13.1 Introduction
The purpose of material testing may be for problem solving, quality control or process control. In
this chapter the discussion will focus primarily on quality control and process control in support
of production. The underlying motivation is possible cost-saving and quality improvement. For the
latter the uniformity and reproducibility of quality are the most important. The elimination of
waste is also considered.
The activities of quality and process control go hand-in-hand in production as illustrated in
Figure 13.1. In relation to the quality control characterisation methods for gum rubber and those
for compounds have been given in the earlier chapters. However, characterisation is primarily for
problem solving, which requires detailed examination.
For that purpose fundamental research based on a scientific approach must be adopted. Testing in
support of production is quite different from characterisation because of many constraints, of
which time is one. This aspect will be discussed in section 13.2.
Process control requires monitoring of process parameters. In order to understand the significance
of the parameters, it is necessary to know the process mechanisms. The energy aspect and mixing
mechanism have been given in the earlier chapters. Some monitoring involves testing of material
quality. White [1] reviews the history of rheological instruments for processability and quality
control.
13.2 Material testing
The requirements and constraints imposed for testing are:
1. Ease of operation with the possibility of automation.
2. Provision of accurate and reproducible data.
3. Results obtained quickly with instant feedback.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
الرجوع الى لوحة التحكم
|