CN103906385A - Electronic product casing and manufacture method thereof - Google Patents
Electronic product casing and manufacture method thereof Download PDFInfo
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- CN103906385A CN103906385A CN201210588760.XA CN201210588760A CN103906385A CN 103906385 A CN103906385 A CN 103906385A CN 201210588760 A CN201210588760 A CN 201210588760A CN 103906385 A CN103906385 A CN 103906385A
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Abstract
The invention provides an electronic product casing which is provided with a water-soluble hardened layer, a soft rubber layer and a hard rubber layer in sequence, wherein the water-soluble hardened layer is made from the material selected from one of polyving akohol, polyvinyl acetate and polyvinyl acetal. The invention further provides a manufacture method of the electronic product casing. According to the electronic product casing and the manufacture method of the electronic product casing, the double-shot molding technology is adopted. The electronic product casing adopts the structure that soft rubber is embedded inside the electronic product casing and hard rubber wraps the soft rubber, the water-soluble hardened layer has a protection function, therefore, secondary processing can be implemented on soft and hard rubber bi-color products successfully and effectively, and process yield is increased greatly.
Description
Technical field
The present invention relates to electronic product and manufacture field, relate in particular to a kind of flexible glue class injecting products field.
Background technology
Along with constantly weeding out the old and bring forth the new of current digital electronic goods, market competition is growing more intense, and the traditional material that manufacturing industry adopts and process technology thereof are more and more difficult to meet client and consumer demand.Double-shot moulding technique is manufactured means as a kind of rising in recent years rapid popular product, has made up to a certain extent the shortcoming of common injection moulding processing procedure, has expanded selection and the scope of application of material, has enriched outward appearance and the processing effect of product.But this technology more traditional engineering plastics such as PC/ABS alloy, Merlon (PC), polymethyl methacrylate (PMMA) etc. of relying on that remain unchanged are at present difficult on sense organ, to give variation and superior user experiences.Thermoplastic elastic material take plastic polyurethane elastomer (TPU) as representative is paid close attention to because its outstanding compatibility, excellent physical and mechanical properties are subject to industry gradually.The masterwork iPhone of Apple has expedited the emergence of the fashionable of flexible glue (soft touch effect) containment vessel especially.This kind of material relies on the excellent mechanical properties that has rubber and plastics concurrently, plastic color scheme flexibly, outstanding environmental resistance, and and multiple macromolecular material between good adhesive force, more and more manyly embody as the Assembly part of the electronic products such as mobile phone.But due to itself characteristic limitations, secondary workability is poor, conventionally cannot guarantee desired dimensional tolerance, therefore be difficult to the directly raw material as moulding fine structure such as phone housing.At present there is no better mode for the secondary operations of the flexible glue series products such as TPU.Conventionally the scheme adopting has two kinds: 1,, according to the corresponding tool of product structure design, will after product orientation the common diaphragm of fitting, make machining, after take off parts the manual rete that removes; 2, directly implement radium carving (laser engraving) at product surface.The shortcoming of such scheme 1 is: add and cannot guarantee process accurate positioning man-hour, TPU material is sticky cutter easily, and forms burr or damage type web-like chip, and manual striping workshop section wastes time and energy; The shortcoming of scheme 2 is: the laser of different-waveband very easily causes sex change or the coking phenomenon of product working position, has destroyed its appearance, causes meeting customer need.
Summary of the invention
In order to solve the low problem of procedure for processing yield after the double-shot moulding electronic product casing CNC existing in prior art, the invention provides a kind of electronic product casing, this electronic product casing has that the flexible glue of water-soluble hardened layer-flexible glue layer-ebonite layer is embedded, the three-decker of ebonite outsourcing, and described water-soluble hardened layer is selected from the one in polyvinyl alcohol, polyvinyl acetate, Pioloform, polyvinyl acetal.
The present invention also provides a kind of preparation method of electronic product casing, comprises step: 1) adopt double-shot moulding, wherein, the first chromogen material is ebonite, and the second chromogen material is flexible glue, obtains injection moulded products; 2) on the flexible glue face of the injection moulded products obtaining in step 1), spray water-soluble hardened layer, obtain spraying parts; 3) by step 2) the spraying parts that obtain do digital control processing by drawing, obtain electronic product casing of the present invention, and wherein, described water-soluble hardened layer is selected from the one in polyvinyl alcohol, polyvinyl acetate, Pioloform, polyvinyl acetal.Wherein, " the first look " in double-shot moulding and " the second look " are all and well known to a person skilled in the art technical term, " the first look " and " the second look " also can be designated as respectively " first penetrates " and " second penetrates ", " one penetrates ", " two penetrate " reality have represented the topology layout of dichroic materials product, one injected plastics material of penetrating forms the outer surface of product shell, and two penetrate the inner surface of material formation product shell.
The present invention is take double-shot moulding technology as support; on relating to, product adopts " ebonite outsourcing, flexible glue is embedded " configuration, and by imposing water-based hardened layer coating protection; effectively guarantee the successful implementation of secondary operations on the double-colored product of soft or hard glue, greatly improved process rate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of " ebonite outsourcing, flexible glue is embedded " disclosed by the invention electronic product casing configuration.Wherein, 1 is water-soluble hardened layer, and 2 is flexible glue layer, and 3 is ebonite layer.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of electronic product casing, this electronic product casing has the three-decker of water-soluble hardened layer-flexible glue layer-ebonite layer, and the material of described water-soluble hardened layer is selected from one or more in polyvinyl alcohol, polyvinyl acetate, Pioloform, polyvinyl acetal.
Electronic product casing disclosed in this invention is in product structure design: ebonite outsourcing, flexible glue is embedded, the technical term that flexible glue of the present invention and ebonite are known to the skilled person.Effectively avoid the problem that making coatings protection occurs on flexible glue face, for example, because of thermoplastic elastomer (TPE) TPU superficiality the subject of knowledge and the object of knowledge limit, cannot be by problems such as ultraviolet-resistant aging and pencil hardness tests.
According to the present invention, preferably, described flexible glue layer is selected from one or more in thermoplastic polyurethane (TPU), thermoplastic elastomer (TPE) (TPE), terephthalic acid (TPA) (TPA), ethylene-vinyl acetate copolymer (EVA).
According to the present invention, preferably, described ebonite layer is selected from one or more in Merlon (PC), modification material of polycarbonate PC/ABS, polyamide (nylon PA), polymethyl methacrylate (PMMA), polystyrene (PS), polyethylene (PE), polypropylene (PP), acrylonitrile-butadiene-styrene copolymer (ABS).
According to the present invention, preferably, the thickness of described hardened layer is 0.7-1.2mm, and the thickness of described flexible glue layer is 0.5-1.0mm, and the thickness of described ebonite layer is 0.01-0.05mm.
The present invention also provides a kind of preparation method of electronic product casing, comprises step: 1) adopt double-shot moulding, wherein, the first chromogen material is ebonite, and the second chromogen material is flexible glue, obtains injection moulded products; 2) on the flexible glue face of the injection moulded products obtaining in step 1), spray water-soluble hardened layer, obtain spraying parts; 3) by step 2) the spraying parts that obtain do digital control processing by drawing, obtain electronic product casing of the present invention, and wherein, the material of described water-soluble hardened layer is selected from one or more in polyvinyl alcohol, polyvinyl acetate, Pioloform, polyvinyl acetal.Preferably, the digital control processing direction in described step 3) is: from top to bottom, from water-soluble hardened layer through flexible glue layer to ebonite layer.
According to above-mentioned preparation method, preferably, the ebonite in described step 1) is selected from one or more in Merlon, modification material of polycarbonate PC/ABS, polyamide, polymethyl methacrylate, polystyrene, polyethylene, polypropylene PP, acrylonitrile-butadiene-styrene copolymer.
According to above-mentioned preparation method, preferably, the flexible glue in described step 1) is selected from one or more in thermoplastic polyurethane, thermoplastic elastomer (TPE), terephthalic acid (TPA), ethylene-vinyl acetate copolymer.
According to above-mentioned preparation method, preferably, the first look in described step 1): injection pressure: 2600 ± 200kgf/ cm
2; Firing rate: 120 ± 10mm/s.
According to above-mentioned preparation method, preferably, the second look in described step 1): injection pressure: 2000 ± 200kgf/cm
2; Firing rate: 100 ± 10mm/s.If be further etched on the second look flexible glue face and given Logo or pattern by mould, its effect reaching outclass apparent that the second look ebonite material surface obtains, and has greatly improved definition.
According to above-mentioned preparation method, preferably, also comprise step: the parts after spraying are dried to baking temperature 40-50 ℃.
According to above-mentioned preparation method, wherein, the injection moulded products structure that described step 1) obtains is ebonite outsourcing, and flexible glue is embedded.
Preparation method disclosed in this invention can be applicable to the electronic products such as mobile phone, MP3/MP4, portable/panel computer, digital camera and manufactures field, can on flexible glue class injecting products, realize smoothly secondary operations or pattern effect.
According to above-mentioned preparation method, further preferably, also comprise step: dry laggard row digital control processing.
According to above-mentioned preparation method, still more preferably, also comprise step: after digital control processing, product is washed.
The preferred technical solution of the present invention can specifically describe and be: take traditional engineering plastic PC, PC/ABS etc. as the first look; take flexible glues such as TPU as the second look; adopt the technique of double-shot moulding; after moulding, implement surface spraying; adhering to can protective finish PVA(polyvinyl alcohol with water-based) etc., carry out digital control processing (CNC) secondary operations and clean after obtain final products.
Fabrication processing can specifically describe and be: product structure design, and--tool and injection mold are opened system, and----aqueous coating protection--is dried--CNC--washing--finished product to dual-color forming.Can further specifically describe and be: 1, deisgn product structural drawings; 2, develop corresponding injection mold and spraying, CNC tool; 3, double-shot moulding; 4, the moulding after moulding is placed in spray finishing jig and gives water-soluble hardened layer coating, guarantee that coating is even; 5, spraying parts are put into baking oven and be dried processing, time 15min-20min, baking temperature is set in 40-50 ℃; 6, dried sample is done by drawing to digital control processing (CNC); 7, sample is washed, obtained final finished.
By above step, can be made into the double-colored product of a kind of novel flexible glue.This technical scheme has accurately been processed holes of products structure, is obviously better than the not material of sprayed coating being coated with CNC processing characteristics on water-soluble poval layer flexible glue layer, and burr phenomenon does not appear in product processing edge, and machining accuracy is 0.05mm.Described water-soluble hardened layer is in order to improve the cutter precision of doing secondary mechanical processing on flexible glue face, and improve processing after appearance, risk is burnt in the part of having avoided burr due to cutting or radium carving to cause, water-soluble hardened layer is as the aid in the course of processing, is water-solublely completely removed and leaves no trace afterwards because it is extremely excellent.The process of both having exempted on the whole artificial striping, has shortened man-hour, has also effectively promoted the yield of product processing procedure, and has saved cost.
The surface effect variation that this product of the present invention has at utmost utilized double-shot moulding and TPU material to bring, has effectively overcome the bad sign that traditional handicraft causes for elastomeric material machining, and then has widened the space of this type of material future market application.
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
1, deisgn product drawing, opens injection mold processed and spraying, CNC tool
Design and develop the structural drawings of battery of mobile phone bonnet, open injection mold processed and spray finishing jig according to product configurations, guarantee mould tool dimensional accuracy;
2, injection moulding raw material
The dichroic materials combination of selecting PC+TPU, wherein the first chromogen material is PC1231T(Sabic), the second chromogen material is TPU83085A(Bayer);
3, double-shot moulding
The first look PC1231T: injection pressure: 2600kgf/ cm
2, firing rate: 110mm/s, dynamic model temperature: 158 ℃, cover half temperature: 120 ℃, baking temperature: 120 ℃, drying time: 4h;
The second look TPU83085A: injection pressure: 2000kgf/ cm
2, firing rate: 100mm/s, dynamic model temperature: 158 ℃, cover half temperature: 20 ℃, baking temperature: 100 ℃, drying time: 4h; Obtain injection mo(u)lding sample;
4, water-soluble hardened layer spraying
Injection mo(u)lding sample is placed in spray finishing jig and gives PVA spraying, guarantee uniformity;
5, parts are dry
Spraying back part is positioned in baking oven and carries out vacuumize, and setting baking temperature is 45 ℃, and baking time is 20min;
6, digital control processing
Sample is clamped in and in tool, puts into numer centre and make machining, and board model is FANUC(Fa Nake), machined parameters is as follows:
TPU(flexible glue): tool specification (Φ 3.175*2*6), rotating speed (12000+/-3000RPM), feeding (2500+/-500mm/min), the length 22.5mm of position, hole, width 8.7mm;
PC(ebonite): tool specification (Φ 6*1.5*6), rotating speed (20000+/-5000RPM), feeding (1500+/-500mm/min), the length 8.7mm of position, hole, width 22.5mm;
7, washing, obtains final finished
Product after numerical control machine processing is placed in to conveyer belt and is delivered in tank with after clear water rinsing, dry and obtain required product S1.
Embodiment 2
Compared with embodiment 1, difference is, uses " the dichroic materials combination of PC/ABS+TPU " replacement " the dichroic materials combination of PC+TPU ", and wherein, PC/ABS is selected from the PC/ABS C1200HF of sabic company, and all the other are all identical with embodiment 1, obtain product S2.
Compared with embodiment 1, difference is, lacks step 5, and all the other are all identical with embodiment 1, obtain product S3.
Embodiment 4
Compared with embodiment 1, difference is, difference is that step 3 parameter is for " the first look PC1231T: injection pressure: 2400kgf/ cm
2, firing rate: 120mm/s, dynamic model temperature: 100 ℃, cover half temperature: 80 ℃, baking temperature: 120 ℃, drying time: 4h;
The second look TPU83085A: injection pressure: 1800kgf/ cm
2, firing rate: 110mm/s, dynamic model temperature: 100 ℃, cover half temperature: 60 ℃, baking temperature: 80 ℃, drying time: 4h; Obtain injection mo(u)lding sample; ", all the other are all identical with embodiment 1, obtain product S4.
Embodiment 5
Compared with embodiment 1, difference is, uses " the dichroic materials combination of PMMA+TPE " replacement " the dichroic materials combination of PC+TPU ", and all the other are all identical with embodiment 1, obtain product S5.
Embodiment 6
Compared with embodiment 1, difference is, in step 4, uses " polyvinyl acetate " replacement " PVA ", and all the other are all identical with embodiment 1, obtain product S6.
Comparative example 1
Compared with embodiment 1, difference is, step 6 is replaced to following steps:
Use tool to be fixed on stamping machine workbench in sample, carry out Punching Technology, die-cut pressure 10kg, the length 8.7mm of position, hole, width 22.5mm, all the other are all identical with embodiment 3, obtain product DS1.
Comparative example 2
Compared with embodiment 1, difference is, step 6 is replaced to following steps:
Use tool to be fixed on CO2 laser work platform in sample, carry out cutting processing, working power 40W, the length 8.7mm of position, hole, width 22.5mm, all the other are identical with embodiment 4, obtain product DS2.
Comparative example 3
Compared with embodiment 1, difference is, lacks step 4 and 5, and all the other are all identical with embodiment 1, obtain product DS3.
Performance test
1. in sample well structure vertical direction, adopt monochromatic light to amplify 4 times and be projected on test desk;
2. observe through hole projecting edge burr, measure its pore structure length and width size, and record data;
3. data are dwindled to 4 times, data are counted non-defective unit in hole length 22.5 ± 0.05 and hole wide 8.7 ± 0.05.
| ? | Sample test method | Test quantity pcs | Yield % |
| S1 | Sciagraphy | 100 | 98 |
| S2 | Sciagraphy | 100 | 98 |
| S3 | Sciagraphy | 100 | 90 |
| S4 | Sciagraphy | 100 | 84 |
| S5 | Sciagraphy | 100 | 95 |
| S6 | Sciagraphy | 100 | 96 |
| DS1 | Sciagraphy | 100 | 5 |
| DS2 | Sciagraphy | 100 | 17 |
| DS3 | Sciagraphy | 100 | 53 |
As seen from the above table, adopt technical scheme of the present invention accurately to process holes of products structure, spray water-soluble hardened layer on flexible glue layer after, CNC processing characteristics is obviously better than the not material of sprayed coating, water-soluble hardened layer spraying and CNC digital control processing are in conjunction with making product processing edge not occur burr phenomenon, and process rate is high.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. an electronic product casing, is characterized in that, this electronic product casing has the three-decker of water-soluble hardened layer-flexible glue layer-ebonite layer, and the material of described water-soluble hardened layer is selected from the one in polyvinyl alcohol, polyvinyl acetate, Pioloform, polyvinyl acetal.
2. electronic product casing according to claim 1, is characterized in that, the material of described flexible glue layer is selected from one or more in thermoplastic polyurethane, thermoplastic elastomer (TPE), terephthalic acid (TPA), ethylene-vinyl acetate copolymer.
3. electronic product casing according to claim 1, it is characterized in that, the material of described ebonite layer is selected from one or more in Merlon, modification material of polycarbonate PC/ABS, polyamide, polymethyl methacrylate, polystyrene, polyethylene, polypropylene, acrylonitrile-butadiene-styrene copolymer.
4. electronic product casing according to claim 1, is characterized in that, the thickness of described hardened layer is 0.7-1.2mm, and the thickness of described flexible glue layer is 0.5-1.0mm, and the thickness of described ebonite layer is 0.01-0.05mm.
5. a preparation method for electronic product casing, comprises step: 1) adopt double-shot moulding, wherein, one to penetrate raw material be ebonite, and two to penetrate raw material be flexible glue, obtains injection moulded products; 2) on the flexible glue face of the injection moulded products obtaining in step 1), spray water-soluble hardened layer, obtain spraying parts; 3) by step 2) the spraying parts that obtain do digital control processing by drawing, obtain electronic product casing claimed in claim 1, and wherein, described water-soluble hardened layer is selected from the one in polyvinyl alcohol, polyvinyl acetate, Pioloform, polyvinyl acetal.
6. preparation method according to claim 5, its spy is being, in described step 3) digital control processing direction be from water-soluble hardened layer through flexible glue layer to ebonite layer.
7. preparation method according to claim 5, its spy is being, the ebonite in described step 1) is selected from the one in Merlon, modification material of polycarbonate PC/ABS, polyamide, polymethyl methacrylate, polystyrene, polyethylene, polypropylene PP, acrylonitrile-butadiene-styrene copolymer.
8. preparation method according to claim 5, its spy is being, the flexible glue in described step 1) is selected from the one in thermoplastic polyurethane, thermoplastic elastomer (TPE), terephthalic acid (TPA), ethylene-vinyl acetate copolymer.
9. preparation method according to claim 5, its spy is being, the first look in described step 1): injection pressure: 2600 ± 200kgf/cm
2; Firing rate: 120 ± 10mm/s.
10. preparation method according to claim 5, its spy is being, the second look in described step 1): injection pressure: 2000 ± 200kgf/cm
2; Firing rate: 100 ± 10mm/s.
11. preparation methods according to claim 5, its spy is being, also comprises step: the parts after spraying are first dried to baking temperature 40-50 ℃.
12. preparation methods according to claim 5, its spy is being, also comprises step: after digital control processing, product is washed.
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| CN104175447A (en) * | 2014-08-07 | 2014-12-03 | 浙江锦盛包装有限公司 | Process for forming thick-wall transparent products |
| CN106543676A (en) * | 2016-10-26 | 2017-03-29 | 安徽飞达电气科技有限公司 | Excellent capacitor plastic housing of a kind of noise reduction performance and preparation method thereof |
| CN107692448A (en) * | 2017-08-27 | 2018-02-16 | 昆山六二丰塑胶电子有限公司 | Bicolor plastic cement shell and preparation method thereof |
| CN111231222A (en) * | 2020-01-18 | 2020-06-05 | 深圳市吉迩科技有限公司 | Three-proofing aerosol generating device main body, aerosol generating device and double-color injection molding method |
| CN115139365A (en) * | 2022-06-27 | 2022-10-04 | 杭州逗酷软件科技有限公司 | Method for manufacturing structural member and electronic device |
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