Roller sponge and sponge roller assembly manufacturing method

Abstract

The invention discloses a roller sponge and a sponge roller assembly manufacturing method, the roller sponge wraps the circumferential surface of a roller shaft core to form a sponge roller assembly capable of rotatably mopping the floor, and the roller sponge comprises a honeycomb-shaped inner layer and a dense surface layer; the surface layer is attached to the surface of the inner layer, a plurality of exposed inner layer areas are distributed on the surface layer, and the exposed inner layer areas and the surface layer are not in the same plane; a plurality of grooves are distributed in the surface of the roller sponge in the circumferential direction, one side face of each groove and the surface of the roller sponge form a cleaning scraper which is matched with a cleaning face and provided with an acute-angle blade, and the section of each groove is in the shape that at least one side is contracted inwards. The grooves in the surface of the roller sponge can provide certain friction force, balance of the cleaning effect, noise and the service life is considered, meanwhile, the bottoms of the grooves are honeycomb-shaped inner layers, the honeycomb-shaped inner layers have good water absorption performance, and therefore the cleaning effect is good during cleaning.

Description

[0001] This application is a divisional application of Chinese patent application number 202111035100.4 and invention name “A sponge roller and manufacturing method”, the contents of which are incorporated herein by reference. Technical Field

[0002] The invention relates to the technical field of cleaning equipment, and in particular to a roller sponge and a method for manufacturing a sponge roller assembly. Background Art

[0003] The integrated mopping and sweeping cleaning device uses a roller, which is usually a sponge roller made of PVA material. When used, the PVA sponge roller is used as a cleaning component of the integrated mopping and sweeping cleaning device by taking advantage of its high density, high water absorption, low cost, and easy availability. After installation, the roller is squeezed and other operations are performed using a specific mechanical structure to achieve the effect of repeated cleaning and use.

[0004] After molding, the surface of the roller sponge usually forms a dense surface layer due to the contact between the roller sponge and the mold during molding. This causes low water absorption during use, and the dense surface layer is smooth, which also affects the cleaning efficiency. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a roller sponge and a sponge roller assembly manufacturing method, wherein the roller sponge can avoid the low water absorption rate and cleaning efficiency affected by the dense surface layer during the roller sponge molding process.

[0006] In order to solve the above technical problems, in a first aspect, the present invention provides a roller sponge, which is wrapped around the circumferential surface of the roller shaft core to form a rotatable sponge roller assembly for mopping the floor, and the roller sponge comprises:

[0007] The inner layer is honeycomb-shaped;

[0008] The surface layer is dense and attached to the surface of the inner layer. A plurality of exposed inner layer regions are distributed on the surface layer, and the exposed inner layer regions are not in the same plane as the surface layer.

[0009] There are a plurality of grooves distributed along the circumferential direction on the surface of the roller sponge, and one side of each groove forms a cleaning scraper with a sharp-angled edge on the surface of the roller sponge to meet the cleaning surface, and the cross section of the groove is inward-retracted on at least one side.

[0010] In one or some embodiments, looking inward from the outer surface of the roller sponge, the groove penetrates the surface layer to reach the inner layer, the bottom of the groove is the inner layer, the side of the groove close to the root is the inner layer, and the side of the groove close to the surface of the roller sponge is the surface layer.

[0011] In one or some embodiments, a plurality of exposed inner layer regions are distributed on the surface layer of the groove side.

[0012] In one or some embodiments, a plurality of inner layer areas where the sponge is exposed are distributed on the sponge surface on the side of the groove.

[0013] In one or some embodiments, at least one side surface of the groove is an inclined surface, and the inclined surface forms an angle less than 90 degrees with the surface of the roller sponge.

[0014] In one or some embodiments, the grooves are evenly distributed along the circumferential direction on the surface of the roller sponge.

[0015] In one or some embodiments, the depth of the groove is 1-2 mm, and the width of the groove is greater than 0.5 mm.

[0016] In one or some embodiments, the distance between two adjacent grooves is greater than 0.5 mm.

[0017] In one or some embodiments, the distance between two adjacent grooves is the same as the width of the groove.

[0018] In one or some embodiments, the groove has a cross-section in the shape of a ladder.

[0019] In one or some embodiments, two sides of the groove cross section are parallel.

[0020] In one or some embodiments, the groove has a triangular cross-section.

[0021] In one or some embodiments, the grooves are arranged in a spiral shape on the surface of the roller sponge.

[0022] In one or some embodiments, the direction in which the sharp-angled edge of the cleaning scraper scrapes the cleaning surface is consistent with the working rotation direction of the sponge roller.

[0023] In one or some embodiments, the exposed inner layer areas are evenly distributed.

[0024] In one or some embodiments, the groove area occupies 1 / 4-1 / 2 of the circumferential surface of the roller sponge.

[0025] In one or some embodiments, the exposed inner layer area accounts for 1 / 4-1 / 2 of the surface area of ​​the roller sponge.

[0026] In a second aspect, the present invention further provides a method for manufacturing a sponge roller assembly, comprising:

[0027] a sponge roller assembly molding step, placing the roller shaft core into a special mold to mold the roller sponge as described in the first aspect on the circumferential surface of the roller shaft core;

[0028] The step of grinding the surface of the roller sponge of the sponge roller assembly comprises grinding the compact surface layer of the roller sponge at intervals after forming, so that the compact surface layer is partially worn and the inner layer area is exposed;

[0029] The roller sponge cutting step of the sponge roller assembly is to cut the roller sponge with a polished surface and chamfer both ends of the roller sponge.

[0030] In one or some embodiments, the sponge roller assembly molding step includes: first placing the roller shaft core in the sponge molding sleeve, then fixing it to the roller shaft core through left and right fixing covers and a first fixing step, and then fixing it to the sponge molding sleeve through a second fixing step, so that the roller shaft core and the sponge molding sleeve are coaxial, and the surface of the roller shaft core and the inner wall of the sponge molding sleeve are evenly spaced, and then injecting sponge material into the cavity formed by the roller shaft core and the sponge molding sleeve for foaming molding, so as to form a wavy arc surface structure on the surface of the roller sponge.

[0031] In one or some embodiments, after the sponge roller assembly is demoulded, a dense surface layer with a thickness of 0.2-0.5 mm is formed on the surface of the roller sponge.

[0032] In one or some embodiments, in the step of polishing the roller sponge surface of the sponge roller assembly, the spacing between adjacent exposed inner layer regions on the roller sponge surface is 0.2-1.0 mm, and the area of ​​the exposed inner layer regions is 0.002-0.01 square centimeters.

[0033] In one or some embodiments, in the roller sponge cutting step of the sponge roller assembly, the chamfer length is 3-7 mm, and the chamfer angle ranges from 30-70 degrees.

[0034] The present invention provides a roller sponge and a method for manufacturing a sponge roller assembly, wherein the sponge roller assembly comprises a roller shaft core and a roller sponge coated on the circumferential surface of the roller shaft core, the roller sponge is provided with a honeycomb inner layer and a dense surface layer attached to the surface of the honeycomb inner layer, and a plurality of exposed inner layer areas are distributed on the dense surface layer. When in use, since the surface of the roller sponge is provided with grooves, and since a plurality of exposed inner layer areas are distributed on the dense surface layer on the side of the groove, the exposed inner layer area exists, so that the surface of the roller sponge is distributed with fine grooves, which can provide a certain friction force, but will not generate a large friction force, generate a large noise, and take into account the balance between the cleaning effect and the noise and the service life. At the same time, the bottom of the groove is the inner layer, which has good water absorption, so when cleaning, especially when there is a liquid surface, the cleaning effect is good. The intersection of the surface of the roller sponge forms a cleaning knife structure, and the sponge surface of the intersection is relatively dense during the molding process, which has a good cleaning effect on cleaning stubborn garbage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the description only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic structural diagram of a sponge roller embodiment of the present invention.

[0037] Figure 2 It is a schematic diagram of the surface structure of an existing roller sponge.

[0038] Figure 3 It is an enlarged schematic diagram of the surface structure of the roller sponge embodiment of the present invention.

[0039] Figure 4 It is a schematic diagram of the cross-sectional structure of the roller sponge along the vertical direction of the length of the present invention.

[0040] Figure 5 The figure is a schematic structural diagram of another embodiment of the sponge roller of the present invention.

[0041] Figure 6 This is a schematic structural diagram of another embodiment of the sponge roller of the present invention.

[0042] Figure 7 for Figure 6 A schematic diagram of the enlarged structure of part A.

[0043] Figure 8 The present invention is a schematic diagram of the roller sponge forming method embodiment.

[0044] Figure 9a It is a schematic diagram of the structure of the roller sponge after the surface is polished after being formed.

[0045] Figure 9b This is a schematic diagram of the structure of the roller sponge after the surface is polished after molding, which is magnified 20 times.

[0046] Fig.9c This is a schematic diagram of the structure of the roller sponge after the surface is polished after molding, magnified 100 times.

[0047] Figure 9d This is a schematic diagram of the structure of the roller sponge after the surface is polished after molding, magnified 200 times.

[0048] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The claims of the present invention are further described in detail below in conjunction with specific embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments proposed by ordinary technicians in this field before making creative work also fall within the scope of protection of the present invention.

[0050] It should be understood that, in the description of the embodiments of the present invention, all directional indication terms, such as "up", "down", "left", "right", "front", "back", etc., indicate the orientation or position relationship based on the orientation, position relationship shown in the drawings or the orientation or position relationship in which the invented product is usually placed when in use, which is only for the convenience of simplifying the description of the present invention, and does not expressly or imply that the device, element or component referred to must have a specific orientation and a specific orientation structure, and should not be understood as a limitation on the present invention. It is only used to explain the relative position relationship, movement, etc. between the components shown in the drawings. When the specific posture changes, the directional indication may also change accordingly.

[0051] In addition, ordinal numbers such as "first" and "second" in the present invention are only used for the purpose of distinction, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. The features defined as "first" and "second" can explicitly or implicitly indicate at least one of the technical features. In the description of the present invention, "multiple" means at least two, that is, two or more, unless otherwise clearly defined; "at least one" means one or one and more.

[0052] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, the positional relationship between components can be relatively fixed, or the components can be physically fixedly connected; they can be detachably connected or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium or component; they can be internally connected between two elements or interact with each other. Unless otherwise clearly defined in the specification, other interpretations may not achieve the corresponding functions or effects. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The controller and control circuit involved in the present invention are conventional control technologies or units of those skilled in the art. For example, the control circuit of the controller can be realized by ordinary technicians in the field using existing technologies, such as simple programming. If the software or program involved in the control result is not described in detail, it belongs to the use of existing technologies or conventional technologies of ordinary technicians in the field. The power supply also uses the existing technologies in the field, and the main technical point of the present invention is to improve the mechanical device, so the present invention will not describe the specific circuit control relationship and circuit connection in detail.

[0054] The disclosure of the present invention provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described in the present invention. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0055] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0056] like Figure 1 -8, the present invention provides an embodiment of a sponge roller assembly.

[0057] The sponge roller assembly includes a roller core 1 and a roller sponge 2 wrapped around the circumferential surface of the roller core 1. The roller sponge 2 is provided with a honeycomb inner layer 22 and a dense surface layer 20 attached to the surface of the honeycomb inner layer. The dense surface layer 20 is provided with a plurality of areas 201 exposing the inner layer 22. For the convenience of discussion and distinction, the subsequent part of this specification refers to the area 201 as the inner layer area.

[0058] Specifically, the inner layer area 201 where the inner layer 22 is exposed is usually not in the same plane as the dense surface layer 20. The inner layer area 201 where the inner layer is exposed is preferably evenly distributed, so as to ensure that the friction between the roller sponge and the cleaning surface is substantially the same during use, thereby avoiding inconsistent friction during use, causing fluctuations in the operation of the motor, and thus affecting the service life.

[0059] Through experiments, it was found that the area ratio of the inner layer area 201 exposing the inner layer to the surface layer 20 of the roller sponge is 1 / 4-1 / 2, the spacing between adjacent inner layer areas 201 exposing the inner layer on the surface of the roller sponge is 0.2-1.0mm, and the area of ​​the inner layer area 201 exposing the inner layer is 0.002-0.01 square centimeters, which well strikes a balance between cleaning effect, noise and service life.

[0060] When in use, the surface of the roller sponge is provided with grooves 21, and the dense surface layer 20 on the side of the groove is provided with a plurality of inner layer areas 201 that expose the inner layer. The existence of the inner layer areas 201 that expose the inner layer makes the surface of the roller sponge distributed with fine grooves, which can provide a certain friction force, but will not generate a large friction force and generate a large noise, thus taking into account the balance between the cleaning effect and the noise and the service life. At the same time, the bottom of the groove 21 is the inner layer, which has good water absorption, so when cleaning, especially when there is a liquid surface, the cleaning effect is good.

[0061] As required, the groove 21 can be set to be spiral, arc or triangular, and experiments have shown that it has a better cleaning effect.

[0062] In order to improve the cleaning effect, the surface of the roller sponge is evenly distributed with grooves 21 along the circumferential direction. Figure 5 and Figure 6 As shown. A side surface 211 of the groove 21 forms a cleaning scraper 23 with the surface of the roller sponge. At least one side surface 211 of the groove 21 is an inclined surface, and the inclined surface forms an angle less than 90 degrees with the surface of the roller sponge. Through experiments, the cleaning scraper 23 structure formed in this way has better cleaning of stubborn garbage. The cleaning scraper 23 caters to the cleaning surface, that is, the direction of the cleaning scraper 23 is consistent with the working rotation direction F of the sponge roller.

[0063] As required, the cross section of the groove 21 can also be arranged to be ladder-shaped or have two parallel sides.

[0064] Through experiments, it is found that when the area of ​​the groove 21 occupies 1 / 4-1 / 2 of the circumferential surface of the roller sponge, the cleaning effect is the best.

[0065] The grooves 21 are evenly distributed along the length direction of the surface of the roller sponge 2, and the number of grooves 21 can be set as needed, such as a plurality of grooves. Since the two sides of the grooves 21 can be set vertically or approximately vertically, a cleaning scraper 23 can be formed at the contact surface between the surface of the roller sponge 2 and the side 211. Since the roller sponge 2 forms a relatively dense structure with the contact surface of the mold during molding, specifically a dense surface layer 20, during cleaning, the cleaning scraper 23 forms a good cutting effect with the stubborn garbage on the cleaning surface, thereby improving the effect of cleaning stubborn garbage.

[0066] At the same time, since there is a cavity inside the groove 21, the liquid on the cleaning surface can be scraped away, and it can also adapt to the scene where there is more liquid on the cleaning surface. In combination with the dense surface layer 20 of the roller sponge 2, there are multiple inner layer areas 201 exposing the inner layer 22, which have a better cleaning effect when there is more liquid on the cleaning surface. In addition, granular solids can be collected through the groove 21 to avoid the situation where there are mixed places of granular and powdery garbage, because the existence of granular garbage makes the surface of the roller sponge unable to contact with the cleaning surface or the contact area is small, so that the granular and other powdery garbage cannot be cleaned together at one time, thereby improving the cleaning efficiency.

[0067] like Figure 8 - Figure 9d As shown, the present invention also provides an embodiment of a method for manufacturing a sponge roller assembly.

[0068] The sponge roller assembly manufacturing method comprises:

[0069] Step S10 is a roller sponge forming step of the sponge roller assembly, in which a roller sponge is formed on the surface of the roller shaft core by a special mold;

[0070] Step S11 is a step of polishing the surface of the roller sponge of the sponge roller assembly, in which the compact surface layer of the roller sponge is polished at intervals after being formed, so that the compact surface layer 20 is partially worn out, exposing the inner layer area 201 of the inner layer;

[0071] Step S12 is a step of cutting the roller sponge of the sponge roller assembly, cutting the roller sponge with a polished surface, and chamfering both ends of the roller sponge of the sponge roller assembly.

[0072] Specifically, in the roller sponge molding step of the sponge roller assembly, the roller shaft core is first placed in the sponge molding sleeve, and then fixed to the roller shaft core through left and right fixing covers and the first fixing step, and then fixed to the sponge molding sleeve through the second fixing step, so that the roller shaft core and the sponge molding sleeve are coaxial, and the surface of the roller shaft core and the inner wall of the sponge molding sleeve are evenly spaced, and then sponge material, such as PVA material, is injected into the cavity (mold cavity) formed by the roller shaft core and the sponge molding sleeve for foaming molding to form a wavy arc surface structure on the surface of the roller sponge.

[0073] During the forming process of the roller sponge by the sponge shaping sleeve, a smooth and dense surface layer 20 is formed on the surface of the roller sponge due to the contact surface between the roller sponge and the mold cavity of the sponge shaping sleeve. Figure 2 As shown. Since the roller sponge has a smooth and dense surface with low friction, it cannot effectively clean the surface.

[0074] After the roller sponge is demolded, a membrane skin or dense surface layer 20 with a thickness of 0.2-0.5mm is formed on the surface. The membrane skin or dense surface layer 20 is polished at intervals, which we refer to as "skin polishing" in the subsequent part of this specification. This skin polishing solves two problems: increasing the contact area with the ground, and increasing the friction force under the same unit pressure, exceeding the friction force required for normal mopping cleaning; at the same time, since the surface of the roller sponge has a certain thickness and strong tension, the inner layer 22 inside the roller sponge will be squeezed into a closed space, restraining part of the elasticity of the material itself. When the roller sponge is working, it needs to be squeezed continuously, so the rebound speed and life requirements are relatively high. Grinding can also release the elastic force to improve the overall performance.

[0075] Before performing step S12 to cut the roller sponge, step S11 is performed on the surface of the roller sponge, i.e., the step of grinding the surface of the roller sponge of the sponge roller assembly, so that the surface layer 20 of the roller sponge is partially worn, and the surface layer 20 of the roller sponge is formed with inner layer areas 201 uniformly distributed with the inner layer exposed, such as Figures 9a-9d As shown. The friction force on the surface of the roller sponge can be further reduced, while the garbage carrying capacity can be increased, thereby further improving the cleaning efficiency.

[0076] Through experiments, it was found that the area ratio of the inner layer area 201 exposing the inner layer to the surface layer 20 of the roller sponge is 1 / 4-1 / 2, the spacing between adjacent inner layer areas 201 exposing the inner layer on the surface of the roller sponge is 0.2-1.0mm, and the area of ​​the inner layer area 201 exposing the inner layer is 0.002-0.01 square centimeters, which well strikes a balance between cleaning effect, noise and service life.

[0077] The roller sponge surface polishing step of the sponge roller assembly has the inner layer area distributed on the surface of the sponge roller at a spacing of 0.2-1.0 mm. The chamfer length is 3-7 mm, and the chamfer angle ranges from 30-70 degrees.

[0078] In step S10, in the roller sponge forming step of the sponge roller assembly, grooves 21 can be formed on the surface of the roller sponge. The grooves 21 are evenly distributed along the length direction of the roller sponge surface, and the number of grooves 21 can be set as needed, such as a plurality of grooves. Since the two sides of the groove 21 can be set vertically or approximately vertically, a cleaning scraper 23 can be formed at the intersection of the surface of the roller sponge 2 and the side 211. Since the roller sponge 2 forms a relatively dense structure with the contact surface of the mold during molding, the cleaning scraper 23 can form a good cutting effect with the stubborn garbage on the cleaning surface during cleaning. Figure 6 As shown, when the roller sponge 2 rotates in the direction F, the cleaning blade 23 can form a scraping and cutting effect with the cleaning surface, so that stubborn garbage can be cleaned. Even if it cannot be cleaned completely, larger stubborn garbage can be cleaned by cutting, thereby improving the cleaning effect of stubborn garbage. According to needs, the groove 21 can be set to a spiral, arc or triangle shape, and through experiments, it has a better cleaning effect. Further, as Figure 6 As shown, one side surface 211 of the groove 21 and the roller sponge surface 20 form a cleaning scraper 23 with an acute-angled edge that meets the cleaning surface, and the cross-section of the groove 21 is inward-retracted on at least one side.

[0079] like Figures 5 to 7 As shown, since there is a cavity inside the groove 21, the liquid on the cleaning surface can be scraped away, and it can also adapt to the scene where there is more liquid on the cleaning surface. There are multiple inner layer areas 201 exposed from the inner layer 22 distributed on the dense surface layer 20 of the roller sponge 2 to cooperate with the cavity, which has a better cleaning effect when there is more liquid on the cleaning surface. In addition, granular solids can be collected through the groove 21 to avoid the following situation, that is, when there are mixed places of granular and powdery garbage, the surface of the roller sponge cannot contact the cleaning surface or the contact surface is small due to the presence of granular garbage, so that the granular and other powdery garbage cannot be cleaned together at one time. Therefore, setting the groove 21 on the surface of the roller sponge 2 can improve the cleaning efficiency.

[0080] According to the needs, the groove 21 can be set to a structure with a ladder-shaped cross section or a side with an inclined surface, which can improve the cleaning effect of the cleaning scraper 23 and also have a better ability to carry liquid or granular solids during the cleaning process. The depth of the groove 21 is 1-2mm, and the width of the groove 23 is greater than 0.5mm. Moreover, the width between the two adjacent grooves 21 is greater than 0.5mm. Through experiments, such a setting has a better cleaning effect, taking into account the cleaning efficiency and the service life of the roller sponge 2. And the distance between the two adjacent grooves 21 is the same as the width of the groove 31, which also has a better cleaning effect and wear resistance.

[0081] According to the needs, the area of ​​the groove 21 occupies 1 / 4-1 / 2 of the circumferential surface of the drum sponge. The groove is spiral, arc or strip along the length direction of the drum sponge, wherein the spiral and arc are tested by the test spiral and arc, so that when cleaning, only partial contact is made on the cleaning contact surface, which can reduce the working load of the motor on the drum, and at the same time does not affect the cleaning effect, and has a better effect.

[0082] At least one side surface of the groove 21 is an inclined surface, and the inclined surface forms an angle less than 90 degrees with the surface of the roller sponge.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roller sponge, wrapped around the circumferential surface of a roller shaft core to form a rotatable sponge roller assembly for mopping the floor, characterized in that: include: The inner layer is honeycomb-shaped; The surface layer is dense and attached to the surface of the inner layer. A plurality of exposed inner layer regions are distributed on the surface layer, and the exposed inner layer regions are not in the same plane as the surface layer. There are a plurality of grooves distributed along the circumferential direction on the surface of the roller sponge, and one side of each groove forms a cleaning scraper with a sharp-angled edge on the surface of the roller sponge to meet the cleaning surface, and the cross section of the groove is inward-retracted on at least one side.

2. The roller sponge according to claim 1, characterized in that: Looking inward from the outer surface of the roller sponge, the groove penetrates the surface layer to reach the inner layer, the bottom of the groove is the inner layer, the side of the groove close to the root is the inner layer, and the side of the groove close to the surface of the roller sponge is the surface layer.

3. The roller sponge according to claim 1, characterized in that: A plurality of exposed inner layer regions are distributed on the surface layer of the groove side.

4. The roller sponge according to claim 1, characterized in that: At least one side surface of the groove is an inclined surface, and the inclined surface forms an angle less than 90 degrees with the surface of the roller sponge.

5. The roller sponge according to claim 1, characterized in that: The grooves are evenly distributed on the surface of the roller sponge along the circumferential direction.

6. The roller sponge according to claim 1, characterized in that: The depth of the groove is 1-2 mm, and the width of the groove is greater than 0.5 mm.

7. The roller sponge according to claim 6, characterized in that: The distance between two adjacent grooves is greater than 0.5 mm.

8. The roller sponge according to claim 1, characterized in that: The distance between two adjacent grooves is the same as the width of the groove.

9. The roller sponge according to claim 1, characterized in that: The cross section of the groove is in a ladder shape.

10. The roller sponge according to claim 1, characterized in that: The two side edges of the groove cross section are parallel.

11. The roller sponge according to claim 1, characterized in that: The cross section of the groove is triangular.

12. The roller sponge according to claim 1, characterized in that: The grooves are arranged in a spiral shape on the surface of the roller sponge.

13. The roller sponge according to any one of claims 1 to 12, characterized in that: The direction in which the sharp-angled edge of the cleaning scraper scrapes the cleaning surface is consistent with the working rotation direction of the sponge roller.

14. The roller sponge according to any one of claims 1 to 12, characterized in that: The exposed inner layer areas are evenly distributed.

15. The roller sponge according to any one of claims 1 to 12, characterized in that: The area of ​​the groove occupies 1 / 4-1 / 2 of the circumferential surface of the roller sponge.

16. The roller sponge according to any one of claims 1 to 12, characterized in that: The exposed inner layer area accounts for 1 / 4-1 / 2 of the surface area of ​​the roller sponge.

17. A method for manufacturing a sponge roller assembly, characterized in that: include: A sponge roller assembly molding step, placing the roller shaft core into a special mold to mold the roller sponge as claimed in any one of claims 1 to 16 on the circumferential surface of the roller shaft core; The step of grinding the surface of the roller sponge of the sponge roller assembly comprises grinding the compact surface layer of the roller sponge at intervals after forming, so that the compact surface layer is partially worn and the inner layer area is exposed; The roller sponge cutting step of the sponge roller assembly is to cut the roller sponge with a polished surface and chamfer both ends of the roller sponge.

18. The method for manufacturing a sponge roller assembly according to claim 17, wherein: The sponge roller assembly molding steps include: first placing the roller shaft core in the sponge shaping sleeve, then fixing the roller shaft core through left and right fixing covers and a first fixing step, and then fixing the roller shaft core through a second fixing step to the sponge shaping sleeve, so that the roller shaft core and the sponge shaping sleeve are coaxial, and the surface of the roller shaft core and the inner wall of the sponge shaping sleeve are evenly spaced, and then injecting sponge material into the cavity formed by the roller shaft core and the sponge shaping sleeve for foaming molding, so as to form a wavy arc surface structure on the surface of the roller sponge.

19. The method for manufacturing a sponge roller assembly according to claim 17, wherein: After the sponge roller assembly is removed from the mold, a dense surface layer with a thickness of 0.2-0.5 mm is formed on the surface of the roller sponge.

20. The method for manufacturing a sponge roller assembly according to claim 17, wherein: In the step of polishing the roller sponge surface of the sponge roller assembly, the spacing between adjacent exposed inner layer areas on the roller sponge surface is 0.2-1.0 mm, and the area of ​​the exposed inner layer areas is 0.002-0.01 square centimeters.

21. The method for manufacturing a sponge roller assembly according to claim 17, wherein: In the roller sponge cutting step of the sponge roller assembly, the chamfer length is 3-7 mm, and the chamfer angle ranges from 30-70 degrees.

Images