Method to chase weld lines by timing and positioning of gates

A method for molding a part comprising:

• calculating a number of valve gates in a mold to fill a part cavity while maintaining a selected molding pressure, wherein the calculated number of valve gates comprises a first valve gate and a second valve gate;
• forming a mold having the part cavity with the calculated number of valve gates, wherein each valve gate is positioned around the part cavity to balance a flow length ratio;
• and
• inserting flowing material through said valve gates to form a molded-in metallic part using a specific sequence of gate openings according to a selected gate timing, wherein the inserting flowing material through said valve gates comprises injecting material into a first valve gate, determining a time for the material to travel from said first valve gate to a second valve gate, and opening said second valve gate after a flow front of the material passes said second valve gate,
• wherein the calculated number of valve gates are controlled to maintain the selected molding pressure in the part cavity.