Pressure regulating device in injection molding process

Abstract

The utility model belongs to the technical field of injection molding machines, and discloses a pressure regulating device in an injection molding process, which comprises an injection molding pipe, a spray head is arranged at one end of the injection molding pipe, the spray head and the injection molding pipe are jointly provided with a clamping mechanism, the clamping mechanism comprises a sleeve, and the inner surface of the sleeve is in sliding connection with the injection molding pipe. A plurality of spherical grooves are formed in the inner surface of the injection molding pipe, balls are arranged on the inner surfaces of the spherical grooves, and pressing rings used in cooperation with the balls are fixedly connected to the inner surface of the sleeve. Connection can be completed by clamping the ball into the annular groove of the new nozzle transmission pipe I, so that an operator can complete nozzle replacement in a short time and adjust injection molding pressure in time, the production flexibility and efficiency are improved, and diversified production requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding machine technology, specifically a pressure regulating device in the injection molding process. Background Technology

[0002] Different types of plastics exhibit different fluid properties in their molten state. For example, polyethylene and polypropylene have different melt flow rates, resulting in different injection rates and pressures after entering the injection mold cavity at the same rated hydraulic pressure. To ensure that different plastics can be molded under appropriate pressure, a pressure regulating device is needed to accommodate these differences.

[0003] Meanwhile, the patent specification with announcement number CN219988388U discloses a mold pressure adjustment device for injection molding machines, which includes a mold closing unit, comprising a mold closing device, a control switch box fixed to the front end of the mold closing device, limit rods fixed to the mold closing device, and telescopic rods respectively provided on the mold closing device; a movable template unit, disposed on the telescopic rods, comprising a movable plate, each movable plate having limit holes, the limit rods passing through the limit holes, a mold first fixed on the movable plate, and insert rods fixed to the mold first; and a fixed template unit, disposed on the limit rods, comprising a fixed plate, the limit rods being fixed to a fixed plate, a mold second fixed on the fixed plate, the mold second having mold grooves, and pressure detection modules respectively provided on the fixed plate.

[0004] In actual use, the existing injection molding pressure regulating device has a complex connection structure between the nozzle and the injection tube and lacks a quick disassembly and assembly design. This makes the operation process cumbersome and time-consuming when it is necessary to change different models of nozzles to adjust the injection pressure, which seriously affects the production efficiency. Secondly, the sealing design of the existing device is not precise enough and the adaptability of the sealing components is poor, which can easily lead to leakage of plastic melt, thereby affecting product quality and causing material waste.

[0005] Therefore, a pressure regulating device for the injection molding process is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a pressure regulating device for injection molding processes. This device allows operators to quickly change nozzles and adjust injection pressure, improving production flexibility and efficiency, adapting to diverse production needs, ensuring the stability of the injection molding process, improving product quality, and reducing material waste.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pressure regulating device in an injection molding process, comprising an injection tube, one end of which is provided with a nozzle, the nozzle and the injection tube sharing a locking mechanism, the locking mechanism comprising a sleeve, the inner surface of which is slidably connected to the injection tube, the inner surface of which is provided with a plurality of spherical grooves, each of which is provided with a ball bearing, the inner surface of which is fixedly connected with a pressure ring for use with the ball bearing, the inner surface of which is fixedly connected with a transmission tube, the outer surface of which is provided with an annular groove for use with the plurality of ball bearings.

[0008] Preferably, the outer surface of the injection-molded tube is provided with a receiving groove, and a return spring is wound around the outer surface of the receiving groove. One end of the return spring is fixedly connected to the inner wall of one side of the receiving groove, and the other end of the return spring is fixedly connected to a pressure ring. The pressure ring is slidably connected to the receiving groove.

[0009] Preferably, the outer surface of the injection-molded tube has two grooves, and the inner surface of the sleeve is fixedly connected with a slider that cooperates with the two grooves.

[0010] Preferably, the diameter of the spherical groove is larger than the diameter of the ball, and the opening size of the spherical groove is smaller than the diameter of the ball, so as to prevent the ball from falling out of the spherical groove.

[0011] Preferably, a fixing ring is fixedly connected to the inner surface of the injection molding tube, a sealing spring is fixedly connected to one end of the fixing ring, a transmission tube two is fixedly connected to one end of the sealing spring, and the outer surface of the transmission tube two is slidably connected to the inner surface of the injection molding tube.

[0012] Preferably, two guide strips are fixedly connected to the outer surface of the second transmission tube, and a guide groove is formed on the inner surface of the injection-molded tube to cooperate with the two guide strips.

[0013] Preferably, the inner diameter of the first transmission pipe and the second transmission pipe are the same, and a sealing gasket is fixedly connected to one end of each of the first and second transmission pipes. Both sealing gaskets are made of high-temperature resistant and corrosion-resistant rubber material.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting a snap-fit ​​mechanism, allows for easy replacement of the nozzle during production when the injection pressure requirements of different products need to be adjusted. By operating the sleeve, the ball bearing is snapped into the annular groove of the new nozzle's transmission pipe, thus completing the connection. Operators can complete the nozzle replacement in a short time and adjust the injection pressure in a timely manner, improving the flexibility and efficiency of production and adapting to diverse production needs.

[0016] 2. By setting up a first transfer tube and a second transfer tube, the sealing spring always applies an elastic force to the second transfer tube, causing the second transfer tube to fit tightly against the first transfer tube through the sealing gasket. This ensures the stability of the injection molding process, improves product quality, and reduces material waste. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the injection-molded tube structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the injection-molded pipe of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the sleeve of this utility model;

[0021] Figure 5 This is a schematic diagram of the transmission pipe and nozzle structure of this utility model.

[0022] In the diagram: 1. Injection-molded pipe;

[0023] 2. Nozzle; 21. Transfer pipe one; 22. Annular groove; 23. Sealing gasket;

[0024] 3. Snap-fit ​​mechanism; 31. Slide groove; 311. Slider; 32. Receiving groove; 33. Ball bearing; 34. Guide bar; 35. Spherical groove; 36. Transmission pipe II; 37. Guide groove; 38. Fixing ring; 39. Sealing spring; 40. Sleeve; 41. Pressure ring; 42. Return spring. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 5 As shown, this utility model provides a pressure regulating device in the injection molding process, including an injection tube 1, one end of which is provided with a nozzle 2, and the nozzle 2 and the injection tube 1 are provided with a snap-fit ​​mechanism 3.

[0027] The snap-fit ​​mechanism 3 includes a sleeve 40, the inner surface of which is slidably connected to the injection molding tube 1. The inner surface of the injection molding tube 1 has several spherical grooves 35, and each spherical groove 35 has a ball bearing 33 on its inner surface. The inner surface of the sleeve 40 is fixedly connected to a pressure ring 41 that works with the ball bearing 33. The inner surface of the nozzle 2 is fixedly connected to a transmission tube 21, and the outer surface of the transmission tube 21 has an annular groove 22 that works with the ball bearing 33. By setting up the injection molding tube 1, the nozzle 2, and the snap-fit ​​mechanism 3, and utilizing the cooperation between the sleeve 40, the ball bearing 33, the pressure ring 41, and the annular groove 22, the quick and stable snap-fit ​​between the nozzle 2 and the injection molding tube 1 is achieved, which facilitates installation and disassembly and improves work efficiency.

[0028] Specifically, the outer surface of the injection-molded tube 1 is provided with a receiving groove 32, and a return spring 42 is wound around the outer surface of the receiving groove 32. One end of the return spring 42 is fixedly connected to the inner wall of one side of the receiving groove 32, and the other end of the return spring 42 is fixedly connected to the pressure ring 41. The pressure ring 41 is slidably connected to the receiving groove 32. The connection design of the receiving groove 32 on the outer surface of the injection-molded tube 1, the return spring 42, and the pressure ring 41 enables the return spring 42 to provide a certain elastic force during the snap-fit ​​process, ensuring that the pressure ring 41 is always tightly engaged with the ball 33, thereby enhancing the stability of the snap-fit.

[0029] like Figures 1 to 5 As shown, two grooves 31 are provided on the outer surface of the injection tube 1, and a slider 311 that matches the two grooves 31 is fixedly connected to the inner surface of the sleeve 40. This provides a guiding function for the sliding of the sleeve 40 on the injection tube 1, making the sliding of the sleeve 40 smoother and further ensuring the convenience of snap-fit ​​and disassembly operations.

[0030] Furthermore, the diameter of the spherical groove 35 is larger than the diameter of the ball 33, and the opening size of the spherical groove 35 is smaller than the diameter of the ball 33, in order to prevent the ball 33 from coming out of the spherical groove 35. This ensures that the ball 33 can rotate flexibly in the spherical groove 35, and effectively prevents the ball 33 from coming out, thus ensuring the normal operation of the locking mechanism 3.

[0031] like Figures 1 to 5 As shown, a fixing ring 38 is fixedly connected to the inner surface of the injection tube 1. A sealing spring 39 is fixedly connected to one end of the fixing ring 38. A transmission tube 36 is fixedly connected to one end of the sealing spring 39. The outer surface of the transmission tube 36 is slidably connected to the inner surface of the injection tube 1. It can elastically expand and contract according to the change of injection pressure, thereby playing the role of adjusting the injection pressure and ensuring the stability of the injection process and product quality.

[0032] It is worth noting that two guide strips 34 are fixedly connected to the outer surface of the second transmission tube 36, and a guide groove 37 is provided on the inner surface of the injection tube 1 to cooperate with the two guide strips 34. This provides precise guidance for the sliding of the second transmission tube 36 in the injection tube 1, ensuring the positional accuracy of the second transmission tube 36 during the pressure adjustment process, thereby ensuring the stability of the pressure adjustment.

[0033] like Figures 1 to 5 As shown, the inner diameter of transmission pipe 21 and transmission pipe 36 are the same, and a sealing gasket 23 is fixedly connected to one end of each of the two transmission pipes 21 and 36. Both sealing gaskets 23 are made of high temperature and corrosion resistant rubber material. The sealing gaskets 23 are made of high temperature and corrosion resistant rubber material to ensure the sealing of the injection molding material during the transmission process, prevent the injection molding material from leaking, and extend the service life of the device.

[0034] Working principle and process: When nozzle 2 needs to be installed, the sleeve 40 is slid along the groove 31 on the outer surface of the injection tube 1. At this time, the pressure ring 41 moves with the sleeve 40, compressing the return spring 42. The ball 33 rolls in the spherical groove 35. When the first transmission tube 21 of nozzle 2 is aligned with the injection tube 1, the sleeve 40 is released, the return spring 42 rebounds, and the pressure ring 41 pushes the ball 33 into the annular groove 22 of the first transmission tube 21 to complete the snap-fit. During the injection process, under the elastic force of the sealing spring 39, the first transmission tube 21 and the second transmission tube 36 can be sealed together through the sealing gasket 23 to ensure the smooth transmission of injection molding material.

[0035] 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.

[0036] 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 pressure regulating device for injection molding process, comprising an injection tube (1), characterized in that: One end of the injection tube (1) is provided with a nozzle (2), and the nozzle (2) and the injection tube (1) are provided with a snap-fit ​​mechanism (3); The snap-fit ​​mechanism (3) includes a sleeve (40), the inner surface of which is slidably connected to the injection tube (1). The inner surface of the injection tube (1) is provided with a plurality of spherical grooves (35), and the inner surface of each spherical groove (35) is provided with a ball (33). The inner surface of the sleeve (40) is fixedly connected with a pressure ring (41) for use with the ball (33). The inner surface of the nozzle (2) is fixedly connected with a first transmission tube (21), and the outer surface of the first transmission tube (21) is provided with an annular groove (22) for use with a plurality of balls (33).

2. The pressure regulating device in the injection molding process according to claim 1, characterized in that: The outer surface of the injection tube (1) is provided with a receiving groove (32), and a return spring (42) is wound around the outer surface of the receiving groove (32). One end of the return spring (42) is fixedly connected to the inner wall of one side of the receiving groove (32), and the other end of the return spring (42) is fixedly connected to the pressure ring (41). The pressure ring (41) is slidably connected to the receiving groove (32).

3. The pressure regulating device in the injection molding process according to claim 1, characterized in that: The outer surface of the injection tube (1) has two grooves (31), and the inner surface of the sleeve (40) is fixedly connected with a slider (311) that works with the two grooves (31).

4. The pressure regulating device in the injection molding process according to claim 1, characterized in that: The diameter of the spherical groove (35) is larger than the diameter of the ball (33), and the opening size of the spherical groove (35) is smaller than the diameter of the ball (33) to prevent the ball (33) from coming out of the spherical groove (35).

5. The pressure regulating device in the injection molding process according to claim 1, characterized in that: A fixing ring (38) is fixedly connected to the inner surface of the injection tube (1). A sealing spring (39) is fixedly connected to one end of the fixing ring (38). A transmission tube (36) is fixedly connected to one end of the sealing spring (39). The outer surface of the transmission tube (36) is slidably connected to the inner surface of the injection tube (1).

6. The pressure regulating device in the injection molding process according to claim 5, characterized in that: Two guide strips (34) are fixedly connected to the outer surface of the second transmission tube (36), and a guide groove (37) is provided on the inner surface of the injection tube (1) to cooperate with the two guide strips (34).

7. The pressure regulating device in the injection molding process according to claim 5, characterized in that: The inner diameter of the first transmission pipe (21) and the second transmission pipe (36) are the same, and a sealing gasket (23) is fixedly connected to one end of the first transmission pipe (21) and the second transmission pipe (36). Both sealing gaskets (23) are made of high temperature resistant and corrosion resistant rubber material.

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