Valve needle positioning nozzle core with material mixing function and hot nozzle with valve needle positioning nozzle core

Abstract

The valve needle positioning nozzle core with the material mixing function comprises a core body and a sleeve body, the core body and the sleeve body are provided with a first middle cavity and a second middle cavity respectively, the first middle cavity and the second middle cavity penetrate through the core body and the sleeve body respectively, and the core body is installed in the second middle cavity. The first middle cavity is used for allowing materials to penetrate through and positioning the valve needle, a containing cavity with the upper portion and the lower portion sealed is formed between the side wall of the middle of the core body and the side wall of the second middle cavity, and a first material hole and a second material hole which are communicated with the first middle cavity and the containing cavity are formed in the positions, located on the upper portion and the lower portion of the containing cavity, of the core body respectively. The core body and the sleeve body are matched to improve the concentricity of the valve needle, the sleeve body and the nozzle body when the valve needle works, so that the glue discharging speed of the hot nozzle and the state of a pouring gate of a product are favorably controlled, materials are mixed in the accommodating cavity to improve the uniform dispersion performance of the materials, the materials are prevented from being accumulated and the hot nozzle is prevented from being blocked, the discharging effect of the hot nozzle is improved, and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner injection hot nozzles, in particular to a valve needle positioning nozzle core with a material mixing function and a hot nozzle with the same. Background Art

[0002] In the field of hot runner injection molding, the valve needle is an important component in the needle valve hot runner. By controlling the opening and closing of the gate through the valve needle, it can ensure that the gate mark of the product is very small, improve the appearance and quality of the product, and improve or even eliminate the weld line.

[0003] However, during the operation of the valve needle, if the valve needle is not positioned to ensure its concentricity with the flow channel, the valve needle and the glue outlet hole will be out of center, resulting in loose glue sealing and damage to the mold gate. Therefore, the valve needle needs to be positioned through a corresponding structure. A copper-clad steel nozzle with a valve needle positioning structure with application number 202023060933.X discloses that a plurality of positioning blocks for positioning the valve needle are circumferentially arranged on the inner side wall of the flow channel in the steel core. The valve needle is positioned by multiple positioning blocks, and the valve needle keeps its axis straight when the melt flows, effectively avoiding the valve needle being offset by the melt, causing the mold gate to be enlarged and resulting in a short life. Although the concentricity of the valve needle is guaranteed, the liquid in this application flows directly downward after entering the nozzle, and the material cannot be sufficiently mixed, resulting in uneven material dispersion and large material blockage. Utility Model Content

[0004] The purpose of the utility model is to provide a valve needle positioning nozzle core with a mixing function and a hot nozzle having the same. The core body and the sleeve body cooperate to improve the concentricity of the valve needle with the sleeve body and the nozzle body when the valve needle is working, which is beneficial to control the hot nozzle glue discharge speed and the state of the product gate, and mix the materials in the accommodating cavity to improve the uniform dispersion performance of the materials, avoid material accumulation and hot nozzle clogging, improve the hot nozzle discharge effect, and ensure product quality.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a valve needle positioning nozzle core with a mixing function, including a core body and a sleeve body, both of which are respectively provided with a first middle cavity and a second middle cavity penetrating their respective bodies, the core body is installed in the second middle cavity, the first middle cavity is used for material passing through and valve needle positioning, and upper and lower sealed accommodating cavities are formed between the side walls of the middle part of the core body and the side walls of the second middle cavity, and the core body is respectively provided with a first material hole and a second material hole connecting the first middle cavity and the accommodating cavity at the upper and lower parts.

[0006] As a further optimization, the first middle cavity includes an upper bin, a middle bin and a lower bin connected from top to bottom, and the first material hole and the second material hole are respectively connected to the upper part and the lower part of the middle bin.

[0007] As a further optimization, the diameters of the middle chamber and the lower chamber are equal, and both are used to position the valve needle, and the diameter of the upper chamber is larger than the diameter of the middle chamber.

[0008] As a further optimization, the side wall of the upper bin is provided with a guide slope to facilitate material collection.

[0009] As a further optimization, the middle part of the side wall of the core body has an annular groove, and a receiving cavity is formed between the annular groove and the side wall of the second middle cavity; the first material hole and the second material hole are formed in the annular groove.

[0010] As a further optimization, the upper portion of the side wall of the core body has a convex portion, the upper portion of the side wall of the second middle cavity has a step, and the convex portion abuts against the step.

[0011] As a further optimization, the lower part of the side wall of the core body has a guiding slope, which facilitates the installation of the core body in the sleeve body.

[0012] As a further optimization, the first material hole and the second material hole are both inclined, and the inclined setting is conducive to the flow of materials and increases the impact force in the accommodating cavity through flow inertia.

[0013] As a further optimization, the number of the first material holes and the second material holes are both two to eight, and the two are arranged at intervals, preferably three of each.

[0014] The utility model also provides a hot nozzle, comprising a nozzle body, a nozzle head, and the valve needle positioning nozzle core with the mixing function.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The cooperation between the core body and the sleeve body can improve the concentricity of the valve needle with the sleeve body and the nozzle body when the valve needle is working, which is beneficial to control the glue discharge speed of the hot nozzle and the state of the gate of the product;

[0017] 2. The accommodating cavity between the core body and the sleeve body can achieve material mixing, improve the uniform dispersion of materials in the hot nozzle, avoid material accumulation and hot nozzle blockage, improve the discharge effect of the hot nozzle and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a valve needle positioning nozzle core with a mixing function of the utility model.

[0019] Figure 2 It is a cross-sectional view of the valve needle positioning nozzle core with mixing function of the utility model.

[0020] Figure 3 This is a structural diagram of the core of the valve needle positioning nozzle core with mixing function of the utility model.

[0021] Figure 4 It is a structural diagram of the sleeve body of the valve needle positioning nozzle core with mixing function of the utility model.

[0022] Figure 5 It is a cross-sectional schematic diagram of the hot nozzle of the utility model. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figures 1 to 3 As shown, a valve needle positioning nozzle core with a mixing function includes a core body 10 and a sleeve body 20, both of which are respectively provided with a first middle cavity 100 and a second middle cavity 200 that penetrate their respective bodies. The core body 10 is installed in the second middle cavity 200. The first middle cavity 100 is used for material passing through and valve needle positioning. An upper and lower sealed accommodating cavity 104 is formed between the side wall of the middle part of the core body 10 and the side wall of the second middle cavity 200. The core body 10 is located at the upper and lower parts of the accommodating cavity 104 and are respectively provided with a first material hole 10a and a second material hole 10b that connects the first middle cavity 100 and the accommodating cavity 104.

[0025] In the utility model, the molten material enters the first middle cavity. When the valve needle is present, the discharge channel of the molten material beside the first material hole is blocked. Therefore, the molten material must enter the accommodating cavity through the first material hole, and the mixing and dispersing function is realized in the accommodating cavity. When the valve needle moves upward, the second material hole in the lower part of the first middle cavity connected to the accommodating cavity is in an open state, and the mixed material in the accommodating cavity re-enters the lower part of the first middle cavity through the second material hole and is discharged. Therefore, the existence of the accommodating cavity realizes the mixing function. In addition, the core body is positioned by installing the core body in the sleeve body. When the sleeve body is installed in the nozzle body, the concentricity of the flow channel of the valve needle and the nozzle body can be improved.

[0026] Through the combination of the core body and the sleeve body, on the one hand, the concentricity of the valve needle with the sleeve body and the nozzle body can be improved when the valve needle is working, which is beneficial to control the glue discharge speed of the hot nozzle and the state of the product gate. On the other hand, it can improve the uniform dispersion of the molten material in the hot nozzle, avoid material accumulation and hot nozzle blockage, improve the discharge effect of the hot nozzle and ensure product quality.

[0027] Continue as Figure 2As shown, the first middle cavity 100 includes an upper bin 101, a middle bin 102 and a lower bin 103 connected from top to bottom, the first material hole 10a and the second material hole 10b are respectively connected to the upper and lower parts of the middle bin 102, the valve needle enters the first middle cavity, the diameters of the middle bin and the lower bin are equal and match the diameter of the valve needle, so as to realize the blocking of the flow channel feed channel, and when the valve needle extends into the lower bin, the material discharge channel is blocked; the diameter of the upper bin is larger than the diameter of the middle bin, and is not completely blocked by the valve needle, so that the material can smoothly enter the first middle cavity.

[0028] The side wall of the upper bin 101 is provided with a flow guiding slope 11 to facilitate the collection of the molten material.

[0029] like Figure 3 As shown, the middle part of the side wall of the core body 10 has an annular groove 10c, and a first abutting wall 131 and a second abutting wall 132 can be formed at the upper end and the lower end of the annular groove 10c respectively. The first abutting wall and the second abutting wall are respectively abutted against the inner wall of the second middle cavity to achieve sealing, and a accommodating cavity 104 is formed between the annular groove 10c and the side wall of the second middle cavity 200; the first material hole 10a and the second material hole 10b are formed in the annular groove 10c.

[0030] Combination Figure 4 As shown, the upper part of the side wall of the core body 10 has a convex part 100, and the upper part of the side wall of the second middle cavity 200 has a step 21. The convex part abuts against the step 21 through its lower end surface 12 to position the core body on the sleeve.

[0031] The lower part of the side wall of the core body is provided with a guiding slope 14, and the core body can be conveniently entered into the second middle cavity through the cooperation between the guiding slope and the port of the second middle cavity.

[0032] The first material hole 10a and the second material hole 10b are both inclined, which facilitates the material to enter the accommodating chamber through the first material hole, or to enter the second material hole from the accommodating chamber. In addition, the inclined setting can increase the impact of the material after entering the accommodating chamber, which is conducive to the distribution of materials and uniform mixing.

[0033] The number of the first material holes 10a and the second material holes 10b are both three, and the first material holes and the second material holes are arranged at intervals, which increases the mixing space of the materials in the containing cavity and improves the mixing effect.

[0034] like Figure 5 As shown, the utility model also provides a hot nozzle, including a nozzle body 40, a nozzle head 50, and the above-mentioned valve needle positioning nozzle core 1A with a mixing function. As can be seen from the figure, the valve needle extends into the nozzle body and into the first middle cavity. The positioning of the sleeve by the nozzle head and the nozzle body realizes the coaxial setting of the valve needle in the core body, which can ensure the concentricity of the valve needle relative to the nozzle body flow channel and improve the quality of the injection molded product.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. The valve needle positioning nozzle core with mixing function is characterized by: It includes a core body and a sleeve body, both of which are respectively provided with a first middle cavity and a second middle cavity penetrating their respective bodies. The core body is installed in the second middle cavity. The first middle cavity is used for material passing through and valve needle positioning. The side wall of the middle part of the core body and the side wall of the second middle cavity form an upper and lower sealed accommodating cavity. The core body is respectively provided with a first material hole and a second material hole connecting the first middle cavity and the accommodating cavity at the upper and lower parts of the accommodating cavity.

2. The valve needle positioning nozzle with mixing function according to claim 1, characterized in that: The first middle cavity includes an upper bin, a middle bin and a lower bin connected from top to bottom, and the first material hole and the second material hole are connected to the upper part and the lower part of the middle bin respectively.

3. The valve needle positioning nozzle with mixing function according to claim 2, characterized in that: The diameters of the middle chamber and the lower chamber are equal, and both are used to position the valve needle. The diameter of the upper chamber is greater than the diameter of the middle chamber.

4. The valve needle positioning nozzle with mixing function according to claim 3, characterized in that: The side wall of the upper bin is provided with a flow guiding slope.

5. The valve needle positioning nozzle with mixing function according to claim 1, characterized in that: An annular groove is provided in the middle of the side wall of the core body, and a receiving cavity is formed between the annular groove and the side wall of the second middle cavity; the first material hole and the second material hole are formed in the annular groove.

6. The valve needle positioning nozzle with mixing function according to claim 1, characterized in that: The upper part of the side wall of the core body has a convex part, the upper part of the side wall of the second middle cavity has a step, and the convex part abuts on the step.

7. The valve needle positioning nozzle with mixing function according to claim 1, characterized in that: The lower part of the side wall of the core body is provided with a guide slope.

8. The valve needle positioning nozzle with mixing function according to claim 1, characterized in that: The first material hole and the second material hole are both inclined.

9. The valve needle positioning nozzle with mixing function according to claim 8, characterized in that: The number of the first material holes and the second material holes are both two to eight, and the two are arranged at intervals.

10. Hot nozzle, characterized in that: The invention comprises a nozzle body, a nozzle head, and a valve needle positioning nozzle core with a mixing function as claimed in any one of claims 1 to 9.

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