CN210683612U - System for preparing composite cover plate - Google Patents
System for preparing composite cover plate Download PDFInfo
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- CN210683612U CN210683612U CN201921049948.0U CN201921049948U CN210683612U CN 210683612 U CN210683612 U CN 210683612U CN 201921049948 U CN201921049948 U CN 201921049948U CN 210683612 U CN210683612 U CN 210683612U
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Abstract
The utility model discloses a system for preparing composite cover plate, this system includes: the pretreatment unit is provided with a ceramic piece inlet and a pretreated ceramic piece outlet; the laser rough surface treatment device is provided with a plastic part inlet and a plastic part outlet after laser rough surface treatment; the laminating device is provided with a pretreated ceramic part inlet, an adhesive inlet, a laser rough surface treated plastic part inlet and a rough composite cover plate outlet, the pretreated ceramic part inlet is connected with the pretreated ceramic part outlet, and the laser rough surface treated plastic part inlet is connected with the laser rough surface treated plastic part outlet; and the post-processing unit is provided with a coarse composite cover plate inlet and a composite cover plate outlet, and the coarse composite cover plate inlet is connected with the coarse composite cover plate outlet. By adopting the system, the prepared composite cover plate has the appearance expressive force, wear resistance, drop resistance, heat dissipation and low electromagnetic shielding performance of the ceramic part, and also has the advantages of light weight and low cost of the plastic part, and the whole process is simple, easy to industrialize and low in manufacturing cost.
Description
Technical Field
The utility model belongs to compound apron field, particularly, the utility model relates to a system for preparing compound apron.
Background
The ceramic material has the characteristics of high hardness, good thermal shock resistance, good heat dissipation, high bending strength, good fracture toughness, strong wear resistance, good corrosion resistance and the like, and has the characteristics of beautiful appearance, smooth surface, luscious color and luster and the like, such as jade and the like, so that the ceramic material is popular with consumers. With the 5G communication standard shaping, the defect that the millimeter wave shielding effect of the metal shell is obvious is further amplified, and the once wind-solar infinite high-end mobile phone backboard market is quitted with a certain degree, so that a huge market space is reserved. Therefore, the application competition between 5G mobile phone backboard materials has also entered the acceleration stage.
The zirconia ceramic not only has the beauty, wear resistance, anti-falling performance, heat dispersion, dielectric constant, low electromagnetic shielding effect (namely 5G signal permeability) and the like of ceramic materials, but also has a phase change toughening mechanism and a thermal expansion coefficient which are relatively close to those of metal, and can be used as one of the first choices of shell materials of mobile phone back plates, intelligent wearing and the like.
As a conventional electronic consumer product, a mobile phone (including a tablet PC) has a light weight, low cost, and good appearance, which are very interesting for clients and consumers. At present, manufacturers mainly realize the following methods: (1) the plastic surface treatment is finished to improve the attractiveness of the product in a ceramic-like or glass-like manner; (2) the nano injection molding process (called NMT technology) completes the compounding of plastic and ceramics or glass, and the like, and achieves the purposes of low cost and light weight. Although the method (1) can improve the aesthetic degree, the quality and the like of the plastic shell, the market end is still positioned at a low-end product; although the method (2) well combines the characteristics of light plastic material, high ceramic quality and the like, the NMT technology at the present stage has high requirements on equipment and dies, so that the cost is high, and meanwhile, after the surface of the ceramic material is subjected to acid etching and T treatment, the surface appearance, crystalline phase, performance and the like of the ceramic material are influenced and damaged to a certain extent, so that the quality and yield of the appearance piece are greatly reduced, and the cost of the ceramic material is remarkably increased in order to obtain the appearance piece with better quality and yield.
Therefore, the existing technology for preparing the ceramic-plastic composite cover plate needs to be further improved.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. To this end, it is an object of the present invention to provide a system for manufacturing a composite cover plate. By adopting the system, the prepared composite cover plate has the appearance expressive force, wear resistance, drop resistance, heat dissipation and low electromagnetic shielding performance of the ceramic part, and also has the advantages of light weight and low cost of the plastic part, and the whole process is simple, easy to industrialize and low in manufacturing cost.
In an aspect of the present invention, the utility model provides a system for preparing composite cover plate, according to the utility model discloses an embodiment, this system includes:
a pre-treatment unit having a ceramic inlet and a pre-treated ceramic outlet;
the laser rough surface treatment device is provided with a plastic part inlet and a plastic part outlet after laser rough surface treatment;
the laminating device is provided with a pretreated ceramic part inlet, an adhesive inlet, a laser rough surface treated plastic part inlet and a rough composite cover plate outlet, the pretreated ceramic part inlet is connected with the pretreated ceramic part outlet, and the laser rough surface treated plastic part inlet is connected with the laser rough surface treated plastic part outlet;
the post-processing unit is provided with a coarse composite cover plate inlet and a composite cover plate outlet, and the coarse composite cover plate inlet is connected with the coarse composite cover plate outlet.
According to the system for preparing the composite cover plate, the ceramic piece is pretreated, so that the ceramic piece is protected, the ceramic piece is prevented from being damaged in the subsequent process, and meanwhile, impurities in the ceramic piece can be prevented from being brought into the subsequent process through pretreatment, so that the quality of the finally obtained composite cover plate is influenced; the laser rough surface treatment is carried out on the plastic part, so that the surface roughness of the rough surface side of the plastic part can be enhanced, and the binding force between the plastic part and the ceramic part in the subsequent attaching process is further improved; the pretreated ceramic part is attached to the rough surface side of the plastic part through the adhesive, and the rough surface side of the plastic part and the surface of the pretreated ceramic part have certain roughness, so that the adhesive can penetrate into the rough surface side of the plastic part and the hollow parts on the surface of the pretreated ceramic part, and an adhesive layer is formed on the rough surface side of the plastic part and the surface of the pretreated ceramic part, the adhesive layer can realize the adhesion between the pretreated ceramic part and the plastic part, and the rough surface side of the plastic part has larger surface roughness, so that the pretreated ceramic part and the post-plastic part have larger adhesive force; through carrying out aftertreatment with thick composite cover plate, be favorable to making the ceramic part among the thick composite cover plate and plastic part junction tracelessly change for composite cover plate is more pleasing to the eye. Therefore, by the preparation process, the prepared composite cover plate has the appearance expressive force, wear resistance, drop resistance, heat dissipation and low electromagnetic shielding performance of the ceramic part, and meanwhile, the composite cover plate also has the advantages of light weight and low cost of the plastic part, and the whole process is simple, easy to industrialize and low in manufacturing cost.
In addition, the system for preparing a composite cover plate according to the above embodiment of the present invention may further have the following additional technical features:
optionally, the pretreatment unit comprises a cleaning and degreasing device and a film sticking device which are connected.
Optionally, the pre-treatment unit further comprises a laser matte surface treatment device.
Optionally, the laser matte surface treatment device is a laser marking machine.
Optionally, the laminating device is a vacuum laminator.
Optionally, the post-treatment unit comprises a spraying device, a polishing device and a coating device which are connected in sequence.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a system for manufacturing a composite decking according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for manufacturing a composite cover plate according to an embodiment of the present invention, wherein the system for manufacturing a composite cover plate is described above;
fig. 3 is a schematic view of the composite cover plate obtained in example 1 of the present invention;
fig. 4 is a schematic view of the composite cover plate obtained in embodiment 2 of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In an aspect of the present invention, the utility model provides a system for preparing composite cover plate, according to the utility model discloses an embodiment, refer to fig. 1, this system includes: a pretreatment unit 100, a laser matte surface treatment device 200, a bonding device 300 and a post-treatment unit 400.
According to an embodiment of the present invention, the pre-treatment unit 100 has a ceramic inlet 101 and a pre-treated ceramic outlet 102, and is adapted to pre-treat the ceramic. According to an embodiment of the present invention, the type of the specific items of the pretreatment is not particularly limited, and those skilled in the art can select the pretreatment according to actual needs, for example, the pretreatment may include a cleaning and degreasing device and a film pasting device connected to each other. Further, a drying device can be further included. Further, a laser matte surface treatment device can be included in the process of pretreating the ceramic piece. It should be noted that, the specific cleaning and degreasing device, the film pasting device, the drying device and the laser matte surface treatment device are not particularly limited, and those skilled in the art can select them according to actual needs, for example, the film pasting device may be a vacuum film pasting machine. The connection relationship between the devices is not particularly limited, and those skilled in the art can arrange the devices to be used according to actual needs. The inventor finds that the residual oil stain on the surface of the ceramic piece can be removed by carrying out oil removal treatment on the ceramic piece, so that the subsequent bonding effect of the ceramic piece and the plastic piece is prevented from being influenced; impurities on the surface of the attachment surface of the ceramic piece can be removed by cleaning the ceramic piece, so that the bonding effect of the ceramic piece and the plastic piece is further improved; after drying, the liquid left after cleaning can be removed; the high-temperature protective film is pasted on the non-adhesion surface, so that the non-adhesion surface can be prevented from damaging the ceramic piece due to overhigh temperature of the pasting device in the subsequent pasting process; through carrying out laser matte treatment to ceramic member, be favorable to improving the roughness of ceramic member, increase in the follow-up laminating in-process and the laminating effect of laser matte treatment back plastic part. The ceramic part is pretreated, so that protective measures are favorably carried out on the ceramic part, the ceramic part is prevented from being damaged in subsequent processes, and meanwhile, impurities in the ceramic part can be prevented from being brought into the subsequent processes through pretreatment, so that the quality of the finally obtained composite cover plate is influenced. Specifically, the ceramic part is obtained by subjecting a ceramic sintering blank to CNC (computerized numerical control), grinding and polishing, fine polishing and punching, and meets the requirements of subsequent processes. The shape of the ceramic member is not particularly limited, and may be selected by those skilled in the art according to actual needs, and may be, for example, 2D, 2.5D, or 3D.
According to the utility model discloses a specific embodiment, clean deoiling device cleans the deoiling and handles and specifically can include: the ceramic piece to be cleaned is put into an ultrasonic cleaning machine filled with NaOH (PH: 9-11; temperature: 95 +/-5 ℃) solution for soaking (frequency: 40 kHz; time: 60 +/-10 s), then is subjected to spray cleaning (temperature: 80 +/-5 ℃ and time: 60 +/-10 s), then is subjected to ultrasonic cleaning (frequency: 40 kHz; time: 60 +/-10 s) by pure water, and finally is subjected to hot air drying (temperature: 125 +/-5 ℃ and time: 120 +/-10 s) to finish cleaning and oil removal. The film sticking treatment may specifically include: 1) preparing 50% ethanol solution and high temperature resistant membrane; 2) and (3) inspection and cleaning: cleaning the ceramic piece and checking whether the ceramic piece is qualified; 3) wetting: uniformly spraying a fog layer on the surface of the ceramic piece which is qualified in cleaning by using a sprayer; 4) moistening and sticking a film: the protective film on the film is separated from the sticking film, and a fog layer is also sprayed on the adhesive surface of the sticking film, so that the sticking film can be conveniently moved and the position can be conveniently adjusted when the sticking film is stuck; 5) film pasting: attaching the wetted pad pasting to the wetted surface of the ceramic part, and adjusting the position of the pad pasting; 6) film scraping: scraping out water to make it bubble-free; 7) standing, curing and drying: the film pasting workpiece is placed in a vacuum laminating machine, and the vacuum degree, the temperature and the pressure maintaining time are respectively set as follows: -0.90MPa, 60 ℃ and 10 min.
According to another embodiment of the present invention, the ceramic member may be made of at least one selected from zirconia ceramics, ZTA composite ceramics containing 15 to 20 wt% of alumina, and alumina ceramics. The inventor finds that the ceramic piece not only has the beauty degree, the wear resistance, the anti-falling performance, the heat dissipation performance, the dielectric constant, the low electromagnetic shielding effect (namely 5G signal permeability) and the like of the ceramic material, but also has a phase change toughening mechanism and a thermal expansion coefficient which are relatively close to those of metal, and can be used as one of the first choices of shell materials of mobile phone back plates, intelligent wearing and the like.
According to a further embodiment of the invention, the thickness of the ceramic element may be 0.2-0.5mm, for example 0.2mm, 0.25mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.5 mm. Hair-like deviceIt has been found that the zirconia ceramic matrix has a relatively high density (theoretical value > 6.0 g/cm)3) The thickness directly affects the light weight of the product, but when the thickness is too thin (< 0.2mm) and the area is large (e.g. 150mm x 70mm), the comprehensive properties such as the anti-falling property and the anti-bending property are greatly reduced.
According to the utility model discloses an embodiment, laser matte surface processing apparatus 200 has plastic part entry 201 and laser matte surface and handles back plastic part export 202, and is suitable for and carries out laser matte surface to at least some of plastic part and handle. Specifically, the method comprises the following steps: and placing the plastic part to be subjected to laser treatment on a positioning jig, opening vacuum adsorption, and setting laser parameters (frequency: 15-35kHz, speed of 100-300mm/s) and a marking area to start to perform the surface marking rough surface treatment on the plastic part. It should be noted that the specific type of the laser matte surface processing device is not particularly limited, and those skilled in the art can select the laser matte surface processing device according to actual needs, such as a laser marking machine (ultraviolet). The inventor finds that the surface roughness of the plastic part can be enhanced by performing laser rough surface treatment on the plastic part, so that the binding force between the plastic part and the pretreated ceramic part in the subsequent bonding process is improved. Wherein, the plastic part can be a plastic part prepared by an injection molding process.
According to an embodiment of the present invention, the plastic part may contain 0-40 wt% of glass fiber, for example, the glass fiber content is 0 wt%, 1 wt%, 5 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%. The inventor finds that plastic granules containing 0-40 wt% of glass fiber have good fluidity in a molten state, the adjustment range of injection molding process parameters is wide, the requirements of mold structure design and the like are not strict, and the defect rate of injection molding workpieces is low. Meanwhile, the surface post-treatment finish of the plastic part workpiece is relatively good, and excessive fiber floating is avoided. According to an embodiment of the present invention, the plastic part can be at least one of PC, PP, ABS and PBT. The inventor finds that the plastic parts of PC, PP, ABS and PBT have the characteristics of high mechanical strength, good toughness, good heat resistance and weather resistance, high dimensional stability, easy coloring, low water absorption and the like.
According to another embodiment of the present invention, the bottom thickness of the plastic part can be 0.2-0.5mm, for example, 0.2mm, 0.3mm, 0.4mm, 0.5 mm. The bottom thickness refers to the thickness of the contact part between the plastic part and the ceramic part. The inventor finds that if the bottom thickness of the plastic part is too low, the structural strength of the plastic part is low, the plastic part cannot support the structural performance of the middle frame and protect the ceramic workpiece, and the plastic part is easy to deform, so that the overall assembly is influenced. If the bottom thickness of the plastic part is too high, the above defects can be avoided, but the design concept of light weight and miniaturization of the 3C structural part is not met.
According to another embodiment of the present invention, the rough surface of the plastic part has a surface roughness Ra of 30.0-60.0nm, such as 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, and the inventors found that if the surface roughness of the plastic part is too low after the laser rough surface treatment, the subsequent bonding is adversely affected, the bonding force between the plastic part and the ceramic part is reduced, and the quality of the composite cover plate is further reduced; if the surface roughness of the plastic part after the laser rough surface treatment is too high, the cost of the laser rough surface treatment is obviously increased, and meanwhile, the improvement of the quality of the composite cover plate due to the improvement of the roughness of the plastic part is not obvious any more.
According to the utility model discloses an embodiment, laminating device 300 has ceramic member entry 301 after the preliminary treatment, adhesive entry 302, laser matte surface handles back plastic part entry 303 and thick compound apron export 304, ceramic member entry 301 links to each other with ceramic member export 102 after the preliminary treatment, laser matte surface handles back plastic part entry 303 and laser matte surface and handles back export 202 and link to each other, and be suitable for and laminate the processing with the matte side of ceramic member and plastic member after the preliminary treatment under the effect of adhesive, so as to obtain thick compound apron. It should be noted that the specific type of the applying device is not particularly limited, and those skilled in the art can select the type according to actual needs, for example, a vacuum applying machine can be used. Specifically, an adhesive is uniformly coated on the surface of the pretreated ceramic part or the surface of the plastic part after laser rough surface treatment through a dispenser, then the rough surface side of the plastic part or the attachment surface of the pretreated ceramic part is placed on the surface of the pretreated ceramic part or the surface of the plastic part after laser rough surface treatment after coating the adhesive through a clamp, and the rough composite cover plate is obtained through bonding treatment. The bonding process may be a vacuum bonding process. The inventor finds that by attaching the pretreated ceramic part to the rough surface side of the plastic part through the adhesive, the adhesive can penetrate into the rough surface side of the plastic part and the hollow part on the surface of the pretreated ceramic part due to certain roughness of the rough surface side of the plastic part and the surface of the pretreated ceramic part, and an adhesive layer is formed on the rough surface side of the plastic part and the surface of the pretreated ceramic part, so that the adhesive layer can realize adhesion between the pretreated ceramic part and the plastic part, and the rough surface side of the plastic part has larger surface roughness, so that the pretreated ceramic part and the plastic part have larger adhesive force. Furthermore, the adhesion under the vacuum condition is favorable for removing trapped air in glue and the adhesion part, and the adhesion strength is enhanced; meanwhile, the molten liquid glue is favorably spread and overflowed on the whole contact surface, and the thickness and consistency of the glue layer are better ensured.
According to an embodiment of the utility model, the colour of plastic part is unanimous with the colour of ceramic part. Thus, the appearance integrity of the obtained composite cover plate can be better.
According to yet another embodiment of the present invention, the adhesive may be at least one selected from TPU, EVA, PA. The inventor finds that the adhesive belongs to thermosetting glue, and plastic change can not occur after high-temperature curing; meanwhile, the adhesive has good adhesive property with ceramic materials and high drawing strength, and meets the product performance requirements of a 3C structure.
According to another embodiment of the present invention, the temperature of the bonding treatment may be 105-115 ℃, for example, 105 ℃, 107 ℃, 109 ℃, 111 ℃, 113 ℃, 115 ℃, and the pressure may be-1.05 to-0.75 MPa, for example, -1.05MPa, -1.00MPa, -0.95MPa, -0.90MPa, -0.85MPa, -0.80MPa, -0.75MPa, and the time may be 15 to 20s, for example, 15s, 16s, 17s, 18s, 19s, 20 s. The inventor finds that if the temperature and the time of the bonding treatment are too high and too long, the colloid is easy to age, and the bonding strength is influenced; on the other hand, the melting point of the adhesive film is not reached, and the adhesive bonding strength is not optimal. The pressure of the bonding treatment mainly influences the air trapping at the joint and the uniformity of the adhesive film, when the pressure is too low, the air trapping is easy to remain at the joint, and meanwhile, the adhesive film cannot be well ensured to be better spread and overflowed on the whole contact surface in a molten state, so that the uniformity and the thickness of the adhesive film are not controlled favorably.
According to the utility model discloses an embodiment, aftertreatment unit 400 has thick composite cover board entry 401 and composite cover board export 402, and thick composite cover board entry 401 links to each other with thick composite cover board export 304, and is suitable for and carries out the aftertreatment to thick composite cover board to obtain composite cover board. According to an embodiment of the present invention, the type of the post-processing unit is not particularly limited, and those skilled in the art can select the post-processing unit according to actual needs, for example, the post-processing unit may include a spraying device, a polishing device and a coating device which are connected in sequence. The specific spraying device, polishing device and coating device are not particularly limited, and those skilled in the art can select the spraying device, polishing device and coating device according to actual needs, for example, the spraying device can be a UV varnish spraying machine, the polishing device can be a sweeping machine, and the coating device can be a vacuum coating machine. Specifically, the spraying may include a: preheating a coarse composite cover plate, wherein the preheating temperature is generally controlled to be 45-55 ℃; the thickness of a single coating film is controlled to be 30-35um, the thickness of a double-coated primer is 25-30um, and the thickness of a finish paint is 5-10 um; after film forming, baking and spraying, the product needs to be baked and cured to form a compact ceramic coating film. The baking of the sprayed product is divided into two stages: a low-temperature surface drying stage and a high-temperature baking and curing stage, and a compact paint film is formed on a product after baking and curing. The polishing may include: polishing treatment was carried out using a polishing pad and an S20 polishing medium with a pressure, a rotation speed and a duty cycle of the apparatus turntable of 150kg, 20rpm and 200min, respectively. The coating may include: material → cleaning → spraying/silk-screen sensitive ink (film thickness 10-15um) → baking (temperature 60 + -5 degree, baking time 5-10min) → film exposure (energy 30-80 mj/cm)3And time: 3-5s) → development (alkali solvent development concentration: 0.5-0.8% of Na2CO3The solution is etched in an acidic solvent for 3-10s → removed film in an alkaline solvent for 30 +/-2 ℃ for 25-45s → cleaned in pure water → finished product. The inventor finds that the ceramic part and the plastic part can be combined through spraying treatmentThe spraying covering treatment of the joint surface can realize the mirror effect of the surface of the composite cover plate and the traceless effect of the joint of the ceramic part and the plastic part through the polishing treatment, and the appearance expressive force of the composite cover plate can be further improved through film coating. Namely, the rough composite cover plate is subjected to post-treatment, so that the joint of the ceramic part and the plastic part in the rough composite cover plate is free of marks, and the composite cover plate is more attractive.
According to the system for preparing the composite cover plate, the ceramic piece is pretreated, so that the ceramic piece is protected, the ceramic piece is prevented from being damaged in the subsequent process, and meanwhile, impurities in the ceramic piece can be prevented from being brought into the subsequent process through pretreatment, so that the quality of the finally obtained composite cover plate is influenced; the laser rough surface treatment is carried out on the plastic part, so that the surface roughness of the rough surface side of the plastic part can be enhanced, and the binding force between the plastic part and the ceramic part in the subsequent attaching process is further improved; the pretreated ceramic part is attached to the rough surface side of the plastic part through the adhesive, and the rough surface side of the plastic part and the surface of the pretreated ceramic part have certain roughness, so that the adhesive can penetrate into the rough surface side of the plastic part and the hollow parts on the surface of the pretreated ceramic part, and an adhesive layer is formed on the rough surface side of the plastic part and the surface of the pretreated ceramic part, the adhesive layer can realize the adhesion between the pretreated ceramic part and the plastic part, and the rough surface side of the plastic part has larger surface roughness, so that the pretreated ceramic part and the post-plastic part have larger adhesive force; through carrying out aftertreatment with thick composite cover plate, be favorable to making the ceramic part among the thick composite cover plate and plastic part junction tracelessly change for composite cover plate is more pleasing to the eye. Therefore, by the preparation process, the prepared composite cover plate has the appearance expressive force, wear resistance, drop resistance, heat dissipation and low electromagnetic shielding performance of the ceramic part, and meanwhile, the composite cover plate also has the advantages of light weight and low cost of the plastic part, and the whole process is simple, easy to industrialize and low in manufacturing cost.
For convenience of understanding, a method for manufacturing a composite cover plate using the system for manufacturing a composite cover plate described above will be described in detail below, and according to an embodiment of the present invention, with reference to fig. 2, the method includes:
s100: pretreating the ceramic part
In this step, the ceramic piece is pretreated, according to an embodiment of the present invention, the type of the pretreated item is not particularly limited, and those skilled in the art can select the pretreated item according to actual needs, for example, the pretreatment may include cleaning, degreasing and film-sticking treatment. Further, the ceramic piece may be subjected to degreasing, cleaning, drying and treatment of attaching a high-temperature protective film to the non-attachment surface. Further, laser roughening may be included in the pre-treatment of the ceramic part. The inventor finds that the residual oil stain on the surface of the ceramic piece can be removed by carrying out oil removal treatment on the ceramic piece, so that the subsequent bonding effect of the ceramic piece and the plastic piece is prevented from being influenced; impurities on the surface of the attachment surface of the ceramic piece can be removed by cleaning the ceramic piece, so that the bonding effect of the ceramic piece and the plastic piece is further improved; after drying, the liquid left after cleaning can be removed; the high-temperature protective film is pasted on the non-adhesion surface, so that the non-adhesion surface can be prevented from damaging the ceramic piece due to overhigh temperature of the pasting device in the subsequent pasting process; through carrying out laser matte treatment to ceramic member, be favorable to improving the roughness of ceramic member, increase in the follow-up laminating in-process and the laminating effect of laser matte treatment back plastic part. The ceramic part is pretreated, so that protective measures are favorably carried out on the ceramic part, the ceramic part is prevented from being damaged in subsequent processes, and meanwhile, impurities in the ceramic part can be prevented from being brought into the subsequent processes through pretreatment, so that the quality of the finally obtained composite cover plate is influenced. Specifically, the ceramic part is obtained by subjecting a ceramic sintering blank to CNC (computerized numerical control), grinding and polishing, fine polishing and punching, and meets the requirements of subsequent processes. The shape of the ceramic member is not particularly limited, and may be selected by those skilled in the art according to actual needs, and may be, for example, 2D, 2.5D, or 3D.
According to the utility model discloses a specific embodiment, clean deoiling is handled and specifically can include: the ceramic piece to be cleaned is put into an ultrasonic cleaning machine filled with NaOH (PH: 9-11; temperature: 95 +/-5 ℃) solution for soaking (frequency: 40 kHz; time: 60 +/-10 s), then is subjected to spray cleaning (temperature: 80 +/-5 ℃ and time: 60 +/-10 s), then is subjected to ultrasonic cleaning (frequency: 40 kHz; time: 60 +/-10 s) by pure water, and finally is subjected to hot air drying (temperature: 125 +/-5 ℃ and time: 120 +/-10 s) to finish cleaning and oil removal. The film sticking treatment may specifically include: 1) preparing 50% ethanol solution and high temperature resistant membrane; 2) cleaning the ceramic piece and checking whether the ceramic piece is qualified; 3) uniformly spraying a fog layer on the surface of the ceramic piece which is qualified in cleaning by using a sprayer; 4) the protective film on the film is separated from the sticking film, and a fog layer is also sprayed on the adhesive surface of the sticking film, so that the sticking film can be conveniently moved and the position can be conveniently adjusted when the sticking film is stuck; 5) attaching the wetted pad pasting to the wetted surface of the ceramic part, and adjusting the position of the pad pasting; 6) scraping out water to make it bubble-free; 7) the film pasting workpiece is placed in a vacuum laminating machine, and the vacuum degree, the temperature and the pressure maintaining time are respectively set as follows: 0.90MPa, 60 ℃ and 10 min.
According to another embodiment of the present invention, the ceramic member may be made of at least one selected from zirconia ceramics, ZTA composite ceramics containing 15 to 20 wt% of alumina, and alumina ceramics. The inventor finds that the ceramic piece not only has the beauty degree, the wear resistance, the anti-falling performance, the heat dissipation performance, the dielectric constant, the low electromagnetic shielding effect (namely 5G signal permeability) and the like of the ceramic material, but also has a phase change toughening mechanism and a thermal expansion coefficient which are relatively close to those of metal, and can be used as one of the first choices of shell materials of mobile phone back plates, intelligent wearing and the like.
According to a further embodiment of the invention, the thickness of the ceramic element may be 0.2-0.5mm, for example 0.2mm, 0.25mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.5 mm. The inventors have found that zirconia ceramic matrices have a relatively high density (> 6.0g/cm theoretical value)3) The thickness directly affects the light weight of the product, but when the thickness is too thin (< 0.2mm) and the area is large (e.g. 150mm x 70mm), the comprehensive properties such as the anti-falling property and the anti-bending property are greatly reduced.
S200: at least one part of the plastic part is subjected to laser matte surface treatment
In this step, carry out laser matte to the plastic part and handle, specific: and placing the plastic part to be subjected to laser treatment on a positioning jig, opening vacuum adsorption, and setting laser parameters (frequency: 15-35kHz, speed of 100-300mm/s) and a marking area to start to perform the surface marking rough surface treatment on the plastic part. The inventor finds that the surface roughness of the plastic part can be enhanced by performing laser rough surface treatment on the plastic part, so that the binding force between the plastic part and the pretreated ceramic part in the subsequent bonding process is improved. Wherein, the plastic part can be a plastic part prepared by an injection molding process.
According to an embodiment of the present invention, the plastic part may contain 0-40 wt% of glass fiber, for example, the glass fiber content is 0 wt%, 1 wt%, 5 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%. The inventor finds that plastic granules containing 0-40 wt% of glass fiber have good fluidity in a molten state, the adjustment range of injection molding process parameters is wide, the requirements of mold structure design and the like are not strict, and the defect rate of injection molding workpieces is low. Meanwhile, the surface post-treatment finish of the plastic part workpiece is relatively good, and excessive fiber floating is avoided. According to an embodiment of the present invention, the plastic part can be at least one of PC, PP, ABS and PBT. The inventor finds that the plastic parts of PC, PP, ABS and PBT have the characteristics of high mechanical strength, good toughness, good heat resistance and weather resistance, high dimensional stability, easy coloring, low water absorption and the like.
According to another embodiment of the present invention, the bottom thickness of the plastic part can be 0.2-0.5mm, for example, 0.2mm, 0.3mm, 0.4mm, 0.5 mm. The bottom thickness refers to the thickness of the contact part between the plastic part and the ceramic part. The inventor finds that if the bottom thickness of the plastic part is too low, the structural strength of the plastic part is low, the plastic part cannot support the structural performance of the middle frame and protect the ceramic workpiece, and the plastic part is easy to deform, so that the overall assembly is influenced. If the bottom thickness of the plastic part is too high, the above defects can be avoided, but the design concept of light weight and miniaturization of the 3C structural part is not met.
According to another embodiment of the present invention, the rough surface of the plastic part may have a surface roughness Ra of 30.0 to 60.0nm, for example, 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, or 60 nm. The inventor finds that if the surface roughness of the plastic part after laser rough surface treatment is too low, the subsequent bonding is adversely affected, the adhesive force between the plastic part and the ceramic part is reduced, and the quality of the composite cover plate is further reduced; if the surface roughness of the plastic part after the laser rough surface treatment is too high, the cost of the laser rough surface treatment is obviously increased, and meanwhile, the improvement of the quality of the composite cover plate due to the improvement of the roughness of the plastic part is not obvious any more.
S300: bonding the pretreated ceramic part obtained in the step S100 with the rough surface side of the plastic part obtained in the step S200 through an adhesive
In this step, the pretreated ceramic part obtained in S100 is bonded to the rough surface side of the plastic part obtained in S200 with an adhesive, so as to obtain a rough composite cover plate. Specifically, an adhesive is uniformly coated on the surface of the pretreated ceramic part or the surface of the plastic part after laser rough surface treatment through a dispenser, then the rough surface side of the plastic part or the attachment surface of the pretreated ceramic part is placed on the surface of the pretreated ceramic part or the surface of the plastic part after laser rough surface treatment after coating the adhesive through a clamp, and the rough composite cover plate is obtained through bonding treatment. The bonding process may be a vacuum bonding process. The inventor finds that by attaching the pretreated ceramic part to the rough surface side of the plastic part through the adhesive, the adhesive can penetrate into the rough surface side of the plastic part and the hollow part on the surface of the pretreated ceramic part due to certain roughness of the rough surface side of the plastic part and the surface of the pretreated ceramic part, and an adhesive layer is formed on the rough surface side of the plastic part and the surface of the pretreated ceramic part, so that the adhesive layer can realize adhesion between the pretreated ceramic part and the plastic part, and the rough surface side of the plastic part has larger surface roughness, so that the pretreated ceramic part and the plastic part have larger adhesive force. Furthermore, the adhesion under the vacuum condition is favorable for removing trapped air in glue and the adhesion part, and the adhesion strength is enhanced; meanwhile, the molten liquid glue is favorably spread and overflowed on the whole contact surface, and the thickness and consistency of the glue layer are better ensured.
According to an embodiment of the utility model, the colour of plastic part is unanimous with the colour of ceramic part. Thus, the appearance integrity of the obtained composite cover plate can be better.
According to yet another embodiment of the present invention, the adhesive may be at least one selected from TPU, EVA, PA. The inventor finds that the adhesive belongs to thermosetting glue, and plastic change can not occur after high-temperature curing; meanwhile, the adhesive has good adhesive property with ceramic materials and high drawing strength, and meets the product performance requirements of a 3C structure.
According to another embodiment of the present invention, the temperature of the bonding treatment may be 105-115 ℃, for example, 105 ℃, 107 ℃, 109 ℃, 111 ℃, 113 ℃, 115 ℃, and the pressure may be-1.05 to-0.75 MPa, for example, -1.05MPa, -1.00MPa, -0.95MPa, -0.90MPa, -0.85MPa, -0.80MPa, -0.75MPa, and the time may be 15 to 20s, for example, 15s, 16s, 17s, 18s, 19s, 20 s. The inventor finds that if the temperature and the time of the bonding treatment are too high and too long, the colloid is easy to age, and the bonding strength is influenced; on the other hand, the melting point of the adhesive film is not reached, and the adhesive bonding strength is not optimal. The pressure of the bonding treatment mainly influences the air trapping at the joint and the uniformity of the adhesive film, when the pressure is too low, the air trapping is easy to remain at the joint, and meanwhile, the adhesive film cannot be well ensured to be better spread and overflowed on the whole contact surface in a molten state, so that the uniformity and the thickness of the adhesive film are not controlled favorably.
S400: post-treating the coarse composite cover plate
In this step, the rough composite cover plate is post-processed to obtain a composite cover plate. According to an embodiment of the present invention, the post-treatment may include spraying, polishing, and coating in sequence. Specifically, the spraying may include a: preheating a coarse composite cover plate, wherein the preheating temperature is generally controlled to be 45-55 ℃; the thickness of a single coating film is controlled to be 30-35um, the thickness of a double-coated primer is 25-30um, and the thickness of a finish paint is 5-10 um; after film forming, baking and spraying, the product needs to be baked and cured to form a compact ceramic coating film. The baking of the sprayed product is divided into two stages: a low-temperature surface drying stage and a high-temperature baking and curing stage, and a compact paint film is formed on a product after baking and curing. The polishing may include: polishing treatment was carried out using a polishing pad and an S20 polishing medium with a pressure, a rotation speed and a duty cycle of the apparatus turntable of 150kg, 20rpm and 200min, respectively. The coating may include: material → cleaning → spraying/screen printing photosensitive ink (film thickness 10-15um) → baking (temperature 60 ±)5 degree, baking time 5-10min) → film exposure (energy 30-80 mj/cm)3And time: 3-5s) → development (alkali solvent development concentration: 0.5-0.8% of Na2CO3The solution is etched in an acidic solvent for 3-10s → removed film in an alkaline solvent for 30 +/-2 ℃ for 25-45s → cleaned in pure water → finished product. The inventor finds that the spraying covering treatment of the surface of the joint of the ceramic part and the plastic part can be completed through the spraying treatment, the mirror surface effect of the surface of the composite cover plate and the traceless effect of the joint of the ceramic part and the plastic part can be realized through the polishing treatment, and the appearance expressive force of the composite cover plate can be further improved through the film coating. Namely, the rough composite cover plate is subjected to post-treatment, so that the joint of the ceramic part and the plastic part in the rough composite cover plate is free of marks, and the composite cover plate is more attractive.
According to the utility model discloses the method of preparation composite cover plate, through carrying out the preliminary treatment to ceramic member, be favorable to protecting ceramic member, avoid ceramic member impaired in follow-up process, through the preliminary treatment simultaneously, can avoid the impurity in the ceramic member to bring into follow-up process, influence the quality of finally gained composite cover plate; the laser rough surface treatment is carried out on the plastic part, so that the surface roughness of the rough surface side of the plastic part can be enhanced, and the binding force between the plastic part and the ceramic part in the subsequent attaching process is further improved; the pretreated ceramic part is attached to the rough surface side of the plastic part through the adhesive, and the rough surface side of the plastic part and the surface of the pretreated ceramic part have certain roughness, so that the adhesive can penetrate into the rough surface side of the plastic part and the hollow parts on the surface of the pretreated ceramic part, and an adhesive layer is formed on the rough surface side of the plastic part and the surface of the pretreated ceramic part, the adhesive layer can realize the adhesion between the pretreated ceramic part and the plastic part, and the rough surface side of the plastic part has larger surface roughness, so that the pretreated ceramic part and the post-plastic part have larger adhesive force; through carrying out aftertreatment with thick composite cover plate, be favorable to making the ceramic part among the thick composite cover plate and plastic part junction tracelessly change for composite cover plate is more pleasing to the eye. Therefore, by the preparation process, the prepared composite cover plate has the appearance expressive force, wear resistance, drop resistance, heat dissipation and low electromagnetic shielding performance of the ceramic part, and meanwhile, the composite cover plate also has the advantages of light weight and low cost of the plastic part, and the whole process is simple, easy to industrialize and low in manufacturing cost.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
Selecting a 2D ceramic piece with specification of 146.00 multiplied by 64.40 multiplied by 0.5mm and processed at the C-angle at the edge, wherein the ceramic piece is a zirconia ceramic piece, soaking the ceramic piece in an ultrasonic cleaning machine containing NaOH (PH: 9-11; temperature: 95 +/-5 ℃) solution (frequency: 40kHz, time 60 +/-10 s), then spraying and cleaning (temperature: 80 +/-5 ℃ and time 60 +/-10 s), then carrying out ultrasonic cleaning by using pure water (frequency: 40kHz, time 60 +/-10 s), finally carrying out hot air drying (temperature: 125 +/-5 ℃ and time 120 +/-10 s), then cleaning and removing oil, and pasting a high-temperature protective film on the non-attached surface of the ceramic piece to obtain a pretreated ceramic piece; selecting a plastic part with the specification of 154.40 multiplied by 72.40 multiplied by 6.60mm, the sinking platform depth of 0.45mm and the bottom thickness of 0.35mm, wherein the plastic part is made of a PC plastic part containing 30 wt% of glass fibers, the color of the plastic part is consistent with that of the ceramic part, performing laser rough surface treatment on the plastic part, and cleaning and drying to obtain a rough surface side plastic part with the surface roughness Ra of 30.0 nm; bonding the pretreated ceramic part with the rough surface side of the plastic part through an adhesive EVA for 20s at the temperature of 110 ℃, under the pressure of-0.90 MPa to obtain a coarse composite cover plate; carry out the spraying to the plastic part and the ceramic part laminating department of thick compound apron, include: preheating at 45-55 deg.C; single coating film thickness standard: 30-35um, double priming: 25-30um, 5-10um finish; after spraying, baking and curing are carried out to form a compact ceramic coating film, and the baking of a sprayed product is divided into two stages: a low-temperature surface drying stage and a high-temperature baking and curing stage, and a compact paint film is formed on a product after baking and curing. Then, a polishing process is performed, including: polishing with polishing pad and S20 grinding medium under the conditions of equipment turntable pressure, rotation speed and duty cycle of 150kg, 20rpm and 200min, respectively, and performing coarse compoundingThe cover plate is subjected to film coating treatment, and the method comprises the following steps: material → cleaning → spraying/silk-screen sensitive ink (film thickness 10-15um) → baking (temperature 60 + -5 degree, baking time 5-10min) → film exposure (energy 30-80 mj/cm)3And time: 3-5s) → development (alkali solvent development concentration: 0.5-0.8% of Na2CO3The solution, temperature 30 ± 2 ℃, time 25-45s) → etching (acid solvent etching time 3-10s) → stripping (alkaline solvent stripping, temperature 30 ± 2 ℃, time 60-120s) → pure water cleaning → finish product, and a composite cover plate is obtained, and the composite cover plate is shown in fig. 3.
Example 2
Selecting a 2D ceramic piece with specification of 146.00 multiplied by 64.40 multiplied by 0.5mm, processed at the edge by a C angle and punched in the middle, wherein the ceramic piece is a zirconia ceramic piece, soaking the ceramic piece in an ultrasonic cleaning machine filled with NaOH (PH: 9-11; temperature: 95 +/-5 ℃) solution (frequency: 40kHz, time: 60 +/-10 s), spraying and cleaning (temperature: 80 +/-5 ℃ and time: 60 +/-10 s), ultrasonically cleaning with pure water (frequency: 40kHz, time: 60 +/-10 s), drying with hot air (temperature: 125 +/-5 ℃ and time: 120 +/-10 s) to finish cleaning and oil removal, and attaching a high-temperature protective film on the non-attachment surface of the ceramic piece to obtain a pretreated ceramic piece; selecting a plastic part with the specification of 154.40 multiplied by 72.40 multiplied by 6.60mm, the sinking platform depth of 0.45mm and the bottom thickness of 0.4mm, wherein the plastic part is made of a PC plastic part containing 30 wt% of glass fiber, the color of the plastic part is consistent with that of the ceramic part, performing laser rough surface treatment on the plastic part, and cleaning and drying to obtain a rough surface side plastic part with the surface roughness Ra of 30.0 nm; bonding the pretreated ceramic part with the rough surface side of the plastic part through an adhesive EVA for 20s at the temperature of 110 ℃, under the pressure of-0.90 MPa to obtain a coarse composite cover plate; spraying the joint of the plastic part and the ceramic part of the coarse composite cover plate, including preheating, wherein the preheating temperature is controlled to be 45-55 ℃; single coating film thickness standard: 30-35um, double priming: 25-30um, 5-10um finish; after spraying, baking and curing are carried out to form a compact ceramic coating film, and the baking of a sprayed product is divided into two stages: a low-temperature surface drying stage and a high-temperature baking and curing stage, and a compact paint film is formed on a product after baking and curing. Then, a polishing process is performed, including: polishing treatment is carried out by using a polishing pad and an S20 grinding medium, wherein the pressure, the rotating speed and the working period of an equipment turntable are respectively 150kg, 20rpm and 200min, and coating treatment is carried out on the whole rough composite cover plate, and the method comprises the following steps: performing PVD coating at 25 ℃ and room temperature in a cycle period of 50min to obtain a composite cover plate, wherein the composite cover plate is shown in figure 4.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (6)
1. A system for making a composite deck, comprising:
a pre-treatment unit having a ceramic inlet and a pre-treated ceramic outlet;
the laser rough surface treatment device is provided with a plastic part inlet and a plastic part outlet after laser rough surface treatment;
the laminating device is provided with a pretreated ceramic part inlet, an adhesive inlet, a laser rough surface treated plastic part inlet and a rough composite cover plate outlet, the pretreated ceramic part inlet is connected with the pretreated ceramic part outlet, and the laser rough surface treated plastic part inlet is connected with the laser rough surface treated plastic part outlet;
the post-processing unit is provided with a coarse composite cover plate inlet and a composite cover plate outlet, and the coarse composite cover plate inlet is connected with the coarse composite cover plate outlet.
2. The system for manufacturing a composite cover plate according to claim 1, wherein the pretreatment unit comprises a cleaning and degreasing device and a film sticking device which are connected.
3. The system for manufacturing a composite deck according to claim 1 or 2, wherein the pre-treatment unit further comprises a laser matte treatment device.
4. The system for making a composite cover sheet of claim 1 wherein said laser matte finishing device is a laser marking machine.
5. The system for making a composite decking in accordance with claim 1 wherein the laminating apparatus is a vacuum laminator.
6. The system for preparing a composite cover plate according to claim 1, wherein the post-processing unit comprises a spraying device, a polishing device and a coating device which are connected in sequence.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357649A (en) * | 2019-07-05 | 2019-10-22 | 深圳陶陶科技有限公司 | Composite decking and preparation method thereof and system |
| WO2024021199A1 (en) * | 2022-07-29 | 2024-02-01 | 上海泽丰半导体科技有限公司 | Laser drilling method for green ceramic sheet |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357649A (en) * | 2019-07-05 | 2019-10-22 | 深圳陶陶科技有限公司 | Composite decking and preparation method thereof and system |
| WO2024021199A1 (en) * | 2022-07-29 | 2024-02-01 | 上海泽丰半导体科技有限公司 | Laser drilling method for green ceramic sheet |
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