Injection table moving device and injection molding machine

Abstract

The utility model discloses an injection table moving device and an injection molding machine, and relates to the technical field of injection molding equipment. The injection table moving device comprises two transmission assemblies which are symmetrically arranged on the two opposite sides of the injection table base. Each transmission assembly is connected with the die locking head plate through a connecting assembly; the power assembly is used for driving the transmission assembly, so that the transmission assembly drives the injection table seat to move in the direction close to the mold locking head plate; wherein the transmission assembly comprises a screw rod; the connecting assembly comprises a connecting sleeve, a connecting rod and a connecting seat which are connected in sequence, one end of the connecting sleeve is rotationally connected with the lead screw, and the other end of the connecting sleeve is in threaded connection with the connecting rod; and a limiting structure is arranged between the connecting rod and the connecting seat. According to the technical scheme provided by the utility model, the technical problems that the mold locking head plate is inclined and the nozzle leaks glue due to the adoption of a single-screw injection moving structure can be solved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to a moving injection stage device and an injection molding machine. Background Technology

[0002] During normal operation of the injection molding machine, the injection station moving device is used to move the injection station base, which is equipped with the molten plastic cylinder, closer to the mold so that the nozzle of the molten plastic cylinder is tightly engaged with the sprue bushing of the mold, so that the subsequent screw can inject the molten plastic material in the molten plastic cylinder into the mold cavity. When the molten plastic material is injected into the mold from the nozzle, the extrusion force between the molten plastic material and the mold will generate a reverse thrust. This reverse thrust will cause the injection station base to move away from the mold. At this time, the injection station moving device is required to provide sufficient nozzle contact force to prevent the injection station base from moving away from the mold and to ensure that the nozzle of the molten plastic cylinder and the sprue bushing of the mold always remain tightly engaged.

[0003] In existing technologies, injection unit moving devices typically employ a single-screw injection structure, where the screw drive assembly is located at the bottom of the injection unit base, with one end connected to the mold clamping head plate of the mold clamping mechanism. During actual operation of the injection molding machine, this single-screw injection structure causes the mold clamping head plate to bear an additional and unbalanced force, resulting in mold clamping head plate tilting and consequently reducing the precision of the produced products. Furthermore, the reverse thrust during the injection process forces the injection unit base to retract, while the screw drive assembly at the bottom of the injection unit base pulls the injection unit base to prevent retraction. This push-pull force creates an oblique force at the contact point between the nozzle of the molten plastic cylinder and the sprue bushing, causing the nozzle position to tilt and resulting in nozzle leakage.

[0004] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content

[0005] The main purpose of this utility model is to propose a jetting platform moving device and an injection molding machine, which aims to solve the technical problems of mold head plate tilting and nozzle leakage caused by the use of a single screw injection moving structure.

[0006] To achieve the above objectives, this utility model proposes a injection stage moving device for use in an injection molding machine, wherein the injection molding machine includes an injection stage base and a mold clamping head plate;

[0007] Specifically, the firing platform moving device includes:

[0008] Two sets of transmission components are symmetrically arranged on opposite sides of the injection unit; each set of transmission components is connected to the mold clamping head plate via a connecting component.

[0009] A power assembly for driving the transmission assembly, so that the transmission assembly drives the injection station to move toward the clamping head plate;

[0010] The transmission assembly includes a lead screw; the connection assembly includes a connecting sleeve, a connecting rod, and a connecting seat connected in sequence, one end of the connecting sleeve is rotatably connected to the lead screw, and the other end of the connecting sleeve is threadedly connected to the connecting rod; the connecting rod can move axially relative to the connecting seat, and a limiting structure is provided between the connecting rod and the connecting seat, the limiting structure being used to limit the circumferential movement of the connecting rod relative to the connecting seat.

[0011] In one embodiment, a bearing seat is provided on the side of the injection stage, and the middle part of the lead screw is supported in the bearing seat; wherein a lead screw nut is fixedly connected inside the bearing seat, and the lead screw nut is threadedly connected to the lead screw.

[0012] In one embodiment, the connecting seat is fixedly connected to the locking head plate. The connecting seat has an inner cavity. The end of the connecting rod away from the connecting sleeve extends through the through hole of the connecting seat into the inner cavity. The end of the connecting rod away from the connecting sleeve is provided with a limiting ring, which abuts against the through hole. A spring is sleeved on the connecting rod, and both ends of the spring abut against the connecting seat and the limiting ring, respectively.

[0013] In one embodiment, the limiting structure includes a keyway and a flat key; the keyway is disposed in the through hole of the connector, and the groove of the keyway extends along the axial direction of the connecting rod; the flat key is disposed on the side of the connecting rod, and the flat key is slidably connected in the keyway.

[0014] In one embodiment, the other end of the connecting sleeve is provided with an internal thread, and the end of the connecting rod near the connecting sleeve is provided with an external thread, wherein the external thread and the internal thread are threadedly engaged.

[0015] In one embodiment, at least two limiting nuts are threaded onto the connecting rod, and the limiting nuts are used to abut against the other end of the connecting sleeve.

[0016] In one embodiment, the connecting rod is provided with a sensing block, and the connecting seat is provided with a detection switch via a bracket, the detection switch being electrically connected to the power component;

[0017] In one embodiment, a plurality of detection switches are provided, and any two detection switches have a distance difference along the axial direction of the connecting rod.

[0018] In one embodiment, the two sets of transmission components are interconnected by a linkage component, and the power component is connected to the transmission component on one side of it; the power component is used to drive the transmission component on one side to move, and the transmission component on the other side moves synchronously under the action of the linkage component.

[0019] In one embodiment, the power assembly includes a rotary motor connected to the end of the lead screw of the transmission assembly on one side of the assembly, away from the connecting sleeve, via a coupling.

[0020] In one embodiment, the linkage assembly includes a driving wheel, a driven wheel, and a transmission belt. The driving wheel is fixedly mounted on the lead screw of the transmission assembly on one side, and the driven wheel is fixedly mounted on the lead screw of the transmission assembly on the other side. The driving wheel and the driven wheel are connected by the transmission belt.

[0021] In one embodiment, the linkage assembly further includes several idler pulleys and auxiliary pulleys. The idler pulleys are used to adjust the tension of the transmission belt, and the auxiliary pulleys are used to change the transmission direction of the transmission belt so that the transmission belt can bypass the injection station and connect with the driving pulley and the driven pulley.

[0022] To achieve the above objectives, this utility model proposes an injection molding machine, which includes the injection stage moving device described in any of the above claims.

[0023] The technical solution of this utility model involves symmetrically arranging two sets of transmission components on opposite sides of the injection unit, with each set of transmission components connected to the mold clamping head plate via a connecting component. A power component then drives the transmission components, enabling them to move the injection unit closer to the mold clamping head plate, thereby achieving injection molding of the mold. Unlike existing injection unit moving devices that use a single-screw injection structure, the injection unit moving device in this application uses symmetrically arranged transmission components on both sides to cooperate in driving the injection unit to move. This ensures balanced lateral forces on the injection unit during movement, thus avoiding the technical problems of mold clamping head plate tilting and nozzle leakage caused by the single-screw injection structure.

[0024] In addition, the transmission assembly includes a lead screw, which drives the injection unit to move using a lead screw transmission structure. The structure is simple and highly practical. The connecting assembly includes a connecting sleeve, a connecting rod, and a connecting seat connected in sequence. One end of the connecting sleeve is rotatably connected to the lead screw, ensuring that the connecting sleeve does not rotate with the lead screw during rotational transmission. The other end of the connecting sleeve is threadedly connected to the connecting rod. By adjusting the length of the threaded connection between the two, the overall length of the connecting sleeve and the connecting rod, i.e., the overall length of the connecting assembly, is adjusted. This displacement adjustment ensures that the two transmission assemblies are symmetrically arranged, guaranteeing that they can cooperate to drive the injection unit towards the mold with balanced lateral forces. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of one embodiment of the firing platform moving device provided by this utility model;

[0027] Figure 2 A second structural schematic diagram of an embodiment of the firing platform moving device provided by this utility model;

[0028] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0029] Figure 4 A schematic diagram of the internal structure of an embodiment of the firing platform moving device provided by this utility model;

[0030] Figure 5 for Figure 4 A magnified view of a section at point B.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Injection stand; 110. Bearing housing; 111. Lead screw nut; 200. Mold locking head plate; 300. Transmission assembly; 310. Lead screw; 400. Linkage assembly; 410. Drive wheel; 420. Driven wheel; 430. Transmission belt; 440. Idler wheel; 450. Auxiliary wheel; 500. Connecting assembly; 510. Connecting sleeve; 520. Connecting rod; 521. Limiting ring; 522. Flat key; 523. Sensing block; 530. Connecting seat; 531. Seat cavity; 532. Through hole; 533. Keyway; 534. Detection switch; 540. Spring component; 550. Limiting nut; 600. Power assembly; 610. Rotary motor; 620. Coupling;

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0035] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0037] In existing technologies, injection unit moving devices typically employ a single-screw injection structure, where the screw drive assembly is located at the bottom of the injection unit base, with one end connected to the mold clamping head plate of the mold clamping mechanism. During actual operation of the injection molding machine, this single-screw injection structure causes the mold clamping head plate to bear an additional and unbalanced force, resulting in mold clamping head plate tilting and consequently reducing the precision of the produced products. Furthermore, the reverse thrust during the injection process forces the injection unit base to retract, while the screw drive assembly at the bottom of the injection unit base pulls the injection unit base to prevent retraction. This push-pull force creates an oblique force at the contact point between the nozzle of the molten plastic cylinder and the sprue bushing, causing the nozzle position to tilt and resulting in nozzle leakage.

[0038] To solve the above-mentioned technical problems, this utility model proposes a firing platform moving device.

[0039] Reference Appendix Figure 1-5 The injection stage moving device is used in an injection molding machine, wherein the injection molding machine includes an injection stage base 100 and a mold clamping head plate 200;

[0040] Specifically, the firing platform moving device includes:

[0041] Two sets of transmission components 300 are symmetrically arranged on opposite sides of the injection station 100; each set of transmission components 300 is connected to the mold clamping head plate 200 through a connecting component 500.

[0042] The power assembly 600 is used to drive the transmission assembly 300 so that the transmission assembly 300 drives the injection station 100 to move closer to the mold clamping head plate 200 so that the melt cylinder installed on the injection station 100 can be connected to the mold installed on the mold clamping head plate 200.

[0043] The transmission assembly 300 includes a lead screw 310; the connection assembly 500 includes a connecting sleeve 510, a connecting rod 520, and a connecting seat 530 connected in sequence. One end of the connecting sleeve 510 is rotatably connected to the lead screw 310, and the other end of the connecting sleeve 510 is threadedly connected to the connecting rod 520. The connecting rod 520 can move axially relative to the connecting seat 530, and a limiting structure is provided between the connecting rod 520 and the connecting seat 530 to limit the circumferential movement of the connecting rod 520 relative to the connecting seat 530.

[0044] The technical solution of this utility model involves symmetrically arranging two sets of transmission components 300 on opposite sides of the injection unit 100, with each set of transmission components 300 connected to the mold clamping head plate 200 via a connecting component 500. A power component 600 then drives the transmission components 300, enabling them to move the injection unit 100 closer to the mold clamping head plate 200, thereby achieving injection molding of the mold. Unlike existing injection unit moving devices that use a single lead screw 310 injection structure, the injection unit moving device in this application uses symmetrically arranged transmission components 300 on both sides to cooperate in driving the injection unit 100 to move. This ensures that the injection unit 100 experiences balanced forces on both sides during movement, thus avoiding the technical problems of mold clamping head plate 200 tilting and nozzle leakage caused by the single lead screw 310 injection structure.

[0045] Furthermore, the transmission assembly 300 includes a lead screw 310, which drives the injection stage 100 to move using a lead screw transmission structure. This structure is simple and highly practical. The connecting assembly 500 includes a connecting sleeve 510, a connecting rod 520, and a connecting seat 530 connected in sequence. One end of the connecting sleeve 510 is rotatably connected to the lead screw 310, ensuring that the connecting sleeve 510 does not rotate with the lead screw 310 during rotational transmission. The other end of the connecting sleeve 510 is threadedly connected to the connecting rod 520. By adjusting the threaded connection length, the overall length of the connecting sleeve 510 and the connecting rod 520, i.e., the overall length of the connecting assembly 500, is adjusted. This displacement adjustment ensures that the two transmission assemblies 300 are symmetrically arranged, guaranteeing that they can cooperate to drive the injection stage 100 towards the mold in a balanced manner.

[0046] Specifically, see the attached document. Figure 4 The side of the injection unit 100 is provided with a bearing seat 110, and the middle part of the lead screw 310 is supported in the bearing seat 110. A lead screw nut 111 is fixedly connected inside the bearing seat 110, and the lead screw nut 111 is threadedly connected to the lead screw 310. This arrangement supports the lead screw 310 through the bearing seat 110, ensuring that the lead screw 310 can rotate smoothly. Simultaneously, the fixed connection of the lead screw nut 111 inside the bearing seat 110 forms a lead screw transmission structure with the lead screw nut 111 and the lead screw 310. Therefore, when the power assembly 600 drives the lead screw 310 to rotate, the injection unit 100 can move closer to or further away from the mold clamping head plate 200, thereby achieving the purpose of driving the injection unit 100 to move.

[0047] Specifically, see the attached document. Figure 5The limiting structure includes a keyway 533 and a flat key 522. The keyway 533 is disposed in the through hole 532 of the connecting seat 530, and the groove of the keyway 533 extends along the axial direction of the connecting rod 520. The flat key 522 is disposed on the side of the connecting rod 520 and is slidably connected to the keyway 533. With this configuration, as described above, the connecting rod 520 and the connecting seat 530 are in a sliding connection relationship. To ensure that the connecting rod 520 can slide smoothly along its own axial direction relative to the connecting seat 530, this embodiment provides a keyway 533 and a flat key 522 in the connecting rod 520 and the spring seat respectively. The groove of the keyway 533 extends along the axial direction of the connecting rod 520. The keyway 533 restricts the flat key 522 from circumferentially moving around the connecting rod 520, allowing it to slide only along the axial direction of the connecting rod 520, thus achieving the purpose that the connecting rod 520 can only slide relative to the spring seat along its own axis. Furthermore, since the keyway 533 restricts the flat key 522 from circumferentially moving around the connecting rod 520, the length of the threaded connection between the connecting sleeve 510 and the connecting rod 520 can be adjusted by rotating the connecting sleeve 510 while restricting the connecting rod 520 from rotating.

[0048] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 5The connecting seat 530 is fixedly connected to the mold locking head plate 200. The connecting seat 530 has an inner cavity 531. The end of the connecting rod 520 away from the connecting sleeve 510 extends through the through hole 532 of the connecting seat 530 into the inner cavity 531. The end of the connecting rod 520 away from the connecting sleeve 510 is provided with a limiting ring 521, which abuts against the through hole 532. The connecting rod 520 is fitted with a spring member 540, and the two ends of the spring member 540 abut against the connecting seat 530 and the limiting ring 521, respectively. With this configuration, when the injection station moving device is working, the rotary motor 610 drives the lead screw 310 to rotate, causing the injection station base 100 to gradually move closer to the mold. The nozzle of the molten plastic cylinder installed on the injection station base 100 also gradually and tightly engages with the sprue sleeve of the mold. Subsequently, as the rotary motor 610 continues to drive the lead screw 310 to rotate, due to the positional limitation between the molten plastic cylinder and the mold, the injection station base 100 cannot move forward any further. At this point, the position of the injection station base 100 remains unchanged while the lead screw 310 moves away from the mold. Since the lead screw 310 in the transmission assembly 300 is connected to the connecting rod 520 through the connecting sleeve 510, the connecting rod 520 moves along the shaft of the connecting seat 530 away from the mold clamping head plate 200. The movable spring 540 of the 20 is gradually compressed. The compressive elastic force of the spring 540 is used as the contact force of the nozzle, which can counteract the reverse thrust generated when the molten material is injected into the mold from the nozzle. It can be understood that since the compressive elastic force of the spring 540 acts on the connecting rod 520 in the direction of approaching the mold head plate 200, while the reverse thrust acts on the connecting rod 520 in the direction of away from the mold head plate 200, the two directions are opposite, so that the compressive elastic force of the spring 540 can counteract the reverse thrust. This prevents the injection station 100 from moving away from the mold, so as to ensure that the nozzle of the molten material cylinder and the sprue sleeve of the mold always remain tightly engaged, and further avoid the nozzle leakage.

[0049] Further, see attached document. Figure 3 The connecting rod 520 is equipped with a sensing block 523, and the connecting seat 530 is equipped with a detection switch 534 via a bracket (not shown in the attached figure). The detection switch 534 is electrically connected to the power component 600. With this configuration, as described above, when the spring 540 provides compressive elastic force as the nozzle contact force, the connecting rod 520 will inevitably move away from the mold clamping head plate 200 along the axis of the connecting seat 530. At this time, by measuring the movement distance of the connecting rod 520 relative to the connecting seat 530, the magnitude of its nozzle contact force can be calculated. Thus, it can be known how much reverse thrust the nozzle contact force can offset. This facilitates the subsequent adjustment of the output power of the power component 600 based on the magnitude of its reverse thrust, i.e., adjusting the displacement distance of the connecting rod 520 relative to the connecting seat 530.

[0050] Furthermore, several detection switches 534 are provided, with a distance difference between any two detection switches 534 along the axis of the connecting rod 520. With this arrangement, since the displacement distance of the connecting rod 520 relative to the connecting seat 530 varies, the nozzle contact force also varies accordingly. Therefore, by providing several detection switches 534, and ensuring a distance difference between any two detection switches 534 along the axis of the connecting rod 520, the magnitude of the nozzle contact force can be determined by observing which detection switch 534 the sensing block 523 moves to, thus improving the intuitiveness of adjustment. In this embodiment, two detection switches 534 are provided.

[0051] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 4-5 The other end of the connecting sleeve 510 is provided with an internal thread, and the end of the connecting rod 520 near the connecting sleeve 510 is provided with an external thread, which is threadedly engaged with the internal thread. With this configuration, the threaded connection between the connecting sleeve 510 and the connecting rod 520 can be achieved through the above structure. The structure is simple and highly practical.

[0052] Furthermore, at least two limiting nuts 550 are threaded onto the connecting rod 520. These limiting nuts 550 abut against the other end of the connecting sleeve 510. With this configuration, after the threaded connection length between the connecting sleeve 510 and the connecting rod 520 is adjusted, the limiting nuts 550 are rotated along the external thread of the connecting rod 520 until they abut against the end of the connecting sleeve 510, preventing the connecting sleeve 510 from rotating relative to the connecting rod 520 and thus preventing loosening between the connecting sleeve 510 and the connecting rod 520. In this embodiment, two limiting nuts 550 are provided.

[0053] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 1-2 The two sets of transmission components 300 are interconnected by a linkage component 400, and the power component 600 is connected to one side of the transmission component 300. The power component 600 is used to drive the one side of the transmission component 300 to move, and the other side of the transmission component 300 moves synchronously under the action of the linkage component 400.

[0054] Specifically, the power assembly 600 includes a rotary motor 610, which is connected to the end of the lead screw 310 of its transmission assembly 300 away from the connecting sleeve 510 via a coupling 620. This configuration, using the rotary motor 610 as the power source to drive the lead screw 310 in rotation, is simple in structure and highly practical. Furthermore, the coupling 620 allows the two shafts to rotate together without disengaging during motion and power transmission. It not only transmits torque but also compensates for misalignments (including axial, radial, angular, or combined misalignments) between the two shafts caused by manufacturing inaccuracies, deformation during operation, or thermal expansion. This application uses the coupling 620 to ensure that the rotary motor 610 can smoothly drive the lead screw 310 in rotation.

[0055] Specifically, see the attached document. Figure 2 The linkage component 400 includes a driving wheel 410, a driven wheel 420, and a transmission belt 430. The driving wheel 410 is fixedly mounted on the lead screw 310 of one side of the transmission component 300, and the driven wheel 420 is fixedly mounted on the lead screw 310 of the other side of the transmission component 300. The driving wheel 410 and the driven wheel 420 are connected by the transmission belt 430. With this configuration, the power component 600 and the driving wheel 410 should be mounted on the lead screw 310 of the same side of the transmission component 300. When the power component 600 drives the lead screw 310 of one side of the transmission component 300 to rotate, the driving wheel 410 fixedly mounted on the lead screw 310 rotates accordingly. Subsequently, the driving wheel 410 drives the driven wheel 420 to rotate through the transmission belt 430, so that the lead screw 310 of the other side of the transmission component 300 rotates accordingly, thereby achieving the purpose of synchronous movement of the two sets of transmission components 300.

[0056] Furthermore, the linkage assembly 400 also includes several idler pulleys 440 and auxiliary pulleys 450. The idler pulleys 440 are used to adjust the tension of the transmission belt 430, and the auxiliary pulleys 450 are used to change the transmission direction of the transmission belt 430, so that the transmission belt 430 can bypass the firing platform 100 and connect with the driving pulley 410 and the driven pulley 420. With this configuration, since the two sets of transmission assemblies 300 are respectively located on opposite sides of the firing platform 100, without damaging the original structure of the firing platform 100, the transmission belt 430, through the cooperation of the several idler pulleys 440 and the auxiliary pulleys 450, bypasses the firing platform 100 and smoothly connects the driving pulley 410 and the driven pulley 420, ensuring the smooth implementation of the technical solution of this application. In this embodiment, the transmission belt 430 passes around the firing platform 100 from the bottom.

[0057] This embodiment also discloses an injection molding machine, including the injection stage moving device of any of the above embodiments. The specific structure of the injection stage moving device can be referred to the above embodiments. Since this injection molding machine adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0058] It should be noted that the injection stage moving device and other contents of the injection molding machine disclosed in this utility model are prior art and will not be described in detail here.

[0059] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.

Claims

1. A injection stage moving device, applied to an injection molding machine, wherein the injection molding machine includes an injection stage base and a mold clamping head plate; characterized in that, The firing platform moving device includes: Two sets of transmission components are symmetrically arranged on opposite sides of the injection unit; each set of transmission components is connected to the mold clamping head plate via a connecting component. A power assembly for driving the transmission assembly, so that the transmission assembly drives the injection station to move toward the clamping head plate; The transmission assembly includes a lead screw; the connection assembly includes a connecting sleeve, a connecting rod, and a connecting seat connected in sequence, one end of the connecting sleeve is rotatably connected to the lead screw, and the other end of the connecting sleeve is threadedly connected to the connecting rod; the connecting rod can move axially relative to the connecting seat, and a limiting structure is provided between the connecting rod and the connecting seat, the limiting structure being used to limit the circumferential movement of the connecting rod relative to the connecting seat.

2. The firing platform moving device as described in claim 1, characterized in that: The side of the launcher base is provided with a bearing seat, and the middle part of the lead screw is supported in the bearing seat; wherein the bearing seat is fixedly connected to the lead screw nut, and the lead screw nut is threadedly connected to the lead screw.

3. The firing platform moving device as described in claim 1, characterized in that: The connecting seat is fixedly connected to the locking head plate. The connecting seat has an inner cavity. The end of the connecting rod away from the connecting sleeve extends through the through hole of the connecting seat into the inner cavity. The end of the connecting rod away from the connecting sleeve is provided with a limiting ring, which abuts against the through hole. The connecting rod is fitted with a spring, and the two ends of the spring abut against the connecting seat and the limiting ring, respectively.

4. The platform moving device as described in claim 3, characterized in that: The limiting structure includes a keyway and a flat key; the keyway is disposed in the through hole of the connector, and the groove of the keyway extends along the axial direction of the connecting rod; the flat key is disposed on the side of the connecting rod, and the flat key is slidably connected in the keyway.

5. The platform moving device as described in claim 1, characterized in that: The other end of the connecting sleeve is provided with an internal thread, and the end of the connecting rod near the connecting sleeve is provided with an external thread, the external thread being threadedly engaged with the internal thread; Additionally, at least two limiting nuts are threaded onto the connecting rod, and the limiting nuts are used to abut against the other end of the connecting sleeve.

6. The firing platform moving device as described in claim 1, characterized in that: The connecting rod is equipped with a sensing block, and the connecting seat is equipped with a detection switch via a bracket. The detection switch is electrically connected to the power component. Furthermore, a plurality of detection switches are provided, and any two detection switches have a distance difference along the axial direction of the connecting rod.

7. The firing platform moving device as described in claim 1, characterized in that: The two sets of transmission components are interconnected by a linkage component, and the power component is connected to the transmission component on one side of it; the power component is used to drive the transmission component on one side to move, and the transmission component on the other side moves synchronously under the action of the linkage component.

8. The platform moving device as described in claim 7, characterized in that: The power assembly includes a rotary motor, which is connected to the end of the lead screw of the transmission assembly on one side of the assembly away from the connecting sleeve via a coupling.

9. The firing platform moving device as described in claim 7, characterized in that: The linkage assembly includes a driving wheel, a driven wheel, and a transmission belt. The driving wheel is fixedly mounted on the lead screw of the transmission assembly on one side, and the driven wheel is fixedly mounted on the lead screw of the transmission assembly on the other side. The driving wheel and the driven wheel are connected by the transmission belt. Furthermore, the linkage assembly also includes several idler pulleys and auxiliary pulleys. The idler pulleys are used to adjust the tension of the transmission belt, and the auxiliary pulleys are used to change the transmission direction of the transmission belt so that the transmission belt can bypass the injection station and connect with the driving pulley and the driven pulley.

10. An injection molding machine, characterized in that: The injection molding machine includes the injection stage moving device as described in any one of claims 1 to 9.

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