FR2109624A5 - High density electric arc electrodes - moulded from graphite and phenol formaldehyde resin in concrete former - Google Patents

High density electric arc electrodes - moulded from graphite and phenol formaldehyde resin in concrete former

Info

Publication number
FR2109624A5
FR2109624A5 FR7122447A FR7122447A FR2109624A5 FR 2109624 A5 FR2109624 A5 FR 2109624A5 FR 7122447 A FR7122447 A FR 7122447A FR 7122447 A FR7122447 A FR 7122447A FR 2109624 A5 FR2109624 A5 FR 2109624A5
Authority
FR
France
Prior art keywords
formaldehyde resin
phenol formaldehyde
graphite
moulded
high density
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
Application number
FR7122447A
Other languages
French (fr)
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.)
ThyssenKrupp Budd Co
Original Assignee
Budd Co
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 Budd Co filed Critical Budd Co
Application granted granted Critical
Publication of FR2109624A5 publication Critical patent/FR2109624A5/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable
    • H05B7/085—Electrodes non-consumable mainly consisting of carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B23H1/04—Electrodes specially adapted therefor or their manufacture
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Products (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Discharge Heating (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The electrodes of specified shape are cast in a low shrinkage concrete matrix contg. Portland cement which can withstand compression strength of is not 1500-2000 psi. by filling the matrix cavity with a mix of 92-85% flocculate graphite powder and quick hardening two step phenol formaldehyde resin, compressing to 105.5-140.6 kg/cm2 under heat, and firing at 960-2760 degrees C under inert atmos. to convert resin to carbon.
FR7122447A 1970-10-26 1971-06-21 High density electric arc electrodes - moulded from graphite and phenol formaldehyde resin in concrete former Expired FR2109624A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8380470A 1970-10-26 1970-10-26

Publications (1)

Publication Number Publication Date
FR2109624A5 true FR2109624A5 (en) 1972-05-26

Family

ID=22180812

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7122447A Expired FR2109624A5 (en) 1970-10-26 1971-06-21 High density electric arc electrodes - moulded from graphite and phenol formaldehyde resin in concrete former

Country Status (3)

Country Link
DE (1) DE2139055A1 (en)
ES (1) ES392922A1 (en)
FR (1) FR2109624A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303134A1 (en) * 1982-05-24 1983-11-24 Experimentalnyj Naučno-Issledovatelskij Institut Metallorežuščich Stankov, Moskva Carbon material for producing tool electrodes used for electric discharge machining, and process for producing them from material
WO2023041858A1 (en) 2021-09-14 2023-03-23 Psa Automobiles Sa Bumper crossmember having weakened regions around a hitch socket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303134A1 (en) * 1982-05-24 1983-11-24 Experimentalnyj Naučno-Issledovatelskij Institut Metallorežuščich Stankov, Moskva Carbon material for producing tool electrodes used for electric discharge machining, and process for producing them from material
WO2023041858A1 (en) 2021-09-14 2023-03-23 Psa Automobiles Sa Bumper crossmember having weakened regions around a hitch socket

Also Published As

Publication number Publication date
ES392922A1 (en) 1973-11-01
DE2139055A1 (en) 1972-05-04

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Legal Events

Date Code Title Description
ST Notification of lapse