CN201086380Y

CN201086380Y - Injection molding mold of two-sided light conducting plate

Info

Publication number: CN201086380Y
Application number: CNU2007200555655U
Authority: CN
Inventors: 黄柯
Original assignee: GUANGZHOU LASER-DISCTECH Co Ltd
Current assignee: GUANGZHOU LASER-DISCTECH Co Ltd
Priority date: 2007-08-15
Filing date: 2007-08-15
Publication date: 2008-07-16
Anticipated expiration: 2017-08-15

Abstract

The utility model relates to an injection molding mould of a double-sided light guiding plate, which comprises a fixed die core and a moving die core. A mastering disk is arranged between the fixed die core and a moving die core; either the moving die core or the fixed die core has a molding surface with a V-CUT structure, and the surface of the other die core is provided with a DLC film coating; the surface on the side of the mastering disk is fixed on the die core surface provided with the DLC film coating through a vacuum suction method, and the surface on the other side of the mastering disk is provided with micro-structure array. The mastering disk provided with the micro-structure array supersedes the traditional die core provided with the micro-structure array, and the method of the micro-structure array can be changed by replacing the mastering disk, therefore, the product thereof can achieve different optical effects. When a user needs using different micro-structure arrays, the mastering disk only needs to be replaced without replacing the whole die core, and the mastering disk is easy to be replaced, thereby greatly lowering the use cost.

Description

A kind of injection forming mold of double-sided light guide plate

Technical field

The utility model relates to a kind of injection forming mold of LGP, and particularly a kind of one side is a micro structure array, and another side is the injection forming mold of the double-sided light guide plate of V-CUT structure.

Background technology

Popular on the market LGP is generally single face micro structure array or single face V-CUT structure at present, need increase the requirement that two-layer brightness enhancement film could satisfy brightness in module backlight, and the brightness enhancement film cost accounts for 1/4 of entire aphototropism mould cost; Double-sided light guide plate then one side has micro structure array, another side then is unidirectional or two-way quadrature V-CUT structure, has increased the cycle-index of light in LGP inside, has improved the utilization rate of luminous energy greatly, can use one deck brightness enhancement film less, reduce the cost of module backlight.In general, V-CUT structure relative fixed, and micro structure array is diversified, can reach different optical effects by different array way.

Print process, jet forming method or Outshooting compression shaping method etc. are generally adopted in LGP production, the micro-structural that has definite shape are copied on the plane of LGP.The high-accuracy core rod of needs such as the dimensional accuracy of these micro-structurals guarantees, and in the prior art, this type of core rod adopts mould steel mostly, its processing technology is comparatively complicated, and the replacing time is longer, the cost of making and using is quite high, as shown in Figure 6, common LGP injection mold generally has cover half core 41 and moving-mould-core 42, cover half core 41 and moving-mould-core 42 are formed the part of die cavity 43, the structure of LGP or duplicate from cover half core 41 end faces or from moving-mould-core 42 end faces, mould structure is comparatively simple, but its core rod manufacturing process is comparatively complicated.

The utility model content

The utility model is intended to overcome above-mentioned the deficiencies in the prior art, a kind of forming surface of using stamper to replace traditional core rod is provided, not only on the dimensional accuracy of micro-structural and processing stability, great raising is arranged, and be easy to change stamper, greatly reduced the injection forming mold of the double-sided light guide plate of manufacturing cost and use cost.

The injection forming mold of a kind of double-sided light guide plate that provides according to the utility model, comprise cover half core and moving-mould-core, be provided with stamper between described cover half core and the moving-mould-core, one molded surface is the V-CUT structure in moving-mould-core and the cover half core, another part surface has the DLC plated film, one side surface of described stamper is fixed on the core surface with DLC plated film by the mode of vacuum attraction, and the opposite side surface of described stamper has micro structure array.

The utility model also has following additional technical feature:

Described surface is adopted on the core rod of DLC plated film and is had some cannelures, and the path of the vacuum attraction that communicates with cannelure is arranged in the core rod.

The surface adopts the core rod outer ring of DLC plated film to be provided with spacing ring, and spacing ring is than the high 270um～350um of core rod.

Molded surface has the core rod outer ring of V-CUT structure to be provided with the die cavity ring to be mated.

Described V-CUT structure is unidirectional or two-way quadrature setting.

Distance in the described V-CUT structure between adjacent two strips " V " the shape groove lowermost end is between 40～60 microns, and each " V " shape bottom land end angle is between 80～100 degree.

Distance in the described V-CUT structure between adjacent two strips " V " the shape groove lowermost end is 50 microns, and each " V " shape bottom land end angle is 90 degree.

The utility model compared with prior art, have following advantage: the described stamper that has micro structure array has replaced traditional core rod with micro structure array, can change the mode of micro structure array by the mode of changing stamper, thereby its goods can reach different optical effects.When the user need use different micro structure array, need not change whole core rod, only need to change a stamper and get final product, and be easy to replacing and greatly reduce use cost; The manufacturing technology of stamper is very ripe in the CD industry, and it utilizes the electrolytic deposition principle of metal to realize accurately duplicating, and stable accuracy and processing cost are lower.The described core rod end face that is used for fixing stamper is pure flat processing, more traditional micro structure array core rod that has, processing technology is very simple, and adopt the DLC plated film, case hardness can reach more than the HV2500, coefficient of friction can be reduced to below 0.1, has increased the service life of core rod and stamper so greatly.

Description of drawings

Embodiment below in conjunction with accompanying drawing provides describes the utility model in detail, wherein:

The core rod schematic diagram that has unidirectional V-CUT structure in a kind of preferred embodiment of Fig. 1 for the injection forming mold of a kind of double-sided light guide plate of the utility model;

The core rod schematic diagram that has two-way quadrature V-CUT structure in a kind of preferred embodiment of Fig. 2 for the injection forming mold of a kind of double-sided light guide plate of the utility model;

Fig. 3 is the structural representation of cover half core in a kind of preferred embodiment of injection forming mold of a kind of double-sided light guide plate of the utility model;

Fig. 4 is an A place enlarged diagram among Fig. 3;

Fig. 5 is the schematic top plan view of Fig. 3;

Fig. 6 is the structural representation of moving-mould-core in a kind of preferred embodiment of injection forming mold of a kind of double-sided light guide plate of the utility model;

Fig. 7 is a B place enlarged diagram among Fig. 6.

The specific embodiment

Referring to Fig. 1 to Fig. 7, a kind of preferred embodiment of the injection forming mold of a kind of double-sided light guide plate of the utility model is shown, comprise cover half core (1) and moving-mould-core (3), be provided with stamper (2) between described cover half core (1) and the moving-mould-core (3), one molded surface is the V-CUT structure in moving-mould-core (3) and the cover half core (1), described V-CUT structure is unidirectional or two-way quadrature setting, and molded surface has the core rod outer ring of V-CUT structure to be provided with die cavity ring (30) to be mated; Another part surface has the DLC plated film, the surface adopts the core rod outer ring of DLC plated film to be provided with spacing ring (10), spacing ring is than the high 270um～350um of core rod, have some cannelures (4) on the core rod of described surface employing DLC plated film, the path (40) that the vacuum attraction that communicates with cannelure is arranged in the core rod, one side surface of described stamper (2) is fixed on the core surface with DLC plated film by the mode of vacuum attraction, and the opposite side surface of described stamper (2) has micro structure array.The described stamper that has micro structure array has replaced traditional core rod with micro structure array, can change the mode of micro structure array by the mode of changing stamper, thereby its goods can reach different optical effects.When the user need use different micro structure array, need not change whole core rod, only need to change a stamper and get final product, and be easy to replacing, greatly reduce use cost; The manufacturing technology of stamper is very ripe in the CD industry, and it utilizes the electrolytic deposition principle of metal to realize accurately duplicating, and stable accuracy and processing cost are lower.The described core rod end face that is used for fixing stamper is pure flat processing, more traditional micro structure array core rod that has, processing technology is very simple, and adopt the DLC plated film, case hardness can reach more than the HV2500, coefficient of friction can be reduced to below 0.1, has increased the service life of core rod and stamper so greatly.

Distance in the described V-CUT structure between adjacent two strips " V " shape grooves (31) lowermost end is between 40～60 microns, and each " V " shape groove (31) bottom angle is between 80～100 degree.Preferred distance in the described V-CUT structure between adjacent two strips " V " shape grooves (31) lowermost end is 50 microns, and each preferred angle in " V " shape groove (31) bottom is 90 degree.

The foregoing description is only for the usefulness that the utility model is described; and be not to be to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1. the injection forming mold of a double-sided light guide plate, comprise cover half core (1) and moving-mould-core (3), it is characterized in that being provided with stamper (2) between described cover half core (1) and the moving-mould-core (3), one molded surface is the V-CUT structure in moving-mould-core (3) and the cover half core (1), another part surface has the DLC plated film, one side surface of described stamper (2) is fixed on the core surface with DLC plated film by the mode of vacuum attraction, and the opposite side surface of described stamper (2) has micro structure array.

2. the injection forming mold of double-sided light guide plate according to claim 1 is characterized in that described surface is adopted on the core rod of DLC plated film to have some cannelures (4), and the path (40) of the vacuum attraction that communicates with cannelure is arranged in the core rod.

3. the injection forming mold of double-sided light guide plate according to claim 1 and 2 is characterized in that the core rod outer ring of surface employing DLC plated film is provided with spacing ring (10), and spacing ring is than the high 270um～350um of core rod.

4. the injection forming mold of double-sided light guide plate according to claim 1 and 2 is characterized in that molded surface has the core rod outer ring of V-CUT structure to be provided with die cavity ring (30) and is mated.

5. the injection forming mold of double-sided light guide plate according to claim 1 and 2 is characterized in that described V-CUT structure is unidirectional or two-way quadrature setting.

6. the injection forming mold of double-sided light guide plate according to claim 1 and 2, it is characterized in that the distance between two strips " V " shape grooves (31) lowermost end adjacent in the described V-CUT structure is between 40～60 microns, each " V " shape groove (31) bottom angle is between 80～100 degree.

7. the injection forming mold of double-sided light guide plate according to claim 6 is characterized in that the distance between two strips " V " shape grooves (31) lowermost end adjacent in the described V-CUT structure is 50 microns, and each " V " shape groove (31) bottom angle is 90 degree.