WO1997049537A1 - Verfahren zum abtrennen des angusses von einem spritzgiessteil - Google Patents
Verfahren zum abtrennen des angusses von einem spritzgiessteil Download PDFInfo
- Publication number
- WO1997049537A1 WO1997049537A1 PCT/EP1997/003313 EP9703313W WO9749537A1 WO 1997049537 A1 WO1997049537 A1 WO 1997049537A1 EP 9703313 W EP9703313 W EP 9703313W WO 9749537 A1 WO9749537 A1 WO 9749537A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sprue
- opening
- injection molding
- separating
- molded part
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
- G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
- G11B23/0028—Details
- G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/02—Deburring or deflashing
-
- 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
- B29C45/38—Cutting-off equipment for sprues or ingates
- B29C45/382—Cutting-off equipment for sprues or ingates disposed outside the mould
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0838—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2017/00—Carriers for sound or information
- B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
- B29L2017/003—Records or discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Definitions
- the invention relates to a method for separating the sprue from an injection molding according to the preamble of claim 1.
- the separation and removal of the casting from an information carrier disk is known.
- the injection molding tool used here is designed so that if the entire injection molding is designed appropriately, the sprue inside the mold can be separated by tearing after the injection molding process and then removed from the mold.
- the processes for the punching tool are similar.
- the sprue is separated from the injection molding by punching and, after the mold has been opened, it is removed by a removal device.
- the invention is therefore based on the object of an injection molded part such as a highly sensitive information carrier disc, e.g. a CD to remove the sprue part dust-free with little mechanical effort.
- a highly sensitive information carrier disc e.g. a CD
- the precise cutting edge of a laser also enables the injection gap between the sprue and the molded part to be enlarged. This results in a better and faster influence on the molded part quality, namely
- the position of the disk-shaped sprue in the opening area can thus be chosen freely, ie the connection of the sprue part to the CD can take place on the mirror side, in the middle area or on the information side.
- the sprue part is arranged in the center area, it can advantageously be separated by means of a laser in such a way that no burrs can occur on the surfaces of the pane and only a minimal depression or groove is produced by the laser in the center of the opening, which groove corresponds to the required exact cent ⁇ ration of the disc has no harmful influence.
- Another advantage of the method according to the invention results with regard to the application of paint to the data carrier. If the sprue part is arranged on the information side, the information side of the data carrier can be made absolutely flat. This makes it possible to apply the paint centrally, with optimum paint distribution.
- a data carrier 1 and a sprue part 2 with a connection to the mirror side 3 and an opening 20 as well as a stacking bead 4 and a hot runner attachment 5.
- lasers 6 and 7 are arranged for the separation of the sprue part 2,
- Fig. 3 shows a data carrier 14 and sprue 15 in an opening
- Fig. 4 shows the enlarged partial cross section of an injection molded part
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97929280A EP0912315A1 (de) | 1996-06-27 | 1997-06-24 | Verfahren zum abtrennen des angusses von einem spritzgiessteil |
| JP10502347A JP2000512576A (ja) | 1996-06-27 | 1997-06-24 | 射出成形品からスプルーを分離する方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19625717A DE19625717A1 (de) | 1996-06-27 | 1996-06-27 | Verfahren zum Abtrennen des Angusses von einem Spritzgießteil |
| DE19625717.4 | 1996-06-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997049537A1 true WO1997049537A1 (de) | 1997-12-31 |
| WO1997049537A9 WO1997049537A9 (de) | 1998-03-26 |
Family
ID=7798157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1997/003313 Ceased WO1997049537A1 (de) | 1996-06-27 | 1997-06-24 | Verfahren zum abtrennen des angusses von einem spritzgiessteil |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0912315A1 (de) |
| JP (1) | JP2000512576A (de) |
| CA (1) | CA2256741A1 (de) |
| DE (1) | DE19625717A1 (de) |
| WO (1) | WO1997049537A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19842899C2 (de) * | 1998-09-18 | 2002-04-25 | Roehm Gmbh | Formwerkzeug für Informationsträgerscheiben-Rohlinge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3526632A1 (de) * | 1985-07-25 | 1987-02-05 | Krauss Maffei Ag | Verfahren und vorrichtung zum herstellen eines spritzgiessteils |
| JPS63203308A (ja) * | 1987-02-20 | 1988-08-23 | Daicel Chem Ind Ltd | デイスクに中心孔を明ける方法 |
| JPS6453788A (en) * | 1987-08-20 | 1989-03-01 | Seidensha Electronics | Laser beam cutting method for digital disk |
| JPH0341642A (ja) * | 1989-07-10 | 1991-02-22 | Canon Inc | 光記録媒体の製造法 |
| WO1995021444A1 (de) * | 1994-02-02 | 1995-08-10 | Warner Music Manufacturing Europe Gmbh | VERFAHREN ZUM EINBRINGEN VON MITTELLÖCHERN IN CDs |
| JPH07276508A (ja) * | 1994-04-05 | 1995-10-24 | Shinozaki Seisakusho:Kk | 高分子樹脂材への細孔加工方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4535223A (en) * | 1983-10-24 | 1985-08-13 | Rca Corporation | Apparatus for use in trimming molded records |
-
1996
- 1996-06-27 DE DE19625717A patent/DE19625717A1/de not_active Withdrawn
-
1997
- 1997-06-24 JP JP10502347A patent/JP2000512576A/ja active Pending
- 1997-06-24 EP EP97929280A patent/EP0912315A1/de not_active Withdrawn
- 1997-06-24 WO PCT/EP1997/003313 patent/WO1997049537A1/de not_active Ceased
- 1997-06-24 CA CA002256741A patent/CA2256741A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3526632A1 (de) * | 1985-07-25 | 1987-02-05 | Krauss Maffei Ag | Verfahren und vorrichtung zum herstellen eines spritzgiessteils |
| JPS63203308A (ja) * | 1987-02-20 | 1988-08-23 | Daicel Chem Ind Ltd | デイスクに中心孔を明ける方法 |
| JPS6453788A (en) * | 1987-08-20 | 1989-03-01 | Seidensha Electronics | Laser beam cutting method for digital disk |
| JPH0341642A (ja) * | 1989-07-10 | 1991-02-22 | Canon Inc | 光記録媒体の製造法 |
| WO1995021444A1 (de) * | 1994-02-02 | 1995-08-10 | Warner Music Manufacturing Europe Gmbh | VERFAHREN ZUM EINBRINGEN VON MITTELLÖCHERN IN CDs |
| JPH07276508A (ja) * | 1994-04-05 | 1995-10-24 | Shinozaki Seisakusho:Kk | 高分子樹脂材への細孔加工方法 |
Non-Patent Citations (4)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 012, no. 484 (M - 776) 16 December 1988 (1988-12-16) * |
| PATENT ABSTRACTS OF JAPAN vol. 013, no. 244 (M - 834) 7 June 1989 (1989-06-07) * |
| PATENT ABSTRACTS OF JAPAN vol. 015, no. 184 (P - 1200) 13 May 1991 (1991-05-13) * |
| PATENT ABSTRACTS OF JAPAN vol. 096, no. 002 29 February 1996 (1996-02-29) * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0912315A1 (de) | 1999-05-06 |
| DE19625717A1 (de) | 1998-01-02 |
| CA2256741A1 (en) | 1997-12-31 |
| JP2000512576A (ja) | 2000-09-26 |
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