A dispatch system and a dispatch method for manufacturing mold are provided. The dispatch system includes a control unit, a mold material storage unit, a processing cutter storage unit, an object pick-and-place and transfer unit, a mold processing unit and a mold product storage unit. The mold material storage unit includes many unprocessed mold materials. The processing cutter storage unit includes many processing cutters. The object pick-and-place and transfer unit is electrically connected to the control unit and disposed between the mold material storage unit and the processing cutter storage unit. One of the unprocessed mold materials and one of the processing cutters are transferred to the mold processing unit by the object pick-and-place and transfer unit, the unprocessed mold material is processed to form a mold product by the mold processing unit, and the mold product is transferred to the mold product storage unit.

A cutting head for a power tool. The cutting head includes a first jaw having a first blade mounting surface and a second jaw having a second blade mounting surface. The second jaw is rotatably coupled to the first jaw. The cutting head also includes a first blade removably coupled to the first blade mounting surface of the first jaw and a second blade removably coupled to the second blade mounting surface of the second jaw. A first cutting edge of the first blade is substantially co-planar with a second cutting edge of the second blade. During a cutting action, the first jaw and the second jaw rotate with respect to one another to bring the first cutting edge closer to the second cutting edge.

The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

A hydraulic power tool includes a housing defining a cylinder, a piston at least partially positioned within the cylinder and movable between a retracted position and an extended position, a clevis supporting a head of the power tool, a nut coupled to an outer peripheral surface of the clevis, and a collar coupled to the housing and surrounding the nut to axially constrain the nut between the collar and the housing while permitting relative rotation between the collar and the nut.

A cutting apparatus includes a blade changing apparatus. The blade changing apparatus includes a blade mounting and removal portion, which in turn includes: a holding portion that removably holds a circular base of a cutting blade; a moving support portion that supports the holding portion and moves the holding portion to a removal and mounting position at which an insertion hole in the blade faces a boss of a blade mount; and a coupling mechanism that couples the holding portion with the moving support portion such that the holding portion is freely tiltable with respect to the moving support portion. The coupling mechanism includes a plurality of elastic member pairs, each pair, while tensioning the holding portion in opposite directions, fixing the holding portion to the moving support portion. Forces acting from the elastic member pairs balance each other to thereby support the holding portion tiltably and aerially.

A hydraulic power tool includes a housing defining a cylinder, a piston at least partially positioned within the cylinder and movable between a retracted position and an extended position, a clevis supporting a head of the power tool, a nut coupled to an outer peripheral surface of the clevis, and a collar coupled to the housing and surrounding the nut to axially constrain the nut between the collar and the housing while permitting relative rotation between the collar and the nut.

A hydraulic power tool includes a housing defining a cylinder, a piston at least partially positioned within the cylinder and movable between a retracted position and an extended position, a reservoir containing hydraulic fluid, a pump for transferring hydraulic fluid in the reservoir to the cylinder, causing the piston to move from the retracted position toward the extended position, a return valve defining a rotational axis and positioned between the cylinder and the reservoir, and a valve actuator driven by the pump for opening the return valve, thereby fluidly communicating the cylinder and the reservoir, in response to a predetermined pressure being reached in the cylinder.

The present invention provides a method and apparatus of reducing current requirements by increasing resistance of the blade structure by reducing the cross sectional area of at least one section of the blade so that the electrical current requirements for heating of the blade to cutting temperature are reduced wherein the power supply and substantially entire unit may be mounted within a hand held unit. Methods of shaping blades to perform various heat distributions for specialty blades for custom cutting are disclosed. Further, an improved blade mounting structure is provided which includes structure for maintaining the legs of the blade parallel to the direction of cut and provides for easy insertion of new blades by maintaining a slotted blade cradle stable and in alignment with the blades and a clamp member away from the blade when the clamp mounting structure is loosened.

A device for changing a blade on shears, in particular for a rolled band, and to such shears in which a blade can be fixed to at least one blade support automatically by a tie bar pretensioned by a force accumulator. The device includes at least one adjusting element which can be actuated in order to release the blade from the blade support such that the tie rod is moved in an axial direction against the tie rod pretension. The adjusting element can be arranged on an outer face of the blade support or outside of the blade support.

A shearing blade for a cutting device includes a main body that has a seat and a blade insert that is arranged on the seat and forms a cutting wedge, wherein the cutting wedge forms a cutting edge via a flank face and a pressure face at an angle to the flank face. The seat has at least one undercut face that acts in a direction transverse to the flank face. When the blade insert is inserted, the undercut face interacts with at least one form-closure face formed on the blade insert, whereby a form closure taking effect transversely to the flank face is established. The blade insert is fastened to the main body by at least one pin-shaped plug-in connection element, which is oriented perpendicular to the flank face and which is arranged in aligned holes in the main body and in the blade insert.