The dimensional and shape accuracy of vacuum castings prepared in plaster moulds
Journal Title: Archiwum Odlewnictwa - Year 2011, Vol 11, Issue 3
Abstract
The results of laboratory test on the dimensional and shape accuracy of bronze plaster castings CuSn10, CuSn5Zn5Pb5and AlSi11 silumin are presented in this paper. The test castings were made in form of rods of length 100mm and diameters 4 mm, 7 mm and 10mm. The temperatures of molten alloys were 1120, 1160 and 1200ºC for bronzes and 700, 750 and 800ºC for silumins. Mould temperatures 500 and 600ºC and 250 and 300ºC respectively. The relative dimension change in given technological conditions by relating to the wax model. Analogical researches were made for plate-like CuSn10 bronze castings by calculating the relative dimension change in two perpendicular axis. Obtained results allowed to state that temperature of cast alloy influences the relative dimensional change, next the mould temperature and type of material (CuSn5Zn5Pb5, CuSn10, AlSi11 relatively). The transverse dimension of the mould does not influence the dimensions of test castings. Temperature of the mould as well as casting temperature do not influence the shape accuracy of the castings.
Authors and Affiliations
M. Pawlak
Keywords
Related Articles
- EP ID EP72369
- DOI -
- Views 100
- Downloads 0
The Lost Foam method – pre-expansion process
In the study, a pre-expansion station, designed by authors, was presented. It consists of a batch pre-expander with a 90 liters capacity foaming chamber, equipped with fluidized-solid dryer of pre-expanded beads and a pn...
The modification process of AlSi21CuNi silumin and its effect on change of mechanical properties of the alloy
Due to difficulties present during machining operations and with segregation of crystals of primary silicon, hypereutectic silumins can be used after modification only. It is why elaboration of effective modification met...
Total productive maintenance on example of automated foundry lines
Within framework of the presented study one has performed analysis of stoppages in automatic foundry lines operation, and basing on assumptions from complex maintenance system has undertaken himself to develop a service...
Influence of Blowing of Argon on the Cleanness of Steel
The mechanical properties of steel components are controlled by the chemical composition and mechanical treatment to which the steel is submitted. Non-metallic inclusions have a very high influence on the steel quality b...
Continuous Modification of Cast Iron by the FLOTRET Method
Increasing demands on the utility properties of materials used for castings have led to the production of cast iron with a modified shape of graphite, where the required properties are achieved by a change in graphite sh...