The moulded consumer electronics components made from injection may be intricate or simple. Intricate plastic electronic components molding can be economical because they may combine many parts into one piece and thus save the cost of the fabrication and joining of several separate pieces. Joints must be machined and bolted together. Misalignment and loosening during vibration may result.
Sand castings weighing several tons (such as a locomotive frame) have been made to advantage because of their ability to combine several parts into one piece. The more complicated the moulded electronics components , the more ingenuity and control required. The simpler the electronics components, the less the cost of plastic mold and pattern equipment and hence the less expensive the electronics components.