摘要:
By mixing, stirring and kneading, with water glass (11) as a binder, sand (7), a surfactant (9), and water (10), foamed sand (S) is generated. The foamed sand (S) is packed in a cavity of a metallic mold and solidified to form a sand mold. By using the sand mold, aluminum is cast. By using water glass that is an inorganic binder, during casting, harmful gas and odor are not generated. Further, when a molar ratio n of water glass (Na2O nSiO2 mH2O) is adjusted in the range of 0.65 to 1.30, a quantity of water (H2O) generated by heating water glass with a high temperature melt during casting can be suppressed. Thereby, hydrogen gas (H2) according to a reaction between water (H2O) and aluminum (Al) can be suppressed from being generated and casting quality can be improved.
摘要:
A device for forming foamed kneaded material and a method for forming foamed kneaded material are obtained capable of filling a pattern forming space of a mold with foamed kneaded material in a well foamed condition. First, a supply device supplies a foamed kneaded material (a) into a cylinder (20) (first process). Then, in a state in which an internal space (22) of the cylinder (20) is communicated with a pattern forming space (14) of a mold (12), the piston (26) disposed in the cylinder (20) is moved toward the foamed kneaded material (a) side while opening a gas release hole (40A) formed piercing through the piston (26) (second process). Then, at a timing when the piston (26) has reached an expected position (X) where the piston (26) is expected to be on contacting the foamed kneaded material (a) supplied into the cylinder (20), the gas release hole (40A) is closed by an open-close plug (40B) (third process). Then, the foamed kneaded material (a) supplied into the cylinder (20) is pressed toward the pattern forming space (14) side of the mold (12) by moving the piston (26) toward the foamed kneaded material (a) side (fourth process).
摘要:
Sand for a casting mold including sand (1), a binder (2), and an inorganic compound particle (3) having poor water solubility and generating a gas (4A), which is at least one of water vapor or carbon dioxide gas, by heat from a molten metal.
摘要:
[TASK] To provide a mold forming apparatus capable of reliably causing a foamed mixture to appropriately fill a cavity of a forming mold by a simple configuration, and capable of achieving reduction in size. [MEANS OF SOLVING THE PROBLEM] The mold forming apparatus includes: a storage tank 1 that has in its bottom 1a a plurality of injection ports 10 capable of being opened and closed, and that stores a foamed mixture; a forming mold 2 that has a plurality of runners 20, corresponding to the injection ports 10, into which the foamed mixture is introduced through the injection ports 10 of the storage tank 1, and that has cavities 21 for forming the introduced foamed mixture into a mold in a predetermined shape; and pressing means 3 that is disposed so as to correspond to the forming mold 2 and that presses the foamed mixture stored in the storage tank 1 to inject the foamed mixture into the cavities 21 through the runners 20 of the forming mold 2, wherein a parting surface 22 of the forming mold 2 is formed parallel to a pressing direction P of the pressing means 3, and the runners 20 of the forming mold 2 are formed in the parting surface 22 and are tilted with respect to the pressing direction P of the pressing means 3 so as to spread apart from inlets 20a toward outlets 20b guided to the cavities.
摘要:
[TASK] To provide a mold forming apparatus capable of reliably causing a foamed mixture to appropriately fill a cavity of a forming mold by a simple configuration, and capable of achieving reduction in size. [MEANS OF SOLVING THE PROBLEM] The mold forming apparatus includes: a storage tank 1 that has in its bottom 1a a plurality of injection ports 10 capable of being opened and closed, and that stores a foamed mixture; a forming mold 2 that has a plurality of runners 20, corresponding to the injection ports 10, into which the foamed mixture is introduced through the injection ports 10 of the storage tank 1, and that has cavities 21 for forming the introduced foamed mixture into a mold in a predetermined shape; and pressing means 3 that is disposed so as to correspond to the forming mold 2 and that presses the foamed mixture stored in the storage tank 1 to inject the foamed mixture into the cavities 21 through the runners 20 of the forming mold 2, wherein a parting surface 22 of the forming mold 2 is formed parallel to a pressing direction P of the pressing means 3, and the runners 20 of the forming mold 2 are formed in the parting surface 22 and are tilted with respect to the pressing direction P of the pressing means 3 so as to spread apart from inlets 20a toward outlets 20b guided to the cavities.
摘要:
A device for forming foamed kneaded material and a method for forming foamed kneaded material are obtained capable of filling a pattern forming space of a mold with foamed kneaded material in a well foamed condition. First, a supply device supplies a foamed kneaded material (a) into a cylinder (20) (first process). Then, in a state in which an internal space (22) of the cylinder (20) is communicated with a pattern forming space (14) of a mold (12), the piston (26) disposed in the cylinder (20) is moved toward the foamed kneaded material (a) side while opening a gas release hole (40A) formed piercing through the piston (26) (second process). Then, at a timing when the piston (26) has reached an expected position (X) where the piston (26) is expected to be on contacting the foamed kneaded material (a) supplied into the cylinder (20), the gas release hole (40A) is closed by an open-close plug (40B) (third process). Then, the foamed kneaded material (a) supplied into the cylinder (20) is pressed toward the pattern forming space (14) side of the mold (12) by moving the piston (26) toward the foamed kneaded material (a) side (fourth process).