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Optimizing Sand Moulding Process through Regression Models and Destructive Testing

Abdulamer Dheya

Archives of Foundry Engineering

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2023

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Vol. 23, iss. 4

163--168

EN

The main objective of the present study is enhanced of the sand moulding process through addressing the sand mould defects and failures, ultimately lead to improve production of the sand castings with well-defined of pattern profiles. The research aimed to reduce the cost and energy expenditure associated with the compaction time of the sand moulding process. Practical destructive tests were conducted to assess properties of the green sand moulds. Linear regression and multi-regression methods were employed to identify the key factors influencing the sand moulding process. The proposed experimental destructive tests and predicted regression methods facilitated measurement of the green sand properties and enabled evaluation of the effective moulding parameters, thereby enhancing the sand moulding process. Factorial design of experiments approach was employed to evaluate effect of parameters of water content and mixing time of the green sand compaction process on the mechanical properties of green sand mould namely the tensile strength, and compressive strength.

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Process of quality improvement in the company producing building materials

Sygut P.

Production Engineering Archives

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2013

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Vol. 1, No. 1

16--18

EN

The aim of the study was to identify the problems and improve the production of cement in a ball mill in terms of technology and management associated with the use of known methods and techniques to improve quality. A detailed analysis helped to explain the process which affects the efficiency of grinding cement and which is the most common cause of disturbance and incompatibilities in the process of milling, how the production process is managed and controlled in order to obtain the required grain size, which is the main parameter influencing the quality of the manufactured product. To manage the change of the process there has been used a value stream map for analysis of the intermediate process of cement production, transport to the silos, bagging and selling. Based on the research some proposals of the process improvement have been designed that might have a chance of implementation and execution.

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Zastosowanie modelu kalkulacji różnicowych do usprawnienia procesu produkcji brykietu opałowego z agrobiomasy

Bojar W., Żarski W.

Zarządzanie Przedsiębiorstwem

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2012

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Vol. 15, nr 1

13-18

EN

In the paper on the base of literature review and also opinions of entrepreneurs dealt with fuel briquette manufacturing and also the data coming from selected enterprise a differential calculation model was worked out. First, circumstances of development of renewable energy sources sector in Poland were highlighted. One can indicate both high potential of renewable energy resources in Poland, big investments in this area last time and chances resulted in increasing demand for such kind of fuel and stimulating the EU legal requirements as well. Secondary, course of manufacturing and logistics processes of fuel briquette fabrication were analyzed considering relevant technical and economical parameters. Detail description of those processes let set crucial factors influenced studied fuel briquette production. This enabled elaboration of differential calculation model to set up interesting decision scenarios and simulate their different financial effects with marginal calculation method. Once can analyze impact of different levels of raw material humidity at unit cost of fuel briquette output. Next, financial effects of failures of crumbling machine influenced by polluted raw material were investigated. One can underline difficulty to precise probability of occurrence of such failures and to estimate accurately relevant costs closed to them. Third, elaborated model let simulate effects of different average transportation distance of enterprise from raw material location and also different prices of fuel. One can conclude that transportation costs are crucial for profitability of studied manufacturing process. Hence, worked out method of analysis of decision scenarios was verified positively as useful tool let update management in enterprises dealt with manufacturing of fuel briquette made from agro biomass. One can conclude that quality of raw material about level of pollution and humidity and also distance of its transportation and fuel price are crucial factors determining production process and shaping production costs, what is very important in planning.

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Efekty zastosowania planowania kroczącego na przykładzie fabryki mebli

Wirkus M., Bąk K.

Zarządzanie Przedsiębiorstwem

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2012

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Vol. 15, nr 2

32-38

EN

Rolling wave planning is the process of planning for a project in waves as the project becomes clearer and unfolds. It is important in such projects to at least highlight in the initial plan the key milestones for the Project. Rolling Wave Planning acknowledges the fact that we can see more clearly what is in close proximity, but looking further ahead our vision becomes less clear [3]. Article shows benefits of rolling wave planning in production field. Based on the same data, there are two forecast calculations. First calculation is about current state of weekly cycle planning, second calculation is about future state of rolling wave planning (wave is the period of one day). Problem of current state is lack of production cells capacity, that makes costs of overtime. After research of implementing rolling wave planning there is shown estimations for new level of production cells capacity. New way of planning brings benefits in better aggregations, which reduce time for exchanges. Reduced time we can use for extra value-added process witch rise production cells capacity. Figure 5 include both calculations and final results.