The plastic injection moulding plastic process: CAPITOL EUROPE relies on a 40 years US experience with the following process of Production.

Our One-Piece flip top containers are all injected and closed into the mould according to specific patents on the custom molded plastic construction. The particularity lies in the mold itself. After injection the vials are ejected closed while still very hot - preventing any bacteria to be polluting the vial. All of our vials are produced in class 10.000 clean room conditions and are aseptic.

Thus far, closing into the mold at 200°C offers a perfect seal: the polyprop is cooling down with a perfect pressure between the lips, and the plastic vial is guaranteed perfectly tight.

CUSTOM MOLDED PLASTIC: TECHNICAL DETAILS ON MOULD CONCEPT

1. All moulds are made from 420SS, hardened to 50 Rockwell :

  • Needs to be consistent throughout to maintain temperature,
  • Needs to be very durable to withstand impact,
  • Indefinite life. Components that wear (cavities, cores) are modular in design and can be replaced without replacing the entire mould,
  • Each cavity of every mould is engraved with cavity letter and mould number for traceability.
2. Plastic Injection Moulding Process :
  • Molten plastic is injected into a cavity (female) through a gate,
  • Molten plastic flows around the cores (male) and forms into shape,
  • Plastic flows around tall core to form body and through the hinge to form lid
  • Mould opens and cores retract,
  • Part stays in mould and does NOT come off on the core,
  • Flipper rotates upward and closes vial in the mould (this is the key aspect of Capitol Vial's patented technology),
  • Vial is ejected from the mould by being struck by a "poppit" and then blasted with compressed air.
3. Unique design of our custom molded plastic
  • Movable piece of the mold is called the Flipper,
  • Puller bead keeps vial in mold when cores retract ,
  • Closing the vials while the material is hot is what creates the perfect seal (use the natural curing properties of the material),
  • 3 layers of seal to prevent leakage.
4. Sterile by process
  • Vial is closed immediately upon the custom molded plastic and is manufactured in a Clean Room
Key points
  • Multi-cavity tools share the same plastic injection moulding process as single cavity tools
  • Elastomers and colors can be added to the base resin in order to achieve desired attributes