CN114554761B - Shell manufacturing method, shell and electronic equipment - Google Patents
Shell manufacturing method, shell and electronic equipment Download PDFInfo
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- CN114554761B CN114554761B CN202210194956.4A CN202210194956A CN114554761B CN 114554761 B CN114554761 B CN 114554761B CN 202210194956 A CN202210194956 A CN 202210194956A CN 114554761 B CN114554761 B CN 114554761B
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- fiber prepreg
- frame structure
- injection molding
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- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000835 fiber Substances 0.000 claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 66
- 230000002093 peripheral effect Effects 0.000 claims abstract description 63
- 239000000758 substrate Substances 0.000 claims abstract description 59
- 238000001746 injection moulding Methods 0.000 claims abstract description 55
- 239000011159 matrix material Substances 0.000 claims abstract description 49
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 35
- 239000004033 plastic Substances 0.000 claims abstract description 35
- 229920003023 plastic Polymers 0.000 claims abstract description 35
- 238000000465 moulding Methods 0.000 claims abstract description 25
- 238000010030 laminating Methods 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 175
- 239000000463 material Substances 0.000 claims description 52
- 239000003365 glass fiber Substances 0.000 claims description 41
- 238000003698 laser cutting Methods 0.000 claims description 31
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 11
- 239000003063 flame retardant Substances 0.000 claims description 11
- 238000005538 encapsulation Methods 0.000 claims description 10
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 24
- 238000002360 preparation method Methods 0.000 abstract description 10
- 238000002347 injection Methods 0.000 description 35
- 239000007924 injection Substances 0.000 description 35
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000003973 paint Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 8
- 238000002791 soaking Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000002657 fibrous material Substances 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation method of a shell, the shell and electronic equipment, wherein the preparation method of the shell comprises the following steps: sequentially laminating a plurality of fiber prepreg layers to form a laminated sheet, wherein the laminated sheet comprises a first side and a second side which are arranged in a deviating way, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers; performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure; forming a frame structure at the peripheral outer edge of the shell matrix by adopting an injection molding process to obtain a shell; wherein, the frame structure is a plastic structure. By adopting the method, the frame structure of the plastic structure is formed at the peripheral edge of the shell substrate, and the frame structure can cover burrs generated by cutting the peripheral edge of the shell substrate, so that the problem that burrs exist at the peripheral edge of the obtained shell is avoided, and the dimensional accuracy of the outer contour of the shell can be improved.
Description
Technical Field
The invention belongs to the technical field of electronic equipment, and particularly relates to a shell manufacturing method, a shell and electronic equipment.
Background
With the increasing requirements of intelligent terminal equipment on lightness, thinness and reliability, the mechanical reliability and unique texture characteristics of the aramid fiber composite material make the application of the aramid fiber composite material in the fields of three products, namely computers, communication and consumer electronics, gradually rise, and in recent years, some aramid fiber composite materials are applied to products such as terminal protective shells, terminal backshells and the like.
In the related art, an aramid fiber composite material shell with an arc surface structure is cut by adopting a cutting method.
However, by adopting the cutting method, burrs are easily generated in the cutting process due to extremely strong toughness of the aramid fiber, and the precision of the outer contour of the shell obtained by cutting is insufficient.
Disclosure of Invention
The invention aims to provide a preparation method of a shell, the shell and electronic equipment, and at least solves the problems that burrs exist in the processing of an aramid fiber composite shell and the accuracy of the outer contour dimension of the shell is insufficient in the prior art.
In order to solve the technical problems, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for manufacturing a shell, including:
Sequentially laminating a plurality of fiber prepreg layers to form a laminated sheet, wherein the laminated sheet comprises a first side and a second side which are arranged in a deviating manner, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers;
performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure;
forming a frame structure on the peripheral outer edges of the shell matrix by adopting an injection molding process to obtain a shell; wherein, the frame structure is a plastic structure.
In a second aspect, embodiments of the present invention provide a housing made by the method of any one of the above.
In a third aspect, an embodiment of the present invention proposes an electronic device comprising a housing as described above.
In the embodiment of the invention, a plurality of fiber prepreg layers are sequentially laminated to form a laminated sheet, and the fiber prepreg layer on at least one side of the laminated sheet is an aramid fiber prepreg layer; performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure; forming a frame structure at the peripheral outer edge of the shell matrix by adopting an injection molding process to obtain a shell; wherein, the frame structure is a plastic structure. According to the shell manufacturing method, the frame structure of the plastic structure is formed on the peripheral outer edge of the shell substrate, and the frame structure can cover burrs generated by cutting of the peripheral outer edge of the shell substrate, so that the problem that burrs exist on the peripheral edge of the obtained shell is avoided. And, the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, and the frame structures with different arc structures can be obtained through the design of the cavity structure of the injection mold, so that the problem of insufficient accuracy of the outer contour dimension of the shell due to inaccurate cutting is avoided, and the dimension accuracy of the outer contour of the shell is convenient to improve.
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 flow chart of steps of a method for manufacturing a shell according to an embodiment of the present invention;
FIG. 2 is a flowchart showing another step of a method for manufacturing a housing according to an embodiment of the present invention;
FIG. 3 is a flowchart showing a further step of a method for manufacturing a housing according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the first surface of the housing according to the embodiment of the present invention;
FIG. 5 is a schematic view of a structure of a second surface of a housing according to an embodiment of the present invention;
FIG. 6 is an enlarged partial view of portion A of FIG. 5 provided by an embodiment of the present invention;
FIG. 7 is a schematic view of a shell structure layer according to an embodiment of the present invention;
Fig. 8 is a schematic structural diagram of another shell structure layer according to an embodiment of the present invention.
Reference numerals:
11. A shell base; 12. a frame structure; 13. a glue pulling structure; 111. an ink layer; 112. a first aramid fiber prepreg layer; 113. a glass fiber prepreg layer; 114. a second aramid fiber prepreg layer; 115. and (3) a paint layer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The features of the invention "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, the term "and/or" in the description and claims means at least one of the connected objects.
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.
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 will be understood in specific cases by those of ordinary skill in the art.
The following describes in detail a method for preparing a shell according to the embodiment of the present invention through specific embodiments and application scenarios thereof with reference to the accompanying drawings.
Example 1
Referring to fig. 1, a step flow chart of an embodiment of a method for manufacturing a shell according to an embodiment of the present invention may specifically include the following steps:
Step 101, sequentially laminating a plurality of fiber prepreg layers to form laminated sheets, wherein the laminated sheets comprise a first side and a second side which are arranged in a deviating manner, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers.
In the embodiment of the invention, a plurality of prefabricated fiber prepreg layers are sequentially stacked according to layers to obtain the laminated sheet comprising a plurality of fiber prepreg layers, wherein the laminated sheet comprises a first side and a second side which are away from each other, and the fiber prepreg layers on at least one side are aramid fiber prepreg layers in the first side and the second side, so that when the shell is made of the laminated sheet, the outermost layer on at least one side of the shell is provided with an aramid fiber prepreg layer structure, and the shell is provided with mechanical reliability and unique texture characteristics of an aramid fiber composite material.
Specifically, the fiber prepreg layer is formed by compounding fiber cloth and thermosetting resin, the fiber material can be made into the fiber cloth by weaving and the like, and the resin material is coated or impregnated on the surface and gaps of the fiber cloth to form the fiber prepreg layer.
The fiber cloth can be made of fiber materials such as aramid fiber, glass fiber, carbon fiber and the like, and the thermosetting resin can be made of thermosetting resin materials such as epoxy resin, phenolic resin, unsaturated polyester resin, acrylic resin and the like.
Specifically, the thickness of the fiber prepreg layer may be 0.1 to 0.3mm, alternatively, the thickness of the fiber prepreg layer may be any value of 0.1mm, 0.2mm, 0.3mm, etc., the thickness of the fiber prepreg layer may be determined according to the performance of the fiber prepreg layer material and the thickness of the prepared shell, and the thickness of the specific fiber prepreg layer may be set according to actual needs, which is not limited in the embodiment of the present invention.
Specifically, the fiber prepreg layers of each layer in the laminate sheet may be made of different materials, for example, as shown in fig. 7, a laminated structure may be formed by sequentially laminating a first aramid fiber prepreg layer 112, a glass fiber prepreg layer 113, and a second aramid fiber prepreg layer 114. It should be noted that the number of the fiber prepreg layers constituting the laminate and the material of each fiber prepreg layer may be selected according to the need, which is not repeated in the embodiment of the present invention
Optionally, before stacking the plurality of fiber prepreg layers in sequence to form a laminate, the method may further include: and determining the preset size of each fiber prepreg layer according to the size of the shell, and cutting the fiber prepreg layers according to the preset size.
Specifically, the preset size of each fiber prepreg layer is determined according to the external dimension of the prepared shell, wherein the preset size comprises the length and the width of the fiber prepreg layer, and then each fiber prepreg layer is cut according to the determined preset size.
It should be noted that, the preset dimensions of each fiber prepreg layer may be the same or different, when the preset dimensions of each fiber prepreg layer are different, the thickness of each part of the obtained shell substrate is not uniform after the lamination sheet formed by the multiple fiber prepreg layers is subjected to hot press molding, for example, the shell with thin edges and thick middle can be obtained through the multiple fiber prepreg layers with different preset dimensions so as to meet different application scenes of the shell.
And 102, performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure.
In the embodiment of the invention, the laminated sheet is placed into a prefabricated mold for hot press molding, and under the action of certain temperature and pressure, the resin materials in the multi-layer fiber prepreg layer are crosslinked and cured, so that a shell matrix with at least one side edge having an arc-shaped structure is formed.
Specifically, the cavity structure of the corresponding hot-press mold can be designed according to the appearance structure of the shell matrix, so that the shell matrix with the arc-shaped structure can be obtained through hot-press molding of the mold.
It should be noted that, the hot press molding process adopted in the hot press molding of the laminated sheet may be based on the material performance of the fiber prepreg layer, and the embodiment of the present invention will not be described herein.
Specifically, the laminated sheet may be placed in a forming mold, then the mold is placed in a vacuum aluminum foil bag, vacuum sealing treatment is performed, and then the laminated sheet is placed in an autoclave, and high-temperature and high-pressure treatment is performed under preset temperature, pressure and time conditions, so that a shell substrate having a certain arc-shaped structure is formed.
Alternatively, the preset temperature may be 100 to 180 ℃, specifically, the preset temperature may be any temperature of 100 ℃, 130 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃ and the like, and of course, different preset temperatures may be selected according to the specific materials constituting the fiber prepreg layer, which is not limited in the embodiment of the present invention.
Alternatively, the preset pressure is 0.8-1.5 Mpa, specifically, the preset pressure may be any pressure of 0.8Mpa, 1.0Mpa, 1.2Mpa, 1.5Mpa, etc., and of course, different preset pressures may be selected according to the specific materials constituting the fiber prepreg layer, which is not limited in the embodiment of the present invention.
Optionally, the preset time is 2-4 h, specifically, the preset time may be any time of 2h, 2.5h, 3h, 3.5h, 4h, and the like, and of course, different preset times may also be selected according to the specific materials that make up the fiber prepreg layer, which is not limited in the embodiment of the present invention.
Step 103, forming a frame structure on the peripheral outer edges of the shell matrix by adopting an injection molding process so as to obtain a shell; wherein, the frame structure is a plastic structure.
Specifically, a shell substrate obtained by hot press molding is placed in a prefabricated injection mold, plastic materials are adopted for injection molding, a frame structure is injection molded at the peripheral outer edges of the shell substrate, and the molded frame structure is a plastic structure. As shown in fig. 4 to 6, the resulting housing includes a housing base 11 and a rim structure 12, the rim structure 12 being wrapped around an outer edge of the housing base 11.
Specifically, the cavity structure of the corresponding injection mold can be designed according to the outline structure of the frame structure, so that the frame structure with the arc-shaped structure can be obtained through injection molding of the injection mold.
It should be noted that, in the embodiment of the present invention, the injection molding process may be based on the plastic material selected for injection molding, and the embodiment of the present invention will not be described herein.
Specifically, as the injection molding process is adopted, the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, and therefore, the frame structures with different arc structures can be obtained through the design of the cavity structure of the injection mold. The frame structure of the plastic structure is formed at the peripheral outer edge of the shell base body by adopting an injection molding process, and burrs generated by cutting the peripheral outer edge of the shell base body can be coated through the frame structure, so that the problem that burrs exist at the peripheral edge of the obtained shell is avoided.
It should be noted that, in the embodiment of the present invention, the frame structure may be an integrally formed structure or a step-shaped structure, and those skilled in the art may set the frame structure according to needs, which is not limited in the embodiment of the present invention.
In summary, the method for preparing a shell according to the embodiment of the present invention may at least include the following advantages:
In the embodiment of the invention, the preparation method of the shell comprises the following steps: sequentially laminating a plurality of fiber prepreg layers to form laminated sheets, wherein the fiber prepreg layers on at least one side of the laminated sheets are aramid fiber prepreg layers; performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure; forming a frame structure on the peripheral outer edges of the shell matrix by adopting an injection molding process to obtain a shell; wherein, the frame structure is a plastic structure. By adopting the method, the frame structure of the plastic structure is formed at the peripheral edge of the shell substrate, and the frame structure can cover burrs generated by cutting the peripheral edge of the shell substrate, so that the problem of burrs at the peripheral edge of the obtained shell is avoided. In addition, due to the adoption of an injection molding process, the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, so that the frame structures with different arc structures can be obtained through the design of the cavity structure of the injection mold, and the problem of insufficient accuracy of the outer contour dimension of the shell due to inaccurate cutting is avoided.
Example two
Referring to fig. 2, a flowchart illustrating steps of an embodiment of a method for manufacturing another shell according to an embodiment of the present invention may specifically include the following steps:
Step 201, sequentially laminating a plurality of fiber prepreg layers to form a laminated sheet, wherein the laminated sheet comprises a first side and a second side which are arranged away from each other, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers.
Specifically, the implementation process of this step may be performed with reference to step 101 in the first embodiment, which is not described herein.
And 202, performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure.
Specifically, the implementation process of this step may be performed with reference to step 102 in the first embodiment, which is not described herein.
And 203, processing the peripheral outer edges of the shell matrix by adopting a laser cutting process to obtain an initial shell matrix.
Specifically, after the shell matrix is obtained, the laser cutting process can be adopted to carry out laser cutting processing on the appearance of the shell matrix according to the appearance structure of the shell, redundant materials on the peripheral outer edges of the shell matrix are removed, so that an initial shell matrix with preset size and appearance structure is obtained, and the first shell matrix is matched with an injection mold during injection molding, so that a frame structure with higher dimensional accuracy is obtained. The preset size and the preset shape of the initial substrate can be determined according to the external dimension and the structure of the prepared shell, which is not described in detail in the embodiment of the present invention.
It should be noted that, the laser cutting may be performed by using a carbon dioxide laser cutting machine, or may be performed by using an ultraviolet laser cutting machine, or may be performed by using other types of laser cutting machines, and the specific laser cutting process may be performed according to the type of the laser cutting machine selected, and reference is made to the existing laser cutting process.
Step 204, forming an encapsulation groove at the outer edge of the initial shell substrate by adopting a laser cutting process to obtain a first shell substrate, wherein the encapsulation groove extends from the edge of the first shell substrate to one side of the first shell substrate away from the edge.
Specifically, the outer edge of the initial housing base is laser engraved using a laser cutting process to form an encapsulation groove extending from the outer edge of the first housing base to a side of the first housing base remote from the edge. Through processing the rubber coating recess in the outward flange department of shell base member, the area of combining of plastic material and shell base member is increased in the time of the injection moulding of being convenient for to increase the bonding strength of frame structure and shell base member.
Alternatively, as shown in fig. 4 to 6, the case base includes a first surface and a second surface facing away from the arrangement, the encapsulation groove may be processed on the first surface of the case base, and the encapsulation groove may be unprocessed on the second surface, and the second surface may be used as an exterior surface of the case when the case is processed from the case base, wherein the exterior surface of the case refers to a surface facing a user when the case is applied to an electronic device, so that the aesthetic degree of the exterior surface of the case may be maintained.
Specifically, a laser cutting process may be used to machine the encapsulation groove on the first surface of the initial shell substrate near the peripheral edge, thereby increasing the bonding area between the plastic material and the shell substrate and increasing the bonding strength between the frame structure and the shell substrate.
Optionally, as shown in fig. 4, an uneven glue pulling structure 13 is formed at the junction of the frame structure 12 and the shell substrate 11, so that the bonding area of the plastic material and the shell substrate can be further increased, and the bonding strength of the frame structure and the shell substrate can be increased.
Alternatively, the depth of the encapsulation groove processed by laser cutting is 1/3 to 2/3 of the thickness of the shell base, and the processing depth of the encapsulation groove can be set as required, which is not limited in the embodiment of the present invention.
Step 205, forming a frame structure on the peripheral outer edges of the first shell substrate by adopting an injection molding process so as to obtain a shell; wherein, the frame structure is a plastic structure.
Specifically, the first shell substrate is placed in a prefabricated injection mold, injection molding is performed by adopting a plastic material, the frame structure is formed by injection molding at the peripheral outer edges of the first shell substrate, and the formed frame structure is a plastic structure.
Specifically, the cavity structure of the corresponding injection mold can be designed according to the outline structure of the frame structure, so that the frame structure with the arc-shaped structure can be obtained through injection molding of the injection mold.
It should be noted that, in the embodiment of the present invention, the injection molding process may be based on the plastic material selected for injection molding, and the embodiment of the present invention will not be described herein. Specifically, as the injection molding process is adopted, the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, and therefore, the frame structures with different cambered surface structures can be obtained through the design of the cavity structure of the injection mold.
Optionally, the plastic material may be a resin-based fiber reinforced composite material, where the resin-based fiber reinforced composite material is formed by compounding a resin material and a fiber material, and the resin material may be a polyamide material (Polyamide, abbreviated as PA), a Polycarbonate material (abbreviated as PC), or the like, and the fiber material may be a glass fiber, a carbon fiber, a polyester fiber, or the like.
Specifically, the plastic material may be a composite material of polycarbonate material and glass fiber, wherein the content of the glass fiber is 20wt%. Further, the plastic material may be a flame-retardant fiber reinforced resin material, so as to meet the requirement of the housing on flame retardant performance in application, it is understood that the flame retardant grade of the flame-retardant fiber reinforced resin material may be selected according to the requirement of the application scene of the actual housing, and the embodiment of the invention will not be repeated.
Optionally, when processing the outer edge around the shell base member in order to obtain first shell base member, processing corresponding location structure of moulding plastics on first shell base member to first shell base member is when carrying out injection moulding, can be through location that location structure and injection mould are better, helps improving injection moulding's precision.
Alternatively, the cavity structure of the corresponding injection mold can be designed according to the outline structure of the frame structure, so that the frame structure with the arc-shaped structure can be obtained through injection molding of the injection mold.
It should be noted that, in the embodiment of the present invention, the injection molding process may be based on the plastic material selected for injection molding, and the embodiment of the present invention will not be described herein.
Specifically, in the embodiment of the present invention, the forming, by using an injection molding process, a frame structure at the peripheral outer edge of the shell substrate may specifically include:
coating an adhesive layer on the peripheral outer edges of the shell matrix; and forming a frame structure on the adhesive layer of the shell matrix by adopting an injection molding process.
Specifically, the bonding layer can be coated in advance at the position where the peripheral outer edge of the shell substrate is combined with the frame structure, so that the bonding force between the frame structure and the shell substrate can be increased when the frame structure is injection molded, and the bonding strength between the frame structure and the shell substrate can be improved.
Further, after the peripheral outer edge of the shell matrix is coated with the adhesive layer, the shell matrix coated with the adhesive layer is placed in an injection mold, and a frame structure is formed on the adhesive layer of the shell matrix by adopting an injection molding process. Specifically, one or more layers of adhesive can be coated at the position where the peripheral outer edge of the shell substrate is combined with the frame structure, wherein the adhesive can be a room temperature curing adhesive, a high temperature curing adhesive or other types of adhesives can be selected, and the specific adhesive type can be selected according to the shell substrate material and the frame structure material.
After the adhesive is coated on the peripheral outer edges of the shell substrate, the shell substrate is dried or pre-cured at room temperature according to the curing process of the specific adhesive, and the specific curing process of the adhesive can be determined according to the type of the selected adhesive, which is not described herein.
It can be understood that the injection molding process can be used to comprehensively consider the performances of the adhesive, the plastic material and the shell base material, and the embodiment of the present invention is not described herein.
In summary, the method for preparing a shell according to the embodiment of the present invention may at least include the following steps:
In the embodiment of the invention, the preparation method of the shell comprises the following steps: sequentially laminating a plurality of fiber prepreg layers to form a laminated sheet, wherein the laminated sheet comprises a first side and a second side which are arranged in a deviating manner, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers; performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure; and forming a frame structure at the outer edge of the periphery of the shell matrix by adopting an injection molding process, wherein the frame structure is a plastic structure. Through injection molding process, form the frame structure that has plastic structure at the peripheral outward flange of shell base member, the frame structure can be with the peripheral outward flange of shell base member because the burr cladding that the cutting produced to the problem that the burr exists at the peripheral edge of the casing that has avoided obtaining. In addition, due to the adoption of an injection molding process, the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, so that the frame structures with different arc structures can be obtained through the design of the cavity structure of the injection mold, and the problem of insufficient accuracy of the outer contour dimension of the shell due to inaccurate cutting is avoided.
Example III
Referring to fig. 3, a flowchart illustrating steps of an embodiment of a method for manufacturing a shell according to an embodiment of the present invention may specifically include the following steps:
Step 301, sequentially laminating a plurality of fiber prepreg layers to form laminated sheets, wherein the laminated sheets comprise a first side and a second side which are arranged away from each other, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers; the multi-layer fiber prepreg layers at least comprise one glass fiber prepreg layer, and the size of the glass fiber prepreg layer is larger than that of the other fiber prepreg layers.
Specifically, the preset size of each fiber prepreg layer is determined according to the size of the shell, and the fiber prepregs are cut according to the preset size, wherein the selected fiber prepregs at least comprise aramid fiber prepregs and glass fiber prepregs, and the cutting size of the glass fiber prepregs is larger than that of other fiber prepregs.
Specifically, a plurality of prefabricated fiber prepreg layers are sequentially stacked according to layers, and a laminated sheet comprising a plurality of fiber prepreg layers can be obtained, wherein the laminated sheet comprises a first side and a second side which are away from each other, and the fiber prepreg layers on at least one side are aramid fiber prepreg layers in the first side and the second side, so that when a shell is made of the laminated sheet, the outermost layer on at least one side of the shell is provided with an aramid fiber prepreg layer structure, and the shell is provided with mechanical reliability and unique texture characteristics of an aramid fiber composite material.
When the laminated sheets are formed by laminating the plurality of fiber prepreg layers in sequence, at least one glass fiber prepreg layer is contained in the plurality of fiber prepreg layers, and in the laminated sheets formed by lamination, the size of the glass fiber prepreg layer is larger than that of other fiber prepreg layers, and when the laminated sheets are formed, the peripheral outer edges of the laminated sheets are all glass fiber prepreg layers. For example, as shown in fig. 8, the shell substrate includes three fiber prepregs, which are respectively formed by sequentially laminating a first aramid fiber prepreg layer 112, a glass fiber prepreg layer 113 and a second aramid fiber prepreg layer 114, wherein the size of the glass fiber prepreg layer 113 is larger than the sizes of the first aramid fiber prepreg layer 112 and the second aramid fiber prepreg layer 114, and the outer edge of the shell substrate is the glass fiber prepreg layer 113.
Step 302, performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure; the edges of the shell matrix are glass fiber prepreg layers.
Specifically, the cavity structure of the corresponding hot-press mold can be designed according to the appearance structure of the shell matrix, so that the shell matrix with the arc-shaped structure can be obtained through hot-press molding of the mold. It should be noted that, the hot press molding process adopted in the hot press molding of the laminated sheet may be based on the material performance of the fiber prepreg layer, and the embodiment of the present invention will not be described herein.
Specifically, a shell substrate obtained by hot press molding is placed in a prefabricated injection mold, plastic materials are adopted for injection molding, a frame structure is injection molded on a glass fiber prepreg layer at the peripheral outer edge of the shell substrate, and the molded frame structure is of a plastic structure.
Specifically, the laminated sheet is placed into a prefabricated mold for hot press molding, and under the action of certain temperature and pressure, the resin materials in the multi-layer fiber prepreg layer are crosslinked and cured, so that a shell matrix with at least one side edge having an arc-shaped structure is formed.
Since the glass fiber prepreg layers in the laminate are larger in size than the other fiber prepregs, the glass fiber prepregs are formed on the peripheral outer edges of the laminate when the laminate is formed, and therefore, the glass fiber prepregs are formed on the outer edge portions of the heat press molded shell substrate.
And 303, processing the glass fiber prepreg layer at the peripheral outer edge of the shell substrate by adopting a laser cutting process to obtain a second shell substrate.
Specifically, a glass fiber prepreg layer at the peripheral outer edge of the shell substrate is cut by a laser cutting process to obtain a second shell substrate. When the glass fiber prepreg layer is cut by a laser cutting process, burrs generated at the cutting part are less, and compared with the cutting of the aramid fiber prepreg layer by the laser cutting process, the cutting surface is smoother, so that the accuracy of the outer contour dimension of the shell is improved.
The laser cutting can be performed by a carbon dioxide laser cutting machine, an ultraviolet laser cutting machine or other types of laser cutting machines, and the specific laser cutting process can be performed according to the type of the selected laser cutting machine, and the embodiment of the invention is not repeated herein with reference to the existing laser cutting process.
Step 304, forming a frame structure on the peripheral outer edges of the second shell matrix by adopting an injection molding process so as to obtain a shell; wherein, the frame structure is a plastic structure.
Specifically, the second shell matrix obtained through processing is placed in a prefabricated injection mold, plastic materials are adopted for injection molding, and a frame structure is formed on the glass fiber prepreg layers of the peripheral outer edges of the second shell matrix through injection molding.
Specifically, the cavity structure of the corresponding injection mold can be designed according to the outline structure of the frame structure, so that the frame structure with the cambered surface structure can be obtained through injection molding of the injection mold. It should be noted that, in the embodiment of the present invention, the injection molding process may be based on the plastic material selected for injection molding, and the embodiment of the present invention will not be described herein.
The outer surface shape of the frame structure is determined by the cavity of the injection mold by adopting an injection molding process, so that the frame structures with different cambered surface structures can be obtained through the design of the cavity structure of the injection mold.
Alternatively, the glass fiber prepreg layers may be provided with a dimension in the length direction that is greater than the dimension of the other fiber prepreg layers in the length direction, wherein the dimension difference is 0.5 to 2mm, alternatively, the dimension difference is 0.5mm, 1mm, 1.5mm, 2mm.
Alternatively, the glass fiber prepreg layer may be provided with a larger dimension in the width direction than the other fiber prepreg layers, wherein the dimensional difference is 0.5 to 2mm, alternatively, the dimensional difference is 0.5mm, 1mm, 1.5mm, 2mm.
Optionally, in the embodiment of the present invention, when a plurality of fiber pre-soaking layers are sequentially stacked to form a laminated sheet, when the number of the fiber pre-soaking layers is more than two, the fiber pre-soaking layers of the upper and lower symmetrical layers in the laminated sheet are made of the same material, for example, when the number of the fiber pre-soaking layers is two, the materials of the two fiber pre-soaking layers are the same; for another example, when the number of the fiber prepreg layers is three, the first layer, the second layer and the third layer are sequentially arranged, wherein the first layer and the third layer are the same material and can be all aramid fiber prepreg layers, and the second layer can be aramid fiber prepreg layers or other fiber prepreg layers, so that the method is similar to the method.
The upper symmetrical layer and the lower symmetrical layer in the laminated sheet are made of the same material, so that the laminated sheet has the same shrinkage rate in hot press molding, and synchronous deformation can be generated, so that the shell matrix obtained by hot press molding is smoother, and the appearance quality of the shell is improved.
Step 305, the housing includes a first surface and a second surface disposed away from each other, and a flame retardant ink layer is applied to at least one of the first surface or the second surface.
Specifically, as shown in fig. 7 and 8, wherein the housing includes a first surface and a second surface facing away from each other, after the housing is obtained, an ink layer 111 is applied on at least one of the first surface or the second surface of the housing. Specifically, a primer layer may be sprayed on the first surface of the case, and then an ink layer 111 may be sprayed on the surface of the primer layer, wherein the materials of the primer layer and the ink layer may be selected according to need, which is not limited in the embodiment of the present invention.
Further, the ink layer 111 is made of a flame-retardant ink material, and can be formed on the surface of the shell by a coating method, or can be formed on the surface of the shell by a spraying method, and the specific method for forming the flame-retardant ink layer can be selected according to the requirement, which is not limited in the embodiment of the application.
It will be appreciated that when the housing is applied to an electronic device, the housing includes two surfaces facing away from each other: a first surface and a second surface, wherein the first surface is a surface facing away from the object of use, and the second surface is a surface facing the object of use; typically, the first surface of the housing is in contact with other electronic devices, and the flame retardant performance of the housing may be enhanced by forming a flame retardant ink layer 111 on the first surface of the housing.
Optionally, as shown in fig. 7 and 8, the method further includes: a paint layer 115 is formed on the second surface of the housing.
Specifically, a primer layer, a middle paint layer and a top paint layer may be sequentially sprayed on the second surface of the shell, where the paint materials selected for the primer layer, the middle paint layer and the top paint layer may be thermosetting paint, or ultraviolet curing paint, and specific paint materials may be selected according to needs, which is not limited in the embodiment of the present invention.
Optionally, after the primer layer and the mid-coat layer are sprayed, the sprayed layer may be polished to increase the flatness of the sprayed layer.
It is understood that the second surface refers to a surface facing the user when the housing is applied to the electronic device, and the aesthetic appearance of the housing can be increased by spraying multiple paint layers on the second surface of the housing.
Optionally, the method further comprises: and processing the shell by using a laser cutting process according to the application scene of the shell so as to obtain a corresponding appearance structure.
In summary, the method for preparing a shell according to the embodiment of the present invention may at least include the following advantages:
In the embodiment of the invention, the preparation method of the shell comprises the following steps: sequentially laminating a plurality of fiber prepreg layers to form a laminated sheet, wherein the laminated sheet comprises a first side and a second side which are arranged in a deviating manner, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers; performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure; the multi-layer fiber prepreg layers at least comprise one glass fiber prepreg layer, and the size of the glass fiber prepreg layer is larger than that of other fiber prepreg layers, so that the edges of the shell matrix are glass fiber prepreg layers; the process of injection molding is adopted to form a frame structure at the outer edge of the periphery of the shell matrix, and the process comprises the following steps: and forming a frame structure on the glass fiber prepreg layer at the peripheral outer edges of the shell matrix by adopting an injection molding process. The laminated sheet at least comprises one glass fiber prepreg layer, the size of the glass fiber prepreg layer is larger than that of other fiber prepregs, the glass fiber prepreg layer is arranged at the peripheral outer edge part of the shell matrix obtained by hot press molding, and the peripheral outer edge of the shell matrix is processed by cutting the glass fiber prepreg layer, so that the precision of the outline size of the shell is improved. Further, a frame structure is formed on the glass fiber prepreg layer by adopting an injection molding process, and burrs generated by cutting are coated on the peripheral outer edges of the shell substrate by the frame structure, so that the problem that burrs exist on the peripheral edges of the obtained shell is avoided, and the frame structures with different arc structures are obtained through the design of the cavity structure of the injection mold, so that the problem that the accuracy of the outline size of the shell is insufficient due to inaccurate cutting is avoided.
Example IV
The embodiment of the invention also provides a shell, which is prepared by the preparation method of the shell.
The housing may include a variety of, for example: cell phone housings, computer housings, wearable device housings, etc.
In summary, the housing according to the embodiment of the present invention may at least include the following advantages:
In the embodiment of the invention, the shell prepared by the preparation method of the embodiment forms the frame structure of the plastic structure at the peripheral outer edge of the shell base body, and the frame structure can cover burrs generated by cutting of the peripheral outer edge of the shell base body, so that the problem of burrs at the peripheral edge of the obtained shell is avoided. And the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, and the frame structures with different arc structures can be obtained through the design of the cavity structure of the injection mold, so that the problem of insufficient accuracy of the outline size of the shell due to inaccurate cutting is avoided, and the accuracy of the size of the outline outside the shell is convenient to improve.
Example five
The embodiment of the invention also provides electronic equipment, which comprises the shell of the embodiment.
The electronic device provided by the embodiment of the invention comprises, but is not limited to: a cell phone, tablet computer, digital broadcast electronics, messaging electronics, game console, medical device, personal digital assistant, smart wearable device, smart television, etc.
In summary, the electronic device according to the embodiment of the present invention may at least include the following advantages:
In the embodiment of the invention, the electronic equipment comprises the shell of the embodiment, and the shell prepared by adopting the preparation method has the advantages that the frame structure of the plastic structure is formed at the peripheral outer edge of the shell base body, and the frame structure can cover burrs generated by cutting the peripheral outer edge of the shell base body, so that the problem of burrs at the peripheral edge of the obtained shell is avoided. And the shape of the outer surface of the frame structure is determined by the cavity of the injection mold, and the frame structures with different arc structures can be obtained through the design of the cavity structure of the injection mold, so that the problem of insufficient accuracy of the outline size of the shell due to inaccurate cutting is avoided, and the accuracy of the size of the outline outside the shell is convenient to improve.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are mutually referred to.
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.
The above description of the preparation method of the shell, the shell and the electronic equipment provided by the invention applies specific examples to illustrate the principle and the implementation of the invention, and the above examples are only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. A method of manufacturing a housing, comprising:
Sequentially laminating a plurality of fiber prepreg layers to form a laminated sheet, wherein the laminated sheet comprises a first side and a second side which are arranged in a deviating manner, and the fiber prepreg layers of at least one side are aramid fiber prepreg layers;
performing hot press molding on the laminated sheet to obtain a shell substrate with at least one side edge having an arc-shaped structure;
Forming a frame structure on the peripheral outer edges of the shell matrix by adopting an injection molding process to obtain a shell; wherein the frame structure is a plastic structure;
wherein the multi-layer fiber prepreg layer at least comprises one glass fiber prepreg layer; the glass fiber prepreg layers have a size greater than the other fiber prepreg layers so that the shell substrate edges are glass fiber prepregs.
2. The method of claim 1, wherein the injection molding process is used to form a rim structure on the peripheral outer edge of the shell substrate, the method further comprising:
Processing the peripheral outer edges of the shell matrix by adopting a laser cutting process to obtain a first shell matrix;
The process of injection molding is adopted to form a frame structure at the outer edge of the periphery of the shell matrix, and the process comprises the following steps:
And forming a frame structure on the peripheral outer edges of the first shell matrix by adopting an injection molding process.
3. The method of claim 2, wherein the processing the peripheral outer edge of the shell substrate using a laser cutting process to obtain a first shell substrate comprises:
Processing the peripheral outer edges of the shell matrix by adopting a laser cutting process to obtain an initial shell matrix;
Forming an encapsulation groove at the outer edge of the initial shell body by adopting a laser cutting process to obtain a first shell body, wherein the encapsulation groove extends from the edge of the first shell body to the side of the first shell body away from the edge.
4. The method of claim 1, wherein the forming a rim structure on the peripheral outer edge of the shell substrate using an injection molding process comprises:
Coating an adhesive layer on the peripheral outer edges of the shell matrix;
And forming a frame structure on the adhesive layer of the shell matrix by adopting an injection molding process.
5. The method of claim 1, wherein the material of the bezel structure is a flame retardant fiber reinforced resin material.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The process of injection molding is adopted to form a frame structure at the outer edge of the periphery of the shell matrix, and the process comprises the following steps:
and forming a frame structure on the glass fiber prepreg layer at the peripheral outer edges of the shell matrix by adopting an injection molding process.
7. The method of claim 6, wherein the injection molding process includes, prior to forming the frame structure on the fiberglass prepreg layer at the peripheral outer edge of the shell substrate:
Processing the glass fiber prepreg layer at the peripheral outer edge of the shell matrix by adopting a laser cutting process to obtain a second shell matrix;
the process of injection molding is adopted to form a frame structure at the peripheral outer edge of the shell matrix, and the process comprises the following steps:
And forming a frame structure on the peripheral outer edges of the second shell matrix by adopting an injection molding process.
8. The method of claim 1, wherein the housing includes a first surface and a second surface disposed away from each other, the method further comprising:
A flame retardant ink layer is applied to at least one of the first surface or the second surface.
9. A housing prepared by the method of any one of claims 1-8.
10. An electronic device comprising the housing of claim 9.
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