Systems and methods to fabricate an injection molded piece with a weakened portion

A method to fabricate an injection molded piece with a weakened portion in an injection molding system, the injection molding system including a cavity defined by a fixed mold part and a moveable mold part, the method comprising:

• injecting raw material in a liquid state into the cavity to form the injection molded piece;
• moving a weakening insert into the injection molded piece from a first surface of the injection molded piece, wherein the first surface faces the moveable mold part;
• and
• injecting a gas to the first surface of the injection molded piece;
• wherein the gas is controlled being injected at a first value at a first gas injection stage and injected at a second value at a second gas injection stage;
• wherein moving the weakening insert into the injection molded piece and injecting the gas are performed while the injection molded piece is in the liquid state;
• and
• wherein the second gas injection stage starts after an insertion of the weakening insert into the injection molded piece and the second value is greater than the first value.