A powder-spreading device for uniformly spreading powder onto PVC calendered transparent film.

Abstract

This utility model belongs to the field of transparent film processing, and particularly relates to a powder-spreading device for uniformly spreading powder onto PVC calendered transparent film. This utility model provides a powder-spreading device for uniformly spreading powder onto PVC calendered transparent film, comprising: a powder-spreading mechanism, which includes a frame, a powder-spreading roller, a storage bin, and a drive assembly. The powder-spreading roller is rotatably connected to the inner side of the frame, and the drive assembly is installed at one end of the outer side of the frame to drive the powder-spreading roller to rotate and spread powder. The outer periphery of the powder-spreading roller has several powder storage grooves, and the storage bin is connected to the frame via a bracket; a cleaning mechanism, located on one side of the frame, comprising two mounting plates installed at one end of a connecting frame. The cleaning mechanism achieves quantitative powder delivery through the powder storage grooves of the powder-spreading mechanism. A brush roller of the cleaning mechanism rotates synchronously with the powder-spreading roller, enabling real-time cleaning of residual powder on the outer periphery of the powder-spreading roller, preventing uneven powder spreading on the film surface caused by residual powder accumulation and clumping.

Description

Technical Field

[0001] This utility model belongs to the field of transparent film processing, and in particular relates to a powder-spreading device for uniformly spreading powder on PVC calendered transparent film. Background Technology

[0002] In the production process of PVC calendered transparent film, in order to avoid the film from sticking together when stacking, it is usually necessary to evenly spread anti-sticking powder on the film surface through a powder spreading device. The powder spreading roller is the core component of this device to realize the quantitative conveying and spreading of powder. However, the existing powder spreading device has obvious shortcomings in use: the surface of the powder spreading roller is prone to powder adsorption and adhesion, forming residues. After the residual powder accumulates, it is easy to clump, which leads to uneven powder spreading on the film surface and affects product quality. At the same time, most of these residual powders are directly discarded without effective recycling, resulting in waste of raw materials. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a powder-spreading device for uniformly spreading powder on PVC calendered transparent film. The device achieves quantitative powder delivery through the powder storage tank of the powder-spreading mechanism. The brush roller of the cleaning mechanism rotates synchronously with the powder-spreading roller, which can clean the residual powder on the outer periphery of the powder-spreading roller in real time, avoiding uneven powder spreading on the film surface caused by the accumulation and clumping of residual powder.

[0004] In view of this, the present invention provides a powder-spreading device for uniformly spreading powder onto PVC calendered transparent film, comprising:

[0005] The powder spreading mechanism includes a frame, a powder spreading roller, a storage bin, and a drive assembly. The powder spreading roller is rotatably connected to the inner side of the frame, and the drive assembly is installed at one end of the outer side of the frame to drive the powder spreading roller to rotate and spread powder. The outer periphery of the powder spreading roller is provided with several powder storage grooves, and the storage bin is connected to the frame through a bracket.

[0006] A cleaning mechanism is located on one side of the frame. The cleaning mechanism includes two mounting plates installed at one end of the connecting frame. A rotating shaft is rotatably connected between the two mounting plates. A brush roller is fixedly connected to the outer periphery of the rotating shaft. A transmission component is provided between one end of the rotating shaft and one end of the powder-spreading roller. The transmission component is used to realize the synchronous rotation of the brush roller and the powder-spreading roller, clean the residual powder on the outer periphery of the powder-spreading roller, and improve the uniformity of powder spreading on the film surface.

[0007] In this technical solution, the powder is quantitatively conveyed through the powder storage tank of the powder spreading mechanism. The brush roller of the cleaning mechanism rotates synchronously with the powder spreading roller, which can clean the residual powder on the outer periphery of the powder spreading roller in real time, avoiding uneven powder spreading on the film surface caused by the accumulation and clumping of residual powder.

[0008] Furthermore, the transmission assembly includes a driven sprocket mounted on a rotating shaft and a driving sprocket mounted at one end of the brush roller, with a chain meshing between the driving sprocket and the driven sprocket.

[0009] In this technical solution, the transmission assembly composed of sprockets and chains can stably transmit the rotational power of the powder-spreading roller, ensuring that the brush roller and the powder-spreading roller rotate at the same speed, avoiding incomplete cleaning due to transmission deviation, and further enhancing the cleaning effect of residual powder.

[0010] Furthermore, the driving component is a drive motor, and the driving end of the drive motor is connected to the center of one end of the powder-spreading roller.

[0011] In this technical solution, a drive motor provides stable power to the powder-spreading roller, avoiding uneven powder supply to the powder storage tank due to insufficient power or speed fluctuations, thus ensuring a stable amount of powder spread on the film surface.

[0012] Furthermore, a collection box is provided on the frame below the brush roller, and a fixing bolt passes through the end of the collection box away from the frame, and the fixing bolt is threaded to the surface of the frame.

[0013] In this technical solution, the collection box can collect the residual powder after the brush roller is cleaned, so as to realize the recycling of powder and reduce the waste of raw materials.

[0014] Furthermore, a protective baffle is fixedly connected to the top outer periphery of the collection box.

[0015] In this technical solution, the protective baffle can prevent the powder in the collection box from flying during the recycling process, avoid the powder from scattering and polluting the equipment or environment, reduce additional powder loss, and further improve the recycling rate of residual powder.

[0016] Furthermore, a connecting plate is fixedly connected to one end of the frame away from the collection box, and a connecting shaft is provided between the two connecting plates. A pressure roller is fixedly connected to the outer periphery of the connecting shaft. Limiting rings are fitted on both sides of the outer periphery of the pressure roller. The pressure roller is made of soft silicone material, and the axis of the pressure roller is parallel to the axis of the powder-spreading roller.

[0017] In this technical solution, the soft silicone roller can compact the loose powder on the film surface, preventing the powder from falling off and sticking when the films are stacked. The limiting ring can restrict the powder from being squeezed out to the edge of the film, ensuring that the powder distribution on the film surface is regular. In addition, the roller and the powder-spreading roller are parallel to each other, ensuring uniform pressing.

[0018] Furthermore, each of the two connecting plates has a sliding groove at one end, and a slider is slidably connected in each of the two sliding grooves. The connecting shaft is rotatably connected between the two sliders, and a spring is fixedly connected between the bottom of the inner cavity of each of the two sliding grooves and the two sliders, respectively.

[0019] In this technical solution, the chute and slider work together with the spring to enable the pressure roller to adapt to the slight undulations of the PVC film surface, avoiding localized incomplete pressing or damage to the film due to uneven film surface, ensuring consistent powder compaction effect across the entire film surface, and improving pressing reliability.

[0020] Furthermore, bolts are inserted through the top of both limiting rings, and one end of the bolts rubs against the surface of the pressure roller.

[0021] In this technical solution, the bolt can adjust the position of the limiting ring on the pressure roller to adapt to PVC calendered transparent films of different widths, avoid the failure of the limiting ring due to changes in film width, and increase the versatility of the device.

[0022] Furthermore, the storage bin has openings at both the top and bottom, and the bottom of the storage bin is arc-shaped. The bottom of the storage bin is attached to the top of the powder spreading roller, and a sealing gasket is fixedly connected to the bottom of the storage bin. The sealing gasket is made of rubber.

[0023] In this technical solution, the arc-shaped bottom of the storage bin fits against the top of the powder-spreading roller. With the help of a sealing gasket, powder leakage from the gap between the storage bin and the powder-spreading roller can be reduced, avoiding powder waste and fluctuations in the amount of powder spread. The upper and lower openings facilitate powder replenishment and falling, ensuring a continuous and stable powder supply from the storage bin.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model achieves quantitative powder delivery through the powder storage tank of the powder spreading mechanism. The brush roller of the cleaning mechanism rotates synchronously with the powder spreading roller, which can clean the residual powder on the outer periphery of the powder spreading roller in real time, avoiding uneven powder spreading on the film surface caused by the accumulation and clumping of residual powder.

[0026] 2. The soft silicone roller in this utility model can compact the loose powder on the film surface, preventing the powder from falling off and sticking when the film is stacked. The limiting ring can restrict the powder from being squeezed out to the edge of the film, ensuring that the powder distribution on the film surface is regular. In addition, the roller and the powder-spreading roller are parallel to each other, ensuring uniform pressing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one side of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the other side of the overall structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the connection structure between the connecting plate and the connecting shaft of this utility model;

[0030] Figure 4 This is a cross-sectional view of the connection between the powder-spreading roller and the storage bin of this utility model.

[0031] In the diagram: 1. Frame; 11. Powder spreading roller; 12. Powder storage tank; 13. Support; 14. Drive motor; 15. Storage bin; 16. Sealing gasket; 2. Mounting plate; 21. Rotating shaft; 22. Brush roller; 23. Collection box; 24. Fixing bolt; 25. Protective baffle; 3. Drive sprocket; 31. Driven sprocket; 32. Chain; 4. Connecting plate; 41. Connecting shaft; 42. Pressure roller; 43. Limiting ring; 44. Bolt; 45. Slide groove; 46. Slider; 47. Spring. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0037] Example 1:

[0038] like Figure 1-4 As shown, this utility model provides a powder-spreading device for uniformly spreading powder onto PVC calendered transparent film, comprising:

[0039] The powder spreading mechanism includes a frame 1, a powder spreading roller 11, a storage bin 15, and a drive assembly. The powder spreading roller 11 is rotatably connected to the inner side of the frame 1, and the drive assembly is installed at one end of the outer side of the frame 1 to drive the powder spreading roller 11 to rotate and spread powder. The outer periphery of the powder spreading roller 11 is provided with a plurality of powder storage grooves 12, and the storage bin 15 is connected to the frame 1 through a bracket 13.

[0040] A cleaning mechanism is located on one side of the frame 1. The cleaning mechanism includes two mounting plates 2 installed at one end of the connecting frame. A rotating shaft 21 is rotatably connected between the two mounting plates 2. A brush roller 22 is fixedly connected to the outer periphery of the rotating shaft 21. A transmission component is provided between one end of the rotating shaft 21 and one end of the powder spreading roller 11. The transmission component is used to realize the synchronous rotation of the brush roller 22 and the powder spreading roller 11, clean the residual powder on the outer periphery of the powder spreading roller 11, and improve the uniformity of powder spreading on the film surface.

[0041] During operation, the powder storage tank 12 on the outer periphery of the powder-spreading roller 11 enables quantitative powder delivery, avoiding the powder-spreading deviation on the film surface caused by unstable delivery volume in traditional powder-spreading. The brush roller 22 of the cleaning mechanism rotates synchronously with the powder-spreading roller 11 under the drive of the transmission component, which can clean the residual powder on the surface of the powder-spreading roller 11 in real time, prevent residue accumulation and agglomeration, and improve the quality of the film product. At the same time, the transmission component ensures that the speed of the powder-spreading roller 11 and the brush roller 22 are matched, avoiding cleaning omissions or excessive friction, and improving the stability of the device.

[0042] The transmission assembly includes a driven sprocket 31 mounted on a rotating shaft 21 and a driving sprocket 3 mounted on one end of a brush roller 22, with a chain 32 meshing between the driving sprocket 3 and the driven sprocket 31.

[0043] The sprocket and chain 32 meshing transmission has the characteristics of precise transmission ratio and non-slippage, which can strictly ensure that the brush roller 22 and the powder spreading roller 11 operate synchronously, ensuring that the residue in each area of ​​the powder spreading roller 11 can be evenly removed, avoiding local clumping, and continuously ensuring uniform powder spreading on the film surface.

[0044] The driving component is a drive motor 14. The driving end of the drive motor 14 is connected to the center of one end of the powder spreading roller 11. The drive motor 14 directly drives the powder spreading roller 11 to rotate, providing stable and controllable power to the powder spreading roller 11.

[0045] A collection box 23 is provided on the frame 1 below the brush roller 22. A fixing bolt 24 passes through the end of the collection box 23 away from the frame 1, and the fixing bolt 24 is threadedly connected to the surface of the frame 1.

[0046] The collection box 23 can accurately collect the residual powder cleaned by the brush roller 22, preventing the powder from scattering and being wasted. This powder can be reused, directly reducing raw material loss. The fixing bolt 24 achieves a detachable connection between the collection box 23 and the frame 1 through threaded connection. When the powder in the box accumulates to a certain amount, there is no need to disassemble the entire device. Just remove the fixing bolt 24 to take it out, empty it, and reinstall it. The operation is simple and reduces maintenance time.

[0047] A protective baffle 25 is fixedly connected to the top outer periphery of the collection box 23.

[0048] When cleaning residues with the brush roller 22, powder may splash. The protective baffle 25 can block the splashed powder, allowing more residues to fall into the collection box 23, reducing powder loss due to splashing, further improving the recycling rate and reducing waste.

[0049] A connecting plate 4 is fixedly connected to one end of the frame 1 away from the collection box 23. A connecting shaft 41 is provided between the two connecting plates 4. A pressure roller 42 is fixedly connected to the outer periphery of the connecting shaft 41. Limiting rings 43 are sleeved on both sides of the outer periphery of the pressure roller 42. The pressure roller 42 is made of soft silicone material, and the axis of the pressure roller 42 is parallel to the axis of the powder-spreading roller 11.

[0050] By setting the limiting ring 43, on the one hand, the lateral displacement of the PVC film during conveying can be limited to prevent the film from running off-center and avoid misalignment between the powder storage tank 12 of the powder spreading roller 11 and the film surface due to the positional deviation of the film, thereby preventing local powder missing or excessive powder spreading and ensuring accurate powder reception in each area of ​​the film surface. On the other hand, it can limit the powder from being squeezed out to the edge of the film surface, further optimizing the powder spreading uniformity, ensuring consistent anti-sticking effect in each area of ​​the film surface, and improving the overall quality of the product. Moreover, the silicone pressure roller 42 is soft and wear-resistant and will not scratch the surface of the PVC transparent film.

[0051] Each of the two connecting plates 4 has a groove 45 at one of its opposite ends. A slider 46 is slidably connected in each of the two grooves 45. The connecting shaft 41 is rotatably connected between the two sliders 46. A spring 47 is fixedly connected between the bottom of the inner cavity of each of the two grooves 45 and the two sliders 46, respectively.

[0052] When the film surface is raised, the pressure roller 42 drives the slider 46 to move upward along the groove 45, and the spring 47 is compressed. When the film surface is concave, the spring 47 rebounds and pushes the slider 46 downward, and the pressure roller 42 moves downward synchronously. This ensures that the pressure roller 42 always lightly touches the powder layer on the film surface, avoiding local inadequate compaction or excessive damage to the film due to film surface undulations. Moreover, this adaptive adjustment capability makes the compaction effect of the pressure roller 42 more uniform, further ensuring the stability of the film surface after powdering and avoiding powder loss and waste due to uneven compaction.

[0053] Both of the limiting rings 43 have bolts 44 passing through their tops, and one end of the bolts 44 rubs against the surface of the pressure roller 42.

[0054] By abutting one end of bolt 44 against the surface of pressure roller 42, the limiting ring 43 can be firmly fixed to the outer circumference of pressure roller 42. This prevents the limiting ring 43 from shifting due to equipment vibration and film friction during production, thereby preventing film deviation and powder misalignment. This ensures long-term stable limiting effect and continuous uniform powder distribution. Furthermore, the limiting ring 43 can be slid to adjust its position by loosening bolt 44, without the need to replace the limiting ring 43 or pressure roller 42. It can quickly adapt to limiting requirements according to different widths of film, making operation convenient and further improving the device's adaptability to different specifications of film, reducing changeover adjustment time.

[0055] The storage bin 15 has openings at both the top and bottom. The bottom of the storage bin 15 is arc-shaped and is attached to the top of the powder spreading roller 11. A sealing gasket 16 is fixedly connected to the bottom of the storage bin 15. The sealing gasket 16 is made of rubber.

[0056] The arc-shaped bottom of the storage bin 15 can perfectly fit the outer periphery of the powder spreading roller 11, allowing the powder in the storage bin 15 to flow more smoothly into the powder storage trough 12 of the powder spreading roller 11, avoiding the accumulation of powder in the bottom corner of the storage bin 15. At the same time, the sealing gasket 16 can fill the gap between the storage bin 15 and the powder spreading roller 11, preventing powder from leaking out of the gap and causing waste, ensuring that the powder in the storage bin 15 enters the powder storage trough 12 as much as possible, and improving the powder utilization rate.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A powder-spreading device for uniformly spreading powder onto PVC calendered transparent film, characterized in that, include: The powder spreading mechanism includes a frame (1), a powder spreading roller (11), a storage bin (15), and a drive assembly. The powder spreading roller (11) is rotatably connected to the inner side of the frame (1). The drive assembly is installed at one end of the outer side of the frame (1) to drive the powder spreading roller (11) to rotate and spread powder. The outer periphery of the powder spreading roller (11) is provided with several powder storage grooves (12). The storage bin (15) is connected to the frame (1) through a bracket (13). The cleaning mechanism is located on one side of the frame (1). The cleaning mechanism includes two mounting plates (2) installed at one end of the connecting frame. A rotating shaft (21) is rotatably connected between the two mounting plates (2). A brush roller (22) is fixedly connected to the outer periphery of the rotating shaft (21). A transmission component is provided between one end of the rotating shaft (21) and one end of the powder-spreading roller (11). The transmission component is used to realize the synchronous rotation of the brush roller (22) and the powder-spreading roller (11) to clean the residual powder on the outer periphery of the powder-spreading roller (11) and improve the uniformity of powder spreading on the film surface.

2. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 1, characterized in that, The transmission assembly includes a driven sprocket (31) mounted on a rotating shaft (21) and a driving sprocket (3) mounted on one end of a brush roller (22), with a chain (32) meshing between the driving sprocket (3) and the driven sprocket (31).

3. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 1, characterized in that, The driving component is a drive motor (14), and the driving end of the drive motor (14) is connected to the center of one end of the powder-spreading roller (11).

4. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 1, characterized in that, A collection box (23) is provided on the frame (1) below the brush roller (22). A fixing bolt (24) passes through the end of the collection box (23) away from the frame (1), and the fixing bolt (24) is threadedly connected to the surface of the frame (1).

5. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 4, characterized in that, A protective baffle (25) is fixedly connected to the top outer periphery of the collection box (23).

6. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 4, characterized in that, A connecting plate (4) is fixedly connected to one end of the frame (1) away from the collection box (23). A connecting shaft (41) is provided between the two connecting plates (4). A pressure roller (42) is fixedly connected to the outer periphery of the connecting shaft (41). Limiting rings (43) are sleeved on both sides of the outer periphery of the pressure roller (42).

7. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 6, characterized in that, Each of the two connecting plates (4) has a groove (45) at one end, and a slider (46) is slidably connected in each of the two grooves (45). The connecting shaft (41) is rotatably connected between the two sliders (46). A spring (47) is fixedly connected between the bottom of the inner cavity of each of the two grooves (45) and the two sliders (46).

8. The powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 6, characterized in that, Both of the limiting rings (43) have bolts (44) passing through their tops, and one end of the bolts (44) rubs against the surface of the pressure roller (42).

9. A powder-spreading device for uniformly spreading powder onto PVC calendered transparent film according to claim 6, characterized in that, The storage bin (15) is open at both the top and bottom. The bottom of the storage bin (15) is arc-shaped and is attached to the top of the powder spreading roller (11). A sealing gasket (16) is fixedly connected to the bottom of the storage bin (15).

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