Embedded heating single-valve injection nozzle head structure

Abstract

The utility model relates to an embedded heating single-valve injection nozzle head structure, and belongs to the technical field of injection nozzle heads. Comprising a nozzle head body, a first runner and a second runner are arranged in the nozzle head body, the first runner and the second runner are arranged on the two sides of the top of the nozzle head body respectively, and the bottom of the first runner and the bottom of the second runner extend downwards obliquely towards the center of the nozzle head body and intersect at the bottom of the nozzle head body to form a glue inlet. An inlaying groove is formed in the outer side wall of the nozzle head body, the inlaying groove is in an undulating wave shape, and a heating wire is fixedly connected in the inlaying groove; according to the scheme, in the process that plastic melt flows in the nozzle head body or is stored in the nozzle head body, the heating wire embedded in the side wall of the nozzle head body can continuously heat, so that heat balance and temperature stability are kept in the nozzle head body, and internal melt cooling is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection nozzle head technical field relates to a kind of embedded heating's single valve injection nozzle head structure. BACKGROUND

[0002] Injection mold is a kind of device for producing plastic products, granular plastic raw materials are heated to molten state, after molten liquid is injected into mold, it will first pass through the shunt effect of hot runner, then flow into the hot nozzle connected at the bottom of hot runner, and injection nozzle head is a structure installed at the bottom of hot nozzle, which can inject molten plastic melt into the molding cavity of mold, when the molding cavity of mold is filled, it is rapidly cooled and shaped, the internal plastic melt is cooled and shaped, and the plastic product corresponding to the structure of molding cavity is formed. The structure of hot runner arranged inside the mold can keep the plastic sent to the sprue by hot nozzle in molten state, and does not need to be solidified as waste material when each time mold is opened, the molten material remaining in the gating system can be injected into the cavity when injected again.

[0003] However, the nozzle head structure in the prior art still has some deficiencies, the nozzle head is arranged near the molding cavity, and is far away from the hot runner, so that the molten liquid stored in the nozzle head is easily cooled during the mold opening process, the flow of molten liquid in the nozzle head is poor, and even internal blockage occurs, which requires a long time for re-heating, affecting the efficiency of injection molding. SUMMARY

[0004] The utility model discloses a kind of embedded heating's single valve injection nozzle head structure for the problems existing in prior art, and the technical problems to be solved by the utility model are: how to ensure the heat balance and temperature stability inside nozzle head.

[0005] The utility model discloses a kind of embedded heating's single valve injection nozzle head structure, including nozzle head body, the inside of nozzle head body is equipped with first flow channel and second flow channel, the first flow channel and second flow channel are respectively arranged in the top of nozzle head body Two sides, the bottom of the first flow channel and second flow channel extends towards the center of nozzle head body obliquely downwards, and meets to form glue inlet at the bottom of nozzle head body, the outer wall of nozzle head body is equipped with inlay groove, the inlay groove is in undulating " wave " shape, heating wire is equipped in the inlay groove.

[0006] In the scheme, the top of the nozzle body is connected with the hot nozzle, the molten plastic melt in the hot nozzle flows into the first flow channel and the second flow channel respectively, the melts in the two flow channels converge at the glue inlet at the bottom, and then are injected into the molding cavity of the mold, the heating wire embedded in the side wall of the nozzle body continuously generates heat during the flowing or storage of the molten plastic melt in the nozzle body, so that the heat balance and temperature stability of the nozzle body are maintained, and the internal melt cooling is avoided.

[0007] In the embedded heating single valve injection nozzle head structure, the bottom of the nozzle body is provided with an integrated connecting sprue bush, and the glue inlet is arranged in the inner center of the sprue bush. The sprue bush is used for connecting with the molding cavity of the mold, and the melt in the glue inlet is shot from the inside of the sprue bush.

[0008] In the embedded heating single valve injection nozzle head structure, the top of the nozzle body is provided with a hollow groove, and the hollow groove separates the first flow channel and the second flow channel on both sides of the nozzle body. The hollow groove is used for cooperating with the connecting rod of the piston.

[0009] In the embedded heating single valve injection nozzle head structure, vertical mounting holes are arranged at four corners of the nozzle body respectively, and the mounting holes penetrate the upper end and the lower end of the nozzle body. Long bolts can be inserted into the mounting holes to fix the nozzle body at the bottom of the hot nozzle.

[0010] In the embedded heating single valve injection nozzle head structure, the two ends of the inlaid groove extend downward to the bottom of the outer side wall of the nozzle body, and the two ends of the heating wire extend downward from the bottom of the nozzle body. The inlaid groove is a complete curve structure, and the two ends of the first heating wire are connected out of the bottom of the nozzle body for convenient wiring.

[0011] In the embedded heating single valve injection nozzle head structure, a vertical thermocouple mounting groove is arranged between the two ends of the inlaid groove, and the thermocouple mounting groove is also inlaid in the outer side wall of the nozzle body. The thermocouple mounting groove can detect the temperature in the nozzle body and play a detection role.

[0012] Compared with the prior art, the embedded heating single valve injection nozzle head structure has the following advantages:

[0013] 1. In the scheme, the heating wire embedded in the side wall of the nozzle body continuously generates heat during the flowing or storage of the molten plastic melt in the nozzle body, so that the heat balance and temperature stability of the nozzle body are maintained, and the internal melt cooling is avoided.

[0014] 2. In this design, the first and second flow channels are respectively set on both sides of the nozzle body, which can reduce the flow rate of the melt inside a single flow channel and bring the melt closer to the heating wire on the outer wall, so that it can be heated and heated better. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a frontal half-sectional structural diagram of the present invention.

[0017] In the figure, 1 is the nozzle body; 1a is the mounting hole; 2 is the inlay groove; 2a is the heating wire; 3 is the clearance groove; 4 is the thermocouple mounting groove; 5 is the sprue sleeve; 6 is the first runner; 7 is the second runner; and 8 is the glue inlet. 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 As shown, the embedded heating single-valve injection nozzle head structure includes a nozzle body 1. Vertical mounting holes 1a are provided at the four corners of the nozzle body 1, penetrating the upper and lower ends of the nozzle body 1. An inlay groove 2 is provided on the outer wall of the nozzle body 1, the inlay groove 2 being undulating and wave-like. A heating wire 2a is fixedly installed within the inlay groove 2. Both ends of the inlay groove 2 extend downwards to the bottom of the outer wall of the nozzle body 1. Both ends of the heating wire 2a extend downwards from the bottom of the nozzle body 1. A vertical thermocouple mounting groove 4 is provided between the two ends of the inlay groove 2, and the thermocouple mounting groove 4 is also embedded inside the outer wall of the nozzle body 1. A clearance groove 3 is provided at the top of the nozzle body 1, dividing the top of the nozzle body 1 into left and right parts. An integrally connected gate sleeve 5 is provided at the bottom of the nozzle body 1.

[0021] like Figure 2 As shown, the nozzle body 1 has a first flow channel 6 and a second flow channel 7 inside. The first flow channel 6 and the second flow channel 7 are respectively located on the top two sides of the nozzle body 1. The bottom of the first flow channel 6 and the second flow channel 7 extend obliquely downward toward the center of the nozzle body 1 and converge at the bottom of the nozzle body 1 to form a glue inlet 8. The glue inlet 8 is located at the center of the inside of the sprue sleeve 5.

[0022] The working principle of this solution is as follows: Figures 1-2As shown, the top of the nozzle body 1 is connected with the hot nozzle, the molten plastic melt in the hot nozzle flows into the first flow channel 6 and the second flow channel 7 respectively, the melts in the two flow channels converge at the glue inlet 8 at the bottom, and are injected into the molding cavity from the nozzle bush 5 connected with the bottom. During the process of storing the plastic melt inside the nozzle body 1, the heating wire 2a embedded in the sidewall of the nozzle body 1 and the thermocouple installation groove 4 will constantly heat, so that the inside of the nozzle body 1 keeps heat balance and temperature stability, and the internal melting is prevented from cooling down.

[0023] 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 replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0024] Although the terms such as 1, nozzle body; 1a, mounting hole; 2, embedded groove; 2a, heating wire; 3, air avoidance groove; 4, thermocouple installation groove; 5, nozzle bush; 6, first flow channel; 7, second flow channel; 8, glue inlet are used more frequently herein, but the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. An embedded heating single valve nozzle tip structure comprising a nozzle tip body (1) having a first flow channel (6) and a second flow channel (7) inside the nozzle tip body (1) and disposed on both sides of the top of the nozzle tip body (1), characterized in that, The bottom of the first flow channel (6) and the second flow channel (7) extends obliquely downward to the center of the nozzle body (1) and converges at the bottom of the nozzle body (1) to form a glue inlet (8), the outer side wall of the nozzle body (1) is provided with an inlaid groove (2), the inlaid groove (2) is in a wavy shape, and the inlaid groove (2) is provided with a fixed heating wire (2a).

2. An embedded heated single valve nozzle tip structure according to claim 1, wherein, The bottom of the nozzle body (1) is provided with an integrally connected pouring bush (5), and the glue inlet (8) is arranged at the inner center of the pouring bush (5).

3. An embedded heated single valve nozzle tip structure according to claim 1, wherein, The top of the nozzle body (1) is provided with a clearance groove (3), and the first flow channel (6) and the second flow channel (7) are separated on both sides of the nozzle body (1).

4. An embedded heated single valve nozzle tip structure according to claim 3, wherein, The four corners of the nozzle body (1) are respectively provided with vertical mounting holes (1a), and the mounting holes (1a) penetrate through the upper and lower ends of the nozzle body (1).

5. An embedded heated single valve nozzle tip structure according to claim 1, wherein, The two ends of the inlaid groove (2) extend downward to the bottom of the outer side wall of the nozzle body (1), and the two ends of the heating wire (2a) extend downward from the bottom of the nozzle body (1).

6. An embedded heated single valve nozzle tip structure according to claim 5, wherein, The two ends of the inlaid groove (2) are provided with a vertical thermocouple mounting groove (4), and the thermocouple mounting groove (4) is also inlaid in the inner side wall of the nozzle body (1).

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