Linkage device for mold opening and closing equipment and mold opening and closing equipment

Abstract

The utility model provides a linkage device for mold opening and closing equipment, which comprises a fixed plate, a movable plate and a crank arm mechanism connected between the fixed plate and the movable plate, the crank arm mechanism comprises a first crank arm assembly, a second crank arm assembly and a third crank arm assembly, the first end of the first crank arm assembly is movably connected with the fixed plate, and the second end of the second crank arm assembly is movably connected with the movable plate; the first end of the second crank arm assembly is movably connected with the movable plate; the second end of the second crank arm assembly is movably connected with the second end of the first crank arm assembly; and the third crank arm assembly is arranged on the first crank arm assembly or the second crank arm assembly, and the third crank arm assembly drives the first crank arm assembly and the second crank arm assembly to do folding or unfolding motion so as to drive the movable plate to do reciprocating motion towards the fixed plate or away from the fixed plate. The linkage device and the mold opening and closing equipment provided by the utility model are simple in structure and better in reliability and stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of mold processing equipment, specifically relating to a linkage device and mold opening and closing equipment for mold opening and closing equipment. Background Technology

[0002] In many industrial manufacturing fields such as injection molding, die casting, and stamping, product forming requires the participation of molds. Taking injection molding as an example, after plastic granules are heated and melted in the barrel of an injection molding machine, the molten plastic is injected into the mold cavity by the push of the screw. To complete this process, the mold needs to open and close precisely, which has led to the development of mold opening and closing equipment. Early manual mold opening and closing methods were inefficient and difficult to guarantee accuracy. With the expansion of industrial production scale and the improvement of product quality requirements, the demand for efficient and precise mold opening and closing equipment has become increasingly urgent.

[0003] Mechanical transmission is a key component of mold opening and closing equipment. Traditional belt drives are gradually being replaced by more precise ball screw drives, hydraulic drives, and electric servo drives. While electric servo drive systems offer high precision and good dynamic response performance, their overload capacity is relatively weak. Therefore, further optimization of the mold opening and closing equipment structure is necessary to improve its performance. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a linkage device and mold opening and closing equipment with simple structure and good performance.

[0005] To solve the above-mentioned technical problems, this utility model provides a linkage device for a mold opening and closing equipment, comprising: a fixed plate, a movable plate, and a crank arm mechanism connected between the fixed plate and the movable plate, wherein the crank arm mechanism includes:

[0006] A first articulated arm assembly, the first end of which is movably connected to the fixed plate;

[0007] The second articulated arm assembly has a first end movably connected to the movable plate; the second end of the second articulated arm assembly is movably connected to the second end of the first articulated arm assembly.

[0008] The third articulated arm assembly is disposed on the first articulated arm assembly or the second articulated arm assembly. The third articulated arm assembly drives the first articulated arm assembly and the second articulated arm assembly to perform a retracting or unfolding movement, thereby driving the movable plate to perform a reciprocating movement toward or away from the fixed plate.

[0009] Preferably, the third curved arm assembly includes a slide rail, a swing arm assembly, and a slider. The slide rail is fixedly connected to the first curved arm assembly or the second curved arm assembly. The first end of the slider is movably engaged in the slide rail, and the second end of the slider is fixedly connected to the swing arm assembly. When the swing arm assembly drives the slider to slide in the slide rail, it can drive the first curved arm assembly and the second curved arm assembly to perform a retracting or unfolding movement.

[0010] Preferably, the first end of the swing arm assembly is fixedly connected to the second end of the slider, and the second end of the swing arm assembly is further provided with a connecting part, which is used to be fixedly connected to an external drive mechanism. When the external drive structure drives the swing arm assembly to rotate around the output shaft of the external drive mechanism, it can drive the slider to reciprocate within the slide rail.

[0011] Preferably, the slide rail has two limiting parts at both ends, and two limiting parts are arranged opposite each other at each end. The distance between the two opposing limiting parts is less than the outer diameter of the slider.

[0012] Preferably, the fixed plate and the movable plate are provided with mounting seats, the first crank arm assembly and the second crank arm assembly include rotary bearings, the rotary bearings are fixedly connected to the mounting seats, and the rotary bearings are movably connected to the first crank arm assembly and the second crank arm assembly respectively, and the first crank arm assembly and the second crank arm assembly can rotate clockwise or counterclockwise with the rotary bearings as the axis.

[0013] Preferably, the linkage device includes multiple sets of the crank arm mechanism and the connecting rod assembly, and the connecting rod assembly is fixedly connected to the multiple sets of the crank arm mechanism.

[0014] This utility model also provides a mold opening and closing device, including a mold assembly and two sets of linkage devices for mold opening and closing as described in any of the above claims, wherein the mold assembly includes an upper mold and a lower mold, the movable plate of the upper linkage device faces downward, and the movable plate of the lower linkage device faces upward, the upper mold and the lower mold are respectively fixedly connected to the movable plate, and when the linkage device performs an unfolding movement, the two movable plates move towards each other and drive the upper mold and the lower mold to move towards each other, thereby completing the mold closing.

[0015] Preferably, the mold opening and closing device further includes a guide rod disposed between the linkage devices. The guide rod is vertically disposed and fixedly connected to the upper and lower linkage devices respectively. The movable plate is sleeved on the guide rod and can reciprocate along the guide rod.

[0016] Preferably, the mold opening and closing device includes a first drive mechanism, which is respectively disposed on the upper and lower linkage devices and located between adjacent crank arm mechanisms. The output shaft of the first drive mechanism is respectively oriented towards the crank arm mechanisms on both sides and fixedly connected to the third crank arm assembly. The first drive mechanism can drive the third crank arm assembly to reciprocate.

[0017] Preferably, the mold opening and closing device further includes a second drive mechanism, which is disposed between the movable plate and the fixed plate of the linkage device. The output shaft of the second drive mechanism faces the movable plate and is fixedly connected to the movable plate. The output shaft of the second drive mechanism can reciprocate in the vertical direction.

[0018] Compared with existing technologies, the linkage device and mold opening / closing equipment of this solution have at least the following beneficial effects:

[0019] 1. The linkage device provided in this solution, by setting a third crank arm assembly on the crank arm assembly to drive the first and second crank arm assemblies to reciprocate, can drive the movable plate to reciprocate, so as to be used for the mold opening and closing operation. The structure is simple.

[0020] 2. Based on the above, the third curved arm assembly is equipped with a slide rail with a limited stroke and sliders connected to the slide rail and the swing arm assembly respectively. During the swinging process, the swing arm assembly drives the slider to reciprocate within the slide rail, thereby driving the first and second curved arm assemblies to perform retraction and expansion movements, so as to realize the reciprocating movement of the movable plate. The structure is ingenious and highly reliable.

[0021] 3. The mold opening and closing equipment in this solution adopts two sets of the above-mentioned linkage devices. The relatively set linkage devices can realize the precise opening and closing operation of the upper mold and the lower mold, and have good stability and reliability. Attached Figure Description

[0022] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0023] Figure 1 A schematic diagram of the unfolded state of the linkage device for the mold opening and closing equipment provided in this embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the retracted state of the linkage device for the mold opening and closing equipment provided in this embodiment of the utility model;

[0025] Figure 3This is a schematic diagram of the mold-closing state of the mold-closing device provided in another embodiment of the present invention;

[0026] Figure 4 This is a structural schematic diagram of the mold opening state of the mold opening and closing device provided in another embodiment of the present utility model. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand this utility model and implement it. However, the embodiments are not intended to limit this utility model. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0028] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0029] Please refer to Figures 1-2This utility model provides a linkage device 1 for opening and closing a mold, including: a fixed plate 2, a movable plate 3, and a crank arm mechanism 4 connected between the fixed plate 2 and the movable plate 3. The crank arm mechanism 4 includes: a first crank arm assembly 401, the first end of which is movably connected to the fixed plate 2; and a second crank arm assembly 402, the first end of which is movably connected to the movable plate 3, and the second end of which is movably connected to the second end of the first crank arm assembly 401. Specifically, the first crank arm assembly 401 and... The second articulated arm assembly 402 can be movably connected via a rotatable bearing, or other mechanism / structure / part that enables relative rotation between the first articulated arm assembly 401 and the second articulated arm assembly 402. The third articulated arm assembly 403 is mounted on either the first articulated arm assembly 401 or the second articulated arm assembly 402. The third articulated arm assembly 403 drives the first articulated arm assembly 401 and the second articulated arm assembly 402 to retract or extend, thereby causing the movable plate 3 to reciprocate towards or away from the fixed plate 2. It is understood that when the first articulated arm assembly 401 and the second articulated arm assembly 402 retract, the movable plate 3 moves towards the fixed plate 2; when the first articulated arm assembly 401 and the second articulated arm assembly 402 extend, the movable plate 3 moves away from the fixed plate 2. In this embodiment, the linkage device 1 is vertically placed, therefore the movable plate 3 can reciprocate upward or downward in the vertical direction. In other embodiments, the linkage device 1 can be placed horizontally, in which case the first curved arm assembly 401 and the second curved arm assembly 402 can drive the movable plate 3 to move forward or backward in the horizontal direction.

[0030] The linkage device 1 provided in this embodiment has a simple structure, high reliability, and can ensure good stability.

[0031] Please refer to Figures 1-2 In a preferred embodiment, the third articulated arm assembly 403 includes a slide rail 404, a swing arm assembly 405, and a slider 406. The slide rail 404 is fixedly connected to the first articulated arm assembly 401 or the second articulated arm assembly 402. The first end of the slider 406 is movably engaged within the slide rail 404, and the second end of the slider 406 is fixedly connected to the swing arm assembly 405. When the swing arm assembly 405 drives the slider 406 to slide within the slide rail 404, it can drive the first articulated arm assembly 401 and the second articulated arm assembly 402 to perform a retracting or unfolding movement. Understandably, when the swing arm assembly 405 swings around a fixed axis, the slider 406 connected to the end of the swing arm assembly 405 will slide within the slide rail 404, thereby generating a force on the slide rail 404 to drive the first articulated arm assembly 401 and the second articulated arm assembly 402 to move. The first curved arm assembly 401 and the second curved arm assembly 402 are driven by the swing arm assembly 405, slider 406, and slide rail 404. The structure is ingenious and has high stability.

[0032] Please refer to Figures 1-2 Furthermore, the first end of the swing arm assembly 405 is fixedly connected to the second end of the slider 406. The second end of the swing arm assembly 405 is also provided with a connecting part 407, which is used to be fixedly connected to an external drive mechanism. When the external drive mechanism drives the swing arm assembly 405 to rotate around the output shaft of the external drive mechanism, it can drive the slider 406 to reciprocate within the slide rail 404. Connectably, the swing arm assembly 405 is fixedly connected to the output shaft of the external drive mechanism. When the output shaft rotates, it will drive the swing arm assembly 405 to rotate. Simultaneously, the swing arm assembly 405 is fixedly connected to the slider 406, thus driving the slider 406 to slide within the slide rail 404. The external drive mechanism can be a reducer, coupler, or other transmission mechanism, which can ensure that the joint connecting the first crank arm assembly 401 and the second crank arm assembly 402 has suitable joint speed and torque, meeting the torque requirements of the mold opening and closing equipment 5.

[0033] Please refer to Figures 1-2 In a preferred embodiment, limiting portions 408 are provided at both ends of the inner side of the slide rail 404. Two limiting portions 408 are provided at each end, and the distance between the two opposing limiting portions 408 is less than the outer diameter of the slider 406. The limiting portions 408 slightly protrude from the inner surface of the slide rail 404, which can be used to limit the movement trajectory of the slider 406 within the slide rail 404, preventing the slider 406 from falling out of the slide rail 404 and causing a serious accident when the mold opening and closing device 5 is overloaded. The linkage device 1 in this embodiment has a high level of safety.

[0034] Please refer to Figures 1-2 In this embodiment, mounting bases 409 are provided on the fixed plate 2 and the movable plate 3. The first crank arm assembly 401 and the second crank arm assembly 402 include a rotary bearing 410. The rotary bearing 410 is fixedly connected to the mounting base 409 and is movably connected to the first crank arm assembly 401 and the second crank arm assembly 402 respectively. The first crank arm assembly 401 and the second crank arm assembly 402 can rotate clockwise or counterclockwise with the rotary bearing 410 as the axis. Understandably, the first articulated arm assembly 401 and the second articulated arm assembly 402 are movably connected to the mounting bases 409 of the fixed plate 2 and the movable plate 3 respectively via rotating bearings 410. On the one hand, this avoids direct connection between the first articulated arm assembly 401 and the second articulated arm assembly 402 and the fixed plate 2 and the movable plate 3, thereby enhancing the connection strength between the first articulated arm assembly 401 and the fixed plate 2, and the second articulated arm assembly 402 and the movable plate 3, achieving higher overload performance and reliability. On the other hand, it allows the first articulated arm assembly 401 to rotate relative to the fixed plate 2 and the second articulated arm assembly 402 to rotate relative to the movable plate 3.

[0035] Please refer to Figures 1-2In this embodiment, the linkage device 1 includes multiple sets of crank arm mechanisms 4 and a connecting rod assembly 411, which is fixedly connected to the multiple sets of crank arm mechanisms 4. The connecting rod assembly 411, by fixing the multiple sets of crank arm mechanisms 4 together, ensures the synchronization of the multiple sets of crank arm mechanisms 4 during operation. The multiple sets of crank arm mechanisms 4 allow for more even force distribution on the movable plate 3 during operation, thus enhancing the reliability of the linkage device 1. Understandably, the connecting rod assembly 411 can be connected to the first crank arm assembly 401 of the multiple sets of crank arm mechanisms 4, or to the second crank arm assembly 402 of the multiple sets of crank arm mechanisms 4; it can also be connected at the junction of the first crank arm assembly 401 and the second crank arm assembly 402, as long as the multiple sets of crank arm mechanisms 4 are connected. In this embodiment, a third crank arm assembly 403 can be set on one of the multiple crank arm mechanisms 4. Through the action of the connecting rod assembly 411, a single third crank arm assembly 403 can drive multiple crank arm mechanisms 4, and the synchronization of the multiple crank arm mechanisms 4 is better. In other embodiments, a third crank arm mechanism 4 can be set on each crank arm mechanism 4, which can ensure a stronger force and ensure that the mold opening and closing device 5 has a better pressing effect.

[0036] Please refer to Figures 1-4 This utility model embodiment also provides a mold opening and closing device 5, including a mold assembly 501 and two sets of opposing linkage devices 1 as described above. The mold assembly 501 includes an upper mold 502 and a lower mold 503. The movable plate 3 of the upper linkage device 1 faces downward, and the movable plate 3 of the lower linkage device 1 faces upward. The upper mold 502 and the lower mold 503 are respectively fixedly connected to the movable plate 3. When the linkage device 1 performs an unfolding movement, the two movable plates 3 move towards each other and drive the upper mold 502 and the lower mold 503 to move towards each other, completing the mold closing. When the opposing linkage device 1 performs an unfolding movement and unfolds to its end, the mold closing operation of the upper mold 502 and the lower mold 503 is completed. When the linkage device 1 performs a retracting movement, the upper mold 502 and the lower mold 503 move away from each other, completing the mold opening operation.

[0037] Please refer to Figures 1-4In this embodiment, the mold opening and closing device 5 also includes guide rods 504 disposed between the linkage devices 1. The guide rods 504 are vertically arranged and fixedly connected to the upper and lower linkage devices 1 respectively. The movable plate 3 is sleeved on the guide rods 504 and can reciprocate along the guide rods 504. It can be understood that multiple guide rods 504 can be provided and disposed at the four corners of the movable plate 3 respectively. The guide rods 504 are restricted to the movable plate 3. In other words, the guide rods 504 pass through the movable plates 3 of the upper and lower linkage devices 1. When the mold opening and closing device 5 performs mold opening or closing operations, the movable plate 3 will reciprocate along the guide rods 504, which can ensure the safety of the mold opening and closing device 5 during operation, especially in the event of overload, ensuring that the upper mold 502 and the lower mold 503 will not be displaced or deviated.

[0038] Please refer to Figures 1-4 In this embodiment, the mold opening and closing device 5 includes a first drive mechanism 505. The first drive mechanism 505 is respectively mounted on the upper and lower linkage devices 1 and located between adjacent crank arm mechanisms 4. The output shaft of the first drive mechanism 505 faces the crank arm mechanisms 4 on both sides and is fixedly connected to the third crank arm assembly 403. The first drive mechanism 505 can drive the third crank arm assembly 403 to reciprocate. Specifically, the two ends of the output shaft of the first drive mechanism 505 face the adjacent crank arm mechanisms 4 and are fixedly connected to the swing arm assembly 405 of the third crank arm assembly 403. In this way, when the first drive mechanism 505 is working, it can synchronously drive the swing arm assemblies 405 of the two sets of crank arm mechanisms 4 to rotate, ensuring the synchronicity of the linkage device 1 and making the mold opening and closing device 5 more reliable.

[0039] Please refer to Figures 1-4 In this embodiment, the mold opening and closing device 5 further includes a second drive mechanism 506. The second drive mechanism 506 is disposed between the movable plate 3 and the fixed plate 2 of the linkage device 1. The output shaft of the second drive mechanism 506 faces the movable plate 3 and is fixedly connected to the movable plate 3. The output shaft of the second drive mechanism 506 can reciprocate in the vertical direction. It can be understood that the second drive mechanism 506 serves as a supplementary power support for the movable plate 3, the upper mold 502, and the lower mold 503, ensuring the support effect for the upper mold 502 and the lower mold 503, thus improving the reliability of the mold opening and closing device 5.

[0040] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A linkage device for mold opening and closing equipment, characterized in that, include: A fixed plate, a movable plate, and a crank arm mechanism connecting the fixed plate and the movable plate, the crank arm mechanism comprising: A first articulated arm assembly, the first end of which is movably connected to the fixed plate; The second articulated arm assembly has a first end movably connected to the movable plate; the second end of the second articulated arm assembly is movably connected to the second end of the first articulated arm assembly. The third articulated arm assembly is disposed on the first articulated arm assembly or the second articulated arm assembly. The third articulated arm assembly drives the first articulated arm assembly and the second articulated arm assembly to perform a retracting or unfolding movement, thereby driving the movable plate to perform a reciprocating movement toward or away from the fixed plate.

2. The linkage device for mold opening and closing equipment as described in claim 1, characterized in that, The third articulated arm assembly includes a slide rail, a swing arm assembly, and a slider. The slide rail is fixedly connected to the first articulated arm assembly or the second articulated arm assembly. The first end of the slider is movably engaged in the slide rail, and the second end of the slider is fixedly connected to the swing arm assembly. When the swing arm assembly drives the slider to slide in the slide rail, it can drive the first articulated arm assembly and the second articulated arm assembly to perform a retracting or unfolding movement.

3. The linkage device for mold opening and closing equipment as described in claim 2, characterized in that, The first end of the swing arm assembly is fixedly connected to the second end of the slider. The second end of the swing arm assembly is also provided with a connecting part, which is used to be fixedly connected to an external drive mechanism. When the external drive mechanism drives the swing arm assembly to rotate around the output shaft of the external drive mechanism, it can drive the slider to reciprocate within the slide rail.

4. The linkage device for mold opening and closing equipment as described in claim 2, characterized in that, Limiting portions are provided at both ends of the inner side of the slide rail. Two limiting portions are provided at each end, and the distance between the two opposing limiting portions is less than the outer diameter of the slider.

5. The linkage device for mold opening and closing equipment as described in claim 1, characterized in that, Mounting seats are provided on the fixed plate and the movable plate. The first and second articulated arm assemblies include rotary bearings. The rotary bearings are fixedly connected to the mounting seats and movably connected to the first and second articulated arm assemblies respectively. The first and second articulated arm assemblies can rotate clockwise or counterclockwise with the rotary bearings as the axis.

6. The linkage device for mold opening and closing equipment as described in claim 1, characterized in that, The linkage device includes multiple sets of the crank arm mechanism and the connecting rod assembly, and the connecting rod assembly is fixedly connected to the multiple sets of the crank arm mechanism.

7. A mold opening and closing device, characterized in that, The device includes a mold assembly and two sets of linkage devices for mold opening and closing equipment as described in any one of claims 1-6, wherein the mold assembly includes an upper mold and a lower mold, the movable plate of the upper linkage device faces downward, and the movable plate of the lower linkage device faces upward, the upper mold and the lower mold are respectively fixedly connected to the movable plate, and when the linkage device performs an unfolding movement, the two movable plates move towards each other and drive the upper mold and the lower mold to move towards each other, thereby completing the mold closing.

8. The mold opening and closing device as described in claim 7, characterized in that, The mold opening and closing device also includes a guide rod disposed between the linkage devices. The guide rod is vertically disposed and fixedly connected to the upper and lower linkage devices respectively. The movable plate is sleeved on the guide rod and can reciprocate along the guide rod.

9. The mold opening and closing device as described in claim 7, characterized in that, The mold opening and closing device includes a first drive mechanism, which is respectively mounted on the upper and lower linkage devices and located between adjacent crank arm mechanisms. The output shaft of the first drive mechanism is respectively oriented towards the crank arm mechanisms on both sides and is fixedly connected to the third crank arm assembly. The first drive mechanism can drive the third crank arm assembly to reciprocate.

10. The mold opening and closing device as described in claim 7, characterized in that, The mold opening and closing device further includes a second drive mechanism, which is disposed between the movable plate and the fixed plate of the linkage device. The output shaft of the second drive mechanism faces the movable plate and is fixedly connected to the movable plate. The output shaft of the second drive mechanism can reciprocate in the vertical direction.

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