Lever type injection molding ejection material blocking device

Abstract

The utility model discloses a lever type injection molding ejection material blocking device which comprises a device main body and a charging barrel arranged in the device main body, an inner screw and an anti-reverse ring are arranged in the end, away from the device body, of the material barrel, the anti-reverse ring is located on the outer side of the inner screw, a screw head is arranged in the end, away from the device body, of the material barrel, and an injection base main plate is arranged in the device body. According to the lever type injection molding ejection material blocking device, the material blocking oil cylinder in the material blocking mechanism is arranged at the rear, the weight of the front end of the material barrel is reduced, the bending moment borne by the material barrel is remarkably reduced, meanwhile, aging of a sealing piece of the material blocking oil cylinder is reduced, the machine failure rate is reduced, and the product production efficiency is improved; the lever type limiting plug pin material blocking structure is adopted, the moment balance principle is utilized, the needed input force is remarkably reduced by increasing the length of a shifting fork force entering arm, a material blocking oil cylinder can be replaced with an air cylinder, and the energy-saving and environment-friendly effects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically a lever-type injection molding material blocking device. Background Technology

[0002] Traditional injection molding machine injection units can be divided into vertical, horizontal and all-electric types according to their working methods. The main body of the injection unit includes a hopper, barrel and screw, etc. During the operation, molten plastic particles are injected into the mold.

[0003] Furthermore, injection molding devices typically consist of an injection system, a mold clamping system, an electrical control system, a lubrication system, and a heating and cooling system. These systems work together to complete the task. At that time, existing injection molding devices still had certain defects in their use.

[0004] Currently, the material blocking mechanism on the injection unit of traditional injection molding machines is installed on the injection head at the front end of the barrel. This causes the barrel flange to be subjected to bending moment. Under frequent advance and retraction injection, the barrel flange and flange bolts often break. In addition, the temperature of the injection head at the front end of the barrel is high, which can easily cause the sealing parts of the material blocking cylinder in the material blocking mechanism to age, resulting in hydraulic oil leakage. Therefore, the machine has a high failure rate and contaminates the product.

[0005] To address the aforementioned issues, innovative design based on the existing device structure is urgently needed. Utility Model Content

[0006] The purpose of this invention is to provide a lever-type injection molding material blocking device to solve the problems mentioned in the background art, where the material blocking mechanism is installed on the injection head at the front end of the barrel, causing the barrel flange to bear bending moment. Under frequent advance and retraction injection, the barrel flange and flange bolts often break. In addition, the injection head at the front end of the barrel has a high temperature, which easily causes the sealing parts of the material blocking cylinder in the material blocking mechanism to age, resulting in hydraulic oil leakage. Therefore, the machine has a high failure rate and contaminates the product.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lever-type injection molding ejection blocking device, comprising a device body and a material cylinder disposed inside the device body;

[0008] The end of the barrel furthest from the main body of the device is provided with an inner screw and an anti-reverse ring, with the anti-reverse ring located outside the inner screw. The end of the barrel furthest from the main body of the device is provided with a screw head, which is connected to the end of the inner screw furthest from the main body of the device. The main body of the device is provided with a main injection base.

[0009] The material cylinder is provided with a material injection head on the outer side of the end away from the main body of the device, and a limit pin is provided on the outer side of the material injection head.

[0010] Preferably, a fork is rotatably mounted on the outer side of the limiting pin, and a connecting rod is rotatably mounted on the end of the fork away from the limiting pin.

[0011] Preferably, the end of the injection head away from the material cylinder is provided with an injection nozzle, and the outer side of the end of the injection nozzle away from the material cylinder is provided with a movable nozzle. A fixing nut is threaded on the outer side of the injection nozzle, and the fixing nut is located outside the movable nozzle.

[0012] Preferably, a shift fork is rotatably mounted on the outer side of the injection head, and the shift fork is rotatably connected to the limiting pin and the shift fork component respectively, and the shift fork component is located between the limiting pin and the shift fork.

[0013] Preferably, the main body of the device is provided with an injection mechanism, and a double-ear seat is provided at the end of the injection mechanism near the movable nozzle, and a material blocking cylinder is provided at the end of the double-ear seat away from the injection mechanism. At the same time, the end of the material blocking cylinder away from the double-ear seat is connected to the connecting rod.

[0014] Preferably, the device body has a material cylinder flange inside, and the device body is connected to the material cylinder, and a pressure-bearing ring is sleeved on the outside of the material cylinder flange.

[0015] Preferably, a mounting plate is fixedly installed at the lower end of the pressure ring, and a snap-fit ​​component is engaged on the outer side of the mounting plate. A limiting groove is formed inside the snap-fit ​​component, and a limiting component is engaged inside the limiting groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By placing the material blocking cylinder at the rear of the material blocking mechanism, the weight at the front end of the material cylinder is reduced, significantly reducing the bending moment borne by the material cylinder. At the same time, it reduces the aging of the seals of the material blocking cylinder, reduces the machine failure rate, and improves product production efficiency.

[0018] 2. The lever-type limit pin material blocking structure utilizes the principle of torque balance. By increasing the length of the fork's input arm, the required input force is significantly reduced, allowing the use of a pneumatic cylinder instead of a hydraulic cylinder for material blocking, thus achieving energy saving and environmental protection.

[0019] 3. Furthermore, by fixing the pressure ring on the outside of the barrel, the pressure ring can support and limit the barrel, thereby reducing the bending moment force on the barrel flange and extending the service life of the barrel flange. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This utility model Figure 1 A magnified structural diagram at point I in the diagram;

[0022] Figure 3 This is a schematic diagram of the resistive material structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the connected injection state of this utility model;

[0024] Figure 5 This is a top view of the shift fork component of this utility model;

[0025] Figure 6 This is a front view structural diagram of the snap-fit ​​component of this utility model;

[0026] Figure 7 This is a schematic diagram of the left-side structure of the pressure-bearing ring of this utility model.

[0027] In the diagram: 1. Main body of the device; 2. Barrel; 3. Inner screw; 4. Anti-reverse ring; 5. Screw head; 6. Injector head; 7. Movable nozzle; 8. Fixing nut; 9. Injector nozzle; 10. Limiting pin; 11. Fork; 12. Fork holder; 13. Connecting rod; 14. Material blocking cylinder; 15. Double ear seat; 16. Injection mechanism; 17. Injection base main board; 18. Barrel flange; 19. Pressure ring; 20. Mounting plate; 21. Snap-fit ​​component; 22. Limiting component; 23. Limiting groove. Detailed Implementation

[0028] 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.

[0029] In a specific embodiment, such as Figures 1-3 The basic operating process of the material blocking device is shown in the figure.

[0030] The device body 1 includes a material cylinder 2 installed inside the device body 1. An inner screw 3 and an anti-reverse ring 4 are installed inside the end of the material cylinder 2 away from the device body 1, and the anti-reverse ring 4 is located outside the inner screw 3. A screw head 5 is installed inside the end of the material cylinder 2 away from the device body 1, and the screw head 5 is connected to the end of the inner screw 3 away from the device body 1. A main injection plate 17 is installed inside the device body 1. An injection head 6 is installed outside the end of the material cylinder 2 away from the device body 1, and a limit pin 10 is installed outside the injection head 6.

[0031] When using this lever-type injection molding ejection device, plastic granules need to be added into the funnel and melted by the heating element. Then, the liquid plastic can be squeezed into the barrel 2 by the injection mechanism 16 and discharged through the movable nozzle 7 at one end of the barrel 2. At this time, the liquid plastic can be added into the mold. During this process, the barrel flange 18 is needed to support the injection mechanism 16 and the barrel 2 to ensure the stable operation of the device.

[0032] In one specific embodiment, such as Figures 1-5 The internal workings of the device are shown in the diagram.

[0033] A fork 11 is rotatably mounted on the outer side of the limiting pin 10, and a connecting rod 13 is rotatably mounted on the end of the fork 11 away from the limiting pin 10. An injection nozzle 9 is provided on the end of the injection head 6 away from the material cylinder 2, and a movable nozzle 7 is provided on the outer side of the end of the injection nozzle 9 away from the material cylinder 2. A fixing nut 8 is threaded on the outer side of the injection nozzle 9, and the fixing nut 8 is located on the outer side of the movable nozzle 7. A fork holder 12 is rotatably mounted on the outer side of the injection head 6, and the fork holder 12 is rotatably connected to the limiting pin 10 and the fork 11 respectively. The fork 11 is located between the limiting pin 10 and the fork holder 12. An injection mechanism 16 is provided inside the main body 1 of the device, and a double ear seat 15 is provided on the end of the injection mechanism 16 near the movable nozzle 7. A material blocking cylinder 14 is provided on the end of the double ear seat 15 away from the injection mechanism 16. At the same time, the end of the material blocking cylinder 14 away from the double ear seat 15 is connected to the connecting rod 13.

[0034] When using this lever-type injection molding material blocking device, the lever-type limit pin material blocking mechanism: the input arm of the fork 10 is 2.5 times larger than the output arm. Therefore, when the material blocking cylinder 14 inputs force F to the fork under the action of the hydraulic system, the end of the limit pin 10 can output a force of 2.5F, thereby reducing the input force. A cylinder can be used instead of the material blocking cylinder 14 to achieve energy saving and environmental protection. Furthermore, placing the material blocking cylinder 14 in the material blocking mechanism at the rear reduces the weight of the front end of the barrel 2, significantly reducing the bending moment borne by the barrel 2. At the same time, it reduces the aging of the seals of the material blocking cylinder 14, reduces the machine failure rate, and improves product production efficiency.

[0035] Based on the above embodiments, such as Figures 1-2 and Figures 6-7 As shown, the process of further reducing the bending moment on the barrel flange 18 inside the device is disclosed;

[0036] The device body 1 has a material cylinder flange 18 inside, and the device body 1 is connected to the material cylinder 2. A pressure ring 19 is sleeved on the outside of the material cylinder flange 18. A mounting plate 20 is fixedly installed at the lower end of the pressure ring 19. A snap-fit ​​component 21 is engaged on the outside of the mounting plate 20. A limit groove 23 is opened inside the snap-fit ​​component 21. At the same time, a limit component 22 is engaged inside the limit groove 23.

[0037] When using this lever-type injection molding ejection blocking device, a pressure ring 19 needs to be fitted on the outside of the barrel 2, and the pressure ring 19 needs to be tightly fitted to the outside of the barrel 2. A mounting plate 20 is fixedly installed at the lower end of the pressure ring 19, and the mounting plate 20 is located at the upper end of the injection base main board 17. A snap-fit ​​connector 21 is installed at the upper end of the mounting plate 20, which penetrates through the injection base main board 17. A limit groove 23 is opened at the lower end of the snap-fit ​​connector 21. At this time, the limit member 22 is installed inside the limit groove 23 by bolts, so that the barrel 2 is supported by the pressure ring 19, thereby reducing the bending moment on the barrel flange 18 connected to the outside of the barrel 2, thus extending the service life of the barrel flange 18 and increasing the overall practicality.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] 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 lever-type injection molding ejection blocking device, comprising a device body (1) and a material cylinder (2) disposed inside the device body (1); characterized in that The inner screw (3) and anti-reverse ring (4) are provided inside the end of the material cylinder (2) away from the main body (1), and the anti-reverse ring (4) is located outside the inner screw (3). The screw head (5) is provided inside the end of the material cylinder (2) away from the main body (1), and the screw head (5) is connected to the end of the inner screw (3) away from the main body (1). The main body (1) is provided with a main injection base (17). The material cylinder (2) is provided with a material injection head (6) on the outer side of the end away from the main body (1) of the device, and a limit pin (10) is provided on the outer side of the material injection head (6).

2. A lever-type injection blocking device according to claim 1, characterized in that: A fork (11) is rotatably mounted on the outer side of the limiting pin (10), and a connecting rod (13) is rotatably mounted on the end of the fork (11) away from the limiting pin (10).

3. A levered injection stopper according to claim 2, wherein: The injection head (6) is provided with an injection nozzle (9) at one end away from the material cylinder (2), and a movable nozzle (7) is provided on the outer side of the end of the injection nozzle (9) away from the material cylinder (2). A fixing nut (8) is threaded on the outer side of the injection nozzle (9), and the fixing nut (8) is located on the outer side of the movable nozzle (7).

4. A levered injection stopper according to claim 3, wherein: The outer side of the injection head (6) is rotatably mounted with a shift fork (12), and the shift fork (12) is rotatably connected to the limiting pin (10) and the shift fork (11) respectively, and the shift fork (11) is located between the limiting pin (10) and the shift fork (12).

5. A levered injection stopper according to claim 4, wherein: The device body (1) is provided with an injection mechanism (16) inside, and a double ear seat (15) is provided at one end of the injection mechanism (16) near the movable nozzle (7), and a material blocking cylinder (14) is provided at one end of the double ear seat (15) away from the injection mechanism (16), and the end of the material blocking cylinder (14) away from the double ear seat (15) is connected to the connecting rod (13).

6. A levered injection stopper according to claim 5, wherein: The device body (1) is provided with a material cylinder flange (18) inside, and the device body (1) is connected to the material cylinder (2), and a pressure ring (19) is sleeved on the outside of the material cylinder flange (18).

7. A levered injection stopper according to claim 6, wherein: The lower end of the pressure ring (19) is fixedly installed with a mounting plate (20), and a snap-fit ​​component (21) is engaged on the outer side of the mounting plate (20). A limiting groove (23) is opened inside the snap-fit ​​component (21), and a limiting component (22) is engaged inside the limiting groove (23).

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