1, filling defect

It always show uncompleted filling or edge collapse, it will deceived product, waste material, labor and time. Here are many possible reason, such as nozzle temperature is too low, not enough supply, flowablity not good, injection pressure is low, the gate is too small or not right position, the mold surface is injection mold companies not smooth enough, nozzle is blocked, venting problem

2,flash or burr

It always happen in parting line, it will increase the difficulty of machining or dishape, even defective. The possible reason such as: nozzle temperature too high, injection too much material, flowbility is very good, injection pressure too high, clamping force too small

3,sink mark

It always caused by material shrink after injection molding, possible reason such as: nozzle temperature too high, resin supply not enough, shrinkage is too big, injection molding pressure too low, holding time too short, injection speed too slow, mold temperature too plastic molding company high, cooling time too short, the thickness of product is uneven, gate too small

4,welding line

It always happen in product which have holes or other shape, possible reason such as: nozzle temperature too low, material is not dry up enough, injection speed is too slow, gate too small, venting is not good, injection pressure too lower other reason