Hot runner type injection molding device

Abstract

Abstract PURPOSE:To prevent molten resin from deteriorating by controlling the temperature of each heating coil comparatively low, by bringing an outside wall of a coil assembly in contact with a mold by providing a heat insulation layer between a high-frequency induction heating coil and a tubular component. CONSTITUTION:An outside wall of a coil assembly (such as a case 86, filler 91 and coil 38) composed of the coil 38 winding round the circumference of a tip and a component holding the coil 38 is brought into contact with a mold 26 and a heat insulation layer (such as an air heat insulation layer and mica) 92 is provided between the coil 38 and a tubular component, in a hot runner type injection molding device wherein a part in the vicinity of each gate hole of a resin passage communicating with a cavity from the gate hole is constituted of the tip 36 formed of the tubular component to which high-frequency heating is applicable and heating is performed by supplying high-frequency electric power to a high-frequency induction heating coil 38 on the circumference of the tip 36 from a high-frequency electric power supply circuit.

Inventors

• 👤 Itsuo Shibata
• 👤 柴田　逸雄
• 👤 Tetsuo Uchida
• 👤 哲夫 内田

Bibliographic Details