| 摘要 |
1498518 Shearing; consolidating scrap LINDEMANN MASCHINENFABRIK GmbH 18 April 1975 [13 May 1974] 16133/75 Headings B3H and B3W A hydraulic scrap shearing machine in which an open feed channel 9, wider than the mouth of the shear 1, has a movable side wall which comprises the working faces of independently operable main auxiliary hydraulic cylinders 15 and 19 respectively, the face of the ram 19 next to the shear being shorter in the feed direction than that of ram 15. The ram 19 as shown is mounted on the ram 15 and initially both are advanced together. If the scrap resists their combined force, the ram 19 is operated independently. A ram 11 can then advance the scrap into the shear by the distance y and the remaining scrap, already deformed at H, can often be squashed to the mouth width by the combined rams although a further operation by the ram 19 above may be necessary. A pivoted lid 22 adjacent the mouth is actuated by a hydraulic cylinder 23 to squash scrap in front of the shear mouth and a hydraulic holddown (4). The width of the mouth may be reduced by inserting a plate 26, Fig. 4. In an alternative embodiment, Figs. 5-7, the auxiliary ram (27) is mounted on the frame and a pin (28) projecting from the ram 27 engages in a slot (29) in the wall of the main ram the length of the slot determining the independent stroke of the ram (27).
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