Double-valve-needle type hot runner system

Abstract

The invention discloses a double-valve-needle type hot runner system comprising a spreader plate, a plate A installed at the lower end of the spreader plate, a main injection nozzle module, a hot sprue device and an air cylinder module, wherein the spreader plate is provided with a heating wire assembly. The main injection nozzle module comprises a main injection nozzle, a first heating coil, a main injection nozzle sleeve and a press sheet. The hot sprue device comprises a hot sprue installed in the plate A through a locating ring in a matched manner, a second heating coil, a first nozzle core, a second nozzle core, a heat insulation plate, a first heat insulation cap and a second heat insulation cap, wherein the heat insulation plate, the first heat insulation cap and the second heat insulation cap are installed at the lower ends of the first nozzle core and the second nozzle core. The first heat insulation cap and the second heat insulation cap are exposed in a first pouring gate and a second pouring gate which are located at the lower end of the plate A correspondingly. The air cylinder module comprises a face plate, a piston, a cylinder cover, a first valve needle and a secondvalve needle. A valve sleeve press block, a first valve sleeve and a second valve sleeve are installed between the face plate and the spreader plate. The lower end of the first valve needle sequentially penetrates through the first valve sleeve, the hot sprue, the first nozzle core and the first heat insulation cap so as to control the liquid discharge amount of the first pouring gate. The lowerend of the second valve needle sequentially penetrates through the second valve sleeve, the hot sprue, the second nozzle core and the second heat insulation cap so as to control the liquid discharge amount of the second pouring gate.

Description

Technical field: [0001] The invention relates to the technical field of hot runner systems, in particular to a double-valve needle hot runner system. Background technique: [0002] Injection molding equipment is a device that uses plastic molding molds to make thermoplastics into various shapes of plastic products. With the continuous development of hot runner technology, the valve needle hot runner system has been widely used in the injection molding process. [0003] The valve needle hot runner system in the prior art generally has a structure in which one nozzle corresponds to one outlet, that is, one nozzle injects one product. When multiple identical or different products need to be injected, multiple hot nozzles need to be installed, and its structure becomes more complicated, and there are relatively more parts, resulting in increased production costs. [0004] In view of this, the inventor proposes the following technical solutions. Invention content: [0005] T...

AI Technical Summary

Problems solved by technology

When multiple identical or different products need to be injected, multiple hot nozzles need to be installed, the structure becomes more complex, and there are relatively more parts, resulting in increased production costs

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