Correlation of technological parameters and quality of castings obtained by the EPC method

Trumbulovic, Ljiljana; Acimovic, Zagorka; Gulisija, Zvonko; Andrić, Ljubiša

doi:10.1016/j.matlet.2003.09.057

Cited by 18 publications

(7 citation statements)

References 3 publications

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Section: Advanced Casting Technologies 90mentioning

confidence: 99%

“…This started in the year 1980 and they are still in the use of the process. The full mold process unlike the conventional sand casting process uses patterns and pouring system, which retains the pattern in the mold, thus justifying the title full mold [5]. The term 'evaporative' stands as a family name for all the trade names that have so far been coined out for evaporative pattern casting processes.…”

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confidence: 99%

“…However, predictions have been made that soon very many foundries would use the process; looking at it from the perspective of automotive industries. It is believed that if the process parameters that affect the EPC process are properly monitored and controlled and there is proper gating system design and melting and pouring practices, defect free castings should be obtained [5].In order to obtain castings with good surface finish free from defects researchers both in industries and academia are giving attention to both experimental, modeling and theoretical studies of the variables known to influence the process [2,6,[12][13][14][15][16][17]. It has been recognized that the pyrolysis products are the main source of defects in EPC [11,18].…”

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Evaporative Pattern Casting (EPC) Process

Omidiji¹

2018

Advanced Casting Technologies

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The chapter provides details of operations and activities in evaporative pattern casting (EPC) Process. The process was developed in the year 1956 to tackle some of the inadequacies of the traditional sand casting processes but has in itself some challenges that should be taken care of if sound castings would be obtained. The challenges come mainly from the evaporative pattern employed as pattern material in the process. The material makes the process to be sensitive to process variables such that proper and adequate control should be ensured to have castings of sound integrity. Some of the known process variables are pouring temperature, refractory coating, vibration and pattern and molding materials. In the whole the EPC is known to have edge over the traditional sand casting methods.Keywords: pattern, molding, casting, variables and coating History of evaporative pattern casting (EPC) processEvaporative pattern casting (EPC) Process is a sand molding process that makes use of evaporative patterns produced industrially by steam molding or machined out from a block of expandable polystyrene foam (EPS) [1,2]. The pattern is buried in the sand mold and the melted casting material is poured into the mold without removing pattern, unlike the traditional sand casting method that makes use of wooden, plastic and metallic pattern which is removed from the mold before molten metal is advanced.It was in 1956 that Shroyer made a documentation of his work on EPC where green sand was used as the molding material [3]. The author machined a shape from expanded polystyrene (EPS) and supported it inside a flask with bounded sand. Another researcher called Flemmings © 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.came up in 1964 to use unbounded silica grains for the process [1]. Foundry men later came to differentiate between the two; calling the first the full mold and the second the lost foam processes. The subtle difference only lied in the use of bounded (green) sand and loose sand.The process became known to foundry men in 1958 and many trade names have been formed to describe it [3]. They include styrecast, replicast, full mold, lost foam and evaporative process. A distinguishing feature of this type of sand process is that an evaporative pattern made of polystyrene foam is used [4]. It is coated with a coating developed from a refractory material usually silica or zircon sand before being buried in the mold. It is not removed from the mold once it is buried.After 1964, some works have been done by researchers to understand the variables that affect the process. Some works in the automotive industry have also been done. General motors have produced a number of automotive components with the method. This started in the year 1980 and they are still in the use of the p...

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Section: Advanced Casting Technologies 90mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Evaporative Pattern Casting (EPC) Process

Omidiji¹

2018

Advanced Casting Technologies

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“…It runs through the whole process of production. The quality of casting is not easy to control because of many processes and many factors [1][2][3][4]. At present, the management level of castings is not high, which cannot meet the requirements of modern enterprises for the quality of castings.…”

Section: Introductionmentioning

confidence: 99%

Research on Cloud Platform of Castings Quality Management Based on Spark

Xie¹,

Zhou²,

Yuan³

2017

Topics in Intelligent Computing and Industry Design (ICID)

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The casting quality management costs too much manpower, material and financial resources and is still lack of scientific status. In view of these conditions, this paper builds the casting quality management cloud platform based on Spark. Build and deploy Spark Standalone on the local computer. Parallel computing and cloud storage mechanism are implemented by Spark. Task management scheduling is implemented by Standalone. The foundry enterprise uses this platform to carry on the big data analysis to the influence factors of casting quality in the casting production. According to the results of the analysis, the scientific guidance and efficient scheduling of the manufacturing process are carried out. The quality management of castings is standardized and scientific. The scrap rate of castings is reduced. Through the large data analysis of various factors affecting the quality of casting, a set of scientific and efficient management scheme is provided.

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“…In general, increasing pouring temperature results in the increased in fluidity of the molten metal. However, overheating is not desirable because it leads to higher hydrogen porosity and development of coarse-grained structure due to destruction of the crystallization centres [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Casting Parameters on Shape Replication and Surface Roughness of LM6 Aluminium Alloy Cast Using Lost Foam Process

Karimian

Ourdjini

Idris

et al. 2014

Trans Indian Inst Met

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In this paper, an experimental investigation on shape replication and surface roughness of Al-12 wt% Si alloy casting produced by lost foam casting process was conducted. 5-step shape patterns incorporated with top and bottom gates were used. Four top gating systems with different pouring cup configurations namely single-middle, single-side, double and single-wide and a simple bottom gate design were investigated to appropriate filling to produces sound casting. Three sand vibration times of 1, 2 and 3 min were used for the moulding process. Molten metal was poured at five different temperatures of 660, 680, 700, 720 and 740°C. Shape replication and surface roughness of the cast samples were analysed visually and by roughness tester, respectively. The results showed that pouring cup design has a significant effect on the replication and surface integrity of the castings. It was also found that single topwide pouring cup as well as lower vibration time and higher pouring temperature provided castings with better shape replication and smoother surface finish with a surface roughness of 19-20 lm compared to 25-31 lm for castings produced with other cup configurations.

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Correlation of technological parameters and quality of castings obtained by the EPC method

Cited by 18 publications

References 3 publications

Evaporative Pattern Casting (EPC) Process

Evaporative Pattern Casting (EPC) Process

Research on Cloud Platform of Castings Quality Management Based on Spark

Effects of Casting Parameters on Shape Replication and Surface Roughness of LM6 Aluminium Alloy Cast Using Lost Foam Process

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