Calendering equipment for PVC (polyvinyl chloride) sheets

Abstract

The utility model relates to the technical field of calendaring, and discloses a PVC sheet calendaring device which comprises an upper roller and a lower roller, the two ends of the lower roller are rotationally connected with telescopic assemblies used for adjusting the thickness of a PVC sheet, one side of the lower roller is provided with an adjusting assembly used for adjusting the width of the PVC sheet, the adjusting assembly is fixedly connected with the inner side of a base, and the base is provided with a plurality of rolling wheels. The adjusting assembly comprises a shell, a left adjusting plate, a right adjusting plate, a limiting support, a left rotating shaft and a right rotating shaft, the shell is fixedly connected to the inner side of the base, the left adjusting plate and the right adjusting plate are arranged at the top of the shell, and one end of the left adjusting plate and one end of the right adjusting plate are slidably connected with the limiting support; one end of the left adjusting plate and one end of the right adjusting plate are connected with a lower rolling wheel in a sliding mode, so that the PVC sheet rolling equipment is provided, and the problems that due to the fact that pressure is reduced in edge areas on the two sides of a roller, the edge of a PVC material can be thicker or thinner than that in a center area, the edge width cannot be controlled, and cutting needs to be conducted, and resource waste is caused are solved.

Description

Technical Field

[0001] This utility model relates to the field of calendering technology, and more specifically, to a calendering device for PVC sheets. Background Technology

[0002] PVC (polyvinyl chloride) sheets are a widely used plastic material in building materials, packaging, printing, medical, and other fields. Calendering equipment plays a crucial role in their production process. Calendering equipment mixes PVC resin with other additives and then applies high temperature and pressure to the PVC material, causing it to be squeezed and stretched between continuous rollers to form sheets of a certain thickness and width. During the calendering process, the pressure distribution between the rollers presents the following problems: pressure is reduced at the edges of the rollers, which may result in the PVC material being thicker or thinner at the edges than in the center, and the inability to control the edge width necessitates trimming, leading to resource waste.

[0003] In view of this, we propose a calendering device for PVC sheets. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a calendering device for PVC sheets. In this device, the pressure is reduced in the edge areas on both sides of the roller, which may result in the PVC material being thicker or thinner at the edges than in the center, and the inability to control the edge width, leading to the need for trimming and wasting resources.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a calendering device for PVC sheet, comprising: an upper roller and a lower roller, wherein the two ends of the lower roller are rotatably connected to a telescopic component for adjusting the thickness of the PVC sheet, and one side of the lower roller is provided with an adjusting component for adjusting the width of the PVC sheet, the adjusting component being fixedly connected to the inner side of the base, the adjusting component comprising a housing, a left adjusting plate, a right adjusting plate, a limiting bracket, a left rotating shaft, and a right rotating shaft, the housing being fixedly connected to the inner side of the base, the top of the housing being provided with a left adjusting plate and a right adjusting plate, one end of the left adjusting plate and the right adjusting plate being slidably connected to the limiting bracket, and one end of the left adjusting plate and the right adjusting plate being slidably connected to the lower roller.

[0006] Preferably, the housing is provided with a rotating shaft bracket, one end of the left rotating shaft passes through the right adjusting plate and the left adjusting plate, and is rotatably connected to the rotating shaft bracket, and the left adjusting plate is engaged with the left rotating shaft.

[0007] Preferably, one end of the right rotating shaft passes through the right adjusting plate and is rotatably connected to the rotating shaft bracket, and the right adjusting plate is engaged with the right rotating shaft.

[0008] Preferably, the telescopic component includes a fixed bracket, an upper sliding block is provided inside the fixed bracket, a lower sliding block is provided below the upper sliding block, and a spring is provided above the upper sliding block, with one end of the spring tightly pressing against the inner wall of the fixed bracket.

[0009] Preferably, an adjusting rod is rotatably connected below the lower sliding block, and a second spring is provided on the outside of the adjusting rod. One end of the adjusting rod passes through the fixed bracket and the second spring and is rotatably connected to the lower sliding block.

[0010] Preferably, a connecting groove is provided on one side of the base for replacing the right and left adjusting plates in the adjusting assembly, and the connecting groove is fixedly connected to the outer shell.

[0011] According to the above plan,

[0012] The advantages compared to existing technologies are as follows:

[0013] This utility model uses a telescopic assembly that is rotatably connected to both ends of the lower roller. An adjustment assembly is provided on one side of the lower roller. The adjustment assembly consists of a housing, a left adjustment plate, a right adjustment plate, a limit bracket, a left rotation shaft, and a right rotation shaft. It works in conjunction with the fixed bracket, an upper sliding block, a lower sliding block, a spring, and an adjustment rod in the telescopic assembly to achieve precise width control and reduce resource waste, while also facilitating subsequent equipment maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall component structure of this utility model;

[0015] Figure 2 This is an exploded view of the adjustment component of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the telescopic component of this utility model;

[0017] Figure 4 This is a schematic diagram of the side structure of the base of this utility model;

[0018] In the diagram: 1. Upper roller; 2. Lower roller; 3. Telescopic assembly; 4. Adjustment assembly; 5. Base; 301. Fixed bracket; 302. Upper sliding block; 303. Lower sliding block; 304. Spring; 305. Adjusting rod; 306. Second spring; 401. Housing; 402. Left adjusting plate; 403. Right adjusting plate; 404. Limiting bracket; 405. Left rotating shaft; 406. Right rotating shaft; 407. Rotating shaft bracket; 501. Connecting groove. Detailed Implementation

[0019] The utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only descriptive and are not limiting of the scope of protection of this utility model.

[0020] Example

[0021] like Figures 1-4 As shown: A calendering device for PVC sheets includes an upper roller 1 and a lower roller 2 as core components, which work together to ensure the calendering effect and quality of the sheet. In particular, the design and function of the lower roller 2 plays a crucial role in adjusting the thickness and width of the sheet.

[0022] The two ends of the lower roller 2 are connected to the telescopic assembly 3 via a rotatable connection. This design of the telescopic assembly 3 allows the lower roller 2 to move precisely in the vertical direction, thereby enabling fine adjustment of the PVC sheet thickness. When producing sheets of different thicknesses, the operator can adjust the telescopic assembly 3 to change the gap between the lower roller 2 and the upper roller 1 to adapt to different production needs.

[0023] On one side of the lower roller 2, the equipment is equipped with an adjustment component 4 for adjusting the width of the PVC sheet. This adjustment component 4 is securely fixed to the inside of the base 5 to ensure its stability and reliability during operation.

[0024] The adjustment assembly 4 has a complex and sophisticated structure, consisting of multiple components, including a housing 401, a left adjustment plate 402, a right adjustment plate 403, a limiting bracket 404, a left rotation shaft 405, and a right rotation shaft 406. The housing 401 serves as the supporting structure for the entire assembly and is firmly fixed to the inside of the base 5.

[0025] At the top of the housing 401, a left adjusting plate 402 and a right adjusting plate 403 are precisely mounted. These two adjusting plates can move relative to each other in the horizontal direction, thereby adjusting the width of the PVC sheet. One end of the left adjusting plate 402 and the right adjusting plate 403 is connected to the limiting bracket 404 by a sliding connection, which ensures their stability and guidance during movement.

[0026] The other ends of the left adjusting plate 402 and the right adjusting plate 403 are also connected to the lower roller 2 via a sliding connection. This connection allows the lower roller 2 to be finely adjusted in the left and right directions to adapt to the production needs of sheets of different widths. When it is necessary to adjust the sheet width, the operator can move the left adjusting plate 402 and the right adjusting plate 403 to change the contact area between the lower roller 2 and the PVC sheet, thereby achieving precise width control.

[0027] It can be understood that in the adjustment assembly 4, the outer shell 401 serves as the external protective structure and support for the entire assembly, bearing all the internal precision components. In order to ensure that the left adjustment plate 402 and the right adjustment plate 403 can move stably and smoothly in the horizontal direction to achieve precise adjustment of the width of the PVC sheet, a rotating shaft bracket 407 is specially provided inside the outer shell 401.

[0028] The rotating shaft bracket 407 serves as the support point for the left rotating shaft 405 and the right rotating shaft 406, ensuring the stability and accuracy of the two rotating shafts during rotation. The left rotating shaft 405, as a key transmission component, passes through the right adjusting plate 403 and the left adjusting plate 402 at one end, forming a rotatable connection with the rotating shaft bracket 407. This connection not only ensures smooth rotation of the left rotating shaft 405 but also, through its design passing through the two adjusting plates, enables coordinated control of these two plates.

[0029] The left adjusting plate 402 engages with the left rotating shaft 405 to achieve a specific transmission function.

[0030] It is understandable that the telescopic component 3 is mainly composed of a fixed bracket 301, which is the foundation and support structure of the entire component. Inside the fixed bracket 301, there is an upper sliding block 302 and a lower sliding block 303. The upper sliding block 302 is located above the lower sliding block 303, and both can slide vertically inside the fixed bracket 301.

[0031] Of particular note is the presence of a spring 304 above the upper sliding block 302. This spring 304 plays a crucial role in the telescopic assembly 3. One end of it is tightly pressed against the inner wall of the fixed bracket 301, while the other end is connected to the upper sliding block 302. When the height of the lower roller 2 needs to be adjusted, the spring 304 absorbs or releases energy through its elastic deformation, thereby pushing the lower roller 2 to move precisely vertically.

[0032] This design not only ensures that the PVC sheet maintains a constant thickness during calendering, but also allows for flexible adjustments to meet different production needs. Furthermore, the telescopic component 3 has a simple and compact structure, is easy to maintain, and greatly improves the overall performance and reliability of the equipment.

[0033] It is understandable that the adjusting rod 305 is the key component in the telescopic assembly 3 for achieving vertical adjustment. Its outer side is wrapped with a second spring 306, which provides the necessary elastic support and restoring force for the adjusting rod 305. When the height of the lower roller 2 needs to be adjusted, the adjusting rod 305 will extend or retract under the action of the second spring 306, thereby causing the lower sliding block 303 and the upper sliding block 302 to slide vertically within the fixed bracket 301.

[0034] One end of the adjusting rod 305 passes through the fixed bracket 301 and the second spring 306, and finally forms a rotatable connection with the lower sliding block 303. This design ensures the stability and accuracy of the adjusting rod 305 during the extension and retraction process, while also allowing the lower sliding block 303 to move vertically accordingly as the adjusting rod 305 rotates.

[0035] Through this precise construction and linkage mechanism, the telescopic component 3 achieves accurate control over the height of the lower roller 2, thereby ensuring the thickness consistency of the PVC sheet during the calendering process. This not only improves product quality and production efficiency but also provides a more flexible and reliable production solution for the modern plastics processing industry. At the same time, the structural design of the telescopic component 3 fully considers ease of maintenance and operation, making the entire calendering equipment operate more stably and efficiently.

[0036] Understandably, a connecting slot 501 is provided on one side of the base 5. The main function of this connecting slot 501 is to facilitate the replacement of the right adjusting plate 403 and the left adjusting plate 402 in the adjusting assembly 4. During long-term use or when maintenance is required, the operator can easily remove or install the right adjusting plate 403 and the left adjusting plate 402 through this connecting slot 501, thereby greatly improving the maintainability of the equipment.

[0037] The connecting groove 501 and the housing 401 are fixedly connected. This connection method ensures that the housing 401 can be firmly installed on the base 5, thereby guaranteeing the stability and accuracy of the entire adjustment assembly 4. At the same time, this design also makes the connection between the housing 401 and the base 5 tighter, effectively preventing loosening or displacement caused by vibration or external force.

[0038] The working process of this utility model is as follows: the adjustment assembly consists of a shell, a left adjustment plate, a right adjustment plate, a limiting bracket, a left rotation shaft, and a right rotation shaft. The shell is fixed inside the base, providing stable support. The left and right adjustment plates are mounted on the top of the shell and can slide horizontally to adjust the width of the sheet.

[0039] The left and right rotating shafts are the power source for the adjusting plates. They pass through the left and right adjusting plates respectively and are rotatably connected to the rotating shaft bracket. When the operator rotates the left or right rotating shaft, the corresponding adjusting plate moves accordingly through the meshing connection, thereby changing the width of the sheet.

[0040] The telescopic assembly is the key component for enabling the vertical movement of the lower roller. It consists of a fixed bracket, an upper sliding block, a lower sliding block, a spring, and an adjusting rod. The upper and lower sliding blocks can slide vertically within the fixed bracket. The spring provides elastic support, allowing the upper sliding block to move up and down as the lower sliding block moves.

[0041] The adjusting rod is the power source for the telescopic assembly. It is rotatably connected to the lower sliding block and provides elastic restoring force through a second spring. When the height of the lower roller needs to be adjusted, the operator can rotate the adjusting rod, causing the lower and upper sliding blocks to slide up and down within the fixed bracket, thereby moving the lower roller to the desired position.

[0042] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A calendering device for PVC sheets, comprising: The upper roller (1) and the lower roller (2) are characterized in that the two ends of the lower roller (2) are rotatably connected to a telescopic component (3) for adjusting the thickness of the PVC sheet; one side of the lower roller (2) is provided with an adjustment component (4) for adjusting the width of the PVC sheet; the adjustment component (4) is fixedly connected to the inner side of the base (5); the adjustment component (4) comprises a shell (401), a left adjustment plate (402), a right adjustment plate (403), a limit bracket (404), a left rotation shaft (405) and a right rotation shaft (406); the shell (401) is fixedly connected to the inner side of the base (5); the top of the shell (401) is provided with a left adjustment plate (402) and a right adjustment plate (403); one end of the left adjustment plate (402) and the right adjustment plate (403) are slidably connected to the limit bracket (404); one end of the left adjustment plate (402) and the right adjustment plate (403) are slidably connected to the lower roller (2).

2. A calendering device for PVC sheets according to claim 1, characterized in that: A rotating shaft bracket (407) is provided inside the housing (401), one end of the left rotating shaft (405) passes through the right adjustment plate (403) and the left adjustment plate (402), and is rotatably connected to the rotating shaft bracket (407), and the left adjustment plate (402) is meshedly connected to the left rotating shaft (405).

3. A calendering device for PVC sheets according to claim 2, characterized in that: One end of the right rotating shaft (406) passes through the right adjusting plate (403) and is rotatably connected to the rotating shaft bracket (407), and the right adjusting plate (403) is meshedly connected to the right rotating shaft (406).

4. A calendering device for PVC sheets according to claim 3, characterized in that: The telescopic assembly (3) comprises a fixed bracket (301), an upper sliding block (302) is arranged inside the fixed bracket (301), a lower sliding block (303) is arranged below the upper sliding block (302), and a spring (304) is arranged above the upper sliding block (302), and one end of the spring (304) is tightly pressed against the inner wall of the fixed bracket (301).

5. A calendering device for PVC sheets according to claim 4, characterized in that: An adjusting rod (305) is rotatably connected below the lower sliding block (303), a second spring (306) is provided on the outer side of the adjusting rod (305), and one end of the adjusting rod (305) passes through the fixed bracket (301) and the second spring (306) and is rotatably connected to the lower sliding block (303).

6. A calendering device for PVC sheets according to claim 5, characterized in that: A connection groove (501) for replacing the right adjustment plate (403) and the left adjustment plate (402) in the adjustment assembly (4) is provided on one side of the base (5), and the connection groove (501) is fixedly connected to the housing (401).

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