JPS5677029A - Production of press molding having tapered hole - Google Patents

Production of press molding having tapered hole

Info

Publication number
JPS5677029A
JPS5677029A JP15542879A JP15542879A JPS5677029A JP S5677029 A JPS5677029 A JP S5677029A JP 15542879 A JP15542879 A JP 15542879A JP 15542879 A JP15542879 A JP 15542879A JP S5677029 A JPS5677029 A JP S5677029A
Authority
JP
Japan
Prior art keywords
punch
lowered
die
floating
molding
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
JP15542879A
Other languages
Japanese (ja)
Inventor
Nobuo Saito
Yuji Hirose
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.)
Toto Ltd
Original Assignee
Toto 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 Toto Ltd filed Critical Toto Ltd
Priority to JP15542879A priority Critical patent/JPS5677029A/en
Publication of JPS5677029A publication Critical patent/JPS5677029A/en
Pending legal-status Critical Current

Links

Landscapes

  • Punching Or Piercing (AREA)

Abstract

PURPOSE: To improve productivity by packing raw material powder into the die consisting of upper and lower punches and a floating punch, pressure-grasping the same by means of the upper and lower punches and rotatably lowering the floating punch thereby pressing the molding having a tapered hole.
CONSTITUTION: A die 1 and a floating punch 5 are moved upward and a recess 12 of required depth closed with bottom face by a lower punch 3 is formed. Next, raw material powder (a) is packed in the recess 12 of the die 1. Thence, an upper punch 10 is lowered to compress the raw material powder (a) together with the lower punch 3. At the time, the lower punch 3 is lowered to a certain degree along the descending of the upper punch 10 and the floating punch 5 is also lowered while being rotated. Next, upon finishing of the compression, the die 1 is lowered until its top bottom becomes flush to the top surface of the lower punch 3. At the same time, the floating punch 5 is lowered down to the original position while being rotated circumferentially. Then, the convex part 7 at the top end of the punch 5 lowers diagonally by having an angle coinciding with the angle of its inclination, wereby a tapered hole 13 is formed on the under surface of the molding (a). After this, the upper punch 10 is moved upward and the molding (a') is taken out.
COPYRIGHT: (C)1981,JPO&Japio
JP15542879A 1979-11-30 1979-11-30 Production of press molding having tapered hole Pending JPS5677029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15542879A JPS5677029A (en) 1979-11-30 1979-11-30 Production of press molding having tapered hole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15542879A JPS5677029A (en) 1979-11-30 1979-11-30 Production of press molding having tapered hole

Publications (1)

Publication Number Publication Date
JPS5677029A true JPS5677029A (en) 1981-06-25

Family

ID=15605789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15542879A Pending JPS5677029A (en) 1979-11-30 1979-11-30 Production of press molding having tapered hole

Country Status (1)

Country Link
JP (1) JPS5677029A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099905A (en) * 1974-01-10 1975-08-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099905A (en) * 1974-01-10 1975-08-08

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