Preparation device for flame-retardant foam thermal insulation material

Abstract

The invention relates to the technical field of thermal insulation material preparation, and discloses a flame-retardant foam thermal insulation material preparation device which comprises a conveying belt and a cutting box, the conveying belt passes through the cutting box, a foam body is arranged on the conveying belt, a track frame is arranged in the cutting box, and a cutting knife and a knife changing assembly are arranged in the track frame. The cutting device comprises a tool changing assembly and two cutting knives, the number of the cutting knives is two, the two cutting knives are distributed in a staggered mode, the tool changing assembly can drive the two cutting knives to move back and forth to cut a foam body, and the tool changing assembly comprises a pushing block, an ejection spring and a sliding block. According to the foam cutting device, the cutting knife is arranged on the foam body and driven by the knife changing assembly to move back and forth to cut the foam body, alternate work can be achieved, the track frame of the cutting knife is L-shaped, the short edge of the cutting knife is inclined, the cutting knife bevels from the side edge of the foam body, the contact area of the cutting knife and the foam body is reduced, and therefore the cutting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation material preparation, in particular to a device for preparing a flame-retardant foam thermal insulation material. Background Art

[0002] Flame-retardant foam insulation materials are widely used in many fields, such as building insulation, electronic equipment packaging, etc. With the continuous development of related industries, higher requirements are put forward for the cutting and processing accuracy, efficiency and reliability of cutting equipment of flame-retardant foam insulation materials. Traditional flame-retardant foam cutting methods and equipment are gradually unable to meet the growing production needs, prompting people to continuously explore and develop more advanced cutting technologies and equipment.

[0003] Common cutting methods include manual cutting and mechanical tool cutting. In manual cutting, the operator uses scissors to cut the foam. This cutting method is extremely inefficient, and the cutting accuracy depends entirely on the operator's skill level, making it difficult to ensure product quality. Mechanical tool cutting generally uses an up and down reciprocating tool for cutting. When this cutting method is used, the tool is likely to drive the foam upward when it is detached from the foam, and the friction between the tool and the foam will increase, making it easy for the tool to get stuck between the foam. Even if the tool is detached from the foam, it will cause the foam to shift position, which can easily lead to an uneven cutting surface the next time the foam is cut, resulting in a high scrap rate and failure to meet the requirements for high efficiency in large-scale production, leading to an extended production cycle and increased production costs. Summary of the invention

[0004] The object of the present invention is to provide a device for preparing a flame retardant foam thermal insulation material to solve the problems raised in the above background technology.

[0005] Technical Solution

[0006] The present invention provides the following technical solution: a flame-retardant foam insulation material preparation device, comprising a conveyor belt and a cutting box, the conveyor belt passes through the cutting box, a foam body is arranged on the conveyor belt, a track frame is arranged in the cutting box, a cutting knife and a knife changing assembly are arranged in the track frame, the number of the cutting knives is two, and the two cutting knives are staggered and distributed, and the knife changing assembly can drive the two cutting knives to move back and forth to cut the foam body, thereby promoting the cutting efficiency of the foam body;

[0007] The knife changing assembly includes a pushing block, a ejection spring and a sliding block. The ejection spring releases pressure to drive the pushing block to eject the sliding block. The sliding block drives the cutting knife to slide in the track frame and cuts from the side of the foam body.

[0008] Preferably, the track frame is provided with a track post, a limit block and an electromagnet, the push block, the ejection spring and the sliding block are all located outside the track post, the limit block is in contact with the sliding block, and the limit post is provided on the push block.

[0009] Preferably, a buffer plate and a buffer cavity are further provided in the track frame, a sliding plate, a buffer spring and a contact block are provided in the buffer cavity, and the buffer plate contacts the sliding plate and is located outside the track column.

[0010] Preferably, a connecting frame is provided at the end of the track frame, and a first connecting tube is provided at the other end of the connecting frame. The first connecting tube, the connecting frame and the track frame are connected to each other. A third extrusion spring and a push rod are provided in the connecting frame, and the push rod is in contact with the limit column through an inclined surface.

[0011] Preferably, a ventilation channel and a connecting block are provided in the first connecting pipe, the connecting block divides the ventilation channel into two parts, second connecting channels are provided on both sides of the connecting block, a toggle block, a stopper and a second extrusion spring are provided in the connecting block, and the toggle block can adjust the stopper to open the second connecting channel.

[0012] Preferably, a motor is provided on the outside of the cutting box, a rotating roller and a connecting mechanism are provided on the motor output shaft, the connecting mechanism is in contact with the toggle block, an extrusion plate, a piston cylinder, a mounting frame and a rotating gear are also provided in the cutting box, the rotating roller is located above the extrusion plate and in contact with the upper part of the extrusion plate, the cutting knife is located below the extrusion plate, and a cutting groove matching the cutting knife is provided below the extrusion plate.

[0013] Preferably, a second connecting pipe is provided at the end of the piston cylinder, the second connecting pipe passes through the mounting frame and is connected with the first connecting pipe, and the tool changing assembly is located in the mounting frame.

[0014] Preferably, a first extrusion spring is arranged on the side of the extrusion plate, a lower sliding column is arranged at the bottom end of the extrusion plate, a gear column is arranged on the outer wall of the installation frame, and the rotating gears are meshedly connected with the lower sliding column and the gear column.

[0015] Preferably, a connecting rod and a piston block are provided on the lower sliding column, and the piston block extends into the piston cylinder. A first connecting channel is provided inside the connecting rod, and the first connecting channel extends into the piston cylinder to enable the piston cylinder and the second connecting pipe to communicate with each other.

[0016] Beneficial Effects

[0017] Compared with the prior art, the present invention provides a flame retardant foam insulation material preparation device, which has the following beneficial effects:

[0018] 1. In the present invention, the track frame of the cutting knife is L-shaped and the shorter side is inclined. The cutting knife starts from the side of the foam body, which avoids the tool getting stuck in the foam when cutting the foam, reduces the contact area between the cutting knife and the foam body, and thus increases the cutting efficiency.

[0019] 2. In the present invention, the use of an oblique cutting method reduces the initial contact area between the cutting knife and the foam body, so that the resistance encountered by the cutting knife when cutting into the foam is relatively small, so that it can cut in and complete the cutting action more quickly, avoid uneven cutting surface, and improve the yield rate.

[0020] 3. In the present invention, two cutting knives are used which are staggered and moved back and forth by a knife changing assembly to cut the foam body. They can work alternately to avoid the problem of low working efficiency of the cutting knives. When a single cutting knife is damaged, the other cutting knife can continue to work, thus ensuring the cutting efficiency of the foam body.

[0021] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0022] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a front view of the overall structure of the present invention;

[0025] Figure 2 It is a rear view of the cutting box of the present invention;

[0026] Figure 3 This is a front internal view of the cutting box of the present invention;

[0027] Figure 4 This is a top view of the interior of the cutting box of the present invention;

[0028] Figure 5 This is a bottom view of the interior of the cutting box of the present invention;

[0029] Figure 6 This is a working diagram of the piston cylinder and the second connecting pipe of the present invention;

[0030] Figure 7 It is the internal diagram of the installation frame of the present invention;

[0031] Figure 8 It is a schematic diagram of the connection between the first connecting pipe and the second connecting pipe of the present invention;

[0032] Fig. 9 It is a schematic diagram of the first connecting pipe, the connecting frame, the track frame and the cutting knife of the present invention;

[0033] Fig.10 The cutting operation of the cutting knife bullet of the present invention is shown in FIG. Figure 1 ;

[0034] Fig.11 The cutting operation of the cutting knife bullet of the present invention is shown in FIG. Figure 2 ;

[0035] Fig.12 This is a working diagram of the cutting knife and buffer plate of the present invention.

[0036] Description of reference numerals:

[0037] In the figure: 1, conveyor belt; 2, cutting box; 3, foam body; 4, motor; 5, extrusion plate; 6, rotating roller; 7, first extrusion spring; 8, piston cylinder; 9, mounting frame; 10, first connecting pipe; 11, cutting knife; 12, sliding column; 13, rotating gear; 14, second connecting pipe; 15, buffer spring; 16, contact block; 17, connecting rod; 18, piston block; 19, first connecting channel; 20, track frame; 21 , connecting frame; 22, track column; 23, connecting mechanism; 24, ventilation channel; 25, connecting block; 26, toggle block; 27, second connecting channel; 28, stop block; 29, second extrusion spring; 30, push rod; 31, third extrusion spring; 32, limit block; 33, push block; 34, ejection spring; 35, electromagnet; 36, limit column; 37, sliding block; 38, buffer plate; 39, buffer chamber; 40, sliding plate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example:

[0040] See also Figure 1 , Figure 2 , Figure 7-Figure 12The present invention provides a technical solution: a flame-retardant foam insulation material preparation device, comprising a conveyor belt 1 and a cutting box 2, the conveyor belt 1 passes through the cutting box 2, a foam body 3 is laid on the conveyor belt 1, a track frame 20 is fixedly installed in the cutting box 2, a cutting knife 11 and a knife changing assembly are arranged in the track frame 20, the number of the cutting knives 11 is two, and the two cutting knives 11 are staggered and distributed, and the knife changing assembly can drive the two cutting knives 11 to move back and forth to cut the foam body 3, thereby promoting the cutting efficiency of the foam body 3;

[0041] The knife changing assembly includes a push block 33, a ejection spring 34 and a sliding block 37. The ejection spring 34 releases pressure to drive the push block 33 to eject the sliding block 37. The sliding block 37 drives the cutting knife 11 to slide in the track frame 20 and cut from the side of the foam body 3.

[0042] In this embodiment, the track column 22, the limit block 32 and the electromagnet 35 are fixedly installed in the track frame 20 respectively, the pushing block 33, the ejection spring 34 and the sliding block 37 are all located on the outside of the track column 22, the limit block 32 is in contact with the sliding block 37, the limit column 36 is movably installed on the pushing block 33, the limit block 32 is separated between the sliding block 37 and the pushing block 33, the shape of the pushing block 33 is convex, and the protruding height of the pushing block 33 is greater than the thickness of the limit block 32, so that the pushing block 33 can drive the sliding block 37 to slide on the track column 22, and at the same time the limit block 32 can prevent the pushing block 33 from moving away from its original position.

[0043] In this embodiment, a buffer plate 38 is movably installed in the track frame 20, and a buffer cavity 39 is opened. A sliding plate 40 and a buffer spring 15 are movably installed in the buffer cavity 39 respectively. The sliding plate 40 and the buffer spring 15 are fixedly connected, and the buffer spring 15 is located on the side of the contact block 16, and the contact block 16 is fixedly installed. The buffer plate 38 contacts the sliding plate 40 and is located on the outside of the track column 22.

[0044] The electromagnet 35 is connected to the contact block 16 through a signal. When the contact block 16 is hit by the sliding plate 40, the contact block 16 will cause the electromagnet 35 to work. When the electromagnet 35 works, it will drive the push block 33 to its original position through the characteristic of opposites attracting each other, and reset it to facilitate the next ejection of the cutting knife 11 and the cutting work.

[0045] When the sliding block 37 drives the cutting knife 11 to slide on the track column 22 and moves to the other end of the track frame 20, the sliding block 37 is subjected to the elastic force of the ejection spring 34, which makes it contact with the buffer plate 38, and the buffer plate 38 contacts the sliding plate 40, prompting the sliding plate 40 to squeeze the buffer spring 15, which can prevent the cutting knife 11 from being hit. At the same time, the buffer spring 15 can also accumulate force for the return of the cutting knife 11, so that the sliding block 37 and the cutting knife 11 return to the initial position, and as the sliding plate 40 moves, it will contact the contact block 16, and the contact block 16 will trigger the electromagnet 35 to work, and the electromagnet 35 will adsorb the push block 33 to the initial position.

[0046] In this embodiment, a connecting frame 21 is fixedly installed at the end of the track frame 20, and a first connecting pipe 10 is fixedly installed at the other end of the connecting frame 21. The first connecting pipe 10, the connecting frame 21 and the track frame 20 are connected to each other. A third extrusion spring 31 and a push rod 30 are movably installed in the connecting frame 21. The push rod 30 and the limiting column 36 are in contact through an inclined surface. The gas from the first connecting pipe 10 will enter the connecting frame 21 and push the push rod 30 in the connecting frame 21, and cause the third extrusion spring 31 to be squeezed. The push rod 30 is squeezed and the limiting column 36 is forced to move outward from the track frame 20 through the inclined surface. The limiting column 36 will separate from the pushing block 33, so that the pushing block 33 is released by the elastic force of the ejection spring 34, and the pushing block 33 begins to move instantly along the track column 22 and hits the sliding block 37, driving the cutting knife 11 to move.

[0047] The shape of the track frame 20 is L-shaped, and the shorter side is inclined. The cutting knife 11 moves on the inclined side to the longer side. During the movement, the cutting knife 11 will start from the side of the foam body 3 to reduce the contact area between the cutting knife 11 and the foam body 3, thereby increasing the cutting efficiency.

[0048] In this embodiment, a ventilation channel 24 is opened in the first connecting pipe 10, and a connecting block 25 is fixedly installed. The connecting block 25 divides the ventilation channel 24 into two parts. A second connecting channel 27 is arranged on both sides of the connecting block 25. A toggle block 26, a stopper 28 and a second extrusion spring 29 are movably installed in the connecting block 25. The toggle block 26 can adjust the stopper 28 to open the second connecting channel 27.

[0049] The motor 4 adopts a forward and reverse motor. When the motor 4 rotates forward and reverse, it will drive the toggle block 26 to rotate forward and reverse. The block 28 can be opened as needed, and the air in the first connecting pipe 10 can be passed into the required ventilation channel 24. At the same time, the block 28 will squeeze the second squeezing spring 29 when it is squeezed by the toggle block 26. When the block 28 loses its squeezing, under the action of the second squeezing spring 29, the block 28 will block the opened second connecting channel 27.

[0050] A connecting mechanism 23 is arranged on the output shaft of the motor 4, and the connecting mechanism 23 includes a transmission shaft and a bevel gear, that is, the motor 4 can drive the toggle block 26 to rotate through the connecting mechanism 23 when working, and the transmission shaft and the bevel gear both adopt existing mature technologies.

[0051] The cutting knife 11 is located inside the cutting box 2 and is not arranged outside, which can effectively prevent the cutting knife 11 from causing accidental damage.

[0052] When in use, the motor 4 drives the toggle block 26 to rotate through the connecting mechanism 23, and the gas in the first connecting pipe 10 will enter the connecting frame 21. The toggle block 26 will drive the block 28 on different sides to move when rotating forward and reversely. When the block 28 on different sides moves, the second connecting channel 27 on different sides will be opened, which can avoid that the two cutting knives 11 will not work at the same time, and the two cutting knives 11 will work alternately to increase the service life of the cutting knives 11. When a single cutting knife 11 is damaged, the other cutting knife 11 continues to work to avoid the reduction of the cutting efficiency of the foam body 3. It can enter the connecting frame 21 through different ventilation channels 24. Entering the connecting frame 21 will make the push rod 30 extend out of the connecting frame 21 and squeeze the third extrusion spring 31. When the push rod 30 moves, the limit column 36 and the push block 33 is separated, and the pushing block 33 releases a huge elastic force under the action of the ejection spring 34, prompting the pushing block 33 to push the sliding block 37 to slide on the track column 22. When the sliding block 37 moves, it will drive the cutting knife 11 to cut the foam body 3 horizontally. When the sliding block 37 and the cutting knife 11 move to the end of the track column 22, the sliding block 37 will contact the buffer plate 38, and the buffer plate 38 will contact the sliding plate 40, prompting the sliding plate 40 to squeeze the buffer spring 15, which can prevent the cutting knife 11 from being hit. At the same time, the buffer spring 15 can also accumulate force for the return of the cutting knife 11, so that the sliding block 37 and the cutting knife 11 return to the initial position, and as the sliding plate 40 moves, it will contact the contact block 16, and the contact block 16 will trigger the electromagnet 35 to work, and the electromagnet 35 will adsorb the pushing block 33 to the initial position.

[0053] The tool changing assembly includes a push block 33, an ejection spring 34, a sliding block 37 and other components. The track column 22, the limit block 32 and the electromagnet 35 are fixedly installed in the track frame 20 respectively. The push block 33, the ejection spring 34 and the sliding block 37 are all located outside the track column 22. The limit block 32 is in contact with the sliding block 37. The limit column 36 is movably installed on the push block 33. The limit block 32 is separated between the sliding block 37 and the push block 33. The shape of the push block 33 is convex, and the protruding height of the push block 33 is greater than the thickness of the limit block 32. This structural design enables the push block 33 to stably drive the sliding block 37 to slide on the track column 22 under the action of the ejection spring 34. At the same time, the limit block 32 can prevent the push block 33 from being separated from the original position, thereby ensuring the accuracy and stability of the tool changing process, so that the cutting knife can work according to the predetermined trajectory and method, and improving the working reliability and cutting accuracy of the device.

[0054] The patent uses two cutting knives 11, and the two cutting knives are staggered and distributed. The knife changing assembly can drive the two cutting knives to move back and forth to cut the foam body 3. The motor 4 drives the toggle block 26 to rotate through the connecting mechanism 23. The gas in the first connecting tube 10 will enter the connecting frame 21. The toggle block 26 will drive the block 28 on different sides to move when it rotates forward and reversely. When the block 28 on different sides moves, the second connecting channel 27 on different sides will be opened, thereby controlling the two cutting knives to work alternately. This design avoids the mutual interference that may be caused by the two cutting knives working at the same time, and when a single cutting knife is working, the other cutting knife is in a ready state. Once the current working cutting knife has a problem or needs to be replaced, the other cutting knife can be put into work immediately, and the cutting process of the foam body will not be interrupted. High production efficiency is maintained continuously, and downtime caused by tool problems is reduced, which improves the cutting efficiency and production continuity of the device as a whole.

[0055] At the same time, compared with the situation where a single tool works continuously, this alternating working mode can distribute the tool's workload more evenly, reduce the tool's working time under high load, help extend the tool's overall service life, and reduce the frequency and cost of tool replacement.

[0056] A buffer plate 38 is movably installed in the track frame 20, and a buffer cavity 39 is provided, in which a sliding plate 40 and a buffer spring 15 are movably installed. When the sliding block 37 drives the cutting knife 11 to slide on the track column 22 and move to the other end of the track frame 20, the sliding block 37 is subjected to the elastic force of the ejection spring 34, which makes it contact with the buffer plate 38, and the buffer plate 38 contacts with the sliding plate 40, prompting the sliding plate 40 to squeeze the buffer spring 15. This buffering process can effectively absorb the impact force of the cutting knife when it moves to the end of the track, preventing the cutting knife from being damaged by severe impact, thereby protecting the cutting knife, reducing the risk of wear and damage caused by collision, and extending the service life of the cutting knife.

[0057] See also Figure 1-Figure 6 The present invention provides a technical solution: in this embodiment, a motor 4 is fixedly installed on the outside of the cutting box 2, a rotating roller 6 is fixedly installed on the output shaft of the motor 4, a connecting mechanism 23 is in contact with a toggle block 26, an extrusion plate 5, an installation frame 9 and a rotating gear 13 are also movably installed in the cutting box 2, a piston cylinder 8 is fixedly installed, the rotating roller 6 is located above the extrusion plate 5 and in contact with the extrusion plate 5, a cutting knife 11 is located below the extrusion plate 5, and a cutting groove matching the cutting knife 11 is opened below the extrusion plate 5;

[0058] In this embodiment, a second connecting tube 14 is fixedly connected to the end of the piston cylinder 8 . The second connecting tube 14 passes through the mounting frame 9 and is connected to the first connecting tube 10 . The tool changing assembly is located in the mounting frame 9 .

[0059] In this embodiment, a first extrusion spring 7 is movably installed on the side of the extrusion plate 5, a lower sliding column 12 is fixedly installed at the bottom of the extrusion plate 5, a gear column is fixedly installed on the outer wall of the installation frame 9, and the rotating gear 13 is meshed and connected with the lower sliding column 12 and the gear column.

[0060] When the motor 4 rotates, it will drive the rotating roller 6 to rotate. When the rotating roller 6 rotates, it will drive the extrusion plate 5 to move downward, and at the same time drive the first extrusion spring 7 to stretch. When the extrusion plate 5 moves downward, it will drive the lower sliding column 12 to move downward together. When the rotating roller 6 and the extrusion plate 5 lose the contact surface, the first extrusion spring 7 will drive the extrusion plate 5 back to the initial position.

[0061] In this embodiment, a connecting rod 17 and a piston block 18 are fixedly installed on the lower sliding column 12, and the piston block 18 extends into the piston cylinder 8. A first connecting channel 19 is provided inside the connecting rod 17, and the first connecting channel 19 extends into the piston cylinder 8 to enable the piston cylinder 8 and the second connecting pipe 14 to be connected to each other.

[0062] When the lower sliding column 12 moves downward, it will drive the piston block 18 to squeeze the gas in the piston cylinder 8, and will also drive the connecting rod 17 to move downward. At the same time, through the cooperation of the tooth column and the rotating gear 13, the mounting frame 9 will move upward and drive the cutting knife 11 to approach the foam body 3. When the first connecting channel 19 enters the piston cylinder 8, the gas in the piston cylinder 8 will enter the second connecting tube 14 through the first connecting channel 19, and pass into the first connecting tube 10, completing the cutting of the foam body 3 by the cutting knife 11.

[0063] The working principle of this embodiment is as follows: when the motor 4 rotates, it will drive the rotating roller 6 to rotate. When the rotating roller 6 rotates, it will drive the extrusion plate 5 to move downward, and at the same time drive the first extrusion spring 7 to stretch. When the extrusion plate 5 moves downward, it will drive the lower sliding column 12 to move downward together. When the rotating roller 6 and the extrusion plate 5 lose the contact surface, the first extrusion spring 7 will drive the extrusion plate 5 back to the initial position.

[0064] When the lower sliding column 12 moves downward, it will drive the piston block 18 to squeeze the gas in the piston cylinder 8, and will also drive the connecting rod 17 to move downward. At the same time, through the cooperation of the tooth column and the rotating gear 13, the mounting frame 9 will move upward and drive the cutting knife 11 to approach the foam body 3. When the first connecting channel 19 enters the piston cylinder 8, the gas in the piston cylinder 8 will enter the second connecting tube 14 through the first connecting channel 19, and pass into the first connecting tube 10, completing the cutting of the foam body 3 by the cutting knife 11.

[0065] The motor 4 drives the toggle block 26 to rotate through the connecting mechanism 23, and the gas in the first connecting pipe 10 will enter the connecting frame 25. The toggle block 26 will drive the block 28 on different sides to move when it rotates forward and reversely. When the block 28 on different sides moves, the second connecting channel 27 on different sides will be opened, which can avoid that the two cutting knives 11 will not work at the same time, and the two cutting knives 11 will work alternately to increase the service life of the cutting knives 11. When a single cutting knife 11 is damaged, another cutting knife 11 continues to work to avoid the reduction of the cutting efficiency of the foam body 3. It can enter the connecting frame 21 through different ventilation channels 24. Entering the connecting frame 21 will make the push rod 30 extend into the connecting frame 30, and squeeze the third extrusion spring 31. When the push rod 30 moves, the limit column 36 and the push block 33 Separation, the pushing block 33 releases a huge elastic force under the action of the ejection spring 34, prompting the pushing block 33 to push the sliding block 37 to slide on the track column 22. When the sliding block 37 moves, it will drive the cutting knife 11 to cut the foam body 3 horizontally. When the sliding block 37 and the cutting knife 11 move to the end of the track column 22, the sliding block 37 will contact the buffer plate 38, and the buffer plate 38 will contact the sliding plate 40, prompting the sliding plate 40 to squeeze the buffer spring 15, which can prevent the cutting knife 11 from being hit. At the same time, the buffer spring 15 can also accumulate force for the return of the cutting knife 11, so that the sliding block 37 and the cutting knife 11 return to the initial position, and as the sliding plate 40 moves, it will contact the contact block 16, and the contact block 16 will trigger the electromagnet 35 to work, and the electromagnet 35 will adsorb the pushing block 33 to the initial position.

[0066] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A flame retardant foam insulation material preparation device, comprising a conveyor belt (1) and a cutting box (2), wherein the conveyor belt (1) passes through the cutting box (2), and a foam body (3) is arranged on the conveyor belt (1), characterized in that: The cutting box (2) is provided with a track frame (20), and the track frame (20) is provided with a cutting knife (11) and a knife changing assembly, the number of the cutting knives (11) is two, and the two cutting knives (11) are staggered and distributed, and the knife changing assembly can drive the two cutting knives (11) to move back and forth to cut the foam body (3), thereby improving the cutting efficiency of the foam body (3); The knife changing assembly comprises a pushing block (33), a ejection spring (34) and a sliding block (37); the ejection spring (34) releases pressure to drive the pushing block (33) to eject the sliding block (37); the sliding block (37) drives the cutting knife (11) to slide in the track frame (20) and cuts from the side of the foam body (3).

2. The flame retardant foam thermal insulation material preparation device according to claim 1, characterized in that: The track frame (20) is provided with a track column (22), a limit block (32) and an electromagnet (35); the pushing block (33), the ejection spring (34) and the sliding block (37) are all located outside the track column (22); the limit block (32) is in contact with the sliding block (37); and the limit column (36) is provided on the pushing block (33).

3. The flame retardant foam insulation material preparation device according to claim 2, characterized in that: The track frame (20) is also provided with a buffer plate (38) and a buffer cavity (39), the buffer cavity (39) is provided with a sliding plate (40), a buffer spring (15) and a contact block (16), the buffer plate (38) is in contact with the sliding plate (40) and is located outside the track column (22).

4. The flame retardant foam thermal insulation material preparation device according to claim 2, characterized in that: A connecting frame (21) is provided at the end of the track frame (20), a first connecting pipe (10) is provided at the other end of the connecting frame (21), the first connecting pipe (10), the connecting frame (21) and the track frame (20) are interconnected, a third extrusion spring (31) and a push rod (30) are provided in the connecting frame (21), and the push rod (30) and the limiting column (36) are in contact via an inclined surface.

5. The flame retardant foam insulation material preparation device according to claim 4, characterized in that: The first connecting pipe (10) is provided with a venting channel (24) and a connecting block (25), the connecting block (25) divides the venting channel (24) into two parts, a second connecting channel (27) is provided on both sides of the connecting block (25), a toggle block (26), a stopper (28) and a second extrusion spring (29) are provided in the connecting block (25), and the toggle block (26) can adjust the stopper (28) to open the second connecting channel (27).

6. The flame retardant foam thermal insulation material preparation device according to claim 5, characterized in that: The cutting box (2) is provided with a motor (4) on the outside, and a rotating roller (6) and a connecting mechanism (23) are provided on the output shaft of the motor (4), and the connecting mechanism (23) is in contact with a toggle block (26). The cutting box (2) is also provided with an extrusion plate (5), a piston cylinder (8), a mounting frame (9) and a rotating gear (13), the rotating roller (6) is located above the extrusion plate (5) and in contact with the extrusion plate (5), the cutting knife (11) is located below the extrusion plate (5), and a cutting groove matching the cutting knife (11) is provided below the extrusion plate (5).

7. The flame retardant foam insulation material preparation device according to claim 6, characterized in that: A second connecting pipe (14) is provided at the end of the piston cylinder (8); the second connecting pipe (14) passes through the mounting frame (9) and is connected to the first connecting pipe (10); and the tool changing assembly is located in the mounting frame (9).

8. The flame retardant foam thermal insulation material preparation device according to claim 6, characterized in that: A first extrusion spring (7) is arranged on the side of the extrusion plate (5), a lower slide column (12) is arranged at the bottom end of the extrusion plate (5), a tooth column is arranged on the outer wall of the installation frame (9), and the rotating gear (13) is meshedly connected with the lower slide column (12) and the tooth column.

9. The flame retardant foam thermal insulation material preparation device according to claim 7, characterized in that: The lower sliding column (12) is provided with a connecting rod (17) and a piston block (18), and the piston block (18) extends into the piston cylinder (8). A first connecting channel (19) is provided inside the connecting rod (17), and the first connecting channel (19) extends into the piston cylinder (8) to facilitate mutual communication between the piston cylinder (8) and the second connecting pipe (14).

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