Black specs in molded parts

The presence of black specs in transparent injection molded parts is a common quality issue that can occur due to various reasons. These black specs are usually caused by the presence of foreign particles or contaminants in the material or mold, which get trapped in the final part during the injection molding process. Here are some of the common causes of black specs in transparent injection molded parts:

1. Resin contamination: If the raw material used in the injection molding process is contaminated with impurities, such as dust, dirt, or other debris, it can cause black specs in the final part.
2. Mold contamination: If the mold is contaminated with foreign particles or debris, it can cause black specs in the final part. This can occur if the mold is not cleaned properly between runs or if there is a buildup of material or residue in the mold.
3. Equipment contamination: If the injection molding machine or any other equipment used in the process is contaminated, it can cause black specs in the final part.
4. Poor material handling: If the material is not handled properly during the storage, handling, or transportation, it can lead to contamination and the formation of black specs in the final part.
5. Inadequate purging: If the previous material is not purged completely from the machine before running a new material, it can lead to contamination and black specs in the final part.

To prevent the occurrence of black specs in transparent injection molded parts, it is important to identify and address the root cause of the issue. This may involve improving the material handling and storage practices, cleaning the mold thoroughly between runs, ensuring proper purging of the machine, and using high-quality raw materials with minimal impurities. Regular maintenance and cleaning of the equipment and the production environment can also help prevent the formation of black specs in transparent injection molded parts.

UNICLEANPLUS purging grades provide significant advantages by

• Eliminate carbon accumulation and color streaking occurrence.
• Decontaminate the die quickly.
• Thoroughly clean the screw and barrel.
• Can be effortlessly removed by backing up your processing resins after the purge.
• Significantly lower rates of scrap and defects.
• Reduce time needed for material and color changes.
• Keep your machine sealed and prevent oxidation during longer shut downs.
• Promote quicker and effortless screw pushes.
• Facilitate simpler starts after shut downs.
• Formulated to enable no or little residue after purging.

CONCLUSION: -?Various studies and analysis, It has been proved that UNICLEANPLUS purging solutions shows a very good value preposition in purging, thereby resulting in the best molded product. UNICLEANPLUS purging compounds of has shown significant reduction in percentage of loss, gives better predictability in production output and product quality.

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