Double-end hot nozzle capable of saving mold space

Abstract

The utility model relates to a double-end hot nozzle capable of saving mold space, and belongs to the technical field of hot runners. Comprising a hot nozzle body, a feeding port is formed in the top of the hot nozzle body, a feeding runner connected with the feeding port is arranged in the hot nozzle body, the bottom of the feeding runner is divided into a first sub-runner and a second sub-runner towards the two sides, and the first sub-runner and the second sub-runner extend downwards to the two sides of the bottom of the hot nozzle body correspondingly; the two sides of the bottom of the hot nozzle body are provided with fixedly-connected sprue bushes, the sprue bushes are internally provided with fixedly-connected nozzle tips, the nozzle tips are internally provided with a plurality of material injection runners, the bottoms of the nozzle tips are of inverted conical structures, and the bottoms of the material injection runners are arranged on the side walls of the bottoms of the nozzle tips; according to the scheme, the structure of the nozzle tip is arranged to be the inverted cone structure, the size of the nozzle tip can be effectively reduced, the space occupied by the feeding part at the bottom of the hot nozzle body on a mold is smaller, more cavities can be formed in the mold, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding hot runner technology, and relates to a double-headed hot runner that saves mold space. Background Technology

[0002] Injection molds are devices used to produce plastic products. Molten plastic, heated to a molten state, is injected into the molding cavity and cooled to form a plastic part with a specific structure. In the structure of an injection mold, the molten plastic is diverted by a manifold and then injected into the molding cavity of the mold through a hot nozzle connected to the bottom. The hot runner allows the plastic delivered from the injection nozzle to the gate to always remain in a molten state, so it does not need to be solidified and removed as waste material each time the mold is opened. The molten material remaining in the gating system can be injected into the cavity again during the next injection.

[0003] To increase production speed, product molds typically have multiple gates, each corresponding to a hot runner, with multiple hot runners connected by a manifold. Raw material enters the hot runner through the manifold, then flows through the nozzle tip and gate into the mold cavity. For some smaller products, to save costs and improve production efficiency, the mold cavities are densely distributed, resulting in smaller distances between gates. However, due to the relatively large size of hot runners in existing technologies, it's impossible to achieve a one-to-one correspondence between hot runners and gates; the number of gates must be reduced, leading to decreased production efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the current technology by proposing a space-saving double-headed hot nozzle. The technical problem to be solved by this invention is: how to reduce the space occupied by the nozzle in the mold.

[0005] The objective of this utility model can be achieved through the following technical solution: a space-saving double-headed hot nozzle, comprising a hot nozzle body, a feed port at the top of the hot nozzle body, a feed channel connected to the feed port inside the hot nozzle body, the bottom of the feed channel branching into a first branch channel and a second branch channel, the first branch channel and the second branch channel extending downward to the bottom sides of the hot nozzle body respectively, a sprue sleeve fixedly connected to the bottom sides of the hot nozzle body, a nozzle tip fixedly connected inside the sprue sleeve, a plurality of injection channels inside the nozzle tip, the bottom of the nozzle tip having an inverted conical structure, and the bottom of the injection channels being disposed on the bottom sidewall of the nozzle tip.

[0006] In this design, the hot nozzle body is located at the connection between the hot runner and the molding cavity. Molten plastic material in the hot runner is injected into the feed channel from the inlet, flows to the first and second branch channels on both sides at the bottom of the feed channel, and finally is injected into the molding cavity from the injection channel inside the nozzle tip. In the above structure, the molten plastic can be ejected from the side wall at the bottom of the nozzle tip to fill the cavity. The nozzle tip is designed as an inverted cone structure, which can effectively reduce the volume of the nozzle tip, so that the feeding part at the bottom of the hot nozzle body occupies less space on the mold, allowing more cavities to be set on the mold and improving production efficiency.

[0007] In the aforementioned space-saving dual-head hot runner, the top of the nozzle tip is provided with a storage cavity. The top of the storage cavity is connected to either a first or second flow channel, and the bottom of the storage cavity is connected to the injection channel. The molten metal in the first and second flow channels first flows to fill the storage cavity and then flows into the injection channel, which can increase the pressure inside the nozzle and increase the flow rate of the molten metal.

[0008] In the aforementioned space-saving dual-head hot runner, each runner tip has three injection channels. Each injection channel is angled inside the runner tip, with its top close to the center of the runner tip. The three injection channels simultaneously feed material into the cavity, increasing the feeding speed, and the angled arrangement of the channels facilitates the injection of molten metal into the cavity.

[0009] In the aforementioned space-saving double-headed hot nozzle, the top of the hot nozzle body is provided with an outwardly protruding annular edge, and one side of the annular edge is provided with a limiting part. The annular edge is used to fix the position of the nozzle head, and the limiting part makes the annular edge have an incomplete circular structure to prevent the hot nozzle body from deflecting.

[0010] In the aforementioned space-saving dual-head hot runner, the top of the hot runner body is a cylindrical structure, and the bottom of the hot runner body is a flat, elongated elliptical cylindrical structure, giving the hot runner body an overall shape that is wider at the top and narrower at the bottom. This structure reduces the volume of the bottom of the hot runner body, thus reducing the space it occupies in the mold.

[0011] In the aforementioned space-saving dual-head hot runner, a transition slope is provided at the connection between the cylindrical bottom and the elliptical cylinder top on the hot runner body. This transition slope reduces the stress on the nozzle tip during injection molding.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. In this solution, molten plastic can be sprayed out from the side wall at the bottom of the nozzle tip to fill the cavity. The nozzle tip is designed as an inverted cone structure, which can effectively reduce the volume of the nozzle tip and make the bottom feeding part of the hot nozzle body occupy less space on the mold, so that more cavities can be set on the mold and improve production efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 yes Figure 1 A magnified schematic diagram of the local structure;

[0016] Figure 3 This is a frontal half-sectional structural diagram of the present invention.

[0017] In the figure, 1 is the hot nozzle body; 1a is the ring edge; 1b is the limiting part; 1c is the transition slope; 2 is the sprue sleeve; 3 is the nozzle tip; 3a is the injection channel; 3b is the storage cavity; 4 is the feed port; 5 is the feed channel; 6 is the first branch channel; 7 is the second branch channel. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] Example

[0020] like Figure 1 Combination Figure 2 As shown, the space-saving double-headed hot nozzle includes a hot nozzle body 1. The top of the hot nozzle body 1 is provided with a ring edge 1a, and one side of the ring edge 1a is provided with a limiting part 1b. The top of the hot nozzle body 1 is a cylindrical structure, and the bottom of the hot nozzle body 1 is a flat and elongated elliptical cylinder structure, so that the hot nozzle body 1 has an overall structure that is wider at the top and narrower at the bottom. The connection between the bottom of the cylinder and the top of the elliptical cylinder on the hot nozzle body 1 is provided with a transition slope 1c. The bottom of the hot nozzle body 1 is provided with a fixed gate sleeve 2 on both sides. The gate sleeve 2 is provided with a fixed nozzle tip 3 inside. The nozzle tip 3 is provided with a plurality of injection channels 3a inside.

[0021] like Figure 3As shown, the top of the hot nozzle body 1 is provided with a feed inlet 4, and the interior of the hot nozzle body 1 is provided with a feed channel 5 connected to the feed inlet 4. The bottom of the feed channel 5 is divided into a first branch channel 6 and a second branch channel 7. The first branch channel 6 and the second branch channel 7 extend downward to the bottom sides of the hot nozzle body 1 and are connected to the nozzle tip 3. The top of the nozzle tip 3 is provided with a storage cavity 3b. The injection channel 3a is obliquely arranged inside the nozzle tip 3. The top of the injection channel 3a is close to the center of the nozzle tip 3, and the top of the injection channel 3a is connected to the storage cavity 3b.

[0022] The working principle of this solution is as follows: Figure 1-3 As shown, molten plastic raw material in the hot runner is injected into the feed channel 5 from the feed port 4. It flows to the first branch channel 6 and the second branch channel 7 on both sides at the bottom of the feed channel 5. When the molten plastic fills the storage cavity 3b inside the nozzle tip 3, the molten plastic can be sprayed out from the multiple injection channels 3a at the bottom at the same time to fill the cavity. The nozzle tip 3 is designed as an inverted cone structure, which can effectively reduce the volume of the nozzle tip 3, so that the bottom feeding part of the hot nozzle body 1 occupies less space on the mold, so that more cavities can be set on the mold, thus improving production efficiency.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document frequently uses terms such as 1. hot nozzle body; 1a. ring edge; 1b. limiting part; 1c. transition slope; 2. sprue sleeve; 3. nozzle tip; 3a. injection channel; 3b. storage cavity; 4. feed port; 5. feed channel; 6. first branch channel; 7. second branch channel, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A double-head hot nozzle saving mold space, comprising a hot nozzle body (1), a top of the hot nozzle body (1) is provided with a feeding port (4), an inside of the hot nozzle body (1) is provided with a feeding flow channel (5) connected with the feeding port (4), a bottom of the feeding flow channel (5) is divided into a first branch flow channel (6) and a second branch flow channel (7) on two sides, characterized in that, The first and second branch channels (6, 7) respectively extend downward to the two sides of the bottom of the hot nozzle body (1), and the two sides of the bottom of the hot nozzle body (1) are provided with fixed nozzle bushings (2), the inside of the nozzle bushing (2) is provided with a fixed nozzle tip (3), the inside of the nozzle tip (3) is provided with a plurality of material injection channels (3a), the bottom of the nozzle tip (3) is an inverted conical structure, and the bottom of the material injection channel (3a) is arranged on the sidewall of the bottom of the nozzle tip (3).

2. A space saving double head hot nozzle as claimed in claim 1, wherein, The top of the nozzle tip (3) is provided with a storage cavity (3b), the top of the storage cavity (3b) is connected with the first or second branch channel (6, 7), and the bottom of the storage cavity (3b) is connected with the material injection channel (3a).

3. A space saving double head hot nozzle as claimed in claim 2, wherein, The material injection channels (3a) on a single nozzle tip (3) are three, and a single material injection channel (3a) is arranged obliquely in the nozzle tip (3), and the top of the material injection channel (3a) is close to the central part of the nozzle tip (3).

4. The space saving double head hot nozzle of claim 1 wherein, The top of the hot nozzle body (1) is provided with an outwardly convex ring edge (1a), and one side of the ring edge (1a) is provided with a limiting portion (1b).

5. The space saving double head hot nozzle of claim 1 wherein, The top of the hot nozzle body (1) is a cylindrical structure, the bottom of the hot nozzle body (1) is a flat and long elliptical cylindrical structure, so that the whole hot nozzle body (1) has a structure of being wide at the top and narrow at the bottom.

6. A space saving double head hot nozzle as claimed in claim 5, wherein, The connecting position of the cylindrical bottom and the elliptical cylindrical top of the hot nozzle body (1) is provided with a transition inclined surface (1c).

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