceramic knives has a better durability than that of metal knives. On the other hand it may be difficult to generate better cutting properties at a ceramic knife as compared to a corresponding metal knife.
  • a substantial improvement of the cutting ability is obtained by making regular in-grindings or grooves 1 designed thus that also the groove has a sharp edge at the edge-side 2 of the knife.
  • the grooves are made very close to each other the cutting edge may be perceived as toothed. It is suggested that the depth of the grooves are > 0.1 mm. It is suggested that the width of the grooves are ⁇ 0,2 mm, and preferably > 0.5 mm.
  • the cutting properties have been evaluated in tests at a testing rig with zirconium dioxide knives having shallow down grindings. It was not possible to establish any wear at the toothed edge, which must be considered unexpected.
  • the test referred to cutting of cardboard with a 2 kp load on the 50 mm long knife at cutting during a day.
  • knives of this type shall be useful within the food industry, particularly in fish filleting machines and at paper cutting.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

A method for increasing the cutting properties of ceramic industrial knives obtained by providing the sharp knife edge (2) with shallow in-grindings (1) in the sharpened edge. The down grinding of local areas along the sharp knife edge can also be perceived as a toothing.

Description

A METHOD FOR IMPROVING THE CUTTING CAPACITY OF CERAMic KNIVES
The invention relates to ceramic knives, which are manufac- tured from zirconium dioxide or other monolithic ceramics or composite ceramics. It is known that the cutting edge sharp¬ ness of ceramic knives has a better durability than that of metal knives. On the other hand it may be difficult to generate better cutting properties at a ceramic knife as compared to a corresponding metal knife. At circular or longitudinal industrial knives (Fig. 1 and Fig. 2, resp.), which have a rotating or linear motion resp., a substantial improvement of the cutting ability is obtained by making regular in-grindings or grooves 1 designed thus that also the groove has a sharp edge at the edge-side 2 of the knife.
If the grooves are made very close to each other the cutting edge may be perceived as toothed. It is suggested that the depth of the grooves are > 0.1 mm. It is suggested that the width of the grooves are ≥ 0,2 mm, and preferably > 0.5 mm.
The cutting properties have been evaluated in tests at a testing rig with zirconium dioxide knives having shallow down grindings. It was not possible to establish any wear at the toothed edge, which must be considered unexpected. The test referred to cutting of cardboard with a 2 kp load on the 50 mm long knife at cutting during a day.
It is expected that knives of this type shall be useful within the food industry, particularly in fish filleting machines and at paper cutting.

Claims

1. A method of improving the cutting properties of rotating or reciprocating ceramic knives, c h a r a c t e r i z e d t h e r e i n that small in-grindings (1) are made in the edge (2), and shaped thus that the in-grindings (1) have sharp edges at the edge side (2) of the knives.
2. A method as claimed in claim 1, c h a r a c t e r i z e d t h e r e i n that the in-grinding (1) is made with a depth of > 0.1 mm.
3. A method as claimed in claim 1 or 2, c h a r a c t e r i z e d t h e r e i n that the in-grindings (1) are made with a width of > 0.2 mm, and preferably ≥ 0.5 mm.
PCT/SE1993/001082 1992-12-21 1993-12-17 A method for improving the cutting capacity of ceramic knives WO1994014582A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4396873T DE4396873T1 (en) 1992-12-21 1993-12-17 Method to improve the cutting ability of ceramic knives
AU57237/94A AU5723794A (en) 1992-12-21 1993-12-17 A method for improving the cutting capacity of ceramic knives
DK067095A DK67095A (en) 1992-12-21 1995-06-13 Process for improving the cutting properties of ceramic knives

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9203845-4 1992-12-21
SE9203845A SE9203845L (en) 1992-12-21 1992-12-21 Ways to improve the cutting ability of ceramic knives

Publications (1)

Publication Number Publication Date
WO1994014582A1 true WO1994014582A1 (en) 1994-07-07

Family

ID=20388191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/001082 WO1994014582A1 (en) 1992-12-21 1993-12-17 A method for improving the cutting capacity of ceramic knives

Country Status (5)

Country Link
AU (1) AU5723794A (en)
DE (1) DE4396873T1 (en)
DK (1) DK67095A (en)
SE (1) SE9203845L (en)
WO (1) WO1994014582A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9975260B2 (en) 2015-04-14 2018-05-22 Darex, Llc Cutting edge with microscopically sized channels to enhance cutting performance
JP2019063390A (en) * 2017-10-04 2019-04-25 アーネスト株式会社 Cutting tool and blade part thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5077901A (en) * 1990-05-18 1992-01-07 Warner Joseph A Ceramic blades and production methodology therefor
WO1992019424A1 (en) * 1991-04-24 1992-11-12 Mcpherson's Limited Knife blades

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5077901A (en) * 1990-05-18 1992-01-07 Warner Joseph A Ceramic blades and production methodology therefor
WO1992019424A1 (en) * 1991-04-24 1992-11-12 Mcpherson's Limited Knife blades

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9975260B2 (en) 2015-04-14 2018-05-22 Darex, Llc Cutting edge with microscopically sized channels to enhance cutting performance
JP2019063390A (en) * 2017-10-04 2019-04-25 アーネスト株式会社 Cutting tool and blade part thereof

Also Published As

Publication number Publication date
SE9203845L (en) 1994-06-22
AU5723794A (en) 1994-07-19
DE4396873T1 (en) 1996-01-25
DK67095A (en) 1995-06-13
SE9203845D0 (en) 1992-12-21

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