Foam molding machine

Abstract

The utility model discloses a foam plastic machine which comprises a rack, a movable mold, a fixed mold and a guide rail, the guide rail is fixedly connected with the rack, the movable mold and the fixed mold are both in sliding connection with the guide rail, the movable mold is connected with an electric driving part, the electric driving part drives the movable mold to slide along the guide rail through a transmission mechanism, and the electric driving part drives the movable mold to slide along the guide rail. The movable mold has a mold opening state and a mold closing state under the driving of the electric driving part, the movable mold and the fixed mold are locked in the mold closing state, and the movable mold and the fixed mold are separated in the mold opening state. The foam plastic machine is stable in quality and high in control precision.

Description

Technical Field

[0001] This application relates to the field of foam molding machine technology, and more specifically, to a foam molding machine. Background Technology

[0002] A foam molding machine is an injection molding device that uses thermoplastics, resins, polyurethane, and other materials to heat and melt them, then injects them into the hollow part of the product, filling it with a foaming agent to expand the hollow part into a substantial foam. Its working principle is that while the injection molding process is underway, a foaming agent is sprayed into the injection molding machine cavity. After the molding process, the foaming agent diffuses and decomposes under localized high temperatures, generating bubbles, thereby expanding the plastic into a foam material.

[0003] Currently, hydraulic control technology is one of the key technologies in foam molding machines, mainly used to control the opening and closing of molds and movement. However, while existing hydraulic control systems can achieve relatively complex motion control, they also face many problems. For example, the sealing performance of hydraulic systems is poor, making them prone to leakage and resulting in a high equipment failure rate. Simultaneously, the viscosity of hydraulic oil is greatly affected by temperature changes, making it difficult to guarantee control accuracy, especially in high-temperature environments. These problems not only seriously affect the operational stability of the foam molding machine but also reduce production efficiency and increase maintenance costs. Utility Model Content

[0004] In view of this, this application provides a foam molding machine that uses an electric motor for power drive, which has high control precision, low failure rate, and stable quality.

[0005] This application provides a foam molding machine, including a frame, a moving mold, a fixed mold, and a guide rail. The guide rail is fixedly connected to the frame, the fixed mold is fixedly connected to the frame, and the moving mold is slidably connected to the guide rail. The moving mold is connected to an electric drive component, which drives the moving mold to slide along the guide rail through a transmission mechanism. Under the drive of the electric drive component, the moving mold has an open mold state and a closed mold state. In the closed mold state, the moving mold and the fixed mold are locked together, and in the open mold state, the moving mold and the fixed mold are separated.

[0006] By adopting the technical solution of this application, and replacing the traditional hydraulic control system with an electric drive component and transmission mechanism to control the mold opening and closing actions of the foam molding machine, this technical solution effectively avoids the leakage problems caused by poor sealing performance of the hydraulic system, as well as the decrease in control accuracy caused by the influence of hydraulic oil viscosity on temperature changes. Electric drive systems typically have higher response speeds and more stable control performance, thus significantly improving the working stability and molding accuracy of the foam molding machine. Compared with traditional hydraulic systems, electric drive systems typically have higher energy efficiency ratios, reducing energy consumption. Simultaneously, it avoids the environmental pollution caused by hydraulic oil leakage, aligning with the current concepts of green manufacturing and sustainable development.

[0007] In some implementations, the electric drive component is a motor, which is connected to a speed-changing mechanism.

[0008] By adopting the technical solution of this application, the rapid and accurate opening and closing of the moving mold can be ensured during the injection molding process by precisely controlling the speed and direction of the motor, thus shortening the production cycle. This significantly improves production efficiency, enhances control precision, reduces energy consumption, extends equipment lifespan, and facilitates maintenance and upgrades.

[0009] In some embodiments, the transmission mechanism is a meshing gear and rack, the gear being fixedly connected to the output shaft of the electric drive unit, the electric drive unit being fixedly connected to the frame / moving mold, and the rack being fixedly connected to the moving mold / frame.

[0010] By adopting the above technical solution, the meshing transmission of gears and racks features high efficiency and high precision, ensuring rapid, accurate, and smooth opening and closing of the moving mold. This helps reduce errors and fluctuations during injection molding, improving product quality and consistency. It not only improves the transmission efficiency and precision of the equipment but also enhances the stability and reliability of the structure. This design provides a strong guarantee for the stable operation and efficient production of the foam molding machine.

[0011] In some embodiments, the fixed mold is connected to a demolding baffle, which is slidably connected to the frame.

[0012] By adopting the above technical solutions, not only is the demolding efficiency and flexibility of the foam molding machine improved, but the overall performance and safety of the equipment are also enhanced. This innovative design provides a strong guarantee for the stable operation and efficient production of the foam molding machine.

[0013] In some embodiments, the fixed mold is connected to a demolding rod, the demolding baffle is slidably connected to the demolding rod, and the relative distance between the demolding baffle and the fixed mold is limited by a locking structure.

[0014] By adopting the above technical solution, in the mold-open state, the demolding mechanism in the fixed mold abuts against the demolding baffle, causing the foamed part to be ejected from the mold, which improves the demolding efficiency and flexibility of the foaming machine, and also enhances the stability and reliability of the equipment.

[0015] In some implementations, the locking structure includes a locking member, a plurality of positioning holes provided along the length direction on the demolding rod, and a locking hole provided on the demolding baffle that corresponds one-to-one with the positioning holes. The locking member passes through the positioning holes and the locking holes to restrict the sliding of the demolding baffle.

[0016] By adopting the above technical solution, the locking structure can firmly fix the position of the demolding baffle, preventing it from shaking or misaligning during demolding. This helps to enhance the stability of the equipment and improve the reliability and safety of the demolding process. The adjustable design of the locking structure allows the position of the demolding baffle to be easily adjusted and fixed. When it is necessary to change the mold or adjust the demolding position, simply loosen the locking component, move the demolding baffle to the desired position, and then re-fix the locking component to the positioning hole.

[0017] In some embodiments, the demolding rod connects the fixed mold and the moving mold, the moving mold is slidably connected to the demolding rod, and the length direction of the demolding rod is parallel to the sliding direction of the guide rail.

[0018] By adopting the above technical solutions, a stable demolding process and precise demolding position help reduce product damage and deformation, reduce shaking and misalignment during demolding, and improve the accuracy and reliability of demolding.

[0019] In some embodiments, the fixed mold is also slidably connected to a locking rod, and a locking motor fixed to the fixed mold drives the locking rod to slide along the sliding direction of the moving mold.

[0020] By adopting the above technical solutions, the efficiency and stability of mold clamping have been improved, the operation process has been simplified, and the safety of the equipment has been enhanced.

[0021] In some implementations, the mold-locking motor is connected to the mold-locking rod via a worm gear mechanism.

[0022] By adopting the above technical solutions, the deceleration and torque amplification effects of the worm gear mechanism enable the clamping motor to achieve a larger clamping force with less power, thereby improving clamping efficiency. The stable transmission ratio of the worm gear mechanism ensures the stability and accuracy of the clamping rod during sliding, reducing mold damage and product deformation. The self-locking function of the worm gear mechanism enhances the safety of the foam molding machine, preventing accidental movement of the clamping rod under reverse torque, thus avoiding injury or loss.

[0023] In some embodiments, the locking rod is provided with a groove, and the moving mold is provided with a locking mechanism. When the locking rod is connected to the moving mold, the locking mechanism can connect and fix the moving mold and the locking rod through the groove.

[0024] By adopting the above technical solution, when the mold-locking rod moves towards the moving mold, the locking mechanism will automatically enter the groove under the action of a certain triggering mechanism (such as spring, pneumatic, hydraulic, electric, etc.). Once the locking mechanism is fully in the groove, it will achieve a stable connection with the mold-locking rod through some means (such as the hook of the locking hook, the fastening of the locking buckle, etc.). Equipment using this design solution has a simpler and faster mold-locking process, which helps to improve production efficiency.

[0025] In summary, this application has at least one of the following beneficial technical effects:

[0026] 1. Compared with traditional driving methods, this application effectively solves the problems of stability and control precision of foam plastic machines, improves the production efficiency of the equipment, reduces maintenance costs, and enhances the adaptability and environmental performance of the equipment.

[0027] 2. Improved connection stability and device security, simplified operation process and enhanced adaptability.

[0028] 3. It improves mold-locking efficiency and stability, has high adaptability, and can be widely used in molds of different sizes and shapes. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the foam molding machine of this application;

[0030] Figure 2 yes Figure 1 Enlarged diagram of area A in the middle;

[0031] Figure 3 This is a bottom-view structural diagram of the foam molding machine of this application;

[0032] Figure 4 This is a rear view structural schematic diagram of the foam molding machine of this application;

[0033] Figure 5 yes Figure 4 Enlarged diagram of area B in the middle.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Frame; 11. Guide rail; 2. Control mechanism; 3. Moving mold; 31. Electric drive component; 32. Rack; 33. Gear; 4. Fixed mold; 5. Mold locking motor; 51. Worm gear mechanism; 52. Mold locking rod; 521. Groove; 6. Demolding baffle; 61. Demolding rod; 611. Positioning hole; 62. Connecting rod; 621. Locking hole; 63. Locking component; 7. Locking mechanism; 71. Locking cylinder; 72. Locking component; 721. Slot; 722. Round hole. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0041] Please see Figures 1-5The foam molding machine provided in this embodiment includes a control mechanism 2, a frame 1, a moving mold 3, a fixed mold 4, and a guide rail 11. The guide rail 11 is fixedly connected to the frame 1, the fixed mold 4 is fixedly connected to the frame 1, and the moving mold 3 is slidably connected to the guide rail 11. A rear mold and a front mold are respectively fixed inside the moving mold 3 and the fixed mold 4. The rear mold and the front mold are engaged to form an injection cavity. An electric drive component 31 is connected to the moving mold 3. The electric drive component 31 drives the moving mold 3 to slide along the guide rail 11 through a transmission mechanism. Under the drive of the electric drive component 31, the moving mold 3 has an open mold state and a closed mold state. In the closed mold state, the moving mold 3 and the fixed mold 4 are locked together, and the front mold and the rear mold form a closed cavity for foam molding. In the open mold state, the moving mold 3 and the fixed mold 4 are separated, and the foam mold is ejected. This embodiment of the foam molding machine improves control accuracy and reduces the failure rate.

[0042] Please see Figure 1 The fixed mold 4 is connected to a demolding baffle 6, which is slidably connected to the frame 1. The function of the demolding baffle 6 is to activate the demolding mechanism after the product is molded, ensuring the ease and integrity of removing the foamed part. The demolding baffle 6 can be made of stainless steel or aluminum alloy, which is both lightweight and corrosion-resistant.

[0043] Specifically, the fixed mold 4 is connected to a demolding rod 61, and a demolding baffle 6 is slidably connected to the demolding rod 61. A locking structure limits the relative distance between the demolding baffle 6 and the fixed mold 4. The demolding rod 61 connects the fixed mold 4 and the moving mold 3. The demolding rod 61 is fixedly connected to the fixed mold 4, and the moving mold 3 is slidably connected to the demolding rod 61. The length direction of the demolding rod 61 is parallel to the sliding direction of the guide rail 11. This design ensures the stability of the sliding of the moving mold 3 and avoids product quality problems caused by positional deviations. The demolding rod 61 can be made of high-strength alloy steel with a chrome-plated surface to increase wear resistance and corrosion resistance.

[0044] The fixed mold 4 is also slidably connected to a locking rod 52. A locking motor 5, fixed to the fixed mold 4, drives the locking rod 52 to slide along the sliding direction of the moving mold 3. The function of the locking rod 52 is to maintain tight contact between the moving mold 3 and the fixed mold 4 in the closed state, preventing material leakage. The locking motor 5 can also be an AC servo motor or a stepper motor to ensure the accuracy and reliability of the locking action. The locking motor 5 is fixed to the fixed mold 4. The locking rod 52 can be made of carbon steel or cast iron, with a polished surface to reduce frictional resistance.

[0045] The mold-locking motor 5 is connected to the mold-locking rod 52 via a worm gear mechanism 51. The worm gear mechanism 51 is characterized by strong self-locking, maintaining a locked state even in the event of a power outage, ensuring high safety. Furthermore, the worm gear mechanism 51 can achieve a large speed reduction ratio, making it suitable for high-load applications. The worm gear can be made of copper, while the worm can be made of hardened steel; the two materials work well together, resulting in stable operation.

[0046] Please see Figure 2 The locking structure includes a locking element 63, multiple positioning holes 611 along the length of the demolding rod 61, and locking holes 621 on the demolding baffle 6 that correspond one-to-one with the positioning holes 611. The locking element 63 passes through the positioning holes 611 and the locking holes 621 to restrict the sliding of the demolding baffle 6. The advantage of this design is that the position of the demolding baffle 6 can be adjusted according to the size of different products, flexibly meeting various production needs. The locking element 63 can be a bolt or a pin, and the number and spacing of the positioning holes 611 can be set according to actual needs.

[0047] Please see Figure 3 The transmission mechanism consists of a meshing gear 33 and a rack 32. The gear 33 is fixedly connected to the output shaft of the electric drive unit 31, which is fixedly connected to the moving mold 3. The rack 32 is fixedly connected to the frame 1. This gear 33 and rack 32 transmission method is simple and reliable, enabling precise position control. For example, the gear 33 can be a helical gear 33 or a spur gear 33, and the rack 32 can be made of high-strength steel to enhance durability. Furthermore, grease can be added between the gear 33 and the rack 32 to reduce friction and extend service life.

[0048] The electric drive component 31 is a motor, which is connected to a speed-changing mechanism. Gear 33 is fixedly connected to the output shaft of the speed-changing mechanism. The motor can be an AC servo motor or a stepper motor; both types offer high control precision and response speed, making them suitable for precision control applications. The speed-changing mechanism can be a planetary reducer or a worm gear reducer; both types effectively reduce speed and increase torque, ensuring smooth movement of the moving mold 3.

[0049] Please see 4 and Figure 5 The locking rod 52 is provided with a groove 521, and the moving mold 3 is provided with a locking mechanism 7. When the locking rod 52 is connected to the moving mold 3, the locking mechanism 7 can connect and fix the moving mold 3 and the locking rod 52 through the groove 521. The locking mechanism 7 can be a snap-fit ​​type or a pin type, which is easy to operate, quick and reliable. The groove 521 can be designed to be rectangular or polygonal in order to better transmit torque and ensure locking strength.

[0050] Specifically, the locking mechanism 7 includes a locking cylinder 71 and a locking member 72. The locking member 72 is slidably connected to the moving mold 3. The piston rod of the locking cylinder 71 is connected to the locking member 72. The locking member 72 has a communicating slot 721 and a round hole 722. In the mold-closed state, the mold-locking rod 52 passes through the round hole 722, and the groove 521 corresponds to the slot 721. The locking cylinder 71 drives the locking member 72 to move, so that the slot 721 engages with the mold-locking rod 52 at the groove 521. The mold-locking rod 52 can pull the moving mold 3 to move through the locking member 72.

[0051] The implementation principle of this embodiment is as follows:

[0052] Under the control of the control mechanism 2, during mold closing, the electric drive component 31 drives the moving mold 3 to slide along the guide rail 11 towards the fixed mold 4. When entering the mold closing state, the moving mold 3 and the fixed mold 4 are in contact, and the locking mechanism 7 locks with the locking rod 52. The locking motor 5 drives the locking rod 52 through the worm gear mechanism 51 to pull the moving mold 3 to increase the locking force between the moving mold 3 and the fixed mold 4. After injection molding, the locking mechanism 7 separates from the locking rod 52, and the electric drive component 31 drives the moving mold 3 to slide along the guide rail 11 away from the fixed mold 4. The demolding mechanism inside the mold in the fixed mold 4 touches the demolding baffle 6 and pushes the foamed part out of the fixed mold 4. The entire foam molding machine adopts electric drive to replace the traditional hydraulic system, solving the problems of leakage and low control accuracy of the hydraulic system. The combination of motor and speed change mechanism realizes precise speed and position control, and the gear 33 and rack 32 transmission method further improves transmission efficiency and stability. The design of the demolding baffle 6 and demolding rod 61 makes product handling safer and more convenient, and the flexibility of the locking structure adapts to the production needs of different products. The setting of the mold clamping rod 52 and the locking mechanism 7 ensures the tightness and firmness of the mold closing process, improving the overall reliability and production efficiency of the equipment.

[0053] The working process of the foam molding machine in this application:

[0054] S1, the raw materials to be processed are placed into the hopper and fed into the preheating chamber by the feeding mechanism for preheating.

[0055] S2, After preheating, push the raw material to the injection port of the injection molding machine to prepare for injection molding.

[0056] S3, start the electric drive unit 31, and drive the moving mold 3 to move along the guide rail 11 towards the fixed mold 4 through the transmission mechanism, and enter the mold closing state.

[0057] S4. After the moving mold 3 comes into contact with the fixed mold 4, the mold locking motor 5 drives the mold locking rod 52 to firmly lock the moving mold 3 and the fixed mold 4 together to form a closed mold cavity.

[0058] S5, the injection unit injects molten plastic into the mold cavity, while the spraying device evenly sprays foaming agent onto the injection area.

[0059] S6, cooling and molding. After injection molding is completed, the clamping motor 5 rotates in the reverse direction to unlock the moving mold 3 and the fixed mold 4.

[0060] S7, the electric drive component 31 reverses, and through the transmission mechanism, it drives the moving mold 3 away from the fixed mold 4, entering the mold opening state.

[0061] S8, the demolding mechanism of the front mold, under the push of the demolding baffle 6, pushes the foam part and ejects the finished foam part out of the mold.

[0062] S9. After the finished product is removed, clean the residue inside the mold to prepare for the next cycle.

[0063] The above embodiments illustrate the differences between this application and existing equipment. The injection molding, cooling, and other structures are the same as those in existing equipment and will not be described again.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments; the embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes, modifications, substitutions, and variations can be made to this utility model without departing from its spirit and scope, and all such changes, modifications, substitutions, and variations fall within the scope of the claimed utility model.

Claims

1. A foam molding machine, characterized in that, The device includes a frame (1), a moving mold (3), a fixed mold (4), and a guide rail (11). The guide rail (11) is fixedly connected to the frame (1), the fixed mold (4) is fixedly connected to the frame (1), the moving mold (3) is slidably connected to the guide rail (11), and the moving mold (3) is connected to an electric drive unit (31). The electric drive unit (31) drives the moving mold (3) to slide along the guide rail (11) through a transmission mechanism. The moving mold (3) has an open mold state and a closed mold state under the drive of the electric drive unit (31). In the closed mold state, the moving mold (3) and the fixed mold (4) are locked together. In the open mold state, the moving mold (3) and the fixed mold (4) are separated.

2. The foam molding machine according to claim 1, characterized in that, The electric drive component (31) is a motor, and the motor is connected to a speed change mechanism.

3. The foam molding machine according to claim 1, characterized in that, The transmission mechanism consists of a meshing gear (33) and a rack (32). The gear (33) is fixedly connected to the output shaft of the electric drive unit (31). The electric drive unit (31) is fixedly connected to the frame (1) / moving mold (3). The rack (32) is fixedly connected to the moving mold (3) / frame (1).

4. The foam molding machine according to claim 1, characterized in that, The fixed mold (4) is connected to a demolding baffle (6), which is slidably connected to the frame (1).

5. The foam molding machine according to claim 4, characterized in that, The fixed mold (4) is connected to a demolding rod (61), and the demolding baffle (6) is slidably connected to the demolding rod (61). The relative distance between the demolding baffle (6) and the fixed mold (4) is limited by a locking structure.

6. The foam molding machine according to claim 5, characterized in that, The locking structure includes a locking member (63), a plurality of positioning holes (611) provided along the length direction on the demolding rod (61), and a locking hole (621) provided on the demolding baffle (6) that corresponds one-to-one with the positioning holes (611). The locking member (63) passes through the positioning holes (611) and the locking holes (621) to restrict the sliding of the demolding baffle (6).

7. The foam molding machine according to claim 5, characterized in that, The demolding rod (61) connects the fixed mold (4) and the moving mold (3). The moving mold (3) is slidably connected to the demolding rod (61). The length direction of the demolding rod (61) is parallel to the sliding direction of the guide rail (11).

8. The foam molding machine according to claim 1, characterized in that, The fixed mold (4) is also slidably connected to the locking rod (52), and the locking motor (5) fixed to the fixed mold (4) drives the locking rod (52) to slide along the sliding direction of the moving mold (3).

9. The foam molding machine according to claim 8, characterized in that, The mold-locking motor (5) is connected to the mold-locking rod (52) through a worm gear mechanism (51).

10. The foam molding machine according to claim 8, characterized in that, The locking rod (52) is provided with a groove (521), and the moving mold (3) is provided with a locking mechanism (7). When the locking rod (52) is connected to the moving mold (3), the locking mechanism (7) can connect and fix the moving mold (3) and the locking rod (52) through the groove (521).

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