EP 1005409 A1 20000607 - IMPROVEMENTS IN OR RELATING TO GAS ASSISTED INJECTION MOULDING
Title (en)
IMPROVEMENTS IN OR RELATING TO GAS ASSISTED INJECTION MOULDING
Title (de)
VERBESSERUNGEN AN ODER IN BEZUG AUF DURCH GAS UNTERSTÜTZTES SPRITZGIESSEN
Title (fr)
AMELIORATIONS CONCERNANT OU APPORTEES AU MOULAGE PAR INJECTION AUX GAZ
Publication
Application
Priority
- GB 9801879 W 19980714
- GB 9714807 A 19970715
Abstract (en)
[origin: WO9903665A1] A mould for a gas assisted method of injection moulding has first and second mould parts defining a mould cavity. A series of upstanding ribs extend from the surface of the mould defining the mould cavity. These ribs produce complementary channels (30) in a moulding produced in the mould. These channels (30) split the mould cavity into a plurality of communicating sub-sections (31). Channels are provided splitting the ribs into sections and forming, during the moulding process, connecting ribs (35) of plastic between the plastic adjacent the channels (30). These ribs contribute to the lateral rigidity of the moulded product. The sub-sections enable an otherwise uncontrollable void to be divided into controllable smaller voids.
IPC 1-7
IPC 8 full level
B29C 45/17 (2006.01); B29D 31/515 (2006.01); B29D 35/12 (2010.01)
CPC (source: EP)
B29C 45/1704 (2013.01); B29D 35/122 (2013.01); B29D 35/124 (2013.01); B29D 35/128 (2013.01)
Citation (search report)
See references of WO 9903665A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 9903665 A1 19990128; AU 8447298 A 19990210; EP 1005409 A1 20000607; GB 9714807 D0 19970917
DOCDB simple family (application)
GB 9801879 W 19980714; AU 8447298 A 19980714; EP 98935110 A 19980714; GB 9714807 A 19970715