CN202293187U

CN202293187U - Injection molding die for light guide plate

Info

Publication number: CN202293187U
Application number: CN2011202216426U
Authority: CN
Inventors: 何建明
Original assignee: DONGGUAN MODERN FINE INDUSTRIAL CO LTD
Current assignee: DONGGUAN MODERN FINE INDUSTRIAL CO LTD
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-07-04
Anticipated expiration: 2021-06-28

Abstract

The utility model relates to an injection molding die for a light guide plate. The injection molding die comprises a moving die assembly and a fixed die assembly, wherein the moving die assembly comprises a fixed die plate and a moving die fixed plate; a piston insert is arranged in the moving die plate; an injection molding cavity which is communicated with an injection molding inlet is formed between the end face of the piston insert and the end face of the moving die plate; the piston insert is fixedly connected with a first top plate by a guide pillar; the other side of the first top plate is fixedly connected with a second top plate by a fastening bolt; a positioning top rod which is parallel to the guide pillar is also arranged in the moving die plate; one end of the positioning top rod is clamped between the first top plate and the second top plate, and the other end of the positioning top rod is penetrated through the first top plate and the moving die plate sequentially; and the end face of the positioning top rod exceeds the outer end face of the piston insert. By the injection molding die, pressure at each position is uniform and consistent in the process of forming sizing materials, so that the internal stress of the formed light guide plate is extremely low and uniform, the problem of non-uniform luminance brightness of the light guide plate formed by the conventional injection molding die is solved, and the die has multiple purposes.

Description

A kind of injection forming mold of LGP

Technical field:

The utility model relates to LGP production mould technical field, refers 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 moulds of many cover specifications according to the Thickness Design of LGP, the LGP that every mold can only the moulding fixed thickness, so the die cost of enterprise's cost is higher.Existing light guide plate forming mould; Technical weak point below also existing, one of which is 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 the LGP brightness uneven, 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 be prone to take place subregion injecting glue defectives such as not enough (promptly play insatiable hunger, starved, shortly penetrate, insatiable hunger mould),, still cause the LGP internal stress uneven and form defective products easily even penetrate pressure bursts and beat fullly through increasing sizing material.

The utility model content:

The purpose of the utility model is to overcome the above-mentioned weak point of prior art, and a kind of injection forming mold of LGP is provided.

The utility model 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,

Said 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;

Said 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 said solid plate,

Wherein:

In said moving platen, be provided with the piston mold insert, form the injection moulding die cavity that enters the mouth and be communicated with said injection moulding between the end face of this piston mold insert and the end face of said solid plate;

Said piston mold insert is fixedly connected with first top board that is arranged between moving platen and the dynamic mould fixing plate through 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 through fastening bolt;

Also be provided with a positioning mandril parallel with said lead, an end of this positioning mandril is folded between said first top board and second top board, and the other end passes said first top board, moving platen successively, and its end face exceeds the outer face of said piston mold insert.

Particularly, form the installing space that said first top board, second top board are installed through interval mould pin between said moving platen and the dynamic mould fixing plate.

In the technique scheme, be provided with guiding mechanism between said lead and the moving platen.

Said guiding mechanism is ball guide pillar guide pin bushing external member or linear guides.

After the utility model adopted technique scheme, when the LGP injection mo(u)lding, sizing material injected 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 utility model can be regulated the displacement of first top board, second top board and piston mold insert, thereby the thickness of formed light conductive plate can be controlled through changing the positioning mandril of different length; 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 die production cost.Therefore, the utility model injection mold is highly suitable for forming superthin type LGP and large-size light-conducting plate.

Description of drawings:

Fig. 1 is the structural representation of the utility model injection forming mold;

The working state schematic representation of Fig. 2, Fig. 3 the utility model injection forming mold.

The specific embodiment:

Below in conjunction with specific embodiment and accompanying drawing the utility model is further specified.

As shown in Figure 1; The injection forming mold of the described LGP of the utility model comprises cover half assembly 1 and dynamic model assembly 2; Particularly; Said 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;

Said dynamic model assembly 2 includes moving platen 21, dynamic mould fixing plate 22, forms an installing space 20 through 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 said solid plate 11;

In the utility model; In said 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 said moving platen 11 and the said injection moulding 300 injection moulding die cavities 301 that are communicated with that enter the mouth;

Said piston mold insert 3 is fixedly connected with first top board 41 during installing space 20 is set through 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 fixedly connected with first top board 41 through bolt; Be provided with guiding mechanism 311 between said lead 31 and the solid plate 21, said 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 through 4 fastening bolts 51; This second top board 42 also is arranged in the said installing space 20, and between first top board 41 and dynamic mould fixing plate 22; The inner face of said dynamic mould fixing plate 22 is provided with four stop screws 221 that limit said 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 lean on dynamic mould fixing plate 22 to contact spacing with second top board 42; 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 through stop screw 221, be difficult for dust stratification and do not influence positioning accuracy.

Also be provided with a positioning mandril 52 parallel with said lead 31; One end of this positioning mandril 52 is folded between said first top board 41 and second top board 42; The other end passes said first top board 41, moving platen 21 successively, and its end face exceeds the outer face of said 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 the utility model injection forming mold 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 under the matched moulds state distance that second top board 42, first top board 41 and piston mold insert 3 move; After matched moulds is good, sizing material is injected injection moulding inlet 300 and injection moulding die cavity 301 through overheated mouth 131 through 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 through controllable external force; The signal controlling that this device motion is provided by the signal cable of in injection machine, drawing opportunity) drives second top board 42 rapidly and travel 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 is everywhere received; After the moulding to be cooled, LGP internal stress everywhere is extremely low and even, reaches LGP and uses time even brightness effect.

As shown in Figure 3 again, 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, accomplish single injection-molded, and prepare to get into next cycle operation.

In sum; After the utility model adopted technique scheme, when the LGP injection mo(u)lding, sizing material injected the moment of injection moulding die cavity 301; Piston mold insert 3 plays squeezing action to sizing material under the effect of lead 31, first top board 41, second top board 42; 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 utility model can be through changing the positioning mandril 52 of different length, regulates 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 die production cost.Therefore, the utility model injection mold is highly suitable for forming superthin type LGP and large-size light-conducting plate.

Claims

1. the injection forming mold of a LGP, this injection forming mold comprises cover half assembly (1) and dynamic model assembly (2), wherein,

Said 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);

Said 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 said solid plate (11),

It is characterized in that:

In said 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 said solid plate (11) and the said injection moulding injection moulding die cavity (301) that (300) be communicated with that enters the mouth;

Said piston mold insert (3) is fixedly connected with first top board (41) that is arranged between moving platen (21) and the dynamic mould fixing plate (22) through 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) through fastening bolt (51);

Also be provided with a positioning mandril (52) parallel with said lead (31); One end of this positioning mandril (52) is folded between said first top board (41) and second top board (42); The other end passes said first top board (41), moving platen (21) successively, and its end face exceeds the outer face of said 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 said first top board (41), second top board (42) are installed through interval mould pin (23) between said 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 said lead (31) and the moving platen (21).

4. the injection forming mold of a kind of LGP according to claim 3 is characterized in that:

Said guiding mechanism (311) is ball guide pillar guide pin bushing external member or linear guides.