Quick connecting mechanism for machine barrel and screw rod of injection molding machine

Abstract

The invention relates to the technical field of injection molding machines, in particular to a quick connecting mechanism for a machine barrel and a screw rod of an injection molding machine. The mechanism comprises a machine barrel, a screw rod, an injection seat, a spring bolt pressing assembly and a semi-ring jacking assembly. The forward spring bolt pressing assembly and the downward spring bolt pressing assembly are arranged on the injection seat, so that the axial and radial two-way pressing and fixing of the machine barrel are realized; and meanwhile, a semi-ring jacking structure is arranged at the tail part of the screw rod, so that the screw rod and the transmission shaft can be quickly connected and detached. A lock tongue in the lock tongue pressing assembly is matched with a wedge block, locking and loosening actions are achieved through a bidirectional thread structure, the movement stroke of the lock tongue pressing assembly is two times of the displacement of a screw rod, and the loading and unloading efficiency of the machine barrel is remarkably improved. The semi-ring jacking assembly is matched with the whole circle of internal and external threads between the transmission shaft through the semi-ring connecting sleeve, so that the rear drawing force is uniformly transmitted along the circumference, and the problems that a screw in a traditional semi-ring structure is uneven in stress and easy to break are solved.

Description

Technical Field

[0001] This application belongs to the field of injection molding machine technology, specifically relating to a quick connection mechanism between the barrel and screw of an injection molding machine. Background Technology

[0002] In injection molding equipment, the plasticizing unit, consisting of the barrel and screw, is a key functional component for heating, melting, mixing, and injecting plastic raw materials. The installation and connection accuracy of the screw and barrel directly affects the operational stability, plasticizing quality, and equipment lifespan of the injection molding machine. Traditional injection molding machines often use splines or flat keys to connect the screw tail to the drive shaft, and two semi-ring pressure plates are used to fix it to the drive shaft with screws to ensure torque transmission and subsequent pulling action. However, in the frequent pulling process during machine operation, this structure subjects the screw to enormous axial tensile forces, making it highly susceptible to fatigue fracture. This leads to frequent machine downtime and maintenance, severely impacting production continuity. Furthermore, due to the limited distribution of screw stress points and uneven stress on both sides of the semi-ring, the coaxiality between the drive shaft and the screw is difficult to maintain over a long period, resulting in significant screw wear. Furthermore, traditional barrel installation methods often employ a single-set wedge block upper pressure plate structure. When the barrel is large and heavy, the clamping force of the upper wedge block on the front end of the barrel is insufficient, easily causing the front end of the barrel to sag. This leads to misalignment of the barrel and screw centerlines, resulting in uneven plasticizing friction, reduced sealing performance, and shortened service life. To disassemble or replace the barrel and screw, operators typically need to remove the locking screws one by one in a confined space. This is difficult, time-consuming, and due to inconsistent tightening torque, uneven pre-tightening, coaxiality errors, and the risk of loosening often occur after reassembly, further reducing the reliability of the equipment. Summary of the Invention

[0003] One objective of this application is to provide a quick-connect mechanism between the injection molding machine barrel and the screw, fundamentally improving the problem of screw breakage due to concentrated tension in traditional semi-ring screw connections. By introducing a semi-ring connecting sleeve structure with a full-circle internal and external thread connection, the pull force between the drive shaft and the screw is evenly distributed, thereby significantly improving the structural stability and service life. Simultaneously, in the barrel installation section, this application uses an innovative locking tongue clamping mechanism to achieve multi-directional clamping and fixing of the barrel. This effectively prevents the barrel front end from sagging during the installation of large barrels, ensuring the coaxiality of the screw and barrel, and eliminating performance degradation caused by uneven wear.

[0004] To achieve the above objectives, the first aspect of this application provides a quick connection mechanism between the barrel and screw of an injection molding machine, including a barrel, a first screw, an injection seat, a locking tongue clamping assembly, and a semi-ring lifting assembly; A locking tongue clamping assembly includes a first locking tongue clamping member, a second locking tongue clamping member, a third locking tongue clamping member, and a fourth locking tongue clamping member. Each of the first, second, third, and fourth locking tongue clamping members includes a locking tongue, a locking tongue guide sleeve, a pressure cap, a second screw, a locking nut, and a guide key. The locking tongue clamping assembly is used to fix the barrel onto the injection seat. The semi-ring lifting assembly includes a semi-ring pressure plate, a semi-ring connecting sleeve, a bushing, a second screw, an inner screw rod, and an anti-loosening structure; the semi-ring lifting assembly is used to realize the connection and quick assembly / disassembly between the inner screw rod and the drive shaft.

[0005] Furthermore, the first screw is disposed inside the barrel, and the barrel is disposed inside the injection seat.

[0006] Furthermore, a barrel pressure plate is also provided on one side of the barrel, and the barrel pressure plate is disposed between the barrel and the injection seat.

[0007] Furthermore, a first positioning key and a second positioning key are symmetrically arranged on both sides of the barrel, with the first positioning key positioned between the barrel and the barrel pressure plate.

[0008] Furthermore, the first and second locking tongue clamping components are respectively embedded in the injection seat and are horizontally symmetrically arranged on both sides of the barrel; the third and fourth locking tongue clamping components are respectively embedded in the injection seat and are vertically symmetrically arranged on both sides of the barrel.

[0009] Furthermore, each guide sleeve has a cavity at its center; the locking tongue is located within the cavity and can slide axially along the cavity.

[0010] Furthermore, the guide key is disposed within the cavity and between the latch guide sleeve and the latch, thereby restricting the rotation of the latch so that the latch can only move axially.

[0011] Furthermore, the pressure cap is disposed at the other end of the latch guide sleeve, and the pressure cap is fixedly connected to the latch guide sleeve by a first screw.

[0012] Furthermore, a threaded hole is provided at the center of the pressure cap, and a threaded mounting hole is provided at the center of the locking tongue. The second screw passes through the pressure cap and is threadedly connected to the pressure cap and the locking tongue through the threaded hole and the threaded mounting hole, respectively.

[0013] Furthermore, the locking nut is sleeved on the second screw to achieve axial limiting of the second screw.

[0014] Furthermore, the end of the locking tongue is provided with a wedge-shaped surface, and wedge blocks that cooperate with the wedge-shaped surfaces of the first locking tongue pressing member and the second locking tongue pressing member are respectively provided on both sides of the barrel, thereby providing a horizontal pressing force to the barrel; wedge blocks that cooperate with the wedge-shaped surfaces of the third locking tongue pressing member and the fourth locking tongue pressing member are respectively provided on both sides of the barrel pressure plate, thereby providing a vertical pressing force to the barrel.

[0015] Furthermore, the semi-ring connecting sleeve is fitted onto the semi-ring pressure plate, the semi-ring pressure plate is fitted onto the inner screw, and the front end of the transmission shaft is located between the semi-ring connecting sleeve and the semi-ring pressure plate.

[0016] Furthermore, the inner wall of the semi-ring connecting sleeve is provided with an internal thread, and the front end of the drive shaft is provided with an external thread. The front end of the drive shaft and the semi-ring connecting sleeve are connected by the internal and external threads to achieve a threaded connection.

[0017] Furthermore, the front end of the drive shaft, the semi-ring connecting sleeve, and the two sides of the semi-ring pressure plate are symmetrically provided with connecting holes. The inner wall of the connecting hole is provided with an internal thread. The internal thread passes through the connecting hole of the semi-ring connecting sleeve and the front end of the drive shaft, thereby fixing the semi-ring connecting sleeve to the front end of the drive shaft.

[0018] Furthermore, a receiving cavity is provided at the center of the internal screw, one end of the second screw is threadedly connected to the semi-circular pressure plate, and the other end is threadedly connected to the receiving cavity.

[0019] Furthermore, the semi-ring connecting sleeve has symmetrically arranged mounting cavities on both sides, the bushing is disposed in the mounting cavity, and the internal thread passes through the bushing and is threadedly connected to the semi-ring pressure plate.

[0020] The embodiments of this application have the following technical effects: (1) This application solves the problems of simple structure, uneven force, and complicated disassembly and assembly that are common in traditional injection molding machines in terms of barrel installation and screw connection by systematically optimizing the structure of the injection molding machine barrel and screw connection mechanism, which is especially prominent in large equipment. Attached Figure Description

[0021] The accompanying drawings, as part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application, but do not constitute an undue limitation of this application. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1This is an overall structural diagram of a quick connection mechanism between the barrel and screw of an injection molding machine according to this application; Figure 2 for Figure 1 Sectional view at point A in the middle; Figure 3 for Figure 1 Sectional view at point B; Figure 4 for Figure 1 Sectional view at point C; Figure 5 This is a partially enlarged view of the locking tongue clamping assembly in a quick connection mechanism between the barrel and screw of an injection molding machine according to this application.

[0022] in: 1. Barrel; 2. First screw; 3. Injection seat; 4. Locking tongue guide sleeve; 5. Locking tongue; 6. Second screw; 7. Locking nut; 8. Pressure cap; 9. Wedge; 10. Screw; 11. Drive shaft; 12. Semi-ring connecting sleeve; 13. Inner screw; 14. Second screw; 15. Bushing; 16. First screw; 17. Guide key; 18. Semi-ring pressure plate; 19. Barrel pressure plate; 20. First positioning key; 21. Second positioning key. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0024] In the description of this application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of this application, and not all of the embodiments of this application. These partial embodiments are intended to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Based on the embodiments provided in this application, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of this application.

[0027] For a long time, injection molding machines have generally adopted the traditional semi-ring screw connection method and the one-way wedge block pressing the barrel in their structural design. Although these solutions can meet the basic assembly requirements, they have exposed problems such as uneven force, easy breakage of screws, drooping of the front end of the barrel, low assembly efficiency, and difficulty in maintaining coaxiality in the long term during actual production.

[0028] Especially in large injection molding equipment, due to the large size and weight of the barrel, the clamping force of a single set of wedges is insufficient to resist the bending of the barrel front end due to gravity. This often causes the barrel front end to sag, which in turn causes the screw and the center line of the barrel to deviate, resulting in a series of chain problems such as uneven wear, reduced sealing performance, uneven melt flow, and equipment vibration.

[0029] Meanwhile, the traditional connection between the screw and the drive shaft relies on two half-rings and several fixing screws to bear the glue extraction force. Under high-frequency operation, local stress concentration and fatigue fracture are very likely to occur, which not only reduces the structural reliability, but also greatly increases the frequency and cost of equipment downtime maintenance.

[0030] Therefore, existing technologies have significant limitations in ensuring connection strength, improving assembly and disassembly efficiency, and maintaining structural accuracy, and a solution is urgently needed to fundamentally improve these aspects.

[0031] To address the aforementioned shortcomings, the technical solution provided in this application improves the structure of the two core components—barrel installation and screw connection—forming a comprehensive connection system consisting of a locking tongue clamping assembly and a semi-ring lifting assembly. Its core technical concept lies in combining multi-directional force clamping with full-circle thread force transmission to achieve high precision, uniform force distribution, and rapid assembly and disassembly of the barrel and screw connection, thereby systematically solving the inherent defects of traditional structures in terms of force transmission, installation convenience, and reliability.

[0032] In the barrel mounting section, this invention utilizes symmetrically arranged locking tongue clamping components on both sides of the injection seat to ensure stable clamping force in both the axial and radial directions, guaranteeing accurate positioning and a firm fit. The locking tongue and wedge employ a conical contact design, converting axial pressure into radial clamping force, thereby enhancing the fixation between the barrel and the injection seat. To prevent force shifting due to locking tongue rotation, this application further incorporates a guide key structure between the locking tongue and the guide sleeve, ensuring the locking tongue can only slide axially, guaranteeing a single direction of clamping force and a clear transmission path.

[0033] Compared with the traditional single wedge block structure, this design makes the barrel more evenly stressed, completely eliminating the phenomenon of front end sagging caused by the heavy weight of the barrel, fundamentally ensuring the coaxiality stability of the barrel and screw, and avoiding problems such as uneven wear and uneven plasticization.

[0034] In the screw connection section, this application combines the semi-ring pressure plate and the semi-ring connecting sleeve's full-circle thread structure to form a semi-ring connection mechanism that can be quickly lifted. An external thread is provided at the front end of the drive shaft, and a corresponding internal thread is provided on the inner wall of the semi-ring connecting sleeve; the two achieve full contact locking through the full-circle internal and external threads.

[0035] Unlike traditional semi-ring structures that rely on a few screws for localized stress, the internal and external threaded connection of this invention allows the axial tensile force during glue extraction to be uniformly transmitted through the entire threaded surface, significantly improving the fatigue resistance and stress stability of the structure and completely avoiding the risk of screw breakage in traditional structures.

[0036] The semi-ring pressure plate and the semi-ring connecting sleeve are connected by a bushing and screws, forming a rotatable support relationship. Automatic lifting and tightening are achieved under threaded drive, making the connection and disassembly between the screw and the drive shaft simpler and more efficient. This structure not only optimizes the force transmission path but also greatly simplifies the assembly process. Operators only need to rotate the semi-ring connecting sleeve to lift and separate the semi-ring pressure plate via threaded drive, eliminating the need to disassemble each screw individually and significantly reducing assembly time.

[0037] In contrast, traditional structures require the tightening of multiple screws during each assembly and disassembly, which is not only complex to operate but also limited by space, resulting in inconsistent assembly torque, uneven force, and difficulty in ensuring coaxiality. The full-circle thread structure of this invention effectively avoids these problems and achieves a balance between mechanical equilibrium and rapid assembly and disassembly.

[0038] Specifically, please refer to Figure 1-5 This embodiment discloses a quick connection mechanism between the barrel and screw of an injection molding machine.

[0039] Specifically, this mechanism is mainly used to achieve quick assembly and disassembly between the injection molding machine barrel 1 and the first screw 2, so that screw replacement, barrel maintenance and sealing structure adjustment can be realized under different processing conditions. It has the technical effects of compact structure, simple operation, accurate positioning and reliable assembly.

[0040] Specifically, the entire mechanism mainly includes a barrel 1, a first screw 2, an injection seat 3, a locking tongue guide sleeve 4, a locking tongue 5, a second screw 6, a locking nut 7, a pressure cap 8, a wedge block 9, a screw 10, a drive shaft 11, a semi-ring connecting sleeve 12, an inner screw 13, a second screw 14, a bushing 15, a first screw 16, a guide key 17, a semi-ring pressure plate 18, a barrel pressure plate 19, a first positioning key 20, and a second positioning key 21.

[0041] Specifically, the barrel 1, as the core component of the entire injection molding unit, is used to house and support the first screw 2. The rear end of the barrel 1 is fixedly connected to the injection seat 3, and its front end extends to the injection molding machine mold mounting area.

[0042] Specifically, the first screw 2 is installed inside the barrel 1 and arranged along the axial direction of the barrel 1 for injecting and conveying the plasticized melt.

[0043] Specifically, in order to ensure a high-strength connection between the barrel 1 and the injection seat 3 and to enable quick assembly and disassembly, a locking tongue clamping assembly is provided at the joint between the barrel 1 and the injection seat 3.

[0044] Specifically, the locking tongue clamping assembly consists of four sets of locking tongue guide sleeves 4, locking tongue 5, pressure cap 8, second screw 6, locking nut 7 and guide key 17. The four sets of locking tongue clamping assemblies are symmetrically distributed in pairs on both sides of the outer periphery of the barrel 1 in the horizontal and vertical directions.

[0045] Specifically, the locking tongue guide sleeve 4 is fixedly installed on the injection seat 3. Each locking tongue guide sleeve 4 has a hollow sliding cavity inside, and the locking tongue 5 can move axially back and forth in the sliding cavity.

[0046] Specifically, the inner wall of the latch guide sleeve 4 is provided with a guide groove, and a guide key 17 is embedded in the guide groove. The guide key 17 is located between the latch guide sleeve 4 and the latch 5, thereby restricting the rotational freedom of the latch 5 and making the latch 5 slide only in the axial direction.

[0047] Specifically, the front end of the locking tongue 5 is provided with a wedge-shaped surface, which cooperates with the wedge blocks 9 provided on both sides of the barrel 1, which are respectively provided with wedge-shaped surfaces that cooperate with the first locking tongue pressing component and the second locking tongue pressing component. This allows the locking tongue 5 to provide a horizontal pressing force to the barrel when it moves in the horizontal direction, as its wedge-shaped surface cooperates with the wedge blocks 9.

[0048] Specifically, the wedge-shaped surface at the front end of the locking tongue 5 cooperates with the wedge blocks 9 located on both sides of the barrel pressure plate, which cooperate with the wedge-shaped surfaces of the third and fourth locking tongue clamping components, thereby providing a vertical clamping force to the barrel.

[0049] Specifically, the wedge 9 is fixed to the barrel and the barrel pressure plate by screws 10. The screw depth of the screws 10 can adjust the position of the wedge 9, thereby fine-tuning the preload between the locking tongue 5 and the barrel 1, ensuring the positioning accuracy and vibration resistance of the barrel 1 during the injection process.

[0050] Specifically, the tail of the locking tongue 5 is provided with a threaded mounting hole, the center of the pressure cover 8 is provided with a threaded hole, the second screw 6 passes through the pressure cover 8 in sequence and is threadedly connected to the threaded mounting hole, and the locking nut 7 is sleeved on the second screw 6 for axial limiting and anti-loosening.

[0051] Specifically, the other end of the pressure cap 8 is fixedly connected to the latch guide sleeve 4 by the first screw 16, thereby realizing the closed structure of the entire latch clamping assembly.

[0052] Specifically, by rotating the second screw 6, the locking tongue 5 can be driven to move back and forth along the axial direction, thereby locking and releasing the barrel 1.

[0053] Specifically, in order to prevent the second screw 6 from loosening under working vibration, the locking nut 7 is double-pressed at its outer end to ensure the working stability of the locking tongue 5.

[0054] Specifically, during installation, the barrel 1 is provided with a first positioning key 20 and a second positioning key 21 on its two sides respectively. The two are symmetrical to each other and are used to accurately position the barrel 1 and the injection seat 3.

[0055] Specifically, the first positioning key 20 is installed between the barrel 1 and the barrel pressure plate 19. The barrel pressure plate 19 is located on the mating surface between the barrel 1 and the injection seat 3, and serves to bear axial force and prevent rotation.

[0056] Specifically, when the barrel 1 is pressed against the injection seat 3 by the locking tongue 5 and the wedge block 9, it is ensured that the barrel 1 will not undergo axial displacement or rotation during high-pressure injection.

[0057] Specifically, a semi-ring lifting assembly is provided at the connection between the rear end of the barrel 1 and the tail end of the first screw 2. This assembly mainly includes a semi-ring pressure plate 18, a semi-ring connecting sleeve 12, an inner screw 13, a second screw 14, a bushing 15, and a drive shaft 11.

[0058] Specifically, the semi-ring pressure plate 18 has an arc-shaped structure, and its two sides are connected to the semi-ring connecting sleeve 12 through symmetrically arranged connecting holes.

[0059] Specifically, the inner wall of the semi-ring connecting sleeve 12 is provided with internal threads, and the front end of the drive shaft 11 is provided with external threads. The two achieve a reliable mechanical connection through thread engagement.

[0060] Specifically, in order to improve the efficiency of disassembly and assembly, the semi-ring pressure plate 18 is fixed to the semi-ring connecting sleeve 12 by the inner screw 13 passing through the connecting hole. At the same time, the inner screw 13 also passes through the connecting hole at the front end of the drive shaft 11 to achieve a stable connection between the semi-ring connecting sleeve 12 and the drive shaft 11.

[0061] Specifically, mounting cavities are provided on both sides of the semi-ring connecting sleeve 12, and the bushing 15 is embedded in the mounting cavity to reduce friction and wear between the inner screw 13 and the semi-ring connecting sleeve 12 and improve the service life of the structure.

[0062] Specifically, the inner screw 13 has a receiving cavity at its center. One end of the second screw 14 is threaded to the semi-circular pressure plate 18, and the other end is threaded to the receiving cavity of the inner screw 13, thereby forming an anti-loosening fastening structure.

[0063] Specifically, by adjusting the preload of the second screw 14, the axial clearance of the inner screw 13 can be effectively controlled, preventing the connection from loosening due to long-term vibration.

[0064] Specifically, the drive shaft 11 is connected to the tail of the first screw 2 by a key or spline connection to ensure the stability of torque transmission.

[0065] Specifically, in actual operation, the drive shaft 11 drives the first screw 2 to rotate through the drive device, thereby realizing the plasticizing, metering, and injection functions of the plastic melt. When it is necessary to replace the screw or the barrel, simply loosen the connecting screws of the semi-ring pressure plate 18 and the semi-ring connecting sleeve 12 in sequence, and then loosen the second screw 6 in the locking tongue clamping assembly. The locking tongue 5 will then retract along the direction of the guide key 17, causing the wedge surface to disengage from the wedge block 9. The barrel 1 can then be quickly separated from the injection seat 3, achieving rapid maintenance without the need for complete disassembly.

[0066] Specifically, in order to further improve assembly stability, this embodiment sets four sets of locking tongue clamping components on the injection seat 3, which are located in the four directions of the barrel 1, so that the barrel 1 is evenly compressed when subjected to force.

[0067] Specifically, each locking tongue guide sleeve 4 has an identical structure, forming an independent adjustment unit through the pressure cap 8, the first screw 16, and the locking nut 7. By finely adjusting the feed amount of the second screw 6, the locking force can be independently adjusted at different positions, thereby achieving precise centering and flexible clamping of the barrel 1.

[0068] Specifically, the connection process of the quick connection mechanism between the injection molding machine barrel and the screw provided in this application is as follows: When starting to install the barrel and screw connection mechanism of the injection molding machine, the barrel 1, injection seat 3, and related components must first be prepared. The barrel 1 is the main body of the connection mechanism, which will bear the pressure and heat generated during the injection molding process. Therefore, it is essential to ensure its accurate positioning and perfect alignment of all components during installation.

[0069] First, place the barrel 1 on the injection seat 3. The injection seat 3 provides support, ensuring that the barrel 1 is securely fixed. The operator should ensure that the mating surfaces between the two sides of the barrel 1 and the injection seat 3 are flat, avoiding any deviation, which is crucial for subsequent positioning work.

[0070] Next, install the first screw 2. The first screw 2 needs to be inserted into the inner cavity of the barrel 1. At this time, the axial direction of the first screw 2 needs to match the length of the inner cavity of the barrel 1 to ensure that it can enter smoothly without resistance. When installing the first screw 2, the operator must ensure the alignment of the first screw 2 to prevent misalignment or uneven force transmission during injection molding.

[0071] With the initial connection of the barrel 1 and the first screw 2 completed, the next step is to connect the locking tongue guide sleeve 4 to the locking tongue 5. The locking tongue 5 provides axial locking force between the barrel 1 and the injection seat 3, thereby ensuring the stability of the entire connection structure. Operators should note that the fit between the end of the locking tongue 5 and the wedge 9 is crucial. The wedge-shaped surface of the end of the locking tongue 5 needs to mate with the corresponding wedge 9 on the injection seat 3. In this way, the locking tongue 5 can generate sufficient clamping force within the injection seat 3 to firmly fix the barrel 1 in place.

[0072] To ensure the smooth movement of the locking tongue 5 throughout the process, the locking tongue guide sleeve 4 plays a crucial role. The central portion of the locking tongue guide sleeve 4 is designed with a cavity within which the locking tongue 5 can slide freely, thus providing the necessary axial locking effect. The operator needs to confirm that there are no obstructions in the cavity of the locking tongue guide sleeve 4 and that the locking tongue 5 can slide smoothly within it; this is essential for the successful execution of the locking process.

[0073] After the locking tongue 5 and locking tongue guide sleeve 4 are installed, the next step is to install the pressure cap 8. The function of the pressure cap 8 is to connect and fix the locking tongue guide sleeve 4 to the injection seat 3, ensuring that the locking tongue 5 does not loosen axially. At this time, the operator needs to tightly connect the pressure cap 8 and the locking tongue guide sleeve 4 using the first screw 16. By screwing in the screw 16, the pressure cap 8 will firmly fix the locking tongue guide sleeve 4 in the corresponding position of the injection seat 3, thereby completing the fixing of the locking tongue clamping assembly.

[0074] To further enhance the connection's strength, the installation of the second screw 6 is also crucial. The second screw 6 passes through the gland 8 and is threaded into the threaded hole of the locking tongue 5. The operator needs to ensure that the second screw 6 can smoothly pass through the gland 8 and enter the threaded hole of the locking tongue 5. During the threaded connection, jamming or misalignment should be avoided, as this may affect the locking effect.

[0075] Once the second screw 6 is connected to the locking tongue 5, the locking nut 7 needs to be installed on the second screw 6 to ensure that it will not loosen during subsequent operations. Installing the locking nut 7 is a crucial step in preventing axial displacement of the connected components. By tightening the locking nut 7, the axial movement of the second screw 6 can be effectively restricted, thereby further reinforcing the entire connection structure.

[0076] Next is the installation of the semi-ring lifting assembly. The semi-ring connecting sleeve 12 is a key component connecting the drive shaft 11 and the inner screw 13. The operator needs to install the semi-ring connecting sleeve 12 onto the inner screw 13, ensuring a precise connection with the drive shaft 11. The semi-ring connecting sleeve 12 connects to the front thread of the drive shaft 11 via internal and external threads, thus achieving a threaded connection. At this point, the operator must pay special attention to ensure the threaded connection between the semi-ring connecting sleeve 12 and the drive shaft 11 is secure, avoiding loosening due to insecure threads.

[0077] After installing the semi-ring connecting sleeve 12, the semi-ring pressure plate 18 is fitted onto the inner screw 13. The function of the semi-ring pressure plate 18 is to provide stable support between the inner screw 13 and the drive shaft 11. During installation, the operator needs to ensure a good fit between the semi-ring pressure plate 18 and the inner screw 13, avoiding any loose or uneven connections.

[0078] To ensure a secure connection between the semi-ring pressure plate 18 and the semi-ring connecting sleeve 12, the second screw 14 needs to pass through the semi-ring pressure plate 18 and connect to the threaded hole of the inner screw 13. By tightening the second screw 14, the operator can ensure a secure connection between the semi-ring pressure plate 18 and the inner screw 13, preventing loosening or misalignment during use.

[0079] Once all components are installed, the connection structure of the barrel 1, screw 2, locking tongue clamping assembly, semi-ring lifting assembly, and other parts is complete, marking the final stage of the injection molding machine's connection work. Operators must carefully check that all connection points are secure and that the gaps between components meet standard requirements, ensuring there are no loose or unbalanced connections.

[0080] During disassembly, the operator must perform the operations in reverse order. First, loosen the second screw 14 to disconnect the inner screw 13 from the semi-ring pressure plate 18. Next, disassemble the threaded connection between the semi-ring connecting sleeve 12 and the drive shaft 11, ensuring that the inner screw 13 is separated from the semi-ring connecting sleeve 12. Finally, loosen the locking nut 7 of the second screw 6, remove the pressure cap 8 and the locking tongue guide sleeve 4, thereby completing the separation of the barrel 1 from the injection seat 3.

[0081] Through this series of operations, the connection and disassembly of the injection molding machine's barrel and screw can be completed efficiently, ensuring the stability and safety of the equipment during operation, while greatly improving the convenience of maintenance and repair.

[0082] In summary, the quick-connect mechanism between the injection molding machine barrel and screw provides a stable and efficient working process through the locking tongue clamping assembly, the semi-ring lifting assembly, and the design of precise threaded connections and axial clamping force. Each component plays a vital role in this process, ensuring the smooth operation and efficient production of the injection molding machine, while also significantly reducing the difficulty of equipment maintenance and repair.

[0083] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-mentioned technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of this application.

Claims

1. A quick connect mechanism for a barrel and screw of an injection molding machine, characterized by, The injection molding machine comprises a barrel, a first screw, an injection seat, a lock tongue pressing assembly and a half-ring lifting assembly. The lock tongue pressing assembly comprises a first lock tongue pressing component, a second lock tongue pressing component, a third lock tongue pressing component and a fourth lock tongue pressing component, each of which comprises a lock tongue, a lock tongue guide sleeve, a gland, a second screw, a lock nut and a guide flat key. The half-ring lifting assembly comprises a half-ring pressing plate, a half-ring connecting sleeve, a bushing, a second screw, an inner screw and an anti-loosening structure.

2. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 1, wherein, The first screw is arranged in the barrel, and the barrel is arranged in the injection seat.

3. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 2, wherein, The barrel is provided with a barrel pressing plate on one side, and the barrel pressing plate is arranged between the barrel and the injection seat.

4. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 3, wherein, The barrel is provided with a first positioning flat key and a second positioning flat key on both sides respectively.

5. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 2, wherein, The first lock tongue pressing component and the second lock tongue pressing component are embedded in the injection seat and arranged on both sides of the barrel respectively.

6. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 5, wherein, The lock tongue is arranged in the cavity and can slide along the cavity in the axial direction.

7. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 6, wherein, The guide flat key is arranged in the cavity and between the lock tongue guide sleeve and the lock tongue, so as to limit the rotation of the lock tongue and enable the lock tongue to move only in the axial direction.

8. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 6, wherein, The gland is arranged at the other end of the lock tongue guide sleeve and is fixedly connected with the lock tongue guide sleeve through a first screw.

9. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 8, wherein, The center of the gland is provided with a threaded hole, and the center of the lock tongue is provided with a threaded mounting hole.

10. A quick connect mechanism for a barrel and screw of an injection molding machine as defined in claim 9, wherein, The lock nut is arranged on the second screw to limit the axial position of the second screw.

11. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 6, wherein, The end of the lock tongue is provided with a wedge surface, and the barrel is provided with a wedge block matched with the wedge surface of the first lock tongue pressing component and the second lock tongue pressing component on both sides respectively, so as to provide horizontal pressing force for the barrel.

12. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 1, wherein, The half-ring connecting sleeve is arranged on the half-ring pressing plate, the half-ring pressing plate is arranged on the inner screw, and the front end of the transmission shaft is arranged between the half-ring connecting sleeve and the half-ring pressing plate.

13. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 12, wherein, The inner wall of the half-ring connecting sleeve is provided with an internal thread, the front end of the transmission shaft is provided with an external thread, and the front end of the transmission shaft is connected with the half-ring connecting sleeve through the internal and external threads.

14. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 12, wherein, The two sides of the front end of the transmission shaft, the half ring connecting sleeve and the half ring pressing plate are symmetrically provided with connecting holes, the inner walls of the connecting holes are provided with internal threads, and the internal threads penetrate the connecting holes of the half ring connecting sleeve and the front end of the transmission shaft to fix and connect the half ring connecting sleeve and the front end of the transmission shaft.

15. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 14, wherein, The internal threads penetrate the connecting holes of the half ring connecting sleeve and the front end of the transmission shaft to fix and connect the half ring connecting sleeve and the front end of the transmission shaft.

16. A quick connect mechanism for a barrel and screw of an injection molding machine as described in claim 15, wherein, The two sides of the half ring connecting sleeve are symmetrically provided with mounting cavities, the bushings are arranged in the mounting cavities, and the internal threads penetrate the bushings and are threadedly connected with the half ring pressing plate.

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