CN116037432A - Method for preparing surface structure on curved surface - Google Patents
Method for preparing surface structure on curved surface Download PDFInfo
- Publication number
- CN116037432A CN116037432A CN202310163745.9A CN202310163745A CN116037432A CN 116037432 A CN116037432 A CN 116037432A CN 202310163745 A CN202310163745 A CN 202310163745A CN 116037432 A CN116037432 A CN 116037432A
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- CN
- China
- Prior art keywords
- curable coating
- surface structure
- curved surface
- preparing
- flexible film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/17—Dry transfer
- B44C1/1733—Decalcomanias applied under pressure only, e.g. provided with a pressure sensitive adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
Abstract
The invention discloses a method for preparing a surface structure on a curved surface, which comprises the following steps: processing a die surface structure on a planar plate; spraying a first curable coating suitable for forming a flexible film after curing on the planar sheet, the first curable coating covering at least the mold surface structure; after the first curable coating is cured to form a flexible film, separating the flexible film from the planar plate, wherein a transfer printing structure corresponding to the surface structure of the die is formed on the flexible film; spraying a second curable coating on the surface of the curved surface part; covering a flexible film on a curved surface part in a region where a surface structure needs to be prepared; uniformly pressing the flexible film towards the curved surface part, and forming a surface structure on the second curable coating by utilizing the transfer printing structure; after the second curable coating is cured, the flexible film is separated from the curved part. The method for preparing the surface structure on the curved surface has the advantages of low preparation difficulty, high preparation efficiency, strong applicability and the like.
Description
Technical Field
The invention relates to the technical field of surface structure preparation, in particular to a method for preparing a surface structure on a curved surface.
Background
Adding special surface structures to the surface of the part is an important way to increase the surface properties of the part or to reduce friction on the surface of the part.
In the related art, the method for preparing the surface structure directly performs machining on the surface of the part through machining, but for curved surface parts, the difficulty of directly preparing the surface structure through machining is high due to the limitation of the size and the curvature of the part. For example, the preparation of the resistance reducing structure is carried out on the outer surface of the helmet, and the preparation on the outer surface of the helmet by directly adopting mechanical processing is more difficult due to the larger curvature of the outer surface of the helmet.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a method for preparing the surface structure on the curved surface, which has the advantages of low preparation difficulty, high preparation efficiency, strong applicability and the like.
To achieve the above object, according to an embodiment of the present invention, there is provided a method of preparing a surface structure on a curved surface, the method of preparing a surface structure on a curved surface including the steps of: processing a die surface structure on a planar plate; spraying a first curable coating on the planar sheet adapted to form a flexible film after curing, the first curable coating covering at least the mold surface structure; after the first curable coating is cured to form the flexible film, separating the flexible film from the planar sheet, wherein a transfer printing structure corresponding to the surface structure of the die is formed on the flexible film; spraying a second curable coating on the surface of the curved surface part; covering the flexible film on the curved surface part in the area where the surface structure needs to be prepared; uniformly pressing the flexible film towards the curved surface part, and forming the surface structure on the second curable coating by utilizing the transfer printing structure; after the second curable coating is cured, the flexible film is separated from the curved part.
The method for preparing the surface structure on the curved surface has the advantages of low preparation difficulty, high preparation efficiency, strong applicability and the like.
In addition, the method for preparing a surface structure on a curved surface according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the first curable coating is a thermosetting curable coating, a photocurable curable coating, and the second curable coating is a thermosetting curable coating, a photocurable curable coating, or a volatile curable coating.
According to one embodiment of the invention, the first curable coating is a low surface energy material.
According to one embodiment of the invention, the first curable coating is polydimethylsiloxane.
According to one embodiment of the invention, the second curable coating is an epoxy resin.
According to one embodiment of the invention, the surface structure comprises a plurality of ball stud bumps and/or a plurality of ribs.
According to one embodiment of the invention, the mould surface structure is formed in the planar sheet by machining.
According to one embodiment of the invention, the planar sheet is a metal sheet.
According to one embodiment of the invention, the mould surface structure protrudes 0.2-3 mm from the planar sheet.
According to one embodiment of the invention, the method for preparing a surface structure on a curved surface is used for preparing a surface structure of an outer surface of a helmet.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic illustration of a partial process of a method of preparing a surface structure on a curved surface according to an embodiment of the present invention.
Fig. 2 is a schematic illustration of a partial process of a method of preparing a surface structure on a curved surface according to an embodiment of the present invention.
Fig. 3 is a flow chart of a method of preparing a surface structure on a curved surface in accordance with an embodiment of the present invention.
Reference numerals: planar sheet 10, mold surface structure 11, flexible film 20, transfer structure 21, curved part 30, second curable coating 40, surface structure 41.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
A method of preparing a surface structure on a curved surface according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the method for preparing a surface structure on a curved surface according to an embodiment of the present invention includes the steps of:
as shown in step a of fig. 1, a mold surface structure 11 is machined on a planar sheet 10.
As shown in step b of fig. 1, a first curable coating suitable for forming a flexible film after curing is sprayed on the planar sheet 10, said first curable coating covering at least the mould surface structure 11.
After the first curable coating material is cured to form the flexible film 20, the flexible film 20 is separated from the planar sheet 10, and a transfer structure 21 corresponding to the mold surface structure 11 is formed on the flexible film 20, as shown in steps c and d of fig. 1.
As shown in step e of fig. 2, a second curable coating 40 is sprayed onto the surface of the curved surface part 30.
As shown in step f of fig. 2, the flexible film 20 is applied to the curved surface part 30 in the area where the surface structure is to be prepared.
As shown in step f of fig. 2, the flexible film 20 is uniformly pressed against the curved part 30 to form a surface structure 41 on the second curable coating 40 using the transfer structure 21.
After the second curable coating 40 is cured, the flexible film 20 is separated from the curved part 30, as shown in step g of fig. 2.
According to the method for preparing a surface structure on a curved surface of an embodiment of the present invention, the surface structure 41 is prepared on the curved surface part 30 by processing the mold surface structure 11 on the planar sheet 10 and then transferring the mold surface structure 11 on the second curable coating 40 of the curved surface part 30 by using the transfer structure 21 of the flexible film 20 formed of the first curable coating sprayed on the planar sheet 10, thereby forming the surface structure 41 on the second curable coating 40. Compared with the method for directly carrying out mechanical processing in the related art, the surface structure can be transferred through the flexible film 20, the flexible adaptation of the flexible film 20 is utilized to have a curvature curved surface, the problem that the mechanical processing is difficult to directly process on the curved surface is avoided, the preparation difficulty of the surface structure on the curved surface is reduced, the preparation efficiency of the surface structure on the curved surface is improved, and the flexible film 20 has flexibility and can be suitable for curved surfaces with different curvatures, so that the method for preparing the surface structure on the curved surface can be suitable for preparing the surface structure on the curved surface with larger curvature.
Therefore, the method for preparing the surface structure on the curved surface has the advantages of low preparation difficulty, high preparation efficiency, strong applicability and the like.
A method of preparing a surface structure on a curved surface according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Alternatively, the first curable coating is a thermosetting curable coating, a photo-curing curable coating, and the second curable coating 40 is a thermosetting curable coating, a photo-curing curable coating, or a volatile curable coating. This prevents the curing process of the second curable coating 40 from interfering with the first curable coating, making the formation of the surface structure 41 more reliable.
Advantageously, the first curable coating is a low surface energy material. This facilitates separation of flexible film 20 from planar sheet 10 and second curable coating 40.
Further, the first curable coating is polydimethylsiloxane. This allows the first curable coating material to have good heat curing properties, allowing the flexible film 20 formed by curing the first curable coating material to have a low surface energy and good flexibility.
Still further, the second curable coating 40 is an epoxy resin. Specifically, the second curable coating 40 is fully curable at 80 degrees celsius for half an hour. This allows the second curable coating material 40 to have good heat curing characteristics, and also allows the second curable coating material 40 to have good bonding ability with the curved surface part 30 after curing.
Specifically, as shown in FIG. 2, the surface structure 41 includes a plurality of ball stud bumps and/or a plurality of ribs. Of course, the surface structure 41 may also be a groove. This can facilitate the formation of surface structures 41, such as drag reducing structures, that have a drag effect on the curved surface.
More specifically, the mold surface structure 11 is formed on the planar sheet 10 by machining. This facilitates the processing of the die surface structure 11 on the planar sheet 10.
Alternatively, the planar sheet 10 is a metal sheet. The planar sheet 10 is preferably an aluminum sheet. This facilitates processing of the mold surface structure 11, and ensures rigidity of the mold surface structure 11, improving dimensional accuracy of the transfer structure 21 on the flexible film 20, and thus improving dimensional accuracy of the surface structure 41.
Further, the height of the mold surface structure 11 protruding from the planar sheet 10 is 0.2-3 mm. This may facilitate a reduction in the amount of the first curable coating material while ensuring a reliable formation of the transfer structure 21.
Alternatively, the method of preparing a surface structure on a curved surface is used for preparing a surface structure of an outer surface of a helmet. Specifically, the method for preparing the surface structure on the curved surface is used for preparing the resistance reducing structure on the outer surface of the helmet. Therefore, the problem that the large-curvature curved surface of the outer surface of the helmet is difficult to directly adopt mechanical processing to prepare the resistance reducing structure can be solved, and the surface structure can be conveniently prepared on the outer surface of the helmet.
In particular, the helmet may be a sports helmet.
The sports helmet comprises a helmet main body, wherein the outer surface of the helmet main body is provided with a top resistance-reducing area and two side resistance-reducing areas, the top resistance-reducing area is positioned at the top of the helmet main body, and the two side resistance-reducing areas are respectively positioned at the left side and the right side of the top resistance-reducing area; the resistance reducing convex points are arranged in the top resistance reducing area; the side portion resistance-reducing areas are respectively provided with a plurality of resistance-reducing ribs.
According to the sports helmet with the surface resistance reducing structure, when a wearer wears the sports helmet to do high-speed sports, part of air flow can pass through two sides of the sports helmet and is converged again after passing through the rear part of the helmet, part of air flow can pass through the top part of the sports helmet, and air flow below the sports helmet can not pass through the sports helmet due to the blocking of the head of the wearer.
And, through the structure of hinder that falls that hinder bump and fall hinder the muscle falls in the surface setting of helmet main part, can avoid influencing the inside safety structure design of sports helmet to guarantee the reliability of sports helmet that has the structure of hinder falls on the surface.
Specifically, the length direction of the drag reducing ribs extends along the warp direction of the helmet main body, the extension lines of the front ends of the drag reducing ribs intersect at the front end of the helmet main body, and the extension lines of the rear ends of the drag reducing ribs intersect at the rear end of the helmet main body. Therefore, the air flow can be smoothly dispersed and converged through the guiding of the resistance reducing ribs, the front-rear pressure difference of the sports helmet is further facilitated to be reduced, and the air resistance of the sports helmet with the surface resistance reducing structure is further facilitated to be reduced.
More specifically, the plurality of resistance-reducing protruding points are arranged in a plurality of rows at intervals along the left-right direction, each row comprises a plurality of resistance-reducing protruding points which are arranged in an arc shape along the front-back direction, and two adjacent rows of resistance-reducing protruding points are at least partially staggered in the left-right direction. It should be understood that the "front-rear direction arc arrangement" does not mean that the plurality of resistance-reducing protrusions are arranged in a straight line in the front-rear direction, but means that the plurality of resistance-reducing protrusions are arranged in the front-rear direction along the arc-shaped curved surface of the helmet body. Therefore, the disturbance effect of the plurality of resistance reducing protruding points on the air flow can be improved, the air flow is further prevented from forming an air layer, and the air resistance of the sports helmet with the surface resistance reducing structure is further reduced.
Optionally, the resistance-reducing convex points are spherical crowns, and the section of the resistance-reducing ribs in the direction vertical to the length direction is a triangle with arc transition at the outer vertex. Thus, the air resistance generated by the resistance reducing ribs and the resistance reducing salient points can be conveniently reduced.
Advantageously, a plurality of drag reduction salient points are symmetrically arranged left and right, and drag reduction ribs in the drag reduction areas of the two side parts are symmetrically arranged. In other words, the resistance reducing ribs in the resistance reducing region of one side are symmetrically arranged with the resistance reducing ribs in the resistance reducing region of the other side. On the one hand, the air flow flowing through the sports helmet can be more uniform, so that the air resistance of the sports helmet is further reduced, and on the other hand, the appearance of the sports helmet is more neat and attractive.
Optionally, the maximum distance between two adjacent resistance-reducing ribs in one side resistance-reducing region is 1-3 times of the width of the resistance-reducing ribs. Preferably 1-2 times here. Therefore, a reasonable distance is reserved between the two resistance reducing ribs, and the air resistance generated by the resistance reducing ribs is reduced under the condition of ensuring the guiding effect on the air flow.
The distance between two adjacent resistance reducing convex points is 1-4 times of the projected diameter of the resistance reducing convex points on the outer surface of the helmet main body. Here, 2 to 3 times are preferred. Therefore, a reasonable distance is reserved between the two resistance reducing convex points, and the air resistance generated by the resistance reducing convex points is reduced under the condition of ensuring the disturbance effect on the air flow.
Further, the height of the resistance-reducing rib is 1-3 mm and the width is 1-3 mm higher than the outer surface of the helmet main body. It is preferable that the height of the resistance-reducing rib is 1-2 mm and the width is 1-2 mm above the outer surface of the helmet body. Therefore, the resistance reducing rib has reasonable size, and the air resistance generated by the resistance reducing rib is reduced under the condition of ensuring the guiding effect on the air flow.
The height of the resistance reducing salient points is 0.1-2 mm higher than the outer surface of the helmet main body, and the projection diameter of the resistance reducing salient points on the outer surface of the helmet main body is 1-4 mm. It is preferred here that the height of the resistance-reducing bump above the outer surface of the helmet body is 0.2-1 mm and the diameter projected on the outer surface of the helmet body is 2-3 mm. Therefore, the resistance reducing salient points have reasonable sizes, and the air resistance generated by the resistance reducing salient points is reduced under the condition of ensuring the disturbance effect on the air flow.
Other configurations and operations of methods of preparing surface structures on curved surfaces according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of producing a surface structure on a curved surface, comprising the steps of:
processing a die surface structure on a planar plate;
spraying a first curable coating on the planar sheet adapted to form a flexible film after curing, the first curable coating covering at least the mold surface structure;
after the first curable coating is cured to form the flexible film, separating the flexible film from the planar sheet, wherein a transfer printing structure corresponding to the surface structure of the die is formed on the flexible film;
spraying a second curable coating on the surface of the curved surface part;
covering the flexible film on the curved surface part in the area where the surface structure needs to be prepared;
uniformly pressing the flexible film towards the curved surface part, and forming the surface structure on the second curable coating by utilizing the transfer printing structure;
after the second curable coating is cured, the flexible film is separated from the curved part.
2. The method of preparing a surface structure on a curved surface according to claim 1, wherein the first curable coating is a thermosetting curable coating, a photo-curing curable coating, and the second curable coating is a thermosetting curable coating, a photo-curing curable coating, or a volatile curable coating.
3. The method of preparing a surface structure on a curved surface according to claim 1, wherein said first curable coating is a low surface energy material.
4. The method of preparing a surface structure on a curved surface according to claim 1, wherein said first curable coating is polydimethylsiloxane.
5. The method of preparing a surface structure on a curved surface according to claim 1, wherein the second curable coating is an epoxy resin.
6. The method of preparing a surface structure on a curved surface according to claim 1, wherein the surface structure comprises a plurality of ball stud bumps and/or a plurality of ribs.
7. The method of preparing a surface structure on a curved surface according to claim 1, wherein the mold surface structure is formed on the planar sheet by machining.
8. The method of producing a surface structure on a curved surface according to claim 1, wherein the planar sheet is a metal sheet.
9. The method of producing a surface structure on a curved surface according to claim 1, wherein the mold surface structure protrudes from the planar sheet by 0.2-3 mm.
10. The method of preparing a surface structure on a curved surface according to claim 1, wherein the method of preparing a surface structure on a curved surface is used for preparing a surface structure of an outer surface of a helmet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310163745.9A CN116037432A (en) | 2023-02-16 | 2023-02-16 | Method for preparing surface structure on curved surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310163745.9A CN116037432A (en) | 2023-02-16 | 2023-02-16 | Method for preparing surface structure on curved surface |
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| Publication Number | Publication Date |
|---|---|
| CN116037432A true CN116037432A (en) | 2023-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310163745.9A Pending CN116037432A (en) | 2023-02-16 | 2023-02-16 | Method for preparing surface structure on curved surface |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665657A (en) * | 2002-07-01 | 2005-09-07 | 埃西勒国际通用光学公司 | Process for making a mold piece having a main curved surface bearing a utilitary microstructure |
-
2023
- 2023-02-16 CN CN202310163745.9A patent/CN116037432A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665657A (en) * | 2002-07-01 | 2005-09-07 | 埃西勒国际通用光学公司 | Process for making a mold piece having a main curved surface bearing a utilitary microstructure |
Non-Patent Citations (1)
| Title |
|---|
| YANQING WANG ET AL.: "Aerodynamic Drag Reduction on Speed Skating Helmet by Surface Structures", 《APPLIED SCIENCES》, vol. 13, no. 1, pages 1 - 16 * |
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