Two-section calendering production line of double-extruder composite rubber plate

Abstract

The utility model provides a two-section calendaring production line of a double-extruder composite rubber plate. The two-section calendaring production line comprises a gridding cloth tensioning device, a double-layer extrusion device, a first calendaring guide roller set, a second calendaring guide roller set, a cooling device and a rolling support which are sequentially arranged; the gridding cloth tensioning device comprises a gridding cloth support and a plurality of gridding cloth guide rollers which are arranged in a staggered mode, gridding cloth is wound on the gridding cloth support, and the gridding cloth enters the first calendering guide roller set after passing through the gridding cloth guide rollers; the double-layer extrusion device comprises an upper extruder and a lower extruder, and an upper-layer rubber plate, a lower-layer rubber plate and gridding cloth converge and enter a first calendering guide roller group; and the first calendering guide roller group and the second calendering guide roller group are respectively used for first-section calendering and second-section calendering. According to the utility model, the efficient and tight combination of the gridding cloth and the two layers of rubber plates is realized through a two-section calendering composite process, and the production efficiency and the alignment accuracy are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber plate composites, in particular to a two-stage calendering production line for composite rubber plates using double extruders. Background Art

[0002] Among rubber sheet products for laminating machines, multi-layer composite rubber sheets are favored by customers due to their excellent strength, wear resistance, greater resistance to aging and deformation, and longer service life. Common multi-layer composite rubber sheets are cloth-stacked rubber sheets, with the upper and lower layers being rubber sheets and the middle layer being mesh cloth. The process flow is as follows: prefabricate upper and lower semi-finished rubber sheets - sandwich mesh cloth between the upper and lower semi-finished rubber sheets - vulcanize the multi-layer structure - and obtain the cloth-stacked rubber sheet. On the cloth-stacked rubber sheet production line, the upper and lower rubber sheets need to be extruded separately. After that, the lower rubber sheet, mesh cloth, and upper rubber sheet are laid in sequence on the vulcanizer, and the multi-layer structure is vulcanized. The disadvantage is that the laying of the multi-layer structure relies on manual operation, which is inefficient and lacks alignment accuracy.

[0003] Therefore, there is a need to improve the existing technology. Utility Model Content

[0004] The utility model provides a two-stage calendering production line of a double-extruder composite rubber plate, which is used to solve the above problems.

[0005] The utility model adopts a technical solution: providing a two-stage calendering production line for a double-extruder composite rubber sheet, comprising a mesh cloth tensioning device, a double-layer extrusion device, a first calendering guide roller group, a second calendering guide roller group, a cooling device and a winding support which are arranged in sequence;

[0006] The mesh cloth tensioning device includes a mesh cloth support and a plurality of mesh cloth guide rollers arranged in a staggered manner. The mesh cloth is wound on the mesh cloth support. The mesh cloth passes through the staggered mesh cloth guide rollers and then enters the first calendering guide roller group.

[0007] The double-layer extrusion device includes an upper extruder and a lower extruder, the extrusion heads of the upper extruder and the lower extruder are arranged on the same vertical line, and are used to extrude the upper rubber sheet and the lower rubber sheet and make them easy to align. There is also a space for the mesh cloth to pass through between the extrusion heads of the upper extruder and the lower extruder, so that the three-layer structure is aligned;

[0008] The first calendering guide roller group includes a first calendering upper roller and a first calendering lower roller, which are used to calender and composite the upper layer of film, the mesh cloth and the lower layer of film into a primary composite rubber sheet;

[0009] The second calendering guide roller group includes a second calendering upper roller and a second calendering lower roller, which are used to calender and composite the once composite rubber sheet again to improve the density and uniformity of the product;

[0010] The cooling device is used to cool the composite rubber sheet after calendering to ensure the product is shaped;

[0011] The winding support is used for winding the cooled composite rubber sheet.

[0012] Furthermore, the rotation speed of the first calendering guide roller group is greater than the rotation speed of the mesh cloth support, so that the mesh cloth is kept in a tensioned state.

[0013] Furthermore, the rotation speed of the second calendering guide roller group is greater than the rotation speed of the first calendering guide roller group, the rotation speed of the winding bracket is greater than the rotation speed of the second calendering guide roller group, and the speed of the entire production line gradually increases from left to right, which plays a role of traction and stretching.

[0014] Furthermore, the first calendering upper roller and the second calendering upper roller can be adjusted up and down, and the calendering pressure can be adjusted by adjusting the roller spacing.

[0015] Furthermore, the width of the space between the extrusion heads of the upper extruder and the lower extruder is slightly greater than the width of the mesh cloth.

[0016] Furthermore, an upper rubber plate guide roller and a lower rubber plate guide roller are respectively provided at the outlet direction of the extrusion heads of the upper extruder and the lower extruder.

[0017] Furthermore, a mesh cloth guide roller is provided between the upper rubber plate guide roller and the lower rubber plate guide roller.

[0018] Furthermore, a plurality of buffer rollers are provided between the first calendering guide roller group and the second calendering guide roller group. The composite rubber sheet after the first calendering is cooled by the buffer rollers before entering the second calendering guide roller group, which helps to reduce the temperature, stabilize the shape, and provide better conditions for the second calendering.

[0019] The beneficial effects of the two-stage calendering production line of the double-extruder composite rubber sheet of the utility model are:

[0020] 1. Through the double-layer extrusion device and two-time calendering composite process, the mesh cloth and the two layers of rubber sheets are efficiently and tightly combined, eliminating the need for manual laying of the multi-layer structure, effectively improving production efficiency and alignment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a two-stage calendering production line for a composite rubber sheet with two extruders according to the first embodiment of the present utility model;

[0022] The components in the accompanying drawings are marked as follows: 1. Mesh cloth bracket, 2. Mesh cloth guide roller, 3. Upper extruder extrusion head, 4. Lower extruder extrusion head, 5. First calendering upper roller, 6. Second calendering upper roller, 7. Cooling device, 8. Winding bracket, 21. Mesh cloth guide roller, 31. Upper rubber sheet guide roller, 41. Lower rubber sheet guide roller, 51. Buffer roller, 71. Cooling conveyor roller. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] See also Figure 1 The first embodiment of the present invention provides a two-stage calendering production line for a double-extruder composite rubber sheet, comprising a mesh tensioning device, a double-layer extrusion device, a first calendering guide roller group, a second calendering guide roller group, a cooling device 7 and a winding support 8, which are arranged in sequence from left to right;

[0026] The mesh cloth tensioning device includes a mesh cloth support 1 and three mesh cloth guide rollers 2 arranged in a zigzag pattern. The mesh cloth is wound on the mesh cloth support 1. The mesh cloth passes through the staggered mesh cloth guide rollers 2 and then enters the first calendering guide roller group.

[0027] The double-layer extrusion device comprises an upper extruder and a lower extruder. The upper extruder is arranged by raising the frame. The extrusion heads (3, 4) of the upper extruder and the lower extruder are arranged on the same vertical line, and are used to extrude the upper rubber sheet and the lower rubber sheet and make them easy to align. There is also a space between the extrusion heads of the upper extruder and the lower extruder for the mesh cloth to pass through. The width of the space is slightly larger than the width of the mesh cloth.

[0028] The upper and lower extruders are provided with an upper rubber sheet guide roller 31 and a lower rubber sheet guide roller 41 at the outlet direction of the extrusion head, respectively. A mesh cloth guide roller 21 is also provided between the upper and lower rubber sheet guide rollers 31 and 41 to adjust the position of the three-layer structure before lamination, so that the transmission is smoother.

[0029] The first calendering guide roller group includes a first calendering upper roller 5 and a first calendering lower roller, which is used to calender and composite the upper layer of film, the mesh cloth and the lower layer of film into a primary composite rubber sheet;

[0030] Two buffer rollers 51 are set after the first calendering guide roller group. The composite rubber sheet after the first calendering is cooled by the buffer rollers 51 before entering the second calendering guide roller group. This helps to reduce the temperature, stabilize the shape, and provide better conditions for the second calendering.

[0031] The second calendering guide roller group includes a second calendering upper roller 6 and a second calendering lower roller, which are used to calender and composite the once composite rubber sheet again to improve the density and uniformity of the product;

[0032] The cooling device 7 includes three cooling conveying rollers 71 arranged in a zigzag pattern. After the composite rubber sheet is cooled and shaped by the cooling conveying rollers 71 , it is rolled up on the winding support 8 .

[0033] Specifically, the brackets and guide rollers in the entire production line are installed through the connecting frames on both sides. The connecting frames are usually arranged in sections to facilitate adjustment and maintenance of the structures of each section of the production line. In this embodiment, the connecting frame is divided into five sections, which are used to install the mesh cloth tensioning device, the rubber plate and mesh cloth guide roller 21, the calendering roller group and the buffer roller 51, the cooling device 7 and the winding bracket 8 respectively. The spacing between the connecting frames of each section can be adjusted according to actual needs.

[0034] Specifically, the mesh cloth support 1, the first calendering lower roller, the second calendering lower roller and the winding support 8 all have corresponding driving mechanisms for controlling the operating speed of each section of the production line.

[0035] In the production line, the continuity and stability of calendering will have a huge impact on the performance of the composite rubber sheet. Therefore, it is necessary to effectively control the running speed of each section and the calendering pressure:

[0036] The rotation speed of the first calendering guide roller group is greater than the rotation speed of the mesh cloth support 1, so that the mesh cloth is kept in a tensioned state;

[0037] The first calendering upper roller 5 can be adjusted up and down relative to the third section connecting frame to adjust the calendering pressure. The pressure is controlled at 1-3 kg to make the three-layer structure initially fit together.

[0038] The second calendering upper roller 6 can be adjusted up and down relative to its connecting frame to adjust the pressure of the second stage calendering and control the pressure at 2-4 kg. The roller spacing of the second stage calendering is set to be smaller than that of the first stage calendering, so that the pressure of the second stage calendering is greater than that of the first stage calendering, which facilitates the discharge of gas from the laminating surface and makes the three-layer structure tightly pressed to form a dense structure;

[0039] The speed of the second calendering guide roller group is greater than that of the first calendering guide roller group, and the speed of the winding bracket 8 is greater than that of the second calendering guide roller group. The speed of the entire production line gradually increases from left to right, which plays a role of traction and stretching.

[0040] Specifically, the first calendering guide roller group and the second calendering guide roller group are both provided with corresponding pressure gauges for monitoring the calendering pressure.

[0041] Specifically, the temperature of the second-stage calendering will be slightly lower than that of the first-stage calendering because the rubber sheet has been partially solidified at this time and a lower temperature is required to avoid overheating.

[0042] The two-stage calendering production line can also be used for calendering and laminating double-layer rubber sheets. The mesh cloth tensioning device does not participate in the production, and the composite rubber sheet is formed through two-stage calendering.

[0043] In other embodiments of the present invention, the rubber sheet material can still maintain good shape stability and performance at the temperature after the first calendering, so the buffer roller may not be set after the first calendering guide roller group, making the production line design more compact and improving production efficiency.

[0044] The beneficial effects of the two-stage calendering production line of the double-extruder composite rubber sheet of the utility model are:

[0045] 1. Through the double-layer extrusion device and two-time calendering composite process, the mesh cloth and the two layers of rubber sheets are efficiently and tightly combined, eliminating the need for manual laying of the multi-layer structure, effectively improving production efficiency and alignment accuracy;

[0046] 2. The speed setting of the first calendering guide roller group and the mesh cloth support ensures the stability of the mesh cloth during the calendering process, avoiding the problem of poor lamination caused by relaxation;

[0047] 3. The use of buffer rollers provides better conditions for secondary calendering.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A two-stage calendering production line for a double-extruder composite rubber sheet, characterized in that: It includes a mesh cloth tensioning device, a double-layer extrusion device, a first calendering guide roller group, a second calendering guide roller group, a cooling device and a winding support which are arranged in sequence; The mesh cloth tensioning device includes a mesh cloth support and a plurality of mesh cloth guide rollers arranged in a staggered manner. The mesh cloth is wound on the mesh cloth support. The mesh cloth passes through the staggered mesh cloth guide rollers and then enters the first calendering guide roller group. The double-layer extrusion device includes an upper extruder and a lower extruder, wherein the extrusion heads of the upper extruder and the lower extruder are arranged on the same vertical line, and are used to extrude the upper rubber sheet and the lower rubber sheet and make them easy to align. There is also a space between the extrusion heads of the upper extruder and the lower extruder for the mesh cloth to pass through; The first calendering guide roller group includes a first calendering upper roller and a first calendering lower roller, which are used to calender and composite the upper layer of film, the mesh cloth and the lower layer of film into a primary composite rubber sheet; The second calendering guide roller group includes a second calendering upper roller and a second calendering lower roller, which are used to calender and composite the once composite rubber sheet again; The cooling device is used to cool the composite rubber sheet after calendering; The winding support is used for winding the cooled composite rubber sheet.

2. A two-stage calendering production line for a double-extruder composite rubber sheet according to claim 1, characterized in that: The rotation speed of the first calendering guide roller group is greater than the rotation speed of the mesh cloth support.

3. A two-stage calendering production line for a double-extruder composite rubber sheet according to claim 2, characterized in that: The rotation speed of the second calendering guide roller group is greater than the rotation speed of the first calendering guide roller group, and the rotation speed of the winding support is greater than the rotation speed of the second calendering guide roller group.

4. A two-stage calendering production line for a double-extruder composite rubber sheet according to claim 3, characterized in that: The first calendering upper roller and the second calendering upper roller can be adjusted up and down, and the calendering pressure can be adjusted by adjusting the roller spacing.

5. The two-stage calendering production line of a double-extruder composite rubber sheet according to claim 4, characterized in that: The width of the space between the extrusion heads of the upper extruder and the lower extruder is slightly larger than the width of the mesh cloth.

6. A two-stage calendering production line for a double-extruder composite rubber sheet according to any one of claims 1 to 5, characterized in that: An upper rubber plate guide roller and a lower rubber plate guide roller are respectively provided at the outlet directions of the extrusion heads of the upper extruder and the lower extruder.

7. A two-stage calendering production line for a double-extruder composite rubber sheet according to claim 6, characterized in that: A mesh cloth guide roller is further provided between the upper rubber plate guide roller and the lower rubber plate guide roller.

8. A two-stage calendering production line for a double-extruder composite rubber sheet according to any one of claims 1 to 5, characterized in that: A plurality of buffer rollers are further provided between the first calendering guide roller group and the second calendering guide roller group. The composite rubber sheet after the first calendering is cooled by the buffer rollers before entering the second calendering guide roller group.

9. A two-stage calendering production line for a double-extruder composite rubber sheet according to claim 8, characterized in that: An upper rubber plate guide roller and a lower rubber plate guide roller are respectively provided at the outlet directions of the extrusion heads of the upper extruder and the lower extruder.

10. A two-stage calendering production line for a double-extruder composite rubber sheet according to claim 9, characterized in that: A mesh cloth guide roller is further provided between the upper rubber plate guide roller and the lower rubber plate guide roller.

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