Reduction gear injection mold

Abstract

The invention discloses a reduction gear injection mold and belongs to the technical field of injection molds, the reduction gear injection mold comprises a fixed mold and a movable mold which is arranged on one side of the fixed mold and can slide, when the fixed mold and the movable mold are in a mold closing state, mold cavities are formed in the fixed mold and the movable mold, and through holes used for installing a center shaft are formed in the middle of the fixed mold and the middle of the movable mold; the through hole communicates with the cavity, and a cooling cavity used for cooling the interior of the cavity is formed in the outer side of the cavity. A feeding device is arranged on the side, away from the movable mold, of the fixed mold, a discharging chamber is arranged in the feeding device, and a pushing device used for pushing the center shaft into the through hole is arranged at the bottom of the discharging chamber. A gear can be formed in the middle of the center shaft in an injection molding mode, the gear and the center shaft are integrated, not prone to falling off and firm in fixation, the cooling cavity is cooled through spraying of the spray head, the surface of a formed product is evenly cooled, and due to thermal expansion and cold contraction of the product, the gap between the product and the partition plate is increased, and stripping is easier.

Description

technical field [0001] The invention relates to a reduction gear injection mold, which belongs to the technical field of injection molds. Background technique [0002] Reduction gears are commonly used parts in generators or engines, and have high strength. The gears and shafts are generally connected by keys or interference connections. The interference connection should strictly control the amount of interference. Both connections are gears. The follow-up connection after the shaft is produced, these two connection methods are prone to loosening after long-term use, so the present invention provides an injection mold that directly injects the gear on the shaft during production. Among them, due to the complex shape, the cooling system of the gear is not perfect after the demoulding is completed, and it is prone to sticking and deformation. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a reducti...

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Problems solved by technology

[0002] Reduction gears are commonly used parts in generators or engines, and have high strength. The gears and shafts are generally connected by keys or interference connections. The interference connection should strictly control the amount of interference. Both connections are gears. The follow-up connection after the shaft is produced, these two connection methods are prone to loosening after long-term use, so the present invention provides an injection mold that directly injects the gear on the shaft during production. Among them, due to the complex shape, the cooling system of the gear is not perfect after the demoulding is completed, and the phenomenon of sticking and deformation is prone to occur

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