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Injection molding process of precise optical focus lens

An injection molding process and precision optics technology, used in optical components, other household appliances, household appliances, etc., can solve the problems of short molding cycle, injection molding process can not meet product requirements, unstable quality, etc., to ensure product yield and accuracy, reduce the surface peeling phenomenon, and ensure the effect of imaging clarity

Pending Publication Date: 2021-06-01
无锡鑫巨宏智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing optical lenses and lens products are relatively small, and the molding cycle is relatively short, about 20-30s. The shorter the residence time of plastic materials in the screw, the more stable the appearance and size of the product, and the higher the yield rate. ; For ultra-large lidar optical focusing mirrors with an outer diameter greater than 35mm and a thickness greater than 5mm, due to the large and thick lens of the product, the requirements for appearance, size, PV, BFL, and focal length are very high, and the existing injection molding process cannot meet the product Requirements lead to unstable quality and high defects in the production process, increased loss of raw materials, and increased production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An injection molding process of a precision optical focusing lens, comprising the following steps:

[0024] (1) Raw material pretreatment: Dry the PC raw material through a dehumidifying dryer, the drying temperature is 120°C, and the drying time is 4H-6H; and the dried raw material is added to the dehumidifying and drying cylinder of the injection molding machine;

[0025] (2) Optical lens mold heating: Install the optical lens mold in the injection molding machine, use a high-temperature water temperature machine to preheat the mold, heat the mold temperature to 130°C, and keep the temperature at this temperature for 2H; the constant temperature can make the optical lens mold The temperature is more uniform;

[0026] (3) Injection: The raw material in the material tube is hot-melted and injected into the optical lens mold through the nozzle. The injection process is divided into five stages; the temperature of the first material tube is 320°C; the temperature of the s...

Embodiment 2

[0031] An injection molding process of a precision optical focusing lens, comprising the following steps:

[0032] (1) Raw material pretreatment: Dry the PC raw material through a dehumidifying dryer, the drying temperature is 120°C, and the drying time is 4H-6H; and the dried raw material is added to the dehumidifying and drying cylinder of the injection molding machine;

[0033] (2) Optical lens mold heating: Install the optical lens mold in the injection molding machine, use a high-temperature water temperature machine to preheat the mold, heat the mold temperature to 125°C, and keep the temperature at this temperature for 2H; the constant temperature can make the optical lens mold The temperature is more uniform;

[0034] (3) Injection: The raw materials in the material tube are hot-melted and injected into the optical lens mold through the nozzle. The injection process is divided into five stages; the temperature of the first material tube is 310°C; the temperature of the...

Embodiment 3

[0039] An injection molding process of a precision optical focusing lens, comprising the following steps:

[0040](1) Raw material pretreatment: Dry the PC raw material through a dehumidifying dryer, the drying temperature is 120°C, and the drying time is 4H-6H; and the dried raw material is added to the dehumidifying and drying cylinder of the injection molding machine;

[0041] (2) Optical lens mold heating: Install the optical lens mold in the injection molding machine, use a high-temperature water temperature machine to preheat the mold, heat the mold temperature to 120°C, and keep the temperature at this temperature for 2H; the constant temperature can make the optical lens mold The temperature is more uniform;

[0042] (3) Injection: The raw materials in the material tube are hot-melted and injected into the optical lens mold through the nozzle. The injection process is divided into five stages; the temperature of the first material tube is 306 °C; the temperature of the...

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Abstract

The invention discloses an injection molding process of a precise optical focus lens, which is mainly used for injection molding of a super-large laser radar optical focus lens with the outer diameter of more than 35mm and the thickness of more than 5mm, and is characterized in that in the first stage of the pressure maintaining process, the pressure maintaining pressure is relatively small, the time is short, and plastic cement is slightly cured, the pressure maintaining time from the second stage to the fifth stage is prolonged, the pressure is increased, and the product appearance, size and functional precision are ensured; according to the cooling time, the time for delaying glue melting is set, and the situation that glue is melted after pressure maintaining according to common operation, the plastic cement stays in a gun barrel for a long time and is decomposed and carbonized, and consequently many products are poor in appearance and unstable in size and optical function is avoided; and the product yield obtained through the injection molding process reaches 98% or above, the tolerance precision is small, the surface roughness reaches the nanometer level, and the injection molding process is suitable for production of super-large and thick optical focus lenses.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to an injection molding process of a precision optical focusing mirror. Background technique [0002] Most of the existing optical lenses and lens products are relatively small, and the molding cycle is relatively short, about 20-30s. The shorter the residence time of plastic materials in the screw, the more stable the appearance and size of the product, and the higher the yield rate. ; For ultra-large lidar optical focusing mirrors with an outer diameter greater than 35mm and a thickness greater than 5mm, due to the large and thick lens of the product, the requirements for appearance, size, PV, BFL, and focal length are very high, and the existing injection molding process cannot meet the product Requirements lead to unstable quality and high defects in the production process, increased loss of raw materials, and increased production costs. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/77B29C45/78B29C45/73B29L11/00
CPCB29C45/77B29C45/78B29C45/73B29C2945/76498B29C2945/76531B29C2945/76595B29L2011/00
Inventor 钱会明沈雁兵
Owner 无锡鑫巨宏智能科技有限公司
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