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[Intro]2015-01 Method for curing cold-box foundry shape with gaseous catalystPatent No.: WO2013013015Date of Patent: 2013-01-24 Inventor(s): Wang Xianping?Assignee: ASK Chemicals?[US]The use of gaseous catalysts, especially tertiary amines, as cur

2015-01 Method for curing cold-box foundry shape with gaseous catalyst

Patent No.: WO2013013015

Date of Patent: 2013-01-24 

Inventor(s): Wang Xianping?

Assignee: ASK Chemicals?[US]

The use of gaseous catalysts, especially tertiary amines, as curing agents in the cold box process of curing phenol formaldehyde and poly-isocyanate resins is known. When these tertiary amines were used individually, the preferred boiling point is below 100 °C to permit evaporation and to achieve satisfactory concentration of amine in the injected gas mixture. In addition to the upper limit, there is also a lower limit of preferred boiling point. For example, TMA is a gas at ambient temperatures (bp of about 3 °C), making it more difficult to handle than the higher boiling amines. The lower molecular weight amines in general, with DMEA (bp of 44-46 °C) as a specific example, tend to have a strong ammonia odor, making them unpleasant to work with. TEA (bp of 89 °C) tends to condense out of the gas mixture, especially in the winter, indicating the practical upper limit for boiling point is well below 100 °C. The present invention relates to improvements in the device and process for curing a binder in a foundry mix to form a foundry shape in a "cold-box" process for making cores and molds. In the improved process, at least two gaseous catalysts are used, in a sequential manner. The improved device allows the sequential use of the catalysts. In best use practices with the present invention, the first catalyst used is less active in curing the binder than the second catalyst. By arranging the amounts of the respective vaporous curing catalysts and the contact times, as well as by using the less active vaporous curing catalyst first, the total amount of curing catalyst used to effect the cure is reduced. Carrier gas may be used with the respective vaporous curing catalysts. Typically, the vaporous curing catalysts are tertiary amines having between three and six carbon atoms. This guideline also helps to avoid condensation of the amine in the mold. 

2015-02 Copper alloy and method for producing copper alloy   

Patent No.:EP2692877 (A1) 

Date of Patent:2014-02-05 

Inventor(s):Inoue Akihisa, et al 


The present invention provides a beryllium-free copper alloy with high strength, high electric conductivity and good bending workability as well as a method of manufacturing the copper alloy. The copper alloy has a composition (by atom%): Cu100-a-b-c (Zr,Hf)a(Cr,Ni,Mn,Ta)b(Ti, Al)c [wherein 2.5<a<4.0, 0.1< b<1.5 and 0<c<0.2; (Zr, Hf) means one or both of Zr and Hf; (Cr, Ni, Mn, Ta) means one or more of Cr, Ni, Mn and Ta; and (Ti, Al) means one or both of Ti and Al], and has Cu primary phases in which the mean secondary dendrite arm spacing is 2 μm or less and eutectic matrices in which the lamellar spacing between a metastable Cu5(Zr,Hf) compound phase and a Cu phase is 0.2 μm or less.

2015-03 Method and device for casting a piston for an internal combustion engine   

Patent No.:US8720528

Date of Patent:2014-05-13

Inventor(s):Stephan Silvio

Assignee: Stephan Silvio?[DE]

In pistons for internal combustion engines, the strength of the piston-pin bores is of particular importance. The required strength can be achieved in particular by rapid quenching of the casting. According to the current procedure, such quenching only takes place outside the mold, when the piston as a whole has solidified to such an extent that it can be removed from the mold. The invention provides a method and a device for casting pistons for internal combustion engines, with which the strength, in particular in the region of the piston-pin bores, can be improved. After boundary layer solidification in the region of at least one piston-pin bore, at least one sleeve is withdrawn and that region is cooled by cooling agent supplied through at least one sleeve. As a result, the region of the piston-pin bores, in particular the largely cylindrical inner face, can be cooled and quenched more quickly than that with the current procedure, so the strength in those regions is advantageously increased. The casting device has at least one sleeve which can be withdrawn from the region of a piston-pin bore and through which a cooling agent for cooling the region of the piston-pin bores can be supplied. 

2015-04 Technology of production of bimetallic and multilayer castings by gravity or spun casting 

Patent No.: US8746322

Date of Patent: 2014-06-10

Inventor(s): Svoboda; Arnost 

Assignee: Cronite CZ S.R.O.[CZ] 

The present invention provides a method of producing bimetallic and multilayer castings by gravity or spun casting. It comprises: providing a mould having a mould cavity, sequentially casting at least two different metal materials in the mould by pouring in the mould cavity a first molten material and then pouring in the mould cavity a second molten material over the first molten material, and feeding from a burner a flame of hydrogen gas into the mould cavity before the starting of the pouring of the second molten material in the mould cavity. The hydrogen gas flame passes through the mould cavity to consume all oxygen in the mould and then escapes to further burn in a free space above the mould, wherein  the flame is continuously fed into the mould cavity after pouring in the first molten material until the second molten material is poured into the mould cavity. The second molten material is poured after a time delay to allow for realization of a solidified coating in the first molten material while the flame is fed into the mould. The burner comprises a tube and the aflame hydrogen is fed through the tube. 

2015-05 Method of making long ingots (cutting in furnace) 

Patent No.: US8746323

Date of Patent: 2014-06-10

Inventor(s): Jacques; Michael P., et al 

Assignee: TI International Metals, Inc. [US]

The invention is an apparatus comprising a furnace, a continuous casting mold, a metal casting pathway, a cutter and a first annular barrier. The continuous casting furnace is configured for efficiently continuously casting ingots, including titanium alloy ingots. The furnace is configured with an internal cutter for cutting an ingot within the furnace interior chamber. The furnace typically includes a first interior chamber in which a continuous casting mold is disposed and a withdrawal chamber which is separable from the first interior chamber to facilitate withdrawal of finished ingots while casting continues within the first chamber. The apparatus further comprises an isolation valve below the barrier, wherein the barrier is adapted to prevent the cuttings from falling onto the isolation valve, and an ingot lift below the barrier, wherein the barrier is adapted to prevent the cuttings from falling onto the ingot lift.

2015-06 Method for producing melt supply pipe for aluminum die casting   

Patent No.: US8771789 

Date of Patent: 2014-06-08

Inventor(s): Masuda; Jun,?et al 

Assignee: Toshiba Kikai Kabushiki Kaisha [JP]

The invention provides a method for producing a melt supply pipe. The melt supply pipe is composed of an inner ceramic pipe and an outer steel pipe fitted to the inner pipe, for connecting a melting furnace and a plunger sleeve of a die casting machine. The method includes: forming a Ni alloy layer over the inner circumferential surface of the outer steel pipe; burying the outer pipe with the Ni alloy layer in TiC powder, and heating the pipe and the powder under vacuum in a vacuum heating oven to a temperature at which a liquid phase is generated from the Ni alloy, thereby bonding the TiC particles to the surface of the Ni alloy layer; and fitting the inner ceramic pipe into the outer pipe with the TiC particles bonded to the inner circumferential surface, thereby assembling the melt supply pipe.

2015-07 Casting core for forming a cooling channel in a piston 

Patent No.: US8733315

Date of Patent: 2014-05-27

Inventor(s): Kollotzek; Helmut, et al 

Assignee: Mahle International GmbH [DE]

The invention is a soluble and substantially ring-shaped casting core. Using the casting core can form a cooling channel in a piston having at least one inflow and one outflow. The casting core may form a closed ring and the inflow may be arranged directly adjacent to the outflow. The casting core may have a cross-sectional taper for forming a choke in the circumferential direction between the inflow and the outflow.

2015-08 Coated sand and manufacturing method for a mold

Patent No.: WO2014098129

Date of Patent: 2014-06-26

Inventor(s): Tanaka Yuichiro,? et al 

Assignee: Asahi Organic Chem Ind. [JP]

The purpose of the present invention is to provide a dry state coated sand with superior normal temperature fluidity, and a method for manufacturing a mold with superior characteristics using that coated sand. The dry state coated sand is formed by mixing a refractory aggregate that has been heated with an aqueous water glass solution as a caking additive and evaporating the water to form a coating layer of the caking additive on the surface of the refractory aggregate. The moisture percentage is adjusted to 0.5% by mass or less. After this dry state coated sand is filled into a molding cavity of a forming die, solidification or curing of this coated sand is carried out by ventilating with water vapor and a targeted mold is obtained. 

2015-09 Foundry coating composition

Patent No.: US8778076

Date of Patent: 2014-06-15 

Inventor(s): Haanepen; Martinus Jacobus, et al 

Assignee: Foseco International Limited [GB] 

The invention provides a  foundry coating composition for molds and cores, a process for preparing coated foundry molds and cores, and coated molds and cores obtainable by the process. The foundry coating composition comprises a liquid carrier, a binder, and a particulate refractory filler. The particulate refractory filler comprises a first (relatively coarse) fraction having a particle size of d>38 μm and a second (relatively fine) fraction having a particle size of d<38 μm. No more than 10% of the total particulate refractory filler has a particle size of 38 μm<d<53 μm and no more than 50% of the second (relatively fine) fraction is constituted by calcined kaolin. The foundry coating composition is applied to molds and cores to assist in the removal of the casting from the mold and prevention of casting defects. The composition is applied to molds and cores in a single step to obtain molds and cores with a surface coating (comprising particles of d>38 μm) and an absorbed coating (comprising particles of d<38 μm).

2015-10 Sequential aging of aluminum silicon casting alloys 

Patent No.: US8728258

Date of Patent: 2014-05-20

Inventor(s): Doty; Herbert W. 

Assignee: GM Global Technology Operations LLC [US]

The present invention provides a method of using a multiple step artificial aging process for an automotive engine component made from an aluminum silicon alloy casting comprising relatively thick regions and relatively thin regions. The method comprises (a) solution heat treating the casting to dissolve alloying elements, followed by cooling; (b) rapidly heating the casting to a nucleation temperature in a range of 400 °F to 500 °F at a rate of at least 1.5 °F·min-1 such that a heating rate differential between the relatively thick regions and relatively thin regions is no greater than 7 °F·min-1, and holding at a temperature at least equal to the nucleation temperature for a time sufficient to induce nucleation throughout the casting; (c) cooling the casting to a temperature about 100 °F or more lower than the nucleation temperature; (d) heating the casting to a temperature lower than the nucleation temperature to facilitate growing precipitates as distinct phase in the casting, and (e) cooling the casting to ambient temperature. A liquid heat treating medium or a fluidized bed furnace is used to achieve the rapid heating.

2015-11 Aluminum alloy having excellent high-temperature characteristics   

Patent No.: EP2719784

Date of Patent: 2014-04-16

Inventor(s): Tanaka Toshiyuki,? et al 

Assignee: Akobe Steel Ltd. [JP]

The present invention provides an Al alloy having excellent high-temperature characteristics (heat resistance, high temperature fatigue strength, creep resistance under high temperatures, and high temperature yield strength). Its chemical compositions comprises 0.1 -1.0 mass% of Si, 3.0-7.0 mass% of Cu, 0.05-1.5 mass% of Mn, 0.01-2.0 mass% of Mg, 0.01-0.10 mass% of Ti, and 0.05-1.0 mass% of Ag, Zr being restricted to less than 0.1 mass%, and the remainder consisting of Al and unavoidable impurities.

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