GB1112086A - Moulding apparatus - Google Patents

Abstract

1,112,086. Core-making machines. DEPENDABLE SHELL CORE MACHINES Inc. 21 May, 1965, No. 21557/65. Heading B3F. Devices for moulding articles, i.e. multiple core-boxes 30, 32 for moulding cores, are mounted (in halves 30a-30b, 32a-32b, shown open) on plates 34, 35, 37 movable along rods 22 -24 of a mounting 16 and on another plate 38 non-movable on the rods, so that, when a wheel 100 is turned, an arm 102 is swung and a pivoted link 104 extends to push the movable plates and their core-box halves together and against the end-plate 38, Fig. 3 (not shown), ready to be heated and to receive resin-coated sand; when the wheel 100 is reversed the box halves are separated, to the positions shown, as determined by headed link-rods 128, 132, for the cores to be loosened by vibrators 136, 138. The link-rods are free-running one above the other in holes in an ear 124 on an intermediate assembly (including the plates 35, 37 and corebox halves 30b, 32a in fixed relation) but one end of each is adjustably secured by nuts to an ear 122 or 126 on the plate 34 or 38. When the core-box halves 30a-30b, 32a- 32b are closed together, Fig. 3 (not shown), they are heated by gas burners 92. Then, when a treadle 118 is depressed, a latch 114 is released and the whole mounting 16 is swung upside down by hand about a horizontal axis, on end bearings 12, 14 mounted on pillars 10, Fig. 1 (not shown). A container (106) slung beneath the mounting is thus inverted and discharges (by gravity or air pressure) resin-coated sand, through apertures 112 in a board 110, into the core boxes 30, 32. After a period of time, the mounting 16 is swung upright again and excess sand flows back into the container, the wall thickness of the shell cores remaining having been determined by the time of heating.