JPS56105945A - Device for controlling injection speed of injection molding machine - Google Patents

Device for controlling injection speed of injection molding machine

Info

Publication number
JPS56105945A
JPS56105945A JP814480A JP814480A JPS56105945A JP S56105945 A JPS56105945 A JP S56105945A JP 814480 A JP814480 A JP 814480A JP 814480 A JP814480 A JP 814480A JP S56105945 A JPS56105945 A JP S56105945A
Authority
JP
Japan
Prior art keywords
speed
injection
screw
materials
detected
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
Application number
JP814480A
Other languages
Japanese (ja)
Other versions
JPS6410327B2 (en
Inventor
Kazumitsu Omori
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.)
Meiki Seisakusho KK
Original Assignee
Meiki Seisakusho 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 Meiki Seisakusho KK filed Critical Meiki Seisakusho KK
Priority to JP814480A priority Critical patent/JPS56105945A/en
Publication of JPS56105945A publication Critical patent/JPS56105945A/en
Publication of JPS6410327B2 publication Critical patent/JPS6410327B2/ja
Granted legal-status Critical Current

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)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To obtain a device for effectively controlling the injection speed by providing a closed loop oil pressure control circuit including a proportional electromagnetic flow control valve. CONSTITUTION:Materials are melted and mixed with one another by making a screw 3 rotate in a heating tube 1 and proceed by means of an injection cylinder 4 while feeding the tube with the materials from a hopper 2 and then the materials are injected into the cavity of a metal mold to mold them. At this time, a position of advance of the screw 3 is detected by a position detector 9 as variation of electric resistance. And the detected voltage is compared with what has been specified beforehand by comparators 11, 12. So that the comparators 11, 12 are actuated to excite relays 15, 16 if the voltage exceeds the prescribed limit. In addition, the speed of the screw 3 is detected by differentiating the output voltage of the position detector 9 by a differentiator 17, and that speed is compared with the standard speed that has been provided beforehand by a standard-speed-setting-device 18 to obtain the deviation, amplify it and so forth. By so doing, the injection speed can be controlled by controlling the amount of discharging oil into the injection cylinder 4 from pumps 41, 42.
JP814480A 1980-01-25 1980-01-25 Device for controlling injection speed of injection molding machine Granted JPS56105945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP814480A JPS56105945A (en) 1980-01-25 1980-01-25 Device for controlling injection speed of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP814480A JPS56105945A (en) 1980-01-25 1980-01-25 Device for controlling injection speed of injection molding machine

Publications (2)

Publication Number Publication Date
JPS56105945A true JPS56105945A (en) 1981-08-22
JPS6410327B2 JPS6410327B2 (en) 1989-02-21

Family

ID=11685104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP814480A Granted JPS56105945A (en) 1980-01-25 1980-01-25 Device for controlling injection speed of injection molding machine

Country Status (1)

Country Link
JP (1) JPS56105945A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60141222U (en) * 1984-02-29 1985-09-19 株式会社日本製鋼所 Hydraulic power source device for injection molding machine
JPS61222718A (en) * 1986-01-31 1986-10-03 Nissei Plastics Ind Co Injection control of electrically operated injection unit
JPH02142007U (en) * 1989-05-01 1990-11-30

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819897U (en) * 1971-07-19 1973-03-06
JPS52106079A (en) * 1976-03-02 1977-09-06 Teijin Ltd Controller
JPS5346360A (en) * 1976-10-08 1978-04-25 Mitsubishi Heavy Ind Ltd Method of controlling injection pressure of injection molding machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819897U (en) * 1971-07-19 1973-03-06
JPS52106079A (en) * 1976-03-02 1977-09-06 Teijin Ltd Controller
JPS5346360A (en) * 1976-10-08 1978-04-25 Mitsubishi Heavy Ind Ltd Method of controlling injection pressure of injection molding machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60141222U (en) * 1984-02-29 1985-09-19 株式会社日本製鋼所 Hydraulic power source device for injection molding machine
JPS61222718A (en) * 1986-01-31 1986-10-03 Nissei Plastics Ind Co Injection control of electrically operated injection unit
JPH0567410B2 (en) * 1986-01-31 1993-09-24 Nissei Plastics Ind Co
JPH02142007U (en) * 1989-05-01 1990-11-30

Also Published As

Publication number Publication date
JPS6410327B2 (en) 1989-02-21

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