What are the technical conditions of polypropylene bottle extrusion blow molding?
(1) raw material when plasticizing melting process temperature should be controlled in the range of 170 ~ 230 ℃.
(2) the blow-up ratio of the billet pipe blow molding bottle products is controlled within (1.5~3) : 1 range.
(3) the compressed-air pressure of blown billet tube forming bottle products is 0.3-0.6mpa.(4) molding bottles with the mold temperature is 20 ~ 50 ℃, cooling stereotypes about products molding production cycle time by 50% ~ 60% of total time.
(5) the quality requirements of bottle products are as follows: the product surface is smooth and clean, and no color difference, color change and uneven color and color are detected in sunlight;The bottle is filled with water, and then the lid is tightened. It fell from a height of 1.2m for 3 times without damage and without cracking the bottom.