Patent GB-329912-A (GB)
Title: Improvements in rotary machines for continuously making compressed slabs or floor-tiles with coloured designs
IPC: B28B13/02
Filed: 1929-08-14
Abstract: 329,912. Druart, H. Aug. 14, 1929. Rotary - mould - table machines.-Tiles are moulded and decorated automatically and continuously. A series of moulds, for example twenty-four, are spaced radially on the intermittently-rotating table 7, Fig. 2. A pattern plate is placed automatically into each mould and then colours run in to a large number of moulds simultaneously from colour-boxes on an upper table having a to-and-fro angular motion. Each mould comprises a rectanglar box frame secured to the table by outwardly-projection flanges 4. A mould plate 17 with guided depending members 12 rests on the pedestal 10 and forms the bottom of the box. The pattern 23 has apertures registering exactly with the apertures 18 in the mould plate and is swung by means of arms 22 from an inactive position at the side of the mould into a horizontal position above the mould. Rollers 37 engage with ramps to maintain the patterncarrier in the acting position against the action of springs 36. The pattern-carrier frame supports a second frame 27, Fig. 8, adjustably therein and connected thereto by trigger-mechanism 30, 32, 33 and 34 at its outer end. The pattern is held between the frames 23, 27 and disengaged therefrom by gravity upon operation of the triggermechanism. The colour-delivering devices, for example seventeen, each have a stencil corresponding to the portion of the design to appear in that particular colour. Each of the colourcontaining hoppers 47, Figs. 11 and 12, is fitted with a slide 51 reciprocated by projections on the mould table engaging adjustable nose-pieces 62, 66 in turn. A regulatable charge of colour thus is delivered to a second hopper 48. Each mould carries a series of superposed slide-operating members 43, Fig. 10, any number of which can be turned to project beyond the periphery of the table and so actuate the slides of the corresponding hoppers 47 to deliver the various colours used on any particular tile. The second hopper 48 is lowered so that the stencil 49 rests on the mould. Movement of the upper table actuates the roller 87, Fig. 15, and swings the pivoted bar 83 so as to rotate cams 78 through the medium of connecting-rods 81. The cams actuate levers 77 to lower yokes 76 connected to the stencil-holding frame by means of rods 72. When the roller 87 is released by the return movement of the upper table, the stencil is raised again by the balance weights 112. The swinging of the bar 83 also positions a member 105 in the path of lugs 100 on the upper table, whereby a reciprocating movement is imparted to the hopper 48 through connecting rods 107 to distribute the colour. After all the colours have been delivered and distributed from the various hoppers the pattern is removed from the mould and the pedestal 10, Fig. 17, underneath, the latter then is raised by the cam 116 to press the pattern 23 into close engagement with the mould and to lock it therein. The walls formed by the pattern are then filled with the material forming the body of the tile by hopper-mechanism generally similar to the colour-delivering mechanism. At the next movement of the mould table, the pedestal 10 is placed in register with a ram 126, Fig. 26, and the material is compressed against a buffer 127. The buffer is moved fonvards with the mould at the completion of the pressing operation by the member 134 and finally tripped in the position shown in dotted lines for restoration bv the counterweight 132. At the next stage posts 206, 206<1>, Figs. 19 and 20, are raised by cams on a rotary table 200 to raise the mould plates relatively to the pedestals. One of these posts raises the pressed article and at the same time a member 225, operated by cam mechanism 219, is thrust beneath the raised article to receive it for delivery. The other post raises the mould plates of the emptied mould again to receive the patterncarrier ready for the commencement of a fresh operation. The moulds are cleared automatically by means of bellows (not shown). The piston of the press III, Figs. 1 and 2, for pressing the tiles is connected by a balanced beam 252 to the piston of a smaller press I for controlling the movements of the machine. Rocking of the beam controls the angle of swing of a member 264 connected to the upper table. The member 264 also rotates the lower table through the medium of a pawl 269.