GB999955A - Improvements in or relating to injection moulding of foam materials - Google Patents
Improvements in or relating to injection moulding of foam materialsInfo
- Publication number
- GB999955A GB999955A GB232462A GB232462A GB999955A GB 999955 A GB999955 A GB 999955A GB 232462 A GB232462 A GB 232462A GB 232462 A GB232462 A GB 232462A GB 999955 A GB999955 A GB 999955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- injection moulding
- foaming agent
- injection
- chamber
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
- B29C44/421—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by plastizising the material into a shot cavity and injecting using a plunger
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
999,955. Injection moulding. FOSTER GRANT CO. Inc. Jan. 22, 1962, No. 2324/62. Heading B5A. In a method of injection moulding, e.g. a drinking container, from a foamable thermoplastic resinous composition the resin and a faoming agent are introduced into a chamber 18a, and forced by a ram 17 into a heating chamber 80 where they are heated without expansion of the foaming agent. The material is then forced through a valve 34 into an injection chamber 26, where it is enclosed by a valve 98, the valve 34, and an injection piston 30 so that the foaming agent cannot expand while the material is being heated to a mobile gel. The valve 98 is then opened and the piston 30 moved downwardly to inject the material into a mould 88 which has been partially evacuated by a pump 102. The pistons and valves are operated by an hydraulic control system (Fig. 3, not shown). The resin may be in the form of foamable beads introduced through a hopper 11, or a separate inlet 82 may be provided for the foaming agent. Examples of resins and foaming agents are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB232462A GB999955A (en) | 1962-01-22 | 1962-01-22 | Improvements in or relating to injection moulding of foam materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB232462A GB999955A (en) | 1962-01-22 | 1962-01-22 | Improvements in or relating to injection moulding of foam materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB999955A true GB999955A (en) | 1965-07-28 |
Family
ID=9737541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB232462A Expired GB999955A (en) | 1962-01-22 | 1962-01-22 | Improvements in or relating to injection moulding of foam materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB999955A (en) |
-
1962
- 1962-01-22 GB GB232462A patent/GB999955A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES413259A1 (en) | Method for the preparation of plastic foam | |
| GB1323746A (en) | Process and apparatus for the injection moulding of articles from plastics material | |
| ES371098A1 (en) | Foam diaphragm for loudspeaker | |
| FR2003090A1 (en) | ||
| GB1024331A (en) | Composite expanded plastics | |
| GB999955A (en) | Improvements in or relating to injection moulding of foam materials | |
| GB1317439A (en) | Moulding apparatus | |
| GB1328209A (en) | Moulding articles from foamable plastics material | |
| GB1226135A (en) | ||
| GB1012778A (en) | Production of molded articles from plastic materials | |
| JPS55113539A (en) | Injection molding | |
| ES8203265A1 (en) | Apparatus for use in moulding articles of foamed plastics material | |
| GB1333587A (en) | Injection moulding synthetic plastics articles | |
| GB1169394A (en) | Improvements in or relating to the Production of an Article by Injection Moulding of Plastics Material. | |
| ES377540A1 (en) | Injection moulding apparatus with dynamic impact injection assist means and control therefor | |
| GB974263A (en) | A process and an apparatus for the manufacture of moulded articles from synthetic thermoplastic materials containing blowing agents | |
| GB1226129A (en) | ||
| GB1459496A (en) | Plastic moulding machine | |
| FR2021652A1 (en) | Injection moulding of porous articles | |
| GB1012105A (en) | Shoe sole injection process and apparatus | |
| GB965624A (en) | Improvements in or relating to the manufacture of footwear | |
| GB1044511A (en) | Improvements in or relating to cellular moulded products | |
| GB882574A (en) | Improvements in the moulding of plastics | |
| GB1161422A (en) | Improvements in or relating to the Manufacture of Cartride Cases | |
| GB1523675A (en) | Injection foam moulding method and apparatus |