An injection molding system includes an injection station, a molding device, and a plunger. The injection station includes a platform including an opening and an injector over the platform. The molding device is disposed between the platform and the injector and over the opening, wherein the molding device includes a mold cavity and a clamping unit for clamping the molding device. The plunger under the platform, wherein the plunger includes a base and a rod extendable through the opening toward the molding device and retractable toward the base. An injection molding method includes conveying a molding device to an injection station and disposing the molding device between an injector and a platform; disposing a plunger under the platform; moving the injector towards the molding device; applying a plunging force on the molding device by extending the rod through the opening; and injecting a molding material into a mold cavity.

An anti-falling protection device for an automatic mold opening and closing machine is used on a mold mounting unit to secure or release an upper mold with a pair of wings, and is provided with a movable member movably disposed on the mold mounting unit, two protection members movably provided along two lateral surfaces of the mold mounting unit, a power unit which extends and retracts between a first position and a second position, and the connecting member connected between the power unit and the movable member. When in the first position, the power unit drives the two protection members to move toward the power unit and make the protection members stop beneath the wings, and when in the second position, the piston drives the two protection members to move away the wings of the upper mold.

An anti-falling protection device for an automatic mold opening and closing machine is used on a mold mounting unit to secure or release an upper mold with a pair of wings, and is provided with a movable member movably disposed on the mold mounting unit, two protection members movably provided along two lateral surfaces of the mold mounting unit, a power unit which extends and retracts between a first position and a second position, and the connecting member connected between the power unit and the movable member. When in the first position, the power unit drives the two protection members to move toward the power unit and make the protection members stop beneath the wings, and when in the second position, the piston drives the two protection members to move away the wings of the upper mold.

An automatic opening and closing device for a mold assembly includes a base, a pivot seat, a first extensible unit, an upper mold mounting unit, two shafts, a second extensible unit, a left arm and a right arm. The first extensible unit can move the upper mold mounting unit downward to clamp or release the mold, and the second extensible unit is used to move the pivot seat between two positions. When the pivot seat is in a first position, the upper mold mounting unit can be lowered down to secure or release the mold by the first extensible unit, when in the second position, the upper mold mounting unit and the mold can be rotated an angle, to perform opening or closing of the mold assembly.

An automatic opening and closing device for a mold assembly includes a base, a pivot seat, a first extensible unit, an upper mold mounting unit, two shafts, a second extensible unit, a left arm and a right arm. The first extensible unit can move the upper mold mounting unit downward to clamp or release the mold, and the second extensible unit is used to move the pivot seat between two positions. When the pivot seat is in a first position, the upper mold mounting unit can be lowered down to secure or release the mold by the first extensible unit, when in the second position, the upper mold mounting unit and the mold can be rotated an angle, to perform opening or closing of the mold assembly.

A mold clamping device for an automatic mold opening and closing machine is used to clamp or release an upper mold which has a pair of wings. The mold clamping device is provided with two pressure cylinder units located at two lateral surfaces of the mold mounting unit, two pivot units pivoted to the two pressure cylinder units, respectively, and two clamping members pivotally disposed between the pressure cylinder units and the pivot units. When the first piston is in the first position, the clamping member will be rotated an angle to disengage the inner portion from the wing of the upper mold, and when in the second position, the piston will drive the clamping member to rotate an angle in a reverse direction, so that the wing of the upper mold is clamped between the inner portion and the bottom surface of the mold mounting unit.

A mold clamping device for an automatic mold opening and closing machine is used to clamp or release an upper mold which has a pair of wings. The mold clamping device is provided with two pressure cylinder units located at two lateral surfaces of the mold mounting unit, two pivot units pivoted to the two pressure cylinder units, respectively, and two clamping members pivotally disposed between the pressure cylinder units and the pivot units. When the first piston is in the first position, the clamping member will be rotated an angle to disengage the inner portion from the wing of the upper mold, and when in the second position, the piston will drive the clamping member to rotate an angle in a reverse direction, so that the wing of the upper mold is clamped between the inner portion and the bottom surface of the mold mounting unit.

An anti-falling protection device for an automatic mold opening and closing machine is used on a mold mounting unit to secure or release an upper mold with a pair of wings, and is provided with a movable member movably disposed on the mold mounting unit, two protection members movably provided along two lateral surfaces of the mold mounting unit, a power unit which extends and retracts between a first position and a second position, and the connecting member connected between the power unit and the movable member. When in the first position, the power unit drives the two protection members to move toward the power unit and make the protection members stop beneath the wings, and when in the second position, the piston drives the two protection members to move away the wings of the upper mold.

An anti-falling protection device for an automatic mold opening and closing machine is used on a mold mounting unit to secure or release an upper mold with a pair of wings, and is provided with a movable member movably disposed on the mold mounting unit, two protection members movably provided along two lateral surfaces of the mold mounting unit, a power unit which extends and retracts between a first position and a second position, and the connecting member connected between the power unit and the movable member. When in the first position, the power unit drives the two protection members to move toward the power unit and make the protection members stop beneath the wings, and when in the second position, the piston drives the two protection members to move away the wings of the upper mold.

A predetermined mold gap is provided beforehand between a movable mold and a stationary mold of a mold by a mold clamping device. A mold clamping pressure is set to zero, and a predetermined back pressure is set for the movable mold. Subsequently, the injection device is caused to start injection of the molten resin into the mold for which the mold gap, the mold clamping pressure, and the back pressure have been set. When a predetermined injection end condition set beforehand is satisfied as a result of progress of an injection filling process, a filling end process of ending the injection filling process is performed.