High-uniformity foaming equipment and application thereof in sponge production

Abstract

The invention relates to the technical field of sponge foaming, in particular to high-uniformity foaming equipment and application thereof in sponge production.The high-uniformity foaming equipment comprises a supporting frame, a bearing plate and a fixing plate, the bearing plate and the fixing plate are fixed to the supporting frame, conveying rollers which are symmetrically arranged are rotationally installed on the supporting frame, and the conveying rollers are sleeved with a conveying belt; a conveying cylinder is fixed on the bearing plate, and a pumping nozzle is fixed at the bottom of the conveying cylinder; a buffer pressurizing mechanism and a constant-pressure pumping mechanism which are matched with each other are arranged in the conveying cylinder; a scraping mechanism is arranged on the fixing plate, the scraping mechanism comprises two scraping plates which are symmetrically arranged, the scraping mechanism is used for driving the scraping plates to move bidirectionally in the horizontal direction and paving the mixed liquid on the conveying belt, and a buffer pressurizing mechanism is matched with a constant-pressure pumping mechanism, so that the mixed liquid on the conveying belt can be uniformly paved on the scraping plates. When the pressure in the conveying cylinder reaches a set threshold value, the mixed liquid can be discharged through the pumping spray head under the constant pressure, so that the subsequent foaming uniformity is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sponge foaming, and specifically to a high-uniformity foaming device and its application in sponge production. Background Art

[0002] The production process of sponges varies depending on the type of material, mainly divided into natural sponges (marine organisms) and artificial sponges. For artificial sponges, foaming is one of the important steps in sponge production.

[0003] The principle of foaming is to make the liquid raw material expand and solidify through a chemical reaction to form a porous structure. When freely foaming a sponge, the raw material expands freely in an open or semi-open environment to form a continuous sponge block. During this process, the foaming uniformity directly determines the pore structure, density distribution, and mechanical properties of the sponge.

[0004] Existing foaming devices usually directly transport the mixed liquid to the foaming area through pipelines and then spread it by natural flow. Since the transported mixed liquid is concentrated in one area, there will inevitably be insufficient edge coverage, resulting in uneven thickness of the foam body.

[0005] In response to this, multiple nozzles arranged in a fan shape can be set to pump the mixed liquid. Through linear arrangement and angle optimization, the fan-shaped multi-nozzles can achieve natural fan-shaped spreading, with a more uniform coverage area. However, during the actual pumping process, due to the pressure attenuation of the pipeline for the linearly arranged nozzles (the pressure at the end is lower than that at the beginning), there will be a pressure gradient difference, still resulting in uneven nozzle flow rates and the defect of "thick in the middle and thin at both ends" in the spreading thickness. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-uniformity foaming device and its application in sponge production to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A high-uniformity foaming device, comprising:

[0009] A support frame, as well as a receiving plate and a fixing plate fixed on the support frame. A pair of symmetrically arranged conveying rollers are rotatably installed on the support frame, and a conveyor belt is sleeved on the conveying rollers.

[0010] It further includes:

[0011] A conveying cylinder is fixed on the receiving plate, and a pumping nozzle is fixed at the bottom of the conveying cylinder.

[0012] A buffer pressure boosting mechanism and a constant pressure pumping mechanism which cooperate with each other are arranged in the conveying cylinder. The buffer pressure boosting mechanism can drive the constant pressure pumping mechanism to move when the pressure in the conveying cylinder changes, and open the communication channel between the pumping nozzle and the conveying cylinder when the pressure reaches a predetermined threshold value.

[0013] A leveling mechanism is arranged on the fixed plate. The leveling mechanism includes two symmetrically arranged scrapers. The leveling mechanism is used to drive the scrapers to move bidirectionally in the horizontal direction and perform a spreading action on the mixed liquid on the conveyor belt.

[0014] As a further scheme of the present invention: The buffer pressure boosting mechanism includes a guide post fixed in the conveying cylinder. A limit ring is fixed at the end of the guide post. A piston disk that abuts and cooperates with the limit ring slides axially on the guide post.

[0015] As a further scheme of the present invention: The buffer pressure boosting mechanism further includes a push rod fixed to the side wall of the piston disk and passing through the conveying cylinder. A support plate is fixed at the end of the push rod. A first spring is sleeved on the push rod. Two ends of the first spring respectively abut against the piston disk and the inner wall of the conveying cylinder.

[0016] As a further scheme of the present invention: The constant pressure pumping mechanism includes a guide rail formed at the bottom of the conveying cylinder. A sealing plate is slidably installed in the guide rail. A plurality of discharge holes and through holes which are equidistantly distributed are formed on the conveying cylinder and the sealing plate. The discharge holes and the through holes are in mutual conduction and cooperation.

[0017] It further includes an elastic component and an adjusting component which are arranged on the sealing plate and connected to the support plate and used to switch the conduction state of the through holes through the sealing plate.

[0018] As a further scheme of the present invention: The elastic component includes a support sleeve fixed to the support plate. A support rod slides axially in the support sleeve. A movable plate is fixed at the end of the support rod. A second spring is sleeved on the support sleeve and the support rod. Two ends of the second spring respectively abut against the movable plate and the support plate.

[0019] As a further scheme of the present invention: The adjusting component includes a guide groove formed on the sealing plate. A support column which is slidably fitted with the guide groove is fixed on the movable plate.

[0020] As a further scheme of the present invention: The leveling mechanism includes a baffle fixed to the fixed plate. Guide grooves which are symmetrically arranged are formed on the baffle.

[0021] It further includes a translation component and a lifting component which are arranged on the fixed plate and connected to the guiding groove, and are used for guiding the scraper to move in the horizontal and vertical directions.

[0022] As a further solution of the present invention: the translation component includes a motor fixed on the fixed plate, a bidirectional lead screw rotatably installed on the fixed plate and connected to the output shaft of the motor, and symmetrically arranged threaded sleeves threadedly connected to the bidirectional lead screw.

[0023] As a further solution of the present invention: the lifting component includes a fixed rod fixed on the side wall of the threaded sleeve, a movable sleeve axially sliding on the fixed rod, a limiting column fixed on the side wall of the movable sleeve and slidably fitted into the guiding groove, and a connecting plate fixed on the limiting column and fixedly connected to the scraper.

[0024] An application of a high-uniformity foaming device in sponge production, including the high-uniformity foaming device described above.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: this application can ensure the uniform spreading of the mixed liquid by means of uniform pumping pressure to ensure the uniformity of subsequent foaming. Specifically, when the mixed liquid is conveyed into the conveying cylinder, through the cooperation of the buffer pressure increasing mechanism and the constant pressure pumping mechanism, the conveying cylinder is in a sealed state, and when the pressure in the conveying cylinder reaches the set threshold value, the buffer pressure increasing mechanism and the constant pressure pumping mechanism control the conveying cylinder to conduct, so as to ensure that the pumping pressures of each nozzle of the pumping nozzle are consistent, and avoid the problem of uneven flow rate of the pumping nozzle and uneven spreading thickness caused by the pressure gradient during pumping. When the mixed liquid is spread on the conveyor belt, under the action of the leveling mechanism, the mixed liquid that has not yet foamed is further leveled, further ensuring the uniformity of subsequent foaming;

[0026] By designing the differences in the sizes of the guiding holes, the discharge holes and the feeding passages of the pumping nozzles, and controlling the passage sizes at the edges to be larger, the resistance for the mixed liquid to pass through is smaller, the flow rate per unit time is higher, so as to compensate for the spacing loss from the pumping nozzle to the foaming area, thereby avoiding the problem of the kinetic energy attenuation when the mixed liquid is sprayed at the edge area and resulting in a thinner spreading thickness at the edge.

[0027] Through the cooperation of the support column and the guiding groove, when the pressure in the conveying cylinder reaches the set threshold value, the blocking force provided by the support column to the sealing plate will be converted into a greater conducting force. Therefore, at the initial stage when the discharge hole is conducting, even if the pressure in the conveying cylinder suddenly decreases due to discharging the mixed liquid, the force provided by the conducting force to the sealing plate can offset the restoring force generated by the pressure decrease, so as to ensure that the sealing plate will not reset and avoid the high-frequency oscillation caused by the pressure fluctuation in the conveying cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1Schematic structural diagram of an embodiment of a high-uniformity foaming device.

[0029] Figure 2 Schematic structural diagram of another angle in an embodiment of a high-uniformity foaming device.

[0030] Figure 3 Schematic connection diagram of a partial buffer pressurization mechanism, a partial constant-pressure pumping mechanism, and a leveling mechanism in an embodiment of a high-uniformity foaming device.

[0031] Figure 4 Schematic cross-sectional structural diagram of a conveying cylinder in an embodiment of a high-uniformity foaming device.

[0032] Figure 5 For Figure 4 Schematic enlarged structural diagram of the structure at A in

[0033] Figure 6 Schematic structural diagram of a partial constant-pressure pumping mechanism in an embodiment of a high-uniformity foaming device.

[0034] Figure 7 Schematic exploded structural diagram of a buffer pressurization mechanism and a constant-pressure pumping mechanism in an embodiment of a high-uniformity foaming device.

[0035] Figure 8 Schematic structural diagram of a leveling mechanism in an embodiment of a high-uniformity foaming device.

[0036] Figure 9 Schematic structural diagram of a partial leveling mechanism in an embodiment of a high-uniformity foaming device.

[0037] Figure 10 For Figure 9 Schematic enlarged structural diagram of the structure at B in

[0038] Figure 11 Schematic structural diagram of a partial leveling mechanism and a scraper in an embodiment of a high-uniformity foaming device.

[0039] In the figure: 1, support frame; 2, conveyor belt; 3, receiving plate; 4, fixing plate; 5, conveying cylinder; 501, discharge hole; 502, guide rail; 6, sealing plate; 601, through hole; 602, first inclined groove; 603, second inclined groove; 604, straight groove; 7, guide post; 701, limit ring; 8, piston disc; 9, push rod; 10, first spring; 11, support plate; 12, support sleeve; 13, support rod; 14, movable plate; 15, support column; 16, second spring; 17, feed pipe; 18, pumping nozzle; 19, baffle plate; 1901, first horizontal groove; 1902, third inclined groove; 1903, second horizontal groove; 1904, fourth inclined groove; 20, motor; 21, bidirectional lead screw; 22, threaded sleeve; 23, fixed rod; 24, movable sleeve; 25, limit post; 26, connecting plate; 27, scraper. Detailed implementation manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, which can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0042] Please refer to Figures 1 to 11 , in the embodiment of the present invention, a high-uniformity foaming device includes:

[0043] A support frame 1, and a receiving plate 3 and a fixing plate 4 fixed on the support frame 1. A pair of symmetrically arranged conveying rollers are rotatably installed on the support frame 1, and a conveyor belt 2 is sleeved on the conveying rollers;

[0044] It further includes:

[0045] A conveying cylinder 5 is fixed on the receiving plate 3, and a pumping nozzle 18 is fixed at the bottom of the conveying cylinder 5;

[0046] A buffer boosting mechanism and a constant pressure pumping mechanism are provided inside the conveying cylinder 5 and cooperate with each other. The buffer boosting mechanism can drive the constant pressure pumping mechanism to move when the pressure inside the conveying cylinder 5 changes, and open the communication channel between the pumping nozzle 18 and the conveying cylinder 5 when the pressure reaches a predetermined threshold value.

[0047] A leveling mechanism is provided on the fixing plate 4. The leveling mechanism includes two symmetrically arranged scraping plates 27. The leveling mechanism is used to drive the scraping plates 27 to move bidirectionally in the horizontal direction and perform a spreading action on the mixed liquid on the conveyor belt 2.

[0048] Specifically, the pumping nozzle 18 is composed of a plurality of nozzles distributed in a fan shape. A feed pipe 17 for conveying the mixed liquid is installed on the receiving plate 3 and is connected to the conveying cylinder 5. In the initial state, under the action of the buffer boosting mechanism and the constant pressure pumping mechanism, the conveying cylinder 5 and the pumping nozzle 18 are in a blocked state. When it is necessary to pump the mixed liquid required for the foamed sponge, the mixed liquid can be conveyed into the conveying cylinder 5 through the feed pipe 17. As the pumping volume gradually increases, the pressure inside the conveying cylinder 5 gradually increases, pushing the buffer boosting mechanism to move. The buffer boosting mechanism will also drive the constant pressure pumping mechanism to move. When the pressure inside the conveying cylinder 5 reaches the set value, the constant pressure pumping mechanism will control the connection between the conveying cylinder 5 and the pumping nozzle 18, and each nozzle of the pumping nozzle 18 is in a synchronous opening state, and the pressure of the pumped mixed liquid is consistent, so as to ensure that the amount of the mixed liquid dispersed on the conveyor belt 2 is relatively uniform. At the same time, under the action of the leveling mechanism, the two scraping plates 27 are controlled to move towards each other or away from each other to evenly spread the mixed liquid in some uneven areas on the conveyor belt 2, so as to ensure that during the subsequent foaming process, the foaming degree of the sponge is uniform.

[0049] Preferably, by controlling the connection between the conveying cylinder 5 and the pumping nozzle 18 only when the pressure inside the conveying cylinder 5 reaches the set value, it is possible to avoid problems such as pressure gradient differences caused by pressure attenuation from the initial pumping position to the end pumping position inside the conveying cylinder 5, resulting in uneven flow rate of the pumping nozzle 18 and uneven spreading thickness. At the same time, under the action of the pressure, the injection speed of the mixed liquid can be increased, thereby flushing the residues remaining in the pumping nozzle 18 and preventing the pumping nozzle 18 from being blocked.

[0050] Please refer to Figures 1 - 4 、 Figure 7, the buffer boosting mechanism includes a guide post 7 fixed in the delivery cylinder 5. A limit ring 701 is fixed at the end of the guide post 7. A piston disc 8 that axially slides on the guide post 7 and abuts against the limit ring 701 in a mating manner is provided. The buffer boosting mechanism further includes a push rod 9 fixed to the side wall of the piston disc 8 and passing through the delivery cylinder 5. A support plate 11 is fixed to the end of the push rod 9. A first spring 10 is sleeved on the push rod 9. Two ends of the first spring 10 respectively abut against the piston disc 8 and the inner wall of the delivery cylinder 5.

[0051] Please refer to Figure 4 , specifically, in the initial state, the delivery cylinder 5 is not filled with the mixed liquid. The first spring 10 is in a compressed state, such that the piston disc 8 is located at the end of the stroke on the side facing the limit ring 701 and abuts against the limit ring 701, so that the distance between the support plate 11 and the side wall of the delivery cylinder 5 is minimized.

[0052] When it is necessary to pump the mixed liquid, if the mixed liquid is directly discharged through the feed pipe 17, the pumping pressure of one of the pumping nozzles 18 at the position closest to the feed pipe 17 is necessarily the largest, and the pumping pressure of one of the pumping nozzles 18 farthest from the feed pipe 17 is the smallest. This will cause the paving thickness of the mixed liquid pumped onto the conveyor belt 2 to be thick in the middle and thin at both ends. Therefore, under the action of the piston disc 8, the delivery cylinder 5 is controlled to be in a blocked state through the constant-pressure pumping mechanism.

[0053] When the feed pipe 17 conveys the mixed liquid into the delivery cylinder 5, as the amount in the delivery cylinder 5 gradually increases, the pressure in the delivery cylinder 5 gradually increases and acts on the piston disc 8, causing the piston disc 8 to move in a direction away from the limit ring 701, so that the first spring 10 is compressed. The piston disc 8 will also drive the support plate 11 to move through the push rod 9, thereby driving the constant-pressure pumping mechanism to move. When the pressure in the delivery cylinder 5 reaches the set threshold value, the constant-pressure pumping mechanism will control the delivery cylinder 5 to communicate with the pumping nozzle 18, thereby ensuring that the pressure of the mixed liquid pumped by the pumping nozzle 18 remains consistent, so as to ensure that the mixed liquid pumped onto the conveyor belt 2 is in a uniform paving state.

[0054] Please refer to Figures 1 - 7, the constant-pressure pumping mechanism includes a guide rail 502 formed at the bottom of the delivery cylinder 5. A sealing plate 6 is slidably installed in the guide rail 502. A plurality of discharge holes 501 and guide through holes 601 are formed on the delivery cylinder 5 and the sealing plate 6 at equal intervals, and the discharge holes 501 and the guide through holes 601 are in conduction and cooperation with each other; it also includes an elastic component and an adjustment component arranged on the sealing plate 6 and connected to the support plate 11 for switching the conduction state of the guide through holes 601 through the sealing plate 6. The elastic component includes a support sleeve 12 fixed on the support plate 11. A support rod 13 slides axially in the support sleeve 12. A movable plate 14 is fixed at the end of the support rod 13. A second spring 16 is sleeved on the support sleeve 12 and the support rod 13. The two ends of the second spring 16 are respectively abutted against the movable plate 14 and the support plate 11. The adjustment component includes a guide groove formed on the sealing plate 6. A support column 15 that is slidably fitted with the guide groove is fixed on the movable plate 14.

[0055] Please refer to Figure 4 , Figure 5 , it should be noted that the guide groove can be divided into three sections, namely a first inclined groove 602, a second inclined groove 603, and a straight groove 604. The two ends of the second inclined groove 603 are connected to one end of the first inclined groove 602 and the straight groove 604. The first inclined groove 602 and the second inclined groove 603 form a V-shaped structure, and the inclination angle of the first inclined groove 602 is smaller than that of the second inclined groove 603. In the initial state, the piston disc 8 is in an abutting state with the limit ring 701, so that the distance between the support plate 11 and the delivery cylinder 5 is the smallest, so that the support column 15 is located at the end of the stroke on the side of the first inclined groove 602 away from the second inclined groove 603. At this time, the second spring 16 is in a compressed state, so as to provide a force for the support column 15 to move away from the support sleeve 12 through the movable plate 14. Under the action of the support column 15, a force is provided for the sealing plate 6 to move away from the first inclined groove 602 in the direction of the straight groove 604 through the first inclined groove 602. Since the force in this direction is used to limit the conduction between the guide through holes 601 and the discharge holes 501, the force in this direction can be defined as a blocking force. Similarly, the force opposite to the blocking force is defined as a conduction force. And the sealing plate 6 is located at the end of the stroke on one side of the guide rail 502. Therefore, the position of the sealing plate 6 remains unchanged;

[0056] When the mixed liquid enters the conveying cylinder 5 through the feed pipe 17, as the mixed liquid gradually increases, the pressure inside the conveying cylinder 5 gradually increases, thereby pushing the piston disc 8 to move in a direction away from the limit ring 701. The piston disc 8 will drive the support plate 11 to move through the push rod 9, thereby driving the support sleeve 12 to move. The support sleeve 12 will drive the support column 15 to slide along the first inclined groove 602 through the support rod 13 and the movable plate 14. Under the guidance of the first inclined groove 602, the support column 15 moves towards the support sleeve 12 to compress the second spring 16. The blocking force provided by the support column 15 to the sealing plate 6 through the first inclined groove 602 gradually increases. In this regard, when the piston disc 8 moves in a direction away from the limit ring 701, it needs to overcome the double resistance of the first spring 10 and the second spring 16;

[0057] When the pressure inside the conveying cylinder 5 reaches the set threshold value, the support column 15 just crosses the first inclined groove 602 and enters the second inclined groove 603. Since the inclination direction of the second inclined groove 603 is opposite to that of the first inclined groove 602, the second spring 16 elastically releases, causing the support column 15 to have a tendency to move in a direction away from the support sleeve 12, so as to convert the blocking force into a conducting force through the second inclined groove 603. And the inclination angle of the second inclined groove 603 is greater than that of the first inclined groove 602, and the conducting force provided by the support column 15 to the sealing plate 6 will be greater than the blocking force. In this way, the sealing plate 6 will quickly slide along the length direction of the guide rail 502, so that the guide through hole 601 quickly moves to the position where it is communicated with the discharge hole 501. At this time, the mixed liquid inside the conveying cylinder 5 will enter the pumping spray head 18 through the discharge hole 501 and the guide through hole 601, thereby realizing that the mixed liquid is discharged onto the conveyor belt 2 through multiple spray heads of the pumping spray head 18 with the same pressure, ensuring that the mixed liquid placed on the conveyor belt 2 is paved more evenly;

[0058] Among them, the spray inclination angles of the spray heads located in the two side edge regions of the pumping spray head 18 are the largest, which means that the distance between the mixed liquid and the conveyor belt 2 is the largest. This may cause the kinetic energy of some spray heads in the edge region to decay when spraying the mixed liquid, resulting in a thinner paving thickness at the edge. The guide through hole 601, the discharge hole 501, and the feeding path of the pumping spray head 18 correspond to each other, and the sizes of all of them are the smallest in the middle and gradually increase in the direction of both sides. The simultaneous opening of the small hole in the middle and the large holes at the edges, because the path sizes at the edges are larger, the resistance for the mixed liquid to pass through is smaller, and the flow rate per unit time is higher, thereby compensating for the spacing loss from the pumping spray head 18 to the foaming region.

[0059] Preferably, when the support column 15 passes over the first slant groove 602 and enters the second slant groove 603, the blocking force provided by the support column 15 to the sealing plate 6 will be converted into a larger conducting force. Therefore, in the early stage of the discharge hole 501 being conducted, even if the pressure in the delivery cylinder 5 suddenly decreases due to the discharge of the mixed liquid, the force provided to the sealing plate 6 by the conducting force can offset the reset force generated by the pressure reduction, so as to ensure that the sealing plate 6 will not be reset, and avoid high-frequency oscillation caused by the pressure fluctuation in the delivery cylinder 5;

[0060] If the foaming thickness needs to be increased, it means that the pressure in the delivery cylinder 5 still needs to be increased, and the support column 15 will enter the straight groove 604. Under the action of the straight groove 604, it can ensure that the support column 15 can slide freely, thereby through the cooperation of the piston plate 8 and the first spring 10, a certain buffering effect is played on the mixed liquid in the delivery cylinder 5, preventing the problem of uneven pumping caused by pressure fluctuations, and avoiding interference with the sealing plate 6, causing the sealing plate 6 to move, resulting in changes in the conduction size.

[0061] See also Figure 1 , Figure 2 , Figures 8 - 11 The scraping mechanism includes a baffle 19 fixed on the fixed plate 4, and a symmetrical guide groove is formed on the baffle 19; it also includes a translation component and a lifting component arranged on the fixed plate 4 and connected to the guide groove, for guiding the scraper 27 to move in the horizontal and vertical directions, the translation component includes a motor 20 fixed on the fixed plate 4, a bidirectional screw rod 21 connected to the output shaft of the motor 20 is rotatably mounted on the fixed plate 4, and a symmetrically arranged threaded sleeve 22 is threadedly connected on the bidirectional screw rod 21, and the lifting component includes a fixed rod 23 fixed to the side wall of the threaded sleeve 22, and the fixed rod 23 is axially slidable with a movable sleeve 24, and a limit column 25 slidably engaged with the guide groove is fixed to the side wall of the movable sleeve 24, and a connecting plate 26 fixedly connected to the scraper 27 is fixed on the limit column 25.

[0062] Furthermore, the guide groove can be divided into four sections, namely the first transverse groove 1901, the third inclined groove 1902, the second transverse groove 1903, and the fourth inclined groove 1904, and the first transverse groove 1901, the third inclined groove 1902, the second transverse groove 1903, and the fourth inclined groove 1904 are connected to each other in sequence from head to tail. In the initial state, under the action of the bidirectional screw 21, the distance between the two threaded sleeves 22 is minimized so that the limit column 25 is located at the connection position between the first transverse groove 1901 and the fourth inclined groove 1904. At this time, the movable sleeve 24 is located at the end of the stroke away from the threaded sleeve 22, the distance between the two scrapers 27 is the smallest, and is located at the end of the stroke toward the conveyor belt 2. The distance between the scraper 27 and the conveyor belt 2 is the required paving thickness of the mixed liquid.

[0063] Since the mixed liquid itself has a certain fluidity, and the mixed liquid sprayed by the pumping nozzle 18 may have a certain overlapping area, which will cause the thickness of some mixed liquid to exceed the average range. In this regard, the scraper 27 can be used to level the unmixed liquid. At this time, the motor 20 works and drives the bidirectional lead screw 21 to rotate, thereby driving the two threaded sleeves 22 to move. The threaded sleeve 22 will also drive the fixed rod 23 to move, so as to control the limit post 25 to slide along the first horizontal groove 1901 through the movable sleeve 24. Under the action of the scraper 27, the mixed liquid placed on the conveyor belt 2 is leveled. Due to the guiding effect of the limit post 25 and the guiding groove, it can ensure that the threaded sleeve 22 moves along the length direction of the bidirectional lead screw 21 and does not rotate with the bidirectional lead screw 21;

[0064] When the limit post 25 disengages from the first horizontal groove 1901 and enters the third inclined groove 1902, it indicates that the leveling action of the scraper 27 on the mixed liquid is completed. The accumulated materials generated during the leveling of the scraper 27 are located on both sides of the conveyor belt 2, and through the fluidity of the mixed liquid itself, the edge area is adaptively compensated. At this time, the limit post 25 will drive the movable sleeve 24 to slide axially along the fixed rod 23 and move towards the threaded sleeve 22, so that the scraper 27 is separated from the mixed liquid. When the limit post 25 moves to the position where the third inclined groove 1902 is connected to the second horizontal groove 1903, the distance between the movable sleeve 24 and the threaded sleeve 22 is the smallest. Since there is damping provided on the movable sleeve 24 and the fixed rod 23, it can ensure that the movable sleeve 24 will not slide due to gravity when no external force is applied. At this time, the motor 20 controls the bidirectional lead screw 21 to reverse, so that the limit post 25 slides along the second horizontal groove 1903. When the limit post 25 disengages from the second horizontal groove 1903 and enters the fourth inclined groove 1904, the movable sleeve 24 moves away from the threaded sleeve 22 until the limit post 25 returns to the connection position of the fourth inclined groove 1904 and the first horizontal groove 1901, and the two scrapers 27 are reset. Repeat the above steps to achieve the effect of leveling the uneven area of the mixed liquid and compensating the edge area of the mixed liquid.

[0065] An application of a high-uniformity foaming device in sponge production, including the described high-uniformity foaming device.

[0066] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0067] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high uniformity foaming device, comprising: A support frame, and a receiving plate and a fixing plate fixed on the support frame, wherein symmetrically arranged conveying rollers are rotatably mounted on the support frame, and a conveying belt is sleeved on the conveying rollers; It is characterized by further comprising: A delivery cylinder is fixed on the receiving plate, and a pumping nozzle is fixed on the bottom of the delivery cylinder; The delivery cylinder is provided with a buffer pressurizing mechanism and a constant pressure pumping mechanism that cooperate with each other. The buffer pressurizing mechanism can drive the constant pressure pumping mechanism to move when the pressure in the delivery cylinder changes, and open the communication channel between the pumping nozzle and the delivery cylinder when the pressure reaches a predetermined threshold; The fixed plate is provided with a scraping mechanism, which includes two scrapers symmetrically arranged. The scraping mechanism is used to drive the scrapers to move bidirectionally in a horizontal direction and perform a paving action on the mixed liquid on the conveyor belt.

2. A high uniformity foaming device according to claim 1, characterized in that: The buffer pressurizing mechanism comprises a guide column fixed in the delivery cylinder, a limit ring is fixed at the end of the guide column, and a piston disk that abuts against the limit ring and slides axially on the guide column.

3. A high uniformity foaming device according to claim 2, characterized in that: The buffer boost mechanism also includes a push rod fixed to the side wall of the piston disc and passing through the delivery cylinder, a support plate is fixed to the end of the push rod, a first spring is sleeved on the push rod, and two ends of the first spring are respectively in contact with the piston disc and the inner wall of the delivery cylinder.

4. A high uniformity foaming device according to claim 3, characterized in that: The constant pressure pumping mechanism comprises a guide rail formed at the bottom of the delivery cylinder, a sealing plate is slidably mounted in the guide rail, a plurality of discharge holes and conduction holes are formed on the delivery cylinder and the sealing plate and are equidistantly distributed, and the discharge holes and the conduction holes are mutually connected and matched; It also includes an elastic component and an adjusting component which are arranged on the sealing plate and connected to the supporting plate and are used to switch the conducting state of the conducting hole through the sealing plate.

5. A high uniformity foaming device according to claim 4, characterized in that: The elastic component includes a support sleeve fixed on the support plate, a support rod axially sliding in the support sleeve, a movable plate fixed at the end of the support rod, a second spring is sleeved on the support sleeve and the support rod, and two ends of the second spring are respectively in contact with the movable plate and the support plate.

6. A high uniformity foaming device according to claim 5, characterized in that: The adjustment assembly comprises a guide groove formed on the sealing plate, and a support column slidably engaged with the guide groove is fixed on the movable plate.

7. The high uniformity foaming equipment according to claim 1, characterized in that: The scraping mechanism comprises a baffle fixed on the fixed plate, and the baffle is formed with symmetrically arranged guide grooves; It also includes a translation component and a lifting component which are arranged on the fixing plate and connected to the guide groove and are used to guide the scraper to move in the horizontal and vertical directions.

8. A high uniformity foaming device according to claim 7, characterized in that: The translation assembly includes a motor fixed on the fixed plate, a bidirectional screw connected to the output shaft of the motor is rotatably mounted on the fixed plate, and a symmetrically arranged threaded sleeve is threadedly connected to the bidirectional screw.

9. A high uniformity foaming device according to claim 8, characterized in that: The lifting assembly includes a fixed rod fixed to the side wall of the threaded sleeve, the fixed rod is axially slidable with a movable sleeve, the side wall of the movable sleeve is fixed with a limiting column slidably engaged with the guide groove, and the limiting column is fixed with a connecting plate fixedly connected to the scraper.

10. Application of a high uniformity foaming device in sponge production, characterized in that: It comprises the high uniformity foaming equipment as described in any one of claims 1 to 9.

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