GB1411517A - Manufacture of foamed plastics material - Google Patents

Manufacture of foamed plastics material

Info

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
Application number
GB1561773A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VITA INTERNATIONAL Ltd
Original Assignee
VITA INTERNATIONAL Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VITA INTERNATIONAL Ltd filed Critical VITA INTERNATIONAL Ltd
Priority to GB1561773A priority Critical patent/GB1411517A/en
Publication of GB1411517A publication Critical patent/GB1411517A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/28Expanding 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.
GB1561773A 1973-03-31 1973-03-31 Manufacture of foamed plastics material Expired GB1411517A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
IE44073L (en) Manufacture of polymerick foam
US3832099A (en) Apparatus for producing polyurethane foam
EP0251659A3 (en) Method for manufacturing multihardness foamed articles
GB1197899A (en) Manufacture of Polyurethane Belting
US3972667A (en) Apparatus for continuously producing foamed material
GB1411517A (en) Manufacture of foamed plastics material
GB1489194A (en) Continuous moulding apparatus
ES443287A1 (en) Device for the continuous production of a strand of foamed material
US3496596A (en) Molding of foamed articles
US4005958A (en) Apparatus for continuous production of rectangular cross-sectioned foamed plastic bunstock
GB1093764A (en) Improvements in or relating to apparatus for the manufacture of thermoplastic slide fasteners by continuous injection moulding
US4080125A (en) Device for the stepless manufacture of expanded cellular material blocks with a circular cross-section
IE32295B1 (en) Improvements in or relating to changing the transverse contour of a moving web
GB1450093A (en) Manufacture of foamed plastics material
GB1241805A (en) A method and apparatus for the continuous production of foam plastics webs of rectangular cross-section
FR2380121A1 (en) INJECTION MOLDING PROCESS OF ARTICLES IN PLASTIC MATERIAL
GB1260287A (en) Improvements in or relating to the manufacture of polyurethane or isocyanurate foams
GB1502636A (en) Apparatus and methods of manufacturing expanded foam blocks of circular cross-section
US3585680A (en) Arrangement for the continuous production of shaped lengths of foam plastics
GB1508468A (en) Apparatus for the continuous manufacture of expanded cellular material blocks of a circular cross-section
FR2308479A1 (en) Continuous prodn. of plaster planks - uses horizontal mould with moving walls formed by separate endless belts driven at same speed
US3672348A (en) Apparatus for regulating the upper surface contour of expanded cellular products
GB1509688A (en) Production of slabs or blocks of foamed plastics
GB1498833A (en) Removing cast slabs from moulds
JPS5678949A (en) Preparation of building panel

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee