2 The material will be use in this project is polypropylene. This material has a different
properties and parameter from other material. The accurate result for polypropylene can be finding and can conclude of the quality of product. The surface roughness of
the specimen must be measured by using Surface Roughness Tester. The tensile test of the product produced must be carry on and analysis the result of the test using the
Universal Tensile Machine UTM. One of the major activities of manufacturing engineering is the assessment of the effects of changing process parameter values on
part characteristics. The primary use of process models is to predict these effects. Often process models
are inadequate for this task, usually because the process is very complex or because accurate material behavior descriptions at processing conditions are unavailable. So
the defect of from the result produce should be analyze and try to improve the surface quality of the product. Outcome of the defect will be defined to produce the
better parameter.
1.2 Background of Problem
Nowadays, quite a variety of different techniques are employed in the forming polymeric material. Injection moulding is the most common method for method for
forming plastic polymer. Injection moulding is the most widely used moulding process for thermoplastics and thermosetting. Injection moulding is economical only
for large production quantities. Thus, the product of produced using injection moulding have are troubleshooting. Most of the defects of the product have a come
from not proper parameter setting in plastic injection moulding. Besides that, in this project also have to optimize the parameter of the injection and determine the
accurate value of the parameter. Before this, the parameter is manually setting and dont have the accurate value. The other side, the problem is to minimize of the
defect on and improve surface quality of the injection moulding. A through understanding of the moulding process will be help determine the causes.
3
1.3 Problem Statement
There are several main points needed to be concentrated and questions need to be answered at the end of the topic:
i. How different processing parameters affected surface quality of polypropylene PP material?
ii. How different processing parameters affected tensile strength of polypropylene PP material?
1.4 Objectives of Project
Objective of this project is:
1. To study the effect of process parameter in plastic injection moulding of polypropylene PP.
2. To measure the surface roughness of sample product from optimized process parameter.
3. To determine the maximum tensile strength value of polypropylene PP.
1.5 Scope of The Project
This project to study the effect of process parameter in plastic injection moulding, so for the started to optimize the parameter, the sequence of the process was:
i. Material selection for polypropylene. Pure polypropylene have been used to investigate the parameter setting in injection moulding
ii. Produce the specimen using Plastic injection Moulding. The parameter should be setting based on the parameter selection.
iii. Measure surface roughness for the produce specimen and other defect involve in surface quality.
iv. Tensile test using Universal Testing Machine UTM to find maximum tensile strength of value for each specimen based on different parameter
setting.
4 v. Analyze the result and find the optimum result for this investigation for
parameter setting of Plastic Injection Moulding.
1.6 Overview of the Thesis
