Blown film setting structure of a composite film blown film equipment

Abstract

The utility model relates to thin film processing equipment technical field discloses a blow film setting structure of composite film blow film equipment, including support platform, the inside fixedly connected with blow film machine main part of support platform, the upper surface fixedly connected with support frame of support platform, the outer wall fixedly connected with fixed ring of support frame, the inside fixedly connected with connecting cylinder of fixed ring, the inside slide connection has the clamping block of connecting cylinder, the inside spring of fixed ring is provided with, the outer wall rotationally connected with support ring of fixed ring, the inside of support ring is equipped with the clamping block of slot, the outer wall slide connection of clamping block is in the inner wall of slot. In the utility model, through the cooperation of support ring, clamping block and spring, flexible adjustment of bamboo pole position is realized. When rotating the bamboo pole, the support ring drives the clamping block to extrude the spring, makes it contract and clamps into the corresponding clamping slot, locks the position through the spring resilience, ensures the stable fixation of the bamboo pole, reaches the purpose that the bamboo pole position is adjusted as needed.

Description

Technical Field

[0001] This utility model relates to the field of thin film processing equipment technology, and in particular to a blown film shaping structure for a composite film blown film equipment. Background Technology

[0002] In the field of plastic film processing, blown film is widely used due to its high production efficiency and excellent film performance. However, in the production of composite films, due to factors such as differences in melt viscosity and uneven cooling rate during the co-extrusion of multiple materials, the film bubble is prone to shaking, skewness, or thickness fluctuation, which affects the uniformity and mechanical properties of the film.

[0003] A search revealed a novel blown film production equipment for geomembranes, disclosed in Chinese Patent Publication No. CN221793753U. The equipment includes a frame, a positioning frame fixedly mounted at the top, a ladder fixedly mounted at the front, an adjustable roller on the left side, and a shaping ring fixedly mounted in the center of the frame. The equipment further includes: a blower device placed at the lower center of the frame to drive the formation of the plastic film; a feeding device placed at the right end of the frame to heat and melt the plastic particles; a blower device placed at the rear end of the frame to rapidly cool the formed plastic film; and a roll-up device placed at the left end of the frame to package the formed composite film. This novel structure is simple to operate, using a telescopic rod to replace manual feeding, reducing workload. The roller device and upper traction shaft design ensure good plasticization, uniform thickness, and high quality of the blown film.

[0004] The aforementioned proposed solutions employ a fixed shaping ring, which cannot flexibly adjust the position and contact pressure of the limiting structure according to different bubble sizes. This results in poor adaptability to wide-width or high-shrinkage films, making them prone to bubble swaying or localized stress concentration. Furthermore, the dynamic balance control of the bubble is limited, particularly in high-speed blown film or wide-width film production. Utility Model Content To overcome the above shortcomings, this utility model provides a blown film shaping structure for a composite membrane blown film equipment, which aims to improve the problem that previous equipment could not flexibly adjust the position and contact pressure of the limiting structure according to different membrane bubble sizes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A blown film shaping structure for a composite film blown film device includes a support platform. A blown film machine body is fixedly connected inside the support platform. A support frame is fixedly connected to the upper surface of the support platform. A fixing ring is fixedly connected to the outer wall of the support frame. A connecting cylinder is fixedly connected inside the fixing ring. A locking block is slidably connected inside the connecting cylinder. A spring is provided inside the fixing ring. A support ring is rotatably connected to the outer wall of the fixing ring. A locking groove is opened inside the support ring. The outer wall of the locking block is slidably connected to the inner wall of the locking groove. A support component is provided on the outer wall of the support ring.

[0006] The above technical solution achieves flexible adjustment of the bamboo pole's position through the synergistic action of the support ring, locking block, and spring. When the bamboo pole is rotated, the support ring drives the locking block to compress the spring, causing it to contract and engage with the corresponding slot. The spring's rebound force locks the position, ensuring the bamboo pole's stability and allowing for flexible, on-demand adjustment of its position. This enables precise adaptation to different bubble sizes, allowing for flexible adjustment of the bamboo pole's position and contact pressure according to varying bubble sizes. Slight contact between the bamboo pole and the bubble surface effectively limits bubble sway, reducing the risk of uneven thickness or breakage during film production, and significantly improving the stability of the blown film process and the quality of the finished product.

[0007] As a further description of the above technical solution: The support assembly includes a connecting block, the outer wall of which is fixedly connected to the outer wall of the support ring, a support shaft is fixedly connected inside the connecting block, a bamboo pole is slidably connected to the outer wall of the support shaft, and the outer wall of the bamboo pole is slidably connected to the inner wall of the connecting block.

[0008] The above technical solution allows polished bamboo poles to be fitted onto a support shaft and inserted into a connecting block. The support shaft serves to support and limit the movement of the bamboo pole. A rubber buffer pad is provided at the connection between the bamboo pole and the connecting block. The rubber buffer pad has a certain degree of elasticity, which can increase the friction between the bamboo pole and the connecting block and prevent the bamboo pole from sliding or rotating unnecessarily in the connecting block.

[0009] As a further description of the above technical solution: One end of the spring is fixed to the locking block, and the other end abuts against the inner wall of the connecting cylinder.

[0010] The above technical solution involves a spring that assists in connecting the locking block and the connecting cylinder, while the connecting cylinder acts as a limit stop for the locking block, ensuring the stability of the locking block's movement.

[0011] As a further description of the above technical solution: The outer wall of the card block is slidably connected to the inside of the support ring, and the inner wall of the support ring is rotatably connected to the outer wall of the support frame.

[0012] Through the above technical solution, the fixed ring plays the role of supporting and limiting the support ring, thereby ensuring the stability of the support ring during rotation.

[0013] As a further description of the above technical solution: A support frame is fixedly connected to the outer wall of the support frame, and a first motor is fixedly connected to the outer wall of the support frame. A half gear is fixedly provided at the output end of the first motor, and the outer wall of the half gear is rotatably connected to the inner wall of the support frame.

[0014] The above technical solution involves a first motor driving a half-gear to rotate, which in turn drives a rack to slide within the support frame.

[0015] As a further description of the above technical solution: The tooth ends of the half gear are meshed with a rack, and a connecting frame is fixedly connected to the outer wall of the rack.

[0016] The above technical solution uses a half gear to drive the rack to slide within the support frame, and the rack to support and limit the connecting frame.

[0017] As a further description of the above technical solution: The outer walls of the rack and the connecting frame are slidably connected to the inside of the support frame, and a U-shaped frame is fixedly connected to the outer wall of the connecting frame.

[0018] The above technical solution provides a stable support structure for the rack and connecting frame, enabling them to slide linearly within a specific space.

[0019] As a further description of the above technical solution: A second motor is fixedly connected inside the U-shaped frame, and a fan blade is fixedly installed at the output end of the second motor.

[0020] The above technical solution uses a second motor to drive the fan blades to rotate, thereby stabilizing the membrane bubble through the generated low-speed airflow.

[0021] This utility model has the following beneficial effects: 1. In this utility model, the flexible adjustment of the bamboo pole position is achieved through the coordinated action of the support ring, the locking block, and the spring. When the bamboo pole is rotated, the support ring drives the locking block to compress the spring, causing it to contract and lock into the corresponding slot. The spring's rebound force locks the position, ensuring the bamboo pole is stably fixed. This allows for flexible adjustment of the bamboo pole position as needed, precisely adapting to the requirements of different sized bubble membranes. Consequently, the position and contact pressure of the bamboo pole can be flexibly adjusted according to different bubble membrane sizes.

[0022] 2. In this invention, the first motor drives a rack and pinion to reciprocate within a U-shaped frame via a half-gear. This, combined with the fan blades driven by the second motor, generates a low-speed airflow to help stabilize the membrane bubble. After the bamboo pole provides initial positioning, the airflow further suppresses membrane bubble swaying, making it particularly suitable for high-speed traction conditions. This design combines mechanical positioning with dynamic airflow balance, a dual effect that significantly reduces vibration defects in film production while avoiding surface scratches caused by direct contact. Attached Figure Description

[0023] Figure 1 This is a perspective view of the blown film shaping structure of a composite film blown film device proposed in this utility model; Figure 2 This is a partial structural diagram of the support frame for the blown film shaping structure of a composite film blown film device proposed in this utility model; Figure 3 This is a partial structural diagram of a half-gear in the blown film shaping structure of a composite film blown film device proposed in this utility model. Figure 4 This is a partial structural diagram of the fixing ring of the blown film shaping structure of a composite film blown film device proposed in this utility model; Figure 5 This is a partial schematic diagram of the spring structure of the blown film shaping structure of a composite film blown film device proposed in this utility model.

[0024] Legend: 1. Support platform; 2. Main body of blown film machine; 3. Support frame; 4. Fixing ring; 5. Connecting cylinder; 6. Clamping block; 7. Spring; 8. Support ring; 9. Clamping groove; 10. Connecting block; 11. Support shaft; 12. Bamboo pole; 13. Support frame; 14. First motor; 15. Half gear; 16. Rack; 17. Connecting frame; 18. U-shaped frame; 19. Second motor; 20. Fan blade; 21. Support assembly. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4An embodiment of this utility model provides a blown film shaping structure for a composite film blown film equipment, including a support platform 1, a blown film machine body 2 fixedly connected inside the support platform 1, a support frame 3 fixedly connected to the upper surface of the support platform 1, a fixing ring 4 fixedly connected to the outer wall of the support frame 3, a connecting cylinder 5 fixedly connected inside the fixing ring 4, a locking block 6 slidably connected inside the connecting cylinder 5, a spring 7 provided inside the fixing ring 4, a support ring 8 rotatably connected to the outer wall of the fixing ring 4, a locking groove 9 opened inside the support ring 8, the outer wall of the locking block 6 slidably connected to the inner wall of the locking groove 9, and a support component 21 provided on the outer wall of the support ring 8; Specifically, the support platform 1 supports and fixes the support frame 3 and the blown film machine body 2. The blown film machine body 2 forms a continuous and uniform tubular film bubble by extruding molten plastic and shaping it through a die. The support frame 3 is made of stainless steel and supports the limiting and fixing ring 4. The fixing ring 4 supports and limits the support ring 8, thus ensuring the stability of the support ring 8 during rotation. By rotating the bamboo pole 12, the connecting block 10 connects and drives the support ring 8 to rotate on the fixing ring 4. At this time, the support ring 8 rotates while pressing the locking block 6, causing it to slide in the connecting cylinder 5. The connecting cylinder 5 supports the limiting locking block 6. This design ensures the stability of the sliding block 6. The inner part of the connecting cylinder 5 is designed with a stepped constriction, which forms a hard limit by using the constriction section. This prevents the block 6 from being ejected from the connecting cylinder 5 by the spring 7. While the block 6 slides, it also compresses the spring 7, causing it to contract. Under the rebound of the spring 7, the block 6 can be locked in the slot 9. The slot 9 limits the position of the block 6, thereby limiting the position of the support ring 8. This allows for the adjustment of the position of the bamboo pole 12 in the support frame 3 as needed. After the bamboo pole 12 makes slight contact with the surface of the film bubble, it can effectively limit the swaying of the film bubble, reduce the risk of uneven thickness or breakage in film production, and significantly improve the stability of the blown film process and the quality of the finished product.

[0027] Reference Figure 1 and Figure 3 The support component 21 includes a connecting block 10, the outer wall of the connecting block 10 is fixedly connected to the outer wall of the support ring 8, the inner wall of the connecting block 10 is fixedly connected to a support shaft 11, the outer wall of the support shaft 11 is slidably connected to a bamboo pole 12, and the outer wall of the bamboo pole 12 is slidably connected to the inner wall of the connecting block 10. Specifically, the polished bamboo pole 12 can be fitted onto the support shaft 11 and inserted into the connecting block 10. The support shaft 11 serves to support and limit the bamboo pole 12. A rubber buffer pad is provided at the connection between the bamboo pole 12 and the connecting block 10. When relative movement occurs between the bamboo pole 12 and the connecting block 10, or when it is subjected to impact or vibration, the rubber buffer pad can absorb and disperse this energy, playing a buffering role. This reduces the damage caused by impact and vibration to the bamboo pole 12, the connecting block 10, and the entire structure, and extends the service life of each component. The rubber buffer pad has a certain degree of elasticity, which can increase the friction between the bamboo pole 12 and the connecting block 10, preventing the bamboo pole 12 from sliding or rotating unnecessarily in the connecting block 10. This improves the stability and reliability of the bamboo pole 12 installation, ensuring that the bamboo pole 12 can maintain the expected position and posture under various working conditions, thereby ensuring the normal operation of the entire structure.

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 One end of the spring 7 is fixed to the locking block 6, and the other end abuts against the inner wall of the connecting cylinder 5; the outer wall of the locking block 6 is slidably connected to the inside of the support ring 8, and the inner wall of the support ring 8 is rotatably connected to the outer wall of the support frame 3; a support frame 13 is fixedly connected to the outer wall of the support frame 3, and a first motor 14 is fixedly connected to the outer wall of the support frame 13; a half gear 15 is fixedly provided at the output end of the first motor 14, and the outer wall of the half gear 15 is rotatably connected to the inner wall of the support frame 13; a rack 16 is meshed with the tooth end of the half gear 15, and a connecting frame 17 is fixedly connected to the outer wall of the rack 16; the outer walls of both the rack 16 and the connecting frame 17 are slidably connected to the inside of the support frame 13, and a U-shaped frame 18 is fixedly connected to the outer wall of the connecting frame 17; Specifically, the first motor 14 drives the half gear 15 to rotate, and the half gear 15 drives the rack 16 to slide in the support frame 13. The support frame 13 provides a stable support structure for the rack 16 and the connecting frame 17, allowing them to slide linearly within a specific space. The rack 16 then drives the connecting frame 17 to slide within the support frame 13, and the connecting frame 17 drives the U-shaped frame 18 to reciprocate. The connecting frame 17, as the connecting component between the rack 16 and the U-shaped frame 18, accurately transmits the linear reciprocating motion of the rack 16 to the U-shaped frame 18, thus realizing the retransmission of the motion.

[0029] Reference Figure 1 and Figure 5 The U-shaped frame 18 is internally fixedly connected to a second motor 19, and the output end of the second motor 19 is fixedly equipped with a fan blade 20; Specifically, the second motor 19 drives the fan blades 20 to rotate, thereby stabilizing the membrane bubble through the generated low-speed airflow. The low-speed airflow can act evenly on the surface of the membrane bubble, supporting, stretching and stabilizing the shape of the membrane bubble, preventing problems such as shaking, deformation or rupture, and improving the quality and production efficiency of the membrane bubble.

[0030] Working principle: When this structure is needed, first, the polished bamboo pole 12 is put on the support shaft 11 and inserted into the connecting block 10. Then, the bamboo pole 12 is rotated, and under the connection of the connecting block 10, the support ring 8 can be driven to rotate on the fixed ring 4. At this time, the support ring 8 will squeeze the locking block 6 while rotating, so that it slides in the connecting cylinder 5. While the locking block 6 is sliding, it will squeeze the spring 7 to retract. Under the rebound of the spring 7, the locking block 6 can be locked in the slot 9. Under the limiting effect of the slot 9 on the locking block 6, the position of the support ring 8 can be restricted. The position of the bamboo pole 12 in the support frame 3 can be adjusted as needed. After the bamboo pole 12 makes slight contact with the surface of the film bubble, it can effectively restrict the swing of the film bubble, reduce the risk of uneven thickness or breakage in film production, and significantly improve the stability of the blown film process and the quality of the finished product. Then, the blown film machine body 2 is started, and the blown film is blown through the blown film machine body 2. At this time, the length direction of the bamboo pole 12 is parallel to the direction of travel of the film bubble. Through the previous adjustment of the position of the bamboo pole 12, the surface of the bamboo pole 12 is now in slight contact with the outer surface of the film bubble. Then, the film bubble is pulled, and the first motor 14 is started at the same time. The first motor 14 drives the half gear 15 to rotate. The half gear 15 drives the rack 16 to slide in the support frame 13, which in turn drives the connecting frame 17 to slide. The connecting frame 17 drives the U-shaped frame 18 to reciprocate. At this time, the second motor 19 drives the fan blade 20 to rotate, and the low-speed airflow generated further stabilizes the film bubble. This structure not only achieves the function of flexibly adjusting the position of the bamboo pole 12 as needed, thereby limiting the film bubble, but also achieves the effect of further stabilizing the film bubble by generating a low-speed airflow.

[0031] 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 blown film shaping structure for a composite film blown film device, comprising a support platform (1), characterized in that: The support platform (1) is fixedly connected to the body of the blown film machine (2). The upper surface of the support platform (1) is fixedly connected to the support frame (3). The outer wall of the support frame (3) is fixedly connected to the fixing ring (4). The inner wall of the fixing ring (4) is fixedly connected to the connecting cylinder (5). The inner wall of the connecting cylinder (5) is slidably connected to the locking block (6). The inner wall of the fixing ring (4) is provided with a spring (7). The outer wall of the fixing ring (4) is rotatably connected to the support ring (8). The inner wall of the support ring (8) is provided with a slot (9). The outer wall of the locking block (6) is slidably connected to the inner wall of the slot (9). The outer wall of the support ring (8) is provided with a support component (21).

2. The blown film shaping structure of a composite membrane blown film device according to claim 1, characterized in that: The support component (21) includes a connecting block (10), the outer wall of which is fixedly connected to the outer wall of the support ring (8), and a support shaft (11) is fixedly connected inside the connecting block (10). A bamboo pole (12) is slidably connected to the outer wall of the support shaft (11), and the outer wall of the bamboo pole (12) is slidably connected to the inner wall of the connecting block (10).

3. The blown film shaping structure of a composite membrane blown film device according to claim 1, characterized in that: One end of the spring (7) is fixed to the locking block (6), and the other end abuts against the inner wall of the connecting cylinder (5).

4. The blown film shaping structure of a composite membrane blown film device according to claim 1, characterized in that: The outer wall of the card block (6) is slidably connected to the inside of the support ring (8), and the inner wall of the support ring (8) is rotatably connected to the outer wall of the support frame (3).

5. The blown film shaping structure of a composite membrane blown film device according to claim 1, characterized in that: The outer wall of the support frame (3) is fixedly connected to the support frame (13), and the outer wall of the support frame (13) is fixedly connected to the first motor (14). The output end of the first motor (14) is fixedly provided with a half gear (15), and the outer wall of the half gear (15) is rotatably connected to the inner wall of the support frame (13).

6. The blown film shaping structure of a composite membrane blown film device according to claim 5, characterized in that: The tooth end of the half gear (15) is meshed with a rack (16), and a connecting frame (17) is fixedly connected to the outer wall of the rack (16).

7. The blown film shaping structure of a composite membrane blown film device according to claim 6, characterized in that: The outer walls of the rack (16) and the connecting frame (17) are slidably connected to the inside of the support frame (13), and the outer wall of the connecting frame (17) is fixedly connected to a U-shaped frame (18).

8. The blown film shaping structure of a composite membrane blown film device according to claim 7, characterized in that: The U-shaped frame (18) is internally fixedly connected to a second motor (19), and the output end of the second motor (19) is fixedly provided with a fan blade (20).

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