Nylon is a kind of crystalline plastic, and both nylon molecular chains and glass fibers will be oriented during the molding process, resulting in warping deformation.

When designing the mold, it is necessary to confirm the direction of deformation through CAE and molding experience, design the size and position of the gate and even the shape of the mold for pre-deformation.

Now that the mold has been completed, we can only analyze the direction and degree of its deformation, and first try to change the molding conditions (reducing the firing rate, increasing or decreasing the mold temperature and cooling time, increasing the temperature difference of the large mold, etc.). ), and then we can correct the size and position of the gate again. If it really doesn't work, you can only make a fixture to forcibly correct it and anneal it in a high-temperature oven.