JPH04201225A - Method of controlling stroke of screw in injection molding machine - Google Patents

Method of controlling stroke of screw in injection molding machine

Info

Publication number
JPH04201225A
JPH04201225A JP33277890A JP33277890A JPH04201225A JP H04201225 A JPH04201225 A JP H04201225A JP 33277890 A JP33277890 A JP 33277890A JP 33277890 A JP33277890 A JP 33277890A JP H04201225 A JPH04201225 A JP H04201225A
Authority
JP
Japan
Prior art keywords
stroke
time
value
ppv
origin
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
JP33277890A
Other languages
Japanese (ja)
Other versions
JPH066319B2 (en
Inventor
Tomomitsu Fujita
Masaki Ogawa
Sumio Sato
Original Assignee
Niigata Eng Co Ltd
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 Niigata Eng Co Ltd filed Critical Niigata Eng Co Ltd
Priority to JP2332778A priority Critical patent/JPH066319B2/en
Publication of JPH04201225A publication Critical patent/JPH04201225A/en
Publication of JPH066319B2 publication Critical patent/JPH066319B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/52—Non-return devices

Abstract

PURPOSE: To keep the quantity of a resin injected into a mold constant, and to conduct high precision molding stably by detecting the time of closing in the projection process of a back-flow preventive mechanism by a resin pressure sensor, using the time as the origin of an injection stroke and controlling the stroke of a screw while employing the time as a reference.
CONSTITUTION: Resin pressure is detected by a pressure sensor 11, and input to a controller 13 as a digital value by an A/D converter 12. Current resin pressure Ppv and resin pressure Ppv' in preceding sampling are compared in a lowering stroke. A time when Ppv<Ppv' holds represents an inflection point (a back-flow preventive mechanism closing), and an injection-stroke (detected by an absolute encoder 8) current value at that time is latched, and used as an origin S0. A weighing-completion set value and the origin S0 detected are compared, the deviation section is subtracted from each variable-speed position set value and a V→P changeover position set value, and the stroke is controlled by the result of the arithmetic operation.
COPYRIGHT: (C)1992,JPO&Japio
JP2332778A 1990-11-29 1990-11-29 Stroke control method of screw in injection molding machine Expired - Lifetime JPH066319B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2332778A JPH066319B2 (en) 1990-11-29 1990-11-29 Stroke control method of screw in injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2332778A JPH066319B2 (en) 1990-11-29 1990-11-29 Stroke control method of screw in injection molding machine

Publications (2)

Publication Number Publication Date
JPH04201225A true JPH04201225A (en) 1992-07-22
JPH066319B2 JPH066319B2 (en) 1994-01-26

Family

ID=18258724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2332778A Expired - Lifetime JPH066319B2 (en) 1990-11-29 1990-11-29 Stroke control method of screw in injection molding machine

Country Status (1)

Country Link
JP (1) JPH066319B2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003106136A1 (en) * 2002-06-14 2003-12-24 Netstal-Maschinen Ag Method for injection-molding weight-accurate parts and corresponding injection molding machine
US7074028B2 (en) 2003-01-17 2006-07-11 Fanuc Ltd Injection molding machine having a freely rotatable screw
JP2008126533A (en) * 2006-11-21 2008-06-05 Nissei Plastics Ind Co Control method of injection molding machine
JP2008132686A (en) * 2006-11-29 2008-06-12 Nissei Plastics Ind Co Screw angle setting method of injection molding machine
JP2008132685A (en) * 2006-11-29 2008-06-12 Nissei Plastics Ind Co Control method of injection molding machine
EP2000280A1 (en) 2007-06-06 2008-12-10 Fanuc Ltd Injection molding machine and method for determining closure of check ring
EP2017060A1 (en) * 2007-07-19 2009-01-21 Fanuc Ltd Injection molding machine which carries out controlling of closing operation of a check ring
US7556753B2 (en) 2007-02-15 2009-07-07 Fanuc Ltd Method of indicating an open/close state of a check valve of an injection molding machine
US7654809B2 (en) 2006-12-20 2010-02-02 Fanuc Ltd Injection molding machine having a force peak time detecting device
US7871257B2 (en) 2007-02-15 2011-01-18 Fanuc Ltd Injection molding machine
CN104535309A (en) * 2014-12-17 2015-04-22 海天塑机集团有限公司 Test method for response time of injection molding screw non-return ring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076321A (en) * 1983-10-04 1985-04-30 Toshiba Mach Co Ltd Injection molding process
JPH0453720A (en) * 1990-06-22 1992-02-21 Japan Steel Works Ltd:The Method and apparatus for calculating back-flow stroke in injection device of injection molder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076321A (en) * 1983-10-04 1985-04-30 Toshiba Mach Co Ltd Injection molding process
JPH0453720A (en) * 1990-06-22 1992-02-21 Japan Steel Works Ltd:The Method and apparatus for calculating back-flow stroke in injection device of injection molder

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003106136A1 (en) * 2002-06-14 2003-12-24 Netstal-Maschinen Ag Method for injection-molding weight-accurate parts and corresponding injection molding machine
US7074028B2 (en) 2003-01-17 2006-07-11 Fanuc Ltd Injection molding machine having a freely rotatable screw
JP2008126533A (en) * 2006-11-21 2008-06-05 Nissei Plastics Ind Co Control method of injection molding machine
JP2008132686A (en) * 2006-11-29 2008-06-12 Nissei Plastics Ind Co Screw angle setting method of injection molding machine
JP2008132685A (en) * 2006-11-29 2008-06-12 Nissei Plastics Ind Co Control method of injection molding machine
JP4658908B2 (en) * 2006-11-29 2011-03-23 日精樹脂工業株式会社 Control method of injection molding machine
US7654809B2 (en) 2006-12-20 2010-02-02 Fanuc Ltd Injection molding machine having a force peak time detecting device
US7871257B2 (en) 2007-02-15 2011-01-18 Fanuc Ltd Injection molding machine
US7556753B2 (en) 2007-02-15 2009-07-07 Fanuc Ltd Method of indicating an open/close state of a check valve of an injection molding machine
EP2000280A1 (en) 2007-06-06 2008-12-10 Fanuc Ltd Injection molding machine and method for determining closure of check ring
US7980844B2 (en) 2007-06-06 2011-07-19 Fanuc Ltd Injection molding machine and method for determining closure of check ring
US7654810B2 (en) 2007-07-19 2010-02-02 Fanuc Ltd. Injection molding machine which carries out controlling of closing operation of a check ring
EP2017060A1 (en) * 2007-07-19 2009-01-21 Fanuc Ltd Injection molding machine which carries out controlling of closing operation of a check ring
CN104535309A (en) * 2014-12-17 2015-04-22 海天塑机集团有限公司 Test method for response time of injection molding screw non-return ring

Also Published As

Publication number Publication date
JPH066319B2 (en) 1994-01-26

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