FR2217137A1 - Venting of mould cavities - via microscopic perforations made by laser drilling - Google Patents

Venting of mould cavities - via microscopic perforations made by laser drilling

Info

Publication number
FR2217137A1
FR2217137A1 FR7305396A FR7305396A FR2217137A1 FR 2217137 A1 FR2217137 A1 FR 2217137A1 FR 7305396 A FR7305396 A FR 7305396A FR 7305396 A FR7305396 A FR 7305396A FR 2217137 A1 FR2217137 A1 FR 2217137A1
Authority
FR
France
Prior art keywords
mould cavities
venting
laser drilling
perforations made
microscopic perforations
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.)
Withdrawn
Application number
FR7305396A
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.)
BIOTTEAU GERARD FR
Original Assignee
BIOTTEAU GERARD FR
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 BIOTTEAU GERARD FR filed Critical BIOTTEAU GERARD FR
Priority to FR7305396A priority Critical patent/FR2217137A1/en
Publication of FR2217137A1 publication Critical patent/FR2217137A1/en
Withdrawn legal-status Critical Current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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
    • 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
    • B29C45/26—Moulds
    • B29C45/34—Moulds having venting means
    • B29C45/345—Moulds having venting means using a porous mould wall or a part thereof, e.g. made of sintered metal

Abstract

Mould cavities with recesses comprising potential air traps remote from the parting line where the recess walls are made porous by multiple microscopic perforations made by laser beams. During injection the outlet ends of the microbore vents may be subjected to vacuum by a suction hood. The holes allow air removal without risk of penetration by the more viscous moulding material.
FR7305396A 1973-02-15 1973-02-15 Venting of mould cavities - via microscopic perforations made by laser drilling Withdrawn FR2217137A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7305396A FR2217137A1 (en) 1973-02-15 1973-02-15 Venting of mould cavities - via microscopic perforations made by laser drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7305396A FR2217137A1 (en) 1973-02-15 1973-02-15 Venting of mould cavities - via microscopic perforations made by laser drilling

Publications (1)

Publication Number Publication Date
FR2217137A1 true FR2217137A1 (en) 1974-09-06

Family

ID=9114895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7305396A Withdrawn FR2217137A1 (en) 1973-02-15 1973-02-15 Venting of mould cavities - via microscopic perforations made by laser drilling

Country Status (1)

Country Link
FR (1) FR2217137A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0661121A1 (en) * 1993-12-28 1995-07-05 CARL AUG. PICARD GMBH & CO. KG. Lining plate for moulding chambers
EP0979718A1 (en) * 1998-08-06 2000-02-16 Franz Sterner Method for producing injection moulded articles and injection mould for carrying out the method
WO2004067256A1 (en) * 2003-01-31 2004-08-12 Braun Gmbh Deaerating aid for an injection moulding tool and method for producing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0661121A1 (en) * 1993-12-28 1995-07-05 CARL AUG. PICARD GMBH & CO. KG. Lining plate for moulding chambers
EP0979718A1 (en) * 1998-08-06 2000-02-16 Franz Sterner Method for producing injection moulded articles and injection mould for carrying out the method
WO2004067256A1 (en) * 2003-01-31 2004-08-12 Braun Gmbh Deaerating aid for an injection moulding tool and method for producing the same

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Legal Events

Date Code Title Description
ST Notification of lapse