High-precision hot runner positioning system

Abstract

The utility model discloses a high-precision hot runner positioning system, which comprises a hot runner valve needle, a positioning guide nozzle head and a hot runner nozzle head main body, a mounting slot is arranged at the bottom of the hot runner nozzle head main body, and the positioning guide nozzle head is arranged in the mounting slot. A central through hole is formed in the hot runner nozzle head main body, the central through hole is communicated with the mounting slot, a hot runner valve needle is mounted in the central through hole, and the hot runner valve needle penetrates through the positioning and guiding nozzle head and extends to the outside of the positioning and guiding nozzle head. The hot runner nozzle head is provided with the positioning guide nozzle head and the positioning balls, when the hot runner nozzle head is used, a hot runner valve needle is inserted into the positioning guide nozzle head, the hot runner valve needle can be positioned to the central positions of the positioning guide nozzle head and the hot runner nozzle head main body through the four groups of positioning balls, the positioning precision can be effectively improved, and the injection effect of a hot runner is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner positioning equipment, and specifically relates to a high-precision hot runner positioning system. Background Technique

[0002] A hot runner is a heating component system used in an injection mold to inject molten plastic particles into the cavity of the mold. A positioning system is often provided inside the hot runner to support and position the valve pin, so that the needle valve moves smoothly and the hot runner injection is stable.

[0003] For example, in the utility model: "Needle Valve Front Section Positioning Device for Needle Valve Hot Runner", the publication number is: "CN213648509U". This patent has a convex portion for three-point positioning of the valve pin on the inner side of the central positioning bracket to support the valve pin, making the up and down movement of the valve pin more stable and smooth. The valve pin moves stably, the product has no burrs, and the surface quality is improved to achieve the best injection molding effect. However, during the implementation of this patent, the valve pin generates sliding friction with the convex portion during movement, which easily causes wear of the convex portion on the inner side of the central positioning bracket. This not only easily loses the supporting effect on the valve pin but also easily causes damage to the valve pin and the central positioning bracket, greatly reducing the positioning accuracy and service life of the hot runner positioning system. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-precision hot runner positioning system to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-precision hot runner positioning system includes a hot runner valve pin, a positioning guide nozzle head, and a hot runner nozzle head body. An installation slot is provided at the bottom of the hot runner nozzle head body, and the positioning guide nozzle head is installed inside the installation slot. A central through hole is provided inside the hot runner nozzle head body. The central through hole is communicated with the installation slot, and the hot runner valve pin is installed inside the central through hole. The hot runner valve pin passes through the positioning guide nozzle head and extends to the outside of the positioning guide nozzle head. Fixed jacks are provided at both ends of the positioning guide nozzle head.

[0006] Preferably, a nozzle port is provided at the top of the hot runner nozzle head body, and the nozzle port is communicated with the central through hole.

[0007] Preferably, a plurality of ball grooves are uniformly provided inside the positioning guide nozzle head, and positioning balls are installed inside the ball grooves.

[0008] Preferably, there are four groups of ball grooves, and the included angle between adjacent two groups of ball grooves is ninety degrees.

[0009] Preferably, mounting round holes are provided at the bottoms of both ends of the hot runner nozzle head body, and fixing insertion rods are installed inside the mounting round holes.

[0010] Preferably, connecting pull plates are installed at the ends of the fixing insertion rods away from the hot runner nozzle head body, and fixing springs are installed at the bottoms of the connecting pull plates close to the hot runner nozzle head body. The ends of the fixing springs away from the connecting pull plates are connected to the hot runner nozzle head body.

[0011] Preferably, wear-resistant layers are provided on the outer sides of the positioning balls.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The high-precision hot runner positioning system is equipped with a positioning guide nozzle head and positioning balls. During use, insert the hot runner valve needle into the positioning guide nozzle head. Through the four groups of positioning balls, the hot runner valve needle can be positioned at the central position of the positioning guide nozzle head and the hot runner nozzle head body, effectively improving the positioning accuracy and ensuring the injection effect of the hot runner.

[0014] 2. During the use of the high-precision hot runner positioning system, when the hot runner valve needle moves inside the positioning guide nozzle head, the positioning balls can rotate under force, and there is rolling friction between the positioning balls and the hot runner valve needle. Compared with the sliding friction mode between the convex part and the valve needle, the friction force of the device is smaller, and the wear of the hot runner valve needle and the positioning guide nozzle head is also smaller. This not only helps to extend the service life of the device but also can assist the movement of the hot runner valve needle through the positioning balls, making the movement of the hot runner valve needle smoother.

[0015] 3. The high-precision hot runner positioning system is equipped with a connecting pull plate, a fixing spring, and a fixing insertion rod. Insert the fixing insertion rod into the fixing jack, and the positioning guide nozzle head can be installed on the hot runner nozzle head body. After use, the fixing insertion rod can be taken out of the fixing jack, and the positioning guide nozzle head can be quickly removed from the hot runner nozzle head body, facilitating the maintenance and replacement of the positioning guide nozzle head. Description of the Drawings

[0016] Figure 1 is the main sectional view schematic diagram of the present utility model;

[0017] Figure 2 is the sectional view schematic diagram of the top view of the positioning guide nozzle head of the present utility model;

[0018] Figure 3 is the present utility model Figure 1 The enlarged view of the structure at A in.

[0019] In the figure: 1. Hot runner valve needle; 2. Positioning and guiding nozzle head; 3. Hot runner nozzle head body; 4. Installation slot; 5. Connecting pull plate; 6. Central through hole; 7. Nozzle port; 8. Fixed spring; 9. Positioning ball; 10. Ball groove; 11. Fixed jack; 12. Installation round hole; 13. Fixed insertion rod. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-3 , an embodiment provided by the present invention: a high-precision hot runner positioning system, including a hot runner valve needle 1, a positioning and guiding nozzle head 2 and a hot runner nozzle head body 3. An installation slot 4 is provided at the bottom of the hot runner nozzle head body 3, and a positioning and guiding nozzle head 2 is installed inside the installation slot 4. A central through hole 6 is provided inside the hot runner nozzle head body 3. The central through hole 6 communicates with the installation slot 4, and a hot runner valve needle 1 is installed inside the central through hole 6. The hot runner valve needle 1 passes through the positioning and guiding nozzle head 2 and extends to the outside of the positioning and guiding nozzle head 2. Fixed jacks 11 are provided at both ends of the positioning and guiding nozzle head 2. A nozzle port 7 is provided at the top of the hot runner nozzle head body 3, and the nozzle port 7 communicates with the central through hole 6.

[0022] As Figures 1-2 shown, ball grooves 10 are evenly provided inside the positioning and guiding nozzle head 2, and positioning balls 9 are installed inside the ball grooves 10. There are four groups of ball grooves 10, and the included angle between adjacent two groups of ball grooves 10 is 90 degrees. When the hot runner valve needle 1 moves inside the positioning and guiding nozzle head 2, the positioning balls 9 can rotate under force. There is rolling friction between the positioning balls 9 and the hot runner valve needle 1. Compared with the sliding friction mode between the convex part and the valve needle, the friction force of the device is smaller, and the wear of the hot runner valve needle 1 and the positioning and guiding nozzle head 2 is also smaller. This is not only beneficial to extending the service life of the device, but also can assist the movement of the hot runner valve needle 1 through the positioning balls 9, making the movement of the hot runner valve needle 1 smoother. Wear-resistant layers are provided on the outer sides of the positioning balls 9, which is beneficial to extending the service life of the positioning balls 9.

[0023] As Figures 1-3As shown in the figure, mounting round holes 12 are provided at the bottoms of both ends of the hot runner nozzle head body 3, and fixing insertion rods 13 are installed inside the mounting round holes 12. Connecting pull plates 5 are installed at the ends of the fixing insertion rods 13 away from the hot runner nozzle head body 3. Fixing springs 8 are installed at the bottoms of the ends of the connecting pull plates 5 close to the hot runner nozzle head body 3. The ends of the fixing springs 8 away from the connecting pull plates 5 are connected to the hot runner nozzle head body 3. Insert the fixing insertion rods 13 into the fixing jacks 11, and the positioning and guiding nozzle head 2 can be installed on the hot runner nozzle head body 3. After use, the fixing insertion rods 13 can be taken out from the fixing jacks 11, and the positioning and guiding nozzle head 2 can be quickly removed from the hot runner nozzle head body 3, facilitating the maintenance and replacement of the positioning and guiding nozzle head 2.

[0024] Working principle:

[0025] During use, first insert the positioning and guiding nozzle head 2 into the installation slot 4 so that the positioning and guiding nozzle head 2 is in close contact with the hot runner nozzle head body 3;

[0026] When the fixing jack 11 on the positioning and guiding nozzle head 2 moves to a position directly opposite the fixing insertion rod 13, the elastic action of the fixing spring 8 causes it to pull the connecting pull plate 5 to move. The connecting pull plate 5 drives the fixing insertion rod 13 to move together, and the fixing insertion rod 13 can be inserted into the fixing jack 11. By limiting the positioning and guiding nozzle head 2 with the fixing insertion rod 13, the positioning and guiding nozzle head 2 can be prevented from continuing to move, and the positioning and guiding nozzle head 2 and the hot runner nozzle head body 3 can be firmly installed;

[0027] Then the staff can pass the hot runner valve pin 1 through the central through hole 6 and the nozzle port 7, and pass the hot runner valve pin 1 through the positioning and guiding nozzle head 2, so that the four groups of positioning balls 9 inside the positioning and guiding nozzle head 2 are in contact with the hot runner valve pin 1. Through the four groups of positioning balls 9, the hot runner valve pin 1 can be positioned at the central positions of the positioning and guiding nozzle head 2 and the hot runner nozzle head body 3, effectively improving the positioning accuracy and ensuring the injection effect of the hot runner;

[0028] During the use process, when the hot runner valve pin 1 moves inside the positioning and guiding nozzle head 2, the positioning balls 9 can rotate under force, and there is rolling friction between the positioning balls 9 and the hot runner valve pin 1. The friction of the device is smaller, and the wear of the hot runner valve pin 1 and the positioning and guiding nozzle head 2 is also smaller. This not only helps to extend the service life of the device, but also can assist the movement of the hot runner valve pin 1 through the positioning balls 9, making the movement of the hot runner valve pin 1 smoother.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A high-precision hot runner positioning system, comprising a hot runner valve pin (1), a positioning and guiding nozzle head (2), and a hot runner nozzle head body (3), characterized in that: The bottom of the hot runner nozzle head body (3) is provided with an installation slot (4), and a positioning and guiding nozzle head (2) is installed inside the installation slot (4). A central through hole (6) is arranged inside the hot runner nozzle head body (3). The central through hole (6) is communicated with the installation slot (4), and a hot runner valve pin (1) is installed inside the central through hole (6). The hot runner valve pin (1) passes through the positioning and guiding nozzle head (2) and extends to the outside of the positioning and guiding nozzle head (2). Both ends of the positioning and guiding nozzle head (2) are provided with fixed insertion holes (11).

2. The high-precision hot runner positioning system according to claim 1, wherein: The top of the hot runner nozzle head body (3) is provided with a nozzle port (7), and the nozzle port (7) is communicated with the central through hole (6).

3. A high-precision hot runner positioning system according to claim 1, characterized in that: The inside of the positioning and guiding nozzle head (2) is evenly provided with ball grooves (10), and positioning balls (9) are installed inside the ball grooves (10).

4. The high-precision hot runner positioning system according to claim 3, wherein: There are four groups of the ball grooves (10), and the included angle between two adjacent groups of ball grooves (10) is ninety degrees.

5. The high-precision hot runner positioning system according to claim 1, characterized in that: Installation round holes (12) are arranged at the bottoms of both ends of the hot runner nozzle head body (3), and fixed insertion rods (13) are installed inside the installation round holes (12).

6. The high-precision hot runner positioning system according to claim 5, characterized in that: One ends of the fixed insertion rods (13) far away from the hot runner nozzle head body (3) are all installed with connecting pull plates (5), and fixed springs (8) are installed at the bottoms of the ends of the connecting pull plates (5) close to the hot runner nozzle head body (3). One ends of the fixed springs (8) far away from the connecting pull plates (5) are all connected with the hot runner nozzle head body (3).

7. A high-precision hot runner positioning system according to claim 3, characterized in that: Wear-resistant layers are arranged on the outer sides of the positioning balls (9).

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