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METHOD OF AND APPARATUS FO RTESTING A TWO-STAGE BLOW HEAD
METHOD OF AND APPARATUS FO RTESTING A TWO-STAGE BLOW HEAD
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机译：测试两级吹头的方法和装置
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摘要
Apparatus for testing air flow through a dual-stage blowhead (48) that includes an adapter block (12) with a blowhead cup (18) for releasably receiving a dual-stage blowhead. The adapter block (12) has a first block passage (24, 26, 28) for feeding test air to a first inlet (30) of the blowhead for conducting blow air to a parison, and a seeond block passage (34, 38) for feeding test air to a second inlet (40) of the blowhead separate from the first inlet for conducting finish cooling air. Air is directed from a common source separately to the first and second block passages, and air flow is measured in each path. When air flow through the finish cooling air path is less than a predetermined threshold, or less than a predetermined ratio with respect to the final blow air, this may indicate a need to redrill or otherwise rework the finish cooling passages in the dualstage blowhead. IMAGE
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