Blow mold for degradable plastic film

• Main Author: WEI JIANQING
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; 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 utility model relates to a blow mould for degradable plastic films, which comprises an outer mould, an inner mould, an upper mould cover, a lower mould cover and a mould core, the upper mould cover and the lower mould cover are respectively arranged at the upper ends and the lower ends of the outer mould and the inner mould, a mould opening is arranged in the middle of the upper mould cover, and the mould core is fixed at the upper end of the inner mould through the mould opening. A feeding gap is reserved between the upper die cover and the inner die, a feeding port is formed in the middle of the upper die cover and communicated with the feeding gap, the inner die is a cone, a spiral groove is formed in the periphery of the inner die, the inner die is a cone and arranged in the outerdie, a feeding gap is reserved between the outer die and the inner die, and non-stick coatings are arranged on the surfaces, making contact with materials, of the inner die and the outer die. The conical mold core is used for