Hollow injection molding part and injection mold and injection molding method thereof

• Main Authors: LIN RONG, XU CONGYAN, ZENG HUANBIN, LIN PEIJI
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The hollow injection molding part comprises an upper mold assembly and a lower mold assembly, a forming mold cavity is formed between the upper mold assembly and the lower mold assembly, a glue inlet channel is formed in the upper mold assembly, and the outlet end of the glue inlet channel communicates with the forming mold cavity; a valve needle used for opening and closing the outlet end of the glue inlet channel is arranged in the glue inlet channel, an air inlet channel is formed in the valve needle, and the two ends of the air inlet channel communicate with an external air channel and the forming die cavity correspondingly. According to the invention, the glue inlet channel and the valve needle with the air inlet channel are respectively used for air inflation, and the production can be completed only by using the same set of mold and the same material in the forming process through a one-step forming process, so that the production process is simple, and the production efficiency is higher; meanwhile, t