Needle valve type integrated hot nozzle

Abstract

The utility model relates to the technical field of hot nozzles, and discloses a needle valve type integrated hot nozzle which comprises a valve body and a top shell, a heater is arranged outside the valve body, a top cover is arranged at the upper end of the top shell, a piston lifting shell is arranged in the top shell, an inner ring shell is rotationally arranged at the lower end of the interior of the piston lifting shell, and a needle valve is arranged in the inner ring shell. Limiting grooves which are evenly distributed in the annular direction are formed in the inner ring shell, penetrating holes are formed in one ends of the interiors of the limiting grooves, a valve needle is arranged between the inner ring shell and the valve body, a limiting end is arranged at the position, located at the upper end of the inner ring shell, of the upper end of the valve needle, and the outer diameter of the limiting end is larger than the inner diameter of the limiting grooves. The outer diameter of the limiting end is smaller than the inner diameter of the penetrating hole, and four limiting holes evenly distributed in the annular direction are formed in the side, close to the inner ring shell, of the interior of the piston lifting shell. The inner ring shell is rotated to enable the penetrating hole to move to the position of the limiting groove so that the valve needle can be disassembled and assembled conveniently.

Description

Technical Field

[0001] This utility model relates to the field of hot nozzle technology, specifically a needle valve type integrated hot nozzle. Background Technology

[0002] A needle valve integrated hot runner is a hot runner system component used in injection molds, combining the features of a needle valve hot runner and an integrated hot runner system. A needle valve hot runner controls the opening and closing of the gate through the mechanical movement of a valve needle. This design allows for more precise gate control, reduces gate marks, and improves product quality. An integrated hot runner system integrates all the components of the hot runner into a compact unit. This design reduces heat loss, improves thermal efficiency, and also facilitates installation and maintenance. Needle valve integrated hot runners are suitable for various injection molded products, especially those requiring high gate quality, such as transparent parts and precision parts.

[0003] The valve needle of a needle valve integrated hot runner is a consumable because it comes into contact with the molten plastic in the hot runner during frequent opening and closing movements and operates under high temperature and high pressure, leading to wear. Furthermore, the movement of the valve needle is affected by impurities in the molten plastic, which can damage it. Common valve needle removal methods involve first shutting down the injection molding machine and waiting for it to cool down, then using specialized tools to remove the hot runner. This usually involves loosening the fixing nut or bolt and removing the hot runner from the injection mold. After the hot runner is removed, the valve needle can be removed by loosening the valve needle fixing nut or using a specialized valve needle removal tool. Removing the valve needle from the hot runner requires multiple tools and is therefore cumbersome. To address this, a needle valve integrated hot runner is proposed. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides a needle valve type integrated hot nozzle to solve the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a needle valve type integrated hot nozzle, comprising a valve body and a top shell, wherein a heater is disposed on the outside of the valve body, a top cover is disposed on the upper end of the top shell, a piston lifting shell is disposed inside the top shell, an inner ring shell is rotatably disposed on the lower end of the piston lifting shell, a limiting groove is disposed inside the inner ring shell with uniformly distributed grooves along the ring, a through hole is disposed at one end of the limiting groove and the through hole is connected to the limiting groove, and a space is provided between the inner ring shell and the valve body. The valve needle has a limiting end located at the upper end of the inner ring shell. The outer diameter of the limiting end is larger than the inner diameter of the limiting groove, and the outer diameter of the limiting end is smaller than the inner diameter of the through hole. The piston lifting shell has four limiting holes evenly distributed along the ring on the side near the inner ring shell. The inner ring shell has four side cavities evenly distributed along the ring on the side near the limiting holes. A spring is installed inside the side cavity. A limiting ball is provided outside the spring and is adapted to the limiting hole.

[0008] Preferably, the heater is spirally mounted on the outside of the valve body and connected to the valve body. The heater is used to keep the melt inside the valve body in a molten state at all times.

[0009] Preferably, the inner ring shell has internal cavities on both sides of its lower inner end, and the internal cavities are integrally formed with the inner ring shell.

[0010] Preferably, a magnet is provided at the upper end of the inner cavity, and the magnet is connected to the inner cavity. The magnet is used to attract the iron block, thereby fixing the pull rod inside the inner cavity.

[0011] Preferably, a pull rod is slidably installed inside the inner cavity, and a conical disk is provided at the lower end of the pull rod, and the conical disk is connected to the pull rod, so that the pull rod can be easily pulled out.

[0012] Preferably, an iron block is provided at the upper end of the pull rod, and the iron block is connected to the pull rod. The iron block is used to be attracted by a magnet, thereby storing the pull rod and preventing it from falling off.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a needle valve type integrated hot nozzle, which has the following beneficial effects:

[0015] This invention utilizes the rotation of the inner ring shell to rotate the limiting groove to the position of the perforation. The inner diameter of the perforation is larger than that of the limiting end, thus eliminating the limitation on the limiting end. The valve needle is pulled out of the perforation, and then a new valve needle is inserted into the perforation and the inner ring shell is rotated in the opposite direction to reset it. This method is suitable for replacing multiple valve needles, and is convenient and quick. When replacing a single valve needle, it is only necessary to move the valve needle from the limiting groove to the perforation. In summary, this invention solves the problems mentioned in the background technology. When the inner ring shell is reset, the spring pushes the limiting ball to lock into the limiting hole, thereby limiting the inner ring shell and preventing it from being displaced by abnormal forces such as vibration, which could cause the valve needle to fall off. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0018] Figure 3 This is a perspective view of the inner ring shell structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the inner ring shell and piston lifting shell of this utility model;

[0020] Figure 5 For the present utility model Figure 4 Enlarged view of a portion of region A in the middle.

[0021] In the diagram: 1. Valve body; 2. Heater; 3. Valve needle; 4. Limiting end; 5. Piston lifting shell; 6. Inner ring shell; 7. Top shell; 8. Top cover; 9. Perforation; 10. Limiting groove; 11. Limiting hole; 12. Side cavity; 13. Spring; 14. Limiting ball; 15. Inner cavity; 16. Magnet; 17. Pull rod; 18. Conical disc; 19. Iron block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a technical solution: a needle valve type integrated hot nozzle. Please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The valve body includes a valve body 1 and a top shell 7. A heater 2 is installed on the outside of the valve body 1. A top cover 8 is installed on the upper end of the top shell 7. A piston lifting shell 5 is installed inside the top shell 7. An inner ring shell 6 is rotatably installed at the lower end of the piston lifting shell 5. A limiting groove 10 is evenly distributed along the ring inside the inner ring shell 6. A through hole 9 is provided at one end of the limiting groove 10 and is connected to the limiting groove 10. A valve needle 3 is installed between the inner ring shell 6 and the valve body 1. The upper end of the valve needle 3 is located at the upper end of the inner ring shell 6. A limiting end 4 is provided, the outer diameter of the limiting end 4 is larger than the inner diameter of the limiting groove 10, and the outer diameter of the limiting end 4 is smaller than the inner diameter of the through hole 9. The piston lifting shell 5 has four limiting holes 11 evenly distributed along the ring on the side near the inner ring shell 6. The inner ring shell 6 has four side cavities 12 evenly distributed along the ring on the side near the limiting holes 11. A spring piece 13 is installed inside the side cavity 12. A limiting ball 14 is provided outside the spring piece 13, and the limiting ball 14 is adapted to the limiting hole 11.

[0024] Please see Figure 1 and Figure 2 The heater 2 is spirally installed on the outside of the valve body 1. The heater 2 is connected to the valve body 1 and is used to keep the melt inside the valve body 1 in a molten state.

[0025] Please see Figure 5 The inner ring shell 6 has inner cavities 15 on both sides of the lower end of the inner ring shell 6, and the inner cavities 15 are integrally formed with the inner ring shell 6.

[0026] Please see Figure 5 A magnet 16 is provided at the upper end of the inner cavity 15 and is connected to the inner cavity 15. The magnet 16 is used to attract the iron block 19 so as to fix the pull rod 17 inside the inner cavity 15.

[0027] Please see Figure 5 A pull rod 17 is slidably installed inside the inner cavity 15. A conical disk 18 is provided at the lower end of the pull rod 17 and is connected to the pull rod 17. The conical disk 18 makes it easy to pull out the pull rod 17.

[0028] Please see Figure 5 An iron block 19 is provided at the upper end of the pull rod 17, and the iron block 19 is connected to the pull rod 17. The iron block 19 is used to be attracted by the magnet 16, so as to store the pull rod 17 and prevent the pull rod 17 from falling off when it is not in use.

[0029] This scheme: When gas is injected into the side of the top shell 7 located above the piston lifting shell 5, the piston lifting shell 5 is pushed downward by the gas, which in turn moves the inner ring shell 6 and the valve needle 3 downward. Conversely, when gas is injected into the side of the top shell 7 located below the piston lifting shell 5, the piston lifting shell 5 is pushed upward by the gas, which in turn moves the inner ring shell 6 and the valve needle 3 upward. When it is necessary to remove the valve needle 3, the valve body 1 is removed, the fingertip is inserted into one side of the inner cavity 15 to grip the conical disk 18 and pull it downward, so that the iron block 19 is disengaged from the magnet 16, the pull rod 17 extends, and then... Two levers 17 act as force points to rotate the inner ring shell 6. When the inner ring shell 6 rotates, the limiting ball 14 separates from the limiting hole 11. The spring piece 13 is compressed and deformed, causing the limiting ball 14 to move toward the side cavity 12. When the through hole 9 inside the inner ring shell 6 rotates to the position of the limiting groove 10, it stops rotating. At this time, the limiting end 4 of the valve needle 3 coincides with the through hole 9. The limiting end 4 can be pulled out through the through hole 9 for replacement. This method can replace all valve needles 3 at the same time. If only a single valve needle 3 needs to be replaced, the valve needle 3 can be moved from the limiting groove 10 to the through hole 9 and then pulled out.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A needle valve type integrated heating nozzle, comprising a valve body and a top shell, wherein a heater is disposed on the outside of the valve body, characterized in that: The top shell is provided with a top cover at its upper end. Inside the top shell is a piston lifting shell. Inside the piston lifting shell, an inner ring shell is rotatably provided at its lower end. Inside the inner ring shell, there are limiting grooves evenly distributed along the ring. One end of the limiting groove is provided with a through hole, which is connected to the limiting groove. A valve needle is provided between the inner ring shell and the valve body. The upper end of the valve needle is located at the upper end of the inner ring shell and is provided with a limiting end. The outer diameter of the limiting end is larger than the inner diameter of the limiting groove and smaller than the inner diameter of the through hole. Inside the piston lifting shell, there are four limiting holes evenly distributed along the ring on the side near the inner ring shell. Outside the inner ring shell, there are four side cavities evenly distributed along the ring on the side near the limiting holes. Spring pieces are installed inside the side cavities. Limiting balls are provided outside the spring pieces, and the limiting balls are adapted to the limiting holes.

2. The needle valve type integrated heating nozzle according to claim 1, characterized in that: The heater is spirally mounted on the outside of the valve body and is connected to the valve body.

3. The needle valve type integrated heating nozzle according to claim 1, characterized in that: The inner ring shell has internal cavities on both sides of its lower inner end, and the internal cavities are integrally formed with the inner ring shell.

4. A needle valve type integrated heating nozzle according to claim 3, characterized in that: A magnet is provided at the upper end of the inner cavity, and the magnet is connected to the inner cavity.

5. A needle valve type integrated heating nozzle according to claim 4, characterized in that: A pull rod is slidably installed inside the cavity, and a conical disk is provided at the lower end of the pull rod, with the conical disk connected to the pull rod.

6. A needle valve type integrated heating nozzle according to claim 5, characterized in that: An iron block is provided at the upper end of the pull rod, and the iron block is connected to the pull rod.

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