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1. 发明授权

US4898056A Method and tool for punching plaster plates 失效
标题翻译：用于冲压石膏板的方法和工具
公开(公告)号：US4898056A
公开(公告)日：1990-02-06
申请号：US228809
申请日：1988-07-29
申请人： Finn Grobb , Kurt Hvalso , Benni Madsen
发明人： Finn Grobb , Kurt Hvalso , Benni Madsen
IPC分类号： B26F20060101 , B26F1/02 , B26F1/14 , B26F1/38 , B28B11/12 , B28D20060101 , B28D1/22 , B28D1/26 , E04B1/84
CPC分类号： B26F1/02 , B26F1/14 , B28D1/222 , Y10T83/8834 , Y10T83/9435 , Y10T83/9437 , Y10T83/944
摘要： In order that holes may be produced in a simple and safe manner in a plaster plate (1) to be used as sound adjuster in a room, holes (15) are punched out of the plate, e.g. in the shape of slits, by means of a cutting tool. Hereby the considerable dust and noise inconveniences caused by the hitherto known machining are avoided. By slits (15) that must lie close to each other, it is possible to punch in two stages, i.e. first with double distance and then in the space between. This prevents fracture of the plaster and tearing of any paper that may be on the surface. The cutting tool is provided with punches (7, 8), in a shape corresponding to the holes. Each punch is provided with an inclined blade (10) which forms an angle of the horizontal of 13.degree.. The cross sectional shape of the blade is V-shaped, with two blades (11) running along the sides of the punch. In this manner the material (9) is punched out in a gentle and even manner, whereby is obtained a perfect hole free from burrs and fractures of the plaster in the edge area.
摘要翻译：为了在石膏板（1）中以简单和安全的方式生产孔以便在室内用作声音调节器，孔（15）从板上冲出，例如，以切口的形状，通过切削工具。因此避免了由迄今已知的加工引起的相当大的灰尘和噪音的不便。通过必须彼此靠近的狭缝（15），可以以两个阶段，即先是双重距离然后在其间的空间中进行冲压。这可以防止石膏断裂和撕裂任何可能在表面上的纸张。切割工具具有与孔相对应的形状的冲头（7,8）。每个冲头设置有倾斜叶片（10），其形成水平面为13°的角度。叶片的横截面形状是V形的，两个叶片（11）沿着冲头的侧面延伸。以这种方式，以柔和均匀的方式冲压材料（9），从而获得在边缘区域中没有毛刺和石膏断裂的完美孔。

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