Floating glass fibers

Glass fiber reinforced products show exposed and whitened glass fibers on the surface. When this defect occurs in products of Process No. 1, it is usually related to a specific process parameter range or equipment status. If it persists, it will directly affect the product qualification rate and production cycle, increasing material loss and rework costs. Timely diagnosis and elimination is a basic requirement to ensure stable production.

1. Process parameter factor: Low melt temperature, low mold temperature, and slow injection speed cause the glass fibers to be insufficiently encapsulated and the glass fiber length to be too long.

1. Process parameter optimization and adjustment: Increase the melt and mold temperatures, speed up the injection speed, select chopped glass fiber or optimize the glass fiber surface treatment. 2. Systematic troubleshooting method: Troubleshoot item by item in the order of "parameters -> materials -> mold -> equipment". First adjust the parameters that are easiest to change, such as injection pressure and temperature, and observe the effect; if there is no improvement, check the drying and flowability of the raw material; further check the mold venting and gate design; finally check the mechanical state of the equipment (non-return ring, screw). Change only one variable at a time to determine the root cause. 3. Preventive management: Establish standardized process parameter cards and quality control limits for each mold/product, and regularly conduct process capability index (CPK) assessments. For recurring problems, use fishbone diagrams or 5Why analysis to trace the root cause, and solidify countermeasures as PFMEA control points.

This problem is a typical manifestation of floating glass fibers in '2079851475616104452, and the core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, pressure, speed) and rationality checks of mold design. It is recommended to start with process parameter adjustment and gradually go deeper to the equipment and mold levels.