| 摘要 |
Hot-runner system (100; 200; 300; 400), including: actuator plate (120); valve stem (106) of valve actuator (108); back-up pad (110); manifold bushing (118); gap (116A) located between plate (120) and stem (106); gap (116B) located between pad (110) and stem (106); gap (116C) located between bushing (118) and stem (106); and cooling system (114) to freeze drool (109) made to enter, under pressure, into gap (116A), gap (116B) and gap (116C), so that drool (109) that becomes frozen substantially reduces flow of drool (109) along stem (106) and toward actuator (108) wherein pad (110) includes cold inner surface (126) located proximate to stem (106), surface (126) cooled by system (114), portion of drool (109) becomes frozen once drool (109) touches surface (126), pad (110) defines drool-capturing chamber (112) to receive and to capture drool (109), and once drool (109) is received in chamber (112) touches surface (126), drool (109) solidifies so that drool (109) is prevented from entering gap (116B).
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