Mold locking device and injection molding machine

Abstract

The invention relates to a mold locking device and an injection molding machine, and belongs to the field of injection molds, and the mold locking device comprises a fixed mold plate, a movable mold plate and a movable mold plate, the movable mold plate is positioned above the fixed mold plate and is fixedly connected with the guide post; the lifting plate is positioned below the fixed mold plate and is fixedly connected with the guide columns; and the configuration barrel is fixedly connected with the lifting plate. According to the mold locking device of the injection molding machine, the configuration barrel connected with the movable mold is arranged, and the configuration barrel has a certain weight and can always provide a downward pulling force for the movable mold, so that the movable mold cannot move up and down relative to a thread of the screw rod at any time; the movable mold does not axially move in the lifting process of the movable mold along the lead screw and the injection molding process after the movable mold makes contact with the fixed mold, so that the injection molding precision is guaranteed, the lead screw does not need to be customized and replaced, only an existing direct-pressure type mold locking device needs to be transformed, the transformation cost is low, and the application prospect is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of injection mold, in particular to a mold clamping device and injection molding machine. BACKGROUND

[0002] The existing mold clamping device of injection molding machine is shown in the patent with publication number CN214645625U, the inventor found that such straight pressure type mold clamping device has the problem of mold locking not being tight in the long-term use process, and further research found that it is because such straight pressure type mold clamping device adopts screw rod to drive the moving mold to move and separate from the fixed mold, and since the thread of the screw rod has a gap, when the moving mold and the fixed mold are in close contact, the fluid injected into the cavity will push the moving mold to move up a very small distance (not more than 2mm), which cannot be found if not carefully observed.

[0003] For some products with low requirements on injection molding precision, the slight shaking of the moving mold does not affect the product forming quality, but for some products with high requirements on injection molding precision, any slight movement of the mold will cause the problem of unqualified injection molding product quality, which is the fundamental reason why the current straight pressure type mold clamping device cannot be used for the production of high injection molding precision products. SUMMARY

[0004] In order to solve the problems existing in the current straight pressure type mold clamping device, the present application provides a mold clamping device and injection molding machine.

[0005] In one aspect of the present disclosure, a mold clamping device is provided, comprising: a fixed mold plate, a guide pillar being slidably installed on the fixed mold plate; a moving mold plate located above the fixed mold plate and fixedly connected with the guide pillar; a lifting plate located below the fixed mold plate and fixedly connected with the guide pillar; a configuration barrel fixedly connected with the lifting plate.

[0006] By adopting the above technical scheme, the configuration barrel has a certain weight and can always provide a downward pulling force to the moving mold, so that the moving mold cannot move up and down relative to the thread of the screw rod at any time, including during the lifting process of the moving mold along the screw rod and during the injection process after the moving mold contacts with the fixed mold, so that the axial movement of the moving mold is prevented, thereby ensuring the injection molding precision. The screw rod does not need to be customized and replaced, only needs to be modified to the existing straight pressure type mold clamping device, the modification cost is low, and the application prospect is broad.

[0007] Preferably, the fixed mold plate is provided with a rotating device and a transmission shaft, and the rotating device is in transmission connection with the transmission shaft; the transmission shaft is in transmission connection with a screw rod, and the screw rod is screwed with the configuration barrel and / or the lifting plate.

[0008] By adopting the technical scheme, the rotating device drives the lead screw to drive the configuration barrel and / or the lifting plate to lift, and then drives the movable mold plate to lift.

[0009] Preferably, the rotating device is adapted to be fixedly connected with the fixed mold plate in sliding mode, and the sliding direction is perpendicular to the lifting direction of the movable mold plate.

[0010] By adopting the technical scheme, it is convenient to replace the pulley with different speed reduction ratios according to different application requirements, and in the case that the synchronous belt is not replaced, the transmission requirements of the synchronous belt are adapted by adjusting the distance between the rotating device and the transmission shaft.

[0011] Preferably, the lower surface of the fixed mold plate is fixedly provided with a sliding frame, and the rotating device is fixedly connected with the sliding frame in horizontal sliding mode. The transmission shaft and the rotating device are connected in transmission mode through the pulley and the synchronous belt. The transmission shaft and the lead screw are connected in transmission mode through the shaft coupling.

[0012] By adopting the technical scheme, the rotating device is fixedly connected with the fixed mold plate in sliding mode.

[0013] Preferably, a positioning plate is arranged between the lifting plate and the fixed mold plate, the positioning plate is arranged in interval with the lifting plate and the fixed mold plate, is slidingly connected with the lifting plate, and the sliding direction is the same as the lifting direction of the movable mold plate, the positioning plate is fixedly connected with the fixed mold plate. The positioning plate is provided with a bearing seat, and the shaft coupling is rotatably arranged on the bearing seat.

[0014] By adopting the technical scheme, the stability of lifting the lifting plate is improved by means of the positioning plate.

[0015] Preferably, the positioning plate and the fixed mold plate are fixedly connected through a plurality of hangers, the positioning plate and the lifting plate are connected through a plurality of guide rods, the guide rods are fixedly connected with the positioning plate and are slidingly connected with the lifting plate in axial direction.

[0016] By adopting the technical scheme, the stability of lifting the lifting plate is improved by means of the positioning plate.

[0017] Preferably, the sliding frame comprises a limiting plate and a supporting plate which are fixedly connected, the limiting plate and the supporting plate are connected to form an L-shaped sliding frame, and the L-shaped sliding frame has a pair of symmetrically arranged structures. The lower surface of the fixed mold plate is fixedly provided with a mounting rod, and the L-shaped sliding frame is fixedly connected with the mounting rod.

[0018] By adopting the technical scheme, the rotating device is conveniently and quickly installed.

[0019] Preferably, a cover plate is arranged on the upper surface of the fixed mold plate, and the cover plate is located above the pulley and the synchronous belt.

[0020] By adopting the technical scheme, the belt wheel and the synchronous belt are conveniently maintained and replaced.

[0021] Preferably, the lower surface of the configuration barrel is provided with a through hole penetrating through the upper and lower ends of the configuration barrel, and the lead screw penetrates through the through hole. A screw cylinder is fixedly installed inside the configuration barrel, and the lead screw is screwed with the screw cylinder.

[0022] By adopting the technical scheme, the stability of the lifting plate in lifting is further improved.

[0023] In another aspect of the present disclosure, an injection molding machine is provided, comprising the mold clamping device of any one of the preceding.

[0024] In summary, the present application has at least one of the following beneficial technical effects: The mold clamping device of the injection molding machine of the present application is provided with a configuration barrel connected with the movable mold, the configuration barrel has a certain weight, and can always provide a downward pulling force to the movable mold, so that the movable mold cannot move up and down relative to the threads of the lead screw at any time, including the movable mold during the lifting process along the lead screw and after the movable mold contacts with the fixed mold during the injection process, the movable mold does not move axially, thereby ensuring the injection precision, the lead screw does not need to be customized and replaced, only needs to be modified to the existing straight pressure type mold clamping device, the modification cost is low, and the application prospect is wide. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of the mold clamping device of the present application Figure 1 .

[0026] Figure 2 is a structure diagram of the mold clamping device of the present application Figure 2 .

[0027] Figure 3 is a structure diagram of the mold clamping device of the present application Figure 3 .

[0028] Figure 4 is a structure diagram of the mold clamping device of the present application Figure 4 .

[0029] Mark 1, fixed mold plate; 2, mounting rod; 3, suspension rod; 4, positioning plate; 5, connecting rod; 6, bearing seat; 7, shaft coupling; 8, lead screw; 9, driven wheel; 10, synchronous belt; 11, driving wheel; 12, motor; 13, limit plate; 14, support plate; 15, guide rod; 16, lifting plate; 17, guide column; 18, movable mold plate; 19, cover plate; 20, configuration barrel; 21, through hole; 22, screw cylinder; 23, transmission shaft. DETAILED DESCRIPTION

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0031] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0032] In one aspect of the embodiments of this disclosure, a mold-locking device is provided, such as Figures 1-4 As shown, the mold-locking device includes: a fixed mold plate 1, a movable mold plate 18, a lifting plate 16, and a configuration bucket 20.

[0033] The fixed template 1 is equipped with a guide column 17 that is slidably installed on it. In specific implementation, the guide column 17 can be slidably connected to the fixed template 1 by penetrating it. Correspondingly, the guide column 17 is set vertically, and the guide column 17 and the fixed template 1 are axially slidably connected.

[0034] To ensure smooth lifting and lowering of the moving template 18 relative to the fixed template 1, such as Figures 1-4 As shown, there are multiple guide posts 17, which are evenly distributed around the perimeter of the template 1.

[0035] like Figures 1-4 As shown, the moving template 18 is located above the fixed template 1 and is fixedly connected to the upper end of the guide post 17.

[0036] like Figures 1-4 As shown, the lifting plate 16 is located below the fixed template 1 and is fixedly connected to the lower end of the guide column 17. Therefore, when the lifting plate 16 is raised or lowered, it drives the template 18 to be raised or lowered through the guide column 17.

[0037] like Figures 1-4 As shown, the configuration barrel 20 is fixedly connected to the lifting plate 16. The configuration barrel 20 has a certain weight and can always provide a downward pulling force to the moving mold, so that the moving mold can never be stopped, thereby ensuring the injection molding accuracy.

[0038] The lifting platform 16 can be raised and lowered in various ways, such as Figure 2 and Figure 3 The fixed template 1 shown is equipped with a rotating device and a transmission shaft 23. The rotating device is connected to the transmission shaft 23. The transmission shaft 23 is connected to a lead screw 8. The lead screw 8 is screwed to the configuration bucket 20 and / or the lifting plate 16. The rotating device drives the lead screw 8 to move the configuration bucket 20 and / or the lifting plate 16 up and down, which in turn drives the moving template 18 up and down.

[0039] The rotating device is preferably a motor 12, and of course, in other embodiments, the rotating device can also be a pneumatic motor, a hydraulic motor, etc.

[0040] When the lead screw 8 is used to drive the lifting plate 16 to lift, in order to improve the lifting stability of the lifting plate 16, as shown in Figure 2 and Figure 3 The positioning plate 4 is arranged between the lifting plate 16 and the fixed mold plate 1, and is arranged in a spaced manner with the lifting plate 16 and the fixed mold plate 1, and is connected in a sliding manner with the lifting plate 16, and the sliding direction is the same as the lifting direction of the movable mold plate 18, and the positioning plate 4 is fixedly connected with the fixed mold plate 1.

[0041] Specifically, as shown in Figure 2 The positioning plate 4 and the fixed mold plate 1 are fixedly connected through a plurality of hangers 3, and the positioning plate 4 and the lifting plate 16 are connected through a plurality of guide rods 15, and the guide rod 15 is fixedly connected with the positioning plate 4 and is connected in an axial sliding manner with the lifting plate 16, and by adopting the above technical scheme, the lifting stability of the lifting plate 16 is improved by means of the positioning plate 4.

[0042] When the mold is large, a large torque is required to drive the movable mold to lift through the lead screw 8, at this time, if the rotating device and the synchronous belt 10 are not changed, the transmission reduction ratio needs to be changed, that is, the distance between the rotating device and the transmission shaft 23 needs to be adjusted, so the rotating device should be adapted to be fixedly connected with the fixed mold plate 1 in a sliding manner, and the sliding direction is perpendicular to the lifting direction of the movable mold plate 18, when the distance needs to be adjusted, loosen the rotating device, then make the rotating device slide relative to the fixed mold plate 1 to adjust the distance between the rotating device and the transmission shaft 23, and after the distance between the rotating device and the transmission shaft 23 is adjusted in place, the rotating device and the fixed mold plate 1 are fixedly connected again.

[0043] In specific implementation, the rotating device should be adapted to be fixedly connected with the fixed mold plate 1 in a sliding manner, which can be achieved by screws and other fasteners.

[0044] By adopting the above technical scheme, it is convenient to replace the pulley with different reduction ratios according to different application requirements, and in the case that the synchronous belt 10 is not replaced, the transmission requirements of the synchronous belt 10 are adapted by adjusting the distance between the rotating device and the transmission shaft 23.

[0045] Specifically, as shown in Figure 2As shown, the lower surface of the fixed mold plate 1 is fixedly provided with a sliding frame, and the rotating device is fixedly connected with the sliding frame in a horizontally sliding manner; the transmission shaft 23 and the rotating device are drivingly connected through a belt wheel and a synchronous belt 10; the belt wheel comprises a driven wheel 9 and a driving wheel 11, the driven wheel 9 is fixedly connected with the upper end of the transmission shaft 23, and the driving wheel 11 is fixedly connected with the output shaft of the rotating device; the lower end of the transmission shaft 23 is drivingly connected with the screw rod 8 through a shaft coupling 7, the positioning plate 4 is provided with a bearing seat 6, and the shaft coupling 7 is rotatably installed on the bearing seat 6, so that the lifting transmission stability is improved, Specifically, as shown in the figure, Figure 2 The sliding frame comprises a limiting plate 13 and a supporting plate 14 which are fixedly connected, and the limiting plate 13 and the supporting plate 14 are connected to form an L-shaped sliding frame, the L-shaped sliding frame is provided in a pair and symmetrically arranged, the rotating device is installed between the pair of L-shaped sliding frames, and the lower surface of the fixed mold plate 1 is fixedly provided with a mounting rod 2, and the L-shaped sliding frame is fixedly connected with the mounting rod 2.

[0046] In order to improve the mounting stability of the pair of sliding frames, as shown in the figure, Figure 3 The pair of mounting rods 2 are fixedly connected through a connecting rod 5.

[0047] It can be seen that the configuration barrel 20 has a certain weight and can always provide a downward pulling force to the movable mold, so that the movable mold cannot move up and down relative to the threads of the screw rod 8 at any time, including during the lifting process of the movable mold along the screw rod 8 and during the injection process after the movable mold contacts the fixed mold, so that the movable mold does not move axially, thereby ensuring the injection precision, and the screw rod 8 does not need to be customized and replaced, but only needs to be modified to the existing straight pressure type mold locking device, which has low modification cost and wide application prospect.

[0048] In the embodiment, as shown in the figure, Figure 4 The upper surface of the fixed mold plate 1 is provided with a cover plate 19, the cover plate 19 is located above the belt wheel and the synchronous belt 10, and the cover plate 19 is arranged to facilitate maintenance and replacement of the belt wheel and the synchronous belt 10.

[0049] In the embodiment, as shown in the figure, Figure 2 The lower surface of the configuration barrel 20 is provided with a through hole 21 penetrating through the upper and lower ends of the configuration barrel 20, and the screw rod 8 penetrates through the through hole 21; as shown in the figure, Figure 4 The inside of the configuration barrel 20 is fixedly provided with a screw cylinder 22, and the screw rod 8 is screwed with the screw cylinder 22.

[0050] In another aspect of the embodiment of the present disclosure, an injection molding machine is provided, which comprises the mold locking device of any one of the preceding aspects.

[0051] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the terms "first", "second" or "third" and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. The terms "one", "another", "an" or "some" as well as similar referents in the context of describing the specification and claims are to be construed to be open-ended, i.e., to cover both singular and plural referents unless otherwise indicated. The terms "including", "containing" or "comprising" and the like are not intended to exclude other integers or steps, but to "include" or "comprise" other integers or steps unless otherwise indicated. The terms "connected", "coupled" or "pathway" are not restricted to direct connections, couplings or pathways but include indirect connections, couplings or pathways unless otherwise indicated. The terms "above", "below", "left", "right" and the like are only used to express relative positions such that if an absolute position of a described object is changed, the relative positions can also be changed accordingly.

[0052] The above are only preferred embodiments of the present application, not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A mold-locking device, characterized in that, include: A fixed template is mounted on which guide columns are lifted and slidably installed; The movable template is located above the fixed template and is fixedly connected to the guide post. The lifting platform is located below the fixed template and is fixedly connected to the guide column; The bucket is fixedly connected to the lifting platform.

2. The mold-locking device according to claim 1, characterized in that: The fixed template is equipped with a rotating device and a transmission shaft, and the rotating device is connected to the transmission shaft in a driving connection. The drive shaft is connected to a lead screw, which is screwed to the configuration bucket and / or lifting plate.

3. The mold-locking device according to claim 2, characterized in that: The rotating device is adapted to be slidably and fixedly connected to the fixed template, and the sliding direction is perpendicular to the lifting direction of the moving template.

4. The mold-locking device according to claim 3, characterized in that: A slide is fixedly installed on the lower surface of the template, and the rotating device is horizontally and slidably fixedly connected to the slide. The drive shaft and the rotating device are connected by pulleys and a synchronous belt. The drive shaft and lead screw are connected by a coupling.

5. The mold-locking device according to claim 4, characterized in that: A positioning plate is provided between the lifting plate and the fixed template. The positioning plate is spaced apart from the lifting plate and the fixed template, and is slidably connected to the lifting plate. The sliding direction is the same as the lifting direction of the moving template. The positioning plate is fixedly connected to the fixed template. The positioning plate is equipped with a bearing seat, and the coupling is rotatably mounted on the bearing seat.

6. The mold-locking device according to claim 5, characterized in that: The positioning plate and the fixed template are fixedly connected by multiple hanging rods, and the positioning plate and the lifting plate are connected by multiple guide rods. The guide rods are fixedly connected to the positioning plate and axially slidably connected to the lifting plate.

7. The mold-locking device according to claim 4, characterized in that: The carriage includes a fixedly connected limiting plate and a support plate, which together form an L-shaped carriage. There is a pair of L-shaped carriages, which are symmetrically arranged. An installation rod is fixedly installed on the lower surface of the template, and the L-shaped carriage is fixedly connected to the installation rod.

8. The mold-locking device according to claim 4, characterized in that: The upper surface of the template is provided with a cover plate, which is located above the pulley and the timing belt.

9. The mold-locking device according to claim 2, characterized in that: The lower surface of the configuration barrel is provided with a through hole that passes through both the upper and lower ends of the configuration barrel, and the lead screw passes through the through hole; A screw cylinder is fixedly installed inside the configuration barrel, and the lead screw is screwed to the screw cylinder.

10. An injection molding machine, characterized in that: Includes the mold-locking device according to any one of claims 1-9.

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