Cutting plate and method and compression mold for producing a green body of the cutting plate
AssigneeWalter AG
InventorDavid BOEHNKE
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AssigneeWalter AG
InventorDavid BOEHNKE
Estimating the term…
A compression tool, a cutting plate and a method of producing a cutting plate by multiaxial pressing a powder mixture of a hard metal component and a binder to form a green body is provided. After pressing, the body has two parallel main surfaces and a peripheral edge surface extending between and connecting the main surfaces. The main surfaces include depressions, such that cutting edges are formed at the intersection of the bottom of the depressions and at least a part of the edge surface. A heading tool includes a main punch and an independently moveable form punch. In a first pressing step, the form punch is moved towards the powder mixture to form a preliminarily compressed portion. In a second step, the main punch and the form punch are both moved towards a final position to provide the green body with its final dimensions including the depressions
A compression tool for producing plate shaped green bodies by multiaxial pressing, the green bodies each having two substantially parallel main surfaces and a peripheral edge surface connecting the main surfaces, each green body being comprised of a powder mixture of hard metal and a binder, wherein the compression tool defines a cavity for receiving the powder mixture and includes at least two side punches moveable towards each other, wherein front faces of each of the side punches are arranged to form at least a part of the edge surface of the green body, wherein one of the side punches may be replaced by a fixed side wall of a die, wherein there are provided two heading tools on two remaining opposite sides of the cavity, which are moveable towards each other along a common axis and perpendicular to a plane defined by the main surfaces, each of the heading tools including at least two parts, a main punch and an independently moveable form punch, a cross-section of which extends to the front face of at least one side punch, wherein a front face of the form punch is moveable towards the cavity beyond a front face of the main punch in order to form a depression such as a web thinning of the green body.
Dependencies are inferred from the claim text.