JPS5639129A - Manufacture of doorknob - Google Patents

Manufacture of doorknob

Info

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
Application number
JP11453979A
Other languages
Japanese (ja)
Inventor
Taiichi Masabayashi
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.)
SHIYOUEI PRESS KOGYO KK
SHOEI PRESS KOGYO KK
Original Assignee
SHIYOUEI PRESS KOGYO KK
SHOEI PRESS KOGYO KK
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 SHIYOUEI PRESS KOGYO KK, SHOEI PRESS KOGYO KK filed Critical SHIYOUEI PRESS KOGYO KK
Priority to JP11453979A priority Critical patent/JPS5639129A/en
Publication of JPS5639129A publication Critical patent/JPS5639129A/en
Pending legal-status Critical Current

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
JP11453979A 1979-09-06 1979-09-06 Manufacture of doorknob Pending JPS5639129A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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