JP6631654B2 - Core molding equipment - Google Patents

Description

  The present invention relates to a core molding apparatus.

  Conventionally, as a technique in such a field, there is JP-A-2006-195990. In the kneading device described in this publication, the kneading material is kneaded, and then the kneading material is filled into the mold by injecting the kneading material into the mold. In this kneading apparatus, the kneading material is filled in the mold by injecting the kneading material while the apparatus is turned sideways.

JP-A-2006-195990

However, in the above-described kneading apparatus, since the kneading apparatus is injected in a state where the kneading apparatus is turned sideways, when the kneading material is burnt and solidified in the middle of the mold, there is a problem that it is difficult to fill the kneading material to the inner corner of the mold. There is.
The present invention provides a core molding apparatus that injects a kneading material into a mold in a state where the kneading material easily fills a deep corner of the mold.

The core molding apparatus according to the present invention has a kneading section for kneading the kneading material in the cylindrical section in a state where the cylindrical section extends in the lateral direction and a piston for injecting the kneading material in the extending direction of the cylindrical section. A rotating unit that vertically raises the kneading unit when filling the kneading material into the mold from the kneading unit.
Thereby, when injecting the kneading material into the mold, the injection can be performed using both the firing force of the piston and the gravity.

  As a result, the kneading material can be easily filled into the inner corner of the mold.

It is a device sectional view in the state where a kneading part was turned down. It is a device sectional view in the state where a kneading part was raised upright. FIG. 4 is a cross-sectional view of the apparatus in a state where a kneading unit is vertically raised and an injection operation is performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a core molding apparatus 1 includes a kneading unit 11 for kneading a kneading material, a piston 12 provided in the kneading unit 11 and injecting the kneading material from the kneading unit 11, and turning the kneading unit 11 sideways. And a rotating unit 13 vertically raised from the state of FIG. Note that, for example, the kneading material is a core sand for casting, but is not limited to this.

  The kneading unit 11 includes a substantially cylindrical tube portion 21 having a hollow portion 21a into which a kneading material is filled, and a plurality of rotating pins 22 arranged to extend substantially parallel to the central axis of the tube portion 21. A rotation base 23 connected to the rotation pin 22 to rotate the rotation pin 22 in the cylinder 21; a rotation base 23; a wing 24 arranged between a piston plate 31 of the piston 12 described later; An injection portion 25 is provided at one bottom of the injection portion 21 and faces the mold at the time of injection.

  In addition, the state where the kneading unit 11 is turned sideways, that is, the state where the cylindrical portion 21 extends in the lateral direction. Here, the direction extending from one bottom of the cylindrical portion 21 to the other bottom is defined as an X direction. The extending direction of the cylindrical portion 21 when the kneading portion 11 is vertically raised is defined as a Z direction. Hereinafter, a description will be given with reference to FIG. 1 assuming that the kneading unit 11 is in a state of being laid down.

  The piston 12 has a piston plate portion 31 having substantially the same diameter as the inner diameter of the cylindrical portion 21, and a piston rod 32 having an end connected to the surface of the piston plate portion 31. Here, the piston rod 32 connected to the piston plate portion 31 extends toward the end where the injection portion 25 is not formed.

  In addition, the piston plate part 31 is arrange | positioned so that it may not contact | abut the surface of the internal diameter of the cylinder part 21, with a clearance gap.

  The cylindrical portion 21 is arranged to extend in the X direction when kneading the kneading material. The kneading material is filled in the hollow portion 21a formed by the cylindrical portion 21. In addition, for example, the wall portion forming the inner diameter forming the hollow portion 21a has a circular YZ section. A hole or the like may be formed in a part of the wall forming the cylindrical portion 21 so that the kneading material can be inserted.

  The plurality of rotating pins 22 operate in a hollow portion 21a formed by the cylindrical portion 21. For example, each of the plurality of rotation pins 22 is connected to a rotation base 23, and operates in the hollow portion 21a by the rotation of the rotation base 23. For example, the kneading material in the hollow portion 21a is wound up by the rotation pin 22 operating along the circumferential direction of the cylindrical portion 21 in the hollow portion 21a, and thereafter, the kneading material is gravitationally moved in the hollow portion 21a. The kneading proceeds by falling.

  The plurality of rotating pins 22 are provided so as to penetrate the piston plate portion 31, and are slidable with respect to the through holes.

  The rotation base 23 is a disk provided in the cylindrical portion 21, and is connected to the rotation pin 22. Typically, the rotation center axis of the rotation base 23 is disposed so as to be substantially the same as the center axis of the cylindrical portion 21 extending in the X direction. The piston plate 31 is disposed between the rotary base 23 and the injection unit 25. That is, the piston rod 32 penetrates the center of the plate surface of the rotation base 23. Further, a plurality of through holes are provided in the plate surface of the rotation base 23, and each of the rotation pins 22 penetrates. Here, the rotating pin 22 is slidable with respect to the through hole.

  The wing portion 24 is arranged between the rotation base 23 and the piston plate portion 31. For example, a plurality of wing portions 24 are respectively arranged between the rotation base 23 and the piston plate portion 31 so that the ends are connected to the piston rod 32, and the wing portions are arranged with the piston rod 32 as the center axis of rotation. 24 rotates. Accordingly, when the wing portion 24 rotates, the kneading material flows from the vicinity of the piston rod 32 toward the wall portion forming the cylindrical portion 21 due to centrifugal force.

  The injection unit 25 is disposed below the kneading unit 11 and above the mold when the rotating unit 13 is operated and the kneading unit 11 is vertically raised. Further, the injection unit 25 injects the kneaded material into the mold by operating the piston 12 in the direction of the injection unit 25 in a state where the kneading unit 11 is vertically raised. For example, the injection unit 25 is in a closed state when kneading is performed and a state in which the kneaded material does not leak from the hollow portion 21a, and is in an open state and is in a state where injection is possible when performing injection.

  The rotating unit 13 is arranged in the kneading unit 11 so as to contact the outer periphery near the bottom where the injection unit 25 is formed. For example, a pair of rotating parts 13 are arranged so as to sandwich the cylindrical part 21 of the kneading part 11. As shown in FIG. 2, by the operation of the pair of rotating parts 13, a force is generated on the cylindrical part 21, and the kneading part 11 can be raised vertically from a sideways state. Note that a servomotor, a speed reducer, or the like can be used for the rotating unit 13, but is not limited thereto.

  Next, kneading and injection operations using the core molding apparatus 1 will be described. First, the kneading operation will be described.

  As shown in FIG. 1, when performing the kneading operation, the kneading unit 11 is in a state of lying down. The kneading material is filled in the hollow portion 21a of the cylindrical portion 21. At this time, the rotation base 23 and the piston plate portion 31 are arranged so as to be largely separated from the injection portion 25, and the hollow portion 21a is arranged so as to be wide.

  Thereafter, the rotation base 23 rotates. Thereby, the rotating pin 22 operates in the hollow portion 21a, and the kneading of the kneading material proceeds.

  Next, the operation at the time of injecting the kneading material in the core molding apparatus 1 will be described.

  The rotating unit 13 is operated. Thereby, as shown in FIG. 2, the kneading unit 11 is in a vertically raised state with the bottom of the injection unit 25 side being the lower side in the Z direction. Further, at this time, the injection unit 25 is in a state of facing the mold disposed below.

  Next, the wing portion 24 is driven to rotate. The rotational drive of the wing portion 24 is executed by applying a rotational force to the piston rod 32, for example. By rotating the wing portion 24, the kneading material that has entered between the rotation base 23 and the piston plate portion 31 flows toward the wall forming the inner diameter of the cylindrical portion 21.

  Here, since the kneading portion 11 is in a vertically raised state, the kneading material flowing in the wall direction forming the inner diameter of the cylindrical portion 21 is located between the wall having the inner diameter of the cylindrical portion 21 and the piston plate portion 31. It passes through the gap and falls to the lower hollow portion 21a side by gravity.

  The injection unit 25 is opened, and the piston 12 is lowered as shown in FIG. Thereby, the kneading material filled in the hollow part 21a is injected from the injection part 25 toward the mold.

  At this time, the kneading material injected into the mold from the injection unit 25 is filled into the mold using gravity. Therefore, the mold is filled with the kneading material by using both the firing force of the piston 12 and the force of gravity, so that the kneading material is not burnt and solidified in the middle of the mold, and reaches the inner corner of the mold. The kneading material is easily filled.

  This makes it possible to provide a core molding apparatus capable of sufficiently filling the kneading material into the mold. Further, even when the kneading material enters between the rotating base and the piston plate portion during the kneading, the kneading material is scraped out by the wings, and the kneading material is inserted into the hollow portion so that the mold can be filled. Can be returned, and the kneading material can be used with high efficiency.

  The present invention is not limited to the above embodiment, and can be appropriately changed without departing from the gist.

DESCRIPTION OF SYMBOLS 1 Core molding apparatus 11 Kneading part 12 Piston 13 Rotating part 21 Cylindrical part 21a Hollow part 22 Rotating pin 23 Rotating base 24 Wing part 25 Injection part 31 Piston plate part 32 Piston rod

Claims (5)

A kneading unit having a cylindrical portion, and kneading the kneading material in the cylindrical portion,
A piston that is housed in the cylindrical portion and that injects the kneading material in an extending direction of the cylindrical portion ,
A rotating unit that sets the cylindrical portion to a vertically raised state from a horizontal state,
A control unit that controls the operation of the core molding apparatus,
The control unit includes:
The kneading unit is controlled so that the kneading material is kneaded in a state where the cylindrical portion is lying down ,
In a state where the cylindrical portion is vertically raised, the kneading material is injected downward from the cylindrical portion, and the piston is controlled so as to fill the mold with the kneading material,
Core molding equipment. At one end of the cylindrical portion, an injection unit for injecting the kneading material is provided to be openable and closable,
The control unit includes:
When the kneading material is kneaded, the injection unit is closed, and when the mold is filled with the kneading material, the injection unit is opened.
The core molding apparatus according to claim 1. The kneading unit,
A rotating pin for kneading the kneading material,
A rotation base for rotating the rotation pin,
A wing portion rotatably disposed between the rotation base and the piston, provided in the cylindrical portion,
The core molding apparatus according to claim 1. The control unit includes:
After the kneading portion is in a vertically raised state, before filling the kneading material in the mold, the wing portion is rotated,
The core molding apparatus according to claim 3. A hole for charging the kneading material is provided on a wall surface of the cylindrical portion,
The core molding apparatus according to claim 1.

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