GB828685A - Improvements relating to the moulding of thermoplastic articles - Google Patents
Improvements relating to the moulding of thermoplastic articlesInfo
- Publication number
- GB828685A GB828685A GB2817455A GB2817455A GB828685A GB 828685 A GB828685 A GB 828685A GB 2817455 A GB2817455 A GB 2817455A GB 2817455 A GB2817455 A GB 2817455A GB 828685 A GB828685 A GB 828685A
- Authority
- GB
- United Kingdom
- Prior art keywords
- moulding
- article
- core
- metal
- bolt
- 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
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
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores
-
- 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
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
-
- 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
- B29C45/2681—Moulds with rotatable mould parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
828,685. Injection-moulding. COLE Ltd., E. K., TERRY, B. E., and GLANVILL, A. B. Jan. 4, 1957 [Oct. 4, 1955], No. 28174/55. Class 87(2). A method of moulding a thermoplastic article with " undercut " contours comprises utilising a member of fusible metal in the moulding operation and, after moulding melting the member by heating it to a temperature insufficient to deform the moulded article. Due to the heat conductivity of the fusible metal member moulding is effected before the metal reaches its melting point. Suitable metals are said to be Wood's metal, melting point 60 ' 5‹C., or " Cerrobend " (Registered Trade Mark), melting point 70‹C. An injection mould for a polythene article 8 comprises an upper plate 1 with injection sprue 7, a hollow centre plate 2 and a lower plate 3 having recess to locate a bolt 5 carrying a fusible metal core 6. After moulding the article 8 and core 6 is held stationary and the bolt 5 is rotated to unscrew the article and core. The core 6 and bolt 5 may both be of fusible metal when moulding small articles.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2817455A GB828685A (en) | 1955-10-04 | 1955-10-04 | Improvements relating to the moulding of thermoplastic articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2817455A GB828685A (en) | 1955-10-04 | 1955-10-04 | Improvements relating to the moulding of thermoplastic articles |
Publications (1)
Publication Number | Publication Date |
---|---|
GB828685A true GB828685A (en) | 1960-02-24 |
Family
ID=10271460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2817455A Expired GB828685A (en) | 1955-10-04 | 1955-10-04 | Improvements relating to the moulding of thermoplastic articles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB828685A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2427188A1 (en) * | 1978-05-31 | 1979-12-28 | Nitto Electric Ind Co | PROCESS FOR PRODUCING A MOLDED PLASTIC ARTICLE CONTAINING A HOLLOW PORTION OF COMPLICATED SHAPE |
DE2908872A1 (en) * | 1978-03-07 | 1980-01-31 | Dunlop Ltd | PLAY RACKET AND METHOD FOR THE PRODUCTION THEREOF |
EP0138985A1 (en) * | 1983-03-28 | 1985-05-02 | Park Chemical Company | Pressure molding process using salt cores and a composition for making cores |
EP0178093A1 (en) * | 1984-09-28 | 1986-04-16 | Fry's Metals Limited | An improved metal core for use in plastics moulding |
US4747598A (en) * | 1984-07-17 | 1988-05-31 | Dunlop Limited A British Company | Racket frame having interiorly located stringing lugs |
US20120228801A1 (en) * | 2011-03-11 | 2012-09-13 | Wang Xiangji | Injection method for hollow products, its fusible core and the method for making the fusible core thereof |
-
1955
- 1955-10-04 GB GB2817455A patent/GB828685A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2908872A1 (en) * | 1978-03-07 | 1980-01-31 | Dunlop Ltd | PLAY RACKET AND METHOD FOR THE PRODUCTION THEREOF |
US4440392A (en) * | 1978-03-07 | 1984-04-03 | Dunlop Limited | One piece molded games racket |
FR2427188A1 (en) * | 1978-05-31 | 1979-12-28 | Nitto Electric Ind Co | PROCESS FOR PRODUCING A MOLDED PLASTIC ARTICLE CONTAINING A HOLLOW PORTION OF COMPLICATED SHAPE |
EP0138985A1 (en) * | 1983-03-28 | 1985-05-02 | Park Chemical Company | Pressure molding process using salt cores and a composition for making cores |
EP0138985A4 (en) * | 1983-03-28 | 1987-11-23 | Park Chem Co | Pressure molding process using salt cores and a composition for making cores. |
US4747598A (en) * | 1984-07-17 | 1988-05-31 | Dunlop Limited A British Company | Racket frame having interiorly located stringing lugs |
EP0178093A1 (en) * | 1984-09-28 | 1986-04-16 | Fry's Metals Limited | An improved metal core for use in plastics moulding |
GB2165482A (en) * | 1984-09-28 | 1986-04-16 | Frys Metals Ltd | An improved fusible metal core for use in plastics moulding |
US20120228801A1 (en) * | 2011-03-11 | 2012-09-13 | Wang Xiangji | Injection method for hollow products, its fusible core and the method for making the fusible core thereof |
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