JPS5639129A - Manufacture of doorknob - Google Patents
Manufacture of doorknobInfo
- Publication number
- JPS5639129A JPS5639129A JP11453979A JP11453979A JPS5639129A JP S5639129 A JPS5639129 A JP S5639129A JP 11453979 A JP11453979 A JP 11453979A JP 11453979 A JP11453979 A JP 11453979A JP S5639129 A JPS5639129 A JP S5639129A
- Authority
- JP
- Japan
- Prior art keywords
- knob
- die
- liquid
- forming
- male die
- 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
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
PURPOSE: To hydraulically tight press the knob to the forming die, and to easily manufacture the seamless, durable and beautiful doorknob, by setting the semifinished hollow knob in the forming die, by filling up the inside of the knob with the liquid, and by forcibly pushing the male die into the knob.
CONSTITUTION: The semifinished hollow knob 2 is set in the lower die 1' and the liquid like as water, etc., is poured into the knob 2 to full. Next, the downward facing upper die 1" is put on the lower die 1', and a little later, the male die 3 is forcibly pushed into the knob 2. Hereby, the liquid pressure in the knob 2 is increased, and the knob 2 is tight pressed to the inner surface of the forming die 1 and is formed into the arbitrary pattern and shape. After finishing the forming work, the male die 3 is pulled up, and the upper die 1" is lifted up. When the male die 1" is lifted up, the inner pressure of the knob 2 becomes negative, so that the obturating element 6' works against the spring 5 and opens the valve port 4'; as a result, the air is introduced into the knob 2 through the air path 4 and the product's deformation due to the negative inner pressure is prevented.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11453979A JPS5639129A (en) | 1979-09-06 | 1979-09-06 | Manufacture of doorknob |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11453979A JPS5639129A (en) | 1979-09-06 | 1979-09-06 | Manufacture of doorknob |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5639129A true JPS5639129A (en) | 1981-04-14 |
Family
ID=14640283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11453979A Pending JPS5639129A (en) | 1979-09-06 | 1979-09-06 | Manufacture of doorknob |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5639129A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100313660B1 (en) * | 1998-08-03 | 2002-02-28 | 명 오 김 | Molding method of integrated door lock handle |
-
1979
- 1979-09-06 JP JP11453979A patent/JPS5639129A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100313660B1 (en) * | 1998-08-03 | 2002-02-28 | 명 오 김 | Molding method of integrated door lock handle |
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