US3791438A - Process for manufacturing a wear-resistant cast metal product - Google Patents

Process for manufacturing a wear-resistant cast metal product Download PDF

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Publication number
US3791438A
US3791438A US00238614A US3791438DA US3791438A US 3791438 A US3791438 A US 3791438A US 00238614 A US00238614 A US 00238614A US 3791438D A US3791438D A US 3791438DA US 3791438 A US3791438 A US 3791438A
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US
United States
Prior art keywords
process according
resin
weight
wear
parts
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
US00238614A
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English (en)
Inventor
K Ikeda
T Kayama
T Arai
T Yamamura
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.)
Honda Motor Co Ltd
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Honda Motor Co 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Application granted granted Critical
Publication of US3791438A publication Critical patent/US3791438A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • B22D19/085—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal of anti-frictional metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure

Definitions

  • ABSTRACT A cast metal product, such as a bearing, haying improved wear resistance and lubricating properties is obtained using the die casting process, wherein a molten metal, such as aluminum, is supplied under pressure into a mold cavity through a conduit by the pushing action of a plunger, by adding to the molten metal in the conduit a thermoplastic resin, such as polyethylene, or a mixture of such resin with a powdered lubricant, such as graphite'or a powdered wear-resistant material, such as silicon.
  • a molten metal such as aluminum
  • the process of the invention is characterized in that, when a molten metal suitable for casting, such as aluminum, aluminum alloy or the like is supplied under pressure into a mold cavity through a conduit by the pushing action of a plunger, a mass of thermoplastic resin alone or a thermoplastic resin in combination with a powdered lubricant or wear-resistant material, such as graphite, molybdenum disulfide, lead, a thermosetting resin or the like, is addedto the molten metal in the conduit so that the addition may be contained in a uniformly dispersed form in the molten metal.
  • a molten metal suitable for casting such as aluminum, aluminum alloy or the like
  • the cast metal product obtained according to the invention has improved wear resistance and lubricating properties.
  • thermoplastic resin such as polypropylene, polyethylene, polystyrene or the like is prepared in the conduit of a mold of a high pressure, high speed casting machine, whereby in the course of the casting process the resin mass is melted by being in contact with the molten metal and is carried into the cavity along with the molten metal.
  • the molten metal is well agitated by producing jet flow and'turbulent flow at a gate portion and at the same time the molten resin is dispersed into a fine spherical or particle form .by the surface tension thereof and is mixed in the molten metal.
  • the resin to be added is desirably such that, after being melted by the increase in temperature, it is low in viscosity and is dispersed in a fine spherical form. Therefore a resin of low molecular weight is suitable.
  • the cast product of aluminum or the like exhibits excellent wear-resistant and lubricating properties when it'contains the thermoplastic resin.
  • this resin is mixed with a powdered lubricant such as graphite, molybdenum disulfide, lead, tin, copper, thermosetting resin such as polytetrafluoroethylene, phenolic resin, epoxy resin or the like, or with a powdered wearresistant material such as silicon or the like, the powdered material is uniformly dispersed in the molten metal in such a manner that the same is coated by the thermoplastic-resin, whereby the wear-resistant and/or lubricating properties of the product can be improved to an even greater extent.
  • a powdered lubricant such as graphite, molybdenum disulfide, lead, tin, copper, thermosetting resin such as polytetrafluoroethylene, phenolic resin, epoxy resin or the like, or with a powdered wearresistant material such as silicon or the like
  • thermoplastic resin by merely supplygiven excellent wear-resistant and lubricating properties by the characteristic properties of the thermoplastic resin.
  • the thermoplastic resin is mixed with the proper amount of any desired material in powdered form, for example, a powdered lubricant such as graphite, molybdenum disulfide, tin, lead, copper, thermosetting resin or the like or a powdered wear-resistant material such as silicon or the like, the added material is uniformly dispersed in the cast product along with. the thermoplastic resin, whereby the wear-resistant.
  • a powdered lubricant such as graphite, molybdenum disulfide, tin, lead, copper, thermosetting resin or the like
  • a powdered wear-resistant material such as silicon or the like
  • EXAMPLE 1 A small mass of low molecular weight polyethylene resin was added to molten aluminum in the conduit of a casting machine so that the resin was contained in the amount of about 3 percent, by weight, in the aluminum cast product. Thus, a product having excellent properties as a bearing member was obtained.
  • EXAMPLE 2 Low molecular weight polyethylene parts by weight Teflon powder (polytetrafluoroethylene) 30 parts by weight A small mass of the above mixture was added to moltenaluminum in the conduit of a casting machine, so that the mixture was contained in the amount of about 3 percent, by weight, in the aluminum cast product. This product was excellent as a bearing member.
  • EXAMPLE 3 Low molecular weight polyethylene resin 20 parts by weight Graphite powder 5 parts by weight Silicon powder 70 parts by weight Oil 5 parts by weight A small mass of the above mixture was added to molten aluminum iron alloy in the conduit of a casting machine, so that the mixture was contained in the amount of about 5 percent, by weight, in the aluminum cast iron. This product was excellent as a bearing member.
  • thermoplastic material selected from the group consisting of thermoplastic resins, thermoplastic resins mixed with a powdered lubricant, and thermoplastic resins mixed with a powdered wearresistant material, whereby the additive becomes uniformly dispersed in the molten metal.
  • a process according to claim 1 wherein the metal is selected from the group consisting of aluminum and aluminum alloys.
  • thermoplastic resin is selected from the group consisting of polyethylene, polypropylene and polystyrene.
  • thermoplastic resin is present in an amount of about 3 percent by weight based on the weight of the metal.
  • powdered lubricant is selected from the group consisting of 5 graphite, molybdenum disulfide, lead, tin, copper, polytetrafluoroethylene resin, phenolic resins and epoxy resins.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Sliding-Contact Bearings (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Lubricants (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
US00238614A 1971-03-27 1972-03-27 Process for manufacturing a wear-resistant cast metal product Expired - Lifetime US3791438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46017606A JPS503734B1 (enrdf_load_stackoverflow) 1971-03-27 1971-03-27

Publications (1)

Publication Number Publication Date
US3791438A true US3791438A (en) 1974-02-12

Family

ID=11948527

Family Applications (1)

Application Number Title Priority Date Filing Date
US00238614A Expired - Lifetime US3791438A (en) 1971-03-27 1972-03-27 Process for manufacturing a wear-resistant cast metal product

Country Status (6)

Country Link
US (1) US3791438A (enrdf_load_stackoverflow)
JP (1) JPS503734B1 (enrdf_load_stackoverflow)
AU (1) AU470226B2 (enrdf_load_stackoverflow)
CA (1) CA974359A (enrdf_load_stackoverflow)
DE (1) DE2214951C3 (enrdf_load_stackoverflow)
GB (1) GB1347181A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207096A (en) * 1976-02-02 1980-06-10 Hitachi, Ltd. Method of producing graphite-containing copper alloys
US4340109A (en) * 1980-02-25 1982-07-20 Emerson Electric Co. Process of die casting with a particulate inert filler uniformly dispersed through the casting

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158913A (en) * 1961-07-17 1964-12-01 American Metallurg Products Co Method of treating steel
US3362464A (en) * 1964-05-21 1968-01-09 Hoechst Ag Process for obtaining smooth surfaces of metal ingots made by chill casting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158913A (en) * 1961-07-17 1964-12-01 American Metallurg Products Co Method of treating steel
US3362464A (en) * 1964-05-21 1968-01-09 Hoechst Ag Process for obtaining smooth surfaces of metal ingots made by chill casting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207096A (en) * 1976-02-02 1980-06-10 Hitachi, Ltd. Method of producing graphite-containing copper alloys
US4340109A (en) * 1980-02-25 1982-07-20 Emerson Electric Co. Process of die casting with a particulate inert filler uniformly dispersed through the casting

Also Published As

Publication number Publication date
CA974359A (en) 1975-09-16
DE2214951A1 (de) 1972-10-19
GB1347181A (en) 1974-02-27
JPS503734B1 (enrdf_load_stackoverflow) 1975-02-08
AU470226B2 (en) 1973-10-04
AU4044172A (en) 1973-10-04
DE2214951C3 (de) 1974-03-28
DE2214951B2 (de) 1973-08-30

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