MDF Sweeper

Abstract

The medium-density fiberboard sweeping device disclosed in the present invention comprises: an integral frame beam, a sweeping roller group, a rotating arm, and an electric push rod; because the telescopic amounts of the electric push rod can be different, the sweeping height of each segmented sweeping roller will also be different, and the area with a higher sweeping height will sweep away less fiber, while the area with a lower sweeping height will sweep away relatively more fiber, thereby ultimately achieving the uniformity of the lateral density distribution of the slab in the medium-density fiberboard paving section.

Description

Technical Field

[0001] The invention relates to a medium density fiberboard paving machine, in particular to a medium density fiberboard leveling device capable of adjusting the leveling amount of slab paving in sections in the width direction of a molding line. Background Art

[0002] In the production process of medium / high density continuous press fiberboard, the transverse surface density difference of the paving is one of the important indicators affecting the qualified rate of the finished board, and it is also an important factor affecting the life of the press steel belt. Recently, more and more domestic and foreign board manufacturers have begun to expand the market of ultra-thin density boards of 1mm to 4mm, and better control the transverse density difference of the finished board of ultra-thin density boards within the range of less than 2%. The surface density control of the paving section has begun to play an increasingly critical role, and the requirements for the leveling accuracy of the slabs have become increasingly higher.

[0003] At present, in some advanced density board production lines at home and abroad, it is common to see a combination of a sweeping roller device and a pad adjustment device. The sweeping roller device is a sweeping roller that spans the paving width and is arranged directly above the pad adjustment device. The pad, the core component of the pad adjustment device, is arranged below the forming belt. The pads are evenly distributed in sections along the axis of the sweeping roller in the width direction of the production line, or the pads on both sides of the belt are of the same width, with an independent pad in the middle. The distance between the forming belt and the sweeping roller varies due to the different heights of the pad lift, so the lateral sweeping amount of the paving section is also different, so as to control the final slab paving thickness and achieve the lateral density distribution standard of the finished density board.

[0004] However, the existing "sweeper roller-pad adjustment" combination configuration has the following defects:

[0005] 1. Due to the lateral toughness of the forming belt, the height of the pad is limited, especially when producing medium and thick density boards, the actual effect of the segmented leveling cannot meet expectations;

[0006] 2. The pad is installed under the forming belt. After adjustment, the forming belt will be deformed due to long-term support, which will affect the service life of the forming belt;

[0007] 3. A lot of dust will be generated during the production of fiberboard. The environment around the production line is relatively harsh. The long-term dry friction between the pad and the bottom surface of the forming belt will accumulate dust blocks, thus affecting the adjustment accuracy and life of the device;

[0008] 4. Due to the limited engineering layout space of the existing pad device, it is difficult for operators to observe the leveling effect and operation during adjustment or maintenance. The new leveling device introduced below was produced under this background. Summary of the invention

[0009] One of the technical problems to be solved by the present invention is to provide a medium density fiberboard leveling device which can completely replace the currently common paving leveling device and pad adjusting device.

[0010] The second technical problem to be solved by the present invention is: based on the non-deformation of the paving forming belt, a medium density fiberboard leveling device is provided, which can independently control the paving leveling amount of the medium density fiberboard blank in sections in the width direction of the production line.

[0011] The third technical problem to be solved by the present invention is to provide a medium density fiberboard leveling device which can more effectively control the leveling amount of the medium density fiberboard blank during paving, and is more convenient for observing the operating status and performing maintenance operations.

[0012] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0013] MDF swing leveling device, comprising:

[0014] An integral frame beam, which serves as a main frame of the medium density fiberboard sweeping device, is used to install and fix the components required for the medium density fiberboard sweeping device, and can drive the lifting and pressing of the medium density fiberboard sweeping device as a whole;

[0015] Two groups of sweeping rollers, wherein several sections of sweeping rollers are arranged in the sweeping roller groups, and the power of each group of sweeping rollers comes from its own driving motor, rather than the paving slab driving the sweeping rollers to rotate; all the sectioned sweeping rollers in the two groups of sweeping rollers are arranged in sections and staggered front and back above the paving slab, and the sum of the lengths of all the sectioned sweeping rollers in the two groups of sweeping rollers can just cover the width of the entire paving slab; at least one section of the sectioned sweeping rollers among all the sectioned sweeping rollers is a fixed sectioned sweeping roller, and the rest are movable sectioned sweeping rollers, and the fixed sectioned sweeping rollers are connected to the frame beam as a whole, and the axis position thereof is fixed to the frame beam;

[0016] Two groups of dust suction ports, which can respectively suck away the fibers hooked up by the two groups of sweeping rollers, and remove the excess fibers on the paving slab from the production line;

[0017] Several sections of rotating arms, each movable segmented sweeping roller is supported by the corresponding rotating arm, so that each section of the movable segmented sweeping roller can independently complete the lifting and pressing movements;

[0018] Several electric push rods, all of which are installed on the frame beam and connected to corresponding rotating arms, drive the corresponding rotating arms to move, so as to realize the lifting and pressing movement of each movable segmented sweeping roller.

[0019] In a preferred embodiment of the present invention, the electric push rod is a product that integrates a motor and a ball screw, realizes the conversion of the rotational motion of the motor into linear motion, and can meet the requirements of high-precision position control.

[0020] In a preferred embodiment of the present invention, the outer circumferences of all the sweeping rollers are provided with hook-shaped teeth.

[0021] In a preferred embodiment of the present invention, the linear speed direction of all the sweeping rollers in contact with the paving slab is opposite to the running direction of the forming belt.

[0022] In a preferred embodiment of the present invention, the fixed segmented sweeping roller is rigidly fixed to the frame beam via two fixed arms, the axis position of the fixed segmented sweeping roller is relatively fixed to the frame beam, and is lifted and pressed down together with the frame beam.

[0023] In a preferred embodiment of the present invention, the fixed segmented sweeping roller is arranged in the middle position in the transverse direction of the paving slab.

[0024] In a preferred embodiment of the present invention, all movable segmented sweeping rollers are arranged on both lateral sides of the paving slab.

[0025] In a preferred embodiment of the present invention, the positions and quantities of the movable segmented sweeping rollers arranged on both lateral sides of the paving slab are required to be symmetrical and the same.

[0026] In a preferred embodiment of the present invention, each movable segmented sweeping roller and the corresponding rotating arm and electric push rod form a closed-loop mechanism, and the lifting and pressing down of each movable segmented sweeping roller are accurately controlled by converting the motion equations of the electric push rod and the mechanism.

[0027] In a preferred embodiment of the present invention, a new type of leveling device with two sets of leveling rollers as core components completely replaces the existing common leveling device and pad adjustment device. Compared with the traditional "leveling roller-pad adjustment" combination configuration, it has the following characteristics:

[0028] 1. All the sweeping rollers are arranged just above the surface of the paved slab and have no contact with the forming belt, which completely avoids the damage caused by long-term deformation of the forming belt and increases the service life of the production equipment.

[0029] 2. The sweeping amount of the sweeping roller is controlled by an electric push rod, and its control accuracy can reach 0.01mm, which can fully meet the accuracy requirements of the mechanism adjustment. And the control method of the electric push rod can be connected to the PLC of the host computer, and the unmanned real-time adjustment function can be realized through the program.

[0030] 3. All the main supports, adjustment mechanisms and core sweeping rollers of the present invention are arranged directly above the forming conveyor, so there is a good field of view for observing the operation of the equipment and operating space for daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the forward installation of the medium density fiberboard leveling device of the present invention.

[0032] Figure 2 This is a lateral working principle diagram of the sweeping roller of the medium density fiberboard sweeping device of the present invention.

[0033] Figure 3 This is the working principle diagram of the side section of the sweeping roller. DETAILED DESCRIPTION

[0034] In the present invention, most of the core components of the medium density fiberboard sweeping device 1 of the present invention are arranged directly above the forming belt 3. The sweeping roller is the core component of the whole device. The outer circle of all the sweeping rollers is provided with hook-shaped teeth.

[0035] like Figure 2 As shown, the number of sweeping rollers is reasonably divided into several sections according to the width of the paving slab 2 (the specific number can be determined according to actual needs). The movable sweeping rollers 107 with adjustable height are arranged on both sides of the forming belt 3, and a fixed sweeping roller 108 is arranged in the middle of the forming belt 3. All the sweeping rollers are divided into two groups of sweeping rollers 101 and 102, and the two groups of sweeping rollers 101 and 102 are driven by their own driving motors 109, rather than the two groups of sweeping rollers 101 and 102 rotating due to the advancement of the paving slab 2.

[0036] The outer diameter of each segmented sweeping roller is the same, and the linear speed direction of each segmented sweeping roller in contact with the paving slab 2 must be opposite to the speed direction of the forming belt 3, but the speed can be determined according to the actual production process. A fixed segmented sweeping roller 108 in the middle of the forming belt 3 can be arranged on any group of roller groups 101 or 102, and there is no specific requirement in the present invention.

[0037] The length of the movable segmented sweeping rollers 107 on both sides of the forming belt 3 is much shorter than the length of the fixed segmented sweeping rollers 108 (the specific size can be determined according to the actual design), and the positions and quantities of the movable segmented sweeping rollers 107 arranged on both sides of the forming belt 3 are required to be symmetrical and the same.

[0038] like Figure 3As shown, viewed from the side section of the MDF sweeping device 1, the sum of the lengths of all movable segmented sweeping rollers 107 and fixed segmented sweeping rollers 108 must cover the entire width of the paving slab 2, thereby ensuring that the sweeping amount of the paving slab 2 in the entire width direction can be controlled in segments.

[0039] Except for the fixed roller 108, each movable segmented sweeping roller 107 is movably mounted on the overall frame beam 105 through two rotating arms 104. The axis of each movable segmented sweeping roller 107 is arranged at one end, i.e., the lower end, of the corresponding rotating arm 104. The fulcrum of the rotating arm 104 is hinged on the frame beam 105. The other end, i.e., the upper end, of the rotating arm 104 is hinged to a push rod in an electric push rod 106. The electric push rod 106 is also fixed on the frame beam 105 through a foot support. Through this structure, each movable segmented sweeping roller 107 has an independent height adjustment closed-loop mechanism. The fixed roller 108 is directly fixed on the frame beam 105 through the fixed arm and is not equipped with an electric push rod 106. Therefore, the relative position of the axis of the fixed segmented sweeping roller 108 and the overall frame beam 105 is fixed, and the roller 108 of the fixed segmented sweeping roller 108 can only be driven to rotate by the driving motor of the sweeping roller group.

[0040] All core components are fixed on the overall frame beam 105. The frame beam 105, as the main frame of the present invention, can be lifted and lowered as a whole by a lift, so the adjustment height of the fixed segmented sweeping roller 108 is used as the reference value of the sweeping amount of the entire device. Figure 1 As shown, the electric push rod 106 is extended and retracted to cause the rotating arm 104 to rotate around a fulcrum on the frame beam 105, thereby ultimately achieving the purpose of adjusting the height of the movable segmented sweeping roller 107.

[0041] like Figure 3 As shown, each movable segmented sweeping roller 107 on both sides of the forming belt 3 can freely adjust the height based on the fixed segmented sweeping roller 108 of the middle reference, so that when the slab passes through this mechanism, the entire transverse paving and sweeping amount can be freely adjusted in segments according to the actual needs of the production process.

[0042] In the present invention, both the two sweeping roller groups 101 and 102 are provided with a dust suction port 103. When the paving slab 2 passes through the medium density fiberboard sweeping device 1 of the present invention, the sweeping roller with hook teeth can hook up the fibers on the surface of the slab under the drive of the driving motor 109, and the hooked fibers will be immediately sucked away by the dust suction port 103. Because the extension and contraction amount of the electric push rod 106 can be different, the sweeping height of each segmented sweeping roller will also be high or low. The area with a higher sweeping height will sweep away less fibers, and the area with a lower sweeping height will sweep away relatively more fibers, thereby finally completing the uniformity of the lateral density distribution of the slab in the medium density fiberboard paving section.

Claims

1. Medium density fiberboard leveling device, characterized in that: include: An integral frame beam, which serves as a main frame of the medium density fiberboard sweeping device, is used to install and fix the components required for the medium density fiberboard sweeping device, and can drive the lifting and pressing of the medium density fiberboard sweeping device as a whole; Two groups of sweeping rollers, wherein several sections of sweeping rollers are arranged in the sweeping roller groups, and the power of each group of sweeping rollers comes from its own driving motor, rather than the paving slab driving the sweeping rollers to rotate; all the sectioned sweeping rollers in the two groups of sweeping rollers are arranged in sections and staggered front and back above the paving slab, and the sum of the lengths of all the sectioned sweeping rollers in the two groups of sweeping rollers can just cover the width of the entire paving slab; at least one section of the sectioned sweeping rollers among all the sectioned sweeping rollers is a fixed sectioned sweeping roller, and the rest are movable sectioned sweeping rollers, and the fixed sectioned sweeping rollers are connected to the frame beam as a whole, and the axis position thereof is fixed to the frame beam; Two groups of dust suction ports, which can respectively suck away the fibers hooked up by the two groups of sweeping rollers, and remove the excess fibers on the paving slab from the production line; Several sections of rotating arms, each movable segmented sweeping roller is supported by the corresponding rotating arm, so that each section of the movable segmented sweeping roller can independently complete the lifting and pressing movements; Several electric push rods, all of which are installed on the frame beam and connected to corresponding rotating arms, drive the corresponding rotating arms to move, so as to realize the lifting and pressing movement of each movable segmented sweeping roller.

2. The medium density fiberboard leveling device according to claim 1, characterized in that: The electric push rod is a product that integrates a motor and a ball screw, which can convert the rotational motion of the motor into linear motion and can meet high-precision position control.

3. The medium density fiberboard leveling device according to claim 1, characterized in that: All sweeping rollers have hook-shaped teeth on their outer circumference.

4. The medium density fiberboard leveling device according to claim 1, characterized in that: The linear speed direction of all the sweeping rollers in contact with the paving slab is opposite to the running direction of the forming belt.

5. The medium density fiberboard leveling device according to claim 1, characterized in that: The fixed segmented sweeping roller is rigidly fixed on the frame beam through two fixed arms. The axis position of the fixed segmented sweeping roller is relatively fixed with the frame beam and is lifted and pressed down together with the frame beam.

6. The medium density fiberboard leveling device according to claim 1, characterized in that: The fixed segmented sweeping roller is arranged in the middle position in the transverse direction of the paving slab.

7. The medium density fiberboard leveling device according to claim 6, characterized in that: All movable segmented sweeping rollers are arranged on both lateral sides of the paving slab.

8. The medium density fiberboard leveling device according to claim 7, characterized in that: The positions and quantities of the movable segmented sweeping rollers arranged on both sides of the paving slab are required to be symmetrical and the same.

9. The medium density fiberboard leveling device according to claim 1, characterized in that: Each movable segmented sweeping roller and the corresponding rotating arm and electric push rod form a closed-loop mechanism. The lifting and pressing down of each movable segmented sweeping roller can be accurately controlled by converting the motion equation of the electric push rod and the mechanism.

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