Water-assisted injection molding equipment

Abstract

The invention discloses water-assisted injection molding equipment. The water-assisted injection molding equipment comprises a double-screw injection machine, a water needle, a first mold and a secondmold. A mounting hole is formed in the first mold. The water needle is mounted in the mounting hole and comprises a water needle valve element, a water needle valve body, a spring, a sealing ring, anend cap and an air needle. The first mold is provided with a water inlet channel and an air flue. The air needle is provided with an air inlet channel. The water inlet channel is externally connectedwith a water supplying device. The air needle is externally connected with an air supplying device through the air flue. One end of the second mold is connected with the first mold, and the other endof the second mold is connected with the double-screw injection machine through an injection pipe. A sprue is formed in the second mold. A controller is arranged on the double-screw injection machine. The second mold is provided with a pressure sensor. The water needle valve element is provided with a displacement sensor. The pressure sensor and the displacement sensor are connected with the controller. The water-assisted injection molding equipment is simple in structure, formed molds are easy to replace and adjust, and the water-assisted injection molding equipment is suitable for various complex pipe fitting products.

Description

technical field [0001] The invention relates to plastic processing equipment, in particular to water-assisted injection molding equipment. Background technique [0002] With the development of science and technology, a new molding technology has emerged in plastic injection molding technology, that is, fluid-assisted injection molding technology. Unlike traditional injection molding methods, it directly injects high-pressure fluid into the core of the plastic melt to form a hollow cavity. , This molding method greatly reduces the residual stress of the product, reduces the use of materials, and the appearance quality of the product is better, which has more advantages than traditional injection molding. [0003] Fluid-assisted injection molding is divided into gas-assisted injection molding and water-assisted injection molding. Gas-assisted injection molding has advantages that traditional hollow molding cannot match, but it has some disadvantages, such as low heat transfer ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the existing technology, the structure of the water-assisted injection molding equipment is complex, the pressure and speed of the injection machine screw retraction are uncontrollable, the properties of the reflowing polymer melt and the original material in the barrel are inconsistent, and the drainage of the injection molding equipment Slow, low production efficiency and other defects, the present invention provides a water-assisted injection molding equipment, the equipment structure is simple, the forming mold is easy to replace and adjust, and is suitable for various complex pipe fittings and hollow products

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