A biodegradable mulching film blowing machine unit

Abstract

This utility model relates to the technical field of blown film extrusion units, and discloses a biodegradable mulch film blown film extrusion unit, including a lower support frame, a single-screw extruder, and a film winding mechanism. A second layer frame is fixedly installed on the upper end of the lower support frame, and a third layer frame is fixedly installed on the upper end of the second layer frame. A pressing mechanism is fixedly installed inside the third layer frame. A blow molding mechanism is fixedly installed at the output end of the single-screw extruder. The film winding mechanism includes a film winding bracket, and lifting sliders are slidably installed at both ends of the film winding bracket near the blow molding mechanism. A pull-down spring is connected to the lower end of each of the two lifting sliders inside the film winding bracket, and a lifting roller is installed between the two lifting sliders. In this utility model, the layer frame structure is stable, ensuring stable operation of the unit; the ladder design facilitates operation and maintenance; the film winding mechanism can automatically adjust the mulch film tension; the pressing roller ensures tight and neat film winding; and the pressing mechanism can precisely control the pressing roller to adapt to different mulch films.

Description

Technical Field

[0001] This utility model relates to the field of blown film blowing unit technology, and in particular to a biodegradable mulch film blowing unit. Background Technology

[0002] In modern agricultural production, biodegradable mulch film, with its environmentally friendly characteristics, can naturally degrade after fulfilling its functions of moisture retention, temperature increase, and weed control, effectively avoiding soil pollution problems caused by traditional mulch film residues. It has become an important material for sustainable agricultural development, and the application of biodegradable mulch film blowing machines is becoming increasingly widespread. However, existing biodegradable mulch film blowing machines face several technical bottlenecks. In the film winding process, the rollers of traditional film winding mechanisms are usually fixed. When tension fluctuations occur during the film winding process, the tightness of the mulch film cannot be automatically adjusted, resulting in the mulch film being too loose or too tight. Too loose a mulch film will cause wrinkles and misalignment between layers, affecting subsequent packaging and use; too tight a mulch film may stretch, deform, or even break, reducing the product qualification rate. Simultaneously, in the film pressing process, the traditional film pressing mechanism has a single adjustment method for the pressing rollers, making it difficult to accurately adapt to the pressing needs of biodegradable mulch films of different thicknesses and materials. Uneven pressing can easily cause unevenness on the mulch film surface, affecting product quality. In addition, the traditional blown film machine unit has insufficient overall structural coordination and lacks effective cooperation between various components, resulting in low production efficiency and difficulty in meeting the growing market demand.

[0003] Therefore, those skilled in the art have provided a biodegradable plastic film blowing machine to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a biodegradable plastic film blowing machine unit. The machine features a stable frame structure to ensure stable operation, and a ladder design for easy operation and maintenance. The film winding mechanism can automatically adjust the film tension, and the pressure rollers ensure tight and neat film winding. The film pressing mechanism can precisely control the pressing rollers to adapt to different types of plastic film. The multi-roller design improves the pressing quality, thereby comprehensively improving product quality and production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A biodegradable mulch film blowing machine unit includes a lower support frame, a single screw extruder, and a film winding mechanism. A second layer frame is fixedly installed on the upper end of the lower support frame, and a third layer frame is fixedly installed on the upper end of the second layer frame. A film pressing mechanism is fixedly installed inside the third layer frame, and a blow molding mechanism is fixedly installed at the output end of the single screw extruder.

[0007] The film winding mechanism includes a film winding bracket. Inside the film winding bracket, two lifting sliders are slidably arranged at both ends on the side near the blow molding mechanism. The lower ends of the two lifting sliders are connected to the inside of the film winding bracket by pull-down springs. A lifting roller is arranged between the two lifting sliders. A limit roller is arranged inside the film winding bracket on the side near the lifting roller.

[0008] Furthermore, a motor is fixedly installed at the bottom of the film roll bracket, and a winding roller is rotatably installed inside the film roll bracket near the upper end of the motor. The winding roller is connected to the output end of the motor by a transmission belt via a pulley.

[0009] Furthermore, a sliding frame is provided inside the film support near the winding roller, and a pressure roller is slidably and rotatably disposed inside the sliding frame.

[0010] Furthermore, the pressing mechanism includes an upper support frame, which is fixedly installed on the upper end of the second layer frame and inside the third layer frame. A herringbone limit frame is fixedly installed inside the upper support frame near the middle of the upper end. An adjustment frame is fixedly installed at the upper end of the upper support frame, and multiple pressing rollers are slidably and rotatably installed inside the adjustment frame.

[0011] Furthermore, adjusting push rods are fixedly installed on both sides inside the adjusting frame, and the two adjusting push rods are respectively connected to one side of two of the multiple pressing rollers.

[0012] Furthermore, a second climbing frame is fixedly installed on one side of the second shelf, and a first climbing ladder is installed between the third shelf and the second shelf.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model proposes a biodegradable plastic film blowing machine unit. The film winding mechanism, through the cooperation of a lifting slider, a pull-down spring, and a lifting roller, can sense the changes in tightness during the plastic film winding process in real time. When the plastic film is too loose, the pull-down spring pulls the lifting roller downward, increasing the tension on the plastic film and making it unfold and tighten. When the plastic film is too tight, the lifting roller, under the action of tension, overcomes the tension of the pull-down spring and moves upward, releasing some tension. This allows the plastic film to maintain a suitable tightness, effectively avoiding problems such as plastic film wrinkles, misalignment, and tensile tears, and significantly improving the quality and uniformity of the plastic film wound on the winding roller.

[0015] 2. This utility model proposes a biodegradable mulch film blowing machine unit. The adjusting push rod in the film pressing mechanism can flexibly adjust the position and pressure of multiple pressing rollers, which can accurately adapt to biodegradable mulch films of different thicknesses and materials, achieve uniform pressing, and ensure the flatness of the mulch film surface. At the same time, the pressure rollers always press on the winding rollers, continuously applying pressure to the wound mulch film during the film winding process, further ensuring that the mulch film is tightly and neatly wound on the winding rollers, improving the consistency and reliability of the product. Attached Figure Description

[0016] Figure 1 This is an axonometric view of the present invention;

[0017] Figure 2 This is an axonometric view of the present invention from another perspective;

[0018] Figure 3 This is an isometric view of the present invention without the third layer of the frame installed;

[0019] Figure 4 This is an axonometric schematic diagram of the film winding mechanism of this utility model.

[0020] Legend:

[0021] 1. Film winding mechanism; 2. Blow molding mechanism; 3. Single screw extruder; 4. Lower support frame; 5. Second layer frame; 6. Third layer frame; 7. First ladder; 8. Film pressing mechanism; 9. Second ladder; 101. Sliding frame; 102. Pressure roller; 103. Winding roller; 104. Drive belt; 105. Motor; 106. Film winding bracket; 107. Lifting slider; 108. Lifting roller; 109. Limiting roller; 801. Pressing roller; 802. Adjusting push rod; 803. Adjusting frame; 804. Herringbone limit frame; 805. Upper support frame. Detailed Implementation

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

[0023] Reference Figure 1-4An embodiment of this utility model is provided: a biodegradable mulch film blowing machine unit, including a lower support frame 4, a single screw extruder 3 and a film winding mechanism 1. A second layer frame 5 is fixedly installed on the upper end of the lower support frame 4, a third layer frame 6 is fixedly installed on the upper end of the second layer frame 5, a film pressing mechanism 8 is fixedly installed inside the third layer frame 6, a blow molding mechanism 2 is fixedly installed at the output end of the single screw extruder 3, a second climbing frame 9 is fixedly installed on one side of the second layer frame 5, and a first climbing ladder 7 is provided between the third layer frame 6 and the second layer frame 5.

[0024] Specifically, after the unit starts up, the single-screw extruder 3 heats the biodegradable raw material to a molten state of 160-180℃, and pushes the raw material into the blow molding mechanism 2 through screw rotation. The blow molding mechanism 2 uses an internal annular blowing device to blow the molten raw material into a cylindrical film. The film is then conveyed upwards under traction to the pressing mechanism 8 of the third shelf 6 for pressing. The lower support frame 4, the second shelf 5, and the third shelf 6 form a stable three-dimensional frame structure, providing the installation foundation and space layout for each functional component, ensuring the stable operation of the entire unit. The first ladder 7 and the second climbing frame 9 are ergonomically designed, allowing workers to safely and conveniently reach each shelf for equipment debugging, maintenance, and troubleshooting. Ultimately, the stable shelf structure ensures that the relative positions of each component are fixed during unit operation, preventing equipment displacement due to vibration and other factors, and improving the stability and reliability of the unit's operation. The reasonable ladder and climbing frame design facilitates operation and maintenance for workers, reduces labor intensity, improves work efficiency, and also ensures the safety of workers.

[0025] The film winding mechanism 1 includes a film winding bracket 106. Lifting sliders 107 are slidably arranged at both ends inside the film winding bracket 106 near the blow molding mechanism 2. Pull-down springs are connected to the lower ends of the two lifting sliders 107 and the interior of the film winding bracket 106. A lifting roller 108 is arranged between the two lifting sliders 107. A limit roller 109 is arranged inside the film winding bracket 106 near the lifting roller 108. A motor 105 is fixedly installed at the bottom inside the film winding bracket 106. A winding roller 103 is rotatably arranged inside the film winding bracket 106 near the upper end of the motor 105. A transmission belt 104 is connected between the winding roller 103 and the output end of the motor 105 via a pulley. A sliding frame 101 is arranged inside the film winding bracket 106 near the winding roller 103. A pressure roller 102 is slidably and rotatably arranged inside the sliding frame 101.

[0026] Specifically, the pressed plastic film passes through the lifting roller 108 from below, then through the limiting roller 109 from above, and is then wound onto the winding roller 103. When the tension of the plastic film changes during the winding process, if the film is too loose, the pull-down spring pulls the lifting slider 107 downwards, causing the lifting roller 108 to move downwards, increasing the tension on the film and tightening it. If the film is too tight, the tension overcomes the pull-down spring, pushing the lifting roller 108 upwards and releasing some tension. The motor 105 drives the winding roller 103 to rotate via a pulley and transmission belt 104, thus achieving the winding of the plastic film. The pressure roller 102 inside the sliding frame 101, under its own weight and the guiding action of the sliding frame 101, constantly presses against the winding roller 103, compacting the wound mulch film. The cooperation of the lifting slider 107, the pull-down spring, and the lifting roller 108 achieves automatic adjustment of the mulch film tension, ensuring that the mulch film maintains a suitable tightness during the winding process, effectively avoiding problems such as mulch film wrinkles, misalignment, and tensile tears, thus improving the quality of the rolled film. The transmission method of the motor 105 and the transmission belt 104 provides smooth transmission and low noise, providing stable speed and torque to the winding roller 103, ensuring rolling efficiency. The continuous compaction action of the pressure roller 102 makes the wound mulch film tighter and neater, facilitating subsequent packaging and transportation.

[0027] The film pressing mechanism 8 includes an upper support frame 805, which is fixedly installed on the upper end of the second layer frame 5 and inside the third layer frame 6. A herringbone limit frame 804 is fixedly installed inside the upper support frame 805 near the middle of the upper end. An adjusting frame 803 is fixedly installed at the upper end of the upper support frame 805. Multiple pressing rollers 801 are slidably and rotatably installed inside the adjusting frame 803. Adjusting push rods 802 are fixedly installed on both sides inside the adjusting frame 803. The two adjusting push rods 802 are respectively connected to one side of two of the multiple pressing rollers 801.

[0028] Specifically, the adjusting push rod 802, based on the thickness and material characteristics of the mulch film, electrically controls the movement of the pressing rollers 801 at both ends, thereby adjusting the spacing and pressure between the pressing rollers 801. Guided by the herringbone limit frame 804, the mulch film passes through the pressing rollers 801 sequentially, completing the pressing process under the squeezing action of the pressing rollers 801. This results in a smooth and flat surface for the mulch film. The electrically adjusting push rod 802 enables precise control of the position and pressure of the pressing rollers 801, allowing for quick and convenient adaptation to biodegradable mulch films of different thicknesses and materials, ensuring a uniform pressing effect. The multiple pressing rollers 801 increase the pressing area and pressing time, further improving the pressing quality and making the mulch film surface smoother, meeting the needs of different users.

[0029] Working Principle: After the biodegradable mulch film blowing unit starts, the single-screw extruder 3 heats and melts the biodegradable raw material and extrudes it, which is then blown into mulch film by the blow molding mechanism 2. The mulch film is conveyed upward to the pressing mechanism 8 in the third layer frame 6. The adjusting push rod 802 adjusts the position and pressure of the pressing roller 801 according to the characteristics of the mulch film. Under the guidance of the herringbone limit frame 804, the mulch film completes the pressing process through multiple pressing rollers 801 to ensure the flatness of the mulch film surface. The pressed mulch film passes downward through the lifting roller 108 in the film winding bracket 106. The downward pulling force generated by the lifting roller 108 under the action of the lifting slider 107 and the pull-down spring is used to initially adjust the tension of the mulch film. Then, the mulch film passes from above through the limiting roller 109. The limiting roller 109 plays a guiding and further limiting role to ensure the stability of the mulch film winding path. Subsequently, the mulch film is wound on the winding roller 103. The motor 105 drives the winding roller 103 to rotate through the pulley and the transmission belt 104 to wind the film. During the film rolling process, the lifting roller 108 continuously senses the changes in the tightness of the mulch film and adjusts the mulch film tension in real time; at the same time, the pressure roller 102 in the sliding frame 101 always presses on the winding roller 103 to compact the wound mulch film, so that the mulch film is tightly and neatly wound on the winding roller 103 until the entire film rolling process is completed.

[0030] 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 biodegradable plastic film blown film unit, comprising a lower support frame (4), a single-screw extruder (3), and a film winding mechanism (1), characterized in that: The lower support frame (4) is fixedly provided with a second layer frame (5) at the upper end, and a third layer frame (6) is fixedly provided at the upper end of the second layer frame (5). A film pressing mechanism (8) is fixedly provided inside the third layer frame (6), and a blow molding mechanism (2) is fixedly provided at the output end of the single screw extruder (3). The film winding mechanism (1) includes a film winding bracket (106). Inside the film winding bracket (106), both ends of the film winding bracket (106) are slidably provided with lifting sliders (107) on the side near the blow molding mechanism (2). The lower ends of the two lifting sliders (107) are connected to the inside of the film winding bracket (106) with pull-down springs. A lifting roller (108) is provided between the two lifting sliders (107). A limit roller (109) is provided inside the film winding bracket (106) on the side near the lifting roller (108).

2. The biodegradable plastic film blowing machine unit according to claim 1, characterized in that: A motor (105) is fixedly installed at the bottom of the film roll bracket (106). A winding roller (103) is rotatably installed inside the film roll bracket (106) near the upper end of the motor (105). A transmission belt (104) is connected between the winding roller (103) and the output end of the motor (105) through a pulley.

3. The biodegradable plastic film blowing machine unit according to claim 1, characterized in that: The film support (106) has a sliding frame (101) located inside the side near the winding roller (103), and a pressure roller (102) is slidably and rotatably located inside the sliding frame (101).

4. The biodegradable plastic film blowing machine unit according to claim 1, characterized in that: The pressing mechanism (8) includes an upper support frame (805), which is fixedly installed on the upper end of the second layer frame (5) and inside the third layer frame (6). A herringbone limit frame (804) is fixedly installed inside the upper support frame (805) near the middle of the upper end. An adjustment frame (803) is fixedly installed at the upper end of the upper support frame (805). Multiple pressing rollers (801) are slidably and rotatably installed inside the adjustment frame (803).

5. A biodegradable plastic film blowing machine unit according to claim 4, characterized in that: The adjusting frame (803) has adjusting push rods (802) fixedly installed on both sides inside. The two adjusting push rods (802) are respectively connected to one side of two of the multiple pressing rollers (801).

6. The biodegradable plastic film blowing machine unit according to claim 1, characterized in that: A second climbing frame (9) is fixedly installed on one side of the second layer (5), and a first climbing ladder (7) is installed between the third layer (6) and the second layer (5).

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