scholarly journals Sand Casting Implementation of Two-Dimensional Digital Code Direct-Part-Marking Using Additively Manufactured Tags

2021 ◽  
Author(s):  
Tekin Uyan ◽  
Kalle Jalava ◽  
Juhani Orkas ◽  
Kevin Otto
Keyword(s):  
Supply Chain ◽  
Casting Process ◽  
Statistical Quality Control ◽  
Process Data ◽  
Statistical Process ◽  
Root Cause ◽  
Mold Making ◽  
3D Printed ◽  
Matrix Codes ◽  
Cast Parts

AbstractStatistical quality control is used in foundries to identify special cause defects and root causes by correlating process input variations with casting defects. A difficulty exists in associating process data collected with individual cast parts as the parts are processed through the foundry and then out into the supply chain. Typically, alphanumeric labels for marking castings and manual identification of the castings with route-paper based tracing approaches have been used. Such manual-based systems make root cause analysis of quality defect issues tedious. This study presents the development of a semi-automated approach using 3D printed sand mold inserts shaped as 2D matrix codes which thereby permit directly cast identification code into the parts. This enables automated part tracking at the very beginning of the casting process including mold making. Automated scan based tracking of parts through a foundry and subsequent supply chain allows for statistical process data collected to also be associated with each part processed with unique identification, building upon the part history and pedigree.

Additively Manufactured Tags for Cast Part Traceability Using Two-Dimensional Digital Code Direct-Part-Marking

2020 ◽  
Author(s):  
Tekin Uyan ◽  
Kalle Jalava ◽  
Juhani Orkas ◽  
Kevin Otto
Keyword(s):  
Supply Chain ◽  
Casting Process ◽  
Statistical Correlation ◽  
Statistical Quality Control ◽  
Process Data ◽  
Statistical Process ◽  
Cast Part ◽  
Root Cause ◽  
Mold Making ◽  
Matrix Codes

Abstract Statistical quality control is applied in factories and foundries to identify special cause defects and to identify root causes through statistical correlation of process input variations to defects. A difficulty arises in associating process data collected with individual cast parts as they are worked through the foundry and out into the supply chain. Typically, alphanumeric labels for marking castings and manual identification of the castings with route-paper based tracing approaches have been used. Such manual based systems make root cause analysis of quality defect issues tedious. We here develop a semi-automated approach using 3D printed sand mold inserts shaped as 2D matrix codes which thereby permit directly cast identification code into the parts. This enables automated part tracking at the very beginning of the casting process including mold making. Automated scan-based tracking of parts through a foundry and subsequent supply chain allows for statistical process data collected to also be associated with each part processed with unique identification.

Effective optimization of SARS-CoV-2 laboratory testing variables in an era of supply chain constraints

2020 ◽  
Vol 15 (15) ◽  
pp. 1483-1487
Author(s):  
Nikhil S Sahajpal ◽  
Ashis K Mondal ◽  
Allan Njau ◽  
Sudha Ananth ◽  
Kimya Jones ◽  
...  
Keyword(s):  
Supply Chain ◽  
Rna Extraction ◽  
Nasopharyngeal Swab ◽  
Sample Collection ◽  
Rt Pcr ◽  
Pcr Assay ◽  
Short Supply ◽  
Viral Transport ◽  
3D Printed ◽  
Bridging Studies

RT-PCR-based assays for the detection of SARS-CoV-2 have played an essential role in the current COVID-19 pandemic. However, the sample collection and test reagents are in short supply, primarily due to supply chain issues. Thus, to eliminate testing constraints, we have optimized three key process variables: RNA extraction and RT-PCR reactions, different sample types and media to facilitate SARS-CoV-2 testing. By performing various validation and bridging studies, we have shown that various sample types such as nasopharyngeal swab, bronchioalveolar lavage and saliva, collected using conventional nasopharyngeal swabs, ESwab or 3D-printed swabs and, preserved in viral transport media, universal transport media, 0.9% sodium chloride or Amies media are compatible with RT-PCR assay for COVID-19. Besides, the reduction of PCR reagents by up to fourfold also produces reliable results.

A review on the role of 3D printing in the fight against COVID-19: safety and challenges

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sapam Ningthemba Singh ◽  
Vavilada Satya Swamy Venkatesh ◽  
Ashish Bhalchandra Deoghare
Keyword(s):  
Supply Chain ◽  
3D Printing ◽  
Three Dimensional ◽  
Content Type ◽  
Medical Supplies ◽  
Future Challenges ◽  
Safety And Reliability ◽  
3D Printed ◽  
Comprehensive Study

Purpose During the COVID-19 pandemic, the three-dimensional (3D) printing community is actively participating to address the supply chain gap of essential medical supplies such as face masks, face shields, door adapters, test swabs and ventilator valves. This paper aims to present a comprehensive study on the role of 3D printing during the coronavirus (COVID-19) pandemic, its safety and its challenges. Design/methodology/approach This review paper focuses on the applications of 3D printing in the fight against COVID-19 along with the safety and challenges associated with 3D printing to fight COVID-19. The literature presented in this paper is collected from the journal indexing engines including Scopus, Google Scholar, ResearchGate, PubMed, Web of Science, etc. The main keywords used for searches were 3D printing COVID-19, Safety of 3D printed parts, Sustainability of 3D printing, etc. Further possible iterations of the keywords were used to collect the literature. Findings The applications of 3D printing in the fight against COVID-19 are 3D printed face masks, shields, ventilator valves, test swabs, drug deliveries and hands-free door adapters. As most of these measures are implemented hastily, the safety and reliability of these parts often lacked approval. The safety concerns include the safety of the printed parts, operators and secondary personnel such as the workers in material preparation and transportation. The future challenges include sustainability of the process, long term supply chain, intellectual property and royalty-free models, etc. Originality/value This paper presents a comprehensive study on the applications of 3D printing in the fight against COVID-19 with emphasis on the safety and challenges in it.

Root-cause analysis of process-data quality problems

2021 ◽  
pp. 1-25
Author(s):  
Robert Andrews ◽  
Fahame Emamjome ◽  
Arthur H.M. ter Hofstede ◽  
Hajo A. Reijers
Keyword(s):  
Data Quality ◽  
Root Cause Analysis ◽  
Process Data ◽  
Cause Analysis ◽  
Root Cause

Utilization of 3D Printed Materials in Expendable Pattern Casting Process

2020 ◽  
pp. 338-344 ◽  
Author(s):  
Dika Handayani ◽  
Nicole Wagner ◽  
Victor Okhuysen ◽  
Michael Seitz ◽  
Kyle Garibaldi
Keyword(s):  
Casting Process ◽  
3D Printed ◽  
Printed Materials ◽  
Expendable Pattern

scholarly journals Proposal for an approach to evaluate continuity in service supply chains: Case of the Moroccan electricity supply chain

2019 ◽  
Vol 9 (6) ◽  
pp. 5552 ◽  
Author(s):  
Houda Mezouar ◽  
Abdellatif El Afia
Keyword(s):  
Supply Chain ◽  
Business Process ◽  
Business Process Management ◽  
Process Management ◽  
Residential Buildings ◽  
Suggested Approach ◽  
Root Cause ◽  
Process Behavior ◽  
Service Supply Chains

The purpose of this paper is to develop an approach to analyse and evaluate continuity in Service Supply Chain (SSC), through a case study. This approach is based on the data-driven quality strategy "Define, Measure, Analyze, Improve, Control" (DMAIC) which is used to drive Six Sigma projects, and on the characteristics of Smart Supply Chain. It combines Business process management (BPM), Supply Chain Operations Reference (SCOR), and the Root cause analysis tree diagram. The chosen case study is the electricity SCC, especially the business process 'management of electricity for residential buildings' of the Moroccan electricity SSC. The paper shows that the suggested approach identifies the discontinuity causes for the studied SSC, improves the business process behavior and manages its control by providing a dashboard that encompasses KPIs for periodically controlling of the SSC "to-be" state.

Looking for the best compromise in rapid food mycotoxin tests: speed, sensitivity, precision and accuracy

2014 ◽  
Vol 7 (4) ◽  
pp. 407-415 ◽  
Author(s):  
A.J. Alldrick
Keyword(s):  
Supply Chain ◽  
Safety Management ◽  
Management Systems ◽  
Safety Management Systems ◽  
Successful Management ◽  
Statistical Process ◽  
Commercial Arbitration ◽  
Local Conditions ◽  
High Dependency ◽  
Precision And Accuracy

Mycotoxins provide additional challenges to food businesses in terms of successful management of food-safety management systems. These reflect, in part, an unusually high dependency on the activities of others in the supply chain to ensure that levels of contamination remain within set limits. Consequently analyses for mycotoxins by food businesses are primarily commissioned for one or a combination of two reasons: to determine compliance with regulatory or commercial standards or; as part of an exercise to verify the efficacy of the businesses foodsafety management systems. Given the regulatory/commercial implications, the standard of evidence needed to demonstrate (non)compliance will be the greater than that needed for simple verification. Consequently, decisions relating to matters of regulatory or commercial arbitration need to be based on agreed and well defined methods of analysis, which are normally laboratory-based. These data are also often sufficient to be used to verify foodsafety management systems. However, supply conditions may predicate the need for increased levels of verification and rapid mycotoxin test-kits have the potential to both meet this need and satisfy the requirements of statistical process control. Nevertheless, it is important to note that deployment of such test-kits cannot be considered to be a ‘turnkey’ exercise and that, as in the case of laboratory-based assays, care must be taken in the validation and subsequent verification of their use for a given material being used within a food business. In particular, this means demonstrating under local conditions that results from the use of these test-kits are comparable to those that would be obtained using official or reference methods.

Inspection in Process Control

1998 ◽  
Vol 42 (16) ◽  
pp. 1170-1174
Author(s):  
Somchart Thepvongs ◽  
Brian M. Kleiner
Keyword(s):  
Quality Control ◽  
Process Control ◽  
Signal Detection ◽  
Control Chart ◽  
Control Charts ◽  
Signal Detection Theory ◽  
Detection Theory ◽  
Statistical Quality Control ◽  
Total Quality ◽  
Statistical Process

Consistent with the precepts of total quality control and total quality management, there has been a resource shift from incoming and outgoing inspection processes to statistical quality control of processes. Furthermore, process control operators are responsible for their own quality, necessitating the in-process inspection of components. This study treated the statistical process control task of “searching” control charts for out-of-control conditions as an inspection task and applied the Theory of Signal Detection to better understand this behavior and improve performance. Twelve subjects participated in a research study to examine how the portrayal of control chart information affected signal detection theory measures. The type of display did not have a significant effect on the sensitivity and response criterion of subjects. These results are discussed in terms of the applicability of Signal Detection Theory in control chart decision making as well as implications on display design.

scholarly journals Investigation of Shrinkage Defect in Castings by Quantitative Ishikawa Diagram

2017 ◽  
Vol 17 (1) ◽  
pp. 174-178 ◽  
Author(s):  
B. Chokkalingam ◽  
V. Raja ◽  
J. Anburaj ◽  
R. Immanual ◽  
M. Dhineshkumar
Keyword(s):  
Casting Process ◽  
Casting Defects ◽  
Remedial Measures ◽  
Pareto Chart ◽  
Root Cause ◽  
Ishikawa Diagram ◽  
Shrinkage Defect ◽  
Automobile Body ◽  
The Many ◽  
And Control

Abstract Metal casting process involves processes such as pattern making, moulding and melting etc. Casting defects occur due to combination of various processes even though efforts are taken to control them. The first step in the defect analysis is to identify the major casting defect among the many casting defects. Then the analysis is to be made to find the root cause of the particular defect. Moreover, it is especially difficult to identify the root causes of the defect. Therefore, a systematic method is required to identify the root cause of the defect among possible causes, consequently specific remedial measures have to be implemented to control them. This paper presents a systematic procedure to identify the root cause of shrinkage defect in an automobile body casting (SG 500/7) and control it by the application of Pareto chart and Ishikawa diagram. with quantitative Weightage. It was found that the root causes were larger volume section in the cope, insufficient feeding of riser and insufficient poured metal in the riser. The necessary remedial measures were taken and castings were reproduced. The shrinkage defect in the castings was completely eliminated.

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