| 摘要 |
1,191,184. Blow-moulding; removing surplus. H. MEHNERT. 11 Aug., 1967 [17 Aug., 1966]. No. 36890/67. Heading B5A. In a blow-moulding apparatus, the surplus portion of a blown article is separated by a tool 17 loosely fixed in a rotating pinion 14a, 14b operated by a rack 25. The apparatus comprises mould halves 1a, 1b having top portions 8a, 8b which have an annular groove 13 in which fits a two-part pinion wheel 14a, 14b carrying a cutting tool 17. The tool is loosely fitted in channel 15 in the pinion and when inoperative, occupies recess 23. On rotation of pinion 14 by rack 25, the tool is cammed forward by the outer surface of channel 22 into its cutting position, limited by shoulder 28. A plurality of cutting tools and corresponding recesses may be used. A worm wheel and screw may replace the rack and pinion. Articles having wide necks relative to the parison width, as in Fig. 1, may be produced with a substantial expansion ratio, or double articles may be produced in one cavity (Fig. 3, not shown), or articles having outwardly or inwardly directed flanges (Figs. 4a, 4b, not shown) may be produced. The tool 17 may be replaced by a blade 39, (Fig. 5, not shown).
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