CN112476699A

CN112476699A - Medium density fiberboard sweeping device

Info

Publication number: CN112476699A
Application number: CN202011452763.1A
Authority: CN
Inventors: 陈添喆; 朱凯旋
Original assignee: Shanghai Wood Based Panel Machinery Co Ltd
Current assignee: Shanghai Wood Based Panel Machinery Co Ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-03-12

Abstract

The invention discloses a medium density fiberboard sweeping device, which comprises: the integral machine frame beam, the sweeping roller set, the rotating arm and the electric push rod are arranged on the machine frame beam; because the stretching amount of the electric push rod can be different, the sweeping height of each section of segmented sweeping roller is different, less fibers are swept in the area with higher sweeping height, more fibers are swept in the area with lower sweeping height, and the uniformity of the transverse density distribution of the plate blank in the medium-density fiberboard paving work section is finally finished.

Description

Medium density fiberboard sweeping device

Technical Field

The invention relates to a medium density fiberboard paving machine, in particular to a medium density fiberboard sweeping device capable of adjusting slab paving sweeping amount in a sectional mode in the width direction of a forming line.

Background

In the production process of the medium/high density continuous press fiber board, the transverse surface density difference of paving and forming is an important index which influences the qualification rate of the finished board and is also an important factor which influences the service life of the press steel belt. More and more plate manufacturers at home and abroad recently begin to expand the market of ultrathin density plates with the thickness of 1 mm-4 mm, the transverse density difference of finished plates of the ultrathin density plates is better controlled within the range of less than 2%, the surface density control of a paving working section begins to play a more and more critical role, and the requirement on the sweeping precision of plate blanks is higher and higher.

At present, in some advanced density board production lines at home and abroad, a sweeping roller device and a base plate adjusting device can be commonly combined and configured. The sweeping roller device is a sweeping roller which spans the pavement width and is arranged right above the base plate adjusting device. The core component of the base plate adjusting device, namely the base plate, is arranged below the forming belt. The backing plates are equally distributed in the width direction of the production line in sections along the axis of the flat sweeping roller, or the backing plates on two sides of the belt in sections have the same width, and an independent backing plate is arranged in the middle. The distance between the forming belt and the sweeping roller is different due to different heights of the backing plate, and the transverse sweeping amount of the laying work section is different, so that the laying thickness of the final plate blank is controlled, and the transverse density distribution standard of the finished density plate is achieved.

However, the existing "sweep roller-shim plate adjustment" combination configuration has the following defects:

1. because the transverse toughness of the forming belt enables the lifting height of the backing plate to be limited, the actual effect obtained by sectional sweeping and leveling cannot reach the expectation particularly when the medium-thickness density plate is produced;

2. the backing plate is arranged below the forming belt, and after adjustment, the forming belt can deform due to long-term lifting, so that the service life of the forming belt is influenced;

3. a large amount of dust is generated during the production of the fiberboard, the environment around the production line is relatively severe, and dust blocks can be accumulated due to long-term dry friction between the base plate and the lower bottom surface of the forming belt, so that the adjustment precision of the device and the service life of equipment are influenced;

4. because the engineering arrangement space of the existing base plate device is limited, the sweeping effect and operation are not easy to observe by operators during adjustment or maintenance. The new sweeping device described below is created in this context.

Disclosure of Invention

One of the technical problems to be solved by the present invention is: the medium-density fiberboard sweeping device can completely replace the conventional paving sweeping device and a base plate adjusting device.

The second technical problem to be solved by the present invention is: the medium-density fiberboard sweeping device is established on the basis that a forming belt is not deformed, and can independently control the sweeping amount of medium-density fiberboard blanks in a sectional mode in the width direction of a production line.

The third technical problem to be solved by the invention is that: the medium-density fiberboard sweeping device has the advantages that the medium-density fiberboard blank laying sweeping amount is more effectively controlled, and the operation condition observation and maintenance operation are more convenient.

The technical problem to be solved by the invention can be realized by the following technical scheme:

medium density fiberboard sweeping device, comprising:

the integral frame beam is used as a main frame of the medium-density fiberboard sweeping device, is used for installing and fixing parts required by the medium-density fiberboard sweeping device, and can integrally drive the medium-density fiberboard sweeping device to lift and press down;

the sweeping roller group is internally provided with a plurality of sections of segmented sweeping rollers, the power of each sweeping roller is derived from a driving motor of the sweeping roller group, and the non-paved plate blank drives the sweeping rollers to rotate; all the segmented sweeping rollers in the two groups of sweeping roller sets are arranged above the paved plate blank in a segmented manner in a staggered manner from front to back, and the sum of the lengths of all the segmented sweeping rollers in the two groups of sweeping rollers can just cover the width of the whole paved plate blank; at least one section of the segmented sweeping rollers are fixed segmented sweeping rollers, the rest are movable segmented sweeping rollers, the fixed segmented sweeping rollers are connected with the frame beam into a whole, and the axial line position of the fixed segmented sweeping rollers is fixed with the frame beam;

the dust suction ports can respectively suck the fibers hooked by the two sets of sweeping roller sets, and redundant fibers on the paving plate blank are removed from a production line;

each movable segmented sweeping roller is supported by the corresponding rotating arm, so that each movable segmented sweeping roller can independently complete the movement actions of lifting and pressing;

and all the electric push rods are arranged on the frame beam and connected with the corresponding rotating arms to drive the corresponding rotating arms to act so as to realize that each section of movable sectional sweeping roller independently completes lifting and pressing movement.

In a preferred embodiment of the present invention, the electric push rod is a product integrating a motor and a ball screw, so that the rotation motion of the motor is converted into a linear motion, and high-precision position control can be satisfied.

In a preferred embodiment of the invention, the outer circumference of all the sweep rollers is provided with hook-shaped teeth.

In a preferred embodiment of the invention, the linear speed of the contact of the rolls of all the sweeping rollers with the mat is opposite to the running direction of the forming belt.

In a preferred embodiment of the invention, the fixed segmented sweeping roller is rigidly fixed to the frame beam by two fixed arms, the axis position of the fixed segmented sweeping roller is fixed relative to the frame beam and is lifted and pressed down together with the frame beam.

In a preferred embodiment of the invention, the segmented fixed sweeping roller is disposed at a laterally intermediate position of the paving slab.

In a preferred embodiment of the invention, all the movable segmented sweeping rollers are arranged at both lateral sides of the paving slab.

In a preferred embodiment of the invention, the positions and the number of the movable segmented sweeping rollers arranged on the two transverse sides of the paving slab are symmetrically the same.

In a preferred embodiment of the invention, each movable segmented sweeping roller, the corresponding rotating arm and the electric push rod form a set of closed-loop mechanism, and the lifting and the pressing of each movable segmented sweeping roller are accurately controlled through the conversion of the electric push rod and a mechanism motion equation.

In a preferred embodiment of the invention, the novel sweeping device taking two groups of sweeping roller sets as core components completely replaces the existing common sweeping device and backing plate adjusting device. Compared with the traditional 'sweep roller-cushion plate adjustment' combined configuration, the combined configuration has the following characteristics:

1. all the sweeping rollers are uniformly arranged right above the surface of the paved plate blank and are not in contact with the forming belt completely, so that the damage caused by long-term deformation of the forming belt is thoroughly avoided, and the service life of production equipment is prolonged.

2. The sweeping amount of the lifting of the sweeping roller is controlled by an electric push rod, the control precision of the sweeping roller can reach 0.01mm, and the precision requirement of mechanism adjustment can be completely met. And the control mode of the electric push rod can be connected into a PLC of an upper computer, and the unmanned real-time adjusting function is realized through a program.

3. All the main body supports, the adjusting mechanism and the core sweeping roller are arranged right above the forming conveyor, so that a good equipment operation observation visual field and an operation space for daily maintenance are provided.

Drawings

Fig. 1 is a schematic view of the forward installation of the sweeping device of the density fiberboard sweeping device of the present invention.

Fig. 2 is a schematic diagram of the lateral working principle of a sweeping roller shaft of the density fiberboard sweeping device.

Fig. 3 is a side cross-sectional working principle diagram of the flat sweeping roller.

Detailed Description

In the invention, most core components of the medium density fiberboard sweeping device 1 are arranged right above the forming belt 3. Wherein the sweep roller is a core component of the entire apparatus. The outer circles of all the sweeping rollers are provided with hook-shaped teeth.

As shown in fig. 2, the number of the sweep rolls is a plurality of segmented sweep rolls (the specific number can be determined according to actual requirements) reasonably segmented according to the width of the paving slab 2, the movable segmented sweep rolls 107 which can be adjusted up and down in height are arranged on both sides of the forming belt 3, and the fixed segmented sweep roll 108 is arranged in the middle of the forming belt 3. All the sweep rolls are divided into two sets of

sweep roll groups

101 and 102, and both sets of

sweep roll groups

101 and 102 are driven by their own drive motors 109, rather than the two sets of

sweep roll groups

101 and 102 being rotated by the advancement of the paving slab 2.

The excircle size of each section of segmented sweeping roller is the same, the linear speed direction of the roller of each section of segmented sweeping roller, which is contacted with the paving slab 2, is opposite to the running speed direction requirement of the forming belt 3, but the speed can be determined according to the actual production process. A fixed segmented sweep roller 108 at a position intermediate the forming belt 3 may be disposed on either of the

nip roller sets

101 or 102, without particular limitation in the present invention.

The length of the movable segmented sweeping rollers 107 on both sides of the forming belt 3 is much shorter than that of the fixed segmented sweeping rollers 108 (the specific dimension can be determined according to the actual design), and the positions and the number of the movable segmented sweeping rollers 107 arranged on both sides of the forming belt 3 are required to be symmetrically the same.

As shown in fig. 3, the sum of the lengths of all the movable segment sweeping rollers 107 and the fixed segment sweeping rollers 108 must cover the entire width of the mat 2 when viewed in a lateral section of the present medium density fiberboard sweeping device 1, so as to ensure that the sweeping amount of the mat 2 in the entire width direction can be controlled in segments.

Except for the fixed roller 108, each section of movable segmented sweeping roller 107 is movably mounted on the integral frame beam 105 through two rotating arms 104, the shaft of each section of movable segmented sweeping roller 107 is arranged at one end, namely the lower end, of the corresponding rotating arm 104, the pivot of the rotating arm 104 is hinged on the frame beam 105, the other end, namely the upper end, of the rotating arm 104 is hinged with a push rod in an electric push rod 106, and the electric push rod 106 is also fixed on the frame beam 105 through a foot support. By the structure, each section of the movable segmented sweeping roller 107 is provided with an independent height adjusting closed-loop mechanism. The fixed roller 108 is directly fixed on the frame beam 105 through a fixed arm without the electric push rod 106, so that the relative position of the axis of the fixed segmented sweeping roller 108 and the integral 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.

All the core components are fixed on the integral frame beam 105, the frame beam 105 is used as the main frame of the invention, and the integral lifting can be completed by the lifter, so that the adjusting height of the fixed segmented sweeping roller 108 is used as the reference value of the sweeping amount of the whole device. As shown in fig. 1, the extension and retraction of the electric push rod 106 causes the rotating arm 104 to rotate around a pivot point on the frame beam 105, thereby finally achieving the purpose of adjusting the height of the movable segmented sweeping roller 107.

As shown in FIG. 3, each section of the movable segmented sweeping rollers 107 on both sides of the forming belt 3 can freely adjust the height based on the fixed segmented sweeping rollers 108 of the middle reference, so that after the slab passes through the mechanism, the whole transverse paving sweeping amount can be freely adjusted in a segmented manner according to the actual requirements of the production process.

In the present invention, two sets of flat-sweeping roller sets 101 and 102 are provided with a dust suction port 103. When the pavement slab 2 passes through the density fiberboard sweeping device 1, the sweeping roller with the hook teeth is driven by the driving motor 109 to hook fibers on the surface of the slab, and the hooked fibers are immediately sucked away by the dust suction port 103. Because the stretching amount of the electric push rod 106 can be different, the sweeping height of each section of segmented sweeping roller is different, less fibers are swept in the area with higher sweeping height, more fibers are swept in the area with lower sweeping height, and the uniformity of the transverse density distribution of the plate blank in the medium-density fiberboard paving work section is finally finished.

Claims

1. Well density fibreboard sweeps flat device, its characterized in that includes:

the sweeping roller group is internally provided with a plurality of sections of segmented sweeping rollers, the power of each sweeping roller is derived from a driving motor of the sweeping roller group, and the non-paved plate blank drives the sweeping rollers to rotate; all the segmented sweeping rollers in the two groups of sweeping roller sets are arranged above the paved plate blank in a segmented manner in a staggered manner from front to back, and the sum of the lengths of all the segmented sweeping rollers in the two groups of sweeping rollers can just cover the width of the whole paved plate blank; at least one section of the segmented sweeping rollers are fixed segmented sweeping rollers, the rest are movable segmented sweeping rollers, the fixed segmented sweeping rollers are connected with the rack beam into a whole, and the axial line position of the fixed segmented sweeping rollers is fixed with the rack beam;

2. The sweeping device for medium-density fiberboards as claimed in claim 1, wherein the electric push rod is a product integrating a motor and a ball screw, so that the rotation motion of the motor is converted into linear motion, and the high-precision position control can be satisfied.

3. A medium density fiberboard sweeping apparatus according to claim 1, wherein the outer circumference of all the sweeping rollers is provided with hook-shaped teeth.

4. A medium density fiberboard sweeping apparatus according to claim 1, wherein the linear speed direction of the rollers of all the sweeping rollers contacting the mat is opposite to the running direction of the forming belt.

5. The medium density fiberboard sweeping apparatus of claim 1, wherein the fixed segmented sweeping roller is rigidly fixed to the frame beam by two fixed arms, and the fixed segmented sweeping roller has an axial position fixed relative to the frame beam, and is lifted and pressed down together with the frame beam.

6. The medium density fiberboard sweeping apparatus of claim 1, wherein the segmented fixed sweeping rollers are disposed at a laterally intermediate position of the paving mat.

7. The medium density fiberboard sweeping apparatus of claim 6, wherein all of the movable segmented sweeping rollers are disposed at both lateral sides of the mat.

8. A sweeping device for medium density fiberboard of claim 7, wherein the position and the number of the movable segmented sweeping rollers arranged on the two lateral sides of the paving slab are symmetrically the same.

9. The sweeping device for medium density fiberboard of claim 1, wherein each active segmented sweeping roller, the corresponding rotating arm and the electric push rod form a set of closed-loop mechanism, and the lifting and pressing of each active segmented sweeping roller are precisely controlled through the conversion of the electric push rod and the motion equation of the mechanism.