Plastic injection moulding is a process that plastic is melted in the injection moulding machine and then injected into the mould, where it cools and solidifies into the final part .
Drying the pellets
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Loading the injection machine
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Heating and shearing material to be melted
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Ejecting product from mould
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Injecting the melt to mould
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Cavity Product cooling and solidification
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Melt temperature Mould Temperature Temperature profiles |
Resident Time Injection speed Injection pressure |
Pack pressure Clamping force Cushion |
As injection moulding guarantees high production rate, low labor cost and good quality product appearance and dimension, the process is widely used for automotive bumper production. Nevertheless, various technique problems should be considered and dealed with, for example, the bumper product defects such as sink mark,welding line, warpage always occur which could be related to material,part design,tool design,moulding process and so on.
We Hengji Mould works out several expert options for injection system and cooling system by moldflow analysis on filling and cooling.Through comparing the simulations of filling,packing,residual stress, warpage and so on,the best option of gate setting and cooling system comes about. The analysis jobs should be done before mould making order be confirmed but takes very important part in project that it will be applied in mould test procedure as reference, and very minus parameter or tooling modification may be done could bring us good results that customer can use our bumper mold to produce quality products.
http://www.automotive-mold.net/