Abstract: A lamination molding apparatus, including a chamber covering a molding region; a powder layer forming apparatus to form a material powder layer by discharging the material powder onto the molding region and planarizing the material powder on the molding region; a laser beam emitter to emit a laser beam for sintering the material powder to form a sintered body; a cutting machine to cut the sintered body; a horizontal drive device to move both the cutting machine and the powder layer forming apparatus in a horizontal direction parallel to the molding region; a first vertical drive device to reciprocate the cutting machine in a vertical direction orthogonal to the horizontal direction; and a second vertical drive device to reciprocate the powder layer forming apparatus in the vertical direction, is provided.

Abstract: A lamination molding apparatus, including: a chamber covering a desired molding region and being filled with an inert gas of predetermined concentration; a molding table configured to be vertically controllable in the chamber; a laser beam emitter to irradiate a predetermined irradiation region with a laser beam to form a sintered layer and irradiate a predetermined target irradiation position with the laser beam to form a sintered trace, the irradiation region being disposed on a material powder layer formed on the molding table for each of a plurality of divided layers obtained by dividing a desired three-dimensional object at a predetermined thickness.

Abstract: An improved lamination molding apparatus which can remove the fume swiftly and efficiently away from the optical pathway of the laser beam, is provided.

Abstract: An improved lamination molding apparatus which can maintain the inert gas environment in the chamber as well as remove the fume swiftly and efficiently away from the optical pathway of the laser beam, is provided.

Abstract: A metal 3D printer includes: a housing (1) forming a molding chamber (1B); a recoater head (3) reciprocating in the direction of a horizontal U axis in the molding chamber to form a powder layer of a metal; a laser irradiation device (9) irradiating an irradiation region in the powder layer with a laser beam to form a sintered layer; and an inert gas supply device (4). The inert gas supply device includes: a first suction port (V1) disposed on one (14) of the side walls facing each other in the direction of the U axis, which is far away from the irradiation region; a first blowout port (F1) disposed on a side of the recoater head to face the first suction port; and a second blowout port (F2) disposed to face the first suction port across the irradiation region.

Abstract: The manufacturing device manufactures a laminate shaped object by supplying material powder to a molding chamber to form a powder layer and irradiating a surface of the powder layer with a beam to sinter the powder layer. The molding chamber has a molding space where the material powder is irradiated with the beam and the laminate shaped object is formed, and a non-molding space which is outside the molding space and in which the laminate shaped object is not formed. An elastic member is disposed in the non-molding space, and the elastic member extends or contracts to change volume along with change of a relative position of the table in a vertical direction.

Abstract: A sinker electric discharge machining apparatus includes a quill 10, to which a tool electrode is attached, and a linear motor device configured to generate a linear movement of the quill towards a workpiece. The quill includes a plate member 11 made of a metal or an alloy, a first reinforcing member 51 fixed to a front surface 14 of the plate member, a second reinforcing member 52 fixed to the front surface of the plate member, a third reinforcing member 53 fixed to a back surface 15 of the plate member and disposed opposite to the first reinforcing member across the plate member, and a fourth reinforcing member 54 fixed to the back surface of the plate member and disposed opposite to the second reinforcing member across the plate member. The quill has a cross-section that is symmetric in a width direction of the plate member.

Abstract: A lamination molding apparatus capable of supplying a material powder steadily to a recoater head, is provided. A lamination molding apparatus including a chamber covering a desired molding region and being filled with an inert gas having a desired concentration; a recoater head moving in the chamber to supply a material powder on the molding region to form a material powder layer; and a material supplying unit to supply the material powder to the recoater head; wherein the recoater head includes a material holding section to hold the material powder; and a material discharging opening to discharge the material powder in the material holding section.

Abstract: A lamination molding apparatus which can improve the lamination molding accuracy, is provided. A lamination molding apparatus, including a chamber covering a desired molding region, the chamber being filled with an inert gas of a predetermined concentration; and a molding table provided in the molding region, the molding table being configured so as to be capable of being moved vertically by a driving mechanism; wherein the molding table is configured to be temperature-controllable; and a thermostatic section is provided in between the molding table and the driving mechanism or in the driving mechanism, temperature of the thermostatic section being maintained substantially constant, is provided.

Abstract: A lamination molding apparatus which can lower the oxygen concentration in a molding room in short time is provided. A lamination molding apparatus, including a molding room; a processing head; a driving device housing room housing a driving device moving the processing head; a partitioning section to partition the molding room from the driving device housing room; a discharging section to discharge gas in the molding room; and an inert gas supplying apparatus to supply the inert gas to both of the molding room and to the driving device housing room.

Abstract: A lamination molding apparatus which can remove the non-sintered material powder after completion of lamination molding easily and with less time after completion of laminating/molding, is provided. According to embodiments of the present invention, a lamination molding apparatus to conduct lamination molding using a material powder, including: a chamber filled with an inert gas having a predetermined concentration; a molding table provided in the chamber, the molding table being capable of moving vertically; a powder retaining wall surrounding the molding table so as to retain the material powder supplied on the molding table; and a powder discharging section provided on or below the powder retaining wall, the powder discharging section being capable of discharging the material powder, is provided.

Abstract: An improved lamination molding apparatus which can remove the fume swiftly and efficiently away from the optical pathway of the laser beam, is provided.

Abstract: An improved lamination molding apparatus which can maintain the inert gas environment in the chamber as well as remove the fume swiftly and efficiently away from the optical pathway of the laser beam, is provided.

Abstract: The manufacturing device manufactures a laminate shaped object by supplying material powder to a molding chamber to form a powder layer and irradiating a surface of the powder layer with a beam to sinter the powder layer. The molding chamber has a molding space where the material powder is irradiated with the beam and the laminate shaped object is formed, and a non-molding space which is outside the molding space and in which the laminate shaped object is not formed. An elastic member is disposed in the non-molding space, and the elastic member extends or contracts to change volume along with change of a relative position of the table in a vertical direction.

Abstract: A sinker electric discharge machining apparatus includes a quill 10, to which a tool electrode is attached, and a linear motor device configured to generate a linear movement of the quill towards a workpiece. The quill includes a plate member 11 made of a metal or an alloy, a first reinforcing member 51 fixed to a front surface 14 of the plate member, a second reinforcing member 52 fixed to the front surface of the plate member, a third reinforcing member 53 fixed to a back surface 15 of the plate member and disposed opposite to the first reinforcing member across the plate member, and a fourth reinforcing member 54 fixed to the back surface of the plate member and disposed opposite to the second reinforcing member across the plate member. The quill has a cross-section that is symmetric in a width direction of the plate member.

Abstract: An electric discharge machining apparatus includes a first movable body (40, 42, 50) movable along the Z axis, a ball screw (34), a motor (30) for causing rotation of the ball screw, a nut (35), attached to the first movable body, threadingly engaging the ball screw, a second movable body (10, 13) movable along the Z axis relative to the first movable body, capable of having the tool electrode attached thereto, and a linear motor (71, 72, 73) for moving the second movable body, for machining a workpiece by moving a tool electrode along a Z axis towards the workpiece while causing an electric discharge between the workpiece and the tool electrode. The linear motor includes a stator (73) attached to the first movable body, and a mover (71, 72) attached to the second movable body. The first and second movable bodies include respective electrode attachment units (50, 13).

Abstract: A method for purifying an exhaust gas using a transition metal-containing zeolite having a high hydrothermal stability having the formula, in terms of a molar composition of oxides:aA.sub.2 O.bM.sub.2/n O.Al.sub.2 O.sub.3.cSiO.sub.2.dH.sub.2 O(I)wherein a is 0.2 to 1.0, b is more than 0 but not more than 1.5, c is at least 10, d is an arbitrary number, A is potassium or cesium, M is a transition metal and n is a valence number of the metal M.

Abstract: A wire feeding device for a wire-out electroerosion apparatus comprising a movable table (21) on which one of two clamps (35,45) for clamping a wire in use (2a) and a new wire (2b) from a spare bobbin, respectively, is provided. When the bobbin on which the wire in use is almost empty, one of the clamps (35) is moved into position opposite the other clamp (45) to thereby present a sheared end of the wire in use and a leading end of the new wire into abutting relationship. A welding circuit (80) joins the abutted wire ends whereby the joined wire may be smoothly fed past the various wire guides and into the machining slit formed in the workpiece, whereby continuous machining operations may be performed.

Abstract: A method of controlling the operation of a cross helical rolling mill. The cross helical rolling mill has a pair of work rolls arranged at respective predetermined lead angles, and a pair of power-driven drive roller shoes arranged obliquely at predetermined lead angles on both sides of the rolling region formed between both work rolls. The method comprises controlling the rotation speed of each of the drive roller shoes in synchronism with the speed of rotation of the rolled material such that the difference in the peripheral speed between each of the drive roller shoe and the rolled material falls within a predetermined range, and, simultaneously with the control of the speed, controlling the driving torque applied to each of the drive roller shoes.