CA2033646A1 - Energy-conserving injection molding machine - Google Patents

Energy-conserving injection molding machine

Info

Publication number
CA2033646A1
CA2033646A1 CA 2033646 CA2033646A CA2033646A1 CA 2033646 A1 CA2033646 A1 CA 2033646A1 CA 2033646 CA2033646 CA 2033646 CA 2033646 A CA2033646 A CA 2033646A CA 2033646 A1 CA2033646 A1 CA 2033646A1
Authority
CA
Canada
Prior art keywords
pump
motor
hydraulic
injection molding
molding machine
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
CA 2033646
Other languages
French (fr)
Other versions
CA2033646C (en
Inventor
Ronald A. Hertzer
Edward A. Chorey
Harold J. Faig
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.)
Milacron Inc
Original Assignee
Milacron 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 Milacron Inc filed Critical Milacron Inc
Publication of CA2033646A1 publication Critical patent/CA2033646A1/en
Application granted granted Critical
Publication of CA2033646C publication Critical patent/CA2033646C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A hydraulic injection molding machine incorporates a pump driven by a variable speed motor preferably of the brushless DC type. The machine controller outputs driving signals to adjust the speed of the motor so that the flow delivered by the pump substantially matches the hydraulic demand imposed during each phase of the machine operating cycle. The pump is preferably a variable displacement type and is connected to a fast responding pump control for selectively carrying out pressure compensation or flow compensation. The values of the motor driving signals are calculated so that the motor/pump combination is operated at or near maximum efficiency except when the pump control varies the displacement of the pump to effect pressure or flow compensation. Hydraulic transient response is further improved by connecting the output of the pump to an accumulator by way of a check valve.
CA 2033646 1990-01-19 1991-01-04 Energy-conserving injection molding machine Expired - Lifetime CA2033646C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46763490A 1990-01-19 1990-01-19
US467,634 1990-01-19

Publications (2)

Publication Number Publication Date
CA2033646A1 true CA2033646A1 (en) 1991-07-20
CA2033646C CA2033646C (en) 1995-07-18

Family

ID=23856486

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2033646 Expired - Lifetime CA2033646C (en) 1990-01-19 1991-01-04 Energy-conserving injection molding machine

Country Status (1)

Country Link
CA (1) CA2033646C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111941786A (en) * 2020-09-04 2020-11-17 宁波海洲机械有限公司 Single-cylinder precise servo injection molding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111941786A (en) * 2020-09-04 2020-11-17 宁波海洲机械有限公司 Single-cylinder precise servo injection molding machine

Also Published As

Publication number Publication date
CA2033646C (en) 1995-07-18

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202