CN105729841A - Machining method for light guide boards - Google Patents
Machining method for light guide boards Download PDFInfo
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- CN105729841A CN105729841A CN201610131590.0A CN201610131590A CN105729841A CN 105729841 A CN105729841 A CN 105729841A CN 201610131590 A CN201610131590 A CN 201610131590A CN 105729841 A CN105729841 A CN 105729841A
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- China
- Prior art keywords
- light guide
- guide plate
- resin
- processing method
- wedge shape
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- 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
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00663—Production of light guides
-
- 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
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00932—Combined cutting and grinding thereof
-
- 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
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00951—Measuring, controlling or regulating
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention relates to a machining method for light guide boards. The method includes the steps that solid resin is melted to liquid resin; the liquid resin is extruded to a wedge-shaped mold and cured on the wedge-shaped mold to form a wedge-shaped light guide board blank; a roller hot mill is utilized for conducting hot milling on the light guide board blank; then the light guide board blank is cut in a crossed mode to form the multiple light guide boards; the light guide boards are preheated; secondary hot rolling is conducted on the preheated light guide boards; the light guide boards subjected to secondary hot rolling are placed in an anti-deformation area and conveyed to the next procedure; and the light guide boards are cooled and cut, so that the finished light guide boards are obtained. By means of the machining method for the light guide boards, the light guide boards have higher brightness and better toughness, and are not prone to breaking off and thinner, the yield of the light guide boards is greatly increased, and the production efficiency of the light guide boards is also effectively improved.
Description
Technical field
The present invention relates to light guide plate processing technique field, the processing method particularly relating to light guide plate.
Background technology
Light guide plate is the acrylic/PC sheet material of a kind of optical grade, there is the feature of high reflectance and not extinction, it is widely used on LCD and LED display, it utilizes optical grade acryl plates to draw the light sent from lamp, and when light is mapped to each light guiding points, reflection light can toward all angles diffusion, then penetrated by light guide plate front, by various densitys, light guiding points not of uniform size, light guide plate uniformly light-emitting can be made, it is achieved line source is converted to area source.
Existing light guide plate adopts the mode processing and manufacturing of ejection formation mostly, and its principle is that optical grade PMMA (polymethyl methacrylate) granule is used high temperature, high pressure to inject cooling forming in mould by emission forming machine.In general, the light guide plate of injection type is 0.45mm, and thickness is bigger, it is easy to produce burr, it is easy to producing the irregular situation of molding, cause Stress non-homogeneity, pliability is poor, easily loses during bending, and briliancy is low, and product yield is low.
Summary of the invention
Based on this, it is necessary that the light guide plate produced for existing injection molding method easily produces burr, shaped article is in irregular shape, the defect that product yield is low, it is provided that a kind of light conducting board processing method, processed light guide plate pliability is good, not easily lose, briliancy is high, and thickness is thinner, and product yield is greatly improved.
The processing method of a kind of light guide plate, comprises the following steps:
The resin melting of solid-state is become aqueous resin；
Being squeezed on wedge shape mould by aqueous resin, resin solidify to form the light guide plate blank of wedge shape on wedge shape mould；
Utilize roller hot-rolling mill that light guide plate blank is carried out hot-rolling pressure；
Light guide plate blank is carried out decussation cutting and forms multiple light guide plates；
Light guide plate is preheated；
Light guide plate after preheating is carried out second heat roll-in；
The light guide plate of second heat roll-in is put into anti-deformation interval, is sent to subsequent processing；
After light guide plate cools down, light guide plate cutting is formed finished product.
In one embodiment, described anti-deformation interval includes at least two block pressur plates, and two pieces of described pressing plates are connected to two opposing surfaces of described light guide plate.
In one embodiment, the described step that light guide plate after preheating carries out second heat roll-in also includes:
Light guide plate surface is made to form site by second heat roll-in.
In one embodiment, also included before light guide plate blank is carried out the step of the decussation cutting multiple light guide plates of formation:
Cut to eliminate burr to the edge of light guide plate blank.
In one embodiment, further comprise the steps of: after the edge of light guide plate blank cuts to eliminate the step of burr
Two opposing surfaces of light guide plate blank are carried out pad pasting.
In one embodiment, described being squeezed on wedge shape mould by aqueous resin, resin solidify to form in the step of light guide plate blank of wedge shape on wedge shape mould, adopts and extrudes forming machine and be squeezed on wedge shape mould by the resin of liquid.
In one embodiment, described extrusion forming machine includes screw rod, and the resin of liquid is squeezed on wedge shape mould by described extrusion forming machine by screw rod it described.
In one embodiment, further comprise the steps of: after the described step that the resin melting of solid-state is become aqueous resin
The resin of liquid is dried process.
In one embodiment, in the described step that light guide plate after preheating carries out second heat roll-in, the temperature of hot-rolling pressure is 80 DEG C to 110 DEG C.
In one embodiment, in the described step that light guide plate after preheating carries out second heat roll-in, the temperature of hot-rolling pressure is 95 DEG C.
The processing method of above-mentioned light guide plate, the briliancy making light guide plate is higher, toughness is more preferably, not easily lose, and thickness is thinner, the yield of light guide plate is made to be greatly improved by the processing method of above-mentioned light guide plate, on the other hand, by the light conducting board processing method of the present invention, it is effectively increased the production efficiency of light guide plate.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the processing method of the light guide plate of one embodiment of the invention.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Accompanying drawing gives presently preferred embodiments of the present invention.But, the present invention can realize in many different forms, however it is not limited to embodiment described herein.On the contrary, the purpose providing these embodiments is to make the understanding to the disclosure more thorough comprehensively.
Such as, as it is shown in figure 1, the processing method of a kind of light guide plate, comprise the following steps:
Step S110, becomes aqueous resin by the resin melting of solid-state.
Step S120, is squeezed on wedge shape mould by aqueous resin, and resin solidify to form the light guide plate blank of wedge shape on wedge shape mould.Such as, being squeezed on wedge shape mould by screw rod by aqueous resin, and for example, resin solidify to form the light guide plate blank of the preset thickness of wedge shape on wedge shape mould；And for example, by restricting the quantity extruding aqueous resin, it is achieved described preset thickness.And for example, before aqueous resin is squeezed on wedge shape mould, also wedge shape mould is carried out the pre-heat treatment, and when aqueous resin is squeezed on wedge shape mould, carries out under preset temperature environment.
Aqueous resin is squeezed on wedge shape mould, due to resin pressurized and then have finer and close quality so that the intensity of light guide plate blank is higher, toughness is more preferably, the shape more matched mold of the light guide plate blank of compacting, shape is more regular, effectively reduces burr.
Such as, this step adopt extrusion forming machine be squeezed on wedge shape mould by the resin of liquid, such as, described extrusion forming machine includes screw rod, and the resin of liquid is squeezed on wedge shape mould by screw rod by described extrusion forming machine, by screw rod, resin is pressed into wedge shape mould, make the pressure that resin is squeezed on the one hand, on the other hand resin can being pressed into continuously, the light guide plate blank structure that compacting is formed is more compact, firm, and toughness is higher.Such as, described extrusion forming machine also includes a discharge barrel, and described screw rod rotates and is arranged in described discharge barrel, and the resin of liquid is driven by described screw rod in discharge barrel, and the direction of motion along described screw rod is pressed out to wedge shape mould.
Step S130, utilizes roller hot-rolling mill that light guide plate blank is carried out hot-rolling pressure.
Roller hot-rolling mill includes two mutual abuttings, and rotates contrary pressure roller, by two pressure rollers, two opposing surfaces of light guide plate is carried out roll-in, by light guide plate is heated, resin is softened, and quality is more fine and close under stress, so that the toughness of light guide plate is more preferably.Such as, the temperature of described hot-rolling pressure is 90 DEG C to 115 DEG C, such as, the temperature of described hot-rolling pressure is 100 DEG C, by electric heating, pressure roller is heated, sheeting roll surface temperature is made to increase, the temperature of pressure roller is unsuitable too high, the resin melting that too high temperature easily makes, deformation, the temperature of pressure roller is also unsuitable too low, too low temperature makes resin to soften, make pressing effect not good, therefore, in the present embodiment, the surface temperature of hot-rolling pressure and pressure roller 100 DEG C, by contacting with the two of light guide plate opposing surfaces, the temperature making light guide plate raises, so that light guide plate softening, make pressing effect more preferably.
Step S140, carries out decussation cutting and forms multiple light guide plates light guide plate blank.
Light guide plate blank has bigger area, it is necessary to light guide plate blank cuts into multiple light guide plates of pre-set dimension, in order to following process and packaging.
Step S150, preheats light guide plate.
nullSuch as，Light guide plate is transmitted by conveyer belt，In described light guide plate transmission process，The temperature of conveyer belt is set to 65 DEG C to 85 DEG C，Such as，The temperature of described conveyer belt is set to 75 DEG C，By conveyer belt, light guide plate is preheated in transmission process，The temperature making light guide plate can be risen to the temperature required of second heat roll-in comparatively slowly by initial temperature，The efficiency of heating surface of light guide plate can be improved on the one hand，Make light guide plate when the second heat roll-in carrying out next step，Its temperature can rise to the temperature needed for second heat roll-in within a short period of time，On the other hand，The relief area of temperature rising is provided for light guide plate，Light guide plate can be avoided to cause that quality becomes loose situation when second heat roll-in owing to relatively low temperature rapidly increases to higher temperature，In order to improve pre-heat effect further，Such as，The temperature of described conveyer belt is risen progressively gradually along the direction of advance temperature of light guide plate，So，Can so that the temperature of light guide plate can be gradually increased，Make pre-heat effect more preferably.
Step S160, carries out second heat roll-in to the light guide plate after preheating.
nullSuch as，The temperature of second heat roll-in is 80 DEG C to 110 DEG C，Such as，The temperature of second heat roll-in is 95 DEG C，It should be understood that，The temperature of second heat roll-in is the temperature of roller surface，By electric heating, pressure roller is heated，Sheeting roll surface temperature is made to increase，The temperature of pressure roller is unsuitable too high，The resin melting that too high temperature easily makes，Deformation，The temperature of pressure roller is also unsuitable too low，Too low temperature makes resin to soften，Make pressing effect not good，Therefore，In the present embodiment，The surface temperature of second heat roll-in and pressure roller is 95 DEG C，By contacting with the two of light guide plate opposing surfaces，The temperature making light guide plate raises，So that light guide plate softening，Make pressing effect more preferably，One referred to is mentioned that，The temperature of second heat roll-in is low compared with the temperature of hot-rolling pressure in above-mentioned steps，Due in above-mentioned steps，Light guide plate is through a hot-rolling pressure，Quality has become comparatively dense，As now again light guide plate heated with higher temperature，It is easily destroyed the quality of original densification，Therefore，Second heat roll-in adopts the temperature than hot-rolling forces down first to carry out hot-rolling pressure，On the one hand，Can so that light guide plate can soften，And do not destroy the quality of original densification，On the other hand，Can further such that light guide plate be more fine and close，Improve the toughness of light guide plate.
Step S170, puts into anti-deformation interval to the light guide plate of second heat roll-in, is sent to subsequent processing.
Specifically, higher by the light guide plate temperature after hot-rolling pressure, due to the characteristic of expanding with heat and contract with cold of resin, resin easily produces deformation after being heated, after leaving hot-pressing roller, resin easily produces bounce-back when not having pressurized, causes deformation, and along with the process cooled down gradually is shaped, in order to limit the expansion of resin, it is to avoid light guide plate produces deformation, the transmission process of the light guide plate after second heat roll-in arranges anti-deformation interval, light guide plate is limited, it is to avoid light guide plate produces too much deformation.
Such as, it is interval that multiple anti-deformation is set, for instance, multiple anti-deformation intervals are placed equidistant, such as, the length being smaller than light guide plate that multiple anti-deformation are interval, so so that light guide plate can continuous the to enter anti-deformation interval in transmission process, avoid the dilatancy of light guide plate, in transmission process, the temperature of light guide plate is gradually lowered, and obtains cooling aftershaping.
Step S180, after light guide plate cools down, forms finished product to light guide plate cutting.
Such as, the resin in the present embodiment is PMMA (polymethyl methacrylate).Owing to light guide plate is shaped by extrusion resin, therefore resin distribution is more uniformly distributed, and stress is more uniformly distributed, and resin quality is more fine and close, and intensity is higher, and by the hot-rolling pressure of twice so that the toughness of light guide plate is improved, and not easily loses.Due to light guide plate toughness more preferably, intensity is higher, and therefore, it is thinner that the thickness of light guide plate can be processed so that briliancy improve.
In one embodiment, described anti-deformation interval includes at least two block pressur plates, and two pieces of described pressing plates are connected to two opposing surfaces of described light guide plate.
Such as, light guide plate is undertaken being sent to subsequent processing by conveyer belt, such as, two pieces of described pressing plates are arranged on the upper and lower of transmission band, and be correspondingly arranged, when light guide plate is through out-of-date, the surface that upper and lower two of described light guide plate are opposing is connected to two pieces of described pressing plates respectively, by described pressing plate, light guide plate is limited, it is prevented that light guide plate deformation.
In one embodiment, step S160 also includes:
Light guide plate surface is made to form site by second heat roll-in.
Site so that the light injecting light guide plate produces refraction and high reflection, so that the dispersion effect of light guide plate is more preferably, can improve the light-conductive rate of light guide plate so that the briliancy of light guide plate is more preferably.Such as, at roller surface, raised points is set, site is formed in light guide plate surface compacting by raised points, such as, raised points is uniformly arranged on roller surface, so that site can be uniformly distributed, site scattering is more uniformly distributed, and for example, a site is suppressed at light guide plate blank spaced surface 2mm～6mm, such as, a site is suppressed at light guide plate blank spaced surface 3mm, such as, described site diameter is 0.06mm～0.08mm, such as, described site diameter is 0.07mm, so, can so that the surface of light guide plate blank be uniformly distributed site, make the light injecting light guide plate can refract to different directions under different site effects, improve the light-conductive rate of light guide plate.
In one embodiment, also include before step S140:
Step S135, cuts to eliminate burr to the edge of light guide plate blank.
Although it should be understood that light guide plate blank burr molding by extrusion is less, but its edge is still likely to generate burr, in order to improve the quality of described light guide plate blank, for instance, the edge along described light guide plate blank carries out cutting to eliminate burr.Such as, the mode that laser cuts is adopted to carry out eliminating the burr at the edge of light guide plate blank, for instance, utilize water cutter to eliminate the burr of light guide plate blank, and for example, is polished in the edge of light guide plate blank, to eliminate burr.
In one embodiment, also include after step S135:
Two opposing surfaces of light guide plate blank are carried out pad pasting by step S136.Such as, adopt double-sided insulation, with different electricity mode, two opposing surfaces of light guide plate blank are carried out pad pasting.
Such as, at two of light guide plate blank opposing surface pasting protective films, it is possible to effectively the surface of light guide plate blank is protected.
In one embodiment, also include after step silo:
Step S115, is dried process to the resin of liquid.
In order to reduce the moisture content entrained by resin, after to resin melting, resin is dried process, can effectively reduce the moisture content on resin, it is to avoid moisture merges with resin, it is to avoid follow-up resin is solidified and impacts, such as, resin is carried out air-dry, for instance, resin is dried, such as, drying temperature is 40 DEG C to 50 DEG C, for instance, drying time is 30 minutes to 60 minutes.
By the light conducting board processing method of the present invention, effectively reduce the thickness of light guide plate, it is 0.45mm that traditional injection type processes forms the thickness of light guide plate, and the thickness of the light guide plate that the light conducting board processing method of the present invention processes is 0.3mm, the thickness making light guide plate effectively reduces 33%, reduction along with thickness, the briliancy of light guide plate improves accordingly, it is 9 that traditional injection type processes forms the briliancy of light guide plate, 450cd/m2, and the briliancy of the light guide plate that the light conducting board processing method of the present invention processes is 10, 000cd/m2, the briliancy making light guide plate improves 6%.
On the other hand, by the light conducting board processing method of the present invention, improve the production efficiency of light guide plate.
Price owing to extruding forming machine is low compared with the cost of ejaculator, therefore, it can arrange multiple stage on growth line and extrudes forming machine, to improve production efficiency.It addition, separate unit extrudes the production efficiency height of production efficiency also relatively single ejaculator talked of forming machine.Following table is ejaculator and extrude forming machine and produce 5 " and 8 " contrast table of the odd-numbered day volume of production of the light guide plate of two kinds of models.
As can be seen from the above table, by extrude forming machine processing light guide plate, 5 " and 8 " light guide plate odd-numbered day volume of production be respectively increased 260% and 380%, production efficiency is greatly improved.
The optical characteristic measurement data comparison sheet of the light guide plate that the following is the light guide plate adopting injection type processes and processed by the processing method of the present invention:
As seen from the above table, distribution of color and the briliancy of the light guide sheet processed by the processing method of the present invention are more uniformly spread, and variance is less, and light guide effect is more preferably.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the processing method of a light guide plate, it is characterised in that comprise the following steps:
The resin melting of solid-state is become aqueous resin；
Being squeezed on wedge shape mould by aqueous resin, resin solidify to form the light guide plate blank of wedge shape on wedge shape mould；
Utilize roller hot-rolling mill that light guide plate blank is carried out hot-rolling pressure；
Light guide plate blank is carried out decussation cutting and forms multiple light guide plates；
Light guide plate is preheated；
Light guide plate after preheating is carried out second heat roll-in；
The light guide plate of second heat roll-in is put into anti-deformation interval, is sent to subsequent processing；
After light guide plate cools down, light guide plate cutting is formed finished product.
2. the processing method of light guide plate according to claim 1, it is characterised in that described anti-deformation interval includes at least two block pressur plates, two pieces of described pressing plates are connected to two opposing surfaces of described light guide plate.
3. the processing method of light guide plate according to claim 1, it is characterised in that the described step that light guide plate after preheating carries out second heat roll-in also includes:
Light guide plate surface is made to form site by second heat roll-in.
4. the processing method of light guide plate according to claim 1, it is characterised in that also included before light guide plate blank is carried out the step of the decussation cutting multiple light guide plates of formation:
Cut to eliminate burr to the edge of light guide plate blank.
5. the processing method of light guide plate according to claim 4, it is characterised in that further comprise the steps of: after the edge of light guide plate blank cuts to eliminate the step of burr
Two opposing surfaces of light guide plate blank are carried out pad pasting.
6. the processing method of light guide plate according to claim 1, it is characterized in that, described being squeezed on wedge shape mould by aqueous resin, resin solidify to form in the step of light guide plate blank of wedge shape on wedge shape mould, adopts and extrudes forming machine and be squeezed on wedge shape mould by the resin of liquid.
7. the processing method of light guide plate according to claim 6, it is characterised in that described extrusion forming machine includes screw rod, and the resin of liquid is squeezed on wedge shape mould by described extrusion forming machine by screw rod it described.
8. the processing method of light guide plate according to claim 1, it is characterised in that further comprise the steps of: after the described step that the resin melting of solid-state is become aqueous resin
The resin of liquid is dried process.
9. the processing method of light guide plate according to claim 1, it is characterised in that in the described step that light guide plate after preheating carries out second heat roll-in, the temperature of hot-rolling pressure is 80 DEG C to 110 DEG C.
10. the processing method of light guide plate according to claim 9, it is characterised in that in the described step that light guide plate after preheating carries out second heat roll-in, the temperature of hot-rolling pressure is 95 DEG C.
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| CN201610131590.0A CN105729841B (en) | 2016-03-08 | 2016-03-08 | The processing method of light guide plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610131590.0A CN105729841B (en) | 2016-03-08 | 2016-03-08 | The processing method of light guide plate |
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| CN105729841B CN105729841B (en) | 2018-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318956A (en) * | 2018-01-16 | 2018-07-24 | 滁州佳宏光电有限公司 | A kind of mobile phone light guide panel distortion correction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103963317A (en) * | 2014-04-22 | 2014-08-06 | 湖南大学 | Heating device for preparing fiber-reinforced polymer-based composite material |
| CN105111655A (en) * | 2015-09-16 | 2015-12-02 | 梁志勇 | Light guide plate manufacturing technological process system |
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2016
- 2016-03-08 CN CN201610131590.0A patent/CN105729841B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103963317A (en) * | 2014-04-22 | 2014-08-06 | 湖南大学 | Heating device for preparing fiber-reinforced polymer-based composite material |
| CN105111655A (en) * | 2015-09-16 | 2015-12-02 | 梁志勇 | Light guide plate manufacturing technological process system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318956A (en) * | 2018-01-16 | 2018-07-24 | 滁州佳宏光电有限公司 | A kind of mobile phone light guide panel distortion correction method |
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