Home > News > Daily News > Blow molding process

News

Blow molding process

  • Author:naky
  • Source:www.diecastingpartsupplier.com
  • Release on:2015-03-27
Blow molding process

Different blow molding process , due to raw materials, processing requirements, and differences in production
costs , have different advantages in the processing of different products. Detailed blow molding process can
reference。

From a macro perspective on here blow characteristics. Hollow blow molding products include three main methods :
extrusion blow molding : mainly used unsupported parison processing ; injection blow : mainly used by supported
metal core preform processing ; stretch blow molding include: extruding a draw- blow molding, injection blow
molding and stretch a two methods , processability biaxially oriented products , greatly reduce production costs
and improve product performance.

In addition, multi-layer blow molding, blow molding pressing , dipping blow molding, foam molding, blow molding
and other three-dimensional . However, 75% of the blow-molded article by an extrusion blow molding , injection
blow molding with 24% , 1% with other blow molding ; all blow molding products , 75 % are biaxially stretched
product . Advantages of extrusion blow molding is a high efficiency, low cost of equipment , tooling and
machinery wide range of options , the disadvantage is a higher rejection rate , recycling waste , the use of
poor thickness control products , raw material dispersion is limited , molding after trimming operations must be
carried out.

Advantages of injection blow molding process is that there is no waste generated , can control the thickness and
material dispersion products , the narrow neck molding products of high precision , surface finish, can be
economically small batch production. The disadvantage is the high cost of molding equipment , and to some
extent, is only suitable for small blow moldings .

Blow molding process conditions , require blown parison mold compressed air must be clean . Injection blow air
pressure is 0.55 ~ 1MPa; extrusion blow pressure of 0.2l ~ 0.62MPa, and stretch blow pressures often require up
to 4MPa. In the plastic solidification , low pressure so that the internal stress generated in the low article ,
stress dispersion more uniform , and low tensile stress may improve the article , impact , bending and other
properties.

Following is our company detail:Our factory has specilized in die cast aluminum enclosure buy .aluminium
enclosure,die cast aluminum cookwaredie cast aluminum for many year since 2002. And our products are always
well received and approved by our customers from Asian, European, North American and Australian etc.