CN112799230A - Shell preparation method, shell and head-mounted display device - Google Patents
Shell preparation method, shell and head-mounted display device Download PDFInfo
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- CN112799230A CN112799230A CN202011417790.5A CN202011417790A CN112799230A CN 112799230 A CN112799230 A CN 112799230A CN 202011417790 A CN202011417790 A CN 202011417790A CN 112799230 A CN112799230 A CN 112799230A
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- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000003292 glue Substances 0.000 claims abstract description 15
- 238000009745 resin transfer moulding Methods 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 139
- 239000004745 nonwoven fabric Substances 0.000 claims description 57
- 239000006260 foam Substances 0.000 claims description 45
- 239000000835 fiber Substances 0.000 claims description 33
- 239000012790 adhesive layer Substances 0.000 claims description 29
- 239000002759 woven fabric Substances 0.000 claims description 24
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 16
- 239000004917 carbon fiber Substances 0.000 claims description 16
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- 230000002457 bidirectional effect Effects 0.000 claims description 10
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0176—Head mounted characterised by mechanical features
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Casings For Electric Apparatus (AREA)
- Laminated Bodies (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The application discloses a shell preparation method, a shell and a head-mounted display device, wherein the shell preparation method comprises the following steps: preparing a preform comprising a woven cloth layer, wherein the preform has a density of 0.5 to 0.6g/cm3In the range, the green body has a tensile modulus of greater than 2 GPa; placing the blank into a predetermined mold; injecting resin glue solution into the preset mould; and (3) adopting any one of a VARI process, an RTM process, an HP-RTM process and a GMT process to solidify and mold, and then demoulding to form the shell. The embodiment of the application adopts any one of the VARI process, the RTM process, the HP-RTM process and the GMT process for the first time to prepare the shell applied to the consumer electronics product, and the lightweight shell can be provided.
Description
Technical Field
The application belongs to the technical field of head-mounted display, and particularly relates to a shell preparation method, a shell and head-mounted display equipment.
Background
With the development of electronic products, head-mounted display devices such as virtual reality head-mounted devices, augmented reality head-mounted devices, mixed reality head-mounted devices and the like have increasingly appeared in real life.
Wear display device and constantly expand to consumer-grade market, for promoting ordinary consumer's wearing experience, wear display device and constantly improve to miniaturization, lightweight direction.
The housing of the head-mounted display device is usually made of Polychloroprene (PC), Polyamide (PA), Polypropylene (PP), Acrylonitrile Butadiene Styrene (ABS), and the like. The housing of the head-mounted display device made of these materials is generally heavy, and cannot meet the requirements of miniaturization and light weight of the head-mounted display device.
Content of application
The technical problem that this application will solve is: a shell preparation method, a shell and a head-mounted display device are provided to meet the development requirements of miniaturization and light weight of the head-mounted display device.
In order to solve the technical problem, the technical scheme of the application is as follows:
some embodiments of the present application provide a method of making a housing, the method comprising:
preparing a preform comprising a woven cloth layer, the preform having a density of from 0.5 to 0.6g/cm3In the range, the green body has a tensile modulus of greater than 2 GPa;
placing the blank into a predetermined mold;
injecting resin glue solution into the preset mould;
and (3) adopting any one of a VARI process, an RTM process, an HP-RTM process and a GMT process to solidify and mold, and then demoulding to form the shell.
Optionally, the blank further comprises a first non-woven fabric layer, the first non-woven fabric layer is made of polyester fibers, and the thickness of the first non-woven fabric layer is 0.03-0.1 mm.
Optionally, the blank further comprises a foam layer, the foam layer is located between the first non-woven fabric layer and the woven fabric layer, and the foam layer comprises one or more of PI foam, PEI foam, PET foam and TPU foam.
Optionally, the blank further comprises a first layer of double-sided glue, a second layer of double-sided glue, and a second layer of non-woven fabric, wherein,
the first double-sided adhesive layer is positioned between the first non-woven fabric layer and the woven layer;
the second double-sided adhesive layer is positioned on one side of the woven layer far away from the first double-sided adhesive layer;
the second non-woven fabric layer is located on one side, far away from the woven layer, of the second double-sided adhesive layer.
Optionally, the woven fabric layer comprises bidirectional carbon fibers, and the thickness of the woven fabric layer is 0.03-0.5 mm.
In other embodiments of the present application, a housing prepared by the method of any one of the embodiments of the present application includes a woven fabric layer, an outer surface of the housing is coated with resin, and the density of the housing is 0.8-1.0g/cm3Within the range.
Optionally, the shell further comprises a first non-woven fabric layer, the first non-woven fabric layer comprises polyester fibers, and the thickness of the first non-woven fabric layer is 0.03-0.1 mm.
Optionally, the shell further comprises a foam layer, the foam layer is located between the first non-woven fabric layer and the woven fabric layer, and the foam layer comprises one or more of PI foam, PEI foam, PET foam, and TPU foam.
Optionally, the housing further comprises a first double-sided adhesive layer, a second double-sided adhesive layer and a second non-woven fabric layer, wherein,
the first double-sided adhesive layer is positioned between the first non-woven fabric layer and the woven layer;
the second double-sided adhesive layer is positioned on one side of the woven layer far away from the first double-sided adhesive layer;
the second non-woven fabric layer is located on one side, far away from the woven layer, of the second double-sided adhesive layer.
Optionally, the woven fabric layer comprises bidirectional carbon fibers, and the thickness of the woven fabric layer is 0.03-0.5 mm.
Still other embodiments of the present application provide a head-mounted display device, where a housing of the head-mounted display device is the housing provided in any of the embodiments of the present application.
According to the shell preparation method provided by some embodiments of the application, the blank including the woven fabric layer is placed into a preset mold, the resin glue solution is injected into the preset mold, and then the shell is formed by demolding after curing and molding by adopting any one of the VARI process, the RTM process, the HP-RTM process and the GMT process. The shell applied to the consumer electronics is prepared by adopting any one of the VARI process, the RTM process, the HP-RTM process and the GMT process for the first time, and the lightweight shell can be provided.
Drawings
FIG. 1 is a schematic flow diagram of a method of making a housing provided in some embodiments of the present application;
FIG. 2 is a schematic structural view of a housing provided in some embodiments of the present application;
FIG. 3 is a schematic structural diagram of a housing provided in accordance with further embodiments of the present application;
FIG. 4 is a schematic structural view of a housing provided in accordance with further embodiments of the present application;
FIG. 5 is a schematic structural view of a housing provided in accordance with further embodiments of the present application;
fig. 6 is a schematic structural diagram of a housing according to further embodiments of the present application.
Detailed Description
The present application is further described below with reference to the drawings and examples.
All directions referred to in the present specification are based on the drawings, and represent relative positional relationships only, and do not represent absolute positional relationships.
As shown in fig. 1, some embodiments of the present application provide a method of manufacturing a casing, which may include the steps of:
step S11: preparing a blank which is of a layer-spreading structure (namely a multilayer structure), wherein the blank can comprise a woven fabric layer which can comprise bidirectional carbon fibers, for example, bidirectional carbon fiber ultra-thin prepreg can be adopted, and the thickness of the woven fabric layer can be 0.03-0.5 mm.
In the preparation process, a dry-method or wet-method prepreg preparation process is adopted, and the bidirectional carbon fibers are sequentially subjected to fiber unfolding, gum dipping and the like to prepare the bidirectional carbon fiber ultrathin prepreg with a certain thickness. The prepreg liquid adhesive may be thermosetting resin such as epoxy or polyester thermoplastic resin.
The density of the blank of the layer structure is 0.5-0.6g/cm3In this range, the tensile modulus of the preform lay-up (i.e. the multilayer structure of the preform) is greater than 2 GPa.
Step S12: placing the preform into a predetermined mold.
In some embodiments, in order to provide a miniaturized and lightweight head-mounted display device, the shell of the head-mounted display device can be prepared by the shell preparation method provided in the embodiments of the present application, and at this time, a predetermined mold can be made according to the structure and size of a specific head-mounted display device, and a blank can be placed in the predetermined mold.
Step S13: a resin cement is injected into a predetermined mold.
In some embodiments, the resin cement is injected on the outer surface of the predetermined mold, for example, surface 21 and surface 22 in fig. 2. After the injection was completed, a resin cement was filled between the green compact and the inner surface of the predetermined mold.
Step S14: and (3) adopting any one of a VARI process, an RTM process, an HP-RTM process and a GMT process to solidify and mold, and then demoulding to form the shell.
After solidification and forming, the resin glue solution is coated on the two opposite surfaces of the shell to form protection on the surface of the shell.
According to the shell preparation method provided by the embodiment of the application, the blank comprising the woven cloth layer is placed into a preset mold, the resin glue solution is injected into the preset mold, and then the shell is formed by demolding after curing and molding by adopting any one of the VARI process, the RTM process, the HP-RTM process and the GMT process. The shell applied to the consumer electronics is prepared by adopting any one of the VARI process, the RTM process, the HP-RTM process and the GMT process for the first time, and the lightweight shell can be provided.
In the embodiment of the application, the shell is prepared by any one of a Vacuum Assisted Resin Injection (VARI) process, a Resin Transfer Molding (RTM) process, a high-pressure Resin Transfer Molding (HP-RTM) process and a Glass fiber (GMT) process, and a double-sided smooth surface can be provided for a component without a gel coat; the manufactured shell has high surface quality, good finish and high dimensional precision; the required operation space is small, the utilization rate of raw materials is high, and the basic investment and the production cost are low; the flexibility of mould manufacture and material selection is strong; volatile substances emitted in the forming process are few, and the method is favorable for human health and environmental protection. Compared with an injection molding process, the process is suitable for preparing the sandwich structure material, and is high in forming efficiency and low in cost.
In addition, the shell prepared by the bidirectional carbon fiber material has excellent mechanical property, wear resistance, impact resistance, chemical resistance, high temperature resistance and the like; meanwhile, the shell has fiber grains on the surface, is simple and attractive, and does not need to be wrapped with cloth.
The fiber has excellent mechanical properties (usually used as a reinforcement of a matrix material, the carbon fiber has excellent mechanical properties, chemical resistance, high temperature resistance and the like), and the bidirectional woven carbon fiber exerts mechanical advantages in all directions, has excellent mechanical properties, is wear-resistant and impact-resistant, and is extremely difficult to damage.
In the embodiment of the application, the blank can also comprise a first non-woven fabric layer, the first non-woven fabric layer can adopt polyester fibers, and the thickness of the first non-woven fabric layer is 0.03-0.1 mm.
Specifically, the first nonwoven fabric layer may be made of inorganic metal fibers such as carbon fibers, glass fibers, basalt fibers, metal fibers, and boron fibers, aramid fibers, thermoplastic fibers such as PEI fibers and polyester fibers, or the like. The length of the fiber for nonwoven fabric may be 3 to 9mm, and continuous long fiber may be selected.
Can design according to the different fibre kind of performance demand selection of difference, carbon fiber, reinforcing fiber such as glass fiber (as the reinforcement, intensity is high, the modulus is high, can promote casing intensity, reinforcing shell modulus, non-deformable, soft inadequately, improvement effect to the outward appearance is not like polyester fiber, the cost is higher), polyester fiber is thermoplastic fiber (softer, mainly improve the outward appearance, promote the resin flow, the toughness of casing can greatly be strengthened to the entanglement force between the fibre, promote shock resistance, arrange in the skin usually, it is with low costs), it is single kind fibre to select the hybrid fiber according to design and concrete key performance demand design.
The polyester non-woven fabric has gaps, so that the resin can be promoted to flow, the polyester non-woven fabric is easy to bond with the resin, the apparent performance of the shell can be improved, and the impact strength can be enhanced.
In other embodiments, the blank may further comprise a foam layer comprising one or more of PI foam, PEI foam, PET foam, TPU foam, the density of the material in the foam layer being 0.5g/cm3The following. The shell is made of foam materials, so that the overall weight of the shell can be further reduced, and meanwhile, the impact toughness can be enhanced.
The foam in the foam layer is low in density and can serve as a weight-reducing main body to play a supporting role, and meanwhile, foam holes in the foam can greatly absorb impact potential energy and reduce damage of impact to the shell.
In some embodiments, the blank may further comprise a first layer of double-sided glue, a second layer of double-sided glue, and a second layer of non-woven fabric, wherein the first layer of double-sided glue is between the first layer of non-woven fabric and the woven layer; the second double-sided adhesive layer is positioned on one side of the woven layer far away from the first double-sided adhesive layer; the second non-woven fabric layer is located on one side, far away from the woven layer, of the second double-sided adhesive layer.
Specifically, the first double-sided adhesive layer and the second double-sided adhesive layer may be epoxy adhesive films. The second nonwoven fabric layer may be made of the same material as the first nonwoven fabric layer.
The adhesive layer is used for solidifying and bonding the layers (such as the first non-woven fabric layer, the second non-woven fabric layer, the woven layer and the like) into a whole, the adhesive effect is only realized, and the thickness of the adhesive layer can be 6-10 mu m.
The first nonwoven fabric layer and the second nonwoven fabric layer are located outside and can improve appearance, reduce internal defects (promote resin flow, reduce defects such as voids, etc.), and improve impact performance.
Some embodiments of the present application further provide a shell, which is prepared by the shell preparation method according to the above embodiments of the present application, and as shown in fig. 3, the shell includes a woven fabric layer 31. Since the resin cement is injected into a predetermined mold during the case preparation process, both outer sides of the fabric layer 31 are coated with the resins 32 and 33. Wherein the shell has a density of 0.8-1g/cm3Within the range.
In some embodiments, the woven fabric layer 31 is made of a bi-directional carbon fiber material, and the thickness of the woven fabric layer 31 is 0.03-0.5 mm.
The shell prepared by the bidirectional carbon fiber material has excellent mechanical property, and is wear-resistant, impact-resistant, chemical-resistant, high-temperature-resistant and the like; meanwhile, the shell has fiber grains on the surface, is simple and attractive, and does not need to be wrapped with cloth.
As shown in fig. 4, other embodiments of the present application may further include a first nonwoven fabric layer 34, the first nonwoven fabric layer 34 includes polyester fibers, and the thickness of the first nonwoven fabric layer 34 is 0.03-0.1 mm. Since the resin cement is injected into a predetermined mold during the case preparation process, both outer sides of the first nonwoven fabric layer 34 and the woven fabric layer 31 are coated with the resins 32 and 33.
Specifically, the first nonwoven fabric layer 34 may be made of inorganic metal fibers such as carbon fibers, glass fibers, basalt fibers, metal fibers, and boron fibers, aramid fibers, thermoplastic fibers such as PEI fibers and polyester fibers, or the like. The length of the fiber for nonwoven fabric may be 3 to 9mm, and continuous long fiber may be selected.
The polyester non-woven fabric has gaps, so that the resin can be promoted to flow, the polyester non-woven fabric is easy to bond with the resin, the apparent performance of the shell can be improved, and the impact strength can be enhanced.
When the housing shown in fig. 4 is applied to an electronic device, the first nonwoven fabric layer 34 may be disposed on an outer surface of the housing of the electronic device, and the woven fabric layer 31 may be disposed on an inner surface of the housing of the electronic device.
As shown in fig. 5, some embodiments of the present application provide another shell, which is different from the shell in fig. 4, the shell further includes a foam layer 35, the foam layer 35 is located between the first non-woven fabric layer 34 and the woven fabric layer 31, and the foam layer 35 includes one or more of PI foam, PEI foam, PET foam, and TPU foam. Since the resin cement is injected into a predetermined mold during the case preparation process, both outer sides of the first nonwoven fabric layer 34, the foam layer 35, and the woven fabric layer 31 are coated with the resin.
When the housing shown in fig. 5 is applied to an electronic device, the first nonwoven fabric layer 34 may be disposed on an outer surface of the housing of the electronic device, and the knitted fabric layer 31 may be disposed on an inner surface of the housing of the electronic device.
Unlike the casing shown in fig. 4, the casing provided in some embodiments of the present application may further include a first double-sided tape layer 36, a second double-sided tape layer 37, and a second nonwoven fabric layer 38, as shown in fig. 6, where the first double-sided tape layer 36 is located between the first nonwoven fabric layer 34 and the woven layer 34; the second double-sided adhesive layer 37 is positioned on the side of the braided layer 31 away from the first double-sided adhesive layer 36; a second nonwoven layer 38 is located on the side of the second layer of double sided adhesive 37 remote from the knit layer 31.
Specifically, the second nonwoven fabric layer 38 may be made of the same material as the first nonwoven fabric layer 38. The first double-sided adhesive layer 36 and the second double-sided adhesive layer 37 may be double-sided adhesive tape or epoxy-based adhesive film.
When the housing shown in fig. 6 is applied to an electronic device, the first nonwoven fabric layer 34 may be disposed on an outer surface of the housing of the electronic device, and the second nonwoven fabric layer 38 may be disposed on an inner surface of the housing of the electronic device; alternatively, the first nonwoven fabric layer 34 may be disposed on the inner surface of the electronic device case, and the second nonwoven fabric layer 38 may be disposed on the outer surface of the electronic device case.
Some embodiments of the present application further provide a head-mounted display device, which may use the housing provided in any of the above embodiments as a housing.
The head-mounted display device may specifically be a virtual reality head-mounted display device, an augmented reality head-mounted display device, or a mixed reality head-mounted display device. The head-mounted display device can also be a glasses product, a helmet product and a head-mounted box product.
The shell of the head-mounted display equipment adopts the shell provided by any one of the embodiments, so that the whole weight of the head-mounted display equipment is favorably reduced, the head of a user cannot be stressed due to long-time wearing, and the wearing comfort of the user is favorably improved. Meanwhile, the shell prepared by adopting any one of the VARI process, the RTM process, the HP-RTM process and the GMT process has smooth and neat appearance and excellent mechanical property, and can be suitable for the whole shell of high-end head-mounted display equipment.
While specific embodiments of the present application have been described above, it will be understood by those skilled in the art that the described embodiments are only a few, and not all, embodiments of the present application, which are intended to be illustrative, and the scope of the present application is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without any inventive effort, but these changes and modifications are within the scope of the present application.
Claims (11)
1. A method of making a housing, the method comprising:
preparing a preform comprising a woven cloth layer, the preform having a density of from 0.5 to 0.6g/cm3In the range, the green body has a tensile modulus of greater than 2 GPa;
placing the blank into a predetermined mold;
injecting resin glue solution into the preset mould;
and (3) adopting any one of a VARI process, an RTM process, an HP-RTM process and a GMT process to solidify and mold, and then demoulding to form the shell.
2. The method of claim 1, wherein the preform further comprises a first nonwoven layer, the first nonwoven layer is made of polyester fibers, and the first nonwoven layer has a thickness of 0.03 to 0.1 mm.
3. The method of claim 2, wherein the blank further comprises a foam layer, the foam layer is positioned between the first non-woven fabric layer and the woven fabric layer, and the foam layer comprises one or more of PI foam, PEI foam, PET foam, TPU foam.
4. The method of making as set forth in claim 2 wherein the blank further comprises a first layer of two-sided glue, a second layer of two-sided glue, and a second layer of non-woven fabric, wherein,
the first double-sided adhesive layer is positioned between the first non-woven fabric layer and the woven layer;
the second double-sided adhesive layer is positioned on one side of the woven layer far away from the first double-sided adhesive layer;
the second non-woven fabric layer is located on one side, far away from the woven layer, of the second double-sided adhesive layer.
5. The production method according to any one of claims 1 to 4, wherein the woven fabric layer comprises a bidirectional carbon fiber, and the thickness of the woven fabric layer is 0.03 to 0.5 mm.
6. A shell, which is prepared by the shell preparation method of any one of claims 1 to 5, and comprises a woven fabric layer, wherein the outer surface of the shell is coated with resin, and the density of the shell is 0.8 to 1.0g/cm3Within the range.
7. The housing of claim 6, further comprising a first nonwoven layer comprising polyester fibers, the first nonwoven layer having a thickness of 0.03-0.1 mm.
8. The shell of claim 7, further comprising a foam layer between the first nonwoven layer and the woven fabric layer, the foam layer comprising one or more of PI foam, PEI foam, PET foam, TPU foam.
9. The case of claim 7, further comprising a first layer of two-sided glue, a second layer of two-sided glue, and a second layer of non-woven fabric, wherein,
the first double-sided adhesive layer is positioned between the first non-woven fabric layer and the woven layer;
the second double-sided adhesive layer is positioned on one side of the woven layer far away from the first double-sided adhesive layer;
the second non-woven fabric layer is located on one side, far away from the woven layer, of the second double-sided adhesive layer.
10. The shell according to any one of claims 6 to 9, wherein the woven fabric layer comprises bi-directional carbon fibers, the woven fabric layer having a thickness of 0.03 to 0.5 mm.
11. A head-mounted display device, characterized in that the housing of the head-mounted display device adopts the casing of any one of claims 6 to 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2020110551970 | 2020-09-30 | ||
| CN202011055197 | 2020-09-30 |
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| CN112799230A true CN112799230A (en) | 2021-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113370607A (en) * | 2021-05-31 | 2021-09-10 | 潍坊歌尔电子有限公司 | Intelligent wearable equipment shell and manufacturing method thereof |
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