Back to Home Page
Blow molding is comparable to blowing up
a balloon inside a plastic jug.
Plastic
(Resin) - Various plastics can be used in the Blow
Molding Process.
Blending
- Colorant and UV Stabilizer are carefully blended with high
resin pellets to assure best distribution throughout the part. Careful blending
means the finished product will have
consistent strength throughout. Hot blending of resin is automatic in blow
molding.
Melting
- In the blow molding machine, plastic is slowly
melted to assure no strength and resilience are lost.
Molding
(Parison)
The first step is creating a heated tubular "balloon", called a
parison, of molten plastic which can be blown up inside the mold (thus the term
"blow molding"). The thickness and weight of each part is carefully
controlled at this step to assure that exact specifications are achieved.
Step
Five-Molding
The mold is formed in two halves that close on the
"balloon" parison. The "balloon" is then inflated by air
pressure to form the walls of the part. This inflating causes the walls to super
compress against the mold and become ultra tough.
Step Six-Finishing
The part is removed from the mold after appropriate cooling
and is trimmed and cut in preparation for any final assembly or decoration.
*Photos and information from www.diakonmolding.com
