Cutting system

A cutting system for cutting a gate mark of a mold, the cutting system comprising:

• a dam comprising a body and a cutting portion adapted to abut the gate mark;
• a cylinder comprising a piston secured to the body;
• a resilient member secured between the body and the mold;
• a hydraulic controlling module outputting a high pressure oil to the cylinder, and the hydraulic controlling module comprising a reversing valve connected to the cylinder;
• and
• a PLC controlling module connected to the reversing valve and adapted to output a controlling signal to control the reversing valve to a first open position or a second open position;
• wherein when the reversing valve is in the first open position, the reversing valve allows the high pressure oil to flow into the cylinder from the hydraulic controlling module, thereby causing the piston to push the cutting portion to slide along a first direction to cut the gate mark, and the resilient member is elastically deformed;
• when the reversing valve is in the second open position, the high pressure oil in the cylinder flows back to the hydraulic controlling module, and the resilient member returns to push the dam and the piston to slide along a second direction;
• and the first direction is opposite to the second direction.