CN103929915A - Waterproof metal outer shell of electronic product and manufacturing method thereof - Google Patents
Waterproof metal outer shell of electronic product and manufacturing method thereof Download PDFInfo
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- CN103929915A CN103929915A CN201410132407.XA CN201410132407A CN103929915A CN 103929915 A CN103929915 A CN 103929915A CN 201410132407 A CN201410132407 A CN 201410132407A CN 103929915 A CN103929915 A CN 103929915A
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- waterproof
- metal
- silica gel
- sealing boss
- metal shell
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Abstract
The invention discloses a waterproof metal outer shell of an electronic product and a manufacturing method of the waterproof metal outer shell. According to the manufacturing method, a metal shell provided with a protrusive waterproof rib on the inner surface is formed, and the positions, spaced by a preset distance, on the two sides of the waterproof rib respectively protrude upwards to form a sealant boss; a mold is directly pressed on the sealant bosses, so that the sealant bosses deform, at least a part of each sealant boss is pressed in a containing groove, then a closed cavity is formed by the mold and the metal shell through the sealant bosses, then silica gel is injected to the cavity, the mold is opened after the silica gel is heated and vulcanized, a waterproof silica gel part integrated with the metal shell is formed on the waterproof rib, and the side surface or the top of the waterproof silica gel part is provided with a protrusive part. According to the waterproof metal outer shell, due to the design of the sealant bosses, when the waterproof metal outer shell is manufactured, silica gel overflowing and scratches on the surface of the metal product are not prone to occurring in the injection molding process, and compression or damage to the mold is also avoided.
Description
Technical field
The present invention relates to electronic product casing, relate in particular to a kind of metal waterproof case and manufacture method thereof of electronic product.
Background technology
Increasing 3C Product (computer (Computer), communication (Communication) and consumer electronics product (ConsumerElectronics) triplicity, also claim " information household appliances "), particularly smart mobile phone product, all requires to have functions of waterproof and dustproof.
Traditional waterproof type is in plastic shell, to install silica gel ring, after assembling, reaches water-proof function by assembly parts, the classification of waterproof of this kind of mode is limited, generally in about IPX5, and dismounting ressembles rear water resistance and easily changes, and is generally used in the less or structure do not dismantled of dismounting.
Popular a kind of way is to adopt plastic cement to add one-body molded mode in liquid-state silicon gel mould now, plastic parts and silica gel straight forming are as a whole, by realizing waterproof with the interference assembling of component, classification of waterproof is higher, can realize waterproof effect more than IPX7 level, and can again dismantle assembling, not affect water resistance.But adopt this kind of mode, design, the making required precision of mould are higher, have certain technical difficulty; On the other hand, along with the aestheticly tired of people to plastic parts, 3C Product is also proposed to the requirement of more and more higher outward appearance, structure and performance.So, use metalwork also more and more as the product of surface structure part, and it is existing by as a whole to reach the mould-injection process of waterproof effect to plastic parts and silica gel injection mo(u)lding, the waterproof construction that is not suitable for metalwork is made, can produce in mould and weigh wounded, damage product, mould, in addition, glue easily overflows in the time of injection moulding.
Summary of the invention
One of them object of the present invention is to provide a kind of metal waterproof case of electronic product, to solve metal waterproof case in manufacturing process, in overflow glue and mould, weighs the technical problem that causes mould, damaged products wounded while adopting in-mould injection moulding process.
Technical scheme provided by the invention is as follows:
A kind of metal waterproof case of electronic product, comprise metal shell and silica gel waterproof portion, described metal shell comprises the waterproof position of bone that protrudes from inner surface, described metal shell inner surface raises up respectively in the position of the interval, both sides of described waterproof position of bone preset distance and forms sealing boss, and the inner surface of the described metal shell of at least one side of described sealing boss is recessed to form containing groove; Described silica gel waterproof portion takes shape on the described waterproof position of bone by in-mould injection; Side surface or the top of described silica gel waterproof portion have protuberance, to realize and the interference assembling of described electronic product assembly parts.Based on sealing boss, moulding in film is formed in the process of silica gel waterproof portion, when matched moulds, first mould contacts with sealing boss, sealing boss compressive deformation, play the effect of sealing die cavity, avoid excessive glue, simultaneously, because mould directly applies pressure to sealing boss, and containing groove can provide deformation space for sealing boss, after being squeezed, sealing boss can enter at least partly containing groove, can further reduce so the suffered pressure of sealing boss and pass to metal shell, so the pressure being applied on metal shell alleviates greatly, can effectively avoid between mould and metal shell because pressure is compared with the mould causing greatly and/or metal shell damage.
Preferably, the material of described metal shell is metallic aluminium, magnesium metal, metallic copper, aluminium alloy, magnesium alloy or copper alloy.
Preferably, the width of described sealing boss is 0.05～1mm, is highly 0.05～0.2mm, and the width 0.05～1mm of described containing groove, the degree of depth are 0.05～0.2mm.
Preferably, the volume of described containing groove is more than or equal to the volume of described sealing boss.The volume of containing groove is more than or equal to the volume of sealing boss, is all can enter into containing groove for the part that sealing boss is extruded distortion.
Preferably, the material of described silica gel waterproof portion is bi-component liquid-state silicon gel.
Preferably, the material of described silica gel waterproof portion is self-adhering-type liquid-state silicon gel.
Preferably, at least one side angle of falling C or the fillet of described sealing boss.
Preferably, the C angle of described sealing boss or fillet are positioned at the side of described sealing boss away from containing groove.Based on this angle of falling C or fillet, sealing boss is the more easily opposite side distortion to chamfering in the time being squeezed, thereby crushed element is more prone to enter in containing groove, in die cavity sealing, can further reduce the stressed of metal shell.
Metal waterproof case provided by the invention, due to the design of shell inner surface sealing boss, makes in manufacturing process, can not cause in mould and weigh wounded, there will not be excessive glue, and the outward appearance of this kind of metal waterproof case, feel and heat dispersion is all better than plastic shell.
Another object of the present invention is to provide a kind of method of manufacturing aforementioned electronic resultant metal waterproof case, can cause product surface to weigh wounded and the overflow problem of glue of silica gel to solve the Shooting Technique of existing manufacture metalwork waterproof part.
Manufacture method provided by the invention comprises:
S1, formation metal shell: described metal shell comprises the waterproof position of bone that protrudes from inner surface, described metal shell inner surface raises up respectively in the position of the interval, both sides of described waterproof position of bone preset distance and forms sealing boss, and the inner surface of the described metal shell of at least one side of described sealing boss is recessed to form containing groove;
S2, in-mould injection moulding: when matched moulds, mould is pressed on described sealing boss, at least a portion of described sealing boss generation deformation and sealing boss is pressed in described containing groove, thereby make mould and described metal shell form near closed hollow ring by described sealing boss, again to described die cavity injection silica gel, die sinking after baking forms and the silica gel waterproof portion of described metal shell one on the waterproof position of bone, and side surface or the top of described silica gel waterproof portion have protuberance.
Preferably, in described step S1, form described metal shell by punching press or CNC processing or die casting mode.
The method of manufacture aforementioned metal waterproof case provided by the invention, in the time making metal shell, metal shell inner surface is protruded and form sealing boss, in the time carrying out injection mo(u)lding with formation silica gel waterproof portion, mould directly applies pressure to sealing boss and non-metal shell on the one hand, can be out of shape because sealing boss is subject to mould extruding, therefore form the die cavity of sealing, glue can not overflow when injection silica gel; On the other hand, because containing groove can provide deformation space for sealing boss, after being squeezed, sealing boss can enter at least partly containing groove, the suffered pressure that can further reduce like this sealing boss passes to metal shell, therefore the pressure being applied on metal shell alleviates greatly, thereby avoids between mould and metal shell because pressure is compared with the mould and/or the shell damage that cause greatly.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of mobile phone metal waterproof case of providing of the embodiment of the present invention;
Fig. 2 is that the metal waterproof case of Fig. 1 is along cutaway view and the partial enlarged drawing of A-A ' line;
Fig. 3 is that the matched moulds of the silica gel waterproof portion in injection mo(u)lding Fig. 1 starts schematic diagram;
Sealing boss compressive deformation schematic diagram when Fig. 4 is the matched moulds of the silica gel waterproof portion in injection mo(u)lding Fig. 1;
Fig. 5 injects the schematic diagram after silica gel after matched moulds in Fig. 4;
Fig. 6 is the metal waterproof case of Fig. 1 and the schematic diagram of mobile phone assembly parts interference assembling.
Embodiment
Preferred embodiment the invention will be further described to contrast accompanying drawing combination below.
The specific embodiment of the present invention provides a kind of metal waterproof case of mobile phone as shown in Figure 1, and it comprises metal shell 10 and silica gel waterproof portion 20.As shown in Figure 2, described metal shell 10 comprises the waterproof position of bone 11 that protrudes from its inner surface, described metal shell 10 inner surfaces raise up respectively in the position of the interval, both sides of the described waterproof position of bone 11 preset distance and form sealing boss 30, and the inner surface of the described metal shell 10 of at least one side of described sealing boss 30 is recessed to form containing groove 40; Described silica gel waterproof portion 20 takes shape on the described waterproof position of bone 11 by in-mould injection, and the side surface of described silica gel waterproof portion 20 has protuberance, as shown in Figure 6, assemble to realize with the interference of mobile phone assembly parts 200, wherein said protuberance also can be according to assembling needs, be at the top of described silica gel waterproof portion 20, and to be not limited to be at side surface.As shown in Fig. 3 to 5, based on described sealing boss 30, described in injection mo(u)lding when silica gel waterproof portion 20 mould 100 directly press on described sealing boss 30, and directly do not apply pressure to described metal shell 10.
Make metal waterproof case as shown in Figure 1, first: pass through CNC, (CNC cost is higher for the mode of die casting or punching press, preferably both) form metal shell 10, and these metal shell 10 inner surfaces are (after having assembled with mobile phone assembly parts, the sightless side) convex to form the waterproof position of bone 11, at the position of the pre-spacing in the interval, both sides of the waterproof position of bone 11 epirelief formation sealing boss 30 respectively, preferably, beyond the edge of silica gel waterproof portion to be formed, to form this sealing boss 30, simultaneously, in the one-sided or both sides of sealing boss 30, metal shell 10 inner surfaces are recessed to form containing groove 40, see Fig. 2,
Secondly, carry out in-mould injection and form described silica gel waterproof portion 20: as shown in Figure 3, mould 100 directly presses on described sealing boss 30; While completing matched moulds as shown in Figure 4, described sealing boss 30 is squeezed to distortion by mould 100, and the part that is extruded distortion enters in described containing groove 40, now between mould 100 and metal shell 10, form the die cavity of sealing by sealing boss 30, toward die cavity injection liquid silica gel, gel coated is in the outside of the waterproof position of bone 11 again.In this process, be not prone to excessive glue, and mould 100 directly exerts pressure is sealing boss 30, avoided between mould and metal shell because weighing wounded in the mould causing compared with large pressure, mould and/or metal shell damage, see Fig. 5.Until silica gel after sulfidization molding in die cavity, die sinking ejects, obtain silica gel waterproof portion 20 as shown in Figure 2, the side surface of this silica gel waterproof portion 20 or top (specifically making according to different assemblings) have protuberance, make described metal waterproof case in the time assembling with mobile phone assembly parts by this protuberance, realize interference as shown in Figure 6 assembling, reach and effectively prevent that extraneous water etc. from entering interior of mobile phone.
Wherein metal shell 10 can be selected flexible metal, such as metallic aluminium, magnesium metal, metallic copper, aluminium alloy, magnesium alloy or copper alloy etc., and the material of silica gel waterproof portion 20 can be selected bi-component liquid-state silicon gel, preferably adopts self-adhering-type liquid-state silicon gel.
In actual fabrication, can as required, sealing boss 30 is designed to wide 0.05～1mm, high 0.05～0.2mm, and containing groove 40 be designed to wide 0.05～1mm, dark 0.05～0.2mm, and preferably the volume of containing groove is not less than the volume of sealing boss.Attention: " wide " described herein refers to the width on the section in Fig. 2.Separately, one-sided or the both sides of sealing boss 30 can chamfering, the angle of falling C or fillet, and chamfering is positioned at the side away from containing groove on sealing boss, based on this angle of falling C or fillet, sealing boss is the more easily opposite side distortion to chamfering in the time being squeezed, thereby crushed element is more prone to enter in containing groove, in die cavity sealing, can further reduce the stressed of metal shell.
The mobile phone metal waterproof case that the specific embodiment of the invention provides, due to the design of shell inner surface sealing boss, make in manufacturing process, be difficult for causing product to weigh wounded and the glue that overflows, and the outward appearance of this kind of metal waterproof case, feel and heat dispersion are all better than plastic shell.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some being equal to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the metal waterproof case of an electronic product, it is characterized in that: comprise metal shell and silica gel waterproof portion, described metal shell comprises the waterproof position of bone that protrudes from inner surface, described metal shell inner surface raises up respectively in the position of the interval, both sides of described waterproof position of bone preset distance and forms sealing boss, and the inner surface of the described metal shell of at least one side of described sealing boss is recessed to form containing groove; Described silica gel waterproof portion takes shape on the described waterproof position of bone by in-mould injection; Side surface or the top of described silica gel waterproof portion have protuberance, to realize and the interference assembling of described electronic product assembly parts.
2. metal waterproof case as claimed in claim 1, is characterized in that: the material of described metal shell is metallic aluminium, magnesium metal, metallic copper, aluminium alloy, magnesium alloy or copper alloy.
3. metal waterproof case as claimed in claim 2, is characterized in that: the width of described sealing boss is 0.05～1mm, is highly 0.05～0.2mm, and the width 0.05～1mm of described containing groove, the degree of depth are 0.05～0.2mm.
4. metal waterproof case as claimed in claim 3, is characterized in that: the volume of described containing groove is more than or equal to the volume of described sealing boss.
5. metal waterproof case as claimed in claim 1, is characterized in that: the material of described silica gel waterproof portion is bi-component liquid-state silicon gel.
6. metal waterproof case as claimed in claim 5, rises and is characterised in that: the material of described silica gel waterproof portion is self-adhering-type liquid-state silicon gel.
7. metal waterproof case as claimed in claim 1, is characterized in that: at least one side angle of falling C or the fillet of described sealing boss.
8. metal waterproof case as claimed in claim 7, is characterized in that: the C angle of described sealing boss or fillet are positioned at the side of described sealing boss away from containing groove.
9. a manufacture method for the electronic product metal waterproof case as described in claim 1 to 8 any one, is characterized in that, comprises the following steps:
S1, formation metal shell: described metal shell comprises the waterproof position of bone that protrudes from inner surface, described metal shell inner surface raises up respectively in the position of the interval, both sides of described waterproof position of bone preset distance and forms sealing boss, and the inner surface of the described metal shell of at least one side of described sealing boss is recessed to form containing groove;
S2, in-mould injection moulding: when matched moulds, mould is directly pressed on described sealing boss, at least a portion of described sealing boss generation deformation and sealing boss is pressed in described containing groove, thereby make mould and described metal shell form near closed hollow ring by described sealing boss, again to described die cavity injection silica gel, die sinking after baking forms and the silica gel waterproof portion of described metal shell one on the waterproof position of bone, and side surface or the top of described silica gel waterproof portion have protuberance.
10. manufacture method as claimed in claim 9, is characterized in that: in described step S1, form described metal shell by punching press or CNC processing or die casting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132407.XA CN103929915B (en) | 2014-04-02 | 2014-04-02 | Waterproof metal outer shell of electronic product and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410132407.XA CN103929915B (en) | 2014-04-02 | 2014-04-02 | Waterproof metal outer shell of electronic product and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN103929915A true CN103929915A (en) | 2014-07-16 |
| CN103929915B CN103929915B (en) | 2017-01-18 |
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Cited By (8)
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| CN105484584A (en) * | 2016-01-28 | 2016-04-13 | 恩坦华汽车零部件（镇江）有限公司 | Waterproof mechanism for automobile side door lock |
| CN105643214A (en) * | 2016-03-25 | 2016-06-08 | 广东欧珀移动通信有限公司 | Machining method for rear cover assembly of mobile terminal |
| CN105965777A (en) * | 2016-05-16 | 2016-09-28 | 宁波瑞元模塑有限公司 | Overflowing preventing mechanism of PU mold |
| CN107139386A (en) * | 2017-03-23 | 2017-09-08 | 捷开通讯(深圳)有限公司 | The housing and its equipment and preparation method of a kind of achievable high leakproofness |
| CN107498886A (en) * | 2017-07-31 | 2017-12-22 | 东莞市那宏五金科技有限公司 | A kind of silica gel and metal combination handling process |
| CN107896267A (en) * | 2017-12-22 | 2018-04-10 | 东莞市辰荣硅胶电子有限公司 | A kind of mobile phone silica gel waterproof sleeve |
| CN109479381A (en) * | 2016-07-19 | 2019-03-15 | 日立汽车系统株式会社 | Electronic control unit and its assemble method |
| CN111271452A (en) * | 2018-12-05 | 2020-06-12 | 众鼎瑞展电子科技(深圳)有限公司 | Waterproof sealing ring |
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| CN107896267A (en) * | 2017-12-22 | 2018-04-10 | 东莞市辰荣硅胶电子有限公司 | A kind of mobile phone silica gel waterproof sleeve |
| CN111271452A (en) * | 2018-12-05 | 2020-06-12 | 众鼎瑞展电子科技(深圳)有限公司 | Waterproof sealing ring |
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| CN103929915B (en) | 2017-01-18 |
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Address after: 523878 Changan City, Guangdong Province town on the corner management area Co-patentee after: Dongguan Hua Jing powder metallurgy company limited Patentee after: Guangdong wins smart group Limited by Share Ltd Address before: 523878 Changan City, Guangdong Province town on the corner management area Co-patentee before: Dongguan Hua Jing powder metallurgy company limited Patentee before: Dongguan Janus Precision Components Co., Ltd. |
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Effective date of registration: 20210107 Address after: 644000 Hengxu science and Technology Industrial Park, west section of Gangyuan Road, Lingang Economic Development Zone, Yibin City, Sichuan Province Patentee after: Yibin Chuangshi Machinery Co.,Ltd. Address before: 523878 corner management area, Changan Town, Guangdong, Dongguan Patentee before: GUANGDONG JANUS INTELLIGENT GROUP Corp.,Ltd. Patentee before: DONGGUAN HUAJING POWDER METALLURGY Co.,Ltd. |