A milk bottle blow molding machine is used to produce milk bottles out of plastic through blow molding. Here are some key details:
- It is used to make milk bottles from plastics like HDPE and polypropylene which are FDA approved for food contact.
- The machine extrudes a hot tubular plastic parison and clamps it into a hollow mold.
- High pressure air is blown into the parison, inflating it like a balloon against the walls of the mold cavity.
- The plastic takes the shape of the mold as it cools and hardens. Common shapes are round, square or rectangular.
- Molds are multi-cavity, allowing multiple bottles to be produced with each blow. 6-16 bottles per blow is common.
- Once cooled, the mold opens and the blow molded milk bottles are ejected out.- Milk bottles often have handled shapes with an integrated handle and spout/cap area. The mold provides the details.- Volume capacities range from small single serve bottles to half gallon and gallon sizes.
- Output depends on number of cavities, parison size and production speed. Over 2500 bottles/hr is possible.- Advanced machines have multi-stage preform heating, bottom blow system and automation options.- Blow molding allows flexible bottle design compared to injection molding.
- HDPE and PP provide good moisture barrier, impact strength and squeeze resistance.In summary, blow molding milk bottle machines offer efficient mass production of durable and lightweight plastic milk bottles in different shapes and volumes.
