Thickening type roller device for spunbond nonwoven fabric

Abstract

The utility model discloses a kind of thickening type spunbond nonwoven fabric roller device, including upper roller and the lower roller matched with the upper roller, the lower roller is rotatably mounted on lower roll shaft by dynamic seal, the lower roller inside is provided with oil cavity, the lower roll shaft is provided with oil return hole and multiple oil outlet holes, the oil outlet hole includes first oil outlet hole and second oil outlet hole, second oil outlet hole is arranged in the side of first oil outlet hole towards lower roll shaft end portion;Oil return hole is arranged in the side of second oil outlet hole towards lower roll shaft end portion.Through the multiple oil outlet holes distributed along lower roll shaft, oil cavity is supplied with hot oil, lower roller is heated;Improve the uniformity of hot oil supply, improve the heating uniformity of lower roller, alleviate or avoid the uneven heating condition of thickening type spunbond nonwoven fabric.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric production technology, specifically to a roller device for thickening spunbond nonwoven fabric. Background Technology

[0002] Nonwoven fabrics, as disposable products, are widely used in medical, packaging, construction, and daily life fields. Spunbond nonwoven fabric is a type of nonwoven material produced by extruding and stretching polymers to form continuous filaments, laying these filaments into a web, and then bonding it through self-adhesion, thermal bonding, chemical bonding, or mechanical reinforcement methods to create spunbond nonwoven fabric. Spunbond nonwoven fabrics exhibit superior tensile strength, elongation at break, and tear strength compared to dry-laid, wet-laid, and melt-blown nonwoven fabrics. They also offer good bidirectional strength, abrasion resistance, and a firm, pleasant feel. In certain non-disposable applications and building materials, spunbond nonwoven fabrics with greater thickness are required.

[0003] During the production of spunbond nonwoven fabrics, hot rolling is required under the binding rollers. Increasing the thickness leads to a decrease in heat transfer, and uneven heating is prone to occur during the hot rolling process, resulting in a decline in product performance, requiring more precise temperature control. CN 214572572U discloses a nonwoven fabric hot rolling mill, in which the binding rollers are installed and raised / lowered at both ends through a support structure, using ordinary hot rolling rollers, which suffers from uneven heating of the binding rollers. Utility Model Content

[0004] To address the aforementioned technical problems in the existing technology, this utility model provides a thickened spunbond nonwoven fabric rolling mill device that effectively controls the temperature of the rolling mill.

[0005] This utility model discloses a roller device for thickened spunbond nonwoven fabric, including an upper roller and a lower roller that cooperates with the upper roller. The lower roller is rotatably mounted on a lower roller shaft through a dynamic seal. An oil cavity is provided inside the lower roller. An oil return hole and multiple oil outlet holes are provided on the lower roller shaft. The oil outlet holes include a first oil outlet hole and a second oil outlet hole. The second oil outlet hole is located on the side of the first oil outlet hole facing the end of the lower roller shaft. The oil return hole is located on the side of the second oil outlet hole facing the end of the lower roller shaft.

[0006] Preferably, the oil output of the first oil outlet is greater than the oil output of the second oil outlet.

[0007] Preferably, the diameter of the first oil outlet is larger than the diameter of the second oil outlet.

[0008] Preferably, one end of the lower roller shaft is provided with an oil outlet port and at least one oil inlet port.

[0009] The oil outlet port is connected to the oil return port;

[0010] The oil inlet port is connected to either the first oil outlet or the second oil outlet.

[0011] Preferably, the present invention also includes a valve, a heater, a pump, and an oil tank.

[0012] The oil tank is connected in sequence to the pump, heater and valve, and the valve is connected to the first oil outlet and the second oil outlet through the corresponding oil inlet port;

[0013] The oil return hole is connected to the oil tank through the oil outlet port.

[0014] Preferably, the valve is a one-inlet, three-outlet solenoid valve.

[0015] Preferably, the present invention further includes a linear driver and a U-shaped bracket mounted on the output end of the linear driver.

[0016] The linear actuator is mounted on the underside of the frame;

[0017] The inner side of the frame is provided with a guide rail, and the second mounting plate on one side of the U-shaped frame cooperates with the guide rail;

[0018] The two sides of the lower roller are mounted on corresponding second mounting plates.

[0019] Preferably, the second mounting plate is provided with a first mounting groove, and the lower roller shaft is provided with a slot that mates with the side wall of the first mounting groove;

[0020] A detachable mounting buckle is provided on the upper side of the first mounting slot;

[0021] The upper roller shaft of the upper rolling roller is fixed on the guide rail by the first mounting plate;

[0022] The linear actuator is a hydraulic cylinder, a pneumatic cylinder, or a linear motor.

[0023] Preferably, a first driver is provided on the second mounting plate, and the first driver is connected to the lower roller through a first transmission mechanism;

[0024] The first transmission mechanism includes a third gear installed at the output end of the first driver and a second gear meshing with the third gear;

[0025] A first gear that meshes with the second gear is provided on one side of the lower roller shaft.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: hot oil is supplied to the oil chamber through multiple oil outlet holes distributed along the lower roller shaft to heat the lower roller; the uniformity of hot oil supply is improved, the uniformity of heating of the lower roller is improved, and the uneven heating of the thickened spunbond nonwoven fabric is reduced or avoided. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the working principle of the roller device for thickening spunbond nonwoven fabric of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of a roller device for thickening spunbond nonwoven fabrics;

[0029] Figure 3 This is a cross-sectional view of the lower roller;

[0030] Figure 4 This is a schematic diagram of the installation of the first transmission mechanism;

[0031] Figure 5 This is a working principle diagram of the upper and lower rollers in Example 5.

[0032] Markings in the diagram: 1. Frame; 12. Guide rail; 13. Sliding window; 2. Upper roller; 21. Upper roller shaft; 22. First mounting plate; 23. Third oil outlet; 24. Fourth oil outlet; 25. Upper oil return hole; 28. Upper oil chamber;

[0033] 3. Lower roller; 31. Lower roller shaft; 311. Slot; 32. First oil outlet; 33. Second oil outlet; 34. Oil return hole; 35. Oil inlet port; 36. Oil outlet port; 37. Dynamic seal; 38. Oil chamber; 39. First gear;

[0034] 4. Valve; 5. Heater; 6. Pump; 7. Oil tank; 8. First actuator; 81. First transmission mechanism; 82. Second gear; 83. Third gear; 9. Linear actuator; 91. U-shaped frame; 92. Second mounting plate; 93. First mounting groove; 94. Mounting buckle. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] Example 1. As... Figure 1As shown, the roller device for thickened spunbond nonwoven fabric includes an upper roller 2 and a lower roller 3 that cooperates with the upper roller 2. The lower roller 3 is rotatably mounted on a lower roller shaft 31 through a dynamic seal 37. An oil cavity 38 is provided inside the lower roller 3. The lower roller shaft 31 is provided with an oil return hole 34 and a plurality of oil outlet holes distributed along the lower roller shaft. The oil outlet holes include a first oil outlet hole 32 and a second oil outlet hole 33. The second oil outlet hole 33 is located on the side of the first oil outlet hole 32 facing the end of the lower roller shaft 31. The oil return hole 34 is located on the side of the second oil outlet hole 33 facing the end of the lower roller shaft 31.

[0038] Heating oil is supplied to the oil chamber through multiple oil outlets distributed along the lower roller shaft to heat the lower roller 3; this improves the uniformity of hot oil supply and the uniformity of heating of the lower roller 3, and reduces or avoids uneven heating of the thickened spunbond nonwoven fabric.

[0039] The upper binding roller 2 and the lower binding roller 3 are arranged longitudinally at intervals. The thickened spunbond nonwoven fabric is hot-bundled by the cooperation of the upper binding roller 2 and the lower binding roller 3.

[0040] Existing hot rolling rollers supply hot oil from one end to the other, resulting in a situation where the temperature at one end is higher than that at the other end. This embodiment can improve the uniformity of hot oil supply.

[0041] Example 2. The oil output of the first oil outlet 32 ​​is greater than that of the second oil outlet 33. That is, the oil output in the middle is greater than that on both sides. On the one hand, this can promote the flow of hot oil to both sides; on the other hand, it can appropriately increase the temperature in the middle, and through the thermal expansion effect, it can appropriately compensate for the deformation in the middle caused by the supports at both ends of the lower roller.

[0042] Example 3. Unlike Example 2, the oil supply to each oil outlet is controlled by valve 4. Valve 4 is connected to the first oil outlet 32 ​​and the second oil outlet 33 via corresponding oil inlet ports 35. Valve 4 is a one-inlet, three-outlet solenoid valve, which can control the hot oil supply to each oil outlet. Figure 1 The diagram shows valve 4, heater 5, pump 6, and oil tank 7. Oil tank 7 is connected sequentially to pump 6, heater 5, and valve 4. Oil return hole 34 returns oil to oil tank 7 through oil outlet port 36, achieving hot oil circulation. Heater 5, pump 6, and oil tank 7 are existing technologies and will not be described further in this invention.

[0043] Example 4. Unlike Example 3, the diameter of the first oil outlet 32 ​​is larger than the diameter of the second oil outlet 33. By designing the diameter of the oil outlet, the oil output of the middle oil outlet is increased.

[0044] Figure 2 and Figure 3The mounting structure of the lower roller 3 is shown. One end of the lower roller shaft 31 is provided with an oil outlet port 36 and at least one oil inlet port 35. The oil outlet port 36 is connected to the oil return hole 34. The oil inlet port 35 is connected to the first oil outlet hole 32 and / or the second oil outlet hole 33.

[0045] Figure 2 A linear actuator 9 and a U-shaped frame 91 mounted on the output end of the linear actuator 9 are shown. The linear actuator 9 is mounted on the lower side of the frame 1. A guide rail 12 is provided on the inner side of the frame 1. A second mounting plate 92 on one side of the U-shaped frame 91 cooperates with the guide rail 12 to improve the smoothness of the lower roller movement. The two sides of the lower roller shaft 31 are mounted on corresponding second mounting plates 92. It should be noted that one or more linear actuators 9 can be provided under the U-shaped frame 91. The linear actuator 9 is a hydraulic cylinder, a pneumatic cylinder, or a linear motor.

[0046] The second mounting plate 92 is provided with a first mounting groove 93, and the lower roller shaft 31 is provided with a slot 311 that mates with the side wall of the first mounting groove 93; a detachable mounting buckle 94 is provided on the upper side of the first mounting groove 93. The upper roller shaft 21 of the upper roller 2 is fixed on the guide rail 12 by the first mounting plate 22.

[0047] like Figure 4 The second mounting plate 92 is provided with a first driver 8, which is connected to the lower roller 3 through a first transmission mechanism 81. Specifically, the first transmission mechanism 81 includes a third gear 83 installed at the output end of the first driver 8 and a second gear 82 meshing with the third gear 83. A first gear 39 meshing with the second gear 82 is provided on one side of the lower roller shaft 31, but the transmission method is not limited to this. Figure 4 In the machine frame 1, a sliding window 13 is provided, and the first driver 8 is installed on the side near the sliding window 13 to avoid or reduce the influence of the heat from the lower roller 3 on the first driver 8. The first driver 8 can be a motor, such as a stepper motor.

[0048] This invention regulates and optimizes the supply of hot oil in the oil chamber 38 through multiple oil outlets on the lower roller shaft 31, improving the uniformity of oil supply and temperature of the lower roller 3, and achieving good temperature control of the lower roller. It also allows for temperature control of various parts of the lower roller 3 via valve 4. This prevents temperature differences between different parts from causing a decline in the performance of the nonwoven fabric, especially when the spunbond nonwoven fabric has a large thickness, thus preventing further expansion of the temperature difference within the nonwoven fabric.

[0049] Example 5. (As shown) Figure 5As shown, unlike Embodiment 1, the upper roller 2 can also be designed as the lower roller 3. The upper roller 2 is rotatably mounted on the upper roller shaft 21 through a set of dynamic seals. The upper roller 2 is provided with an upper oil chamber 28. The upper roller shaft 21 is also provided with a third oil outlet 23, a fourth oil outlet 24, and an upper oil return hole 25 that communicate with the upper oil chamber 28. The upper oil return hole 25 is connected to the input and output ends of the oil tank 7. The output end of the valve 4 is connected to the third oil outlet 23 and the fourth oil outlet 24. The oil output of the third oil outlet 23 is greater than that of the fourth oil outlet 24. The valve 4 can be a one-in-six-out solenoid valve; or two one-in-three-out solenoid valves connected in parallel can be used to control the oil supply of the upper roller and the lower roller respectively.

[0050] in addition Figure 1 and Figure 3 The diagram clearly shows only three oil outlets, but the number of oil outlets can be increased accordingly, simply by distributing them along the lower roller shaft. Furthermore, although this invention is designed and improved for thickened spunbond nonwoven fabrics, it is not limited to this and can also be applied to other types of nonwoven fabrics.

[0051] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A roller device for thickening spunbond nonwoven fabric, characterized in that, It includes an upper binding roller (2) and a lower binding roller (3) that cooperates with the upper binding roller (2). The lower roller (3) is rotatably mounted on the lower roller shaft (31) via a dynamic seal (37). The lower roller (3) has an oil cavity (38) on its inner side, and the lower roller shaft (31) has an oil return hole (34) and multiple oil outlet holes, including a first oil outlet hole (32) and a second oil outlet hole (33). The second oil outlet (33) is located on the side of the first oil outlet (32) facing the end of the lower roller (31); The oil return hole (34) is located on the side of the second oil outlet hole (33) facing the end of the lower roller shaft (31).

2. The roller device for thickening spunbond nonwoven fabric according to claim 1, characterized in that, The oil output of the first oil outlet (32) is greater than that of the second oil outlet (33).

3. The roller device for thickening spunbond nonwoven fabric according to claim 1, characterized in that, The diameter of the first oil outlet (32) is larger than the diameter of the second oil outlet (33).

4. The roller device for thickening spunbond nonwoven fabric according to claim 1, characterized in that, One end of the lower roller shaft (31) is provided with an oil outlet port (36) and at least one oil inlet port (35). The oil outlet port (36) is connected to the oil return hole (34); The oil inlet port (35) is connected to the first oil outlet port (32) or the second oil outlet port (33).

5. The roller device for thickening spunbond nonwoven fabric according to claim 4, characterized in that, It also includes valves (4), heaters (5), pumps (6), and oil tanks (7). The oil tank (7) is connected in sequence to the pump (6), the heater (5) and the valve (4), and the valve (4) is connected to the first oil outlet (32) and the second oil outlet (33) through the corresponding oil inlet port (35); The return oil hole (34) is connected to the oil tank (7) through the oil outlet port (36).

6. The roller device for thickening spunbond nonwoven fabric according to claim 5, characterized in that, The valve (4) is a solenoid valve with one inlet and three outlets.

7. The roller device for thickening spunbond nonwoven fabric according to any one of claims 1-6, characterized in that, It also includes a linear driver (9) and a U-shaped bracket (91) mounted on the output end of the linear driver (9). The linear actuator (9) is mounted on the underside of the frame (1); The inner side of the frame (1) is provided with a guide rail (12), and the second mounting plate (92) on one side of the U-shaped frame (91) cooperates with the guide rail (12); The lower roller (31) is mounted on the corresponding second mounting plate (92) on both sides.

8. The roller device for thickening spunbond nonwoven fabric according to claim 7, characterized in that, The second mounting plate (92) is provided with a first mounting groove (93), and the lower roller (31) is provided with a slot (311) that cooperates with the side wall of the first mounting groove (93); A detachable mounting buckle (94) is provided on the upper side of the first mounting groove (93); The upper roller shaft (21) of the upper roller (2) is fixed on the guide rail (12) by the first mounting plate (22); The linear actuator (9) includes a hydraulic cylinder, a pneumatic cylinder, or a linear motor.

9. The roller device for thickening spunbond nonwoven fabric according to claim 8, characterized in that, The second mounting plate (92) is provided with a first driver (8), which is connected to the lower roller (3) through a first transmission mechanism (81); The first transmission mechanism (81) includes a third gear (83) mounted on the output end of the first driver (8) and a second gear (82) meshing with the third gear (83); A first gear (39) that meshes with the second gear (82) is provided on one side of the lower roller shaft (31).

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