Blow Molding is made of Parison by extrusion or injection molding, this is inserted into the cavity, and the air is blown into the cavity, cooling solidification made of special shape hollow products.
One: Supply raw material resin to the extruder. The resin supplied to the extruder is melted by the friction heat of the screw and the ambient temperature and is fed into the Die/Head of the extruder.
Two: The Die/Head exit of the extruder is cylindrical, and the cylindrical extrusions are extruded from the exit. The cylindrical extruded part is formed into a blank.
Three: The outside of the Die/Head is generally divided by 2 molds. There are cavities on the left and right molds that are shaped like the formed product, called Cavity.
Four: After the billet is extruded to a suitable length at the Die outlet, the billet is placed in two separate cavities.
Five: Blow compressed air into the billet into the cavity, so that the billet blows into the same shape as the cavity.
Six: After blowing into the shape of the cavity, it is cooled in this state.
Seven: Cool the billet blown in the cavity to close to room temperature to solidify it, open the cavity and take out the product.
Eight: Remove unnecessary parts stuck on the product to complete the product molding.
