| 摘要 |
1448443 Making containers; seaming box blank by injection moulding AIRFIX INDUSTRIES Ltd 10 Oct 1973 [10 Oct 1972 22 March 1973] 46582/72 and 14015/73 Headings B5D and B5A [Also in Division B8] An apparatus for making a container by folding a blank (see Division B8) into a desired shape and seaming juxtaposed edges of the folded blank with injected thermoplastic material, includes a guide 12, (13), Fig. 4 (not shown), for positioning the base panel B of the blank between a core tool 10 and a split female tool whose halves 14, 15 are mounted in a base tool 16 for movement towards one another as the split tool 14, 15 is moved into the base tool 16. The blank guide comprises opposed channelled rails 12, (13) along which the blank is fed under gravity and which may be stationarily or displaceably mounted for movement, either in the axial direction of the core tool 10 or laterally, upon closing of the core tool and the split tool. In the embodiment shown in Fig. 3 the rails 12, (13) are displaced in said axial direction by a stripper plate (41b), Fig. 4a (not shown), which is movable with the core tool. The guide may be stepped as shown in Fig. 5 to position the blank. In alternative arrangements the blank is positioned by one or more stops and by moving the guide rails towards one another, either by pivoting the or each rail about its lower region or by moving the or each rail laterally. In another arrangement, Fig. 6 (not shown), the blank is positioned by a stop (12<SP>1</SP>) and solenoids (12d, 13d) which can project through the rails and engage the blank side edges. The guide rails include cut-away portions 12e, 13e on the sides remote from the split tool. In a multi-impression form of the apparatus, adjacent edges of adjacent blanks may be guided in common guide rails Fig. 7 (not shown), of substantially S crosssection. The blanks are fed to the guide rails from a magazine, Fig. 14 (not shown). The core tool may have one or more vacuum openings in its leading face or one or more retractable projections on said face or a retractable vacuum head for engaging and holding the blank base panel B. A stripping ring 41 on the core tool 10 is engageable with the split tool to cause the closing of the tool halves 14, 15 upon forward movement of the core tool. The stripper plate (41b) which is spring-biased against a core tool support 11, engages a stop on retraction of the core tool 10 and causes the stripping ring 41 to strip a container from the core tool. The split tool is spring-urged away from the base 16a of the base tool 16. The thermoplastics material is injected from a nozzle (117a), Fig. 10 (not shown), into channels running adjacent the juxtaposed side and upper edges of the folded blank held in the cavity between the core tool, the split tool and the base tool. |
