Integral needle valve type hot runner

Abstract

The utility model is applicable to the technical field of hot runners, and provides an integral needle valve type hot runner, which comprises a splitter plate, a glue inlet is arranged at the top of the splitter plate, a plurality of hot nozzles are arranged at the bottom of the splitter plate, a nozzle core is arranged in each hot nozzle, and the nozzle core is arranged in the splitter plate. A runner for communicating the glue inlet with each nozzle core is arranged in the splitter plate, and heating wires are arranged on the upper surface and the lower surface of the splitter plate. According to the integral needle valve type hot runner, the plurality of hot nozzles are mounted on the splitter plate, and are uniformly heated by the heating wires on the surface of the splitter plate, so that heating rings of the hot nozzles are omitted, a space for mounting the heating rings does not need to be reserved on the surfaces of the hot nozzles, the lengths of the hot nozzles can be reduced, and the thickness of a template can be further reduced; and a small-tonnage injection molding machine can be used for carrying out injection molding processing on small workpieces, so that production is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot runner, and particularly relates to an integral needle valve type hot runner. Background Art

[0002] A hot runner is a heating component system used in an injection mold to inject molten plastic particles into the cavity of the mold. The hot runner system is divided into an open hot runner system and a valve needle type hot runner system. Among them, in the valve needle type hot runner system, the valve needle is often driven by a cylinder or an oil cylinder. By controlling the cylinder block, the valve needle can be driven to move, thereby controlling the opening and closing of the gate, achieving sealant, and making the gate smooth and flat.

[0003] The existing hot nozzle of the hot runner is heated by a heating coil on the surface. In order to install the heating coil on the surface of the hot nozzle, the hot nozzle needs to have sufficient length, which results in a larger length of the hot nozzle, and then a larger thickness of the template, making it inconvenient to inject small-sized workpieces. Only a larger-tonnage injection molding machine can be used for processing, and there are some deficiencies in use. Content of the Utility Model

[0004] The utility model provides an integral needle valve type hot runner, aiming to solve the problem that the existing hot nozzle is heated by a heating coil on the surface, which requires the hot nozzle to have sufficient length, resulting in a larger length of the hot nozzle, and then a larger thickness of the template, making it inconvenient to inject small-sized workpieces.

[0005] The utility model is realized as follows. An integral needle valve type hot runner includes a manifold. An inlet for injecting glue is provided at the top of the manifold. A plurality of hot nozzles are provided at the bottom of the manifold. A nozzle core is respectively arranged inside each hot nozzle. A flow channel for connecting the inlet for injecting glue with each nozzle core is arranged inside the manifold. Heating wires are arranged on the upper and lower surfaces of the manifold.

[0006] Preferably, the manifold is Y-shaped, the inlet for injecting glue is at the central position, and the plurality of hot nozzles are respectively at the ends of each Y-shaped branch.

[0007] Advantageous Effects

[0008] Compared with the prior art, the advantageous effects of the utility model are as follows: For the integral needle valve type hot runner of the utility model, a plurality of hot nozzles are installed on one manifold and uniformly heated by the heating wires on the surface of the manifold, eliminating the heating coil of the hot nozzle itself. There is no need to leave space for installing the heating coil on the surface of the hot nozzle, which can reduce the length of the hot nozzle, and then reduce the thickness of the template. A small-tonnage injection molding machine can be used to inject small-sized workpieces, which is more convenient for production. Description of the Drawings

[0009] Figure 1 Schematic structural diagram of the present utility model;

[0010] Figure 2 Schematic structural diagram in the present utility model;

[0011] Figure 3 Partial sectional structural diagram of the present utility model.

[0012] In the figure: 1 - shunt plate, 2 - glue inlet, 3 - runner, 4 - hot nozzle, 5 - nozzle core, 6 - heating wire. Specific embodiments

[0013] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further elaborates on the present utility model in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0014] Please refer to Figures 1-3 , the present utility model provides a technical solution: an integral needle valve type hot runner, including a shunt plate 1, a glue inlet 2 is arranged at the top of the shunt plate 1, a plurality of hot nozzles 4 are arranged at the bottom of the shunt plate 1, a nozzle core 5 is respectively arranged inside each hot nozzle 4, a runner 3 communicating the glue inlet 2 with each nozzle core 5 is arranged inside the shunt plate 1, and heating wires 6 are arranged on the upper and lower surfaces of the shunt plate 1.

[0015] The rubber material enters from the glue inlet 2, flows into each nozzle core 5 through the runner 3 respectively, and flows out through the runner and the glue outlet hole of the nozzle core 5 for injection molding processing.

[0016] In this embodiment, a plurality of hot nozzles 4 are installed on a shunt plate 1, and are uniformly heated by the heating wires on the surface of the shunt plate 1. The heating coil of the hot nozzle itself is cancelled, and there is no need to reserve space for installing the heating coil on the surface of the hot nozzle, which can reduce the length of the hot nozzle, and further reduce the thickness of the template. A small-tonnage injection molding machine can be used to perform injection molding processing on small workpieces, which is more convenient for production.

[0017] A through hole is provided at the position corresponding to the hot nozzle 4 at the top of the shunt plate 1. The through hole is communicated with the runner and the nozzle core 5. The valve pin is controlled by a cylinder. When the valve pin extends into the runner in the nozzle core 5 through the through hole to block the glue hole of the nozzle core 5, glue sealing is achieved. When the valve pin is controlled by the cylinder to disengage from the nozzle core 5, normal injection molding can be carried out. During the process, the valve pin always seals the through hole and will not leak glue. The above technical solution is the basic principle of the needle valve type hot runner and will not be elaborated here.

[0018] Further, the shunt plate 1 is Y-shaped, the glue inlet 2 is at the central position, and a plurality of hot nozzles 4 are respectively at the ends of each Y-shaped branch.

[0019] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An integral needle valve type hot runner, characterized in that: It includes a manifold plate (1), a glue inlet (2) is provided at the top of the manifold plate (1), a plurality of hot nozzles (4) are provided at the bottom of the manifold plate (1), a nozzle core (5) is respectively provided inside each hot nozzle (4), a flow channel (3) that connects the glue inlet (2) and each nozzle core (5) is provided inside the manifold plate (1), and heating wires (6) are provided on the upper and lower surfaces of the manifold plate (1).

2. The integrated needle valve type hot runner according to claim 1, wherein: The manifold plate (1) is Y-shaped, the glue inlet (2) is at the central position, and the plurality of hot nozzles (4) are respectively at the ends of each Y-shaped branch.

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