A new injection molding part shaping tool

Abstract

The utility model discloses a novel injection molding part shaping frock belongs to injection molding part processing equipment technical field. The device includes the fixed platform, the upper surface fixed mounting of fixed platform has the base, the upper surface fixed mounting of base has the profiling lower mould, and the outer periphery of base is equipped with the protective cover, the upper inner wall fixed mounting of protective cover has the cylinder, and the output of cylinder is connected with the profiling upper mould, and the profiling lower mould corresponds with the profiling upper mould up and down, the upper surface of fixed platform is equipped with the controller, the profiling upper mould is equipped with pressure sensor, the pressure sensor is equipped with several, and respectively is located the central position and the edge position of profiling upper mould, and through the cooperation between pressure sensor and controller, proportional valve, cylinder, realized the accurate control of profiling upper mould pressure, avoided the injection molding part and appeared the condition that the shaping effect was not good because of uneven or too big too small pressure, made the part stress more uniform, reasonable, and improved the shaping quality and stability.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding parts processing equipment, and in particular to a novel injection molding parts shaping fixture. Background Technology

[0002] In the field of injection molded parts processing, injection molded parts need to be shaped using fixtures to eliminate deformation caused by material shrinkage and stress release during the molding process, in order to ensure the dimensional accuracy and appearance quality of the parts. Currently, the mainstream injection molded parts shaped fixtures in the industry are usually based on a fixed platform as the basic load-bearing structure. A base is mounted on the fixed platform, and a lower mold is fixed on the upper surface of the base to place the part to be shaped. The outer periphery of the base is usually equipped with a protective cover to prevent dust and provide protection. A cylinder is installed on the top or inner wall of the protective cover. The output end of the cylinder is connected to the upper mold corresponding to the lower mold. The upper mold is driven by the cylinder to press down, which, together with the lower mold, clamps and shapes the part, meeting the shaping processing requirements of conventional injection molded parts.

[0003] Existing injection molding part shaping fixtures typically rely on simple cylinders to directly drive the upper mold to apply pressure to the part, thus completing the injection molding process. However, they lack precise pressure monitoring and dynamic adjustment mechanisms. Due to the inability to accurately control the applied pressure, the pressure exerted by the upper mold on the part during the shaping process is prone to unevenness, excessiveness, or insufficiency, leading to poor shaping results, such as localized deformation and insufficient shaping. This severely affects the shaping quality and stability. Furthermore, during the cooling process after injection molding, the cooling structure is often a simple linear cooling pipe rather than a structure arranged around the lower mold area. As the cooling medium flows through it, it is difficult to achieve a comprehensive and uniform flow around the part. This results in the cooling medium not efficiently removing heat from the part, leading to slow cooling and shaping speed, long shaping time, low production efficiency, and poor cooling effect. Uneven cooling also negatively impacts the shaping quality. Utility Model Content

[0004] This utility model provides a novel injection molding part shaping fixture, which can solve the problem of difficult precise control of pressure in existing injection molding part shaping fixtures.

[0005] A novel injection molding part shaping fixture includes a fixed platform, a base fixedly mounted on the upper surface of the fixed platform, a lower mold fixedly mounted on the upper surface of the base, a protective cover on the outer periphery of the base, the protective cover fixedly mounted on the fixed platform, a cylinder fixedly mounted on the upper inner wall of the protective cover and arranged vertically, the output end of the cylinder connected to the upper mold, the lower mold corresponding vertically to the upper mold, a controller on the upper surface of the fixed platform, and several pressure sensors on the upper mold, located at the center and edge of the upper mold respectively, with the detection surface of the pressure sensors flush with the lower surface of the upper mold. The controller is electrically connected to the pressure sensors, and a proportional valve adapted to the cylinder is also provided inside the protective cover, the proportional valve being electrically connected to the controller.

[0006] Preferably, the lower mold for contouring is provided with a first ear plate on both sides, and the upper mold for contouring is provided with a second ear plate on both sides. The first ear plate and the second ear plate correspond one-to-one, and holes are provided on both the first ear plate and the second ear plate.

[0007] Preferably, the protective cover is provided with a guide post, the diameter of which is the same as the diameter of the hole. One end of the guide post is fixedly connected to the upper surface of the base, and the other end is fixedly connected to the upper inner wall of the protective cover. The guide post passes through the holes of the corresponding first ear plate and second ear plate. The contouring upper mold slides in the vertical direction through the cooperation of the second ear plate and the guide post.

[0008] Preferably, the lower mold has a spiral cooling channel arranged around the model area of ​​the lower mold, and the spiral cooling channel has a spiral condenser tube inside.

[0009] Preferably, the upper surface of the base is provided with a cooler, the cooler is fixedly connected to the base by bolts, the inlet end of the spiral condenser tube is connected to the output end of the cooler, and the outlet end of the spiral condenser tube is connected to the input end of the cooler.

[0010] Preferably, an air pump is fixedly installed on the upper surface of the protective cover, the output end of the air pump is connected to an air pipe, the end of the air pipe away from the air pump passes through the wall of the protective cover and is connected to the air inlet of the cylinder, and the proportional valve is connected in series on the air pipe.

[0011] Preferably, a displacement sensor is provided inside the protective cover, the lens of the displacement sensor is arranged facing the output end of the cylinder, and the displacement sensor is electrically connected to the controller.

[0012] Preferably, the lower mold is fixedly connected to the upper surface of the base by bolts, and the bolts pass through the corners of the lower mold and engage with the threads of the base.

[0013] Preferably, the bottom of the cylinder is fixedly connected to the upper inner wall of the protective cover by bolts, and the output end of the cylinder is fixedly connected to the center position of the upper surface of the contour mold.

[0014] Preferably, the controller is fixed to the upper surface of the fixed platform, and the controller is electrically connected to the cylinder, air pump, and cooler.

[0015] The beneficial effects of this invention are as follows: Through the cooperation of a pressure sensor, controller, proportional valve, and cylinder, the pressure sensor monitors the pressure in real time at each contact area between the upper mold and the injection-molded part, transmitting the pressure signal to the controller. The controller then controls the proportional valve to adjust the output pressure of the cylinder based on this signal, achieving precise control of the pressure applied to the upper mold. This avoids poor shaping results caused by uneven or excessive pressure on the injection-molded part, resulting in more uniform and reasonable stress on the part, thus improving shaping quality and stability. Simultaneously, through the cooperation of a spiral cooling channel, spiral condenser tube, and cooler, the spiral cooling channel is arranged around the lower mold area, with the spiral condenser tube placed within it. The cooler circulates the cooling medium within the spiral condenser tube, comprehensively and evenly removing heat from the injection-molded part, accelerating the cooling and shaping speed, shortening the shaping time, improving production efficiency, and ensuring effective cooling and shaping. This results in rapid and uniform cooling and shaping of the part, improving shaping quality and efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of the tooling for shaping injection molded parts of this novel type; Figure 2 for Figure 1 A sectional view along the cutting line AA; Figure 3 A three-dimensional structural diagram of the tooling for shaping injection molded parts without the protective cover.

[0017] Explanation of reference numerals in the attached figures: 1. Fixed platform; 2. Base; 3. Lower mold; 4. Protective cover; 5. Cylinder; 6. Upper mold; 7. Controller; 8. Pressure sensor; 9. Proportional valve; 10. First ear plate; 11. Second ear plate; 12. Hole; 13. Guide post; 14. Spiral cooling channel; 15. Spiral condenser tube; 16. Cooler; 17. Air pump; 18. Air pipe; 19. Displacement sensor. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0019] like Figures 1 to 3As shown in the figure, a novel injection molding part shaping fixture provided by this utility model includes a fixed platform 1. A base 2 is fixedly installed on the upper surface of the fixed platform 1. A lower mold 3 is fixedly installed on the upper surface of the base 2. A protective cover 4 is provided on the outer periphery of the base 2. The protective cover 4 is fixedly installed on the fixed platform 1. A cylinder 5 is fixedly installed on the upper inner wall of the protective cover 4 and is arranged in a vertical direction. The output end of the cylinder 5 is connected to a upper mold 6. The lower mold 3 and the upper mold 6 correspond vertically. A controller 7 is provided on the upper surface of the fixed platform 1. A pressure sensor 8 is provided on the upper mold 6. Several pressure sensors 8 are provided and are respectively located at the center and edge of the upper mold 6. The pressure sensors 8 are connected to the upper mold 6 by means of embedding, so that the detection surface of the pressure sensor 8 is flush with the lower surface of the upper mold 6. Multiple pressure sensors 8, distributed at the center and edges of the upper mold 6, are installed to comprehensively monitor the pressure in different areas when the upper mold 6 contacts the injection molded part. The controller 7 is electrically connected to the pressure sensors 8 and can receive the pressure signals transmitted by the pressure sensors 8. The proportional valve 9 is electrically connected to the controller 7 and is adapted to the cylinder 5. Thus, the controller 7 can control the proportional valve 9 to adjust the output pressure of the cylinder 5 based on the pressure information fed back by the pressure sensors 8, thereby achieving precise control of the pressure applied to the upper mold 6. This avoids poor shaping effect of the injection molded part due to uneven pressure or excessive or insufficient pressure, and makes the force on the injection molded part more uniform and reasonable during the shaping process, improving the quality and stability of the shaping. The controller 7 is electrically connected to the pressure sensors 8, and the protective cover 4 is also equipped with a proportional valve 9 adapted to the cylinder 5. The proportional valve 9 is electrically connected to the controller 7.

[0020] The lower mold 3 is provided with first ear plates 10 on both sides, and the upper mold 6 is provided with second ear plates 11 on both sides. The first ear plates 10 and the lower mold 3, and the second ear plates 11 and the upper mold 6 can be fixedly connected by welding or other means. The first ear plates 10 and the second ear plates 11 correspond one-to-one, and both have holes 12. The design of the first ear plates 10 and the second ear plates 11, and the holes 12 on them, provides a structural basis for subsequent cooperation with the guide post 13, facilitates the guidance of the movement of the upper mold 6, and ensures the accuracy of the upper mold 6 and the lower mold 3 when they are closed. The first ear plates 10 and the second ear plates 11 correspond one-to-one, and both the first ear plates 10 and the second ear plates 11 have holes 12.

[0021] The protective cover 4 is equipped with a guide post 13. One end of the guide post 13 is fixed to the upper surface of the base 2, and the other end is fixed to the upper inner wall of the protective cover 4 by means of bolts or other methods. The diameter of the guide post 13 is the same as the diameter of the hole 12, and it passes through the holes 12 of the corresponding first ear plate 10 and second ear plate 11. The upper mold 6 slides vertically through the cooperation of the guide post 13 with the second ear plate 11. This design can guide the up and down movement of the upper mold 6 and prevent the upper mold 6 from moving under the drive of the cylinder 5. The offset is generated to ensure that the upper mold 6 can accurately close with the lower mold 3, improve the mold closing accuracy of the shaping tooling, and thus ensure the shaping quality of the injection molded parts. The diameter of the guide post 13 is the same as the diameter of the hole 12. One end of the guide post 13 is fixedly connected to the upper surface of the base 2, and the other end is fixedly connected to the upper inner wall of the protective cover 4. The guide post 13 passes through the holes 12 of the corresponding first ear plate 10 and second ear plate 11. The upper mold 6 slides in the vertical direction through the cooperation of the second ear plate 11 and the guide post 13.

[0022] The lower mold 3 is provided with a spiral cooling channel 14, which is arranged around the model area of ​​the lower mold 3. This layout allows the cooling medium to flow more comprehensively through the model area of ​​the lower mold 3, uniformly cooling the injection molded parts placed on the lower mold 3. The spiral cooling channel 14 is provided with a spiral condenser tube 15, which is adapted to the spiral cooling channel 14. Cooling medium can be introduced into it to quickly remove the heat of the injection molded parts through heat exchange, accelerate the cooling and setting speed of the injection molded parts, shorten the setting time, and improve production efficiency. The spiral cooling channel 14 is arranged around the model area of ​​the lower mold 3, and the spiral cooling channel 14 is provided with a spiral condenser tube 15.

[0023] The upper surface of the base 2 is provided with a cooler 16, which is fixedly connected to the base 2 by bolts to ensure the stability of the cooler 16 installation. The inlet end of the spiral condenser tube 15 is connected to the output end of the cooler 16, and the outlet end is connected to the input end of the cooler 16, forming a circulation loop. The cooler 16 can cool the cooling medium in the spiral condenser tube 15, so that the cooling medium can maintain a low temperature continuously, thereby continuously and effectively cooling the injection molded parts on the lower mold 3, ensuring the cooling and shaping effect, and enabling the injection molded parts to cool and shape quickly and evenly, improving the shaping quality and efficiency. The cooler 16 is fixedly connected to the base 2 by bolts, the inlet end of the spiral condenser tube 15 is connected to the output end of the cooler 16, and the outlet end of the spiral condenser tube 15 is connected to the input end of the cooler 16.

[0024] An air pump 17 is fixedly installed on the upper surface of the protective cover 4. The air pump 17 is fixedly installed on the upper surface of the protective cover 4, and its output end is connected to an air pipe 18. The end of the air pipe 18 away from the air pump 17 passes through the wall of the protective cover 4 and is connected to the air inlet of the cylinder 5, providing compressed air as a power source for the cylinder 5. A proportional valve 9 is connected in series with the air pipe 18 and is electrically connected to the controller 7. In this way, the controller 7 can adjust the pressure and flow rate of the compressed air in the air pipe 18 by controlling the proportional valve 9, thereby accurately controlling the output force and movement speed of the cylinder 5, making the movement of the upper mold 6 and the pressure applied to the injection molded parts more precise and stable, ensuring the stability and shaping quality of the injection molded parts. The output end of the air pump 17 is connected to the air pipe 18, and the end of the air pipe 18 away from the air pump 17 passes through the wall of the protective cover 4 and is connected to the air inlet of the cylinder 5. The proportional valve 9 is connected in series with the air pipe 18.

[0025] The protective cover 4 is equipped with a displacement sensor 19. The displacement sensor 19 is installed inside the protective cover 4 with its lens facing the output end of the cylinder 5. It is used to detect the displacement of the output end of the cylinder 5. The displacement sensor 19 is electrically connected to the controller 7 and can transmit the detected displacement signal to the controller 7. The controller 7 can control the movement of the cylinder 5 more accurately based on the displacement signal, combined with the pressure signal of the pressure sensor 8, etc., to ensure the accurate movement stroke of the upper mold 6, so that the upper mold 6 and the lower mold 3 are closed in place, and the pressure applied to the injection molded parts is more precise, thereby improving the control accuracy of the shaping tooling and the shaping effect of the injection molded parts. The lens of the displacement sensor 19 is arranged facing the output end of the cylinder 5, and the displacement sensor 19 is electrically connected to the controller 7.

[0026] The lower mold 3 is fixedly connected to the upper surface of the base 2 by bolts. The bolts pass through the corners of the lower mold 3 and are threaded into the base 2. This connection method can ensure the stability of the lower mold 3 installed on the base 2, so that the lower mold 3 remains stable during the molding process of the injection molded part and will not be displaced or loosened due to stress or other factors. It provides a reliable foundation support for the stable molding of the injection molded part and ensures the molding quality. The lower mold 3 is fixedly connected to the upper surface of the base 2 by bolts. The bolts pass through the corners of the lower mold 3 and are threaded into the base 2.

[0027] The bottom of the cylinder 5 is fixedly connected to the upper inner wall of the protective cover 4 by bolts to ensure the stability of the cylinder 5 installation and enable the cylinder 5 to output power stably during operation. The output end of the cylinder 5 is fixedly connected to the center position of the upper surface of the upper mold 6. This connection position allows the driving force of the cylinder 5 to be transmitted to the upper mold 6 more evenly, preventing the upper mold 6 from tilting or shifting due to uneven force, ensuring that the upper mold 6 can accurately and smoothly close with the lower mold 3, and ensuring the shaping effect of the injection molded parts. The bottom of the cylinder 5 is fixedly connected to the upper inner wall of the protective cover 4 by bolts, and the output end of the cylinder 5 is fixedly connected to the center position of the upper surface of the upper mold 6.

[0028] The controller 7 is fixed to the upper surface of the fixed platform 1 for easy operation and maintenance. The controller 7 is electrically connected to the cylinder 5, the air pump 17, and the cooler 16. In this way, the controller 7 can centrally control and coordinate the movement of the cylinder 5, the air supply of the air pump 17, and the cooling operation of the cooler 16, so that the various components of the molding fixture can work together to achieve precise control of pressure, power supply, and cooling during the molding process of injection molded parts. This improves the automation level and working stability of the molding fixture, and ensures the molding quality and production efficiency of injection molded parts. The controller 7 is fixed to the upper surface of the fixed platform 1 and is electrically connected to the cylinder 5, the air pump 17, and the cooler 16.

[0029] In summary, the novel injection molding part shaping fixture provided by this utility model operates as follows: During the injection molding part shaping process, the part to be shaped is first placed in the model area of ​​the lower mold 3. The fixture is then started via controller 7, at which point air pump 17 begins operation. The generated compressed air is delivered to cylinder 5 via air pipe 18. Controller 7, according to preset parameters, adjusts the pressure and flow rate of the compressed air in air pipe 18 via proportional valve 9, thereby controlling the extension speed and thrust of the cylinder 5's output end, driving the upper mold 6 to move vertically downwards along guide post 13. Furthermore, the guide post 13 restricts the movement direction of the upper mold 6 to prevent it from deviating, ensuring that the upper mold 6 is accurately aligned with the lower mold 3. When the upper mold 6 contacts the injection molded part, the pressure sensors 8 at its center and edge positions synchronously collect real-time pressure data of each contact area and transmit the data to the controller 7. The controller 7 analyzes the pressure data. If the pressure in a certain area exceeds or falls below a preset threshold (e.g., due to differences in part shape causing excessively high edge pressure or excessively low center pressure), it immediately sends an adjustment signal to the proportional valve 9, adjusting the input air pressure of the fine-tuning cylinder 5 to... The pressure on the part is made more uniform in all areas of the upper mold 6, preventing deformation or damage due to improper local stress. Simultaneously, the displacement sensor 19 detects the displacement at the output of the cylinder 5 in real time and feeds the displacement signal back to the controller 7. The controller 7 uses this signal to determine the mold-closing position of the upper mold 6. When the upper mold 6 reaches the preset mold-closing depth, the cylinder 5 is controlled to maintain the current pressure, entering the shaping and pressure-holding stage. During this process, the cooler 16 is activated, delivering the cooling medium to the spiral condenser tube 15 inside the lower mold 3. Because the spiral condenser tube 15 surrounds the model area… The cooling medium is evenly distributed across the key areas of the lower mold 3, quickly removing heat from the injection molded parts through heat exchange and accelerating the cooling and shaping of the parts. After heat exchange, the cooling medium flows back to the cooler 16 along the condenser pipe, is cooled, and then recycled to ensure the continuity and stability of the cooling effect. When the shaping time reaches the preset value, the controller 7 controls the proportional valve 9 to adjust the air pressure, causing the output end of the cylinder 5 to retract and drive the upper mold 6 to reset upward along the guide post 13. Then, the operator takes out the shaped part, and the tooling completes one shaping operation, which can proceed to the next round of operation.

[0030] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A novel injection molding part shaping fixture, comprising a fixed platform (1), a base (2) fixedly mounted on the upper surface of the fixed platform (1), a contour lower mold (3) fixedly mounted on the upper surface of the base (2), a protective cover (4) provided on the outer periphery of the base (2), the protective cover (4) fixedly mounted on the fixed platform (1), a cylinder (5) fixedly mounted on the upper inner wall of the protective cover (4) and arranged in a vertical direction, the output end of the cylinder (5) connected to a contour upper mold (6), the contour lower mold (3) corresponding vertically to the contour upper mold (6), and a controller (7) provided on the upper surface of the fixed platform (1), characterized in that: The upper mold (6) is provided with a pressure sensor (8). There are several pressure sensors (8), which are respectively located at the center and edge of the upper mold (6). The detection surface of the pressure sensor (8) is flush with the lower surface of the upper mold (6). The controller (7) is electrically connected to the pressure sensor (8). The protective cover (4) is also provided with a proportional valve (9) adapted to the cylinder (5). The proportional valve (9) is electrically connected to the controller (7).

2. The novel injection molding part shaping fixture according to claim 1, characterized in that: The lower mold (3) is provided with a first ear plate (10) on both sides, and the upper mold (6) is provided with a second ear plate (11) on both sides. The first ear plate (10) and the second ear plate (11) correspond one-to-one, and holes (12) are provided on the first ear plate (10) and the second ear plate (11).

3. The novel injection molding part shaping fixture according to claim 2, characterized in that: The protective cover (4) is provided with a guide post (13). The diameter of the guide post (13) is the same as the diameter of the hole (12). One end of the guide post (13) is fixedly connected to the upper surface of the base (2), and the other end is fixedly connected to the upper inner wall of the protective cover (4). The guide post (13) passes through the holes (12) of the corresponding first ear plate (10) and second ear plate (11). The contour upper mold (6) slides in the vertical direction through the cooperation of the second ear plate (11) and the guide post (13).

4. The novel injection molding part shaping fixture according to claim 1, characterized in that: The lower mold (3) is provided with a spiral cooling channel (14), which is arranged around the model area of ​​the lower mold (3). The spiral cooling channel (14) is provided with a spiral condenser (15).

5. A novel injection molding part shaping fixture according to claim 4, characterized in that: The upper surface of the base (2) is provided with a cooler (16), which is fixedly connected to the base (2) by bolts. The inlet end of the spiral condenser tube (15) is connected to the output end of the cooler (16), and the outlet end of the spiral condenser tube (15) is connected to the input end of the cooler (16).

6. A novel injection molding part shaping fixture according to claim 1, characterized in that: An air pump (17) is fixedly installed on the upper surface of the protective cover (4). The output end of the air pump (17) is connected to an air pipe (18). The end of the air pipe (18) away from the air pump (17) passes through the wall of the protective cover (4) and is connected to the air inlet of the cylinder (5). The proportional valve (9) is connected in series on the air pipe (18).

7. A novel injection molding part shaping fixture according to claim 1, characterized in that: The protective cover (4) is equipped with a displacement sensor (19), the lens of the displacement sensor (19) is arranged facing the output end of the cylinder (5), and the displacement sensor (19) is electrically connected to the controller (7).

8. A novel injection molding part shaping fixture according to claim 1, characterized in that: The lower mold (3) is fixedly connected to the upper surface of the base (2) by bolts. The bolts pass through the corners of the lower mold (3) and then engage with the base (2) by threads.

9. A novel injection molding part shaping fixture according to claim 1, characterized in that: The bottom of the cylinder (5) is fixedly connected to the upper inner wall of the protective cover (4) by bolts, and the output end of the cylinder (5) is fixedly connected to the center position of the upper surface of the contour mold (6).

10. A novel injection molding part shaping fixture according to claim 1, characterized in that: The controller (7) is fixed on the upper surface of the fixed platform (1), and the controller (7) is electrically connected to the cylinder (5), the air pump (17), and the cooler (16).

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