Pressure-feeding mechanism for sponge cutting

Abstract

The present invention relates to a material pressing mechanism for sponge cutting, which comprises a pair of vertically arranged track frames, and a material pressing device is arranged between the track frames; the material pressing device comprises a cross beam and a pressing plate group arranged on the lower side of the cross beam, the pressing plate group comprises a plurality of pressing plates arranged in parallel along 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; each pressing plate comprises a housing and a conveying device arranged in the housing, the conveying device comprises 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 machined in the middle of the two side walls of the housing along the length direction, and a connecting rod telescopic mechanism passes through the strip-shaped holes and the conveyor belt and connects all the pressing plates; the material pressing mechanism of the present invention has the advantages of adjustable width, convenience, flexibility, good adaptability and avoiding excessive deformation on the surface of the sponge embryo body.

Description

Technical Field

[0001] The present invention belongs to the technical field of numerical control cutting equipment, and particularly relates to a pressure-feeding mechanism for sponge cutting. 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 required shapes. After being processed by a horizontal cutting machine and a vertical (standing) cutting machine, they are cut into 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, especially during horizontal cutting, in order to ensure cutting accuracy and prevent the sponge blank from shifting under the action of cutting resistance and other factors, resulting in changes in product dimensions 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.

[0004] 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 a pressure application method preferred by some smaller factories at present. However, due to reasons such as uneven pressure application and small pressure in manual auxiliary pressing, it is difficult to ensure the high precision of sponge products and there are relatively large safety hazards.

[0005] 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 larger the amount of deformation, the greater the negative impact on cutting and the more obvious the impact on cutting error. 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, the elasticity and the like of each batch of sponge blanks will also vary slightly, 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.

[0006] In view of this, it is necessary to provide a pressure-feeding device that can be telescoped and has better control over the deformation of the sponge surface. Summary of the Invention

[0007] The object of the present invention is to provide a material pressing mechanism for sponge cutting which has adjustable width, is convenient and flexible, has good adaptability and can avoid excessive deformation of the surface of the sponge embryo.

[0008] In order to solve the above technical problems, the present invention discloses a material pressing mechanism for sponge cutting, which is arranged above the feeding platform of the sponge cutting machine to press and fix the sponge embryo, comprising a pair of vertically arranged track frames, a material pressing device is arranged between the track frames; the material pressing device comprises a crossbeam and a pressing plate group arranged at the lower side of the crossbeam, the pressing plate group comprises a plurality of pressing plates arranged in parallel in parallel with the feeding direction, the crossbeam can move up and down along the track frame, and the pressing plate can move along the length direction of the crossbeam; the pressing plate comprises a shell and a conveying device arranged in the shell, the conveying device comprises an annular conveyor belt and a rotating wheel group 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 holes are processed in the middle of the two side walls of the shell along the length direction, the connecting rod telescopic mechanism passes through the strip holes and the conveyor belt and connects all the pressing plates, and the multi-link telescopic mechanism comprises a plurality of connecting rods hinged at the head and tail; a mounting plate is horizontally arranged at the edge of the strip hole on the inner wall of the shell, and the mounting plate is hinged to the middle part of the connecting rod;

[0009] The pressure plate group includes a head end pressure plate, a plurality of middle pressure plates, and a terminal pressure plate which are arranged in sequence; the head end pressure plate is connected and fixed to the cross beam, a first motor is arranged on the terminal pressure plate, 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, when the first motor is started, it drives the terminal pressure plate to move along the track rod, when the terminal 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.

[0010] Preferably, it also includes a second motor, which is connected to the first rotating shaft through a belt; the second motor drives the conveyor belt to rotate in a circle through the first rotating shaft, and the second motor is fixed to the head end pressure plate, and the first rotating shaft passes through a row of wheels at the end of the rotating wheel group, namely, the driving wheel, and the driving wheel can move along the first rotating shaft with the pressure plate.

[0011] Preferably, the crossbeam is also provided with a third motor and a second rotating shaft, 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 provided at both ends of the second rotating shaft, a rack is provided on the track frame, the gear and the rack are meshed, and the third motor controls the crossbeam to rise and fall along the track frame by driving the second rotating shaft.

[0012] Preferably, a slider is fixed to the top of the pressure plate, a track is provided at the bottom of the crossbeam, and the slider moves along the crossbeam.

[0013] Preferably, the length of the track rod is smaller than the length of the crossbeam and larger than the maximum variation of the overall width of the pressure plate group.

[0014] 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 arranged on the inner wall of the housing of the first pressing plate, and the light receiver is correspondingly arranged on the inner wall of the housing of the last pressing plate. The light emitter and the light receiver are on the same straight line;

[0015] A through hole is provided at a position 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 hole and reaches the light receiver;

[0016] When the conveyor belt presses on the sponge, the sponge under the conveyor belt is locally 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.

[0017] Preferably, 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.

[0018] Preferably, when the lowermost light sensor is triggered, it indicates that the pressure plate has contacted the upper surface of the sponge embryo, and at least produced 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 the set program, control the cross beam to stop moving, or continue to descend to increase the pressure, or control the cross beam to rise a distance less than the thickness of one conveyor belt to reduce the deformation amount of the upper surface of the sponge embryo.

[0019] Preferably, the light sensor is arranged at the front part and / or the rear part of the pressing plate.

[0020] 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.

[0021] The pressing mechanism for sponge cutting of the present invention has at least the following advantages:

[0022] 1) The width and height are adjustable, and it can well adapt to sponge embryos of different widths and heights.

[0023] 2) Driven by the second motor, the rotation of the conveyor belt can be synchronized with the movement of the feeding platform. While maintaining stable pressing, it can also cooperate with the feeding platform to move the sponge embryo according to the control program, and there is no need for the whole pressing device to move horizontally, which is beneficial to simplifying the structure and reducing the overall volume of the mechanism.

[0024] 3) By using the light sensor to monitor different degrees of sponge deformation, it can effectively prevent excessive deformation of the sponge embryo during pressing. Moreover, the light curtain formed by multiple groups of light sensors can monitor different degrees of sponge deformation, which is convenient to controllably set the deformation amount according to production needs and ensure that the pressure during pressing is in an optimal range. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a blank holding mechanism.

[0026] Figure 2 It is Figure 1 a schematic structural diagram of the middle blank holding mechanism from another perspective.

[0027] Figure 3 It is a schematic structural diagram of the blank holding mechanism after hiding the track frame.

[0028] Figure 4 It is Figure 3 a schematic structural diagram of the middle blank holding mechanism after hiding the crossbeam and the housing of one of the pressing plates.

[0029] Figure 5 It is a schematic structural diagram of a first-end pressing plate.

[0030] Figure 6 It is a schematic structural diagram of the first-end pressing plate after hiding the pressing plate.

[0031] Figure 7 It is a schematic structural diagram of a first-end pressing plate with a light sensor.

[0032] Figure 8 It is a schematic structural diagram of a set of pressing plates with a light sensor and through holes.

[0033] Figure 9 It is a schematic structural diagram of a pressing plate with a pressure sensing device.

[0034] The reference numerals in the figure are: 1 - track frame, 2 - blank holding device, 3 - crossbeam, 4 - set of pressing plates, 401 - first-end pressing plate, 402 - several middle pressing plates, 403 - end pressing plate, 5 - pressing plate, 6 - conveying device, 7 - housing, 610 - conveyor belt, 620 - set of rollers, 621 - driving wheel, 701 - strip-shaped hole, 8 - link telescoping mechanism, 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 Description of the Invention

[0035] The following further elaborates on the present invention through embodiments, so that those skilled in the art can implement it with reference to the text of the specification.

[0036] 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.

[0037] Embodiment 1

[0038] As Figure 1-2 shown, a material pressing mechanism for sponge cutting is used to press and fix a sponge embryo above a feeding platform of a sponge cutting machine. It includes a pair of vertically arranged track frames 1, 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 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 7 and a conveying device 6 arranged in the housing. The conveying device includes an annular conveyor belt 610 and a runner group 620 that supports 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 several 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.

[0039] As Figure 3-6 shown, the pressing plate group includes a first-end pressing plate 401, several middle 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 arranged on the last-end pressing plate. A track rod 10 is arranged on the cross beam, and the track rod is parallel to the cross beam. The first motor is connected to the track rod. 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.

[0040] As Figure 4 shown, it further includes a second motor 11. The second motor is drivingly connected to a first rotating shaft 13 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, and the first rotating shaft passes through a row of end-position runners in the runner group. This runner is the driving wheel 621, 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.

[0041] A third motor 14 and a second rotating shaft 15 are further arranged 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 21 are arranged at both ends of the second rotating shaft, and a rack 20 is arranged on the track frame. The gears are engaged with the rack. The third motor controls the cross beam to lift along the track frame by driving the second rotating shaft.

[0042] The overall width of the first motor control pressure plate group. The second motor controls the rotation of the conveyor belt, enabling the sponge embryo to move synchronously with the feeding platform to avoid sliding.

[0043] As Figure 2 shown, a slider 16 is fixed to the top of the pressure plate, and a track is provided at the lower part of the cross beam. The slider moves along the cross beam.

[0044] The length of the track rod is less than the length of the cross beam and greater than the maximum variation of the overall width of the pressure plate group.

[0045] Embodiment 2

[0046] As Figure 7-8 shown, 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 pressure 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 arranged on the inner wall of the housing of the first-end pressure plate, and the light receiver is correspondingly arranged on the inner wall of the housing of the last-end pressure plate. The light emitter and the light receiver are on the same straight line; The light emitter preferably has a strong light signal directivity to ensure the accuracy of monitoring.

[0047] Through holes 18 are provided at positions corresponding to the light sensors on the housing. The light signal emitted by the light emitter passes through all the intermediate pressure 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, making the upper surface of the sponge between the two pressure plates higher than the bottom surface of the conveyor belt; When the local depression of the sponge exceeds the set limit, the upper surface of the sponge between the two pressure plates blocks the propagation of the light signal. When the upper surface of the sponge between any two pressure plates bulges and can block the light signal, this group of light sensors can be triggered. The light sensors include several groups arranged from bottom to top. Multiple groups of light sensors form a light curtain, and light sensors at different heights monitor different degrees of sponge deformation.

[0048] 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. The height of the light signal emitted by the lowermost light sensor is preferably slightly higher than the upper surface of the lower conveyor belt, so that the light sensor is more sensitive to the shape of the sponge surface.

[0049] The light sensor is arranged at the front part and / or the rear part of the pressing plate. The significance of arranging the light 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 prone to form local gathering at the front or rear part, thus aggravating the deformation and triggering the upper light 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.

[0050] Embodiment 3

[0051] As Figure 9 shown, similar to Embodiment 1, the difference is that no light sensor is provided, and a pressure sensing device 19 is provided at the lower edge of the housing of the pressing plate. 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, with a simple structure, quantifiable pressure, and more intuitive. However, the deformation amount of the surface of the sponge embryo cannot be controlled. 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 better pressing effect without having a great impact on sponge cutting.

[0052] Although the embodiments of the present invention have been disclosed as above, it is 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 familiar with the field, 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 material pressing mechanism for sponge cutting, which is arranged above the feeding platform of a sponge cutting machine to press and fix the sponge embryo. It is characterized in that It includes a pair of vertically arranged track frames, and a material pressing device is arranged between the track frames; the material pressing device includes a crossbeam and a pressing plate group arranged on the lower side of the crossbeam, and the pressing plate group includes a plurality of pressing plates arranged in parallel in parallel with the feeding direction, the crossbeam can move up and down along the track frame, and the pressing plate can move along the length direction of the crossbeam; the pressing plate includes a shell and a conveying device arranged in the shell, and the conveying device includes an annular conveyor belt and a rotating wheel group 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 holes are processed in the middle of the two side walls of the shell along the length direction, and the connecting rod telescopic mechanism passes through the strip holes and the conveyor belt and connects all the pressing plates, and the multi-link telescopic mechanism includes a plurality of connecting rods hinged at the head and tail; a mounting plate is horizontally provided at the edge of the strip hole on the inner wall of the shell, and the mounting plate is hinged to the middle part of the connecting rod; The pressing plate group includes a head pressing plate, a plurality of middle pressing plates, and a terminal pressing plate which are arranged in sequence; the head pressing plate is connected and fixed to the cross beam, a first motor is arranged on the terminal pressing plate, 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, when the first motor is started, the terminal pressing plate is driven to move along the track rod, when the terminal 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 coverage width of the pressing plate group changes to adapt to sponge embryos of different widths; The pressing plate is provided with an optical sensor for monitoring the degree of deformation of the sponge under pressure, and the optical sensor includes a light emitter and a light receiver. The light emitter is arranged on the inner wall of the shell of the first end pressing plate, and the light receiver is correspondingly arranged on the inner wall of the shell of the end pressing plate, and the light emitter and the light receiver are in the same straight line; A through hole is provided on the housing at a position corresponding to the optical sensor, and the optical signal emitted by the optical transmitter passes through all the intermediate pressure plates through the through hole to reach the optical receiver; When the conveyor belt presses on the sponge, the sponge below the conveyor belt partially sinks, so that the upper surface of the sponge between the two pressure 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 pressure plates blocks the propagation of the light signal, and the light sensor is triggered; The optical sensors include several groups arranged from bottom to top, and the multiple groups of optical sensors form a light curtain. Optical sensors at different heights monitor sponge deformations of different degrees.

2. The material pressing mechanism for sponge cutting according to claim 1, It is characterized in that It also includes a second motor, which is connected to the first rotating shaft through a belt; the second motor drives the conveyor belt to rotate in a circle through the first rotating shaft, and the second motor is fixed to the head end pressure plate, and the first rotating shaft passes through a row of rotating wheels at the end of the rotating wheel group, namely the driving wheel, and the driving wheel can move along the first rotating shaft with the pressure plate.

3. The material pressing mechanism for sponge cutting according to claim 2, It is characterized in that A third motor and a second rotating shaft are further 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. A rack is provided on the track frame. The gears are engaged with the rack. The third motor controls the cross beam to lift along the track frame by driving the second rotating shaft.

4. The material pressing mechanism for sponge cutting according to claim 1, wherein, a slider is fixed to the top end of the pressing plate, and a track is provided at the lower part of the cross beam. The slider moves along the cross beam.

5. The material pressing mechanism for sponge cutting according to claim 1, wherein, the length of the track rod is less than the length of the cross beam and greater than the maximum variation of the overall width of the pressing plate group.

6. The material pressing mechanism for sponge cutting according to claim 1, wherein, when the lowermost light sensor is triggered, it indicates that the pressing plate has contacted the upper surface of the sponge embryo, and at least a deformation equivalent to the thickness of a conveyor belt has been generated 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 a conveyor belt to reduce the deformation amount of the upper surface of the sponge embryo.

7. The material pressing mechanism for sponge cutting according to claim 1, wherein, the light sensor is provided at the front part and / or the rear part of the pressing plate.

8. The material pressing mechanism for sponge cutting according to claim 1, wherein, 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.

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