Abstract:
PROBLEM TO BE SOLVED: To provide a powder kneading apparatus which has improved durability.SOLUTION: The powder kneading apparatus is configured in such a way that a rotary blade 58 is provided at a lower part of a rotary shaft 22 extending in a vertical direction and an upper side of the rotary shaft 22 is a driving side. At a middle part of the rotary shaft 22, contact type seals 82 are arranged with intervals up and down and further a cooling passage for supplying cooling oil to an oil reservoir 76 formed by being partitioned by the contact type seals 82 is formed. An air reservoir 64 is formed between the rotary blade and the contact type seals 82 and further an air supply passage 66 for supplying air to the air reservoir 64 is formed. Thus, when rotation of the rotary shaft 22 stops, air is supplied to the air reservoir 64 via the air supply passage 66.
Abstract:
PROBLEM TO BE SOLVED: To provide a powder suction type kneading apparatus which can sufficiently make powder wet and has simple structure and improved durability.SOLUTION: In the powder suction type kneading apparatus, a powder chamber 60 is provided at one side of a rotary blade 58 and a liquid chamber 62 is provided at the other side, powder and liquid are mixed at a slit part 56 formed between a fixed blade 50 and the rotary blade 58, and a through-hole 52C which makes the slit part 56 communicate with the liquid chamber 62 is formed at the rotary blade 58.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for kneading paste, capable of preventing foreign matters generated by abrasion from mixing with paste.SOLUTION: The apparatus 100 for kneading paste includes a container 110 for paste 170 to be stored having been kneaded and stirred. The container 110 includes an inflow port 111c disposed above the liquid surface LF of the paste 170 stored therein to allow the paste 170 to flow thereinto. A feeding means 150 of feeding the paste 170 to the inflow port 111c is disposed outside the container 110. A thin-film forming means 160 is disposed inside the container 110 to form a thin film 171 alongside the inner wall face 111b of the container 110, from the paste 170 fed thereinto via the inflow port 111c. The thin-film forming means 160 includes a scraper 161 that thinly spreads the paste 170 fed thereinto via the inflow port 111c and a spacer 162 that contacts the inner wall face 111b and determines a gap T1 between the scraper 161 and the inner wall face 111b.
Abstract:
PROBLEM TO BE SOLVED: To provide metal powder for a dust core in which high insulation properties are maintained even when, for increasing the electric resistance between each powders, the amount of insulated coating applied to the surface of the powder is remarkably reduced or is made zero, and thus both of high saturated magnetic flux density and high electric resistance are improved. SOLUTION: Pure iron powder having grain size of 10 to 500 μm and purity of ≥99 mass% is heated to the temperature range of 600 to 1,000°C, Si is concentrated on the surface of the pure iron powder in the above temperature range by vapor phase reaction, the average Si concentration in the depth range from the surface to 1 μm of the concentrated layer is controlled to 0.05 to 2 mass%, and thereafter, an Si oxide layer with a thickness of 1 to 500 nm is formed on the surface of the powder by oxidation treatment. COPYRIGHT: (C)2010,JPO&INPIT