Sponge drum forming mold, sponge drum, and forming method

Abstract

The present application provides a sponge roller forming die, a sponge roller and a forming method. The sponge roller forming die can form grooves along the length direction of the roller sponge surface. The sponge roller forming die comprises a sponge forming sleeve for making the roller sponge and left and right fixing covers for fixing the roller shaft core during forming. The sponge forming sleeve is provided with a die cavity with a diameter larger than that of the roller shaft core. After the left and right fixing covers are fixed with the sponge forming sleeve and the roller shaft core, a roller sponge forming cavity is formed. The inner wall of the die cavity is provided with at least one set of wave-shaped arc surface structures along the radial direction of the roller. Each set of wave-shaped arc surface structures comprises a first wave-shaped arc surface and a second wave-shaped arc surface arranged between two first wave-shaped arc surfaces. The gap between each adjacent first wave-shaped arc surface and second wave-shaped arc surface is different. The sponge roller comprises a roller body and a roller sponge installed on the circumferential surface of the roller body. One side of each groove of the roller sponge forms a cleaning scraper with the intersection surface of the roller sponge surface.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202111035108.0 entitled "A sponge roller, molding die and molding method", the contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of cleaning equipment technology, and in particular to a sponge roller forming mold, a sponge roller, and a forming method. Background Technology

[0003] The sweeping and mopping unit uses a roller, which is typically made of PVA sponge. The high density, high absorbency, low cost, and easy availability of PVA sponge make it a valuable cleaning component in the unit. After installation, a specific mechanical structure is used to squeeze and press the roller, allowing for repeated cleaning and reuse.

[0004] Sponge rollers typically require simple polishing after molding to create a slightly rough surface. Combined with the inherent porosity of sponges, this slightly rough surface (excluding the porous areas) of the sponge roller becomes increasingly smoother with prolonged friction against the surface being cleaned. This increases the actual contact area between the sponge material and the surface, leading to greater resistance during cleaning, increased energy consumption, shorter battery life, and a deteriorating user experience over time. The question then becomes: how can we provide a more durable sponge roller to improve the user experience and address the issue of diminishing returns over time? Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a sponge roller, a molding die, and a molding method, wherein the sponge roller can avoid increased power consumption and deterioration of user experience due to increased friction caused by prolonged use of the sponge roller.

[0006] To solve the above problems, in a first aspect, the present invention provides a sponge roller forming mold for forming a sponge roller, which can form grooves distributed along its length direction on the surface of the roller sponge.

[0007] The sponge roller forming mold includes a sponge shaping sleeve for making the roller sponge and left and right fixing covers for fixing the roller core during forming. The sponge shaping sleeve has a mold cavity with a diameter larger than the roller core. After the left and right fixing covers are fixed to the sponge shaping sleeve and the roller core, a roller sponge forming cavity is formed so that the distance between the roller core surface and the mold cavity is the same. The inner wall of the mold cavity has at least one set of wavy arc surface structures along the radial cross section of the roller. Each set of wavy arc surface structures includes a first wavy arc surface and a second wavy arc surface set between two first wavy arc surfaces. The gap between each adjacent first wavy arc surface and second wavy arc surface is different.

[0008] In one or more alternative embodiments, the wavy arc surface structure has a wavy arc surface arranged along the axial length direction of the roller body, and each wavy arc surface is composed of multiple spaced protrusions, with grooves between adjacent protrusions.

[0009] In one or more alternative embodiments, the inner wall of the mold cavity is provided with three sets of wavy arc surface structures.

[0010] In one or more alternative embodiments, the first wavy arc surface is formed by two convex strips and three grooves spaced apart; the second wavy arc surface is formed by three convex strips and four grooves spaced apart.

[0011] In one or more alternative embodiments, the left and right fixing covers include a left fixing cover and a right fixing cover, each having a first fixing step and a second fixing step arranged coaxially. The first fixing step is fixed to the roller shaft and positioned at the axis of the sponge shaping sleeve, and the second fixing step is fixed to the sponge shaping sleeve. A sealing ring is provided between the second fixing step and the sponge shaping sleeve.

[0012] In one or more alternative embodiments, the groove has a depth of 1-2 mm, a width greater than 0.5 mm, and a ridge width greater than 0.5 mm.

[0013] In one or more alternative embodiments, the width of the protrusion is the same as the width of the groove.

[0014] In one or more alternative embodiments, the wavy arc surface area occupies 1 / 4 to 1 / 3 of the circumferential surface of the cylindrical sponge.

[0015] In one or more alternative embodiments, the wavy arc surface is arranged in a spiral or arc shape along the length of the cylindrical sponge.

[0016] In a second aspect, the present invention provides a sponge roller made using the sponge roller molding mold as described in the first aspect, characterized in that it includes a roller body and a roller sponge installed on the circumferential surface of the roller body, the surface of the roller sponge is provided with a plurality of grooves along the circumferential direction and along the length direction of the roller body, the plurality of grooves are evenly distributed along the circumferential direction and along the length direction of the surface of the roller sponge, and one side of each groove forms a cleaning scraper at the interface with the surface of the roller sponge.

[0017] In one or more alternative embodiments, the roller body is made of a cylindrical plastic tube or a metal tube.

[0018] In one or more alternative embodiments, the roller shaft is provided with a shaft cover and a bearing located between the roller shaft and the roller body, as well as a retaining ring for fixing the bearing and a retaining cover for protecting the bearing and the retaining ring.

[0019] In one or more alternative embodiments, a spring is fitted at one end of the roller shaft to ensure that the roller shaft has a certain amount of axial movement.

[0020] In one or more alternative embodiments, one end of the roller shaft is further provided with a transmission groove, which cooperates with the drive motor shaft to achieve extensibility in the length direction and to transmit rotational torque.

[0021] In one or more alternative embodiments, the roller shaft is further provided with a limiting structure to restrict its extension length. The limiting structure may be a limiting ring that is integral with or separate from the roller shaft.

[0022] In one or more alternative embodiments, when the roller sponge rotates, the cleaning scraper can create a scraping action with the cleaning surface, improving the cleaning effect of stubborn garbage.

[0023] In one or more alternative embodiments, the groove has a cavity inside, which can scrape away liquid on the cleaning surface and collect particulate solids through the groove.

[0024] In one or more alternative embodiments, the groove is configured to have a trapezoidal cross-section, or one side of the groove has a beveled structure.

[0025] In one or more alternative embodiments, the width between two adjacent grooves is greater than 0.5 mm.

[0026] In one or more alternative embodiments, the distance between two adjacent grooves is the same as the width of the groove.

[0027] In one or more alternative embodiments, the area of ​​the groove occupies 1 / 4 to 1 / 2 of the circumferential surface of the roller sponge.

[0028] In one or more alternative embodiments, the groove is spiral, arc-shaped, or strip-shaped along the length of the roller sponge.

[0029] In one or more alternative embodiments, the two sides of the groove are configured to be vertical or approximately vertical;

[0030] During operation, at least one side of the groove is a slope.

[0031] In one or more alternative embodiments, during operation, the inclined plane forms an angle of less than 90 degrees with the surface of the roller sponge.

[0032] In one or more alternative embodiments, the surface of the roller sponge is distributed with inner layer regions that expose the inner layer of the roller sponge, and these inner layer regions are spaced apart.

[0033] Thirdly, the present invention also provides a method for forming a sponge roller as described in the second aspect, characterized in that it includes:

[0034] The sponge roller forming step involves forming a groove structure on the sponge roller using a special mold.

[0035] The sponge roller cutting process involves cutting the surface of the polished sponge roller and bending both ends of the sponge roller.

[0036] In one or more alternative embodiments, a roller sponge surface polishing step is included before the sponge roller cutting step. When polishing the surface film of the roller sponge, a partially worn area that exposes the inner layer of the sponge roller appears on the surface of the roller sponge, and the worn area is evenly distributed on the surface of the sponge roller.

[0037] In one or more alternative embodiments, the chamfer length is 3-7mm and the chamfer angle ranges from 30-70 degrees.

[0038] In one or more alternative embodiments, the sponge roller surface polishing step involves a spacing of 0.2-1.0 mm between the inner sponge layer regions distributed on the sponge roller surface.

[0039] This invention provides a sponge roller, a molding die, and a molding method. The sponge roller includes a roller body and a sponge roller mounted on the circumferential surface of the roller body. The surface of the sponge roller has grooves along the length of the roller body. Because the sponge roller surface has grooves, and because the junction of the groove side and the sponge roller surface forms a cleaning blade structure, the sponge surface at this junction is relatively dense during molding, resulting in a better cleaning effect on stubborn debris, such as debris adhering to the cleaning surface. Simultaneously, due to the presence of the grooves, the contact area formed with the cleaning surface during cleaning is small, thus generating less friction. This reduces the likelihood of increased motor power and noise due to high massage force, reduces the power consumption of the cleaning device, and improves the wear resistance of the sponge roller. Furthermore, the presence of the grooves, especially the inclined structure on one side of the grooves, effectively removes liquid from the cleaning surface. Particulate solids can also be collected through the special structure of the grooves. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the description only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is an exploded view of the structure of an embodiment of the sponge roller of the present invention.

[0042] Figure 2 This is a schematic cross-sectional view along the axial direction of an embodiment of the sponge roller of the present invention.

[0043] Figure 3 This is another schematic diagram of the cross-sectional structure along the axial direction of an embodiment of the sponge roller of the present invention.

[0044] Figure 4 This is a schematic diagram of the structure of the sponge roller embodiment of the present invention along the axial direction.

[0045] Figure 5 This is a schematic cross-sectional view of the sponge roller in an embodiment of the present invention, perpendicular to the axis.

[0046] Figure 6 for Figure 5 Enlarged schematic diagram of part A in the middle.

[0047] Figure 7 This is a schematic diagram of another embodiment of the roller sponge, viewed in cross-section perpendicular to the axis.

[0048] Figure 8This is a schematic diagram of the structure of an embodiment of the roller sponge molding mold of the present invention.

[0049] Figure 9 for Figure 8 A schematic diagram of the structure in cross-section along the axial direction.

[0050] Figure 10 This is a schematic diagram of the sponge roller forming method of the present invention.

[0051] Figure 11 This is a schematic diagram of the surface structure of the roller sponge before it is polished after molding according to the present invention.

[0052] Figure 11a This is a schematic diagram of the surface structure after polishing in the roller sponge molding method of the present invention.

[0053] Figure 11b This is a magnified 50x diagram of the surface structure after polishing in the roller sponge molding method of the present invention.

[0054] Figure 11c This is a magnified 100x diagram showing the surface structure before and after grinding in the roller sponge molding method of the present invention.

[0055] Figure label:

[0056] Roller sponge B1, drive motor B10, motor shaft B101, groove B11, roller sponge surface B12, cleaning scraper B13;

[0057] Drum body B2, cylindrical tube B21;

[0058] Roller shaft core B3, limiting structure B31, transmission groove B32;

[0059] Fixed cover B5;

[0060] Spring B6;

[0061] Bearing B7;

[0062] Snap ring B8;

[0063] Roller body 10;

[0064] Cylindrical sponge 11, first wavy arc surface 112, second wavy arc surface 113;

[0065] 20mm foam shaping sleeve;

[0066] Drum shaft core 21;

[0067] Right fixed cover 22;

[0068] Left fixed cover 23, first fixed step 231, second fixed step 232.

[0069] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0070] The claims of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of the present invention.

[0071] It should be understood that, in the description of the embodiments of the present invention, all directional indicating terms, such as "up," "down," "left," "right," "front," and "back," indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the product is in use. These terms are merely for the purpose of simplifying the description of the present invention and do not explicitly or implicitly suggest that the device, element, or component referred to must have a specific orientation or specific orientational structure, and should not be construed as a limitation of the present invention. They are only used to explain the relative positional relationships and movements between the components shown in the accompanying drawings. When this specific orientation changes, the directional indication may also change accordingly.

[0072] Furthermore, in this invention, ordinal numbers such as "first" and "second" are used for distinguishing purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, the features referred to as "first" and "second" may explicitly or implicitly include at least one of those technical features. In the description of this invention, "a plurality of" means at least two, i.e., two or more, unless otherwise explicitly defined; "at least one" means one or more.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-in" should be interpreted broadly. For example, they can refer to a relatively fixed positional relationship between components, or a physically fixed connection between components; they can be detachable connections or integral structures; they can be mechanical connections or electrical signal connections; they can be direct connections or indirect connections through intermediate media or components; they can refer to the internal communication of two elements or the interaction between two elements. Unless otherwise explicitly limited in the specification, other interpretations will not achieve the corresponding functions or effects. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0074] If the controllers or control circuits involved in this invention are conventional control technologies or units for those skilled in the art, such as the control circuits of the controllers, they can be implemented by those skilled in the art using existing methods, such as simple programming. Regarding software or programs that work with hardware to achieve control results, unless the description provides a detailed explanation of the control process of the software or programs involved, this pertains to the use of existing technology or conventional techniques for those skilled in the art. The power supply also employs existing technology in the art. Furthermore, since the main inventive aspect of this invention lies in the improvement of the mechanical device, this invention will not provide a detailed explanation of the specific circuit control relationships and circuit connections.

[0075] This invention discloses many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described herein. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0076] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0077] like Figure 1 - Figure 6 As shown, the present invention provides an embodiment of a sponge roller.

[0078] The sponge roller includes a roller body B2 and a roller sponge B1 mounted on the circumferential surface of the roller body B2, wherein the surface of the roller sponge B1 has a groove B11 along the length direction of the roller body B2.

[0079] Specifically, the sponge roller includes a roller body B2, which is composed of a cylindrical plastic tube or metal tube B21. One end of the roller body B2 is equipped with a drive motor B10 that drives the sponge roller to rotate, and the other end is equipped with a roller shaft B3 that is axially movably connected to the drive motor shaft B101. The roller shaft B3 is equipped with a shaft cover B4, a bearing B7 located between the roller shaft B3 and the roller body B2, a retaining ring B8 for fixing the bearing B7, and a fixing cover B5 to protect the bearing B7 and the retaining ring B8. A spring B6 is fitted at one end of the roller shaft B3 to ensure a certain amount of axial movement, facilitating installation and disassembly. A transmission groove B32 is provided at one end of the roller shaft B3, which cooperates with the drive motor shaft B101 to achieve extension and retraction in the length direction and to transmit rotational torque. The roller shaft core B3 is also provided with a limiting structure B31 to limit its extension and retraction length. The limiting structure B31 can be a limiting ring that is integral with or separate from the roller shaft core B3.

[0080] The grooves B11 are evenly distributed along the length of the surface of the roller sponge B1, and their number can be set as needed, such as several. Since the two sides of the grooves B11 can be set to be perpendicular or nearly perpendicular, a cleaning scraper B13 can be formed at the contact surface between the surface B12 and the side B11 of the roller sponge B1. Because the roller sponge B1 forms a relatively dense structure with the mold contact surface during molding, the cleaning scraper B13 has a good cutting effect on stubborn debris on the cleaning surface during cleaning. Figure 4 As shown, when the roller sponge B1 rotates in the F direction, the cleaning scraper B13 can form a scraping action with the cleaning surface, which can effectively remove stubborn garbage. Even if it cannot completely remove it, it can cut larger stubborn garbage for cleaning, thereby improving the cleaning effect of stubborn garbage.

[0081] Meanwhile, the cavity inside groove B11 allows liquid to be scraped away from the cleaning surface, making it suitable for scenarios with a large amount of liquid on the cleaning surface. Furthermore, granular solids can be collected through groove B11, preventing situations where granular and powdery debris are mixed, where the presence of granular debris prevents the roller sponge surface from making contact with the cleaning surface or results in a small contact area, thus hindering the removal of granular and powdery debris in one go and improving cleaning efficiency.

[0082] Depending on the needs, the groove B11 can be configured with a trapezoidal cross-section or a sloping structure on one side. This improves the cleaning effect of the scraper B13 and also enhances its ability to handle liquids or particulate solids during the cleaning process. The depth of the groove B11 is 1-2 mm, and its width is greater than 0.5 mm. Furthermore, the distance between two adjacent grooves B11 should be greater than 0.5 mm. Experiments have shown that this configuration provides better cleaning performance, balancing cleaning efficiency and the lifespan of the roller sponge B1. Alternatively, setting the distance between two adjacent grooves B11 to be the same as the width of the groove B11 also achieves good cleaning performance and wear resistance.

[0083] Depending on the requirements, the area of ​​the groove B11 occupies 1 / 4 to 1 / 2 of the circumferential surface of the roller sponge. The groove is spiral, arc-shaped, or strip-shaped along the length of the roller sponge, with spiral and arc shapes showing better results through testing. At least one side of the groove B11 is a slope, which forms an angle of less than 90 degrees with the surface of the roller sponge.

[0084] As needed, in order to ensure that the roller sponge has appropriate friction and cleaning efficiency, there are inner layer areas (not shown in the figure) that expose the inner layer of the roller sponge on the surface of the roller sponge. These inner layer areas are distributed at intervals.

[0085] like Figure 7 As shown, the grooves B11 on the surface of the roller sponge are smoothly connected, which can also achieve a cleaning effect. Through experimental comparison, the effect of this embodiment is slightly worse than that of the above embodiment.

[0086] like Figure 8 - Figure 9 As shown, the present invention provides an embodiment of a roller sponge molding die.

[0087] The roller sponge molding die has the sponge roller structure described in the above embodiment, that is, the molding can form grooves B11 distributed along the length direction on the surface of the roller sponge.

[0088] Specifically, the sponge roller forming mold includes a sponge shaping sleeve 20 for making the roller sponge and left and right fixing covers for fixing the roller core 21 during forming. The sponge shaping sleeve 20 has a mold cavity with a diameter larger than the roller core. After the left and right fixing covers are fixed with the sponge shaping sleeve 20 and the roller core 21, the roller sponge forming cavity is formed with the same distance between the surface of the roller core and the mold cavity. The inner wall of the mold cavity has a sponge roller structure, that is, the inner wall of the mold cavity has at least one set of wavy arc surface structure along the radial cross section of the roller, which is used to form the structure described in the above embodiment on the surface of the roller sponge during the forming process.

[0089] Specifically, the left fixed cover 23 and the right fixed cover 22 are each provided with two fixed steps, namely a first fixed step 231 and a second fixed step 232. The first fixed step 231 is fixed to the roller shaft core 21 and positioned around the circumference of the sponge shaping sleeve 20, while the second fixed step 232 is fixed to the sponge shaping sleeve 20. The first fixed step 231 and the second fixed step 231 are coaxially arranged. A sealing ring (not shown in the attached figure) is provided between the second fixed step 231 and the sponge shaping sleeve 20 to prevent the sponge foam from being exposed during molding, which would affect the appearance and subsequent processing.

[0090] The wavy arc surface structure includes three sets of wavy arc surface structures. Each set of wavy arc surface structures includes a first wavy arc surface 112 and a second wavy arc surface 113 disposed between two first wavy arc surfaces 112. The first wavy arc surfaces 112 and the second wavy arc surfaces 113 are evenly distributed in the circumferential direction on the surface of the cylindrical sponge 11. The wavy arc surface structure has wavy arc surfaces arranged along the axial length direction of the roller body 10.

[0091] Each wavy arc surface is composed of multiple spaced protrusions, with grooves between adjacent protrusions. The number of protrusions and grooves is set as needed. In this embodiment, the first wavy arc surface 112 is formed by two protrusions and three grooves spaced apart; the second wavy arc surface 113 is formed by three protrusions and four grooves spaced apart.

[0092] Because the surface of the sponge roller has a wavy arc structure, it generates greater friction with the cleaning surface during use, making it easier to clean up debris. At the same time, the gaps between each adjacent first wavy arc surface 112 and second wavy arc surface 113 are different. When the roller is working, the varying gaps create different levels of friction between its surface and the cleaning surface, making it easier to remove stubborn debris.

[0093] Through testing, it was found that a groove (not shown in the attached diagram) with a depth of 1-2 mm and a width greater than 0.5 mm, along with a raised strip with a width greater than 0.5 mm, resulted in better cleaning performance. Furthermore, having the same width for both the raised strip and the groove further improved the cleaning effect.

[0094] Depending on the requirements, the wavy arc surface area occupies 1 / 4 to 1 / 3 of the circumferential surface of the cylindrical sponge, resulting in the best cleaning effect. Depending on the requirements, the wavy arc surface is arranged in a spiral or arc shape along the length of the cylindrical sponge 11. This ensures that only part of the cleaning contact surface is in contact during cleaning, reducing the workload of the motor on the roller without affecting the cleaning effect.

[0095] As needed, the surface of the roller sponge has inner layer areas that expose the inner layer of the roller sponge, and these inner layer areas are spaced apart. Because there are gaps in the inner layer areas of the roller sponge, there is greater friction when it comes into contact with the cleaning surface. However, the surface of the roller sponge has less friction because it forms a dense and smooth surface when it comes into contact with the mold during foaming. Therefore, the above-mentioned arrangement can increase the roughness of the roller sponge, which is beneficial for cleaning stubborn debris.

[0096] The roller sponge mold can also be provided with grooves B11 and smooth connections between grooves B11, which can also achieve a cleaning effect. Through experimental comparison, the effect of this embodiment is slightly worse than that of the above embodiment.

[0097] like Figure 10-11c As shown, this invention provides an embodiment of a sponge roller forming method.

[0098] The sponge roller forming method includes,

[0099] Step S10, the roller sponge forming step, uses a special mold to form a roller sponge of uniform thickness on the surface of a sponge roller (roller core), and the surface of the roller sponge is provided with at least one set of wavy arc surface structure.

[0100] Step S11, the sponge roller cutting step, cuts the sponge roller to an appropriate length and chamfers both ends of the sponge roller.

[0101] Specifically, in the roller sponge molding step, the roller core 21 is first placed inside the sponge shaping sleeve 20, and then fixed to the roller core 21 by the left and right fixing covers and the first fixing step 231, and then fixed to the sponge shaping sleeve 20 by the second fixing step 232, so that the roller core 21 and the sponge shaping sleeve 20 are coaxial, and the surface of the roller core 21 and the inner wall of the sponge shaping sleeve 20 are evenly spaced. Then, sponge material, such as PVA material, is injected into the cavity (mold cavity) formed by the roller core 21 and the sponge shaping sleeve 20 for foaming molding, forming a wavy arc surface structure on the surface of the roller sponge.

[0102] During the molding process of the sponge shaping sleeve 20, due to the contact surface between the sponge and the mold cavity of the sponge shaping sleeve 20, a smooth surface layer is formed on the sponge, such as... Figure 11 As shown. Due to the low friction of the smooth surface of the roller sponge, it cannot effectively clean the surface.

[0103] The surface of the roller sponge is provided with at least one set of wavy arc surface structures. This structure can provide wavy arc surface structures on the smooth surface of the roller sponge. When the sponge roller is working, the sidewalls of the grooves between the crests of the wavy arc surface on the roller sponge surface can contact the cleaning surface and generate friction, thereby facilitating efficient cleaning of garbage, especially garbage on sticky surfaces.

[0104] Since the sponge is formed on the surface of the roller core 21, there may be burrs during the process of forming the sponge roller. Therefore, it is necessary to cut the sponge roller formed in step S10 to make the sponge roller have an appropriate length and chamfer its two ends.

[0105] After the sponge roller is demolded, a film with a thickness of 0.2-0.5mm is formed on its surface. This abrasion brings two problems: it increases the contact area with the ground, and under the same unit pressure, the friction increases, exceeding the friction required for normal mopping and cleaning; at the same time, because the sponge surface has a certain thickness and strong tension, it will squeeze the internal sponge layer into a closed space, restricting some of the elasticity of the material itself. When the roller sponge is working, it needs to be squeezed continuously, so the rebound speed and lifespan requirements are high. Abrasion can also release the elasticity and improve the overall performance.

[0106] Before cutting the sponge roller in step S11, the surface of the sponge roller is polished. Polishing is performed on the surface area of ​​the sponge roller, excluding the wavy arc structure, causing partial wear on the surface layer of the sponge roller. This results in a uniform distribution of exposed inner layers on the surface of the sponge roller. Figure 11-11c As shown, this can further reduce the surface friction of the roller sponge while increasing its ability to handle debris, thereby further improving cleaning efficiency.

[0107] The grooves B11 are evenly distributed along the length of the surface of the roller sponge B1, and their number can be set as needed, such as several. Since the two sides of the grooves B11 can be set to be perpendicular or nearly perpendicular, a cleaning scraper B13 can be formed at the contact surface between the surface B12 and the side B11 of the roller sponge B1. Because the roller sponge B1 forms a relatively dense structure with the mold contact surface during molding, the cleaning scraper B13 has a good cutting effect on stubborn debris on the cleaning surface during cleaning. Figure 4 As shown, when the roller sponge B1 rotates in the F direction, the cleaning scraper B13 can form a scraping action with the cleaning surface, which can effectively remove stubborn garbage. Even if it cannot completely remove it, it can cut larger stubborn garbage for cleaning, thereby improving the cleaning effect of stubborn garbage.

[0108] Meanwhile, the cavity inside groove B11 allows liquid to be scraped away from the cleaning surface, making it suitable for scenarios with a large amount of liquid on the cleaning surface. Furthermore, granular solids can be collected through groove B11, preventing situations where granular and powdery debris are mixed, where the presence of granular debris prevents the roller sponge surface from making contact with the cleaning surface or results in a small contact area, thus hindering the removal of granular and powdery debris in one go and improving cleaning efficiency.

[0109] Depending on the needs, the groove B11 can be configured with a trapezoidal cross-section or a sloping structure on one side. This improves the cleaning effect of the scraper B13 and also enhances its ability to handle liquids or particulate solids during the cleaning process. The depth of the groove B11 is 1-2 mm, and its width is greater than 0.5 mm. Furthermore, the distance between two adjacent grooves B11 should be greater than 0.5 mm. Experiments have shown that this configuration provides better cleaning performance, balancing cleaning efficiency and the lifespan of the roller sponge B1. Alternatively, setting the distance between two adjacent grooves B11 to be the same as the width of the groove B11 also achieves good cleaning performance and wear resistance.

[0110] As needed, the area of ​​the groove B11 occupies 1 / 4 to 1 / 2 of the circumferential surface of the roller sponge. The groove is spiral, arc-shaped, or strip-shaped along the length of the roller sponge. The spiral and arc shapes are tested to ensure that only part of the cleaning surface is in contact during cleaning, which can reduce the workload of the motor on the roller without affecting the cleaning effect, resulting in better performance.

[0111] At least one side of the groove B11 is an inclined surface, which forms an angle of less than 90 degrees with the surface of the roller sponge.

[0112] As needed, the surface of the roller sponge has inner layer areas that expose the inner layer of the roller sponge, and these inner layer areas are spaced apart. Because there are gaps in the inner layer areas of the roller sponge, there is greater friction when it comes into contact with the cleaning surface. However, the surface of the roller sponge has less friction because it forms a dense and smooth surface when it comes into contact with the mold during foaming. Therefore, the above-mentioned arrangement can increase the roughness of the roller sponge, which is beneficial for cleaning stubborn debris.

[0113] like Figure 7 As shown, the grooves B11 on the surface of the roller sponge are smoothly connected, which can also achieve a cleaning effect. Through experimental comparison, the effect of this embodiment is slightly worse than that of the above embodiment.

[0114] The sponge roller surface polishing step involves distributing sponge inner layer areas on the sponge roller surface at intervals of 0.2-1.0 mm. The chamfer length is 3-7 mm, and the chamfer angle ranges from 30-70 degrees.

[0115] Because of the grooves, when the raised top is compressed, the grooves leave gaps. When there is a small amount of liquid on the cleaning surface, the liquid can be carried away through the space at the bottom of the grooves, thereby improving the sponge roller's ability to handle liquid.

[0116] The grooved structure effectively handles granular debris, making it adaptable to various types of waste. Furthermore, the roller's contact surface changes from a flat plane to a combination of surfaces and lines. The gaps between these lines allow for more than two simultaneous linear scrubbing motions on the same area, increasing cleaning power. Additionally, the reduced overall contact area decreases friction, enhancing mopping comfort and indirectly reducing energy consumption.

[0117] Within the roller's movement track, the protruding toothed structure rotates continuously, cleaning up any small debris remaining on the track. At the same time, each time it passes the water pressure strip, it indirectly reduces the squeezing intensity, maintaining the dryness after squeezing while reducing the power consumption of squeezing.

[0118] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sponge roller forming mold, characterized in that, Used for molding sponge rollers, it can form grooves distributed along the length of the sponge surface. The sponge roller forming mold includes a sponge shaping sleeve for making the roller sponge and left and right fixing covers for fixing the roller core during forming. The sponge shaping sleeve has a mold cavity with a diameter larger than the roller core. After the left and right fixing covers are fixed to the sponge shaping sleeve and the roller core, a roller sponge forming cavity is formed so that the distance between the roller core surface and the mold cavity is the same. The inner wall of the mold cavity has at least one set of wavy arc surface structures along the radial cross section of the roller. Each set of wavy arc surface structures includes a first wavy arc surface and a second wavy arc surface set between two first wavy arc surfaces. The gap between each adjacent first wavy arc surface and second wavy arc surface is different.

2. The sponge roller forming mold as described in claim 1, characterized in that, The wavy arc surface structure has a wavy arc surface along the length direction of the roller body. Each wavy arc surface is composed of multiple spaced protrusions, and grooves are provided between adjacent protrusions.

3. The sponge roller forming mold as described in claim 2, characterized in that, The inner wall of the mold cavity is provided with three sets of wavy arc surface structures; Alternatively, the first wavy arc surface is formed by two convex strips and three grooves spaced apart; the second wavy arc surface is formed by three convex strips and four grooves spaced apart.

4. The sponge roller forming mold as described in claim 2, characterized in that, The left and right fixed covers include a left fixed cover and a right fixed cover, which are respectively provided with a first fixed step and a second fixed step arranged coaxially. The first fixed step is fixed to the roller shaft and positioned at the axis of the sponge shaping sleeve. The second fixed step is fixed to the sponge shaping sleeve. A sealing ring is provided between the second fixed step and the sponge shaping sleeve.

5. The sponge roller forming mold as described in claim 2, characterized in that, The groove depth is 1-2mm, the groove width is greater than 0.5mm, and the ridge width is greater than 0.5mm; Alternatively, the width of the raised strip is the same as the width of the groove; Alternatively, the area of ​​the wavy arc surface occupies 1 / 4 to 1 / 3 of the circumference of the cylindrical sponge; Alternatively, the wavy arc surface can be arranged in a spiral or arc shape along the length of the cylindrical sponge.

6. A sponge roller manufactured using the sponge roller molding mold as described in any one of claims 2-5, characterized in that, It includes a roller body and a roller sponge installed on the circumferential surface of the roller body. The roller sponge surface has multiple grooves along the circumferential direction and along the length of the roller body. The multiple grooves are evenly distributed along the circumferential direction and along the length of the roller sponge surface. One side of each groove and the roller sponge surface form a cleaning scraper. Preferably, one end of the roller body is provided with a drive motor for driving the sponge roller to rotate, and the other end is provided with a roller shaft core that is axially connected to the drive motor shaft.

7. The sponge roller as described in claim 6, characterized in that, The roller body is made of cylindrical plastic tubes or metal tubes.

8. The sponge roller as described in claim 6, characterized in that, The roller shaft core is equipped with a shaft core cover and a bearing located between the roller shaft core and the roller body, as well as a retaining ring for fixing the bearing and a fixing cover for protecting the bearing and the retaining ring; Preferably, a spring is fitted at one end of the roller shaft to ensure that the roller shaft has a certain amount of axial movement. Preferably, one end of the roller shaft is also provided with a transmission groove, which cooperates with the drive motor shaft to achieve extension and retraction in the length direction and can transmit rotational torque; Preferably, the roller shaft is also provided with a limiting structure to restrict its extension length. The limiting structure can be a limiting ring that is integrated with or separate from the roller shaft.

9. The sponge roller as described in claim 6, characterized in that, When the roller sponge rotates, the cleaning scraper can create a scraping action with the cleaning surface, improving the cleaning effect of stubborn dirt; Alternatively, the groove may have a cavity inside, which can scrape away liquid from the cleaning surface and collect particulate solids through the groove; Alternatively, the groove can be designed with a trapezoidal cross-section. Alternatively, one side of the groove may be a sloping surface. Alternatively, the width between two adjacent grooves is greater than 0.5mm; Alternatively, the distance between two adjacent grooves is the same as the width of the groove; Alternatively, the area of ​​the groove occupies 1 / 4 to 1 / 2 of the circumference of the roller sponge.

10. The sponge roller as described in claim 6, characterized in that, The grooves are spiral, arc-shaped, or strip-shaped along the length of the roller sponge.

11. The sponge roller as described in claim 6, characterized in that, The two sides of the groove are set to be perpendicular or approximately perpendicular; during operation, at least one side of the groove is an inclined surface; Alternatively, during operation, the inclined plane forms an angle of less than 90 degrees with the surface of the roller sponge; Alternatively, the surface of the roller sponge may have inner layer regions that expose the inner layer of the roller sponge, and these inner layer regions are distributed at intervals.

12. A method for forming a sponge roller as described in any one of claims 6-11, characterized in that, include: The sponge roller forming step involves forming a groove structure on the sponge roller using a special mold. The sponge roller cutting process involves cutting the surface of the polished sponge roller and beveling both ends of the sponge roller. Preferably, before the sponge roller cutting step, a roller sponge surface polishing step is also included. When polishing the surface film of the roller sponge, a partially worn area that exposes the inner layer of the sponge roller appears on the surface of the roller sponge, and the worn area is evenly distributed on the surface of the sponge roller. Preferably, the chamfer length is 3-7mm and the chamfer angle ranges from 30-70 degrees; Preferably, the sponge roller surface polishing step involves a spacing of 0.2-1.0 mm between the sponge inner layer areas distributed on the sponge roller surface.

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