Mold device and protection system thereof

Abstract

The invention discloses a mold device and a protection system thereof, the device comprises a front mold structure, a rear mold structure and a floating slide block, the floating slide block is movably arranged between the front mold structure and the rear mold structure, the outer side of the floating slide block is provided with a travel switch assembly, and the travel switch assembly and a mold opening signal are connected in series to form a protection loop. The travel switch assembly comprises a travel switch A and a travel switch B, the travel switch A is provided with a travel switch A contact surface in contact with the rear mold structure, a front mold end block is arranged on the outer side of the front mold structure, and the travel switch B is provided with a travel switch B contact surface in contact with the front mold end block. Parts of parallel loops formed by the travel switch A and the travel switch B are overlapped, loop contact breaking caused by travel errors is avoided, safety and reliability are achieved, and potential safety hazards are reduced.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a mold device and its protection system. Background Technology

[0002] In automotive taillight cover molds, the rear mold usually has a hydraulically driven core-pulling mechanism to ensure smooth demolding of the product at the undercut. During the first molding, to prevent the product from falling off and the core-pulling mechanism from retracting and rotating for the second molding and injection, the front mold usually uses a floating slider to ensure smooth core-pulling and demolding of the rear mold. The floating slider uses hooks and springs. The rear mold has hooks, and the floating slider and the rear mold are fixedly connected together by the hooks. When the mold is separated, the rear mold hooks drive the front mold floating slider, and at the same time, the springs provide elasticity to make the floating slider pop out smoothly.

[0003] When the sliding clearance of the floating slider is small, it may cause jamming due to thermal expansion and contraction at high mold temperatures, resulting in damage to the position where the core puller and the floating slider interfere with each other. Once a collision occurs, both the internal core puller and the floating slider need to be repaired, which is extremely expensive and affects production. Currently, in the mold industry, there are methods to detect whether the slider has moved out normally by setting a stroke rod and a stroke sensor switch, such as the structure disclosed in patent CN212147380U that uses a slider sensor switch to control the mold opening stroke. However, this structure is complex and occupies internal space in the mold. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a mold device and its protection system, which occupies little space and can avoid abnormal situations caused by stroke errors.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A mold device includes a front mold structure, a rear mold structure, and a floating slider. The floating slider is movably disposed between the front mold structure and the rear mold structure. A limit switch assembly is provided on the outside of the floating slider. The limit switch assembly is connected in series with a mold opening signal to form a protection circuit.

[0006] Further or preferred: The front mold structure includes a front mold frame and a front mold core disposed within the front mold frame. The rear mold structure includes a rear mold frame and a rear mold core disposed within the rear mold frame. A floating slider is disposed between the front mold frame and the rear mold frame and is located on the same side of the two cores. A limit switch assembly is fixed on the outer surface of the floating slider.

[0007] The limit switch assembly includes limit switch A and limit switch B. Limit switch A has a limit switch A contact surface that contacts the rear mold structure, and a front mold end block is provided on the outer side of the front mold structure. Limit switch B has a limit switch B contact surface that contacts the front mold end block.

[0008] The outer surface of the floating slider is provided with a limit switch fixing block, and limit switches A and B are fixedly installed on opposite sides of the limit switch fixing block.

[0009] The lower end of the front mold end block is fixed to the front mold structure, and the upper end of the front mold end block has a bent portion. The lower surface of the bent portion forms a front mold end block contact surface that mates with the contact surface of the limit switch B.

[0010] Limit switches A and B are arranged side by side and are respectively fixed to the corresponding sides of the limit switch fixing block by fasteners.

[0011] The limit switch A has an inner boss at its inner end, and the upper surface of the inner boss forms the contact surface of the limit switch A. The limit switch B has an outer boss at its outer end, and the upper surface of the outer boss forms the contact surface of the limit switch B.

[0012] A protection system for a mold assembly includes limit switches A and B connected in parallel. These parallel switches are then connected in series with the machine tool PLC to form the protection system. Limit switch A contacts the rear mold structure when the mold is closed. During the movement of the floating slider, limit switch A moves along with the floating slider, maintaining constant contact with the rear mold structure. When the floating slider reaches its travel point, limit switch B contacts the signal block on the front mold, indicating that the floating slider has reached its position. When the floating slider jams during movement, the signal from limit switch A is disconnected, and limit switch B also loses its signal, breaking the circuit and stopping the machine tool.

[0013] The parallel circuit formed by limit switch A and limit switch B has a partial overlap, and the safety margin for the overlapping product parts when leaving the mold is 2mm to 5mm.

[0014] The floating slider is equipped with a guide, and the gap between the guide and the guide groove of the front mold structure is controlled between 0.01-0.04mm.

[0015] Compared with the prior art, the present invention has the following advantages: The mold device and its protection system are reasonably designed. The limit switches are located outside the floating slider, occupying little space inside the mold. During the movement of the floating slider, if the floating slider does not move, the limit switch A will open, causing the machine tool to disconnect the mold opening signal and stop the machine tool. The response time is extremely fast, which can effectively avoid the problem of mold collision caused by the floating slider not popping out. The parallel circuit formed by limit switches A and B has a partial overlap, which avoids the circuit disconnection caused by the stroke error, making it safe and reliable and reducing safety hazards. Attached Figure Description

[0016] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings: Figure 1 This is a schematic diagram of the combination of the floating slider and the core pulling mechanism in the mold.

[0017] Figure 2 This is a schematic diagram of the overall structure of the mold in the closed state of the present invention.

[0018] Figure 3 This is a schematic diagram of the overall structure of the mold in the open state of the present invention.

[0019] Figure 4 For along Figure 2 Schematic diagram of sectional view AA.

[0020] Figure 5 For along Figure 3 Schematic diagram of the BB section.

[0021] Figure 6 This is a schematic diagram of the limit switch assembly of the present invention.

[0022] In the picture: 1. Front mold core, 2. Product part, 3. Front mold frame, 4. Rear mold frame, 5. Rear mold core, 6. Inner core pulling, 7. Floating slider, 8. Front mold end block, 9. Limit switch fixing block, 10. Limit switch A, 11. Limit switch B, 12. Limit switch A contact surface, 13. Rear mold contact surface, 14. Limit switch B contact surface, 15. Front mold end block contact surface. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0024] Although the invention has been shown and described herein with reference to specific embodiments, it is not intended to be limited to the details shown. Rather, various modifications in detail may be made within the equivalent scope and scope of the claims without departing from the invention. In the drawings, the same item numbers refer to the same elements.

[0025] Throughout this disclosure, various terms are used to describe the physical shape or arrangement of features. Many of these terms are used to describe features conforming to a cylindrical or generally cylindrical geometry with the feature as its radius and a central axis perpendicular to that radius. Unless otherwise specified, the terms are given the following meanings: The terms “longitudinal,” “longitudinal,” “axial,” and “axial” refer to a direction, dimension, or orientation parallel to the central axis. The terms “radial” and “radially” refer to a direction, dimension, or orientation perpendicular to the central axis. The terms “inward” and “inner” refer to a direction, dimension, or orientation extending radially toward the central axis. The terms “outward” and “outer” refer to a direction, dimension, or orientation extending radially away from the central axis.

[0026] In this specification, relative terms such as “horizontal,” “vertical,” “upward,” “downward,” “top,” and “bottom,” and their derivatives (e.g., “horizontal,” “downward,” “upward,” etc.) should be interpreted as referring to the direction described or the direction shown in the accompanying drawings. These relative terms are for ease of description and are not generally intended to require a specific direction.

[0027] The main purpose of this invention is to promptly detect the problem of the floating slider not popping out, ensure that the mold is opened only when the floating slider has fully popped out, avoid mold collision, and improve the safety of mold operation.

[0028] like Figures 1 to 6 As shown, the present invention provides a mold device with a floating slider protection function, including a front mold structure, a rear mold structure, and a floating slider 7. The floating slider is movably disposed between the front mold structure and the rear mold structure. A limit switch assembly is provided on the outside of the floating slider. The limit switch assembly is connected in series with the mold opening signal to form a protection circuit.

[0029] The limit switch is integrated on the outside of the floating slider, occupying little space inside the mold. This invention forms a protection system by connecting the limit switch fixed to the floating slider with the mold opening signal, so as to detect the situation where the floating slider does not pop out in time and improve the safety of the mold.

[0030] The front mold structure includes a front mold frame 3 and a front mold core 1 located inside the front mold frame. The rear mold structure includes a rear mold frame 4 and a rear mold core 5 located inside the rear mold frame. An inner core pull 6 is provided on the side of the rear mold frame corresponding to the rear mold core. The rear mold core and the inner core pull are combined to form an integral core structure of the rear mold, which facilitates the smooth demolding of the undercut part 2. The floating slider 7 is located between the front mold frame and the rear mold frame and on the same side of the two cores. The limit switch assembly is fixed on the outer surface of the floating slider. The structure is simple, does not occupy the internal space of the mold, and is easy to arrange and install.

[0031] Preferably, the limit switch assembly includes limit switch A10 and limit switch B11. Limit switch A has a limit switch A contact surface 12 that contacts the rear mold structure, and the rear mold frame and the corresponding surface of limit switch A form a rear mold contact surface 13. A front mold end block is provided on the outer side of the front mold structure, and limit switch B has a limit switch B contact surface 14 that contacts the front mold end block.

[0032] Specifically, limit switches A and B are installed on the outside of the floating slider. Limit switches A and B are connected in parallel and then in series with the mold opening signal to form a circuit. Limit switch A contacts the rear mold when the mold is closed. During the movement of the floating slider, limit switch A moves together with the floating slider, always maintaining contact with the rear mold. When the floating slider reaches its stroke point, limit switch B contacts the signal stop block set on the front mold, indicating that the floating slider has reached its position. When the floating slider jams during movement, the signal of limit switch A is disconnected. At this time, limit switch B also has no signal, the circuit is broken, and the machine tool stops running. This scheme satisfies both the process control and reset control of the floating slider.

[0033] In the present invention, when the floating slider fails to move during its movement, the limit switch A is disconnected, which causes the machine tool's mold opening signal to be disconnected, causing the machine tool to stop running. The response time is extremely fast, which can effectively avoid the mold collision problem caused by the floating slider failing to pop out.

[0034] The outer side of the floating slider is provided with a limit switch fixing block 9, and limit switches A10 and B11 are fixedly installed on opposite sides of the limit switch fixing block; furthermore, limit switches A and B are arranged side by side and fixed to the corresponding sides of the limit switch fixing block by fasteners; the integrated arrangement is compact and occupies little space.

[0035] Specifically, the outer side of the floating slider is provided with bolt holes, and the limit switch fixing block is provided with through mounting holes. The mounting holes are stepped holes. The bolts pass through the mounting holes and cooperate with the bolt holes on the side of the floating slider to fix the limit switch fixing block. Limit switches A and B are each provided with a set of fixing holes, and the limit switch fixing blocks are provided with screw holes on opposite sides. Limit switches A and B are fixed by screws passing through the fixing holes and cooperating with the screw holes. The structure is reasonably designed and easy to install and fix.

[0036] Preferably, the lower end of the front mold end block is fixed on the front mold structure, and the upper end of the front mold end block has a bent portion, the lower surface of which forms a front mold end block contact surface 15 that mates with the contact surface of the limit switch B.

[0037] Specifically, the lower end of the front mold end block 8 is provided with a lower bend, and the upper end of the front mold end block is provided with an upper bend. Both the lower bend and the upper bend are right-angled structures. The lower end of the front mold end block is fixed to the outer surface of the floating slider through the lower bend, and the structure is stable and reliable. The lower surface of the upper bend forms the contact surface of the front mold end block, that is, it forms a contact structure with the corresponding limit switch, thereby realizing the parallel connection of the two limit switches integrated side by side with the front and rear mold structures.

[0038] Limit switch A has an inner boss at its inner end, and the upper surface of the inner boss forms the contact surface of limit switch A. Limit switch B has an outer boss at its outer end, and the upper surface of the outer boss forms the contact surface of limit switch B. Limit switches are used in combination and in parallel.

[0039] This invention provides a protection system for a mold device. Limit switches A and B are connected in parallel and then connected in series with the machine tool PLC to form a protection system. Limit switch A contacts the rear mold structure when the mold is closed. During the movement of the floating slider, limit switch A moves together with the floating slider and always maintains contact with the rear mold structure. When the floating slider reaches its stroke point, limit switch B contacts the signal block set on the front mold, indicating that the floating slider has reached its position. When the floating slider gets stuck during movement, the signal of limit switch A is disconnected. At this time, limit switch B also has no signal, the circuit is broken, and the machine tool stops running.

[0040] The parallel circuit formed by limit switch A and limit switch B has a partial overlap. The safety margin for the overlapping product parts when leaving the mold is 2mm to 5mm. The limit switches are normally open to avoid circuit disconnection caused by travel error, ensuring safety and reliability.

[0041] The floating slider is equipped with a guide, and the gap between the guide and the guide groove of the front mold structure is controlled between 0.01-0.04mm; the angle between the floating slider and the mold opening angle is between 8-30°.

[0042] This invention is simple to manufacture, low in cost, and fast to inspect. It solves the problem of floating slide rails not popping out, and is safer, providing better protection for the slider and core-pulling structure.

[0043] The mold device and its protection system of this invention are reasonably designed. The limit switch is integrated on the outside of the floating slider, occupying little space inside the mold. During the movement of the floating slider, if the floating slider does not move, the limit switch A will open, which will cause the machine tool to disconnect the mold opening signal and stop the machine tool. The response time is extremely fast, which can effectively avoid the problem of mold collision caused by the floating slider not popping out. The parallel circuit formed by limit switch A and limit switch B has a partial overlap, which avoids the circuit disconnection caused by the stroke error, making it safe and reliable and reducing safety hazards.

[0044] This invention solves the problem of mold collision caused by floating slider jamming or failure to eject, through "structural integrated design + limit switch linkage control," while achieving a compact mold structure that balances ease of installation and safety. Furthermore, it is simple to manufacture and relatively low in cost. The core of the mold device of this invention consists of four parts: a front mold structure, a rear mold structure, a floating slider, and a limit switch assembly. These components work together to meet the normal ejection requirements of the product and provide a structural foundation for protective functions.

[0045] The structural principle of this device is explained as follows: Front and rear mold structure: The front mold structure includes the front mold frame and the front mold core, and the rear mold structure includes the rear mold frame, the rear mold core and the inner core pull. The rear mold core and the inner core pull are combined to form a complete rear mold core. Its core function is to match the shape of the product, especially for the undercut of the product. The inner core pull design ensures that the product is smoothly demolded and avoids scratching or damaging the product during demolding. Floating slider: It is movably set between the front mold frame and the rear mold frame, and is located on the same side of the two cores. It is a key moving part in the product demolding process. Its movement state directly affects the mold safety and the product demolding effect. In order to ensure the movement accuracy, the floating slider is equipped with a guide structure. The gap between the guide and the front mold guide groove is controlled at 0.01-0.04mm. At the same time, the angle between the floating slider and the mold opening is controlled at 8-30° to ensure smooth movement and no jamming.

[0046] Limit switch assembly: As the core actuator for protection function, it is integrated and fixed on the outside of the floating slider (installed through the limit switch fixing block), rather than inside the mold. The core principle is to reduce the space occupied inside the mold by using integrated installation, while realizing the synchronous movement of the limit switch and the floating slider, ensuring real-time monitoring of the movement status of the floating slider.

[0047] The protection system in this solution mainly consists of a "limit switch assembly connected in series with the mold opening signal to form a protection circuit." Through the parallel cooperation of limit switch A and limit switch B, dual monitoring of the floating slider's "motion process" and "positioning state" is achieved, ensuring rapid shutdown in case of abnormalities. The specific logic is as follows: Circuit configuration: Limit switch A and limit switch B are first connected in parallel, and then connected in series with the mold machine tool PLC (mold opening signal) to form a complete protection circuit; normally open limit switches are selected to avoid circuit malfunction due to small travel errors, thus improving protection reliability.

[0048] Normal operating state: In the mold closing state, limit switch A is in contact with the rear mold structure and connects the signal; during the mold opening process, the floating slider moves synchronously with the mold movement, and limit switch A moves with the floating slider, always maintaining contact with the rear mold structure and continuously connecting the signal; when the floating slider moves to the preset stroke point, limit switch B contacts the contact surface of the front mold end block and connects the signal; at this time, the parallel circuit is in a double-connected state, the protection circuit is unobstructed, and the machine tool can normally complete the mold opening and mold exit actions.

[0049] Abnormal operating state: If the floating slider gets stuck during movement and fails to pop out normally, limit switch A will stop moving with the floating slider and lose contact with the rear mold structure, causing the limit switch A signal to disconnect; at this time, the floating slider has not reached the preset stroke point, and limit switch B cannot contact the front mold end block, and its signal is also disconnected; since both limit switches A and B are disconnected, the parallel circuit fails, which in turn causes the entire protection circuit (connected in series with the mold opening signal) to disconnect. The machine tool PLC cannot receive the normal signal and immediately stops running, avoiding the mold collision problem caused by the floating slider not popping out. The response speed is fast and the protection is timely.

[0050] Redundant protection design: The parallel circuit of limit switches A and B has a safety margin of 2-5mm overlap. The core principle is to compensate for travel error. Even if one limit switch has a slight deviation due to factors such as installation accuracy or wear, the other limit switch can still maintain the circuit connection, avoid accidental shutdown, and further improve the reliability of the protection system.

[0051] like Figures 2 to 6 As shown, a preferred embodiment of the present invention is as follows: A limit switch fixing block is set on the outside of the floating slider. Limit switches A and B are fixed side by side on both sides of the fixing block and fixed by bolts and screws (the fixing block is connected to the floating slider through stepped hole bolts, and the limit switches are fixed by fixing holes and screw holes). The principle is to reduce space occupation through integrated installation, while ensuring that the limit switches and the floating slider move synchronously and avoid monitoring errors caused by loose installation.

[0052] Both the upper and lower ends of the front mold end block are provided with right-angle bends. The lower bend is used to fix it to the front mold structure, and the lower surface of the upper bend serves as the contact surface of the limit switch B. The principle is to achieve an integrated design of "fixing + contact" through the bending structure, which not only ensures the stable installation of the front mold end block, but also allows for precise cooperation with the limit switch B, ensuring the accurate transmission of the floating slider positioning signal.

[0053] Limit switch A has an inner boss at its inner end, and its upper surface serves as the contact surface with the rear mold; limit switch B has an outer boss at its outer end, and its upper surface serves as the contact surface with the front mold end block. The principle is that the boss design ensures precise alignment of the contact surfaces, avoids signal misjudgment caused by contact deviation, and improves contact stability.

[0054] Figure 2 This is a schematic diagram of the overall structure of the mold in the closed state. During mold closing, the limit switch signal contacts the rear mold contact surface and is connected in series with the mold opening signal of the machine tool PLC to form a loop. During mold opening, the core puller remains stationary, flush with the rear mold core. When the slider pops out, the limit switch combination pops out accordingly, with limit switch A always maintaining contact with the rear mold contact surface but moving parallel to it, ensuring a smooth circuit. When the slider reaches its position, as... Figure 3As shown, limit switch A disconnects, and at this time, the contact point of limit switch B contacts the contact surface of the front mold fixing block, forming a new circuit, confirming that the spring block has been safely in place.

[0055] Limit switches A and B are connected in parallel and then connected in series with the mold opening signal from the machine tool PLC to form a circuit. When the floating slider approaches the front mold fixing block, the parallel circuit formed by limit switches A and B needs to overlap to avoid circuit disconnection due to stroke error. The safety distance of the overlap needs to be between 2-5mm. That is, the point where the contact point of limit switch A finally separates from the contact surface of the rear mold is when the product part can be completely ejected from the mold, plus a safety distance of 2-5mm. According to the applicable angle range of this slider of 8-30°, the ejection distance needs to be at least greater than 3.5mm.

[0056] During the movement of the slider, if the slider fails to move, the limit switch A will disconnect, which will cause the machine tool to disconnect the mold opening signal and stop the machine tool from running. The response time is extremely fast, which can effectively avoid mold collision caused by the slider not popping out.

[0057] This invention relates to a mold device and protection system with a floating slider protection function. It boasts significant advantages in multiple dimensions, including structural design, safety protection, installation and use, manufacturing cost, and adaptability. It comprehensively solves industry pain points such as easy jamming of traditional mold floating sliders, untimely protection, and large structural space occupation. It balances practicality, reliability, and economy. Specific advantages can be summarized as follows: The core advantage of this solution lies in the comprehensiveness and timeliness of safety protection. By using the parallel design of limit switch A and limit switch B, and connecting them in series with the machine tool PLC mold opening signal to form a complete protection circuit, it achieves full-process dual monitoring of the floating slider's motion status, fundamentally eliminating mold collision accidents caused by the floating slider getting stuck or failing to pop out, and greatly improving the safety of mold use.

[0058] Compared with traditional single protection mechanisms, this solution adopts a parallel linkage of two limit switches. Limit switch A monitors the movement of the floating slider in real time. In the mold-closed state, it maintains contact with the rear mold structure. During the mold-opening process, it moves synchronously with the floating slider and continuously connects the signal to ensure that the slider movement is monitorable throughout. Limit switch B is responsible for monitoring the position status of the floating slider. When the slider reaches the preset stroke point, it accurately contacts the front mold end block and connects the signal. The two work together to achieve dual protection of "process monitoring + position confirmation", avoiding the safety hazards caused by the failure of a single limit switch or monitoring blind spot.

[0059] Meanwhile, the solution incorporates a 2-5mm safety margin for parallel circuit overlap and selects normally open limit switches to effectively compensate for travel errors caused by factors such as installation accuracy deviations and component wear. This prevents machine tool shutdowns due to accidental circuit disconnection, further enhancing the reliability of the protection system and ensuring stable protection performance of the mold during long-term use. If the floating slider experiences abnormalities such as jamming, both limit switches A and B will disconnect, immediately cutting off the protection circuit and causing the machine tool to stop quickly. The response speed is extremely fast, minimizing damage to the mold, machine tool, and products and reducing production safety risks.

[0060] In terms of structural design, the solution adopts an integrated design approach, fixing the limit switch assembly as a whole on the outside of the floating slider rather than inside the mold. This design greatly saves the internal space of the mold and solves the problems of space congestion, difficult layout, and interference with other components caused by the traditional limit switch being installed inside the mold. At the same time, it simplifies the internal structure of the mold and provides convenience for the overall layout optimization of the mold.

[0061] The limit switch assembly is integrated and installed using a dedicated limit switch mounting block. Limit switches A and B are fixed side by side on both sides of the mounting block using a bolt and screw fixing method. The mounting block is connected to the floating slider through stepped hole bolts, and the limit switches are fixed through mounting holes and screw holes. The structure is reasonably designed and easy to install. It not only ensures the synchronous movement of the limit switches and the floating slider, avoiding monitoring errors caused by loose installation, but also facilitates later inspection, maintenance and replacement, reducing equipment maintenance costs.

[0062] In addition, the front mold end block adopts a right-angle bending structure, realizing an integrated design of "fixed + contact". The lower bending part ensures that the front mold end block is installed stably and reliably, and the lower surface of the upper bending part is precisely used as the contact surface of limit switch B. Limit switches A and B form contact surfaces through the design of inner boss and outer boss respectively, ensuring accurate and stable contact, avoiding signal misjudgment caused by contact deviation, and further improving the operational stability of the device.

[0063] Regarding product demolding performance, the solution optimizes the design of the front and rear mold structures. The rear mold core and inner core-pulling mechanism combine to form a complete integrated core structure for the rear mold, specifically designed for the undercut area. This ensures smooth demolding, effectively preventing scratches and damage during the demolding process, improving product molding quality and demolding efficiency. It adapts to the production needs of various products with undercut structures, expanding the mold's applicability. Simultaneously, the floating slider is equipped with a dedicated guiding structure. The gap between the guide and the front mold guide groove is strictly controlled between 0.01-0.04mm, and the angle between the floating slider and the mold opening angle is controlled between 8-30°. This precise design ensures the smoothness and accuracy of the floating slider's movement, reduces friction and jamming during slider movement, extends the service life of the floating slider and the overall mold, and reduces mold wear costs.

[0064] In terms of manufacturing cost and practicality, the solution boasts a simple overall structure and straightforward manufacturing process. It eliminates the need for complex processing equipment and high-precision special components. The limit switches, fixing blocks, bolts, and other components used are all standard, readily available, and inexpensive, effectively controlling mold manufacturing costs and facilitating mass production and widespread application. Furthermore, the solution offers a simple installation process, requiring no large-scale modification to existing mold structures. It is highly adaptable, allowing for flexible adjustment of the limit switch installation position, floating slider guide clearance, and mold opening angle according to different mold specifications and product requirements, demonstrating strong versatility. In addition, the solution enables rapid inspection; operators can quickly determine the floating slider's movement based on the limit switch signal status, promptly identifying and addressing anomalies. This reduces the difficulty and time cost of troubleshooting equipment malfunctions, thereby improving production efficiency.

[0065] In summary, this solution organically combines safety protection, structural optimization, convenience and practicality with cost control. It not only solves the pain points of traditional mold floating sliders, such as insufficient protection, cumbersome structure, and large space occupation, but also improves the operational stability of molds, product molding quality and production efficiency, while reducing manufacturing and maintenance costs. It has extremely high industry application value and can provide mold manufacturing enterprises with a safe, efficient and economical solution, promoting the technological upgrading and optimized development of the mold industry.

[0066] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0067] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A mold assembly, comprising a front mold structure, a rear mold structure, and a floating slider, wherein the floating slider is movably disposed between the front mold structure and the rear mold structure, characterized in that: The floating slider is equipped with a limit switch assembly on its outer side, and the limit switch assembly is connected in series with the mold opening signal to form a protection circuit.

2. The mold device as described in claim 1, characterized in that: The front mold structure includes a front mold frame and a front mold core disposed within the front mold frame. The rear mold structure includes a rear mold frame and a rear mold core disposed within the rear mold frame. A floating slider is disposed between the front mold frame and the rear mold frame and is located on the same side of the two cores. A limit switch assembly is fixed on the outer surface of the floating slider.

3. The mold device as described in claim 1, characterized in that: The limit switch assembly includes limit switch A and limit switch B. Limit switch A has a limit switch A contact surface that contacts the rear mold structure, and a front mold end block is provided on the outer side of the front mold structure. Limit switch B has a limit switch B contact surface that contacts the front mold end block.

4. The mold device as described in claim 3, characterized in that: The outer surface of the floating slider is provided with a limit switch fixing block, and limit switches A and B are fixedly installed on opposite sides of the limit switch fixing block.

5. The mold device as described in claim 3, characterized in that: The lower end of the front mold end block is fixed to the front mold structure, and the upper end of the front mold end block has a bent portion. The lower surface of the bent portion forms a front mold end block contact surface that mates with the contact surface of the limit switch B.

6. The mold device as described in claim 4, characterized in that: Limit switches A and B are arranged side by side and are respectively fixed to the corresponding sides of the limit switch fixing block by fasteners.

7. The mold apparatus as described in claim 5, characterized in that: The limit switch A has an inner boss at its inner end, and the upper surface of the inner boss forms the contact surface of the limit switch A. The limit switch B has an outer boss at its outer end, and the upper surface of the outer boss forms the contact surface of the limit switch B.

8. A protection system for a mold device as described in claim 7, characterized in that: Limit switches A and B are connected in parallel and then connected in series with the machine tool PLC to form a protection system. Limit switch A contacts the rear mold structure when the mold is closed and moves together with the floating slider during its movement, always maintaining contact with the rear mold structure. When the floating slider reaches its stroke point, limit switch B contacts the signal block set on the front mold, indicating that the floating slider has reached its position. When the floating slider gets stuck during its movement, the signal of limit switch A is disconnected, and limit switch B also has no signal, the circuit is broken, and the machine tool stops running.

9. The protection system as described in claim 8, characterized in that: The parallel circuit formed by limit switch A and limit switch B has a partial overlap, and the safety margin for the overlapping product parts when leaving the mold is 2mm to 5mm.

10. The protection system as described in claim 9, characterized in that: The floating slider is equipped with a guide, and the gap between the guide and the guide groove of the front mold structure is controlled between 0.01-0.04mm.

Images