Aggregate Molding Materials

Author(s):  
Mariusz Holtzer ◽  
Angelika Kmita
Keyword(s):  
Author(s):  
Fedoruk O. ◽  
◽  
Fedoruk A. ◽  

The article is devoted to the publication ofmaterials of a technical and technological analysis of ceramics discovered on four nowadays non-existent settlements, founded during the Stolypin reforms, on the territory of the modern Tabunsky district of the Altai region. As a result of the study, it was found that ceramic products from clays of medium and strong ferrous content, of various plasticity prevailed there. Three recipes for molding materials have been founded. Most of the products were fired at high temperatures with oxygen access. Most of the crockery were not subjected to additional surface treatment; glazed items are also found, one vessel was ornamented. The data obtained agree with the available written and ethnographic sources. Further work on the technical and technological analysis of “Russian” ceramics, as well as conducting archaeological and ethnographic research, can provide more complete information about the level of development of pottery production in Altai, as well as reveal the specifics and local features of different districts. Keywords: pottery, ceramics, first half of the 20th century, altai, technical and technological analysis


2016 ◽  
Vol 78 (6-6) ◽  
Author(s):  
Siti Zaleha Mohd Nor ◽  
Romzee Ismail ◽  
Sahrim Ahmad ◽  
Ahmad Salihin Samsudin ◽  
Mohd Ikmar Nizam Mohamad Isa

Suitable block mold formulations for copper alloy casting have been developed and the formulations used were 25% plaster of paris (POP), 75% silica sand and 31-37% water. Silica sand with a grain size of 106-212 µm was added into dilute suspension of POP and the mixing process was continued until a thick slurry (mixture) was obtained. It has been found that the mixing time of molding materials was highly depended on the type of plaster and optimum slurry viscosity around the diameter of 7.7 – 9.6 cm (slump test) was essential to ensure that the wax pattern could be fully invested. In the dewaxing process, the mold was subjected to the temperature of 170oC for 3 hours and burnout process was effectively achieved by heating the molds at 750oC for 5 hours. The pouring process was successfully carried out without any leakage and it was found that all molds can be easily broken under a force of a hammer.  The developed mold also able to produce fully formed of casting without any major defects such as misrun, fin or flash and rat tail, which can be associated with inadequate mold temperature, mold cracks and the separation of mold’s material respectively.


2016 ◽  
Vol 25 (10) ◽  
pp. 4359-4368
Author(s):  
Marcin Górny ◽  
Rafał Dańko ◽  
Janusz Lelito ◽  
Magdalena Kawalec ◽  
Gabriela Sikora

2000 ◽  
pp. 479-622
Author(s):  
Dominick V. Rosato ◽  
Donald V. Rosato ◽  
Marlene G. Rosato
Keyword(s):  

1997 ◽  
Vol 53 (9) ◽  
pp. 400-408
Author(s):  
Teruo Kimura ◽  
Koji Nakanishi ◽  
Yukie Kondo

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