GB426172A - Improvements in processes and machines for the manufacture of pipes by centrifugal action - Google Patents

Abstract

426,172. Casting-machines. SOC. ANON. DES HAUTS-FOURNEAUX & FONDERIES DE PONT - A - MOUSSON, Pont - a - Mousson, Meurthe & Moselle, France. July 9, 1934, No. 20144. Convention date, July 10, 1933. [Class 83 (i)] Castings, extracting.-After casting a pipe in a centrifugal inclined mould 3 during its downward movement, the cast pipe is extracted from the stationary mould. The mould is then cleaned and a socket core fitted so that when moved up it is ready for the next cast. The pipe may be extracted by a clamp 34 carried by a truck C<2> having a short free movement, limited by stops 20, 23, on a truck C<1> which is reciprocated by a rope 15 and wheel 19 driven by an electric motor controlled by switches 71<a>, 71<b>. Starting from the position shown in Fig. 2, but with the extracted pipe 5 removed, the switch 71<b> is closed by hand to move the truck C<1> upwardly to the left to introduce the clamp into the socket end of a pipe in the mould, a stop 22 on the truck C<1> acting on an arm 67 to withdraw a stop 68 and an arm 24 reversing a series of two-way valves 62 controlling fluid pressure supply to cylinders 58 which thus lower a series of roller supports 56. The truck C<1> is arrested by the stop 72 on the rope 15 opening the switch 71<b> and then engaging a positive stop 73. The clamp 34 is then expanded by moving a handle 41, Fig. 7, in the direction of the arrow this acting through rods 39, 37 to move a wedge 36 to the right. Switch 71a is then closed and the truck C<1> moves down to the right and, when stops 20, 20<1> engage, the truck C<2> is moved also to extract the pipe, the arm 24, Fig. 2, reversing the valves 62 and thus raising the rollers 56 to support the pipe. The truck C<1> is arrested by its arm 17 opening a switch 71<a> and a stop 74 on the rope engaging the stop 73. Before the truck C<1> actually ceases to move a stop 28 engages a spring pressed arm 27 which has a projection 26 to engage a roller 48 on the lever system for operating the chuck and thus collapses the jaws 34 as shown in Fig. 7. At the same time the projection 22 engages the arm 67 and thus moves the stop 68 into the path of the pipe 5. The truck C<2> is then free to run down to the right and is arrested by the stop 23. If the pipe 5 sticks or breaks in the mould it is extracted by a hook 75, Fig. 13, having a handle 76 which can be engaged by hooks 21 on the carriage C<1>. In a modification, the clamp is attached to a chain 84, Fig. 16, which passes over a wheel 82, on a piston rod 81, and is fixed at 85 so that when fluid is admitted to a cylinder 79 the pipe 5 is pulled out of the mould on to supports 87.