Patent GB-190906110-A (GB)
Title: Improvements in Machinery for the Manufacture of Earthenware Pipes, Retorts and the like.
Inventor: YARROW MATTHEW
IPC: B28B21/54
Filed: 1909-03-15
Granted: 1910-04-14
Abstract: 6110. Yarrow, M. March 15. [Cognate Application, 16,127/09.] Extrusion machines.-Relates to machines of the class described in Specification 18,446/07, [Class 99, Pipes &c.], for moulding pipes, retorts, &c. A collapsible core f, for making the grooves in the socket, is connected to a barrel core a, both being supported on a central shaft b. The collapsible parts of the core f are moved inwards while the core is in position in the machine by means of a sleeve b<2>, which is rotated by a suitable tool inserted through an aperture in the barrel core a. The grooves in the spigot end of the pipe are formed by hinged annular moulds h, and by a ring k which is rotated on a sleeve j by means of a handle k' and which is connected to the sleeve j by a pin and inclined slot arrangement so that as the ring k is rotated it rises or falls. In a modification shown in Fig. 2, the collapsible core f and the upper part of the barrel core a' are supported from the usual core g, and the lower part a<2> of the barrel core is connected to and moves with the ring k above described. The upper part a' of the barrel core has a slight vertical movement relatively to the collapsible core, so that, when the table descends, it falls slightly to allow air to enter between it and the collapsible core, and, when the pipe is finished, it rises to cut off the fringe of clay that escaped while the barrel is being made. The central shaft b<5> is connected by a cross-bar b<7> and slot b<8> with the lower part a<2> of the barrel core, and by means of a squared end with the depending shaft b4. Inclines on the upper end of the shaft b<5> engage corresponding inclines on the sleeve carrying the the upper part of the barrel core, so that when the shaft b<5> is rotated, on the completion of a pipe, the part a<1> of the core is raised. After the spigot part of the pipe has been made, the table with the parts j, k, a<2> descends, and, when the barrel is formed, the ring k is rotated, thus causing the shaft b<5> to be rotated and the part a<1> to be raised. The shaft b<5> is then in a position to descend. The table i<1> may be automatically released by weighted levers r<10>, r<11>, cams r, r<6> and projections r<4> in a similar manner to that described in Specification 27,354/07. The dies d are moved outwards and inwards and are locked in position by means of pivoted slotted levers operated by pins on a rotating ring o, Figs. 1 and 2. This rotating ring also moves a knife radially inwards and causes it to rotate for the purpose of cutting off the finished pipe. The collapsible core and the movable part of the barrel core may be suspended from the ordinary core, and the movable parts of the collapsible core may be operated from the ring o, Fig. 1, through bevel-gearing. As shown in Fig. 2, the movable parts of the collapsible core are moved by means of a slotted disk rotated by the shafts b<4>, b<5> and the ring k. The sleeve j on the table i<1> may have a hinged tilting part to facilitate removal of the pipe. Specification 6392/02 is also referred to.