CN201275847Y

CN201275847Y - Injection-molding mold for thin type flake

Info

Publication number: CN201275847Y
Application number: CNU2008201393065U
Authority: CN
Inventors: 李吉生
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-28
Filing date: 2008-10-28
Publication date: 2009-07-22
Anticipated expiration: 2018-10-28

Abstract

The utility model relates to an injection forming mould for thin sheet objects, which comprises a fixed mould base, a movable mould base, a floating template, a movable mould core and a reset device; wherein, the movable mould base is arranged on the position opposite to the fixed mould base; the floating template is arranged between the fixed mould base and the movable mould base, the floating template can be connected with the movable mould base, and provided with a mould cavity with accommodation space, and more than one sliding piece is arranged on the inner periphery wall of the mould cavity; the movable mould core is arranged in the mould cavity and contacted with the sliding pieces, and is coordinated with the floating template and the fixed mould core to generate a mould cavity in closing state; the reset device is arranged between the movable mould base and the movable mould core to enable the movable mould base and the movable mould core to have relative movement, so as to generate a margin gap. Based on the sliding piece and the reset device, the surface accuracy of injection forming is increased, and the forming volume is reduced; meanwhile, the abrasion of mould during injection forming process is reduced.

Description

The ejection shaping die of thin type tablet

Technical field

The ejection shaping die of the relevant a kind of plastic material of the utility model refers to a kind of ejection shaping die that is specially adapted to make the thin type sheet thing especially.

Background technology

Grow with each passing day for the quality requirement of this type of liquid crystal display in market, but because the liquid crystal of panel of LCD itself does not have the characteristics of luminescence, for reaching the effect of demonstration, need provide LCD one planar light source device, as backlight group commonly used, its role is to provide panel of LCD one briliancy sufficient and equally distributed area source, and ordinary consumer promptly is the uniformity and the briliancy of display as the good and bad degree of assessment LCD.

General backlight module is made up of light supply apparatus, LGP, reflecting plate, diffuser plate and prism plate, wherein, light supply apparatus is arranged at a side or two opposite sides, and light source exposed to light-guide plate guides transmission, light source is evenly penetrated by LGP, utilize reflecting plate that the light source that LGP penetrates is reflected into LGP once more again, improve the utilization rate of light source, the light source that makes ejaculation by the diffuser plate and the prism plate of relative LGP exiting surface is even at last.Therefore, the LGP as the light source communication media promptly becomes the important key that influences the uniformity and briliancy.

General LGP can be divided into printing-type and non-printing-type according to the processing procedure principle, and printing-type is the apparatus high reflectance and the material of extinction not on the acryl flat board, stamps circular or square diffusion point at bottom surface of light guide plate with screen painting.General non-printing-type then is to utilize precision die to make LGP behind ejection formation, direct one-body molded densely covered microscopic bumps, and it acts on just like the site.

A kind of ejection shaping die of making LGP of commonly using as shown in Figure 1, it comprises one group of upper and

lower die holder

10,11 that can compress folding relatively, these die shoe 11 tops are provided with a die 12 with LGP shaping groove 121, and these upper bolster 10 inside are provided with one and inject the running channel 101 of described shaping groove 121 for plastics plastics 13.The shaping groove 121 that this kind commonly used ejection shaping die must have certain degree of depth could be with all sites of plastics plastics 13 injection moulding grooves 121, so the thickness of LGP is the degree of depth of shaping groove 121, the shortcoming of this kind ejection shaping die is that the LGP of made can't satisfy the demand of present LCD trend slimming.

Another kind is as shown in Figure 2 commonly used the ejection shaping die of making LGP, and it comprises: one first die holder 20 and second die holder 21, opening and closing movement relatively; At least one die 22, relative fixed is on second die holder 21; And the template 23 of floating, be located between first,

second mould

20,21, and be provided with a die cavity 231 that can therebetween slide for die 22 relatively; This first die holder 20 is provided with one and supplies plastic raw materials to inject the running channel 201 of die cavity 231, and wears a fine setting screw rod 211 and die 22 bottom bolts on second die holder 21.

This kind ejection shaping die is by the degree of depth that changes die cavity 231, plastic raw materials is pushed towards the LGP molding space of die cavity 231, but its shortcoming is that described unsteady template 23 and die 22 belong to closely cooperate, in the relative displacement process up and down of ejection shaping die, the surface accuracy that causes LGP to penetrate easily is not enough and the product yield of making LGP is limited, in addition, the die 22 and the template 23 of floating are damaged in using to go up easily.So make LGP with injection molding method, necessity of improvement mould arranged in fact.

Summary of the invention

Main purpose of the present utility model, aim to provide a kind of ejection shaping die of thin type sheet thing, but between mavable module core, the template of floating and movable die holder, a resetting means is set, the compression limit assembly and the elastic parts of this resetting means inside, but make mavable module core and movable die holder produce compressible or a nargin gap that type is opened, increase the surface accuracy of ejection formation by this, and dwindle the volume that penetrates finished product.

Another purpose of the present utility model, aim to provide a kind of ejection shaping die of thin type sheet thing, but between mavable module core and unsteady template, a sliding part is set, mould is reduced in the consume phenomenon of compression and type open procedure, effectively reduce the cost of die change, increase the yield that finished product is made simultaneously.

For reaching described purpose, the utility model is that it comprises about a kind of ejection shaping die of thin type sheet thing: a fixing die holder, its inner side are provided with a fixing die; One movable die holder, it is arranged at the relative position of described fixedly die holder, and can carry out the action of opening and closing mould; One template of floating, it is arranged between described fixedly die holder and the movable die holder, and is connected with described movable die holder, and this unsteady template is provided with a die cavity that possesses accommodation space, and this die cavity internal perisporium is provided with more than one sliding part; But a mavable module core, it is arranged at, and described die cavity is inner to contact with sliding part, and die produces a die cavity for the plastic material moulding down in the matched moulds state to cooperate described unsteady template to reach fixedly; And a resetting means, but its be arranged between described movable die holder and the mavable module core, but but and described movable die holder and mavable module core are relatively moved nargin gap that the type of generation opens or compress.

In a possible embodiments, described fixedly die holder inside is provided with one and supplies plastic material to inject the running channel of described die cavity.

In a preferred embodiment, described running channel is arranged at the middle position of described fixedly die, and is provided with a cast gate in the running channel end of described fixedly die.

In another possible embodiments, described fixedly die holder and movable die holder are provided with a pan feeding running channel that is connected described die cavity jointly.

In a possible embodiments, described sliding part is provided with a nargin groove in described internal perisporium, but and in this nargin inside grooves one ball that reduces with described mavable module core contact area is set.

In a preferred embodiment, but the opposite face of described fixedly die and mavable module core is provided with the lattice point structure that constitutes optics mechanism.

In a preferred embodiment, described resetting means comprises: more than one compression limit assembly, and it is arranged between described movable die holder and the unsteady template; And more than one elastic parts, but it is arranged between described movable die holder and the mavable module core.

In a possible embodiments, described compression limit assembly is a screw rod.

In a possible embodiments, described elastic parts is the nitrogen spring group.

Advantage of the present utility model is: make mavable module core and movable die holder produce compressible or a nargin gap that type is opened but a resetting means is set, increase the surface accuracy of ejection formation by this, and dwindle the volume that penetrates finished product, and but a sliding part is set between mavable module core and unsteady template, reduce the consume phenomenon of mould at compression and type open procedure, effectively reduce the cost of die change, increase the yield that finished product is made simultaneously.

Description of drawings

Fig. 1 is a kind of structure chart of commonly using the ejection shaping die of LGP;

Fig. 2 is the structure chart that another kind is commonly used the ejection shaping die of LGP;

Fig. 3 is the stereogram of the utility model one preferred embodiment;

Fig. 4 is the cross-section cutaway view of the utility model matched moulds state and jet-out plastic material; And

Fig. 5 A to Fig. 5 D is the schematic flow sheet of the utility model ejection formation.

[primary clustering symbol description]

The 10------upper bolster, 31------is die fixedly,

The 101------running channel, the 32------running channel,

The 11------die shoe, the 33------cast gate,

The 12------die, the movable die holder of 40------,

121------shaping groove, the 50------template of floating,

13------plastics plastics, the 51------sliding part,

20------first die holder, but 60------mavable module core,

The 201------running channel, the 70------resetting means,

21------second die holder, 71------compresses limit assembly,

211------finely tunes screw rod, the 72------elastic parts,

The 22------die, 73------nargin gap,

The 23------template of floating, the 80------die cavity,

The 231------die cavity, the 90------plastic material.

30------is die holder fixedly,

The specific embodiment

For ease of further structure of the present utility model, use and feature thereof being had clear and definite full and accurate understanding of darker one deck and understanding, now enumerate preferred embodiment, conjunction with figs. is described in detail as follows:

At first see also Fig. 3 and Fig. 4, in a preferred embodiment, the ejection shaping die of the utility model thin type sheet thing comprises: a fixing die holder 30; One is arranged at the movable die holder 40 of described fixedly die holder 30 relative positions; One is arranged at the unsteady template 50 between described fixedly die holder 30 and the movable die holder 40, and it is connected with described movable die holder 40; But one is arranged at the mavable module core 60 of described unsteady template 50 inside; But and a resetting means 70 that is arranged between described movable die holder 40 and the mavable module core 60, wherein, but described fixedly die 31, the template of floating 50 and mavable module core 60 produce a die cavity 80 for plastic material 90 moulding down in the matched moulds state.

Described fixedly die holder 30 inner sides are provided with a fixing die 31, and described movable die holder 40 cooperates with described fixedly die holder 30, carries out the action of die sinking or matched moulds.In a possible embodiments, described fixedly die 31 is provided with one and supplies plastic material 90 to inject the running channel 32 of described die cavity 80, described running channel 32 is arranged at the middle position of described fixedly die 31 inside, and be provided with a cast gate 33 in fixing running channel 32 ends of die 31, in another possible embodiments, described fixedly die holder 31 is provided with one jointly with movable die holder 40 and supplies plastic material 90 to inject the running channel 32 of die cavity 80 (figure does not show).

Described unsteady template 50 inside are provided with a die cavity that possesses accommodation space, and this die cavity internal perisporium is provided with more than one sliding part 51, in diagram one possible embodiments, this sliding part 51 has most nargin grooves in the die cavity internal perisporium of described unsteady template 50, but and in this nargin inside grooves be provided with one can with described mavable module core 60 contacted balls.But the contact area by ball and described mavable module core 60 reduces, and effectively reduces the wearing and tearing of compression or type open procedure.

But described mavable module core 60 matches with the sliding part 51 of the die cavity inside of described unsteady template 50, and form an inner groovy with described unsteady template 50, in a preferred embodiment, but described mavable module core 60 is provided with the lattice point structure (figure does not show) that constitutes optics mechanism with the fixing opposite face of die 31.

Described resetting means 70 comprises: more than one compression limit assembly 71, described compression limit assembly 71 are arranged between movable die holder 40 and the floating die holder 50; And more than one elastic parts 72, but described elastic parts 72 is arranged between described movable die holder 40 and the mavable module core 60, and cooperate with described compression limit assembly 71, but make produce between described movable die holder 40 and the mavable module core 60 that a voltage supply is contracted or the type open procedure in the nargin gap 73 that relatively moves, in a preferred embodiment, described compression limit assembly is a screw rod, and described elastic parts 72 is the nitrogen spring group.

See also the schematic flow sheet of the utility model specific embodiment shown in Fig. 5 A to Fig. 5 D, at first earlier movable die holder 40 is moved towards fixing die holder 30 directions, making fixedly, die holder 30 covers mutually with movable die holder 40, but the running channel 32 by fixing die holder 30 inside penetrates plastic material 90 to mavable module core 60, fixedly in the die cavity 80 that the die 31 and the template 50 of floating constitute, by resetting means 70 but mavable module core 60 is moved up again and change the whole thickness of die cavity 80, make plastic material 90 complete all positions, space of injecting die cavity 80 form a slim light guide spare, thin light guide panel with moulding cools off at last, but and thin light guide panel with the back taking-up that is separated from each other of fixing die 31 and mavable module core 60, so, repeat described mode with the LGP ejection formation.

Above illustrated embodiment only is not in a limitative way with the utility model for convenience of description; not from the utility model spirit category; be familiar with industry technical staff various simple and easy distortion and the modification that can do, all must include in the scope of the utility model patent protection.

Claims

1. the ejection shaping die of a thin type sheet thing is characterized in that, its structure comprises:

An one inner side is provided with the fixing fixedly die holder of die;

One is arranged at the movable die holder of described fixedly die holder relative position, and this movable die holder can carry out the action of opening and closing mould;

One is arranged at the unsteady template between described fixedly die holder and the movable die holder, and this unsteady template is connected with described movable die holder, and is provided with a die cavity that possesses accommodation space, and this die cavity internal perisporium is provided with more than one sliding part;

But one is arranged at the mavable module core of described die cavity inside, but should contact with described sliding part by mavable module core, and die produces a die cavity for the plastic material moulding down in the matched moulds state to cooperate described unsteady template to reach fixedly; And

But one is arranged at the resetting means between described movable die holder and the mavable module core, but but this resetting means makes the nargin gap that relatively moves described movable die holder and mavable module core the type of generation opens or compress.

2. the ejection shaping die of thin type sheet thing according to claim 1 is characterized in that: described fixedly die holder inside is provided with one and supplies plastic material to inject the running channel of described die cavity.

3. the ejection shaping die of thin type sheet thing according to claim 2 is characterized in that: described running channel is arranged at the middle position of described fixedly die, and is provided with a cast gate in the running channel end of described fixedly die.

4. the ejection shaping die of thin type sheet thing according to claim 1 is characterized in that: described fixedly die holder and movable die holder are provided with a pan feeding running channel that is connected described die cavity jointly.

5. the ejection shaping die of thin type sheet thing according to claim 1 is characterized in that: described sliding part is provided with a nargin groove in described internal perisporium, but and in this nargin inside grooves one ball that reduces with described mavable module core contact area is set.

6. the ejection shaping die of thin type sheet thing according to claim 1 is characterized in that: but the opposite face of described fixedly die and mavable module core is provided with the lattice point structure that constitutes optics mechanism.

7. the ejection shaping die of thin type sheet thing according to claim 1 is characterized in that: described resetting means comprises: more than one and be arranged at compression limit assembly between described movable die holder and the unsteady template; But and more than one and be arranged at elastic parts between described movable die holder and the mavable module core.

8. the ejection shaping die of thin type sheet thing according to claim 7 is characterized in that: described compression limit assembly is a screw rod.

9. the ejection shaping die of thin type sheet thing according to claim 7 is characterized in that: described elastic parts is the nitrogen spring group.