A horizontal injection molding machine for TPU midsoles with a quick mold change structure

Abstract

This utility model discloses a TPU midsole horizontal injection molding machine with a quick mold changing structure. The mold assembly includes a fixed mold and a moving mold. A fixed plate is fixed on the top of the frame. The fixed mold is fixed to one side of the fixed plate with screws. A movable plate for mounting the moving mold is provided on the side of the fixed plate away from the injection port. Guide rails for pushing or pushing auxiliary mold assemblies into and out of the injection molding machine are installed on one side of both the movable plate and the fixed plate. One end of the guide rail is provided with an alignment structure that can quickly align with the mold changing carriage. This utility model provides a guide rail including a track and rollers on one side of the movable plate and the fixed plate. A triangular notch is opened at one end of the track. The alignment block on the mold changing carriage guide frame is inserted into the notch. Even if there is a slight deviation in the initial position of the mold changing carriage, the alignment block can be guided back to its original position by the inclined surface of the inner wall of the notch, without the need for repeated manual calibration, thus achieving quick alignment between the mold changing carriage and the injection molding machine.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically a TPU midsole horizontal injection molding machine with a quick mold changing structure. Background Technology

[0002] The TPU midsole horizontal injection molding machine is a device specifically designed for producing TPU shoe midsoles. Molten TPU raw material is injected into the cavity of the mold assembly through the injection port, and after cooling and molding, the TPU midsole product is obtained. Its horizontal structure design facilitates mold installation and raw material transportation, and makes it easy to unload the product.

[0003] In the existing technology, when a TPU midsole horizontal injection molding machine needs to change the mold to produce different models of midsoles, the mold transfer and replacement operation is usually completed with the help of a mold changing cart: first, the old mold to be replaced is removed from the fixed mold and moving mold installation position of the injection molding machine and placed on the bearing structure of the mold changing cart. Then, the new mold is transferred to the side of the injection molding machine by the mold changing cart and the new mold is connected with the corresponding installation structure of the fixed mold and moving mold.

[0004] However, during the docking process between the mold changing carriage and the injection molding machine, manual operation is required to brake and adjust the position of the mold changing carriage. This can easily lead to misalignment between the mold changing carriage and the guide rails on the moving and stationary molds of the injection molding machine. This may affect the smooth pushing of the mold into the injection molding machine, requiring the mold changing carriage to be readjusted before pushing the mold in, thus affecting the mold changing efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a TPU midsole horizontal injection molding machine with a quick mold changing structure. By setting an auxiliary mold ejection or insertion guide rail on one side of the moving plate and the fixed plate, and setting an alignment structure at one end of the guide rail for quick alignment with the mold changing carriage, and setting a locking structure on one side of the fixed plate and the moving plate to prevent misalignment of the mold changing carriage, the quick alignment and locking of the mold changing carriage and the injection molding machine are realized, thereby improving the mold changing efficiency in the TPU midsole production process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a TPU midsole horizontal injection molding machine with a quick mold changing structure, including a frame, an injection port installed above the frame, and a mold assembly;

[0007] The mold assembly includes a fixed mold and a moving mold. A fixed plate is fixed on the top of the frame. The fixed mold is fixed to one side of the fixed plate with screws. A movable plate for mounting the moving mold is provided on the side of the fixed plate away from the injection port. Guide rails for pushing the auxiliary mold assembly out or into the injection molding machine are installed on one side of both the movable plate and the fixed plate. One end of the guide rail is provided with an alignment structure that can quickly align with the mold changing carriage. A locking structure is provided on one side of the fixed plate and the movable plate to prevent the mold changing carriage from being misaligned.

[0008] Preferably, the guide rail includes a track and rollers. The track is fixedly connected to a fixed plate and a movable plate by screws, and the rollers are rotatably connected to the track by a rotating shaft.

[0009] Preferably, the alignment structure includes a notch at one end of the track, the notch being triangular in shape, a guide frame for placing the mold being installed on the top of the mold changing carriage, an alignment block being fixed at one end of the guide frame, the alignment block being inserted into the notch, and a connecting structure being installed at the bottom of the alignment block to connect the alignment block to the notch.

[0010] Preferably, the connecting structure is installed on the two sides of the guide frame with insert rods, and the inner walls on both sides of the notch are provided with insertion holes, and the insert rods are inserted into the insertion holes.

[0011] Preferably, the connection structure further includes a motor for driving the extension and retraction of the insertion rod. The output end of the motor is fixed with a pressing block capable of pressing one end of the insertion rod. The pressing block is spindle-shaped. The guide frame has an annular cavity and a rectangular cavity communicating with the annular cavity. A rotating rod is fixed in the annular cavity. One end of the rotating rod is rotatably connected to the pressing block. One end of the insertion rod is inserted into the annular cavity. The other end of the insertion rod is inserted into the rectangular cavity and passes through the guide frame. A spring is sleeved on the outer wall of the insertion rod, and a limit plate is fixed on the outer wall of the insertion rod. One end of the spring abuts against the limit plate, and the other end of the spring abuts against the inner wall of the rectangular cavity.

[0012] Preferably, the locking structure includes a guard plate fixed to one side of the guide frame, a positioning hole on one side of the guard plate, and a sliding groove on one side of both the fixed plate and the movable plate. A positioning rod is slidably connected in the sliding groove, and a compression spring is fixed in the sliding groove. One end of the compression spring is fixedly connected to the positioning rod, and the positioning rod is inserted into the positioning hole.

[0013] Preferably, the mold assembly further includes a hydraulic cylinder that provides driving force to the moving plate, a mounting plate is fixed to the top of the frame, a guide rod is fixed between the mounting plate and the fixed plate, the guide rod passes through the four corners of the moving plate and is slidably connected to the moving plate through bushings, and the telescopic end of the hydraulic cylinder is fixedly connected to the moving plate.

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

[0015] 1. This utility model provides a guide rail including a track and rollers on one side of the moving plate and the fixed plate. A triangular notch is opened at one end of the track. The alignment block on the mold changing carriage guide frame is inserted into the notch. Due to the self-guiding characteristics of the triangular structure, even if there is a slight deviation in the initial position of the mold changing carriage, the alignment block can be guided back to its original position by the inclined surface of the inner wall of the notch. No manual repeated calibration is required, thus realizing the rapid alignment of the mold changing carriage and the injection molding machine.

[0016] 2. In the connection structure at the bottom of the alignment block of this utility model, the motor drives the spindle-shaped extrusion block to rotate. The extrusion block can automatically extrude the insertion rod, so that the insertion rod overcomes the spring force and inserts into the insertion hole of the track notch, completing the automatic fixing or automatic reset after alignment; realizing alignment after pushing in, making it faster to use.

[0017] 3. The guide plate on one side of the guide frame of this utility model has a positioning hole. The positioning rod is slidably connected in the groove on one side of the fixed plate and the moving plate. The compression spring in the groove always applies a spring force toward the guard plate to the positioning rod. When the mold changing car is aligned, the positioning rod can be automatically inserted into the positioning hole to limit the longitudinal displacement of the mold changing car. This makes the mold changing process safer and helps to reduce the risk of mold damage during the mold changing process. Attached Figure Description

[0018] Figure 1 This is an isometric drawing of this utility model;

[0019] Figure 2 This is a schematic diagram of the locking structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the motor position in the alignment structure of this utility model;

[0021] Figure 4 This is a utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the alignment structure inside the guide frame of this utility model;

[0023] Figure 6 This is a schematic diagram of the locking structure of this utility model.

[0024] In the diagram: 1. Frame; 2. Injection port; 3. Fixed mold; 4. Moving mold; 5. Fixed plate; 6. Moving plate; 7. Guide rail; 8. Alignment structure; 9. Locking structure; 10. Mold changing carriage;

[0025] 701. Track; 702. Roller;

[0026] 801. Notch; 802. Guide frame; 803. Alignment block; 804. Insert rod; 805. Insertion hole; 806. Motor; 807. Extrusion block; 808. Annular cavity; 809. Rectangular cavity; 810. Rotating rod; 811. Spring; 812. Limiting plate;

[0027] 901, Guard plate; 902, Positioning hole; 903, Slide groove; 904, Positioning rod; 905, Compression spring; 906, Hydraulic cylinder; 907, Mounting plate; 908, Guide rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 This utility model provides a technical solution: a TPU midsole horizontal injection molding machine with a quick mold changing structure, including a frame 1, an injection port 2 installed above the frame 1, and a mold assembly;

[0030] The mold assembly includes a fixed mold 3 and a moving mold 4. A fixed plate 5 is fixed above the frame 1. The fixed mold 3 is fixed to one side of the fixed plate 5 with screws. A movable plate 6 for mounting the moving mold 4 is provided on the side of the fixed plate 5 away from the injection port 2. The fixed mold 3 is fixed on the fixed plate 5 and remains in a fixed position. The moving mold 4 is mounted on the movable plate 6 and can move with the movable plate 6. The molding and demolding of the insole are completed by the closing and opening of the fixed mold 3 and the moving mold 4. The injection port 2 injects molten TPU raw material into the cavity of the mold assembly through the injection molding system to provide raw material for the molding of the TPU insole. A guide rail 7 for pushing the auxiliary mold assembly out or into the injection molding machine is installed on one side of the movable plate 6 and the fixed plate 5. One end of the guide rail 7 is provided with an alignment structure 8 that can quickly align with the mold changing carriage 10. A locking structure 9 that can prevent the mold changing carriage 10 from being misaligned is provided on one side of the fixed plate 5 and the movable plate 6.

[0031] The guide rail 7 includes a track 701 and a roller 702. The track 701 is fixedly connected to the fixed plate 5 and the movable plate 6 by screws. The roller 702 is rotatably connected to the track 701 via a rotating shaft. The roller 702 is mounted inside the track 701 via the rotating shaft. When the mold moves on the track 701, the roller 702 rotates around the rotating shaft, converting the sliding friction between the mold and the track 701 into rolling friction, reducing the resistance when the mold moves, and making the mold ejection or insertion smoother.

[0032] The alignment structure 8 includes a notch 801 at one end of the track 701. The notch 801 is triangular in shape. A guide frame 802 for placing the mold is installed on the top of the mold changing carriage 10. An alignment block 803 is fixed to one end of the guide frame 802. The alignment block 803 is inserted into the notch 801. A connection structure that allows the alignment block 803 to connect with the notch 801 is installed at the bottom of the alignment block 803.

[0033] The triangular notch 801 at one end of the track 701 utilizes the self-guiding property of the triangle. When the mold changing carriage 10 moves the alignment block 803 close to the notch 801, even if there is a slight deviation in the initial position of the alignment block 803, the inclined inner wall of the notch 801 will guide the alignment block 803 to gradually adjust its position, so that the alignment block 803 can be accurately inserted into the notch 801, thus achieving the initial alignment between the mold changing carriage 10 and the track 701.

[0034] The connecting structure is installed on the two sides of the guide frame 802 with insert rods 804. The inner walls on both sides of the notch 801 are provided with insertion holes 805, and the insert rods 804 are inserted into the insertion holes 805. After the alignment block 803 is inserted into the notch 801, the insert rods 804 on both sides of the guide frame 802 are inserted into the insertion holes 805 on the inner wall of the notch 801, preventing the alignment block 803 from coming out of the notch 801.

[0035] The connection structure also includes a motor 806 that drives the extension and retraction of the insertion rod 804. The output end of the motor 806 is fixed with a pressing block 807 that can press one end of the insertion rod 804. The pressing block 807 is spindle-shaped. The guide frame 802 has an annular cavity 808 and a rectangular cavity 809 communicating with the annular cavity 808. A rotating rod 810 is fixed in the annular cavity 808. One end of the rotating rod 810 is rotatably connected to the pressing block 807. One end of the insertion rod 804 is inserted into the annular cavity 808, and the other end of the insertion rod 804 is inserted into the rectangular cavity 809 and passes through the guide frame 802. A spring 811 is sleeved on the outer wall of the insertion rod 804, and a limiting plate 812 is fixed on the outer wall of the insertion rod 804. One end of the spring 811 abuts against the limiting plate 812, and the other end of the spring 811 abuts against the inner wall of the rectangular cavity 809.

[0036] The motor 806 serves as the driving source, enabling the spindle-shaped extrusion block 807 at the output end to rotate around the rotating rod 810. The rotating rod 810 provides a pivot point for the extrusion block 807. When the extrusion block 807 rotates, different diameter sections of its spindle-shaped structure will contact one end of the insertion rod 804 in the annular cavity 808. When the larger diameter section of the extrusion block 807 presses the insertion rod 804, the insertion rod 804 will overcome the elastic force of the spring 811 in the rectangular cavity 809 and move outward from the rectangular cavity 809, eventually penetrating the guide frame 802 and inserting into the insertion hole 805 of the notch 801, thus achieving the extension and locking of the insertion rod 804. When the smaller diameter section of the extrusion block 807 turns towards the insertion rod 804, the elastic force of the spring 811 pulls the insertion rod 804 towards the annular cavity 808 through the limiting plate 812, causing the insertion rod 804 to disengage from the insertion hole 805, thus achieving the retraction and unlocking of the insertion rod 804.

[0037] The limiting plate 812 is fixed to the outer wall of the insertion rod 804. On the one hand, it is used to limit the movement range of the insertion rod 804 and prevent the insertion rod 804 from coming out of the rectangular cavity 809. On the other hand, it serves as the force point of the spring 811 and transmits the elastic force of the spring 811.

[0038] The locking structure 9 includes a guard plate 901 fixed to one side of the guide frame 802. A positioning hole 902 is provided on one side of the guard plate 901. A sliding groove 903 is provided on one side of both the fixed plate 5 and the movable plate 6. A positioning rod 904 is slidably connected in the sliding groove 903. A compression spring 905 is fixed in the sliding groove 903. One end of the compression spring 905 is fixedly connected to the positioning rod 904. The positioning rod 904 is inserted into the positioning hole 902.

[0039] The guard plate 901 on one side of the guide frame 802 moves with the mold changing carriage 10. After the mold changing carriage 10 is aligned with the injection molding machine, the positioning rod 904 in the slide groove 903 of the fixed plate 5 and the moving plate 6 slides towards the guard plate 901 under the elastic force of the compression spring 905, and finally inserts into the positioning hole 902 of the guard plate 901 to prevent the mold changing carriage 10 from longitudinally misaligning during the mold changing process.

[0040] The mold assembly also includes a hydraulic cylinder 906 that provides driving force to the movable plate 6. A mounting plate 907 is fixed to the top of the frame 1. A guide rod 908 is fixed between the mounting plate 907 and the fixed plate 5. The guide rod 908 passes through the four corners of the movable plate 6 and is slidably connected to the movable plate 6 through bushings. The telescopic end of the hydraulic cylinder 906 is fixedly connected to the movable plate 6.

[0041] The extension end of the hydraulic cylinder 906 can drive the moving plate 6 to move along the guide rod 908. The moving plate 6 drives the moving mold 4 to move towards the fixed mold 3 to achieve mold closing, which facilitates the injection of TPU raw materials into the injection port 2. When the extension end of the hydraulic cylinder 906 retracts, the moving plate 6 drives the moving mold 4 away from the fixed mold 3 to achieve mold opening, which facilitates the removal of the molded TPU insole.

[0042] When in use, the structure of the injection molding machine and the body structure of the mold changing carriage 10 are the same as those of the prior art. The difference is that one end of the guide frame 802 on the mold changing carriage 10 is provided with an alignment structure 8 for connecting with the fixed plate 5 and the moving plate 6. The details will not be elaborated here.

[0043] When it is necessary to change the mold, the hydraulic cylinder 906 drives the moving plate 6 to move the moving mold 4 away from the fixed mold 3, loosens the fixing screws between the fixed mold 3 and the fixed plate 5, and releases the old mold from the equipment.

[0044] Push the mold changing carriage 10 to the side of the injection molding machine. Align the alignment block 803 at one end of the top guide frame 802 of the mold changing carriage 10 with the notch 801 on one side of the guide rail 7 of the fixed plate 5 and the moving plate 6. Utilize the self-guiding characteristic of the notch 801 to guide the alignment block 803 into the notch 801. Start the motor 806 in the connecting structure. The output end of the motor 806 drives the spindle-shaped extrusion block 807 to rotate around the rotating rod 810 in the annular cavity 808. The larger diameter part of the extrusion block 807 extrudes one end of the insertion rod 804, causing the insertion rod 804 to... The elastic force of the spring 811 inside the rectangular cavity 809 moves outward, passes through the guide frame 802, and inserts into the insertion holes 805 on both sides of the notch 801, thereby fixing the alignment block 803 to the notch 801. At the same time, the positioning hole 902 of the guard plate 901 on one side of the guide frame 802 is aligned with the positioning rod 904 in the slide groove 903 on one side of the fixed plate 5 and the moving plate 6. The compression spring 905 in the slide groove 903 pushes the positioning rod 904 into the positioning hole 902, restricting the longitudinal displacement of the mold changing carriage 10 and completing the locking of the mold changing carriage 10.

[0045] Then, the old mold is pushed and moves along the track 701 of the guide rail 7. The roller 702 inside the track 701 rotates to convert sliding friction into rolling friction, reducing the moving resistance and allowing the old mold to be smoothly removed from the injection molding machine and placed on the guide frame 802 of the mold changing cart 10.

[0046] By setting the alignment structure 8 and the locking structure 9, it can quickly dock with the external mold changing car 10, which is conducive to the rapid replacement of molds.

[0047] 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 TPU midsole horizontal injection molding machine with quick mold change structure, characterized in that: Includes a frame (1), an injection port (2) mounted on top of the frame (1), and a mold assembly; The mold assembly includes a fixed mold (3) and a moving mold (4). A fixed plate (5) is fixed above the frame (1). The fixed mold (3) is fixed to one side of the fixed plate (5) by screws. A movable plate (6) for mounting the moving mold (4) is provided on the side of the fixed plate (5) away from the injection port (2). A guide rail (7) for pushing the auxiliary mold assembly out or into the injection molding machine is installed on one side of both the movable plate (6) and the fixed plate (5). One end of the guide rail (7) is provided with an alignment structure (8) that can quickly align with the mold changing carriage (10). A locking structure (9) that can prevent the mold changing carriage (10) from being misaligned is provided on one side of the fixed plate (5) and the movable plate (6).

2. The TPU midsole horizontal injection molding machine with quick mold changing structure according to claim 1, characterized in that: The guide rail (7) includes a track (701) and a roller (702). The track (701) is fixedly connected to the fixed plate (5) and the movable plate (6) by screws. The roller (702) is rotatably connected to the track (701) by a rotating shaft.

3. A TPU midsole horizontal injection molding machine with a quick mold changing structure according to claim 2, characterized in that: The alignment structure (8) includes a notch (801) at one end of the track (701), the notch (801) being triangular in shape. The top of the mold changing carriage (10) is equipped with a guide frame (802) for placing the mold. One end of the guide frame (802) is fixed with an alignment block (803), the alignment block (803) being inserted into the notch (801). The bottom of the alignment block (803) is equipped with a connecting structure that enables the alignment block (803) to connect with the notch (801).

4. A TPU midsole horizontal injection molding machine with a quick mold changing structure according to claim 3, characterized in that: The connecting structure is installed on the insert rods (804) on both sides of the guide frame (802). The inner walls on both sides of the notch (801) are provided with insertion holes (805), and the insert rods (804) are inserted into the insertion holes (805).

5. A TPU midsole horizontal injection molding machine with a quick mold changing structure according to claim 4, characterized in that: The connection structure also includes a motor (806) for driving the extension and retraction of the insertion rod (804). The output end of the motor (806) is fixed with a compression block (807) capable of pressing one end of the insertion rod (804). The compression block (807) is spindle-shaped. The guide frame (802) has an annular cavity (808) and a rectangular cavity (809) communicating with the annular cavity (808). A rotating rod (810) is fixed inside the annular cavity (808), and one end of the rotating rod (810) is connected to the compression block. The block (807) is rotatably connected. One end of the insertion rod (804) is inserted into the annular cavity (808), and the other end of the insertion rod (804) is inserted into the rectangular cavity (809) and passes through the guide frame (802). A spring (811) is sleeved on the outer wall of the insertion rod (804), and a limiting plate (812) is fixed on the outer wall of the insertion rod (804). One end of the spring (811) abuts against the limiting plate (812), and the other end of the spring (811) abuts against the inner wall of the rectangular cavity (809).

6. A TPU midsole horizontal injection molding machine with a quick mold changing structure according to claim 5, characterized in that: The locking structure (9) includes a guard plate (901) fixed to one side of the guide frame (802). A positioning hole (902) is provided on one side of the guard plate (901). A sliding groove (903) is provided on one side of both the fixed plate (5) and the moving plate (6). A positioning rod (904) is slidably connected in the sliding groove (903). A compression spring (905) is fixed in the sliding groove (903). One end of the compression spring (905) is fixedly connected to the positioning rod (904). The positioning rod (904) is inserted into the positioning hole (902).

7. A TPU midsole horizontal injection molding machine with a quick mold changing structure according to claim 1, characterized in that: The mold assembly also includes a hydraulic cylinder (906) that provides driving force to the moving plate (6). A mounting plate (907) is fixed to the top of the frame (1). A guide rod (908) is fixed between the mounting plate (907) and the fixed plate (5). The guide rod (908) passes through the four corners of the moving plate (6) and is slidably connected to the moving plate (6) through a bushing. The telescopic end of the hydraulic cylinder (906) is fixedly connected to the moving plate (6).

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