Plastic mold based on high-pressure airflow acceleration common resonance

Abstract

The invention discloses a plastic mold based on high-pressure airflow acceleration common resonance. The plastic mold comprises a fixed mold base plate, a fixed mold, a current-increment and speed-resistance differential mold, a cushion block, a push plate, a movable mold base and an injection molding port; the lower surface of the fixed mold base plate is bonded with the upper surface of the fixed mold; and the current-increment and speed-resistance differential mold is tightly bonded under the fixed mold. The plastic mold has the following beneficial effects: under the effect of a compressedgas accelerator, gas can be secondarily accelerated, so that sprayed gas forms high pressure and high speed; under the effect of a negative-pressure cavity, when the gas passes through, upper and lower gas cavities form a high-negative-pressure state, and plastic in a molten state is hoisted to prevent a flowing speed difference between the outer surface and the center part; and under the cooperation effect of a molding core and a resonator along an unsticking machine, the internal stress of plastic injected in a finished product cavity of the mold is stable, so that the shortage phenomenon of the finished product center part is prevented, and the quality of plastic finished products is improved.

Description

technical field [0001] The invention relates to the field of molds, in particular to a plastic mold based on high-pressure airflow speed-up resonance. Background technique [0002] Plastic mold is a combined plastic mold used for compression molding, extrusion molding, injection molding, blow molding and low foaming molding. It is mainly composed of a moving mold and a fixed mold. The moving mold is installed on the moving template of the injection molding machine. The fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic product. [0003] However, when injecting products with large wall thickness, after the injected plastic is melted, due to its high viscosity and relatively weak fluidity, the injection pressure is limited. During the continuo...

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Problems solved by technology

[0004] Aiming at the deficiencies existing in the prior art, the object of the present invention is to provide a plastic mold based on high-pressure airflow speed-up resonance, to solve the problem that the injected plastic is melted due to its high viscosity when injection molding products with large wall thickness. High, relatively weak fluidity, limited injection pressure, in the process of continuous injection molding, the flow velocity of the outer surface is slower than that of the central part, resulting in the cooling of the outer surface faster than the central part, as the cooling progresses, The resin in the center part expands toward the surface while shrinking, so that the center part is insufficiently filled, which causes a partial shortage of material in the center part and affects the quality of the finished product.

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