Yes, quality inspection and adjustment are required after the injection molding machine is replaced to ensure that the new material can be injected normally and meet product quality standards. The following are common quality inspection and adjustment steps after refueling:

Size and appearance inspection: Firstly, check the size and appearance of the new injection molded parts to ensure they are consistent with the parts produced from old materials. Pay special attention to possible shrinkage changes or other dimensional deviations.
Process parameter adjustment: Depending on the melting temperature, fluidity, and other process characteristics of the new material, it may be necessary to adjust process parameters such as injection rate, injection pressure, melting temperature, and mold temperature. This helps to ensure that the new material has good flowability during the injection molding process and can correctly fill the mold.
Mold adjustment: If different materials are used, it may be necessary to fine tune the mold to adapt to the characteristics of the new material. This may include adjusting the mold temperature, cooling time, and other process parameters related to the mold.
Sampling and testing: Conduct a series of sampling and testing to evaluate the quality of parts produced with new materials. This may involve using quality inspection equipment for physical performance testing, dimensional measurement, and other related tests to ensure that the parts meet specification requirements.
Production process monitoring: Before starting formal production, closely monitor various process parameters during the injection molding process to ensure stable production and consistent quality of new materials.
Record and Compare: Record and compare data and quality indicators for the production of new and old materials, in order to promptly identify differences and take necessary measures for adjustment and improvement.

By performing these quality checks and adjustment steps, it can be ensured that the injection molding machine can smoothly produce products that meet quality standards after material replacement. This helps to ensure the stability of the production process and improve product consistency and quality.