Double-step small hot nozzle

Abstract

The utility model relates to a double-step small hot nozzle, and belongs to the technical field of injection molding hot nozzles. Comprising a hot nozzle body, a fixedly connected nozzle tip is arranged at the bottom of the hot nozzle body, a runner is arranged in the hot nozzle body and extends from the top of the hot nozzle body to the bottom of the hot nozzle body, the nozzle tip is of an inverted conical structure, a plurality of inclined glue inlets are formed in the side wall of the nozzle tip and connected with the internal runner, and the nozzle tip is of a conical structure. The hot nozzle body is of a structure with a thick upper part and a narrow lower part, and a transition inclined surface is arranged at the middle section of the hot nozzle body; according to the scheme, the hot nozzle body is arranged to be of the structure with the thick upper portion and the narrow lower portion, the transition inclined face is arranged on the middle section, the stability of the hot nozzle body in a mold is improved, the whole hot nozzle body is of a step-shaped structure, and due to the fact that the bottom of the hot nozzle body is narrowed, the occupied space of the bottom of the hot nozzle body in the mold is correspondingly reduced; and the space occupied by the hot nozzle body in a mold is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection molding hot nozzle technical field relates to a small hot nozzle of two steps. BACKGROUND

[0002] In the structure of part injection mold, hot runner system is arranged in the mold, the plastic melt heated to the molten state is injected into the mold, after the shunt effect of hot runner system, the plastic raw material is injected into the molding cavity of the mold through the hot nozzle connected at the bottom, after the inside of the molding cavity is filled, after cooling and forming, the plastic part of specific structure is formed. Hot runner can keep the plastic sent to the sprue by injection machine nozzle in molten state, and does not need to be solidified as waste material to be taken out at each time of mold opening, and the melt retained in the gating system can be injected into the cavity when injected again. Therefore, the hot runner system has the advantages of saving raw materials, improving production efficiency, automation degree and the like.

[0003] The hot nozzle is connected with the bottom of the hot runner, is used for connecting the hot runner and the molding cavity, can inject the plastic melt in the hot runner into the molding cavity, but the hot nozzle structure in the prior art still has some deficiencies, when a plurality of molding cavities are arranged in the mold and the molding cavities are distributed densely, a plurality of hot nozzle mechanisms need to be arranged in the mold to realize glue feeding, since cooling channels need to be arranged on both sides close to the molding cavities in the mold to ensure that the inside of the molding cavity is cooled quickly, the cooling channels occupy the space close to the molding cavity part, and the hot nozzle structure in the prior art is relatively large in size, so that there is not enough space in the mold to place a sufficient number of hot nozzles. SUMMARY

[0004] The utility model discloses a small hot nozzle of two steps for the existing technical problem, and the technical problem to be solved by the utility model is how to reduce the volume of the hot nozzle structure.

[0005] The utility model discloses a small hot nozzle of two steps, which can realize the purpose that the volume of the hot nozzle structure is reduced.

[0006] In the scheme, the top of the hot nozzle body is connected with the hot runner, the nozzle tip at the bottom extends to the molding cavity and is connected with the inside of the molding cavity, the plastic melt heated to the molten state flows into the inside runner from the top of the hot nozzle body, and the melt is sprayed from the glue inlet at the bottom along the track of the runner; in the above structure, the hot nozzle body is arranged in the structure of wide top and narrow bottom, and a transition slope is arranged in the middle section, the stability of the hot nozzle body in the mold is improved, the hot nozzle body as a whole presents the stepped structure, the space occupied by the bottom of the hot nozzle body in the mold is correspondingly reduced, and the space occupied by the hot nozzle body in the mold is saved.

[0007] In the above-mentioned small hot nozzle with double steps, the outer side wall of the hot nozzle body is provided with an inwardly recessed mounting groove, and the mounting groove is internally provided with a fixed heating wire. The heating wire is fixedly arranged on the outer side wall of the hot nozzle body through the structure of the mounting groove, the heating wire generates heat after being electrified, the inside of the hot nozzle body is heated, and the plastic melt in the inside of the runner has better flowability.

[0008] In the above-mentioned small hot nozzle with double steps, the mounting groove is spirally arranged on the hot nozzle body, and the mounting groove at the top and the bottom of the hot nozzle body has more and more dense winding numbers. The mounting groove is concentratedly arranged at the top and the bottom of the hot nozzle body, the heating effect of the two ends of the hot nozzle body is improved, and the plastic melt flowing into and out of the hot nozzle body cannot be blocked.

[0009] In the above-mentioned small hot nozzle with double steps, the nozzle tip is provided with three glue inlets in total, the connection between the glue inlet and the runner is provided with a storage cavity, and the glue inlet extends obliquely upwards and is connected with the bottom of the storage cavity. The plastic melt at the bottom of the runner flows into the storage cavity first, and then flows into the three glue inlets respectively, and simultaneously feeds glue into the inside of the molding cavity, the storage cavity can improve the pressure in the inside of the nozzle tip, the flow rate of the glue feeding is faster, and the glue output is ensured to be sufficient.

[0010] In the above-mentioned small hot nozzle with double steps, the bottom of the hot nozzle body is provided with an annular gate sleeve, and the gate sleeve is arranged outside the nozzle tip. The gate sleeve plays a protection role and prevents the nozzle tip inside from colliding.

[0011] In the above-mentioned small hot nozzle with double steps, the bottom of the hot nozzle body is provided with a fixed part fixedly connected, and the outer side wall of the fixed part is in a hexagonal structure. The fixed part is used for fixing the position of the hot nozzle body in the mold and preventing the hot nozzle body from deflecting.

[0012] Compared with the prior art, the hot nozzle has the following advantages:

[0013] 1. In the scheme, the hot nozzle body is arranged as an upper thick and lower narrow structure, and a transition slope is arranged in the middle section, the stability of the hot nozzle body in the mold is improved, the hot nozzle body as a whole presents a stepped structure, since the bottom of the hot nozzle body is narrowed, the space occupied by the bottom in the mold is also correspondingly reduced, and the space occupied by the hot nozzle body in the mold is saved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 is Figure 1 a schematic diagram of the local enlarged structure in

[0016] Figure 3 is a schematic diagram of the front view half cut structure of the utility model.

[0017] In the figure, 1, hot nozzle body; 1a, transition slope; 1b, flow channel; 2, nozzle tip; 2a, glue inlet; 3, mounting groove; 3a, heating wire; 4, sprue bushing; 5, fixing part; 6, storage cavity. DETAILED DESCRIPTION

[0018] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0019] EMBODIMENT

[0020] As Figure 1 shown, the small hot nozzle with double steps comprises a hot nozzle body 1, the bottom of the hot nozzle body 1 is provided with a fixed nozzle tip, the nozzle tip is in an inverted conical structure, the hot nozzle body 1 is in an upper thick and lower narrow structure, the middle section of the hot nozzle body 1 is provided with a transition slope 1a, the outer side wall of the hot nozzle body 1 is provided with a recessed mounting groove 3, the mounting groove 3 is internally provided with a fixed heating wire 3a, the mounting groove 3 is spirally wrapped on the hot nozzle body 1, and the mounting grooves 3 at the top and bottom of the hot nozzle body 1 are more numerous and denser.

[0021] As Figure 2 shown, the side wall of the nozzle tip is provided with three glue inlets 2a, the bottom of the hot nozzle body 1 is provided with an annular sprue bushing 4, the sprue bushing 4 is arranged on the outer side of the nozzle tip, the bottom of the hot nozzle body 1 is provided with a fixed fixing part 5, the outer side wall of the fixing part 5 is in a hexagonal structure, and the fixing part 5 is arranged between the sprue bushing 4 and the hot nozzle body 1.

[0022] As Figure 3As shown, the inside of the hot nozzle body 1 is provided with a flow channel 1b extending from the top to the bottom of the hot nozzle body 1, the inside of the nozzle tip is provided with a storage cavity 6, the bottom of the flow channel 1b is connected with the storage cavity 6, the glue inlet 2a is obliquely arranged, the glue inlet 2a is inclined to the side of the nozzle tip center, and the top of the glue inlet 2a is connected with the bottom of the storage cavity 6.

[0023] The working principle of the present scheme is as follows, Figures 1-3 As shown, the top of the hot nozzle body 1 is connected with the hot flow channel 1b, the nozzle tip at the bottom extends to the molding cavity and is connected with the inside of the molding cavity, the plastic melt in the molten state is flowed into the flow channel 1b in the inside of the hot nozzle body 1 from the top of the hot nozzle body 1, the heating wire 3a arranged on the outside heats the hot nozzle body 1, so that the melt in the flow channel 1b keeps fluidity, the melt is flowed into the storage cavity 6 at the bottom, and then is injected into the molding cavity from the glue inlets 2a at the bottom at the same time, so as to ensure that the glue output is sufficient and the size of the nozzle tip is reduced. The hot nozzle body 1 is arranged in the structure of thick at the top and narrow at the bottom, and the transition slope 1a is arranged in the middle section, so as to improve the stability of the hot nozzle body 1 in the mold, and make the hot nozzle body 1 as a whole present the stepped structure. Since the bottom of the hot nozzle body 1 is narrow, the space occupied by the bottom of the hot nozzle body 1 in the mold is also reduced, so as to save the space occupied by the hot nozzle body 1 in the mold.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0025] Although the terms such as 1, hot nozzle body; 1a, transition slope; 1b, flow channel; 2, nozzle tip; 2a, glue inlet; 3, mounting groove; 3a, heating wire; 4, gate bushing; 5, fixing piece; 6, storage cavity are used more frequently herein, but the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any kind of additional limitation by interpreting them is contrary to the spirit of the present application.

Claims

1. A double-step small hot tip comprising a hot tip body (1), the bottom of which is provided with a fixed tip (2), the inside of which is provided with a flow channel (1b) extending from the top to the bottom of the hot tip body (1), characterized in that, The tip (2) is in an inverted conical structure, the side wall of the tip (2) is provided with several oblique glue inlets (2a), the glue inlets (2a) are connected with the internal flow channel (1b), the hot nozzle body (1) is in an upper thick and lower narrow structure, the middle section of the hot nozzle body (1) is provided with a transition inclined surface (1a).

2. A double stepped small size hot tip as claimed in claim 1, wherein, The outer side wall of the hot nozzle body (1) is provided with an inwardly recessed mounting groove (3), the mounting groove (3) is internally provided with a fixed heating wire (3a).

3. A double stepped miniature hot tip as defined in claim 2, wherein, The mounting groove (3) is spirally surrounded on the hot nozzle body (1), the mounting groove (3) of the top and bottom of the hot nozzle body (1) has more and more dense surrounding turns.

4. The double-step small-sized hot tip according to claim 1, wherein The tip (2) is provided with three glue inlets (2a) in total, the connection part of the glue inlets (2a) and the flow channel (1b) is provided with a storage cavity (6), the obliquely upward extension of the glue inlets (2a) is communicated with the bottom of the storage cavity (6).

5. The double-step small-sized hot tip according to claim 1, wherein The bottom of the hot nozzle body (1) is provided with an annular gate sleeve (4), the gate sleeve (4) is arranged outside the tip (2).

6. A double-step small hot tip according to claim 5, characterized in that The bottom of the hot nozzle body (1) is provided with a fixed fixing member (5), the outer side wall of the fixing member (5) is in a hexagonal structure.

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