FR2217137A1 - Venting of mould cavities - via microscopic perforations made by laser drilling - Google Patents
Venting of mould cavities - via microscopic perforations made by laser drillingInfo
- 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- Withdrawn
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
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.
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)
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 |
-
1973
- 1973-02-15 FR FR7305396A patent/FR2217137A1/en not_active Withdrawn
Cited By (3)
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 |