JP2020049457A - Downward direction discharge type nozzle used in lamination of construction material - Google Patents

Abstract

To prevent a material from flowing and falling down from a discharge port of a nozzle even in a case that a material having high fluidity is used.SOLUTION: A nozzle is used to discharge a construction material when a construction structure is built by a 3D printer, and a trap mechanism (a bending part) 40 of a material to be delivered is provided in the middle of a material delivery path of a nozzle body 10 which discharges the material in a downward direction. The trap mechanism 40 is formed by a bending part formed by bending the material delivery path of the nozzle body 10. A lower end part of the nozzle body 10 includes an iron part 30 which is provided extending outward from an outer periphery of a discharge port 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a downward discharge type nozzle used for laminating construction materials, and more particularly, to a nozzle for discharging a construction material when creating a construction structure with a 3D printer.

  In recent years, 3D printers have been put into practical use, and are expected to be widely used as modeling technologies in various fields such as construction, medical care, and design. A typical 3D printer discharges a material having fluidity (for example, mortar or resin) from a nozzle, and controls a discharge amount and a discharge position of the material based on design data, thereby forming a shaped object having a desired shape. To be created. Conventionally, various technologies relating to a 3D printer have been disclosed (for example, see Patent Document 1).

  The technique described in Patent Literature 1 relates to a construction apparatus for a construction structure using a 3D printer technique having a characteristic nozzle shape. In this technique, the nozzle attached to the tip end of the material delivery path has a hollow shape from the material delivery side toward the discharge side so that the cross section of the material to be delivered has a desired shape at the material discharge port. It is formed in a state that is gradually changed.

JP 2018-86747 A

  As described above, 3D printers have been put to practical use in various fields, and various ideas have been devised on the shape and structure of the nozzle in order to create a shaped article having a desired shape. For example, in the technique described in Patent Literature 1, a plurality of nozzles are manufactured according to the shape of a construction structure to be built, and the nozzles are replaced according to the progress of work, whereby construction structures having various shapes are manufactured. Although there is an advantage that it can be easily constructed, there is room for further contrivance in order to create a shaped article having a free cross-sectional shape.

  For example, when a material having a high fluidity is used, the material may drop from the discharge port of the nozzle. If a mechanism is provided to prevent the material from dripping from the discharge port, such as opening and closing the discharge port using a spring or complicating the internal shape of the nozzle, the nozzle structure As the complexity increases, the manufacturing cost increases. Further, when such a mechanism is provided, the mechanism may not function properly, for example, the material may be clogged in the material delivery path. Further, it is difficult to wash away the material remaining in the material delivery path, and maintenance work is troublesome.

  The present invention has been proposed in view of the circumstances described above, and even when a material having a high fluidity is used, it is used for laminating a construction material capable of preventing the material from dripping from a discharge port of a nozzle. It is an object of the present invention to provide a directional discharge nozzle.

  The downward discharge nozzle used for laminating construction materials according to the present invention has the following features in order to achieve the above-described object. That is, the downward discharge type nozzle used for laminating the construction material according to the present invention relates to a nozzle for discharging the construction material when constructing a construction structure with a 3D printer. The downward discharge type nozzle used for laminating the construction material is characterized in that a trapping mechanism for the material to be delivered is provided in the middle of the material delivery path of the nozzle body that discharges the material in the downward direction.

  Further, the trap mechanism can be formed by a bent portion obtained by bending the material delivery path of the nozzle body. Further, it is possible to equip the lower end portion of the nozzle body with an iron portion provided to extend outward from the outer periphery of the discharge port.

  According to the downward discharge type nozzle used for laminating the construction material according to the present invention, a material having a high fluidity is used because it has a trapping mechanism for the material to be delivered in the middle of the material delivery path of the nozzle body. Even in this case, the flow rate of the material is adjusted by the trap mechanism, so that the material does not drop from the discharge port. Further, since the trap mechanism has a simple structure in which the material delivery path is bent, the manufacturing cost can be reduced, and clogging of the material can be prevented.

  Further, since the iron has the iron part, even when the ejected material is raised or twisted, the upper surface of the material can be leveled by the iron part, so that the upper surface of the modeled object is uniform and flat. It will be. For this reason, the area where the material comes into contact between the respective layers increases, and the stability of the modeled object can be increased. Further, since the discharged materials can be densely laminated, the structural strength can be increased, and it is possible to stack a plurality of layers high or to increase the height.

The perspective view of the state where the downward discharge type nozzle used for lamination of the construction material concerning the embodiment of the present invention was seen from diagonally above. The perspective view of the state where the downward discharge type nozzle used for lamination of the construction material concerning the embodiment of the present invention was seen from diagonally below. FIG. 9 is a perspective view showing another example of the trap mechanism. FIG. 9 is a perspective view showing another example of the trap mechanism.

  Hereinafter, a downward discharge nozzle (hereinafter, referred to as a downward discharge nozzle) used for laminating construction materials according to an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 4 illustrate a downward discharge type nozzle according to an embodiment of the present invention. FIGS. 1 and 2 are perspective views of a nozzle having an iron portion, and FIGS. It is a perspective view showing an example.

<Outline of downward discharge type nozzle>
As shown in FIG. 1 to FIG. 4, the downward discharge type nozzle according to the embodiment of the present invention includes a trapping mechanism 40 for the material to be discharged in the middle of the material discharge path of the nozzle body 10 for discharging the material in the downward direction. The feature is that it is provided. The trap mechanism 40 is a mechanism for suppressing the flow of the material to be sent out in the material sending path of the nozzle body 10 and preventing the material from leaking from the discharge port 20 even if the material has high fluidity. It is.

<Trap mechanism>
The trap mechanism 40 is formed by bending the material delivery path of the nozzle body 10 to provide a bent portion. The shape of the bent portion is substantially U-shaped (FIG. 1) or substantially S-shaped in a vertical section, and may be curved in an arc shape (FIG. 3), or may be bent to have a corner. (FIG. 4). The number of times of bending, the curvature (in the case of bending with corners, the bending angle), and the length of the bent portion can be appropriately set according to the fluidity of the material to be sent out. May be bent only or may be bent a plurality of times.

  The material to be delivered through the material delivery path of the nozzle body 10 is changed from a substantially vertically downward direction to an obliquely downward direction in the trap mechanism (bent portion) 40, thereby preventing the material from leaking from the discharge port 20. be able to. That is, when the material is caused to flow straight down in a substantially vertical direction and is discharged from the discharge port 20, the material flows down due to its own weight and leaks out from the discharge port 20 even when the material is stopped being sent. . In contrast to such an embodiment, when the trap mechanism 40 is provided, when the supply of the material is stopped, the material is temporarily stored in the bent portion, so that the material does not leak from the discharge port 20. Absent.

<Iron section>
As shown in FIGS. 1 and 2, the lower end of the nozzle body 10 is provided with an iron portion 30 extending outward from the outer periphery of the discharge port 20. That is, the lower end of the nozzle body 10 is provided with a flange-shaped iron portion 30 around the discharge port 20.

  The iron part 30 is a part for pressing against the upper surface of the material discharged from the discharge port 20 to level the upper surface of the material. The iron part 30 has a certain thickness, and the lower surface is flat to level the upper surface of the material. Further, the length of projection from the nozzle body 10 (spread in the lateral direction) can be appropriately set according to the size (diameter) of the discharge port 20, the material used, and the like.

<Shape of iron part>
Although the shape of the iron part 30 may be any shape, for example, it can be cylindrical, polygonal, quadrangular, or inverted truncated cone. Since the diameter of the inverted truncated cone-shaped iron portion 30 is reduced downward, the side surface is an inclined surface. In this way, by reducing the diameter of the iron portion 30 downward, even if the side surface of the iron portion 30 comes into contact with the discharged material, the material is smoothly leveled because the side surface is inclined. it can.

<Discharge port>
The discharge port 20 of the present embodiment opens downward at the lower end of the nozzle body 10. Further, the cross-sectional shape of the discharge port 20 shown in FIG. 2 is circular, but may be elliptical, quadrangular, polygonal, or the like, depending on the material used and the form of the construction structure.

<Attached equipment and materials>
The nozzle body 10 is supported movably in a desired direction (three-dimensional direction) by a moving device with the discharge port 20 facing downward. Further, a material supply device (a device including a material storage unit, a pressure feed pump, and the like) is connected to the nozzle body 10 via a pressure feed pipe. The material discharged from the nozzle body 10 is appropriately selected according to the mode of the construction structure, but may be, for example, a cement material or a tree material.

<Construction structure>
The construction structure constructed using the downward discharge type nozzle according to the present embodiment may be of any shape, for example, a wall, a solid or hollow column, a square, a cone, and a cylinder. Buildings, such as shapes, and composite structures thereof can be constructed.

DESCRIPTION OF SYMBOLS 10 Nozzle main body 20 Discharge port 30 Iron part 40 Trap mechanism (bent part)

Claims (3)

A nozzle for discharging a construction material when constructing a construction structure with a 3D printer,
A downward discharge nozzle used for laminating construction materials, wherein a trapping mechanism for the discharged material is provided in the middle of a material delivery path of a nozzle body that discharges a material in a downward direction.   2. The downward discharge nozzle according to claim 1, wherein the trap mechanism includes a bent portion obtained by bending a material delivery path of the nozzle body. 3.   The downward discharge type used for laminating construction materials according to claim 1 or 2, further comprising a iron portion provided at a lower end portion of the nozzle body so as to extend outward from an outer periphery of the discharge port. nozzle.

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