Single-cylinder multi-point hot runner system

Abstract

The invention discloses a single-cylinder multi-point hot runner system, which is characterized in that a cavity is formed in a cylinder body, and an annular piston is arranged in the cavity; the annular piston is in sliding fit with the inner wall of an accommodating cavity and divides the accommodating cavity into an upper annular air cavity and a lower annular air cavity which are sealed respectively; an end cover is arranged at the opening of the cavity and is in sealed connection with the inner wall of the cavity; hot runners which are communicated with one another are arranged in a flowdividing plate, and the flow dividing plate is arranged below the cylinder body; a feeding nozzle is connected with the flow dividing plate, and an internal runner of the feeding nozzle is communicated with an inlet of each hot runner; a plurality of needle valves are arranged, each needle valve comprises a valve body and a valve needle; the upper end of the valve body is connected with the flow dividing plate, an internal runner of the valve body is communicated with the hot runner, and the valve bodies are uniformly arranged around the central axis of the annular piston; the upper end of thevalve needle is connected with the annular piston, and the lower end is inserted into the valve body; the lower end of the needle valve is connected with a pouring gate of the mold, and the valve needle is used for controlling opening and closing of the needle valve. According to the invention, the opening and closing of the needle valves can be synchronously controlled, so that the dynamic balance performance of an injection molding product is enabled to be higher.

Description

technical field [0001] The invention relates to the technical field of injection molding equipment, in particular to a single-cylinder multi-point hot runner system. Background technique [0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using injection molds. Products with a circular or centrally symmetrical divergent structure, such as fan pages, either have surface finish requirements, Either it is necessary to set up a transmission structure, so the injection hole cannot be set in the center of the product. When these products are injection molded, the glue feeding speed in all directions needs to be uniform and fast, so that the injection molding raw materials can be quickly and symmetrically distributed on the circumference or surrounding divergent structures. It is only the product that can meet ...

AI Technical Summary

Problems solved by technology

It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using injection molds. Products with a circular or centrally symmetrical divergent structure, such as fan pages, either have surface finish requirements, Either it is necessary to set up a transmission structure, so the injection hole cannot be set in the center of the product. When these products are injection molded, the glue feeding speed in all directions needs to be uniform and fast, so that the injection molding raw materials can be quickly and symmetrically distributed on the circumference or surrounding divergent structures. It is only the product that can meet the requirements of dynamic balance and static balance. The current injection molding machine cannot guarantee synchronization due to multiple needle valve drives, and the molding quality of each blade of the fan blade cannot be guaranteed to be consistent. This will affect the overall structure of the fan blade, resulting in poor rotational balance

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