Mold closing mechanism and injection molding equipment

Abstract

The invention belongs to the technical field of injection molding equipment, and discloses a mold closing mechanism and injection molding equipment. The mold closing mechanism comprises a bearing piece, a supporting core shaft, a rotating disc, a rotating shaft and a driving assembly. The supporting mandrel is rotationally arranged on the bearing piece. The rotary disc is arranged on the supporting mandrel and used for bearing the movable mold and driving the movable mold to rotate through the supporting mandrel so as to switch the cavities. The rotating shaft penetrates through the supporting mandrel and is connected with the movable mold, the rotating shaft can translate relative to the supporting mandrel so as to drive the movable mold to be close to / away from the fixed mold to realize opening and closing of the mold, and the rotating shaft can also rotate relative to the supporting mandrel so as to drive a core pulling component on the movable mold to act. The driving assembly is arranged on the bearing piece and is configured to drive the rotating disc to rotate and further configured to drive the rotating shaft to horizontally move and rotate. The multi-station switching function is reserved through linkage of the rotating disc and the supporting mandrel, the mold opening and closing and core pulling functions are reserved through independent movement of the rotating shaft, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, and in particular to a mold clamping mechanism and injection molding equipment. Background Technology

[0002] Currently, the mainstream mold clamping mechanisms are mainly divided into three types: turntable-less rotary shaft type, turntable type, and rotary shaft type, but each has its own functional limitations. The turntable-less rotary shaft type can only achieve basic mold opening and closing actions, suitable for the production of simple single-component plastic parts, but cannot complete multi-station switching or complex core pulling. The turntable type mold clamping mechanism achieves multi-station switching by driving the mold with a turntable, which can meet the needs of sequential molding of multiple components, but lacks an independent rotary shaft drive and cannot adapt to complex plastic parts requiring core pulling. The rotary shaft type mold clamping mechanism has mold opening and closing and core pulling functions, and can handle plastic parts with complex structures such as side holes and threads, but because it lacks a turntable structure, it cannot achieve continuous multi-station production.

[0003] To address the functional limitations of the three types of mold clamping mechanisms mentioned above, a rotary table and rotary shaft composite mold clamping mechanism has emerged in the industry. Its design aims to integrate the core functions of the first three types, retaining the multi-station switching capability of the rotary table while also having the function of driving the mold opening and closing and core pulling via the rotary shaft, in order to adapt to more complex multi-component injection molding scenarios.

[0004] However, existing rotary table-shaft composite mechanisms suffer from functional coupling issues. The rotary table and shaft share a single transmission system, forcing their movements to be interdependent. For example, when the shaft drives mold opening and closing, the rotary table moves synchronously, making it impossible to individually activate or deactivate a specific functional module based on process requirements. This results in numerous redundant movements when producing simple plastic parts, susceptibility to shaft interference when producing multi-station plastic parts, and potential interference from the rotary table's movement when producing complex core-pulling plastic parts. Ultimately, companies still need to configure multiple dedicated machines for different processes, significantly increasing production costs.

[0005] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0006] The purpose of this invention is to provide a mold clamping mechanism and injection molding equipment that eliminates the need for dedicated equipment for different processes, thereby reducing production costs.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A mold clamping mechanism is used to drive a mold to complete multi-component injection molding. The mold includes a fixed mold, a moving mold, and cavities disposed on opposite surfaces of the two. The moving mold has at least two cavities. The mold clamping mechanism includes a carrier, a support mandrel, a turntable, a rotating shaft, and a drive assembly, wherein:

[0009] The supporting spindle is rotatably mounted on the bearing member;

[0010] The turntable is mounted on the support mandrel. The turntable is used to support the moving mold and drives the moving mold to rotate through the support mandrel to switch the cavity.

[0011] The rotating shaft passes through the supporting mandrel and is connected to the moving mold. The rotating shaft can translate relative to the supporting mandrel to drive the moving mold to move closer to / away from the fixed mold to realize the opening and closing of the mold. The rotating shaft can also rotate relative to the supporting mandrel to drive the core-pulling component on the moving mold to move.

[0012] The drive component is disposed on the carrier and is configured to drive the turntable to rotate, and is also configured to drive the rotating shaft to translate and rotate.

[0013] Preferably, the mold clamping mechanism further includes:

[0014] A first transmission component is used to transmit a medium to the core-pulling component;

[0015] The second transmission component is used to transfer the medium to the cavity.

[0016] Preferably, the first transmission component includes a first channel, a first pipeline, a transition assembly, a distribution block, and a water distribution block, wherein:

[0017] The first channel is located inside the rotating shaft;

[0018] One end of the first pipeline is connected to an external medium supply component, and the other end is connected to the first channel through the adapter assembly;

[0019] The distribution block is disposed on the rotating shaft and has a second channel inside, which communicates with the first channel.

[0020] The water distribution block is disposed on the turntable and connected to the second channel through a pipeline. The water distribution block is configured to transfer the medium to the core-pulling component through the second channel.

[0021] Preferably, the adapter assembly includes:

[0022] A flow divider plate is disposed at the end of the rotating shaft away from the moving mold, and has at least two sets of third channels inside, each set of third channels communicating with the first channel.

[0023] The adapter plate is connected to the diverter plate through multiple branch pipes. It has at least two sets of fourth channels inside. One end of each set of fourth channels is connected to the corresponding branch of the first pipe, and the other end is connected to the corresponding third channel through the branch pipe.

[0024] Preferably, the first transmission component further includes:

[0025] The first impact block is disposed on the diverter plate;

[0026] A first limiting block is disposed on the carrier;

[0027] The first impact block cooperates with the first limiting block to limit the maximum rotation range of the rotating shaft by mechanical contact, thereby limiting the angle at which the branch pipe and the first pipe are wound around the adapter plate.

[0028] Preferably, the second transmission component includes a second conduit and a fifth channel, wherein:

[0029] One end of the second pipeline is connected to a component that supplies the external medium;

[0030] The fifth channel is disposed inside the support mandrel and communicates with the second channel. The water distribution block is also configured to transfer the medium to the cavity through the second channel.

[0031] Preferably, the driving component includes a first driving element and a second driving element, wherein:

[0032] The first driving element is configured to drive the turntable to rotate;

[0033] The second drive element is configured to drive the rotating shaft to translate and rotate relative to the supporting spindle.

[0034] Preferably, the first driving component includes a first servo motor, a reducer, and a gear transmission structure. The first servo motor is connected to the reducer, and the first servo motor outputs torque through the output shaft of the reducer. The output shaft drives the turntable to rotate through the gear transmission structure.

[0035] Preferably, the second driving member includes a rotation driving part and a translation driving part;

[0036] The rotary drive unit includes a second servo motor, a first pulley, a second pulley, and a transmission belt. The first pulley is coaxially mounted on the power shaft of the second servo motor, the second pulley is coaxially mounted on the rotating shaft, and the transmission belt is wound around the first pulley and the second pulley.

[0037] The translation drive unit includes a hydraulic cylinder, which is connected to the end of the rotating shaft away from the moving mold. The rotating shaft is driven to translate by the extension and retraction of the piston rod of the hydraulic cylinder.

[0038] An injection molding machine for multi-component injection molding, the injection molding machine including a mold and the above-described mold closing mechanism;

[0039] The mold includes a fixed mold and a movable mold, the fixed mold and the movable mold being arranged opposite each other to form a cavity for molding, and the movable mold having at least two cavities;

[0040] The mold closing mechanism is configured to drive the moving mold to move relative to the fixed mold, so as to realize the opening and closing of the mold, the switching of the cavity position, and the movement of the core pulling component on the moving mold.

[0041] The beneficial effects of this invention are:

[0042] This invention retains the multi-station switching function through the linkage between the turntable and the supporting mandrel, and also retains the mold opening and closing and core pulling functions through the independent movement of the rotating shaft, thereby reducing production costs. Attached Figure Description

[0043] Figure 1 This is a cross-sectional view of the mold clamping mechanism provided by the present invention;

[0044] Figure 2 This is a schematic diagram of the structure of the first impact block and the first limiting block provided by the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of the first transmission component and the second transmission component provided by the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of the first pipeline provided by the present invention when it is wound around the support mandrel;

[0047] Figure 5 This is a schematic diagram of the structure of the second impact block, the second limiting block, and the third limiting block provided by the present invention.

[0048] In the picture:

[0049] 1. Bearing component; 2. Support spindle; 3. Turntable; 4. Rotating shaft; 5. Drive assembly; 51. First drive component; 511. First servo motor; 512. Reducer; 513. Gear transmission structure; 52. Second drive component; 521. Rotary drive unit; 5211. Second servo motor; 5212. Transmission belt; 522. Translation drive unit; 5221. Hydraulic cylinder; 6. First transmission component; 60. First channel; 61. 62. First pipeline; 62. Adapter assembly; 621. Diverter plate; 6211. Third channel; 622. Adapter plate; 6221. Fourth channel; 63. Distribution block; 631. Second channel; 64. Water distribution block; 65. First impact block; 66. First limiting block; 67. Branch pipeline; 78. Second transmission component; 70. Second pipeline; 71. Second impact block; 72. Second limiting block; 73. Third limiting block; 74. Fifth channel. Detailed Implementation

[0050] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0051] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0052] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of one centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0053] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0054] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0055] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0056] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0057] Please see Figures 1 to 5 This embodiment provides a mold closing mechanism for driving a mold to complete multi-component injection molding. The mold includes a fixed mold, a moving mold, and cavities disposed on their opposing surfaces. The moving mold has at least two cavities. The mold closing mechanism includes a carrier 1, a support mandrel 2, a turntable 3, a rotating shaft 4, and a drive assembly 5. The support mandrel 2 is rotatably mounted on the carrier 1. The turntable 3 is disposed on the support mandrel 2 and is used to support the moving mold and drive the moving mold to rotate via the support mandrel 2 to switch cavities. The rotating shaft 4 passes through the support mandrel 2 and is connected to the moving mold. The rotating shaft 4 can translate relative to the support mandrel 2 to drive the moving mold to move closer to / away from the fixed mold to achieve mold opening and closing. The rotating shaft 4 can also rotate relative to the support mandrel 2 to drive the core-pulling component on the moving mold to move. The drive assembly 5 is disposed on the carrier 1 and is configured to drive the turntable 3 to rotate, and is also configured to drive the rotating shaft 4 to translate and rotate.

[0058] With this configuration, under the action of the drive assembly 5, the turntable 3 can rotate via the support spindle 2, thereby driving the moving mold to rotate and achieving multi-station switching of the cavity. The drive assembly 5 can also drive the rotating shaft 4 to translate relative to the support spindle 2, thereby causing the moving mold to move closer to or away from the fixed mold, completing the mold opening and closing action. At the same time, the drive assembly 5 can also drive the rotating shaft 4 to rotate relative to the support spindle 2, thereby driving the core-pulling component on the moving mold to move and realize the core-pulling function.

[0059] Specifically, the support spindle 2 is rotatably mounted on the carrier 1, and the turntable 3 is fixed on the support spindle 2, forming a linkage structure. That is, the turntable 3 can rotate through the support spindle 2 to achieve multi-station switching of the moving mold. The rotating shaft 4 passes through the support spindle 2. In the rotating shaft mode, it is only connected to the moving mold and has no forced mechanical connection with the support spindle 2 or the turntable 3. There is only a spatial through-fit relationship. That is, the rotating shaft 4 can independently complete translation and rotation relative to the support spindle 2. The movement of the support spindle 2 and the turntable 3 will not directly drive the movement of the rotating shaft 4, and vice versa.

[0060] As can be seen from the above, when the rotating shaft 4 translates relative to the supporting mandrel 2 to drive mold opening and closing, or rotates relative to the supporting mandrel 2 to drive core pulling, since the rotating shaft 4 is not forcibly linked with the turntable 3 and the supporting mandrel 2, the turntable 3 will not move synchronously with the rotating shaft 4, thus avoiding the interference problem that may be caused by the turntable 3 moving along with the rotating shaft 4. For example, when producing simple plastic parts, only the rotating shaft 4 needs to independently complete the mold opening and closing action, and the turntable 3 can remain stationary without any extra rotational action; when producing multi-station plastic parts, the rotation of the turntable 3 realizes the station switching, at which time the rotating shaft 4 can remain stationary or independently complete the mold opening and closing / core pulling action of the corresponding station without interference. Thus, the multi-station switching function is retained through the linkage between the turntable 3 and the supporting mandrel 2, and the mold opening and closing and core pulling functions are retained through the independent movement of the rotating shaft 4 relative to the supporting mandrel 2, without the need to configure special equipment for different processes, reducing production costs.

[0061] In this embodiment, a copper sleeve is coaxially mounted inside the support mandrel 2 via screws. The rotating shaft 4 passes through the copper sleeve and smoothly translates along the axis of the support mandrel 2 with the help of the sliding guide effect of the copper sleeve, driving the moving mold to move closer to or away from the fixed mold to achieve mold opening and closing. The power of the drive assembly 5 is transmitted sequentially through a flat key and corresponding transmission structure, ultimately driving the rotating shaft 4 to rotate relative to the support mandrel 2, thereby driving the core-pulling component on the moving mold to move.

[0062] In the existing rotary shaft composite mold clamping mechanism, the medium transmission relies on the internal opening of the shaft 4 and the distribution shaft. Because the processing and assembly accuracy requirements of the distribution shaft are high, the production and maintenance costs increase. Moreover, its service life is easily affected by the cleanliness of the medium and daily maintenance, and it is prone to wear, leakage and other failures, which affect the continuity and stability of production.

[0063] To address the aforementioned issues, the mold closing mechanism further includes a first transmission component 6 and a second transmission component 7. The first transmission component 6 is used to transfer the medium to the core-pulling component. The second transmission component 7 is used to transfer the medium to the mold cavity. This arrangement, with the independently configured first transmission component 6 and second transmission component 7 responsible for media transfer to the core-pulling component and the mold cavity respectively, eliminates the need to rely on a distribution shaft for media exchange. This avoids the increased production and maintenance costs caused by the high precision requirements of the distribution shaft's machining and assembly, thereby contributing to further reductions in production costs.

[0064] Specifically, the first transmission component 6 includes a first channel 60, a first pipe 61, a connecting assembly 62, a distribution block 63, and a water distribution block 64. The first channel 60 is disposed inside the rotating shaft 4. One end of the first pipe 61 is connected to an external medium supply component, and the other end is connected to the first channel 60 via the connecting assembly 62. The distribution block 63 is disposed on the rotating shaft 4 and has a second channel 631 disposed inside, which is connected to the first channel 60. The water distribution block 64 is disposed on the turntable 3 and is connected to the second channel 631 via a pipe. The water distribution block 64 is configured to transfer the medium to the core-pulling component via the second channel 631.

[0065] Understandably, the medium is transferred to the core-pulling component through the coordinated operation of the first channel 60, the first pipe 61, the transition component 62, the distribution block 63, and the water divider 64, replacing the medium transfer function of the distribution shaft in the prior art. Compared to the distribution shaft, the structure of the distribution block 63 being set on the rotating shaft 4 and the water divider 64 being set on the turntable 3 allows for easier control of the precision requirements in the processing and assembly process, reducing production and maintenance costs caused by high precision requirements. At the same time, the wear risk of each component is relatively lower than that of the distribution shaft, and the sealing of the medium transfer path is easier to ensure through routine maintenance, with less impact from medium cleanliness and daily maintenance, reducing equipment downtime caused by wear and leakage, thereby improving the continuity and stability of production.

[0066] In this embodiment, the adapter assembly 62 includes a flow divider plate 621 and an adapter plate 622. The flow divider plate 621 is disposed at the end of the rotating shaft 4 away from the moving mold, and has at least two sets of third channels 6211 inside, each set of third channels 6211 communicating with the first channel 60. The adapter plate 622 is connected to the flow divider plate 621 through multiple branch pipes 67, and has at least two sets of fourth channels 6221 inside. One end of each set of fourth channels 6221 is connected to the corresponding branch of the first pipe 61, and the other end is connected to the corresponding third channel 6211 through the branch pipe 67.

[0067] It is understandable that the flow divider plate 621 has at least two sets of third channels 6211 inside, all of which are connected to the first channel 60 of the rotating shaft 4. The adapter plate 622 is connected to the flow divider plate 621 one by one through multiple branch pipes 67, and has at least two sets of fourth channels 6221 inside to connect to the external medium supply pipes. This can avoid the limitation of the existing technology that only relies on the opening inside the rotating shaft 4, resulting in a limited number of water, oil and circuits. It can significantly increase the number of medium transmission channels, meet the functional requirements of more cooling and core pulling of the mold, and reduce the difficulty of the production process.

[0068] Furthermore, the fourth channel 6221 of the adapter plate 622 and the third channel 6211 of the diverter plate 621 are connected one-to-one via branch pipes 67, making each group of media channels independent of each other. When a group of channels experiences blockage, leakage, or other faults, the corresponding branch pipe 67 can be repaired or replaced separately for that group, without having to disassemble the entire media transfer system, further reducing maintenance difficulty and cost.

[0069] Generally, if the rotation angle of the shaft 4 is unrestricted, the pipeline is prone to breakage due to excessive winding, affecting the safety and smoothness of media transmission. Therefore, the first transmission component 6 also includes a first impact block 65 and a first limiting block 66. The first impact block 65 is disposed on the diverter plate 621. The first limiting block 66 is disposed on the support member 1. The first impact block 65 and the first limiting block 66 cooperate to mechanically limit the maximum rotation range of the shaft 4, thereby limiting the angle at which the branch pipeline 67 and the first pipeline 61 are wound around the adapter plate 622.

[0070] When the rotating shaft 4 drives the diverter plate 621 and the first impact block 65 to rotate to a limited angle, the first impact block 65 and the first limit block 66 form a rigid limit through mechanical contact, forcibly preventing the rotating shaft 4 from continuing to rotate. This mechanical cooperation strictly limits the maximum rotation range of the rotating shaft 4, preventing the branch pipe 67 and the first pipe 61 from being infinitely entangled and pulled due to excessive rotation of the rotating shaft 4, thereby preventing pipe breakage and ensuring the integrity and unobstructed flow of the medium. At the same time, the stable limiting function reduces malfunctions such as leakage and downtime caused by pipe damage, lowers equipment maintenance costs, and improves production continuity.

[0071] In this embodiment, the maximum rotation angle of the rotating shaft 4 and the turntable 3 is set to 270°, which corresponds to the production requirements of a conventional four-station mold. Since the four cavities of the four-station mold are evenly distributed in the circumferential direction and the central angle between adjacent cavities is 90°, rotating the rotating shaft 4 or the turntable 3 by 90° can switch to the next station, and rotating it by 270° can complete all switching operations between the four stations. The first impact block 65 is fixed on the diverter plate 621 and rotates synchronously with the rotating shaft 4. The first limiting block 66 is fixed on the bearing 1 and its position remains fixed. In the initial state, the first impact block 65 and the first limiting block 66 form a 270° angle in the circumferential direction. When the rotating shaft 4 drives the first impact block 65 to rotate to mechanically abut against the first limiting block 66, the rotating shaft 4 completes a 270° rotation. At this time, the rigid cooperation between the two forces the rotating shaft 4 to continue rotating, which not only avoids the branch pipe 67 and the first pipe 61 from breaking due to excessive winding, but also ensures that the rotation angle of the rotating shaft 4 can meet the switching requirements of the four-station mold.

[0072] Accordingly, the second transmission component 7 includes a second pipe 70 and a fifth channel 74. One end of the second pipe 70 is connected to an external medium supply component. The fifth channel 74 is located inside the support mandrel 2. Both ends of the fifth channel 74 are connected to the second pipe 70 and the second channel 631, respectively. The water distribution block 64 is also configured to transfer the medium to the cavity through the second channel 631.

[0073] With this configuration, the externally supplied medium (oil / water) is sequentially connected through the second pipe 70, the fifth channel 74, and the second channel 631, and finally enters the cavity through the water distribution block 64. This forms an independent and parallel medium transfer path with the first channel 60 inside the rotating shaft 4, significantly increasing the number of channels that can transfer the medium to the cavity. This overcomes the limitation of a single opening in the rotating shaft 4 on the number of channels, and can meet the needs of the mold cavity for multiple media in processes such as cooling, reducing the production process difficulty caused by insufficient channels. At the same time, it does not rely on the distribution shaft, but achieves medium transfer through the cooperation of channels and pipes, reducing the impact of failures such as wear and leakage of the distribution shaft on the medium supply to the cavity, and improving the stability of medium transfer.

[0074] It should be noted that in this embodiment, the water distribution block 64 is fixedly mounted on the turntable 3. One end of its structure is connected to the second channel 631 inside the distribution block 63 via a pipeline, while the other end is connected to the core-pulling component and the cavity of the mold. The second channel 631 of the distribution block 63 is connected to both the first channel 60 inside the rotating shaft 4 and the fifth channel 74 inside the supporting mandrel 2. This allows the medium supplied by the external medium component to be delivered to the first channel 60 via the first pipeline 61 and the adapter 62, and the medium transmitted via the fifth channel 74 inside the supporting mandrel 2, to converge at the second channel 631 of the distribution block 63 and be delivered to the water distribution block 64 via the pipeline. The water distribution block 64, through its internal passages, transmits the converged medium to the core-pulling component and the cavity, providing the necessary medium for the operation of the core-pulling component and for the cooling and other processes of the cavity, thereby meeting the driving requirements of the core-pulling component and the process requirements of the cavity. This configuration integrates the media transmission paths from the rotating shaft 4 and the supporting spindle 2 through the water distribution block 64, effectively increasing the number of media channels and breaking through the limitation of the number of media channels by the opening of a single rotating shaft 4 or supporting spindle 2, thus ensuring the stable realization of mold core pulling and cavity-related functions.

[0075] It should also be noted that the water distribution block 64 has at least two independent passages inside. The output end of one passage is connected to the core-pulling component of the mold through a pipe, and the output end of the other passage is connected to the cavity of the mold through a pipe. The input ends of the two passages are connected to the second channel 631 of the distribution block 63 through the same pipe.

[0076] Specifically, the water distribution block 64 achieves media diversion through an internal independent branch structure. After the media from the second channel 631 of the distribution block 63 enters the water distribution block 64, it flows into two sets of internal passages. One set of passages specifically guides the media to the core-pulling component, providing the driving medium for the extension and retraction of the core-pulling component. The other set of passages guides the media to the cavity, providing the medium for processes such as cooling and temperature control of the cavity.

[0077] In terms of control, the media diversion of the water distribution block 64 is achieved through the external media supply component in conjunction with valves. The external media supply component can adjust the type, pressure, or flow rate of the media flowing into the two sets of passages of the water distribution block 64 by controlling the valve opening and closing of the corresponding pipeline according to the injection molding process requirements, so as to ensure that the core pulling action matches the media supply of the cavity process.

[0078] Simultaneously, the water distribution block 64 is linked with the turntable 3, the flow distribution block 63, and the mold. The water distribution block 64 is fixed on the turntable 3 and rotates synchronously with the turntable 3, ensuring that it maintains a pipeline connection with the core-pulling components and cavities of the mold during station switching. Its input end is fixedly connected to the second channel 631 of the flow distribution block 63 through a pipeline, continuously receiving the medium from the rotating shaft 4 and the supporting mandrel 2, thereby achieving a stable supply of medium to the core-pulling components and cavities at different stations.

[0079] To ensure that the rotation angle of the turntable 3 meets the switching requirements of the four-station mold, in this embodiment, the second transmission component 7 further includes a second impact block 71, a second limiting block 72, and a third limiting block 73. The second impact block 71 is fixed to the turntable 3 and rotates synchronously with it. The second limiting block 72 and the third limiting block 73 are both fixed to the carrier 1 and are spaced apart along the rotation trajectory of the turntable 3. When the turntable 3 rotates to the preset station, the second impact block 71 rotates with the turntable 3. If the rotation angle reaches 270°, the second impact block 71 will mechanically abut against the third limiting block 73, forcibly restricting the turntable 3 from continuing to rotate. When the turntable 3 rotates in the opposite direction to near the initial position, the second impact block 71 can abut against the second limiting block 72 to achieve reverse limiting. At the same time, the support mandrel 2 is provided with a clearance structure near the pipe joint, which is a groove shape adapted to the joint size. This is used to clear the pipe joint when the turntable 3 rotates to 270°, avoiding frictional interference between the joint and the support mandrel 2.

[0080] To avoid wasting power, the drive assembly 5 includes a first drive member 51 and a second drive member 52. The first drive member 51 is configured to drive the turntable 3 to rotate. The second drive member 52 is configured to drive the rotating shaft 4 to translate and rotate relative to the supporting spindle 2.

[0081] In this configuration, the first drive component 51 drives the turntable 3 to rotate, while the second drive component 52 drives the rotating shaft 4 to translate and rotate relative to the supporting spindle 2. The two power systems are independent of each other and have no forced linkage. When only the rotating shaft 4 needs to perform mold opening / closing or core pulling actions, the second drive component 52 can drive the rotating shaft 4 independently, while the first drive component 51 remains stationary, preventing the turntable 3 from moving and avoiding redundant power consumption, thus achieving energy saving. When only the turntable 3 needs to perform station switching, the first drive component 51 drives the turntable 3 to rotate independently, while the second drive component 52 keeps the rotating shaft 4 stationary, avoiding interference from the rotating shaft 4's movement on station switching. Simultaneously, the independent drive structure simplifies the transmission path and reduces the complexity of installation and subsequent maintenance.

[0082] More importantly, the independently configured first drive unit 51 and second drive unit 52 can respectively call the functions of turntable 3 or shaft 4, which is compatible with the process requirements of turntable-less shaft type, turntable and shaft type mold closing mechanism, without the need to configure special equipment for different processes, further reducing equipment costs.

[0083] Specifically, the first driving component 51 includes a first servo motor 511, a reducer 512, and a gear transmission structure 513. The first servo motor 511 is connected to the reducer 512. The first servo motor 511 outputs torque through the output shaft of the reducer 512. The output shaft drives the turntable 3 to rotate through the gear transmission structure 513.

[0084] Understandably, the first servo motor 511 is used as the power source, and it has a fast response speed and high control precision. It can accurately control the rotation angle and speed of the turntable 3 to meet the requirements for station positioning accuracy when switching between multiple workstations.

[0085] It is also understandable that the reducer 512, in conjunction with the first servo motor 511, can reduce the output speed of the first servo motor 511 and increase its output torque, ensuring stable and sufficient power when driving the turntable 3 and the mold it carries, thus avoiding transmission lag caused by excessive load. The gear transmission structure 513 has the characteristics of high transmission efficiency and stable transmission ratio, which can smoothly transmit the torque output by the reducer 512 to the turntable 3, reducing energy loss and position deviation during transmission, ensuring the smoothness of the turntable 3's rotation and the accuracy of station switching, further improving the stability and reliability of equipment operation, and meeting the process requirements of high-precision injection molding production.

[0086] It should be noted that the specific structure and working principle of the first servo motor 511, the reducer 512 and the gear transmission structure 513 are all existing technologies. The specific structure can be designed according to the actual application scenario, so it will not be described in detail.

[0087] Additionally, the second driving component 52 includes a rotary driving unit 521 and a translational driving unit 522. The rotary driving unit 521 includes a second servo motor 5211, a first pulley, a second pulley, and a transmission belt 5212. The first pulley is coaxially mounted on the power shaft of the second servo motor 5211, and the second pulley is coaxially mounted on the rotating shaft 4. The transmission belt 5212 is wound around the first and second pulleys. The translational driving unit 522 includes a hydraulic cylinder 5221, which is connected to the end of the rotating shaft 4 furthest from the moving mold. The piston rod of the hydraulic cylinder 5221 extends and retracts to drive the rotating shaft 4 to translate.

[0088] In the rotary drive unit 521, the second servo motor 5211 drives the rotating shaft 4 to rotate through the first pulley, the transmission belt 5212, and the second pulley. The high precision of the second servo motor 5211 can accurately control the rotation angle of the rotating shaft 4 (such as the angle accuracy of the core pulling action). The pulley drive structure has smooth transmission and high efficiency, which can meet the power transmission requirements when the rotating shaft 4 rotates.

[0089] In the translation drive unit 522, a hydraulic cylinder 5221 is connected to the rotating shaft 4. The rotating shaft 4 is driven to translate by the extension and retraction of the piston rod. The hydraulic cylinder 5221 outputs a stable force, which can meet the load requirements when the moving mold is opened and closed. It also responds quickly and is suitable for the rapid switching of mold opening and closing actions.

[0090] Therefore, the two are set up independently, allowing the rotation and translation of the rotating shaft 4 to be controlled separately without interference. When only core pulling is required, the rotary drive unit 521 operates independently. When only mold opening and closing are required, the translation drive unit 522 operates independently. When multiple actions are required, the two can operate in tandem, avoiding the action binding problem caused by sharing power, and ensuring the accuracy and reliability of core pulling and mold opening and closing actions through the high precision of the second servo motor 5211 and the stable output of the hydraulic cylinder 5221. In addition, in conjunction with the independent drive system of the turntable 3, the independence and energy efficiency of the entire machine's operation are further realized, meeting the needs of multi-component injection molding for complex actions.

[0091] It should be noted that the specific structure and working principle of the second servo motor 5211, the first pulley, the second pulley, the transmission belt 5212, and the hydraulic cylinder 5221 are all existing technologies. The specific structure can be designed according to the actual application scenario, so it will not be described in detail.

[0092] This embodiment also provides an injection molding apparatus for multi-component injection molding. The injection molding apparatus includes a mold and the aforementioned mold closing mechanism. The mold includes a fixed mold and a moving mold, which are arranged opposite to each other to form cavities for molding. The moving mold has at least two cavities. The mold closing mechanism is configured to drive the moving mold to move relative to the fixed mold, thereby realizing the opening and closing of the mold, the switching of the cavity positions, and the movement of the core-pulling components on the moving mold.

[0093] Understandably, injection molding equipment utilizes a mold clamping mechanism to achieve stable mold opening and closing, precise cavity switching, and reliable operation of core-pulling components on the moving mold, adapting to multi-component injection molding needs. Because the mold clamping mechanism can flexibly drive the moving mold relative to the fixed mold, combined with the multi-cavity design of the mold, the equipment can complete multi-component, multi-station injection molding in a single production cycle, improving production efficiency. Simultaneously, the structural design of the mold clamping mechanism ensures the coordination and stability of mold opening and closing, station switching, and core-pulling actions, reducing product defects caused by coordination issues and helping to ensure the quality consistency of multi-component injection molded products. Furthermore, this equipment is compatible with different process requirements, eliminating the need for separate equipment for different molding processes, reducing production input costs, and improving the overall utilization rate of the equipment.

[0094] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mold clamping mechanism for driving a mold to complete multi-component injection molding, the mold comprising a fixed mold, a movable mold, and cavities disposed on opposite surfaces of the two, wherein the movable mold has at least two cavities, characterized in that, The mold clamping mechanism includes a carrier (1), a support spindle (2), a turntable (3), a rotating shaft (4), and a drive assembly (5), wherein: The supporting spindle (2) is rotatably mounted on the bearing member (1); The turntable (3) is mounted on the support spindle (2). The turntable (3) is used to carry the moving mold and drive the moving mold to rotate through the support spindle (2) to switch the cavity. The rotating shaft (4) passes through the supporting spindle (2) and is connected to the moving mold. The rotating shaft (4) can translate relative to the supporting spindle (2) to drive the moving mold to move closer to / away from the fixed mold to realize the opening and closing of the mold. The rotating shaft (4) can also rotate relative to the supporting spindle (2) to drive the core-pulling component on the moving mold to move. The drive assembly (5) is disposed on the carrier (1) and is configured to drive the turntable (3) to rotate, and is also configured to drive the rotating shaft (4) to translate and rotate.

2. The mold clamping mechanism according to claim 1, characterized in that, The mold clamping mechanism further includes: The first transmission component (6) is used to transmit the medium to the core-pulling component; The second transmission component (7) is used to transmit the medium to the cavity.

3. A mold clamping mechanism according to claim 2, characterized in that, The first transmission component (6) includes a first channel (60), a first pipeline (61), a transition assembly (62), a distribution block (63), and a water distribution block (64), wherein: The first channel (60) is disposed inside the rotating shaft (4); One end of the first pipeline (61) is connected to the component that supplies the external medium, and the other end is connected to the first channel (60) through the adapter assembly (62); The distribution block (63) is disposed on the rotating shaft (4) and has a second channel (631) inside, which is connected to the first channel (60); The water distribution block (64) is disposed on the turntable (3) and connected to the second channel (631) through a pipeline. The water distribution block (64) is configured to transfer the medium to the core-pulling component through the second channel (631).

4. A mold clamping mechanism according to claim 3, characterized in that, The adapter component (62) includes: The flow divider plate (621) is located at the end of the rotating shaft (4) away from the moving mold, and has at least two sets of third channels (6211) inside, each set of third channels (6211) being connected to the first channel (60); The adapter plate (622) is connected to the diverter plate (621) through multiple branch pipes (67). It has at least two sets of fourth channels (6221) inside. One end of each set of fourth channels (6221) is connected to the corresponding branch of the first pipe (61), and the other end is connected to the corresponding third channel (6211) through the branch pipes (67).

5. A mold clamping mechanism according to claim 4, characterized in that, The first transmission component (6) further includes: The first impact block (65) is disposed on the diverter plate (621); The first limiting block (66) is disposed on the bearing member (1); The first impact block (65) cooperates with the first limiting block (66) to limit the maximum rotation range of the rotating shaft (4) by mechanical contact, so as to limit the angle of the branch pipe (67) and the first pipe (61) wrapped around the adapter plate (622).

6. A mold clamping mechanism according to claim 3, characterized in that, The second transmission component (7) includes a second conduit (70) and a fifth channel (74), wherein: One end of the second pipeline (70) is connected to a component that supplies the external medium; The fifth channel (74) is disposed inside the support mandrel (2), and the fifth channel (74) is connected to the second channel (631). The water distribution block (64) is also configured to transfer the medium to the cavity through the second channel (631).

7. A mold clamping mechanism according to claim 1, characterized in that, The drive assembly (5) includes a first drive element (51) and a second drive element (52), wherein: The first drive member (51) is configured to drive the turntable (3) to rotate; The second drive member (52) is configured to drive the rotating shaft (4) to translate and rotate relative to the supporting spindle (2).

8. A mold clamping mechanism according to claim 7, characterized in that, The first driving component (51) includes a first servo motor (511), a reducer (512), and a gear transmission structure (513). The first servo motor (511) is connected to the reducer (512) in a transmission connection. The first servo motor (511) outputs torque through the output shaft of the reducer (512). The output shaft drives the turntable (3) to rotate through the gear transmission structure (513).

9. A mold clamping mechanism according to claim 7, characterized in that, The second driving member (52) includes a rotation driving part (521) and a translation driving part (522); The rotary drive unit (521) includes a second servo motor (5211), a first pulley, a second pulley, and a transmission belt (5212). The first pulley is coaxially mounted on the power shaft of the second servo motor (5211), the second pulley is coaxially mounted on the rotating shaft (4), and the transmission belt (5212) is wound around the first pulley and the second pulley. The translation drive unit (522) includes a hydraulic cylinder (5221), which is connected to the end of the rotating shaft (4) away from the moving mold. The rotating shaft (4) is driven to translate by the extension and retraction of the piston rod of the hydraulic cylinder (5221).

10. An injection molding machine for multi-component injection molding, characterized in that, The injection molding equipment includes a mold and a mold closing mechanism as described in any one of claims 1-9; The mold includes a fixed mold and a movable mold, the fixed mold and the movable mold being arranged opposite each other to form a cavity for molding, and the movable mold having at least two cavities; The mold closing mechanism is configured to drive the moving mold to move relative to the fixed mold, so as to realize the opening and closing of the mold, the switching of the cavity position, and the movement of the core pulling component on the moving mold.

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