Flattening device for degradable plastic bags

Abstract

The utility model relates to the technical field of degradable plastic bags, and discloses a flattening device for degradable plastic bags, which comprises a flattening platform, the top surface of the flattening platform is movably matched with a conveying belt, and the conveying belt is used for conveying the degradable plastic bags; a lifting assembly is arranged above the pressing platform, the lifting end of the lifting assembly is connected with a balancing weight, and the pressing roller is rotationally connected to the bottom end of the balancing weight; the positioning roller is arranged at the front end of the flattening roller in the conveying direction of the conveying belt, a control piece is arranged on the pressing platform, the control end of the control piece is connected with the positioning roller, so that the positioning roller has a switchable lifting or fixing state in the vertical direction, and the positioning roller is rotationally connected with the pressing platform. The flattening efficiency of the degradable plastic bag can be improved, and the flattening effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of biodegradable plastic bag technology, and in particular to a flattening device for biodegradable plastic bags. Background Technology

[0002] Biodegradable plastic bags are plastics that have been modified during the production process by adding certain additives, such as starch, cellulose, and biodegradable agents, to make them easier to degrade in the natural environment. They have a wide range of applications.

[0003] In the production of biodegradable plastic bags, the bags need to be flattened. In existing technologies, such as the flattening device for biodegradable plastic bag production described in patent CN221969099U, the plastic bag is flattened using a pressing platform and a flattening block. However, each flattening operation only flattens the area below the flattening block, requiring multiple repetitions to flatten the entire bag. During flattening, the high friction between the flattening block and the plastic bag can easily cause wrinkles to form during movement, and it also reduces the efficiency of flattening large quantities of bags, thus presenting certain drawbacks. Utility Model Content

[0004] The purpose of this invention is to provide a flattening device for biodegradable plastic bags to solve the problems existing in the prior art, thereby improving the flattening efficiency and enhancing the flattening effect of biodegradable plastic bags.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a flattening device for biodegradable plastic bags, comprising:

[0006] The platform has a conveyor belt that is movably fitted on its top surface, and the conveyor belt is used to transport biodegradable plastic bags.

[0007] A flattening roller is provided above the pressing platform, and a lifting assembly is provided above the lifting platform. A counterweight is connected to the lifting end of the lifting assembly, and the flattening roller is rotatably connected to the bottom end of the counterweight.

[0008] A positioning roller is disposed at the front end of the flattening roller along the conveyor belt conveying direction. A control component is disposed on the pressing platform. The control end of the control component is connected to the positioning roller so that the positioning roller has a switchable lifting or fixed state in the vertical direction. The positioning roller is rotatably connected to the pressing platform.

[0009] Preferred options also include:

[0010] The constant temperature unit includes a slot on the bottom surface of the counterweight block, a flattening roller that rotates into the slot along the width of the conveyor belt, and the bottom end of the flattening roller extends out of the slot. The constant temperature unit includes a constant temperature plate fixed in the slot, with the heating end of the constant temperature plate facing the portion of the flattening roller located in the slot.

[0011] Preferably, a pair of constant temperature plates are provided, and the constant temperature plates have an arc-shaped structure. The pair of constant temperature plates are distributed opposite to each other, and the concave side of the constant temperature plate faces the side wall of the flattening roller.

[0012] Preferred options also include:

[0013] A pair of scrapers are arranged opposite each other on both sides of the bottom edge of the trough. The scrapers are fixed to the counterweight and slide in contact with the flattening roller.

[0014] Preferably, the control element includes:

[0015] A pair of support plates are fixedly connected to each other on both sides of the top surface of the pressing platform. A sliding groove is provided on the side of the pair of support plates that are close to each other. A slider is slidably connected in the sliding groove. The two ends of the positioning roller are rotatably connected to the two sliders that are arranged opposite to each other.

[0016] The screw is vertically connected to the groove, and the slider is threaded onto the screw.

[0017] Preferably, the top end of the screw extends out of the support plate and is fixedly connected to a throttle.

[0018] Preferably, the lifting assembly includes:

[0019] A gantry frame is fixed to the top surface of the pressing platform. A cylinder is fixed to the top of the gantry frame, and the piston end of the cylinder is fixed to the counterweight block vertically downward.

[0020] A limiting component is provided inside the gantry frame, and the limiting end of the limiting component is connected to the counterweight block so that the counterweight block slides vertically against the gantry frame.

[0021] Preferably, the limiting component includes two pairs of limiting seats respectively fixed to both sides of the inner wall of the gantry frame. Any pair of the limiting seats is arranged on both sides of the counterweight along the length direction of the pressing platform. Limiting rods are fixed to both sides of the counterweight. A limiting groove is formed on the side of the limiting seat near the counterweight. The limiting rod slides in contact with the limiting groove.

[0022] The present invention discloses the following technical effects:

[0023] This technical solution utilizes a conveyor belt to transport plastic bags. First, a positioning roller presses the biodegradable plastic bag, positioning and shaping it. The height of the positioning roller is adjusted by a control component, and the positioning roller is fixed relative to the pressing platform to ensure the compression of the plastic bag. Compared to traditional technologies that design the flattening block as an elastic lifting structure, this improves the subsequent flattening effect on the plastic bag. A flattening roller located at the rear end of the positioning roller flattens the plastic bag, and a counterweight enhances the flattening stability of the flattening roller, strengthening the effect of squeezing out air bubbles from the plastic bag, thus achieving flattening. Furthermore, the flattening roller and the counterweight are rotatably connected, combined with the conveyor belt transporting the plastic bag, thereby improving the flattening efficiency of the biodegradable plastic bag. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a diagram showing the positional relationship between the conveyor belt and the gantry in this utility model;

[0026] Figure 2 This is a diagram showing the connection relationship between the medium-pressure platform and the conveyor belt of this utility model;

[0027] Figure 3 This is a diagram showing the connection relationship between the counterweight and the limiting seat in this utility model;

[0028] Figure 4 This is a diagram showing the connection relationship between the slider and the screw in this utility model;

[0029] Figure 5 This is a diagram showing the connection relationship between the medium-pressure flat roller and the constant temperature plate of this utility model;

[0030] The components include: 1. Pressing platform; 2. Pressing roller; 3. Conveyor belt; 4. Positioning roller; 5. Counterweight; 6. Thermostatic plate; 7. Controller; 8. Scraper; 9. Support plate; 10. Slider; 11. Screw; 12. Rotary handle; 13. Gantry frame; 14. Cylinder; 15. Limit seat; 16. Limit rod. Detailed Implementation

[0031] 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.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1-5 This utility model provides a flattening device for biodegradable plastic bags, comprising:

[0034] The pressure platform 1 has a conveyor belt 3 that is movable on its top surface. The conveyor belt 3 is used to transport biodegradable plastic bags.

[0035] A lifting assembly is provided above the pressing roller 2 and the pressing platform 1. The lifting end of the lifting assembly is connected to a counterweight 5, and the pressing roller 2 is rotatably connected to the bottom end of the counterweight 5.

[0036] The positioning roller 4 is set at the front end of the flattening roller 2 along the conveying direction of the conveyor belt 3. The pressing platform 1 is equipped with a control component, the control end of which is connected to the positioning roller 4 so that the positioning roller 4 has a switchable lifting or fixed state in the vertical direction. The positioning roller 4 is rotatably connected to the pressing platform 1.

[0037] This technical solution utilizes a conveyor belt 3 to transport plastic bags. First, the biodegradable plastic bags are rolled and positioned by a positioning roller 4. The height of the positioning roller 4 is adjusted by a control component, and the positioning roller 4 is fixed relative to the pressing platform 1 to ensure the pressing effect on the plastic bags. Compared with the traditional technology that designs the flattening block as an elastic lifting structure, this can improve the subsequent flattening effect on the plastic bags. The plastic bags are flattened by a flattening roller 2 set at the rear end of the positioning roller 4. The flattening stability of the flattening roller 2 is improved by a counterweight 5, which enhances the effect of squeezing out air bubbles in the plastic bags and achieves flattening. The flattening roller 2 and the counterweight 5 are rotatably connected. Combined with the transport of the plastic bags by the conveyor belt 3, the flattening efficiency of the biodegradable plastic bags is improved.

[0038] In addition, by using the lifting component to control the lifting of the counterweight 5, while ensuring that the flattening roller 2 is in contact with the plastic bag, the distance between the flattening roller 2 and the pressing platform 1 can be adjusted, and multiple overlapping plastic bags can be selectively flattened at one time.

[0039] It is understandable that the top surface of the pressing platform 1 slides in contact with the conveyor belt 3 during the process of pressing the flattening roller 2, and the pressing platform 1 can provide a reverse support force.

[0040] Furthermore, in this technical solution, the conveying power is provided only by the conveyor belt 3, and the flattening roller 2 and the positioning roller 4 are in rolling contact with the conveyor belt 3 through the plastic bag to generate rotational force.

[0041] Furthermore, it also includes:

[0042] The constant temperature unit has a slot on the bottom surface of the counterweight 5. The flattening roller 2 is connected to the slot along the width direction of the conveyor belt 3, and the bottom end of the flattening roller 2 extends out of the slot. The constant temperature unit includes a constant temperature plate 6 fixed in the slot, and the heating end of the constant temperature plate 6 faces the part of the flattening roller 2 located in the slot.

[0043] The constant temperature unit is used to heat the flattening roller 2 at a constant temperature. When the flattening roller 2 rolls and contacts the plastic bag to flatten it, the high temperature can promote the shaping of the plastic bag and improve the flattening effect. Understandably, the constant temperature heating temperature is best between 40-60 degrees Celsius.

[0044] Furthermore, a pair of constant temperature plates 6 are provided, and the constant temperature plates 6 have an arc-shaped structure. The pair of constant temperature plates 6 are distributed opposite to each other, and the concave side of the constant temperature plates 6 faces the side wall of the flattening roller 2.

[0045] By installing a controller 7 in the counterweight 5 and connecting the controller 7 to the constant temperature plate 6, the constant temperature plate 6 can be energized and heated when needed. The constant temperature plate 6 is designed with an arc-shaped structure to increase the contact surface with the flattening roller 2 and improve the heating effect.

[0046] Furthermore, it also includes:

[0047] A pair of scrapers 8 are arranged opposite each other on both sides of the bottom edge of the trough. The scrapers 8 are fixed to the counterweight 5 and slide in contact with the flattening roller 2.

[0048] The scraper 8 is made of rubber and rotates through rolling contact between the flattening roller 2 and the conveyor belt 3. During the rotation of the flattening roller 2, the scraper 8 can clean the surface of the flattening roller 2 to improve the flattening effect on the plastic bag.

[0049] Furthermore, the control components include:

[0050] A pair of support plates 9 are fixedly connected to each other on both sides of the top surface of the pressing platform 1. A sliding groove is provided on the side of the pair of support plates 9 that is close to each other. A slider 10 is slidably connected in the sliding groove. The two ends of the positioning roller 4 are rotatably connected to the two sliders 10 that are arranged opposite to each other.

[0051] The screw 11 is vertically connected to the slide groove, and the slider 10 is threaded onto the screw 11.

[0052] Furthermore, the top of the screw 11 extends out of the support plate 9 and is fixedly connected to the throttle 12.

[0053] By rotating the screw 11 to adjust the height of the slider 10, the slider 10 on the pair of support plates 9 rotates and supports the positioning roller 4 in the horizontal direction. By adjusting the distance between the positioning roller 4 and the conveyor belt 3, the thickness of the plastic bag to be flattened is adapted, so that the positioning roller 4 can roll and contact the conveyor belt 3 through the plastic bag. The threaded connection between the screw 11 and the slider 10 improves the connection stability between the slider 10 and the pressing platform 1 and enhances the positioning and pressing effect of the positioning roller 4.

[0054] Furthermore, the lifting assembly includes:

[0055] Gantry 13 is fixed to the top surface of the pressing platform 1. A cylinder 14 is fixed to the top of the gantry 13. The piston end of the cylinder 14 is fixed to the counterweight 5 vertically downward.

[0056] A limiting component is installed inside the gantry frame 13. The limiting end of the limiting component is connected to the counterweight block 5 so that the counterweight block 5 slides in a vertical direction with the gantry frame 13.

[0057] The counterweight 5 is limited by a limiting component to improve its sliding stability. The counterweight 5 is lifted and lowered by a cylinder 14, and the counterweight 5 drives the flattening roller 2 to flatten the plastic bag.

[0058] Furthermore, the limiting component includes two pairs of limiting seats 15 respectively fixed to both sides of the inner wall of the gantry frame 13. Any pair of limiting seats 15 is arranged on both sides of the counterweight block 5 along the length direction of the pressure platform 1. Limiting rods 16 are fixed to both sides of the counterweight block 5 respectively. A limiting groove is opened on the side of the limiting seat 15 near the counterweight block 5, and the limiting rod 16 slides with the limiting groove.

[0059] By setting four limit seats 15 and four corresponding limit rods 16, the four limit rods 16 are distributed at the four corners of the counterweight 5 to ensure the lifting and lowering limit function of the counterweight 5.

[0060] The working principle of the flattening device for biodegradable plastic bags of this utility model:

[0061] The biodegradable plastic bag is placed on the conveyor belt 3. As the conveyor belt 3 moves, the plastic bag first passes through the positioning roller 4. The bottom end of the positioning roller 4 rolls into contact with the top surface of the plastic bag, while the bottom surface of the plastic bag abuts against the top surface of the conveyor belt 3. The positioning roller 4 is stabilized by the screw 11 and the slider 10, thereby positioning and pressing the plastic bag. After the plastic bag is pressed, as the conveyor belt 3 continues to move, the plastic bag moves to below the counterweight 5. The counterweight 5 is lowered by the cylinder 14, and the limit seat 15 and the limit rod 16 stabilize the counterweight 5, causing the flattening roller 2 to press down and roll into contact with the plastic bag. The flattening roller 2 is heated by the constant temperature plate 6 to flatten the plastic bag. Finally, after the plastic bag passes the counterweight 5, the workers can collect the flattened plastic bag after it has been deflated and the air bubbles have been removed.

[0062] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0063] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A flattening device for biodegradable plastic bags, characterized in that, include: The pressure platform (1) has a conveyor belt (3) that is movably fitted on its top surface. The conveyor belt (3) is used to transport biodegradable plastic bags. A flattening roller (2) is provided above the pressing platform (1), and a lifting assembly is provided above the pressing platform (1). The lifting end of the lifting assembly is connected to a counterweight (5), and the flattening roller (2) is rotatably connected to the bottom end of the counterweight (5). A positioning roller (4) is arranged at the front end of the flattening roller (2) along the conveying direction of the conveyor belt (3). A control component is provided on the pressing platform (1). The control end of the control component is connected to the positioning roller (4) so ​​that the positioning roller (4) has a switchable lifting or fixed state in the vertical direction. The positioning roller (4) is rotatably connected to the pressing platform (1).

2. The flattening device for biodegradable plastic bags according to claim 1, characterized in that, Also includes: The constant temperature unit has a slot on the bottom surface of the counterweight (5), the flattening roller (2) is rotated in the slot along the width direction of the conveyor belt (3), and the bottom end of the flattening roller (2) extends out of the slot. The constant temperature unit includes a constant temperature plate (6) fixed in the slot, and the heating end of the constant temperature plate (6) faces the part of the flattening roller (2) located in the slot.

3. The flattening device for biodegradable plastic bags according to claim 2, characterized in that: The constant temperature plate (6) is provided in a pair, and the constant temperature plate (6) has an arc-shaped structure. The pair of constant temperature plates (6) are distributed opposite to each other, and the concave side of the constant temperature plate (6) faces the side wall of the flattening roller (2).

4. The flattening device for biodegradable plastic bags according to claim 2, characterized in that, Also includes: A pair of scrapers (8) are arranged opposite each other on both sides of the bottom edge of the trough. The scrapers (8) are fixed to the counterweight (5) and the scrapers (8) are in sliding contact with the flattening roller (2).

5. The flattening device for biodegradable plastic bags according to claim 1, characterized in that, The control component includes: A pair of support plates (9) are fixedly connected to each other on both sides of the top surface of the pressing platform (1). A sliding groove is provided on the side of the pair of support plates (9) that are close to each other. A slider (10) is slidably connected in the sliding groove. The two ends of the positioning roller (4) are rotatably connected to the two sliders (10) that are arranged opposite to each other. The screw (11) is vertically connected in the groove, and the slider (10) is threaded onto the screw (11).

6. The flattening device for biodegradable plastic bags according to claim 5, characterized in that: The top end of the screw (11) extends out of the support plate (9) and is fixedly connected to the throttle (12).

7. The flattening device for biodegradable plastic bags according to claim 1, characterized in that, The lifting assembly includes: A gantry frame (13) is fixed to the top surface of the pressing platform (1). A cylinder (14) is fixed to the top of the gantry frame (13). The piston end of the cylinder (14) is fixed to the counterweight (5) vertically downward. A limiting component is provided inside the gantry frame (13). The limiting end of the limiting component is connected to the counterweight block (5) so that the counterweight block (5) slides in a vertical direction with the gantry frame (13).

8. The flattening device for biodegradable plastic bags according to claim 7, characterized in that: The limiting component includes two pairs of limiting seats (15) respectively fixed to both sides of the inner wall of the gantry (13). Any pair of the limiting seats (15) is arranged on both sides of the counterweight (5) along the length direction of the pressure platform (1). Limiting rods (16) are fixed to both sides of the counterweight (5). A limiting groove is opened on the side of the limiting seat (15) near the counterweight (5). The limiting rod (16) slides with the limiting groove.

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