Spray head structure of injection molding machine

Abstract

The utility model discloses a nozzle structure of an injection molding machine, belongs to the technical field of injection molding machines, and mainly solves the technical problems that molten plastic is remained in a nozzle after injection of the nozzle of the injection molding machine in the prior art, and the residual molten plastic leaks in the standing process of the nozzle and is difficult to be prevented from dripping from the nozzle, so that the service life of the nozzle is prolonged. The spray head structure comprises a spray head body, one end of the spray head body is in threaded connection with an assembling sleeve, the end, away from the spray head body, of the assembling sleeve is sleeved with a connecting pipe, and two mounting semi-rings are coaxially arranged on the outer surface of the connecting pipe; wherein a storage shell is arranged on the outer wall of one mounting semi-ring through a connecting seat, a material conveying pipe is embedded in one end of the storage shell, a material passing channel is formed in the spray head body in a penetrating mode, a discharging opening is formed in the spray head body, a discharging connector is embedded in the outer surface of the spray head body, and a suction assembly is arranged in the storage shell.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, and more specifically, to an injection molding machine nozzle structure. Background Technique

[0002] Injection molding is a method for manufacturing industrial product shapes. Products usually use rubber injection molding and plastic injection molding. Specifically, it refers to injecting the heat-melted material into the mold cavity under high pressure. After cooling and solidifying, a formed product is obtained. Most of the plastic products we commonly use are produced through injection molding. The key equipment for injection molding production is an injection molding machine. The injection molding machine can heat plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. Among them, the nozzle of the injection molding machine is an important component of the injection molding machine.

[0003] However, in the prior art, there are various types of injection molding machine nozzles. For example, the utility model patent CN215943542U relates to an injection molding machine nozzle for plastic processing that is convenient for maintenance. The utility model is provided with an injection main pipe. The right end of the injection main pipe is fixedly installed with a first hexagonal wrench position. The right end of the first hexagonal wrench position is fixedly installed with an external connection threaded pipe. The injection main pipe, the first hexagonal wrench position, and the external connection threaded pipe are all of an integrated structure. A temperature sensor is fixedly installed on the right part of the outer surface of the injection main pipe. An electric heating coil is fixedly sleeved on the left part of the outer surface of the injection main pipe, and the electric heating coil is electrically connected to the temperature sensor. A second hexagonal wrench position is arranged at the left end of the injection main pipe. A conical head is fixedly installed at the left end of the second hexagonal wrench position. The injection molding machine nozzle described in the utility model reduces the probability of the filter holes being blocked by setting a special structure of the filter element, improves the extraction efficiency of the filter element by setting a first internal thread hole, and realizes the automatic heating of the injection main pipe by setting a temperature sensor to link the electric heating coil.

[0004] Although this injection molding machine nozzle is convenient for disassembly and installation and can be heated automatically, after injecting the molten plastic, there will be residual molten plastic in the nozzle. During the static process of the nozzle, the residual molten plastic leaks, and it is difficult to avoid dripping from the nozzle, which not only wastes the molten plastic but also pollutes the injection molding machine. To avoid this phenomenon, it is very necessary to design an injection molding machine nozzle structure. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To achieve the above object, the utility model provides an injection molding machine nozzle structure, which is achieved by the following specific technical means:

[0007] An injection molding machine nozzle structure includes a nozzle body. One end of the nozzle body is threadedly connected with an assembly sleeve. A connecting pipe is sleeved at one end of the assembly sleeve away from the nozzle body. Two mounting half-rings are coaxially arranged on the outer surface of the connecting pipe. A storage shell is arranged on the outer wall of one of the mounting half-rings through a connecting seat. A feeding pipe is embedded at one end of the storage shell. A material passing channel is arranged through the nozzle body. A discharge port is opened in the nozzle body. A discharge joint is embedded on the outer surface of the nozzle body. A suction assembly is arranged inside the storage shell.

[0008] Preferably, the suction assembly includes a piston body, a piston connecting rod and a micro electric push rod. The piston body is slidably installed in the storage shell. One end of the piston body is fixedly connected with the piston connecting rod, and the piston connecting rod penetrates through the storage shell and can extend outside the storage shell. A frame is fixedly installed at one end of the storage shell away from the nozzle body. A micro electric push rod is fixedly installed on one side surface of the frame, and the output end of the micro electric push rod is fixedly connected with one end of the piston connecting rod.

[0009] Preferably, two positioning plates are fixedly connected to the outer walls of the two mounting half-rings. A plurality of connecting bolts are arranged through the positioning plates, and the connecting bolts are used for fixedly installing the positioning plates that are butted together.

[0010] Preferably, a regulating valve is arranged on the surface of the feeding pipe, and a control valve is arranged on the surface of the discharge joint. The control valve is used for blocking the molten plastic discharged from the discharge port.

[0011] Preferably, the material passing channel is communicated with the discharge port. One end of the discharge joint extends into the discharge port, and one end of the feeding pipe is connected with one end of the discharge joint.

[0012] Preferably, a mounting clamp seat is arranged inside the nozzle body. A filter screen is fixedly connected to one side of the mounting clamp seat, and the filter screen is in a cylindrical shape. The filter screen is located inside the assembly sleeve. A clamping groove is opened at one end of the assembly sleeve, and the clamping groove is matched with the mounting clamp seat.

[0013] Preferably, a sealing gasket is arranged in the nozzle body. One end of the assembly sleeve can be screwed into the nozzle body to press the end part against the sealing gasket. The mounting clamp seat is clamped into the clamping groove. External threads are arranged at both ends of the assembly sleeve, and internal threads are arranged at the ends of the nozzle body and the connecting pipe that are close to each other.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] After injecting molten plastic, the static nozzle will cause some molten plastic to remain in the material passage of the nozzle. At this time, a driving force is provided to the piston connecting rod through a micro electric push rod, so that the piston connecting rod drives the piston body to move, ensuring that the storage housing is in a negative pressure state. The remaining molten plastic is introduced into the pipe through the connected discharge port by using a feed pipe, and the molten plastic is sucked into the storage housing for storage. Thus, the plastic remaining in the material passage is removed, preventing leakage, avoiding waste caused by the dripping of molten plastic from the nozzle, and ensuring the cleanliness of the injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic top sectional view of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the suction assembly;

[0020] Figure 4 is a schematic diagram of the structure inside the nozzle body;

[0021] Figure 5 is a schematic diagram of the structure of the filter screen;

[0022] Figure 6 is a schematic diagram of the structure of the assembly sleeve and the connecting pipe.

[0023] In the figures: 1, nozzle body; 2, assembly sleeve; 3, connecting pipe; 4, installation half-ring; 5, connecting seat; 6, storage housing; 7, feed pipe; 8, discharge joint; 9, discharge port; 10, material passage; 11, piston body; 12, piston connecting rod; 13, micro electric push rod; 14, control valve; 15, regulating valve; 16, positioning plate; 17, connecting bolt; 18, installation card seat; 19, filter screen; 20, card slot; 21, sealing gasket; 22, external thread; 23, internal thread. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings of the specification.

[0025] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. The present utility model provides the following embodiments.

[0027] As Figure 2 , Figure 3 and Figure 4 shown, it is a schematic structural diagram of the nozzle structure of an injection molding machine in this embodiment. The nozzle structure in this embodiment includes a nozzle body 1. One end of the nozzle body 1 is threadedly connected with an assembly sleeve 2. A connecting pipe 3 is sleeved at one end of the assembly sleeve 2 away from the nozzle body 1. Two mounting half-rings 4 are coaxially arranged on the outer surface of the connecting pipe 3. A storage housing 6 is arranged on the outer wall of one of the mounting half-rings 4 through a connecting seat 5. A feeding pipe 7 is embedded at one end of the storage housing 6. A material passing channel 10 is arranged through the nozzle body 1. A discharge port 9 is opened in the nozzle body 1. A discharge joint 8 is embedded on the outer surface of the nozzle body 1. A piston body 11 is slidably installed in the storage housing 6. One end of the piston body 11 is fixedly connected with a piston connecting rod 12, and the piston connecting rod 12 passes through the storage housing 6 and can extend outside the storage housing 6. A frame is fixed at one end of the storage housing 6 away from the nozzle body 1. A micro electric push rod 13 is fixedly installed on one side surface of the frame, and the output end of the micro electric push rod 13 is fixedly connected with one end of the piston connecting rod 12. A control valve 14 is arranged on the surface of the discharge joint 8. During the use of the injection molding machine, first close the control valve 14, and inject plastic into the injection mold through the nozzle body 1. After the molten plastic is injected, part of the molten plastic will remain in the material passing channel 10 of the nozzle body 1. At this time, start the micro electric push rod 13, provide a driving force to the piston connecting rod 12 through the micro electric push rod 13, so that the piston connecting rod 12 drives the piston body 11 to move, ensuring that the storage housing 6 is in a negative pressure state. Use the feeding pipe 7 to introduce the remaining molten plastic from the connected discharge port 9 into the pipe, and suck the molten plastic into the storage housing 6 for storage, thereby removing the remaining molten plastic in the material passing channel 10, preventing its leakage, avoiding waste caused by the molten plastic dripping from the nozzle, and ensuring the cleanliness of the injection molding machine.

[0028] It should be noted that in this embodiment, the piston body 11, the piston connecting rod 12 and the micro electric push rod 13 form a suction assembly. The suction assembly is used to suck the residual molten plastic in the material passing channel 10 and store the molten plastic in the storage housing 6.

[0029] As Figure 1 shown, in order to regularly remove the molten plastic filled in the storage housing 6, in this embodiment, two positioning plates 16 are fixedly connected to the outer walls of the two mounting half rings 4. A plurality of connecting bolts 17 are arranged through the positioning plates 16. The connecting bolts 17 are used for fixedly installing the positioning plates 16 that are butted together. When cleaning the storage housing 6, first remove the end of the feed pipe 7 from the discharge joint 8, then loosen the plurality of connecting bolts 17 to release the fixing effect on the positioning plates 16, separate the two mounting half rings 4 from each other, and then the storage housing 6 can be removed, so as to facilitate the cleaning of the molten plastic filled in the storage housing 6.

[0030] In addition, as Figure 5 shown, in this embodiment, an installation card seat 18 is arranged in the nozzle body 1. A filter screen 19 is fixedly connected to one side of the installation card seat 18, and the filter screen 19 is in a cylindrical shape. The filter screen 19 is located in the assembly sleeve 2. A clamping groove 20 is opened at one end of the assembly sleeve 2, and the clamping groove 20 is matched with the installation card seat 18. Since the molten plastic contains impurities and small particles, which will be injected into the injection mold together with the plastic, these impurities and small particles will affect the quality of the product. Therefore, through the arranged filter screen 19, the impurities can be filtered and intercepted.

[0031] As Figure 6 shown, in this embodiment, a sealing gasket 21 is arranged in the nozzle body 1. One end of the assembly sleeve 2 can be screwed into the nozzle body 1 so that its end presses against the sealing gasket 21. The installation card seat 18 is clamped into the clamping groove 20. External threads 22 are arranged at both ends of the assembly sleeve 2, and internal threads 23 are arranged at the ends of the nozzle body 1 and the connecting pipe 3 that are close to each other.

[0032] As Figure 4 shown, in this embodiment, a regulating valve 15 is arranged on the surface of the feed pipe 7. The control valve 14 is used to block the molten plastic discharged from the discharge port 9. The material passing channel 10 is communicated with the discharge port 9. One end of the discharge joint 8 extends into the discharge port 9, and one end of the feed pipe 7 is connected to one end of the discharge joint 8.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nozzle structure for an injection molding machine, comprising a nozzle body (1), one end of the nozzle body (1) being threadedly connected to an assembly sleeve (2), and an end of the assembly sleeve (2) away from the nozzle body (1) being sleeved with a connecting pipe (3), characterized in that: Two mounting half rings (4) are coaxially arranged on the outer surface of the connecting pipe (3), and a storage shell (6) is arranged on the outer wall of one of the mounting half rings (4) through a connecting seat (5), and a material conveying pipe (7) is embedded in one end of the storage shell (6), a material passing channel (10) is arranged through the nozzle body (1), a material discharge port (9) is opened in the nozzle body (1), a material discharge joint (8) is embedded in the outer surface of the nozzle body (1), and a suction component is arranged inside the storage shell (6).

2. The nozzle structure of an injection molding machine according to claim 1, characterized in that: The suction assembly comprises a piston body (11), a piston connecting rod (12) and a micro electric push rod (13); the piston body (11) is slidably mounted in a storage shell (6); one end of the piston body (11) is fixedly connected to the piston connecting rod (12); the piston connecting rod (12) penetrates the storage shell (6) and can extend outside the storage shell (6); a frame is fixedly mounted on one end of the storage shell (6) away from the nozzle body (1); a micro electric push rod (13) is fixedly mounted on one side surface of the frame; and an output end of the micro electric push rod (13) is fixed to one end of the piston connecting rod (12).

3. The nozzle structure of an injection molding machine according to claim 1, characterized in that: The outer walls of the two mounting half rings (4) are fixedly connected to two positioning plates (16), and the positioning plates (16) are penetrated by a plurality of connecting bolts (17), which are used to fix and install the positioning plates (16) that are fitted and docked together.

4. The nozzle structure of an injection molding machine according to claim 1, characterized in that: A regulating valve (15) is arranged on the surface of the material conveying pipe (7), and a control valve (14) is arranged on the surface of the material discharge joint (8). The control valve (14) is used to block the molten plastic discharged from the material discharge port (9).

5. The nozzle structure of an injection molding machine according to claim 1, characterized in that: The material passing channel (10) is communicated with the discharge port (9), one end of the discharge joint (8) extends into the discharge port (9), and one end of the material conveying pipe (7) is connected to one end of the discharge joint (8).

6. The nozzle structure of an injection molding machine according to claim 1, characterized in that: A mounting base (18) is arranged in the nozzle body (1), a filter screen (19) is fixedly connected to one side of the mounting base (18), and the filter screen (19) is cylindrical. The filter screen (19) is located in the assembly sleeve (2), and a slot (20) is provided at one end of the assembly sleeve (2), and the slot (20) matches the mounting base (18).

7. The nozzle structure of an injection molding machine according to claim 1, characterized in that: A sealing gasket (21) is arranged in the nozzle body (1), one end of the assembly sleeve (2) can be screwed into the nozzle body (1) so that its end is pressed against the sealing gasket (21), and the mounting base (18) is inserted into the slot (20). Both ends of the assembly sleeve (2) are provided with external threads (22), and the ends of the nozzle body (1) and the connecting pipe (3) close to each other are provided with internal threads (23).

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