Bellows material Xiamen, Xiamen, Fujian Province where good choice for first-generation technology Changsheng Plastic Factory is air-cooled cooling set shaping technology. Performance: Bellows outer and inner layers, respectively, with two separate feed extruders, inner and outer layers can be achieved using different colors and different materials production. Molding machine is divided into upper and lower machine, cooling water-cooled and air-cooled combined, but the exact meaning is still the traditional air-cooled, flaring with online functionality, the second generation technology is an open Pour cooled shaping technology. Module cooling cycle: Intermittent water-cooled performance: forming machine adopts horizontal structure, shuttle transmission, intermittent water, vacuum forming, support online double flaring. Third generation technology is a sealed pressure water shaping technology. Module cooling cycle: continuous uninterrupted cooling performance: Sealed continuous pressure circulation water cooling, cooling efficiency, higher yields, and second-generation models with intermittent air cooled models, production ramp-up to 3 times high. The third generation of the current production models of the manufacturers in the country only Weifang Zhongyun Science and Research Limited.