CN116160534B

CN116160534B - Pre-pressing device for processing medium-density fiberboard

Info

Publication number: CN116160534B
Application number: CN202211660894.8A
Authority: CN
Inventors: 苏殿顺
Original assignee: Pizhou Xinshijie Wood Co ltd
Current assignee: Pizhou Xinshijie Wood Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-09-12
Anticipated expiration: 2042-12-23
Also published as: CN116160534A

Abstract

The utility model discloses a prepressing device for processing a medium density fiberboard, which relates to the technical field of fiberboard processing, and particularly relates to a prepressing device for processing a medium density fiberboard. This pre-compaction device for medium density fiberboard processing passes through the moving part that sets up on the connecting rod, when moving part and mounting contact, can promote the grip block and move, make two grip blocks be close to each other and carry out the centre gripping spacing to the fiberboard of placing on the clamping mechanism, avoid the fiberboard to take place the skew when the pre-compaction, and need not to add actuating mechanism in addition, the practicality is strong, when moving part and mounting separate, under the effect of extension spring self, can stimulate the grip block and reset, thereby the fiberboard after the convenience is taken off.

Description

Pre-pressing device for processing medium-density fiberboard

Technical Field

The utility model relates to the technical field of fiberboard processing, in particular to a prepressing device for medium-density fiberboard processing.

Background

The medium density fiber board is made of wood fiber or other plant fiber through crushing, fiber separation, drying, applying urea-formaldehyde resin or other suitable adhesive, hot pressing to obtain artificial board with excellent physical and mechanical performance, decoration performance, machining performance, etc. and through chipping, hot grinding, fiber drying, spreading, hot pressing, sewage treatment, etc. the pre-pressing machine is one auxiliary machine for plywood production line and is one mechanical equipment for initial adhesion before gluing to shorten the hot pressing period and raise the quality of board.

Through retrieving, in the prepressing equipment for medium density fiberboard processing of patent publication number CN208179853U, the utility model of describing discloses a prepressing equipment for medium density fiberboard processing, which comprises a base, the top fixedly connected with pneumatic cylinder of base, the top fixedly connected with support of pneumatic cylinder, the top fixedly connected with pressing plate of support, the inside joint of pressing plate bottom plate has the reinforcing plate, the bottom fixedly connected with buffer seat of pressing plate, the bottom fixedly mounted of buffer seat has vibrating motor, one side fixedly connected with regulating part of pressing plate. This pre-compaction equipment for medium density fiberboard processing is through being provided with reinforcing plate, pressing disc, regulating part, buffer seat and vibrating motor, and the fibre mixture is deposited to the pressing disc, makes the pre-compaction preparation, and the reinforcing plate improves the intensity of pressing disc, utilizes vibrating motor's operation to vibrate through the buffering drive pressing disc of buffer seat, makes fibre mixture dispersion even, improves the suppression effect.

The utility model discloses prepressing equipment for processing a medium density fiberboard, which comprises a rack and a prepressing machine, wherein the prepressing machine is arranged in the rack, an inductor is arranged on the side wall of a fiberboard discharging device, whether the thickness of the fiberboard is uniform or not can be paid attention to in real time, an adjusting knob is arranged on the surface of the inductor, the thickness and the prepressing time can be set according to requirements, the inductor can sense the thickness of the wood being compressed, and an alarm is sent out through an indicator lamp, so that the effect of uniform density of the fiberboard is achieved, the defective rate of the fiberboard is effectively reduced, and the production cost is saved.

The utility model discloses a pre-pressing device for processing a flame-retardant medium density fiberboard, which comprises a base, wherein the upper end face of the base is provided with a support frame, the support frame is of -shaped structure, the lower end face of a horizontal arm of the support frame is vertically connected with a hydraulic cylinder, the bottom end of the hydraulic cylinder is horizontally connected with a pre-pressing plate, the upper end face of the base is provided with a fixing seat of a U-shaped structure, the inside of the fixing seat is horizontally fixed with a fixing plate, a bottom plate is arranged above the fixing plate, two sides of the bottom plate are provided with side plates, two side inner walls of the top of the fixing seat are connected with corresponding side plates through first springs, packing is carried out between the bottom plate and the side plates, the packing is compacted by the pre-pressing plate, a heating pipe inside the bottom plate heats wood, and heat preservation cotton of the side plates keeps the wood, so that the heat preservation cotton of the side plates is heated uniformly.

In the prior art, the pre-pressing device is used for pre-pressing, so that the fiber mixture is often required to be dispersed, and when the fiber mixture is unevenly dispersed, the defect of poor quality of the plate is caused.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a prepressing device for processing a medium-density fiberboard, which solves the problems that the prior prepressing device is often required to disperse fiber mixture in the prepressing process in the prior art, and the quality of the board is poor due to uneven dispersion of the fiber mixture.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a pre-compaction device for medium density fiberboard processing, includes the device frame, with install the pay-off motor in the device frame left side, the inside of device frame is provided with clamping mechanism, the upper surface symmetry of device frame is provided with four bracing pieces, four the upper surface of bracing piece all is fixed with the mounting panel, the upper surface mounting of mounting panel has the pneumatic cylinder, the output of pneumatic cylinder is connected with the pre-compaction board, the display screen is installed to the outer wall of device frame, be bolted connection between display screen and the device frame;

the feeding motor comprises a feeding motor, a feeding motor and a clamping mechanism, wherein the feeding motor is characterized in that the feeding motor is provided with a screw rod, a movable block, guide rods, a connecting groove, limiting plates and guide blocks at the output end, the outer surface of the screw rod is connected with the movable block, one side of the movable block is connected with the guide rods, the connecting groove is connected above the movable block, two guide blocks are symmetrically arranged on the lower surface of the clamping mechanism, and the limiting plates are connected at the lower ends of the two guide blocks;

the screw rod and the feeding motor form a rotating structure, the screw rod penetrates into the movable block, the clamping mechanism forms a sliding structure with the device frame through the guide block and the limiting plate, and the movable block is fixedly connected with the clamping mechanism;

the clamping mechanism comprises a fixed side plate, clamping plates, protection rubber mats, connecting rods, tension springs, movable pieces, fixing pieces, heating pipes, heating wires and pressure sensors, wherein two connecting rods are symmetrically connected inside the fixed side plate, one ends of the two connecting rods are respectively fixed with the clamping plates, the outer walls of the clamping plates are provided with the protection rubber mats, one sides of the two connecting rods are respectively provided with the tension springs, the other ends of the two connecting rods are respectively connected with the movable pieces, and one side of each movable piece is provided with the fixing piece;

the protection cushion and the clamping plate are of an integral fixing structure, the clamping plate forms an elastic telescopic structure through the connecting rod and the tension spring and the fixed side plate, the movable piece is fixedly connected with the connecting rod, and meanwhile the connecting rod and the fixing piece are matched with each other.

Optionally, the upper surface of clamping mechanism is provided with pressure sensor, the inside equidistance of clamping mechanism is equipped with a plurality of heating pipes, the inside of heating pipe is provided with the heating wire.

Optionally, the pressure sensor is connected with the clamping mechanism through a screw, and the heating wire and the heating pipe are of an integrated fixing structure.

Optionally, be equipped with gag lever post, stopper, driving motor, eccentric wheel, fixed plate and fixing bolt on the prepressing board, the upper surface of gag lever post is provided with the stopper, constitute extending structure between prepressing board and the pneumatic cylinder.

Optionally, internally mounted of pre-compaction board has two driving motor, two the eccentric wheel has all been settled to driving motor's output shaft, two driving motor's one side all is provided with the fixed plate, the internally mounted of fixed plate has fixing bolt.

Optionally, the driving motor is detachably connected with the pre-pressing plate through a fixing plate and a fixing bolt, and a rotating structure is formed between the eccentric wheel and the driving motor.

The utility model provides a prepressing device for processing a medium-density fiberboard, which has the following beneficial effects:

1. according to the prepressing device for processing the medium-density fiberboard, the screw rod can be driven to rotate through the arranged feeding motor, and the movable block horizontally moves under the cooperation of the guide rod, so that the clamping mechanism is driven to move, a worker can conveniently take down the fiberboard after processing or place the fiberboard needing to be processed, the guiding effect can be achieved through the arranged guide block and the limiting plate, and the phenomenon that the clamping mechanism deflects during movement is avoided;

2. according to the prepressing device for processing the medium-density fiberboard, the movable piece is arranged on the connecting rod, when the movable piece is contacted with the fixed piece, the clamping plates can be pushed to move, so that the two clamping plates are mutually close to clamp and limit the fiberboard placed on the clamping mechanism, the fiberboard is prevented from shifting during prepressing, a driving mechanism is not required to be additionally added, the practicability is high, and when the movable piece and the fixed piece are separated, the clamping plates can be pulled to reset under the action of the tension spring, so that the processed fiberboard can be conveniently taken down;

3. according to the prepressing device for processing the medium-density fiberboard, the heating pipe arranged in the clamping mechanism can heat the clamping mechanism under the cooperation of the heating wires, so that the fiberboard is heated, the prepressing is convenient, the pressure sensor can detect the pressure born by the fiberboard, the pressure is displayed through the display screen, and the observation of staff is convenient;

4. the prepressing device for processing the medium-density fiberboard can drive the prepressing plate to vertically move through the arranged hydraulic cylinder so as to prepress the fiberboard; through the driving motor who sets up in the prepressing plate, can drive the eccentric wheel and rotate for the prepressing plate produces certain vibrating force, makes the even dispersion of the fibre mixture in the fibreboard, improves the processingquality of fibreboard.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of a frame of the apparatus of the present utility model;

FIG. 3 is a schematic top view of the apparatus frame of the present utility model;

FIG. 4 is a schematic view of a partial enlarged structure of the portion A in FIG. 3 according to the present utility model;

FIG. 5 is a schematic cross-sectional view of a clamping mechanism according to the present utility model;

fig. 6 is a schematic top view of the pre-pressing plate of the present utility model.

In the figure: 1. a device frame; 2. a feeding motor; 201. a screw rod; 202. a movable block; 203. a guide rod; 204. a connecting groove; 205. a limiting plate; 206. a guide block; 3. a clamping mechanism; 301. fixing the side plates; 302. a clamping plate; 303. a protective rubber mat; 304. a connecting rod; 305. a tension spring; 306. a movable member; 307. a fixing member; 308. heating pipes; 309. heating wires; 310. a pressure sensor; 4. a support rod; 5. a mounting plate; 6. a hydraulic cylinder; 7. a pre-pressing plate; 701. a limit rod; 702. a limiting block; 703. a driving motor; 704. an eccentric wheel; 705. a fixing plate; 706. a fixing bolt; 8. and a display screen.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Description of the preferred embodiments

As shown in fig. 1-2, the present utility model provides a technical solution: the utility model provides a fixing device is used in optical glass processing, including device frame 1, with install at the left feeding motor 2 of device frame 1, the inside of device frame 1 is provided with clamping mechanism 3, the upper surface symmetry of device frame 1 is provided with four bracing pieces 4, the upper surface of four bracing pieces 4 all is fixed with mounting panel 5, the upper surface mounting of mounting panel 5 has pneumatic cylinder 6, the output of pneumatic cylinder 6 is connected with precompaction board 7, display screen 8 is installed to the outer wall of device frame 1, be bolted connection between display screen 8 and the device frame 1.

Example two

The scheme in the first embodiment is further described below in conjunction with a specific working manner, and the details are described below:

as shown in fig. 2 to 5, as a preferred embodiment, in addition to the above-described mode, further: the feeding motor 2 is provided with a screw rod 201, a movable block 202, a guide rod 203, a connecting groove 204, a limiting plate 205 and a guide block 206 at the output end, the movable block 202 is connected to the outer surface of the screw rod 201, one side of the movable block 202 is connected with the guide rod 203, the connecting groove 204 is connected above the movable block 202, two guide blocks 206 are symmetrically arranged on the lower surface of the clamping mechanism 3, the limiting plate 205 is connected to the lower ends of the two guide blocks 206, a rotating structure is formed between the screw rod 201 and the feeding motor 2, the screw rod 201 penetrates into the movable block 202, the clamping mechanism 3 forms a sliding structure with the device frame 1 through the guide block 206 and the limiting plate 205, the movable block 202 is fixedly connected with the clamping mechanism 3, the screw rod 201 can be driven to rotate through the arranged feeding motor 2, the movable block 202 moves horizontally under the cooperation of the guide rod 203, so that the clamping mechanism 3 is driven to move, a worker can conveniently take down a fiber plate to be processed, or place the fiber plate to be processed, the clamping mechanism 3 can be prevented from shifting when the clamping mechanism 3 moves through the arranged guide block 206 and the limiting plate 205; the clamping mechanism 3 comprises a fixed side plate 301, a clamping plate 302, a protection rubber pad 303, a connecting rod 304, a tension spring 305, a movable part 306, a fixed part 307, a heating pipe 308, an electric heating wire 309 and a pressure sensor 310, wherein the two connecting rods 304 are symmetrically connected in the fixed side plate 301, one ends of the two connecting rods 304 are respectively fixed with the clamping plate 302, the outer wall of the clamping plate 302 is provided with the protection rubber pad 303, an integral fixing structure is arranged between the protection rubber pad 303 and the clamping plate 302, one sides of the two connecting rods 304 are respectively provided with the tension spring 305, the clamping plate 302 forms an elastic telescopic structure with the fixed side plate 301 through the connecting rods 304 and the tension spring 305, the other ends of the two connecting rods 304 are respectively connected with the movable part 306, the movable part 306 is fixedly connected with the connecting rods 304, one side of the movable part 307 is mutually matched with the fixed part 307, the clamping plate 302 can be pushed to move when the movable part 306 and the fixed part 307 are contacted, so that the two clamping plates 302 are mutually close to each other to clamp a fiber plate placed on the clamping mechanism 3, the fiber plate is prevented from shifting in time, the fiber plate is not required to be clamped, the tension spring 305 is strongly added, the movable part 306 is not required to be separated from the movable part, and the movable part 306 is reset, and the movable part is convenient to separate from the movable part from the fixed part, and the fiber plate is easy to be processed.

As shown in fig. 1, 2, 5 and 6, as a preferred embodiment, the above embodiment is further described as follows: the upper surface of the clamping mechanism 3 is provided with a pressure sensor 310, the pressure sensor 310 is connected with the clamping mechanism 3 through screws, a plurality of heating pipes 308 are arranged in the clamping mechanism 3 at equal intervals, heating wires 309 are arranged in the heating pipes 308, the heating wires 309 and the heating pipes 308 are of an integral fixing structure, the clamping mechanism 3 can be heated through the heating pipes 308 arranged in the clamping mechanism 3 under the cooperation of the heating wires 309, so that a fiberboard is heated, prepressing is facilitated, the pressure born by the fiberboard can be detected through the pressure sensor 310, and the pressure is displayed through a display screen 8, so that observation of workers is facilitated; the limiting rod 701, the limiting block 702, the driving motor 703, the eccentric wheel 704, the fixed plate 705 and the fixed bolt 706 are arranged on the pre-pressing plate 7, the limiting block 702 is arranged on the upper surface of the limiting rod 701, a telescopic structure is formed between the pre-pressing plate 7 and the hydraulic cylinder 6, and the pre-pressing plate 7 can be driven to vertically move through the arranged hydraulic cylinder 6, so that the fiber plate is pre-pressed; two driving motors 703 are installed in the prepressing plate 7, eccentric wheels 704 are arranged on output shafts of the two driving motors 703, fixing plates 705 are arranged on one sides of the two driving motors 703, fixing bolts 706 are installed in the fixing plates 705, the driving motors 703 are detachably connected with the prepressing plate 7 through the fixing plates 705 and the fixing bolts 706, rotating structures are formed between the eccentric wheels 704 and the driving motors 703, and the eccentric wheels 704 can be driven to rotate through the driving motors 703 arranged in the prepressing plate 7, so that certain vibration force is generated by the prepressing plate 7, fiber mixtures in the fiber plates are evenly dispersed, and the processing quality of the fiber plates is improved.

From the above, it can be seen that:

the utility model aims at the technical problems that: in the prior art, the pre-pressing device often needs to disperse fiber mixture in the pre-pressing process, and when the fiber mixture is unevenly dispersed, the quality of the plate is poor; the technical scheme of each embodiment is adopted. Meanwhile, the implementation process of the technical scheme is that

In summary, when the prepressing device for processing the medium density fiberboard is used, firstly, the device frame 1 is placed at a proper position, when the fiberboard is processed, the feeding motor 2 arranged on the device frame 1 drives the screw rod 201 to rotate, under the cooperation of the guide rod 203, the screw rod 201 rotates to drive the movable block 202 in threaded connection to horizontally move, when the movable block 202 moves, the movable block 202 is fixedly connected with the clamping mechanism 3, the clamping mechanism 3 is driven to move rightwards, the connecting groove 204 arranged can ensure the normal movement of the movable block 202, and the guide block 206 arranged on the clamping mechanism 3 can play a role of guiding under the cooperation of the limiting plate 205, so that the condition that the clamping mechanism 3 is deviated during movement can be effectively reduced, when the clamping mechanism 3 moves to the outside, the fiberboard requiring prepressing is placed on the clamping mechanism 3, the feeding motor 2 drives the screw rod 201 to reversely rotate, so that the clamping mechanism 3 is moved into the device, when the clamping mechanism 3 is reset, two fixing pieces 307 are arranged on the inner wall of the fixed side plate 301, when two movable pieces 306 are reset and respectively contacted with the two fixing pieces 307, as the movable pieces 306 and the fixing pieces 307 are of wedge-shaped structures, the movable pieces 306 can drive the connecting rod 304 to move, the connecting rod 304 pushes the clamping plate 302 to move when moving, the protective rubber cushion 303 on the clamping plate 302 clamps and limits the fiber plate placed on the clamping mechanism 3, meanwhile, the tension spring 305 is pulled to move when the clamping plate 302 moves, thus the fiber plate can be prevented from being deviated when being pre-pressed, the clamping plate 302 is not required to be driven by an additional driving mechanism, the practicability is strong, through the heating pipe 308 arranged in the clamping mechanism 3, heating wire 309 starts, can heat heating pipe 308, thereby heat the operation to the fibreboard of centre gripping on clamping mechanism 3, fixed mounting panel 5 on the bracing piece 4, through pneumatic cylinder 6 on mounting panel 5, drive prepressing plate 7 and carry out vertical motion, prepressing plate 7 moves to the fibreboard of centre gripping, thereby prepressing operation is carried out to the fibreboard, the gag lever post 701 and the stopper 702 of setting can play the spacing effect of direction, send the skew when avoiding prepressing plate 7 motion, and through the pressure sensor 310 that sets up on clamping mechanism 3, can detect the pressure that prepressing plate 7 applyed the fibreboard, pressure sensor 310 sends the data that detects to the singlechip, handle the back through the singlechip, send to display screen 8 through the wire, make display screen 8 can show the pressure to the fibreboard pre-compaction, be convenient for the staff observes, avoid the pressure too big or undersize and influence the pre-compaction effect, and through the driving motor 703 that sets up in the prepressing plate 7, can drive eccentric wheel 704 rotate, make plate 7 produce certain vibrating force, fibre mixture in the messenger's fibreboard disperses quality, improve the even dispersion, it is convenient to dismantle 703 to drive down the fixed motor 706 on the fixed motor, the fixing 706, the bolt 703 can be changed conveniently.

Through the arrangement, the utility model can solve the technical problems, and simultaneously realize the following technical effects:

according to the utility model, the screw rod 201 can be driven to rotate through the arranged feeding motor 2, and the movable block 202 horizontally moves under the cooperation of the guide rod 203, so that the clamping mechanism 3 is driven to move, a worker can conveniently take down a processed fiberboard or place the fiberboard to be processed, and the guide function can be realized through the arranged guide block 206 and the limiting plate 205, so that the deviation of the clamping mechanism 3 during movement is avoided;

according to the utility model, through the movable piece 306 arranged on the connecting rod 304, when the movable piece 306 is contacted with the fixed piece 307, the clamping plates 302 can be pushed to move, so that the two clamping plates 302 are mutually close to clamp and limit the fiberboard placed on the clamping mechanism 3, the fiberboard is prevented from being offset during prepressing, a driving mechanism is not required to be additionally added, the practicability is high, and when the movable piece 306 is separated from the fixed piece 307, the clamping plates 302 can be pulled to reset under the action of the tension springs 305, so that the processed fiberboard can be conveniently taken down;

according to the utility model, through the heating pipe 308 arranged in the clamping mechanism 3, the clamping mechanism 3 can be heated under the cooperation of the heating wire 309, so that the fiberboard is heated, the prepressing is convenient, the pressure sensor 310 can detect the pressure born by the fiberboard, and the pressure is displayed through the display screen 8, so that the observation of staff is convenient;

according to the utility model, through the hydraulic cylinder 6, the prepressing plate 7 can be driven to vertically move, so that the fiberboard is prepressed; through the driving motor 703 that sets up in the prepressing plate 7, can drive the eccentric wheel 704 and rotate for prepressing plate 7 produces certain vibrating force, makes the even dispersion of the fibre mixture in the fibreboard, improves the processingquality of fibreboard.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

Claims

1. The utility model provides a pre-compaction device is used in processing of medium density fiberboard, includes device frame (1), with install pay-off motor (2) in device frame (1) left side, its characterized in that: the device comprises a device frame (1), wherein a clamping mechanism (3) is arranged in the device frame (1), four supporting rods (4) are symmetrically arranged on the upper surface of the device frame (1), mounting plates (5) are fixed on the upper surfaces of the four supporting rods (4), a hydraulic cylinder (6) is mounted on the upper surface of each mounting plate (5), a pre-pressing plate (7) is connected with the output end of each hydraulic cylinder (6), a display screen (8) is mounted on the outer wall of the device frame (1), and the display screen (8) is connected with the device frame (1) through bolts;

the feeding device is characterized in that a screw rod (201), a movable block (202), guide rods (203), connecting grooves (204), limiting plates (205) and guide blocks (206) are arranged at the output end of the feeding motor (2), the outer surface of the screw rod (201) is connected with the movable block (202), one side of the movable block (202) is connected with the guide rods (203), the connecting grooves (204) are connected above the movable block (202), two guide blocks (206) are symmetrically arranged on the lower surface of the clamping mechanism (3), and the lower ends of the two guide blocks (206) are connected with the limiting plates (205);

a rotating structure is formed between the screw rod (201) and the feeding motor (2), the screw rod (201) penetrates into the movable block (202), the clamping mechanism (3) forms a sliding structure with the device frame (1) through the guide block (206) and the limiting plate (205), and the movable block (202) is fixedly connected with the clamping mechanism (3);

the clamping mechanism (3) comprises a fixed side plate (301), clamping plates (302), protective rubber mats (303), connecting rods (304), tension springs (305), movable pieces (306), fixing pieces (307), heating pipes (308), heating wires (309) and pressure sensors (310), wherein two connecting rods (304) are symmetrically connected inside the fixed side plate (301), one ends of the two connecting rods (304) are respectively fixed with the clamping plates (302), the outer walls of the clamping plates (302) are provided with the protective rubber mats (303), one sides of the two connecting rods (304) are respectively provided with the tension springs (305), the other ends of the two connecting rods (304) are respectively connected with the movable pieces (306), and one side of each movable piece (306) is provided with the fixing piece (307);

the protection rubber pad (303) and the clamping plate (302) are of an integral fixing structure, the clamping plate (302) and the fixing side plate (301) form an elastic telescopic structure through the connecting rod (304) and the tension spring (305), the movable piece (306) is fixedly connected with the connecting rod (304), and meanwhile the connecting rod (304) and the fixing piece (307) are matched with each other.

2. The prepressing device for medium density fiberboard processing as set forth in claim 1, wherein: the upper surface of clamping mechanism (3) is provided with pressure sensor (310), the inside equidistance of clamping mechanism (3) is provided with a plurality of heating pipes (308), the inside of heating pipe (308) is provided with heating wire (309).

3. The prepressing device for medium density fiberboard processing according to claim 2, characterized in that: the pressure sensor (310) is connected with the clamping mechanism (3) through screws, and the heating wire (309) and the heating pipe (308) are of an integrated fixing structure.

4. The prepressing device for medium density fiberboard processing as set forth in claim 1, wherein: be equipped with gag lever post (701), stopper (702), driving motor (703), eccentric wheel (704), fixed plate (705) and fixing bolt (706) on pre-compaction board (7), the upper surface of gag lever post (701) is provided with stopper (702), constitute extending structure between pre-compaction board (7) and pneumatic cylinder (6).

5. The prepressing device for medium density fiberboard processing as defined in claim 4, wherein: two driving motors (703) are arranged in the pre-pressing plate (7), eccentric wheels (704) are arranged on output shafts of the driving motors (703), fixing plates (705) are arranged on one sides of the driving motors (703), and fixing bolts (706) are arranged in the fixing plates (705).

6. The prepressing device for medium density fiberboard processing as defined in claim 5, wherein: the driving motor (703) is detachably connected with the pre-pressing plate (7) through a fixing plate (705) and a fixing bolt (706), and a rotating structure is formed between the eccentric wheel (704) and the driving motor (703).