Heating valve needle bushing assembly of single-nozzle oil cylinder system

Abstract

The utility model relates to the technical field of mechanical molds, in particular to a heating valve needle bush assembly of a single-nozzle oil cylinder system. The heating body is arranged inside, the heating valve needle bush is installed at the bottom of the heating body, the nozzle assembly is arranged at the bottom of the heating valve needle bush, a valve needle controlled by a piston assembly to move up and down is arranged in the heating valve needle bush, and a plastic runner communicated with a plastic inlet is formed in the heating body. A runner which is communicated with the plastic runner and is communicated with the nozzle runner at the same time is formed in the heating valve needle bushing, the plastic runner is shunted to two sides along the plastic inlet, and the shunted runner is arranged outside the valve needle. The hot runner system has the beneficial effects that the structure of the heating valve needle bushing is added, and the heat distribution performance of a heating element is optimized, so that the system can be matched with more plastic materials, and the stability of the temperature of a plastic body in the hot runner system is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical molds, in particular to a heating valve needle bushing component of a single nozzle oil cylinder system. Background Art

[0002] The single-nozzle hydraulic cylinder hot runner system is a hot runner system that does not contain a hot runner plate structure and can independently solve the injection molding process. It is widely used in small-batch plastic products with fast product cycles and a high variety of plastic materials. Due to its relatively low economic cost, it is often used as a test mold for large-scale plastic molds. These unique market demands require a simple structure, stable performance, wide adaptability to plastic materials, and simple installation and maintenance for the single-nozzle hot runner system. These requirements are a huge challenge for hot runners. The single-nozzle hydraulic cylinder hot runner system adds an additional pressure cylinder system to the single-nozzle system. On the one hand, this pressure cylinder system provides a channel for plastic flow, and on the other hand, it needs to provide pressure to open and close the gate. Through the up and down movement of the needle valve, the molded part is injected with glue from the center of the mold, thereby achieving the best molding surface effect for the molded part.

[0003] In the prior art, the stability of the plastic in the hot runner system is not high, and the temperature of the internal plastic is difficult to balance, resulting in low product yield.

[0004] Therefore, it is necessary to design a single nozzle cylinder system heating valve needle bushing assembly to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a single nozzle oil cylinder system heating valve needle bushing assembly to overcome the above-mentioned shortcomings of the current prior art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A single-nozzle oil cylinder system heating valve needle bushing assembly, which includes a heating body placed inside, a heating valve needle bushing installed at the bottom of the heating body, and a nozzle assembly arranged at the bottom of the heating valve needle bushing. A valve needle is arranged in the heating valve needle bushing and is controlled to move up and down by a piston assembly. A glue inlet is provided at the top of the heating body, and a plastic flow channel connected to the glue inlet is provided in the heating body. A flow channel connected to the plastic flow channel and the nozzle flow channel is provided in the heating valve needle bushing. The plastic flow channel is split to both sides along the glue inlet, and the split flow channel is placed outside the valve needle. The valve needle is placed in the middle of the interior of the heating body.

[0008] Preferably, the piston assembly is placed outside the heating body.

[0009] Preferably, a mounting plate is further provided on the outer side of the piston assembly.

[0010] Preferably, the valve needle is placed in the flow channel of the nozzle, and the valve needle passes through the heating valve needle bushing.

[0011] Preferably, a positioning ring is provided on the outside of the upper portion of the heating body, and the positioning ring is embedded between the heating body and the mounting plate.

[0012] The beneficial effects of this utility model are as follows: This technical solution adds a heated valve needle bushing structure, optimizes the heat distribution performance of the heating element, enables the system to be compatible with a wider range of plastic materials, and improves the temperature stability of the plastic body within the hot runner system; it also makes the hot runner system more stable, expands the system's operating range, and maximizes mold space utilization. It also optimizes the overall temperature balance of the hot runner cavity, ensures smoother movement of the valve needle within the plastic cavity, and better meets the requirements of different injection molding processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a heating valve needle bushing assembly for a single nozzle oil cylinder system of the utility model;

[0014] In the figure: 1. Heating body; 2. Heating valve needle bushing; 3. Nozzle assembly; 4. Piston assembly; 5. Valve needle; 11. Glue inlet; 12. Plastic flow channel; 13. Flow channel; 6. Mounting plate; 7. Positioning ring. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0017] Reference Figure 1 A single-nozzle oil cylinder system heated valve needle bushing assembly includes a heating body 1 placed inside, a heated valve needle bushing 2 installed at the bottom of the heating body, and a nozzle assembly 3 arranged at the bottom of the heated valve needle bushing;

[0018] The heating valve needle bushing 2 is provided with a valve needle 5 which is controlled to move up and down by a piston assembly 4; and the piston assembly is placed outside the heating body;

[0019] A glue inlet 11 is provided on the top of the heating body 1, and a plastic flow channel 12 connected to the glue inlet is provided in the heating body, and a flow channel 13 connected to the plastic flow channel and the nozzle flow channel is provided in the heating valve needle bushing;

[0020] The plastic flow channel is divided into two sides along the plastic inlet, and the divided flow channel is placed outside the valve needle; the valve needle is placed in the middle of the interior of the heating body,

[0021] In order to facilitate the installation of the heating body and the piston assembly, a mounting plate 6 is further provided on the outside of the piston assembly;

[0022] The valve needle 5 is placed in the flow channel of the nozzle, and the valve needle 5 passes through the heating valve needle bushing 2;

[0023] In order to be able to fit and fix the entire heating body 1, the piston assembly 4 and the mounting plate 6, a positioning ring 7 is provided on the upper portion of the heating body, and the positioning ring is embedded between the heating body 1 and the mounting plate;

[0024] In this embodiment, after the plastic is ejected from the nozzle of the injection machine, it passes through the plastic flow channel in the heating body, enters the heated valve needle bushing, and then flows to the hot runner parts such as the hot nozzle before being formed in the customer's mold cavity. In this process, when the air is taken in and out of the air path, it drives the piston to move up and down, and the valve needle is installed on the piston. When the piston moves, the valve needle also moves relatively, thereby closing and opening the gate. The valve needle and the heated valve needle bushing are precisely matched, which can not only ensure the smooth movement of the valve needle without jamming the valve needle, but also ensure that the plastic does not overflow from the valve needle and the heated valve needle bushing, preventing leakage. The heated valve needle bushing makes the temperature of the plastic body in the hot runner cavity more balanced, thereby obtaining good plastic product quality.

[0025] The benefits of this utility model include the addition of a heated valve pin bushing, which optimizes the heat distribution of the heating element, allowing the system to accommodate a wider range of plastic materials and achieving greater temperature stability within the hot runner system. This also enhances the stability of the hot runner system, expands its range, and maximizes mold space utilization. It also optimizes the overall temperature balance of the hot runner cavity, ensuring smoother movement of the valve pin within the plastic cavity and meeting the requirements of various injection molding processes.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heated valve needle bushing assembly for a single nozzle oil cylinder system, characterized by: It includes a heating body placed inside, a heating valve needle bushing installed at the bottom of the heating body, and a nozzle assembly arranged at the bottom of the heating valve needle bushing. A valve needle that is controlled to move up and down by a piston assembly is arranged in the heating valve needle bushing. A glue inlet is provided at the top of the heating body, and a plastic flow channel connected to the glue inlet is provided in the heating body. A flow channel connected to the plastic flow channel and the nozzle flow channel is provided in the heating valve needle bushing. The plastic flow channel is diverted to both sides along the glue inlet, and the diverted flow channel is placed outside the valve needle. The valve needle is placed in the middle of the interior of the heating body.

2. A heated valve needle bushing assembly for a single nozzle oil cylinder system according to claim 1, characterized in that: The piston assembly is placed outside the heating body.

3. The heated valve needle bushing assembly for a single nozzle oil cylinder system according to claim 1, characterized in that: A mounting plate is also provided on the outer side of the piston assembly.

4. The heated valve needle bushing assembly for a single nozzle oil cylinder system according to claim 1, characterized in that: The valve needle is placed in the flow channel of the nozzle, and the valve needle passes through the heating valve needle bushing.

5. The heated valve needle bushing assembly for a single nozzle oil cylinder system according to claim 1, characterized in that: A positioning ring is arranged outside the upper portion of the heating body, and the positioning ring is embedded between the heating body and the mounting plate.

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