JPS57138927A - Resin changing method - Google Patents

Resin changing method

Info

Publication number
JPS57138927A
JPS57138927A JP56025169A JP2516981A JPS57138927A JP S57138927 A JPS57138927 A JP S57138927A JP 56025169 A JP56025169 A JP 56025169A JP 2516981 A JP2516981 A JP 2516981A JP S57138927 A JPS57138927 A JP S57138927A
Authority
JP
Japan
Prior art keywords
state
resin
injection
rotation
space
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
JP56025169A
Other languages
Japanese (ja)
Other versions
JPS6241450B2 (en
Inventor
Masayoshi Kasai
Kiyoshi Kinoshita
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP56025169A priority Critical patent/JPS57138927A/en
Publication of JPS57138927A publication Critical patent/JPS57138927A/en
Publication of JPS6241450B2 publication Critical patent/JPS6241450B2/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
    • B29C45/1753—Cleaning or purging, e.g. of the injection unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To perform cleaning at low cost and promptly, by making the high viscosity resin and the low viscosity resin act repeatedly on the retaining section of the screw tip part of an injection machine, etc.. CONSTITUTION:When the shutter 8 is opened at the starved state of the space g and the screw is rotated, unmelted pellets are sent forward without being melted and pellets reach fast to the position of the residual resin 2. Now, the space g becomes saturated state. Rotation of the screw and injection are repeated, then the resin acts on the surface of the retaining section b, d, e, f in relatively high viscosity state, so cleaning action is extremely large. Further, as rotation and injection are repeated, the melting position approaches gradually to the hopper 6 side, it becomes the melted state. Because the resin viscosity in the space g is low in this state, cleaning action is lowered. Here, the shutter 8 is closed and rotation and injection are performed, then, it returns againt to the original starved state.
JP56025169A 1981-02-23 1981-02-23 Resin changing method Granted JPS57138927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56025169A JPS57138927A (en) 1981-02-23 1981-02-23 Resin changing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56025169A JPS57138927A (en) 1981-02-23 1981-02-23 Resin changing method

Publications (2)

Publication Number Publication Date
JPS57138927A true JPS57138927A (en) 1982-08-27
JPS6241450B2 JPS6241450B2 (en) 1987-09-03

Family

ID=12158495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56025169A Granted JPS57138927A (en) 1981-02-23 1981-02-23 Resin changing method

Country Status (1)

Country Link
JP (1) JPS57138927A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112315A (en) * 1984-06-29 1986-01-20 Toyota Motor Corp Addition of colorant in injection molding
EP0419903A2 (en) * 1989-09-29 1991-04-03 Mitsubishi Jukogyo Kabushiki Kaisha Raw material resin feeding system for a molding machine
JP2018165033A (en) * 2017-03-28 2018-10-25 住友重機械工業株式会社 Injection molding machine and evaluation system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53101058A (en) * 1977-02-15 1978-09-04 Ube Ind Ltd Changeover of material and color in injection molding machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53101058A (en) * 1977-02-15 1978-09-04 Ube Ind Ltd Changeover of material and color in injection molding machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112315A (en) * 1984-06-29 1986-01-20 Toyota Motor Corp Addition of colorant in injection molding
JPH028565B2 (en) * 1984-06-29 1990-02-26 Toyota Jidosha Kk
EP0419903A2 (en) * 1989-09-29 1991-04-03 Mitsubishi Jukogyo Kabushiki Kaisha Raw material resin feeding system for a molding machine
JP2018165033A (en) * 2017-03-28 2018-10-25 住友重機械工業株式会社 Injection molding machine and evaluation system

Also Published As

Publication number Publication date
JPS6241450B2 (en) 1987-09-03

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