Skip to main content

Advantages of injection moulding process



1. Parts can be produced at high production rates. 
2.Large volume production is possible.
3.Relatively low labour cost per unit is obtainable. 
4. Part require little or no finishing. 
5. Many different surface, colours, and finishes are available. 
6. Good decorations is possible. 
7. For many shapes this process is the most economical way to fabricate. 
8. Process permits the manufacture of very small parts which are almost impossible to fabricate in quantities by other methods.
9. Close dimensional tolerances can be maintained. 
10. Parts can be moulded with metallic and non-metallic inserts.



Popular posts from this blog

Breaker Plate & Screen Pack :

Breaker Plate - 1. This is performed metal disk,  with a multitude of small diameter holes. 2. The breaker plate is placed in between the screw and the die assembly. 3. It's principal function is to provide support for the screen pack . 4. The breaker plate helps also to convert the spiral flow of the polymer melts leaving the screw into a linear, axial one. Screen Pack - 1. Screen Pack is usually a multilayered,  nearly symmetrical sandwich of metallic wire screens.  2. It is placed between the screw and the breaker plate,  using the latter for physical support. It's  role is to eliminate the particulate contaminants.  3. The screen pack composition is always based on trade-offs, there is need to eliminate particulates using screens with high mesh,  but at the same time this create flow restriction,  it reduced the throughput, thus low mesh would be preferred.  4. Decision should be made as for as the maximum tolerabl...

Barrel & Hopper Cooling System (Elements) :

                    : Barrel Cooling : 1. Barrel cooling is needed to prevent overheating that may cause degradation. 2. For small extruders fans that blow air over or around the barrel are used. 3. Other cooling system used include . 4. Cooling channel inside the barrel wall. 5. Find on the barrel or on the heaters to speedup that transfer. 6. A watet-fog spray over barrel. 7. Continuous, controlled vaporization of liquid (water) 8. Copper tubing carrying cold water is sometimes used.               *Hopper Cooling Systems* • Water-cooling is used to cool the hopper throat to prevent bridging and to protect the rubber parts present in the screw support  assembly.