EP 0509987 A4 19930630 - BLOW MOULDING MULTIPLE WALLED ARTICLES
Title (en)
BLOW MOULDING MULTIPLE WALLED ARTICLES
Publication
Application
Priority
AU PJ334389 A 19890323
Abstract (en)
[origin: WO9011176A1] A method and apparatus are disclosed for producing a hollow article having a plurality of spaced generally concentric walls (50, 60) extending from a common neck (48). To produce the article, a preformed inner vessel (72) defining the inner wall (50) and neck (48) is juxtaposed with a mouldable sheet extrusion (92). Split mould segments (70) are closed around the extrusion (92) to form a substantially sealed parison therein with an annular portion of the parison extending closely around the neck (76) of the inner vessel (72). Fluid pressure medium is introduced via conduit (84) into the space (86) between the inner vessel (72) and the parison to blow mould the outer wall (60) against the moulding surfaces (90) of the mould segments (70). During the blow moulding, the interior of the inner vessel (72) is pressurized with fluid pressure medium via conduit (74) to prevent its deformation.
IPC 1-7
IPC 8 full level
B29C 49/04 (2006.01); B29C 49/00 (2006.01); B29C 49/20 (2006.01); B29C 49/22 (2006.01); B29C 49/42 (2006.01); B65D 1/00 (2006.01); B29L 24/00 (2006.01)
CPC (source: EP KR US)
B29C 49/0031 (2013.01 - EP KR); B29C 49/04 (2013.01 - KR US); B29C 49/0691 (2022.05 - EP KR); B29C 49/20 (2013.01 - EP KR US); B29C 49/42 (2013.01 - KR); B29C 49/04 (2013.01 - EP); B29C 2049/2008 (2013.01 - EP KR); B29L 2031/7418 (2013.01 - EP KR)
Citation (search report)
- [X] DE 3709426 A1 19880929 - STIEBEL ELTRON GMBH & CO KG [DE]
- [A] FR 1546033 A 19681115 - SHELL INT RESEARCH
- See references of WO 9011176A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9011176 A1 19901004; CA 2049968 A1 19900924; EP 0509987 A1 19921028; EP 0509987 A4 19930630; GR 900100218 A 19910731; JP H04505592 A 19921001; KR 920700885 A 19920810; NZ 232997 A 19911223; ZA 902267 B 19901228
DOCDB simple family (application)
AU 9000117 W 19900322; CA 2049968 A 19900322; EP 90904733 A 19900322; GR 900100218 A 19900322; JP 50485490 A 19900322; KR 910701163 A 19910920; NZ 23299790 A 19900320; ZA 902267 A 19900323