Automatic in-mould edge gate cutting injection mould

Abstract

The invention relates to a plastic injection mould, in particular to an automatic in-mould edge gate cutting injection mould comprising a fixed mould, a movable mould, an ejecting mechanism, a guide post and a guide bush which are used for connecting the movable mould and the fixed mould, and a gate cutting device, wherein the gate cutting device comprises a plurality of resetting rod slide holes positioned on an edge gate of an injection part and penetrating a fixed mould core and a fixed mould plate, and a plurality of cutter slide holes penetrating a movable mould core, resetting rods are arranged in the resetting rod slide holes, and cutters are arranged in the cutter slide holes; the cutters abut against the end faces of the resetting rods which are fixed with a fixing plate of the fixed mould; the cutters abut against a movable mould plate through springs; a separation inhibiting device is arranged between the fixed mould plate and the fixing plate of the fixed mould, and a mould separating damper is arranged between the fixed mould plate and the movable mould plate. The mould opening force of an injection machine is used for cutting off a gate runner in the process of mould opening; and concretely, the cutters do shearing movements opposite to the edge gate of the part through the spring force at the bottoms of the cutters to automatically shear and separate the injection part and the gate, and therefore, the automatic in-mould edge gate cutting injection mould dispenses with the subsequent process of cutting off the gate.

Description

technical field [0001] The invention relates to a plastic injection mold, which belongs to the field of moulds, in particular to an injection mold with automatic cut-off gate inside the mold. It is to install a shearing device in the mold. During the mold opening process, the gate runner is cut off by using the mold opening force of the injection molding machine. Specifically, the spring force at the bottom of the cutter makes the cutter move against the side gate of the part. Shearing motion automatically shears and separates the injection molded part from the gate, eliminating the need for subsequent gate removal. Background technique [0002] The current plastic injection mold in the form of side gate glue injection is as follows: figure 1 As shown, it mainly includes a fixed mold 010 , a movable mold 020 and an ejection mechanism 030 , and a parting surface 0120 , a cavity 0241 and a runner 0242 are formed between the fixed mold 010 and the movable mold 020 . The fixed...

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Problems solved by technology

[0008] 1. When the cutter cuts off the nozzle, its blade must touch the fixed mold, which requires the length of the cutter, the depth of the groove, the thickness of the lower inner ejector plate and the position and height of the lower surface of the fixed mold to be very accurate, otherwise it will It will cause continuous cutting, or the collision between the cutter and the lower surface of the fixed mold will cause damage to the mold and cutter

[0009] 2. During the entire mold opening process, the ejector rod is required to move twice, the first ejection completes the cutting of the nozzle, and the second ejection completes the demoulding of the part, which not only increases the trouble in the machine tool control setting operation, but also increases the Reduced processing man-hours, reducing production efficiency

This patent does not disclose the abutting device described above, it is only an elastic device, such as a spring, or other abutting mechanism, such as a push arm, a push wheel, etc., using automatic control to match the injection molding process to the described The second cut-out of the

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