Title:
PRESSING METHOD, PRESSING MECHANISM AND RESIN MOLDING APPARATUS
Document Type and Number:
Japanese Patent JP3408233
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pressing mechanism which reduces nonuniformity on the occasion of pressing an object, prevents pollution due to a hydraulic fluid and also enables attainment of miniaturization.
SOLUTION: The pressing mechanism is equipped with a hydraulic fluid source 2 wherein hydraulic fluid 1 is stored, a first sub-cylinder 4, a supply passage 3 making the hydraulic fluid source 2 and the first sub-cylinder 4 communicate with each other, a main cylinder 6 communicating with the hydraulic fluid source 2 through the intermediary of the supply passage 3 and a check valve 5, a main piston 18 provided inside the main cylinder 6, a discharge passage 7 making the main cylinder 6 and the hydraulic fluid source 2 communicate with each other, a supply control valve 22 and a discharge control valve 25 provided respectively for the supply passage 3 and the discharge passage 7, a first sub-piston 10 pressing the hydraulic fluid 1 in the first sub-cylinder 4, a pressing plate 11 pressing the first sub-piston 10, a second sub-cylinder 13, a second sub-piston 15 pressing the pressing plate 11 through the intermediary of the hydraulic fluid in the second sub-cylinder 13, and a first piezoelectric element 16 displacing the second sub-piston 15.
Inventors:
Akiyuki Harada
Katsuhisa Takehara
Katsuhisa Takehara
Application Number:
JP2000260678A
Publication Date:
May 19, 2003
Filing Date:
August 30, 2000
Export Citation:
Assignee:
towa corporation
International Classes:
B29C31/04; B29C43/02; B29C43/18; B29C43/34; B29C43/36; B29C45/02; B29C43/58; B29C45/14; B30B1/32; F15B3/00; F15B7/08; F15B11/12; B29L31/34; (IPC1-7): B29C43/18; B29C43/58; B29C45/02; B29C45/14; B30B1/32
Domestic Patent References:
| JP798004A | ||||
| JP2111039A | ||||
| JP2117997A | ||||
| JP5581100A | ||||
| JP60177897A |