Injection-molding machine with a shuttle mechanism

Abstract

The utility model relates to the technical fields of injection molding machine, propose a kind of injection molding machine's shooting platform mechanism, including shooting platform seat and shooting shift screw assembly, shooting platform seat is movably close or away from mould locking head plate by shooting shift screw assembly, shooting platform seat left and right two outer sides are equipped with shooting shift screw assembly, each shooting shift screw assembly detachably installed between the outer side of mould locking head plate and shooting platform seat, and mould locking head plate detachably installed on injection molding machine. Injection molding machine's shooting platform mechanism by setting shooting shift screw assembly in shooting platform seat left and right two outer sides, and using detachable connection mode, significantly improve adaptability and flexibility. The first detachable connection cooperation structure between mould locking head plate and shooting shift screw assembly, and the second detachable connection cooperation structure between shooting shift screw assembly and shooting platform seat, so that user can replace mould locking head plate of different size specifications on the same injection molding machine, without replacing entire shooting platform mechanism, customer purchase shooting platform mechanism quantity need not too much, satisfy customer use demand.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding machines, and specifically to an injection stage mechanism for an injection molding machine. Background Technology

[0002] The existing injection unit mechanism of injection molding machines includes a first injection screw assembly and a second injection screw assembly. These assemblies are located on both sides of the injection front seat, with mounting holes for the screws on both inner sides of the injection front seat. This design prevents adjustment of the distance between the two screws in the first and second injection screw assemblies, making them unsuitable for different sizes of mold head plates. Furthermore, the first and second injection screw assemblies are positioned close to each other at the front of the injection unit. If the mold head plate is thick, its thickness will reduce the screw's injection stroke. Therefore, when the customer replaces the mold head plate with a thicker one, the screw's injection stroke is shorter, failing to provide the necessary injection function, resulting in poor customer satisfaction. For example, Chinese Patent Publication No. CN116749463A discloses a compact all-electric injection molding machine injection structure, assembly method, and application. Utility Model Content

[0003] This invention proposes an injection unit mechanism for injection molding machines. By placing the injection screw assembly on the left and right outer sides of the injection unit base and employing a detachable connection method, the adaptability and flexibility of this injection unit mechanism are significantly improved. The first detachable connection structure between the mold head plate and the injection screw assembly, and the second detachable connection structure between the injection screw assembly and the injection unit base, allow users to replace mold head plates of different sizes on the same injection molding machine without replacing the entire injection unit mechanism. This reduces the number of injection units customers need to purchase, meeting their usage requirements. Furthermore, the external layout of the injection screw assembly facilitates easy removal and replacement of the injection screw assembly on the injection unit base. This design is particularly suitable for injection molding scenarios involving the production of multi-specification products, enhancing the equipment's versatility and customer satisfaction.

[0004] An injection unit mechanism for an injection molding machine designed for this purpose includes an injection unit base and an injection screw assembly. The injection unit base is movable towards or away from the mold head plate via the injection screw assembly. The injection unit base is provided with injection screw assemblies on both its left and right outer sides. Each injection screw assembly is detachably installed between the outer sides of the mold head plate and the injection unit base. The mold head plate is detachably installed on the injection molding machine. Through a first detachable connection structure between the mold head plate and the injection screw assembly, and a second detachable connection structure between the injection screw assembly and the injection unit base, it is possible to replace mold head plates of different sizes and specifications on the injection molding machine.

[0005] The front end of the injection screw assembly is detachably connected to the mold clamping head plate, and the rear end of the injection screw assembly is detachably connected to the outside of the injection table base. The rear end of the injection screw assembly is located close to the rear of the injection table base so that the front end of the injection screw assembly has enough space to accommodate mold clamping head plates of different thicknesses.

[0006] The first detachable connection structure includes a connecting rod disposed on the mold head plate and a jetting connector that cooperates with the jetting screw assembly. A movable locking rod is provided between the connecting rod and the jetting connector. The connecting rod and the jetting connector are respectively inserted into the movable locking rod, and the movable locking rod is telescopically disposed between the connecting rod and the jetting connector. The movable locking rod realizes the connection or separation of the connecting rod and the jetting connector through axial telescopic movement.

[0007] A pin is provided between the injection-shifting connector and the movable locking rod. When the locking mold head plate and the injection-shifting screw assembly are assembled, the pin passes through the injection-shifting connector and the movable locking rod so that the movable locking rod is locked on the injection-shifting connector.

[0008] When the mold clamping head plate and the injection screw assembly are disassembled, the insertion pin disengages from the injection connector and the movable locking rod, and the movable locking rod retracts axially into the injection connector and disengages from the connecting rod.

[0009] The connecting rod is detachably mounted on the locking head plate.

[0010] The insertion locking direction of the pin is perpendicular to the axial extension and retraction direction of the movable locking rod, forming a crisscross locking structure.

[0011] The insertion pin is inserted into or disengaged from the movable locking rod to lock or unlock the movable locking rod and the shooting connector.

[0012] A pad is provided at the connection between the ballistic screw assembly and the ballistic platform. The pad is detachably installed at the connection between the ballistic screw assembly and the ballistic platform. By installing pads of different thicknesses or removing the pads, the distance between the ballistic screw assemblies on the left and right sides of the ballistic platform can be adjusted.

[0013] The launch platform base is provided with a transmission gear at the rear end of the corresponding shooting screw assembly. The transmission gear is detachably installed on the launch platform base and is rotatably mounted on the launch platform base. Each shooting screw assembly has a screw gear at the rear end that meshes with the transmission gear.

[0014] When adjusting the distance between the lead screw assemblies on the left and right sides of the injection stage, replace the transmission gears with different pitch circle diameters on the injection stage, or replace the lead screw gears with different pitch circle diameters on the rear end of the lead screw assembly, and ensure that the replaced transmission gears maintain meshing with the lead screw gears.

[0015] The launcher base is equipped with a shooting motor that is connected to the transmission gear and a motor bracket for fixing the shooting motor.

[0016] The injection stage is also equipped with an injection motor for driving the injection screw and a fixing plate for mounting and fixing the injection motor.

[0017] During the process of replacing the lead screw gear on the injection stage, the injection motor and the fixing plate are removed from the injection stage, and the injection transfer motor and the motor bracket are removed from the injection stage; so as to remove the lead screw gear from the injection stage.

[0018] The launcher base is provided with a transversely extended portion and a bent portion connected to the transversely extended portion, and the fixing plate is detachably installed on the rear end of the bent portion;

[0019] The transmission gear is detachably mounted on the launcher base along the lateral extension and the bending section.

[0020] The ejector screw assembly includes an ejector spring seat, a nut sleeve and an ejector screw, and the first detachable connection structure includes an ejector connector disposed between the mold locking head plate and the ejector screw assembly;

[0021] The ejector connector is inserted through the ejector spring seat, the nut sleeve is fixed on the ejector spring seat, and the ejector screw is inserted into the nut sleeve and the ejector connector;

[0022] The ejector spring seat contains an ejector spring, and the ejector spring seat is provided with a guide rod. The guide rod passes through the ejector spring seat, and both ends of the guide rod are provided with connecting blocks. The connecting blocks are detachably installed on the outside of the ejector base.

[0023] The injection spring seat and nut sleeve are fixed to the mold head plate relative to each other through the injection connector; when the injection screw rotates, the injection table seat can move closer to or away from the mold head plate, and the guide rod moves back and forth along the injection spring seat through the connecting blocks at both ends. When the injection table seat moves closer to the mold head plate, one of the connecting blocks acts on the injection spring seat and squeezes the injection spring, so that the injection spring provides the corresponding injection pressure.

[0024] The lead screw is provided with a detachable connecting seat that is mounted on the firing table, and a pad between the connecting seat and / or connecting block and the firing table is used to adjust the distance between the lead screw and the outer side of the firing table.

[0025] The beneficial technical effects of this utility model are as follows:

[0026] The injection unit mechanism for injection molding machines significantly improves adaptability and flexibility by placing the injection screw assembly on the left and right outer sides of the injection unit base and using a detachable connection method. The first detachable connection structure between the mold head plate and the injection screw assembly, and the second detachable connection structure between the injection screw assembly and the injection unit base, allow users to replace different sizes of mold head plates on the same injection molding machine without replacing the entire injection unit mechanism. This reduces the number of injection units customers need to purchase, meeting their usage requirements. Furthermore, the external layout of the injection screw assembly facilitates easy removal and replacement of the injection screw assembly on the injection unit base. This design is particularly suitable for injection molding scenarios involving the production of multiple product specifications, enhancing equipment versatility and customer satisfaction. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention, showing a pad between the injection stage and the injection lead screw assembly.

[0028] Figure 2 This is a three-dimensional structural diagram of the unlocked state of the insertion pin in an embodiment of the present invention.

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0030] Figure 4 This is a three-dimensional structural diagram of the movable locking rod retracting into the ejector connector after the insertion pin is unlocked, according to an embodiment of the present invention.

[0031] Figure 5 for Figure 4 Enlarged view of section B in the middle.

[0032] Figure 6 This is an exploded view of the assembly structure of the lead screw assembly and the launch platform according to an embodiment of the present invention.

[0033] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0034] Figure 8 This is an exploded view of the assembly of the lead screw assembly and the movable locking rod according to an embodiment of the present invention.

[0035] Figure 9 for Figure 8 Enlarged view of point D in the middle.

[0036] Figure 10 This is an exploded view of the assembly structure of the ejector screw assembly and ejector connector according to an embodiment of the present invention.

[0037] Figure 11This is a schematic diagram showing the assembly disassembly of the lead screw assembly and the injection stage without any spacers in an embodiment of the present invention.

[0038] Figure 12 This is a three-dimensional structural diagram of a transmission gear detaching from the injection seat along the lateral extension of an embodiment of the present invention.

[0039] Figure 13 This is a three-dimensional structural diagram of a transmission gear that moves from the lateral extension to the bend in one embodiment of the present invention.

[0040] Figure 14 This is a three-dimensional structural diagram of the transmission gear finally disengaging from the injection seat along the bend in one embodiment of the present invention. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] See Figures 1-14 An injection stage mechanism for an injection molding machine includes an injection stage base 3 and an injection screw assembly 2. The injection stage base 3 is movable towards or away from a mold head plate 1 via the injection screw assembly 2. The injection stage base 3 is provided with injection screw assemblies 2 on both its left and right outer sides. Each injection screw assembly 2 is detachably installed between the outer sides of the mold head plate 1 and the injection stage base 3. The mold head plate 1 is detachably installed on the injection molding machine. Through a first detachable connection and fit structure between the mold head plate 1 and the injection screw assembly 2, and a second detachable connection and fit structure between the injection screw assembly 2 and the injection stage base 3, it is possible to replace the mold head plate 1 of different sizes and specifications on the injection molding machine.

[0043] The injection unit mechanism for injection molding machines significantly improves adaptability and flexibility by placing the injection screw assembly 2 on the left and right outer sides of the injection unit base 3 and adopting a detachable connection method. The first detachable connection structure between the clamping head plate 1 and the injection screw assembly 2, and the second detachable connection structure between the injection screw assembly 2 and the injection unit base 3, allow users to replace different sizes of the clamping head plate 1 on the same injection molding machine without replacing the entire injection unit mechanism. This reduces the number of injection units customers need to purchase, meeting their usage requirements. Furthermore, the external layout of the injection screw assembly 2 facilitates easy removal and replacement of the injection screw assembly 2 on the injection unit base 3. This design is particularly suitable for injection molding scenarios involving the production of multi-specification products, enhancing equipment versatility and customer satisfaction.

[0044] The front end of the injection screw assembly 2 is detachably connected to the mold clamping head plate 1, and the rear end of the injection screw assembly 2 is detachably connected to the outside of the injection table base 3. The rear end of the injection screw assembly 2 is located close to the rear of the injection table base 3 so that the front end of the injection screw assembly 2 has enough space to accommodate the installation of mold clamping head plates 1 of different thicknesses.

[0045] The injection screw assembly 2 is installed near the rear of the injection unit 3, with ample space reserved at the front, effectively solving the limitation on the injection stroke caused by variations in the thickness of the mold head plate 1. By moving the force point of the injection screw assembly 2 rearward, the effective working stroke of the screw is extended. Even with a thicker mold head plate 1, the injection unit 3 can still maintain sufficient movement distance to meet injection requirements. Furthermore, the detachable connection method allows for the replacement of mold head plates 1 of different sizes. Users only need to disconnect the injection screw assembly 2 from the mold head plate 1. When the mold head plate 1 is replaced, the distance between the injection screw assemblies 2 on both sides of the injection unit 3 changes, so the connection between the injection screw assembly 2 and the injection unit 3 also needs to be disconnected. This eliminates the need for additional modifications to the equipment structure. This design significantly improves the equipment's compatibility and ease of maintenance, making it particularly suitable for production environments with frequent mold changes.

[0046] The first detachable connection structure includes a connecting rod 4 disposed on the mold head plate 1 and an injection connecting member 5 that cooperates with the injection screw assembly 2. A movable locking rod 6 is provided between the connecting rod 4 and the injection connecting member 5. The connecting rod 4 and the injection connecting member 5 are respectively inserted into the movable locking rod 6, and the movable locking rod 6 is telescopically disposed between the connecting rod 4 and the injection connecting member 5. The movable locking rod 6 realizes the connection or separation of the connecting rod 4 and the injection connecting member 5 through axial telescopic movement.

[0047] The first detachable connection structure achieves quick connection or separation between the connecting rod 4 and the injection connector 5 through the axial telescopic movement of the movable locking rod 6, which is simple to operate and highly reliable. The plug-in design of the connecting rod 4 and the injection connector 5 ensures a proper fit between the mold head plate 1 and the injection screw assembly 2, preventing loosening or misalignment during the injection process. The telescopic function of the movable locking rod 6 further simplifies the disassembly steps; the user only needs to pull or push the movable locking rod 6 axially to complete the assembly or separation, significantly reducing the time required to replace the mold head plate 1.

[0048] A pin 7 is provided between the injection-shifting connector 5 and the movable locking rod 6. When the locking mold head plate 1 and the injection-shifting screw assembly 2 are assembled, the pin 7 passes through the injection-shifting connector 5 and the movable locking rod 6 so that the movable locking rod 6 is locked on the injection-shifting connector 5.

[0049] When the mold clamping head plate 1 and the injection screw assembly 2 are disassembled, the insertion pin 7 disengages from the injection connector 5 and the movable locking rod 6, and the movable locking rod 6 retracts axially into the injection connector 5 and disengages from the connecting rod 4.

[0050] The connecting rod 4 is detachably installed on the locking head plate 1.

[0051] In this embodiment, one end of the connecting rod 4 is provided with a connecting flange with through bolts, and the connecting flange is installed on the locking head plate 1 by bolt detachment.

[0052] The transverse insertion design of the pin 7 forms a locking structure with the movable locking rod 6. When the pin 7 is inserted into the injection connector 5 and the movable locking rod 6, the movable locking rod 6 is firmly locked, preventing accidental disengagement due to vibration during injection. For disassembly, simply pull out the pin 7, and the movable locking rod 6 will retract, achieving quick separation. The detachable installation of the connecting rod 4 further improves flexibility. When the user replaces the mold head plate 1, the original connecting rod 4 can be retained, and after disassembly, it can be installed on the new mold head plate 1.

[0053] The insertion locking direction of the pin 7 is perpendicular to the axial extension and retraction direction of the movable locking rod 6, forming a crisscross locking structure.

[0054] The insertion pin 7 is inserted into or disengaged from the movable locking rod 6 to lock or unlock the movable locking rod 6 and the shooting connector 5.

[0055] The insertion and disengagement of the pin 7 is intuitive and simple, requiring no special tools and reducing maintenance difficulty. This design also allows for high-strength mechanical locking in confined spaces, avoiding the rotational space required for traditional bolted connections. The complete disengagement of the pin 7 during unlocking ensures the free extension and retraction of the movable locking rod 6, preventing jamming. This locking method is particularly suitable for heavy-duty mechanical connections requiring frequent disassembly.

[0056] In this embodiment, a circular locking hole for inserting a pin 7 is provided between the movable locking rod 6 and the shooting connector 5.

[0057] A pad 8 is provided at the connection between the ball screw assembly 2 and the ball table 3. The pad 8 is detachably installed at the connection between the ball screw assembly 2 and the ball table 3. By installing pads 8 of different thicknesses or removing pads 8, the distance between the ball screw assemblies 2 on the left and right sides of the ball table 3 can be adjusted.

[0058] The introduction of the spacer block 8 makes it possible to adjust the spacing of the injection screw assemblies 2 on both sides of the injection station 3. Users can adapt to different widths of the mold clamping head plate 1 by replacing the spacer block 8 with one of different thicknesses or by completely removing the spacer block 8. This adjustment method does not require replacing the entire structure; precise centering can be achieved by adjusting only the thickness of the local spacer block 8, significantly reducing equipment modification costs. The standardized design of the spacer block 8 also simplifies spare parts management; users only need to stock a few commonly used thicknesses of spacer block 8 to cover most production needs. This design is particularly suitable for flexible manufacturing systems that produce multiple specifications in small batches.

[0059] The firing platform 3 is provided with a transmission gear 9 at the rear end of the corresponding firing screw assembly 2. The transmission gear 9 is detachably installed on the firing platform 3 and is rotatably mounted on the firing platform 3. Each firing screw assembly 2 is provided with a screw gear 10 at the rear end that meshes with the transmission gear 9.

[0060] When adjusting the distance between the left and right sides of the ball screw assembly 2 of the ball screw base 3, the transmission gear 9 with a different pitch circle diameter is replaced on the ball screw base 3, or the ball screw gear 10 with a different pitch circle diameter is replaced on the rear end of the ball screw assembly 2, and the replaced transmission gear 9 and the ball screw gear 10 are engaged in transmission.

[0061] By replacing the pitch circle diameter of the transmission gear 9 or the lead screw gear 10, the gear meshing accuracy can be maintained at all times when adjusting the distance between the two lead screw assemblies 2. Users can select different specifications of gear sets according to actual distance requirements without the need for custom-made special parts. The detachable installation of the transmission gear 9 also facilitates maintenance and replacement, extending the service life of the transmission system. This technology is particularly suitable for dual lead screw projection systems that require high-precision synchronous drive.

[0062] In this embodiment, the launcher base 3 is provided with a limiting step 24 corresponding to the transmission gear 9. The transmission gear 9 has a through hole in the middle that passes through the launcher base 3. One side of the transmission gear 9 is limited and abuts against the limiting step 24 of the launcher base 3. The launcher base 3 is provided with a limiting member 25 corresponding to the other side of the transmission gear 9. The limiting member 25 is fixed to the mounting slope of the launcher base 3 by screws. The transmission gear 9 is limited between the limiting step 24 and the limiting member 25. The launcher base 3 is provided with limiting steps 24 distributed at four corners, and each limiting step 24 corresponds to a limiting member 25.

[0063] In this embodiment, the launcher base 3 has a square portion 26 or a round hole portion corresponding to the through hole of the transmission gear 9. When the transmission gear 9 rotates, the transmission gear 9 rotates around the axis of the square portion 26 or the round hole portion.

[0064] The shooting platform 3 is provided with a shooting motor 11 that is connected to the transmission gear 9, and a motor bracket 12 for fixing the shooting motor 11.

[0065] The injection stage 3 is also provided with an injection motor 13 for driving the injection screw, and a fixing plate 14 for mounting and fixing the injection motor 13.

[0066] During the process of replacing the lead screw gear 10 on the injection stage 3, the injection motor 13 and the fixing plate 14 are removed from the injection stage 3, and the injection transfer motor 11 and the motor bracket 12 are removed from the injection stage 3; so as to remove the lead screw gear 10 from the injection stage 3.

[0067] The modular disassembly design of the injection motor 11 and the glue injection motor 13 provides operational space for replacing the lead screw gear 10. The detachable installation of the motor bracket 12 and the mounting plate 14 allows maintenance personnel to quickly access the transmission gear 9 and the lead screw gear 10, significantly reducing maintenance time. The temporary removal of the glue injection motor 13 avoids spatial interference issues during gear replacement, while the separation of the injection motor 11 facilitates adjustments to the installation position of the transmission gear 9. This design significantly improves the maintainability of the equipment, making it particularly suitable for trial production environments requiring frequent gear configuration adjustments.

[0068] In this embodiment, the lead screw gear 10 is sleeved on the outside of the ejector screw 19. The ejector screw 19 is provided with a limiting wheel for limiting the lead screw gear 10 on the ejector screw 19. An anti-detachment block is provided at the end of the ejector screw 19. The anti-detachment block is detachably installed on the limiting wheel by bolts. The limiting wheel is connected to the connecting seat 23. The limiting wheel and the connecting seat 23 are integrally formed by metal processing.

[0069] In this embodiment, both the motor bracket 12 and the fixing plate 14 are fixed to the launcher base 3 by bolt detachment.

[0070] The launcher base 3 is provided with a transverse extension 15 arranged in a horizontal direction and a bending part 16 connected to the transverse extension 15. The fixing plate 14 is detachably installed on the rear end of the bending part 16.

[0071] The transmission gear 9 is detachably mounted on the launcher base 3 along the lateral extension 15 and the bending portion 16.

[0072] The structural design of the lateral extension 15 and the bending section 16 optimizes the spatial layout of the injection unit 3, providing a stable support platform for the installation of the transmission gear 9. The detachable installation of the fixing plate 14 at the rear end of the bending section 16 ensures the fixing strength of the injection motor 13 while facilitating disassembly for gear maintenance. The installation method of the transmission gear 9 along the bending section 16 makes full use of the three-dimensional space of the injection unit 3. This structural design is particularly suitable for the space optimization requirements of compact injection molding machines.

[0073] The ejector screw assembly 2 includes an ejector spring seat 17, a nut sleeve 18 and an ejector screw 19. The first detachable connection structure includes an ejector connector 5 disposed between the mold locking head plate 1 and the ejector screw assembly 2.

[0074] The ejector connector 5 is inserted through the ejector spring seat 17, the nut sleeve 18 is fixed on the ejector spring seat 17, and the ejector screw 19 is inserted into the nut sleeve 18 and the ejector connector 5.

[0075] The ejection spring seat 17 is provided with an ejection spring 22, and a guide rod 20 is provided on the ejection spring seat 17. The guide rod 20 passes through the ejection spring seat 17, and a connecting block 21 is provided at both ends of the guide rod 20. The connecting block 21 is detachably installed on the outside of the injection table seat 3.

[0076] The injection spring seat 17 and the nut sleeve 18 are fixed to the mold head plate 1 relative to each other through the injection connector 5; when the injection screw 19 rotates, the injection stage 3 can move closer to or away from the mold head plate 1, and the guide rod 20 moves back and forth along the injection spring seat 17 through the connecting blocks 21 at both ends. When the injection stage 3 moves closer to the mold head plate 1, one of the connecting blocks 21 acts on the injection spring seat 17 and squeezes the injection spring 22, so that the injection spring 22 provides the corresponding injection pressure.

[0077] The lead screw 19 is provided with a connecting seat 23 that is detachably installed on the firing platform 3. The connecting seat 23 and / or the connecting block 21 are spacers 8 between the firing platform 3 and the outer side of the firing platform 3 for adjusting the distance between the lead screw 19 and the outer side of the firing platform 3.

[0078] In this embodiment, the connecting block 21 and the corresponding pad 8 are fixedly connected by bolts. The connecting block 21 is installed on the outside of the shooting platform 3 by bolts. The connecting seat 23 and the corresponding pad 8 are fixedly connected by bolts. The connecting seat 23 is installed on the outside of the shooting platform 3 by bolts, so that the entire shooting screw assembly 2 is installed on the outside of the shooting platform 3 in a detachable manner.

[0079] The injection spring 22 provides injection pressure when the injection motor 11 is de-energized. Specifically, when the injection motor 11 drives the injection stage mechanism close to the mold, the injection nozzle hits the mold, and the injection spring 22 is compressed, generating injection force. After the injection motor 11 is de-energized, it is in a brake-locked state, and the injection force is provided by the compressed injection spring 22, preventing the nozzle from leaking material. The injection motor 11 does not need to continuously operate to provide injection force, achieving energy saving. The guide rod 20 limits the injection movement trajectory through the connecting block 21, ensuring the linearity of the injection stage 3's movement. The application of the pad 8 at the connecting seat 23 or connecting block 21 further expands the pitch adjustment range of the injection screw 19. The design of the nut sleeve 18 and the injection screw 19 balances transmission accuracy and maintainability, allowing users to replace worn parts individually. This structure is particularly suitable for precision injection molding scenarios with high-frequency injection operations.

[0080] In this embodiment, the ejector spring seat 17 includes a seat body and a front connecting plate fixed to the front end of the seat body by screws. A positioning block is provided inside the seat body. The ejector connector 5 passes through the front connecting plate and the positioning block and abuts against the inner side of the seat body. That is, the ejector connector 5 passes through the ejector spring seat 17, and one end of the ejector connector 5 abuts against the inner side of the ejector spring seat 17 without passing through the ejector spring seat 17. Ejector springs 22 are provided above and below the ejector connector 5. The ejector springs 22 are located between the positioning block and the front connecting plate. A connecting shaft for inserting the ejector spring 22 is provided between the positioning block and the front connecting plate. The connecting shaft passes through the positioning block and the front connecting plate, and the end of the connecting shaft extends out of the outer side of the front connecting plate.

[0081] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An injection stage mechanism for an injection molding machine, comprising an injection stage base (3) and an injection screw assembly (2), wherein the injection stage base (3) is movable toward or away from the mold clamping head plate (1) via the injection screw assembly (2), characterized in that: The injection stage (3) is provided with injection screw assemblies (2) on both the left and right outer sides. Each injection screw assembly (2) is detachably installed between the outer sides of the mold head plate (1) and the injection stage (3). The mold head plate (1) is detachably installed on the injection molding machine. Through the first detachable connection and cooperation structure between the mold head plate (1) and the injection screw assembly (2), and the second detachable connection and cooperation structure between the injection screw assembly (2) and the injection stage (3), it is possible to replace the mold head plate (1) of different sizes and specifications on the injection molding machine.

2. The injection unit mechanism for an injection molding machine according to claim 1, characterized in that: The front end of the ejector screw assembly (2) is detachably connected to the mold clamping head plate (1), and the rear end of the ejector screw assembly (2) is detachably connected to the outside of the ejector base (3). The rear end of the ejector screw assembly (2) is located close to the rear of the ejector base (3) so that the front end of the ejector screw assembly (2) has enough space to accommodate the installation of mold clamping head plates (1) of different thicknesses.

3. The injection unit mechanism for an injection molding machine according to claim 1, characterized in that: The first detachable connection structure includes a connecting rod (4) set on the mold head plate (1) and a shooting connector (5) that cooperates with the shooting screw assembly (2). A movable locking rod (6) is provided between the connecting rod (4) and the shooting connector (5). The connecting rod (4) and the shooting connector (5) are respectively inserted into the movable locking rod (6), and the movable locking rod (6) is telescopically and movably set between the connecting rod (4) and the shooting connector (5). The movable locking rod (6) realizes the connection or separation of the connecting rod (4) and the shooting connector (5) through axial telescopic movement.

4. The injection unit mechanism for an injection molding machine according to claim 3, characterized in that: A pin (7) is provided between the injection-shifting connector (5) and the movable locking rod (6). When the mold locking head plate (1) and the injection-shifting screw assembly (2) are assembled, the pin (7) passes through the injection-shifting connector (5) and the movable locking rod (6) so that the movable locking rod (6) is locked on the injection-shifting connector (5). When the mold clamping head plate (1) and the injection screw assembly (2) are disassembled, the insertion pin (7) disengages from the injection connector (5) and the movable locking rod (6), and the movable locking rod (6) retracts axially into the injection connector (5) and disengages from the connecting rod (4). The connecting rod (4) is detachably installed on the locking head plate (1).

5. The injection unit mechanism for an injection molding machine according to claim 4, characterized in that: The insertion locking direction of the pin (7) is perpendicular to the axial extension and retraction direction of the movable locking rod (6) and forms a cross-shaped locking structure. The pin (7) is inserted into or disengaged from the movable locking rod (6) to lock or unlock the movable locking rod (6) and the ejector connector (5).

6. The injection unit mechanism for an injection molding machine according to claim 1, characterized in that: A pad (8) is provided at the connection between the ball screw assembly (2) and the ball table (3). The pad (8) is detachably installed at the connection between the ball screw assembly (2) and the ball table (3). By installing pads (8) of different thicknesses or removing pads (8), the distance between the ball screw assemblies (2) on the left and right sides of the ball table (3) can be adjusted.

7. The injection unit mechanism for an injection molding machine according to claim 6, characterized in that: The firing platform (3) is provided with a transmission gear (9) at the rear end of the corresponding firing screw assembly (2). The transmission gear (9) is detachably installed on the firing platform (3) and is rotatably mounted on the firing platform (3). Each firing screw assembly (2) is provided with a screw gear (10) meshing with the transmission gear (9) at the rear end. When adjusting the distance between the left and right sides of the injection stage (3) and the injection screw assembly (2), the transmission gear (9) with a different pitch circle diameter is replaced on the injection stage (3), or the screw gear (10) with a different pitch circle diameter is replaced on the rear end of the injection screw assembly (2), and the replaced transmission gear (9) and the screw gear (10) are engaged in transmission.

8. The injection unit mechanism for an injection molding machine according to claim 7, characterized in that: The shooting platform (3) is provided with a shooting motor (11) that is connected to the transmission gear (9) and a motor bracket (12) for fixing the shooting motor (11). The injection stage (3) is also provided with an injection motor (13) for driving the injection screw and a fixing plate (14) for mounting and fixing the injection motor (13). During the process of replacing the lead screw gear (10) on the injection stage (3), the injection motor (13) and the fixing plate (14) are removed from the injection stage (3), and the injection transfer motor (11) and the motor bracket (12) are removed from the injection stage (3) to remove the lead screw gear (10) from the injection stage (3).

9. The injection unit mechanism for an injection molding machine according to claim 8, characterized in that: The launcher base (3) is provided with a transverse extension (15) arranged in a horizontal direction and a bending part (16) connected to the transverse extension (15). The fixing plate (14) is detachably installed on the rear end of the bending part (16). The transmission gear (9) is detachably mounted on the launcher base (3) along the lateral extension (15) and the bending part (16).

10. The injection unit mechanism for an injection molding machine according to claim 1, characterized in that: The ejector screw assembly (2) includes an ejector spring seat (17), a nut sleeve (18) and an ejector screw (19). The first detachable connection structure includes an ejector connector (5) disposed between the mold locking head plate (1) and the ejector screw assembly (2). The ejector connector (5) is inserted through the ejector spring seat (17), the nut sleeve (18) is fixed on the ejector spring seat (17), and the ejector screw (19) is inserted into the nut sleeve (18) and the ejector connector (5). The ejector spring seat (17) is provided with an ejector spring (22), and the ejector spring seat (17) is provided with a guide rod (20). The guide rod (20) passes through the ejector spring seat (17). Both ends of the guide rod (20) are provided with connecting blocks (21). The connecting blocks (21) are detachably installed on the outside of the ejector base (3). The ejector spring seat (17) and the nut sleeve (18) are fixed relative to the mold head plate (1) through the ejector connector (5); when the ejector screw (19) rotates, the ejector seat (3) can move closer to or away from the mold head plate (1), and the guide rod (20) moves back and forth along the ejector spring seat (17) through the connecting blocks (21) at both ends. When the ejector seat (3) moves closer to the mold head plate (1), one of the connecting blocks (21) acts on the ejector spring seat (17) and squeezes the ejector spring (22) so that the ejector spring (22) provides the corresponding ejector pressure. The ejector screw (19) is provided with a detachable connecting seat (23) installed on the ejector base (3), and a pad (8) between the connecting seat (23) and / or the connecting block (21) and the ejector base (3) for adjusting the distance between the ejector screw (19) and the outer side of the ejector base (3).

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