What are the characteristics of extrusion blow molding molds?

What are the characteristics of extrusion blow molding molds?

①Blow molding molds usually only have female molds. 
②The blow-up pressure of the parison on the cavity of the blow molding mold is relatively small, generally ranging from 0.2 to 1.0 MPa. 
③Blow molding cavity molds are generally not hardened unless long-term production is required. 
④In the blow molding cavity, the parison is formed through expansion, which can reduce flow marks, weld lines on the product and the wear of the cavity. 
⑤ Since there is no male mold, deep recesses on blow-molded products can also be demolded (especially for plastics with lower hardness), and sliding inserts are generally not required. 
⑥It can effectively cut off the blank and ensure the strength of the joint line of the product. 
⑦It can cool the products quickly and evenly, and reduce the temperature gradient within the mold wall to shorten the molding time and minimize the warpage of the products.
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