A twin roll extrusion coating base roll structure
By adjusting the upper and lower bottom rollers of the double-roller structure, the problem of coating amount control was solved, achieving uniform coating of penetrating materials and improving the coating yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN HUASHENG NEW ENERGY EQUIPMENT CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-05
AI Technical Summary
Existing coating methods make it difficult to effectively control the coating amount, resulting in excessive coating material penetrating and adhering to the bottom roller, and insufficient coating material causing blank defects, especially in permeable materials such as RO membranes, where the yield is low.
The system employs a dual-roller structure, including an upper bottom roller and a lower bottom roller. By adjusting their height and position, the base fabric is suspended in mid-air, and coating is carried out in conjunction with the extrusion die, ensuring precise control of coating parameters.
It improves the coating yield, is suitable for permeable materials such as RO membranes, avoids uneven coating problems, and enhances the accuracy and stability of coating.
Smart Images
Figure CN224321715U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coating machine technology, specifically to a double-roller extrusion coating bottom roller structure. Background Technology
[0002] The original coating method used a 325mm diameter chrome-plated roller as the bottom guide roller. The base fabric was leveled around the roller, and the extrusion die was aligned with the center of the chrome-plated roller to evenly coat the product surface with the coating. This method was suitable for coating non-permeable materials such as PET without any problems. However, RO membranes are permeable, and it is very difficult to control the coating amount using the original extrusion coating method. When too much coating material is produced, it tends to penetrate and adhere to the bottom roller, while when too little coating material is produced, blank defects appear, resulting in a very low yield. Therefore, the current coating equipment needs to be improved. Utility Model Content
[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a double-roller extrusion coating bottom roller structure. By improving the bottom roller structure in the traditional coating machine, it adopts an advanced double-roller structure to achieve the coating of the base fabric by suspending it above the extrusion die head for coating processing, thus preventing the permeated coating material from adhering to the bottom roller structure.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] It includes two mechanical wall panels and an extrusion die head, wherein the mechanical wall panels are arranged symmetrically from left to right, and the extrusion die head is positioned between the two mechanical wall panels. An extrusion die lip is fixedly provided at the rear end of the extrusion die head. It also includes:
[0006] The fixing plates are two in number and arranged symmetrically on the left and right sides, and the two fixing plates are respectively fixed on the walls of the left and right mechanical wall panels facing each other.
[0007] The upper bottom roller is disposed between the left and right fixed plates and is located above the rear side of the extrusion die.
[0008] The bottom roller is disposed between the left and right fixed plates and is located below the rear side of the extrusion die.
[0009] The upper and lower sliding rails are two in number and are respectively fixedly mounted on the left and right fixed plates. The upper bottom roller is configured to cooperate with the upper and lower sliding rails.
[0010] The front and rear sliding rails are two in number and are respectively set on the left and right upper and lower sliding rails. The bottom roller is configured to cooperate with the front and rear sliding rails.
[0011] Preferably, both the upper and lower end plates of the upper and lower sliding slide rail are fixedly provided with upper and lower sliding bearing seats, and upper and lower sliding screws are screwed through the upper and lower sliding bearing seats. Two upper and lower sliding seats are slidably arranged inside the upper and lower sliding slide rail, and the two upper and lower sliding screws are respectively screwed into the two upper and lower sliding seats. An upper and lower adjusting handwheel is fixedly provided on the end of the upper and lower sliding screws that extends out of the upper and lower sliding slide rail.
[0012] Preferably, the upper and lower sliding slide rails are arranged at equal intervals from top to bottom on the front and rear side plates and are threaded together with upper and lower positioning bolts. The upper and lower sliding seats are arranged between the upper and lower positioning bolts on the front and rear sides. An upper roller fixing seat is fixedly arranged on the upper upper and lower sliding seats. The left and right end shafts of the upper bottom roller are respectively inserted into the left and right upper roller fixing seats. The front and rear sliding slide rails are fixedly arranged on the lower upper and lower sliding seats.
[0013] Preferably, a front and rear sliding bearing seat is fixedly provided on the front end plate of the front and rear sliding slide rail, and a front and rear sliding screw is screwed through the front and rear sliding bearing seat via bearings. A front and rear sliding seat is slidably provided inside the front and rear sliding slide rail, and the front and rear sliding screw is screwed into the front and rear sliding seat via threads. A front and rear adjusting handwheel is fixedly provided at the front end of the front and rear sliding screw.
[0014] Preferably, several front and rear positioning bolts are threaded through the front and rear end plates of the front and rear sliding slide rails. The front and rear sliding seats are arranged between the front and rear positioning bolts on the front and rear sides. The lower roller fixing seats are fixedly arranged on the front and rear sliding seats. The left and right end shafts of the lower bottom roller are respectively inserted into the lower roller fixing seats on the left and right sides.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This solution replaces the traditional single smooth roller structure with a structure of two smooth rollers. The upper and lower bottom rollers lift and support the base fabric against the extruder lip, enabling coating processing suitable for permeation membrane base fabrics. Furthermore, by adjusting the vertical height of the upper and lower bottom rollers and the front-to-back position of the lower bottom roller according to different coating parameters, the coating process can be adapted. Therefore, when coating permeation membranes, precise control of coating parameter settings is not required, greatly improving the coating yield. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure 2 yes Figure 1 Left rear side view.
[0019] Figure 3This is a schematic diagram of the structure of the extrusion die, upper bottom roller, and lower bottom roller in this utility model.
[0020] Figure 4 This is a schematic diagram of the structure of the upper roller fixing seat and the lower roller fixing seat in this utility model.
[0021] Figure 5 yes Figure 4 Left rear side view.
[0022] Figure 6 yes Figure 4 The right front side view.
[0023] Explanation of reference numerals in the attached figures:
[0024] Mechanical wall panel 1, extrusion die head 2, extrusion die lip 3, fixing plate 4, upper and lower sliding slide rails 5, upper and lower sliding bearing seats 6, upper and lower sliding seats 7, upper and lower sliding screws 8, upper and lower adjusting handwheels 9, upper and lower positioning bolts 10, upper roller fixing seat 11, upper bottom roller 12, front and rear sliding slide rails 13, front and rear sliding bearing seats 14, front and rear sliding seats 15, front and rear sliding screws 16, front and rear adjusting handwheels 17, front and rear positioning bolts 18, lower roller fixing seat 19, lower bottom roller 20. Detailed Implementation
[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] like Figure 1-6 As shown, the specific implementation adopts the following technical solution:
[0027] This specific embodiment includes a mechanical wall panel 1, an extrusion die head 2, an upper bottom roller 12, and a lower bottom roller 20. There are two mechanical wall panels 1 arranged symmetrically from left to right. A fixing plate 4 is fixedly installed on the wall of each mechanical wall panel 1 facing opposite sides. An extrusion die head 2 is positioned between the two mechanical wall panels 1, with its left and right ends fixedly installed on the left and right mechanical wall panels 1 respectively. An extrusion die lip 3 is fixedly installed on the extrusion die head 2, and the extrusion die lip 3 is positioned to the rear. Up and down sliding rails 5 are fixedly installed on both the left and right fixing plates 4. Two up and down sliding seats 7 are slidably installed within the up and down sliding rails 5. Up and down sliding bearing seats 6 are fixedly installed on the upper and lower end plates of the up and down sliding rails 5. A sliding screw 8 is threaded through a bearing into the sliding bearing housing 6, and the sliding screw 8 is movably threaded through the end plate of the upper and lower sliding rail 5. The two sliding screws 8 are respectively threaded into the upper and lower sliding seats 7 on the upper and lower sides. An upper and lower adjusting handwheel 9 is fixedly installed on the end of the sliding screw 8 extending out of the upper and lower sliding rail 5. Front and rear positioning bolts 18 are threaded through the front and rear side plates of the upper and lower sliding rail 5. The upper and lower sliding seats 7 are positioned between the front and rear positioning bolts 18 on the front and rear sides. The position of the upper and lower sliding seats 7 within the upper and lower sliding rail 5 is adjusted by the sliding screws 8. After adjusting the position of the upper and lower sliding seats 7, the upper and lower positioning bolts 10 are tightened. The upper and lower sliding seats 7 are pressed against each other to achieve positioning and locking of the upper and lower sliding seats 7; an upper roller fixing seat 11 is fixedly installed on the upper upper and lower sliding seats 7, and the left and right ends of the upper bottom roller 12 are inserted into the upper roller fixing seats 11 on the left and right sides. The upper bottom roller 12 is mounted on the upper rear side of the extrusion die head 2; a front and rear sliding slide rail 13 is fixedly installed on the lower upper and lower sliding seats 7, and a front and rear sliding seat 15 is slidably installed in the front and rear sliding slide rail 13. A front and rear sliding bearing seat 14 is fixedly installed on the front and rear sliding bearing seat 13, and a front and rear sliding screw 16 is screwed through the front and rear sliding bearing seat 14 through the bearing. The front and rear sliding screw 16 is movably inserted through the front and rear sliding slide rail 13. The threaded connection is inserted into the front and rear sliding seats 15. The front and rear sliding screws 16 are fixedly provided with front and rear adjustment handwheels 17. The front and rear end plates of the front and rear sliding rails 13 are threadedly connected with front and rear positioning bolts 18. The front and rear sliding seats 15 are located between the front and rear positioning bolts 18 on the front and rear sides. The front and rear position of the front and rear sliding seats 15 in the front and rear sliding rails 13 is adjusted by the front and rear sliding screws 16. After the adjustment is completed, the front and rear positioning bolts 18 on the front and rear sides are rotated and pressed against the front and rear sliding seats 15 to achieve positioning and locking of the front and rear sliding seats 15. The lower bottom rollers 20 are fixedly provided on the front and rear sliding seats 15, and the left and right end shafts of the lower bottom rollers 20 are respectively inserted into the lower roller fixing seats 19 on the left and right sides.
[0028] When using this device, the upper and lower sliding screws 8 are rotated by the upper and lower adjustment handwheel 9, thereby pushing the upper and lower sliding seats 7 to slide within the upper and lower sliding rails 5. This causes the upper sliding seat 7 to adjust the height of the upper bottom roller 12, and vice versa. Adjusting the height of the upper and lower bottom rollers 12 and 20 allows for adjustment of the height distance between them. The front and rear adjustment handwheel 17 rotates the front and rear sliding screws 16, thus... The front and rear sliding screws 16 push the front and rear moving seats to slide within the front and rear moving slide rails, thereby driving the front and rear sliding bases to adjust the front and rear positions of the lower bottom roller 20; the coating base cloth is wrapped around the upper bottom roller 12 and the lower bottom roller 20, so that the base cloth is suspended between the upper bottom roller 12 and the lower bottom roller 20. According to the coating process data, the width of the suspended section of the base cloth is selected and adjusted so that the coating can be completely solidified on the suspended section of the base cloth during the coating process. The front and rear positions of the lower bottom roller 20 are adjusted so that the suspended section of the base cloth is pushed to fit against the extrusion die lip 3.
[0029] Compared with the prior art, the beneficial effects of this utility model are:
[0030] 1. This device is equipped with an upper bottom roller 12 and a lower bottom roller 20 to support the coating base fabric, thereby achieving the support of the base fabric at the extrusion die lip 3, so that the base fabric with penetrating characteristics can be coated during coating.
[0031] 2. This device is equipped with an upper bottom roller 12 that can be adjusted up and down, and a lower bottom roller 20 that can be adjusted up and down and back and forth, so as to adjust the width of the base fabric of the overhead section and adjust the lip 3 of the base fabric of the overhead section to fit the extrusion die.
[0032] 3. This device is equipped with an upper and lower sliding slide rail 5 and two sets of upper and lower moving seats inside it. The upper bottom roller 12 is installed on the upper upper and lower sliding seats 7 through the upper roller fixing seat 11 to realize the upper and lower position adjustment of the upper bottom roller 12. A front and rear fixed slide rail is set on the lower upper and lower moving seats and a front and rear sliding seat 15 is set. The lower bottom roller 20 is installed on the front and rear sliding seats 15 through the lower roller fixing seat 19, thereby realizing the upper and lower movement adjustment and the front and rear movement adjustment of the lower bottom roller 20.
[0033] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A twin-roll extrusion coating bottom roller structure, comprising mechanical wall plates (1) and an extrusion die (2), wherein there are two mechanical wall plates (1) arranged symmetrically from left to right, the extrusion die (2) is disposed between the two mechanical wall plates (1), and an extrusion die lip (3) is fixedly provided at the rear end of the extrusion die (2); characterized in that, It also includes: Fixing plate (4), there are two fixing plates (4) arranged symmetrically on the left and right, and the two fixing plates (4) are respectively fixed on the walls facing each other on the left and right mechanical wall panels (1); The upper bottom roller (12) is located between the two fixed plates (4) on the left and right sides, and the upper bottom roller (12) is located above the rear side of the extrusion die (2); The bottom roller (20) is located between the left and right fixed plates (4) and is located below the rear side of the extrusion die (2). The upper and lower sliding rails (5) are two in number and are respectively fixed on the left and right fixed plates (4). The upper bottom roller (12) is configured to cooperate with the upper and lower sliding rails (5). The front and rear sliding rails (13) are two in number and are respectively set on the left and right upper and lower sliding rails (5). The bottom roller (20) is set in cooperation with the front and rear sliding rails (13).
2. The twin-roll extrusion coating bottom roller structure according to claim 1, characterized in that: The upper and lower sliding slide rail (5) is fixedly provided with upper and lower sliding bearing seats (6) on both the upper and lower end plates. The upper and lower sliding bearing seats (6) are screwed through the bearings and the upper and lower sliding screws (8) are screwed through the upper and lower sliding slide rail (5). Two upper and lower sliding seats (7) are slidably provided inside the upper and lower sliding slide rail (5). The two upper and lower sliding screws (8) are respectively screwed into the two upper and lower sliding seats (7) by thread. The upper and lower adjusting handwheel (9) is fixedly provided on the end of the upper and lower sliding screw (8) that extends out of the upper and lower sliding slide rail (5).
3. The twin-roll extrusion coating bottom roller structure according to claim 2, characterized in that: The upper and lower sliding slide rails (5) are arranged at equal intervals from top to bottom on the front and rear side plates and are threadedly connected with upper and lower positioning bolts (10). The upper and lower sliding seats (7) are set between the upper and lower positioning bolts (10) on the front and rear sides. The upper roller fixing seat (11) is fixedly set on the upper upper and lower sliding seats (7). The left and right ends of the upper bottom roller (12) are respectively inserted into the left and right upper roller fixing seats (11). The front and rear sliding slide rails (13) are fixedly set on the lower upper and lower sliding seats (7).
4. The twin-roller extrusion coating bottom roller structure according to claim 1, characterized in that: The front end plate of the front and rear sliding slide rail (13) is fixedly provided with a front and rear sliding bearing seat (14). A front and rear sliding screw (16) is screwed through the bearing on the front and rear sliding bearing seat (14). A front and rear sliding seat (15) is slidably provided inside the front and rear sliding slide rail (13). The front and rear sliding screw (16) is screwed into the front and rear sliding seat (15). A front and rear adjusting handwheel (17) is fixedly provided at the front end of the front and rear sliding screw (16).
5. The twin-roller extrusion coating bottom roller structure according to claim 4, characterized in that: The front and rear sliding slide rails (13) have several front and rear positioning bolts (18) threaded through the front and rear end plates. The front and rear sliding seats (15) are located between the front and rear positioning bolts (18) on the front and rear sides. The lower roller fixing seats (19) are fixedly installed on the front and rear sliding seats (15). The left and right end shafts of the bottom roller (20) are respectively inserted into the lower roller fixing seats (19) on the left and right sides.