CN102241112A - Injection moulding die for light guide plate - Google Patents
Injection moulding die for light guide plate Download PDFInfo
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- CN102241112A CN102241112A CN2011101820979A CN201110182097A CN102241112A CN 102241112 A CN102241112 A CN 102241112A CN 2011101820979 A CN2011101820979 A CN 2011101820979A CN 201110182097 A CN201110182097 A CN 201110182097A CN 102241112 A CN102241112 A CN 102241112A
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- top board
- moving platen
- injection moulding
- mold insert
- lgp
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Abstract
The invention relates to an injection moulding die for a light guide plate, comprising a movable mould assembly and a fixed mould assembly. The movable mould assembly contains a movable mould plate and a movable mould fixing plate; a piston mold insert is disposed inside the movable mould plate; an injection moulding cavity which communicates with an injection moulding inlet is formed between a transverse plane of the piston mold insert and a transverse plane of the fixed mould plate; the piston mold insert is connected with a first top board through guide posts; the other side of the first top board is fixedly connected with a second top board through fastening bolts; a positioning push rod is also arranged parallel to the guide posts; one end of the positioning push rod is positioned between the first top board and the second top board; the other end of the positioning push rod successively passes through the first top board and the movable mould plate, and the transverse plane of the positioning push rod exceeds the outer transverse plane of the piston mold insert. According to the invention, pressure at all points is uniform during the moulding process of rubber compounds, so as to make the inner stress of the moulded light guide plate low and uniform, solve the problem of nonuniform brightness in light guide plates moulded by present injection moulding dies and accomplish multiple purposes of one die.
Description
Technical field:
The present invention relates to LGP production mould technical field, refer in particular to a kind of injection forming mold of LGP.
Background technology:
Existing LGP injection forming mold, mold cavity is generally directly formed by moving platen and solid plate, and cavity dimension is changeless, need go out the mould of many cover specifications according to the Thickness Design of LGP, every mold can only the moulding fixed thickness LGP, so the die cost of enterprise's cost is higher.Existing light guide plate forming mould, also there is following technical weak point, one, when injection mo(u)lding LGP especially ultrathin LGP, the injection moulding sizing material often takes place penetrate phenomenons such as imbalance, cause LGP internal stress inequality and cause LGP brightness inequality, form defective products easily, cause production cost too high; They are two years old, when the LGP of injection mo(u)lding large-size, because the sizing material flow region is bigger, therefore easily defective such as generating unit subregion injecting glue deficiency (promptly play insatiable hunger, starved, shortly penetrate, insatiable hunger mould), even penetrate pressure bursts and beat fullly by increasing sizing material, still cause the LGP internal stress uneven and form defective products easily.
Summary of the invention:
The objective of the invention is to overcome the above-mentioned weak point of prior art, a kind of injection forming mold of LGP is provided.
The present invention realizes that the technical scheme that its purpose adopts is: a kind of injection forming mold of LGP, this injection forming mold comprise cover half assembly and dynamic model assembly,
Described cover half assembly comprises solid plate, cover half fixed head, and hot mouth runner mechanism is installed, and the hot mouth of hot mouth runner mechanism is positioned on the end face of solid plate;
Described dynamic model assembly includes moving platen, dynamic mould fixing plate, is formed with the injection moulding inlet that is communicated with hot mouth between moving platen and the described solid plate,
Wherein:
In described moving platen, be provided with the piston mold insert, form the injection moulding die cavity that enters the mouth and be communicated with described injection moulding between the end face of this piston mold insert and the end face of described solid plate;
Described piston mold insert is fixedlyed connected with first top board that is arranged between moving platen and the dynamic mould fixing plate by the lead that is located on the moving platen; The opposite side of this first top board also is fixedly connected with second top board by fastening bolt;
Also be provided with a positioning mandril parallel with described lead, an end of this positioning mandril is folded between described first top board and second top board, and the other end passes described first top board, moving platen successively, and its end face exceeds the outer face of described piston mold insert.
Particularly, form the installing space that described first top board, second top board are installed by interval mould pin between described moving platen and the dynamic mould fixing plate.
In the technique scheme, be provided with guiding mechanism between described lead and the moving platen.
Described guiding mechanism is ball guide pillar guide pin bushing external member or linear guides.
After the present invention adopts technique scheme, when the LGP injection mo(u)lding, sizing material injects the moment of injection moulding die cavity, the piston mold insert plays squeezing action to sizing material under the effect of lead, first top board, second top board, flowing of accelerated stock is evenly distributed sizing material rapidly, and makes sizing material pressure uniformity everywhere, thereby make the LGP internal stress after the moulding extremely low and even, solved the uneven problem of LGP brightness of existing injection mold moulding.And, the present invention can be by changing the positioning mandril of different length, regulate the displacement of first top board, second top board and piston mold insert, thereby the thickness of formed light conductive plate can be controlled, promptly at the LGP that need not just can mold under the situation of die change base more multiple thickness, realize one module multiple usages, improve the mould utilization rate greatly, reduce the mould production cost.Therefore, injection mold of the present invention is highly suitable for forming superthin type LGP and large-size light-conducting plate.
Description of drawings:
Fig. 1 is the structural representation of injection forming mold of the present invention;
The working state schematic representation of Fig. 2, Fig. 3 injection forming mold of the present invention.
The specific embodiment:
The present invention is further described below in conjunction with specific embodiments and the drawings.
As shown in Figure 1, the injection forming mold of LGP of the present invention comprises cover half assembly 1 and dynamic model assembly 2, particularly, described cover half assembly 1 comprises solid plate 11, cover half fixed head 12, and hot mouth runner mechanism 13 is installed, the hot mouth 131 of hot mouth runner mechanism 13 is positioned on the outer face of solid plate 11;
Described dynamic model assembly 2 includes moving platen 21, dynamic mould fixing plate 22, forms an installing space 20 by interval mould pin 23 between moving platen 21 and the dynamic mould fixing plate 22; Be formed with the injection moulding inlet 300 that is communicated with the hot mouth 131 of hot mouth runner mechanism 13 between moving platen 21 and the described solid plate 11;
Among the present invention, in described moving platen 21, be provided with piston mold insert 3, this piston mold insert 3 is cuboid, is embedded in the recess of moving platen 21, forms between the outer face of the outer face of this piston mold insert 3 and described moving platen 11 and the described injection moulding 300 injection moulding die cavities 301 that are communicated with that enter the mouth;
Described piston mold insert 3 is fixedlyed connected with first top board 41 during installing space 20 is set by the lead 31 that is located on the solid plate 21, in the present embodiment, one end of lead 31 is embedded in the piston mold insert 3, and the other end is fixedlyed connected with first top board 41 by bolt; Be provided with guiding mechanism 311 between described lead 31 and the solid plate 21, described guiding mechanism 311 can be ball guide pillar guide pin bushing external member or linear guides, and the running resistance that it can reduce lead 31 makes operation more smooth and easy and reduce the wearing and tearing of lead 31;
The opposite side of this first top board 41 also is fixedly connected with second top board 42 by 4 fastening bolts 51; This second top board 42 also is arranged in the described installing space 20, and between first top board 41 and dynamic mould fixing plate 22; The inner face of described dynamic mould fixing plate 22 is provided with four stop screws 221 that limit described second top board 42, its effect is to make between second top board 42 and the dynamic mould fixing plate 22 to have enough gaps, as do not have stop screw 221 and directly contact spacing with second top board 42 by dynamic mould fixing plate 22, extruding can make the two superficial dust, laying dust too much owing to move repeatedly, thereby influences positioning accuracy; Make between the two distance enough greatly by stop screw 221, be difficult for dust stratification and do not influence positioning accuracy.
Also be provided with a positioning mandril 52 parallel with described lead 31, one end of this positioning mandril 52 is folded between described first top board 41 and second top board 42, the other end passes described first top board 41, moving platen 21 successively, and its end face exceeds the outer face of described piston mold insert 3.The effect of positioning mandril 52 is the displacement under the matched moulds state of control first top board 41, second top board 42 and piston mold insert 3, thereby the distance of control piston mold insert 3 and solid plate 11 outer faces, promptly control the thickness of LGP, want the LGP of moulding different-thickness, the positioning mandril 52 that only needs to change different length gets final product, and need not more die change base.
The course of work of accompanying drawings injection forming mold of the present invention more below:
As shown in Figure 1, under original state, when preparing injection moulding, with cover half assembly 1 and dynamic model assembly 2 matched moulds, at this moment, second top board 42 in the dynamic model assembly 1 is positioned at the caging bolt 221 position contacting A places on its outer face and the cover half fixed head 22, and the injection moulding die cavity 301 that forms between the outer face of corresponding piston mold insert 3 and the solid plate 11 is in incompressible state, and promptly the die cavity space is bigger; And also having a determining deviation between the end face of positioning mandril 52 and the solid plate 11, this spacing is the distance that second top board 42, first top board 41 and piston mold insert 3 move under the matched moulds state; After matched moulds is good, sizing material is injected injection moulding inlet 300 and injection moulding die cavity 301 through overheated mouth 131 by the hot mouth runner mechanism 13 on the cover half assembly 1;
In conjunction with shown in Figure 2, inject the moment of injection moulding die cavity 301 at sizing material, (this external force can or utilize other power set to provide by cylinder, oil cylinder, motor by controllable external force, the signal controlling that this device motion is provided by the signal cable of drawing in injection machine opportunity) driving second top board 42 rapidly travels forward, and then drive first top board 41, lead 31 and promote piston mold insert 3 and travel forward, the extruding sizing material; Simultaneously, also the positioning mandril 52 between drive and second top board 42 and first top board 41 moves forward to till the outer face conflict of its end face and solid plate 11, and promptly second top board 42 moves to B place, position; In this process, because the squeezing action of piston mold insert 3 is evenly distributed the sizing material in the injection moulding die cavity 301 rapidly, and the pressure uniformity that sizing material everywhere is subjected to, after the moulding to be cooled, LGP internal stress everywhere is extremely low and even, reaches LGP and uses time even brightness effect.
Again as shown in Figure 3, after the sizing material cooling in injection moulding die cavity 301 and the injection moulding inlet 300, it is die sinking that cover half assembly 1 separates with dynamic model assembly 2 under injection machine drives, at this moment, second top board 42 continues operation forward under the effect of external force, piston mold insert 3 is released forward and then with the LGP of forming and the clout in the injection moulding inlet, and promptly second top board 42 moves to C place, position, like this, the manipulator on the injection machine can be taken LGP away easily; Then, second top board, 42 inverted runnings return back to A place in position among Fig. 1, drive piston mold insert 3, positioning mandril 52 homings simultaneously, finish single injection-molded, and prepare to enter next cycle operation.
In sum, after the present invention adopts technique scheme, when the LGP injection mo(u)lding, sizing material injects the moment of injection moulding die cavity 301, and piston mold insert 3 plays squeezing action to sizing material under the effect of lead 31, first top board 41, second top board 42, the flowing of accelerated stock, sizing material is evenly distributed rapidly, and make sizing material pressure uniformity everywhere, thus make the LGP internal stress after the moulding extremely low and even, solved the uneven problem of LGP brightness of existing injection mold moulding.And, the present invention can be by changing the positioning mandril 52 of different length, regulate the displacement of first top board 41, second top board 42 and piston mold insert 3, thereby the thickness of formed light conductive plate can be controlled, promptly at the LGP that need not just can mold under the situation of die change base more multiple thickness, realize one module multiple usages, improve the mould utilization rate greatly, reduce the mould production cost.Therefore, injection mold of the present invention is highly suitable for forming superthin type LGP and large-size light-conducting plate.
Claims (4)
1. the injection forming mold of a LGP, this injection forming mold comprises cover half assembly (1) and dynamic model assembly (2), wherein,
Described cover half assembly (1) comprises solid plate (11), cover half fixed head (12), and hot mouth runner mechanism (13) is installed, and the hot mouth (131) of hot mouth runner mechanism (13) is positioned on the outer face of solid plate (11);
Described dynamic model assembly (2) includes moving platen (21), dynamic mould fixing plate (22), is formed with the injection moulding inlet (300) that is communicated with hot mouth (131) between moving platen (21) and the described solid plate (11),
It is characterized in that:
In described moving platen (21), be provided with piston mold insert (3), form between the outer face of this piston mold insert (3) and the outer face of described solid plate (11) and the described injection moulding injection moulding die cavity (301) that (300) be communicated with that enters the mouth;
Described piston mold insert (3) is fixedlyed connected with first top board (41) that is arranged between moving platen (21) and the dynamic mould fixing plate (22) by the lead (31) that is located on the moving platen (21); The opposite side of this first top board (41) also is fixedly connected with second top board (42) by fastening bolt (51);
Also be provided with a positioning mandril (52) parallel with described lead (31), one end of this positioning mandril (52) is folded between described first top board (41) and second top board (42), the other end passes described first top board (41), moving platen (21) successively, and its end face exceeds the outer face of described piston mold insert (3).
2. the injection forming mold of a kind of LGP according to claim 1 is characterized in that: form the installing space (20) that described first top board (41), second top board (42) are installed by interval mould pin (23) between described moving platen (21) and the dynamic mould fixing plate (22).
3. the injection forming mold of a kind of LGP according to claim 1 is characterized in that: be provided with guiding mechanism (311) between described lead (31) and the moving platen (21).
4. the injection forming mold of a kind of LGP according to claim 3, it is characterized in that: described guiding mechanism (311) is ball guide pillar guide pin bushing external member or linear guides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110182097.9A CN102241112B (en) | 2011-06-28 | 2011-06-28 | Injection moulding die for light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110182097.9A CN102241112B (en) | 2011-06-28 | 2011-06-28 | Injection moulding die for light guide plate |
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| CN102241112A true CN102241112A (en) | 2011-11-16 |
| CN102241112B CN102241112B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110182097.9A Active CN102241112B (en) | 2011-06-28 | 2011-06-28 | Injection moulding die for light guide plate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107351321A (en) * | 2017-08-07 | 2017-11-17 | 深圳市南极光电子科技有限公司 | A kind of anti-fit structure and application process applied to light guide plate compression mold |
| CN107498788A (en) * | 2017-08-07 | 2017-12-22 | 深圳市南极光电子科技有限公司 | Forming light guide plate method based on compression forming |
| CN107599294A (en) * | 2017-08-07 | 2018-01-19 | 深圳市南极光电子科技有限公司 | Vacuum forming method, light guide plate and mould applied to light guide plate forming mould |
| CN108000813A (en) * | 2017-12-14 | 2018-05-08 | 苏州捷仕达模具科技有限公司 | A kind of injection mold inner core pulling slide block mechanism |
| CN110126201A (en) * | 2019-05-30 | 2019-08-16 | 开平市盈光机电科技有限公司 | A kind of movable type cavity mould with elastic device |
| CN112848113A (en) * | 2021-01-07 | 2021-05-28 | 东莞市元立电子科技有限公司 | Compression mold for oil cylinder of light guide plate |
Citations (4)
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|---|---|---|---|---|
| US4661055A (en) * | 1984-05-23 | 1987-04-28 | Industries Plastiques Maules--IPM | Moulding assembly for the injection of plastic materials |
| CN101444946A (en) * | 2007-11-29 | 2009-06-03 | 株式会社名机制作所 | Forming die for light guide plate |
| CN201800191U (en) * | 2010-05-19 | 2011-04-20 | 牟维军 | Fixed mold ejector two-step parting mold mechanism |
| CN202293187U (en) * | 2011-06-28 | 2012-07-04 | 东莞市现代精工实业有限公司 | Injection molding die for light guide plate |
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2011
- 2011-06-28 CN CN201110182097.9A patent/CN102241112B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4661055A (en) * | 1984-05-23 | 1987-04-28 | Industries Plastiques Maules--IPM | Moulding assembly for the injection of plastic materials |
| CN101444946A (en) * | 2007-11-29 | 2009-06-03 | 株式会社名机制作所 | Forming die for light guide plate |
| CN201800191U (en) * | 2010-05-19 | 2011-04-20 | 牟维军 | Fixed mold ejector two-step parting mold mechanism |
| CN202293187U (en) * | 2011-06-28 | 2012-07-04 | 东莞市现代精工实业有限公司 | Injection molding die for light guide plate |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107351321A (en) * | 2017-08-07 | 2017-11-17 | 深圳市南极光电子科技有限公司 | A kind of anti-fit structure and application process applied to light guide plate compression mold |
| CN107498788A (en) * | 2017-08-07 | 2017-12-22 | 深圳市南极光电子科技有限公司 | Forming light guide plate method based on compression forming |
| CN107599294A (en) * | 2017-08-07 | 2018-01-19 | 深圳市南极光电子科技有限公司 | Vacuum forming method, light guide plate and mould applied to light guide plate forming mould |
| CN107599294B (en) * | 2017-08-07 | 2019-11-12 | 深圳市南极光电子科技股份有限公司 | Vacuum forming method, light guide plate and mold applied to light guide plate forming mould |
| CN107498788B (en) * | 2017-08-07 | 2019-12-06 | 深圳市南极光电子科技股份有限公司 | Light guide plate forming method based on compression forming |
| CN107351321B (en) * | 2017-08-07 | 2023-10-20 | 深圳市南极光电子科技有限公司 | Anti-sticking structure applied to compression forming die of light guide plate and application method |
| CN108000813A (en) * | 2017-12-14 | 2018-05-08 | 苏州捷仕达模具科技有限公司 | A kind of injection mold inner core pulling slide block mechanism |
| CN110126201A (en) * | 2019-05-30 | 2019-08-16 | 开平市盈光机电科技有限公司 | A kind of movable type cavity mould with elastic device |
| CN112848113A (en) * | 2021-01-07 | 2021-05-28 | 东莞市元立电子科技有限公司 | Compression mold for oil cylinder of light guide plate |
Also Published As
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|---|---|
| CN102241112B (en) | 2014-07-23 |
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Address after: 523000 No. 100, Rong Rong Road, Lin Town, Tangxia Town, Guangdong, Dongguan Applicant after: Dongguan Modern Fine Industrial Co.,Ltd. Address before: 1 building, 3 floor, No. 523000, Center Road, Ma Po Industrial Zone, bamboo village, Fenggang Town, Dongguan, Guangdong Applicant before: Dongguan Modern Fine Industrial Co.,Ltd. |
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