A nozzle assembly for hot runner injection molding system

Abstract

The utility model discloses a nozzle assembly for a hot runner injection molding system, including a connecting piece, a mounting barrel is arranged at a position below the connecting piece, and a limiting groove is arranged at a position outside the mounting barrel. Through the combination of the limiting groove and the pin, the design of the limiting groove can provide additional support and stability, ensuring that the internal structure will not shake or sway. By simultaneously nesting the internal limiting block and the limiting plate, it can be ensured that the end of the internal structure is firmly fixed in the shell, thereby improving the stability and reliability of the internal structure. By using an internal second spring to control the pressure of the pin and the limiting groove, it can be ensured that the pin will not be separated from the limiting groove. In this way, the integrity and consistency of the internal structure can be maintained, and failures and errors caused by structural deformation or imbalance can be avoided. The rotating disassembly design of the pin provides convenience and efficiency during cleaning and maintenance, thereby reducing maintenance costs and repair time.

Description

Technical Field

[0001] The utility model belongs to the technical field related to hot runner injection molding, and in particular relates to a nozzle assembly for a hot runner injection molding system. Background Art

[0002] The injection nozzle is installed on the injection molding machine. After the original granular plastic raw material is melted, it enters the nozzle through the flow channel of the injection nozzle and is then injected into the mold cavity. After shaping and cooling, a molded product is obtained. The temperature of the molten plastic material is strictly controlled during its circulation inside the injection molding machine, especially in the process of injecting the plastic melt into the mold through the injection nozzle. If the plastic melt cools inside the injection nozzle, it is easy to cause the plastic melt to solidify in the flow channel.

[0003] However, when the existing nozzle assembly for hot runner injection molding system is in use, the nozzle is usually threadedly installed on the injection molding machine, which is very inconvenient to disassemble. In addition, the interior of the existing injection molding machine nozzle is easily blocked, so the nozzle often needs to be disassembled for cleaning, which makes the nozzle cleaning inconvenient. Utility Model Content

[0004] The purpose of the utility model is to provide a nozzle assembly for a hot runner injection molding system, so as to solve the problem that the existing nozzle assembly for a hot runner injection molding system proposed in the above background technology is that when in use, the nozzle is usually threadedly installed on the injection molding machine, which is very inconvenient to disassemble, and the interior of the existing injection molding machine nozzle is easily blocked, so the nozzle often needs to be disassembled for cleaning, which makes the nozzle cleaning not convenient enough.

[0005] To achieve the above-mentioned object, the utility model provides the following technical solutions: a nozzle assembly for a hot runner injection molding system, comprising a nozzle housing;

[0006] A connecting piece is provided at the top of the nozzle housing, a bottom opening is provided at the bottom of the nozzle housing, and a liquid outlet is provided at an inner position of the bottom opening;

[0007] A mounting tube is arranged at a position below the connecting piece, an inner tube is arranged at a position inside the mounting tube, and an embedded tube is arranged at a bottom position of the mounting tube.

[0008] Preferably, limiting grooves are respectively provided on the front and rear sides of the installation tube, a limiting plate is provided at the middle position of the inner tube, the limiting plate and the inner tube are integrally connected, and an inner cavity is provided at the middle position of the inner tube and the installation tube.

[0009] Preferably, pins are respectively provided on the left and right sides above the embedded cylinder, a telescopic ring is provided at the top of the embedded cylinder, and a second spring is provided at the bottom of the telescopic ring.

[0010] Preferably, the diameter of the pin corresponds to the limiting groove, the top diameter of the pin is larger than the diameter of the limiting groove, a limiting block is arranged at the middle position inside the embedded cylinder, the limiting block corresponds to the limiting plate, the embedded cylinder corresponds to the inner cavity of the mounting cylinder and the inner cylinder, and the embedded cylinder is nested and connected with the mounting cylinder.

[0011] Preferably, a heat insulation plate is provided at an inner position of the nozzle housing, a heat conducting member is provided at an inner position of the heat insulation plate, and a thermal resistance wire is provided in an array inside the heat conducting member.

[0012] Preferably, an embedding ring is provided at the bottom of the inner tube, and an embedding groove is provided at the bottom of the embedding tube, and the embedding groove corresponds to the embedding ring.

[0013] Preferably, a flow channel is provided at a middle position inside the heat conducting member, a drainage needle is provided at a bottom position of the flow channel, and fixing members are provided on the left and right sides of the drainage needle respectively.

[0014] Preferably, a pressure piece is provided at the top of the drainage needle, a first spring is provided at the bottom of the pressure piece, and an inner cavity corresponding to the pressure piece is opened inside the drainage needle.

[0015] Compared with the prior art, the utility model provides a nozzle assembly for a hot runner injection molding system, which has the following beneficial effects:

[0016] 1. Through the arrangement of the installation tube, the limit groove, the inner tube, the limit plate, the pin, the telescopic ring and the second spring, and through the combination of the limit groove and the pin, the inner tube bottom ring and the embedded groove can be firmly fixed to avoid the risk of movement or falling off. The design of the limit groove can provide additional support and stability to ensure that the internal structure does not shake or sway. By simultaneously nesting the inner limit block and the limit plate, it can be ensured that the end of the internal structure is firmly fixed in the shell, thereby improving the stability and reliability of the internal structure. By using the internal second spring to control the pressure of the pin and the limit groove, it can be ensured that the pin will not be separated from the limit groove. In this way, the integrity and consistency of the internal structure can be maintained, and failures and errors caused by structural deformation or imbalance can be avoided. The rotating disassembly design of the pin provides convenience and efficiency during cleaning and maintenance, thereby reducing maintenance costs and repair time.

[0017] 2. Heating uniformity is achieved by introducing heat into the hot part more evenly. This design ensures that the entire heat-conducting part is heated more evenly, improving heating efficiency and performance. The heat shield can effectively prevent heat from dissipating from the inside of the nozzle housing to the outside, so that heat can be concentrated in the area required by the nozzle, improving the efficiency of thermal energy utilization. At the same time, the heat shield can also reduce heat conduction, so that the ambient temperature around the nozzle is controlled, further protecting the normal operation of other equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the inner cylinder in the utility model.

[0020] Figure 3 It is a structural schematic diagram of the embedded cylinder in the utility model.

[0021] Figure 4 It is a structural schematic diagram of the cross section of the nozzle shell in the utility model.

[0022] Figure 5 It is a structural schematic diagram of the telescopic ring in the utility model.

[0023] In the figure: 1. Connecting piece; 2. Mounting cylinder; 3. Nozzle housing; 4. Bottom opening; 5. Drainage needle; 6. Limiting groove; 7. Pin; 8. Inner cylinder; 9. Limiting plate; 10. Embedded ring; 11. Telescopic ring; 12. Embedded groove; 13. Heat conducting piece; 14. Thermal resistance wire; 15. Flow channel; 16. Liquid outlet; 17. Fixing piece; 18. First spring; 19. Second spring; 20. Embedded cylinder; 21. Heat insulating plate; 22. Pressure piece; 23. Limiting block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides Figure 1-5 A nozzle assembly for a hot runner injection molding system shown includes a nozzle housing 3;

[0026] A connecting piece 1 is provided at the top of the nozzle housing 3, a bottom opening 4 is provided at the bottom of the nozzle housing 3, and a liquid outlet 16 is provided inside the bottom opening 4;

[0027] A mounting tube 2 is disposed below the connector 1 , an inner tube 8 is disposed inside the mounting tube 2 , and an embedded tube 20 is disposed at the bottom of the mounting tube 2 .

[0028] Limiting grooves 6 are respectively arranged on the front and rear sides of the installation tube 2, a limiting plate 9 is arranged in the middle of the inner tube 8, the limiting plate 9 is integrally connected with the inner tube 8, and an inner cavity is arranged in the middle of the inner tube 8 and the installation tube 2.

[0029] Pins 7 are respectively arranged on the left and right sides above the embedded cylinder 20 , a telescopic ring 11 is arranged at the top of the embedded cylinder 20 , and a second spring 19 is arranged at the bottom of the telescopic ring 11 .

[0030] The diameter of the pin 7 corresponds to the limiting groove 6, and the top diameter of the pin 7 is larger than the diameter of the limiting groove 6. A limiting block 23 is arranged at the middle position inside the embedded tube 20, and the limiting block 23 corresponds to the limiting plate 9. The embedded tube 20 corresponds to the inner cavity of the mounting tube 2 and the inner tube 8, and the embedded tube 20 is nested and connected with the mounting tube 2.

[0031] A heat insulating plate 21 is disposed at the inner side of the nozzle housing 3 , a heat conducting member 13 is disposed at the inner side of the heat insulating plate 21 , and a thermal resistance wire 14 is disposed in an array inside the heat conducting member 13 .

[0032] An embedding ring 10 is provided at the bottom of the inner tube 8 , and an embedding groove 12 is provided at the bottom of the embedding tube 20 , and the embedding groove 12 corresponds to the embedding ring 10 .

[0033] A flow channel 15 is arranged at the middle position inside the heat conducting member 13 , a drainage needle 5 is arranged at the bottom position of the flow channel 15 , and fixing members 17 are arranged on the left and right sides of the drainage needle 5 , respectively.

[0034] A pressure piece 22 is disposed at the top of the drainage needle 5 , a first spring 18 is disposed at the bottom of the pressure piece 22 , and an inner cavity corresponding to the pressure piece 22 is opened inside the drainage needle 5 .

[0035] In this embodiment, the specific implementation steps of the nozzle assembly for the hot runner injection molding system are as follows: the connector 1 is installed on the main body, and the limiting grooves 6 are provided on the left and right sides of the installation cylinder 2. The pin 7 is slid into the limiting groove 6 through the top opening, so that the bottom embedded ring 10 of the inner cylinder 8 is nested and fixed with the embedded groove 12, so that the inner cylinder 8 is fixed in the shell. When the flow channel 15 is blocked and needs to be cleaned, the nozzle can be removed by rotating the pin outward, and the nozzle can be quickly disassembled from the injection molding machine for cleaning, which is convenient and quick.

[0036] like Figure 1-5 As shown, limiting grooves 6 are respectively provided on the front and rear sides of the mounting tube 2, a limiting plate 9 is provided at the middle position of the inner tube 8, the limiting plate 9 and the inner tube 8 are integrally connected, an inner cavity is provided at the middle position of the inner tube 8 and the mounting tube 2, pins 7 are respectively provided on the left and right sides above the embedded tube 20, a telescopic ring 11 is provided at the top position of the embedded tube 20, and a second spring 19 is provided at the bottom position of the telescopic ring 11, the diameter of the pin 7 corresponds to the limiting groove 6, the top diameter of the pin 7 is larger than the diameter of the limiting groove 6, a limiting block 23 is provided at the middle position inside the embedded tube 20, the limiting block 23 corresponds to the limiting plate 9, the embedded tube 20 corresponds to the inner cavity of the mounting tube 2 and the inner tube 8, and the embedded tube 20 is nested and connected with the mounting tube 2.

[0037] Preferably, limit grooves 6 are provided on the left and right sides of the installation cylinder 2, and the pin 7 is slid into the limit groove 6 through the top opening, so that the bottom embedded ring 10 of the inner cylinder 8 is nested and fixed with the embedded groove 12, and at the same time, the limit block 23 in the nested 20 is engaged with the limit plate 9, so that the inner cylinder 8 is fixed in the shell, and the telescopic ring 11 at the top of the embedded cylinder 20 is connected to the connecting piece 1, and the internal second spring 19 gives downward pressure to prevent the pin 7 from being dislocated from the limit groove 6. When the flow channel 15 is blocked and needs to be cleaned, the nozzle can be removed by rotating the pin 7 outward, thereby reducing maintenance costs.

[0038] like Figure 4 As shown, a heat insulation plate 21 is provided at the inner side of the nozzle housing 3, a heat conducting member 13 is provided at the inner side of the heat insulation plate 21, a thermal resistance wire 14 is provided in an array inside the heat conducting member 13, an embedded ring 10 is provided at the bottom of the inner cylinder 8, an embedded groove 12 is provided at the bottom of the embedded cylinder 20, and the embedded groove 12 corresponds to the embedded ring 10.

[0039] Preferably, the internal array of the heat conducting member 13 is provided with a thermal resistance wire 14. When heating is performed, the thermal resistance wire 14 introduces heat into the heat member 13, so that the thermal resistance wire 14 is heated more evenly. At the same time, the embedding groove 12 at the bottom of the embedding cylinder 20 is nested and connected with the embedding ring 10, making the connection tighter. A heat insulation plate 21 is provided at the inner side of the nozzle housing 3 to prevent heat overflow, reduce energy costs, and prevent heat from affecting the normal operation of other components.

[0040] like Figure 1 and Figure 3-4 As shown, a flow channel 15 is arranged at the middle position inside the heat conducting member 13, a drainage needle 5 is arranged at the bottom position of the flow channel 15, fixing members 17 are arranged on the left and right sides of the drainage needle 5, a pressure member 22 is arranged at the top position of the drainage needle 5, a first spring 18 is arranged at the bottom position of the pressure member 22, and an inner cavity corresponding to the pressure member 22 is opened inside the drainage needle 5.

[0041] Optionally, when the injection pressure of the injection molding machine decreases at the end of injection molding, it is easy to cause plastic melt backflow at the injection nozzle, affecting the quality of the plastic finished product. Through the cooperation of the pressure piece 22 and the first spring 18, when the pressure drops, the plastic melt is prevented from flowing back and affecting the product quality.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nozzle assembly for a hot runner injection molding system, comprising a nozzle housing (3); A connecting piece (1) is provided at the top of the nozzle housing (3), a bottom opening (4) is provided at the bottom of the nozzle housing (3), and a liquid outlet (16) is provided at an inner position of the bottom opening (4); Features: A mounting tube (2) is arranged at a position below the connecting member (1), an inner tube (8) is arranged at an inner position of the mounting tube (2), and an embedding tube (20) is arranged at a bottom position of the mounting tube (2); limiting grooves (6) are arranged at the front and rear sides of the mounting tube (2), a limiting plate (9) is arranged at a middle position of the inner tube (8), the limiting plate (9) and the inner tube (8) are integrally connected, and an inner cavity is arranged at a middle position of the inner tube (8) and the mounting tube (2); pins (7) are arranged at left and right sides above the embedding tube (20), a telescopic ring (11) is arranged at the top position of the embedding tube (20), and a second spring (19) is arranged at the bottom position of the telescopic ring (11).

2. The nozzle assembly for a hot runner injection molding system according to claim 1, characterized in that: The diameter of the pin (7) corresponds to the limiting groove (6), the top diameter of the pin (7) is larger than the diameter of the limiting groove (6), a limiting block (23) is arranged at the middle position inside the embedded cylinder (20), the limiting block (23) corresponds to the limiting plate (9), the embedded cylinder (20) corresponds to the inner cavity of the mounting cylinder (2) and the inner cylinder (8), and the embedded cylinder (20) is nested and connected with the mounting cylinder (2).

3. The nozzle assembly for a hot runner injection molding system according to claim 1, characterized in that: A heat insulation board (21) is arranged at an inner position of the nozzle housing (3), a heat conducting member (13) is arranged at an inner position of the heat insulation board (21), and a heat resistance wire (14) is arranged in an array inside the heat conducting member (13).

4. The nozzle assembly for a hot runner injection molding system according to claim 3, characterized in that: An embedding ring (10) is provided at the bottom of the inner cylinder (8), and an embedding groove (12) is provided at the bottom of the embedding cylinder (20), wherein the embedding groove (12) corresponds to the embedding ring (10).

5. The nozzle assembly for a hot runner injection molding system according to claim 4, characterized in that: A flow channel (15) is provided at the middle position inside the heat conducting member (13), a drainage needle (5) is provided at the bottom position of the flow channel (15), and fixing members (17) are respectively provided on the left and right sides of the drainage needle (5).

6. The nozzle assembly for a hot runner injection molding system according to claim 5, characterized in that: A pressure piece (22) is arranged at the top of the drainage needle (5), a first spring (18) is arranged at the bottom of the pressure piece (22), and an inner cavity corresponding to the pressure piece (22) is opened inside the drainage needle (5).

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