JPH03240940A - Screw for plastic molding machine and its manufacture - Google Patents

Screw for plastic molding machine and its manufacture

Info

Publication number
JPH03240940A
JPH03240940A JP2036338A JP3633890A JPH03240940A JP H03240940 A JPH03240940 A JP H03240940A JP 2036338 A JP2036338 A JP 2036338A JP 3633890 A JP3633890 A JP 3633890A JP H03240940 A JPH03240940 A JP H03240940A
Authority
JP
Japan
Prior art keywords
screw
base metal
alloy
layer
manufacture
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.)
Pending
Application number
JP2036338A
Other languages
Japanese (ja)
Inventor
Akimitsu Komuro
Original Assignee
Sumitomo Heavy Ind 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 Sumitomo Heavy Ind Ltd filed Critical Sumitomo Heavy Ind Ltd
Priority to JP2036338A priority Critical patent/JPH03240940A/en
Publication of JPH03240940A publication Critical patent/JPH03240940A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws

Abstract

PURPOSE:To manufacture a screw for a plastic molding machine in which cracks are prevented by interposing an intermediate metallic layer having intermediate properties between a screw base metal and an alloy layer having wear resistance and corrosion resistance. CONSTITUTION:A thermally sprayed layer 12 of intermediate mixed alloy metallic powder (with about 0.5 mm thickness B) having intermediate properties is formed on the surface of a screw base metal 11 (such as a Cr-Mo steel) worked into a screw shape by thermal spraying treatment. Furthermore, this mixed metallic powder is regulated to the one obtd. by mixing alloy powder of Ni-series or the like having wear resistance and corrosion resistance with about 30 to 70wt.% Fe-series metallic powder of the same quality as that of the base metal 11. Moreover, an alloy powder thermal sprayed layer 13 (of an Fe-series with about 0.5 mm thickness C) having wear resistance and corrosion resistance is formed on the above thermal sprayed layer 12 to manufacture a base metal 14 for HIP. This base metal 14 is charged to a pipe-shape superplastic capsule 15, is vacuum-sealed, is subjected to pressure sintering by HIP treatment to form an alloy layer 19. Then, a deformed capsule 20 is removed away, and the alloy layer 19 is ground, by which a screw product 21 can be obtd.
JP2036338A 1990-02-19 1990-02-19 Screw for plastic molding machine and its manufacture Pending JPH03240940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2036338A JPH03240940A (en) 1990-02-19 1990-02-19 Screw for plastic molding machine and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2036338A JPH03240940A (en) 1990-02-19 1990-02-19 Screw for plastic molding machine and its manufacture

Publications (1)

Publication Number Publication Date
JPH03240940A true JPH03240940A (en) 1991-10-28

Family

ID=12467046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2036338A Pending JPH03240940A (en) 1990-02-19 1990-02-19 Screw for plastic molding machine and its manufacture

Country Status (1)

Country Link
JP (1) JPH03240940A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0418321A (en) * 1990-05-11 1992-01-22 Mitsubishi Heavy Ind Ltd Lining screw
JPH0568626U (en) * 1992-02-24 1993-09-17 株式会社名機製作所 Injection molding machine screw
US5904966A (en) * 1993-09-24 1999-05-18 Innovative Sputtering Technology N.V. (I.S.T.) Laminated metal structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0418321A (en) * 1990-05-11 1992-01-22 Mitsubishi Heavy Ind Ltd Lining screw
JPH0568626U (en) * 1992-02-24 1993-09-17 株式会社名機製作所 Injection molding machine screw
US5904966A (en) * 1993-09-24 1999-05-18 Innovative Sputtering Technology N.V. (I.S.T.) Laminated metal structure

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