Patent GB-612823-A (GB)
Title: Improved glass working machine
IPC: C03B9/29
Filed: 1945-08-24
Abstract: 612,823. Glass manufacture. HADDAN, R. (Corning Glass Works). Aug. 24, 1945, No. 21761. [Class 56] [Also in Groups XXIV, XXVIII and XXX] In a glass-blowing machine a number of separable mould assemblies are spaced around the circumference of a circular rotary member with their axes normal to the axis thereof and are operated by linkages engaging stationary cam grooves. Figs. 1, 2 and 3 together show a machine in which parison mould assemblies 12 on a drum 11 (see also Fig. 4) with associated compacting plungers 13, Fig. 12, co-operate with spring-loaded divided neck rings 14 carried on an endless conveyer 20 to form charges of glass from a feeder 10 into parisons 35. The parisons, suspended from the neck rings, are transferred thereby to composite finishing moulds comprising bottoms 45 carried by a conveyer 46 and sides 52 carried by conveyers 50, 51, Fig. 4, but during their free travel they are subjected to air puffs from a puff-box 39 to which the neck rings are con. nected by blowheads 36, carried on a conveyer 37; means are provided for locking the finishing mould sides together around the rings 14 and bottoms 45, during final blowing from a blow-box 47 to which the blowheads pass on leaving the puff-box 39. After withdrawal of the blowheads, the finishing mould sides are unlocked and withdrawn by their conveyers (means being provided to avoid rotation of the mould elements during the initial withdrawal movement), the neck rings are opened by cams 60 and withdrawn, and the finished ware is finally picked up from the mould bottoms 45. The five conveyers are driven by a single electric motor 32, the transmission being through lugs on the drum 11 engaging the link running rollers in the case of the neck ring conveyer 20, and through chains passing over sprockets and engaging teeth on the conveyer links in the case of the remainder; for relative adjustment there are included in the intermediate gearing four synchronizing units each comprising a longitudinally adjustable sleeve, splined axially internally and helically externally, interposed between a similarly splined driving shaft and driven sleeve. The mould halves 52 are detachably mounted on the links of their conveyers to allow substitution of halves of varying height, the support 365 for the mould bottom and mould half conveyers being adjustable on screw jacks 366 for this purpose. (For details of the conveyer driving mechanisms, and of the means for locking the finishing mould sides together and for preventing their rotation during initial withdrawal, see Group XXX.) Parison moulds.-The mould bodies are divided in a plane at right angles to the axis of the drum 11, Fig. 12, and each top is divided in a plane passing through the axis, a side half 15 and top half 16 (pivoted on a post 151) being mounted on a bell-crank 171 pivoted at 172 to a slide 156 running on a rail 174 on the drum 11 and operated by a groove 176 in a fixed drum-cam 160; the bell-crank 171 also carries a sector gear 180 engaging a rack 181 having limited sliding movement on a rail 182, and a roller 184 engaging a cam-plate 185 secured to the drum 11, this mechanism causing the mould half 15 to be withdrawn laterally at first and then to be tilted about the pivot 172 until it is clear of the neck ring conveyer link 240 and track support 190, Fig. 1. Each mould top half 16 is rotated about its post 151 by a link 154 connecting it to a slide 155 mounted within the slide 156 and operated by a groove 159. Plungers.-Each neck ring tube 231 seats on a sleeve 44 through which a plunger 13 is projected in two stages by an air motor 131, the piston 136 causing the initial movement (before the charge is fed in), and the piston 137 the final movement (as the charge is being received), the air supply being controlled by a slide valve 133 rotating with the drum 11 over a stationary adjustable air reservoir 132. This air motor normally withdraws the plunger after formation of the parison, but if it should fail, a racked slide 212 operated by a cam'216 rotates the pinion 143 (through intermediate gearing) to withdraw the plunger before the path of the neck ring diverges. The plunger may be water cooled through pipes 201, 203. Cushioning air may be supplied, as the charge is being received, through a tube 162 leading to the bore of the sleeve 44. Neck rings.-The ring halves, one of which is shown at 235, Fig. 7, are urged together by spring-loaded bell-cranks 246 carrying rollers 255 engaged by the cams 60, Fig. 3. Blowheads.-Air from the outlets 221 of the puff-box 39, Fig. 7, or of the blow-box is conveyed to the neck ring tubes 231 by shoes 38, bellows 227 and -blowhead tips 226, the amount thereof being controlled by valves 225. This arrangement is similar to that described in Specification 276,606, [Class 56].