PROCESS AND QUALITY CONTROL IN SPINNING Scope of process control in spinning
What is Quality Quality is the ratio between Performance and Expectations. Q = P / E Where Q – Quality P – Performance E - Expectations
Quality
Quality Standards: It denotes uniform set of measures, agreements, conditions or specifications between buyer and seller or manufacturer and user or Government and industry. It can be guidelines or characteristics for the activity. Standardization: It is the process of formulating, issuing and implementing standards.
Quality Management in Spinning Industry International Organization for Standardization (ISO) at Geneva introduced Quality Management System Standard – ISO 9000. Provides necessary guidelines to an organization in meeting customer and applicable regulatory requirements and continual improvement in quality system. The standard requires that the organization shall establish, document, implement and maintain quality management system in line with the clauses laid down in this standard.
Need for Quality Management Need to spin a quality yarn from non-standard raw material. Numerous processes and numerous process variables. Ever increasing quality demands because of the high speed post spinning processes. To reduce the cost of manufacturing and the probability of rejections. An ever increasing competitions – both domestic and global. Low profit margins in the spinning industry, so low quality is a risk. To develop a brand image.
Reasons for Poor Quality
WAYS TO ACHIEVE OPTIMUM QUALITY AND COST CONDITIONS
Bale Management Yarn Engineering Process Management
Bale Management Measurement of more important fibre properties per bale or per series of bales. Separation of these bales into classes. Arranging of those bales in a lay down which have similar fibre properties and a defined variation of the more important fibre characteristics.
Yarn Engineering Obtaining optimum conditions in terms of product quality with respect to the yarn and the end product. Optimum selectin of the raw material for the required quality. Increase of the added value by means of a better use of the raw material. Pre-determination of the yarn properties based on raw material and process data. Ensuring the quality level throughout the complete process. Keeping constant quality in order to ensure long-term marketing conditions. Reduction of manufacturing costs by increasing efficiencies.
Process Management Testing of the fibre properties before and after each important processing stage. Correct settings to achieve optimum conditions at all machines. Determination of the most suitable machine or equipment. Arranging optimum conditions for machine maintenance. Introduction of early warning systems.