Mold with quick demolding structure design

Abstract

The invention relates to the technical field of molds, in particular to a mold with a quick demolding structure design, which comprises a demolding driving mechanism and a demolding executing mechanism. The demolding driving mechanism is connected with the transmission assembly through the power assembly and drives the ejection unit to achieve high-precision linear motion, and the guide unit ensures the motion stability. A cooling channel is arranged in the die template, a reset spring is arranged at the top of the sliding block, a stress sensor is arranged in the middle of the ejector rod, a damping foot pad is arranged at the bottom, and a protective cover is installed outside. According to the invention, the demoulding guide precision can be obviously improved, the operation steps are shortened, the adaptability is enhanced, the cooling efficiency and the operation stability are optimized, and an efficient and intelligent mould solution is provided for the modern manufacturing industry.

Description

Technical Field

[0001] This invention belongs to the field of mold manufacturing and molding technology, specifically a mold with a quick demolding structure design. Background Technology

[0002] In the mold manufacturing industry, demolding efficiency is one of the key factors affecting industrial production cycles and product quality. Especially in processes such as injection molding, stamping, and sheet metal forming, the design of the mold's demolding structure directly impacts production efficiency and product integrity. However, existing mold structures still suffer from insufficient guiding accuracy, cumbersome operation procedures, and limited adaptability during demolding, making it difficult to fully meet the demands of modern manufacturing for efficient and intelligent molds.

[0003] For example, Chinese invention patent (patent number: CN109822823B) discloses a mold including a template and an ejection assembly. The template has a mold cavity and an ejection groove communicating with the mold cavity. The ejection assembly includes an ejector rod that slides with the ejection groove. The ejector rod guides the undercut by engaging with a sloping shoulder and an inclined wall, causing the undercut to disengage from the undercut groove to complete demolding. This design improves demolding stability to some extent, but it still has limitations: it relies on the engagement of a single sloping shoulder and an inclined wall, and the guiding accuracy is easily affected by machining errors or wear; at the same time, it does not have a quick reset mechanism, requiring manual or additional mechanisms for reset, increasing operational complexity; furthermore, this structure occupies a large space, which is not conducive to the compact design of the overall mold size.

[0004] For example, Chinese invention patent (patent number: CN114953365B) discloses a mold structure, which includes a male mold and a core-pulling mechanism. The core-pulling mechanism consists of a push plate seat, a push plate, a central core pillar, and an ejection guide block. The push plate seat and the push plate slide in two directions respectively, and the product is ejected through the cooperation of the slider and the oblique sliding hole. This structure simplifies the need for long-distance core pulling, but it relies on the complex cooperation relationship between the slider and the oblique sliding hole, which requires high machining accuracy. If the clearance is not properly controlled, it can easily lead to jamming or loosening. At the same time, the drive mechanism needs to precisely control the sliding sequence in two directions, making the control system relatively complex and the maintenance cost high. In addition, this structure is mainly suitable for demolding products with a central core pillar, and its adaptability to products with complex shapes or multi-directional undercuts is poor.

[0005] In summary, while existing mold structures have made some progress in demolding, there is still room for improvement in terms of guiding accuracy, demolding speed, structural compactness, and applicability. Therefore, this invention proposes a mold with a rapid demolding structure design, aiming to provide a novel mold structure that is precise in guiding, rapid in demolding, compact in structure, and highly adaptable. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of insufficient guiding accuracy, cumbersome operation steps, and limited adaptability of existing mold structures during demolding, and to provide a mold design that is precise in guiding, quick in demolding, compact in structure, and highly adaptable.

[0007] To achieve the above objectives and improve the aforementioned problems, the present invention provides a mold with a rapid demolding structure design, including a demolding drive mechanism and a demolding execution mechanism. The demolding drive mechanism includes a power component and a transmission component, the power component being connected to the demolding execution mechanism via the transmission component; the demolding execution mechanism includes an ejection unit and a guide unit, the ejection unit being used to push the molded product out of the mold, and the guide unit being used to ensure the precise and stable movement trajectory of the ejection unit.

[0008] The power assembly includes a drive motor and a reducer. The output shaft of the drive motor is fixedly connected to the input end of the reducer, and the output end of the reducer is connected to a transmission assembly via a coupling. The transmission assembly includes a lead screw and a slider. One end of the lead screw is fixedly connected to the output end of the reducer, and the other end is fixedly installed to the mold frame via a bearing seat. The slider is threadedly connected to the lead screw, and linear guide rails are provided on both sides of the slider, with the linear guide rails fixedly installed on the mold frame.

[0009] The ejection unit includes an ejector rod and a top plate. One end of the ejector rod is fixedly connected to the slider, and the other end passes through the mold template and is fixedly connected to the top plate. The bottom surface of the top plate is provided with multiple elastic support members, which are evenly distributed on the bottom surface of the top plate and fixedly connected to the top plate by bolts. The bottom of each elastic support member is provided with a buffer pad made of highly elastic rubber material, which can reduce the impact force on the product during ejection.

[0010] The guiding unit includes a guide sleeve and a limiting block. The guide sleeve is fixedly installed on the inner wall of the mold template, and the ejector rod passes through the guide sleeve and slides in cooperation with it. The limiting block is fixedly installed on the top of the guide sleeve, and the inner diameter of the limiting block is slightly larger than the outer diameter of the ejector rod, used to limit the offset range of the ejector rod. The inner wall of the guide sleeve is provided with a wear-resistant coating made of polytetrafluoroethylene (PTFE), which can reduce the friction between the ejector rod and the guide sleeve and extend its service life.

[0011] As a preferred technical solution of this application, the mold template has internal cooling channels arranged in a serpentine pattern, with both ends connected to an external cooling system. The inner wall of the cooling channels is coated with an anti-rust coating made of epoxy resin, which can effectively prevent the coolant from corroding the mold template.

[0012] As a preferred technical solution of this application, a return spring is provided on the top of the slider. One end of the return spring is fixedly connected to the slider, and the other end is fixedly connected to the mold frame. The spring force coefficient of the return spring is adjusted according to the actual application scenario, and it can automatically pull the slider back to the initial position after demolding, without manual intervention.

[0013] As a preferred technical solution of this application, a stress sensor is provided in the middle of the push rod, and the stress sensor is connected to an external control module via a signal line. The stress sensor monitors the stress changes on the push rod in real time. When abnormal stress is detected, the control module will issue an alarm and stop the operation of the drive motor, thereby avoiding equipment damage caused by overload.

[0014] As a preferred technical solution of this application, the bottom of the mold frame is provided with shock-absorbing pads made of silicone material, which can absorb the vibration generated during mold operation and improve the stability of the mold. The bottom of the shock-absorbing pads is provided with anti-slip texture, which can enhance the friction between the mold and the ground and prevent the mold from sliding during operation.

[0015] As a preferred technical solution of this application, the transmission assembly further includes a synchronous belt and a synchronous pulley. The synchronous pulley is fixedly installed at one end of the lead screw, and the synchronous belt is wound between the synchronous pulley and the output end of the reducer. The inner side of the synchronous belt has a toothed structure that meshes with the tooth groove of the synchronous pulley, thereby converting the rotational motion of the reducer into the linear motion of the lead screw.

[0016] As a preferred technical solution of this application, a protective cover is provided on the outer side of the mold template. The protective cover is made of transparent acrylic material, which can protect the internal structure of the mold from the influence of external dust and impurities. The top of the protective cover is provided with ventilation holes, and a filter screen is installed in the ventilation holes to ensure air circulation inside the mold and prevent foreign objects from entering.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves high-precision linear motion of the ejector pin by combining a demolding drive mechanism and a demolding execution mechanism with the precision transmission of the lead screw and slider, thus solving the problem of insufficient precision caused by the reliance on a single guide structure in traditional molds. Simultaneously, the synergistic effect of the guide sleeve and the limiting block further improves the motion stability of the ejector pin, avoiding trajectory deviation caused by machining errors or wear.

[0018] By incorporating a return spring at the top of the slider, the mold can automatically reset after demolding, reducing manual intervention and significantly improving production efficiency. Furthermore, the stress sensor in the middle of the ejector pin can monitor stress changes in real time, promptly detecting and addressing abnormalities, thus enhancing the safety and reliability of the mold.

[0019] The optimized cooling channel design inside the mold template improves cooling efficiency. The serpentine arrangement of the channels ensures more even distribution of coolant, shortening product cooling time and accelerating the production cycle. Furthermore, the application of wear-resistant and rust-proof coatings extends the mold's lifespan and reduces maintenance costs.

[0020] The design of shock-absorbing feet and protective covers further enhances the overall performance of the mold. The shock-absorbing feet can effectively absorb vibrations during operation and prevent the mold from being affected by excessive vibrations, thus ensuring the demolding accuracy. The protective cover protects the internal structure of the mold from the influence of the external environment, ensuring the long-term stable operation of the mold.

[0021] In summary, this invention, through a series of innovative structural designs, solves the shortcomings of existing molds in terms of guiding accuracy, demolding speed, structural compactness, and applicability, providing a new type of mold structure that is efficient, intelligent, and highly adaptable for modern manufacturing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the invention, showing the layout of the mold's external frame and main components.

[0023] Figure 2 This is a magnified view of the demolding drive mechanism, highlighting the connection between the power unit, transmission unit, and slider.

[0024] Figure 3 This is a sectional view of the demolding actuator, which shows in detail the structural cooperation between the ejection unit and the guide unit.

[0025] Figure 4 This is a schematic diagram of the internal cooling channels of the mold template, showing the serpentine path of the cooling channels and their connection points with the external cooling system.

[0026] Figure 5 The image shows a 3D view of the protective shield, revealing its transparent material and design details of the top ventilation holes.

[0027] The attached figures are labeled as follows: 1. Mold frame; 2. Drive motor; 3. Reducer; 4. Lead screw; 5. Slider; 6. Linear guide rail; 7. Ejector rod; 8. Ejector plate; 9. Elastic support component; 10. Guide sleeve; 11. Limit block; 12. Cooling channel; 13. Return spring; 14. Stress sensor; 15. Shock-absorbing pad; 16. Synchronous belt; 17. Synchronous pulley; 18. Protective cover. Detailed Implementation

[0028] This invention provides a mold with a quick demolding structure design, the overall structure of which is as follows: Figure 1As shown, the mold includes a mold frame 1, a demolding drive mechanism, and a demolding execution mechanism. The mold frame 1 serves as the basic support structure for the entire mold, integrating the demolding drive mechanism and the demolding execution mechanism. The demolding drive mechanism consists of a power component and a transmission component. The power component includes a drive motor 2 and a reducer 3, while the transmission component includes a lead screw 4, a slider 5, a linear guide rail 6, a synchronous belt 16, and a synchronous pulley 17. The demolding execution mechanism includes an ejection unit and a guiding unit. The ejection unit consists of an ejector rod 7, an ejector plate 8, and an elastic support member 9, while the guiding unit consists of a guide sleeve 10 and a limiting block 11. Furthermore, the mold template has a cooling channel 12, the top of the slider 5 has a return spring 13, the middle of the ejector rod 7 has a stress sensor 14, the bottom of the mold frame 1 has shock-absorbing pads 15, and the exterior has a protective cover 18.

[0029] The drive motor 2 is fixedly installed on one side of the mold frame 1, and its output shaft is connected to the input end of the reducer 3 by a key. The output end of the reducer 3 is connected to one end of the lead screw 4 via a coupling, and the other end of the lead screw 4 is fixedly connected to the mold frame 1 via a bearing seat to ensure that the lead screw 4 remains stable during rotation. The slider 5 is threadedly connected to the lead screw 4, and when the lead screw 4 rotates, the slider 5 moves along the axial direction of the lead screw 4. Linear guide rails 6 are provided on both sides of the slider 5, and the linear guide rails 6 are fixedly installed on the inner wall of the mold frame 1 by bolts to provide guidance for the movement of the slider 5 and ensure that the movement trajectory of the slider 5 is accurate and smooth. The synchronous pulley 17 is fixedly installed on one end of the lead screw 4, and the synchronous belt 16 is wound between the synchronous pulley 17 and the output end of the reducer 3. The inner side of the synchronous belt 16 has a toothed structure that meshes with the tooth groove of the synchronous pulley 17, converting the rotational motion of the reducer 3 into the linear motion of the lead screw 4.

[0030] One end of the ejector rod 7 is fixedly engaged with the slider 5 via a threaded connection, and the other end passes through the mold template and is fixedly connected to the top plate 8 via bolts. Multiple elastic support members 9 are evenly distributed on the bottom surface of the top plate 8. The elastic support members 9 are fixedly connected to the top plate 8 via bolts, and their bottoms are equipped with buffer pads made of highly elastic rubber material. The ejector rod 7 passes through the guide sleeve 10 and slides within it. The guide sleeve 10 is fixedly installed on the inner wall of the mold template via bolts. A limiting block 11 is fixedly installed on the top of the guide sleeve 10 via bolts. The inner diameter of the limiting block 11 is slightly larger than the outer diameter of the ejector rod 7, used to limit the offset range of the ejector rod 7. The inner wall of the guide sleeve 10 is coated with a wear-resistant coating made of polytetrafluoroethylene (PTFE). A stress sensor 14 is embedded in the middle of the ejector rod 7. The stress sensor 14 is connected to an external control module via a signal line for real-time monitoring of stress changes on the ejector rod 7.

[0031] The mold template has internal cooling channels 12 arranged in a serpentine pattern, with both ends connected to an external cooling system, such as... Figure 4As shown. The inner wall of the cooling channel 12 is coated with an anti-rust coating made of epoxy resin. A return spring 13 is provided on the top of the slider 5. One end of the return spring 13 is fixedly connected to the slider 5 by a bolt, and the other end is fixedly connected to the mold frame 1 by a bolt. A shock-absorbing pad 15 is fixedly installed on the bottom of the mold frame 1 by bolts. The shock-absorbing pad 15 is made of silicone material and has anti-slip texture on its bottom. A protective cover 18 is provided on the outside of the mold template. The protective cover 18 is made of transparent acrylic material and has ventilation holes on its top. A filter screen is installed in the ventilation holes, such as... Figure 5 As shown.

[0032] In actual operation, after the drive motor 2 starts, its output shaft drives the reducer 3 to rotate. The output end of the reducer 3 drives the lead screw 4 to rotate through a coupling. The rotational motion of the lead screw 4 is converted into the linear motion of the slider 5 through a threaded connection. The slider 5 moves along the linear guide rail 6. The movement of the slider 5 drives the ejector rod 7 to slide along the guide sleeve 10. The ejector rod 7 pushes the top plate 8 upward, thereby ejecting the molded product from the mold. During this process, the guide sleeve 10 and the limiting block 11 work together to ensure that the movement trajectory of the ejector rod 7 is accurate and stable. The stress sensor 14 in the middle of the ejector rod 7 monitors the stress changes on the ejector rod 7 in real time and transmits the data to the external control module. When abnormal stress is detected, the control module issues an alarm and stops the operation of the drive motor 2.

[0033] After demolding, the return spring 13 pulls the slider 5 back to its initial position, resetting the ejector pin 7 and the ejector plate 8, thus completing one demolding cycle. The coolant in the cooling channel 12 circulates through an external cooling system to cool the mold template, shortening the product's cooling time. The shock-absorbing feet 15 absorb vibrations generated during mold operation, preventing excessive vibration from affecting demolding accuracy. The protective cover 18 protects the internal structure of the mold from external dust and impurities, while ensuring airflow within the mold through ventilation holes.

[0034] This invention achieves efficient mold release through the aforementioned structural design. The connection and fit between the various components ensure the stability and reliability of mold operation. The combination of the drive motor 2, reducer 3, lead screw 4, slider 5, and linear guide 6 provides precise power transmission and guidance. The synergistic effect of the ejector rod 7, ejector plate 8, elastic support 9, guide sleeve 10, and limit block 11 ensures the smoothness of the demolding process. The design of the cooling channel 12, return spring 13, stress sensor 14, shock-absorbing pads 15, and protective cover 18 further optimizes the mold's performance, making it adaptable to various application scenarios.

[0035] To enable those skilled in the art to fully understand and implement this invention, the following supplementary explanation of the implementation principles of this invention is provided in conjunction with specific application scenarios.

[0036] During mold operation, the drive motor 2 is first started via an external control module. The output shaft of the drive motor 2 drives the reducer 3 to rotate. The reducer 3 converts the high-speed rotation of the drive motor 2 into a low-speed, high-torque output, and transmits the power to one end of the lead screw 4 via a coupling. Driven by the reducer 3, the lead screw 4 begins to rotate, and the engagement between its thread and the slider 5 causes the slider 5 to move along the axial direction of the lead screw 4. At this time, the linear guide 6 provides stable guidance for the slider 5, ensuring that the movement trajectory of the slider 5 is accurate and smooth, and that it will not deviate or jam due to external interference. The engagement of the synchronous belt 16 and the synchronous pulley 17 further ensures the synchronicity of the transmission, avoiding the problem of unstable demolding caused by transmission errors.

[0037] As slider 5 moves along linear guide rail 6, push rod 7 slides along guide sleeve 10. The wear-resistant coating on the inner wall of guide sleeve 10 effectively reduces frictional resistance and extends the service life of guide sleeve 10 and push rod 7. Simultaneously, limit block 11 restricts the offset range of push rod 7, ensuring that push rod 7 remains within the preset trajectory during movement. Stress sensor 14 is embedded in the middle of push rod 7. Stress sensor 14 monitors the stress changes on push rod 7 in real time and transmits the data to an external control module. If abnormal stress is detected, such as excessive resistance or jamming of push rod 7, the control module will immediately issue an alarm and stop the operation of drive motor 2, thereby preventing equipment damage or product defects.

[0038] As slider 5 continues to move, push rod 7 pushes top plate 8 upward. Elastic supports 9, evenly distributed on the bottom surface of top plate 8, contact the product through buffer pads made of highly elastic rubber. These buffer pads effectively reduce impact on the product during ejection, preventing damage to the product surface due to excessive ejection force. This design is particularly suitable for products with sensitive surfaces or complex shapes, significantly improving product integrity.

[0039] After demolding is complete, the return spring 13 pulls the slider 5 back to its initial position. The design of the return spring 13 not only simplifies the operation steps but also improves the automation level of the mold. The reset of the slider 5 drives the ejector pin 7 and the ejector plate 8 to return to their initial state synchronously, thus completing a complete demolding cycle. This process requires no manual intervention, significantly shortening the production cycle and improving production efficiency.

[0040] The cooling channels 12 inside the mold template continue to function during demolding. Coolant circulates through an external cooling system, evenly distributing heat along the serpentine cooling channels 12 to rapidly reduce the temperature of the mold template. This design optimizes cooling efficiency, shortens product cooling time, and thus accelerates the overall production pace. The rust-proof coating on the inner wall of the cooling channels 12 effectively prevents the coolant from corroding the mold template, extending the mold's service life.

[0041] The shock-absorbing feet 15 absorb vibrations during mold operation, preventing a decrease in demolding accuracy due to excessive vibration. The anti-slip texture on the bottom enhances friction between the mold and the ground, ensuring mold stability during operation. The protective cover 18 protects the internal structure of the mold from external dust and impurities, while the ventilation holes at the top ensure airflow within the mold, preventing performance degradation due to excessive temperature or humidity.

[0042] In summary, this invention achieves efficient mold release through the aforementioned structural design. The connection and fit relationships between the various components ensure the stability and reliability of mold operation. The combination of the drive motor 2, reducer 3, lead screw 4, slider 5, and linear guide 6 provides precise power transmission and guidance. The synergistic effect of the ejector rod 7, ejector plate 8, elastic support 9, guide sleeve 10, and limit block 11 ensures the smoothness of the demolding process. The design of the cooling channel 12, return spring 13, stress sensor 14, shock-absorbing pads 15, and protective cover 18 further optimizes the mold's performance, making it adaptable to various application scenarios.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mold having a quick demolding structure design, characterized by, The utility model provides a mould frame (1), demoulding drive mechanism and demoulding execution mechanism, the demoulding drive mechanism includes power component and transmission component, power component is connected with demoulding execution mechanism through transmission component, the demoulding execution mechanism includes ejection unit and guide unit, the ejection unit is used for pushing the forming product from the mould, the guide unit is used for ensuring the movement track of ejection unit is accurate and stable.

2. The mold with a quick demolding structural design according to claim 1, characterized in that, The power component includes drive motor (2) and speed reducer (3), the output shaft of drive motor (2) is fixedly connected with the input end of speed reducer (3), the output end of speed reducer (3) is connected with transmission component through shaft coupling, the transmission component includes lead screw (4) and sliding block (5), one end of lead screw (4) is fixedly connected with the output end of speed reducer (3), the other end is fixedly installed with mould frame (1) through bearing seat, sliding block (5) is threadedly connected with lead screw (4), both sides of sliding block (5) are equipped with linear guide rail (6), linear guide rail (6) is fixedly installed on mould frame (1).

3. The mold with a quick demolding structural design according to claim 2, characterized in that, The ejection unit includes ejector rod (7) and top plate (8), one end of ejector rod (7) is fixedly connected with sliding block (5), the other end passes through mould template and is fixedly connected with top plate (8), the bottom surface of top plate (8) is equipped with a plurality of elastic supporting members (9), the elastic supporting members (9) are evenly distributed on the bottom surface of top plate (8) and are fixedly connected with top plate (8) through bolt, the bottom of elastic supporting member (9) is equipped with buffer pad.

4. The mold with a quick demolding structure design according to claim 3, characterized in that, The guide unit includes guide sleeve (10) and limit block (11), the guide sleeve (10) is fixedly installed on the inner wall of mould template, the ejector rod (7) penetrates guide sleeve (10) and is slidably connected with guide sleeve (10), the limit block (11) is fixedly installed on the top of guide sleeve (10), the inner hole diameter of limit block (11) is slightly larger than the outer diameter of ejector rod (7), the inner wall of guide sleeve (10) is equipped with wear-resistant coating.

5. The mold with a quick demolding structural design according to claim 4, characterized in that, The inside of mould template is equipped with cooling channel (12), the cooling channel (12) is arranged in serpentine shape, and both ends are communicated with external cooling system respectively, the inner wall of cooling channel (12) is equipped with rust-proof coating.

6. The mold with a quick demolding structural design according to claim 5, characterized in that, The top of sliding block (5) is equipped with return spring (13), one end of return spring (13) is fixedly connected with sliding block (5), the other end is fixedly connected with mould frame (1).

7. The mold with a quick demolding structural design according to claim 6, characterized in that, The middle part of ejector rod (7) is equipped with stress sensor (14), the stress sensor (14) is connected with external control module through signal line.

8. The mold with a quick demolding structural design according to claim 7, characterized in that, The bottom of mould frame (1) is equipped with shock absorbing foot pad (15), the shock absorbing foot pad (15) is made of silica gel material, and the bottom is equipped with anti-skid line, the outside of mould template is equipped with protective cover (18), the protective cover (18) is made of transparent acrylic material, and the top is equipped with ventilation hole.

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