FR2342149A1 - Tip and sleeve valve for screw of injection moulding machine - with an eccentric head to let the sleeve be removed over the tip - Google Patents

Tip and sleeve valve for screw of injection moulding machine - with an eccentric head to let the sleeve be removed over the tip

Info

Publication number
FR2342149A1
FR2342149A1 FR7605926A FR7605926A FR2342149A1 FR 2342149 A1 FR2342149 A1 FR 2342149A1 FR 7605926 A FR7605926 A FR 7605926A FR 7605926 A FR7605926 A FR 7605926A FR 2342149 A1 FR2342149 A1 FR 2342149A1
Authority
FR
France
Prior art keywords
tip
sleeve
screw
head
neck
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
FR7605926A
Other languages
French (fr)
Other versions
FR2342149B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7605926A priority Critical patent/FR2342149A1/en
Publication of FR2342149A1 publication Critical patent/FR2342149A1/en
Application granted granted Critical
Publication of FR2342149B1 publication Critical patent/FR2342149B1/fr
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
    • B29C45/46—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

Landscapes

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

Abstract

An extruder screw tip with an eccentric head and bevelled faces at each end of an integral neck for locating against a sleeve valve which is slightly shorter than the neck. Used esp. for injection moulding machines where reciprocation of the screw is used to fill the mould. The sleeve may be removed over the head of the tip by an axial shift when the screw is advanced sufficiently clear of the barrel, without needing to extract the screw completely and remove the sleeve over the screw root, yet the sleeve is captive when the head is in the barrel. Sleeves and/or heads can therefore be readily substd. to suit different melt characteristics or shot sizes. The melt has a clear peth past the shallow sides of the head, is less prone to blocking or delayed remelting than designs where the melt passes the head through drilled passages or surface channels. The tip is more robust than designs involving separate root, neck and head components coupled (screwed) together.
FR7605926A 1976-02-25 1976-02-25 Tip and sleeve valve for screw of injection moulding machine - with an eccentric head to let the sleeve be removed over the tip Granted FR2342149A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7605926A FR2342149A1 (en) 1976-02-25 1976-02-25 Tip and sleeve valve for screw of injection moulding machine - with an eccentric head to let the sleeve be removed over the tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7605926A FR2342149A1 (en) 1976-02-25 1976-02-25 Tip and sleeve valve for screw of injection moulding machine - with an eccentric head to let the sleeve be removed over the tip

Publications (2)

Publication Number Publication Date
FR2342149A1 true FR2342149A1 (en) 1977-09-23
FR2342149B1 FR2342149B1 (en) 1979-09-21

Family

ID=9169855

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7605926A Granted FR2342149A1 (en) 1976-02-25 1976-02-25 Tip and sleeve valve for screw of injection moulding machine - with an eccentric head to let the sleeve be removed over the tip

Country Status (1)

Country Link
FR (1) FR2342149A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530605A (en) * 1982-12-21 1985-07-23 Krauss-Maffei Aktiengesellschaft Check valve arrangement for the discharge end of an extruder, plastifier or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530605A (en) * 1982-12-21 1985-07-23 Krauss-Maffei Aktiengesellschaft Check valve arrangement for the discharge end of an extruder, plastifier or the like

Also Published As

Publication number Publication date
FR2342149B1 (en) 1979-09-21

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Legal Events

Date Code Title Description
ST Notification of lapse