FR2252200A1 - Press tool for moulding thermoplastic record discs - with cellular tool wall zone to assist rapid heat transfer swings - Google Patents
Press tool for moulding thermoplastic record discs - with cellular tool wall zone to assist rapid heat transfer swingsInfo
- Publication number
- FR2252200A1 FR2252200A1 FR7438239A FR7438239A FR2252200A1 FR 2252200 A1 FR2252200 A1 FR 2252200A1 FR 7438239 A FR7438239 A FR 7438239A FR 7438239 A FR7438239 A FR 7438239A FR 2252200 A1 FR2252200 A1 FR 2252200A1
- Authority
- FR
- France
- Prior art keywords
- tool
- heat transfer
- swings
- cellular
- face
- 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- Withdrawn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
- 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
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
- B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
-
- 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
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
-
- 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)
- Press Drives And Press Lines (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Press tool where one face of a shallow cavity comprises a flexible diaphragm backed by an annular recess for radial flow of a heat transfer fluid supplied alternately at high and low temps via a parallel recess distributing the fluid from a central chamber to the periphery of the annular recess, where the secondary recess is backed by a section of tool wall of cellular structure with an impermeable cover. Esp. for moulding replicate thermoplastic discs of e.g. a video recording signal profile on the exposed face of the diaphragm. The cellular structure reduces the heat capacity of the tool body adjacent to the fluid passages, thus allowing a more rapid temp. swing between hot and cold flows to the tool face.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5430273 | 1973-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2252200A1 true FR2252200A1 (en) | 1975-06-20 |
Family
ID=10470570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7438239A Withdrawn FR2252200A1 (en) | 1973-11-22 | 1974-11-21 | Press tool for moulding thermoplastic record discs - with cellular tool wall zone to assist rapid heat transfer swings |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU7531874A (en) |
BE (1) | BE822471A (en) |
DE (1) | DE2455225A1 (en) |
FR (1) | FR2252200A1 (en) |
NL (1) | NL7415193A (en) |
SE (1) | SE7414638L (en) |
-
1974
- 1974-11-13 AU AU75318/74A patent/AU7531874A/en not_active Expired
- 1974-11-21 DE DE19742455225 patent/DE2455225A1/en active Pending
- 1974-11-21 FR FR7438239A patent/FR2252200A1/en not_active Withdrawn
- 1974-11-21 NL NL7415193A patent/NL7415193A/en unknown
- 1974-11-21 SE SE7414638A patent/SE7414638L/xx unknown
- 1974-11-21 BE BE150745A patent/BE822471A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE2455225A1 (en) | 1975-05-28 |
SE7414638L (en) | 1975-05-23 |
AU7531874A (en) | 1976-05-13 |
NL7415193A (en) | 1975-05-26 |
BE822471A (en) | 1975-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |