| 摘要 |
1,066,322. Making filter elements. WALKER MANUFACTURING CO. March 24, 1964 [March 25, 1963], No. 12365/64. Heading BID. [Also in Division B5] Apparatus for making rigidized filter bodies comprises a cylindrical mould 84, Fig. 7, having a flanged bottom 86, a central core 89, an annular compressing ram 94 and a cover 95 movable between closed and open positions. A core heating element 92, an external heating element 93 and a cover heating element 186 are provided. The cover 95 is moved by rack and pinion actuated mechanisms and a locking mechanism 104, 106 is provided. Before closure a metal cap 99 is located on the charge in the mould. The mould is carried by a rotary table 15 and the ram 94 is connected by rods to a spring-loaded head 111 which is periodically moved upwardly by a piston 112 and held in the operated position by spring-loaded latches 115. To eject the moulded article the head 111 is located, on indexing of the table, over a piston (113) (Fig. 1, not shown) and is moved upwardly thereby to move the latches 115 to their release positions where they are held by detents 126 which are released on return movement of the head. A piston actuated stripper (132) pushes the ejected article into a chute. As described the apparatus includes a plurality of moulds 16 located in pairs on the table 15 alternately in inner and outer series. In operation pre-weighed resin-impregnated charges of fibres are fed into a set of tearing rollers (12) leading to ducts (13) from which compressed air feeds the charge to vertically disposed pre-mould cylinders. The connection between each duct (13) and its cylinder being such as to create a tangential downwardly spiraling flow. The cylinder 14, Fig. 7 has a cylinder head 55 an apertured base plate 51 and a fixed central core 56 to define an annular space within which a ram 73 operates. The cylinder 14 has rows of slits 79 which serve to effect uniform distribution of the fibres. A plate 52 beneath the base plate 51 is slidable between closed and open positions to allow pre-compression of the fibres and transfer of the fibre charge from a cylinder 14 to a mould 16 aligned therewith by a piston head 61. The table 15 is indexed to five stations. At station 1 the rack and pinion mechanism (131) operates to swing a pair of covers 95 to their open positions. At station 2 ejection and stripping of the moulded articles are effected. At station 3 feeding and pre-compression of charges in two moulds takes place. At station 4 end caps 99 are located in positions and covers 95 are moved to their closed positions. At station 5 the covers 95 are locked and rams 94 are given their compression strokes. The moulded articles are maintained compressed and heated between stations 5 and 1. |
