JPS55119103A - Graphite die for hot press - Google Patents

Graphite die for hot press

Info

Publication number
JPS55119103A
JPS55119103A JP2481679A JP2481679A JPS55119103A JP S55119103 A JPS55119103 A JP S55119103A JP 2481679 A JP2481679 A JP 2481679A JP 2481679 A JP2481679 A JP 2481679A JP S55119103 A JPS55119103 A JP S55119103A
Authority
JP
Japan
Prior art keywords
graphite
pin
product
die
hole
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
JP2481679A
Other languages
Japanese (ja)
Inventor
Yoshihiro Yamamoto
Shinji Nishio
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug 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 NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to JP2481679A priority Critical patent/JPS55119103A/en
Publication of JPS55119103A publication Critical patent/JPS55119103A/en
Pending legal-status Critical Current

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  • Powder Metallurgy (AREA)

Abstract

PURPOSE: To facilitate taking out of products from the titled die and enable the repeated use of graphite pin by a method wherein graphite pin to penetrate through hole is made of a nature possessing heat expansion coefficient higher than the processed product.
CONSTITUTION: Lower punch 2 having hole portion 3 being penetrated through is inserted within the outer die 1, and pin 4 having heat expansion coefficient higher than that of the product to be processed, for example, made of metal graphite material, is installed. Upper punch 6, having hole and filled with blank material 5 therearound, is inserted through the pinch 4, and the upper punch 6 is pressured while the blank material 5 is compressed, and sintered. At this operation, the lower die 1, upper and lower punch 6, 2 are formed by graphite, as is practiced in the conventional manner. The material 5 is sintered under high temperature, cooled and the processed product is taken out. At this time, because the pin is already separated from the inner wall of the hole portion 3, taking out the product is easy.
COPYRIGHT: (C)1980,JPO&Japio
JP2481679A 1979-03-02 1979-03-02 Graphite die for hot press Pending JPS55119103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2481679A JPS55119103A (en) 1979-03-02 1979-03-02 Graphite die for hot press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2481679A JPS55119103A (en) 1979-03-02 1979-03-02 Graphite die for hot press

Publications (1)

Publication Number Publication Date
JPS55119103A true JPS55119103A (en) 1980-09-12

Family

ID=12148705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2481679A Pending JPS55119103A (en) 1979-03-02 1979-03-02 Graphite die for hot press

Country Status (1)

Country Link
JP (1) JPS55119103A (en)

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