Summary of the analysis of defects in the LED lens production process

With the progress of society, the demand for lighting is increasing, and the demand for LED optical lenses is also increasing. With the increase in production, the quality of production is also at hand. In order to ensure the quality of products, strict quality control of the products should be carried out, and some defects in the production should be analyzed and summarized, so as to reduce or avoid the appearance of defective products and improve production efficiency. So what are the defects in the ED lens production process? The following is a summary of your analysis.

Point defect

The lens of the LED injection module has a point shape defect, and the quality inspector should take the largest diameter as the criterion when measuring the size. Such as heterochromatic spots, bubbles, pits, oil stains and other undesirable phenomena.

Flash defect

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

Hard scratch defect

The lens of the LED injection module has deep scratches on the surface of the product due to the friction of the hard object. Most are caused by machinery.

Fine scratch defect

There are no deep scratches. Generally, it is generated during the sorting and packaging process that is not performed according to standard operations, and the traces are relatively small and difficult to be found.

Fingerprint defect

Fingerprints on the lens surface of the LED injection module or the bright surface of the part. Most of it is caused by the staff not wearing gloves.

Deformation defect

The lens of the LED injection module is deformed due to internal stress.

Top white top convex defect

Due to the large tightening force of the lens of the LED injection molding module, the ejector area is subject to white marks or bumps caused by the strong ejection force.

Underfill defect

Due to insufficient lens injection pressure of the LED injection module or poor exhaust in the mold cavity, the molten material cannot reach a certain corner of the mold cavity, resulting in insufficient injection.

Shrinkage defect

When the melt material passes through a thinner section, its pressure loss is great, and it is difficult to maintain a high pressure to fill the pits formed by the thicker section.

Pit defect

Due to damage to the lens of the LED injection module and other reasons, unevenness appears on the product plane.

Facial wear defects

The lens surface wears due to the need for fine processing after the mold is formed.

Foreign body defect

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 analysis summarizes the possible problems in LED production, and we will continue to collect and sort out the possible defects in the later stage, and improve the production efficiency for everyone.