摘要:
This invention provides a flaskless molding apparatus for an upper and a lower mold that can produce molds comprised of molding sand with a substantially uniform density, the apparatus, comprising a match plate held between a cope flask and a drag flask, a squeezing mechanism having a plurality of upper and lower segmented-squeeze feet, wherein the upper and the lower segmented-squeeze feet are insertable into each opening of the cope flask and the drag flask respectively, which openings are opposite to the match plate, and wherein the squeezing mechanism can support and rotate the cope flask and the drag flask so that the mechanism allows the cope flask and the drag flask to be rotated clockwise or counterclockwise in a perpendicular plane about a supporting shaft and so that the cope flask and the drag flask can be perpendicular or horizontal, and a means for moving the segmented-squeeze feet, wherein the means can control the positions of the upper and the lower segmented-squeeze feet, which positions determine the condition of the molding sand in the molding spaces, according to the intervals between the match plate and each of the upper and the lower segmented-squeeze feet opposite to the match plate.
摘要:
When a molded article is obtained by which foamed sand is packed into a metallic mold, heated and solidified, vapor and gas that have been generated through the heating and solidification of the foamed sand are smoothly discharged from the cavity. A cavity C is formed by clamping a metallic mold 2, and foamed sand S is packed into the cavity C. When heating and solidifying the foamed sand S, a mold clamping force is reduced to form a slight gap L in the metallic mold 2 while maintaining the cavity C. Gas and water vapor that are generated when heating and solidifying the foamed sand S can be smoothly discharged from within the cavity C to the outside through the gap L, and thus the baking time of the foamed sand S can be shortened. Even if solidified binder accumulates on slits 16, gas and water vapor can be reliably discharged from within the cavity C to the outside via the gap.
摘要:
A molding device for sand mold, wherein a plurality of nozzles (42) are installed at the lower part (40) of a sand hopper (28) containing foundry sand (S1), a plurality of squeeze feet (46) installed at the lower part (40) of the sand hopper (28) to allow pressure control are positioned adjacent to each other at the sides of these nozzles (42), the sand hopper (28) is supported liftably by support means (22, 26), a molding space is formed of a pattern plate (72a) with a pattern (74a), a flask (4), a heap frame (52), and the sand hopper (28) having the plurality of squeeze feet (46) disposed at the upper part of the heap frame (52), foundry sand is discharged from the nozzles (42) to fill the foundry sand into the molding space, and the sand hopper is lowered toward the molding space to compress the foundry sand (S2) in the molding space by the squeeze feet, whereby the foundry sand can be filled into the molding space and the foundry sand can be compressed in one station (filling and compressing station).
摘要:
A method of operation for an apparatus for making an upper and a lower mold and the apparatus therefore that can prevent a mold from having a-wrap or a match plate from being damaged. The apparatus for making an upper and a lower mold of the present invention controls the forward movement of an upper and a lower squeeze member such that when they each move forward to the match plate by means of the squeeze means of the upper and lower molds the difference in the squeeze forces imparted by the upper squeeze means to the upper squeeze member, and the squeeze force imparted by the lower squeeze means to the lower squeeze member, is kept within the predetermined tolerance.
摘要:
The present inventions provide a method for forming molds and a core which generates no gases with bad effects on the human bodies while the binders are heated. In particular, the present inventions provide a method for forming molds and a core comprising an aggregate material mixture consisting of granular aggregate materials, wherein the aqueous binders and water are foamed with stirring, filled into a space for forming molds, and caked with an evaporating water component. In an embodiment, molds can be further cured by adding cross linking agents before and after they are taken out from the space for forming. Further, an aggregate material mixture for forming molds used for the method for forming molds of the present inventions is provided.
摘要:
This invention relates to a molding method and system using a molding apparatus with frames by which the amount of molding sand that overflows the molding apparatus and that must be taken out of a mold that is prepared by a molding operation is minimized and by which the density of the mold within a frame is substantially uniform. The molding sand filling cavity is defined by a pattern plate (2), a molding frame (3) that can be put on the pattern plate (2), a filling frame (4) that can be put on the molding frame (3), and a covering apparatus (5) having a plurality of squeezing feet (8) that can enter the filling frame and that can be temporarily held at certain positions where certain distances are kept between the lower ends of the squeezing feet and surfaces of the patterns on the pattern plate that are opposed to the lower ends. Molding sand is supplied to the molding sand filling cavity. Then, the molding sand is compressed by means of the squeezing feet.
摘要:
A molding device for sand mold, wherein a plurality of nozzles (42) are installed at the lower part (40) of a sand hopper (28) containing foundry sand (S1), a plurality of squeeze feet (46) installed at the lower part (40) of the sand hopper (28) to allow pressure control are positioned adjacent to each other at the sides of these nozzles (42), the sand hopper (28) is supported liftably by support means (22, 26), a molding space is formed of a pattern plate (72a) with a pattern (74a), a flask (4), a heap frame (52), and the sand hopper (28) having the plurality of squeeze feet (46) disposed at the upper part of the heap frame (52), foundry sand is discharged from the nozzles (42) to fill the foundry sand into the molding space, and the sand hopper is lowered toward the molding space to compress the foundry sand (S2) in the molding space by the squeeze feet, whereby the foundry sand can be filled into the molding space and the foundry sand can be compressed in one station (filling and compressing station).
摘要:
This invention relates to a molding method and system using a molding apparatus with frames by which the amount of molding sand that overflows the molding apparatus and that must be taken out of a mold that is prepared by a molding operation is minimized and by which the density of the mold within a frame is substantially uniform. The molding sand filling cavity is defined by a pattern plate (2), a molding frame (3) that can be put on the pattern plate (2), a filling frame (4) that can be put on the molding frame (3), and a covering apparatus (5) having a plurality of squeezing feet (8) that can enter the filling frame and that can be temporarily held at certain positions where certain distances are kept between the lower ends of the squeezing feet and surfaces of the patterns on the pattern plate that are opposed to the lower ends. Molding sand is supplied to the molding sand filling cavity. Then, the molding sand is compressed by means of the squeezing feet.