parison mold

Abstract

The injection molding die includes a core plate and a top plate. Guide pillars are arranged on the core plate along the Z-axis, and the top plate is guided to move by these guide pillars. A slide plate assembly and a pull rod assembly are provided on the top plate. A sliding groove assembly and a drive assembly are provided on the core plate. The drive assembly drives the sliding groove assembly to change the engagement state between the sliding groove assembly and the pull rod assembly, thereby controlling the slide plate assembly to open and close in stages. The movement ranges of adjacent slide plate assemblies during opening and closing can overlap. With the overall size of the injection molding die remaining unchanged, the saved space can be used to install more slide plate assemblies, allowing the injection molding die to produce more molded products at once. Furthermore, with the same number of molded products injected at once, the volume of the injection molding die can be reduced, its weight decreased, and its material costs lowered.

Description

Technical Field

[0001] This invention belongs to the field of mold technology, specifically relating to injection molding molds. Background Technology

[0002] Generally, the manufacturing process of plastic bottles requires injection molding to form a preform, an intermediate product, which is then blow molded to form the finished plastic bottle. The preform is formed by injecting raw materials into the cavity of an injection mold under specific temperature and pressure conditions using an injection molding machine. To improve preform production efficiency, the injection mold is equipped with multiple cavities, allowing it to process multiple preforms at once. However, existing injection molds, such as the Chinese utility model patent with patent application number 201320315465.7, disclose a cam-driven mold opening and closing mechanism, including a template, a linkage assembly slidably disposed on the template, at least one set of mold lip mounting assemblies fixed to the linkage assembly, a mold lip fixed to the mold lip mounting assembly, a roller assembly fixed to the same end of the mold lip mounting assembly, and a guide groove movable plate disposed on one side of the roller assembly; wherein, the linkage assembly includes a first and a second linkage slidably disposed parallel to each other in the horizontal direction, and the mold lip mounting assembly includes two parallel adjacent mold lip mounting plates, with the same end of the two mold lip mounting plates respectively fixed... The roller assembly is fixed on the first and second connecting rods. It includes a first roller and a second roller. One end of one mold lip mounting plate fixed to the first connecting rod is fixedly connected to the shaft portion of the first roller, and one end of one mold lip mounting plate fixed to the second connecting rod is fixedly connected to the shaft portion of the second roller. A first guide groove and a second guide groove are provided on the side of the guide groove movable plate facing the roller assembly. The pulley portions of the first and second rollers are slidably disposed within the first and second guide grooves, respectively. The guide groove movable plate is movably mounted on the template in the vertical direction, and the distance between the first and second guide grooves gradually decreases in the vertical direction. During mold opening, all mold lip mounting assemblies open simultaneously. Therefore, space needs to be reserved between each set of mold lip mounting assemblies for mold opening. With this structure, the number of cavities is limited while the overall mold dimensions remain unchanged, making it difficult to increase the number of products injected at one time, and difficult to reduce production costs and improve production efficiency. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a technical solution for injection molding.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] The injection molding die includes a core plate and a top plate. Guide pillars are arranged on the core plate along the Z-axis, and the top plate is guided to move by these guide pillars. A slide plate assembly and a pull rod assembly are provided on the top plate. A sliding groove assembly and a drive assembly are provided on the core plate. The slide plate assembly is connected to the pull rod assembly, and sliding groove assemblies are connected to both ends of the pull rod assembly. The sliding groove assembly is connected to the drive assembly. The drive assembly drives the sliding groove assembly to change the engagement state between the sliding groove assembly and the pull rod assembly, thereby controlling the slide plate assembly to open and close in steps.

[0006] In this invention, the skateboard assembly includes a first skateboard assembly and a second skateboard assembly arranged along the Y-axis direction. The first skateboard assembly and the second skateboard assembly are alternately arranged, and an interval area is provided between the first skateboard assembly and the second skateboard assembly for movement during the opening and closing action of the first skateboard assembly or the second skateboard assembly.

[0007] In this invention, the pull bar assembly includes a first pull bar assembly and a second pull bar assembly that are respectively connected to the first skateboard assembly and the second skateboard assembly, and the first pull bar assembly and the second pull bar assembly are arranged along the X-axis direction.

[0008] In this invention, the first skateboard assembly includes a pair of first skateboards, the second skateboard assembly includes a pair of second skateboards, the first pull bar assembly is used to drive the pair of first skateboards to open and close, and the second pull bar assembly is used to drive the pair of second skateboards to open and close.

[0009] In this invention, the first pull bar assembly includes a first pull bar corresponding to a pair of first slide plates. The first pull bars are also arranged in pairs, and the pair of first slide plates are connected one-to-one to the pair of first pull bars.

[0010] In this invention, the first and second sliding plates extend along the X-axis direction, and the first and second pull bars extend along the Y-axis direction.

[0011] In this invention, the slide rail assembly includes a first slide rail assembly and a second slide rail assembly. The first slide rail assembly is connected to a first pull bar assembly, and the second slide rail assembly is connected to a second pull bar assembly. When the first pull bar assembly is guided by the first slide rail assembly to move along the Y-axis, the second pull bar assembly is guided by the second slide rail assembly to remain stationary in the Y-axis direction. When the second pull bar assembly is guided by the second slide rail assembly to move along the Y-axis, the first pull bar assembly is guided by the first slide rail assembly to remain stationary in the Y-axis direction.

[0012] In this invention, the first slide rail assembly includes a first straight slide rail plate and a first opening and closing slide rail plate disposed at the end of the first pull bar assembly; the second slide rail assembly includes a second straight slide rail plate and a second opening and closing slide rail plate disposed at the end of the second pull bar assembly; the second slide rail assembly and the first slide rail assembly are mirror-symmetrical about the Y-axis.

[0013] In this invention, both the first straight slide plate and the second straight slide plate are provided with straight tracks extending along the Z-axis direction; both the first opening and closing slide plate and the second opening and closing slide plate are provided with curved tracks extending from bottom to top towards the outside of the mold along the Z-axis direction.

[0014] In this invention, the driving assembly includes a driving device and a slide plate connector. The slide assemblies located at the same end of the pull bar assembly are connected by the slide plate connector. The actuating end of the driving device is connected to any slide assembly or slide plate connector at that position.

[0015] The beneficial effects of this invention are as follows: by setting a driving component to drive the sliding groove component to move, the cooperation state between the sliding groove component and the pull bar component can be switched, thereby controlling the sliding plate component to open and close in steps. When the sliding plate component performs the step opening and closing action, the movement range of adjacent sliding plate components during opening and closing can overlap. With the overall size of the injection mold remaining unchanged, the space saved can be used to set more sliding plate components, so that the injection mold can inject more molded products at one time. When the number of molded products injected by the injection mold at one time is the same, the volume of the injection mold can be reduced, the weight of the injection mold can be reduced, and the material cost of the injection mold can be reduced. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the injection mold in the mold-closed state in this embodiment;

[0017] Figure 2 This is a schematic diagram of the first skateboard assembly in the mold-opening state in this embodiment;

[0018] Figure 3 This is a schematic diagram of the second slide plate assembly in the mold-opening state in this embodiment;

[0019] Figure 4 This is a schematic diagram of the installation structure of the pull strip assembly in this embodiment;

[0020] Figure 5 for Figure 2 Enlarged view of section A;

[0021] Figure 6 for Figure 4 Enlarged view of section B. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] Example:

[0024] like Figures 1 to 6 As shown, this embodiment discloses a preform injection mold, including a core plate 1 and a top plate 2. A guide post 11 is provided on the core plate 1 along the Z-axis direction, where the Z-axis direction refers to the direction of movement of the top plate 2 during the ejection action of the preform injection mold. The top plate 2 is guided to move by the guide post 11. Specifically, the top plate 2 is provided with a guide sleeve 21 adapted to the guide post 11. Based on the cooperation between the guide sleeve 21 and the guide post 11, the top plate 2 slides along the Z-axis direction on the core plate 1.

[0025] In this embodiment, the top plate 2 is provided with a sliding plate assembly 3 and a pull bar assembly 4; the core plate 1 is provided with a sliding groove assembly 5 and a drive assembly 6; the sliding plate assembly 3 is connected to the pull bar assembly 4, and both ends of the pull bar assembly 4 are connected to the sliding groove assembly 5, which is connected to the drive assembly 6; the drive assembly 6 drives the sliding groove assembly 5 to change the cooperation state between the sliding groove assembly 5 and the pull bar assembly 4, thereby controlling the sliding plate assembly 3 to open and close in steps.

[0026] The skateboard assembly 3 includes a first skateboard assembly 31 and a second skateboard assembly 32 arranged along the Y-axis direction. The first skateboard assembly 31 and the second skateboard assembly 32 are alternately arranged, and an interval area 33 is provided between the first skateboard assembly 31 and the second skateboard assembly 32 to allow movement when the first skateboard assembly 31 or the second skateboard assembly 32 is opened and closed. The Y-axis direction refers to the direction of movement when the first skateboard assembly 31 and the second skateboard assembly 32 are opened and closed. The pull bar assembly 4 includes a first pull bar assembly 41 and a second pull bar assembly 42 that are respectively connected to the first skateboard assembly 31 and the second skateboard assembly 32. The first pull bar assembly 41 and the second pull bar assembly 42 are arranged along the X-axis direction. The pull bar assembly 4 and the skateboard assembly 3 are configured such that when the first skateboard assembly 31 is opened and closed under the action of the first pull bar assembly 41, it slides relative to the second pull bar assembly 42, and when the second skateboard assembly 32 is opened and closed under the action of the second pull bar assembly 42, it slides relative to the first pull bar assembly 41. That is, the opening and closing actions of the first slide plate assembly 31 and the second slide plate assembly 32 are performed separately. The adjacent first slide plate assembly 31 and second slide plate assembly 32 share a partition area 33. When the first slide plate assembly 31 opens, the second slide plate assembly 32 remains in the closed state; and when the second slide plate assembly 32 opens, the first slide plate assembly 31 remains in the closed state. Therefore, when setting the width of the partition area 33, it is only necessary for the width of the partition area 33 to be greater than or equal to the opening movement distance of the first slide plate assembly 31 or the second slide plate assembly 32. The width of the partition area 33 can save half of the space, so that the injection mold can arrange more slide plate assemblies 3 and set more cavities.

[0027] In this embodiment, the first slide assembly 31 includes a pair of first slides 311, and the second slide assembly 32 includes a pair of second slides 321. The first pull rod assembly 41 is used to drive the pair of first slides 311 to open and close, that is, to drive the pair of first slides 311 to move towards or away from each other. When the pair of first slides 311 move towards each other, the first slide assembly 31 closes; when the pair of first slides 311 move away from each other, the first slide assembly 31 opens. Similarly, the second pull rod assembly 42 is used to drive the pair of second slides 321 to open and close, that is, to drive the pair of second slides 321 to move towards or away from each other.

[0028] In this embodiment, the first pull bar assembly 41 includes a first pull bar 411 corresponding to a pair of first slide plates 311. The first pull bars 411 are also arranged in pairs, and the pairs of first slide plates 311 are connected one-to-one to the pairs of first pull bars 411. When the pairs of first pull bars 411 move towards each other, they cause the pairs of first slide plates 311 to move towards each other; when the pairs of first pull bars 411 move away from each other, they cause the pairs of first slide plates 311 to move away from each other. Similarly, the second pull bar assembly 42 includes a second pull bar 421 corresponding to a pair of second slide plates 321. The second pull bars 421 are also arranged in pairs, and the pairs of second slide plates 321 are connected one-to-one to the pairs of second pull bars 421. The first slide plates 311 and 321 extend along the X-axis direction, and the first pull bars 411 and 421 extend along the Y-axis direction.

[0029] In this embodiment, when the first slide plate assembly 31 and the second slide plate assembly 32 are opening and closing, in order to reduce the wear of the mold, the ends of the first pull bar 411 and the second pull bar 421 are provided with rollers 43. The first pull bar 411 and the second pull bar 421 cooperate with the corresponding slide groove assembly 5 through the rollers 43, so that when the first pull bar 411 and the second pull bar 421 are moving, the wear is reduced by the rolling cooperation between the rollers 43 and the slide groove assembly 5.

[0030] In this embodiment, both the first pull bar 411 and the second pull bar 421 are provided with pull bar grooves 44 extending along the Y-axis direction. The bottom of both the first slide plate 311 and the second slide plate 321 is provided with slide plate sliders 45 for matching the pull bar grooves 44. The sliding engagement in the Y-axis direction between the first pull bar 411 and the first slide plate 311, and between the second pull bar 421 and the second slide plate 321, is achieved through the cooperation of the slide plate sliders 45 and the pull bar grooves 44.

[0031] In this embodiment, the skateboard assembly 3 is provided in N groups, where N≥2. Each group of skateboard assemblies 3 includes a first skateboard assembly 31 and a second skateboard assembly 32. Each first skateboard assembly 31 has a pair of first skateboards 311, and each second skateboard assembly 32 has a pair of second skateboards 321. The pull bar assembly 4 includes at least two groups of first pull bar assemblies 41 and at least two groups of second pull bar assemblies 42. Each group of first pull bar assemblies 41 includes a pair of first pull bars 411, and each group of second pull bars 421 includes a pair of second pull bars 421. During installation, the first skateboards 311 with the same opening and closing direction are fixedly connected to the first pull bars 411 with the same moving direction in the two groups of first pull bar assemblies 41; the second skateboards 321 with the same opening and closing direction are fixedly connected to the second pull bars 421 with the same moving direction in the two groups of second pull bar assemblies 42. Each first skateboard 311 is driven to slide by two first pull bars 411, and each second skateboard 321 is driven to slide by two second pull bars 421, so that the first skateboard 311 and the second skateboard 321 slide in a balanced manner.

[0032] In this embodiment, the slide rail assembly 5 includes a first slide rail assembly 51 and a second slide rail assembly 52. ​​The first slide rail assembly 51 is connected to the first pull bar assembly 41, and the second slide rail assembly 52 is connected to the second pull bar assembly 42. When the first pull bar assembly 41 is guided by the first slide rail assembly 51 to move along the Y-axis, the second pull bar assembly 42 is guided by the second slide rail assembly 52 to remain stationary in the Y-axis direction. This causes the first slide plate assembly 31 connected to the first pull bar assembly 41 to open and close, while the second slide plate assembly 32 connected to the second pull bar assembly 42 remains in a closed state. Similarly, when the second pull bar assembly 42 is guided by the second slide rail assembly 52 to move along the Y-axis, the first pull bar assembly 41 is guided by the first slide rail assembly 51 to remain stationary in the Y-axis direction. This causes the second slide plate assembly 32 connected to the second pull bar assembly 42 to open and close, while the first slide plate assembly 31 connected to the first pull bar assembly 41 remains in a closed state.

[0033] In this embodiment, the first slide rail assembly 51 includes a first straight slide rail plate 511 and a first opening and closing slide rail plate 512 disposed at the end of the first pull bar assembly 41; each end of the first pull bar 411 is connected to a set of first slide rail assemblies 51; the first straight slide rail plate 511 and the first opening and closing slide rail plate 512 are respectively located on both sides of the end of the first pull bar 411; when the roller 43 at the end of the first pull bar 411 is engaged with the first straight slide rail plate 511, the first pull bar 411 moves along the track of the first straight slide rail plate 511, and the first pull bar 411 is guided by the first straight slide rail plate 511 to remain stationary in the Y-axis direction; when the roller 43 at the end of the first pull bar 411 is engaged with the first opening and closing slide rail plate 512, the first pull bar 411 moves along the track of the first opening and closing slide rail plate 512, and the first pull bar 411 is guided by the first opening and closing slide rail plate 512 to move in the Y-axis direction. The first slide rail assembly 51 is located at one end of the paired first pull bar 411 in different directions, so that when the paired first pull bar 411 cooperates with the corresponding first slide rail assembly 51 for guidance, they can perform opening and closing actions simultaneously or remain stationary in the Y-axis direction.

[0034] Similarly, in this embodiment, the second slide rail assembly 52 includes a second straight slide rail plate 521 and a second opening / closing slide rail plate 522 disposed at the end of the second pull bar assembly 42; each end of the second pull bar 421 is connected to a set of second slide rail assemblies 52; the second straight slide rail plate 521 and the second opening / closing slide rail plate 522 are respectively located on both sides of the end of the second pull bar 421. The second slide rail assembly 52 and the first slide rail assembly 51 are mirror-symmetrically arranged about the Y-axis.

[0035] In this embodiment, both the first straight slide plate 511 and the second straight slide plate 521 are provided with straight tracks 53 extending along the Z-axis direction. The straight track 53 on the first straight slide plate 511 is located on the side facing the first pull bar 411; the straight track 53 on the second straight slide plate 521 is located on the side facing the second pull bar 421. Both the first opening and closing slide plate 512 and the second opening and closing slide plate 522 are provided with curved tracks 54 extending from bottom to top towards the outside of the mold along the Z-axis direction; similarly, the curved track 54 of the first opening and closing slide plate 512 is located on the side facing the first pull bar 411, and the curved track 54 of the second opening and closing slide plate 522 is located on the side facing the second pull bar 421.

[0036] In this embodiment, the slide groove assembly 5 is slidably mounted on the mold core plate 1, and the slide groove assembly 5 can slide along the X-axis direction. Specifically, a base 12 is fixedly mounted on the mold core plate 1, and the base 12 is provided with a base slide groove extending along the X-axis direction; the bottom of the slide groove assembly 5 is provided with a slide groove plate slider 13 for slidingly engaging with the base slide groove; the slide groove assembly 5 slides along the X-axis direction on the mold core plate 1 based on the engagement of the slide groove plate slider 13 with the base slide groove.

[0037] In this embodiment, the drive assembly 6 includes a drive device 61 and a slide plate connector 62. The slide assemblies 5 located at the same end of the pull bar assembly 4 are connected through the slide plate connector 62. The actuating end of the drive device 61 is connected to any slide assembly 5 or slide plate connector 62 at that position, so that when the drive device 61 is actuated, it drives all the slide assemblies 5 connected to the slide plate connector 62 to slide synchronously along the X-axis direction. The drive device 61 can be a telescopic cylinder that extends along the X-axis direction.

[0038] In this embodiment, the top plate 2 is also provided with pressure strips 7 and wear-resistant plates 8. Pressure strips 7 are provided on both sides of the paired first pull strips 411 and the paired second pull strips 421. The pressure strips 7 extend along the Y-axis. The wear-resistant plates 8 are disposed between the first pull strips 411 and the second pull strips 421. The wear-resistant plates 8 extend along the X-axis. The pull strip assembly 4, pressure strips 7 and wear-resistant plates 8 on the top plate 2 are configured to form a sliding platform for the sliding plate assembly 3. The sliding plate assembly 3 is located above the sliding platform.

[0039] In addition, this embodiment may further include a third sliding plate assembly, a third pull bar assembly, and a third slide rail assembly; the corresponding third sliding plate assembly is connected to the third pull bar assembly, the third pull bar assembly is connected to the third slide rail assembly, and the track of the slide rail plate passes through the slide rail plate, so that the roller 43 can cooperate with the corresponding slide rail plate track and drive the pull bar to move along the track.

[0040] The working principle of the injection mold in this embodiment is as follows: when the drive device 61 is in the retracted state, the roller 43 of the first pull bar 411 cooperates with the curved track 54 of the first opening and closing slide plate 512, and the roller 43 of the second pull bar 421 cooperates with the straight track 53 of the second straight slide plate 521.

[0041] First, the molded part on the first slide assembly 31 is demolded and removed. The specific action process is as follows: The ejection mechanism drives the top plate 2 to eject. The top plate 2 moves upward along the guide post 11, which drives the pull rod assembly 4 and the slide assembly 3 to move upward. During the upward movement of the pull rod assembly 4, the first pull rod 411 is displaced along the curved track 54 in the Y-axis direction, thereby separating the first slide assembly 31 connected to the first pull rod 411. The first slide assembly 31 opens the mold, and the molded part on the first slide assembly 31 can be demolded and removed. The second pull rod 421 does not move along the straight track 53 in the Y-axis direction, so the second slide assembly 32 remains closed.

[0042] Then the ejection mechanism resets, causing the top plate 2 to move down along the guide rail. At this time, the pull bar assembly 4 and the slide plate assembly 3 also reset, and the first slide plate assembly 31 returns to the mold closing state. The drive device 61 is activated, causing the slide groove assembly 5 to slide along the X-axis.

[0043] At this point, the molded part on the second slide assembly 32 is demolded and removed. The specific action process is as follows: The ejection mechanism drives the top plate 2 to eject. At this time, the top plate 2 moves upward along the guide post 11, which drives the pull rod assembly 4 and the slide assembly 3 to move upward. During the upward movement of the pull rod assembly 4, the second pull rod 421 is displaced along the curved track 54 in the Y-axis direction, thereby separating the second slide assembly 32 connected to the second pull rod 421. The second slide assembly 32 opens the mold, and the molded part on the second slide assembly 32 can be demolded and removed. Meanwhile, the first pull rod 411 does not move along the straight track 53 in the Y-axis direction, so the first slide assembly 31 remains closed.

[0044] Then the ejection mechanism resets, causing the top plate 2 to move down along the guide rail. At this time, the pull bar assembly 4 and the slide plate assembly 3 also reset, and the second slide plate assembly 32 returns to the mold-closing state; that is, the demolding and removal of all molded products is completed.

[0045] In this embodiment, the first slide plate assembly 31 and the second slide plate assembly 32, which are alternately arranged in the slide plate assembly 3, are opened and closed in steps. This means that only the space required for the opening and closing action of the first slide plate assembly 31 and the second slide plate assembly 32 needs to be separated by the space required for the opening and closing action of the slide plate assembly 3. Adjacent first slide plate assemblies 31 and second slide plate assemblies 32 can share a gap area 33. Therefore, while keeping the overall size of the injection mold unchanged, more space can be saved for the slide plate assembly 3, allowing the injection mold to produce more molded products at one time.

[0046] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by essentially the same means is within the protection scope of the present invention.

Claims

1. A parison mold comprising a core plate and a top plate, the core plate being provided with a guide post in the direction of the Z axis, the top plate being configured to be guided to move by the guide post; characterized in that: The top plate is provided with a sliding plate assembly and a pull bar assembly; the core plate is provided with a sliding groove assembly and a drive assembly; the sliding plate assembly is connected to the pull bar assembly, and both ends of the pull bar assembly are connected to the sliding groove assembly, which is connected to the drive assembly; the drive assembly drives the sliding groove assembly to move, changing the cooperation state between the sliding groove assembly and the pull bar assembly, thereby controlling the sliding plate assembly to open and close in steps. The skateboard assembly includes a first skateboard assembly and a second skateboard assembly arranged along the Y-axis direction. The first skateboard assembly and the second skateboard assembly are alternately arranged, and an interval area is provided between the first skateboard assembly and the second skateboard assembly for movement during the opening and closing action of the first skateboard assembly or the second skateboard assembly. The first skateboard component is molded, while the second skateboard component remains molded. The second skateboard component is molded, while the first skateboard component remains molded.

2. The injection mold according to claim 1, wherein: The pull bar assembly includes a first pull bar assembly and a second pull bar assembly that are respectively connected to the first skateboard assembly and the second skateboard assembly, and the first pull bar assembly and the second pull bar assembly are arranged along the X-axis direction.

3. The injection mold of claim 2, wherein: The first skateboard assembly includes a pair of first skateboards, and the second skateboard assembly includes a pair of second skateboards. The first pull bar assembly is used to drive the opening and closing action of the pair of first skateboards, and the second pull bar assembly is used to drive the opening and closing action of the pair of second skateboards.

4. The injection mold of claim 3, wherein: The first pull bar assembly includes a first pull bar corresponding to a pair of first slide plates. The first pull bars are also arranged in pairs, and the pair of first slide plates are connected one-to-one to the pair of first pull bars.

5. The injection mold according to claim 4, characterized in that: The first and second sliding plates extend along the X-axis, and the first and second pull bars extend along the Y-axis.

6. The injection mold according to claim 2, characterized in that: The slide rail assembly includes a first slide rail assembly and a second slide rail assembly. The first slide rail assembly is connected to a first pull bar assembly, and the second slide rail assembly is connected to a second pull bar assembly. When the first pull bar assembly is guided to move along the Y-axis direction by the first slide rail assembly, the second pull bar assembly remains stationary in the Y-axis direction by the second slide rail assembly. When the second pull bar assembly is guided to move along the Y-axis direction by the second slide rail assembly, the first pull bar assembly remains stationary in the Y-axis direction by the first slide rail assembly.

7. The injection mold according to claim 6, characterized in that: The first slide rail assembly includes a first straight slide rail plate and a first opening and closing slide rail plate disposed at the end of the first pull bar assembly; the second slide rail assembly includes a second straight slide rail plate and a second opening and closing slide rail plate disposed at the end of the second pull bar assembly; the second slide rail assembly and the first slide rail assembly are mirror-symmetrical about the Y-axis.

8. The injection mold according to claim 7, characterized in that: Both the first and second straight slide plates are provided with straight tracks extending along the Z-axis direction; both the first and second opening and closing slide plates are provided with curved tracks extending from bottom to top towards the outside of the mold along the Z-axis direction.

9. The injection mold according to claim 1, characterized in that: The drive assembly includes a drive device and a slide plate connector. The slide assemblies located at the same end of the pull bar assembly are connected by the slide plate connector. The actuating end of the drive device is connected to any slide assembly or slide plate connector at that position.

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