Hydraulic press and method for pressing objects
AssigneeMoviator Oy
InventorPertti Hänninen
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Abstract
A hydraulic press and a method of pressing different kinds of objects, such as briquettes. The hydraulic press includes a body cylinder (1) housing a fluid space (2) and a working piston (3) whose rod (3a) extends to the outside of the body cylinder (1), the working piston (3) being adapted to be moved in the fluid space (2) by hydraulic pressure. The hydraulic press also comprises a pressure accumulator (4) as well as a hydraulic circuit with valves. Inside the working piston (7) moved by hydraulic pressure, a striking piston (7) moving along with the working piston (3) and quickly movable relative to the working piston (3) by hydraulic pressure, is provided. In addition, a separate impact body (10) is provided between the striking piston (7) and the object (14) pressed by the hydraulic press.
Claims11
A hydraulic press comprising a body cylinder (1) housing a fluid space (2) with a first fluid space (2a) and a second fluid space (2b) and a working piston (3) whose rod (3a) extends to an outside of the body cylinder (1), the working piston (3) being adapted to be moved in the fluid space (2) by hydraulic pressure, the hydraulic press comprising a pressure accumulator (4), and inside the working piston (3) moved by hydraulic pressure, a striking piston (7) moving along with the working piston (3) and movable relative to the working piston (3) by hydraulic pressure, is provided, and in that, between the striking piston (7) and an object (14) pressed by the hydraulic press, a separate impact body (10) is provided, wherein inside the rod (3a) of the working piston (3), between the striking piston (7) and the impact body (10), a variable volume fluid space (7b) is provided, having an oil flow orifice (15) connected to a hydraulic channel to fill the variable volume fluid space (7b) for the purpose of moving the striking piston (7) to its striking position and to empty the variable volume fluid space (7b) for the purpose of carrying out a striking movement of the striking piston (7).
A method of pressing objects by a hydraulic press comprising a pressure accumulator (4) and a body cylinder (1) housing a fluid space (2) with a first fluid space (2a) and a second fluid space (2b) and a working piston (3) whose rod (3a) extends to an outside of the body cylinder (1), the working piston (3) being adapted to be moved in the fluid space (2) divided into the first fluid space (2a) and the second fluid space (2b), wherein pressing takes place in two successive steps, the first one thereof being carried out hydraulically by the movement of the working piston (3), and the second step be carried out by an impact body (10) connected to the hydraulic press and receiving a quick stroke from a striking piston (7) provided inside the working piston (3) and brought into a striking movement by applying a substantially high pressure from the first fluid space (2a) on a first end of the striking piston (7) and by opening to a hydraulic channel connected to an oil supply orifice (15) in a fluid space (7b) which prevents the striking piston (7) from moving towards an object (14) to be pressed.
Dependencies are inferred from the claim text.