JP2005111514A - Molding machine for shell-mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding machine for shell-mold with which a metallic mold is heated with a metallic mold heating mechanism, molding sand is supplied into a damp-box with a sand supplying device, a metallic mold box and the damp-box are turned over in a closed opening state where they are mutually covered, the molding sand is spouted and dropped down by centrifugal force onto the metallic mold from a place positioned at a place where the damp-box reaches its upper position, the metallic mold box and the damp-box are brought into a developed and opened openig state and the sand is heated by a metallic mold heating device and hardened by heating from the metallic mold and above the sand using thermosetting resin as sintering agent and one side of mold in one pair of molds is molded and which has improved molding work efficiency ability and simple structure. <P>SOLUTION: The molding machine for shell-mold, is provided with a metallic mold box 1 having the metallic mold 2 and the metallic mold heating mechanism 4, the sand supplying device 5 in which the molding sand W using the thermosetting resin as the sintering agent can be held, the opened opening-state damp-box 7 which can receive the molding sand, the metallic mold heating device for heating the metallic mold and a rotating mechanism 10 with which the metallic mold box and the damp-box are turned over in a closed opening state where they are mutually covered and the molding sand is spouted and dropped down onto the metallic mold. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shell mold molding machine used when molding various molds for shell molds, for example.

  Conventionally, as a molding machine for this type of shell mold, a mold box having a mold and a mold heating mechanism, a sand supply device capable of storing foundry sand using a thermosetting resin as a sintering agent, and a sand supply device Opening container-shaped dump box capable of receiving casting sand from the mold, mold heating device for heating the mold, and opening located above the mesh body provided in the opening of the dump box can be opened and closed The shutter mechanism consisting of multiple slat plates and the mold box and the dump box are reversed with the mold box and the dump box closed, and the opening of the dump box is opened while the rotation is stopped. The thing of the structure which consists of a rotation mechanism made to fall naturally on a type | mold is known.

JP 2000-24758 A

  However, in the case of the above-described conventional structure, a plurality of slat plates are rotated by the shutter mechanism to open the opening of the dump box, and through the slat gap and the net-like body facing the foundry sand from the sand supply device in the dump box. After supplying the sand, the slat plate is rotated to close the opening of the dump box, and the mold box and the dump box are turned over in a closed state so that the dump box is in the upper position. Open the opening of the dump box with the rotation stopped, let the foundry sand in the dump box drop naturally onto the heated mold, drop the foundry sand onto the mold, and then return the dump box to its original position. The mold is then heated from above the mold of the mold box with a heating device, and the foundry sand is cured using a thermosetting resin as a sintering agent to produce one of a pair of molds. At this time, when the foundry sand is supplied into the dump box, the dredged sand of the foundry sand adheres to the slats, and the dredged sand is stopped on one side by the rotation of the dump box. When the dump box is inverted and the foundry sand is naturally dropped onto the mold, this dredged sand first falls onto the mold, and then the foundry sand in the dump box falls onto it, There is a disadvantage that the surface which is the inner surface of the casting sand mold may be roughened due to the presence of dredged sand or the finishing accuracy may be reduced.

  The present invention aims to solve these disadvantages. Among the present inventions, the invention described in claim 1 includes a mold box having a mold and a mold heating mechanism, and a thermosetting resin. Sand supply device capable of storing foundry sand as a sintering agent, open container-shaped dump box capable of receiving foundry sand from the sand supply device, mold heating device for heating the mold, and the mold A rotating mechanism that reverses the mold box and the dump box in a closed state covering each other, and discharges and drops the foundry sand in the dump box onto the mold during the rotation. And a control member for discharging and dropping the foundry sand from the dump box onto the mold as uniformly as possible.

  The invention according to claim 2 is characterized in that the control member comprises a partition plate for partitioning the inside of the dump box in the front-rear direction of rotation, and the invention according to claim 3 is characterized in that The partition plate is formed obliquely in an oblique direction in which the foundry sand in the dump box is discharged and dropped onto the mold.

  As described above, according to the present invention, the mold is heated by the mold heating mechanism, and the sand is supplied into the dump box by the sand supply device. The dump box is reversed when closed, and the casting sand in the dump box is discharged and dropped onto the mold through the opening before the dump box reaches the upper position, and the mold box and the dump box. Are opened to each other, the molding sand on the mold is heated by the mold heating device, and the molding sand is cured by using the thermosetting resin as a sintering agent by heating from the mold and the upper side, In this case, a control member for discharging and dropping the foundry sand from the dump box as uniformly as possible onto the mold is provided in the dump box. Therefore, it is not necessary to arrange a shutter mechanism composed of, for example, a plurality of slats at the opening of the dump box, and the casting in the dump box is formed on the die after the dredged sand has first dropped on the mold. This prevents sand from falling, so that the surface that becomes the inner surface of the mold can be prevented from being roughened by the presence of dredged sand, and the finishing accuracy can be prevented from falling. Therefore, it is possible to improve the moldability and simplify the structure.

  In the invention according to claim 2, since the control member comprises a partition plate for partitioning the inside of the dump box in the front-rear direction of rotation, the foundry sand in the dump box can be divided. Can be released and dropped as uniformly as possible on the mold, and in the invention according to claim 3, the partition plate releases and drops the foundry sand in the dump box onto the mold. Since it is obliquely installed, the casting sand in the dump box can be released and dropped onto the mold by centrifugal force and can be released and dropped as uniformly as possible on the mold. .

  FIGS. 1 to 13 show an embodiment of the present invention. Reference numeral 1 denotes a mold box, and a holding member 3 capable of detachably holding a mold 2 at an upper portion and a mold 3 at a lower portion are heated from below. A mold heating mechanism 4 comprising a possible gas burner is provided.

  Reference numeral 5 denotes a sand supply device, which is formed in a hopper shape, is provided with a shutter 6 at a lower portion, and contains foundry sand using a thermosetting resin as a sintering agent.

  Reference numeral 7 denotes a dump box, which is formed in an open container shape capable of receiving the foundry sand W by the opening operation of the shutter 6 of the sand supply device 5, and the mesh body 8 is provided in the upper opening N.

  Reference numeral 9 denotes a mold heating device which is positioned opposite to the mold 3 of the mold box 1 and is configured to heat the mold from above by a burner 9a.

  Reference numeral 10 denotes a rotation mechanism. In this case, a rotation shaft 11 is provided horizontally on the mold box 1, the mold box 1 and the dump box 7 are pivotally connected by a pivot 12, and the rotation shaft 11 is connected to the mold box 1. The dump box 7 is rotated by a drive mechanism (not shown), and the dump box 7 is guided by the guide rolls 13 and the guide rails 14, thereby rotating the trough so that the dump box 7 is wound around the mold box 1. The dump box 7 is reversed in a closed state, and the casting sand W in the dump box 7 is discharged and dropped onto the mold 3 by centrifugal force in the middle of the rotation. The dump box 7 is returned and guided by the guide rolls 13 and the guide rails 14, so that the dump box 7 is reversely rotated so as to unwind the dump box 7 wound around the mold box 1. , And the mold boxes 1 and dump box 7 is configured so as to return to the original state in parallel position.

  A control member 15 is provided in the dump box 7, and in this case, is formed by a partition plate 16 for partitioning the inside of the dump box 7 into two storage portions 7 a and 7 b in the front-rear direction of rotation. In this case, the partition plate 16 is obliquely installed in an oblique direction with an installation angle θ corresponding to the discharge angle at which the foundry sand W in the dump box 7 is discharged and dropped onto the mold 3. The number of partition plates 16 and the installation angle θ are appropriately selected depending on the amount of foundry sand W, the rotational speed of the dump box 7, and the like.

  Since this embodiment is configured as described above, referring to FIGS. 1 to 13, first, as shown in FIGS. 1 and 2, the mold 2 is heated by the mold heating mechanism 4 and the shutter 6 of the sand supply device 5. As a result of the opening operation, the foundry sand W is supplied into the dump box through the mesh body 8, and the foundry sand W falls into the two storage portions 7a and 7b partitioned by the partition plate 16 as the control member 15, respectively. 3, the rotation shaft 11 of the rotation mechanism 10 starts to rotate clockwise in the drawing after the sand is supplied, and the mold box 1 rotates and is connected by the pivot 12 as shown in FIGS. 4 and 5. The dump box is also rotated in the towed state, and the mold box 1 and the dump box 7 are closed with each other as shown in FIG. 6, and the mold box 1 and the dump box are further closed as shown in FIGS. 7 reverses in the closed state of covering each other The casting sand W in the dump box 7 is discharged and dropped onto the mold 3 by centrifugal force from before the dump box reaches the upper position. Next, as shown in FIG. The dump box connected by the pivot 12 also rotates in the reverse direction while being reversely rotated. As shown in FIGS. 10 and 11, the mold box 1 and the dump box 7 are opened to each other, as shown in FIG. The mold heating device 9 is transferred to the upper position of the mold 3, the foundry sand W on the mold 2 is heated by the mold heating device 9, and the foundry sand is thermosetting by heating from the mold and above. The resin is cured as a sintering agent, and one mold K of the pair of molds is formed as shown in FIG.

  At this time, the dump box 7 is provided with a control member 15 for discharging and dropping the foundry sand W from the dump box 7 on the mold 2 as uniformly as possible. For example, it is not necessary to arrange a shutter mechanism composed of a plurality of slats at the part, and the cast sand in the dump box falls after the dredged sand has first dropped on the mold due to the presence of the shutter mechanism. For this reason, the inner surface of the mold K can be roughened by the presence of dredged sand and the finish accuracy can be prevented from being lowered, and the dump box 7 can be smoothly rotated forward and backward. In addition, it is possible to improve the moldability and simplify the structure.

  In this case, the control member 15 includes a partition plate 16 for partitioning the dump box 7 in the front-rear direction of rotation. Therefore, the foundry sand W in the dump box 7 can be divided, and the foundry sand W is In this case, the partition plate 16 is inclined in an oblique direction in which the casting sand W in the dump box 7 is discharged and dropped onto the mold 2 as much as possible. Therefore, the foundry sand W in the dump box 7 can be discharged and dropped on the mold 3 by centrifugal force, and can be discharged and dropped on the mold 2 as uniformly as possible.

  The present invention is not limited to the above embodiment, and the number and installation angles of the mold box 1, the mold heating mechanism 4, the dump box 7, the mold heating device 9, the control member 15, and the partition plate 16. θ is designed by changing as appropriate.

  As described above, the intended purpose can be sufficiently achieved.

1 is an overall perspective view of an embodiment of the present invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. 1 is an overall perspective view of an embodiment of the present invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention. It is a description sectional side view of the embodiment of this invention.

Explanation of symbols

W Foundry sand N Opening K Mold 1 Mold box 2 Mold 4 Mold heating mechanism 5 Sand supply device 7 Dump box 9 Mold heating device burner 10 Rotating mechanism 15 Control member

Claims (3)

  A mold box having a mold and a mold heating mechanism, a sand supply device that can store foundry sand using a thermosetting resin as a sintering agent, and an open container shape that can receive the foundry sand from the sand supply device The dump box, a mold heating device for heating the mold, and the mold box and the dump box are reversed in a closed state, and the foundry sand in the dump box is removed during the rotation. A control mechanism for discharging and dropping the foundry sand from the dump box as uniformly as possible onto the mold. A molding machine for shell molds.   2. The shell mold molding machine according to claim 1, wherein the control member comprises a partition plate for partitioning the dump box in the front-rear direction of rotation. 3. The shell mold molding machine according to claim 2, wherein the partition plate is obliquely arranged in an oblique direction in which the foundry sand in the dump box is discharged and dropped onto the mold.

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