Injection molding machine mold change system

Abstract

The application relates to the technical field of injection molding processing, and in particular relates to an injection molding machine mold replacement system. The system comprises a movable mold replacement platform, a driving unit, a magnetic fixing device, a positioning device and a control unit. The mold replacement platform can simultaneously carry at least two molds, the driving unit is responsible for driving the platform to move and transferring the molds between the platform and an injection molding machine template, the magnetic fixing device quickly adsorbs or releases the molds through magnetic force, the positioning device obtains position information in real time, and the control unit cooperatively controls the actions of the components based on the position information. Through synchronous processing of double molds, quick fixing through magnetic force and closed-loop position control, the application realizes full automation of the mold replacement process, significantly shortens the mold replacement time, greatly improves the mold replacement efficiency, precision and operation safety, and effectively meets the demand of modern high-efficiency production.

Description

Technical Field

[0001] This application relates to the field of injection molding technology, and in particular to an injection molding machine mold changing system. Background Technology

[0002] Injection molding is a key process in the production of plastic products, widely used in the automotive, electronics, and consumer goods industries. In modern manufacturing, to adapt to the trend of multi-variety, small-batch production, injection molding machines need to frequently change molds, making mold change efficiency a key factor affecting overall production efficiency and cost.

[0003] Currently, traditional mold changing methods for injection molding machines generally rely on manual operation. The entire process typically involves multiple sequential steps, including equipment shutdown, manual disassembly of the old mold, hoisting and positioning of the new mold, installation, and debugging. This method has several significant drawbacks: First, the entire mold changing process is too time-consuming, especially since mold positioning and securing heavily depend on the operator's experience, resulting in low equipment utilization. Second, manually handling and precisely positioning heavy molds not only poses safety risks but also makes it difficult to ensure consistency in mold changing positions each time, thus affecting the stability of production quality.

[0004] Therefore, existing injection molding machine mold changing technologies are insufficient in terms of efficiency, precision, and safety, making it difficult to meet the demands of modern, high-efficiency production. There is an urgent need to develop an automated, high-precision mold changing system to significantly shorten mold changing time, reduce reliance on manual labor, and improve the reliability and safety of production preparation. Utility Model Content

[0005] To address one or more of the aforementioned technical problems, this application provides an injection molding machine mold changing system, comprising: The movable mold-changing platform is configured to support at least two molds simultaneously. The drive unit is configured to drive the mold changing platform to move and drive the mold to move into or out of the injection molding machine; A magnetic fixing device is installed on the moving platen, fixed platen, and intermediate plate of an injection molding machine, and is configured to selectively attract and fix or release the mold by magnetic force. A positioning device is configured to acquire position information of the mold changing platform and the mold; and The control unit is signal-connected to the drive unit, the magnetic fixing device, and the positioning device, respectively. The control unit is configured to: Based on the position information obtained by the positioning device, the drive unit is controlled to perform the mold insertion and removal operations; And control the magnetic fixing device to perform the corresponding adsorption fixing or release operation.

[0006] According to the injection molding machine mold changing system provided in this application, the driving unit includes a first driving mechanism, the first driving mechanism includes a track and a platform driving motor, the mold changing platform is slidably disposed on the track, the platform driving motor is drivenly connected to the mold changing platform and is configured to drive the mold changing platform to move along the track.

[0007] According to the injection molding machine mold changing system provided in this application, the driving unit includes a second driving mechanism, the second driving mechanism includes at least four sets of driving rollers and roller driving motors, the driving rollers are respectively disposed on the moving platen, the fixed platen and the intermediate plate, and the roller driving motors are configured to drive the driving rollers to rotate in order to transfer the mold into or out of the injection molding machine.

[0008] According to the injection molding machine mold changing system provided in this application, the second drive mechanism further includes a driven roller, which is disposed on the mold changing platform.

[0009] The injection molding machine mold changing system provided in this application also includes a mold information identification module, which is configured to acquire the mold's identity information and mold thickness parameters; the control unit is signal-connected to the mold information identification module.

[0010] According to the injection molding machine mold changing system provided in this application, the control unit is further configured to: control the position of the injection molding machine adjusting template and intermediate plate based on the acquired mold thickness parameters, so as to form a suitable mold space.

[0011] According to the injection molding machine mold changing system provided in this application, the positioning device includes a laser positioning module, which is configured to detect the position of the mold changing platform in real time.

[0012] According to the injection molding machine mold changing system provided in this application, the positioning device further includes a first detection sensor, which is arranged on the moving path of the mold and configured to detect whether the mold has reached the preset moving position.

[0013] According to the injection molding machine mold changing system provided in this application, the positioning device further includes a second detection sensor, which is arranged on the moving path of the mold and configured to detect whether the mold has reached a preset exit position.

[0014] The injection molding machine mold changing system provided in this application further includes a limiting mechanism, which includes at least one of the following: The platform limiting block is protruding on the bearing surface of the mold changing platform and is configured to guide and limit the placement position of the mold; A horizontal locking device is provided on the moving platen and the fixed platen, and is configured to perform a horizontal locking action to fix the mold after the mold is moved into the injection molding machine; A pneumatic limiting device is provided on the upper part of the operating side of the moving template, the fixed template and the intermediate plate, and is configured to extend after the mold is attracted and fixed by the magnetic fixing device to prevent the mold from tipping over. A mechanical limit block is fixedly installed on the non-operation side of the moving template and the fixed template, and is configured to limit the extreme position of the mold movement.

[0015] The above-mentioned one or more technical solutions provided in this application include at least the following technical effects: The injection molding machine mold changing system of this application significantly improves mold changing efficiency, effectively solving the pain points of traditional mold changing that rely on manual serial operation and is time-consuming. The system adopts a dual-station mold changing platform, which can simultaneously carry at least two molds. Combined with the dual-drive mechanism of the drive unit—the first drive mechanism uses a track and platform drive motor to smoothly move the mold changing platform to the injection molding machine's working area, and the second drive mechanism uses the cooperation of drive rollers and driven rollers to move both molds in and out—this completely changes the traditional waiting mode of single mold changing and reduces the downtime of the injection molding machine due to mold changing. Simultaneously, the mold information recognition module can automatically obtain the mold's identity information and mold thickness parameters. Based on this, the control unit can quickly adjust the position of the moving platen and the intermediate plate without manual measurement to form a suitable mold space, avoiding the time-consuming and error-prone manual operation, significantly shortening the traditional hour-level mold changing time, and significantly improving the effective utilization rate of the injection molding machine.

[0016] Secondly, the system significantly improves mold changing accuracy and mold operation stability through multi-dimensional precise control and stable fixing design. The positioning device constructs a complete positioning system: the laser positioning module moves synchronously with the mold changing platform, detects the platform position in real time and feeds it back to the control unit to ensure the platform stops accurately; the first detection sensor accurately identifies the endpoint position of the mold moving in and out, avoiding over-rushing or under-positioning of the mold. The magnetic fixing device uses four sets of magnetic templates corresponding to the fixed template, moving template and the two sides of the intermediate plate respectively. Through double-sided adsorption, a closed magnetic circuit circulation is formed. Compared with traditional mechanical mold locking, it not only has a more uniform adsorption force, which can firmly fix the mold to prevent displacement, but also has the advantages of fast response speed and no mechanical wear. It can maintain a stable fixing effect even after long-term use. In addition, the horizontal locking device of the limiting mechanism provides additional horizontal limiting, and the pneumatic limiting device extends after the mold is fixed to prevent tipping, further ensuring the positional accuracy of the mold during transfer and injection molding, and effectively improving the dimensional consistency of injection molded products.

[0017] Finally, the system also boasts significant advantages in safety and automation, effectively reducing reliance on manual labor and operational risks. The control unit, drive unit, magnetic fixing device, and positioning device form a closed-loop control system, requiring no manual intervention throughout the process. This avoids the risk of workplace injuries that may arise from manually handling heavy molds, while also minimizing the impact of human error on mold changing performance. The mechanical limit blocks of the limiting mechanism are fixed to the non-operating sides of the moving and fixed templates, restricting the mold's movement to extreme positions and preventing collisions between the mold and templates due to drive deviations. The support frame of the mold changing platform, along with the first and second support plates, enhances the platform's load-bearing rigidity, preventing platform edges from sagging during mold transfer.

[0018] In addition, the system's automated design is also reflected in automatic mold information reading, automatic mold space adjustment, and automatic mold fixing and release. Even when facing the production needs of multiple varieties and small batches, it can quickly respond to mold changes, improve production flexibility, and ensure long-term operational reliability, providing strong support for efficient, precise and safe injection molding production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the injection molding machine mold changing system provided in some embodiments of this application; Figure 2 This is a schematic diagram of the control structure of an injection molding machine mold changing system provided in some embodiments of this application; Figure 3 This is a schematic diagram of the intermediate plate structure of the injection molding machine mold changing system provided in some embodiments of this application; Figure 4 This is a schematic diagram of the fixed template structure of the injection molding machine mold changing system provided in some embodiments of this application; Figure 5 This is a schematic diagram of the moving template structure of an injection molding machine mold changing system provided in some embodiments of this application; Figure 6 This is a schematic diagram of the mold changing platform structure of an injection molding machine mold changing system provided in some embodiments of this application.

[0021] Figure label: 1. Injection molding machine; 11. Fixed mold plate; 12. Moving mold plate; 13. Intermediate plate; 14. First mold; 15. Second mold; 100. Mold changing platform; 110. Support frame; 120. First support plate; 130. Second support plate; 200. Drive unit; 210. Track; 220. Platform drive motor; 230. Drive roller; 231. First drive roller group; 232. Second drive roller group; 233. Third drive roller group; 234. Fourth drive roller group; 240. Roller drive motor; 241. First roller drive motor; 242. Second roller drive motor; 243. Third roller drive motor; 244. Fourth roller drive motor; 250. Driven roller; 251. First driven roller group; 252. Second driven roller group; 300. Magnetic fixing device; 310. First magnetic template; 320. Second magnetic template; 330. Third magnetic template; 340. Fourth magnetic template; 400. Positioning device; 410. Laser positioning module; 420. First detection sensor; 430. Second detection sensor; 500, Control Unit; 600. Mold Information Recognition Module; 700 Limiting mechanism; 710 Platform limiting block; 720 Horizontal locking device; 730 Pneumatic limiting device; 740 Mechanical limiting block. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The following is combined Figures 1-6 This application describes an injection molding machine mold changing system.

[0027] The injection molding machine mold changing system provided in this application aims to solve the problems of low efficiency, complex operation, and insufficient positioning accuracy in traditional injection molding machine mold changing processes. Through an integrated mechanical structure and automated control logic, it achieves rapid mold changing and stable fixation. (See reference...) Figure 1 and Figure 2 The system is mainly composed of a movable mold changing platform 100, a drive unit 200, a magnetic fixing device 300, a positioning device 400, a control unit 500, and the moving template 12, the fixed template 11, and the intermediate plate 13 of the injection molding machine 1 itself. The components cooperate with each other to form a complete automated mold changing system.

[0028] The mold changing platform 100, as the core of mold support, is made of high-strength alloy material. Its overall structure is designed to be lightweight to reduce moving load while ensuring sufficient load-bearing capacity. It can stably support at least two molds, so that in one mold changing operation, the two molds to be changed or the used mold can be moved out at the same time. This greatly reduces the waiting time in the traditional single mold changing process and significantly improves mold changing efficiency.

[0029] The drive unit 200 performs a dual drive function: on the one hand, it drives the mold changing platform 100 to move along a preset path; on the other hand, it drives the mold to move in and out between the mold changing platform 100 and the mold platen of the injection molding machine 1. Its power output is precisely calibrated to ensure smooth start-up and stop and uniform speed movement of the mold changing platform 100, preventing the mold from shifting on the bearing surface due to vibration. Simultaneously, when driving the mold to move, it can automatically adjust the driving torque according to the weight of the mold, ensuring that the mold will not stop due to insufficient power or cause impact due to excessive power during the transfer process. This dual drive capability makes the displacement operation during mold changing more seamless and reduces the time loss caused by switching between different drive devices.

[0030] Magnetic fixing devices 300 are respectively installed on the fixed platen 11, moving platen 12, and intermediate plate 13 of the injection molding machine 1. Their core utilizes a structure combining high-performance permanent magnet materials and electromagnetic control, enabling rapid switching between adsorption and release states via commands from the control unit 500. In the adsorption state, the magnetic fixing device 300 generates a uniform and strong magnetic force, ensuring the mold adheres tightly to the corresponding platen surface, preventing displacement or loosening of the mold during injection molding due to clamping forces. In the release state, the magnetic force quickly dissipates, avoiding obstruction of mold removal. Compared to traditional mechanical clamping structures, this magnetic fixing method eliminates complex mechanical insertion and removal actions, has a shorter response time, and avoids mechanical wear from long-term use, significantly improving the efficiency and reliability of fixing and releasing operations.

[0031] The positioning device 400 is key to the system's precise control. It acquires the position information of the mold changing platform 100 and the mold in real time through various detection methods. This position information is transmitted to the control unit 500 in real time, providing precise triggering basis for the actions of the drive unit 200 and the magnetic fixing device 300, effectively avoiding problems such as mold collision or insecure fixing caused by positional deviation.

[0032] The control unit 500, acting as the system's central hub, forms a closed-loop control system with the drive unit 200, magnetic fixing device 300, and positioning device 400 via wired signal connections. It receives position information from the positioning device 400 in real time and sends action commands to the drive unit 200 according to preset control logic. For example, when the mold changing platform 100 is detected moving to the working area of ​​the injection molding machine 1 and aligning with the mold platen position, the control unit 500 instructs the drive unit 200 to initiate the mold transfer program, precisely delivering the mold to be replaced into the injection molding machine 1. When the positioning device 400 reports that the mold has reached the fixed position of the corresponding mold platen, the control unit 500 immediately controls the magnetic fixing device 300 to initiate the adsorption operation, ensuring the mold is fixed in a very short time. Conversely, when a mold needs to be replaced, the control unit 500 first instructs the magnetic fixing device 300 to release the mold, and then, based on the real-time feedback from the positioning device 400, controls the drive unit 200 to smoothly move the mold to the mold changing platform 100. The entire process requires no manual intervention, improving the automation level of mold changing and reducing the risk of errors caused by human operation.

[0033] Through the coordinated operation of the above components, the injection molding machine mold changing system can achieve rapid, accurate and safe mold replacement. Compared with traditional mold changing methods, it not only significantly shortens the mold changing time, but also improves the stability and reliability of the mold changing process. It is especially suitable for batch production scenarios that require frequent mold changes, and provides strong support for the efficient operation of injection molding production.

[0034] In some embodiments, see Figure 1 To achieve simultaneous bearing and synchronous transfer of at least two molds, reduce downtime of injection molding machine 1 due to mold replacement, and improve production efficiency, the mold changing platform 100 is a dual-station mold changing platform. The first mold 14 and the second mold 15 can be placed on the dual-station mold changing platform 100. The two stations are arranged at intervals along the length or width of the mold changing platform 100 to form independent and non-interfering mold bearing areas, ensuring that the first mold 14 and the second mold 15 will not interfere with each other due to overlapping positions after placement. At the same time, it also provides a structural basis for the subsequent drive unit 200 to drive the two molds to move synchronously into or out of injection molding machine 1.

[0035] In some embodiments, see Figure 1 and Figure 3The mold changing platform 100 includes a support frame 110, which is mounted on the operating side of the intermediate plate 13 of the injection molding machine 1. This mounting position provides a reliable mounting base for the support frame 110, while the operating side has relatively ample space, ensuring that it does not interfere with the mold opening and closing actions of the injection molding machine 1 or the operation of other components. The function of the support frame 110 is to provide stable support for the mold changing platform 100. That is, after the mold changing platform 100 moves to the appropriate working position, it can be placed on the support frame 110, thereby preventing the mold changing platform 100 from sagging or vibrating in the middle when bearing the weight of at least two molds, thus ensuring the positional accuracy and operational safety during mold movement.

[0036] In some embodiments, see Figure 1 , Figure 4 and Figure 5 The mold changing platform 100 includes a first support plate 120 and a second support plate 130. The first support plate 120 is disposed on the side of the fixed template 11, and the second support plate 130 is disposed on the side of the moving template 12. The core function of these two support plates is to provide additional support for both ends of the mold changing platform 100. Especially when the mold changing platform 100 carries the mold to the working area of ​​the injection molding machine 1 and docks with the fixed template 11 and the moving template 12, the mold changing platform 100 can overlap the support frame 110, the first support plate 120 and the second support plate 130, which can effectively enhance the structural rigidity of the edge area of ​​the mold changing platform 100, avoid the edge sagging caused by the platform ends being suspended or the weight of the mold being too large, and ensure that the bearing surface of the mold changing platform 100 always remains horizontal, laying the foundation for the smooth transfer of the mold between the platform and the template.

[0037] In some embodiments, see Figure 6 The drive unit 200 includes a first drive mechanism, which provides power and guidance for the displacement of the mold changing platform 100. Its core components are the track 210 and the platform drive motor 220. The mold changing platform 100 is slidably disposed on the track 210. The platform drive motor 220 is connected to the mold changing platform 100 in a transmission manner to drive the mold changing platform 100 to move along the track 210 to meet the position requirements of the mold changing platform 100 docking with the working area of ​​the injection molding machine 1.

[0038] The track 210 is arranged along the preset moving path of the mold changing platform 100. Its main functions include two aspects: firstly, providing motion guidance for the mold changing platform 100 by limiting its movement direction through its own structural constraints, ensuring that the mold changing platform 100 always moves in a straight line, and avoiding misalignment with the injection molding moving template 12 and stationary template 11 due to deviations in the movement direction; secondly, providing load-bearing support for the mold changing platform 100. The track 210 is made of industrial alloy material with high strength and structural stability, capable of bearing the combined weight of the mold changing platform 100 and at least two molds it supports, preventing the mold changing platform 100 from sinking or deforming due to load during movement. The sliding fit between the mold changing platform 100 and the track 210 can adopt conventional sliding fit methods in the art, which will not be elaborated upon in this application.

[0039] The platform drive motor 220 provides power for the movement of the mold changing platform 100. It is installed on the side or bottom of the mold changing platform 100 and is connected to the mold changing platform 100 through a transmission structure. The specific form of the transmission structure can also adopt conventional technical means in this field, and will not be described in detail here. The platform drive motor 220 can adjust its speed and rotation direction according to the instructions of the control unit 500, thereby controlling the moving speed and moving direction of the mold changing platform 100: it accelerates slowly when starting to avoid instantaneous impact force causing the mold to shift on the mold changing platform 100; it decelerates gradually when stopping to ensure that the mold changing platform 100 stops smoothly at the preset position to meet the accuracy requirements of subsequent mold and injection molding machine 1 template alignment.

[0040] In some embodiments, see Figure 1 , Figures 3 to 5 The drive unit 200 includes a second drive mechanism, the core of which consists of drive rollers 230 and roller drive motors 240, used to adapt to the synchronous transfer requirements of the two molds. The drive rollers 230 include at least four sets, namely the first drive roller set 231, the second drive roller set 232, the third drive roller set 233, and the fourth drive roller set 234. Their installation positions precisely correspond to the load-bearing paths of the two molds. The first drive roller set 231 is set at the bottom of the fixed template 11, the second drive roller set 232 and the third drive roller set 233 are respectively set at the bottom of both sides of the intermediate plate 13, and the fourth drive roller set 234 is set at the bottom of the moving template 12. These four sets of rollers are divided into two sets of cooperating units according to the load-bearing requirements. The first drive roller group 231 and the second drive roller group 232 form a first cooperating unit for cooperating to support and drive the first mold 14; the third drive roller group 233 and the fourth drive roller group 234 form a second cooperating unit for cooperating to support and drive the second mold 15. The two groups of units work independently to avoid mutual interference when the two molds are transferred.

[0041] To ensure stable support and continuous drive of the mold throughout its movement into the injection molding machine 1, the second drive roller assembly 232 and the third drive roller assembly 233 are mounted on the support frame 110. These two sets of rollers, originally located at the bottom sides of the intermediate plate 13, extend to the support frame 110 to coordinate with the support frame's support function for the mold changing platform 100. Correspondingly, the first drive roller assembly 231, used to support the first mold in conjunction with the fixed platen 11, extends to the first support plate 120 located on the side of the fixed platen 11; the fourth drive roller assembly 234, used to support the second mold in conjunction with the moving platen 12, extends to the second support plate 130 located on the side of the moving platen 12. This extended design means that the four sets of drive rollers are no longer limited to a local area at the bottom of the mold plate, but are supported by the support frame 110, the first support plate 120, and the second support plate 130, covering the entire starting point of the mold's movement from the mold changing platform 100 to the injection molding machine 1, thus completely avoiding the problem of the mold being suspended or sinking due to detachment from the roller support in the initial stage of the transfer.

[0042] The support frame 110 itself provides basic support for the mold changing platform 100. With the second drive roller group 232 and the third drive roller group 233 extended onto it, when the mold begins to move from the bearing surface of the mold changing platform 100 into the injection molding machine 1, its bottom immediately contacts the rollers on the support frame 110. Simultaneously, it works in conjunction with the first drive roller group 231 on the first support plate 120 or the fourth drive roller group 234 on the second support plate 130, forming initial support and drive at both ends. This connection between initial support and drive allows the mold to move smoothly into the injection molding machine 1 directly under the drive of the rollers without experiencing a supportless transition phase after leaving the mold changing platform 100. As the mold continues to move in, once the mold body enters the injection molding machine 1, the first drive roller group 231 and the second drive roller group 232 will form a first mating unit, continuing to drive the first mold to move towards the preset position between the fixed platen 11 and the intermediate plate 13; the third drive roller group 233 and the fourth drive roller group 234 will form a second mating unit, driving the second mold to move towards the preset position between the intermediate plate 13 and the moving platen 12. Throughout the process, the rollers maintain support and drive for the mold, ensuring that the mold always reaches the corresponding position smoothly and steadily along the preset path.

[0043] This structure, featuring grouped support and full-path extension, precisely adapts to the requirement of simultaneous transfer of two molds, ensuring continuous support for both molds on their independent paths and preventing interference or uneven support during synchronous transfer. Furthermore, the dual-end support design of each coordinating unit for a single mold ensures balanced force distribution during transfer, effectively preventing tilting or displacement caused by unilateral force or lack of support. This is especially beneficial for heavier molds, as balanced support significantly reduces localized friction loss between the mold bottom and the rollers. Simultaneously, the full-path roller extension design keeps the mold's position controllable throughout the transfer process, providing a stable foundation for the subsequent magnetic fixing device to precisely adsorb the mold. This reduces the probability of mold alignment deviation and further enhances the safety and reliability of the entire mold-changing process.

[0044] In some embodiments, see Figures 3 to 5 To accommodate the independent driving requirements of the four sets of drive rollers 230, four roller drive motors 240 are also configured: a first roller drive motor 241, a second roller drive motor 242, a third roller drive motor 243, and a fourth roller drive motor 244. The first roller drive motor 241 is mounted on the first support plate 120, the second roller drive motor 242 and the third roller drive motor 243 are mounted on both sides of the support frame 110, and the fourth roller drive motor 244 is mounted on the second support plate 130.

[0045] These four motors form a one-to-one transmission connection with the four sets of drive rollers 230. Specifically, the first roller drive motor 241 drives the first drive roller set 231, the second roller drive motor 242 drives the second drive roller set 232, the third roller drive motor 243 drives the third drive roller set 233, and the fourth roller drive motor 244 drives the fourth drive roller set 234. This one-to-one correspondence layout design avoids the problem of inconsistent speeds that may occur when multiple sets of rollers share a single motor, ensuring that the rotation state of each set of drive rollers can be precisely controlled, providing a structural foundation for the accuracy and stability of mold transfer.

[0046] All four roller drive motors are connected to the control unit 500 via signal transmission. The control unit can independently adjust the speed and direction of each motor based on the real-time mold position information fed back by the positioning device 400. For example, when the first mold is moved between the fixed template 11 and the intermediate plate 13, the control unit can synchronously adjust the speeds of the first roller drive motor 241 and the second roller drive motor 242 to ensure that the two sets of drive rollers maintain the same rotational speed, thus driving the first mold to move smoothly. If the positioning device detects a slight deviation in the first mold, it can also fine-tune the speed of one of the motors to correct the mold's transfer path without affecting the operation of the third and fourth roller drive motors. This independent control method not only meets the high-efficiency requirement of synchronous transfer of two molds but also flexibly addresses the alignment deviation of a single mold, significantly improving transfer accuracy.

[0047] In some embodiments, see Figure 6 To assist the drive rollers 230 in achieving stable support and smooth transfer of the mold on the mold changing platform 100, and to further optimize the stability of the mold transfer process, the second drive mechanism includes driven rollers 250. Driven rollers 250 are disposed on the bearing surface of the mold changing platform 100 and arranged along the transfer path of the mold on the mold changing platform 100. They form a cooperative relationship with the four sets of drive rollers 230 in the second drive mechanism. That is, the drive rollers 230 provide transfer power to the mold through active rotation, while the driven rollers 250 assist in supporting the weight of the mold through passive rotation, and reduce the frictional resistance between the bottom of the mold and the bearing surface of the mold changing platform 100, ensuring that the mold remains stable during transfer between the mold changing platform 100 and the injection molding machine 1 template.

[0048] The driven roller 250 is rotatably connected to the mold changing platform 100. Its two ends are fixed to supports on the side of the mold changing platform 100's bearing surface via bearing seats. The main body of the roller protrudes from the bearing surface at a preset height, which matches the height of the drive roller 230 protruding from the bottom of the mold plate. This ensures that the bottom of the mold can simultaneously contact both the driven roller 250 and the drive roller 230, forming a unified support plane and preventing mold tilting due to height differences. Since the driven roller 250 is a non-drive design, it does not need to be connected to the roller drive motor 240. Instead, when the mold moves under the driving force of the drive roller 230, it is driven to rotate synchronously by the friction force at the bottom of the mold. This does not consume additional power and effectively disperses the pressure of the mold on the bearing surface of the mold changing platform 100, preventing scratches or wear on the bottom of the mold due to direct friction with the platform's bearing surface.

[0049] In practical applications, when the mold changing platform 100 moves the mold to the working area of ​​the injection molding machine 1, the drive roller 230 starts and moves the mold from the mold changing platform 100 into the injection molding machine 1. At this time, the driven roller 250 on the mold changing platform 100 will passively rotate with the movement of the mold. On the one hand, it provides upward support for the mold and avoids the mold from tilting in a "cantilever" manner because the front end has entered the injection molding machine 1 and the rear end is still on the mold changing platform 100. On the other hand, the rotation converts the sliding friction between the bottom of the mold and the mold changing platform 100 into rolling friction, which greatly reduces the resistance when the mold is moved, and makes the power of the drive roller 230 more efficiently transmitted to the mold, reducing power loss.

[0050] In a specific example, the driven rollers 250 are divided into two groups according to the dual-station design of the mold changing platform 100, corresponding to the two mold carrying areas of the mold changing platform 100. These are the first driven roller group 251 and the second driven roller group 252, which assist in the transfer of the first mold 14 and the second mold 15, respectively. The first driven roller group 251 corresponds to the transfer path of the first mold 14, and the second driven roller group 252 corresponds to the transfer path of the second mold 15. A preset distance is maintained between the two groups of driven rollers to avoid interference when the two molds are transferred synchronously. At the same time, the outer circumferential surface of the driven rollers 250 is also provided with a wear-resistant coating. This coating not only improves the service life of the driven rollers 250, but also enhances the contact stability between them and the bottom of the mold, preventing the mold from slipping due to the smooth surface of the driven rollers 250 during the transfer process, and further ensuring the transfer accuracy.

[0051] By setting the driven roller 250, the second drive mechanism forms a collaborative transfer system: it ensures the power requirements for mold transfer through the drive roller 230, and optimizes the support and friction conditions of the mold through the driven roller 250. This effectively avoids the jamming, tilting or wear problems that may occur when the mold is transferred on the mold changing platform 100. It provides key assistance for the seamless connection of the mold from the mold changing platform 100 to the injection molding machine 1 template, and further improves the operational stability and reliability of the entire injection molding machine mold changing system.

[0052] In some embodiments, see Figure 1 , Figures 3 to 5 The magnetic fixing device 300 specifically includes a first magnetic template 310, a second magnetic template 320, a third magnetic template 330, and a fourth magnetic template 340. Each magnetic template is installed according to the matching relationship between the mold and the injection molding machine 1 template. The fixing method is usually high-strength bolt connection, etc., to ensure that the connection strength with the template body is sufficient to withstand the reaction force when magnetic adsorption occurs, and to avoid template loosening or displacement during long-term use.

[0053] The first magnetic template 310 is fixed to the side of the fixed template 11 facing the intermediate plate 13. Its installation position corresponds to the preset fixed position of the first mold 14 between the fixed template 11 and the intermediate plate 13. When the first mold 14 moves into this position, the adsorption surface of the first magnetic template 310 can be tightly attached to one side of the first mold 14. The second magnetic template 320 is fixed to the side of the intermediate plate 13 facing the fixed template 11, and is set opposite to the first magnetic template 310. Its adsorption surface can be tightly attached to the other side of the first mold 14. Through the relative adsorption of the first magnetic template 310 and the second magnetic template 320, a balanced magnetic force can be applied from both sides of the first mold, firmly fixing the first mold between the fixed template 11 and the intermediate plate 13. This avoids tilting or loose fitting caused by force on one side of the mold, ensuring the positional accuracy of the first mold during injection molding.

[0054] Correspondingly, the fourth magnetic template 340 is fixed on the side of the moving template 12 facing the middle plate 13, and its installation position corresponds to the preset fixed position of the second mold between the middle plate 13 and the moving template 12; the third magnetic template 330 is fixed on the side of the middle plate 13 facing the moving template 12, and is set opposite to the fourth magnetic template 340. When the second mold 15 moves into this position, the third magnetic template 330 and the fourth magnetic template 340 apply magnetic force from both sides of the second mold 15 respectively, forming a double-sided adsorption fixation, ensuring that the second mold 15 remains stable between the middle plate 13 and the moving template 12, adapting to the needs of simultaneous injection molding or alternating use of dual molds. At the same time, the double-sided adsorption design can effectively disperse the magnetic force on the mold and avoid deformation of the mold due to excessive magnetic force in some areas.

[0055] Each magnetic template is connected to the control unit 500 and integrates an electromagnetic control component. The control unit 500 sends energizing or de-energizing commands to the corresponding magnetic template based on the mold positioning signal from the positioning device 400. When the mold reaches the preset position, the control unit 500 instructs the corresponding magnetic template to be energized, and the electromagnetic control component generates a strong magnetic field, which is transmitted to the mold surface through the template's adsorption surface, achieving mold adsorption and fixation. When mold replacement is required, the control unit 500 instructs the corresponding magnetic template to be de-energized. After the magnetic field disappears, the mold loses its adsorption force and can be moved out of the injection molding machine 1 by the second drive mechanism. This automated control method eliminates the need for manual operation of the magnetic switches, improving mold changing efficiency and avoiding the safety risks that may arise from manual intervention.

[0056] In some embodiments, see Figure 2 and Figure 6The positioning device 400 includes a laser positioning module 410, which is a core sub-component responsible for acquiring the real-time position information of the mold-changing platform 100. Its core function is configured to detect the dynamic position of the mold-changing platform 100 in real time, providing reliable position data support for the control unit 500 to accurately control the drive unit 200. Unlike fixed installation methods, the laser positioning module 410 is actually mounted on the mold-changing platform 100 and moves synchronously with it. This installation method avoids the problem of obstructed detection view caused by a fixed module, ensuring that the module can stably acquire position reference signals throughout the entire movement range of the mold-changing platform 100, while reducing delays in signal transmission and improving the real-time performance of position detection.

[0057] From an installation layout perspective, the laser positioning module 410 is typically fixed to the side or bottom non-load-bearing area of ​​the mold changing platform 100, thus neither occupying mold placement space nor interfering with mold transfer operations on the mold changing platform 100. To facilitate position detection with the laser positioning module 410, a positioning reference plate is correspondingly installed on the frame of the injection molding machine 1 or on a fixed structure beside the moving path of the mold changing platform 100. This reference plate is made of a highly reflective and flat material with no obvious scratches or deformations on its surface, providing a stable reflective surface for the laser positioning module 410. This ensures that the laser signal emitted by the module can be accurately reflected back to the receiving end, reducing detection errors caused by irregular reflective surfaces. The detection direction of the laser positioning module 410 is towards the positioning reference plate. When the mold changing platform 100 moves along the track 210, the module moves synchronously with the platform, continuously emitting laser signals towards the reference plate and receiving reflected signals. By calculating the propagation time or phase difference of the laser signal, the current position coordinates of the mold changing platform 100 relative to the reference plate are calculated in real time.

[0058] The laser positioning module 410 maintains a continuous signal connection with the control unit 500. Considering that the module moves with the mold changing platform 100, the two are usually connected through a transmission method adapted to the mobile scenario, such as using a drag chain cable or wireless signal transmission, to ensure that the position data of the mold changing platform 100 can be stably and uninterruptedly transmitted to the control unit 500 during the movement. After receiving the position data, the control unit 500 compares it with the preset target position (such as the platform docking position corresponding to the working area of ​​injection molding machine 1) to form a "detection-feedback-control" position closed loop: when the mold changing platform 100 moves towards the target position, the control unit 500 can dynamically adjust the speed and direction of the platform drive motor 220 in the drive unit 200 according to the real-time position fed back by the laser positioning module 410; for example, when the mold changing platform 100 approaches the target position, the control unit 500 will control the motor to reduce the speed, so that the mold changing platform 100 decelerates smoothly and avoids position deviation due to inertial overshoot; if the movement path of the mold changing platform 100 is detected to be deviated, the control unit 500 can also fine-tune the motor direction in time to correct the platform movement trajectory and ensure that the mold changing platform 100 finally stops accurately at the preset position, laying the foundation for the subsequent alignment of the mold and the mold plate of injection molding machine 1.

[0059] In some embodiments, see Figure 2 and Figures 3 to 5 The positioning device 400 also includes a first detection sensor 420 and a second detection sensor 430. The first detection sensor 420 is used to accurately identify whether the mold has reached the preset transfer endpoint, ensuring that the mold stops at the target position during transfer. The second detection sensor 430 is used to determine whether the mold has been completely removed from the injection molding machine, providing an accurate trigger signal for the control unit 500 to switch subsequent actions.

[0060] The installation position of the first detection sensor 420 is precisely calibrated to perfectly correspond to the preset end position of the mold. Only when the mold fully reaches the end position can its edge or the preset detection part just enter the sensing range of the sensor and trigger the detection signal, thus avoiding the problems of "triggering before reaching" or "overshooting without triggering" caused by sensor position deviation.

[0061] In the scenario where the mold is moved into the injection molding machine 1, for the preset endpoint of the first mold (the mating position between the fixed template 11 and the intermediate plate 13), the first detection sensor 420 will be installed on the side of the fixed template 11 near the intermediate plate 13, and / or the side of the intermediate plate 13 near the fixed template 11, to ensure that the side wall of the mold triggers the sensor when the first mold is completely moved to the mating position between the two templates; for the preset endpoint of the second mold (the mating position between the intermediate plate 13 and the moving template 12), the sensor will be installed on the side of the intermediate plate 13 near the moving template 12, and / or the side of the moving template 12 near the intermediate plate 13, and similarly, the signal will only be triggered when the second mold reaches the target position between the two templates.

[0062] The first detection sensor 420 maintains a real-time signal connection with the control unit 500, and its triggering logic is directly related to the start and stop of the drive unit 200: during the mold insertion process, when the second drive mechanism drives the mold to move towards the endpoint, the first detection sensor 420 is in an untriggered state before the mold arrives, and the control unit 500 continuously controls the operation of the drive mechanism; once the mold reaches the endpoint and triggers the first detection sensor 420, the first detection sensor 420 immediately sends a position signal to the control unit 500. After receiving the signal, the control unit 500 quickly instructs the second drive mechanism to stop operating to prevent the mold from overshooting and impacting the template due to inertia. At the same time, the magnetic fixing device 300's adsorption program is activated to ensure that the mold is stably fixed at the endpoint position.

[0063] The second detection sensor 430 is respectively arranged on the support frame 110, the first support plate 120 and the second support plate 130, and is located on the mold moving path.

[0064] During the mold removal process, when the mold begins to move and passes the second detection sensor 430, it is triggered and remains in the triggered state; the control unit 500 controls the second drive mechanism to continue operating until the mold is completely removed and leaves the detection range of the second detection sensor 430, the signal of the second detection sensor 430 disappears, and the control unit 500 then commands the second drive mechanism to stop operating.

[0065] The second detection sensor 430 maintains a real-time signal connection with the control unit 500, and its triggering logic is directly related to the start and stop of the drive unit 200: during the mold removal process, when the second drive mechanism drives the mold to move towards the mold changing platform 100, the second detection sensor 430 is in a triggered state, and the control unit 500 continuously controls the operation of the drive mechanism; once the mold reaches the end point and the triggering of the second detection sensor 430 is released, the second detection sensor 430 immediately sends an in place signal to the control unit 500. After receiving the signal, the control unit 500 instructs the second drive mechanism to stop operating, and at the same time starts the first drive mechanism to drive the mold changing platform 100 to send the mold away.

[0066] In some embodiments, see Figure 2 The injection molding machine mold changing system also includes a mold information identification module 600, which automatically acquires key parameters of the mold to be replaced, providing data for the control unit 500 to accurately adjust the position of the injection molding machine 1 components, avoiding errors or inefficiencies caused by manual parameter input. The mold information identification module 600 is configured to acquire the mold's identity information and mold thickness parameters. The identity information is used to distinguish molds of different models or uses, ensuring that the control unit 500 can identify whether the currently transferred mold is the preset target mold for replacement. The mold thickness parameters are directly related to the adjustment requirements of the internal mold space of the injection molding machine 1 and are key data for determining the position of the moving platen 12 and the intermediate plate 13.

[0067] To acquire parameters, the mold information identification module 600 consists of two parts: an information reading component and an information carrier on the mold. The information carrier is pre-fixed on the non-working surface of the mold and stores the mold's identification information and mold thickness parameters. The information reading component is installed next to the bearing area of ​​the mold changing platform 100 or at the entrance of the injection molding machine 1's working area to ensure that the reading component can identify the data in the information carrier at close range when the mold is moved to this area, avoiding identification failure due to excessive distance. The mold information identification module 600 maintains a stable signal connection with the control unit 500. After the reading component acquires the mold's identification information and mold thickness parameters, it immediately transmits the data to the control unit 500. The control unit 500 verifies and parses the data, and only executes subsequent control actions based on the mold thickness parameters after confirming that the data is correct.

[0068] The control unit 500 is further configured to control the injection molding machine 1 to adjust the positions of the moving template 12 and the intermediate plate 13 based on the acquired mold thickness parameters to form a suitable mold space. The mold space refers to the area between the moving template 12, the fixed template 11, and the intermediate plate 13 used to accommodate the mold, and its size must be strictly matched with the mold thickness. If the mold space is too large, the mold may wobble during subsequent fixing, affecting the injection molding accuracy; if the mold space is too small, the mold cannot be fully inserted, and may even collide with the templates, causing damage. Therefore, the control unit 500 determines the required mold space size based on the mold thickness parameters, and then sends a command to the drive component in the injection molding machine 1 that controls the movement of the moving template 12 and the intermediate plate 13, driving the moving template 12 to move closer to or further away from the intermediate plate 13, while adjusting the relative position of the intermediate plate 13 and the fixed template 11, until the mold space between the three can just accommodate the current mold, ensuring that the mold can accurately fit with each template after being moved in.

[0069] In a specific example, the information carrier on the mold uses an RFID tag. This tag is waterproof and oil-resistant, adaptable to the complex environment of the injection molding workshop, and its data storage is stable and not easily lost. The information reading component of the mold information identification module 600 uses an RFID reader, which is installed on the mold changing platform 100 near the injection molding machine 1. When the mold is placed on the mold changing platform 100, the reader automatically scans the RFID tag on the mold, completes the reading of the identity information and mold thickness parameters within 1 second, and transmits it to the control unit 500 in real time. After the control unit 500 analyzes the mold thickness parameters, if it finds that the current mold space is smaller than the mold thickness, it will immediately control the moving platen drive mechanism in the injection molding machine 1 to move the moving platen 12 away from the intermediate plate 13, and at the same time control the intermediate plate drive mechanism to move the intermediate plate 13 away from the fixed platen 11, gradually expanding the mold space until the space size matches the mold thickness parameters. Then, it stops adjusting and waits for the mold to move into the mold space.

[0070] Through the coordinated operation of the mold information recognition module 600 and the control unit 500, the entire mold space adjustment process is fully automated, eliminating the need for manual measurement of mold thickness or manual adjustment of the template position. This significantly shortens the adjustment time and avoids parameter errors that may be caused by manual operation, ensuring that each mold replacement corresponds to a suitable mold space. This provides a prerequisite for the smooth transfer and reliable fixing of subsequent molds, further improving the automation level and operational reliability of the entire injection molding machine mold replacement system.

[0071] In some embodiments, see Figures 3 to 5 The injection molding machine mold changing system also includes a limiting mechanism 700. The core function of this mechanism is to ensure the positional stability and operational safety of the mold throughout the entire mold changing process from multiple dimensions, including mold placement, transfer to the correct position, post-fixation protection, and extreme position control, so as to avoid equipment damage or mold changing failure caused by mold offset, overturning, or over-positioning.

[0072] The limiting mechanism 700 is specifically composed of at least one of the following: platform limiting block 710, horizontal locking device 720, pneumatic limiting device 730, and mechanical limiting block 740. Each component is arranged in a corresponding key position of the system according to its functional characteristics, forming a cooperative protection with the mold changing platform 100, the template of the injection molding machine 1, and the magnetic fixing device 300.

[0073] The platform limiting block 710 is protruding and located on the bearing surface of the mold changing platform 100. It is typically detachably fixed with high-strength bolts. The height of the protrusion is preferably such that it can contact the edge of the mold without interfering with the mold's movement. This block is configured to guide and limit the placement of the mold. When the mold is placed on the mold changing platform 100, the edge of the mold will fit against the side of the platform limiting block 710. The block restricts the lateral or longitudinal movement of the mold on the bearing surface by physically blocking it, ensuring that the mold accurately falls into the preset area corresponding to the drive roller 230 and the driven roller 250. This avoids the risk of slippage during subsequent movement of the mold changing platform 100 due to placement misalignment, which could result in the mold not being able to accurately cooperate with the rollers.

[0074] In a specific example, the platform limit block 710 is divided into two groups according to the dual-station design of the mold changing platform 100, which correspond to the bearing areas of the first mold and the second mold respectively. The spacing of each group of blocks can be preset according to the commonly used mold size. Even if different molds are replaced, they can be quickly positioned and placed by the blocks, improving the mold placement efficiency.

[0075] The horizontal locking device 720 is actually integrated with the magnetic template of the magnetic fixing device 300. Specifically, it is set on the second magnetic template 320 fixed to the moving template 12 and the first magnetic template 310 fixed to the fixed template 11, and its clamping direction is perpendicular to the adsorption surface of the magnetic template. This device is configured to perform a horizontal locking action to clamp and fix the mold after the mold is moved into the injection molding machine 1. That is, when the mold is moved into the mold space by the second drive mechanism and the magnetic template is energized to adsorb the mold, the positioning wedge of the horizontal locking device 720 will extend towards the mold to limit and lock the mold in the horizontal direction. This design simplifies the structural layout by utilizing the installation foundation of the magnetic template, and can supplement the vertical adsorption force of the magnetic template through horizontal limiting, preventing the mold from horizontally displacing due to the pressure of the molten material or equipment vibration during the injection molding process, further improving the fitting accuracy between the mold and the magnetic template, and ensuring the dimensional stability of the injection molded product.

[0076] In a specific example, the positioning wedge of the horizontal locking device 720 adopts an arc-shaped structure, and there is a groove at the corresponding position on the edge of the mold that engages with it. The two engage to achieve horizontal locking of the mold.

[0077] Multiple pneumatic limiting devices 730 are respectively installed on the upper part of the operating side of the first magnetic template 310, the second magnetic template 320, and the third magnetic template 330 and the fourth magnetic template 340 on both sides of the intermediate plate 13. The operating side is the side close to the equipment operation interface, and the device is connected to the air supply system of the injection molding machine 1 through an air pipe, using compressed air as the power source. The pneumatic limiting device 730 is configured to extend after the mold is attracted and fixed by the magnetic fixing device 300 to prevent the mold from tipping over. That is, when the magnetic template is energized and attracts the mold, the piston rod of the pneumatic limiting device 730 will quickly extend, and its end will press against the pre-set limiting groove on the upper part of the mold, applying a limiting force to the mold from the top. This layout integrated with the magnetic template allows the limiting force to act directly on the vicinity of the contact area between the mold and the magnetic template. For molds with high height or offset center of gravity, it can effectively counteract their tipping tendency and avoid lateral instability caused by magnetic attraction only providing vertical force.

[0078] The mechanical limit block 740 is fixed to the non-operating side of the moving template 12 and the fixed template 11 by a bracket. The non-operating side is the side opposite to the operating side. The bracket is connected to the template body by welding or high-strength bolts to ensure the stability of the overall structure. The limit block is made of high-strength alloy and the surface is hardened to withstand the impact force that may be generated during mold transfer, avoiding deformation or wear after long-term use. The limiting block is configured to restrict the extreme positions of the mold's entry or exit. That is, when the mold enters the injection molding machine 1, if the drive unit 200 has a control deviation that causes the mold to continuously move towards the moving template 12 or the fixed template 11, the non-operating edge of the mold will first contact the mechanical limiting block 740 on the corresponding template. The limiting block forces the mold to stop moving by physically blocking it, avoiding excessive impact of the mold on the moving template 12, the fixed template 11 or the magnetic template, and preventing damage to the template surface or deformation of the magnetic template's adsorption surface. When the mold exits the injection molding machine 1, if the drive mechanism goes out of control and causes the mold to exit too quickly or exceed the limit, the mechanical limiting block 740 can also play a buffering and blocking role, preventing the mold from slipping off the mold changing platform 100 due to inertia, and further ensuring the safety of the transfer process.

[0079] Through the integrated layout of the above components and magnetic template and multi-dimensional protection, the limiting mechanism 700 can cover the safety requirements of the entire process of mold placement, transfer, fixation to use. It forms a linkage with the drive unit 200, positioning device 400 and control unit 500, which not only ensures the positional accuracy of the mold in each stage, but also effectively avoids various safety risks, providing key guarantees for the stable and safe operation of the injection molding machine mold replacement system.

[0080] The workflow of the injection molding machine mold changing system provided in this application is as follows: First, in the preparation stage, the operator places the first mold 14 and the second mold 15 on the dual-station bearing surface of the mold changing platform 100. The platform limiting block 710 on the mold changing platform 100 guides and limits the molds through physical blocking, ensuring that the two molds fall precisely in the preset areas corresponding to the first driven roller group 251 and the second driven roller group 252, avoiding placement deviation. The first driven roller group 251 and the second driven roller group 252 provide support for the molds through a passive rotation structure, while converting the sliding friction between the bottom of the mold and the bearing surface of the mold changing platform 100 into rolling friction, reducing subsequent transfer resistance. Subsequently, the information reading component of the mold information identification module 600 is activated, scanning the information carrier on the non-working surface of the mold to quickly obtain the identity information and mold thickness parameters of the two molds, and transmitting the data to the control unit 500 in real time. After verifying and parsing the data, the control unit 500 immediately sends a command to the drive component in the injection molding machine 1 that controls the movement of the moving template 12 and the intermediate plate 13, driving the moving template 12 to move closer to or further away from the intermediate plate 13, while adjusting the relative position of the intermediate plate 13 and the fixed template 11 until a mold space that is precisely matched with the mold thickness parameters is formed between the three, preparing for the subsequent mold movement.

[0081] After the preparation is completed, the control unit 500 sends an action command to the first drive mechanism of the drive unit 200. The platform drive motor 220 starts and drives the mold changing platform 100 to move along the track 210 to the working area of ​​the injection molding machine 1 through the transmission structure. The track 210 provides precise guidance and load support for the mold changing platform 100 to ensure that it moves in a straight line. During this process, the laser positioning module 410, which is set on the mold changing platform 100, moves synchronously with the platform, continuously emits laser signals to the positioning reference plate on the injection molding machine 1 frame and receives reflected signals. By calculating the laser propagation time or phase difference, the position coordinates of the mold changing platform 100 are calculated in real time, and the position data is continuously fed back to the control unit 500. The control unit 500 dynamically adjusts the speed and rotation direction of the platform drive motor 220 according to the feedback data, so that the mold changing platform 100 slowly accelerates when starting and gradually decelerates when stopping, and finally stops smoothly at the preset working position. At this time, the mold changing platform 100 is attached to the support frame 110, the first support plate 120 and the second support plate 130, which effectively enhances the structural rigidity of the edge area, avoids sagging after bearing the mold, and ensures that the bearing surface always remains horizontal.

[0082] After the mold changing platform 100 is in place, the control unit 500 immediately instructs the second drive mechanism of the drive unit 200 to start. The first to fourth roller drive motors drive the corresponding first to fourth drive roller groups to rotate. The first drive roller group 231 and the second drive roller group 232 form a first cooperation unit, which together move the first mold 14 to the mold space between the fixed template 11 and the intermediate plate 13. The third drive roller group 233 and the fourth drive roller group 234 form a second cooperation unit, which together move the second mold 15 to the mold space between the intermediate plate 13 and the moving template 12. During the transfer, the first driven roller group 251 and the second driven roller group 252 on the mold changing platform 100 are driven to rotate synchronously by the friction force at the bottom of the mold, which not only provides stable support for the mold, but also further reduces the transfer resistance and ensures that the mold moves smoothly. Meanwhile, the first detection sensor 420 of the positioning device 400 monitors the mold position in real time. When the first mold 14 reaches the preset position between the fixed template 11 and the intermediate plate 13, the first detection sensor 420 installed on the side of the fixed template 11 near the intermediate plate 13 and the side of the intermediate plate 13 near the fixed template 11 is triggered. When the second mold 15 reaches the preset position between the intermediate plate 13 and the moving template 12, the first detection sensor 420 installed on the side of the intermediate plate 13 near the moving template 12 and the side of the moving template 12 near the intermediate plate 13 is triggered. The first detection sensor 420 immediately sends a position signal to the control unit 500. After receiving the signal, the control unit 500 quickly instructs the first to fourth roller drive motors 241-244 to stop running to prevent the mold from overshooting and hitting the template due to inertia.

[0083] Once the mold is in place, the control unit 500 sends an adsorption command to the magnetic fixing device 300. The first magnetic template 310 fixed on the side of the fixed template 11 facing the middle plate 13 and the second magnetic template 320 fixed on the side of the middle plate 13 facing the fixed template 11 are energized to generate a strong magnetic field, forming a double-sided adsorption from both sides of the first mold 14, firmly fixing the first mold 14 between the two templates. The third magnetic template 330 fixed on the side of the middle plate 13 facing the moving template 12 and the fourth magnetic template 340 fixed on the side of the moving template 12 facing the middle plate 13 are simultaneously energized, achieving double-sided adsorption and fixing from both sides of the second mold 15, ensuring that the mold and the template fit tightly together. Simultaneously, all components of the limiting mechanism 700 operate synchronously. The horizontal locking device 720, integrated with the magnetic fixing device 300, is activated, and its positioning wedge extends towards the mold, limiting and locking the mold from the horizontal direction to prevent horizontal displacement of the mold. The pneumatic limiting device 730, located on the upper part of the operating side of each magnetic template, receives compressed air from the air source system of the injection molding machine 1 through an air pipe. The piston rod quickly extends and presses against the preset limiting groove on the upper part of the mold, effectively counteracting the tendency of the mold to overturn. Meanwhile, the mechanical limiting block 740 fixed on the non-operating side of the moving template 12 and the fixed template 11 continues to play a role in limiting the extreme position of the mold and preventing the mold from shifting due to equipment vibration during subsequent injection molding.

[0084] When the injection molding operation is completed and the mold needs to be changed, the control unit 500 first commands the magnetic fixing device 300 to de-energize, and the magnetic field of the first to fourth magnetic templates quickly disappears. Then, the positioning wedge of the horizontal locking device 720 retracts, and the piston rod of the pneumatic limiting device 730 resets, releasing the fixing and limiting of the mold. Next, the control unit 500 commands the second drive mechanism to run in reverse. The first to fourth roller drive motors drive the corresponding drive rollers 230 to rotate in reverse, transferring the first mold 14 and the second mold 15 from the injection molding machine 1 to the mold changing platform 100 in reverse. During the transfer, the second detection sensor 430, which is installed on the support frame 110, the first support plate 120 and the second support plate 130, detects the mold position in real time. When the mold has completely returned to the mold changing platform 100, the second detection sensor 430 can no longer detect the mold and immediately sends a move-out signal to the control unit 500. The control unit 500 then commands the roller drive motor 240 to stop running. Finally, the control unit 500 instructs the platform drive motor 220 of the first drive mechanism to rotate in the opposite direction, driving the mold changing platform 100 to leave the working area of ​​the injection molding machine 1 along the track 210. The laser positioning module 410 continues to provide real-time feedback of position data to ensure that the mold changing platform 100 is smoothly reset, completing a complete mold changing process.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A mold changing system for an injection molding machine, characterized in that, include: The movable mold-changing platform is configured to support at least two molds simultaneously. The drive unit is configured to drive the mold changing platform to move and drive the mold to move into or out of the injection molding machine; A magnetic fixing device is installed on the moving platen, fixed platen, and intermediate plate of an injection molding machine, and is configured to selectively attract and fix or release the mold by magnetic force. The positioning device is configured to acquire position information of the mold changing platform and the mold; and The control unit is signal-connected to the drive unit, the magnetic fixing device, and the positioning device, respectively. The control unit is configured to: Based on the position information obtained by the positioning device, the drive unit is controlled to perform the mold insertion and removal operations; And control the magnetic fixing device to perform the corresponding adsorption fixing or release operation.

2. The injection molding machine mold changing system according to claim 1, characterized in that, The driving unit includes a first driving mechanism, which includes a track and a platform driving motor. The mold changing platform is slidably disposed on the track, and the platform driving motor is connected to the mold changing platform and configured to drive the mold changing platform to move along the track.

3. The injection molding machine mold changing system according to claim 1, characterized in that, The driving unit includes a second driving mechanism, which includes at least four sets of driving rollers and roller driving motors. The driving rollers are respectively disposed on the moving template, the fixed template and the intermediate plate. The roller driving motors are configured to drive the driving rollers to rotate in order to transfer the mold into or out of the injection molding machine.

4. The injection molding machine mold changing system according to claim 3, characterized in that, The second drive mechanism further includes a driven roller, which is disposed on the mold changing platform.

5. The injection molding machine mold changing system according to claim 1, characterized in that, It also includes a mold information identification module, which is configured to acquire the mold's identity information and mold thickness parameters; the control unit is signal-connected to the mold information identification module.

6. The injection molding machine mold changing system according to claim 5, characterized in that, The control unit is further configured to: control the injection molding machine to adjust the position of the template and the intermediate plate based on the acquired mold thickness parameters, so as to form a suitable mold space.

7. The injection molding machine mold changing system according to claim 1, characterized in that, The positioning device includes a laser positioning module, which is configured to detect the position of the mold changing platform in real time.

8. The injection molding machine mold changing system according to claim 1, characterized in that, The positioning device further includes a first detection sensor, which is arranged on the moving path of the mold and configured to detect whether the mold has reached the preset moving position.

9. The injection molding machine mold changing system according to claim 1, characterized in that, The positioning device further includes a second detection sensor, which is arranged on the moving path of the mold and configured to detect whether the mold has reached the preset move-out position.

10. The injection molding machine mold changing system according to claim 1, characterized in that, It also includes a limiting mechanism, which includes at least one of the following: The platform limiting block is protruding on the bearing surface of the mold changing platform and is configured to guide and limit the placement position of the mold; A horizontal locking device is provided on the moving platen and the fixed platen, and is configured to perform a horizontal locking action to fix the mold after the mold is moved into the injection molding machine; A pneumatic limiting device is provided on the upper part of the operating side of the moving template, the fixed template and the intermediate plate, and is configured to extend after the mold is attracted and fixed by the magnetic fixing device to prevent the mold from tipping over. A mechanical limit block is fixedly installed on the non-operation side of the moving template and the fixed template, and is configured to limit the extreme position of the mold movement.

Images