PVC (polyvinyl chloride) film spreading device

Abstract

The utility model discloses a PVC (Polyvinyl Chloride) film spreading device which comprises a film conveying frame, and a conveying line for cutting and spreading an annular film is erected at the end part of the film conveying frame; an air blowing guide cylinder which blows air to the inner side of the annular film conveyed downwards to enable two layers of films in the annular film to be blown to two sides to be unfolded and cut off conveniently is arranged on the side face of a supporting leg on one side of the film conveying frame through a supporting plate, and by arranging the air blowing guide cylinder, a telescopic rod, an air cylinder A, a driving batten and other components, effective supporting and stable unfolding of the annular film are achieved. A fan in the air-blowing guide cylinder is matched with an air outlet pipe, so that two layers of thin films of the annular film are unfolded towards the two sides, and subsequent cutting is facilitated; the telescopic rod is accurately supported on the inner side of the annular film under the control of the air cylinder A and the driving batten, the film is prevented from deviating or deforming during cutting, and the problems of cutting and unfolding caused by insufficient supporting and transverse arrangement of the cutter in the prior art are solved.

Description

Technical Field

[0001] This utility model belongs to the field of PVC film production technology, and specifically relates to a PVC film spreading device. Background Technology

[0002] PVC film, primarily composed of polyvinyl chloride, also contains other ingredients to enhance its heat resistance, toughness, and ductility. This surface film has a top layer of paint, a middle layer of PVC as its main component, and a bottom layer of adhesive. During PVC film production, the sides of the ring-shaped PVC film need to be cut open to unfold into a single-layer film in the next process. Existing film-spreading equipment often cuts through both layers of PVC film simultaneously, affecting the quality of the PVC film.

[0003] Therefore, a PVC film spreading device with announcement number "CN217807758U" includes a conveying mechanism for transporting PVC film, a driving mechanism for driving the conveying mechanism to rotate, and an annular film located on the conveying mechanism. The driving mechanism is located on both sides of the conveying mechanism, and the device also includes a cutting mechanism for cutting the sides of the annular film. This invention utilizes four rotating sleeves fitted onto the upper ends of a cutting seat and a cutting frame on a first and second support rod to transport the annular film. The sides of the annular film are cut by a cutter on the cutting frame, allowing it to be unfolded into a single-layer PVC film during the subsequent conveying process.

[0004] However, for the aforementioned PVC film spreading device, although when the lower end of the annular film is fitted onto the first support rod, the cutter between the first and second support rods cuts the side of the annular film, thereby cutting the annular structure of the annular film and continuously conveying it downwards to form a single-layer PVC film, the following obvious defects still exist in the use process: because the cutter of the aforementioned spreading device is set horizontally on the cutting frame, it can only cut the annular film from the side into two halves, and cannot unfold the annular film into a single-layer film after cutting. Utility Model Content

[0005] The purpose of this invention is to provide a PVC film spreading device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PVC film spreading device, comprising:

[0007] A film conveying frame is provided at the end of which a conveying line for cutting and unfolding annular film is mounted. On one side of the film conveying frame, a support plate is provided with an air blowing guide tube that blows air into the inner side of the downward conveying annular film, causing the two layers of film in the annular film to be blown to both sides to unfold for easy cutting. The front and rear sides of the support plate are pneumatically telescopically provided with telescopic rods that extend into the inner side of the annular film to support the annular film during cutting.

[0008] A fixed support plate is provided with leveling conveyor rollers on both sides of the upper end of the fixed support plate for leveling and conveying the cut annular film downwards via vertical plates. A pneumatic cutter for cutting and unfolding the annular film is pneumatically provided at the middle position of the inner side of the vertical plate.

[0009] Preferably, a feeding groove is provided through the inner side of the air-blowing guide cylinder and at the end of the support plate, and a telescopic rod that extends and retracts from the support plate passes through the feeding groove and enters the inner side of the annular film to provide support when the annular film enters the air-blowing guide cylinder. The telescopic rod can effectively support the annular film, prevent it from shifting or deforming during the cutting process, ensure the accuracy of the cutting, and avoid incomplete cutting or damage to the film.

[0010] Preferably, a fan is provided at the rear bottom of the air-blowing guide cylinder, and the output end of the fan is connected to an air outlet pipe with multiple air outlets. The multiple air outlets on the air outlet pipe are arranged inside the air-blowing guide cylinder on one side for blowing air towards the inner side of the annular membrane and spreading it towards the inner side walls of the air-blowing guide cylinder. The fan blows air into the inner side of the annular membrane through the air outlet pipe, which can cause the two thin films in the annular membrane to be blown to both sides and spread out. Cutting the film in the spread state is more conducive to spreading the annular membrane into a single single-layer film.

[0011] Preferably, the support plate is equipped with cylinders A on both the front and rear sides, and a drive bar is provided between one end of cylinder A. The telescopic rod is fixed at the center of the inner side of the drive bar. When the annular film is transported to the appropriate position, cylinder A pushes the drive bar, so that the telescopic rod quickly extends into the inner side of the annular film for support. After the cutting is completed, it can be retracted in time to facilitate the subsequent transport of the annular film.

[0012] Preferably, cylinders B are evenly distributed on the outside of the upright plate, and one end of cylinder B passes through the upright plate and is fixed to one side of the support of the leveling conveyor roller. The upright plate is fixed to one side of the upper surface of the fixed support plate, and a servo motor installed on the outside of the leveling conveyor roller frame is driven and connected to the rotating shaft of the leveling conveyor roller to transport the cut and unfolded annular film smoothly downward, ensuring the flatness of the film in subsequent processing and improving product quality.

[0013] Preferably, a cylinder C is provided in the middle of the inner side of the upright plate, and a protective cover is provided outside the cylinder C. The top of the protective cover is triangular in shape. The bottom of the pneumatic cutter is fixed on the cylinder C, and the pneumatic cutter is perpendicular to the material feeding channel. After the telescopic rod supports the annular membrane, the cylinder C pushes the pneumatic cutter to move downward and cut perpendicular to the material feeding channel, ensuring the accuracy of the cutting position.

[0014] Preferably, after the telescopic rod is inserted into the annular membrane and docked, the pneumatic cutter pushes out to press the annular membrane against the bottom of the telescopic rod and cuts it. The annular membrane is stably fixed at the bottom of the telescopic rod, and the pneumatic cutter can accurately cut the annular membrane, avoiding movement of the annular membrane during cutting, ensuring the integrity and accuracy of the cut, and helping to achieve the purpose of unfolding the annular membrane into a single-layer film.

[0015] Preferably, the fixed support plate is fixed to one side of the film conveying frame and located at the bottom of the support plate, and the fixed support plate and the support plate are provided with reinforcing rods on their sides, with one end of the reinforcing rods fixed to one side of the film conveying frame, so that the entire film spreading device is more stable during operation, reducing the impact of vibration or shaking on the film spreading effect, and ensuring that the device can work stably for a long time.

[0016] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This PVC film spreading device...

[0017] By incorporating components such as an air-blowing guide cylinder, a telescopic rod, cylinder A, and a drive plate, effective support and stable unfolding of the annular membrane are achieved. The blower inside the air-blowing guide cylinder, in conjunction with the air outlet pipe, unfolds the two layers of the annular membrane to both sides, facilitating subsequent cutting. Under the control of cylinder A and the drive plate, the telescopic rod precisely supports the inner side of the annular membrane, preventing film displacement or deformation during cutting. This solves the cutting and unfolding problems caused by insufficient support and the lateral placement of the cutter in existing technologies.

[0018] By utilizing a pneumatic cutter perpendicularly aligned with the feeding chute, and supported by a telescopic rod, accurate cutting position is ensured, preventing movement of the annular film during cutting and guaranteeing the integrity and precision of the cut. This successfully unfolds the annular film into a single-layer film, overcoming the limitation of existing film unfolding devices that can only cut the annular film in half and cannot fully unfold it into a single-layer film. Furthermore, by adjusting the position of the leveling conveyor roller via cylinder B, and with the drive of a servo motor, the cut and unfolded annular film can be conveyed smoothly, improving the flatness and product quality of subsequent film processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a top view of the air-blowing guide tube structure of this utility model;

[0021] Figure 3 This is a top view of the fixed support plate structure of this utility model;

[0022] Figure 4 This is a side view of the air-blowing guide tube structure of this utility model.

[0023] In the diagram: 1. Film conveyor frame; 2. Conveyor line; 3. Support plate; 4. Air-blown guide cylinder; 5. Telescopic rod; 6. Fixed support plate; 7. Vertical plate; 8. Leveling conveyor roller; 9. Pneumatic cutter; 10. Material discharge chute; 11. Fan; 12. Air outlet pipe; 13. Cylinder A; 14. Drive bar; 15. Cylinder B; 16. Servo motor; 17. Cylinder C; 18. Protective cover. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a PVC film spreading device, comprising:

[0026] The film conveyor frame 1 has a conveyor line 2 at its end for cutting and unfolding the annular film. The film conveyor frame 1 provides basic support for the entire device, ensuring that all components are in a stable position. The conveyor line 2 at the end is responsible for conveying the annular film. During the conveying process, the annular film is smoothly delivered to the subsequent cutting and unfolding process position, providing a continuous material supply for the cutting and unfolding of the annular film. On one side of the support leg of the film conveyor frame 1, there is an air blowing guide cylinder 4 through the support plate 3 to blow air into the inner side of the downward conveyed annular film, causing the two layers of film in the annular film to be blown to both sides to unfold and facilitate cutting. The front and rear sides of the support plate 3 are pneumatically telescopically equipped with telescopic rods 5 that extend into the inner side of the annular film to support it during the cutting of the annular film. The cylinders A13 on the front and rear sides of the support plate 3 control the movement of the drive plate 14 to achieve precise control of the extension and retraction of the telescopic rods 5.

[0027] A fixed support plate 6 has two leveling conveyor rollers 8 on both sides of its upper end via vertical plates 7 for leveling and conveying the cut annular film downwards. A cylinder B15 on the outside of vertical plate 7 can adjust the position of the leveling conveyor rollers 8 to accommodate annular films of different thicknesses and materials. A pneumatic cutter 9 is pneumatically mounted in the middle of the inner side of vertical plate 7 to cut and unfold the annular film. A cylinder C17 in the middle of the inner side of vertical plate 7 precisely controls the raising and lowering of the pneumatic cutter 9. After the telescopic rod 5 supports the annular film, cylinder C17 pushes the pneumatic cutter 9 downwards, perpendicularly corresponding to the material feeding trough 10 for cutting.

[0028] A feeding groove 10 is provided inside the air-blowing guide cylinder 4 and at the end of the support plate 3. A telescopic rod 5, which extends and retracts from the support plate 3, passes through the feeding groove 10 and enters the annular membrane through the air-blowing guide cylinder 4 to connect and support it. The air-blowing guide cylinder 4 blows air into the annular membrane through its internal fan 11 and air outlet pipe 12, causing the two layers of the annular membrane to unfold to both sides, expanding the inner diameter of the annular membrane and creating favorable conditions for subsequent cutting and unfolding operations. The feeding groove 10, located inside the air-blowing guide cylinder 4 and at the end of the support plate 3, serves not only as a conveying channel for the annular membrane but also as a path for the telescopic rod 5 to extend into the annular membrane, ensuring its stability during cutting and preventing cutting deviations due to shaking.

[0029] A fan 11 is provided at the rear bottom of the air blowing guide cylinder 4, and the output end of the fan 11 is connected to an air outlet pipe 12 with multiple air outlets. The multiple air outlets on the air outlet pipe 12 are arranged inside the air blowing guide cylinder 4 on one side for blowing air into the inner side of the annular membrane and spreading it towards the inner two side walls of the air blowing guide cylinder 4.

[0030] Cylinders A13 are installed on both the front and rear sides of the support plate 3, and a drive strip 14 is installed between one end of each cylinder A13. The telescopic rod 5 is fixed at the center of the inner side of the drive strip 14. Cylinder A13 pushes the drive strip 14, causing the telescopic rod 5 to quickly extend into the inner side of the annular film. During the annular film cutting process, the telescopic rod 5 supports the annular film, preventing it from deforming or shifting under the cutting force, ensuring that the pneumatic cutter 9 can accurately cut the annular film, and ensuring the integrity and precision of the cut. After cutting, cylinder A13 controls the telescopic rod 5 to retract in time, facilitating the subsequent transport of the annular film.

[0031] Cylinders B15 are evenly arranged on the outside of the upright plate 7, and one end of the cylinder B15 passes through the upright plate 7 and is fixed to one side of the bracket of the leveling conveyor roller 8. The upright plate 7 is fixed to one side of the upper end face of the fixed support plate 6. The shaft of the leveling conveyor roller 8 is connected to a servo motor 16 installed on the outside of the roller frame of the leveling conveyor roller 8. The leveling conveyor roller 8 rotates at a uniform speed under the drive of the servo motor 16, and conveys the annular film downwards smoothly. This process not only ensures the flatness of the film during subsequent processing and improves product quality, but also provides stable conveying power for the cut annular film, making the entire film spreading process smooth and continuous. It avoids secondary damage to the cut annular film caused by unstable conveying. Furthermore, after the annular film is cut, the leveling conveying roller 8 on one side of the upright plate 7 does not work to clamp it, preventing the film from being pulled and torn into two pieces in both directions after being cut. Therefore, it is only necessary to have the cylinder B15 on one side of the upright plate work to make the leveling conveying roller 8 press against one end of the cut film against one side of the protective cover 18 and convey it downward. Moreover, the leveling conveying rollers 8 on both sides of the upright plate 7 can work alternately to level and convey the cut film downward, so as to output the unfolded whole film downward.

[0032] A cylinder C17 is located in the center of the inner side of the upright plate 7, and a protective cover 18 is provided outside the cylinder C17. The top of the protective cover 18 is triangular. The bottom of the pneumatic cutter 9 is fixed on the cylinder C17, and the pneumatic cutter 9 is perpendicularly aligned with the feeding groove 10. After the telescopic rod 5 is inserted into the annular film and docked, the pneumatic cutter 9 pushes out, pressing the annular film against the bottom of the telescopic rod 5 and cutting it. Due to the precise alignment with the feeding groove 10, the accuracy of the cutting position is ensured, improving cutting efficiency and quality. The protective cover 18 is located outside the cylinder C17. Its triangular design at the top protects the cylinder C17 from external interference and guides the film to pass smoothly during film conveying, preventing the film from scratching the cylinder C17 and other components, and ensuring the integrity of the annular film during the cutting process.

[0033] The fixed support plate 6 is fixed to one side of the film conveyor frame 1 and located at the bottom of the support plate 3. Reinforcing rods are provided on the sides of both the fixed support plate 6 and the support plate 3, with one end of each reinforcing rod fixed to one side of the film conveyor frame 1. The fixed support plate 6, fixed to one side of the film conveyor frame 1 and located at the bottom of the support plate 3, provides a stable support foundation for the entire device. The reinforcing rods on the sides of the fixed support plate 6 and the support plate 3 further enhance the connection strength between them. During the annular film cutting and spreading process, the entire device is subjected to various forces. The reinforcing rods effectively reduce the impact of vibration or shaking on the spreading effect, ensuring the device can operate stably for a long time and providing reliable equipment support for the cutting and spreading of the annular film.

[0034] Specifically, during use, the film conveyor frame 1 provides basic support, and the conveyor line 2 at its end is responsible for smoothly conveying the annular film to the subsequent process position, ensuring the continuity of material supply. When the annular film is conveyed to the air-blowing guide cylinder 4, the fan 11 at the bottom rear of the air-blowing guide cylinder 4 blows air into the inside of the annular film through the air outlet pipe 12, causing the two layers of film of the annular film to unfold to both sides, expanding the inner diameter and creating conditions for subsequent operations. At the same time, the cylinders A13 on the front and rear sides of the support plate 3 push the drive strip plate 14, causing the telescopic rod 5 to quickly pass through the feeding groove 10 and extend into the inside of the annular film for support, preventing the annular film from deforming or shifting during cutting.

[0035] After the telescopic rod 5 supports the annular film, the cylinder C17 in the middle of the inner side of the upright plate 7 pushes the pneumatic cutter 9 downwards, perpendicularly corresponding to the feeding channel 10, and cuts the annular film against the bottom of the telescopic rod 5, ensuring accurate cutting position and improving cutting efficiency and quality. After the annular film is cut, the cylinder B15 on the outside of the upright plate 7 adjusts the position of the leveling conveyor roller 8 to accommodate different films. The servo motor 16 drives the leveling conveyor roller 8 to rotate at a uniform speed, smoothly conveying the cut and unfolded annular film downwards. The leveling conveyor rollers 8 on both sides inside the upright plate 7 can work alternately, and at the moment of cutting, one side of the leveling conveyor roller 8 does not work to clamp, avoiding the film being pulled and torn in both directions. Only one side of the cylinder B15 needs to work to make the leveling conveyor roller 8 press one end of the cut film against one side of the protective cover 18 and convey it downwards.

[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 PVC film unwinding device, characterized in that, Include: Thin film conveying frame (1), the conveying line (2) for cutting and unfolding the annular film conveying is erected at the end of the thin film conveying frame (1), the side support plate (3) is provided with the air blowing guide cylinder (4) for blowing the inside of the annular film downward to make the two layers of film in the annular film blow and unfold to the two sides and facilitate cutting, the telescopic rod (5) for supporting in the annular film cutting is arranged on the front and rear sides of the support plate (3) by pneumatic telescopic; The fixed support plate (6) is provided with the leveling conveying roller (8) for leveling and downward conveying the annular film after cutting on the upper end of the fixed support plate (6) through the vertical plate (7), and the pneumatic cutter (9) for cutting and unfolding the annular film is arranged in the middle of the inner side of the vertical plate (7).

2. The PVC film unwinding device according to claim 1, characterized in that: The inside of the air blowing guide cylinder (4) and the end of the support plate (3) are provided with a discharging slot (10), and the telescopic rod (5) arranged on the front and rear sides of the support plate (3) supports the annular film when the annular film enters the air blowing guide cylinder (4) through the discharging slot (10) and is connected to the inside of the annular film.

3. The PVC film unwinding device according to claim 1, characterized in that: The bottom end of the rear side of the air blowing guide cylinder (4) is provided with a fan (11), and the output end of the fan (11) is connected with an air outlet pipe (12) with multiple air outlet pipe openings, and the multiple air outlet pipe openings on the air outlet pipe (12) are arranged on the inside of the air blowing guide cylinder (4) for blowing the inside of the annular film to the two side walls of the air blowing guide cylinder (4).

4. The PVC film unwinding device according to claim 1, characterized in that: The front and rear sides of the support plate (3) are provided with air cylinders A (13), and the driving strip plate (14) is arranged between one end of the air cylinders A (13), and the telescopic rod (5) is fixed to the inside center position of the driving strip plate (14).

5. The PVC film unwinding device according to claim 1, characterized in that: The outside of the vertical plate (7) is uniformly provided with air cylinders B (15), one end of the air cylinders B (15) penetrates the vertical plate (7) and is fixed to one side of the support of the leveling conveying roller (8), the vertical plate (7) is fixed to one side of the upper end surface of the fixed support plate (6), and the servo motor (16) mounted on the outside of the roller support of the leveling conveying roller (8) is drivingly connected to the rotating shaft of the leveling conveying roller (8).

6. The PVC film unwinding device according to claim 2, characterized in that: The inside middle part of the vertical plate (7) is provided with an air cylinder C (17), and the air cylinder C (17) is provided with a protective cover (18) outside, and the top end of the protective cover (18) is triangular, the bottom of the pneumatic cutter (9) is fixed on the air cylinder C (17), and the pneumatic cutter (9) is vertically corresponding to the discharging slot (10).

7. The PVC film unwinding device according to claim 1, characterized in that: After the telescopic rod (5) penetrates into the inside of the annular film, the pneumatic cutter (9) is ejected to cut the annular film on the bottom of the telescopic rod (5).

8. The PVC film unwinding device according to claim 1, characterized in that: The fixed support plate (6) is fixed to one side of the thin film conveying frame (1) and is located at the bottom of the support plate (3), and the fixed support plate (6) and the support plate (3) are provided with reinforcing rods on the side surface, and one end of the reinforcing rod is fixed to one side of the thin film conveying frame (1).

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