CN100462216C

CN100462216C - Light guiding plate mould kernel and light guiding plate mould

Info

Publication number: CN100462216C
Application number: CNB2004100774564A
Authority: CN
Inventors: 陈杰良
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2004-12-11
Filing date: 2004-12-11
Publication date: 2009-02-18
Anticipated expiration: 2024-12-11
Also published as: CN1785648A

Abstract

A mould core for preparing light guide plate is composed of a pair of matched male and female mould cores, between which there is a mould cavity with a top plate. Said mould cavity is formed in the male mould core and said top plate is part of the female mould core. Said male mould is composed of several detachable subcores, which are detached before demoulding to prevent the scratching to light guide plate. A mould set using said mould core is also disclosed.

Description

Light guiding board mould core and light-conducting board mold

[technical field]

The invention relates to a kind of die and mould structure that is used for ejection formation, especially about a kind of die and mould structure that is used to produce LGP.

[background technology]

Module backlight (Backlight Module) is widely used in the consumer products, particularly LCD such as various information, communication as light-source system as the back side light source of electronic product.The operation principle of module backlight is to utilize the optical texture design of LGP that the light of injecting is spread at a certain angle to penetrate and be uniformly distributed in the light-emitting zone, utilize diffuser plate and prism plate to adjust the light visual angle again, to reach the optical characteristics requirement of LCD, as seen, LGP is the key element of module backlight.

At present, manufacturing method of light conducting board mainly is divided into two kinds: printing-type and non-printing-type.Non-printing-type manufacture method adopts acryl material ejection formation mostly, and a plurality of micro optical structures is set to reach the purpose of diffusion light in the bottom surface of LGP with cutting or direct injection mode.Prior art be used for LGP ejection formation die 1 primary structure as shown in Figure 1.This die 1 has a pair of male model benevolence 10 and mother module core 11 to leaning on mutually, is provided with the die cavity (not indicating) that is used for ejection formation between this male model benevolence 10 and the mother module core 11.Be provided with in this mother module core 11 and water road junction (figure does not show) and running channel 13, this waters the road junction and communicates with this die cavity, in order to moulding material is injected die cavity.One push rod 14 passes this male model benevolence 10 and is used for the LGP of ejection formation is ejected.

But prior art is owing to exist friction between the side of the sidewall of die cavity and LGP, and the LGP of moulding is when being ejected by push rod 14, and therefore its side utilizes the light guiding board mould core 1 production LGP of prior art defective products often to occur easily by scratch or pull.

[summary of the invention]

When adopting ejection formation to produce LGP in order to overcome prior art, its side the invention provides and a kind ofly can prevent effectively when the demoulding that the LGP side from being pulled or the light-conducting board mold of scratch easily by the scratch or the shortcoming of pulling during the LGP demoulding.

The technical scheme that technical solution problem of the present invention is adopted is: a kind of light-conducting board mold is provided, and it comprises: a male model plate, a caster, a push rod and a light guiding board mould core; This caster and this male model plate can be mutually to leaning on; This push rod is located in this male model plate; Light guiding board mould core comprises a pair of male model benevolence and mother module core to leaning on mutually, form a die cavity between this male model benevolence and the mother module core, this die cavity has an end face and a cavity volume, this cavity volume is located in the male model benevolence, this end face is that male model benevolence and mother module core are formed by mother module core leaning on the back, this male model benevolence comprises a plurality of submodule groups, and these a plurality of submodule groups can complement each other to form this die cavity, also can be separated from each other; This male model benevolence and mother module core are separately positioned in male model plate and the caster, and this push rod contacts with this male model benevolence and this male model benevolence can be ejected.

Compared with prior art, the invention has the beneficial effects as follows: the male model benevolence of light guiding board mould core of the present invention may be split into a plurality of submodule groups, and these a plurality of submodule groups can closely cooperate, and also can be separated from each other.Therefore these a plurality of submodule groups are separated from each other during the demoulding, have avoided the scratch that produces because of friction between the side of LGP and the die cavity or have pulled problem.

[description of drawings]

Fig. 1 is the structural representation of prior art light guiding board mould core.

Fig. 2 is the cut-away view of light guiding board mould core of the present invention.

Fig. 3 is the schematic perspective view of the male model benevolence of light guiding board mould core of the present invention.

Fig. 4 is the three-dimensional exploded view of the male model benevolence of light guiding board mould core of the present invention.

Fig. 5 is the demoulding schematic diagram that adopts the mould of light guiding board mould core of the present invention.

[specific embodiment]

Seeing also Fig. 2, is the cut-away view of light guiding board mould core of the present invention.Light guiding board mould core of the present invention comprises a pair of male model benevolence 20 and mother module core 30 to leaning on mutually, is provided with a die cavity 50 between this male model benevolence 20 and the mother module core 30.

This die cavity 50 has an end face and a cavity volume.The cavity volume of this die cavity 50 is located within the male model benevolence 20, and its end face is mutual to forming by the respective surfaces of back by mother module core 30 with mother module core 30 by male model benevolence 20.

This mother module core 30 is provided with a running channel 32 and a cast gate (figure does not show).This cast gate communicates with die cavity 50.And be to make the bottom surface of the LGP of ejection formation have required micro optical structure, this mother module core 30 is being provided with the structure that forms the micro-optics pattern with die cavity 50 end face corresponding positions, this structure can be convex or spill or crenellation pattern according to the design needs, also can be V-type or U type pattern.

This male model benevolence 20 may be split into a plurality of submodule groups, and it comprises a base plate 21 and two pairs of side plates 22,23 (side plate 23 sees also Fig. 3 and Fig. 4).These a plurality of submodule groups cooperatively interact, and form the cavity volume of die cavity 50, and can be separated from each other.

Seeing also Fig. 3 and Fig. 4, is the schematic perspective view and the exploded view of the male model benevolence 20 of light guiding board mould core of the present invention.A plurality of submodule groups of this male model benevolence 20 comprise a base plate 21 and two pairs of side plates 23,22.This base plate 21 has a bottom surface 210, a first surface 211 and a second surface 212.This bottom surface 210 is complete planes.This first surface 211 is located at base plate 21 middle parts, and is higher than second surface 212, makes base plate 21 middle parts form a boss 214.These two pairs of

side plates

22,23 are symmetricly set in twos on the second surface 212 of base plate 21 and with boss 214 and lean.The male model benevolence 20 that is made of these a plurality of submodule groups is cubes, and it forms the cavity volume of die cavity 50 around boss 214.

Because LGP exists plate and wedge type, so the first surface 211 of this base plate 21 can be designed to and bottom surface 210 parallel or inclination certain angles.When this first surface 211 and bottom surface 210 were parallel, boss 214 was platforms, and the LGP of moulding is plate LGP.When this first surface 211 and bottom surface 210 inclination certain angles, boss 214 is wedge type platforms, and the LGP of moulding is the wedge type LGP.

Seeing also Fig. 5, is light-conducting board mold and the demoulding schematic diagram that adopts light guiding board mould core of the present invention.This mould comprises a male model plate 60, a caster (figure does not show), at least one push rod 40 and above-mentioned light guiding board mould core.This male model plate 60 can be mutually to leaning on this caster.Be equipped with coolant channel (figure does not show) in this male model plate 60 and this caster.This push rod 40 is located in the male model plate 60.The male model benevolence 20 of this light guiding board mould core is arranged in the male model plate 60, and by male model plate 60 that this each

side plate

22,23 is fixing, forms the cavity volume of die cavity 50.Mother module core 30 is arranged in the caster, thereby can realize with the closed of male model benevolence 20 and separate with caster motion.Because the bottom surface 210 of base plate 21 is complete planes, push rod 40 does not contact and acts directly on the base plate 21 with die cavity 50 in LGP ejection formation process.Therefore, during the demoulding, push rod 40 ejects, and whole male model benevolence 20 can be ejected.After male model benevolence 20 was ejected, base plate 21 separated with

side plate

22,23, and LGP is deviate from naturally.

Compared with prior art, the male model benevolence 20 of light guiding board mould core of the present invention is to be made of a plurality of separable submodule groups, its submodule group is ejected by push rod 40 when the demoulding, and is ejecting the back separation, and LGP of moulding can not deviate under the situation by external force naturally in it.Therefore, adopt light guiding board mould core of the present invention, can effectively prevent to utilize the friction owing to die when the demoulding of prior art ejection formation LGP to be pulled or scratch, reduced the probability that produces defective products.

Claims

1. light-conducting board mold, comprise: a male model plate, one caster, one push rod and a light guiding board mould core, this caster and this male model plate can be mutually to leaning on, this push rod is located in this male model plate, this light guiding board mould core comprises a pair of male model benevolence and mother module core to leaning on mutually, form a die cavity between this male model benevolence and the mother module core, this die cavity has an end face and a cavity volume, this cavity volume is located in the male model benevolence, this end face is that male model benevolence and mother module core are formed by mother module core leaning on the back, this male model benevolence and mother module core are separately positioned in male model plate and the caster, this push rod contacts with this male model benevolence and this male model benevolence can be ejected, it is characterized in that: this male model benevolence comprises a plurality of submodule groups, and these a plurality of submodule groups can complement each other to form this cavity volume, also can be separated from each other.

2. light-conducting board mold as claimed in claim 1 is characterized in that: these a plurality of submodule groups comprise a base plate and two pairs of side plates, and this base plate is provided with a boss, and these two pairs of side plates are oppositely arranged in twos on this base plate and with this boss around boss and lean.

3. light-conducting board mold as claimed in claim 2 is characterized in that: the male model benevolence of this base plate and two pairs of side plate compositions is cubes, and this die cavity is to be surrounded by this base plate and two pairs of side plates.

4. light-conducting board mold as claimed in claim 2 is characterized in that: the boss of this base plate is a platform.

5. light-conducting board mold as claimed in claim 2 is characterized in that: the boss of this base plate is a wedge type platform.

6. light-conducting board mold as claimed in claim 2 is characterized in that: this base plate has a bottom surface, and this bottom surface is a complete plane.

7. light-conducting board mold as claimed in claim 1 is characterized in that: this mother module core is provided with a cast gate, and this cast gate communicates with die cavity.

8. light-conducting board mold as claimed in claim 1 is characterized in that: this mother module core is provided with spill or convex or crenellation pattern in die cavity top side location place.

9. light-conducting board mold as claimed in claim 1 is characterized in that: this mother module core is provided with V-arrangement or U-shaped pattern in die cavity top side location place.

10. light-conducting board mold as claimed in claim 1 is characterized in that: be equipped with coolant channel on this caster and the male model plate.