CN114043756A - Manufacturing method of double-sided laminated composite board - Google Patents
Manufacturing method of double-sided laminated composite board Download PDFInfo
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- CN114043756A CN114043756A CN202111549509.8A CN202111549509A CN114043756A CN 114043756 A CN114043756 A CN 114043756A CN 202111549509 A CN202111549509 A CN 202111549509A CN 114043756 A CN114043756 A CN 114043756A
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- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000004831 Hot glue Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000004040 coloring Methods 0.000 claims abstract description 26
- 238000009501 film coating Methods 0.000 claims abstract description 8
- 239000007888 film coating Substances 0.000 claims abstract description 8
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 37
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000010030 laminating Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000003855 Adhesive Lamination Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 abstract description 19
- 238000007639 printing Methods 0.000 abstract description 8
- 238000005034 decoration Methods 0.000 abstract description 6
- 238000010023 transfer printing Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000012943 hotmelt Substances 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- 239000004417 polycarbonate Substances 0.000 description 21
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 238000003475 lamination Methods 0.000 description 6
- 238000004080 punching Methods 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 4
- 238000007645 offset printing Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 244000144992 flock Species 0.000 description 3
- 238000010409 ironing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the field of decoration plate preparation, and particularly relates to a manufacturing method of a double-faced laminated composite plate. According to the invention, based on the special structural requirements of the camera decorating part with the hollowed-out bottom, the upper and lower composite plates are separately processed and colored and then attached, so that the front surface of the hollowed-out bottom part is still provided with strong texture impression. The invention adopts a layered processing method to manufacture the composite board, takes hot melt adhesive as a medium, adopts a two-step bonding method, and sequentially bonds an upper plate and a lower plate which are colored. The upper plate and the lower plate are attached, so that the coloring processes such as printing, UV transfer printing, film coating and the like cannot be carried out in the annular inner part, and the use requirements of consumers are met; the gluing mode of hot melt glue avoids the problem of glue overflow and glue shortage caused by the flowing glue, ensures that a single product has no clearance during integral assembly, and can meet the market requirement for the reliability.
Description
Technical Field
The invention belongs to the field of decoration plate preparation, and particularly relates to a manufacturing method of a double-faced laminated composite plate.
Background
Nowadays, the innovation of the mobile phone communication technology continuously provides more convenience for people in daily life, and besides the increasingly abundant mobile phone functions, people also have more requirements on the appearance of the mobile phone. At present, the camera mirror decoration piece that uses on the cell-phone is mostly composite sheet camera decoration piece, for the outward appearance texture demand that satisfies each pattern, the preparation technology of decoration generally uses double-deck composite sheet (PC + PMMA), then do printing ink printing at the PC face, UV glues the rendition, the coating film, the spraying, the offset printing, coloring process such as dip-dyeing, carry out CNC appearance cutting at last in order to satisfy each type demand, but can not make with conventional scheme like the camera decoration of figure 1 structure, this structure needs bottom fretwork and does not influence the positive texture impression, can't reach the outward appearance demand with other coloring process in the back fretwork annular runway.
In addition, the UV glue is generally used in the lamination of the traditional composite board at present, and is generally used in full-plate lamination during the lamination of the UV glue. The lower plate is attached by using UV glue after being independently cut into an annular shape, so that the phenomenon of glue overflowing and frying at the cutting part is caused, and the problem of difficulty in processing residual glue is caused. Meanwhile, the UV glue may cause glue shortage due to residual flock, so that the reliability test of the product is influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for manufacturing a double-sided laminated composite board. The invention adopts a layered processing method to manufacture the composite board, uses hot melt adhesive as a medium, sequentially attaches an upper plate and a lower plate which are well colored, adopts a hot melt adhesive coiled film, has controllable size of the adhesive, and ensures that the cutting position of the lower plate can not generate bad phenomenon caused by the adhesive after being attached and cut. The upper plate and the lower plate thoroughly activate the hot melt adhesive in a double pressure maintaining and defoaming mode, and the reliability is not influenced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a manufacturing method of a double-sided laminated composite board comprises the following steps: respectively processing the lower plate and the upper plate, and then attaching to obtain a composite plate; wherein:
(1) processing the lower plate:
(1.1) using a PC/PMMA composite raw plate as a lower plate, coloring the PC surface of the lower plate as required, and covering a machine for film adding after the coloring is finished;
(1.2) carrying out hot melt adhesive bonding treatment on the PMMA surface of the lower plate, then carrying out heat treatment, and carrying out film changing treatment;
(1.3) carrying out CNC engraving treatment on the plate, and carrying out positioning engraving treatment;
(2) and (3) processing the upper plate:
(2.1) coloring the PC surface of the upper plate by using a PC/PMMA composite plate;
(2.2) positioning and carving the upper plate;
(3) bonding treatment:
(3.1) demoulding the PMMA surface of the lower plate;
(3.2) carrying out bonding treatment on the PC surface of the upper plate and the PMMA surface of the lower plate, and carrying out pressure maintaining heat treatment;
and (3.3) defoaming the heat-treated plate to obtain the target composite plate.
Preferably, the coloring treatment in the steps (1.1) and (2.1) is a conventional coloring process, and the coloring process is selected according to actual requirements and comprises ink printing, UV glue transfer printing, film coating, spraying, offset printing, dip dyeing and the like.
Preferably, in the step (1.1), machining films with different viscosities and thicknesses can be selected according to plates with different thicknesses, and the machining films are used for protecting the colored PC surface and preventing flying during CNC engraving. More preferably, the plate with the thickness of 1.0-2.0mm is selected to be an machined film with the viscosity of 180g/25mm and the thickness of 0.15 mm.
Preferably, the PC/PMMA composite green sheet in the step (1.1) refers to a PC + PMMA composite sheet without any treatment.
Preferably, the hot melt adhesive in the step (1.2) is a white hot melt adhesive with the thickness of 30-35 μm, and more preferably, the protective film of the white hot melt adhesive is a 25 μm PET film, so that the total thickness of the hot melt adhesive is 55-60 μm.
Preferably, the hot melt adhesive attaching treatment in the step (1.2) is to attach the hot melt adhesive to the PMMA surface, and when a film laminating machine for the hot melt adhesive attaching treatment is a rubber roller, the heating temperature of the film laminating machine is 120-130 ℃, and the heating rate is 4 cm/s; when the laminating machine is an iron roller, the heating temperature of the laminating machine is 100 ℃, and the heating rate is 3-5 cm/s.
Preferably, the heat treatment in the step (1.2) is that the PMMA surface of the lower plate material attached with the hot melt adhesive faces upwards, and the lower plate material is placed on a pyrograph machine for pyrography; more preferably, the ironing temperature is 60-65 ℃, the ironing pressure is 0.3-0.5MPa, and the ironing time is 3-5 s. The heat treatment step is used for activating the activity of the hot melt adhesive and enhancing the adhesive force between the lower plate and the adhesive surface of the hot melt adhesive.
Preferably, the film changing process in the step (1.2) is to change the hot melt adhesive with the PMMA surface from a protective film to a machined film or a CPO protective film so as to prevent the phenomenon of knife winding when CNC engraving and cutting are carried out. More preferably, the machine-applied film is a 180g/25mm viscosity machine-applied film.
Preferably, the CNC engraving process in the step (1.3) is a profile engraving process for the lower plate by CNC engraving.
Preferably, the CNC engraving in the step (1.3) uses a single-edge right-handed tungsten steel cutter, the rotation speed of the cutter is 35000 +/-3000 r/min, the feeding speed is 2.4-2.8m/min, and the service life of the cutter is 5000 pcs.
Preferably, the positioning and engraving process in the steps (1.3) and (2.2) includes engraving positioning holes in the corresponding upper plate and the corresponding lower plate, and the positioning holes of the upper plate are correspondingly overlapped with the positioning holes of the lower plate, so that the positioning holes are used for positioning when the upper plate and the lower plate are attached. More preferably, the positioning holes are formed by a plurality of circular holes with the diameter of 2-4mm, the positioning holes are uniformly distributed in the positions of the areas with the length and width of the upper plate or the lower plate, which are respectively contracted inwards by 10mm, more preferably, the area (length) in any long side direction or the area (width) in the short side direction of the corresponding plate is at least 3 circular holes, and more preferably, the area (width) in any long side direction or the area (length) in any short side direction of the corresponding plate is 4 circular holes. More preferably, the positioning and engraving process in the steps (1.3) and (2.2) is performed by conventional operations such as CNC engraving, punching by a punching machine, and the like.
Preferably, the PMMA surface of the PC/PMMA composite plate in the step (2.1) is hardened as required, and the hardening treatment is a conventional hardening treatment including, but not limited to, a hardening treatment using a hardening liquid.
Preferably, in the step (3.1), the demoulding treatment is to place the PMMA surface of the lower plate upwards in a tunnel furnace, set the temperature at 45 +/-5 ℃ and the speed at 0.5-1m/min, tear the film at the outlet of the tunnel furnace, and remove the machining film or the CPO protective film on the hot melt adhesive of the PMMA surface.
Preferably, the step (3.1) further comprises a flock removing treatment, so that no scraps are left at the edge of the trimming edge (the edge formed after the CNC engraving treatment cutting) of the lower plate when the lower plate is attached.
Preferably, the attaching treatment in the step (3.2) is to align the upper plate and the lower plate, and then attach the upper plate and the lower plate by using a pyrograph machine, wherein the attaching temperature is 120-130 ℃, the attaching pressure is 0.3-0.5MPa, and the attaching time is 10-20 s.
Preferably, the pressure-maintaining heat treatment in the step (3.2) includes placing the lower plate of the plate after the bonding treatment upward, and maintaining the pressure by a heating film covering machine. More preferably, the temperature of the heating film covering machine is 90 +/-5 ℃, the pressure is 0.2-0.4MPa, and the speed is 3-5 cm/s.
Preferably, the defoaming treatment in the step (3.3) adopts a defoaming machine for treatment, the defoaming temperature is 90 +/-5 ℃, and the defoaming time is 30-45 min.
According to the invention, based on the special structural requirements of the camera decorating part with the hollowed-out bottom, the upper and lower composite plates are separately processed and colored and then attached, so that the front surface of the hollowed-out bottom part is still provided with strong texture impression.
The hot melt adhesive is adopted for bonding, a two-step bonding method is adopted, the hot melt adhesive is taken as a medium and is sequentially bonded with the upper plate and the lower plate respectively, and the problems that the burrs and the adhesive overflow of the annular runway cannot be treated when the one-step bonding is in place are solved.
Compared with the prior art, the invention has the beneficial effects that: the upper plate and the lower plate are attached, so that the coloring processes such as printing, UV transfer printing, film coating and the like cannot be carried out in the annular inner part, and the use requirements of consumers are met; the gluing mode of hot melt glue avoids the problem of glue overflow and glue shortage caused by the flowing glue, ensures that a single product has no clearance during integral assembly, and can meet the market requirement for the reliability.
Drawings
FIG. 1 is a schematic view of a particular decorative element.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples.
Example (b):
the invention provides a manufacturing method of a double-sided laminated composite board, which comprises the following steps: respectively processing the lower plate and the upper plate, and then attaching to obtain a composite plate; wherein:
(1) and (3) processing a plate material:
(1.1) using a PC/PMMA composite raw plate as a lower plate, coloring the PC surface of the lower plate as required, and covering a machine for film adding after the coloring is finished;
wherein, the PC/PMMA composite green board is a PC + PMMA composite board which is not processed;
the coloring process can be established according to the appearance requirement, and different coloring processes are used for coloring, including ink printing, UV glue transfer printing, film coating, spraying, offset printing, dip dyeing and other coloring processes;
selecting machine-added films with different viscosities and thicknesses according to plates with different thicknesses, wherein the machine-added films are used for protecting a coloring PC (polycarbonate) surface and preventing flying during CNC (computerized numerical control) engraving, and more preferably, the machine-added films with the viscosity of 180g/25mm and the thickness of 0.15mm are selected for the plates with the thickness of 1.0-2.0 mm;
(1.2) carrying out hot melt adhesive bonding treatment on the PMMA surface of the lower plate, then carrying out heat treatment, and carrying out film changing treatment;
coating a PMMA surface with 30-micrometer white hot melt adhesive, confirming whether a machine can normally operate before starting a film coating machine, and setting the temperature; turning on a switch button, and confirming whether the rotation direction of the roller is correct or not;
the film laminating machine needs to distinguish the rubber roller from the iron roller and is used corresponding to different temperature parameters. For example, the temperature of the rubber heating film laminating machine is heated to between 120 ℃ and 130 ℃ at the speed of 4 cm/s; if the temperature of the laminating machine is heated to 100 ℃ by using an iron roller and the speed is 3-5cm/s, the hot melt adhesive is ensured to be centered during laminating, and the cleanliness is ensured before the lamination of the plate. Debugging the positioning PIN, confirming the consistency of the film covering position and the product size, and slightly placing the material on a film covering machine platform after finishing;
and (4) carrying out heat treatment, wherein the PMMA hot melt adhesive surface protective film is upward, and placing the PMMA hot melt adhesive surface protective film on a pyrograph machine for pyrograph pressing. The temperature, pressure and time are set at 60-65 deg.C, 0.3-0.5MPa and 3-5 s. The adhesive is used for activating the activity of the hot melt adhesive and enhancing the adhesive force between the lower plate and the adhesive surface of the hot melt adhesive;
after the products are transferred to the tail end, the film covering personnel use the blade to slowly cut the two products from the space between the two products;
performing film replacement treatment, replacing the torn hot melt adhesive surface with a protective film, and replacing the torn hot melt adhesive surface with a 180g/25mm machine-added film or a CPO protective film, so as to prevent a cutter from being wound when CNC is used for cutting, and confirm that the film covering position is centered when film covering;
(1.3) carrying out CNC engraving treatment on the plate, and carrying out positioning engraving treatment;
wherein, the CNC engraving treatment is to engrave the shape of the lower plate material by CNC engraving to obtain the required shape; the CNC engraving uses a single-edge right-handed tungsten steel cutter, the rotating speed of the cutter is 35000 +/-3000 r/min, the feeding is 2.4-2.8m/min, and the service life of the cutter is 5000 pcs;
the positioning and carving treatment is to punch a plurality of positioning holes on the lower plate in a mode of CNC carving or punching by a punching machine for positioning when the upper plate and the lower plate are attached; the positioning holes are round holes with the diameter of 2-4mm, are uniformly distributed at the positions of the areas with the length and width of the lower plate respectively contracted by 10mm, more preferably, the area (length) in any long side direction or the area (width) in the short side direction of the corresponding plate is at least 3 round holes, and more preferably, 4 round holes are arranged;
(2) and (3) upper plate processing:
(2.1) coloring the PC surface of the upper plate by using a PC/PMMA composite plate;
the method comprises the following steps of (1) carrying out hardening treatment on a PMMA surface of a PC/PMMA composite board as required, wherein the hardening treatment is conventional hardening treatment, and includes but is not limited to hardening treatment by using hardening liquid;
the coloring treatment can be established according to the appearance requirement, and different coloring processes are used for coloring, including ink printing, UV glue transfer printing, film coating, spraying, offset printing, dip dyeing and other coloring processes;
(2.2) positioning and carving the upper plate;
the positioning and carving treatment is realized in a mode of punching through a CNC (computerized numerical control) carving or punching machine, a plurality of positioning holes which correspond to the lower plate one by one are punched on the upper plate, so that the positions of the positioning holes of the upper plate and the positioning holes of the lower plate are overlapped, control can be carried out in a contraposition film or measurement mode, the relative position of subsequent lamination is ensured to be error-free, and the positioning and carving treatment is used for positioning when the upper plate and the lower plate are laminated;
(3) bonding treatment:
(3.1) demoulding the PMMA surface of the lower plate;
the demoulding treatment comprises the steps of placing the PMMA surface of a lower plate upwards at an initial position in a tunnel furnace, passing through the tunnel furnace, setting the temperature to be 45 +/-5 ℃, the speed to be 0.5-1m/min, closing a discharge hole when the discharge hole is cooled, carrying out film tearing operation at the outlet position of the tunnel furnace, and removing a machining film or a CPO protective film on the PMMA surface hot melt adhesive;
the method also comprises the step of removing the burrs, wherein the burrs in the lower plate are removed by a dust stick (made by an adhesive tape), so that no chips are left at the edge of the trimming edge (the edge formed after the CNC engraving treatment and cutting) of the lower plate when the lower plate is attached;
(3.2) carrying out bonding treatment on the PC surface of the upper plate and the PMMA surface of the lower plate, and carrying out pressure maintaining heat treatment;
aligning the upper plate and the lower plate by using a bakelite plate tool with a positioning pin, wherein the height of the positioning pin is less than the stacking thickness of the upper plate and the lower plate, and laminating by using a pyrograph machine, wherein the parameter setting of the pyrograph machine is as shown, the laminating temperature is 120-130 ℃, the laminating pressure is 0.3-0.5MPa, and the laminating time is 10-20 s;
the pressure maintaining heat treatment is that the lower plate of the plate which finishes the pyrograph process is placed upwards, the pressure is maintained by heating a film laminating machine, the heating function of the film laminating machine needs to be started, the temperature is set to be 90 +/-5 ℃, the pressure is 0.2-0.4MPa, and the speed is 3-5 cm/s;
(3.3) defoaming the heat-treated plate to obtain a target composite plate;
wherein, defoaming treatment adopts a defoaming machine, parameters of the defoaming machine are set as follows: 90 plus or minus 5 ℃; time: and (3) 30-45min, lamination and defoaming cannot be performed during defoaming, baking trays are required to be used for spacing, uniform heating of each product is guaranteed, and the target composite board is finally obtained.
The double-sided laminated composite board prepared by the embodiment is laminated after the upper and lower composite boards are processed and colored independently, so that the coloring processes such as printing, UV transfer printing, film coating and the like cannot be performed in the annular interior, the use requirements of consumers are met, and the decorating parts are ensured to meet the requirements of appearance textures; meanwhile, a two-step laminating method is adopted, the hot melt adhesive is used as a medium and is sequentially laminated with the upper plate and the lower plate respectively, the problems of flock and adhesive overflow caused by incapability of processing the annular runway when the single product is laminated in place in one step are avoided, the single product is ensured to have no gap during integral assembly, and the reliability can meet the market requirement.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. A manufacturing method of a double-sided laminated composite board is characterized by comprising the following steps: respectively processing the lower plate and the upper plate, and then attaching to obtain a composite plate; wherein:
(1) processing the lower plate:
(1.1) using a PC/PMMA composite raw plate as a lower plate, coloring the PC surface of the lower plate, and covering a machine for film adding after the coloring treatment is finished;
(1.2) carrying out hot melt adhesive bonding treatment on the PMMA surface of the lower plate, then carrying out heat treatment, and carrying out film changing treatment;
(1.3) carrying out CNC engraving treatment on the plate, and carrying out positioning engraving treatment;
(2) and (3) processing the upper plate:
(2.1) coloring the PC surface of the upper plate by using a PC/PMMA composite plate;
(2.2) positioning and carving the upper plate;
(3) bonding treatment:
(3.1) demoulding the PMMA surface of the lower plate;
(3.2) carrying out bonding treatment on the PC surface of the upper plate and the PMMA surface of the lower plate, and carrying out pressure maintaining heat treatment;
and (3.3) defoaming the heat-treated plate to obtain the target composite plate.
2. The method for manufacturing a double-sided laminated composite board according to claim 1, wherein in the step (1.1), machining films with different viscosities and thicknesses are selected according to boards with different thicknesses.
3. The method for manufacturing the double-sided laminated composite board according to claim 2, wherein the thickness of the board of 1.0-2.0mm is 0.15mm, and the thickness of the board is 180g/25 mm.
4. The method for manufacturing the double-sided laminated composite board according to claim 1, wherein the hot melt adhesive in the step (1.2) is a white hot melt adhesive with a thickness of 30-35 μm.
5. The method for manufacturing a double-sided laminated composite board according to claim 1, wherein in the step (1.2), when a laminator for hot melt adhesive lamination is a rubber roller, the heating temperature of the laminator is 120 ℃ to 130 ℃, and the heating rate is 4 cm/s; when the laminating machine is an iron roller, the heating temperature of the laminating machine is 100 ℃, and the heating rate is 3-5 cm/s.
6. The method for manufacturing the double-sided laminated composite board according to claim 1, wherein the lower board material PMMA face, which is adhered with the hot melt adhesive, is subjected to heat treatment in the step (1.2) to be upward, and the lower board material PMMA face is placed on a pyrograph machine to be subjected to pyrography at the temperature of 60-65 ℃ and under the pressure of 0.3-0.5MPa for 3-5 s.
7. The method according to claim 1, wherein the demolding process in the step (3.1) is to place the PMMA surface of the lower plate facing upwards in a tunnel furnace, set the temperature at 45 ± 5 ℃ and the speed at 0.5-1m/min, and tear the film at the exit position of the tunnel furnace.
8. The method for manufacturing a double-sided laminated composite board according to claim 1, wherein the laminating treatment in the step (3.2) is to laminate the upper board and the lower board by using a pyrograph machine, the laminating temperature is 120-130 ℃, the laminating pressure is 0.3-0.5MPa, and the laminating time is 10-20 s.
9. The method according to claim 1, wherein the pressure-maintaining heat treatment in step (3.2) is carried out by placing the lower plate of the plate after the bonding treatment upward, and passing the plate through a heating film-coating machine at a temperature of 90 ± 5 ℃, a pressure of 0.2-0.4MPa, and a speed of 3-5cm/s for pressure-maintaining heat treatment.
10. The method for manufacturing a double-sided laminated composite board according to claim 1, wherein the defoaming temperature of the defoaming treatment in the step (3.3) is 90 ± 5 ℃, and the defoaming time is 30-45 min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115195269A (en) * | 2022-06-01 | 2022-10-18 | 东莞正广精密科技有限公司 | Film pasting process for pen power front cover plate |
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