Runner system for production of ultrathin light guide plate

A technology of light guide plate and flow channel, applied in the field of flow channel system, can solve the problems of inability to guarantee the optical dot replication rate, low pressure of molten plastic fluid, unable to fill the cavity, etc., so as to improve the quality of ultra-thin plates, improve fluidity, The effect of reducing pressure loss

Inactive Publication Date: 2015-12-16
LITEGO OPTICAL TECH CO LTD DONGGUAN BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molten plastic flows through the sprue, runner and gate, resulting in a large temperature and pressure loss
The temperature of the molten plastic fluid in the mold cavity is low and the pressure is low so that the cavity cannot be filled, or even if the cavity is filled, the reproduction rate of the optical dots cannot be guaranteed

Method used

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  • Runner system for production of ultrathin light guide plate
  • Runner system for production of ultrathin light guide plate
  • Runner system for production of ultrathin light guide plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , a runner system for ultra-thin light guide plate production, the runner system includes a main channel 1, a runner and a gate, the main channel communicates with the runner, the runner communicates with the gate, and the gate The gate is a "wedge" gate 4, the "wedge" gate includes a feed end 40 and a discharge end 41, the height of the feed end is greater than the height of the discharge end, and the angle α of the "wedge" gate is 60°, the width w of the "wedge" gate is 0.15mm, and the height h of the discharge end of the "wedge" gate is 0.1mm;

[0025] The height of the glue outlet gap is equal to the height of the feed end of the "wedge" gate.

[0026] The runner is an "I"-shaped runner, and the "I"-shaped runner includes a first runner 2 in a vertical direction and two second runners 3 in a horizontal direction; the main channel It communicates with the middle part of the first flow channel, and the two ends of the first flow channel respectively com...

Embodiment 2

[0031] A flow channel system for the production of ultra-thin light guide plates, the two ends of the second flow channel and the positions between the two glue outlet gaps are provided with cold material areas, and the rest of the structure and parameters are the same as in Example 1.

Embodiment 3

[0033] A flow channel system for the production of ultra-thin light guide plates, the shape of the glue outlet gap is rectangular, and the rest of the structure and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a runner system for production of an ultrathin light guide plate. The runner system comprises a main runner, branch runners and sprues. The main runner is communicated with the branch runners which are communicated with the sprues. The runner system is characterized in that the sprues are wedged sprues, each wedged sprue comprises a feeding end and a discharging end, and each feeding end is higher than the corresponding discharging end; the included angle of each wedged sprue is 45-160 degrees, the width of each wedged sprue is 0.03-0.2 mm, and the height of the discharging end of each wedged sprue is 0.07-0.3 mm. The runner system for production of the ultrathin light guide plate has the advantages of being capable of reducing pressure losses of melted plastic, improving the liquidity of the melted plastic, improving the production quality of the ultrathin light guide plate and the like.

Description

technical field [0001] The invention belongs to the field of flow channel systems, and in particular relates to a flow channel system for ultra-thin light guide plate production. Background technique [0002] The runner system includes sprue, runner and gate. Ordinary runner system is also called runner system or gating system, which is the passage of molten plastic from the nozzle of the injection molding machine to the mold cavity. [0003] Ultra-thin light guide plate, "ultra-thin" usually refers to the thickness of which is difficult to achieve injection molding with existing injection molding machines. For example, a 5-inch light guide plate, usually with a thickness of less than 0.3mm, is called an ultra-thin light guide plate. [0004] Ultra-thin light guide plate injection molding, in addition to the necessary high-speed injection molding machine, must also have a suitable mold guarantee. In the mold, the runner system is one of the key technologies. The existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/27
CPCB29C45/27B29C45/2708
Inventor 何文瀚
Owner LITEGO OPTICAL TECH CO LTD DONGGUAN BRANCH
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