Hot nozzle head assembly, hot nozzle structure

Abstract

The present invention specifically relates to a hot nozzle head assembly and a hot nozzle structure. The hot nozzle head assembly includes a hot nozzle head and a nozzle tip disposed at the bottom of the hot nozzle head. The hot nozzle head has a first flow channel extending along its axial direction, and the nozzle tip has a second flow channel extending along its axial direction and connected to the first flow channel. The first flow channel has a mainstream area connected to the aforementioned second flow channel, and an accumulation area located between the aforementioned mainstream area and the aforementioned inner wall of the hot nozzle head. The accumulation area is arranged near the aforementioned nozzle tip. The hot nozzle head assembly is provided with a diverter wall between the accumulation area and the mainstream area. The diverter wall is provided with a channel connecting the mainstream area and the accumulation area. The present invention achieves this by converging the yellowed and deteriorated resin plastic remaining on the inner wall of the hot nozzle head to the accumulation area along the inner wall of the hot nozzle head. The accumulation area is arranged near the aforementioned nozzle tip, and then the yellowed and deteriorated resin plastic gathered in the accumulation area flows to the mainstream area through the channel on the diverter wall for secondary fusion. It has the advantages of simple structure and high yield.

Description

Technical Field

[0001] The present invention relates to the technical field of mold processing, in particular to a hot nozzle head assembly and a hot nozzle structure. Background Art

[0002] At present, the injection mold commonly used in the injection molding industry is the hot runner injection mold. Compared with ordinary molds, the plastic products injected through the hot runner system are of higher quality, and the hot runner system has the advantages of saving raw materials, improving production efficiency, and a high degree of automation.

[0003] After long-term use, the resin near the inner wall of the nozzle tip will turn yellow and deteriorate. When this yellowed resin gathers together and is injected into the product, the surface of the product will become yellow and black. Therefore, it is necessary to study the nozzle tip assembly and nozzle structure to solve the above problems. Summary of the Invention

[0004] The present invention aims to provide a nozzle head assembly with a simple structure, easy processing and high yield.

[0005] To achieve the above objectives, one embodiment of the present invention provides a nozzle head assembly, comprising a nozzle head, a nozzle tip disposed at the bottom of the nozzle head, the nozzle head having a first flow channel extending along its axial direction, the nozzle tip having a second flow channel extending along its axial direction and communicating with the first flow channel, the first flow channel having a mainstream region communicating with the second flow channel, and a flow accumulation region located between the mainstream region and the inner wall of the nozzle head, the flow accumulation region being disposed near the nozzle tip;

[0006] The hot nozzle head assembly is provided with a diverter wall between the accumulation flow area and the main flow area, and the diverter wall is provided with a channel connecting the main flow area and the accumulation flow area.

[0007] As a further improvement of one embodiment of the present invention, part of the nozzle tip protrudes into the hot nozzle head to form the diverter wall, wherein the diverter wall and the inner wall of the hot nozzle head define the aforementioned flow accumulation area, and the upper part of the flow accumulation area has an opening.

[0008] As a further improvement of one embodiment of the present invention, the nozzle tip includes a nozzle tip body abutting against the bottom of the hot nozzle head, the top of the nozzle tip body extends upward and protrudes into the first flow channel to form the aforementioned diverter wall, wherein the diverter wall is spaced apart from the inner wall of the aforementioned hot nozzle head to define the aforementioned accumulation area.

[0009] As a further improvement of one embodiment of the present invention, the channel is a plurality of through holes arranged on the side wall of the diverter wall, and the accumulation area is connected to the mainstream area through the through holes, wherein the plurality of through holes are distributed at intervals along the circumference of the diverter wall.

[0010] As a further improvement of one embodiment of the present invention, the hot nozzle head is coaxially arranged with the nozzle tip, and the inner wall of the nozzle tip includes a first inner wall and a second inner wall from top to bottom, wherein the first inner wall is contracted in the top-down direction.

[0011] As a further improvement of an embodiment of the present invention, the intersection of the first inner wall and the second inner wall is lower than the bottom end of the hot nozzle head.

[0012] As a further improvement of one embodiment of the present invention, the height of the first inner wall in the longitudinal axis direction is greater than the height of the second inner wall in the longitudinal axis direction.

[0013] As a further improvement of one embodiment of the present invention, the bottom of the hot nozzle head and the top of the nozzle tip body are in a planar abutment relationship, wherein the aforementioned accumulation area is formed between the top of the nozzle tip body, the inner wall of the hot nozzle head and the outer wall of the diverter wall.

[0014] As a further improvement of one embodiment of the present invention, it also includes a pressure cap connecting the hot nozzle head and the nozzle tip, wherein a portion of the pressure cap is sleeved on the outer wall of the hot nozzle head, and another portion of the pressure cap is sleeved on the outer wall of the nozzle tip, and the outer wall of the hot nozzle head and the adjacent area of ​​the outer wall of the nozzle tip are aligned.

[0015] Another technical solution of the present invention is: a hot nozzle structure, including the hot nozzle head assembly as described above.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the nozzle head assembly and nozzle structure provided by the present invention divide the first flow channel into a main flow area connected to the aforementioned second flow channel and an accumulation flow area located between the aforementioned main flow area and the aforementioned nozzle head inner wall, so that the yellowed and deteriorated resin plastic remaining on the nozzle head inner wall is converged into the accumulation flow area along the nozzle head inner wall. The accumulation flow area is arranged near the aforementioned nozzle tip, which can ensure that as much yellowed and deteriorated resin on the nozzle head inner wall as possible enters the accumulation flow area, and then the yellowed and deteriorated resin plastic gathered in the accumulation flow area flows to the main flow area through the channel on the diversion wall for secondary fusion, thereby breaking up the yellowed and deteriorated resin and preventing it from gathering on the surface of the molded product, thereby reducing defects in the molded product, improving the yield rate, and reducing the defective rate. It has the advantages of simple structure, easy processing, and high yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the local structure of the hot nozzle structure of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the nozzle head assembly of the present invention;

[0019] Figure 3This is a schematic structural diagram of the nozzle head assembly of the present invention as viewed from the front;

[0020] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0021] In the figure: 1. Hot nozzle head; 11. First flow channel; 111. Main flow area; 112. Accumulated flow area; 2. Nozzle tip; 21. Second flow channel; 22. Nozzle tip body; 23. Diverter wall; 24. Through hole; 25. First inner wall; 26. Second inner wall; 3. Pressing cap; 4. Valve needle. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0023] The terms "including" and "having" and any variations thereof in the present invention are intended to cover non-exclusive inclusions. Reference to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] Combine Figure 1 As shown, the present invention primarily relates to a hot nozzle structure characterized by a nozzle body, a nozzle head assembly disposed at the bottom of the nozzle body, and a valve needle 4. The nozzle body and nozzle head assembly together form a flow channel, and the valve needle 4 controls the opening and closing of the flow channel. The hot nozzle structure is mounted on a mold plate, pouring molten resin plastic through the flow channel into the mold cavity.

[0025] Combine Figures 2 to 4 As shown, in this embodiment, the nozzle head assembly includes a nozzle head 1 extending along a longitudinal extension line, and a nozzle tip 2 disposed at the bottom of the nozzle head 1 and extending along the longitudinal extension line. The nozzle head 1 has a first flow channel 11 extending along its axial direction, and the nozzle tip 2 has a second flow channel 21 extending along its axial direction and communicating with the first flow channel 11. Preferably, both the first flow channel 11 and the second flow channel 21 extend from top to bottom.

[0026] In order to ensure the stability of the connection between the nozzle head 1 and the nozzle tip 2 , the first flow channel 11 has an area overlapping with the second flow channel 21 .

[0027] The first flow channel 11 comprises a main flow region 111 communicating with the second flow channel 21 and an accumulation region 112 located between the main flow region 111 and the inner wall of the nozzle head 1. The main flow region 111 is much larger than the accumulation region 112. The accumulation region 112 is positioned near the nozzle tip 2 to ensure that as much yellowed and deteriorated resin on the inner wall of the nozzle head 1 as possible enters the accumulation region 112.

[0028] The nozzle head assembly is provided with a diverter wall 23 between the accumulation flow area 112 and the main flow area 111. The diverter wall 23 is provided with a channel connecting the main flow area 111 and the accumulation flow area 112. The diverter wall 23 can be formed by extending the nozzle head 1, or by extending the nozzle tip 2, or it can be a separate component.

[0029] Resin plastic easily remains on the inner wall of the nozzle head 1, causing yellowing and deterioration. By setting up the accumulation area 112, the yellowed and deteriorated resin is guided into the accumulation area 112, and then enters the main flow area 111 through the channel on the diversion wall 23 for secondary fusion, so as to break up the yellowed and deteriorated resin and prevent it from gathering on the surface of the molded product, thereby reducing the defects of the molded product, improving the yield rate, and reducing the defective rate.

[0030] Furthermore, a portion of the nozzle tip 2 protrudes into the nozzle head 1 to form a diverter wall 23. The diverter wall 23 and the inner wall of the nozzle head 1 define the aforementioned accumulation zone 112, which has an opening at its top. It is understood that any yellowed, deteriorated resin plastic remaining on the inner wall of the nozzle head 1 flows along the inner wall of the nozzle head 1 through the upper opening of the accumulation zone 112 into the accumulation zone 112. The resin plastic collected in the accumulation zone 112 can also flow through the upper opening of the accumulation zone 112 into the main flow zone 111.

[0031] Specifically, in this embodiment, part of the nozzle tip 2 forms a diverter wall 23 , which extends into the nozzle head 1 , and part of the mainstream area 111 is the area where the first flow channel 11 and the second flow channel 21 overlap.

[0032] Furthermore, the nozzle tip 2 includes a nozzle tip body 22 that abuts the bottom of the nozzle head 1. The top of the nozzle tip body 22 extends upward and protrudes into the first flow channel 11 to form the aforementioned diverter wall 23. Preferably, the diverter wall 23 is coaxially arranged with the nozzle tip body 22 to improve the flow characteristics of the accumulation flow area 112 and the main flow area 111, while also facilitating processing.

[0033] The diverter wall 23 is spaced apart from the inner wall of the nozzle head 1 to define the aforementioned flow accumulation area 112. Specifically, the diverter wall 23 is arranged in an arc shape and is arranged on the inner side of the inner wall of the nozzle head 1. The diverter wall 23 is arranged parallel to the inner wall of the nozzle head 1.

[0034] Furthermore, the channels are multiple through-holes 24 provided on the sidewalls of the diverter wall 23. The accumulation zone 112 is connected to the main flow zone 111 via the through-holes 24. The through-holes 24 are spaced apart circumferentially along the diverter wall 23. When the yellowed and deteriorated resin enters the accumulation zone 112, it then passes through the multiple through-holes 24 in the diverter wall 23 and into the main flow zone 111 for secondary fusion.

[0035] Furthermore, the nozzle head 1 and nozzle tip 2 are coaxially arranged. The inner wall of the nozzle tip 2 includes, from top to bottom, a first inner wall 25 and a second inner wall 26. The first inner wall 25 is tapered from top to bottom. The first inner wall 25 is inclined. When yellowed and deteriorated resin enters the accumulation area 112 and then enters the main flow area 111 through the multiple through-holes 24 in the diversion wall 23, the inclined first inner wall 25 guides the resin flow.

[0036] Furthermore, the intersection of the first inner wall 25 and the second inner wall 26 is lower than the bottom end of the nozzle head 1 to improve the flow guiding effect of the first inner wall 25 .

[0037] Furthermore, the height of the first inner wall 25 in the longitudinal axis direction is greater than the height of the second inner wall 26 in the longitudinal axis direction, so as to further improve the flow guiding effect of the first inner wall 25 .

[0038] Furthermore, the bottom of the nozzle head 1 and the top of the nozzle tip body 22 are in a planar abutment relationship, and there is no gap between the bottom of the nozzle head 1 and the top of the nozzle tip body 22 to improve the continuity of the communication between the first flow channel 11 and the second flow channel 21.

[0039] The top of the nozzle body 22, the inner wall of the nozzle head 1, and the outer wall of the diverter wall 23 define the aforementioned accumulation zone 112. The inner wall of the nozzle head 1 and the outer wall of the diverter wall 23 are perpendicular to the top of the nozzle body 22, forming an annular accumulation zone 112.

[0040] Furthermore, the nozzle head assembly includes a pressure cap 3 that connects the nozzle head 1 and the nozzle tip 2. Part of the pressure cap 3 is sleeved onto the outer wall of the nozzle head 1, while another part is sleeved onto the outer wall of the nozzle tip 2. The adjacent areas of the outer walls of the nozzle head 1 and the nozzle tip 2 are aligned. The pressure cap 3 provides both thermal insulation and connection, with the majority of the pressure cap 3 abutting against the outer wall of the nozzle head 1.

[0041] The outer wall of the nozzle head 1 is provided with an annular notch for mounting the pressure cap 3 .

[0042] Compared with the prior art, the nozzle head assembly and nozzle structure provided by the present invention divide the first flow channel 11 into a main flow area 111 connected to the aforementioned second flow channel 21 and an accumulation flow area 112 located between the aforementioned main flow area 111 and the inner wall of the nozzle head 1. The yellowed and deteriorated resin plastic remaining on the inner wall of the nozzle head 1 is converged to the accumulation flow area 112 along the inner wall of the nozzle head 1. The accumulation flow area 112 is arranged close to the aforementioned nozzle tip 2, which can ensure that as much yellowed and deteriorated resin on the inner wall of the nozzle head 1 as possible enters the accumulation flow area 112. The yellowed and deteriorated resin plastic gathered in the accumulation flow area 112 is then flowed to the main flow area 111 through the channel on the diversion wall 23 for secondary fusion, thereby breaking up the yellowed and deteriorated resin and preventing it from gathering on the surface of the molded product, thereby reducing defects in the molded product, improving the yield rate, and reducing the defective rate. It has the advantages of simple structure, easy processing, and high yield rate.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A nozzle head assembly, comprising a nozzle head and a nozzle tip disposed at the bottom of the nozzle head, wherein the nozzle head has a first flow channel extending along its axial direction, and the nozzle tip has a second flow channel extending along its axial direction and communicating with the first flow channel, characterized in that: The first flow channel comprises a main flow area communicating with the second flow channel, and a flow accumulation area located between the main flow area and the inner wall of the nozzle head, wherein the flow accumulation area is located near the nozzle tip; The nozzle head assembly is provided with a diverter wall between the accumulation flow area and the main flow area, and the diverter wall is provided with a channel connecting the main flow area and the accumulation flow area; The nozzle tip portion protrudes into the nozzle head to form the diverter wall, wherein the diverter wall and the inner wall of the nozzle head define the flow accumulation area, and the upper portion of the flow accumulation area has an opening; The nozzle tip includes a nozzle tip body abutting against the bottom of the nozzle head, the top of the nozzle tip body extending upward and protruding into the first flow channel to form the aforementioned diverter wall, wherein the diverter wall is spaced apart from the inner wall of the nozzle head to define the aforementioned flow accumulation area; The channels are a plurality of through holes provided on the side wall of the diverter wall, and the flow accumulation area is connected with the main flow area through the through holes, wherein the plurality of through holes are distributed at intervals along the circumference of the diverter wall.

2. The nozzle head assembly according to claim 1, characterized in that: The hot nozzle head is coaxially arranged with the nozzle tip, and the inner wall of the nozzle tip includes a first inner wall and a second inner wall in sequence from top to bottom, wherein the first inner wall is contracted in a top-down direction.

3. The nozzle head assembly according to claim 2, characterized in that: The intersection of the first inner wall and the second inner wall is lower than the bottom end of the hot nozzle head.

4. The nozzle head assembly according to claim 3, characterized in that: A height of the first inner wall in the longitudinal axis direction is greater than a height of the second inner wall in the longitudinal axis direction.

5. The nozzle head assembly according to claim 1, characterized in that: The bottom of the nozzle head and the top of the nozzle tip body are in a planar abutment relationship, wherein the top of the nozzle tip body, the inner wall of the nozzle head and the outer wall of the diverter wall enclose the aforementioned flow accumulation area.

6. The nozzle head assembly according to claim 1, characterized in that: It also includes a pressure cap connecting the hot nozzle head and the nozzle tip, wherein a portion of the pressure cap is sleeved on the outer wall of the hot nozzle head, and another portion of the pressure cap is sleeved on the outer wall of the nozzle tip, and the outer wall of the hot nozzle head is aligned with the adjacent area of ​​the outer wall of the nozzle tip.

7. A hot nozzle structure, characterized in that: The hot nozzle head assembly comprises the hot nozzle head assembly according to any one of claims 1 to 6.

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