CN-116852638-B - Reflecting cover processing method, reflecting cover and Mini LED backlight module

CN116852638BCN 116852638 BCN116852638 BCN 116852638BCN-116852638-B

Abstract

The invention discloses a reflector processing method, a reflector and a Mini LED backlight module, wherein the reflector processing method comprises the following steps of adding a first injection molding material and a second injection molding material into two charging barrels of a double-color injection molding machine, wherein a mold is arranged in the double-color injection molding machine, a cavity of the mold is divided into a first cavity and a second cavity, the first cavity is communicated with the second cavity, and the colors of the first injection molding material and the second injection molding material are different; injecting the first injection molding material and the second injection molding material in two barrels into the first chamber and the second chamber at one time; and opening the double-color injection molding machine to enable the mold to be opened to obtain a finished reflecting cover product. According to the processing method provided by the invention, the two parts with different colors in the reflecting cover are processed through the double-color injection molding machine, so that the double-color integrated reflecting cover is formed, and the light homogenizing performance of the reflecting cover is improved.

Inventors

LI LINFENG
WANG YANGGANG
XU PENGJU

Assignees

武汉海微科技有限公司

Dates

Publication Date: 20260508
Application Date: 20230615

Claims (7)

1. The utility model provides a reflector processing method, the reflector includes cup and light guide piece, be equipped with the reflection of light face on the lateral wall of the inner chamber of cup, the bottom of cup is provided with the through-hole of its inner chamber of intercommunication, the reflection of light face is used for carrying out even light to light, the light guide piece is located in the through-hole, the light guide piece sets up to the hemisphere, and towards the rim of a cup direction protrusion setting of cup, the light guide piece is dorsad the rim of a cup direction's of cup side is provided with the mounting groove, the mounting groove is used for installing the lamp pearl, its characterized in that, the reflector processing method includes following steps: adding a first injection molding material and a second injection molding material into two charging barrels of a double-color injection molding machine, wherein a mold is arranged in the double-color injection molding machine, a cavity of the mold is divided into a first cavity and a second cavity, the first cavity is communicated with the second cavity, and the first injection molding material and the second injection molding material are different in color; Injecting the first injection molding material and the second injection molding material in two barrels into the first chamber and the second chamber at one time; opening the double-color injection molding machine to enable the mold to be opened to obtain a finished reflecting cover product; The light emitted by the lamp beads can be emitted into the light guide piece, the light guide piece is used for homogenizing the light, and then the light passes through the light guide piece to irradiate on the reflecting surface.
2. The method of claim 1, wherein the step of adding the first molding compound and the second molding compound to two barrels of a two-shot molding machine comprises: Baking and dehumidifying the first injection molding material and the second injection molding material to obtain a dried first injection molding material and a dried second injection molding material; blending the dried first injection molding material with diffusion powder according to a preset proportion; And respectively adding the dried first injection molding material and the dried second injection molding material which are blended with the diffusion powder into two charging barrels of the double-color injection molding machine.
3. The method of claim 2, wherein the ratio of the diffusion powder to the first molding compound is in the range of 0.5% -3%.
4. The method of claim 1, wherein in the step of sequentially injecting the first injection molding material and the second injection molding material in the two barrels into the first chamber and the second chamber, the first injection molding material correspondingly forms the cup body, and the second injection molding material correspondingly forms the light guide; The step of sequentially injecting the first injection molding material and the second injection molding material in the two barrels into the first chamber and the second chamber comprises: Heating the mold, the hot runner of the double-color injection molding machine and the material pipe of the double-color injection molding machine to enable the mold, the hot runner of the double-color injection molding machine and the material pipe of the double-color injection molding machine to reach respective preset temperatures; heating the first injection molding material and the second injection molding material to a molten state; injecting the first injection molding compound in a molten state into the first cavity; Injecting the second injection molding material in a molten state into the second cavity.
5. The method of claim 4, wherein the step of heating the mold, the hot runner of the two-shot molding machine, and the material pipe of the two-shot molding machine so that the mold, the hot runner of the two-shot molding machine, and the material pipe of the two-shot molding machine each reach their respective preset temperatures, The preset temperature range of the die is 100-120 ℃; The preset temperature range of the hot runner of the double-color injection molding machine is 300-315 ℃; the preset temperature range of the material pipe of the double-color injection molding machine is 240-315 ℃.
6. The method of claim 1, wherein the step of opening the two-shot molding machine to open the mold to obtain the finished reflector product further comprises: and cooling the die until the preset cooling time is met.
7. The method of claim 6, wherein the predetermined cooling time is in the range of 15 seconds to 30 seconds.

Description

Reflecting cover processing method, reflecting cover and Mini LED backlight module Technical Field The invention relates to the field of Mini LED structures, in particular to a reflector processing method, a reflector and a Mini LED backlight module. Background The Mini LED backlight product has the advantages of high color saturation, high color gamut, local dimming and long service life, and is widely applied to consumer electronics/vehicle-mounted electronics/industrial control products. However, when the HDR effect is turned on, the LED at the position corresponding to the picture to be displayed is turned on, and the LED corresponding to the picture to be displayed is not turned off. Disclosure of Invention The invention mainly aims to provide a reflector processing method, a reflector and a Mini LED backlight module, and aims to solve the problem that halation exists in the use of the existing Mini LED backlight product. In order to achieve the above object, the present invention provides a method for processing a reflective cover, the reflective cover includes a cup body and a light guide member, a reflective surface is provided on a sidewall of an inner cavity of the cup body, a through hole communicating with the inner cavity of the cup body is provided at a bottom of the cup body, the reflective surface is used for homogenizing light, the light guide member is provided in the through hole, the light guide member is provided in a hemispherical shape and protrudes toward a cup mouth direction of the cup body, a mounting groove is provided on a side surface of the light guide member facing away from the cup mouth direction of the cup body, and the mounting groove is used for mounting a lamp bead, wherein the method for processing the reflective cover includes the following steps: adding a first injection molding material and a second injection molding material into two charging barrels of a double-color injection molding machine, wherein a mold is arranged in the double-color injection molding machine, a cavity of the mold is divided into a first cavity and a second cavity, the first cavity is communicated with the second cavity, and the colors of the first injection molding material and the second injection molding material are different; Injecting the first injection molding material and the second injection molding material in two barrels into the first chamber and the second chamber at one time; and opening the double-color injection molding machine to enable the mold to be opened to obtain a finished product of the reflecting cover. Optionally, the step of adding the first injection molding material and the second injection molding material to the two-shot molding machine comprises: Baking and dehumidifying the first injection molding material and the second injection molding material to obtain a dried first injection molding material and a dried second injection molding material; blending the dried first injection molding material with diffusion powder according to a preset proportion; And respectively adding the dried first injection molding material and the dried second injection molding material which are blended with the diffusion powder into two charging barrels of the double-color injection molding machine. Optionally, the ratio of the diffusion powder to the first injection molding material ranges from 0.5% to 3%. Optionally, the first injection molding material and the second injection molding material in the two charging barrels are sequentially injected into the first cavity and the second cavity, the first injection molding material correspondingly forms the cup body, and the second injection molding material correspondingly forms the light guide piece; The step of sequentially injecting the first injection molding material and the second injection molding material in the two barrels into the first chamber and the second chamber comprises: Heating the mold, the hot runner of the double-color injection molding machine and the material pipe of the double-color injection molding machine to enable the mold, the hot runner of the double-color injection molding machine and the material pipe of the double-color injection molding machine to reach respective preset temperatures; heating the first injection molding material and the second injection molding material to a molten state; injecting the first injection molding compound in a molten state into the first cavity; Injecting the second injection molding material in a molten state into the second cavity. Optionally, in the step of heating the mold, the hot runner of the two-shot molding machine, and the material pipe of the two-shot molding machine so that the mold, the hot runner of the two-shot molding machine, and the material pipe of the two-shot molding machine each reach their respective preset temperatures, The preset temperature range of the die is 100-120 ℃; The preset temperature range of the hot runner of the double-color inject