CN110406080A - Integrated center injection molding imitates glass mobile phone shell attaching process - Google Patents
Integrated center injection molding imitates glass mobile phone shell attaching process Download PDFInfo
- Publication number
- CN110406080A CN110406080A CN201910712052.4A CN201910712052A CN110406080A CN 110406080 A CN110406080 A CN 110406080A CN 201910712052 A CN201910712052 A CN 201910712052A CN 110406080 A CN110406080 A CN 110406080A
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- China
- Prior art keywords
- injection molding
- diaphragm
- mobile phone
- phone shell
- pressure disc
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
- B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
Abstract
The present invention relates to integrated center injection moldings to imitate glass mobile phone shell attaching process, include the following steps and prepares rupture pressure disc, including being processed to obtain required rupture pressure disc to the basic rupture pressure disc with OCA optical cement, rupture pressure disc is carried out hot-forming, the explosion-proof diaphragm of 3D is obtained, the explosion-proof diaphragm of the 3D is placed on die cutting die and carries out outline die；Prepare integrated center, CNC working process.The present invention solves the problems, such as that toughness is low, impact resistance is poor and signal shielding and the technique to mobile phone configuration design provide biggish choice and design space.
Description
Technical field
The present invention relates to a kind of mobile phone shell preparation processes, more particularly to integrated center injection molding to imitate the fitting of glass mobile phone shell
Technique.
Background technique
With the development of electronic technology and requirement of the user to terminal device usage experience is higher and higher, existing flat
Face curtain is difficult to meet the use demand of user.Therefore, the concepts such as curve screens are come into being, and such screen can be realized song
Face is shown.But due to current screen there is a problem of it is various, can be realized in the market production and few.
Metal shell commonly used in the prior art easily generates signal interference, and 3D glass or plastics to WIFI, NFC, LIFI
Mobile phone aesthetic measure and feel can be substantially improved in cover board, so currently, metal shell is gradually changed to 3D glass when preparing shell
Shell made of glass or plastic material.Meanwhile the invention of the new mechanics of communication of 4G/5G also can promote 3D glass or plastic cover plate in hand
Application on machine.
At present in industry, for 3D curved surface cover board mainly based on glass substrate, technique mainly includes following procedure: CNC (number
Control lathe) sawing sheet-CNC finishing impression (edging)-grinding and polishing-cleaning-hot bending-is two-sided clears off-tempering-UV transfer-plating
Film (PVD)-prints (silk-screen, spraying or exposure development)-fitting-pad pasting-packaging.3D glass cover-plate processing technology complexity,
Technology difficulty is big, causes processing yield low, at high cost, and glass baseplate there is not stretch-proof, complex three-dimensional structure to be difficult to realize,
The defects of toughness is low, impact resistance is poor.Therefore, the realization degree of the complex three-dimensional structure of cover board in the prior art, toughness, anti-
Impact property needs to be further increased.
Summary of the invention
The present invention is low, at high cost in order to solve glass substrate processing yield, and glass baseplate has not stretch-proof, complexity three
Dimension structure is difficult to realize, the problem that toughness is low, impact resistance is poor provides integrated center injection molding and imitates the fitting of glass mobile phone shell
Technique, the present invention forms integrated center mobile phone shell using accurate compression Shooting Technique, instead of original aluminium alloy center+glass
Glass/plastic cement battery cover technique, saves center cost；And it solves that toughness is low, impact resistance is poor and signal shielding is asked
The topic and technique to mobile phone configuration design provides biggish choice and design space.
The technical solution used in the present invention are as follows: integrated center injection molding imitates glass mobile phone shell attaching process, including with
Lower step
Rupture pressure disc is prepared, including
(1) the basic rupture pressure disc (PET rupture pressure disc) with OCA optical cement is processed to obtain required rupture pressure disc, specifically includes a and adopts
It is imprinted on nanometer air brushing or nanometre glue and carries out the coloring of gradient color on basic rupture pressure disc and obtain gradual change coating, b is applied in the gradual change
Optical effects are suppressed on layer, cPVD optical coating carries out optical brightening anti-reflection coating, d printing base colour on the coating obtained by c；
(2) hot-forming to rupture pressure disc progress, obtain the explosion-proof diaphragm of 3D
(3) the explosion-proof diaphragm of the 3D is placed on die cutting die and carries out outline die；
Integrated center is prepared, including
(1) integrated center injection molding: 3D compression injection molding is carried out using transparent plastic and obtains integrated center plastic parts；
(2) cure process is carried out to the integrated center plastic parts；
One fitting: the explosion-proof diaphragm of 3D after punching press is integrally bonded with the integrated center plastic parts after hardening, to material after fitting
Material carries out vacuum high-pressure deaeration processing；
CNC working process.
Further, the hot-forming specific procedure of processing is
(1) rupture pressure disc is fixed on the location hole of hot bending die mother film；
(2) it by the heating device of bending shaping machine, is moved to and has fixed above mold, diaphragm is heated and softened, heat
Parameter: 330-360 °C, 10-15S；
(3) after the completion of thermal softening to be added, heating plate is retracted to initial position, is then driven by the hydraulic device of bending shaping machine
Dynamic male model, molding push, and are diaphragm molding, hot compression parameters: tonnage 18-22T, dwell time 3-6S；
(4) after the completion of pressure maintaining, hot-forming machine hydraulic equipment is retracted to initial position, male model is removed, diaphragm and female film dew
Out；
(5) diaphragm after molding for having 3D moulding is taken out from mold.
Further, the basic rupture pressure disc successively includes following material layer: PET protection film layer, OCA optical adhesive layer, PET
Substrate layer and PET protection film layer；The OCA optical adhesive layer thickness 25-50um, pulling capacity 20-30N；The PET base material thickness
For 50-75um.
Further, PVD plated film of the present invention is non-conductive vacuum plated film, the PVD plated film specifically comprises the processes of:
Hanger-vacuumizes-pretreatment-ion sputtering film coating-deflation.Hanger: be by material on the carrier of coating machine；
It vacuumizes: the vacuum chamber of coating machine (furnace) is vacuumized；Pretreatment: ion bombardment increases the adhesive force of following layer.
Further, the processing step of the 3D compression injection molding are as follows: material molten-upper mold-debugging-molding-
Injection filling-pressure maintaining molding-cooling-die sinking.
Further, the transparent plastic is polymethyl methacrylate and/or polycarbonate;The material molten
Temperature is 210 250 °, and the injection pressure of injection filling is 80 130MPa, and injection time is 2 58, the pressure maintaining at
The pressure of type is 40 60MPa, and the pressure maintaining molding time is 20 ~ 40S.
Further, the hardening bath ingredient that cure process is used includes urethane acrylate, and the time of hardening is 10
500 ~ 700mj of 20s, UV energy.
Further, one fitting specifically includes:
(1) diaphragm and plastic parts are positioned, is then placed in the vacuum cavity of 3D make-up machine, vacuumizes, when vacuum degree reaches
140-160pa presses the upper cover moulding (jig is divided into pedestal and upper cover moulding) of jig, is allowed to close with the explosion-proof diaphragm of 3D
Fitting, is then acted by pressure pressure maintaining, is bonded the explosion-proof diaphragm of 3D and each position in inner cavity of integrated center plastic parts completely；
(2) material after fitting is taken out from jig, is put into vacuum degasing machine mesohigh deaeration；Deaeration parameter: vacuum degree -90
~ -100, pressure 16-18mpa, temperature: 60-70 °C, the time: 30-60min.
Beneficial effect caused by the present invention includes: the preparation method that glass 3D curved surface cover board is imitated in integration of the invention,
Glass 3D curved surface cover board is imitated in the integration as made from 3D injection molding, hardening, PVD plated film, spray processing technique, relative to metal or
Glass cover-plate, cost savings 60%;Plasticity is strong, and R2.Omm or more can be realized, is that glass workpiece cannot compare；Anti-impact
It hits performance and reaches 0.5J or more, much higher than the shock resistance of glass workpiece 0.2J;5G signal shielding is low, small to electromagnetic wave loss,
The shortcomings that overcoming metallic shield effect；Surface hardness is 5 6H/1000g, reaches glass effects;Surface abrasion resistance is good, wear-resisting
Property is reached for 5000 times/1000g or more；Good corrosion resistance, the corrosion of surface siliconization layer protective effect hindered acid alkali chemicals;It is high
Cold temperature impact is good, under the conditions of -40 °C/+ 75 °C of temperature, circulation impact 48H or more;Ageing resistance is good, and UV illumination is rapidly
Phenomena such as amount of radiation 0.63w/m2/nm, 96H of radiation are without discoloration, crackle；The present invention can be real by the preparation process of 3D rupture pressure disc
The ID effect diversification of existing rupture pressure disc, promotes the texture and light sensation of rupture pressure disc, and 3D attaching process realizes the high stretch of mobile phone shell.
Specific embodiment
Further details of explanation is done to the present invention With reference to embodiment, it should be appreciated that of the invention
Protection scope be not limited by the specific implementation.
Embodiment 1
Integrated center injection molding is imitated glass mobile phone shell attaching process and is included the following steps:
1) the explosion-proof film preparation of 3D: the PET base material rupture pressure disc with OCA optical cement (25um) is processed；
The coloring of gradient color is realized in or nanometers of offset printings of A nanometers of air brushing；
B UV embossing, by decorative effects such as optical effects, in such a way that submodule nip drum transfers, in the gradual change coating material of step A)
Optical effects are realized on material；
C PVD optical coating carries out optical brightening anti-reflection coating on the material coating of step B)；PVD plated film is non-conductive true
Empty plated film, the PVD plated film specifically comprises the processes of: hanger-vacuumizes-pretreatment-ion sputtering film coating-deflation.
It can realize that textured pattern is realized in ID color, printing and spraying by coating process.
D printing base colour, on the material coating of step C) with carrying out printing color lid, print steps are 3-4 layers general, often
Tunic thickness 6-7um, colour match: generally white+black+mute black；
The PET base material rupture pressure disc specification used in the present embodiment are as follows: PET protection film+OCA optical cement+PET base material+PE protective film；
Wherein emphasis manages material are as follows: OCA optical cement, thickness 25um, acrylic property, pulling capacity 20-30N；PET base material, thickness
50um；
2) hot-forming: hot-pressing processing being carried out to the rupture pressure disc prepared through step 1), obtains the explosion-proof diaphragm of 3D.The process needs
Cooperate hot bending die and bending shaping machine, specific procedure of processing is as follows:
Rupture pressure disc is fixed on the location hole of hot bending die mother film by A；
The heating device of bending shaping machine is moved to above the hot bending die fixed by B, is heated and softened to diaphragm,
Heating parameters: 330 °C, 10S；
Heating plate is retracted to initial position, is then driven by the hydraulic device of bending shaping machine after the completion of step B) by C
Male model, molding push, diaphragm molding, hot compression parameters: tonnage 20T, dwell time 5S；
D retracts hot-forming machine hydraulic equipment to initial position after the completion of step C) pressure maintaining, and male model is removed, explosion-proof diaphragm
And female film exposes；
E takes out the explosion-proof diaphragm after molding for having 3D moulding to obtain 3D rupture pressure disc from mold；
3) diaphragm is punched: 3D rupture pressure disc being placed on die cutting die and carries out outline die；
4) 3D injection molding: 3D compression injection molding is carried out using optical-grade transparent plastics, this injection molding is integrated center note
Modeling；Optical-grade transparent plastics are polymethyl methacrylate (PMM) and polycarbonate (PC);
The processing step of 3D compression injection molding are as follows: material molten-upper mold-debugging-molding-injection filling-pressure maintaining at
Type-cooling-die sinking.Any thickness of 0.5 3.Omm may be implemented in product thickness made of Shooting Technique through this step;
Flatness is preferable;Product thickness is uniform;Flow leveling is preferable;Internal stress free trace and rainbow line etc. are bad；The temperature of material molten
It is 210 DEG C, the injection pressure of injection filling is 80 130MPa, and the injection pressure of injection filling is 80 MPa, 90 MPa, 100
MPa, 110 MPa, 120 MPa, 130 MPa injection times are 2s, and the molding pressure of pressure maintaining is 40MPa, pressure maintaining molding time
For 10s.
5) it cure process: will be handled through step 4) 3D material hardening formed after injection molding；The hardening that cure process is used
The main component of liquid is urethane acrylate, firm time 10s, UV energy 600mj.
6) 3D is bonded: the material after step 5) cure process being carried out 3D with the diaphragm of step 3) and is integrally bonded, is pasted
Vacuum high-pressure deaeration processing is carried out to material after conjunction；
3D is integrally bonded in step 6), needs joint tool (bearing fixture), and 3D diaphragm and integrated center plastic parts are positioned, led to
Profiling 3D silica gel rubber head is crossed, the pressing of 3D diaphragm is fitted to the moulding inner sidewall of integrated center；
Specifically: the jig for needing to be bonded positioning positions diaphragm and plastic parts, is then placed in the vacuum cavity of 3D make-up machine,
It vacuumizes, when vacuum degree reaches -90, the hydraulic device of slice applying machine bench drives compression bar, presses the upper cover moulding of jig, be allowed to
It fits closely with the 3D diaphragm in rubber head, is then acted by pressure pressure maintaining, keep each position in the inner cavity of diaphragm and plastic parts complete
Fitting；
Material after fitting is taken out from jig, is put into vacuum degasing machine, high pressure deaeration；Deaeration parameter: vacuum degree -90,
Pressure 16mpa, temperature: 60 DEG C, the time: 45min.
Shock resistance is 0.8J or more in the present embodiment;Surface hardness is 5H/1000g, reaches glass effects;Surface is resistance to
Mill property reaches 8000 times/I000g or more；Under the conditions of -40 DEG C /+75 DEG C of temperature, circulation impact 48H or more;Ageing resistance
It is good, the amount of radiation 0.63w/m that UV illumination rapidly radiates2Phenomena such as/nm, 96H are without discoloration, crackle.
Embodiment 2
Integrated center injection molding is imitated glass mobile phone shell attaching process and is included the following steps:
1) the explosion-proof film preparation of 3D: the PET base material rupture pressure disc with OCA optical cement (25um) is processed；
The coloring of gradient color is realized in or nanometers of offset printings of A nanometers of air brushing；
B UV embossing, by decorative effects such as optical effects, in such a way that submodule nip drum transfers, in the gradual change coating material of step A)
Optical effects are realized on material；
C PVD optical coating carries out optical brightening anti-reflection coating on the material coating of step B)；PVD plated film is non-conductive true
Empty plated film, the PVD plated film specifically comprises the processes of: hanger-vacuumizes-pretreatment-ion sputtering film coating-deflation.
It can realize that textured pattern is realized in ID color, printing and spraying by coating process.
D printing base colour, on the material coating of step C) with carrying out printing color lid, print steps are 3-4 layers general, often
Tunic thickness 6-7um, colour match: generally white+black+mute black；
The PET base material rupture pressure disc specification used in the present embodiment are as follows: PET protection film+OCA optical cement+PET base material+PE protective film；
Wherein emphasis manages material are as follows: OCA optical cement, thickness 25um, acrylic property, pulling capacity 20-30N；PET base material, thickness
75um；
1) hot-forming: hot-pressing processing being carried out to the rupture pressure disc prepared through step 1), obtains the explosion-proof diaphragm of 3D.The process needs
Cooperate hot bending die and bending shaping machine, specific procedure of processing is as follows:
Rupture pressure disc is fixed on the location hole of hot bending die mother film by A；
The heating device of bending shaping machine is moved to above the hot bending die fixed by B, is heated and softened to diaphragm,
Heating parameters: 350 °C, 15S；
Heating plate is retracted to initial position, is then driven by the hydraulic device of bending shaping machine after the completion of step B) by C
Male model, molding push, and are diaphragm molding, hot compression parameters: tonnage 18-22T, dwell time 3-6S；
D retracts hot-forming machine hydraulic equipment to initial position after the completion of step C) pressure maintaining, and male model is removed, explosion-proof diaphragm
And female film exposes；
E takes out the explosion-proof diaphragm after molding for having 3D moulding to obtain 3D rupture pressure disc from mold；
3) diaphragm is punched: D rupture pressure disc being placed on die cutting die and carries out outline die；
4) 3D injection molding: 3D compression injection molding is carried out using optical-grade transparent plastics, this injection molding is integrated center
Injection molding；Optical-grade transparent plastics are polymethyl methacrylate (PMMA);
The processing step of 3D compression injection molding are as follows: material molten-upper mold-debugging-molding-injection filling-pressure maintaining at
Type-cooling-die sinking.Any thickness of 0.5 3.Omm may be implemented in product thickness made of Shooting Technique through this step;
Flatness is preferable;Product thickness is uniform;Flow leveling is preferable;Internal stress free trace and rainbow line etc. are bad；The temperature of material molten
It is 230 DEG C, the injection pressure of injection filling is 130MPa, and the injection pressure of injection filling is 100 MPa;Injection time is 2s,
The molding pressure of pressure maintaining is 50MPa, and the pressure maintaining molding time is 30s.
5) it cure process: will be handled through step 4) 3D material hardening formed after injection molding；The hardening that cure process is used
The main component of liquid is urethane acrylate, and the time of hardening is 15s, UV energy 550mj.
6) 3D is bonded: the material after step 5) cure process being carried out 3D with the diaphragm of step 3) and is integrally bonded, is pasted
Vacuum high-pressure deaeration processing is carried out to material after conjunction；
3D is integrally bonded in step 6), needs joint tool (bearing fixture), and 3D diaphragm and integrated center plastic parts are positioned, led to
Profiling 3D silica gel rubber head is crossed, the pressing of 3D diaphragm is fitted to the moulding inner sidewall of integrated center；
Specifically: the jig for needing to be bonded positioning positions diaphragm and plastic parts, is then placed in the vacuum cavity of 3D make-up machine,
It vacuumizes, when vacuum degree reaches -100, the hydraulic device of slice applying machine bench drives compression bar, presses the upper cover moulding of jig, be allowed to
It fits closely with the 3D diaphragm in rubber head, is then acted by pressure pressure maintaining, keep each position in the inner cavity of diaphragm and plastic parts complete
Fitting；
Material after fitting is taken out from jig, is put into vacuum degasing machine, high pressure deaeration；Deaeration parameter: vacuum degree-
100, pressure 18mpa, temperature: 70 °C, the time: 60min.
Shock resistance reaches 0.5J in the present embodiment;Surface hardness is 6H/1000g, reaches glass effects;Surface abrasion resistance
Property reaches 8000 times/I000g；Under the conditions of -40 DEG C /+75 DEG C of temperature, circulation impact 48H or more;Ageing resistance is good, UV light
According to the amount of radiation 0.63w/m rapidly radiated2Phenomena such as/nm, 96H are without discoloration, crackle.
Embodiment 3
Integrated center injection molding is imitated glass mobile phone shell attaching process and is included the following steps:
1) the explosion-proof film preparation of 3D: the PET base material rupture pressure disc with OCA optical cement (25um) is processed；
The coloring of gradient color is realized in or nanometers of offset printings of A nanometers of air brushing；
B UV embossing, by decorative effects such as optical effects, in such a way that submodule nip drum transfers, in the gradual change coating material of step A)
Optical effects are realized on material；
C PVD optical coating carries out optical brightening anti-reflection coating on the material coating of step B)；PVD plated film is non-conductive true
Empty plated film, the PVD plated film specifically comprises the processes of: hanger-vacuumizes-pretreatment-ion sputtering film coating-deflation.
It can realize that textured pattern is realized in ID color, printing and spraying by coating process.
D printing base colour, on the material coating of step C) with carrying out printing color lid, print steps are 3-4 layers general, often
Tunic thickness 6-7um, colour match: generally white+black+mute black；
The PET base material rupture pressure disc specification used in the present embodiment are as follows: PET protection film+OCA optical cement+PET base material+PE protective film；
Wherein emphasis manages material are as follows: OCA optical cement, thickness 25m, acrylic property, pulling capacity 20-30N；PET base material, thickness
50um；
2) hot-forming: hot-pressing processing being carried out to the rupture pressure disc prepared through step 1), obtains the explosion-proof diaphragm of 3D.The process needs
Cooperate hot bending die and bending shaping machine, specific procedure of processing is as follows:
Rupture pressure disc is fixed on the location hole of hot bending die mother film by A；
The heating device of bending shaping machine is moved to above the hot bending die fixed by B, is heated and softened to diaphragm,
Heating parameters: 360 °C, 10S
Heating plate is retracted to initial position, is then driven by the hydraulic device of bending shaping machine after the completion of step B) by C
Male model, molding push, and are diaphragm molding, hot compression parameters: tonnage 20T, dwell time 5S；
D retracts hot-forming machine hydraulic equipment to initial position after the completion of step C) pressure maintaining, and male model is removed, explosion-proof diaphragm
And female film exposes；
E takes out the explosion-proof diaphragm after molding for having 3D moulding to obtain 3D rupture pressure disc from mold；
3) diaphragm is punched: 3D rupture pressure disc being placed on die cutting die and carries out outline die；
4) 3D injection molding: 3D compression injection molding is carried out using optical-grade transparent plastics, this injection molding is integrated center
Injection molding；Optical-grade transparent plastics are polycarbonate (PC);
The processing step of 3D compression injection molding are as follows: material molten-upper mold-debugging-molding-injection filling-pressure maintaining at
Type-cooling-die sinking.Any thickness of 0.5 3.Omm may be implemented in product thickness made of Shooting Technique through this step;
Flatness is preferable;Product thickness is uniform;Flow leveling is preferable;Internal stress free trace and rainbow line etc. are bad；The temperature of material molten
Be 245 DEG C, injection filling injection pressure be 115MPa, injection time 4s, the molding pressure of pressure maintaining be 55MPa, pressure maintaining at
The time of type is 35s.
5) it cure process: will be handled through step 4) 3D material hardening formed after injection molding；The hardening that cure process is used
The main component of liquid is urethane acrylate, and the time of hardening is 10s, UV energy 650mj.
6) 3D is bonded: the material after step 5) cure process being carried out 3D with the diaphragm of step 3) and is integrally bonded, is pasted
Vacuum high-pressure deaeration processing is carried out to material after conjunction；
3D is integrally bonded in step 6), needs joint tool (bearing fixture), and 3D diaphragm and integrated center plastic parts are positioned, led to
Profiling 3D silica gel rubber head is crossed, the pressing of 3D diaphragm is fitted to the moulding inner sidewall of integrated center；
Specifically: the jig for needing to be bonded positioning positions diaphragm and plastic parts, is then placed in the vacuum cavity of 3D make-up machine,
It vacuumizes, when vacuum degree reaches -95, the hydraulic device of slice applying machine bench drives compression bar, presses the upper cover moulding of jig, be allowed to
It fits closely with the 3D diaphragm in rubber head, is then acted by pressure pressure maintaining, keep each position in the inner cavity of diaphragm and plastic parts complete
Fitting；
Material after fitting is taken out from jig, is put into vacuum degasing machine, high pressure deaeration；Deaeration parameter: vacuum degree -95,
Pressure 16mpa, temperature: 60 °C, the time: 45min.
Shock resistance is 1.0J in the present embodiment;Surface hardness is 5H/1000g, reaches glass effects;Surface abrasion resistance
Reach 5000 times/I000g；Under the conditions of -40 DEG C /+75 DEG C of temperature, circulation impact 48H or more;Ageing resistance is good, UV illumination
The amount of radiation 0.63w/m rapidly radiated2Phenomena such as/nm, 96H are without discoloration, crackle.
The above is only a preferred embodiment of the present invention, and the present invention is not limited in the content of embodiment.For in this field
Technical staff for, can have various change and change within the scope of technical solution of the present invention, made any variation and
Change, within that scope of the present invention.
Claims (8)
1. integrated center injection molding imitates glass mobile phone shell attaching process, it is characterised in that: include the following steps
Rupture pressure disc is prepared, including
(1) the basic rupture pressure disc with OCA optical cement is processed to obtain required rupture pressure disc, specifically includes a using nanometer air brushing
Or nanometre glue be imprinted on basic rupture pressure disc carry out gradient color coloring obtain gradual change coating, b suppresses light on the gradual change coating
Texture is learned, cPVD optical coating carries out optical brightening anti-reflection coating, d printing base colour on the coating obtained by c；
(2) hot-forming to rupture pressure disc progress, obtain the explosion-proof diaphragm of 3D
(3) the explosion-proof diaphragm of the 3D is placed on die cutting die and carries out outline die；
Integrated center is prepared, including
(1) integrated center injection molding: 3D compression injection molding is carried out using transparent plastic and obtains integrated center plastic parts；
(2) cure process is carried out to the integrated center plastic parts；
One fitting: the explosion-proof diaphragm of 3D after punching press is integrally bonded with the integrated center plastic parts after hardening, to material after fitting
Material carries out vacuum high-pressure deaeration processing；
CNC working process.
2. one center injection molding according to claim 1 imitates glass mobile phone shell attaching process, it is characterised in that: described
Hot-forming specific procedure of processing is
(1) rupture pressure disc is fixed on the location hole of hot bending die mother film；
(2) it by the heating device of bending shaping machine, is moved to and has fixed above mold, diaphragm is heated and softened, heat
Parameter: 330-360 DEG C, 10-15S, voltage 175-210V；
(3) after the completion of thermal softening to be added, heating plate is retracted to initial position, is then driven by the hydraulic device of bending shaping machine
Dynamic male model, molding push, and are diaphragm molding, hot compression parameters: tonnage 18-22T, dwell time 3-6S；
(4) after the completion of pressure maintaining, hot-forming machine hydraulic equipment is retracted to initial position, male model is removed, diaphragm and female film dew
Out；
(5) diaphragm after molding for having 3D moulding is taken out from mold.
3. one center injection molding according to claim 1 imitates glass mobile phone shell attaching process, it is characterised in that: described
Basic rupture pressure disc successively includes following material layer: PET protection film layer, OCA optical adhesive layer, PET base material layer and PET protection film layer；
The OCA optical adhesive layer thickness 25-50um, pulling capacity 20-30N；The PET base material is with a thickness of 50-75um.
4. one center injection molding according to claim 1 imitates glass mobile phone shell attaching process, it is characterised in that: this hair
The bright PVD plated film is non-conductive vacuum plated film, the PVD plated film specifically comprises the processes of: and hanger-vacuumizes-and material is pre-
Processing-ion sputtering film coating-deflation.
5. one center injection molding according to claim 1 imitates glass mobile phone shell attaching process, it is characterised in that: described
The processing step of 3D compression injection molding are as follows: material molten-upper mold-debugging-molding-injection filling-pressure maintaining molding-is cold
But-die sinking.
6. one center injection molding according to claim 5 imitates glass mobile phone shell attaching process, it is characterised in that: described
Transparent plastic is polymethyl methacrylate and/or polycarbonate;The temperature of the material molten is 210 250 DEG C, described
The injection pressure of injection filling is 80 130MPa, and injection time is 2 5S, and the molding pressure of pressure maintaining is 40 60MPa,
The pressure maintaining molding time is 2 10S.
7. one center injection molding according to claim 1 imitates glass mobile phone shell attaching process, it is characterised in that: hardening
Handling the hardening bath ingredient used includes urethane acrylate, and the time of hardening is 10 20s.
8. one center injection molding according to claim 1 imitates glass mobile phone shell attaching process, it is characterised in that: one
Fitting specifically includes:
(1) diaphragm and plastic parts are positioned, is then placed in the vacuum cavity of 3D make-up machine, vacuumizes, when vacuum degree reaches
140-160pa presses the upper cover moulding of jig, fits closely integrated center plastic parts with the explosion-proof diaphragm of 3D, then passes through
Pressure pressure maintaining movement is bonded the explosion-proof diaphragm of 3D and each position in inner cavity of integrated center plastic parts completely；
(2) material after fitting is taken out from jig, is put into vacuum degasing machine mesohigh deaeration；Deaeration parameter: vacuum degree-
90 ~ -100, pressure 16-18mpa, temperature: 60-70 °C, the time: 30-60min.
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| CN113781911A (en) * | 2021-09-08 | 2021-12-10 | 信利光电股份有限公司 | Method for repairing bubbles at edge of attaching piece |
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