Nozzle assembly and injection molding machine

Abstract

The utility model discloses a nozzle assembly which comprises a connecting assembly, a nozzle body and a heating assembly, the connecting assembly is connected with the input end of the nozzle body, the heating assembly is connected with the nozzle body, and the heating assembly is used for heating the nozzle body; the heating assembly is arranged on the outer side of the nozzle body and comprises a heating shell and a gas inlet pipeline, the interior of the heating shell is hollow, the gas inlet pipeline communicates with the interior of the heating shell, and the gas inlet pipeline is used for inputting external high-temperature gas. External high-temperature gas is introduced through the heating shell and the gas inlet pipeline to heat the nozzle body, and the problem that residual melt in the nozzle is attached to the inner wall after being cooled and solidified is solved. And the residual melt can be softened and even melted by heating, so that the residual melt is not firmly adhered to the inner wall of the nozzle any more, the friction force during disassembly is greatly reduced, and the nozzle is easier and more efficient to disassemble. The utility model further discloses an injection molding machine.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machine nozzles, in particular to a nozzle assembly and an injection molding machine. Background Art

[0002] In the technical field of injection molding machines, the nozzle assembly, as a crucial part of the injection molding machine, directly affects the quality and efficiency of injection molding. Due to the high temperature and high pressure characteristics of the plastic melt during the injection process, the nozzle assembly is prone to wear and corrosion. Therefore, it is necessary to remove the worn nozzle assembly and assemble a new one. In the prior art, there are often residual melt materials on the inner side wall of the nozzle. These residual melt materials cool inside the nozzle, and the residual melt materials will adhere to the connection between the inner wall of the nozzle and the discharge port of the injection molding machine, which increases the friction during disassembly and makes it difficult to remove the nozzle. Summary of the Utility Model

[0003] To solve the problems existing in the prior art, the utility model provides a nozzle assembly and an injection molding machine.

[0004] The technical solution adopted by the utility model is as follows:

[0005] In a first aspect of the present application, a nozzle assembly is provided, including: a connection assembly, a nozzle body, and a heating assembly. The connection assembly is connected to the input end of the nozzle body, the heating assembly is connected to the nozzle body, and the heating assembly is used to heat the nozzle body;

[0006] The heating assembly includes a heating housing and an air inlet pipe. The heating housing is hollow inside, and the air inlet pipe is communicated with the inside of the heating housing. The air inlet pipe is used for inputting external high-temperature gas.

[0007] Preferably, the connection assembly includes a first connecting piece and a second connecting piece. The feed inlet of the nozzle body is connected to one end of the second connecting piece, the other end of the second connecting piece is connected to one end of the first connecting piece, and the other end of the first connecting piece is used to connect to the discharge port of the injection molding machine.

[0008] Preferably, the heating housing includes a housing and a fixing piece. The housing is sleeved outside the nozzle body, and the fixing piece is connected to the housing. The fixing piece is used to fix the housing outside the nozzle body.

[0009] Preferably, a first through hole is provided at one end of the fixing piece, and a second through hole is provided at the other end of the fixing piece. The first through hole and the second through hole are connected by bolts.

[0010] Preferably, a first support piece is provided on the outside of the housing. The first support piece is used to support the air inlet pipe.

[0011] Preferably, an air outlet pipe is provided on one side of the air inlet pipe, and the air outlet pipe communicates with the inside of the housing.

[0012] Preferably, a first support member, an elastic member and a seal member are provided in the air outlet pipe. The first support member is connected to the inner wall of the air outlet pipe. A plurality of ventilation holes are provided on the first support member. One end of the elastic member is connected to the first support member, and the other end of the elastic member is connected to the seal member. The seal member is arranged at the air outlet of the air outlet pipe, and the seal member abuts against the air outlet of the air outlet pipe.

[0013] A second aspect of the present application provides an injection molding machine, including the above-mentioned nozzle assembly.

[0014] The beneficial effects of the present utility model are as follows: By arranging a heating component outside the nozzle body and introducing external high-temperature gas through the heating housing and the air inlet pipe to heat the nozzle body, the problem that the residual molten material inside the nozzle cools and solidifies and adheres to the inner wall is solved. Heating can soften or even melt these residual molten materials, so that they no longer adhere firmly to the inner wall of the nozzle, thereby greatly reducing the friction during disassembly and making the disassembly of the nozzle easier and more efficient. Description of the Drawings

[0015] Figure 1 It is a side view structural diagram of the first embodiment of the present utility model;

[0016] Figure 2 It is a side view structural diagram of the separation of the nozzle assembly and the connection assembly in the first embodiment of the present utility model;

[0017] Figure 3 It is a three-dimensional structural diagram of the second embodiment of the present utility model;

[0018] Figure 4 It is a three-dimensional structural diagram of the third embodiment of the present utility model;

[0019] Figure 5 It is a side view sectional structural diagram of the air outlet pipe in the third embodiment of the present utility model.

[0020] Reference numerals: 1. Connection assembly; 11. First connection member; 111. First external thread; 112. Second external thread; 12. Second connection member; 2. Nozzle body; 21. Connection port; 211. Third external thread; 22. Feed port; 3. Heating component; 31. Heating housing; 311. Housing; 312. Fixing member; 313. First through hole; 314. Second through hole; 315. First support member; 32. Air inlet pipe; 33. Air outlet pipe; 34. Second support member; 35. Elastic member; 36. Seal member. Detailed Description of the Embodiments

[0021] To make the objectives, solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and do not limit the present utility model.

[0022] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, it will be apparent to those of ordinary skill in the art that: the present utility model does not have to employ these specific details. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the present utility model.

[0023] Throughout the specification, references to "one embodiment", "an embodiment", "one example", or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present utility model. Thus, the phrases "one embodiment", "an embodiment", "one example", or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the specific features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art should understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0024] In the description of the present utility model, the orientation or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model.

[0025] Embodiment 1

[0026] A nozzle assembly, as Figure 1 shown, includes: a connection assembly 1, a nozzle body 2, and a heating assembly 3. The connection assembly 1 is connected to the input end of the nozzle body 2, the heating assembly 3 is connected to the nozzle body 2, and the heating assembly 3 is used to heat the nozzle body 2;

[0027] The heating assembly 3 includes a heating housing 31 and an intake pipe 32. The heating housing 31 is hollow inside, the intake pipe 32 is in communication with the interior of the heating housing 31, and the intake pipe 32 is used for inputting external high-temperature gas.

[0028] As Figure 1 shown, the connecting component 1 includes a first connecting piece 11 and a second connecting piece 12. The feed port of the nozzle body 2 is connected to one end of the second connecting piece 12, the other end of the second connecting piece 12 is connected to one end of the first connecting piece 11, and the other end of the first connecting piece 11 is used to be connected to the discharge port of the injection molding machine.

[0029] Specifically, as Figure 2 shown, the first connecting piece 11 is a threaded sleeve. The outer wall of the threaded sleeve is provided with a first external thread 111 and a second external thread 112. The first external thread 111 is used for threaded connection with the discharge port of the injection molding machine. The second connecting piece 12 is a nut. The second external thread 112 is used for connection with the nut. The nozzle body 2 includes a connection port 21 and a feed port 22. The feed port 22 and the connection port 21 are integrally designed. The outer side wall of the connection port 21 is provided with a third external thread 211. The third external thread 211 is used for connection with the nut. The feed port 22 is used to be inserted into the first connecting piece 11. The feed port 22 and the first connecting piece 11 are in clearance fit, and the length of the feed port 22 is the same as the length of the first connecting piece 11.

[0030] During assembly, insert the feed port 22 of the nozzle body 2 into the first connecting piece 11 (threaded sleeve), screw the second connecting piece 12 (nut) onto the second external thread 112 of the first connecting piece 11 (threaded sleeve), align the third external thread 211 of the connection port 21 of the nozzle body 2 and screw it into the second connecting piece 12 (nut) that has been pre-installed on the first connecting piece 11. At the same time, the feed port 22 of the nozzle body 2 is inserted into the first connecting piece 11 (threaded sleeve), and a stable connection body is formed among the first connecting piece 11, the second connecting piece 12 and the nozzle body 2. Then, thread the first external thread 111 of the first connecting piece 11 with the discharge port of the injection molding machine. This step completes the overall connection of the nozzle assembly and the injection molding machine. The disassembly process is the reverse operation. It should be noted that during disassembly, it is possible to choose to only disassemble the nozzle body 2 or disassemble both the first connecting piece 11 at the discharge port of the injection molding machine and the nozzle body 2.

[0031] In this embodiment, after the nozzle assembly is assembled with the injection molding machine, during the injection molding process, the plastic melt enters the nozzle body 2 through the discharge port of the injection molding machine and is then sprayed into the mold to complete the injection molding. At this time, the heating assembly 3 can be in a non-heating state, or appropriate temperature control can also be provided according to the requirements of the injection molding material. When the nozzle assembly needs to be replaced, first, external high-temperature gas is introduced into the heating housing 31 through the intake pipe 32. The high-temperature gas circulates in the heating housing 31 to uniformly heat the nozzle body 2. As the temperature of the nozzle body 2 gradually increases, the residual melt at the feed port 22 of the nozzle body 2 and the connection between the first connecting member 11 and the discharge port of the injection molding machine begins to soften or even melt. These softened melts may flow out naturally under the action of gravity. At this time, the first connecting member 11 can be more easily removed from the discharge port of the injection molding machine for replacement or maintenance.

[0032] Embodiment 2:

[0033] Based on Embodiment 1, in order to firmly connect the heating housing to the nozzle body 2, as Figure 3 shown, the heating housing 31 includes a housing 311 and a fixing member 312. The housing 311 is sleeved outside the nozzle body 2. As Figure 3 one side of the housing 311 is provided with an opening. The housing 311 has a certain elasticity, and the diameter of the housing 311 is slightly larger than the diameter of the nozzle body 2. The housing 311 can be sleeved outside the nozzle body 2. The fixing member 312 is connected to the housing 311, and the fixing member 312 is used to fix the housing 311 outside the nozzle body 2. Among them, the fixing member 312 can be welded to the outside of the housing 311. One end of the fixing member 312 is provided with a first through hole 313, and the other end of the fixing member 312 is provided with a second through hole 314. The first through hole 313 and the second through hole 314 are connected by a bolt (not shown in the figure). A bolt (not shown in the figure) is used to pass through the first through hole 313 and the second through hole 314 of the fixing member 312 and tighten the bolt. Thereby, the housing 311 is clamped so that the housing 311 can be more firmly sleeved on the nozzle body 2 to prevent it from falling off due to vibration during work. A first support member 315 is provided on the outside of the housing 311, and the first support member 315 is used to support the intake pipe 32. As Figure 3 shown, the first support member is bent. The first support member can be a stainless steel support plate. The side wall of the stainless steel support plate is welded to the housing 311, and the top of the stainless steel support plate abuts against the bottom of the intake pipe 32.

[0034] Embodiment 3

[0035] As Figure 4 shown, one side of the intake pipe 32 is provided with an outlet pipe 33, and the outlet pipe 33 is communicated with the inside of the housing 311.

[0036] like Figure 5 As shown, the air outlet pipe 33 is provided with a second support member 34, an elastic member 35 and a sealing member 36. The second support member 34 is connected to the inner wall of the air outlet pipe 33. The second support member 34 is provided with a plurality of vents. One end of the elastic member 35 is connected to the second support member 34, and the other end of the elastic member 35 is connected to the sealing member 36. The sealing member 36 is provided at the air outlet of the air outlet pipe 33, and the sealing member 36 abuts against the air outlet of the air outlet pipe 33. In the initial state, the elastic member 35 is in a state of stretching to a certain extent, so the elastic member 35 exerts a pulling force on the sealing member 36 toward the inside of the air outlet pipe 33, so that the sealing member 36 can abut against the air outlet of the air outlet pipe 33 more tightly.

[0037] Among them, the air inlet and outlet pipes serve as the entrance and exit of high-temperature gas, and are usually made of high-temperature resistant and corrosion-resistant metal materials, such as stainless steel. Its diameter and length are designed according to demand to ensure the balance of gas flow and heating effect. The shell 311, as the main part of the heating shell, is made of high-temperature resistant and thermally conductive materials, such as ceramics or special alloys. Its shape and size are customized according to the design of the nozzle body 2 to ensure close fit and effective heating. The second support member 34 can be a mesh or porous structure support member made of stainless steel, with evenly distributed vents on it to allow high-temperature gas to pass through. The elastic member 35 can be a high-temperature resistant spring. The seal 36 is a circular sealing gasket made of high-temperature resistant silicone, which has good elasticity and sealing performance and can maintain a stable sealing effect in a high-temperature environment.

[0038] In this embodiment, when the nozzle assembly needs to be replaced, firstly, external high-temperature gas is introduced into the heating shell 31 through the air inlet pipe 32. The high-temperature gas circulates in the heating shell 31 to uniformly heat the nozzle body 2. As the temperature of the nozzle body 2 gradually increases, the residual melt at the connection between the feed port 22 of the nozzle body 2 and the first connecting member 11 and the outlet of the injection molding machine begins to soften or even melt. Under normal circumstances, the seal 36 is tightly in contact with the outlet of the outlet pipe 33 to prevent the high-temperature gas from staying in the heating shell 31 for too short a time and directly dissipating. As the high-temperature gas continues to enter the heating shell 31, the air pressure in the heating shell 31 and the outlet pipe 33 will increase. When the air pressure increases to a certain level, the seal 36 will open under the lifting effect of the high-temperature gas, allowing the high-temperature gas to be discharged to maintain the air pressure balance between the shell and the outside.

[0039] Embodiment 4

[0040] An injection molding machine comprises the above-mentioned nozzle assembly.

[0041] The above-described embodiments merely represent the specific implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. A nozzle assembly, characterized in that: include: A connecting component (1), a nozzle body (2) and a heating component (3), wherein the connecting component (1) is connected to an input end of the nozzle body (2), the heating component (3) is connected to the nozzle body (2), and the heating component (3) is used to heat the nozzle body (2); The heating assembly (3) comprises a heating shell (31) and an air intake pipe (32); the heating shell (31) is hollow, the air intake pipe (32) is connected to the interior of the heating shell (31), and the air intake pipe (32) is used for inputting external high-temperature gas.

2. A nozzle assembly according to claim 1, characterized in that: The connecting assembly (1) comprises a first connecting member (11) and a second connecting member (12); the feed port of the nozzle body (2) is connected to one end of the second connecting member (12); the other end of the second connecting member (12) is connected to one end of the first connecting member (11); and the other end of the first connecting member (11) is used to be connected to the discharge port of an injection molding machine.

3. A nozzle assembly according to claim 1, characterized in that: The heating shell (31) comprises a shell (311) and a fixing member (312); the shell (311) is sleeved on the outside of the nozzle body (2); the fixing member (312) is connected to the shell (311); and the fixing member (312) is used to fix the shell (311) on the outside of the nozzle body (2).

4. A nozzle assembly according to claim 3, characterized in that: One end of the fixing member (312) is provided with a first through hole (313), and the other end of the fixing member (312) is provided with a second through hole (314), and the first through hole (313) and the second through hole (314) are connected by bolts.

5. A nozzle assembly according to claim 3, characterized in that: A first support member (315) is provided on the outer side of the housing (311), and the first support member (315) is used to support the air intake pipe (32).

6. A nozzle assembly according to claim 3, characterized in that: An air outlet pipe (33) is provided on one side of the air inlet pipe (32), and the air outlet pipe (33) is in communication with the interior of the housing (311).

7. A nozzle assembly according to claim 6, characterized in that: A second support member (34), an elastic member (35) and a sealing member (36) are arranged in the air outlet pipe (33); the second support member (34) is connected to the inner wall of the air outlet pipe (33); a plurality of vent holes are arranged on the second support member (34); one end of the elastic member (35) is connected to the second support member (34); the other end of the elastic member (35) is connected to the sealing member (36); the sealing member (36) is arranged at the air outlet of the air outlet pipe (33); and the sealing member (36) abuts against the air outlet of the air outlet pipe (33).

8. An injection molding machine, characterized in that: Comprising the nozzle assembly according to any one of claims 1-7.

Images