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
GB4578665A
Inventor
Georgi Stoitshev Angelov
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.)
ZD 12
Original Assignee
ZD 12
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 ZD 12filedCriticalZD 12
Publication of GB1118914ApublicationCriticalpatent/GB1118914A/en
B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
Abstract
Particles of foamed polystyrene are mixed with moulding sand to increase the gas permeability of moulds and cores when the polystyrene melts, burns or vaporizes at the hardening stage or because of the heat of the metal when it is poured into the mould. The inner layer forming the mould surface may contain a small amount of foamed polystyrene as small particles, but the outer layers may have greater quantities as larger particles.
GB4578665A1964-10-301965-10-28Improvements in or relating to moulding sand
ExpiredGB1118914A
(en)
PROCESS FOR THE MANUFACTURE OF CASTING MOLDS OR CORE USING CASTING SAND AND A POLYURETHAN AS A BINDING AGENT AND CASTING MOLD OR CORE OBTAINED THEREFORE.
PROCESS FOR THE PREPARATION OF A COMPOSITION INTENDED FOR COVERING CAST MODELS AND NUCLEAR CABINETS, AS WELL AS THE APPLICATION OF THIS COMPOSITION IN COVERING CAST MODELS AND CORE CABINETS AT THE END OF THEM FOR THE MANUFACTURE OF CABINETS AND MOLDED CABINETS AND CUSTOM MOLDED CABINETS FOR SAND CABINETS AND MOLDINGS SAND FORMS AND SAND CORE.
Method of manufacturing molded parts based on cement or concrete, using missed molds, which are incorporated to the piece as a protective packaging. (Machine-translation by Google Translate, not legally binding)