EP 0516224 B1 19960410 - Porous mould materials, their production and their use for forming ceramic castings
Title (en)
Porous mould materials, their production and their use for forming ceramic castings
Title (de)
Materialien für poröse Formen, ihre Herstellung und ihre Verwendung zum Formen von keramischen Produkten
Title (fr)
Matériaux pour moules poreux, leur production et leur utilisation pour le moulage de céramiques
Publication
Application
Priority
DE 4117745 A 19910530
Abstract (en)
[origin: EP0516224A1] The invention relates to porous, water-absorbent plastics mould material for use in the forming of ceramic castings from ceramic moulding materials. According to the invention they contain short fibres of length 1-6 mm in a quantity of up to 4 weight% with respect to the weight of the plastics content, as filler. The invention also relates to a process for producing these mould materials and their use in the forming of ceramic castings. Shrinkage and mechanical properties are considerably improved by the addition of short fibres, even in a very small added quantity. By producing the mould materials from water-in-oil emulsions the permeability of the mould materials can be adjusted within a wide range by controlling the degree of dispersion of the emulsion, so that both pressure-less and pressurized ceramic body formation and controlled release of the ceramic body from the mould by compressed air without the use of an aid become possible.
IPC 1-7
IPC 8 full level
B28B 1/26 (2006.01); B28B 7/34 (2006.01); C08F 2/24 (2006.01)
CPC (source: EP)
B28B 1/263 (2013.01); B28B 7/344 (2013.01); B28B 7/346 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0516224 A1 19921202; EP 0516224 B1 19960410; AT E136489 T1 19960415; DE 4117745 A1 19921203; DE 4117745 C2 20031113; DE 69209719 D1 19960515; DE 69209719 T2 19960919; ES 2087431 T3 19960716
DOCDB simple family (application)
EP 92201457 A 19920521; AT 92201457 T 19920521; DE 4117745 A 19910530; DE 69209719 T 19920521; ES 92201457 T 19920521