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5.3 LIMITATION OF THE RAPID PROTOTYPING MACHINE
The machine which is used to produce the product is the Fused Deposition Modeling FDM machine. Material that used on this machine is Acrylonitrile
Butadiene Styrene ABS. A plastic filament is unwound from a coil and supplies material to an extrusion nozzle. The nozzle is heated to melt the
plastic and has a mechanism which allows the flow of the melted plastic to be turned on and off. The nozzle is mounted to a mechanical stage which can be
moved in both horizontal and vertical directions. Besides, this machine also have some limitation when produces the product. The machines only can
produces the product with the size is about 10 inch length and 10 inch width. It also limited on the material of the product. The time to produce one part of
the product also takes about 10 hours to be done. However, the PE has ability to float in the water due to density 950 kgm
3
is less than density water 1000 kgm
3
.
5.4 SCENARIO 1
5.4.1 Model
This scenario shows the mass and the volume of the part which is get from the ANSYS CFX10 analysis. This analysis is form based on the fixed support
analysis.
The bounding box for the model measures 0.2 by 0.2 by 0.13 m along the global x, y and z axes, respectively.
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The model has a total mass of 1.92 kg.
The model has a total volume of 2.02×10
-3
m³.
Table 5.2: Bodies
Name Material
Nonlinear Material
Effects Bounding
Boxm Mass
kg Volume
m³ Nodes Elements
pump holder
Polyethylene Yes
0.2, 0.2, 0.13
1.92 2.02×10
- 3
22128 12387
5.4.2 Structural Support
This is the fixed support used to analyze the structural of the part. The reaction moment of the part when the force 220 N is applied on it is about
0.17 N.m. This shows that the part has a few displacements even though the fixed surface is applied.
Table 5.3: Structural Supports
Name Type
Reaction Force
Reaction Force Vector
Reaction Moment
Reaction Moment Vector
Fixed Support
Fixed Surface
220.0 N [0.0 N x,
0.0 N y, 220.0 N z]
0.17 N·m [-8.43×10
-3
N·m x, 0.17 N·m y,
0.0 N·m z]
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5.5 Structural Load