Hot runner nozzle

Abstract

The utility model discloses a hot runner nozzle and relates to the technical field of hot runner nozzles. The hot nozzle comprises a hot nozzle body and a hot runner plate, a limiting ring is in sliding fit with the hot nozzle body, a plurality of limiting columns are axially arrayed at the bottom end of the limiting ring, and a threaded ring used for extruding the limiting ring to slide is in threaded fit with the hot nozzle body; a threaded hole is formed in the hot runner plate, the bottom end of the hot nozzle body is arranged in the threaded hole in a threaded fit mode, and the hot runner plate is provided with a limiting groove corresponding to the limiting column. According to the hot nozzle, the threaded section of the hot nozzle body is screwed into the threaded hole in the hot runner plate, the threaded ring is rotated to drive the limiting ring to slide on the hot nozzle body, the limiting column on the limiting ring is inserted into the limiting groove in the hot runner plate, rotation of the limiting ring is limited through the limiting column, and then the phenomenon that the hot nozzle body rotates and retreats is conveniently avoided; the connection stability of the hot nozzle body and the hot runner plate is influenced.

Description

Technical Field

[0001] The utility model belongs to the field of hot runner nozzles, in particular to a hot runner nozzle. Background Art

[0002] Compared with ordinary molds, hot runner molds have many advantages such as saving raw materials, improving product quality, short molding cycle, and reducing costs. Nowadays, hot runner technology is more and more widely used in injection molds. The hot runner systems currently sold on the market can be basically divided into two structures: integral hot runner systems and split hot runner systems. The integral hot runner system has the characteristics of convenient disassembly and assembly. The hot runner nozzle and the hot runner plate of the integral hot runner system are directly fixed by threaded connection. Such a hot runner system ensures the requirements of overall disassembly and installation. However, in order to ensure the connection strength requirements between the hot runner nozzle and the hot runner plate, it is necessary to ensure that there is a certain height of threaded connection between the hot runner nozzle and the hot runner plate, which requires the runner plate to have a large thickness, and the cost is relatively high. The thicker the hot runner plate, the more it will affect the mold design and processing size. At the same time, this structure will be difficult to disassemble the hot nozzle head during system maintenance.

[0003] A Chinese patent with application number CN201922090657.2 discloses a hot runner nozzle, including a nozzle body, a melt channel is arranged at the central position of the nozzle body, the nozzle body includes a polished rod section and a threaded section, the diameter of the threaded section is smaller than the diameter of the polished rod section, the threaded section is used to screw into the hot runner plate, the polished rod section is provided with a reinforcement device, the reinforcement device has two, respectively located on both sides of the nozzle body, the reinforcement device includes a moving block, a locking ring and a lifting mechanism, a vertical slide rail is arranged on the nozzle body, the moving block is installed in the vertical slide rail, the locking ring is hinged on the moving block, the lifting mechanism is installed on the moving block, the lifting mechanism is pressed down to push the moving block to slide upward in the vertical slide rail. The hot runner nozzle is connected to the hot runner plate by threads, which can ensure the connection strength between the hot runner nozzle and the hot runner plate without increasing the thickness of the hot runner plate. The hot runner nozzle in this application increases the rotational resistance of the nozzle body by a locking ring to reduce the probability of wire withdrawal from the nozzle body. The locking ring is a semicircular locking ring. Although the lateral protrusion on the locking ring can increase a certain friction force, it cannot guarantee that the nozzle body cannot rotate and cause wire withdrawal, and the reinforcement effect of the nozzle body is still not ideal.

[0004] In view of this, the present utility model is proposed. Summary of the invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a hot runner nozzle.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] A hot runner nozzle comprises a hot nozzle body and a hot runner plate;

[0008] The hot nozzle body is slidably matched with a limit ring, the bottom end of the limit ring is axially arrayed with a plurality of limit columns, and the hot nozzle body is threadedly matched with a threaded ring for squeezing the limit ring to slide;

[0009] The hot runner plate is provided with a threaded hole, and the bottom end of the hot nozzle body is threadedly engaged in the threaded hole. The hot runner plate is provided with a limiting groove corresponding to the limiting column. By screwing the threaded section of the hot nozzle body into the threaded hole on the hot runner plate, the threaded ring is rotated to drive the limiting ring to slide on the hot nozzle body, so that the limiting column of the limiting ring is inserted into the limiting groove on the hot runner plate, and then the limiting ring is limited in rotation by the limiting column, so as to avoid the phenomenon of self-rotation and wire withdrawal of the hot nozzle body.

[0010] Optionally, a threaded section is provided at the bottom end of the hot nozzle body, and the threaded section is threadedly fitted in the threaded hole. The outer diameter of the threaded section is smaller than the outer diameter of the hot nozzle body. A sealing ring is sleeved on the threaded section to facilitate screwing the threaded section of the hot nozzle body into the threaded hole on the hot runner plate, thereby facilitating quick connection between the hot nozzle body and the hot runner plate.

[0011] Optionally, a guide groove is provided on the lower part of the hot nozzle body along the height direction, and a guide protrusion is provided on the inner wall of the limit column. The guide protrusion is slidably fitted in the guide groove, so that the guide protrusion can slide in the guide groove to improve the sliding stability of the limit ring on the hot nozzle body, and the limit ring can limit the rotation of the hot nozzle body through the guide protrusion, thereby preventing the hot nozzle body from self-rotating and wire withdrawing.

[0012] Optionally, a convex ring is provided at the bottom end of the threaded ring, an annular raised portion is provided at the upper end of the limiting column, a bearing is provided in the annular raised portion, and the convex ring is fixed in the bearing.

[0013] Optionally, a plurality of anti-skid grooves are evenly distributed on the outer side of the threaded ring, so as to increase the friction force on the outer side of the threaded ring through the anti-skid grooves.

[0014] Optionally, an external thread is provided on the outer side of the lower part of the hot nozzle body, and the threaded ring is threadedly engaged with the lower part of the hot nozzle body, so that the threaded ring is threadedly engaged with the lower part of the hot nozzle body.

[0015] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0016] By screwing the threaded section of the hot nozzle body into the threaded hole on the hot runner plate, rotating the threaded ring drives the limit ring to slide on the hot nozzle body, so that the upper limit post of the limit ring is inserted into the limit groove on the hot runner plate, and then the rotation of the limit ring is limited by the limit post, thereby facilitating the prevention of self-rotation and wire withdrawal of the hot nozzle body, which affects the stability of the connection between the hot nozzle body and the hot runner plate.

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of a limiting ring according to an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of a threaded ring according to an embodiment of the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] Hot nozzle body 1, limiting ring 101, limiting column 102, threaded ring 103, threaded section 104, sealing ring 105, guide groove 106, guide protrusion 107, protruding ring 108, annular protrusion 109, bearing 110, hot runner plate 2, threaded hole 201, limiting groove 202.

[0025] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] The utility model will now be further described in detail with reference to the accompanying drawings.

[0027] See also Figure 1-4 As shown, in this embodiment, a hot runner nozzle is provided, including a hot nozzle body 1 and a hot runner plate 2;

[0028] The hot nozzle body 1 is slidably matched with a limit ring 101, and a plurality of limit columns 102 are arranged in an axial array at the bottom end of the limit ring 101. The hot nozzle body 1 is threadedly matched with a threaded ring 103 for squeezing the limit ring 101 to slide;

[0029] The hot runner plate 2 is provided with a threaded hole 201 , and the bottom end of the hot nozzle body 1 is threadedly engaged in the threaded hole 201 . The hot runner plate 2 is provided with a limiting groove 202 corresponding to the limiting column 102 .

[0030] By screwing the threaded section 104 of the hot nozzle body 1 into the threaded hole 201 on the hot runner plate 2, rotating the threaded ring 103 drives the limit ring 101 to slide on the hot nozzle body 1, so that the upper limit column 102 of the limit ring 101 is inserted into the limit groove 202 on the hot runner plate 2, and then the rotation of the limit ring 101 is limited by the limit column 102, so as to avoid the self-rotation and wire withdrawal phenomenon of the hot nozzle body 1, which affects the stability of the connection between the hot nozzle body 1 and the hot runner plate 2.

[0031] In this embodiment, a threaded section 104 is provided at the bottom end of the hot nozzle body 1. The threaded section 104 is threadedly fitted in the threaded hole 201, and the outer diameter of the threaded section 104 is smaller than the outer diameter of the hot nozzle body 1. A sealing ring 105 is sleeved on the threaded section 104, which facilitates screwing the threaded section 104 of the hot nozzle body 1 into the threaded hole 201 on the hot runner plate 2, facilitates quick connection between the hot nozzle body 1 and the hot runner plate 2, and facilitates increasing the sealing and stability of the connection between the hot nozzle body 1 and the hot runner plate 2 through the sealing ring 105.

[0032] In this embodiment, a guide groove 106 is provided at the lower part of the hot nozzle body 1 along the height direction, and a guide protrusion 107 is provided on the inner wall of the limiting column 102. The guide protrusion 107 is slidably fitted in the guide groove 106, so that the sliding stability of the limiting ring 101 on the hot nozzle body 1 is improved, and the limiting ring 101 is convenient for limiting the rotation of the hot nozzle body 1 through the guide protrusion 107, thereby facilitating the hot nozzle body 1 to rotate and withdraw the wire due to self-rotation, thereby affecting the stability of the connection between the hot nozzle body 1 and the hot runner plate 2.

[0033] In this embodiment, a convex ring 108 is provided at the bottom end of the threaded ring 103, and an annular protrusion 109 is provided at the upper end of the limiting column 102. A bearing 110 is provided in the annular protrusion 109, and the convex ring 108 is fixed in the bearing 110, so as to improve the stability of the synchronous sliding of the limiting ring 101 driven by the threaded ring 103 through the bearing 110.

[0034] In this embodiment, a plurality of anti-skid grooves are evenly distributed on the outer side of the threaded ring 103 , so as to increase the friction force on the outer side of the threaded ring 103 through the anti-skid grooves, thereby facilitating the user to rotate the threaded ring 103 .

[0035] In this embodiment, an external thread is provided on the outer side of the lower part of the hot nozzle body 1, and the threaded ring 103 is threadedly engaged with the lower part of the hot nozzle body 1, so that the threaded ring 103 can rotate and drive the limit ring 101 to slide synchronously.

[0036] Working principle: Put the sealing ring 105 on the threaded section 104 of the hot nozzle body 1, and then screw the threaded section 104 of the hot nozzle body 1 into the threaded hole 201 on the hot runner plate 2, rotate the threaded ring 103 to slide in the guide groove 106 through the guide protrusion 107, and drive the limit ring 101 to slide synchronously on the hot nozzle body 1, so that the upper limit column 102 of the limit ring 101 is inserted into the limit groove 202 on the hot runner plate 2, and then the limit ring 101 is limited to rotate through the limit column 102, and the limit ring 101 limits the rotation of the hot nozzle body 1 through the guide protrusion 107, so as to avoid the phenomenon of self-rotation and wire withdrawal of the hot nozzle body 1, which affects the stability of the connection between the hot nozzle body 1 and the hot runner plate 2.

[0037] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0038] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A hot runner nozzle, characterized in that: include: Hot nozzle body (1), hot runner plate (2); A limit ring (101) is slidably engaged on the hot nozzle body (1), a plurality of limit posts (102) are axially arranged in an array at the bottom end of the limit ring (101), and a threaded ring (103) is threadedly engaged on the hot nozzle body (1) for squeezing the limit ring (101) to slide; The hot runner plate (2) is provided with a threaded hole (201), the bottom end of the hot nozzle body (1) is threadedly engaged in the threaded hole (201), and the hot runner plate (2) is provided with a limiting groove (202) corresponding to the limiting column (102).

2. A hot runner nozzle according to claim 1, characterized in that: A threaded section (104) is provided at the bottom end of the hot nozzle body (1), the threaded section (104) is threadably engaged in the threaded hole (201), and the outer diameter of the threaded section (104) is smaller than the outer diameter of the hot nozzle body (1), and a sealing ring (105) is sleeved on the threaded section (104).

3. A hot runner nozzle according to claim 1, characterized in that: A guide groove (106) is provided at the lower part of the hot nozzle body (1) along the height direction, and a guide protrusion (107) is provided on the inner wall of the limiting column (102), and the guide protrusion (107) is slidably fitted in the guide groove (106).

4. A hot runner nozzle according to claim 1, characterized in that: A convex ring (108) is provided at the bottom end of the threaded ring (103), an annular raised portion (109) is provided at the upper end of the limiting column (102), a bearing (110) is provided in the annular raised portion (109), and the convex ring (108) is fixed in the bearing (110).

5. The hot runner nozzle according to claim 1, characterized in that: The outer side of the threaded ring (103) is evenly distributed with a plurality of anti-slip grooves.

6. A hot runner nozzle according to claim 1, characterized in that: An external thread is provided on the outer side of the lower part of the hot nozzle body (1), and the threaded ring (103) is threadably engaged with the lower part of the hot nozzle body (1).

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