Seiki – Valve Gate System

Valve Gate System, Seiki,

About the Valve Gate System

Mechanical Valve Gate System incorporates a valve pin activated by pneumatic drive. We have full-line of valve gate including options, with the length up to 400mm, gate size of 0.8 – 8.0mm. Various kinds of valve gate in accuracy and function are available. Depends on application, valve gate with tip heater is available, too.

Principle and Features of Valve Gate System

With its topless structure, the gate is machined directly into the cavity, which is advantageous to cooling effectiveness and transcription of pin diameter. In case of valve equipped with separate tip heater located at its front-end, the tip heater can heat synchronously with the molding cycle to employ intermittent heating. This unique function facilitates the molding of the crystalline resins.

Overall structure of Valve Gate System

The system consists of valve gates, manifold (assembled inside the mold), temperature controller, air controller and air source in the factory to activate the valve pins.

Valve Gate System lineup

    • SVP (F), Valve Gate System, Seiki,
      Series SVP(F)
      Suitable for a wide range of molding process using commodity resin to super engineering plastic.
      Addition of the Tip heater system (optional) makes this valve to be very effective for molding reinforced resins and crystallized resins (PET pre-form).
      Detailed pdf Information
    • SV32F, Valve Gate System, Seiki
      Series SV32F
      Available to minimum 32 mm gate pitch.
      A unique guiding mechanism is equipped to guide valve pin.
      Best suited to mold commodity resin and commodity engineering plastic (POM, PC, ABS, PA, etc.)
      Detailed pdf Information
    • SV25F, Valve Gate System, Seiki,
      Series SV25F
      Suitable for a wide range of molding process using commodity resin to commodity engineering plastic.
      It accommodates multi cavity with small pitch molding 25mm – the smallest pitch among SV series.
      It works for reinforced resins, too.
      The combination of its air drive system and guiding mechanism prevents the gate and the pin from wear and tear or damage.
      Air drive system provides easy handling and maintenance.
      Detailed pdf Information
    • SVPL, Valve Gate System, Seiki,
      Series SVPL
      This modified SVP type is exclusively for direct center gating application (single cavity molding). With using a manifold, it works for multi molding as well.
      Detailed (UPDATING)
    • Series SVY, Valve Gate System, Seiki,
      Series SVY / Simple-flow
      No splitting flow occurs inside the valve because the pin does not hinder the melt flow.
      Minimized pin deformation keeps the pin accurately in line with the gate.
      Detailed pdf Information

  • CVN, Valve Gate System, Seiki,
    Series CVN
    Features high cost performance.
    Specifically for molding commodity resin.
    Features simple structure.
    Detailed (UPDATING)
  • SMV, Valve Gate System, Seiki,
    Series SMV
    This new compact valve gate system realizes thin stationary side height of 120mm, being applicable to 15t―50t of machine’s clamping force capacity.
    Applicable to super engineering plastic molding.
    It is equipped with a tip heater as its standard function, which facilitates the optimum molding condition for molding such as filler-contained plastics.
    The combination of its air drive system and guiding mechanism prevents the gate and the pin from wear and tear or damage.
    Air drive system provides easy handling and maintenance.
    Detailed pdf Information
  • SVPR, Valve Gate System, Seiki,
    Series SVPR
    Slim size of 9mm in front-portion diameter.
    Gate size available from 0.8 to 1.2mm.
    Detailed (UPDATING)
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