Injection molding nozzle for an injection molding mold

Abstract

The utility model relates to injection mould technical field, concretely is a kind of injection mould injection mould nozzle, including injection mould nozzle and sprue bush, the positioning mechanism for the positioning of sprue bush and the locking mechanism of pouring through bush fixed are equipped in injection mould nozzle, two groups of symmetrical distribution's snap ring are fixedly installed on sprue bush, and the clamping groove of being opened in the two sides of sprue bush two groups of symmetrical distribution;Positioning mechanism includes the mounting ring of rotation installation in injection mould nozzle and multiple groups of annular distribution's clamping plate, tooth ring is sleeved on mounting ring, and multiple clamping plates are all rotationally connected with injection mould nozzle by mounting shaft. Through the independent snap ring and clamping groove structure of sprue bush, cooperate the positioning mechanism and locking mechanism in injection mould nozzle, reliable connection with injection mould nozzle body is realized, when needing to replace sprue bush, just need to operate first handle and third handle, old sprue bush can be easily taken out, and new sprue bush is installed, solve the problem that traditional integral type or interference fit structure replacement is extremely difficult.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection nozzle for injection molds. Background Technology

[0002] In the field of plastic injection molding, injection molds are core equipment, and injection nozzles, as key components connecting injection molding machine nozzles and mold cavities, directly affect the conveying efficiency of molten plastic, molding quality, and mold life. Sprue bushings (also known as main runner bushings or sprue bushings), as one of the core components of injection nozzles, directly withstand the scouring and wear of high-temperature, high-pressure molten plastic and frequently come into contact with injection molding machine nozzles, making them critical parts in molds that are extremely prone to wear.

[0003] In existing technologies, the sprue bushing and the injection nozzle body are designed as one piece, or are tightly fixed by means of interference fit, strong pressing, etc. This method has a simple structure and good sealing performance, but once the sprue bushing is worn, deformed, blocked, or needs to be changed to different specifications according to the product, the replacement is extremely difficult. It often requires the entire injection nozzle to be removed from the mold. The replacement process is time-consuming, labor-intensive, and can easily damage other parts of the mold, resulting in a significant increase in production downtime and seriously affecting production efficiency. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an injection nozzle for injection molds, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an injection nozzle for an injection mold, comprising an injection nozzle and a sprue sleeve, wherein the injection nozzle is provided with a positioning mechanism for positioning the sprue sleeve and a locking mechanism for fixing the sprue sleeve, and two sets of symmetrically distributed retaining rings are fixedly installed on the sprue sleeve, as well as two sets of symmetrically distributed retaining grooves opened on both sides of the sprue sleeve.

[0008] The positioning mechanism includes a mounting ring rotatably installed inside the injection nozzle and multiple sets of annularly distributed clamping plates. A toothed ring is sleeved on the mounting ring. The multiple sets of clamping plates are rotatably connected to the injection nozzle via a mounting shaft. A fourth gear is sleeved on the mounting shaft, and the multiple sets of fourth gears are meshed with the toothed rings. The multiple sets of clamping plates are correspondingly arranged with the clamping rings, and the multiple sets of clamping plates can be clamped between two sets of clamping rings. A first handle is rotatably installed inside the injection nozzle, and the first handle is perpendicular to the upper mounting shaft. A first bevel gear is sleeved on the first handle, and a second bevel gear is sleeved on the upper mounting shaft. The second bevel gear is meshed with the first bevel gear.

[0009] Preferably, the first handle is fitted with two sets of symmetrically distributed ratchet wheels, and the injection nozzle is provided with two sets of symmetrically distributed pawls. The two sets of pawls are respectively engaged with the corresponding ratchet wheels. The two sets of pawls are rotatably connected to the injection nozzle through a rotating rod. A first torsion spring is fitted on the rotating rod, and the two ends of the first torsion spring are respectively fixedly connected to the pawls and the injection nozzle. A first gear is fitted on each of the two sets of rotating rods. Two sets of first racks are slidably installed in the injection nozzle, and the two sets of first racks are respectively engaged with the corresponding first gears.

[0010] Preferably, a connecting frame is slidably installed inside the injection nozzle, and the connecting frame is fixedly connected to two sets of first racks respectively. Two sets of symmetrically distributed slide rods are fixedly installed inside the injection nozzle. The moving frame is slidably sleeved with the slide rods. Two sets of symmetrically distributed first springs are sleeved on the slide rods, and the two ends of the two sets of first springs are fixedly connected to the corresponding moving frame and the injection nozzle respectively. A positioning block is fixedly installed on the connecting frame, and two sets of symmetrically distributed positioning frames are slidably installed inside the injection nozzle.

[0011] Preferably, each of the two sets of positioning frames is fixedly equipped with a positioning rod, and the two sets of positioning rods are respectively movably engaged with the positioning block. Each of the two sets of positioning rods is fitted with a second spring, and the two ends of the second spring are respectively fixedly connected to the positioning rod and the injection nozzle. Each of the two sets of positioning frames is fixedly equipped with a second rack, and a second gear is provided between the two sets of second racks. The second gear is rotatably connected to the injection nozzle through a second handle. A second torsion spring is fitted on the second handle, and the two ends of the second torsion spring are respectively fixedly connected to the second gear and the injection nozzle.

[0012] Preferably, the locking mechanism includes two symmetrically distributed brackets that are slidably installed inside the injection nozzle. Each bracket has a locking rod fixedly installed on it. The two locking rods are correspondingly arranged with the locking slots. The two locking rods are movably engaged with the sprue sleeve through the locking slots. Each bracket has a third rack fixedly installed on it. A third gear is provided between the two sets of third racks. The third gear is rotatably connected to the injection nozzle through a third handle. Two sets of fixing rods corresponding to the third racks are fixedly installed inside the injection nozzle.

[0013] Preferably, a third spring is sleeved on the card holder, and the two ends of the third spring are fixedly connected to the card rod and the injection nozzle, respectively. A third torsion spring is sleeved on the third handle, and the two ends of the third torsion spring are fixedly connected to the third gear and the injection nozzle, respectively.

[0014] Preferably, the two sets of third racks are slidably sleeved with corresponding fixed rods, and two sets of symmetrically distributed fourth springs are sleeved on the fixed rods. The two ends of the two sets of fourth springs are fixedly connected to the third racks and the injection nozzle, respectively.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides an injection nozzle for an injection mold, which has the following beneficial effects:

[0017] The sprue bushing, through its independent retaining ring and groove structure, works in conjunction with the positioning mechanism (the retaining plate engages with the retaining ring) and locking mechanism (the retaining rod engages with the groove) inside the injection nozzle to achieve a reliable connection with the injection nozzle body. When the sprue bushing needs to be replaced, simply operate the first handle (release positioning) and the third handle (release locking) to easily remove the old sprue bushing and install the new one. This solves the problem of the extreme difficulty in replacing traditional one-piece or interference fit structures. The replacement process does not require removing the entire injection nozzle from the mold; the operation can be quickly completed on the injection nozzle body, significantly reducing production downtime caused by sprue bushing issues. It avoids the heavy physical labor and complex operations required to disassemble the entire injection nozzle in the traditional way, and eliminates the need for methods that may damage the mold, such as forceful pressing or hammering, during installation or disassembly. This greatly reduces the labor intensity and safety risks for operators, effectively protects the mold, and extends its service life. Furthermore, it allows for easy replacement of different specifications of sprue bushings according to product requirements (such as different materials and different gate sizes), improving the versatility and adaptability of the mold. Worn or damaged sprue bushings can be replaced individually, resulting in lower maintenance costs. The positioning mechanism (plate + ring) and locking mechanism (bar + slot) provide double fixation, ensuring the stability and sealing of the sprue bushing during operation. The ratchet and pawl mechanism in the positioning mechanism prevents the first handle from accidentally reversing and causing the positioning to loosen. Various torsion springs and springs (first torsion spring, second torsion spring, third torsion spring, first spring, second spring, third spring, fourth spring) provide reset force and holding force, ensuring that the mechanism moves in place and remains in its position. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of a partially disassembled structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the positioning mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the card plate of this utility model;

[0023] Figure 5 This utility model Figure 4 Enlarged schematic diagram of the structure at point A in the diagram;

[0024] Figure 6 This is a schematic diagram of the locking mechanism of this utility model.

[0025] In the diagram: 1. Injection nozzle; 2. Sprue bushing; 3. Snap ring; 4. Snap groove; 5. Positioning mechanism; 501. Mounting ring; 502. Gear ring; 503. Clamping plate; 504. Mounting shaft; 505. Gear; 506. First handle; 507. Ratchet; 508. Pawl; 509. Rotating rod; 510. First torsion spring; 511. First gear; 512. First rack; 513. Connecting frame; 514. Slide rod; 515. First spring; 516. Positioning block; 517. 518. First bevel gear; 519. Second bevel gear; 520. Positioning frame; 521. Positioning rod; 522. Second spring; 523. Second rack; 524. Second gear; 525. Second torsion spring; 6. Locking mechanism; 601. Card holder; 602. Card rod; 603. Third spring; 604. Third rack; 605. Third gear; 606. Third handle; 607. Third torsion spring; 608. Fixing rod; 609. Fourth spring. Detailed Implementation

[0026] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0027] Figures 1-6In one embodiment of this utility model, an injection nozzle for an injection mold includes an injection nozzle 1 and a sprue sleeve 2. The injection nozzle 1 is provided with a positioning mechanism 5 for positioning the sprue sleeve 2 and a locking mechanism 6 for fixing the sprue sleeve. Two sets of symmetrically distributed retaining rings 3 are fixedly installed on the sprue sleeve 2, and two sets of symmetrically distributed retaining grooves 4 are opened on both sides of the sprue sleeve 2. The positioning mechanism 5 includes an installation ring 501 rotatably installed in the injection nozzle 1 and multiple sets of annularly distributed retaining plates 503. A toothed ring is sleeved on the installation ring 501. 502. Multiple sets of clamping plates 503 are rotatably connected to the injection nozzle 1 via mounting shaft 504. A fourth gear 505 is sleeved on the mounting shaft 504, and multiple sets of fourth gears 505 are meshed with gear rings 502. Multiple sets of clamping plates 503 are correspondingly arranged with retaining rings 3, and multiple sets of clamping plates 503 can be clamped between two sets of retaining rings 3. A first handle 506 is rotatably installed inside the injection nozzle 1, and the first handle 506 is perpendicular to the upper mounting shaft 504. A first bevel gear 517 is sleeved on the first handle 506. A second bevel gear 518 is fitted onto the upper mounting shaft 504. The second bevel gear 518 meshes with the first bevel gear 517. The sprue sleeve 2, through an independent retaining ring 3 and retaining groove 4 structure, works in conjunction with the positioning mechanism 5 and locking mechanism 6 inside the injection nozzle 1 to achieve a reliable connection with the injection nozzle 1 body. When the sprue sleeve 2 needs to be replaced, the old sprue sleeve 2 can be easily removed and the new sprue sleeve 2 installed simply by operating the first handle 506 and the third handle 606. This solves the problem of the extreme difficulty in replacing traditional one-piece or interference fit structures. The replacement process does not require removing the entire injection nozzle 1 from the mold. The operation can be completed quickly on the injection nozzle 1 body, significantly reducing production downtime caused by sprue sleeve 2 issues. It avoids the heavy physical labor and complex operations required to disassemble the entire injection nozzle 1 in the traditional way. There is no need to use methods that may damage the mold, such as forceful pressing or knocking, for installation or disassembly. This greatly reduces the labor intensity and safety risks for operators, effectively protects the mold, and extends its service life.

[0028] In this embodiment, reference Figure 3 , Figure 4 , Figure 5As shown, two sets of symmetrically distributed ratchet wheels 507 are sleeved on the first handle 506. Two sets of symmetrically distributed pawls 508 are provided inside the injection nozzle 1. Each set of pawls 508 is engaged with a corresponding ratchet wheel 507. Both sets of pawls 508 are rotatably connected to the injection nozzle 1 via a rotating rod 509. A first torsion spring 510 is sleeved on the rotating rod 509, with both ends of the first torsion spring 510 fixedly connected to the pawls 508 and the injection nozzle 1, respectively. A first gear 511 is sleeved on each set of rotating rods 509. Two sets of first racks 512 are slidably installed inside the injection nozzle 1, each set of first racks 512 engaging with a corresponding first gear 511. A connecting frame 513 is slidably installed inside the injection nozzle 1, and the connecting frame 513 is fixedly connected to each set of first racks 512. Two sets of symmetrically distributed slide rods 514 are fixedly installed inside the injection nozzle 1. The movable frame is slidably sleeved with the slide rods 514. Two sets of symmetrically distributed first springs 515 are sleeved on the slide rods 514, and the two ends of the two sets of first springs 515 are respectively fixedly connected to the corresponding movable frame and the injection nozzle 1. A positioning block 516 is fixedly installed on the connecting frame 513. Two sets of symmetrically distributed positioning frames 519 are slidably installed inside the injection nozzle 1. A positioning rod 520 is fixedly installed on each of the two sets of positioning frames 519, and the two sets of positioning rods 520 are respectively movably engaged with the positioning block 516. A second spring 521 is sleeved on each of the two sets of positioning rods 520, and the two ends of the second spring 521 are respectively fixedly connected to the positioning rod 520 and the injection nozzle 1. A second spring 521 is fixedly installed on each of the two sets of positioning frames 519. A rack 522 is provided, and a second gear 523 is provided between the two sets of second racks 522. The second gear 523 is rotatably connected to the injection nozzle 1 through a second handle 524. A second torsion spring 525 is sleeved on the second handle 524. The two ends of the second torsion spring 525 are fixedly connected to the second gear 523 and the injection nozzle 1, respectively. Rotating the second handle 524 drives the second gear 523 to rotate, which, in conjunction with the two sets of second racks 522, causes the two sets of positioning frames 519 to drive the two sets of positioning rods 520 to slide in opposite directions. Manually pulling the connecting frame 513 causes the two sets of first racks 512 to slide, which, in conjunction with the first gear 511, causes the rotating rod 509 to drive the two sets of pawls 508 to deflect away from the ratchet 507 that was originally meshed with it, moving the positioning block 516 on the connecting frame 513 to the two sets of positioning rods 508. Between the positioning rods 520, the second handle 524 is released. Under the action of the second spring 521 and the second torsion spring 525, the two sets of positioning rods 520 slide inward synchronously and engage with the positioning block 516. This fixes the position of the connecting frame 513 and the angle of the rotating rod 509 and the pawl 508, making it convenient for the operator to rotate the first handle 506. The rotation is transmitted to the upper mounting shaft 504 through the meshing first bevel gear 517 and second bevel gear 518. The mounting shaft 504 drives the fourth gear 505 on it to rotate, which in turn drives the meshing gear ring 502 to rotate. The gear ring 502, in conjunction with the multiple ring-shaped retaining plates 503, rotates synchronously around the mounting shaft 504. The retaining plates 503 cut into the gap between the two sets of retaining rings 3 on the sprue sleeve 2, achieving radial positioning of the sprue sleeve 2.At this time, the ratchet 507-pawl 508 mechanism engages with the ratchet 507 on the first handle 506 and the pawl 508 inside the injection nozzle 1 to lock the mounting shaft 504, preventing reverse rotation and loosening.

[0029] In this embodiment, reference Figure 6 As shown, the locking mechanism 6 includes two symmetrically distributed brackets 601 slidably installed inside the injection nozzle 1. Each bracket 601 has a fixedly mounted locking rod 602, which corresponds to a slot 4. The two locking rods 602 are movably engaged with the sprue sleeve 2 via the slot 4. Each bracket 601 has a fixedly mounted third rack 604, and a third gear 605 is provided between the two sets of third racks 604. The third gear 605 is rotatably connected to the injection nozzle 1 via a third handle 606. Two fixed rods 608, corresponding to the third racks 604, are fixedly installed inside the injection nozzle 1. A third spring 603 is sleeved on the bracket 601, with both ends of the third spring 603 fixedly connected to the locking rod 602 and the injection nozzle 1, respectively. A third torsion spring 607 is sleeved on the third handle 606. Both ends of the handle 606 are fixedly connected to the third gear 605 and the injection nozzle 1, respectively. The two sets of third racks 604 are slidably sleeved with the corresponding fixed rods 608. Two sets of symmetrically distributed fourth springs 609 are sleeved on the fixed rods 608. The two ends of the two sets of fourth springs 609 are fixedly connected to the third racks 604 and the injection nozzle 1, respectively. Rotating the third handle 606 drives the third gear 605 to rotate, which drives the third racks 604 on both sides to slide axially along the fixed rods 608. The third racks 604 push the bracket 601 and the locking rod 602 to move towards the center, so that the locking rod 602 is embedded in the slot 4 on the side of the sprue sleeve 2, thus completing the axial locking. The third spring 603 provides a pre-tight locking force for the locking rod 602. The fourth spring 609 ensures that the third rack 604 resets smoothly. The third torsion spring 607 makes the third handle 606 automatically return to its original position.

[0030] In this embodiment, rotating the second handle 524 drives the second gear 523 to rotate. This, in conjunction with the two sets of second racks 522, causes the two sets of positioning frames 519 to slide in opposite directions along the two sets of positioning rods 520. Manually pulling the connecting frame 513 causes the two sets of first racks 512 to slide. This, in conjunction with the first gear 511, causes the rotating rod 509 to deflect the two sets of pawls 508 away from the ratchet 507 that was originally engaged with it. This moves the positioning block 516 on the connecting frame 513 between the two sets of positioning rods 520. Releasing the second handle 524 causes the two sets of positioning rods 520 to slide inward synchronously under the action of the second spring 521 and the second torsion spring 525, engaging with the positioning block 516. This fixes the position of the connecting frame 513 and the angles of the rotating rod 509 and the pawls 508, facilitating the operator's rotation of the first handle 506. The rotation is transmitted to the upper mounting shaft 504 through the meshing first bevel gear 517 and second bevel gear 518, which in turn drives the upper... The fourth gear 505 rotates, driving the meshing gear ring 502 to rotate. The gear ring 502, in conjunction with multiple ring-shaped retaining plates 503, rotates synchronously around the mounting shaft 504. The retaining plates 503 cut into the gap between the two sets of retaining rings 3 on the sprue sleeve 2, achieving radial positioning of the sprue sleeve 2. At this time, the ratchet 507-pawl 508 mechanism engages with the ratchet 507 on the first handle 506 and the pawl 508 inside the injection nozzle 1 to lock the mounting shaft 504, preventing reverse rotation and loosening. The third gear rotates... The handle 606 drives the third gear 605 to rotate, which in turn drives the third racks 604 on both sides to slide axially along the fixed rod 608. The third racks 604 push the bracket 601 and the locking rod 602 to move towards the center, so that the locking rod 602 is embedded in the slot 4 on the side of the sprue sleeve 2, thus completing the axial locking. The third spring 603 provides a pre-tightening locking force for the locking rod 602. The fourth spring 609 ensures that the third rack 604 resets smoothly. The third torsion spring 607 causes the third handle 606 to automatically return to its original position.

[0031] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0032] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] 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. An injection molding nozzle for an injection molding mold, comprising an injection molding nozzle (1) and a gate bushing (2), characterized in that: The injection nozzle (1) is provided with a positioning mechanism (5) for positioning the sprue sleeve (2) and a locking mechanism (6) for fixing the sprue sleeve. Two sets of symmetrically distributed retaining rings (3) are fixedly installed on the sprue sleeve (2), and two sets of symmetrically distributed retaining grooves (4) are opened on both sides of the sprue sleeve (2). The positioning mechanism (5) includes a mounting ring (501) rotatably mounted inside the injection nozzle (1) and multiple sets of annularly distributed clamping plates (503). A toothed ring (502) is sleeved on the mounting ring (501). The multiple sets of clamping plates (503) are rotatably connected to the injection nozzle (1) through a mounting shaft (504). A fourth gear (505) is sleeved on the mounting shaft (504), and the multiple sets of fourth gears (505) are meshed with the toothed ring (502). The multiple sets of clamping plates (503) Corresponding to the retaining ring (3), multiple sets of retaining plates (503) can be snapped between two sets of retaining rings (3). A first handle (506) is rotatably installed inside the injection nozzle (1), and the first handle (506) is perpendicular to the upper mounting shaft (504). A first bevel gear (517) is sleeved on the first handle (506), and a second bevel gear (518) is sleeved on the upper mounting shaft (504). The second bevel gear (518) meshes with the first bevel gear (517).

2. An injection molding nozzle for an injection molding mold according to claim 1, characterized in that: Two sets of symmetrically distributed ratchet wheels (507) are sleeved on the first handle (506). Two sets of symmetrically distributed pawls (508) are provided in the injection nozzle (1). The two sets of pawls (508) are respectively engaged with the corresponding ratchet wheels (507). The two sets of pawls (508) are rotatably connected to the injection nozzle (1) through the rotating rod (509). A first torsion spring (510) is sleeved on the rotating rod (509). The two ends of the first torsion spring (510) are fixedly connected to the pawls (508) and the injection nozzle (1) respectively. A first gear (511) is sleeved on both sets of rotating rods (509). Two sets of first racks (512) are slidably installed in the injection nozzle (1). The two sets of first racks (512) are respectively engaged with the corresponding first gears (511).

3. An injection molding nozzle for an injection molding mold according to claim 1, characterized in that: A connecting frame (513) is slidably installed inside the injection nozzle (1), and the connecting frame (513) is fixedly connected to two sets of first racks (512) respectively. Two sets of symmetrically distributed slide rods (514) are fixedly installed inside the injection nozzle (1). The moving frame is slidably sleeved with the slide rods (514). Two sets of symmetrically distributed first springs (515) are sleeved on the slide rods (514), and the two ends of the two sets of first springs (515) are fixedly connected to the corresponding moving frame and the injection nozzle (1) respectively. A positioning block (516) is fixedly installed on the connecting frame (513). Two sets of symmetrically distributed positioning frames (519) are slidably installed inside the injection nozzle (1).

4. An injection molding nozzle for an injection molding mold according to claim 3, characterized in that: Positioning rods (520) are fixedly installed on both sets of positioning frames (519), and the two sets of positioning rods (520) are movably engaged with positioning blocks (516) respectively. A second spring (521) is sleeved on both sets of positioning rods (520). The two ends of the second spring (521) are fixedly connected to the positioning rod (520) and the injection nozzle (1) respectively. A second rack (522) is fixedly installed on both sets of positioning frames (519). A second gear (523) is provided between the two sets of second racks (522), and the second gear (523) is rotatably connected to the injection nozzle (1) through a second handle (524). A second torsion spring (525) is sleeved on the second handle (524), and the two ends of the second torsion spring (525) are fixedly connected to the second gear (523) and the injection nozzle (1) respectively.

5. An injection molding nozzle according to claim 1 wherein: The locking mechanism (6) includes two sets of symmetrically distributed card holders (601) that are slidably installed in the injection nozzle (1). Each set of card holders (601) is fixedly installed with a card rod (602). The two sets of card rods (602) are correspondingly set with the card slot (4). The two sets of card rods (602) are movably engaged with the sprue sleeve (2) through the card slot (4). Each set of card holders (601) is fixedly installed with a third rack (604). A third gear (605) is provided between the two sets of third racks (604). The third gear (605) is rotatably connected to the injection nozzle (1) through a third handle (606). Two sets of fixing rods (608) corresponding to the third racks (604) are fixedly installed in the injection nozzle (1).

6. An injection molding nozzle for an injection molding mold according to claim 5, characterized in that: A third spring (603) is sleeved on the card holder (601). The two ends of the third spring (603) are fixedly connected to the card rod (602) and the injection nozzle (1) respectively. A third torsion spring (607) is sleeved on the third handle (606). The two ends of the third torsion spring (607) are fixedly connected to the third gear (605) and the injection nozzle (1) respectively.

7. The injection nozzle of an injection mold according to claim 5, characterized in that: The two sets of third racks (604) are slidably sleeved with the corresponding fixed rods (608). Two sets of symmetrically distributed fourth springs (609) are sleeved on the fixed rods (608). The two ends of the two sets of fourth springs (609) are fixedly connected to the third racks (604) and the injection nozzle (1) respectively.

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