GB815388A - Improvements in or relating to apparatus for moulding gramophone disc records - Google Patents
Improvements in or relating to apparatus for moulding gramophone disc recordsInfo
- Publication number
- GB815388A GB815388A GB2374056A GB2374056A GB815388A GB 815388 A GB815388 A GB 815388A GB 2374056 A GB2374056 A GB 2374056A GB 2374056 A GB2374056 A GB 2374056A GB 815388 A GB815388 A GB 815388A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bolster
- platform
- relating
- moulding
- thermal conductivity
- 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
Links
- 238000000465 moulding Methods 0.000 title abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 210000003027 Ear, Inner Anatomy 0.000 abstract 1
- 229910000760 Hardened steel Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 1
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Each die of a gramophone disc record moulding press is made in two parts, a bolster and a platform, the bolster being made from metal having a low thermal conductivity and the platform from a metal of high thermal conductivity. Suitable metals are hardened steel and cupra-nickel respectively. The two parts are bolted together and may include sealing rings, e.g. of silicone material, between them. The platforms, which are next the records during moulding, may be formed with labyrinths for the circulation of heating or cooling fluid. A shroud may project from the surface of the lower bolster and partly surround the lower platform, leaving a suitable expansion gap.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB815388A true GB815388A (en) | 1959-06-24 |
Family
ID=1737889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2374056A Expired GB815388A (en) | 1956-08-01 | Improvements in or relating to apparatus for moulding gramophone disc records |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB815388A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0168530A1 (en) * | 1984-07-05 | 1986-01-22 | Docdata N.V. | Method and apparatus for reproducing relief structures onto a substrate |
| NL9002131A (en) * | 1977-10-31 | 1991-05-01 | Mca Disco Vision | Injection moulding tool for video recording discs - avoids eccentric or birefringence interference with reflected laser signals |
| DE4325481A1 (en) * | 1993-07-29 | 1995-02-02 | Innova Zug Ag | Process for the production of molded articles |
-
1956
- 1956-08-01 GB GB2374056A patent/GB815388A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9002131A (en) * | 1977-10-31 | 1991-05-01 | Mca Disco Vision | Injection moulding tool for video recording discs - avoids eccentric or birefringence interference with reflected laser signals |
| EP0168530A1 (en) * | 1984-07-05 | 1986-01-22 | Docdata N.V. | Method and apparatus for reproducing relief structures onto a substrate |
| DE4325481A1 (en) * | 1993-07-29 | 1995-02-02 | Innova Zug Ag | Process for the production of molded articles |
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