FR2386411A1 - Injection moulding thick thermoplastic sections in thin walled stages - using ribbed cavity inserts and successive over-moulding - Google Patents

Injection moulding thick thermoplastic sections in thin walled stages - using ribbed cavity inserts and successive over-moulding

Info

Publication number
FR2386411A1
FR2386411A1 FR7710082A FR7710082A FR2386411A1 FR 2386411 A1 FR2386411 A1 FR 2386411A1 FR 7710082 A FR7710082 A FR 7710082A FR 7710082 A FR7710082 A FR 7710082A FR 2386411 A1 FR2386411 A1 FR 2386411A1
Authority
FR
France
Prior art keywords
moulding
stages
thin walled
cavity inserts
thick thermoplastic
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
FR7710082A
Other languages
French (fr)
Other versions
FR2386411B1 (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.)
REYDEL ANC ETS
Original Assignee
REYDEL ANC ETS
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 REYDEL ANC ETS filed Critical REYDEL ANC ETS
Priority to FR7710082A priority Critical patent/FR2386411A1/en
Publication of FR2386411A1 publication Critical patent/FR2386411A1/en
Application granted granted Critical
Publication of FR2386411B1 publication Critical patent/FR2386411B1/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
    • B29C45/16—Making multilayered or multicoloured articles
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C2045/1682—Making multilayered or multicoloured articles preventing defects

Abstract

Large components are injection moulded in stages using two or more moulds successively with inserts which subdivide the mould form into segments comprised of complementary thin-walled sub-components. Moulding of a gear leverl knob in two or three stages is illustrated. Used for moulding thermoplastic forms into shapes which would distort or rupture (internally) due to differential cooling and shrinkage if moulded as a thick section. The thin moulding sections may be cooled relatively efficiently, e.g. due to conduction to adjacent tool faces, so that the cumulative moulding cycle is shorter than that required for a thick one-piece moulding to become stable.
FR7710082A 1977-04-04 1977-04-04 Injection moulding thick thermoplastic sections in thin walled stages - using ribbed cavity inserts and successive over-moulding Granted FR2386411A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7710082A FR2386411A1 (en) 1977-04-04 1977-04-04 Injection moulding thick thermoplastic sections in thin walled stages - using ribbed cavity inserts and successive over-moulding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7710082A FR2386411A1 (en) 1977-04-04 1977-04-04 Injection moulding thick thermoplastic sections in thin walled stages - using ribbed cavity inserts and successive over-moulding

Publications (2)

Publication Number Publication Date
FR2386411A1 true FR2386411A1 (en) 1978-11-03
FR2386411B1 FR2386411B1 (en) 1980-02-08

Family

ID=9188974

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7710082A Granted FR2386411A1 (en) 1977-04-04 1977-04-04 Injection moulding thick thermoplastic sections in thin walled stages - using ribbed cavity inserts and successive over-moulding

Country Status (1)

Country Link
FR (1) FR2386411A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266900A2 (en) * 1986-10-04 1988-05-11 Minnesota Mining And Manufacturing Company Method and apparatus for manufacturing stress-controlling resilient enclosures for electrical medium and high voltage connectors
US4959188A (en) * 1988-04-04 1990-09-25 Automotive Products Plc Method for forming a hydraulic cylinder assembly
EP0673743A1 (en) * 1994-03-12 1995-09-27 Krauss-Maffei Aktiengesellschaft Method for manufacturing thick-walled plastic articles
WO2012127200A1 (en) * 2011-03-23 2012-09-27 Deuy (Ireland) Manufacturing method and product
EP2531345A4 (en) * 2010-02-01 2015-05-27 Dbm Reflex Entpr Inc Thick lens molded with embedded layers of the same resin using a two step injection molding process.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266900A2 (en) * 1986-10-04 1988-05-11 Minnesota Mining And Manufacturing Company Method and apparatus for manufacturing stress-controlling resilient enclosures for electrical medium and high voltage connectors
EP0266900A3 (en) * 1986-10-04 1989-07-12 Minnesota Mining And Manufacturing Company Method and apparatus for manufacturing stress-controlling resilient enclosures for electrical medium and high voltage connectors
US4959188A (en) * 1988-04-04 1990-09-25 Automotive Products Plc Method for forming a hydraulic cylinder assembly
EP0673743A1 (en) * 1994-03-12 1995-09-27 Krauss-Maffei Aktiengesellschaft Method for manufacturing thick-walled plastic articles
EP2531345A4 (en) * 2010-02-01 2015-05-27 Dbm Reflex Entpr Inc Thick lens molded with embedded layers of the same resin using a two step injection molding process.
WO2012127200A1 (en) * 2011-03-23 2012-09-27 Deuy (Ireland) Manufacturing method and product

Also Published As

Publication number Publication date
FR2386411B1 (en) 1980-02-08

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Legal Events

Date Code Title Description
ST Notification of lapse