Plastic Injection Molded Parts Vs Aluminum Casting Parts

 
Plastic injection vowin.cn/en/News/news1251.html' target='_blank'>vowin.cn/' target='_blank'>molding and aluminum die casting are the most 2 popular methods for producing components. They are suitable for mass production but also for low volume manufacturing. They are similar and different.
 
Plastic Injection Mold Parts
 
Advantages:
 
1.       The melting temperature of plastic part is lower than aluminum parts.
2.       In same design, product in plastic is lighter than in aluminum.
 
Disadvantages:
 
1.       Plastic injection molded parts usually require metal inserts to hold a thread for screws.
2.       Plastic does not block EMI/RF waves.
3.       Compare to aluminum part, plastic part is not strong.
4.       Plastic is not typically biodegradable.
 
Aluminum Parts
 
Advantages:
 
1.       Part can be threaded directly on hole.
2.       Can apply post machining to obtain high precision dimension.
3.       Aluminum casting part has great thermal transference properties.
4.       Aluminum is a natural conductor of electricity.
5.       All aluminum alloys (360, 380, 383, and 413) are made from recycled materials.
6.       Comparing to plastic parts, aluminum parts are stronger/
7.       Aluminum naturally shieds EMI/RF waves.
 
Disadvantages
 
1.       In the same design, product in aluminum weighs heavier than plastic.
2.       Aluminum parts usually needed post machining and post finishing.