GB1411517A - Manufacture of foamed plastics material - Google Patents
Manufacture of foamed plastics materialInfo
- Publication number
- GB1411517A GB1411517A GB1561773A GB1561773A GB1411517A GB 1411517 A GB1411517 A GB 1411517A GB 1561773 A GB1561773 A GB 1561773A GB 1561773 A GB1561773 A GB 1561773A GB 1411517 A GB1411517 A GB 1411517A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trough
- moulding
- diverting
- diverting element
- slab
- 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
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/28—Expanding the moulding material on continuous moving surfaces without restricting the upwards growth of the foam
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
1411517 Continuous moulding of foamed webs VITA INTERNATIONAL Ltd 29 April 1974 [31 March 1973] 15617/73 Heading B5A [Also in Division C3] A method of obviating dome formation during the continuous casting of foamed plastics slabstock comprises diverting a part of the foaming mass, whilst it is still mobile, towards the sidewalls 11 of the moulding trough by means of a shaped element 15 positioned on the base of the moulding unit. As shown in Fig. 2, the diverting element comprises a platform having a flat surface 16 parallel to the base 10 of the moulding trough, and, downstream of this, an inclined portion having ramps 18, 19 inclined transversely of the trough and a region 17 inclined in the longitudinal direction of the trough. The carrier web 13 passes over the diverting element, liquid foamable mixture being deposited on the web as it passes over the surface 16. The position of the diverting element is adjusted so that the foamable mixture is still mobile when it reaches the downstream edge 20 of the element, thus preventing cavity formation in the slab. The diverting element may be split longitudinally to enable its width to be adjusted. By the method of the invention, the effects of surface tension and temperature gradient within the block are reduced so that a substantially flat block is produced. If necessary, any high regions at the sides of the slab may be reduced by pressure rollers 21, as shown in Fig. 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1561773A GB1411517A (en) | 1973-03-31 | 1973-03-31 | Manufacture of foamed plastics material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1561773A GB1411517A (en) | 1973-03-31 | 1973-03-31 | Manufacture of foamed plastics material |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1411517A true GB1411517A (en) | 1975-10-29 |
Family
ID=10062382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1561773A Expired GB1411517A (en) | 1973-03-31 | 1973-03-31 | Manufacture of foamed plastics material |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1411517A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252757A (en) * | 1979-05-11 | 1981-02-24 | Accuratio Systems, Inc. | Method and apparatus for making foamed plastic slab |
US4260353A (en) * | 1978-09-27 | 1981-04-07 | Metzeler Schaum Gmbh | Apparatus for producing rectangular blocks of foamed resins |
US4330494A (en) | 1978-09-13 | 1982-05-18 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Reinforced foamed resin structural material and process for manufacturing the same |
-
1973
- 1973-03-31 GB GB1561773A patent/GB1411517A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4330494A (en) | 1978-09-13 | 1982-05-18 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Reinforced foamed resin structural material and process for manufacturing the same |
US4260353A (en) * | 1978-09-27 | 1981-04-07 | Metzeler Schaum Gmbh | Apparatus for producing rectangular blocks of foamed resins |
US4252757A (en) * | 1979-05-11 | 1981-02-24 | Accuratio Systems, Inc. | Method and apparatus for making foamed plastic slab |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |