The present invention pertains to: a continuous casting mold used in manufacture of steel or the like; and a manufacturing method for the continuous casting mold. A coating layer 12 of a self-melting alloy is formed, by laser cladding, on a molten steel contact surface of a base material 10 of a continuous casting mold, the coating layer containing less foreign matter, being densely formed and having excellent adhesion to the base material 10. Due to the foregoing, a continuous casting mold having excellent durability against heat, corrosion and friction can be obtained.
The present invention comprises: a cylindrical case 14; a trigger member 15 which has a distal end that is axially slidably held inside a base end of the case 14, and has a base end that projects from the base end side of the case 14; a knocker pin 16 which has a base end that is axially slidably held inside a distal end of the case 14, and has a distal end that projects from the distal end side of the case 14; a hammer member 17 which is accommodated inside the case 14 between the trigger member 15 and the knocker pin 16, and is slidable in the axial direction of the case 14; a first coil spring 18 which is disposed between the trigger member 15 and the hammer member 17; and a second coil spring 19 which is disposed between the hammer member 17 and the knocker pin 16.
A continuous casting mold 10 has a mold space section 13 surrounded by a pair of short sides 11 positioned facing each other with a gap therebetween, and a pair of long sides 12 sandwiching the short sides 11 from both width-direction sides thereof. Chamfer formation sections 15 are provided to the short sides 11 in regions R at the four corners of a mold wall 14, which is formed from the pair of short sides 11 and the pair of long sides 13 and which forms the mold space section 13, and the chamfer formation sections 15 project toward the mold space section 13. Molten steel is injected into the mold space section 13, cooled, and drawn out as a slab. The mold-space-section-13-side surface of the chamfer formation section 15 is constituted from a plurality of continuous linear sections 16, 17 formed such that horizontal cross-sections thereof project toward the mold space section 13. An angle θ1 formed by the linear sections 17 that are in contact with or adjacent to the long sides 12, relative to mold-space-section-13-side surfaces S1 of the long sides 12, is greater than 60 degrees and less than 90 degrees. An abrasion-resistant film is formed on the mold-space-section-13-side surfaces of the chamfer formation sections 15.
The present invention is provided with: a heat-retaining container 11 which has an opening 12 in an upper part thereof and which is equipped with a container body 13 for retaining a cleaning liquid therein and an opening and closing lid 14 for opening and closing the opening 12; a pump 20 which is housed inside the container body 13; an actuating switch 21 which is for the pump 20 and which is attached to the top face 18 of the opening and closing lid 14; a hose connection 24 which is attached to the top face 18 of the opening and closing lid 14; an ejection hose 25 which connects between an ejection port of the pump 20 and a base side of the hose connection 24; a showerhead 32 which is connected to another side of a shower hose 30 having one side detachably connected to a leading side of the hose connection 24; an anti-splash cover 38 which is mounted to a leading side of the showerhead 32; and an illumination part 40 which is detachably attached to the showerhead 32 and which has a light source 42 for illuminating a leading side of a nozzle 31 within the anti-splash cover 38.
A microneedle array to be used instead of a syringe has, at a tip side of each microneedle, two or four puncture portions disposed facing each other. The puncture portions each have a part of a side surface of each microneedle as outer surfaces, respectively, and one of the puncture portions is shorter than the other(s). A housing section capable of holding a drug is formed by inner surfaces of the puncture portions of each microneedle. The housing section opens toward the tip side and lateral directions orthogonal to an axis core of each microneedle, and has a central bottom surface at a bottom end. The inner surfaces facing each other and forming the housing section of each microneedle each have a downward slope, with a width between the inner surfaces getting narrower as it goes down from tips of the respective puncture portions toward the central bottom surface.
A61M 37/00 - Other apparatus for introducing media into the bodyPercutany, i.e. introducing medicines into the body by diffusion through the skin
A61M 5/32 - NeedlesDetails of needles pertaining to their connection with syringe or hubAccessories for bringing the needle into, or holding the needle on, the bodyDevices for protection of needles
This microneedle array is provided with a feature allowing the microneedle array to be used in place of a syringe. A tip part of each microneedle 10 is provided with two puncture parts 14, 15 which are arranged facing each other and have outer side surfaces 12, 13 formed by portions of the side surface of the microneedle 10. One of the puncture parts 14, 15 is shorter than the other. Inner surfaces 16, 17 of the facing puncture parts 14, 15 define a storage part 19 capable of holding a drug. The storage part 19 extends along the axial center of the microneedle 10, is open at the tip and both sides, and has a central bottom surface 18 at the bottom. The facing inner surfaces 16, 17, which form the storage part 19, are inclined downward so that the width between the inner surfaces 16, 17 grows progressively narrower from the tips of the puncture parts 14, 15 down to the central bottom surface 18.
A culture promoter comprising a pyrrole compound is added to a medium in which an oxygen-generating photosynthetic organism is grown and then the medium is kept under the growth conditions of the organism. The aforesaid pyrrole compound preferably comprises a tetrapyrrole compound and an alga is usable as the oxygen-generating photosynthetic organism. Thus, a growth promotion method for an oxygen-generating photosynthetic organism, which can be carried out by an economical, safe and simple procedure, is provided.
A roll 10 has a roll body 11 that is provided, at both ends thereof, with support shafts 12, 13; a thermally-sprayed coating 14 that has abrasion-resistance and anti-scratch property and is made to have a surface roughness Ra within a range of 1-15 µm by shot blasting is formed on the surface of the roll body 11 that has been subjected to blasting treatment; the thermally-sprayed coating 14 contains 70-95 mass% of a thermally-sprayed base material a, and 5-30 mass% of nickel powder as a blending material; and the thermally-sprayed base material a contains 10-30 mass% of chromium carbide, and 5-15 mass% of nickel, with the remainder being at least 95 mass% tungsten carbide. A production method according to the present invention includes a first step for subjecting the surface of the roll body 11 to blasting treatment, a second step for thermal-spraying a coating material onto the surface, and a third step for subjecting the surface to shot blasting treatment so as to make the surface roughness Ra fall within a range of 1-15 µm.
C23C 4/04 - Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
B21B 39/00 - Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
A continuous casting mold (10) comprises long-side copper plates (11, 12) disposed facing one another, short-side copper plates (13, 14) disposed facing one another between the long-side copper plates (11, 12), and long-side support mechanisms (17, 18) and short-side support mechanisms (21, 22) respectively supporting the long-side copper plates (11, 12) and the short-side copper plates (13, 14). The long-side support mechanisms (17, 18) are provided with attachment members (15, 16) which abut and directly support the long-side copper plates (11, 12). The thickness of the long-side copper plates (11, 12) is more than 8 mm and less than 35 mm, and the second moment of area of the attachment members (15, 16) about a horizontal axis is at least 10 times the second moment of area of the long-side copper plates (11, 12) about a horizontal axis.
A mold for continuous casting that comprises casting mold members (11 to 14) which comprise: casting mold main bodies (11a to 14a) constituted of either copper or a copper alloy; and a diamond-like-carbon layer (21) disposed, through a rigid protective layer (20), as the inside layer of each of the casting mold members (11 to 14) with which a molten steel or a shell formed by solidifying the molten steel comes into contact. The casting mold members (11 to 14) in this case can be of a type comprising a pair of short sides and a pair of long sides or be of a cylindrical type. Since the diamond-like-carbon layer (21) has been formed, through the rigid protective layer (20), as the inside layer of each of the casting mold members (11 to 14) with which a molten steel or an ingot comes into contact, the friction between the mold (10) for continuous casting and the molten steel or ingot is minimized.
Disclosed is a precision polishing method for polishing a surface to be polished of a workpiece (14) by rotating a polishing surface plate (11) that has a polishing pad (10) attached to the upper surface thereof, and pressing said surface to be polished against the surface of the polishing pad (10) while dropping, onto the surface of the polishing pad (10), a polishing slurry (12) in which fullerene hydroxide or a fullerene hydroxide aggregate has been dispersed, wherein a micropattern of fine protrusions (15) having a height (H) of from 0.1 to 20 µm is formed on the surface of the polishing pad (10), the fine protrusions being dispersedly arranged such that the distance (D) between the apexes of adjacent fine protrusions (15) is 1.1 to 60 µm and the distance (G) between the bottom parts of adjacent fine protrusions (15) is 1 to 50 µm.
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