Plastic mold manufacturers, the issue of dark color and poor gloss in the production process of injection molds
Date: 2024-06-01
In the production process of injection mold manufacturing, dark color and poor gloss issues are often encountered. This situation may bring a series of problems to the production process, so solving this issue is crucial. The reasons for dark color and poor gloss are varied, but mainly caused by insufficient smoothness of the mold surface, poor quality of plastics or colorants used, excessive recycled materials, and defects in the injection mold’s gating system.
1. Poor smoothness of injection molds can lead to rust on the cavity surface, and poor mold venting can also affect the product’s color and gloss.，Plastic mold manufacturers
To solve this issue, it is necessary to strengthen mold cleaning and maintenance, ensure that the mold surface smoothness meets requirements, and improve the mold venting system to ensure smooth gas exhaust, avoiding defects on the product surface.
2. The use of poor-quality plastics, colorants, or recycled materials can also result in dark color and poor gloss of products.
Therefore, high-quality raw materials should be chosen during the production process, ensuring they are dry and free of impurities. Additionally, the design of the injection mold’s gating system needs to be rationalized by increasing the cold slug well, runners, polishing the main runner, sprue, etc., to ensure plastic fills the mold evenly, preventing color differences and poor gloss.
3. Controlling material and mold temperatures, clamping force, processing pressure, speed, injection time, back pressure, and other parameters during the injection mold production process is crucial in addressing dark color and poor gloss issues.
It is necessary to ensure proper plasticization while avoiding excessively low material and mold temperatures, as well as low processing pressure and speed, which can affect product density and surface quality.
To address dark color and poor gloss issues in the production process of injection molds, various aspects need to be considered, including improving mold smoothness, optimizing material selection, enhancing gating system design, and controlling production parameters. Only through comprehensive consideration of these factors can this issue be effectively avoided, enhancing the production efficiency and product quality of the enterprise.
