Two-roll sheet calender

Abstract

The utility model discloses a two roll sheet calender applied to sheet forming test equipment, including frame composition, bearing seat B composition, calender roll, bearing seat sliding plate composition, bearing seat A composition, the side plate front end of frame composition is provided bearing seat A mounting panel and bearing seat B mounting panel respectively, the top of side plate is provided cylinder, bearing seat B composition is fixed on bearing seat B mounting panel, lower calender roll is installed in bearing mounting hole B of bearing seat B composition and is connected speed reducer motor, bearing seat sliding plate composition is fixed on bearing seat A mounting panel, bearing seat sliding plate composition has the bearing seat sliding block of the displacement of upper, lower, bearing seat sliding block connects bearing seat A composition, upper calender roll is installed in bearing mounting hole A of bearing seat A composition and is connected speed reducer motor, and bearing seat A composition is connected cylinder through ball head connector, sets up screw rod subassembly between bearing seat B composition and bearing seat A composition lower, and calender roll inner chamber connects external circulating cooling water interface.

Description

Technical Field

[0001] This utility model relates to sheet forming test equipment, and in particular to a two-roll sheet calender. Background Technology

[0002] The raw materials for extruded sheets are mainly thermoplastics, including rigid and flexible polyvinyl chloride, polyethylene, polypropylene, polystyrene, ABS, polycarbonate, polyacrylic acid resins, etc., and can also be fillers, blended modified materials, foamed materials, etc. Extruded sheets can be used as structural and packaging materials. Some plastic sheets are used in the manufacture of chemical containers, electrical insulation materials, wall panels, partitions, and flooring in buildings or transportation vehicles and ships. Sheets are also raw materials for some thermoformed products. For example, extruded sheets are vacuum-formed into refrigerator liners and door liners. Sheets are raw materials for thermoformed packaging materials, and non-toxic transparent sheets are widely used in food and pharmaceutical packaging.

[0003] To test the mechanical and processing properties of plastic materials used in sheet production, a small extruder is used to melt the corresponding plastic material and extrude it through a sheet die before large-scale sheet production. Then, a sheet calender is used to calender the extruded molten plastic material into sheets of a certain thickness for testing the mechanical and processing properties of the plastic material. The sheet calender needs to cool the extruded sheet; the sheet production speed depends on the cooling capacity of the calender rollers. The sheet needs to achieve a cooling and shaping effect within an appropriate temperature range to ensure that the sheet achieves uniform thickness, flatness, and good appearance quality. Summary of the Invention

[0004] Purpose of the utility model: This utility model provides a two-roll sheet calender for use in sheet forming testing equipment, which is used to achieve cooling and shaping effect of sheet within an appropriate temperature range.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A two-roll sheet calender includes a frame assembly, a bearing housing B assembly, a calendering roller, a self-aligning roller bearing, a lead screw assembly, a ball joint connector, a cylinder, a bearing housing slide assembly, a bearing housing A assembly, a geared motor, and a rotary joint. The frame consists of two side plates, with mounting base plates at the bottom of the two side plates, bearing seat A mounting plate and bearing seat B mounting plate respectively at the front end of the two side plates, and two cylinders at the top of the two side plates. The bottom, consisting of two bearing seats B, is fixedly mounted on the bearing seat B mounting plate of the two side plates of the frame. The calendering roller below is mounted in the bearing mounting hole B of the two bearing seats B through a self-aligning roller bearing. The geared motor below is connected to the drive shaft of the calendering roller below. Two bearing seat slide plates are fixedly mounted on the bearing seat A mounting plates of the two side plates of the frame. The bearing seat slide plate has a slide groove and a bearing seat slider that can move up and down linearly in the slide groove. The top of the bearing seat slider is connected to the bottom of the two bearing seats A. The upper calendering roller is installed in the bearing mounting hole A of the two bearing seats A through a self-aligning roller bearing. The upper gear motor is connected to the drive shaft of the upper calendering roller. The upper part of the two bearing seats A is connected to two cylinders through a ball joint connector. A lead screw assembly is provided between bearing housing B and bearing housing A to adjust the distance between the upper and lower calendering rollers. Rotary joints are provided on both sides of the upper and lower calendering rollers, and the inner cavities of the upper and lower calendering rollers are connected to the inlet and outlet water interfaces of the external circulating cooling water through the rotary joints.

[0006] Furthermore, the top sides of the two side plates are respectively connected to the top plate bracket, and the top front ends of the two side plates are respectively connected to the top plate support iron. The top plate is fastened to the upper part of the top plate bracket and the top plate support iron by several screws. Cylinder mounting holes are respectively provided at the front ends of both sides of the top plate, and two cylinders are respectively fixedly installed at the cylinder mounting holes.

[0007] Furthermore, the bearing housing B comprises an upper half housing B and a lower half housing B, which are tightly connected by bolts through bolt mounting holes B and screw holes B. A bearing mounting hole B is formed between the upper half housing B and the lower half housing B, and the journals at both ends of the calendering roller below are fixedly installed in the bearing mounting hole B by two self-aligning roller bearings.

[0008] Furthermore, the two inner end caps are respectively fixedly installed on the inner side of the two bearing seats B, the outer end cap is fixedly installed on the outer side of the left bearing seat B, the geared motor mounting seat is fixedly installed on the outer side of the right bearing seat B, the flange end of the lower geared motor is installed on the side of the right bearing seat B through the geared motor mounting seat, and the hollow shaft of the geared motor is connected to the drive shaft of the lower calendering roller through a flat key.

[0009] Furthermore, the bearing housing slide plate assembly includes a bearing housing slide plate, bearing housing pressure strips, and a bearing housing slider. The bearing housing slide plate is fixedly mounted on the bearing housing A mounting plate of the two side plates of the frame assembly by screws through mounting bolt holes. The two bearing housing pressure strips are respectively fastened to both sides of the bearing housing slide plate by connecting screws. The bearing housing slide plate and the two bearing housing pressure strips form the slide groove of the bearing housing slider, and the bearing housing slider is set in the slide groove of the bearing housing slider formed by the bearing housing slide plate and the two bearing housing pressure strips.

[0010] Furthermore, the bearing housing A comprises an upper half A and a lower half A, which are tightly connected by bolts through bolt mounting holes A and screw holes A. A bearing mounting hole A is formed between the upper half A and the lower half A. The journals at both ends of the upper calendering roller are fixedly installed in the bearing mounting hole A by two self-aligning roller bearings.

[0011] Furthermore, the two inner end caps are respectively fixedly installed on the inner side of the two bearing seats A, the outer end cap is fixedly installed on the outer side of the left bearing seat A, the geared motor mounting seat is fixedly installed on the outer side of the right bearing seat A, the flange end of the upper geared motor is installed on the side of the right bearing seat A through the geared motor mounting seat, and the hollow shaft of the geared motor is connected to the drive shaft of the upper calendering roller through a flat key.

[0012] Furthermore, the ball joint connector includes a ball joint fixing plate, a ball joint pressure plate, and a cylinder push rod. The ball joint fixing plate is fixedly installed above the bearing seat A assembly. The ball joint pressure plate is connected to the ball joint fixing plate. A spherical inner cavity is formed between the ball joint pressure plate and the ball joint fixing plate. The spherical inner cavity is connected to the spherical head of the cylinder push rod, and the cylinder push rod is connected to the piston rod of the cylinder.

[0013] Furthermore, the lead screw assembly includes a lead screw sleeve and a positioning lead screw. The lead screw sleeve is fixedly installed above the bearing housing B assembly, and the positioning lead screw is connected to the screw hole of the lead screw sleeve. The head of the positioning lead screw rests on the bottom of the bearing housing A assembly.

[0014] Beneficial effects: This two-roll sheet calender, with its advantages of miniaturization, ease of operation, energy saving and low noise, is used in sheet forming test equipment to achieve cooling and shaping effects on sheets within an appropriate temperature range, so that the sheets achieve the process conditions of uniform thickness, flatness and good appearance quality. It can accurately test the mechanical properties and processing performance of plastic materials used for sheets. Attached Figure Description

[0015] Figure 1 This is a front view of a two-roll sheet calender.

[0016] Figure 2 This is a side view of a two-roll sheet calender.

[0017] Figure 3 This is a top view of a two-roll sheet calender.

[0018] Figure 4 The frame forms the main view.

[0019] Figure 5 The frame is composed of a side view.

[0020] Figure 6 The top view is composed of the frame.

[0021] Figure 7 for Figure 4 View from AA.

[0022] Figure 8 The main view is composed of bearing housing B.

[0023] Figure 9 This is a side view of bearing housing B.

[0024] Figure 10 The top view of bearing housing B is shown.

[0025] Figure 11 The main view is composed of bearing housing A.

[0026] Figure 12 The side view of bearing housing A is shown.

[0027] Figure 13 The top view of bearing housing A is shown.

[0028] Figure 14 for Figure 11 View from direction B in the middle.

[0029] Figure 15 This is a side view of the bearing housing slide plate assembly.

[0030] Figure 16 The front view shows the bearing housing slide assembly.

[0031] Figure 17 for Figure 15 View from C.

[0032] Figure 18 for Figure 16 DD view.

[0033] Figure 19 for Figure 16 EE-oriented view.

[0034] Figure 20 for Figure 17 FF view.

[0035] In the diagram: 1- Frame assembly; 2- Bearing housing B assembly; 3- Calendering roller; 4- Outer end cover; 5- Self-aligning roller bearing; 6- Inner end cover; 7- Lead screw sleeve; 8- Positioning lead screw; 9- Ball head fixing plate; 10- Ball head pressure plate; 11- Cylinder; 12- Cylinder push rod; 13- Bearing housing slide plate assembly; 14- Bearing housing A assembly; 15- Gear motor mounting base; 16- Gear motor; 17- Rotary joint; 18- Top plate bracket; 19- Bearing housing A mounting plate; 20- Bearing housing B mounting plate; 21- Side plate; 22- Mounting base plate; 23- Top plate; 24- Top plate support; 25- Cylinder mounting hole; 26- Lower half of seat B; 27- Upper half of seat B; 28- Bearing mounting hole B; 29- Bolt mounting hole B; 30- Screw hole B; 31- Lower half A; 32- Upper half A; 33- Bearing mounting hole A; 34- Bolt mounting hole A; 35- Screw hole A; 36- Bearing housing pressure bar; 37- Bearing housing slider; 38- Bearing housing slide plate; 39- Connecting screw; 40- Connecting bolt hole; 41- Locating pin hole; 42- Mounting bolt hole. Detailed Implementation

[0036] The present invention will be further explained below with reference to the accompanying drawings.

[0037] like Figures 1 to 3 As shown, the present invention provides a two-roll sheet calender, comprising a frame assembly 1, a bearing housing B assembly 2, a calendering roller 3, a self-aligning roller bearing 5, a lead screw sleeve 7, a positioning lead screw 8, a ball joint connector, a cylinder 11, a bearing housing slide assembly 13, a bearing housing A assembly 14, a geared motor 16, and a rotary joint 17.

[0038] like Figures 4 to 7 As shown, frame component 1 includes two side plates 21, with a mounting base plate 22 at the bottom of each side plate 21. The mounting base plate 22 of frame component 1 can fix the two-roll sheet calender in the corresponding position in the sheet forming test equipment. Bearing seat A mounting plate 19 and bearing seat B mounting plate 20 are respectively installed at the front ends of the two side plates 21, and two cylinders 11 are installed at the top of the two side plates 21. The top sides of the two side plates 21 are respectively connected to the top plate bracket 18, and the top front ends of the two side plates 21 are respectively connected to the top plate support iron 24. The top plate 23 is fastened to the upper part of the top plate bracket 18 and the top plate support iron 24 by several screws to enhance the stability of frame component 1. Cylinder mounting holes 25 are respectively provided at the front ends of both sides of the top plate 23, and the two cylinders 11 are respectively fixedly installed at the cylinder mounting holes 25.

[0039] like Figures 8 to 10As shown, the bottoms of the two bearing seats B assembly 2 are respectively fixedly mounted on the bearing seat B mounting plates 20 of the two side plates 21 of the frame assembly 1 by screws. The lower calendering roller 3 is mounted in the bearing mounting holes B28 of the two bearing seats B assembly 2 through the self-aligning roller bearing 5. The lower geared motor 16 is connected to the drive shaft of the lower calendering roller 3. The geared motor 16 drives the lower calendering roller 3 to rotate through the drive shaft of the lower calendering roller 3.

[0040] The bearing housing B component 2 includes an upper half B27 and a lower half B26. The upper half B27 and the lower half B26 are tightly connected by bolts through bolt mounting holes B29 and screw holes B30. A bearing mounting hole B28 is formed between the upper half B27 and the lower half B26. The journals at both ends of the lower calendering roller 3 are fixedly installed in the bearing mounting hole B28 by two self-aligning roller bearings 5. The two self-aligning roller bearings 5 ​​respectively bear the radial force of the lower calendering roller 3. Two inner end caps 6 are fixedly installed on the inner sides of the bearing housings B assemblies 2 on both sides to seal the lubricating grease at the self-aligning roller bearings 5; the outer end cap 4 is fixedly installed on the outer side of the left bearing housing B assemblies 2 to position the self-aligning roller bearings 5 ​​in the bearing mounting holes B28 of the left bearing housing B assemblies 2 and to seal the lubricating grease at the self-aligning roller bearings 5; the geared motor mounting seat 15 is fixedly installed on the outer side of the right bearing housing B assemblies 2 to position the self-aligning roller bearings 5 ​​in the bearing mounting holes B28 of the right bearing housing B assemblies 2 and to seal the lubricating grease at the self-aligning roller bearings 5, as well as to connect the flange end of the lower geared motor 16. The flange end of the lower geared motor 16 is mounted on the side of the right bearing housing B assemblies 2 through the geared motor mounting seat 15. The hollow shaft of the geared motor 16 is connected to the drive shaft of the lower calendering roller 3 through a flat key.

[0041] like Figures 11 to 20 As shown, two bearing seat slide plates 13 are fixedly mounted on the bearing seat A mounting plates 19 of the two side plates 21 of the frame assembly 1. The bearing seat slide plate 13 has a sliding groove and a bearing seat slider 37 that can move linearly up and down in the sliding groove. The top of the bearing seat slider 37 is connected to the bottom of the two bearing seat A assemblies 14 by screws and positioning pins through connecting bolt holes 40 and positioning pin holes 41. The upper calendering roller 3 is mounted in the bearing mounting holes A33 of the two bearing seat A assemblies 14 through self-aligning roller bearings 5. The upper geared motor 16 is connected to the drive shaft of the upper calendering roller 3. The geared motor 16 drives the upper calendering roller 3 to rotate through the drive shaft of the upper calendering roller 3. The upper part of the two bearing seat A assemblies 14 is connected to two cylinders 11 through ball joint connectors.

[0042] The bearing housing slide plate assembly 13 includes a bearing housing slide plate 38, a bearing housing pressure strip 36, and a bearing housing slider 37. The bearing housing slide plate 38 is fixedly installed on the bearing housing A mounting plate 19 of the two side plates 21 of the frame assembly 1 by screws through the mounting bolt holes 42. The two bearing housing pressure strips 36 are respectively fastened to the two sides of the bearing housing slide plate 38 by connecting screws 39. The bearing housing slide plate 38 and the two bearing housing pressure strips 36 form the groove of the bearing housing slider 37. The bearing housing slider 37 is set in the groove of the bearing housing slider 37 formed by the bearing housing slide plate 38 and the two bearing housing pressure strips 36.

[0043] The bearing housing A component 14 includes an upper half A32 and a lower half A31. The upper half A32 and the lower half A31 are tightly connected by bolts through bolt mounting holes A34 and screw holes A35. A bearing mounting hole A33 is formed between the upper half A32 and the lower half A31. The journals at both ends of the upper calendering roller 3 are fixedly installed in the bearing mounting hole A33 by two self-aligning roller bearings 5. The two self-aligning roller bearings 5 ​​respectively bear the radial force of the upper calendering roller 3. Two inner end caps 6 are fixedly installed on the inner sides of the bearing housing A assembly 14 on both sides to seal the lubricating grease at the self-aligning roller bearing 5; the outer end cap 4 is fixedly installed on the outer side of the left bearing housing A assembly 14 to position the self-aligning roller bearing 5 in the bearing mounting hole A33 of the left bearing housing A assembly 14 and to seal the lubricating grease at the self-aligning roller bearing 5; the geared motor mounting seat 15 is fixedly installed on the outer side of the right bearing housing A assembly 14 to position the self-aligning roller bearing 5 in the bearing mounting hole A34 of the right bearing housing A assembly 14 and to seal the lubricating grease at the self-aligning roller bearing 5, as well as to connect the flange end of the upper geared motor 16. The flange end of the upper geared motor 16 is mounted on the side of the right bearing housing A assembly 14 through the geared motor mounting seat 15. The hollow shaft of the geared motor 16 is connected to the drive shaft of the upper calendering roller 3 through a flat key.

[0044] The ball joint connector includes a ball joint fixing plate 9, a ball joint pressure plate 10, and a cylinder push rod 12. The ball joint fixing plate 9 is fixedly installed above the lower half A31 of the bearing housing A assembly 14. The ball joint pressure plate 10 is connected to the ball joint fixing plate 9. A spherical inner cavity is formed between the ball joint pressure plate 10 and the ball joint fixing plate 9. The spherical inner cavity is connected to the spherical head of the cylinder push rod 12. The cylinder push rod 12 is connected to the piston rod of the cylinder 11 through a screw hole and a nut. The two cylinders 11 are driven by compressed air and drive the upper calendering roller 3 and the bearing housing slider 37 respectively through the cylinder push rod 12. The upper calendering roller 3 and the bearing housing slider 37 perform vertical linear displacement under the limit of the sliding groove of the bearing housing slider 37.

[0045] A lead screw assembly is installed between bearing housing B assembly 2 and bearing housing A assembly 14 to adjust the gap between the upper and lower calendering rollers 3. The lead screw assembly includes a lead screw sleeve 7 and a positioning lead screw 8. The lead screw sleeve 7 is fixedly installed above the lower half B26 of bearing housing B assembly 2. The positioning lead screw 8 is connected to the screw hole of the lead screw sleeve 7 by a nut and screw. The head of the positioning lead screw 8 rests below the lower half A31 of bearing housing A assembly 14. Adjusting the positioning lead screw 8 according to the required thickness of the calendered sheet allows adjustment of the gap between the upper and lower calendering rollers 3 during the calendering process.

[0046] Rotary joints 17 are respectively provided on both sides of the upper calendering roller 3 and the lower calendering roller 3. The inner cavities of the upper calendering roller 3 and the lower calendering roller 3 are connected to the inlet and outlet water interfaces of the external circulating cooling water through the rotary joints 17. The external circulating cooling water cools the upper calendering roller 3 and the lower calendering roller 3 through the inner cavities of the upper calendering roller 3 and the lower calendering roller 3. When the extruded molten plastic material passes between the upper calendering roller 3 and the lower calendering roller 3, the external circulating cooling water in the inner cavities of the upper calendering roller 3 and the lower calendering roller 3 cools and shapes the sheet during the calendering process of the two-roll sheet calendering machine.

[0047] The functions of a two-roll sheet calender are as follows: Before the small extruder extrudes molten plastic material through the sheet die, the positioning screw 8 is adjusted according to the required thickness of the calendered sheet to adjust the gap between the upper and lower calendering rollers 3 during the calendering process. The rotary joint 17 connects to external circulating cooling water, which cools the corresponding calendering rollers 3 through the inner cavities of the upper and lower calendering rollers 3. After the sheet die extrudes the molten plastic material, the cylinder 11, driven by compressed air, moves the upper calendering roller 3 upwards via the air rod 12, causing the extruded molten plastic material to pass through the upper and lower calendering rollers 3. Between the calendering rollers 3, two geared motors 16 drive the lower calendering roller 3 and the upper calendering roller 3 to rotate in opposite directions at the same speed. The cylinder 11 is driven by compressed air and pushes the upper calendering roller 3 downward through the air rod 12. The head of the positioning screw 8 contacts the lower half of the bearing seat A assembly 14 A31, maintaining the required gap between the upper and lower calendering rollers 3 for the required sheet thickness. The two calendering rollers 3 calender and cool and shape the extruded molten plastic material. In the extrusion molding of the sheet, the two-roll sheet calender achieves the effect of uniform thickness, flatness and good appearance quality of the sheet.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A two-roll sheet calender, characterized in that: It includes a frame assembly (1), a bearing housing B assembly (2), a calendering roller (3), a self-aligning roller bearing (5), a lead screw assembly, a ball connector, a cylinder (11), a bearing housing slide assembly (13), a bearing housing A assembly (14), a geared motor (16), and a rotary joint (17). The frame consists of two side plates (21), with a mounting base plate (22) at the bottom of the two side plates (21), a bearing seat A mounting plate (19) and a bearing seat B mounting plate (20) respectively at the front end of the two side plates (21), and two cylinders (11) at the top of the two side plates (21). The bottom of the two bearing seats B (2) is fixedly installed on the bearing seat B mounting plate (20) of the two side plates (21) of the frame assembly (1). The lower calendering roller (3) is installed in the bearing mounting hole B (28) of the two bearing seats B (2) through the self-aligning roller bearing (5). The lower gear motor (16) is connected to the drive shaft of the lower calendering roller (3). Two bearing seat slide plates (13) are fixedly installed on the bearing seat A mounting plate (19) of the two side plates (21) of the frame assembly (1). The bearing seat slide plate (13) has a groove and a bearing seat slider (37) that can move up and down linearly in the groove. The top of the bearing seat slider (37) is connected to the bottom of the two bearing seat A assemblies (14). The upper calendering roller (3) is installed in the bearing mounting hole A (33) of the two bearing seat A assemblies (14) through a self-aligning roller bearing (5). The upper gear motor (16) is connected to the drive shaft of the upper calendering roller (3). The upper part of the two bearing seat A assemblies (14) is connected to two cylinders (11) through a ball joint connector. A screw assembly is provided between bearing housing B assembly (2) and bearing housing A assembly (14) to adjust the distance between the upper calendering roller (3) and the lower calendering roller (3); Rotary joints (17) are provided on both sides of the upper calendering roller (3) and the lower calendering roller (3). The inner cavities of the upper calendering roller (3) and the lower calendering roller (3) are connected to the inlet and outlet water interfaces of the external circulating cooling water through the rotary joints (17).

2. The two-roll sheet calender according to claim 1, characterized in that: The top sides of the two side plates (21) are respectively connected to the top plate bracket (18), and the top front ends of the two side plates (21) are respectively connected to the top plate support iron (24). The top plate (23) is fastened to the top plate bracket (18) and the top plate support iron (24) by several screws. Cylinder mounting holes (25) are respectively provided at the front ends of both sides of the top plate (23), and two cylinders (11) are respectively fixedly installed at the cylinder mounting holes (25).

3. A two-roll sheet calender according to claim 1, characterized in that: The bearing housing B (2) comprises an upper half B (27) and a lower half B (26). The upper half B (27) and the lower half B (26) are tightly connected by bolts through bolt mounting holes B (29) and screw holes B (30). A bearing mounting hole B (28) is formed between the upper half B (27) and the lower half B (26). The journals at both ends of the calendering roller (3) below are fixedly installed in the bearing mounting hole B (28) by two self-aligning roller bearings (5).

4. A two-roll sheet calender according to claim 3, characterized in that: Two inner end caps (6) are fixedly installed on the inner side of the two bearing housing B components (2) respectively. The outer end cap (4) is fixedly installed on the outer side of the left bearing housing B component (2). The geared motor mounting seat (15) is fixedly installed on the outer side of the right bearing housing B component (2). The flange end of the lower geared motor (16) is installed on the side of the right bearing housing B component (2) through the geared motor mounting seat (15). The hollow shaft of the geared motor (16) is connected to the drive shaft of the lower calendering roller (3) through a flat key.

5. A two-roll sheet calender according to claim 1, characterized in that: The bearing housing slide plate assembly (13) includes a bearing housing slide plate (38) and a bearing housing pressure strip (36). The bearing housing slide plate (38) is fixedly installed on the bearing housing A mounting plate (19) of the two side plates (21) of the frame assembly (1) by screws through mounting bolt holes (42). The two bearing housing pressure strips (36) are respectively fastened to the two sides of the bearing housing slide plate (38) by connecting screws (39). The bearing housing slide plate (38) and the two bearing housing pressure strips (36) form a groove for the bearing housing slider (37). The bearing housing slider (37) is set in the groove of the bearing housing slider (37) formed by the bearing housing slide plate (38) and the two bearing housing pressure strips (36).

6. A two-roll sheet calender according to claim 1, characterized in that: The bearing housing A (14) comprises an upper half A (32) and a lower half A (31). The upper half A (32) and the lower half A (31) are tightly connected by bolts through bolt mounting holes A (34) and screw holes A (35). A bearing mounting hole A (33) is formed between the upper half A (32) and the lower half A (31). The journals at both ends of the upper calendering roller (3) are fixedly installed in the bearing mounting hole A (33) by two self-aligning roller bearings (5).

7. A two-roll sheet calender according to claim 6, characterized in that: Two inner end caps (6) are fixedly installed on the inner side of the two bearing housing A components (14) respectively. The outer end cap (4) is fixedly installed on the outer side of the left bearing housing A component (14). The geared motor mounting seat (15) is fixedly installed on the outer side of the right bearing housing A component (14). The flange end of the upper geared motor (16) is installed on the side of the right bearing housing A component (14) through the geared motor mounting seat (15). The hollow shaft of the geared motor (16) is connected to the drive shaft of the upper calendering roller (3) through a flat key.

8. A two-roll sheet calender according to claim 1, characterized in that: The ball joint connector includes a ball joint fixing plate (9), a ball joint pressure plate (10), and a cylinder push rod (12). The ball joint fixing plate (9) is fixedly installed above the bearing seat A assembly (14). The ball joint pressure plate (10) is connected to the ball joint fixing plate (9). A spherical inner cavity is formed between the ball joint pressure plate (10) and the ball joint fixing plate (9). The spherical inner cavity is connected to the spherical head of the cylinder push rod (12). The cylinder push rod (12) is connected to the piston rod of the cylinder (11).

9. A two-roll sheet calender according to claim 1, characterized in that: The lead screw assembly includes a lead screw sleeve (7) and a positioning lead screw (8). The lead screw sleeve (7) is fixedly installed above the bearing seat B assembly (2). The positioning lead screw (8) is connected to the screw hole of the lead screw sleeve (7). The head of the positioning lead screw (8) is positioned below the bearing seat A assembly (14).

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