CN105034283A - Mold, light guiding plate, manufacturing method and device for mold and light guiding plate and display module - Google Patents
Mold, light guiding plate, manufacturing method and device for mold and light guiding plate and display module Download PDFInfo
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- CN105034283A CN105034283A CN201510594424.XA CN201510594424A CN105034283A CN 105034283 A CN105034283 A CN 105034283A CN 201510594424 A CN201510594424 A CN 201510594424A CN 105034283 A CN105034283 A CN 105034283A
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- mould
- light guide
- draining hole
- guide plate
- melted material
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- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 169
- 238000002347 injection Methods 0.000 claims description 51
- 239000007924 injection Substances 0.000 claims description 51
- 238000002360 preparation method Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000003292 glue Substances 0.000 abstract description 20
- 230000003287 optical effect Effects 0.000 abstract description 12
- 239000012768 molten material Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0032—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks sequential injection from multiple gates, e.g. to avoid weld lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
- B29C2045/2709—Gates with a plurality of mould cavity inlets in close proximity
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of display and discloses a mold, a light guiding plate, a manufacturing method and device for the mold and the light guiding plate and a display module. The mold for manufacturing the light guiding plate comprises at least two pouring gates, the light guiding plate is manufactured in the mode that glue is fed through the multiple pouring gates, and the thinner light guiding plate can be manufactured. The mold further comprises at least one drainage opening which is arranged to be correspond to an interface where different strands material flows are converged, molten materials at the converging interface are extruded to the corresponding drainage openings and discharged out of the drainage openings so that different strands of material flow can be well fused at the joined interface, the welding mark is eliminated, and the optical performance of the light guiding plate is ensured. Thus, by means of the technical scheme, the thinner light guiding plate can be manufactured, and the optical performance of the light guiding plate can be ensured.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of mould and light guide plate and preparation method thereof, equipment, display module.
Background technology
Light guide plate is the critical component of liquid crystal screen back light source, and its thickness also constrains the integral thickness of display screen.A lot of backlight manufacturer is all devoted to the manufacturing technology grasping more ultra-thin light guide board, thus guarantees the superiority in market competition.
In prior art, major part light guide plate is all produce by the mode of injection moulding, the raw material producing light guide plate comprise PC (Merlon) and PMMA (acrylic), be the relatively poor resin material of mobility, most of light guide plate manufacturer manufactures the light guide plate goods of thinner thickness by improving injection mold and application high-speed injection molding machine.Because light guide plate is optical module, light guide plate article surface is not allowed to occur the injection defects such as depression, weld mark, so the light guide plate injection mold of large absolutely number is all designed to single note cast gate enter glue.As shown in Figure 1, single note cast gate enters glue mode is that the melted material transmitted through pipeline enters glue, the weld mark produced when there will not be multiply stream to converge by a note cast gate 2.But molten resin material flows in the die cavity of light-conducting board mold 1 ', stroke is longer, and the difficulty that the light guide plate resin that thickness is thinner is full of whole die cavity is larger, thus becomes the bottleneck that ultra-thin light guide board is produced.Glue mode is entered relative to single note cast gate, as shown in Figure 2, it is that multiple note cast gate 2 enters glue simultaneously that many notes cast gate enters glue mode, molten resin material can within the shorter time die cavity of filling mould 1 ', the light guide plate of thinner thickness can be manufactured, and more loose to the conditional request of injection machine molding parameter and mould, ultra-thin light guide board can be produced with the mould of a relative general configuration and injection machine.But need to solve the technical barrier producing weld mark 3 when multiply stream converges.
Summary of the invention
The invention provides a kind of mould and light guide plate and preparation method thereof, equipment, in order to solve many cast gates enter glue mode manufacture light guide plate time, the technical problem of weld mark can be there is.
The present invention also provides a kind of display module, adopts above-mentioned light guide plate, in order to the thickness of thinning module.
For solving the problems of the technologies described above, providing a kind of mould making light guide plate, it is characterized in that in the embodiment of the present invention, described mould comprises at least two note cast gates and at least one draining hole.
Mould as above, preferably, the position between corresponding adjacent two the note cast gates of described draining hole is arranged.
A kind of equipment making light guide plate is also provided in the embodiment of the present invention, comprises:
Mould as above;
Injection device, under the injection parameter preset, inject by described at least two note cast gates the melted material making light guide plate to described mould, the melted material injected by each note cast gate forms one stream, and different stock material stream converges, and is formed and converges interface;
What described draining hole was arranged on different stock material stream converges position corresponding to interface, described in converge interface melted material be extruded to corresponding draining hole, and to discharge from described draining hole;
Curing apparatus, for solidifying the melted material in described mould, forms light guide plate.
Equipment as above, preferably, described injection device comprises:
Sprue;
Multiple branch flow passage is communicated with, and one end of described sprue is communicated with multiple branch flow passage, and described branch flow passage is communicated with corresponding note cast gate.
Equipment as above, preferably, gradually on the direction at described sprue gate, described branch flow passage increases gradually near the internal diameter of the first end of described note cast gate.
Equipment as above, preferably, the structure of described branch flow passage is the first groove, and the shape of cross section that the first end of described branch flow passage is parallel to described first groove bottom land is fan-shaped.
Equipment as above, preferably, the length of described multiple branch flow passage is roughly consistent.
Equipment as above, preferably, described equipment also comprises:
Drainage trap, is communicated with corresponding draining hole, for collecting the melted material of discharging from described draining hole.
Equipment as above, preferably, the structure of described drainage trap is the second groove, and described drainage trap is U-shaped, isosceles trapezoid or semicircle perpendicular to the longitudinal section of described second groove bottom land.
Equipment as above, preferably, described drainage trap is communicated with by sluice way with corresponding draining hole, there is between the surface of described sluice way and described mould an angle being greater than 0 °, make the melted material of discharging from described draining hole can enter corresponding drainage trap at the flows by action of self gravitation.
Also provide a kind of light guide plate in the embodiment of the present invention, adopt equipment as above to obtain.
A kind of display module is also provided in the embodiment of the present invention, comprises light guide plate as above.
A kind of preparation method of mould is also provided in the embodiment of the present invention, comprises:
Described mould makes at least two note cast gates and at least one draining hole.
Preparation method as above, preferably, described preparation method also comprises:
What obtain different stock material stream converges position corresponding to interface;
Described in described mould correspondence, converge interface location make described draining hole.
Preparation method as above, preferably, the step converging position corresponding to interface obtaining different stock material stream comprises:
Under the first injection parameter preset, inject by described at least two note cast gates the melted material making light guide plate to described mould in advance, what obtain different stock material stream converges position corresponding to interface.
A kind of preparation method of light guide plate is also provided in the embodiment of the present invention, comprises:
Adopt claim preparation method as above to make a mould, described mould is for making light guide plate;
Under the second injection parameter preset, the melted material making light guide plate is injected to described mould by described at least two note cast gates, the melted material injected by each note cast gate forms one stream, different stock material stream converges, formation converges interface, and what described draining hole was arranged on different stock material stream converges position corresponding to interface;
The described melted material converging interface is extruded to corresponding draining hole, and discharges from described draining hole;
Solidify the melted material in described mould, form light guide plate.
Preparation method as above, preferably, the step being injected the melted material of making light guide plate by described at least two note cast gates to described mould is specially:
The melted material injected by a sprue is split at least two tributaries, and the melted material in each tributary injects described mould by corresponding note cast gate.
Preparation method as above, preferably, described preparation method also comprises:
The melted material of being discharged by described draining hole is collected corresponding drainage trap.
Preparation method as above, preferably, the method making described mould comprises:
What obtain different stock material stream converges position corresponding to interface, converges interface location and make described draining hole described in described mould correspondence;
The step converging position corresponding to interface obtaining different stock material stream comprises:
Under the first injection parameter preset, inject by described at least two note cast gates the melted material making light guide plate to described mould in advance, what obtain different stock material stream converges position corresponding to interface;
Wherein, the described first injection parameter preset is consistent with the injection parameter that described second presets.
Preparation method as above, preferably, the described first injection parameter preset and the second injection parameter preset comprise injection rate.
Preparation method as above, preferably, the time that setting is preset, when injecting to described mould the melted material making light guide plate by described at least two note cast gates, first close described draining hole, when after the arrival described default time, open described draining hole.
The beneficial effect of technique scheme of the present invention is as follows:
In technique scheme, make the mould of light guide plate and comprise at least two note cast gates, the mode entering glue to note cast gate makes light guide plate more, can make thinner light guide plate.Described mould also comprises at least one draining hole, the interface that the corresponding different stock material stream of described draining hole converges is arranged, the melted material converging interface is extruded to corresponding draining hole, and discharge from described draining hole, different stock material stream is made to can be good at merging in described interface of converging, eliminate weld mark, ensure the optical property of light guide plate.Therefore, thinner light guide plate can be made by technical scheme of the present invention, and the optical property of light guide plate can be ensured.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 represents in prior art that adopting list to note cast gate enters the structural representation that glue mode makes the mould of light guide plate;
Fig. 2 represents in prior art to adopt how note cast gate enters the principle schematic that glue mode makes the light guide plate formation weld mark of the Mold Making of light guide plate;
Fig. 3 represents in the embodiment of the present invention structural representation one of the equipment making light guide plate;
Fig. 4 represents in the embodiment of the present invention structural representation two of the equipment making light guide plate;
Fig. 5 represents the partial structurtes schematic diagram of drainage trap in the embodiment of the present invention;
Fig. 6 represents the position relationship schematic diagram of drainage trap and mould in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 3, provide a kind of mould 1 making light guide plate in the embodiment of the present invention, mould 1 comprises die cavity, at least two note cast gates 2 and at least one draining hole 4, and described note cast gate 2 is communicated with described die cavity with draining hole 4.The melted material (being generally resin melting material) making light guide plate enters glue by multiple note cast gate 2 simultaneously, inject in described die cavity, glue mode is entered relative to single cast gate, melted material can within the shorter time die cavity of filling mould 1, manufacture the light guide plate of thinner thickness, and more loose to the conditional request of injection machine molding parameter and mould, ultra-thin light guide board can be produced with the mould of a relative general configuration and injection machine.
The melted material that each note cast gate 2 injects forms one stream, and different stock material stream converges, and is formed and converges interface.What draining hole 4 was arranged on different stock material stream converges position corresponding to interface, the described melted material converging interface is extruded to corresponding draining hole 4, and discharge from draining hole 4, different stock material stream is made to can be good at merging in described interface of converging, eliminate weld mark, ensure the optical property of light guide plate.
Normally, interface is converged between adjacent two note cast gates 2, then the position setting between corresponding adjacent two the note cast gates 2 of draining hole 4 described in.
Note cast gate 2 number on mould 1 can be arranged according to the thickness requirements of light guide plate.The more many light guide plates being more conducive to shaping thinner thickness of quantity of note cast gate 2, need the melted material flow equilibrium keeping each note cast gate 2 to inject by injection parameters adjustment before making light guide plate.In actual application, the quantity of note cast gate 2 should control within 4, specifically can arrange two note cast gates 2, and the position between corresponding two note cast gates 2 arranges a draining hole 4, as shown in Figure 3.Also can arrange four note cast gates 2, the position between adjacent two the note cast gates 2 of correspondence arranges draining hole 4, as shown in Figure 4.
The equipment making light guide plate in the embodiment of the present invention not only comprises mould 1, also comprises the injection device for injecting melted material and the curing apparatus for solidifying described melted material formation light guide plate.Described injection device, under the second injection parameter preset, injects by least two note cast gates 2 melted material making light guide plate in the die cavity of mould 1.When melted material is filled with the die cavity of mould 1, can be reinjected the melted material of a period of time, corresponding draining hole 4 is extruded to make the melted material converging interface being positioned at different stock material stream, and discharge from draining hole 4, the different stock material streams converging interface described in making can fully merge, and eliminate weld mark phenomenon.Then stop injecting, utilize described curing apparatus to be cured the melted material in the die cavity of mould 1, form light guide plate.
Whether the different stock material streams converging interface described in specifically can being judged by the method for range estimation are fully merged, and do not have weld mark phenomenon.
Because the mould 1 in the embodiment of the present invention comprises multiple note cast gate 2, in order to inject melted material by all note cast gates 2 in the die cavity 10 of mould 1 simultaneously, arrange and comprise a sprue 10 and multiple branch flow passage 11 for the injection device injecting melted material, branch flow passage 11 is communicated with note cast gate 2 one_to_one corresponding.Melted material injects from one end of sprue 10, the other end of sprue 10 is communicated with multiple branch flow passage 11, melted material in sprue 10 is split into multiple tributary through branch flow passage 11, and the melted material in each tributary is injected in the die cavity of mould 1 by corresponding note cast gate 2.Because the injection parameter of the melted material injected by all note cast gates 2 is consistent, can must controls the position that different stock material stream converges interface very well, and ensure that the thickness of light guide plate is uniformly distributed, improve the optical property of light guide plate.Wherein, described injection parameter comprise start to inject time, the injection rate of melted material and the stickiness of melted material.
The length preferably arranging multiple branch flow passage 11 is roughly consistent, is convenient to realize injecting melted material to mould 1, to shorten the time in melted material filling die cavity by all note cast gates 2 simultaneously.In addition, what can also make different stock material stream converges the centre position of interface roughly between adjacent two note cast gates 2, the better setting position that must obtain draining hole 4.
Further, gradually on the direction at sprue gate 2, arranging branch flow passage 11 near the internal diameter of the first end A of note cast gate 2 increases gradually, enters glue overlay area, make the thickness distribution of light guide plate more even for what increase mould 1.Concrete, the structure arranging branch flow passage 11 is the first groove, and the shape of cross section that the first end A of branch flow passage 11 is parallel to described first groove bottom land is fan-shaped.It should be noted that, the structure of branch flow passage 11 is not limited thereto, can also other versions.
Certainly, described injection device is not limited to above-mentioned a kind of form for the runner transmitting melted material, such as, can also be: arrange multiple independently runner and be communicated with note cast gate 2 respectively, control the injection parameter of each runner respectively.
Preferably, the equipment making light guide plate also comprises drainage trap 5, and drainage trap 5 is communicated with corresponding draining hole 4, for collecting the melted material of discharging from draining hole 4, reuses.
Concrete, the structure of drainage trap 5 can be the second groove, and drainage trap 5 is U-shaped, isosceles trapezoid, semicircle or other shapes perpendicular to the longitudinal section of described second groove bottom land, shown in Figure 5.
Further, shown in composition graphs 5 and Fig. 6, arrange drainage trap 5 to be communicated with by sluice way 6 with corresponding draining hole 4, there is between the surface of sluice way 6 and mould 1 angle (as: 7 °) being greater than 0 °, after the melted material converging interface being positioned at different stock material stream is discharged from draining hole 4, corresponding drainage trap 5 can be entered at the flows by action of melted material self gravitation.The instant discharge of draining hole 4 place melted material, can improve the velocity of discharge converging interface melted material, shortens the speed of weld mark, makes thinner light guide plate.
For 5 cun of mobile phone light guide plates, the bottom land of sluice way 6 near one end of draining hole 2 is H/2 lower than the height on mould 1 surface, and be the half of mould 1 thickness H, the length L of sluice way 6 is 4 ~ 5mm, and the groove width D1 of drainage trap 5 and groove depth D2 is 4 ~ 5mm; Wherein H size and D1, D2 size suitably can adjust according to practical application.
In one preferred embodiment, the mould 1 making the equipment of light guide plate comprises at least two note cast gates 2 and at least one draining hole 4, and the centre position between corresponding adjacent two the note cast gates 2 of draining hole 4 is arranged.Injection device for injecting melted material in from the die cavity to mould 1 comprises a sprue 10 and multiple roughly consistent branch flow passage 11, and one end of multiple branch flow passage 11 is communicated with same one end of sprue 10, and the other end is communicated with note cast gate 2 one_to_one corresponding.Melted material injects from the other end of sprue 10, multiple tributary is split into through branch flow passage 11, the melted material in each tributary is injected in the die cavity of mould 1 by corresponding note cast gate 2, forms one stream, different stock material stream to converge interface corresponding with the position of draining hole 4.Thus the injection parameter of all note cast gates is consistent, can must control the position that different stock material stream converges interface very well, and ensure that the thickness of light guide plate is uniformly distributed, improve the optical property of light guide plate.And at least one drainage trap 5 is set, being communicated with corresponding draining hole 4, for collecting the melted material of discharging from draining hole 4, reusing.
As shown in Figure 3, the equipment making light guide plate in the embodiment of the present invention specifically comprises:
Mould 1, comprise die cavity, two note cast gates 2 and at least one draining hole 4, described note cast gate 2 is communicated with described die cavity with draining hole 4, and draining hole 4 is between two note cast gates 2, and the interface that corresponding different stock material stream converges is arranged;
Injection device, comprises a sprue 10 and multiple branch flow passage 11, and branch flow passage 11 is communicated with note cast gate 2 one_to_one corresponding.Melted material injects from one end of sprue 10, the other end of sprue 10 is communicated with multiple branch flow passage 11, melted material in sprue 10 is split into multiple tributary through branch flow passage 11, the melted material in each tributary injects in the die cavity of mould 1 by corresponding note cast gate 2, the melted material injected by each note cast gate forms one stream, different stock material stream converges, and is formed and converges interface.The structure of branch flow passage 11 is the first groove, and the shape of cross section that branch flow passage 11 is parallel to described first groove bottom land near the first end A at sprue gate 2 is fan-shaped, enters glue overlay area for what increase mould 1;
Drainage trap 5, is communicated with by sluice way 6 with corresponding draining hole 4, for collecting the melted material of discharging from draining hole 4, has an angle being greater than 0 ° between the surface of sluice way 6 and mould 1;
Curing apparatus, for solidifying the melted material in described mould, forms light guide plate.
The process of the light guide plate of equipment making described in the embodiment of the present invention is:
First, draining hole 4 is closed;
Then, press-in melted material, described melted material, by sprue 10, is split into multiple tributary through branch flow passage 11, and each flows through corresponding note cast gate 2 and inject in the die cavity of mould 1;
After arriving the time of presetting, open draining hole 4, make to be positioned at the melted material that different stock material stream converges interface and be extruded to corresponding draining hole 4, and discharge from draining hole 4, the different stock material streams converging interface described in making merge, and eliminate weld mark;
The melted material of discharging from draining hole 4 flows into drainage trap 5 by sluice way 6;
In the die cavity of melted material filling mould 1, and different stock material stream converge interface when there is no a weld mark, stop injecting glue;
Utilize the melted material in curing apparatus curing mold 1, form light guide plate.
Concrete, whether the different stock material streams converging interface described in being judged by the method for range estimation are fully merged, and do not have weld mark phenomenon.
By the light guide plate that the said equipment is obtained, there is thinner thickness, and ensure that the optical property of light guide plate.When described light guide plate is applied on display module, the slimming demand of module can be met.
Described display module can for backlight module, liquid crystal display module or other need the device of backlight module.
Based on same inventive concept, also provide a kind of preparation method of mould 1 in the embodiment of the present invention, described preparation method comprises:
Mould 1 makes at least two note cast gates 2 and at least one draining hole 4.
The mould 1 made by above-mentioned steps comprises at least two note cast gates 2 and at least one draining hole 4, the melted material making light guide plate enters glue by multiple note cast gate 2 simultaneously, inject in the die cavity of mould 1, melted material can within the shorter time die cavity of filling mould 1, manufacture the light guide plate of thinner thickness.What draining hole 4 was arranged on different stock material stream converges position corresponding to interface, the described melted material converging interface is extruded to corresponding draining hole 4, and discharge from draining hole 4, different stock material stream is made to can be good at merging in described interface of converging, eliminate weld mark, ensure the optical property of light guide plate.
In the embodiment of the present invention, the preparation method of mould 1 also comprises:
What obtain different stock material stream converges position corresponding to interface;
The position converging interface described in mould 1 correspondence makes draining hole 4.
Above-mentioned steps is used for making draining hole 4 on mould 1, converges position corresponding to interface, can guarantee that draining hole 4 is accurately corresponding from the position converging interface of different stock material stream, improve the effect of elimination weld mark by what obtain different stock material stream.
Concrete, the step converging position corresponding to interface obtaining different stock material stream comprises:
Under the first injection parameter preset, inject by described at least two note cast gates 2 melted material making light guide plate to described mould in advance, what obtain different stock material stream converges position corresponding to interface.
Described first injection parameter preset comprises the injection rate of melted material and the stickiness of melted material.Preferably, second injection parameter preset of the described first injection parameter and melted material during actual fabrication light guide plate preset is consistent, when guaranteeing to make light guide plate difference stock material stream converge interface and the different stock material streams obtained during making draining hole 4 to converge interface location corresponding.
In actual application, what can be obtained different stock material stream by the method estimated converges position corresponding to interface, does lower mark, the melted material in curing mold 1, takes out.Then draining hole 4 is made in this mark, the obtained mould 1 with note cast gate 2 and draining hole 4.And with this mould 1 for template, batch making has the mould 1 of note cast gate 2 and draining hole 4.
Shown in Figure 3, a kind of preparation method of light guide plate is also provided in the embodiment of the present invention, comprises:
Adopt above-mentioned preparation method to make mould 1, mould 1 comprises at least two note cast gates 2 and at least one draining hole 4;
Under the second injection parameter preset, the melted material making light guide plate is injected to mould 1 by least two note cast gates 2, the melted material injected by each note cast gate 2 forms one stream, different stock material stream converges, formation converges interface, and what draining hole 4 was arranged on different stock material stream converges position corresponding to interface;
The described melted material converging interface is extruded to corresponding draining hole 4, and discharges from draining hole 4;
Melted material in curing mold 1, forms light guide plate.
The mode that above-mentioned steps adopts many note cast gates to enter glue forms light guide plate, can make the light guide plate of thinner thickness.The setting of draining hole can be eliminated many note cast gates and enter the weld mark that glue mode formed, and ensures the optical property of light guide plate.
In a concrete embodiment, the step being injected the melted material making light guide plate by least two note cast gates 2 to mould 1 is specially:
The melted material injected by a sprue 10 is split at least two tributaries, and the melted material in each tributary injects described mould by corresponding note cast gate 2.
In above-mentioned steps, the melted material injected by all note cast gates 2 is the tributary that in same sprue 10, melted material is split into, make the injection parameter of all note cast gate 2 correspondences consistent, can must control the position that different stock material stream converges interface very well, and ensure that the thickness of light guide plate is uniformly distributed, improve the optical property of light guide plate.Wherein, described injection parameter comprise start to inject time, the injection rate of melted material and the stickiness of melted material.
Due to the initial stage in injection moulding, mainly complete the die cavity of melted material filling mould 1, at injection moulding later stage, melted material good for weld mark region incomplete fusion can be discharged by draining hole 4.Correspondingly, the method making light guide plate comprises:
The time that setting is preset, when injecting to mould 1 melted material making light guide plate by described at least two note cast gates 2, first closing draining hole 4, when after the arrival described default time, opening draining hole 4.
Wherein, note cast gate 2 and draining hole 4 are positioned at the same side of mould 1, the described default time can to extend to time needed for relative opposite side for the interface of converging of different stock material from the side at note cast gate 2 place of mould 1, ensure that melted material fills the die cavity of mould 1 completely, and then converge the melted material that the different stock material stream in interface do not merged completely discharge described from draining hole 4.
Enter to eliminate many note cast gates the phenomenon that light guide plate that glue mode makes has weld mark in the embodiment of the present invention, the melted material that draining hole 4 has not merged for discharging weld mark region is set, the melted material in weld mark region is fully merged, eliminates weld mark phenomenon.But the melted material be discharged can cause the waste of material, increase the cost of manufacture of light guide plate.In order to solve the problems of the technologies described above, in the embodiment of the present invention, the preparation method of light guide plate also comprises:
The melted material of being discharged by draining hole 4 is collected corresponding drainage trap 5, for recycling, reduce the cost of manufacture of light guide plate.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (21)
1. make a mould for light guide plate, it is characterized in that, described mould comprises at least two note cast gates and at least one draining hole.
2. mould according to claim 1, is characterized in that, the position between corresponding adjacent two the note cast gates of described draining hole is arranged.
3. make an equipment for light guide plate, it is characterized in that, comprising:
Mould described in claim 1 or 2;
Injection device, under the injection parameter preset, inject by described at least two note cast gates the melted material making light guide plate to described mould, the melted material injected by each note cast gate forms one stream, and different stock material stream converges, and is formed and converges interface;
What described draining hole was arranged on different stock material stream converges position corresponding to interface, described in converge interface melted material be extruded to corresponding draining hole, and to discharge from described draining hole;
Curing apparatus, for solidifying the melted material in described mould, forms light guide plate.
4. equipment according to claim 3, is characterized in that, described injection device comprises:
Sprue;
Multiple branch flow passage is communicated with, and one end of described sprue is communicated with multiple branch flow passage, and described branch flow passage is communicated with corresponding note cast gate.
5. equipment according to claim 4, is characterized in that, gradually on the direction at described sprue gate, described branch flow passage increases gradually near the internal diameter of the first end of described note cast gate.
6. equipment according to claim 5, is characterized in that, the structure of described branch flow passage is the first groove, and the shape of cross section that the first end of described branch flow passage is parallel to described first groove bottom land is fan-shaped.
7. equipment according to claim 4, is characterized in that, the length of described multiple branch flow passage is roughly consistent.
8. the equipment according to any one of claim 3-7, is characterized in that, described equipment also comprises:
Drainage trap, is communicated with corresponding draining hole, for collecting the melted material of discharging from described draining hole.
9. equipment according to claim 8, is characterized in that, the structure of described drainage trap is the second groove, and described drainage trap is U-shaped, isosceles trapezoid or semicircle perpendicular to the longitudinal section of described second groove bottom land.
10. equipment according to claim 8, it is characterized in that, described drainage trap is communicated with by sluice way with corresponding draining hole, there is between the surface of described sluice way and described mould an angle being greater than 0 °, make the melted material of discharging from described draining hole can enter corresponding drainage trap at the flows by action of self gravitation.
11. 1 kinds of light guide plates, is characterized in that, adopt the equipment described in any one of claim 3-10 to obtain.
12. 1 kinds of display modules, is characterized in that, comprise light guide plate according to claim 11.
The preparation method of 13. 1 kinds of moulds, is characterized in that, comprising:
Described mould makes at least two note cast gates and at least one draining hole.
14. preparation methods according to claim 13, is characterized in that, described preparation method also comprises:
What obtain different stock material stream converges position corresponding to interface;
Described in described mould correspondence, converge interface location make described draining hole.
15. preparation methods according to claim 14, is characterized in that, the step converging position corresponding to interface obtaining different stock material stream comprises:
Under the first injection parameter preset, inject by described at least two note cast gates the melted material making light guide plate to described mould in advance, what obtain different stock material stream converges position corresponding to interface.
The preparation method of 16. 1 kinds of light guide plates, is characterized in that, comprising:
Adopt the preparation method described in any one of claim 13-15 to make a mould, described mould is for making light guide plate;
Under the second injection parameter preset, the melted material making light guide plate is injected to described mould by described at least two note cast gates, the melted material injected by each note cast gate forms one stream, different stock material stream converges, formation converges interface, and what described draining hole was arranged on different stock material stream converges position corresponding to interface;
The described melted material converging interface is extruded to corresponding draining hole, and discharges from described draining hole;
Solidify the melted material in described mould, form light guide plate.
17. preparation methods according to claim 16, is characterized in that, the step being injected the melted material of making light guide plate by described at least two note cast gates to described mould is specially:
The melted material injected by a sprue is split at least two tributaries, and the melted material in each tributary injects described mould by corresponding note cast gate.
18. preparation methods according to claim 16, is characterized in that, described preparation method also comprises:
The melted material of being discharged by described draining hole is collected corresponding drainage trap.
19. preparation methods according to claim 16, is characterized in that, the method making described mould comprises:
What obtain different stock material stream converges position corresponding to interface, converges interface location and make described draining hole described in described mould correspondence;
The step converging position corresponding to interface obtaining different stock material stream comprises:
Under the first injection parameter preset, inject by described at least two note cast gates the melted material making light guide plate to described mould in advance, what obtain different stock material stream converges position corresponding to interface;
Wherein, the described first injection parameter preset is consistent with the injection parameter that described second presets.
20. preparation methods according to claim 19, is characterized in that, the described first injection parameter preset and the second injection parameter preset comprise injection rate.
21. preparation methods according to any one of claim 16-20, it is characterized in that, the time that setting is preset, when injecting to described mould the melted material making light guide plate by described at least two note cast gates, first described draining hole is closed, when after the arrival described default time, open described draining hole.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493916A (en) * | 2016-12-28 | 2017-03-15 | 深圳天珑无线科技有限公司 | Injection mold, the process equipment of shell and shell semi-finished product |
| CN106514964A (en) * | 2016-10-14 | 2017-03-22 | 深圳天珑无线科技有限公司 | Side wall side-by-side intra-mold automatic water nozzle cutting structure |
| CN109324367A (en) * | 2018-11-22 | 2019-02-12 | 厦门天马微电子有限公司 | Light guide plate and its injection forming mold and method, backlight module, display device |
| CN109613636A (en) * | 2018-12-28 | 2019-04-12 | 深圳Tcl数字技术有限公司 | Light diffusing sheet manufacturing method, light diffusing sheet and backlight module |
| CN111300756A (en) * | 2020-03-05 | 2020-06-19 | 上汽通用汽车有限公司 | Temperature control injection mold and spraying-free injection molding method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201380578Y (en) * | 2009-03-05 | 2010-01-13 | 东莞市亚通光电有限公司 | Injection mold of ultrathin light guide plate |
| CN101885222A (en) * | 2009-05-13 | 2010-11-17 | 鸿富锦精密工业（深圳）有限公司 | Injection molding device |
| CN101893527A (en) * | 2009-05-22 | 2010-11-24 | 苏州禾盛新型材料股份有限公司 | Plastic test sample mold capable of forming weld mark |
| CN102275259A (en) * | 2011-05-04 | 2011-12-14 | 苏州腾行精密模具有限公司 | Flashing groove for sector gate mold |
| CN104354273A (en) * | 2014-10-24 | 2015-02-18 | 宁波天龙电子股份有限公司 | Plastic mold with automatically separated material overflow structure |
| CN205112277U (en) * | 2015-09-17 | 2016-03-30 | 京东方科技集团股份有限公司 | Mould and light guide plate and preparation equipment, display module assembly thereof |
-
2015
- 2015-09-17 CN CN201510594424.XA patent/CN105034283A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201380578Y (en) * | 2009-03-05 | 2010-01-13 | 东莞市亚通光电有限公司 | Injection mold of ultrathin light guide plate |
| CN101885222A (en) * | 2009-05-13 | 2010-11-17 | 鸿富锦精密工业（深圳）有限公司 | Injection molding device |
| CN101893527A (en) * | 2009-05-22 | 2010-11-24 | 苏州禾盛新型材料股份有限公司 | Plastic test sample mold capable of forming weld mark |
| CN102275259A (en) * | 2011-05-04 | 2011-12-14 | 苏州腾行精密模具有限公司 | Flashing groove for sector gate mold |
| CN104354273A (en) * | 2014-10-24 | 2015-02-18 | 宁波天龙电子股份有限公司 | Plastic mold with automatically separated material overflow structure |
| CN205112277U (en) * | 2015-09-17 | 2016-03-30 | 京东方科技集团股份有限公司 | Mould and light guide plate and preparation equipment, display module assembly thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514964A (en) * | 2016-10-14 | 2017-03-22 | 深圳天珑无线科技有限公司 | Side wall side-by-side intra-mold automatic water nozzle cutting structure |
| CN106493916A (en) * | 2016-12-28 | 2017-03-15 | 深圳天珑无线科技有限公司 | Injection mold, the process equipment of shell and shell semi-finished product |
| CN109324367A (en) * | 2018-11-22 | 2019-02-12 | 厦门天马微电子有限公司 | Light guide plate and its injection forming mold and method, backlight module, display device |
| CN109613636A (en) * | 2018-12-28 | 2019-04-12 | 深圳Tcl数字技术有限公司 | Light diffusing sheet manufacturing method, light diffusing sheet and backlight module |
| CN111300756A (en) * | 2020-03-05 | 2020-06-19 | 上汽通用汽车有限公司 | Temperature control injection mold and spraying-free injection molding method |
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