A simple and reliable injection and drainage device for water-driven projectile-assisted injection molding process

Abstract

The invention discloses a water-driven projectile auxiliary injection molding process injection and drainage device with simple structure and reliable action, which mainly includes a valve body 2, a limit bracket 4, a quick-plug joint 11, a coupling 7, a lower air core 9, and a valve core Cover 12, upper air core 16, steel air needle 17, nozzle 18, cylinder support 5, multiple thin-wall cylinders 6, etc. The injection and drainage device is highly portable; the design of the gas injection-drainage channel ensures reliable and effective drainage; the combination of the shape seal and the seal ring seal ensures a reliable seal between the rubber material, the water injection channel and the gas injection-drainage channel; The three-stage design of the mouth 18 also ensures the reliable sealing of the rubber and water; the two-step extraction can reliably empty the water in the cavity; the multi-position thin-walled cylinders 6 drive the spool assembly to be graded up and down through solenoid valve control Movement, so that each channel is connected or disconnected in sequence, to achieve water injection, gas injection-drainage and nozzle extraction, and the action is reliable; it is suitable for water-driven projectile-assisted injection molding and similar processes.

Description

technical field [0001] The invention relates to a simple and reliable water-driven projectile auxiliary injection molding process injection and drainage device, which can be used for experiment and production of water-driven projectile auxiliary injection molding process and similar processes. Background technique [0002] Different from the water-assisted injection molding technology, which uses water to penetrate directly into the rubber material to form a hollow, the water-driven projectile-assisted injection molding technology uses pressure water to drive the projectile to penetrate through the rubber material to obtain a hollow part. The hollow section mainly depends on The maximum cross-sectional shape and size of the projectile; this technology can form hollow plastic parts with larger cross-section, more complex, thinner and uniform wall thickness, and there is no limitation on the material of the part, so this technology has a wider range than water-assisted injectio...

AI Technical Summary

Problems solved by technology

The structure of this device is simple, but there are the following problems: the cost of mold manufacturing is high; the water injection device is not transplantable; gravity drainage requires a large nozzle, the drainage efficiency is low and the water cannot be completely emptied effectively; water leakage to the surface of the cavity will cause serious problems affect the quality of the product

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