ADJUSTING OFF – CENTERING PROCESS FOR A BLOW MOLDED PLASTIC PRODUCT BY USE OF WINQSB SOFTWARE

Ahmed A. Al - Khafaji; Kawakib A. AL - Mendwi; Dursaaf M. H. Al - Saady

doi:10.31026/j.eng.2012.04.11

Article Details

ADJUSTING OFF – CENTERING PROCESS FOR A BLOW MOLDED PLASTIC PRODUCT BY USE OF WINQSB SOFTWARE

Authors:

Ahmed A. Al - Khafaji | Kawakib A. AL - Mendwi | Dursaaf M. H. Al - Saady

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.18 Issue 4, pp.518-532

Document Type:

Article

Publication Date:

1/2012

Document Language:

English

Document ID (Org No.):

2001380511

pISSN:

2520-3339

DOI:

10.31026/j.eng.2012.04.11

Keywords:

Abstract:

 In most manufacturing processes, and in spite of statistical control, several process capability indices refer to non conformance of the true mean (µc ) from the target mean ( µT ), and the variation is also high. In this paper, data have been analyzed and studied for a blow molded plastic product (Zahi Bottle) (ZB). WinQSB software was used to facilitate the statistical process control, and process capability analysis and some of capability indices. The relationship between different process capability indices and the true mean of the process were represented, and then with the standard deviation (σ ), of achievement of process capability value that can reduce the standard deviation value and improve production out of theoretical control limitations and cost reduction.The study exhibits that when adjusting the center to the target value by adjusting the mold to the machine, the capability index (C ) enhanced by (14.56 %), capability index ( p C ) is enhanced by (14.48 %), pk capability index (Cpm ) is enhanced by (12.5 %) and accuracy index (Ca ) is enhanced by (14.49 %). The percentage of the specification band used up by the process ( P ) is reduced by (12.8 %) and the degree of variation increases.

Article Details

ADJUSTING OFF – CENTERING PROCESS FOR A BLOW MOLDED PLASTIC PRODUCT BY USE OF WINQSB SOFTWARE

Authors:

Ahmed A. Al - Khafaji | Kawakib A. AL - Mendwi | Dursaaf M. H. Al - Saady

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.18 Issue 4, pp.518-532

Document Type:

Article

Publication Date:

1/2012

Document Language:

English

Document ID (Org No.):

2001380511

pISSN:

2520-3339

DOI:

10.31026/j.eng.2012.04.11

: Process Capability

Process Capability Analysis

WinQSB Software

Process Capability Index

Control Charts

Mean Shift

Off – Center

Issues

Article Details

Authors: Ahmed A. Al - Khafaji | Kawakib A. AL - Mendwi | Dursaaf M. H. Al - Saady

Publisher: University of Baghdad

Journal: Journal of Engineering Vol.18 Issue 4, pp.518-532

Document Type: Article

Publication Date: 1/2012

Document Language: English

Document ID (Org No.): 2001380511

pISSN: 2520-3339

DOI: 10.31026/j.eng.2012.04.11

Issues

Authors:

Ahmed A. Al - Khafaji | Kawakib A. AL - Mendwi | Dursaaf M. H. Al - Saady

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.18 Issue 4, pp.518-532

Document Type:

Article

Publication Date:

1/2012

Document Language:

English

Document ID (Org No.):

2001380511

pISSN:

2520-3339

DOI:

10.31026/j.eng.2012.04.11