CN105729841B - The processing method of light guide plate - Google Patents
The processing method of light guide plate Download PDFInfo
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- CN105729841B CN105729841B CN201610131590.0A CN201610131590A CN105729841B CN 105729841 B CN105729841 B CN 105729841B CN 201610131590 A CN201610131590 A CN 201610131590A CN 105729841 B CN105729841 B CN 105729841B
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- 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 present invention relates to a kind of processing method of light guide plate, the method includes the steps：By solid resin melting at the resin of liquid；The resin of liquid is squeezed to wedge shape mould, resin is formed by curing the light guide plate blank of wedge shape on wedge shape mould；Hot-rolling pressure is carried out to light guide plate blank using roller hot-rolling mill；Right-angled intersection is carried out to light guide plate blank to cut to form multiple light guide plates；Light guide plate is preheated；Second heat roll-in is carried out to the light guide plate after preheating；Anti- deformation section is put into the light guide plate of second heat roll-in, is sent to subsequent processing；After light guide plate cooling, light guide plate is cut to form finished product.The processing method of above-mentioned light guide plate, so that the briliancy higher of light guide plate, toughness is more preferably, it is not easy to lose, and it is thinner, by the processing method of above-mentioned light guide plate the yield of light guide plate is greatly improved, on the other hand, light conducting board processing method through the invention effectively increases the production efficiency of light guide plate.
Description
Technical field
The present invention relates to light guide plate processing technique fields, more particularly to the processing method of light guide plate.
Background technology
Light guide plate is a kind of acrylic of optical grade/PC plate material, has the characteristics that high reflectivity and not extinction, extensive
It applies on LCD and LED display, the light issued from lamp is drawn using optical grade acryl plates, when light is mapped to respectively
When a light guiding points, reflected light can be spread toward all angles, then be projected by light guide plate front, by various densitys, not of uniform size
Light guiding points, can make light guide plate uniformly light-emitting, realize and linear light source is converted into area source.
The mode that existing light guide plate mostly uses greatly ejection formation fabricates, and principle is emission forming machine by optical grade
PMMA (polymethyl methacrylate) particle injects cooling forming in mold with high temperature, high pressure.In general, injection type is led
Tabula rasa thickness is 0.45mm, and thickness is larger, easy tos produce burr, easy tos produce the irregular situation of molding, leads to unbalanced stress
Even, flexibility is poor, and when bending is easily lost, and briliancy is low, and product yield is low.
Invention content
Based on this, it is necessary to easy to produce burr, shaped article shape for the light guide plate of existing injection molding method production
Shape is irregular, the low defect of product yield, provides a kind of light conducting board processing method, processed light guide plate flexibility is good, is not easy
It loses, briliancy is high, and thinner, product yield greatly improves.
A kind of processing method of light guide plate, includes the following steps：
By solid resin melting at the resin of liquid；
The resin of liquid is squeezed to wedge shape mould, the light guide plate that resin is formed by curing wedge shape on wedge shape mould is young
Shape；
Hot-rolling pressure is carried out to light guide plate blank using roller hot-rolling mill；
Right-angled intersection is carried out to light guide plate blank to cut to form multiple light guide plates；
Light guide plate is preheated；
Second heat roll-in is carried out to the light guide plate after preheating；
Anti- deformation section is put into the light guide plate of second heat roll-in, is sent to subsequent processing；
After light guide plate cooling, light guide plate is cut to form finished product.
In one embodiment, the anti-deformation section includes at least two block pressur plates, and two pieces of pressing plates are connected to described
Two opposite surfaces of light guide plate.
In one embodiment, described pair preheating after light guide plate carry out second heat roll-in the step of further include：
Light guide plate surface is made to form site by second heat roll-in.
In one embodiment, before carrying out right-angled intersection to light guide plate blank and cutting the step of forming multiple light guide plates
Further include：
The edge of light guide plate blank is cut to eliminate burr.
In one embodiment, further include after the step of edge to light guide plate blank is cut to eliminate burr
Step：
The surface opposite to two of light guide plate blank carries out pad pasting.
In one embodiment, described to squeeze the resin of liquid to wedge shape mould, resin cures on wedge shape mould
In the step of forming the light guide plate blank of wedge shape, the resin of liquid is squeezed to wedge shape mould using forming machine is extruded.
In one embodiment, the extrusion forming machine includes screw rod, and the extrusion forming machine will by screw rod described in its
The resin of liquid is squeezed to wedge shape mould.
In one embodiment, it is described by solid resin melting at liquid resin the step of after further include step：
Processing is dried to the resin of liquid.
In one embodiment, in the step of light guide plate after described pair of preheating carries out second heat roll-in, the temperature of hot-rolling pressure
Degree is 80 DEG C to 110 DEG C.
In one embodiment, in the step of light guide plate after described pair of preheating carries out second heat roll-in, the temperature of hot-rolling pressure
Degree is 95 DEG C.
The processing method of above-mentioned light guide plate so that the briliancy higher of light guide plate, toughness more preferably, is not easy to lose, and thickness is more
It is thin, by the processing method of above-mentioned light guide plate the yield of light guide plate is greatly improved, on the other hand, leaded light through the invention
Plate processing method effectively increases the production efficiency of light guide plate.
Description of the drawings
Fig. 1 is the flow diagram of the processing method of the light guide plate of one embodiment of the invention.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give presently preferred embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.Keep the understanding to the disclosure more thorough on the contrary, purpose of providing these embodiments is
Comprehensively.
For example, as shown in Figure 1, a kind of processing method of light guide plate, includes the following steps：
Step S110, by solid resin melting at the resin of liquid.
Step S120 squeezes the resin of liquid to wedge shape mould, and resin is formed by curing wedge shape on wedge shape mould
Light guide plate blank.For example, being squeezed the resin of liquid to wedge shape mould by screw rod, for another example, resin is solid on wedge shape mould
Change the light guide plate blank for the preset thickness for forming wedge shape；For another example, the quantity that the resin of liquid is squeezed by limitation, is realized described pre-
If thickness.For another example, before squeezing the resin of liquid to wedge shape mould, also to wedge shape mould progress the pre-heat treatment, and
When the resin of liquid is squeezed to wedge shape mould, carried out under preset temperature environment.
The resin of liquid is squeezed to wedge shape mould, since resin is pressurized and then has finer and close quality so that lead
The intensity higher of tabula rasa blank, toughness more preferably, more advise by the shape of light guide plate blank more matched mold, shape made of compacting
Then, burr is effectively reduced.
For example, the resin of liquid is squeezed to wedge shape mould using extrusion forming machine in this step, for example, the extrusion
Forming machine includes screw rod, and the extrusion forming machine is squeezed the resin of liquid to wedge shape mould by screw rod, will by screw rod
Resin is pressed into wedge shape mould so that on the other hand on the one hand pressure that resin is squeezed allows resin to be continuously pressed into, press
It is more compact, firm to make the light guide plate blank structure formed, and toughness is stronger.For example, the extrusion forming machine further includes one
Discharge barrel, the screw rod are rotatably dispose in the discharge barrel, and the resin of liquid is driven in discharge barrel by the screw rod, along
The direction of motion of the screw rod is pressed out to wedge shape mould.
Step S130 carries out hot-rolling pressure using roller hot-rolling mill to light guide plate blank.
Roller hot-rolling mill includes two and mutually abuts, and rotates opposite pressure roller, by two pressure rollers to two of light guide plate
Opposite surface carries out roll-in, by being heated to light guide plate so that and resin softens, and quality is more fine and close under stress, to
So that the toughness of light guide plate is more preferably.For example, the temperature of the hot-rolling pressure is 90 DEG C to 115 DEG C, for example, the temperature of the hot-rolling pressure
It is 100 DEG C, pressure roller is heated by electric heating so that sheeting roll surface temperature rises, and the temperature of pressure roller is unsuitable excessively high, excessively high
Temperature holds it is easier that resin melting, the temperature of deformation, pressure roller is also unsuitable too low, and too low temperature makes resin that can not soften, and makes
It is bad to obtain pressing effect, therefore, in the present embodiment, hot-rolling pressure is 100 DEG C of the surface temperature of pressure roller, passes through two with light guide plate
Opposite surface contact so that the temperature of light guide plate increases, so that light guide plate softens so that pressing effect is more preferably.
Step S140 carries out right-angled intersection to light guide plate blank and cuts to form multiple light guide plates.
Light guide plate blank has larger area, needs the multiple leaded lights for light guide plate blank cut into pre-set dimension
Plate, so as to following process and packaging.
Step S150, preheats light guide plate.
For example, light guide plate is transmitted by conveyer belt, in the light guide plate transmit process, the temperature of conveyer belt is set
65 DEG C to 85 DEG C are set to, for example, the temperature setting of the conveyer belt is 75 DEG C, by conveyer belt so that light guide plate is in transmit process
In preheated so that the temperature of light guide plate more can slowly be risen to the required temperature of second heat roll-in by initial temperature
Degree, on the one hand can improve the efficiency of heating surface of light guide plate so that light guide plate is when carrying out the second heat roll-in of next step, temperature
Degree can rise to the temperature needed for second heat roll-in and on the other hand provide temperature rise for light guide plate within a short period of time
Buffering area, can to avoid light guide plate in second heat roll-in due to it is lower temperature rapid increase to higher temperature and lead to matter
Ground becomes loose situation, in order to further increase pre-heat effect, for example, the temperature of the conveyer belt is along the advance side of light guide plate
It gradually rises progressively to temperature, in this way, the temperature of light guide plate can be allow to gradually increase so that pre-heat effect is more preferably.
Step S160 carries out second heat roll-in to the light guide plate after preheating.
For example, the temperature of second heat roll-in is 80 DEG C to 110 DEG C, for example, the temperature of second heat roll-in is 95 DEG C, it should manage
Solution, the temperature of second heat roll-in are the temperature of roller surface, are heated to pressure roller by electric heating so that roller surface temperature
Degree rises, and the temperature of pressure roller is unsuitable excessively high, and excessively high temperature holds it is easier that resin melting, deformation, the temperature of pressure roller also should not mistake
Low, too low temperature makes resin that can not soften so that pressing effect is bad, and therefore, in the present embodiment, second heat roll-in is pressed
The surface temperature of roller is 95 DEG C, is contacted by two opposite surfaces with light guide plate so that the temperature of light guide plate increases, to
So that light guide plate softening so that more preferably, one referred to is mentioned that pressing effect, and the temperature of second heat roll-in is compared with hot-rolling in above-mentioned steps
The temperature of pressure is low, and since in above-mentioned steps, light guide plate passes through a hot-rolling pressure, quality has become comparatively dense, such as at this time again
It is secondary that light guide plate is heated with higher temperature, it is easily destroyed the quality of original densification, therefore, second heat roll-in uses hotter than for the first time
The low temperature of roll-in carries out hot-rolling pressure, on the one hand, can light guide plate be softened, the matter without destroying original densification
It ground on the other hand can be further such that light guide plate is more fine and close, to improve the toughness of light guide plate.
Step S170 is put into anti-deformation section to the light guide plate of second heat roll-in, is sent to subsequent processing.
Specifically, higher by the guide-lighting plate temperature after hot-rolling pressure, due to the characteristic of expanding with heat and contract with cold of resin, resin is heated
After easy to produce deformation, after leaving hot-pressing roller, resin easy tos produce rebound when not being pressurized, and leads to deformation, and with gradual
It shapes in cooling process, in order to limit the expansion of resin, avoids light guide plate from generating deformation, in leading after second heat roll-in
Anti- deformation section is set in the transmit process of tabula rasa, light guide plate is limited, light guide plate is avoided to generate excessive deformation.
For example, the multiple anti-deformation sections of setting, for example, multiple anti-deformation sections are placed equidistant with, for example, multiple anti-deformation areas
Between the length for being smaller than light guide plate, in this way so that light guide plate continuous the can enter anti-deformation section in transmit process,
The dilatancy for avoiding light guide plate, in transmit process, the temperature of light guide plate continuously decreases, and obtains cooling aftershaping.
Step S180 cuts light guide plate to form finished product after light guide plate cooling.
For example, the resin in the present embodiment is PMMA (polymethyl methacrylate).Since light guide plate passes through extrusion resin
Forming, therefore resin distribution is more uniformly distributed, and stress is more uniformly distributed, and resin quality is more fine and close, intensity higher, and by twice
Hot-rolling pressure so that the toughness of light guide plate is improved, and is not easy to lose.Due to light guide plate toughness more preferably, intensity higher, therefore,
The thickness of light guide plate can be processed thinner so that briliancy improves.
In one embodiment, the anti-deformation section includes at least two block pressur plates, and two pieces of pressing plates are connected to described
Two opposite surfaces of light guide plate.
For example, light guide plate is transmitted by conveyer belt to subsequent processing, for example, two pieces of pressing plates are arranged in transmission belt
Upper and lower, and be correspondingly arranged, when light guide plate passes through, two upper and lower opposite surfaces of the light guide plate are connected to respectively
Two pieces of pressing plates, limit light guide plate by the pressing plate, prevent light guide plate deformation.
In one embodiment, step S160 further includes：
Light guide plate surface is made to form site by second heat roll-in.
Site can make the light for injecting light guide plate generate refraction and high reflection, so that the dispersion effect of light guide plate
More preferably, the light-conductive rate of light guide plate is improved so that the briliancy of light guide plate is more preferably.For example, raised points are arranged in roller surface, pass through
Raised points suppress to form site in light guide plate surface, for example, raised points are uniformly arranged on roller surface, so that site can be with
It being uniformly distributed so that site scattering is more uniformly distributed, and for another example, on light guide plate blank surface, interval 2mm~6mm suppresses a site,
For example, a site is suppressed in light guide plate blank surface interval 3mm, for example, a diameter of 0.06mm~0.08mm in the site, example
Such as, a diameter of 0.07mm in the site, in this way, the surface of light guide plate blank can be made to be uniformly distributed site so that injection is led
The light of tabula rasa can refract to different directions in the case where different sites acts on, and improve the light-conductive rate of light guide plate.
In one embodiment, further include before step S140：
Step S135 cuts to eliminate burr the edge of light guide plate blank.
Although should be understood that light guide plate blank burr molding by extrusion is less, its edge may still generate
Burr, in order to improve the quality of the light guide plate blank, for example, being cut along the edge of the light guide plate blank to eliminate
Burr.For example, carrying out eliminating the burr at the edge of light guide plate blank in such a way that laser is cut, for example, being eliminated using water knife
The burr of light guide plate blank for another example polishes to the edge of light guide plate blank, to eliminate burr.
In one embodiment, further include after step S135：
Step S136, the surface opposite to two of light guide plate blank carry out pad pasting.For example, using the different electricity of double-sided insulation band
The opposite surface of mode two to light guide plate blank carries out pad pasting.
For example, in two opposite surface pasting protective films of light guide plate blank, surface that can effectively to light guide plate blank
It is protected.
In one embodiment, further include after step silo：
Processing is dried to the resin of liquid in step S115.
In order to reduce the moisture content entrained by resin, after to resin melting, processing is dried to resin, can effectively be subtracted
Moisture content on few resin, avoids moisture from being merged with resin, avoids impacting follow-up resin solidification, for example, being carried out to resin
It air-dries, for example, being dried to resin, for example, drying temperature is 40 DEG C to 50 DEG C, for example, drying time is 30 minutes to 60
Minute.
Light conducting board processing method through the invention, effectively reduces the thickness of light guide plate, and traditional injection type technique adds
The thickness of work into light guide plate is 0.45mm, and the thickness for the light guide plate that the light conducting board processing method of the present invention is process is
0.3mm so that the thickness of light guide plate effectively reduces 33%, and with the reduction of thickness, the briliancy of light guide plate accordingly improves, tradition
Injection type technique be process light guide plate briliancy be 9,450cd/m2, and the present invention light conducting board processing method be process
Light guide plate briliancy be 10,000cd/m2 so that the briliancy of light guide plate improves 6%.
On the other hand, light conducting board processing method through the invention improves the production efficiency of light guide plate.
Since the price for extruding forming machine is low compared with the cost of ejaculator, more extrusion can be set on growth line
Forming machine, to improve production efficiency.In addition, the production efficiency for the ejaculator that the production efficiency of separate unit extrusion forming machine is also more singly talked
It is high.Following table is the contrast table of ejaculator and the odd-numbered day output for the light guide plate for extruding forming machine 5 " and 8 " two kinds of models of production.
As can be seen from the above table, machining light guide plate is shaped by extruding, 5 " and 8 " light guide plate odd-numbered day output difference
260% and 380% are improved, production efficiency greatly improves.
It is that the light guide plate being process using injection type technique is process with processing method through the invention below
The optical characteristic measurement data comparison sheet of light guide plate：
As seen from the above table, the distribution of color and briliancy for the light guide sheet that processing method through the invention is process are distributed
It is more uniformly distributed, variance smaller, light guide effect is more preferably.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of processing method of light guide plate, which is characterized in that include the following steps：
By solid resin melting at the resin of liquid；
Processing is dried to the resin of liquid；
The resin of liquid is squeezed to wedge shape mould, resin is formed by curing the light guide plate blank of wedge shape on wedge shape mould；
Hot-rolling pressure is carried out to light guide plate blank using roller hot-rolling mill, the temperature of the hot-rolling pressure is 100 DEG C；
Right-angled intersection is carried out to light guide plate blank to cut to form multiple light guide plates；
Light guide plate is preheated；
Second heat roll-in is carried out to the light guide plate after preheating, the temperature of second heat roll-in is 95 DEG C；
Anti- deformation section is put into the light guide plate of second heat roll-in, is sent to subsequent processing；
After light guide plate cooling, light guide plate is cut to form finished product.
2. the processing method of light guide plate according to claim 1, which is characterized in that the anti-deformation section includes at least two
Block pressur plate, two pieces of pressing plates are connected to two opposite surfaces of the light guide plate.
3. the processing method of light guide plate according to claim 1, which is characterized in that the light guide plate after described pair of preheating carries out
The step of second heat roll-in further 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, which is characterized in that carrying out cross friendship to light guide plate blank
Further include before the step of fork cutting forms multiple light guide plates：
The edge of light guide plate blank is cut to eliminate burr.
5. the processing method of light guide plate according to claim 4, which is characterized in that in the edge progress to light guide plate blank
Further include step after the step of cutting to eliminate burr：
The surface opposite to two of light guide plate blank carries out pad pasting.
6. the processing method of light guide plate according to claim 1, which is characterized in that described to squeeze the resin of liquid to wedge
On shape mold, resin is in the step of being formed by curing the light guide plate blank of wedge shape on wedge shape mould, using extruding forming machine by liquid
The resin of state is squeezed to wedge shape mould.
7. the processing method of light guide plate according to claim 6, which is characterized in that the extrusion forming machine includes screw rod,
The extrusion forming machine is squeezed the resin of liquid to wedge shape mould by screw rod described in its.
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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 true CN105729841B (en) | 2018-08-17 |
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| 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 |
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