With the increase in demand for LED injection molding modules, the mass production of lenses is also increasing exponentially. Along with the increase in output, there are also some problems. In order to ensure product quality, it is necessary to carry out strict quality inspection of the products. What are the defects in production?

Point defect: The lens of the LED injection molding module has a point-shaped defect, and the quality inspector should take the largest diameter as the criterion when measuring the size. Such as abnormal color spots, bubbles, pits, oil stains and other undesirable phenomena.

Burr: Due to the parameters of the precision molded preform or the mold, it will cause waste at the edge or parting surface of the product. Most of the burrs are caused by uneven grinding after embossing.

Hard scratches: The lens of the LED injection module has deep scratches on the surface of the product due to the friction of hard objects. Most are mechanical.

Fine Scratches : Scratches with no depth. Generally, it is not produced according to the standard operation during the sorting and packaging process, and the traces are small and difficult to be found.

Fingerprints: Fingerprints appearing on the lens surface of the LED injection module or on the bright side of the parts. Most are caused by staff not wearing gloves.

Deformation: The plane deformation of the lens of the LED injection module due to internal stress.

Top white/top convex: Due to the large wrapping force of the LED injection module lens, the ejector area is subjected to a strong ejection force, resulting in a white mark or bulge.

Insufficient filling: The phenomenon of insufficient injection caused by insufficient injection pressure of the lens of the LED injection molding module or poor exhaust in the mold cavity, so that the molten material cannot reach a certain corner of the mold cavity.

Shrinkage: When the melt material passes through a thinner section, its pressure loss is very large, and it is difficult to maintain a high pressure to fill the pits formed in the thicker section.

Pit: Due to the damage of the lens of the LED injection molding module, etc., the unevenness appears on the product plane.

Facial wear: The lens surface is worn due to the need for fine processing after the mold is produced and formed.

Foreign objects: Because the lens of the LED injection module contains impurities or other foreign objects in the molding process, the product is opaque, including foreign objects that cannot be wiped off the surface of the lens.

The above is the introduction of the lens defects of the LED injection molding module. If you need more detailed information on the LED injection molding module and its lens, please consult Shenzhen SUNLITE Optoelectronics Co., Ltd. Shenzhen SUNLITE Optoelectronics Co., Ltd. is a company dedicated to LED light boxes. Lighting, sign lighting and decorative lighting products research and development, production, sales and service of high-tech enterprises. Our website is http://en.sunlite-led.com, welcome to consult.