An injection mold suitable for complex curved surface parts

Abstract

The utility model discloses a kind of injection mould suitable for complex curved surface parts, including fixed mould and movable mould, the fixed mould and movable mould form cavity in cooperation, adjustable parting plane assembly is equipped between the fixed mould and movable mould, the adjustable parting plane assembly includes multiple sliding blocks distributed along curved surface profile, the sliding block is driven along guide slide rail and moves by servo motor, the sliding block surface is equipped with the forming surface matched with complex curved surface, adjacent the sliding block is connected by flexible seal between. Adjustable parting plane assembly cooperation servo motor and controller, realize sliding block accurate regulation, without replacing mould can be adapted to different complex curved surface parts, greatly improve versatility and flexible production capacity, reduce cost and die changing time. With shape cooling channel and core integration molding, combined with water cooling section, cold gas section and temperature sensing flow regulation, realize uniform cooling and fine temperature control, reduce internal stress and deformation.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold suitable for complex curved surface parts. Background Technology

[0002] In the injection molding production of complex curved surface parts, traditional injection molds have many technical limitations. Existing molds mostly have fixed parting surfaces, requiring custom-made molds for curved surface parts with different curvatures and contours. This results in long production cycles, high costs, and difficulty in adapting to flexible production needs. During the molding of complex curved surfaces, the sealing performance and positioning accuracy of the cavity are difficult to guarantee, and the parting surface is prone to displacement due to injection pressure, causing dimensional deviations or melt leakage. Regarding the cooling system, traditional straight or simple curved cooling channels cannot closely conform to the complex curved surface contours, leading to uneven cooling rates in different parts of the part, which can easily cause defects such as internal stress and deformation. During the demolding stage, the concentrated ejection force of a single ejection mechanism can easily damage the part, and the inner wall of the cavity is prone to adhesion to the melt, further reducing the demolding success rate and the surface quality of the part. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides an injection mold suitable for complex curved surface parts, which can effectively solve the problems raised in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An injection mold suitable for complex curved surface parts includes a fixed mold and a moving mold. The fixed mold and the moving mold cooperate to form a cavity. An adjustable parting surface assembly is provided between the fixed mold and the moving mold. The adjustable parting surface assembly includes a plurality of sliding blocks distributed along the contour of the curved surface. The sliding blocks are driven by a servo motor to move along a guide rail. The surface of the sliding blocks is provided with a molding surface that matches the complex curved surface. Adjacent sliding blocks are connected by a flexible sealing element.

[0006] The cavity is integrated with a spiral conformal cooling channel, which is integrally formed with the core. The bottom of the moving mold is provided with a multi-stage ejection mechanism, which includes a first-stage ejector pin, a second-stage ejector pin and a third-stage ejector pin arranged in sequence. The first-stage ejector pin, the second-stage ejector pin and the third-stage ejector pin are driven by independent hydraulic cylinders.

[0007] As a further description of the above technical solution, the conformal cooling channel includes a water-cooled section and a cold air section. The water-cooled section is connected to an external cooling water circulation system, and the cold air section is connected to a compressed air source.

[0008] As a further description of the above technical solution, the multi-stage ejection mechanism also includes a pressure sensor, which is disposed at the head of the ejector pin.

[0009] As a further description of the above technical solution, the core is connected to the moving mold via a positioning pin, and the cavity is slidably connected to the fixed mold via a dovetail groove.

[0010] As a further description of the above technical solution, an anti-retraction component is also provided between the fixed mold and the moving mold. The anti-retraction component includes a limiting slider that cooperates with the sliding block and a cylinder that drives the limiting slider.

[0011] As a further description of the above technical solution, the inner wall of the cavity is coated with a nano-ceramic anti-stick coating, the thickness of which is 5-10μm.

[0012] As a further description of the above technical solution, the servo motor is electrically connected to an external controller, and the controller controls the movement trajectory of the sliding block according to a preset curved surface model.

[0013] As a further description of the above technical solution, the conformal cooling channel is equipped with a flow regulating valve, which is linked to a temperature sensor.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The present invention provides an injection mold suitable for complex curved surface parts, which has at least one of the following beneficial effects during use:

[0016] Adjustable parting surface components, combined with servo motors and controllers, enable precise adjustment of the sliding blocks, allowing adaptation to various complex curved surface parts without mold changes. This significantly improves versatility and flexible production capabilities, reducing costs and mold changeover time. Anti-retrograde components, locating pins, and dovetail groove connections ensure precise cavity positioning, while flexible seals guarantee airtightness, significantly improving molding accuracy. Conformal cooling channels are integrated with the core, combining water cooling sections, air cooling sections, and temperature-sensing flow regulation to achieve uniform cooling and precise temperature control, reducing internal stress and deformation. A multi-stage ejection mechanism equipped with pressure sensors and micro-vibrators, combined with a nano-ceramic anti-stick coating, improves demolding success rate and part integrity. Integrated intelligent components enable automated production, improving efficiency and stability, facilitating digital management, and comprehensively optimizing the production quality and efficiency of complex curved surface parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an injection mold suitable for complex curved surface parts according to the present invention;

[0018] Figure 2 This is a perspective structural diagram of an injection mold suitable for complex curved surface parts according to the present invention;

[0019] Figure 3This is a partial cross-sectional structural diagram of an injection mold suitable for complex curved surface parts according to the present invention.

[0020] Numbering on the map:

[0021] 1. Moving mold; 2. Fixed mold; 3. Adjustable parting surface assembly; 4. Cavity; 5. Multi-stage ejection mechanism; 6. Conformal cooling channel; 7. Water cooling section; 8. Air cooling section; 9. Flow regulating valve; 10. Miniature vibrator; 11. Sliding block; 12. Guide slide rail; 13. Primary ejector pin; 14. Secondary ejector pin; 15. Tertiary ejector pin; 16. Limiting slider. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-3 As shown, this utility model provides an injection mold suitable for complex curved surface parts, including a fixed mold 2 and a moving mold 1. The fixed mold 2 and the moving mold 1 cooperate to form a cavity 4. An adjustable parting surface assembly 3 is provided between the fixed mold 2 and the moving mold 1. The adjustable parting surface assembly 3 includes a plurality of sliding blocks 11 distributed along the curved surface contour. The sliding blocks 11 are driven by a servo motor to move along a guide rail 12. The surface of the sliding blocks 11 is provided with a molding surface that matches the complex curved surface. Adjacent sliding blocks 11 are connected by a flexible sealing element.

[0024] This embodiment applies to injection molds for complex curved surface parts. Through a collaborative workflow of intelligent adjustment, precise molding, efficient cooling, and safe demolding, it enables high-quality injection molding production of complex curved surface parts.

[0025] The adjustable parting surface component 3 is driven by a servo motor to move the sliding block 11. Combined with the controller, the movement trajectory is controlled according to the preset curved surface model, so that the mold can adapt to the production of complex curved surface parts of different shapes and sizes without replacing the whole mold. This greatly improves the versatility and flexible production capability of the mold, and reduces production costs and mold change time.

[0026] The cavity 4 is integrated with a spiral conformal cooling channel 6, which is integrally formed with the core. The bottom of the moving mold 1 is provided with a multi-stage ejection mechanism 5, which includes a first-stage ejector pin 13, a second-stage ejector pin 14 and a third-stage ejector pin 15 arranged in sequence. The first-stage ejector pin 13, the second-stage ejector pin 14 and the third-stage ejector pin 15 are driven by independent hydraulic cylinders.

[0027] An external controller generates control commands based on a preset complex curved surface model. The controller, electrically connected to the servo motor, transmits these commands to the servo motor. The servo motor drives multiple sliding blocks 11 distributed along the curved surface contour, moving them along the guide rail 12 to a preset position. At this point, the anti-retraction component activates, and a cylinder drives a limiting slider 16 to cooperate with the sliding blocks 11, fixing and limiting the sliding blocks 11 to prevent them from shifting under subsequent injection pressure. The surfaces of the sliding blocks 11 and the molding surfaces matching the complex curved surface combine with each other, while flexible seals between adjacent sliding blocks 11 ensure a sealed connection, ultimately forming a precise cavity 4 that perfectly matches the shape of the target part. Furthermore, the core is connected to the moving mold 1 via a locating pin, and the cavity 4 is slidably connected to the fixed mold 2 via a dovetail groove, further ensuring the positioning accuracy of the cavity 4 and the core.

[0028] After injection molding, the demolding stage begins, and the multi-stage ejection mechanism 5 at the bottom of the moving mold 1 is activated. The primary ejector pin 13, secondary ejector pin 14, and tertiary ejector pin 15 are driven by independent hydraulic cylinders and eject in a preset sequence. Pressure sensors at the ejector pin heads monitor the ejection pressure in real time, ensuring it remains within a reasonable range to prevent damage to parts due to excessive pressure. Simultaneously, the micro-vibrator 10 at the ejector pin head vibrates at a frequency of 20-50Hz, reducing resistance during ejection. Combined with the nano-ceramic anti-stick coating, this further improves the smoothness of demolding. After demolding, the servo motor drives the sliding block 11 to reset, preparing for the next injection cycle.

[0029] Further explanation is provided: the conformal cooling channel 6 includes a water-cooling section 7 and a cooling air section 8. The water-cooling section 7 is connected to an external cooling water circulation system, and the cooling air section 8 is connected to a compressed air source. The spiral conformal cooling channel 6 integrated inside the cavity 4 begins operation. This channel is integrally formed with the core and can closely conform to the contour of the cavity 4. The conformal cooling channel 6 is divided into a water-cooling section 7 and a cooling air section 8. The water-cooling section 7 is connected to the external cooling water circulation system, and the cooling air section 8 is connected to a compressed air source. A temperature sensor monitors the temperature of the cavity 4 in real time and transmits the signal to the flow regulating valve 9. The flow regulating valve 9 adjusts the flow rate of the cooling medium according to the temperature signal. In the initial stage, cooling water is introduced into the water-cooling section 7 to rapidly cool the melt; when the temperature approaches the set value, compressed air is introduced into the cooling air section 8 for precise temperature control, avoiding stress on the parts due to excessive temperature differences.

[0030] The conformal cooling channel 6 is integrally molded with the core, conforming to the contour of the cavity 4, so that the cooling medium can be evenly applied to all parts of the part. The segmented design of the water cooling section 7 and the air cooling section 8, combined with the linkage control of the flow regulating valve 9 and the temperature sensor, realizes the transformation from rapid cooling to precise temperature control, effectively reducing the internal stress and deformation of the part caused by uneven cooling, and improving the dimensional stability and mechanical properties of the part.

[0031] As a further description of the above technical solution, the multi-stage ejection mechanism 5 also includes a pressure sensor, which is disposed at the head of the ejector pin. The multi-stage ejection mechanism 5 drives different ejector pins to eject in stages through independent hydraulic cylinders, and the pressure sensor monitors the ejection pressure in real time, avoiding damage to parts caused by concentrated ejection force. Furthermore, the core is connected to the moving mold 1 via a locating pin, and the cavity 4 is slidably connected to the fixed mold 2 via a dovetail groove. The connection between the core and the moving mold 1 via the locating pin, and the slidable connection between the cavity 4 and the fixed mold 2 via the dovetail groove, ensures the positioning accuracy of the cavity 4 and the core; the flexible seal between the sliding blocks 11 ensures the sealing of the cavity 4, preventing melt leakage from affecting the molding accuracy. These structures work together to significantly improve the molding accuracy of complex curved surface parts.

[0032] Furthermore, an anti-displacement component is provided between the fixed mold 2 and the moving mold 1. The anti-displacement component includes a limiting slider 16 that cooperates with the sliding block 11 and a cylinder that drives the limiting slider 16. The limiting slider 16 of the anti-displacement component cooperates with the cylinder to effectively prevent the sliding block 11 from shifting under injection pressure.

[0033] Furthermore, the inner wall of the cavity 4 is coated with a nano-ceramic anti-stick coating with a thickness of 5-10 μm. After the fixed mold 2 and the moving mold 1 complete the mold closing action, the injection molding machine injects the molten plastic into the cavity 4. During the injection and holding pressure processes, the 5-10 μm nano-ceramic anti-stick coating on the inner wall of the cavity 4 plays a role in reducing the adhesion between the melt and the cavity 4 wall. At the same time, the sliding block 11 remains stable under the limiting action of the anti-retraction component, ensuring that the shape of the cavity 4 remains unchanged and providing a stable molding space for the melt.

[0034] Furthermore, the servo motor is electrically connected to an external controller, which controls the movement trajectory of the sliding block 11 according to a preset curved surface model. The integrated application of intelligent components such as the servo motor, controller, temperature sensor, flow regulating valve 9, and pressure sensor enables automated cavity 4 adjustment, cooling control, and demolding operations. The entire production process can be automatically run through a preset program, reducing manual intervention, improving production efficiency and stability, and facilitating digital monitoring and management of the production process.

[0035] Furthermore, the conformal cooling channel 6 is equipped with a flow regulating valve 9, which is linked to a temperature sensor.

[0036] Furthermore, the ejector pin head is equipped with a micro-vibrator 10, the vibration frequency of which is 20-50Hz. The micro-vibrator 10 on the ejector pin head reduces demolding resistance, and the nano-ceramic anti-stick coating reduces the risk of adhesion between the part and the cavity 4, significantly improving the demolding success rate and ensuring the surface quality and integrity of the part.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An injection mold suitable for complex curved surface parts, characterized in that: The system includes a fixed mold and a moving mold, which cooperate to form a cavity. The system is characterized in that: an adjustable parting surface assembly is provided between the fixed mold and the moving mold. The adjustable parting surface assembly includes multiple sliding blocks distributed along the curved surface contour. The sliding blocks are driven by a servo motor to move along a guide rail. The surface of the sliding blocks is provided with a molding surface that matches the complex curved surface. Adjacent sliding blocks are connected by a flexible sealing element. The cavity is integrated with a spiral conformal cooling channel, which is integrally formed with the core. The bottom of the moving mold is provided with a multi-stage ejection mechanism, which includes a first-stage ejector pin, a second-stage ejector pin and a third-stage ejector pin arranged in sequence. The first-stage ejector pin, the second-stage ejector pin and the third-stage ejector pin are driven by independent hydraulic cylinders.

2. The injection mold for complex curved surface parts according to claim 1, characterized in that: The conformal cooling channel includes a water-cooled section and a cold air section. The water-cooled section is connected to an external cooling water circulation system, and the cold air section is connected to a compressed air source.

3. The injection mold for complex curved surface parts according to claim 1, characterized in that: The multi-stage ejection mechanism also includes a pressure sensor, which is disposed at the head of the ejector pin.

4. The injection mold for complex curved surface parts according to claim 1, characterized in that: The core is connected to the moving mold via a locating pin, and the cavity is slidably connected to the fixed mold via a dovetail groove.

5. The injection mold for complex curved surface parts according to claim 1, characterized in that: An anti-retraction component is also provided between the fixed mold and the moving mold. The anti-retraction component includes a limiting slider that cooperates with the sliding block and a cylinder that drives the limiting slider.

6. The injection mold for complex curved surface parts according to claim 1, characterized in that: The inner wall of the cavity is coated with a nano-ceramic anti-stick coating with a thickness of 5-10 μm.

7. The injection mold for complex curved surface parts according to claim 1, characterized in that: The servo motor is electrically connected to an external controller, which controls the movement trajectory of the sliding block according to a preset curved surface model.

8. The injection mold for complex curved surface parts according to claim 1, characterized in that: The conformal cooling channel is equipped with a flow regulating valve, which is linked to a temperature sensor.

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