Injection molding assembly for forming foam products

An injection molding assembly for forming foam products, comprising:

• a mold unit including a stationary mold board and a movable mold board which confine cooperatively a mold cavity, said movable mold board being formed with an inlet port to access said mold cavity, said mold unit being provided with a pressure sensor for detecting pressure inside said mold cavity;
• a mold opening mechanism connected to said stationary and movable mold boards and activable so as to open and close selectively said mold unit;
• an injection molding machine disposed adjacent to said mold unit;
• a machine moving mechanism activable so as to move said injection molding machine selectively toward and away from said mold unit;
• and
• an automatic control unit connected to said pressure sensor, said mold opening mechanism, said injection molding mechanism and said machine moving mechanism, said control unit normally activating said mold opening mechanism to move said movable mold board toward said stationary mold board so as to close said mold unit, said control unit activating said machine moving mechanism to move said injection molding machine toward said mold unit and further activating said injection molding machine to inject molten foamable material into said mold cavity via said inlet port until the pressure inside said mold cavity reaches a first predetermined value to indicate that a predetermined amount of the molten foamable material has been fed thereto, said control unit activating said machine moving mechanism to move said injection molding machine away from said mold unit and further activating said mold opening mechanism to move said movable mold board away from said stationary mold board so as to open said mold unit when the pressure inside said mold cavity reaches a second predetermined value to indicate that foaming of the molten foamable material in said mold cavity has been completed.