| 摘要 |
<p>In a glassware forming machine of the individual section type a servo-invert device is made of a support arm of the parison, of a toothed wheel (33) and of a rack (32); in addition an electric motor particularly a brushless motor (14) is actuating the reciprocating movement of the rack (32) by means of a ball circulating screw shaft (26) and of a lead nut (28). The brushless motor is provided by lower airtight means (18, 29) and by upper airtight means (36, 37) of an internal ambient (24) of the motor in such a way as to the lower airtight means ensure that the ball circulating screw shaft is in a lubricating oil bath, whereas the upper airtight means ensure that the screw shaft and the lead nut as well as the lubricant oil are protected from polluting substances, which are dragged by the cooling air, said air being circulating in an external ambient, where each individual section is operating.</p> |
