JPS5757638A - Injection pressure control method - Google Patents
Injection pressure control methodInfo
- Publication number
- JPS5757638A JPS5757638A JP13347380A JP13347380A JPS5757638A JP S5757638 A JPS5757638 A JP S5757638A JP 13347380 A JP13347380 A JP 13347380A JP 13347380 A JP13347380 A JP 13347380A JP S5757638 A JPS5757638 A JP S5757638A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- relief valve
- electromagnetic
- valve
- resin
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
PURPOSE:To improve dimensional accuracy, by providing a relief valve and an electromagnetic changeover valve on a drain circuit of an injection cylinder, blocking a tank circuit of the electromagnetic valve when the operation was switched from charging process to pressure-holding process, operating the relief valve and preventing a screw from retracting. CONSTITUTION:An electromagnetic changeover valve 6 is provided on the drain side 2b of an ejecting circuit, and when it was switched from charging process to pressure-holding process a drain circuit is blocked at a position b, and hydraulic oil is made to work upon an electromagnetic relief valve 7. Resin pressure at the time of charging of a resin material storage section 10 located on the tip of a heating cylinder 5 is detected by a pressure detecting device 9, and on the basis of thus detected value a pressure which is not smaller than the detected resin pressure is calculated for setting an injection pressure controlling electromagnetic proportional relief valve 1 by a signal emitter 11, and it is made to work upon the relief valve 1 as an electrical signal. A pressure-maintaining force F to be varied by forming resin and other operating conditions is set by a pressure setting unit 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13347380A JPS5757638A (en) | 1980-09-25 | 1980-09-25 | Injection pressure control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13347380A JPS5757638A (en) | 1980-09-25 | 1980-09-25 | Injection pressure control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5757638A true JPS5757638A (en) | 1982-04-06 |
JPS6134371B2 JPS6134371B2 (en) | 1986-08-07 |
Family
ID=15105592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13347380A Granted JPS5757638A (en) | 1980-09-25 | 1980-09-25 | Injection pressure control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5757638A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3501846A1 (en) * | 1984-01-23 | 1985-08-01 | Toshiba Kikai K.K., Tokio/Tokyo | Process for controlling the injection moulding process of an injection moulding machine and device for carrying out the process |
JPS63163920U (en) * | 1987-04-15 | 1988-10-26 | ||
JPS6414016A (en) * | 1987-07-08 | 1989-01-18 | Toshiba Machine Co Ltd | Method for changeover control of dwelling pressure and device therefor |
CN104797397A (en) * | 2012-08-24 | 2015-07-22 | 圣万提注塑工业(苏州)有限公司 | Injection molding flow control apparatus and method |
-
1980
- 1980-09-25 JP JP13347380A patent/JPS5757638A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3501846A1 (en) * | 1984-01-23 | 1985-08-01 | Toshiba Kikai K.K., Tokio/Tokyo | Process for controlling the injection moulding process of an injection moulding machine and device for carrying out the process |
JPS63163920U (en) * | 1987-04-15 | 1988-10-26 | ||
JPS6414016A (en) * | 1987-07-08 | 1989-01-18 | Toshiba Machine Co Ltd | Method for changeover control of dwelling pressure and device therefor |
CN104797397A (en) * | 2012-08-24 | 2015-07-22 | 圣万提注塑工业(苏州)有限公司 | Injection molding flow control apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
JPS6134371B2 (en) | 1986-08-07 |
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