Injection Mold Runner And Gate Design

This is the contact point between the machine and the mold.

Injection mold runner and gate design.

For the complicate product it s necessary to make mold flow analysis to help design a good runner system and gate position. The rule of thumb in traditional mold design is that the runner should be round and equal to the part s nominal wall stock at the gate. Hobbyists typically remove the parts of a model kit from the runner using a sharp craft knife or razor saw. Design standard for sprue.

First every mold has a sprue. While it is true that those plastic material may be reused in the form of regrind their presence nevertheless means a reduction in the performance of the injection molding machine inasmuch as they. There are three channels in which the plastic flows from the injection molding machine into the part cavity. Sprues runners and gates fulfill the function of conveying the plastics melt from the nozzle of the injection unit to the individual cavities.

1 injection molding machine nozzle and sprue matching. With each branch going back to the sprue the runner s diameter should increase 10 to 15 and then intersect the sprue base. Ates and runners are an essential part of the injection molding process. The spherical surface sr of the mold sprue should be 1 2mm larger than the nozzle sr of the injection molding machine.