CN103213239A - Light guide plate making method - Google Patents
Light guide plate making method Download PDFInfo
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- CN103213239A CN103213239A CN2012100170291A CN201210017029A CN103213239A CN 103213239 A CN103213239 A CN 103213239A CN 2012100170291 A CN2012100170291 A CN 2012100170291A CN 201210017029 A CN201210017029 A CN 201210017029A CN 103213239 A CN103213239 A CN 103213239A
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- cast gate
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Abstract
The invention provides a light guide plate making method. A die injection molding process is used for processing, the cavity of a die has at least two sprues, and at least two nozzles are used to inject a rubber compound to the at least two sprues respectively; and the rubber compound injection process comprises a step of opening one of the nozzles and injecting the rubber compound to one corresponding sprue from the one of the nozzles without opening the other ones of the nozzles or using the other ones of the sprues, and a step of opening the other ones of the nozzles corresponding to the other ones of the sprues, and injecting the rubber compound from the other ones of the nozzles when the rubber compound injected by the firstly opened nozzle flows to the other ones of the sprues. A first nozzle is firstly opened and other nozzles are opened when the rubber compound injected by the first nozzle reaches other sprues through utilizing sequential control, and the other nozzles auxiliarily fill the space of the cavity which cannot be reached by the rubber compound injected by the first nozzle, so the injection pressure of the injection rubber compound can be improved, the flow of the rubber compound is balanced, and a combination line is difficult to generate, thereby a light guide plate having a large dimension can be made.
Description
[technical field]
The present invention relates to a kind of LGP manufacturing technology field, relate in particular to a kind of manufacturing method of light conducting board.
[background technology]
LGP as LCD light-source system significant components more and more comes into one's own, and at present LGP is that forming technique below 21 cun belongs to ripe at LCD.But the liquid crystal display screen dimensions develops towards large scale now, and existing forming technique runs into bottleneck, can't satisfy the demand of after market.
[summary of the invention]
The invention provides a kind of method for manufacturing light guide plate of making the large-size LGP.
Other purposes of the present invention and advantage can be further understood from the disclosed technical characterictic of the present invention.
For reaching one of above-mentioned or partly or all purposes or other purposes, one embodiment of the invention propose a kind of manufacturing method of light conducting board, comprise the steps:
Mould is provided, and described mould comprises dynamic model and the cover half that matches with dynamic model, constitutes die cavity between described dynamic model and the cover half, at least two cast gates are set on the described cover half, and one of them cast gate is defined as first cast gate;
Injection moulding machine is provided, and described injection moulding machine comprises respectively and two nozzles of described two cast gate corresponding matching that wherein the nozzle that cooperates with described first cast gate is defined as first nozzle at least at least;
Open first nozzle and in described die cavity, inject sizing material, close first nozzle other nozzles in addition simultaneously by first cast gate;
When the sizing material that penetrates when first nozzle arrives other cast gate places except that first cast gate, open other nozzles accordingly and inject sizing material by described other cast gates in described die cavity, first nozzle is all opened the injection sizing material with other nozzles;
During the full whole described die cavity of sizing material injection, close all nozzles.
Further, other cast gates beyond described first cast gate comprise second cast gate, and other nozzles beyond described first nozzle comprise second nozzle that matches with second cast gate, and described first cast gate and second cast gate lay respectively on two crossing sides of cover half.
Further, described first cast gate to the distance of the intersection of two crossing sides of described cover half less than the distance of second cast gate to the intersection of two crossing sides of described cover half.
Further, described other cast gates except that first cast gate comprise second cast gate and the 3rd cast gate, other nozzles beyond described first nozzle comprise second nozzle that matches with second cast gate and the 3rd nozzle that matches with the 3rd cast gate, described first cast gate, second cast gate and the 3rd cast gate are positioned at the same side of described cover half, and are provided with at interval respectively.
Further, described first cast gate, second cast gate and the 3rd cast gate are arranged side by side, and first cast gate is between second cast gate, the 3rd cast gate.
Further, described first cast gate equates to the distance of second cast gate and the 3rd cast gate.
Further, described at least two nozzles respectively comprise needle and the sprue that is arranged on the described needle limit, and the position that described needle retreats is positioned at the rear side of described sprue.
Further, described at least two nozzles also respectively comprise the heating system at the tip that is arranged at described needle.
Also can adopt following method manufacturing method of light conducting board, use the method for mold injection molding to process, the die cavity of described mould has at least two cast gates, uses at least two nozzles respectively to described at least two cast gates injection sizing material; In the process of the described sizing material of injection, open one of them nozzle earlier and inject described sizing material to the cast gate of correspondence, close other nozzles and other each cast gates do not use, when the described sizing material that the nozzle of opening in the ban penetrates flow to all the other each cast gates, open the nozzle corresponding respectively and inject described sizing material with all the other each cast gates.
Further, described at least two nozzles respectively comprise needle and injection hole, and described needle advances and closes the injection sizing material, and described needle retreats position that the described sizing material of start injection and described needle the retreat rear side at described injection hole.
Utilize SECO, when opening first nozzle earlier and treating that sizing material that first nozzle penetrates arrives other cast gates in described die cavity, open other nozzles again, the sizing material of auxiliary filling first nozzle injection of other nozzles is difficult for the die cavity place of arrival, can improve the mobile generation balance of pressing and making sizing material of penetrating of injection sizing material, and be difficult for producing joint line, thereby can produce larger-size LGP.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
[description of drawings]
Figure 1A-Fig. 1 C is the schematic diagram that present embodiment adopts two cast gate formed light conductive plates;
Fig. 2 A-Fig. 2 C is the schematic diagram that present embodiment adopts three cast gate formed light conductive plates;
Fig. 3 is the present embodiment first structure of nozzle schematic diagram.
[specific embodiment]
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to one of graphic preferred embodiment, can clearly present.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are the directions with reference to annexed drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the present invention.
Please join Figure 1A and Fig. 2 C, embodiments of the invention provide a kind of manufacturing method of light conducting board, and its integral body comprises the steps:
Mould (not shown) is provided, and it comprises dynamic model and the cover half that matches with dynamic model, constitutes die cavity 1 between dynamic model and the cover half, at least two cast gates are set on the cover half, and one of them cast gate is defined as first cast gate 2;
Injection moulding machine (not shown) is provided, and it comprises respectively and two nozzles of described two cast gate corresponding matching that wherein the nozzle that cooperates with described first cast gate is defined as first nozzle 3 at least at least;
Open first nozzle 3 and in die cavity 1, inject sizing material, close first cast gate other nozzles in addition simultaneously by first cast gate 2;
When the sizing material that penetrates when first nozzle 3 arrives other cast gate places except that first cast gate 2, open other nozzles accordingly and pass through other cast gates and inject sizing material in die cavity 1, first nozzle 3 is all opened the injection sizing material with other nozzles;
During the full whole die cavity 1 of sizing material injection, close all nozzles.
It more than is the manufacture method of formed light conductive plate, the cast gate that has two injection sizing materials in die cavity 1 at least, and at least two nozzles of corresponding setting, and utilize SECO first nozzle 3 and other nozzles, when below enumerating quantity when nozzle and being respectively two and three specifically to the method for operating of nozzle.
Please join Figure 1A-Fig. 1 C, when the quantity of cast gate was two, other cast gates except that first cast gate 2 comprised second cast gate 4, and other nozzles except that first nozzle 3 comprise second nozzle 5 that matches with second cast gate 4.First cast gate 2 and second cast gate 4 lay respectively on two crossing sides of cover half.First cast gate 2 to the distance of the intersection of two crossing sides of cover half less than the distance of second cast gate 4 to the intersection of two crossing sides of described cover half.In another embodiment (not shown), first cast gate and second cast gate can be positioned at the cover half same side, do not give unnecessary details herein.
During moulding, open first nozzle 3 earlier and inject sizing material in die cavity 1, sizing material continuously to die cavity 1 deeply, when sizing material arrives the position of second cast gate 4, is opened second nozzle 5.Second nozzle 5 is injected sizing material and promotes the sizing material that first nozzle 3 penetrates deep to die cavity 1 in die cavity 1.After this first nozzle 3, second nozzle 5 are all injected sizing material in die cavity 1.Second nozzle 5 and first nozzle 3 are provided with the sizing material that confuses first nozzle 3 with the sizing material that helps to penetrate at interval and push place away from first cast gate 2 to, when preventing to have only first nozzle 3, because of die cavity 1 is too big can't moulding away from the local sizing material no show still of first cast gate 2 with regard to cooling.The sizing material of second nozzle, 5 auxiliary filling first nozzles, 3 injections is difficult for die cavity 1 place of arrival, can improve the mobile generation balance of pressing and making sizing material of penetrating of injection sizing material.Second nozzle, 5 backs are opened in first nozzle 3 and are caused the problem of joint line in the time of can preventing to open simultaneously, thereby can produce larger-size LGP.
Please join Fig. 2 A-Fig. 2 C, when the quantity of cast gate is three, other cast gates except that first cast gate 2 comprise that other nozzles beyond second cast gate 6 and the 3rd cast gate 7, the first nozzles 3 comprise second nozzle 8 that matches with second cast gate 6 and the 3rd nozzle 9 that matches with the 3rd cast gate 7.First cast gate 2, second cast gate 6 and the 3rd cast gate 7 are positioned at the same side of cover half, and are provided with at interval respectively.First cast gate 2, second cast gate 6 and the 3rd cast gate 7 are arranged side by side, and first cast gate 2 is between second cast gate 6 and the 3rd cast gate 7.And the distance of the distance of first cast gate, 2 to second cast gates 6 and first cast gate, 2 to the 3rd cast gates 7 equates.
During moulding, open first nozzle 3 earlier and inject sizing material in die cavity 1, sizing material continuously to die cavity 1 deeply, when sizing material arrives second cast gate 6 and the 3rd cast gate 7, is opened second nozzle 8 and the 3rd nozzle 9.After this first nozzle 3, second nozzle 8 and the 3rd nozzle 9 are all injected sizing material in die cavity 1.The sizing material that the sizing material that second nozzle 8 and the 3rd nozzle 9 penetrate confuses 3 ejaculations of first nozzle reaches die cavity 1 interior place away from first cast gate 2, in the time of can preventing to have only first nozzle 3, because of die cavity 1 too greatly can't moulding with regard to cooling away from the local sizing material no show still of first cast gate 2.The sizing material of second nozzle 3,3 injections of the 3rd nozzle 9 auxiliary filling first nozzles is difficult for die cavity 1 place of arrival, can improve the mobile generation balance of pressing and making sizing material of penetrating of injection sizing material.Second nozzle 8 and the 3rd nozzle 9 backs are opened in first nozzle 3 and are caused the problem of joint line in the time of can preventing to open simultaneously, thereby can produce larger-size LGP.
Please join Fig. 3, first nozzle 3 and other nozzles are (in the embodiment of Figure 1A-Fig. 1 C, other nozzles except that first nozzle 3 comprise second nozzle 5 that matches with second cast gate 4, embodiment in Fig. 2 A-Fig. 2 C, other nozzles beyond first nozzle 3 comprise second nozzle 8 that matches with second cast gate 6 and the 3rd nozzle 9 that matches with the 3rd cast gate 7) include needle 61 and injection hole 62, needle 61 advances and closes the injection sizing material, needle 61 retreats position that start injection sizing material and needle 61 the retreat rear side at injection hole 62, shorten the service life of needle 61 to prevent sizing material from directly impacting needle 61, and sizing material wraps up needle 61 and produces shunting in the time of can preventing to inject, and then be easy to generate joint line, influence the quality of LGP.
The above, only for the present invention's preferred embodiment, when the scope that can not limit the invention process with this, promptly the simple equivalent of being done according to the present patent application claim and invention description content generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.Arbitrary embodiment of the present invention in addition or claim must not reached whole purposes or advantage or the characteristics that the present invention discloses.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not the interest field that is used for limiting the present invention.In addition, terms such as " first " mentioned in this specification or the claim, " second " and are not to be used for the quantitative upper limit of limiting element or lower limit only in order to the title of name element (element) or distinguish different embodiment or scope.
Claims (10)
1. a manufacturing method of light conducting board is characterized in that, comprises the steps:
Mould is provided, and described mould comprises dynamic model and the cover half that matches with described dynamic model, constitutes die cavity between described dynamic model and the described cover half, at least two cast gates are set on the described cover half, and one of them cast gate is defined as first cast gate;
Injection moulding machine is provided, and described injection moulding machine comprises respectively and two nozzles of described two cast gate corresponding matching that wherein the nozzle that cooperates with described first cast gate is defined as first nozzle at least at least;
Open described first nozzle and in described die cavity, inject sizing material, close described first nozzle other nozzles in addition simultaneously by described first cast gate;
During other cast gate places beyond sizing material that described first nozzle penetrates arrives described first cast gate, open described other nozzles accordingly and inject described sizing material by described other cast gates in described die cavity, described first nozzle and described other nozzles are all opened the described sizing material of injection;
During the full whole described die cavity of described sizing material injection, close all nozzles.
2. manufacturing method of light conducting board according to claim 1, it is characterized in that, described other cast gates beyond described first cast gate comprise second cast gate, described other nozzles beyond described first nozzle comprise second nozzle that matches with described second cast gate, and described first cast gate and described second cast gate lay respectively on two crossing sides of described cover half.
3. manufacturing method of light conducting board according to claim 2 is characterized in that, described first cast gate to the distance of the intersection of two crossing sides of described cover half less than the distance of described second cast gate to the intersection of two crossing sides of described cover half.
4. manufacturing method of light conducting board according to claim 1, it is characterized in that, described other cast gates beyond described first cast gate comprise second cast gate and the 3rd cast gate, described other nozzles beyond described first nozzle comprise second nozzle that matches with described second cast gate and the 3rd nozzle that matches with described the 3rd cast gate, described first cast gate, described second cast gate and described the 3rd cast gate are positioned at the same side of described cover half, and are provided with at interval respectively.
5. manufacturing method of light conducting board according to claim 4 is characterized in that, described first cast gate, described second cast gate and described the 3rd cast gate are arranged side by side, and described first cast gate is between described second cast gate and described the 3rd cast gate.
6. manufacturing method of light conducting board according to claim 5 is characterized in that, described first cast gate is equal to the distance of described the 3rd cast gate to the distance and described first cast gate of described second cast gate.
7. manufacturing method of light conducting board according to claim 1 is characterized in that, described at least two nozzles respectively comprise needle and the sprue that is arranged on the described needle limit, and the position that described needle retreats is positioned at the rear side of described sprue.
8. manufacturing method of light conducting board according to claim 7 is characterized in that, described at least two nozzles also respectively comprise the heating system at the tip that is arranged at described needle.
9. a manufacturing method of light conducting board uses the method for mold injection molding to process, and it is characterized in that the die cavity of described mould has at least two cast gates, uses at least two nozzles respectively to described at least two cast gates injection sizing material; In the process of the described sizing material of injection, open one of them nozzle earlier and inject described sizing material to the cast gate of correspondence, close other nozzles and other each cast gates do not use, when the described sizing material that the nozzle of opening in the ban penetrates flow to all the other each cast gates, open the nozzle corresponding respectively and inject described sizing material with all the other each cast gates.
10. manufacturing method of light conducting board according to claim 9, it is characterized in that, described at least two nozzles respectively comprise needle and injection hole, described needle advances and closes the injection sizing material, and described needle retreats position that the described sizing material of start injection and described needle the retreat rear side at described injection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100170291A CN103213239A (en) | 2012-01-19 | 2012-01-19 | Light guide plate making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100170291A CN103213239A (en) | 2012-01-19 | 2012-01-19 | Light guide plate making method |
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| CN103213239A true CN103213239A (en) | 2013-07-24 |
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| CN2012100170291A Pending CN103213239A (en) | 2012-01-19 | 2012-01-19 | Light guide plate making method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI477832B (en) * | 2013-09-26 | 2015-03-21 | Global Lighting Technology Inc | Lamp, manufacturing method of the lamp, light guide plate of the lamp and manufacturing method of the light guide plate |
| 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 |
| CN108349137A (en) * | 2015-10-20 | 2018-07-31 | 福特汽车公司 | The method for eliminating weld bond by the timing and positioning of cast gate |
| CN109501136A (en) * | 2018-11-21 | 2019-03-22 | Oppo（重庆）智能科技有限公司 | Mold, light guide plate and its processing method, display screen and electronic equipment |
| CN110126197A (en) * | 2019-05-07 | 2019-08-16 | 上海鼎瑞模具科技有限公司 | The preparation method and injection mold of air conditioner air deflector |
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| JPH06254895A (en) * | 1993-03-10 | 1994-09-13 | Honda Motor Co Ltd | Injection molding method |
| JP2008100367A (en) * | 2006-10-17 | 2008-05-01 | Toyo Mach & Metal Co Ltd | Injection molding machine and its control method |
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Patent Citations (3)
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| JPH06254895A (en) * | 1993-03-10 | 1994-09-13 | Honda Motor Co Ltd | Injection molding method |
| JP2008100367A (en) * | 2006-10-17 | 2008-05-01 | Toyo Mach & Metal Co Ltd | Injection molding machine and its control method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI477832B (en) * | 2013-09-26 | 2015-03-21 | Global Lighting Technology Inc | Lamp, manufacturing method of the lamp, light guide plate of the lamp and manufacturing method of the light guide plate |
| CN108349137A (en) * | 2015-10-20 | 2018-07-31 | 福特汽车公司 | The method for eliminating weld bond by the timing and positioning of cast gate |
| US11433580B2 (en) | 2015-10-20 | 2022-09-06 | Ford Motor Company | Method to chase weld lines by timing and positioning of gates |
| 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 |
| CN109501136A (en) * | 2018-11-21 | 2019-03-22 | Oppo（重庆）智能科技有限公司 | Mold, light guide plate and its processing method, display screen and electronic equipment |
| CN109501136B (en) * | 2018-11-21 | 2021-01-19 | Oppo（重庆）智能科技有限公司 | Mold, light guide plate and processing method thereof, display screen and electronic equipment |
| CN110126197A (en) * | 2019-05-07 | 2019-08-16 | 上海鼎瑞模具科技有限公司 | The preparation method and injection mold of air conditioner air deflector |
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Application publication date: 20130724 |