Injection mold runner and gate design standards hot runner design guidelines three plate runner and pin point gate design standards.
Injection mold runner and gate design.
Ates and runners are an essential part of the injection molding process.
1 injection molding machine nozzle and sprue matching.
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.
This is the contact point between the machine and the mold.
Hobbyists typically remove the parts of a model kit from the runner using a sharp craft knife or razor saw.
Many scale model kits are made from injection molded plastic.
For the complicate product it s necessary to make mold flow analysis to help design a good runner system and gate position.
With each branch going back to the sprue the runner s diameter should increase 10 to 15 and then intersect the sprue base.
Design standard for sprue.
The spherical surface sr of the mold sprue should be 1 2mm larger than the nozzle sr of the injection molding machine.
Sprues runners and gates fulfill the function of conveying the plastics melt from the nozzle of the injection unit to the individual cavities.
There are three channels in which the plastic flows from the injection molding machine into the part cavity.