Product Warpage and Deformation

After demolding, the product bends, twists, or deforms irregularly. Deformation usually gradually intensifies after the product is demolded, and is more significant especially in asymmetric structures or parts with large wall thickness differences. This problem causes product dimensions to exceed the tolerance range, affecting assembly accuracy and product function.

(1) In terms of shrinkage control: uneven curing shrinkage, uneven volume shrinkage leads to internal stress and dimensional deviation. (2) In terms of process speed: excessive product wall thickness differences cause inconsistent cooling rates, speed parameters affect the synchronization of material flow state and reaction progress. (3) In terms of stress distribution: insufficient stress release, internal stress concentration causes the product to crack or deform during subsequent use.

(1) Design optimization: optimize the product wall thickness design to make it transition evenly, combine process simulation analysis or trial mold verification to continuously iterate and improve the design plan. (2) Post-treatment: use annealing/post-curing to eliminate internal stress, formulate a reasonable post-treatment temperature curve to eliminate internal stress and stabilize product dimensions. (3) Process control: uniform control of mold temperature, establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (4) Process optimization: extend the in-mold cooling time., determine a reasonable time based on product wall thickness and material characteristics, balancing production efficiency and quality. (5) Preventive measures: conduct shrinkage and warpage simulation analysis during the product design stage, and optimize the structure and process plan in advance.

The deformation problem stems from internal stress caused by uneven shrinkage or heating in various parts of the product, and needs to be systematically solved from three aspects: structural design, process parameters, and post-treatment.