Double-lifting platform for forming of plastic vacuum forming machine

Abstract

The utility model relates to the field of plastic processing, and discloses a double-lifting platform for forming of a plastic vacuum forming machine, which comprises a main body frame, supporting legs are arranged at four corners of the bottom of the main body frame, a top plate is fixedly connected to the top of the main body frame, and two groups of driving devices are arranged between the main body frame and the top plate. And the driving device comprises two driving mechanisms which are symmetrically installed up and down, each driving mechanism comprises a second fixing frame and an electromagnetic valve, the top of each second fixing frame is fixedly connected with a static platform, the center of the bottom of each static platform is fixedly connected with an air cylinder, and a driven frame is arranged on the outer side of the bottom of each air cylinder. The double-lifting-platform synchronous closing design is adopted, the double-lower-die control air cylinder structure is combined, the main platform drives the lower dies to stably ascend and descend, the auxiliary platform assists in pressurization, and the problems that a single platform is insufficient in pressure and not synchronous in the vertical direction are solved. By means of the design, the mold clamping force, the forming precision and the production efficiency of equipment are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plastic processing especially relates to a double lifting platform for blister machine forming. BACKGROUND

[0002] In the field of plastic processing, the blister forming process is an important technology that involves heating and softening plastic sheets and then vacuum-adsorbing them onto the surface of a mold for cooling and forming. It is widely used in the production of packaging, industrial parts, and consumer goods. As an important link in the plastic processing industry, the performance of blister forming equipment directly determines the quality and production efficiency of products. In particular, for ultra-long or complex plastic products, the equipment needs to have strong forming pressure, accurate temperature control systems, and high-efficiency vacuum adsorption capabilities to meet the growing market demand for high-precision and high-quality plastic products.

[0003] However, existing blister machine forming technology has some limitations in the production of ultra-long plastic products, mainly in the distribution of mold closing force and platform synchronization. Due to the limited pressure of a single platform, especially when producing ultra-long products (such as 2670mm), it is difficult to evenly cover the entire mold area, resulting in poor adsorption at the end and detail areas, affecting the forming quality. In addition, during the movement of the upper and lower platforms, due to the lack of precision in synchronous control, slight imbalance or misalignment may occur, reducing the stability of the forming process. These technical deficiencies do not limit the production capacity of conventional products, but there is still room for improvement and optimization when facing the demand for high-precision, high-quality ultra-long products.

[0004] To solve the above problems, a double lifting platform for blister machine forming is proposed. Utility model content

[0005] To make up for the above shortcomings, the utility model provides a double lifting platform for blister machine forming, aiming to solve the problem of insufficient mold closing force and poor synchronization of existing blister machines when facing the forming of ultra-long plastic products.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a double lifting platform for blister machine forming, comprising a main frame, the bottom corners of the main frame are provided with supporting legs, the top of the main frame is fixedly connected with a top plate, two groups of driving devices are arranged between the main frame and the top plate, the driving device comprises two driving mechanisms symmetrically installed above and below;

[0007] The driving mechanism includes a fixed frame two and a solenoid valve. A stationary platform is fixedly connected to the top of the fixed frame two. A cylinder is fixedly connected to the bottom center of the stationary platform. A driven frame is provided on the bottom outer side of the cylinder. Guide posts are fixedly connected to the top four corners of the driven frame. The tops of the four guide posts penetrate the interior of the stationary platform and are connected to the bottom four corners of the driven platform. The output end of the cylinder penetrates the interior of the stationary platform and is fixedly connected to the bottom center of the driven platform. Protective cylinders are bolted to the top four corners of the stationary platform. Limiting components are provided on both sides of the top of the driven frame.

[0008] As a further description of the above technical solution:

[0009] The solenoid valve controls the airflow direction of the air source through an electrical signal, thereby driving the piston rod inside the cylinder to extend or retract.

[0010] As a further description of the above technical solution:

[0011] The guide post is slidably connected inside the protective cylinder.

[0012] As a further description of the above technical solution:

[0013] The limiting component includes a gear disk, and two gear disks are symmetrically arranged on the top of the driven frame, and the two gear disks are meshed by a chain. A limiting post is provided on the top of the gear disk.

[0014] As a further description of the above technical solution:

[0015] The top of the limiting post abuts against the bottom of the stationary platform as the driven frame moves upward.

[0016] As a further description of the above technical solution:

[0017] Both of the drive mechanisms below include a moving platform. The top of one of the moving platforms is connected to the lower mold via a connecting block, and the top of the other moving platform abuts against the bottom of the lower mold as the cylinder pushes it.

[0018] As a further description of the above technical solution:

[0019] Both of the above driving mechanisms include cylinders and moving platforms. The tops of the two cylinders are connected to the bottom of the top plate by bolts. The bottoms of the two moving platforms are fixedly connected to upper molds, and the upper molds and lower molds move in opposite directions.

[0020] As a further description of the above technical solution:

[0021] Two fixed frames are symmetrically installed inside the main frame. Exhaust fans are installed on the outer sides of both fixed frames. A control box is installed on the front side of the main frame.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the blow molding machine adopts a dual-lifting platform synchronous closing design, which is a structural optimization design for molding ultra-long plastic products. By adding an independent lifting platform, the two platforms close simultaneously from top to bottom, achieving stronger mold-closing force and uniform pressure distribution. Compared with a single platform, the advantage of the dual-lifting platform is that it can share the pressure load, avoiding incomplete product molding due to insufficient pressure from a single platform. Especially in the production of ultra-long plastic products, the problem of insufficient mold-closing pressure causing some details to not achieve the expected effect is effectively solved. This design not only enhances the mold-closing capacity of the equipment but also improves the production efficiency, meeting the high-precision and high-quality molding requirements of ultra-long plastic products.

[0024] 2. In this utility model, the design introduces dual lower mold control cylinders into the dual lifting platform structure. One cylinder is always fixed to the lower mold, ensuring a stable connection between the main platform and the lower mold for smooth lifting; the other cylinder only provides auxiliary pressure during mold closing. Through this differentiated control method, the main platform is responsible for driving the lower mold upward, while the secondary platform is slightly slower, only providing pressure. This design effectively solves the problem of asynchronous movement between the upper and lower platforms, ensuring that the two sets of platforms move in perfect unison at critical moments in blow molding, thereby providing stable and uniform pressure, improving molding accuracy and production efficiency, and is particularly suitable for the high-quality molding requirements of ultra-long plastic products. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a double lifting platform for forming in a vacuum forming machine according to the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a cylinder for a double lifting platform in a vacuum forming machine, as proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the upper mold of a double lifting platform for forming a vacuum forming machine, as proposed in this utility model.

[0028] Legend:

[0029] 1. Main frame; 2. Support legs; 3. Top plate; 4. Fixed frame one; 5. Exhaust fan; 6. Control box; 7. Upper mold; 8. Lower mold; 9. Drive mechanism; 91. Fixed frame two; 92. Static platform; 93. Moving platform; 94. Cylinder; 95. Driven frame; 96. Guide post; 97. Protective cylinder; 98. Solenoid valve; 99. Limiting assembly; 991. Limiting post; 992. Gear disk; 993. Chain; 10. Connecting block. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a double lifting platform for a vacuum forming machine, comprising a main frame 1, with support legs 2 at each of the four corners of the bottom of the main frame 1 to ensure the stability and load-bearing capacity of the equipment. A top plate 3 is fixedly connected to the top of the main frame 1 to support and fix the upper drive device and related components. Two fixed frames 4 are symmetrically installed inside the main frame 1 to enhance the rigidity and stability of the overall structure. Exhaust fans 5 are installed on the outer sides of both fixed frames 4 to dissipate heat and maintain a stable internal working temperature, which helps to improve the reliability and efficiency of equipment operation. A control box 6 is installed on the front of the main frame 1. The control box 6 integrates an electrical control system to manage the machine's drive, temperature control, and air pressure functions, ensuring intelligent and precise operation of the equipment.

[0032] Two sets of drive devices are installed between the main frame 1 and the top plate 3 to realize the lifting and closing operations of the mold. Each set of drive devices includes two drive mechanisms 9 symmetrically installed vertically, thereby realizing independent control and coordinated movement of the upper mold 7 and the lower mold 8. Each drive mechanism 9 includes a fixed frame 91 and a solenoid valve 98. A stationary platform 92 is fixedly connected to the top of the fixed frame 91. The stationary platform 92 is the core support component of the drive mechanism 9, and a cylinder 94 is fixedly connected to the center of its bottom. A driven frame 95 is installed on the outer side of the bottom of the cylinder 94. Guide pillars 96 are fixedly connected to the four corners of the top of the driven frame 95. The top of the guide pillars 96 penetrates the interior of the stationary platform 92 and connects to the four corners of the bottom of the moving platform 93, ensuring the smoothness and accuracy of the movement of the moving platform 93 during lifting. The output end of the cylinder 94 penetrates the interior of the stationary platform 92 and is fixedly connected to the center of the bottom of the moving platform 93, for directly driving the lifting action of the moving platform 93. The solenoid valve 98 receives control signals and precisely controls the airflow direction of the air source, thereby driving the piston rod inside the cylinder 94 to extend or retract, thus causing the moving platform 93 to rise and fall. Protective sleeves 97 are bolted to the four corners of the top of the stationary platform 92. These sleeves protect the guide posts 96 and prevent them from being contaminated or damaged during sliding. The guide posts 96 are slidably connected inside the protective sleeves 97, thereby improving the accuracy of guidance and the durability of the equipment.

[0033] Limiting components 99 are provided on both sides of the top of the driven frame 95 to ensure the lifting range and motion accuracy of the drive mechanism 9. The limiting components 99 include two gear disks 992, symmetrically mounted on the top of the driven frame 95 and connected by a chain 993 to form a stable transmission structure. Limiting posts 991 are provided on the top of the gear disks 992. As the driven frame 95 moves upward, the limiting posts 991 gradually abut against the bottom of the stationary platform 92, thereby limiting the maximum displacement of the lifting platform and ensuring the safe and stable operation of the equipment.

[0034] Both lower drive mechanisms 9 include a moving platform 93. The top of one moving platform 93 is connected to the lower mold 8 via a connecting block 10, serving to support and fix the lower mold 8. The top of the other moving platform 93 abuts against the bottom of the lower mold 8 under the push of a cylinder 94, forming a mold-closing structure with the two cylinders 94 working in synergy, providing sufficient pressure support for the lower mold 8. Both upper drive mechanisms 9 include a cylinder 94 and a moving platform 93. The tops of the two cylinders 94 are bolted to the bottom of the top plate 3 to ensure its stability. The bottoms of the two moving platforms 93 are fixedly connected to an upper mold 7. Under the action of the drive mechanism 9, the upper mold 7 moves in opposite directions to the lower mold 8, thereby achieving precise mold closing and demolding operations.

[0035] Working Principle: This vacuum forming machine uses a dual lifting platform with symmetrical upper and lower drive mechanisms 9 to achieve precise lifting and closing of the mold. When the equipment starts, the control box 6 drives the solenoid valve 98 via an electrical signal, controlling the extension and retraction of the piston rod inside the cylinder 94. This causes the moving platform 93 to slide up and down along the guide post 96, thus realizing the opening and closing of the mold. Of the two lower drive mechanisms 9, one moving platform 93 is fixedly connected to the lower mold 8 via a connecting block 10, while the other moving platform 93 provides auxiliary pressure to the lower mold 8 under the push of the cylinder 94, forming a mold-closing structure with the two cylinders 94 working together, effectively improving the mold-closing force. The two upper drive mechanisms 9 are fixedly connected to the upper mold 7 via the moving platform 93. The upper mold 7 and lower mold 8 move in opposite directions under the action of the cylinder 94, ensuring the accuracy of mold closure. The limiting assembly 99 ensures that the movement range of the lifting platform is controlled via a chain 993 and a limiting post 991, while the stationary platform 92 and the protective cylinder 97 provide guidance and protection for the movement. The entire system works collaboratively and is suitable for high-quality vacuum forming of extra-long plastic products.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double lifting platform for forming in a vacuum forming machine, comprising a main frame (1), characterized in that: The main frame (1) is provided with four support legs (2) at the bottom corners, and a top plate (3) is fixedly connected to the top of the main frame (1). Two sets of driving devices are provided between the main frame (1) and the top plate (3). The driving devices include two driving mechanisms (9) installed symmetrically at the top and bottom. The drive mechanism (9) includes a fixed frame (91) and a solenoid valve (98). A stationary platform (92) is fixedly connected to the top of the fixed frame (91). A cylinder (94) is fixedly connected to the bottom center of the stationary platform (92). A driven frame (95) is provided on the bottom outer side of the cylinder (94). Guide posts (96) are fixedly connected to the top four corners of the driven frame (95). The tops of the four guide posts (96) penetrate the interior of the stationary platform (92) and are connected to the bottom four corners of the moving platform (93). The output end of the cylinder (94) penetrates the interior of the stationary platform (92) and is fixedly connected to the bottom center of the moving platform (93). Protective cylinders (97) are bolted to the top four corners of the stationary platform (92). Limiting components (99) are provided on both sides of the top of the driven frame (95).

2. The double lifting platform for forming in a vacuum forming machine according to claim 1, characterized in that: The solenoid valve (98) controls the airflow direction of the air source through an electrical signal to drive the piston rod inside the cylinder (94) to extend or retract.

3. The double lifting platform for forming in a vacuum forming machine according to claim 1, characterized in that: The guide post (96) is slidably connected inside the protective cylinder (97).

4. The double lifting platform for forming in a vacuum forming machine according to claim 1, characterized in that: The limiting component (99) includes a gear disk (992), and two gear disks (992) are symmetrically arranged on the top of the driven frame (95), and the two gear disks (992) are meshed with each other by a chain (993). A limiting post (991) is provided on the top of the gear disk (992).

5. The double lifting platform for forming in a vacuum forming machine according to claim 4, characterized in that: The top of the limiting post (991) abuts against the bottom of the stationary platform (92) as the driven frame (95) moves upward.

6. The double lifting platform for forming in a vacuum forming machine according to claim 1, characterized in that: Both of the lower drive mechanisms (9) include a moving platform (93). The top of one of the moving platforms (93) is connected to the lower mold (8) via a connecting block (10), and the top of the other moving platform (93) abuts against the bottom of the lower mold (8) as the cylinder (94) pushes it.

7. The double lifting platform for forming in a vacuum forming machine according to claim 6, characterized in that: The two drive mechanisms (9) above each include a cylinder (94) and a moving platform (93). The top of the two cylinders (94) is connected to the bottom of the top plate (3) by bolts. The bottom of the two moving platforms (93) is fixedly connected to an upper mold (7). The upper mold (7) and the lower mold (8) move in opposite directions.

8. The double lifting platform for forming in a vacuum forming machine according to claim 1, characterized in that: The main frame (1) has two fixed frames (4) symmetrically installed inside. Each of the two fixed frames (4) has an exhaust fan (5) installed on its outer side. Each of the main frames (1) has a control box (6) installed on its front side.

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