FR2079725A5 - Injection moulding gramophone records - by filling the mould before closure - Google Patents

Injection moulding gramophone records - by filling the mould before closure

Info

Publication number
FR2079725A5
FR2079725A5 FR7004744A FR7004744A FR2079725A5 FR 2079725 A5 FR2079725 A5 FR 2079725A5 FR 7004744 A FR7004744 A FR 7004744A FR 7004744 A FR7004744 A FR 7004744A FR 2079725 A5 FR2079725 A5 FR 2079725A5
Authority
FR
France
Prior art keywords
mould
platen
closure
injection moulding
mould before
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.)
Expired
Application number
FR7004744A
Other languages
French (fr)
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.)
MATERIEL APPL PLASTIQUES
Original Assignee
MATERIEL APPL PLASTIQUES
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 MATERIEL APPL PLASTIQUES filed Critical MATERIEL APPL PLASTIQUES
Priority to FR7004744A priority Critical patent/FR2079725A5/en
Application granted granted Critical
Publication of FR2079725A5 publication Critical patent/FR2079725A5/en
Expired 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding

Landscapes

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

Abstract

Injection moulding press has two parallel platens carrying the mould halves, one platen being fixed and the other movable, the fixed platen being provided with injectors. The material to be moulded is injected into the interior of the mould before it is completely closed, and a strong pressure is applied to the movable platen to complete the mould closure and compress the moulding material. The movable platen pref. comprises two parts - the piston and the cylinder of a hydraulic jack with a short stroke, one of them carrying the mould while the other is attached to the drive of the platen which permits only a partial closure of the mould, complete closure and compression being brought about by the hydraulic jack. Injection of the material into the mould before complete closure and compression ensures a homogeneous, accurate moulding.
FR7004744A 1970-02-11 1970-02-11 Injection moulding gramophone records - by filling the mould before closure Expired FR2079725A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7004744A FR2079725A5 (en) 1970-02-11 1970-02-11 Injection moulding gramophone records - by filling the mould before closure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7004744A FR2079725A5 (en) 1970-02-11 1970-02-11 Injection moulding gramophone records - by filling the mould before closure

Publications (1)

Publication Number Publication Date
FR2079725A5 true FR2079725A5 (en) 1971-11-12

Family

ID=9050413

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7004744A Expired FR2079725A5 (en) 1970-02-11 1970-02-11 Injection moulding gramophone records - by filling the mould before closure

Country Status (1)

Country Link
FR (1) FR2079725A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130620A (en) * 1973-10-15 1978-12-19 Mca Disco-Vision, Inc. Method for making video discs and video disc molds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130620A (en) * 1973-10-15 1978-12-19 Mca Disco-Vision, Inc. Method for making video discs and video disc molds

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Legal Events

Date Code Title Description
ST Notification of lapse