Selection of Tooling for Extrusion of Polyamide Hoses Using Process Capability Analysis

Abstract

Objective: This research is a case study carried out in a polyamide hose factory located in Brazil. The research seeks to identify the best set of tools to be used in a polymer extruder in the manufacture of polyamide 11 hoses. Search with the set of tools seeking the best production quality, without dimensional variations and in a more stable way from the beginning. Methods: By visualizing the dimensions of the product and the dimensions of the tools. To achieve this, Minitab® software is used to analyze the capacity of the production process with three different combinations of tools. The three productions were carried out with modifications to the original set of tools, one with changing the former and the last with changing the pin and extrusion die. Results and conclusion: Process capacity analysis showed that the last combination, with a former with a smaller gap in relation to the hose and with a pin and die with smaller gaps than the initial set, was more efficient, producing a hose with fewer dimensional variations. Research implications: Process capability analysis proves to be useful in assisting engineers in the development of tools to produce thermoplastic hoses, reducing dimensional variations and product defects, generating savings in material, hours worked and costs. Originality/Value: Hoses are produced not only by the oil and gas sector, but also for other purposes such as hospital use, retail and civil construction. This study will help the production of thermoplastic hoses in any segment.