Anti-rotation injection nozzle mechanism and injection nozzle plate structure

Abstract

The utility model discloses an anti-rotation injection nozzle mechanism and an injection nozzle plate structure, and belongs to the technical field of hot runner systems, the anti-rotation injection nozzle mechanism comprises an injection nozzle, a positioning piece is clamped on the injection nozzle, the positioning piece is provided with a positioning part extending away from the injection nozzle, the positioning part is provided with a positioning structure, and rotation of the positioning piece is limited through cooperation of a positioning piece and the positioning structure; rotation of the positioning piece is limited through cooperation of the positioning piece and the positioning structure, the positioning piece and the injection nozzle plate are tightly matched and cannot loosen, and therefore after the injection nozzle is installed, no rotation space exists, the better positioning effect can be achieved, the structure is not affected by injection temperature difference, and the service life of the injection nozzle is prolonged. The injection process and the stability of the whole structure are effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot runner systems, and particularly relates to an anti-rotation nozzle mechanism and a nozzle plate structure. Background Art

[0002] A hot runner system is a heated component used in injection molds to inject melted plastic particles into the mold cavity. In a hot runner system, the nozzle needs to be positioned circumferentially to ensure injection stability and prevent it from rotating.

[0003] To prevent nozzle rotation, existing technologies typically utilize the axial expansion and deformation of the nozzle structure, runner structure, and mounting plate when heated to press the nozzle against the nozzle plate. This method can easily subject the nozzle to unstable pressure due to temperature fluctuations, hindering circumferential nozzle rotation. This can affect injection stability and negatively impact the overall structure due to axial force design requirements. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an anti-rotation nozzle mechanism and a nozzle plate structure.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A nozzle mechanism for preventing rotation includes a nozzle with a positioning piece clamped on the nozzle. The positioning piece has a positioning portion extending away from the nozzle. The positioning portion is provided with a positioning structure. The rotation of the positioning piece is limited by the cooperation of a positioning member and the positioning structure.

[0007] In the present invention, the nozzle includes a nozzle body and a nozzle sleeve, the upper end of the nozzle body is installed in the nozzle sleeve, the lower end of the nozzle body extends outward from the bottom of the nozzle sleeve, and the positioning piece is clamped on the nozzle sleeve.

[0008] In the present invention, the nozzle sleeve has a positioning step, the outer peripheral surface of the positioning step is a snap-fit ​​surface, the positioning piece has a snap-fit ​​hole adapted to the snap-fit ​​surface, and the positioning piece is snap-fitted to the positioning step of the nozzle sleeve based on the cooperation between the snap-fit ​​hole and the snap-fit ​​surface.

[0009] In the present invention, the clamping surface is formed by combining two opposite arc surfaces and two opposite planes.

[0010] In the present invention, the nozzle sleeve is provided with a limiting step, the outer diameter of the limiting step is larger than the outer diameter of the positioning step, and a limiting surface for limiting the axial movement of the positioning piece is formed between the limiting step and the positioning step.

[0011] In the present invention, a nozzle sleeve flange is sleeved on the nozzle sleeve, and a spring washer for limiting the axial movement of the positioning piece is sleeved between the nozzle sleeve flange and the positioning step.

[0012] In the present invention, the positioning structure is a positioning hole or a positioning recess.

[0013] Based on the anti-rotation nozzle mechanism provided above, the utility model also provides a nozzle plate structure, including a nozzle plate and the above-mentioned nozzle mechanism, the nozzle plate has a nozzle mounting position, and the nozzle mechanism is installed in the nozzle mounting position.

[0014] In the present invention, the nozzle mounting position includes a first mounting position and a second mounting position connected up and down, the first mounting position is adapted to the positioning piece, the second mounting position is adapted to the nozzle, and a mounting surface is formed between the first mounting position and the second mounting position; the positioning piece is installed in the first mounting position and abuts the mounting surface, the nozzle is installed in the second mounting position and its lower end extends outward through the second mounting position.

[0015] In the present invention, the nozzle plate also has a third mounting position, which is connected to the first mounting position and can accommodate the positioning part, and the third mounting position has a mounting hole that can correspond to the positioning structure; the positioning part is installed in the third mounting position, and the positioning part is fixed in the third mounting position based on the cooperation between the positioning part, the positioning structure and the mounting hole.

[0016] The beneficial effects of the present invention are as follows: the rotation of the positioning piece is limited by the cooperation between the positioning member and the positioning structure, so that the positioning piece and the nozzle plate are tightly matched and the two will not be loose. Therefore, after the nozzle is installed, there is no rotation space, which can achieve a better positioning effect. In addition, this structure is not affected by the injection temperature difference, and effectively ensures the stability of the injection process and the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the nozzle mechanism of this embodiment

[0018] Figure 2 A three-dimensional diagram of the positioning sheet of this embodiment;

[0019] Figure 3 This is a front structural schematic diagram of the nozzle sleeve of this embodiment;

[0020] Figure 4 A three-dimensional diagram of the nozzle sleeve of this embodiment;

[0021] Figure 5 This is an overall schematic diagram of the nozzle plate structure installation of this embodiment;

[0022] Figure 6 A top view of the nozzle plate structure installed in this embodiment;

[0023] Figure 7 A top view of the nozzle plate of this embodiment;

[0024] Figure 8 for Figure 7 Cross-sectional view of the middle section AA. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] like Figures 1 to 8 As shown, this embodiment discloses an anti-rotation nozzle mechanism, including a nozzle 1, with a positioning piece 2 clamped on the nozzle 1. The positioning piece 2 has a positioning portion 22 extending away from the nozzle 1, and the positioning portion 22 is provided with a positioning structure 23, wherein the positioning structure 23 is a positioning hole or a positioning recess. The positioning piece 3 cooperates with the positioning structure 23 to prevent the positioning piece 2 from rotating. The positioning piece 2 is circumferentially positioned and connected to the nozzle 1. In this embodiment, the positioning piece 3 is a positioning pin. The nozzle mechanism of this embodiment, through the positioning piece 3 and the positioning structure, is tightly fitted between the positioning piece 2 and the nozzle plate 4, and the two will not be loose. Therefore, after the nozzle 1 is installed, there is no room for rotation, which can achieve a better positioning effect and effectively ensure the stability of the injection process and the overall structure.

[0029] In this embodiment, the nozzle 1 includes a nozzle body 11 and a nozzle sleeve 12. The upper end of the nozzle body 11 is installed in the nozzle sleeve 12, and the lower end of the nozzle body 11 extends outward from the bottom of the nozzle sleeve 12. The positioning piece 2 is clamped on the nozzle sleeve 12.

[0030] In this embodiment, the nozzle sleeve 12 has a positioning step 121, the outer peripheral surface of the positioning step 121 is a clamping surface 1211, and the positioning piece 2 has a clamping hole 21 adapted to the clamping surface 1211. The positioning piece 2 is clamped to the positioning step 121 of the nozzle sleeve 12 based on the cooperation between the clamping hole 21 and the clamping surface 1211, thereby realizing circumferential positioning of the positioning piece 2 between the nozzle sleeve 12.

[0031] To achieve the proper alignment between the positioning piece 2 and the nozzle sleeve 12, the engaging surface 1211 can be any structure that allows for proper alignment. Theoretically, any non-circular cross-section, such as a polygon, ellipse, or irregular shape, will suffice. In this embodiment, the engaging surface 1211 is formed by a combination of two opposing arcuate surfaces and two opposing flat surfaces. The two opposing flat surfaces secure the nozzle sleeve 12 in position and circumferentially align the nozzle sleeve 12 with the positioning piece 2.

[0032] In this embodiment, the nozzle sleeve 12 has a limiting step 122, which is arranged at the upper end of the positioning step 121. The outer diameter of the limiting step 122 is larger than the outer diameter of the positioning step 121, and a limiting surface 123 is formed between the limiting step 122 and the positioning step 121; in addition, a nozzle sleeve flange 13 is sleeved on the nozzle sleeve 12, and a spring washer 14 is also sleeved between the nozzle sleeve flange 13 and the positioning step 121; the limiting surface 123 and the spring washer 14 are used to axially limit the positioning plate 2.

[0033] Based on the above-disclosed anti-rotation nozzle mechanism, this embodiment also discloses a nozzle plate structure, including a nozzle plate 4 and the above-mentioned nozzle mechanism, the nozzle plate 4 has a nozzle mounting position 41, and the nozzle mechanism is installed in the nozzle mounting position 41; the nozzle mounting position 41 is a stepped hole position, including a first mounting position 411 and a second mounting position 412 connected upper and lower, the first mounting position 411 is adapted to the positioning piece 2, the second mounting position 412 is adapted to the nozzle 1, and a mounting surface 413 is formed between the first mounting position 411 and the second mounting position 412; the positioning piece 2 is installed in the first mounting position 411 and abuts the mounting surface 413, the nozzle 1 is installed in the second mounting position 412 and its lower end extends outward through the second mounting position 412.

[0034] In this embodiment, the nozzle plate 4 further has a third mounting position 42, which is connected to the first mounting position 411 and accommodates the positioning portion 22. The third mounting position 42 has a mounting hole 43 that corresponds to the positioning structure 23. The positioning portion 22 is installed in the third mounting position 42, and the positioning member 3 cooperates with the positioning structure 23 and the mounting hole 43 to fix the positioning portion 22 in the third mounting position 42. The limiting action of the positioning member 3 maintains the relative position of the positioning piece 2 and the nozzle plate 4, effectively ensuring the stability of the nozzle mechanism during the injection molding process.

[0035] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the scope of protection of the present invention.

Claims

1. An anti-rotation nozzle mechanism, comprising a nozzle, characterized in that: A positioning piece is clamped on the nozzle, and the positioning piece has a positioning portion extending away from the nozzle. The positioning portion is provided with a positioning structure, and the positioning piece is restricted from rotating by the cooperation between the positioning member and the positioning structure.

2. The anti-rotation nozzle mechanism according to claim 1, characterized in that: The nozzle includes a nozzle body and a nozzle sleeve. The upper end of the nozzle body is installed in the nozzle sleeve. The lower end of the nozzle body extends outward from the bottom of the nozzle sleeve. The positioning piece is clamped on the nozzle sleeve.

3. The anti-rotation nozzle mechanism according to claim 2, characterized in that: The nozzle sleeve has a positioning step, the outer peripheral surface of the positioning step is a snap-fit ​​surface, the positioning piece has a snap-fit ​​hole adapted to the snap-fit ​​surface, and the positioning piece is snap-fitted to the positioning step of the nozzle sleeve based on the matching of the snap-fit ​​hole and the snap-fit ​​surface.

4. The anti-rotation nozzle mechanism according to claim 3, characterized in that: The clamping surface is formed by combining two opposite arc surfaces and two opposite planes.

5. The anti-rotation nozzle mechanism according to claim 3, characterized in that: The nozzle sleeve is provided with a limiting step, the outer diameter of the limiting step is larger than the outer diameter of the positioning step, and a limiting surface for limiting the axial movement of the positioning piece is formed between the limiting step and the positioning step.

6. The anti-rotation nozzle mechanism according to claim 3 or 5, characterized in that: A nozzle sleeve flange is sleeved on the nozzle sleeve, and a spring washer for limiting the axial movement of the positioning piece is sleeved between the nozzle sleeve flange and the positioning step.

7. The anti-rotation nozzle mechanism according to claim 1, characterized in that: The positioning structure is a positioning hole or a positioning recess.

8. A nozzle plate structure, characterized in that: It comprises a nozzle plate and a nozzle mechanism according to any one of claims 1 to 7, wherein the nozzle plate has a nozzle mounting position, and the nozzle mechanism is mounted in the nozzle mounting position.

9. The nozzle plate structure according to claim 8, characterized in that: The nozzle mounting position includes a first mounting position and a second mounting position connected up and down, the first mounting position is adapted to the positioning piece, the second mounting position is adapted to the nozzle, and a mounting surface is formed between the first mounting position and the second mounting position; The positioning piece is installed in the first installation position and abuts against the installation surface. The nozzle is installed in the second installation position and the lower end thereof passes through the second installation position and extends outward.

10. The nozzle plate structure according to claim 9, characterized in that: The nozzle plate further has a third mounting position, which is connected to the first mounting position and can accommodate the positioning portion, and the third mounting position has a mounting hole that can correspond to the positioning structure; The positioning portion is installed in the third installation position, and the positioning portion is fixed in the third installation position based on the cooperation between the positioning member, the positioning structure and the installation hole.

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