PROJECT 3:

TEXTILE TECHNOLOGY, TECHNICAL DATA / MECHANICAL SETTING

AND TAGUCHI PARAMETRIC DESIGN TESTS

Technical Data/ Machine Settings is an important parameter that effects to the costs. But it is important that which parameters are selected as database. For example: in the card, doffer turn is always calculated but no one calculates the carding/cm values. However carding/cm value effects the neps formation. So, Technical Data/ machine settings working are an example for so many mills.

Technical Data/ machine settings from blending to ring frame is a sensitive setting of quality and productivity. Technical Data/ machine settings are a database of Spinning Mill DATABANK. The quality defaults could be eliminated through determining all of technical data/ machine settings in the mill. Summary of Technical Data/ machine settings is,

So, Technical Data/ machine settings could change according to blending and yarn Ne. Pc-programs help to determine technical data/ machine settings. R&D project workings of Technical Data/ machine settings could achieve these are below,

As a result of this working, yarn process parameters, optimum technical data/ machine settings, standard value and tolerances are determined. And then, these data will be the database of Process Summary Pc-Programs.

Technical Data/ machine settings and their standard values and tolerances are able to change physical characteristics of raw material. Faulty or unconscious settings cause fibre breakage, fibre abrasion and also waste increase.

Table 2: Relation with Technical Data/ machine settings and costs

Process

Effected factors of costs increase

%Waste of blending

Technical Data/ machine settings, raw material properties, climate factors

%Waste of card

Technical Data/ machine settings, raw material properties, climate factors

Breakage

Technical Data/ machine settings, raw material properties, climate factors

Production levels

Technical Data/ machine settings, raw material properties, climate factors, training

Productivity (H.O.K)

Technical Data/ machine settings, raw material properties, climate factors, training

%Efficiency

Technical Data/ machine settings, raw material properties, climate factors, training

%Waste of comb

Technical Data/ machine settings, raw material properties, climate factors

Quality defaults

Technical Data/ machine settings, raw material properties, climate factors, training

Pc-programs include the technical computes of all of the machines, machine data, technical data/ machine settings, optimum changeable compute of cylinder and gear and kinetic charts. While pc-programs are implementing, quality correction working and training are done.

We benefit from spectrogram and diagram analysis. Spectrogram is a line diagram, which shows the changes of diameter of unit length or weight through Fourier series. The line diagram shape changes as to each fibre. Mechanical default forms an extra perpendicular line on this line. Diagram shows the continuous changes of the weight or diameter and also the mechanical defaults can be found.

A spectrogram curve or line gives,

From the fibrogram, drafting defaults and process optimization could be determined through drawing the spectrogram curves and comparing the spectrogram curves values.

Computing the mechanical defaults takes a long time with spectrogram. But with the help of the computer, it takes short time and also prior and next processes are controlled well. Mechanical defaults, which occur in either card or draft, cause thick and thin places and increase breakage in weaving. Therefore, mechanical defaults must be eliminated. Spectrogram programs are the basic of "spinning mill databank". Each machine in the mill must have,

All machine in the mill are taken in control. Through implementing these programs, evenness tester in the laboratory would be used efficiently. Also the effects of the machine settings changes on yarn quality are taken in control. All these workings provide,

 

Knowledge Based Quality Systems             Proses Optimization and R&D Projects for Textile Mills