Sintokogio, Ltd.

Takayuki Komiyama

Minoru Hirata

Yutaka Hadano

Shuji Takasu

Koichi Sakaguchi

Tsuyoshi Sakai

Toshihiko Oya

Takuya Nitta

Tomohiro Aoki

Shuichi Tsuzuki

Takanobu Tozaki

Yasuo Moribe

Shuichi Ide

The present invention includes: an injection container unit; a lid member; and an ejection air supply section configured to press a foamed mixed material in the injection container unit with compressed air and thereby eject the foamed mixed material through an ejection port, the lid member being provided with a sealing body configured to deform when a fluid is injected and thereby make close contact with the inner circumferential surface of the injection container unit during the pressing.

Molding machine

The present invention includes: a connector unit configured to disconnectably connect an injection container unit and a lid member; and a vertically driving mechanism configured to cause the injection container unit and the lid member to move up and down together when the injection container unit and the lid member are connected together and to cause the lid member to move up and down when the injection container unit and the lid member are not connected together.

A molding machine which allows a simplification of a sand filling operation, and the prevention of the formation of a bridge and an air channel in the sand tank, so that the sand filling operation of the molding machine is able to be performed steadily. The molding machine of the present invention includes: a sand tank for storing molding sand to be introduced to a molding flask; a pair of upper and lower sand filling nozzles to guide the molding sand in a horizontal direction, where the molding sand is supplied from a pair of upper and lower sand introducing parts which are located at the lower part of the sand tank; and at least one filter part with a plurality of air-injecting apertures on its entire body, which is attached to at least the entire inner surfaces of the pair of sand introducing parts; wherein the molding sand is fluidized by air injected through the air-injecting apertures of the filter part, and introduced to the molding flask through the sand filling nozzles.

Disclosed is a molding machine for simultaneously making upper and lower molds with cope and drag flasks, a matchplate, upper and lower squeezing boards, and a lower filling frame. This machine also includes a cylinder for raising and lowering the lower squeezing board, a driving mechanism that includes pneumatic and hydraulic piping systems for driving the cylinder using an air-on-oil system, and a controller for controlling the driving mechanism. The drag flask, the matchplate, the filling frame, and the lower board define a lower molding space, while the matchplate, the upper board, and the cope flask define an upper molding space such that the controller controls the driving mechanism to drive the cylinder at a low pressure. The lower squeezing board is raised to squeeze the molding sand for simultaneously making the two molds such that the controller controls the driving mechanism to drive the cylinder at a high pressure.

Molding machine and molding process

The present invention is to provide a machine and a method for suctioning and exhausting air from a storage tank for sand in a molding machine that has less on-off valves and prevents sand from adhering to the interior of the valve for exhausting air while the air is being exhausted. The machine for suctioning and exhausting air from the storage tank for the sand in the molding machine comprises a storage tank for sand in the molding machine, a porous body that is provided in the storage tank for sand and that is distant from an inner face of the storage tank for sand, an empty chamber that is formed by an outer face of the porous body and the inner face of the storage tank for sand, a seal that is placed at a rim of a tip of a nozzle of the storage tank for filling sand and that expands when compressed air is supplied inside the seal, a pilot-operated valve for both suctioning and exhausting air that is fluidly connected to the empty chamber, and an on-off valve that is fluidly connected to the pilot-operated valve for both suctioning and exhausting air and connected to an inside of the seal.

Machine and a method for suctioning and exhausting air from a storage tank for sand in a molding machine

A process and machine for simultaneously making an upper and lower flaskless mold, the process including defining a lower molding space by a drag flask that can enter or leave a molding space in which the molds are made, a match plate having patterns on the upper and lower surfaces and mounted on an upper surface of the drag flask, a lower filling frame provided with molding-sand introducing ports and connectable to the lower end of the drag flask to allow the lower filling frame to ascend and descend, and an ascendable and descendable lower squeeze board, and defining an upper molding space by a cope flask provided with molding-sand introducing ports and being mountable on the match plate to allow the cope flask to ascend and descend, and an upper squeeze board that is opposed to and fixedly provided above the match plate; simultaneously introducing molding sand into the upper and lower molding spaces; squeezing the molding sand by raising the lower squeeze board to make the upper mold and a lower mold; drawing the upper molds from the match plate; and stripping the upper mold from the cope flask, while stripping the lower filling frame from the lower mold.

Molding process for simultaneously making an upper mold and a lower mold and a flaskless molding machine

The present invention provides a flaskless molding machine that can use a matching plate of different thicknesses. The flaskless molding machine has two molding flasks that have a matching plate sandwiched between them, the two molding flasks being positioned in a way such that one of opening ends of the molding flasks is opposed to each other and each of the other opening ends of the molding flasks is engaged with a squeezing board, and a pair of spaces is formed, into which spaces molding sand is filled by air through each of the openings for introducing the molding sand, disposed on a wall of each of the two molding flasks that are opposed to each other, the flaskless molding machine thus constituted being able to mold two molds by squeezing the molding sand with the squeezing boards.

Flaskless molding machine

A molding machine that defines upper and lower mold cavities while cope and drag flasks, having a match plate sandwiched therebetween, are rotated from a horizontal position to a vertical position. An upper squeeze member is insertable into the cope flask. A pressure-applying plane of the upper squeeze member defines an upper mold cavity together with the match plate and the cope flask. A pivoting frame supports the cope and drag flasks, having a match plate sandwiched therebetween, and the upper squeeze member, such that they rotate in unison between a horizontal position to a vertical position. A fixed filling frame abuts the drag flask when the cope and drag flasks are in the vertical position. A lower squeeze member has a pressure-applying plane that is oriented horizontally. The pressure-applying plane of the lower squeeze member defines a lower mold cavity together with the match plate, the drag flask, and the filling frame.

A flaskless molding method, wherein a match plate () is held between an upper flask () and a lower flask () and squeeze plates () and () are inserted into the openings of the upper flask () and the lower flask () to form an upper manufacturing space and a lower manufacturing space with initial volumes. A foundry sand is filled in the upper and lower manufacturing spaces with the initial volumes through the supply ports of the flask () and () (first filling). Next, the squeeze plates () and () are retreated to expand the upper and lower manufacturing spaces more than the initial volumes. The foundry sand is filled again in the expanded upper and lower manufacturing spaces through the supply ports (second filling). After the second filling is completed, the squeeze plates () and () are advanced to compress the foundry sand in the upper and lower manufacturing spaces so as to manufacture the upper and the lower flasks stacked on each other.

Flaskless molding method

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 includes a match plate having patterns 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 openings of each 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 positioned perpendicular or horizontal, and a device for moving the segmented-squeeze feet, wherein the device can control 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 intervals between the match plate and each of the upper and the lower segmented-squeeze feet opposite to the match plate.

Flaskless molding apparatus for an upper and a lower mold

This invention provides a method for changing a match plate in a molding apparatus for a flaskless upper mold and a lower mold, which method allows easy change of the match plate. This invention is comprised of a first step for moving a existing match plate placed in the apparatus to between a cope flask and a drag flask of one set of flasks in the perpendicular position, and for holding a new match plate between a cope flask and a drag flask of another set of flasks in the horizontal position, a second step for rotating the cope flask and the drag flask holding said existing match plate from the perpendicular position to the horizontal position, and for rotating the other cope flask and the drag flask holding the new match plate from the horizontal position to the perpendicular position, and a third step for moving the new match plate from the perpendicular position to the apparatus, and for moving the existing match plate from the horizontal position to the outside of the apparatus.

Method of changing a match plate in a flaskless molding apparatus for an upper mold and a lower mold

The disclosed invention provides a molding machine that defines upper and lower molding spaces while cope and drag flasksand a match plateclamped therebetween are rotated from a horizontal position to a vertical position, and that readily places a core into a lower mold within the drag flask. An upper squeeze memberis insertable into the cope flaskwith its pressure-applying plane being opposed to the upper face of the match plate. The pressure-applying plane defines an upper molding space together with the upper face of the match plateand the cope flask. A pivoting framesupports the cope and drag flasks, a match plateclamped therebetween, and the upper squeeze member, such that they rotate in unison between a horizontal position, in which the pressure-applying plane of the upper squeeze memberis oriented vertically downward, to a vertical position in which the pressure-applying plane is oriented horizontally. A fixed, vertical, filling frame abuts the drag flaskwhen the flasksand the match platethat is clamped therebetween are in the vertical position. A lower squeeze memberhas a pressure-applying plane that is oriented horizontally, and is insertable into the filling frame and the abutting drag flask. The pressure-applying plane of the lower squeeze memberdefines a lower molding space together with the lower face of the match plate, the drag flask, and the filling frame. To place a core into a lower mold within the drag flask, the drag flaskis laterally moved from a position that is immediately beneath the cope flasksuch that an open working space is provided.

A method and apparatus for molding molds having no flask wherein a match plate having a pattern is put between a pair of an upper and a lower flask having intakes for foundry sand. An upper and a lower molding space are defined by inserting an upper and a lower squeeze device into openings of the pair of the upper and the lower flask having no match plate, and the pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular and then the intakes of the flasks move upward. The upper and the lower molding space are then filled with the foundry sand. The foundry sand in the molding space is squeezed by the squeezing device. The pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed, the flasks are matched to each other, and the molds are removed from the pair of flasks.

Method and apparatus for molding an upper and a lower mold having no flask

A method and apparatus for molding molds having no flask wherein a match plate is put between an upper and a lower flask having intakes for foundry sand. An upper and a lower molding space are defined by inserting an upper and a lower squeeze device into openings of a pair of the upper and the lower flask having no match plate, and a pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular, and are moved so that the intakes of the flasks move upward. The upper and the lower molding space are filled with the foundry sand. The foundry sand in the molding spaces is squeezed by the squeeze devices. A pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed. While the preceding processes are being carried out, if necessary a core can be installed between the molds, the flasks are matched to each other, and the molds are removed from the pair of flasks.

Growing community of inventors

Toyokawa, Japan

Takayuki Komiyama