JPS5677029A - Production of press molding having tapered hole - Google Patents
Production of press molding having tapered holeInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5099905A (en) * | 1974-01-10 | 1975-08-08 |
-
1979
- 1979-11-30 JP JP15542879A patent/JPS5677029A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5099905A (en) * | 1974-01-10 | 1975-08-08 |
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