Double-ring knife sponge cutting machine

Abstract

The present invention relates to a double-ring knife sponge cutting machine, which comprises a transverse cutting part and a vertical cutting part. The transverse cutting part includes a first feeding platform, and the vertical cutting part includes a vertical knife and a second feeding platform. The sponge embryo is processed by one feeding platform and then immediately enters another feeding platform for processing. There is a slit between the first feeding platform and the second feeding platform, and the vertical knife passes through the slit. The transverse cutting part further includes a material pressing mechanism and a transverse cutting mechanism. The transverse cutting mechanism is arranged on the side near the slit above the first feeding platform. The transverse cutting mechanism includes a vertically arranged transverse knife track and a transverse knife that can move up and down along the transverse knife track. The transverse knife is arranged below the material pressing mechanism. The material pressing mechanism is arranged between the transverse knife track and the vertical knife. The sponge embryo is vertically cut immediately after being transversely cut, or the sponge embryo is transversely cut immediately after being vertically cut, and the cutting can be completed in one loading on the machine. The present invention has the advantages of double cutting knives, can be cut and formed in one loading on the machine, high production efficiency, and high product size accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of numerical control cutting equipment, and particularly relates to a double-ring knife sponge cutting machine. Background Art

[0002] Sponges are widely used in industries such as packaging, furniture, and auto parts, and the social demand is extremely large. Except for foamed products formed by injection molding, sponge products generally cut large sponge blanks into products of the required shapes. After being processed by a horizontal cutting machine and a vertical cutting (standing cutting) machine, they are cut into the required shapes. With the development of numerical control technology, special-shaped sponge products such as pillows can also be quickly cut and formed by a numerical control sponge cutting machine.

[0003] During the cutting process of sponges, generally two cutting processes, namely horizontal cutting and vertical cutting, are required to obtain formed products. After the sponge blanks are processed on the horizontal cutting machine, they are transferred to the vertical cutting machine for processing. During this period, the transfer of the sponge blanks (realized through a transfer vehicle or an auxiliary platform for transitional connection) takes a certain amount of time. It is inevitable that the sponge blanks will be displaced when they are transferred to the vertical cutting machine. Before the vertical cutting starts, it is also necessary to re-align and position the sponge blanks again, which will reduce the production efficiency to a certain extent. In addition, the bumps of the sponge blanks that have only undergone horizontal or vertical cutting during the transfer process may also cause the sponge blanks that have only been cut once to become loose, affecting the final product size accuracy.

[0004] In addition, during the cutting process of the sponge, in order to ensure the cutting accuracy and prevent the sponge blank from shifting under the action of cutting resistance and other factors, resulting in product size changes or even scrapping, it is necessary to apply a certain pressure to the upper surface of the sponge blank to ensure that the sponge blank can move with the feeding platform, and there is no relative sliding between the sponge blank and the feeding platform during this process. Currently, manual auxiliary pressing or an electronically controlled lifting pressure plate is mostly used to apply pressure to the sponge blank; manual auxiliary pressing has a low cost and flexible operation, and is still the pressure application method preferred by some smaller factories at present. However, due to reasons such as uneven pressure application and relatively small pressure in manual auxiliary pressing, it is difficult to ensure the high precision of sponge products and there are relatively large safety hazards. Applying pressure to the upper surface of the sponge blank through an electronically controlled lifting pressure plate (the pressure plate moves synchronously with the feeding platform) is a safer method and the pressure is more uniform. However, due to the lack of sensitive pressure monitoring, for sponges with different elasticities, applying the same pressure will cause different amounts of deformation. The greater the amount of deformation, the greater the negative impact on cutting and the more obvious the impact on cutting errors; the solution of using a pressure sensor to control the pressure to avoid excessive deformation on the surface of the sponge blank can better solve such problems. However, even for sponge blanks of the same texture, there will be slight differences in the elasticity and the like of each batch of sponge blanks, and the local density and elasticity of some sponge blanks are not uniform. Without understanding the elasticity and other aspects of sponge blanks of different textures and rich processing experience, it is not easy to make the pressure within the effective value and not cause excessive deformation on the surface of the sponge blank. In addition, for sponge blanks of different widths, the pressure plate cannot match the width, lacking flexibility and adaptability.

[0005] In view of this, it is necessary to provide a sponge cutting machine that can be cut and formed in one operation on the machine and has high production efficiency. Summary of the Invention

[0006] The purpose of the present invention is to provide a double-ring knife sponge cutting machine with double cutting knives, which can be cut and formed in one operation on the machine, has high production efficiency, and high product size accuracy.

[0007] To solve the above technical problems, the present invention discloses a double-ring knife sponge cutting machine, which includes a cross-cutting part and a vertical-cutting part. The cross-cutting part includes a first feeding platform, and the vertical-cutting part includes a vertical knife and a second feeding platform. The first feeding platform and the second feeding platform are arranged adjacent to each other. After the sponge embryo is processed by one feeding platform, it immediately enters the other feeding platform for processing. There is a slit between the first feeding platform and the second feeding platform, and the vertical knife passes through the slit. The cross-cutting part further includes a material pressing mechanism and a cross-cutting mechanism. The cross-cutting mechanism is arranged on the side near the slit above the first feeding platform. The cross-cutting mechanism includes a horizontally arranged cross-knife rail and a cross knife that can move up and down along the cross-knife rail. The cross knife is arranged below the material pressing mechanism. The material pressing mechanism is arranged between the cross-knife rail and the vertical knife. After the sponge embryo is cross-cut, it is immediately vertically cut, or after the sponge embryo is vertically cut, it is immediately cross-cut, and the cutting can be completed in one loading.

[0008] Preferably, a pair of material pressing rollers are arranged parallel to the slit above the slit, the vertical knife passes through between the two material pressing rollers, and material pressing roller tracks for the up and down movement of the material pressing rollers are arranged on both sides of the second feeding platform.

[0009] Preferably, the material pressing mechanism includes a pair of track frames vertically arranged on both sides of the first feeding platform, and a material pressing device is arranged between the track frames. The material pressing device includes a cross beam and a pressing plate group arranged on the lower side of the cross beam. The pressing plate group includes a plurality of pressing plates arranged in parallel to the feeding direction and side by side. The cross beam can move up and down along the track frames, and the pressing plates can move along the length direction of the cross beam. The pressing plate includes a housing and a conveying device arranged in the housing. The conveying device includes an annular conveyor belt and a runner group for supporting the rotation of the conveyor belt. The lower part of the housing is open to expose the lower part of the conveyor belt. Strip-shaped holes are processed along the length direction in the middle of both side walls of the housing. A link telescopic mechanism passes through the strip-shaped holes and the conveyor belt and connects all the pressing plates. The multi-link telescopic mechanism includes several links hinged end to end. An installation plate is horizontally arranged at the edge of the strip-shaped hole on the inner wall of the housing, and the middle part of the link is hinged to the installation plate.

[0010] The pressing plate group includes a first-end pressing plate, several middle pressing plates, and a last-end pressing plate arranged in sequence. The first-end pressing plate is fixedly connected to the cross beam. A first motor is arranged on the last-end pressing plate, and a track rod is arranged on the cross beam. The track rod is parallel to the cross beam. The first motor is connected to the track rod. Sliders are fixed at the tops of the middle pressing plates and the last-end pressing plate. A track is arranged below the cross beam, and the sliders move along the cross beam.

[0011] When the first motor is started, it drives the last-end pressing plate to move along the track rod. When the last-end pressing plate moves, the multi-link telescopic mechanism is forced to deform as a whole, driving the distance between the pressing plates to change, so that the overall covering width of the pressing plate group changes to adapt to sponge embryos of different widths.

[0012] Preferably, it further includes a conveying device and a lifting device.

[0013] The conveying device includes a second motor and a first rotating shaft. The second motor is drivingly connected to the first rotating shaft through a belt. The second motor drives the conveyor belt to rotate in a cycle through the first rotating shaft. The second motor is fixed on the head pressing plate, and the first rotating shaft passes through a row of end-positioned rotating wheels in the rotating wheel group, that is, the driving wheel. The driving wheel can move along the first rotating shaft with the pressing plate.

[0014] The lifting device includes a third motor and a second rotating shaft provided on the cross beam. The second rotating shaft is parallel to the cross beam. The third motor is drivingly connected to the middle of the second rotating shaft. Gears are provided at both ends of the second rotating shaft, and racks are provided on the track frame. The gears are engaged with the racks. The third motor controls the cross beam to lift along the track frame by driving the second rotating shaft.

[0015] Preferably, the length of the track rod is less than the length of the cross beam and greater than the maximum change amount of the overall width of the pressing plate group.

[0016] Preferably, a light sensor for monitoring the deformation degree of the sponge under pressure is provided on the pressing plate. The light sensor includes a light emitter and a light receiver. The light emitter is provided on the inner wall of the housing of the head pressing plate, and the light receiver is correspondingly provided on the inner wall of the housing of the tail pressing plate. The light emitter and the light receiver are on the same straight line.

[0017] Through holes are provided at positions corresponding to the light sensor on the housing. The light signal emitted by the light emitter passes through all the intermediate pressing plates through the through holes and reaches the light receiver.

[0018] When the conveyor belt presses on the sponge, the sponge under the conveyor belt is partially sunken, so that the upper surface of the sponge between the two pressing plates is higher than the bottom surface of the conveyor belt. When the local sinking of the sponge exceeds the set limit, the upper surface of the sponge between the two pressing plates blocks the propagation of the light signal, and the light sensor is triggered.

[0019] Preferably, the light sensors include several groups arranged from bottom to top. The multiple groups of light sensors form a light curtain, and the light sensors at different heights monitor the deformation of the sponge at different degrees.

[0020] Preferably, when the lowermost light sensor is triggered, it indicates that the pressure plate has contacted the upper surface of the sponge embryo and caused at least a deformation equivalent to the thickness of one conveyor belt on the upper surface of the sponge embryo. At this time, according to actual needs or a set program, control the cross beam to stop moving, or continue to descend to increase the pressure, or control the cross beam to rise by a distance less than the thickness of one conveyor belt to reduce the deformation amount of the upper surface of the sponge embryo.

[0021] Preferably, the light sensor is provided at the front part and / or the rear part of the pressing plate.

[0022] Preferably, a pressure sensing device is provided at the lower edge of the housing of the pressing plate, and the lower edge of the pressure sensing device is not lower than the bottom surface of the conveyor belt.

[0023] The double-ring knife sponge cutting machine of the present invention has at least the following advantages:

[0024] 1) The sponge cutting machine of the present invention integrates horizontal cutting and vertical cutting. Combining advanced numerical control technology, one person can complete the operations of horizontal cutting and vertical cutting on this equipment, solving the problems of cumbersome operation, increased error, long time consumption, low efficiency, etc. caused by the separation of horizontal cutting and vertical cutting. After any knife finishes cutting, the next knife can be cut, easily completing the switching between horizontal cutting and vertical cutting, meeting the requirements of three-dimensional products for combined horizontal and vertical cutting.

[0025] 2) High production efficiency. After any knife finishes cutting during the cutting process, it can be switched to another knife. There is no need for an auxiliary platform for transitional connection in the middle, and only one positioning is required. Therefore, there is no need to transfer to another equipment to complete the next process cutting, avoiding the displacement of the sponge during the transfer process. The horizontal and vertical cutting are completed in one go, the cut products are perfect, and the qualified rate exceeds 96%. It effectively reduces the transfer time, the efficiency can be increased by about 15%, and at the same time reduces the management cost. The manager no longer has to worry about how to allocate horizontal and vertical cutting. This equipment is combined with loading and unloading platforms, and can realize simultaneous loading and cutting, further increasing the cutting efficiency.

[0026] 3) The sponge cutting machine of the present invention has been iteratively optimized many times and finally integrates horizontal cutting and vertical cutting. It is stable and reliable, with a high qualified rate of finished products, low equipment failure rate, simple operation, easy to learn and master, and few vulnerable parts.

[0027] 4) The pressing width and height of the pressing mechanism are adjustable, which can well adapt to the horizontal cutting operation of sponge blanks with different widths and heights; by using optical sensors to monitor the deformation of the sponge to different degrees, it can effectively prevent excessive deformation of the sponge blank during pressing. Moreover, the light curtain formed by multiple groups of optical sensors can monitor the deformation of the sponge to different degrees, facilitating controllable setting of the deformation amount according to production needs, and ensuring that the pressure during pressing is within an optimal range.

[0028] 5) When the sponge blank is cut using this equipment, at the connection between the horizontal cutting part and the vertical cutting part, due to different cutting resistance directions, etc., the sponge blank is more likely to have local twisting and offset, etc., which affect the cutting accuracy. The pressing mechanism for horizontal cutting and the pressing roller for vertical cutting can form a large-area pressure at the connection, effectively reducing the occurrence of such situations and ensuring the cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a double-ring knife sponge cutting machine (the horizontal knife is not shown).

[0030] Figure 2 is Figure 1 A schematic diagram of the structure of the double-ring knife sponge cutting machine in another perspective in

[0031] Figure 3 is Figure 2 a schematic structural view of a double - ring knife sponge cutting machine with the upper and side parts of the machine body hidden from view

[0032] Figure 4 is a schematic structural view of a material pressing mechanism

[0033] Figure 5 is Figure 4 a schematic structural view of the material pressing mechanism from another perspective

[0034] Figure 6 is a schematic structural view of the material pressing mechanism with the track frame hidden

[0035] Figure 7 is Figure 6 a schematic structural view of the material pressing mechanism with the cross - beam and the housing of one of the pressing plates hidden

[0036] Figure 8 is a schematic structural view of a first - end pressing plate

[0037] Figure 9 is a schematic structural view of the first - end pressing plate with the pressing plate hidden

[0038] Figure 10 is a schematic structural view of a first - end pressing plate with a light sensor

[0039] Figure 11 is a schematic structural view of a pressing plate group with a light sensor and through - holes

[0040] Figure 12 is a schematic structural view of a pressing plate with a pressure sensing device

[0041] In the figure, the reference numerals are: a - cross - cutting part, a1 - first feeding platform, a2 - material pressing mechanism, a3 - cross - cutting mechanism, a31 - cross - knife track, b - vertical - cutting part, b1 - second feeding platform, b2 - vertical knife, b3 - material pressing roller, b4 - material pressing roller track, c - slit, 1 - track frame, 2 - material pressing device, 3 - cross - beam, 4 - pressing plate group, 401 - first - end pressing plate, 402 - middle pressing plate, 403 - end - pressing plate, 5 - pressing plate, 6 - conveying device, 7 - housing, 610 - conveyor belt, 620 - runner group, 621 - driving wheel, 701 - strip - shaped hole, 702 - mounting plate, 8 - link telescoping machine, 801 - link, 9 - first motor, 10 - track rod, 11 - second motor, 12 - belt, 13 - first rotating shaft, 14 - third motor, 15 - second rotating shaft, 16 - slider, 17 - light sensor, 1701 - light emitter, 1702 - light receiver, 18 - through - hole, 19 - pressure sensing device, 20 - rack, 21 - gear. Detailed implementation manners

[0042] The present invention will be further described in detail below through embodiments, so that those skilled in the art can implement it with reference to the text of the specification.

[0043] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0044] As Figures 1-3 shown, a double-ring knife sponge cutting machine includes a transverse cutting part a and a vertical cutting part b. The transverse cutting part includes a first feeding platform a1, and the vertical cutting part includes a vertical knife b2 and a second feeding platform b1. The first feeding platform and the second feeding platform are arranged adjacent to each other. After the sponge embryo is processed by one feeding platform, it immediately enters the other feeding platform for processing; there is a slit c between the first feeding platform and the second feeding platform, and the vertical knife passes through the slit; the transverse cutting part further includes a material pressing mechanism a2 and a transverse cutting mechanism a3. The transverse cutting mechanism is arranged on the side near the slit above the first feeding platform. The transverse cutting mechanism includes a vertically arranged transverse knife rail a31 and a transverse knife that can move up and down along the transverse knife rail. The transverse knife is arranged below the material pressing mechanism; the material pressing mechanism is arranged between the transverse knife rail and the vertical knife; after the sponge embryo is transversely cut, it is immediately vertically cut, or after the sponge embryo is vertically cut, it is immediately transversely cut, and the cutting can be completed in one operation on the machine.

[0045] A pair of pressure rollers b3 parallel to the slit are arranged above the slit, and the vertical knife passes through between the two pressure rollers. Pressure roller tracks b4 for the up and down movement of the pressure rollers are arranged on both sides of the second feeding platform. The pressure rollers are used for pressing the material during vertical cutting, and the material pressing mechanism is used for pressing the material during transverse cutting.

[0046] As Figures 4-9 shown, the material pressing mechanism includes a pair of track frames 1 vertically arranged on both sides of the first feeding platform, and a material pressing device 2 is arranged between the track frames; the material pressing device includes a cross beam 3 and a pressing plate group 4 arranged on the lower side of the cross beam. The pressing plate group includes a plurality of pressing plates 5 arranged in parallel in the feeding direction and side by side. The cross beam can move up and down along the track frames, and the pressing plates can move along the length direction of the cross beam; the pressing plate includes a housing 7 and a conveying device 6 arranged in the housing. The conveying device includes an annular conveyor belt 610 and a runner group 620 for supporting the rotation of the conveyor belt; the lower part of the housing is open to expose the lower part of the conveyor belt; strip-shaped holes 701 are processed along the length direction in the middle of both side walls of the housing. A link telescopic mechanism 8 passes through the strip-shaped holes and the conveyor belt and connects all the pressing plates. The multi-link telescopic mechanism includes a number of links 801 hinged end to end; mounting plates are horizontally arranged at the edges of the strip-shaped holes on the inner wall of the housing, and the mounting plates are hinged to the middle of the links.

[0047] As Figure 6As shown in the figure, the pressing plate group includes a first-end pressing plate 401, several intermediate pressing plates 402, and a last-end pressing plate 403 arranged in sequence; the first-end pressing plate is fixedly connected to the cross beam, and a first motor 9 is provided on the last-end pressing plate. A track rod 10 is provided on the cross beam, and the track rod is parallel to the cross beam. The first motor is connected to the track rod. Sliders 16 are fixedly provided at the tops of the intermediate pressing plates and the last-end pressing plate. A track is provided at the lower part of the cross beam, and the sliders move along the cross beam.

[0048] When the first motor is started, it drives the last-end pressing plate to move along the track rod. When the last-end pressing plate moves, the multi-link telescopic mechanism is forced to deform as a whole, driving the distance between the pressing plates to change, so that the overall covering width of the pressing plate group changes to adapt to sponge embryos of different widths.

[0049] It further includes a conveying device and a lifting device;

[0050] As Figure 7 shown in the figure, the conveying device includes a second motor 11 and a first rotating shaft 13. The second motor is drivingly connected to the first rotating shaft through a belt 12; the second motor drives the conveyor belt to rotate in a cycle through the first rotating shaft. The second motor is fixed on the first-end pressing plate. The first rotating shaft passes through a row of end-positioned rotating wheels in the rotating wheel group, and this rotating wheel is the driving wheel, and the driving wheel can move along the first rotating shaft with the pressing plate. The first rotating shaft can be a multi-faceted rod or a round rod with tooth grooves.

[0051] The lifting device includes a third motor 14 and a second rotating shaft 15 provided on the cross beam. The second rotating shaft is parallel to the cross beam. The third motor is drivingly connected to the middle part of the second rotating shaft. Gears 21 are provided at both ends of the second rotating shaft. A rack 20 is provided on the track frame, and the gears mesh with the rack. The third motor controls the cross beam to lift along the track frame by driving the second rotating shaft.

[0052] The length of the track rod is less than the length of the cross beam and greater than the maximum change amount of the overall width of the pressing plate group.

[0053] Embodiment 2

[0054] As Figures 10-11 shown in the figure, similar to Embodiment 1, the difference is that a light sensor 17 for monitoring the deformation degree of the sponge under pressure is provided on the pressing plate. The light sensor includes a light emitter 1701 and a light receiver 1702. One light emitter corresponds to one light receiver. The light emitter is provided on the inner wall of the housing of the first-end pressing plate, and the light receiver is correspondingly provided on the inner wall of the housing of the last-end pressing plate. The light emitter and the light receiver are on the same straight line; The light emitter is preferably one with strong light signal directivity to ensure the accuracy of monitoring.

[0055] A through hole 18 is provided at a position on the housing corresponding to the optical sensor. The optical signal emitted by the optical transmitter passes through all the intermediate pressing plates through the through hole and reaches the optical receiver. When the conveyor belt presses on the sponge, a part of the sponge under the conveyor belt sags locally, so that the upper surface of the sponge between the two pressing plates is higher than the bottom surface of the conveyor belt. When the local sag of the sponge exceeds the set limit, the upper surface of the sponge between the two pressing plates blocks the propagation of the optical signal. When the upper surface of the sponge between any two pressing plates bulges and can block the optical signal, this group of optical sensors can be triggered. The optical sensors include several groups arranged from bottom to top, and multiple groups of optical sensors form a light curtain. The optical sensors at different heights monitor different degrees of sponge deformation.

[0056] When the lowermost optical sensor is triggered, it indicates that the pressure plate has contacted the upper surface of the sponge embryo, and at least caused a deformation equivalent to the thickness of one conveyor belt on the upper surface of the sponge embryo. At this time, according to actual needs or a set program, control the crossbeam to stop moving, or continue to descend to increase the pressure, or control the crossbeam to rise by a distance less than the thickness of one conveyor belt to reduce the deformation amount of the upper surface of the sponge embryo. The height of the optical signal emitted by the lowermost optical sensor is preferably slightly higher than the upper surface of the lower conveyor belt, so that the optical sensor is more sensitive to the shape of the sponge surface.

[0057] The optical sensor is arranged at the front part and / or the rear part of the pressing plate. The significance of arranging the optical sensors at the front and rear positions is that when the movement of the conveyor belt is inconsistent with the feeding platform, the upper surface of the sponge embryo is likely to form local gathering at the front or rear, which exacerbates the deformation and triggers the upper optical sensor. At this time, an alarm can be formed, and the operator can check the conveying device to ensure the accuracy of numerical control cutting.

[0058] Embodiment 3

[0059] As Figure 12 shown, similar to Embodiment 1, the difference is that a pressure sensing device 19 is provided at the lower edge of the housing of the pressing plate, and the lower edge of the pressure sensing device is not lower than the bottom surface of the conveyor belt. The pressure during pressing is monitored through the pressure sensing device. The structure is simple, the pressure can be quantified, and it is more intuitive. However, the deformation amount of the surface of the sponge embryo cannot be controlled, and it is suitable for cutting sponges with a relatively hard texture. Experienced operators can make adaptive fine-tuning of the height of the pressing device according to the actual situation, and can also keep the pressing device in a state of good pressing effect without having a great impact on sponge cutting.

[0060] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A double-ring knife sponge cutting machine, characterized in that, it includes a transverse cutting part and a vertical cutting part. The transverse cutting part includes a first feeding platform, and the vertical cutting part includes a vertical knife and a second feeding platform. The first feeding platform and the second feeding platform are arranged adjacent to each other. After the sponge embryo is processed by one feeding platform, it immediately enters another feeding platform for processing. There is a slit between the first feeding platform and the second feeding platform, and the vertical knife passes through the slit. The transverse cutting part further includes a material pressing mechanism and a transverse cutting mechanism. The transverse cutting mechanism is arranged on the side near the slit above the first feeding platform. The transverse cutting mechanism includes a vertically arranged transverse knife rail and a transverse knife that can move up and down along the transverse knife rail. The transverse knife is arranged below the material pressing mechanism. The material pressing mechanism is arranged between the transverse knife rail and the vertical knife. After the sponge embryo is transversely cut, it is immediately vertically cut, or after the sponge embryo is vertically cut, it is immediately transversely cut, and the cutting can be completed in one loading. The material pressing mechanism includes a pair of rail frames vertically arranged on both sides of the first feeding platform, and a material pressing device is arranged between the rail frames. The material pressing device includes a cross beam and a pressing plate group arranged on the lower side of the cross beam. The pressing plate group includes a plurality of pressing plates arranged in parallel to the feeding direction and side by side. The pressing plate includes a shell and a conveying device arranged in the shell. A light sensor for monitoring the deformation degree of the sponge under pressure is arranged on the pressing plate. The light sensor includes a light emitter and a light receiver. The light emitter is arranged on the inner wall of the shell of the first pressing plate at the head end, and the light receiver is correspondingly arranged on the inner wall of the shell of the last pressing plate at the tail end. The light emitter and the light receiver are on the same straight line. Through holes are arranged at positions corresponding to the light sensor on the shell. The light signal emitted by the light emitter passes through all the intermediate pressing plates through the through holes and reaches the light receiver. When the conveyor belt presses on the sponge, the sponge under the conveyor belt is partially sunken, so that the upper surface of the sponge between the two pressing plates is higher than the bottom surface of the conveyor belt. When the partial sinking of the sponge exceeds the set limit, the upper surface of the sponge between the two pressing plates blocks the propagation of the light signal, and the light sensor is triggered. The light sensor includes several groups arranged from bottom to top. The multiple groups of light sensors form a light curtain, and the light sensors at different heights monitor different degrees of sponge deformation.

2. The double-ring knife sponge cutting machine according to claim 1, characterized in that, a pair of pressure rollers are arranged parallel to the slit above the slit, the vertical knife passes through between the two pressure rollers, and pressure roller tracks for the up and down movement of the pressure rollers are arranged on both sides of the second feeding platform.

3. The double-ring knife sponge cutting machine according to claim 1, characterized in that, the cross beam can move up and down along the rail frame, and the pressing plate can move along the length direction of the cross beam. The conveying device includes an annular conveyor belt and a runner group for supporting the rotation of the conveyor belt. The lower part of the shell is open to expose the lower part of the conveyor belt. Strip-shaped holes are processed in the middle of both side walls of the shell along the length direction. The connecting rod telescopic mechanism passes through the strip-shaped holes and the conveyor belt and connects all the pressing plates. The multi-link telescopic mechanism includes several connecting rods hinged end to end. An installation plate is horizontally arranged at the edge of the strip-shaped hole on the inner wall of the shell, and the installation plate is hinged to the middle of the connecting rod. The pressure plate group includes a head pressure plate, a plurality of middle pressure plates, and a terminal pressure plate which are arranged in sequence; the head pressure plate is connected and fixed to the cross beam, the terminal pressure plate is provided with a first motor, the cross beam is provided with a track rod, the track rod is parallel to the cross beam, the first motor is connected to the track rod, the top of the middle pressure plate and the terminal pressure plate are fixed with a slider, the lower part of the cross beam is provided with a track, and the slider moves along the cross beam; When the first motor is started, it drives the end pressure plate to move along the track rod. When the end pressure plate moves, the multi-link telescopic mechanism is forced to deform as a whole, driving the distance between the pressure plates to change, thereby changing the overall coverage width of the pressure plate group to adapt to sponge embryos of different widths.

4. The double ring knife sponge cutting machine according to claim 3, It is characterized in that It also includes a conveying device and a lifting device; The conveying device includes a second motor and a first rotating shaft, the second motor is connected to the first rotating shaft through a belt; the second motor drives the conveyor belt to rotate cyclically through the first rotating shaft, the second motor is fixed to the head end pressure plate, the first rotating shaft passes through a row of rotating wheels at the end of the rotating wheel group, that is, the driving wheel, and the driving wheel can move along the first rotating shaft with the pressure plate; The lifting device includes a third motor and a second rotating shaft arranged on the crossbeam. The second rotating shaft is parallel to the crossbeam. The third motor is transmission-connected to the middle part of the second rotating shaft. Gears are arranged at both ends of the second rotating shaft. A rack is arranged on the track frame. The gear and the rack are meshed. The third motor controls the crossbeam to rise and fall along the track frame by driving the second rotating shaft.

5. The double ring knife sponge cutting machine according to claim 3, It is characterized in that The length of the track rod is less than the length of the crossbeam and greater than the maximum variation of the overall width of the pressure plate group.

6. The double ring knife sponge cutting machine according to claim 1, It is characterized in that When the optical sensor at the lowest end is triggered, it indicates that the pressure plate has contacted the upper surface of the sponge embryo and has caused a deformation of the upper surface of the sponge embryo at least equivalent to the thickness of a conveyor belt. At this time, according to actual needs or set programs, the beam is controlled to stop moving, or continues to descend to increase pressure, or the beam is controlled to rise a distance less than the thickness of a conveyor belt to reduce the deformation of the upper surface of the sponge embryo.

7. The double ring knife sponge cutting machine according to claim 1, It is characterized in that The optical sensor is arranged at the front and / or rear of the pressing plate.

8. The double ring knife sponge cutting machine according to claim 3, It is characterized in that A pressure sensing device is provided at the lower edge of the shell of the pressing plate, and the lower edge of the pressure sensing device is not lower than the bottom surface of the conveyor belt.

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