The invention discloses a method for improving the surface quality of injection foamed plastic parts, which effectively eliminates surface defects. The steps are as follows: S100, preheating the mold cavity; S200, pressurizing the mold cavity to 3‑4 MPa; S300, injecting raw materials into the cavity through a vacuum screw extruder until the air pressure or injection volume reaches a preset value; S400, vacuumizing the cavity to form negative pressure for material foaming and full cavity filling; S500, re-pressurizing the cavity to 3‑4 MPa and maintaining the pressure for more than 40 seconds; S600, cooling the mold, releasing pressure and demolding. By optimizing mold temperature and air pressure parameters, the method inhibits surface bubble generation and significantly improves the surface finish of foamed injection products.

Area Code: CN

Application Number: CN202010833451.9