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 plastic bucket wholesale  fusion process to produce test-tube-shaped bottomed parison. (3) The preform is heated preform heating installation equipped with multiple, heating oven, heating sleeve, heating channel, etc. can be electrically heated or infrared heating. But the heating installation to be able to balance the thermostat and heating, the temperature difference between inside and outside the parison to minimize. (4) Tensile stretching mandrel are mounted and two kinds of stretching jig. ① stretch stretching mandrel mandrel inserted from the upper portion of the parison in the hydraulic action against the type of bottom blanks, stop longitudinally stretched, then the pores on the mandrel into the compressed air blown through, stop radial stretch. [1] [2] [3] Next
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