Paste pre-spreading auxiliary tool, composite spreading tool and use method

Abstract

The invention provides a paste pre-spreading auxiliary tool, a composite spreading tool and a using method, the pre-spreading auxiliary tool comprises a working part, a handheld part and a connecting part, the working surface of the pre-spreading auxiliary tool is a convex curved surface, the two main curvatures of the curved surface are positive numbers, and when the curved surface acts on paste in a rolling and / or rolling mode, the two main curvatures of the curved surface are different. Compared with a spreading tool made of the same material, such as a cylindrical roller or a scraper, the non-stick performance is higher. The pre-spreading auxiliary tool is mainly used for preliminarily spreading the paste, the rolled paste is locally leveled and compacted, and then the final rolling can be easily completed by using a cylindrical roller in a matched manner. According to the tool, the cost of surface non-stick treatment is saved, the durability and stability of the working face are improved, meanwhile, the potential environmental influence such as a coating layer is avoided, and the tool is a novel tool which is ingenious in originality, low in cost, high in efficiency, stable, durable and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of paste application, and in particular to a paste pre-spreading auxiliary tool, a composite spreading tool and a use method. Background Art

[0002] Paste is a form of matter with specific physical and chemical properties, which is between solid and liquid. Pastes usually show a certain viscosity and plasticity, can maintain their shape but can flow or deform when external force is applied, and can also have thixotropy. Pastes are widely used in many industries, such as thermal conductive pastes and conductive pastes in electronic product manufacturing, greases and sealing pastes in industrial manufacturing, caulking pastes and putty powders in the construction industry, body repair pastes in the automotive industry, topical ointments and gel-type drugs in the pharmaceutical industry, and various pastes in the food, skin care products and other industries.

[0003] The choice of paste application tools depends on the properties of the paste (such as viscosity, adhesion, fluidity, etc.), the requirements of the application (such as accuracy, speed, uniformity, flatness, thickness, etc.), the characteristics of the spreading tool itself, and the user's preference. Commonly used application tools include: ① Brushes, sponges, etc. are suitable for applying grease, sealing paste, paint, etc. The advantage is that they can cover evenly, but the disadvantage is that they require the paste to have a low viscosity; ② Scrapers and spatulas are suitable for applying thermal paste, putty, caulking paste, sauces, etc. The advantages are that they have a certain smooth surface and control thickness, but the disadvantages are low accuracy and the viscosity of the paste cannot be too large; ③Other improved application tools that can be used for pastes.

[0004] For example, Patent Document 1 discloses a pre-spreading tool particularly used for thermal paste, which has a cylindrical smooth outer surface working surface, which is an improved development of further bending deformation based on the bending deformation formed by the pressure of the blade of the scraper, thereby forming a cylindrical smooth outer surface working surface, and a low disturbance basis can be obtained by repeated rolling of the working surface, and a highly repeatable rolling friction method can be obtained to pre-spread the thermal paste, and based on the low disturbance basis, the thixotropy of the thermal paste is fully utilized to adjust the dispersed phase structure inside, on the top and bottom surfaces of the thermal paste, so that the thermal paste can achieve high continuity, high stability and high robustness adjustment of the dispersed phase structure under the influence of its own thixotropy, so that the spread layer obtained under the previous rolling will form a rolled layer with better properties after the next rolling. This rolling method can improve the efficiency, quality and robustness of thermal paste paving. Patent Document 1 cited herein is cited as a reference in its entirety to the present disclosure.

[0005] Patent document 2 discloses a roller tool that can be operated by fingers and a method of using the roller tool, which includes a roller body, a connecting part and a finger pinching part. By constructing two relatively independent finger pinching parts, the driving mode of the roller body is improved to two fingers pinching one finger pinching part on each side of the roller body to push and roll the roller body. It is used to apply and / or roll substances such as pastes, and is particularly suitable for scenes with small working range and force, and has the advantages of dexterity, improved efficiency, material saving, cost reduction, space saving, high robustness, etc. The working principle of this improvement applied to the spreading of thermal paste is as follows: at the macro level, the scraper obtains sliding friction and shear slip force by "sticking and pulling". Excessive shear slip force will bring negative problems, such as scraping and peeling. At the same time, the sliding friction depends on the contact area and friction coefficient, and the thermal paste with high viscosity is easy to adhere to more substances when it is detached; at the micro level, the shear stress can only make the solid particles in the dispersed phase spread horizontally, but cannot achieve the effect of making it denser; relatively speaking, the roller obtains rolling friction and vertical pressure by "repeated rolling". Because of its small friction and large pressure and high-frequency repetitive operation, it reduces the negative effect of shear force while increasing the compacting effect of pressure. The Poisson effect (lateral deformation effect) in plastic mechanics can be used to explain the effect of vertical pressure on horizontal spreading and thinning. Patent document 2 cited in this article is cited as a reference in its entirety to the present disclosure.

[0006] In addition, thermal conductive paste, such as the above-mentioned one, is a common substance in paste, and its main components are matrix material (carrier), filler and additives. The matrix material is the basis of thermal conductive paste, provides the basic physical properties of the paste, and serves as a carrier for fillers and other additives. Silicone oil is one of the most commonly used matrix materials, and there are non-silicon organic solvents such as mineral oil or synthetic ester oil. Fillers mainly determine the thermal conductivity of thermal conductive paste. Common fillers include metal oxides (such as aluminum oxide, zinc oxide), metal powders (such as silver powder, copper powder), ceramic materials (such as boron nitride), carbon-based fillers (such as graphene, carbon nanotubes, diamond powder), etc. Additives are to improve specific properties, such as moisture resistance, oxidation resistance or corrosion resistance and processing performance, and a small amount of special chemicals may be added. The main function of thermal conductive paste is to fill the tiny gaps and uneven surfaces between the heating element and the heat sink. If there is air in these gaps, the heat conduction efficiency will be greatly reduced. At the same time, it is necessary to ensure the uniformity, flatness and thickness of the spreading layer. The thickness is generally recommended to be 0.05mm to 0.1mm.

[0007] Viscosity refers to the amount of internal friction when a fluid (including liquids and some semi-solids) flows. In simple terms, it is the ability of the fluid to resist deformation. For thermal paste, viscosity affects how it is applied, how evenly it is applied, and whether it is prone to overflow or flow. The right viscosity can make the thermal paste easier to handle and maintain a certain shape and position after application. Viscosity can be divided into the following three categories: High viscosity: This type of thermal paste is thicker and less likely to flow. They are suitable for applications that need to maintain a fixed shape and prevent overflow or flow from the application location. They generally have good long-term stability, but may be difficult to apply evenly; Medium viscosity: This is the most common type of thermal paste. It is neither too thin nor too thick, easy to apply while providing a certain structural stability. This type of thermal paste is suitable for most standard CPU or GPU cooling installations; Low viscosity: Low viscosity thermal pastes have better fluidity and can more easily fill surface unevenness and ensure good contact. However, they may need to be used more carefully to prevent excessive diffusion or overflow during assembly.

[0008] Adhesion refers to the ability of one material to bond tightly to the surface of another material. For thermal paste, good adhesion means that it can firmly adhere to the surface of the workpiece and remain stable even under temperature changes or vibrations. This helps ensure effective heat conduction performance for a long time and prevents air or other low thermal conductivity substances from entering the interface, thereby reducing thermal resistance.

[0009] Citation list Patent document 1: Chinese patent application publication CN119056705A Patent document 2: Chinese patent application publication CN119140384A Summary of the invention

[0010] Problems to be solved by the present invention However, thermal pastes with higher thermal conductivity usually also have high viscosity and high adhesion. However, thermal pastes with high viscosity may also be difficult to spread and difficult to fully fill the tiny gaps between the two workpiece surfaces. At the same time, thermal pastes with high adhesion may adhere to the surface of the spreading tool, making it difficult to spread evenly.

[0011] The cylindrical smooth outer surface of the working surface described in Patent Document 1 and the roller body described in Patent Document 2 have greatly improved the efficiency and quality of the thermal paste with high viscosity in the spreading field, but the above patent documents also describe the adverse effects of the adhesion of the thermal paste in the spreading. The preferred solution is to treat the roller surface with non-stick properties through physical or chemical treatment, including grinding, polishing, coating, plating or surface modification. However, this depends on the production process and material quality to a certain extent, and strong non-stick materials or treatment methods will inevitably bring about a significant increase in difficulty and cost.

[0012] For example, the adhesion problem in the spreading of thermal conductive paste has the same guiding significance for the spreading of paste in other industries. It is an urgent technical problem to continue to study materials or treatment methods with strong non-stick properties and reduce their costs. In addition, it is also crucial to explore new non-stick theories and structures.

[0013] The present disclosure is in view of the above-mentioned problems, and the purpose of the present disclosure is to provide a pre-spreading auxiliary tool, a composite spreading tool and a use method for pastes with strong non-stickiness, so as to reduce the difficulty and cost of obtaining strong non-stickiness with existing application tools for pastes.

[0014] Solution to the problem The present disclosure is made to solve the above problems, and a first aspect thereof provides a pre-spreading auxiliary tool for a paste, characterized in that the pre-spreading auxiliary tool comprises: A working portion, the outer surface of which has a working surface, the working surface is configured as a convex curved surface, and the characteristics of the curved surface are defined in mathematical terms as follows: two main curvatures are positive numbers; a hand-held part for manually controlling the pre-spreading auxiliary tool so that the working surface presses and / or rolls the paste; A connecting part is used to connect the working part and the hand-held part, and the connection method includes a fixed connection or a movable connection.

[0015] Optionally, the working portion includes: the outer surface having a complete closed curved surface; or, the outer surface having an open closed curved surface; or, the outer surface having a non-closed curved surface.

[0016] Optionally, the working surface is the whole or part of any one of a sphere, an ellipsoid or a torus; wherein the whole or part includes: a structure without through holes or blind holes; or a structure with through holes or blind holes; or a structure as a non-closed curved surface.

[0017] Optionally, the pre-spreading auxiliary tool includes: The whole or part of the structure is not provided with through holes or blind holes, and the hand-held part is configured to utilize any part of the outer surface except the working surface; Or, the whole or part of the structure is not provided with through holes or blind holes, and the connection method is a ball-and-socket connection; Or, the whole or part of the structure is provided with a through hole or a blind hole, the through hole or the blind hole is used to engage the connecting part, and the connecting part extends outward and is connected to a hand-held part; Or, the whole or part of the structure is a non-closed curved surface, and the hand-held part is connected to the part of the working part other than the working surface in a fixed connection or a movable connection; Alternatively, the whole or part of the structure is a non-closed curved surface, and the non-closed curved surface is configured to have an opening that can be used for finger insertion.

[0018] Optionally, the pre-spreading auxiliary tool includes: the working surface is subjected to non-stick treatment, and the non-stick treatment is grinding, polishing, spraying lubricant, plating, coating or surface modification; or, the paste is a thermal conductive paste.

[0019] Optionally, the handheld part is replaced by an automated mechanical drive part.

[0020] A second aspect of the present disclosure provides a composite spreading tool for a paste, characterized in that it comprises: the pre-spreading auxiliary tool as described in the first aspect above, and a hand-held roller having a zero Gaussian curvature working surface; the pre-spreading auxiliary tool and the hand-held roller are coupled to form the composite spreading tool, and the coupling method includes: Use fixed coupling, including welding, bonding, riveting, bolting, mortise and tenon connection or one-piece molding process; or, use movable coupling, including hinges, ball joints, sliding joints, universal joints, binders, bearings, telescopic connections or flexible connections; or, use detachable coupling, including snap connections, plug-in connections, quick-release joints, buckle connections or magnetic connections; or, use a combination of independent uses.

[0021] Optionally, the composite spreading tool comprises: The coupling method includes the fixed coupling, the movable coupling or the detachable coupling; and the working part of the pre-spreading auxiliary tool is connected to the left side of a roller body or the top end of a hand-held part or the top side of a hand-held part or the upper side of a connecting part included in the hand-held roller in the coupling method, or the hand-held part of the pre-spreading auxiliary tool is connected to a hand-held part included in the hand-held roller in the coupling method.

[0022] Optionally, the handheld roller is replaced by a scraper.

[0023] The third aspect of the present disclosure provides a method of use, characterized in that the method of use comprises: The pre-spreading auxiliary tool for the paste as described in the first aspect above, the method of use further comprises: holding, pressing, pinching or inserting fingers into the handheld portion of the pre-spreading auxiliary tool, and controlling the working portion of the pre-spreading auxiliary tool to act on the paste in a compressing and / or rolling manner, so as to achieve the purpose of preliminarily attaching and / or spreading the paste on a target surface; or, The composite spreading tool applied to the paste as described in the second aspect above, the method of use also includes: in the first stage, holding the hand, pressing with the palm, pinching with the fingers or inserting the fingers into the hand-held part of the pre-spreading auxiliary tool in the composite spreading tool, controlling the working part of the pre-spreading auxiliary tool to act on the paste in a pressing and / or rolling manner, so as to achieve the purpose of preliminarily attaching and / or spreading the paste on a target surface; in the second stage, holding or pinching the hand-held part of the hand-held roller in the composite spreading tool, controlling the movement of the roller body and acting on the paste, forming repeated rolling, so as to achieve the purpose of finally spreading the paste. Beneficial Effects

[0024] The present disclosure creatively proposes a relatively non-stick geometric structure suitable for spreading the paste by constructing a curved surface with a limited curvature feature as a working surface. When the geometric structure acts on the paste in a pressing and / or rolling manner, it exhibits stronger non-stick properties than spreading tools of the same material, such as cylindrical rollers or scrapers. This structure is mainly used for the initial spreading of the paste. After rolling, the paste is locally flattened and compacted, and then the cylindrical roller is used to easily complete the final rolling.

[0025] Since the non-stick property does not come from the surface coating, plating or modification of the material, but only the modification of the geometric structure, the processing cost that would have been invested in the roller surface is saved; at the same time, as an auxiliary structure, the coating or plating itself also has certain defects, such as durability issues. The non-stick coating or plating may wear over time and use, which may cause the coating to peel off or be damaged, affecting its non-stick performance; for example, chemical stability, some types of non-stick coatings or platings may react when exposed to strong acids, strong bases or specific chemicals, thereby weakening their effectiveness or causing other problems; there are also environmental impact issues. The manufacture and disposal of non-stick coating products may have a negative impact on the environment. Some coating materials are not easy to degrade, and harmful by-products may be produced during the production process. In addition, in terms of production, existing industrial manufacturing methods can fully produce the curved surfaces or structures required by the present disclosure with high efficiency, high quality and low cost.

[0026] In summary, the present invention demonstrates novelty, creativity and practicality in many aspects such as mechanism, effect, production, use and environmental impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1-1 , Figure 1-2 It is a technical principle diagram of an embodiment of the present disclosure; Figure 2-1 , Figure 2-2 , Figure 2-3 It is a structural diagram of the first embodiment of the present disclosure; Figure 3-1 , Figure 3-2 , Figure 3-3 This is a schematic diagram of the structure of the second embodiment of the present disclosure; Figure 4-1 , Figure 4-2 , Figure 4-3 , Figure 4-4 This is a schematic diagram of the structure of the third embodiment of the present disclosure.

[0028] Description of the symbols in the accompanying drawings: 10-paste; 11-spherical surface; 12-viscosity peak; 13-cylindrical surface; 14-wave peak; 15-contact point; 16-contact line; 20-working surface; 21-spherical working part; 22-blind hole; 23-connecting part; 24-forked rod; 25-hand-held part; 26-finger pinching part; 27-ball head; 28-socket; 30-spherical tool; 31-partial spherical tool; 32-through hole; 33-hemispherical tool; 40-roller body; 41-curved rod. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and beneficial effects of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments. In the absence of conflict, the various aspects, embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0030] The technical principles of this disclosure are as follows: As you can understand, curvature is a core concept in differential geometry, used to describe the degree of curvature of a curve or surface at a certain point. It provides a quantitative way to measure the degree to which an object deviates from a straight line or plane. Curvature can be applied to one-dimensional curves and surfaces of two dimensions and above, and there are different types to describe the curvature characteristics in different dimensions.

[0031] For two-dimensional surfaces, we need to consider the bending characteristics in multiple directions. The following are several important types of curvature: a. Principal Curvatures At each point on the surface, there are two mutually perpendicular directions, in which the curvature reaches its extreme value, which are called the maximum principal curvature k1 and the minimum principal curvature k2 respectively. The curvature can be negative, zero or positive; Positive curvature means that the shape around the point resembles a portion of a sphere or ellipsoid, i.e. the curvature in all directions curves inward; Zero curvature describes a state of space that is neither curved inward nor outward, meaning that the surface is flat, i.e. its shape resembles a plane or a portion of a cylinder; Negative curvature means that the shape around the point is similar to a saddle, in other words, it curves inward in one direction and outward in another direction perpendicular to it, such as a hyperbolic paraboloid (saddle surface); b. Gaussian Curvature Gaussian curvature K is the product of two principal curvatures: K = k1 * k2; Gaussian curvature provides information about the intrinsic geometry of the surface. For example, spheres and ellipsoids have positive Gaussian curvature, while planes and cylinders have zero Gaussian curvature.

[0032] The two principal curvatures of the working surface described in the claims of the present disclosure are both positive numbers, which means that the curvatures in all directions on the working surface are inwardly curved, that is, they have convex surface features, and the Gaussian curvature is also a positive number; it can be seen from the basic principle that the curved surface described in the present disclosure intersects with its tangent plane at a point, and the cylindrical surface with zero Gaussian curvature intersects with its tangent plane at a straight line, and specifically, the plane intersects with its tangent plane at a surface; this means that when the working surface compresses and / or rolls the paste on a plane, it has a smaller contact area and smaller adhesion than a cylindrical surface or a plane; further, when the working surface is a spherical surface, the difference in adhesion between it and a cylindrical surface tool during the rolling paste movement is compared, such as Figure 1-1 and Figure 1-2 It can be seen that: The spherical surface 11 tool has very little paste 10 adhered to it in the direction of movement, mainly because the two main curvatures of the spherical surface 11 are positive numbers, and the curved surface is bent inward, resulting in only one contact point 15 between it and the plane of the paste 10; and the tiny viscosity peak 12 still exists because the paste 10 has plasticity, and the bottom contact point 15 of the spherical surface 11 is partially sunken into the tangent plane of the paste 10. At this time, the paste 10 that is not carried up in the adjacent units around the viscosity peak 12 (in the left, right and rear directions) exerts a downward dragging force on the paste 10 on the viscosity peak 12, which greatly reduces the spherical surface 11 when rolling. The cylindrical surface 13 tool has more paste 10 (such as wave crest 14) attached to it in the direction of movement. This is because, although the cylindrical surface 13 also has a positive principal curvature, the other principal curvature is zero, which means that the intersection of the paste 10 and the cylindrical surface 13 in the direction of zero curvature is a contact line 16. Considering that the contact area is enlarged due to plastic subsidence, the paste 10 of the adjacent units on this contact line 16 (in both left and right directions) is also carried up, and only the paste 10 of the adjacent units in the rear has a downward drag force on the paste 10 on the wave crest 14. Based on the above model, it can be inferred that for the paste spreading tool of the same material, the non-stickiness of the spherical structure is about one-third of that of the cylindrical structure.

[0033] In addition, in the case where the paste is a thermal conductive paste, when the user guides the thermal conductive paste from the container to the chip before it is initially spread, the thermal conductive paste is usually in a spherical, columnar, strip-like or convex peak shape, and has a small contact area with the chip surface and is not tightly fitted. At this time, it is easier to adhere to the tool surface rather than the chip surface when directly spread with a roller or a scraper, and then it is easier to be carried by the roller or scraper, but the initial spreading effect using the working surface provided by the present disclosure is very good. Once the initial spreading work is completed, the contact area between the thermal conductive paste and the chip increases and the fit is tighter. The subsequent rolling with a roller has relative non-stick properties. This composite use method utilizes the structural non-stick advantage of the working surface provided by the present disclosure, and relies less on the non-stick coating or surface treatment of the material itself, and then cooperates with the high-efficiency rolling of the zero Gaussian curvature roller tool, thereby achieving the effect of reducing costs and increasing efficiency, and getting twice the result with half the effort.

[0034] It should be noted that the working surface of the pre-spreading auxiliary tool described in the present disclosure is constructed as a convex curved surface, the characteristics of which are defined in mathematical terms as two main curvatures that are both positive numbers, the convex curved surface is a macroscopic structure, and the main curvature is the curvature of the overall curved surface. In addition, it should be pointed out that when the working surface surface contains local micro-pits or polyhedral structures, the convex curved surface described in the present disclosure refers to a circumscribed curved surface tangent to the outer vertices of the above-mentioned irregular structure. Embodiment 1

[0035] The first embodiment of the present disclosure provides a pre-spreading auxiliary tool, including a working part, a hand-held part and a connecting part, such as Figure 2-1 to Figure 2-3 As shown: Figure 2-1 The surface of the spherical working part 21 of the pre-spreading auxiliary tool is provided with two symmetrical blind holes 22, and the connecting part is a forked rod 24, the two forked ends of which are respectively embedded in the blind holes 22 to form a movable connecting part 23, and the other end is constructed as a long handle hand-held part 25; Figure 2-2 The pre-spreading helper in Figure 2-1 The connecting portion 23 and the hand-holding portion 25 are changed into two finger-pinching portions 26, and the corresponding use method is also changed from hand-holding to finger-pinching, so as to form compression and / or rolling on the paste 10; Figure 2-3 A complete spherical working part 21 is constructed as a ball head 27 and a socket 28 matching the ball head. One end of the socket 28 is coupled to the ball head 27, and the other end is constructed as a hand-held part 25.

[0036] In some embodiments of the present disclosure, the outer surface of the working portion also has one or more combinations of a complete closed curved surface, an open closed curved surface or a non-closed curved surface. Optionally, the working surface 20 of the outer surface is the whole or part of any one of a sphere, an ellipsoid, a torus or a spindle surface. Optionally, the whole or part is constructed without a through hole 32 or a blind hole 22. Optionally, the whole or part is constructed with a through hole 32 or a blind hole 22, one end of the connecting portion 23 is engaged with the through hole 32 or the blind hole 22, and the other end is coupled to the handheld portion 25. Optionally, the whole or part is constructed as a non-closed curved surface.

[0037] In other embodiments of the present disclosure, the connection portion 23 is fixedly connected. Fixed connection includes but is not limited to welding, bonding, riveting, bolting, mortise and tenon connection or one-piece molding process. Optionally, the connection portion 23 is movable, including a hinge, a ball joint, a sliding joint, a universal joint, a binder, a bearing, a telescopic connection or a flexible connection. Optionally, the connection portion 23 is detachably coupled, including a snap connection, a plug-in connection, a quick-release joint, a buckle connection or a magnetic connection.

[0038] In some other embodiments of the present disclosure, the pre-spreading auxiliary tool can be selected from one or more combinations of rubber, plastic, metal, ceramic, glass, wood, fur or composite materials. Optionally, rubber and plastic are injection molded, blow molded, thermoformed or extruded; optionally, rubber is vulcanized; optionally, ceramics are dry pressed, grouting or sintered; optionally, glass is blown, pressed or float molded; optionally, composite materials are hand-laid, vacuum bagged or resin transfer molding (RTM); optionally, metals are machined, die-casted, welded and fused, electric discharge machining (EDM) and wire cutting (WEDM) or laser processed; optionally, new technologies such as 3D printing, digital light processing (DLP) and stereolithography (SLA) or selective laser sintering (SLS) are used.

[0039] In some other embodiments of the present disclosure, the surface of the working surface 20 is subjected to non-stick treatment, including grinding, polishing, spraying lubricant, plating, coating or surface modification, etc. Optionally, common non-stick treatment processes include fluoropolymer coating (Teflon), silicone coating, ceramic coating, physical vapor deposition (PVD), chemical vapor deposition (CVD), self-assembled monolayer (SAMs), nano coating, super hydrophobic / super hydrophilic surface, chemical etching, laser texturing, plasma treatment or photo-induced cross-linking, etc.

[0040] In some further embodiments of the present disclosure, the pre-spreading auxiliary tool comprises: the working surface is subjected to non-stick treatment, and the non-stick treatment is grinding, polishing, spraying lubricant, plating, coating or surface modification; or the paste is thermal conductive paste. In addition, the handheld part is replaced by an automated mechanical drive part. Embodiment 2

[0041] The second embodiment of the present disclosure also provides a simple pre-spreading auxiliary tool, including a working part, a hand-held part and a connecting part, such as Figures 3-1 to 3-3 As shown: Figure 3-1 In the middle is the sphere tool 30, Figure 3-2 The part of the spherical tool 31 with a through hole 32 is provided in the middle. Figure 3-3 The tool 33 is a non-enclosed hemispherical tool; the hand-held portion 25 is constructed to utilize any portion of the outer surface of the sphere 21 except the working surface 20, and the connecting portion 23 is constructed to utilize the outer surface of the sphere 21 and connect the working surface 20 and the hand-held portion 25; its common control method includes finger pinching, palm pressing or finger insertion, so as to form compression and / or rolling on the paste 10.

[0042] In some embodiments of the present disclosure, the outer surface of the working portion also has one or more combinations of a complete closed curved surface, an open-hole closed curved surface or a non-closed curved surface. Optionally, the working surface 20 of the outer surface is the whole or part of any one of a sphere, an ellipsoid, a torus or a spindle surface. Optionally, the whole or part is constructed without a through hole 32 or a blind hole 22, and the hand-held part 25 is constructed to utilize any part of the outer surface except the working surface 20. Optionally, the above-mentioned whole or part is constructed with a through hole 32 or a blind hole 22. Optionally, the whole or part is constructed as a non-closed curved surface. Optionally, the non-closed curved surface is constructed with an opening that can be used for finger insertion, and the method of use is to control the working surface 20 to form compression and / or rolling on the paste 10 after the finger is inserted into the opening.

[0043] It should be noted that the material, process, and non-stick treatment of the pre-spreading auxiliary tool in the second embodiment may be the same as those of the pre-spreading auxiliary tool in the first embodiment. Embodiment 3

[0044] The third embodiment of the present disclosure provides a composite spreading tool, including a pre-spreading auxiliary tool, a handheld roller with a zero Gaussian curvature working surface, and a coupling method of the two, such as Figure 4-1 to Figure 4-3 As shown: Figure 4-1 The handheld roller has a cylindrical roller body 40, the pre-spreading auxiliary tool includes a spherical working part 21, the connecting part 23 is movably connected, and the coupling part is the end of each handheld part, which is equivalent to a shared handheld part 25 in the opposite direction; Figure 4-2 The coupling position of the middle handheld roller and the pre-spreading auxiliary tool is the top of the handheld portion 25, which is equivalent to the forward shared handheld portion 25; Figure 4-3 The pre-spreading auxiliary tool is constructed with a spherical working part 21 as a ball head 27, and a hollow hemispherical groove hole is constructed on the side of the cylindrical roller body 40 of the hand-held roller as a socket 28, and the two are coupled in a ball-and-socket connection. A blind hole 22 and a curved rod 41 are constructed on the other side of the cylindrical roller body 40 of the hand-held roller, and one end of the curved rod 41 is embedded in the blind hole 22 as a connecting part 23, and the other end is constructed as a long-handled hand-held part 25; Figure 4-4 The composite spreading tool in Figure 4-1 An example in which the movable connection part 23 is replaced by a ball and socket connection.

[0045] In some embodiments of the present disclosure, the pre-spreading auxiliary tool and the handheld roller are coupled by fixed coupling. Fixed coupling includes but is not limited to welding, bonding, riveting, bolting, mortise and tenon connection or one-piece molding process. Optionally, a movable coupling is adopted, including a hinge, a ball joint, a sliding joint, a universal joint, a binder, a bearing, a telescopic connection or a flexible connection. Optionally, a detachable coupling is adopted, including a snap connection, a plug-in connection, a quick-release joint, a buckle connection or a magnetic connection. Optionally, a combination of each being used independently is adopted.

[0046] In other embodiments of the present disclosure, the coupling part of the pre-spreading auxiliary tool and the hand-held roller is the top, end or middle of the hand-held part of the pre-spreading auxiliary tool and the hand-held part 25 of the hand-held roller. Optionally, the coupling part is the side of the roller body 40 of the hand-held roller and the working part of the pre-spreading auxiliary tool. Optionally, the coupling part is the connecting part 23 of the hand-held roller and the working part of the pre-spreading auxiliary tool.

[0047] In some other embodiments of the present disclosure, the handheld roller is replaced by a scraper, and the coupling method of the scraper and the pre-spreading auxiliary tool includes a fixed connection, a movable connection, or a combination of independent use. The coupling part is the working part of the pre-spreading auxiliary tool and the left side of the scraper body of the scraper or the top side of the scraper body or the top of the handheld part 25 or the top side of the handheld part 25 or the upper side of the connecting part 23.

[0048] It should be noted that the working surface structure, material, process, and non-stick treatment of the pre-spreading auxiliary tool in the third embodiment may be the same as those of the pre-spreading auxiliary tool in the first embodiment. Embodiment 4

[0049] The present disclosure also provides a method of use, the specific method is as follows: The pre-spreading auxiliary tool used for the paste 10 as described in the above-mentioned embodiment 1 and embodiment 2, the method of use also includes: holding the hand-held part 25 of the pre-spreading auxiliary tool by hand, pressing with the palm, pinching with fingers or inserting with fingers, controlling the working part of the pre-spreading auxiliary tool to act on the paste 10 in a pressing and / or rolling manner, so as to achieve the purpose of preliminarily attaching and / or spreading the paste 10 on a target surface.

[0050] The present disclosure also provides another method of use, which is as follows: The composite spreading tool applied to the paste 10 as described in the third embodiment above, the method of use also includes: in the first stage, holding the hand-held part 25 of the pre-spreading auxiliary tool in the composite spreading tool by hand, pressing with the palm, pinching with fingers or inserting fingers into the hand-held part 25, and controlling the working part of the pre-spreading auxiliary tool to act on the paste 10 in a pressing and / or rolling manner, so as to achieve the purpose of preliminarily attaching and / or spreading the paste 10 on a target surface; in the second stage, holding or pinching the hand-held part 25 of the hand-held roller in the composite spreading tool by hand, controlling the movement of the roller body 40 and acting on the paste 10, forming repeated rolling, so as to achieve the purpose of finally spreading the paste 10.

[0051] Optionally, the hand holding in the above-mentioned usage method is adapted to a pre-spreading auxiliary tool, a hand-held roller or a scraper having a long-handled hand-held portion 25; optionally, the palm pressing in the above-mentioned usage method is adapted to a pre-spreading auxiliary tool in which the hand-held portion 25 and the connecting portion 23 are constructed to utilize any portion on the outer surface of the working portion except the working surface 20; optionally, the finger pinching in the above-mentioned usage method is adapted to a hand-held portion 25 is constructed as two independent finger pinching portions 26 or the hand-held portion 25 is constructed to utilize any portion on the outer surface of the working portion except the working surface 20; optionally, the finger insertion in the above-mentioned usage method is adapted to a hand-held portion 25 is constructed as a pre-spreading auxiliary tool having an opening for finger insertion.

[0052] It should be pointed out that the fixed connection in the present disclosure includes but is not limited to welding, bonding, riveting, bolting, mortise and tenon connection or one-piece molding process.

[0053] It should be noted that the interlaced virtual and real lines on the surface of the figures in the accompanying drawings are only used to display the edges of the inlaid surfaces to represent its three-dimensional spatial form, and do not represent a specific structure or pattern.

[0054] In the description of the present disclosure, it should be understood that the terms "one", "first", "second", "an", "two" (if any) are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "one", "first", "second", "an", "two" may explicitly or implicitly include at least one of the features.

[0055] In addition, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "surface", "side", "inside", "outside", "axial", "radial", "top", "bottom", "end" (if any) and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0056] In addition, in the present disclosure, unless otherwise clearly stipulated and limited, the terms "connection", "coupling", etc. should be understood in a broad sense. For example, it can be a mechanical connection, an electrical connection, or a magnetic connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present disclosure according to the specific circumstances.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A pre-spreading auxiliary tool for a paste, characterized in that: The pre-spreading auxiliary tool comprises: A working portion, the outer surface of which has a working surface, the working surface is configured as a convex curved surface, and the characteristics of the curved surface are defined in mathematical terms as follows: two main curvatures are positive numbers; a hand-held part for manually controlling the pre-spreading auxiliary tool so that the working surface presses and / or rolls the paste; A connecting part is used to connect the working part and the hand-held part, and the connection method includes a fixed connection or a movable connection.

2. The pre-spreading auxiliary tool according to claim 1, characterized in that: The working part includes: The outer surface has a complete closed curved surface; or, the outer surface has an open closed curved surface; or, the outer surface has a non-closed curved surface.

3. The pre-spreading auxiliary tool according to claim 2, characterized in that: The working surface is the whole or part of any one of a sphere, an ellipsoid or a torus; wherein, The whole or part includes: a structure without through holes or blind holes; or a structure with through holes or blind holes; or a structure as a non-closed curved surface.

4. The pre-spreading auxiliary tool according to claim 3, characterized in that: The pre-spreading auxiliary tool comprises: The whole or part of the structure is not provided with through holes or blind holes, and the hand-held part is configured to utilize any part of the outer surface except the working surface; Or, the whole or part of the structure is not provided with through holes or blind holes, and the connection method is a ball-and-socket connection; Or, the whole or part of the structure is provided with a through hole or a blind hole, the through hole or the blind hole is used to engage the connecting part, and the connecting part extends outward and is connected to a hand-held part; Or, the whole or part of the structure is a non-closed curved surface, and the hand-held part is connected to the part of the working part other than the working surface in a fixed connection or a movable connection; Alternatively, the whole or part of the structure is a non-closed curved surface, and the non-closed curved surface is configured to have an opening that can be used for finger insertion.

5. The pre-spreading auxiliary tool according to any one of claims 1 to 4, characterized in that: The pre-spreading auxiliary tool includes: the working surface is subjected to non-stick treatment, and the non-stick treatment is grinding, polishing, spraying lubricant, plating, coating or surface modification; or, the paste is thermal conductive paste.

6. The pre-spreading auxiliary tool according to any one of claims 1 to 5, characterized in that: The handheld part is replaced by an automated mechanical drive part.

7. A composite spreading tool for paste, characterized in that: include: A pre-spreading aid as claimed in any one of claims 1 to 5, and a hand-held roller having a working surface with zero Gaussian curvature; The pre-spreading auxiliary tool and the handheld roller are coupled to form the composite spreading tool, and the coupling method includes: Use fixed coupling, including welding, bonding, riveting, bolting, mortise and tenon connection or one-piece molding process; or, use movable coupling, including hinges, ball joints, sliding joints, universal joints, binders, bearings, telescopic connections or flexible connections; or, use detachable coupling, including snap connections, plug-in connections, quick-release joints, buckle connections or magnetic connections; or, use a combination of independent uses.

8. The composite spreading tool according to claim 7, characterized in that: The composite spreading tool comprises: The coupling method includes the fixed coupling, the movable coupling or the detachable coupling; and the working part of the pre-spreading auxiliary tool is connected to the left side of a roller body or the top end of a hand-held part or the top side of a hand-held part or the upper side of a connecting part included in the hand-held roller in the coupling method, or the hand-held part of the pre-spreading auxiliary tool is connected to a hand-held part included in the hand-held roller in the coupling method.

9. The composite spreading tool according to claim 7 or 8, characterized in that: The hand-held roller is replaced with a scraper.

10. A method of use, characterized in that: The method of use includes: A pre-spreading auxiliary tool for a paste according to any one of claims 1 to 5, wherein the method of use further comprises: holding, pressing, pinching or inserting fingers into the handheld portion of the pre-spreading auxiliary tool, and controlling the working portion of the pre-spreading auxiliary tool to act on the paste in a compressing and / or rolling manner, so as to achieve the purpose of preliminarily attaching and / or spreading the paste on a target surface; or, The composite spreading tool for the paste as described in any one of claims 7 to 9, the method of use also includes: a first stage, holding the hand, pressing the palm, pinching or inserting the fingers into the hand-held part of the pre-spreading auxiliary tool in the composite spreading tool, and controlling the working part of the pre-spreading auxiliary tool to act on the paste in a pressing and / or rolling manner, so as to achieve the purpose of preliminarily attaching and / or spreading the paste on a target surface; a second stage, holding or pinching the hand-held part of the hand-held roller in the composite spreading tool, controlling the movement of the roller body and acting on the paste, forming repeated rolling, so as to achieve the purpose of finally spreading the paste.

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