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Preparation of biological scaffolds with complex shapes and controllable internal structures is a significant development direction for the tissue engineering field. Due to its simplicity, low‐cost and cost‐effectiveness, fused deposition molding (FDM) is one of the most popular 3D printing technologies. In this paper, polyvinyl alcohol/polylactic acid/hydroxyapatite composites were fabricated successfully. On this basis, composite scaffolds with different pore structures were designed and constructed by using FDM technology. The material structure was characterized by scanning electron microscopy (SEM) and dynamic thermomechanical analyzer. The results showed that the cross‐sectional morphology of the system presented a “sea‐island” structure. The introduction of PLA and HA significantly increased the modulus of the material, which was beneficial to achieve its FDM processing. The compressibility, mineralization behavior, and biocompatibility of the viscoelastic characteristics to natural cartilage subjected to the condition of filling angle of 45° was systemically invesitgated. Notably, the concentrations of Ca2+ and PO43− in simulated body fluid were reduced by 34.7% and 58.2% on 8th day, indicating a good bone formation and mineralization ability, which was further corroborated by SEM and fourier‐transform infrared spectroscopy (FTIR) results. Biotoxicity test showed that the scaffold presented excellent biocompatibility.

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The effect of processing parameters related to temperature on the interface bonding strength of automotive overmolding injection parts was investigated using moldflow simulation. In this study, the average depth of the melting layer, the melting time of the melting layer and the temperature of the melting layer on the basal body in the interface zone are used as a qualitative index, and the interface bonding strength of the tensile test and the results observed by scanning electron microscopy are used as a basis for verification. The results show that processing parameters related to temperature have a great influence on the interface bonding strength of parts. With an increase in melt and mold temperature, interface bonding strength is also strengthened. The most influential factor is the melt temperature of the second material.