A pressure curtain assembly for air-laying device and air-laying device

Abstract

The utility model provides a pressure curtain assembly for an airflow web-forming device, wherein the pressure curtain assembly is driven by a small roller through a leather curtain transmission to drive a large roller placed at the material outlet of a frame to move, and a sprocket is arranged in the vertical direction of the large roller, one end of the chain is engaged with the tooth tip of the sprocket, and the other end is fixedly connected to the pressure curtain assembly. Connecting plates are arranged on the sides of the large and small rollers for docking, and the utility model solves the problem of uneven, wrinkled and arched cotton nets caused by uneven airflow pressure by adjusting and pressing the junction of the cotton net at the suction port. The utility model also provides an airflow web-forming device equipped with the above-mentioned pressure curtain assembly.

Description

Technical Field

[0001] The utility model relates to an airflow net-forming device, in particular to a pressure curtain component of the airflow net-forming device. Background Art

[0002] In the non-woven product production line, the role of the air-laid machine is to comb the non-woven fibers that have been initially loosened from the front process, and use the high-speed rotating licker-in roller to make the non-woven fibers three-dimensionally distributed in the air flow field to form a uniform cotton web layer, which is then output to the back-end shaping equipment through the web curtain to make non-woven products. Since air-laid has the characteristics of wide adaptability to fibers, it is widely used in the production of non-woven products.

[0003] However, since the net curtain uses the suction force to absorb the fibers and continuously stack them into a net, the cotton net is thinner at the suction port. When it passes through the interface of the cotton net holes at the suction port, because there is no suction here or the suction force is weaker than that at the air outlet, the cotton net here is thicker. At this time, under the effect of the return wind force at the discharge port, the cotton net fibers will be sucked back, causing the cotton net to be uneven, wrinkled and arched. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a pressure curtain assembly for improving the flatness of the web. By arranging a large roller against the discharge port and its height adjustment mechanism in cooperation with a small roller with power and a horizontal adjustment mechanism, free switching of the horizontal and vertical directions is achieved to adjust and press the cotton web, so that the return air force is reduced. By adjusting the intersection relationship between the discharge port and the cotton web fitting position, the compressive stress of the pressure curtain assembly on the cotton web pressing point at the suction port is changed to improve the flatness of the web, and the uniformity of the web on the axial direction of the web forming machine is adjusted to improve.

[0005] In a preferred embodiment: the pressure curtain assembly is arranged at the discharge port of the frame, and the pressure curtain assembly is movably connected to the frame through a height adjustment mechanism to adjust the relative position of the pressure curtain assembly and the cotton web conveyed from the discharge port; the pressure curtain assembly includes a pressure curtain for pressing the cotton web, a first roller and a second roller for driving the pressure curtain to circulate, and the second roller is connected to the first driving mechanism.

[0006] In a preferred embodiment: the diameter of the first roller is greater than the diameter of the second roller.

[0007] In a preferred embodiment: the height adjustment mechanism includes a sprocket, a chain and a second driving mechanism that drives the sprocket to rotate; one end of the chain engages with the tooth tip of the sprocket, and the other end is fixedly connected to the curtain pressure assembly.

[0008] In a preferred embodiment: the curtain pressure assembly further includes a connecting plate, and the connecting plate is connected to the chain; the ends of the first roller and the second roller are connected to the connecting plate.

[0009] In a preferred embodiment: the ends of the first roller and the second roller are connected to the connecting plate via a horizontal adjustment mechanism.

[0010] In a preferred embodiment: the horizontal adjustment mechanism includes a strip-shaped perforated plate arranged on the connecting plate and extending in the horizontal direction, and bolts for connecting the connecting plate and the first roller and the second roller.

[0011] In a preferred embodiment: the frame is also provided with an adjustable foot cup, and the inclination of the frame discharge port can be changed by adjusting the height of the foot cup.

[0012] In a preferred embodiment: rollers are installed at the bottom of the frame.

[0013] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0014] The utility model provides a pressure curtain component of an airflow web-forming device, by which the phenomenon of wrinkling and arching of the cotton web caused by the difference in wind pressure at the junction of the cotton web at the suction port is solved, the cotton web is pressed by the component to reduce the return wind force, and the relative position relationship with the incision in the horizontal or vertical direction is adjusted by coordinating the height adjustment mechanism and the horizontal adjustment mechanism to control the expected thickness of the cotton web, and the flatness of the web can be improved when the rotation speed of the net curtain remains unchanged, so that the output quality is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic elevation diagram of a preferred embodiment of the utility model;

[0016] Figure 2 It is an axonometric diagram of a preferred embodiment of the utility model;

[0017] Figure 3 It is a large sample detailed drawing of the preferred embodiment of the utility model; DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] refer to Figure 1 As shown, this embodiment provides a pressure curtain assembly of an airflow web-forming device, including: a large roller 6 located at the discharge port for resisting and adjusting the return air outlet, and a small roller 8 connected to the large roller 6 with a leather curtain for providing power, and a sprocket 4 connected to the large roller 6 through a chain 5, and a strip perforated plate 7 and a connecting plate 501 for connecting the large and small rollers.

[0022] In order to enable this component to have the function of adjusting the distance of the vertical engagement points, this embodiment is provided with a sprocket 4 connected to the large roller 6 through a chain 5. One end of the chain 5 is engaged with the tooth tip of the sprocket 4, and the other end is fixedly connected to the curtain pressure component connecting plate 501. The port of the sprocket 4 is connected to the second driving mechanism. The second driving mechanism is started to drive the sprocket to rotate circumferentially to recover the chain, so that the curtain pressure component is lifted vertically. The driving mechanism described in this case is a DC motor. Of course, other common motorized lifting methods existing in the prior art can also be selected for replacement, such as a cylinder, which also belongs to the simple replacement of this embodiment.

[0023] In the vertical lifting operation, since it is necessary to drive the second driving mechanism to realize the lifting and lowering process of the pressure curtain assembly, it is easy to cause excessive operation resulting in excessive pressure angle gap and the like. In view of this, the pressure curtain assembly is provided with a vertical limiter 502 connected to the frame 1 at the connecting plate 501 at the end of the large roller 6. The use of the limiter allows the pressure curtain assembly to move within the limited position, while fixing the horizontal position of the large roller to avoid problems caused by shaking.

[0024] In order to enable this component to have the function of adjusting the distance of the horizontal contact points, this embodiment provides a strip hole plate 7 for connecting the large and small rollers, which is arranged radially symmetrically along the pressure curtain component. The strip hole plate is hingedly connected, and the hinge node has good flexibility. It cooperates with the bearing rod to connect the large and small rollers into a whole in the horizontal direction. While ensuring the horizontal stability of the pressure curtain assembly, the relative position of the pressure curtain assembly with respect to the intersection point of the suction port cotton net can be adjusted to control the flatness of the net.

[0025] It should be noted that in this case, the connecting plate 501 and the strip hole plate 7 are hingedly connected by bolts. From a microscopic point of view, this connection form can make the small roller controllable in the vertical direction within a limited range, making the operation during the pressing process more flexible.

[0026] Furthermore, from the arrangement of the large and small rollers, it can be seen that the small roller 8 provides a power source for the large roller 6, and the two are connected by a leather curtain to realize operation, which is a deceleration device. When the driving mechanism of the web curtain 14 and the driving mechanism of the pressure curtain assembly operate at the same frequency, the pressure curtain assembly is decelerated under the action of the small roller 8, thereby increasing the compressive stress at the interface of the suction port cotton web and increasing the pre-compression effect of the pressure curtain assembly.

[0027] In addition, this practical case is also provided with an adjustable foot cup 12, by adjusting the height of the foot cup, the inclination of the frame discharge port can be changed. When used in conjunction with the pressure curtain assembly, the thickness of the output product can be more flexibly controlled. The operation is simple and portable, and the practicality is strong.

[0028] According to the principle of airflow web formation, the frame described in this case also includes a cotton stripping section, a cotton inlet duct and an equipment airflow box. The cotton stripping section is composed of a guide plate 3 and a licker-in roller 2 arranged above the cotton inlet duct. The licker-in roller rotates at a high speed to make the initially loosened non-woven fibers present a three-dimensional distribution in the airflow field, and adhere to the mesh curtain at the mesh eye under the action of the equipment air flow above the cotton inlet duct. In addition, the air suction port 10 and the bellows 11 arranged in the frame continuously suck air from the non-woven fibers at the mesh eye position, and the cotton net filters the air so that the non-woven fibers are firmly adsorbed on the mesh curtain. Driven by the driving device, the web curtain 14 rotates to drive the non-woven fiber web through the pressure curtain assembly.

[0029] Considering that the device may need to be adjusted or moved in the use scenario, a roller 13 is installed at the bottom of the frame in this case. The roller is a universal wheel with a fastening device, which is more convenient and quick when moving and transferring.

[0030] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A pressure curtain assembly for an air-laid device, characterized in that: The pressure curtain assembly is arranged at the discharge port of the frame, and the pressure curtain assembly is movably connected to the frame through a height adjustment mechanism to adjust the relative position of the pressure curtain assembly and the cotton web delivered from the discharge port; The pressure curtain assembly includes a pressure curtain for pressing the cotton web, a first roller and a second roller for driving the pressure curtain to circulate, and the second roller is connected to the first driving mechanism.

2. A pressure curtain assembly for an air-laid device according to claim 1, characterized in that: The diameter of the first roller is greater than the diameter of the second roller.

3. A pressure curtain assembly for an air-laid device according to claim 1, characterized in that: The height adjustment mechanism comprises a sprocket, a chain and a second driving mechanism that drives the sprocket to rotate; one end of the chain is engaged with the tooth tip of the sprocket, and the other end is fixedly connected to the curtain pressure assembly.

4. A pressure curtain assembly for an air-laid device according to claim 3, characterized in that: The curtain pressure assembly further comprises a connecting plate, and the connecting plate is connected to the chain; ends of the first roller and the second roller are connected to the connecting plate.

5. A pressure curtain assembly for an air-laid device according to claim 4, characterized in that: The ends of the first roller and the second roller are connected to the connecting plate through a horizontal adjustment mechanism.

6. A pressure curtain assembly for an air-laid device according to claim 5, characterized in that: The horizontal adjustment mechanism includes a strip-shaped perforated plate arranged on the connecting plate and extending in the horizontal direction, and bolts for connecting the connecting plate and the first roller and the second roller.

7. A pressure curtain assembly for an air-laid device according to claim 1, characterized in that: The frame is also provided with an adjustable foot cup, and the inclination of the frame discharge port can be changed by adjusting the height of the foot cup.

8. The pressure curtain assembly for an air-laid device according to claim 1, characterized in that: Rollers are installed at the bottom of the frame.

9. An air-laid device, characterized in that The invention is equipped with the pressure curtain assembly described in any one of claims 1 to 8.

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