JPS5684932A - Injection molding machine - Google Patents

Injection molding machine

Info

Publication number
JPS5684932A
JPS5684932A JP16108279A JP16108279A JPS5684932A JP S5684932 A JPS5684932 A JP S5684932A JP 16108279 A JP16108279 A JP 16108279A JP 16108279 A JP16108279 A JP 16108279A JP S5684932 A JPS5684932 A JP S5684932A
Authority
JP
Japan
Prior art keywords
pressure
cavity
predetermined
detector
time
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
JP16108279A
Other languages
Japanese (ja)
Other versions
JPS6330131B2 (en
Inventor
Yukio Inaguma
Mitsuru Asai
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.)
Toyota Central R&D Labs Inc
Original Assignee
Toyota Central R&D Labs Inc
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 Toyota Central R&D Labs Inc filed Critical Toyota Central R&D Labs Inc
Priority to JP16108279A priority Critical patent/JPS5684932A/en
Publication of JPS5684932A publication Critical patent/JPS5684932A/en
Publication of JPS6330131B2 publication Critical patent/JPS6330131B2/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

Abstract

PURPOSE:To make a thermal shrinkage of a molded form constant and improve the dimensional accuracy of the form by a method wherein a cavity pressure is kept at a predetermined set pressure and after a difference between a runner pressure and the cavity set pressure is arrived at a preset value, the form is cooled for a predetermined period of time. CONSTITUTION:A mold temperature is measured by a mold temperature detector 15 until the resin is filled into a cavity 2, then, the cavity set pressure is operated based on the signal of the detector 15 and a set cooling period of time is operated in accordance with an operating formula predetermined so that the product will show a predetermined dimensions. After the resin is filled into the mold, the cavity pressure is controlled under a constant value control by regulating the hydraulic pressure of a hydraulic cylinder 9 so that the cavity pressure detected by a cavity pressure detector 17 will become the previously operated cavity set pressure while this constant value control is continued until the pressure at the runner section 4 and the above-described cavity set pressure will show a predetermined pressure difference, thereafter, the hydraulic pressure is lowered and the product is withdrawn therefrom after it is cooled for the predetermined period of time.
JP16108279A 1979-12-12 1979-12-12 Injection molding machine Granted JPS5684932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16108279A JPS5684932A (en) 1979-12-12 1979-12-12 Injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16108279A JPS5684932A (en) 1979-12-12 1979-12-12 Injection molding machine

Publications (2)

Publication Number Publication Date
JPS5684932A true JPS5684932A (en) 1981-07-10
JPS6330131B2 JPS6330131B2 (en) 1988-06-16

Family

ID=15728273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16108279A Granted JPS5684932A (en) 1979-12-12 1979-12-12 Injection molding machine

Country Status (1)

Country Link
JP (1) JPS5684932A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076704A1 (en) * 2001-03-22 2002-10-03 Priamus System Technologies Ag Method for regulating the contraction of molded parts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076704A1 (en) * 2001-03-22 2002-10-03 Priamus System Technologies Ag Method for regulating the contraction of molded parts

Also Published As

Publication number Publication date
JPS6330131B2 (en) 1988-06-16

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