CN216372512U - Fixed length cutting device of PVC foaming board - Google Patents

Abstract

The utility model discloses a fixed-length cutting device for a PVC foam board, which comprises a conveying frame and a frame driving mechanism for driving the conveying frame to move; the conveying frame comprises a cutting platform, a cutting mechanism and a a pressing plate mechanism; the cutting mechanism includes a knife seat, a cutting blade disposed on the knife seat, a rolling mechanism disposed on the knife seat, and a first drive mechanism for driving the knife seat to rise and fall; on the conveying frame A second driving mechanism for driving the knife seat to move horizontally is provided; the rolling mechanism includes a mounting tube and a ball set at the opening of the upper end of the mounting tube. In the utility model, a rolling mechanism including balls is arranged on the liftable knife seat, and the rolling mechanism can also move with the cutting blade when the fixed-length cutting operation is performed, so that the balls facing the incision of the PVC foam board can be rolled. The lower surface of the plate is pressed, so that the part of the PVC foam plate extruded downward by the cutting blade is compacted and flattened, so as to avoid the formation of burrs on the lower parts of the two sides of the foam plate.

Description

A fixed-length cutting device for PVC foam board

technical field

The utility model relates to the technical field of PVC foam board production, in particular to a fixed-length cutting device for PVC foam boards.

Background technique

After the PVC foam board is formed and cooled, according to the required length and width of the foam board product, the foam board needs to be cut to fixed width and length.

When the foamed board is cut to length, the cutting blade is usually used to cut the foamed board along the width direction of the foamed board. When the cutting blade is cutting, the part where the surface of the foam board is in contact with the cutting blade will be squeezed by the cutting blade, especially the foam board is affected by the characteristics of the material itself, the lower surface of the foam board and the cutting blade The contact part of the blade will be extruded downward. After the contact part is cut by the cutting blade to form an incision, since there is no support on the lower surface of the foam board, the lower parts of the two sides of the foam board after fixed length cutting are prone to appear. The condition of burrs (steps) affects the quality of the PVC foam board.

It can be seen that the existing technology still needs to be improved and improved.

Utility model content

In view of the deficiencies of the above-mentioned prior art, the purpose of this utility model is to provide a fixed-length cutting device for a PVC foam board, which aims to solve the problem of foaming after the PVC foam board is cut to a fixed length. The lower part of both sides of the board is prone to burrs.

In order to achieve the above object, the utility model has adopted the following technical solutions:

A fixed-length cutting device for PVC foam board, comprising a conveying frame and a frame driving mechanism for driving the conveying frame to move; the conveying frame includes a cutting platform, a cutting mechanism and a pressing plate mechanism; The cutting platform is used to support the PVC foam board to be cut; the pressing plate mechanism is used to press the PVC foam board on the cutting platform when cutting the PVC foam board; the cutting mechanism includes a knife seat, a cutting blade arranged on the tool seat, a rolling mechanism arranged on the tool seat, and a first driving mechanism for driving the lifting and lowering of the tool seat; the conveying frame is provided with a first driving mechanism for driving the horizontal movement of the Two driving mechanisms; the cutting platform is provided with a cutting groove suitable for the cutting blade and the rolling mechanism to penetrate upwards; the rolling mechanism includes a mounting pipe and a ball set at the opening of the upper end of the mounting pipe; the rolling ball It is located just below the cutout on the lower surface of the PVC foam board, and the ball is used to roll the lower surface of the PVC foam board.

In the fixed-length cutting device for PVC foam board, the cutting blade includes a first cutting blade and a second cutting blade arranged on the same straight line; the first cutting blade is used for cutting the PVC foam. The foam board is initially cut, and the cutting depth of the first cutting blade is lower than the thickness of the PVC foam board.

In the PVC foam board fixed-length cutting device, the knife seat includes a first seat plate and a second seat plate with the same shape; the contact surface of the first seat plate and the second seat plate is provided with Multiple cutting blade positioning grooves.

In the fixed-length cutting device of the PVC foam board, the inside of the first seat plate is provided with a magnet for adsorbing the cutting blade.

The fixed-length cutting device for PVC foam board further includes a first base; the conveying frame is slidably arranged on the first base; the frame driving mechanism is arranged on the conveying frame, and the frame is slidably arranged on the first base; The output shaft of the driving mechanism is provided with a gear; the first base is provided with a rack along the conveying direction of the PVC foam board; the gear is meshed with the rack.

In the PVC foam board fixed-length cutting device, the cutting mechanism further includes a bottom plate; the first driving mechanism is a hydraulic device; the hydraulic device includes a hydraulic cylinder and a piston rod, and the hydraulic device is fixed At the bottom of the bottom plate; the protruding end of the piston rod is connected to the knife seat after passing through the bottom plate upward.

In the PVC foam board fixed-length cutting device, the conveying frame further comprises a second base; the bottom plate is slidably arranged on the second base; a transmission mechanism is arranged on the second driving mechanism; The transmission mechanism includes two sprocket sets and a transmission chain wound on the sprocket sets; the sprocket sets are respectively rotatably arranged on the left and right sides of the second base, and the sprocket set includes an upper sprocket and a lower sprocket. sprockets; the upper or lower sprockets of one of the sprocket groups are arranged on the output shaft of the second drive mechanism; the transmission chain is parallel to the width direction of the PVC foam board, and the two ends of the transmission chain are respectively Attached to both sides of the base plate.

In the fixed-length cutting device for PVC foam board, a sliding seat is arranged on the extending end of the piston rod, and the knife seat is arranged on the sliding seat; The guide plate on the bottom plate is provided with a guide bar matched with the sliding seat.

In the fixed-length cutting device for the PVC foam board, the number of guide bars arranged on the guide plate is two.

In the fixed-length cutting device of the PVC foam board, the pressing plate mechanism includes a pressing plate and a pressing plate driving mechanism for driving the pressing plate to rise and fall; above the cutting platform.

Beneficial effects:

The utility model provides a fixed-length cutting device for a PVC foam board. By arranging a rolling mechanism including balls on a liftable knife base, the rolling mechanism can also follow the cutting when the fixed-length cutting operation is performed. The blade moves, so that the ball facing the incision of the PVC foam board rolls the lower surface of the board, so that the part of the PVC foam board that is extruded downward by the cutting blade is compacted and flattened, avoiding the need for two PVC foam boards. The formation of burrs on the lower side and improve the quality of PVC foam board.

Description of drawings

Fig. 1 is a structural schematic diagram 1 of a fixed-length cutting device for PVC foam board provided by the utility model.

FIG. 2 is a second structural schematic diagram of a fixed-length cutting device for PVC foam board provided by the utility model.

FIG. 3 is a third structural schematic diagram of a fixed-length cutting device for a PVC foam board provided by the utility model.

FIG. 4 is an enlarged view of part A in FIG. 3 .

FIG. 5 is a schematic diagram 1 of the installation of the cutting mechanism.

FIG. 6 is a second schematic diagram of the installation of the cutting mechanism.

FIG. 7 is a schematic structural diagram of the cutting mechanism.

FIG. 8 is a schematic view of the structure of the tool holder.

FIG. 9 is a schematic structural diagram of the first seat plate.

Description of main component symbols:

1-conveying frame; 11-transmission roller group; 12-cutting platform; 13-cutting mechanism; 131-knife seat; 131a-first seat plate; 131b-second seat plate; 132-cutting blade; 132a - first cutting blade; 132b - second cutting blade; 133 - first drive mechanism; 134 - mounting tube; 135 - ball; 136 - bottom plate; 137 - sliding seat; 138 - guide bar; 14-pressing plate mechanism; 141-pressing plate; 142-pressing plate driving mechanism; 143-upper beam body; 144-lower beam body; 15-second base; 16-side plate; 17-transmission mechanism; 171-sprocket group; 172 - drive chain; 18 - guide rod;

2-frame driving mechanism; 3-second driving mechanism; 4-cutting groove; 5-cutting blade positioning groove; 6-first base; 7-slide rail; 8-gear; 9-rack; 10-slide body.

Detailed ways

The utility model provides a fixed-length cutting device for PVC foam board. In order to make the purpose, technical scheme and effect of the utility model clearer and clearer, the utility model is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

As shown in Fig. 3 and Fig. 4, the utility model provides a fixed-length cutting device for PVC foam board, including a conveying frame 1 and a frame driving mechanism 2 for driving the conveying frame 1 to move. The fixed-length cutting device of the foamed board can be set downstream of the fixed-width cutting device of the foamed board.

As shown in FIG. 1 and FIG. 3 , further, the conveying frame 1 includes a drive roller group 11 , a cutting platform 12 , a cutting mechanism 13 and a pressing plate mechanism 14 .

The drive roller group 11 includes a plurality of drive rollers. After the foamed board is cut to a fixed width, the foamed board continues to be transported under the action of the drive rollers (the power of the foamed board to move forward comes from the PVC foamed board). The tractor of the production system, the tractor will push the foam board forward).

Wherein, the cutting platform 12 is used to support the foam board to be cut, and the cutting platform 12 is arranged between the transmission rollers 11 , and the table top of the cutting platform 12 should be in line with the conveying surface of the transmission rollers 11 , etc. In this way, by means of the drive roller set 11, the fixed-width cut foam board can be transported to the table top of the cutting platform 12, and after the foam board is cut to a fixed length, it can be transported to the next channel through the drive roll set 11. On the device of the process (such as a palletizing table).

Wherein, the pressing plate mechanism 14 is used for pressing the foamed plate on the cutting platform 12 when cutting the foamed plate.

As shown in FIG. 5 to FIG. 7 , the cutting mechanism 13 includes a knife seat 131 , a cutting blade 132 disposed on the knife seat 131 , a rolling mechanism disposed on the knife seat 131 , and a tool for driving the knife seat 131 lifts the first drive mechanism 133 .

Specifically, the knife seat 131 can move up and down under the action of the first driving mechanism 133 . When the cutting blade 132 is arranged on the knife seat 131 , the knife seat 131 can drive the cutting blade 132 to pass upward through the cutting platform 12 . Furthermore, when the pressing plate mechanism 14 presses the foamed plate on the cutting platform 12, the cutting blade 132 can act on the foamed plate. In addition, the knife seat 131 can also be driven by the second driving mechanism 3 arranged on the conveying frame 1. When the second driving mechanism 3 is working, the knife seat 131 can reciprocate along the width direction of the foam board, With the cooperation of the first driving mechanism 133 and the second driving mechanism 3, the cutting blade 132 can move along the width direction of the foamed board after passing upward through the cutting platform 12, thereby realizing the fixed-length cutting of the foamed board (foamed board). The length of the board is the length of the board after two cuts by the cutting blade 132).

Specifically, the rolling mechanism is arranged at a position on the same line as the cutting blade 132 , and the rolling mechanism includes a mounting tube 134 and a ball 135 provided at the opening of the upper end of the mounting tube 134 . The cutting platform 12 is provided with a cutting groove 4 suitable for the cutting blade 132 and the rolling mechanism to penetrate upward. The position of the rolling mechanism on the knife seat 131 is lower than the cutting blade 132. When the cutting blade 132 passes upward through the cutting platform 12 and cuts the foam board, the rolling mechanism is located in the groove 4, And the balls 135 press up against the lower surface of the foamed plate. As the cutting blade 132 cuts the foamed board to a certain length, the rolling mechanism can also move along the width direction of the foamed board, so that the ball 135 facing the incision of the PVC foamed board rolls the lower surface of the foamed board (The incision is formed after the cutting blade 132 cuts the foamed board, so the setting of the rolling mechanism needs to meet the operation mode of cutting first and then rolling), and the foamed board is rolled by the cutting blade 132 through the rolling of the balls 135. The downwardly extruded part is compacted and flattened to avoid the formation of burrs on both sides of the foam board.

In addition, since the rotation direction of the balls 135 is random, when the balls 135 are rolled, the surface of the rolled object can be evenly stressed, so as to ensure that the part of the foam board extruded downward by the cutting blade 132 can be removed. It is compacted and flattened without chipping of the board.

As shown in FIG. 3 and FIG. 4 , further, when the cutting blade 132 is cutting to a fixed length, the frame driving mechanism 2 drives the conveying frame 1 to move as a whole in the transport direction of the foam board, thereby ensuring the cutting During the cutting operation, even if the foamed board is pressed by the pressing plate mechanism 14, the foamed board can be transported forward without affecting the normal ejection of the extruder.

As shown in FIG. 7 and FIG. 8 , further, the cutting blade 132 includes a first cutting blade 132a and a second cutting blade 132b which are arranged on the same straight line. The position of the first cutting blade 132a on the blade seat 131 is lower than that of the second cutting blade 132b, and the first cutting blade 132a is used for preliminary cutting of the foam board. When the knife seat 131 moves to perform the cutting operation, the first cutting blade 132a first acts on the foamed board, and the cutting depth of the first cutting blade 132a is lower than the thickness of the foamed board, forming a certain cutting depth in the foamed board Afterwards, the second cutting blade 132b further cuts. When the thickness of the foamed board is thick, the aforementioned cutting method can avoid the problem of deformation of the blade in the process of cutting the foamed board at one time.

Since the cutting blade 132 is not deformed when cutting the foamed board, the cutting quality of the foamed board can be ensured, and in addition, the incision formed by cutting the foamed board can always be parallel to the width direction of the foamed board. The balls 135 can always act on the incision on the lower surface of the foamed board, so as to ensure that the burrs generated by the fixed-length cutting of the foamed board can be eliminated.

As shown in FIG. 8 and FIG. 9 , further, the cutter seat 131 includes a first seat plate 131a and a second seat plate 131b having the same shape, and the first seat plate 131a and the second seat plate 131b can be connected by a screw rod. Assemble with bolts.

In addition, a plurality of cutting blade positioning grooves 5 are provided on the contact surfaces of the first seat plate 131a and the second seat plate 131b. The cutting blade positioning groove 5 is used for positioning the cutting blade 132, and the shape of the cutting blade positioning groove 5 can be matched with the blade body of the cutting blade 132. When the cutting blade 132 is installed, the blade body of the cutting blade 132 is placed Cutting blade positioning groove 5.

The utility model utilizes the cutting blade positioning groove 5 to locate the cutting blade 132, which can realize the precise installation of the cutting blade 132 while avoiding the deformation of the cutting blade 132, and can also improve the cutting precision of the foam board.

Further, the first seat plate 131a is provided with a magnet (not shown in the drawings) for attracting the cutting blade 132. After the cutting blade 132 is placed on the positioning groove of the cutting blade 132, the magnet can attract and cut the cutting blade 132. The blade 132 avoids the problem of movement of the cutting blade 132 when the blade base 131 is assembled, thereby ensuring the cutting quality of the foamed board and at the same time ensuring that the burrs generated by the fixed-length cutting of the foamed board can be eliminated.

As shown in FIG. 1 , FIG. 3 and FIG. 4 , further, the device for cutting to length of the PVC foam board further includes a first base 6 . The first base 6 is provided with two sliding rails 7 along the transportation direction of the 141 foam board, the conveying frame 1 is slidably connected with the two sliding rails 7, and the frame driving mechanism 2 is arranged on the conveying frame. 1 on. Specifically, the frame driving mechanism 2 can be a forward and reverse rotation motor, and the output shaft of the driving mechanism is provided with a gear 8; in addition, in order to enable the conveying frame 1 to be able to move along the transport direction of the foam board when the forward and reverse rotation motor works In this utility model, the first base 6 is provided with a rack 9 along the conveying direction of the PVC foam board, and the rack 9 is meshed with the gear 8, so that when the output shaft of the forward and reverse motor rotates, the transmission The rack 1 will move relatively lower than the first base 6 so as to realize the change of the position of the conveying rack 1 .

The present invention utilizes the interaction of the gear 8 and the rack 9 to realize the movement of the conveying frame 1 , and the frame driving mechanism 2 can be directly arranged at the bottom of the conveying frame 1 , making full use of the already existing conveying frame 1 . With settings, the footprint of the device can be reduced.

Further, the sliding rail 7 is a T-shaped sliding rail, and the conveying frame 1 further includes a second base 15, and the bottom of the second base 15 is provided with a sliding body that cooperates with the protrusion of the T-shaped sliding rail. 10. When the conveyor frame 1 moves, the protrusions of the T-shaped slide rails can limit the position of the sliding body 10, and since the racks 9 are arranged along the transportation direction of the foam board, the T-shaped slide rails and the toothed The joint action of the strips 9 can make the conveyor frame 1 always move along the conveying direction of the foamed board, so the slot 4 will not deviate from the correct position, thus ensuring that the foamed board can be cut correctly.

As shown in FIG. 5 to FIG. 7 , further, the cutting mechanism 13 further includes a bottom plate 136 , the first driving mechanism 133 is fixed on the bottom of the bottom plate 136 , and the first driving mechanism 133 is a hydraulic device. The hydraulic device includes a hydraulic rod and a piston rod, and the protruding end of the piston rod extends upward from the bottom plate 136 and is connected to the tool seat 131. When the hydraulic device is working, the tool seat 131 can be moved up and down through the telescopic operation of the piston rod.

Further, the protruding end of the piston rod is connected with a sliding seat 137 , and the knife seat 131 is installed on the sliding seat 137 . When the hydraulic device works, under the traction of the piston rod, both sides of the sliding seat 137 move up and down along the guide plate 139, and the guide plate 139 is provided with a guide bar 138 that cooperates with the sliding seat 137 (the guide bar 138 is perpendicular to the horizontal plane) , when the sliding seat 137 moves, the guide bar 138 can limit the sliding seat 137 to keep the sliding seat 137 in a balanced state during the moving process, the corresponding knife seat 131 can also keep the balance when moving, and the rolling mechanism can also It is always in a vertical relationship with the horizontal plane, so that in the process of cutting the foam board by the cutting blade 132, it can ensure that the balls 135 correctly roll the lower surface of the foam board, so that the burrs generated by cutting the foam board can be fully eliminated.

Further, the number of the guide bars 138 arranged on the guide plate 139 is two, and the arrangement of the plurality of guide bars 138 can strengthen the limiting effect on the sliding seat 137. The presence of the strip 138 prevents the carriage 137 from moving further.

Further, the conveying frame 1 further includes a second base 15 and two side plates 16 arranged in parallel, the side plates 16 are vertically arranged on the second base 15, and the bottom plate 136 extends along the The width direction of the foam board is slidably arranged on the second base 15 .

As shown in FIG. 1 and FIG. 6 , further, a transmission mechanism 17 is provided on the second driving mechanism 3 for driving the knife seat 131 to move, and the transmission mechanism 17 may also be a forward and reverse rotation motor. Specifically, the transmission mechanism 17 includes two sprocket sets 171 and a transmission chain 172 wound around the sprocket sets 171 . The sprocket sets 171 are respectively arranged on the outer sides of the two side plates 16, and the sprocket sets 171 include an upper sprocket and a lower sprocket, and the transmission chain 172 is parallel to the width direction of the foam plate, and drives the Both ends of the chain 172 are respectively connected to both sides of the bottom plate 136 (when the transmission chain 172 is wound around the sprocket, the side plate 16 is provided with a through hole suitable for the transmission chain 172 to pass through). In order to enable the transmission chain 172 to move when the forward and reverse motors work, the upper or lower sprockets of one of the sprocket groups 171 are arranged on the output shaft of the forward and reverse motors, so that when the output shaft of the forward and reverse motors rotates , the sprocket set on the output shaft of the motor can rotate, so that the transmission chain 172 wound on the sprocket group 171 can move. Since the transmission chain 172 is parallel to the width direction of the foam plate, after the transmission chain 172 moves back and forth under the action of the forward and reverse motors, the bottom plate 136 can slide back and forth along the width direction of the foam plate. Correspondingly, the bottom plate 136 is fixed on the bottom plate. The knife seat 131 above the 136 also moves with the bottom plate 136, and drives the cutting blade 132 to cut the foamed board along the width direction of the foamed board.

Through the cooperation of the first driving mechanism 133 and the second driving mechanism 3 in the present invention, when the cutting operation is in progress, the cutting blade 132 can be cut upward into the foamed board, and at the same time, the cutting blade 132 can be made to act on the back of the foamed board. Move along the width direction of the PVC foam board, so as to realize the fixed-length cutting of the foam board.

As shown in FIG. 5 , further, two guide rods 18 are arranged on the second base 15 along the width direction of the foam board, and the bottom plate 136 is slidably arranged on the guide rods 18 . The setting of the guide rods 18 can not only limit the movement of the bottom plate 136, thereby ensuring that the bottom plate 136 always moves along the width direction of the foam board, but also can make the bottom plate 136 move smoothly, and because the knife seat 131 can move smoothly, Therefore, the cutting blade 132 can ensure higher cutting precision.

As shown in FIGS. 1 to 3 , further, the pressing plate mechanism 14 includes a pressing plate 141 and a pressing plate driving mechanism 142 for driving the pressing plate 141 to ascend and descend.

The pressing plate is arranged along the width direction of the PVC foaming plate, and the pressing plate can move up or down under the action of the pressing plate driving mechanism 142. When the pressing plate moves downward, the pressing plate presses the foaming plate, so that the foaming plate is in the It does not move while being cropped.

The upper beam body 143 for installing the hydraulic device is erected above the cutting platform 12. The upper beam body 143 can be arranged between the two side plates 16. After the hydraulic device is arranged on the upper beam body 143, the hydraulic device The extending end of the piston rod passes downward through the upper beam body 143 and is connected with the pressure plate. Meanwhile, in order to ensure that the pressure plate can move up and down in a balanced manner, there can be multiple hydraulic devices, which are symmetrically arranged on the upper beam body 143 .

Further, the number of the pressing plates is 2; the pressing plate mechanism 14 also includes a lower beam body 144 connected with the piston rod of the hydraulic device, the lower beam body 144 is located below the upper beam body 143, and the two pressing plates are arranged on the lower beam body 144. The lower part of the beam body 144 .

When the two pressing plates are arranged at the lower part of the lower beam body 144, the slot 4 is relatively located between the two pressing plates, so that when cutting the foam board, the two pressing plates can press the plates on both sides of the incision respectively, so that the The plates on both sides of the incision will not move at will before the plates are separated, ensuring that the foamed plate can be cut correctly, and the setting of the two pressing plates can also prevent the workshop personnel from contacting the cutting blade 132 during operation, which plays a protective role. effect.

It should be noted that the fixed-length cutting device of the PVC foam board provided by the present invention is an automatic cutting device, and the automatic operation can be realized by an automatic control system and a sensor with a board detection function.

To sum up, the utility model provides a fixed-length cutting device for PVC foam board. By arranging a rolling mechanism containing balls on the liftable knife seat, when the fixed-length cutting operation is performed, the cutting operation is carried out with the cutting operation. The cutting blade cuts the PVC foam board, and the rolling mechanism can also move with the cutting blade, so that the ball facing the incision of the PVC foam board rolls the lower surface of the board, so that the PVC foam board is moved toward the cutting blade by the cutting blade. The lower extruded part is compacted and flattened, which avoids the formation of burrs on both sides of the PVC foam board and improves the quality of the PVC foam board.

It can be understood that, for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions of the present utility model and the utility model concept thereof, and all these changes or replacements shall belong to the appended claims of the present utility model. protected range.

Claims (10)

1. The fixed-length cutting device for the PVC foaming board is characterized by comprising a conveying rack and a rack driving mechanism for driving the conveying rack to move; the conveying rack comprises a cutting platform, a cutting mechanism and a pressing plate mechanism; the cutting platform is used for supporting the PVC foaming plate to be cut; the pressing plate mechanism is used for pressing the PVC foaming plate on the cutting platform when the PVC foaming plate is cut; the cutting mechanism comprises a cutter holder, a cutting blade arranged on the cutter holder, a rolling mechanism arranged on the cutter holder and a first driving mechanism used for driving the cutter holder to lift; the conveying rack is provided with a second driving mechanism for driving the cutter holder to move horizontally; a cutting groove suitable for the upward penetration of the cutting blade and the rolling mechanism is formed in the cutting platform; the rolling mechanism comprises a mounting pipe and a ball arranged at an opening at the upper end of the mounting pipe; the ball is located under the notch of the lower surface of the PVC foaming plate and used for rolling the lower surface of the PVC foaming plate.

2. The fixed-length cutting device for PVC foam boards according to claim 1, wherein the cutting blades comprise a first cutting blade and a second cutting blade which are arranged on the same straight line; the first cutting blade is used for primarily cutting the PVC foaming plate, and the cutting depth of the first cutting blade is lower than the thickness of the PVC foaming plate.

3. The fixed-length cutting device for the PVC foaming board as claimed in claim 2, wherein the cutter seat comprises a first seat board and a second seat board which are identical in shape; and a plurality of cutting blade positioning grooves are formed in the contact surface of the first seat plate and the second seat plate.

4. The fixed-length cutting device for PVC foam boards according to claim 3, wherein the first seat board is internally provided with a magnet for adsorbing a cutting blade.

5. The fixed-length cutting device for the PVC foam board according to claim 1, further comprising a first base; the conveying rack is arranged on the first base in a sliding mode; the rack driving mechanism is arranged on the conveying rack, and an output shaft of the rack driving mechanism is provided with a gear; a rack is arranged on the first base along the conveying direction of the PVC foaming plate; the gear is meshed with the rack.

6. The fixed-length cutting device for the PVC foam board according to claim 1, wherein the cutting mechanism further comprises a bottom plate; the first driving mechanism is a hydraulic device; the hydraulic device comprises a hydraulic cylinder and a piston rod and is fixedly arranged at the bottom of the bottom plate; the extending end of the piston rod penetrates out of the bottom plate upwards and then is connected with the cutter holder.

7. The cut-to-length device for PVC foam boards according to claim 6, wherein the conveyor frame further comprises a second base; the bottom plate is arranged on the second base in a sliding mode; the second driving mechanism is provided with a transmission mechanism; the transmission mechanism comprises two chain wheel groups and a transmission chain wound on the chain wheel groups; the chain wheel sets are respectively and rotatably arranged on the left side and the right side of the second base and comprise upper chain wheels and lower chain wheels; the upper chain wheel or the lower chain wheel of one of the chain wheel sets is arranged on an output shaft of the second driving mechanism; the transmission chain is parallel to the width direction of the PVC foaming plate, and two ends of the transmission chain are respectively connected with two sides of the bottom plate.

8. The fixed-length cutting device for the PVC foam board as claimed in claim 6, wherein a sliding seat is arranged at the extending end of the piston rod, and the cutter holder is arranged on the sliding seat; the two sides of the sliding seat are movably connected with guide plates arranged on the bottom plate, and guide strips matched with the sliding seat are arranged on the guide plates.

9. A device for cutting PVC foam board according to claim 8, wherein the number of the guide strips arranged on the guide plate is 2.

10. The fixed-length cutting device for the PVC foaming plate as claimed in claim 1, wherein the pressing plate mechanism comprises a pressing plate and a pressing plate driving mechanism for driving the pressing plate to ascend and descend; the pressing plate is arranged along the width direction of the PVC foaming plate, and the pressing plate is movably arranged above the cutting platform.

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