(1) Bounce-opening secondary demoulding mechanism: The injection molded part has two inner cavities, of which the inner layer is the deeper cavity. When the primary demoulding mechanism is used to produce deformation and cracking, the primary demoulding of the injection molded parts relies on the action of the spring to complete the demoulding of the deep inner cavity; the secondary demoulding is carried out by the push rod under the action of the ejector rod mold. In this way, the deformation of the injection molded part during demolding can be reduced.
When the fixed and movable molds are opened to a certain distance, due to the action of the spring, the moving mold plate moves a distance, and the injection molded parts are pulled out of the core. Because the injection molded parts have a demoulding slope, it is in addition to the tightening force on the core. . After completing one ejection, due to the action of the ejector rod of the injection machine, the ejector rod will completely eject the injection molded parts to move the mold core. When the mold is closed, the ejector rod needs to be reset by the return rod. When using this mechanism for secondary ejection, a parting mechanism should be set at the same time to ensure that the ejection action is performed after the mold is opened to a certain distance, so as to prevent the injection molded parts from being stuck on the fixed mold.
(2) Floating core type secondary demoulding mechanism: When there is an obstacle in the inner cavity of the injection molded part that requires forced demoulding, and the wall of the injection molded part is thin and the demoulding is easy to deform, the injection molded part is demolded at one time Relying on the stripping plate to complete the demoulding of the inner cavity of the injection molded part, the secondary demoulding is to rely on the stripping plate to complete the inner cavity barrier body of the injection molded part, which requires mandatory demoulding to reduce the demoulding deformation and cracking of the injection molded part .
When ejecting, the push rod pushes the ejection plate to make the injection molded part separate from the core, except for obstacles to the periphery of the injection molded part. At the same time, due to the effect of the concave and convex shape of the injection part, the core is forced to move with the injection part. Demoulding.
(3) Swing block type advanced secondary demoulding mechanism: when the precision of the inner cavity of the injection molded part is high, the mold cavity has no demoulding slope and requires a large demoulding force, and the injection molding part has a thin wall for demoulding. When it is easy to deform, the first ejection relies on the push rod; the second ejection relies on the pressure rod to swing the pendulum block, and then pushes the push rod for secondary demoulding.
(4) Slider type advanced secondary demoulding mechanism: The secondary demoulding mechanism of the injection mold is designed. When the injection mold wall is thin and easy to deform when demoulding, Dongguan Macchike injection mold processing manufacturer in order to make the injection molded parts can stay On the moving model core, the demoulding force of the injection molded parts in the moving model core must be greater than the demoulding force in the fixed mold model. When the slider on the ejector plate of the ejection mechanism is under the action of the oblique pin, the slider moves in parallel, and the ejector plate is pushed by the ejector plate to move when the ejector rod is pushed out of the injection part twice by the ramp of the slider. The distance is so that the injection molded parts are separated from the core, and at the same time, the oblique pins are ejected from the cavity of the part plate.
