JP7138527B2 - Downward discharge nozzle used for layering construction materials - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a downward ejection nozzle used for layering construction materials, and more particularly to a nozzle for ejecting construction materials when creating a construction structure with a 3D printer.

In recent years, 3D printers have been put to practical use, and are expected to be widely used as modeling technology in various fields such as construction, medicine, and design. A typical 3D printer ejects a fluid material (for example, mortar, resin, etc.) from a nozzle, and controls the ejection amount and ejection position of the material based on design data to form a desired shape. It is designed to create Conventionally, various technologies related to 3D printers have been disclosed (see Patent Document 1, for example).

The technology described in Patent Literature 1 relates to a construction device for construction structures using 3D printer technology characterized by a nozzle shape. In this technique, the nozzle attached to the tip side of the delivery path of the material has an internal hollow shape from the delivery side of the material toward the delivery side so that the cross section of the material to be delivered has a desired shape at the ejection port of the material. It is formed in a state of gradual change.

JP 2018-86747 A

As described above, 3D printers have been put into practical use in various fields, and various modifications have been made to the shape and structure of nozzles in order to create a modeled object with a desired shape. For example, in the technique described in Patent Document 1, a plurality of nozzles are produced according to the shape of the construction structure to be constructed, and the nozzles are replaced according to the progress of the work, thereby constructing construction structures of various shapes. Although it has the advantage that it can be constructed easily, there is still room for further improvement in order to create a molded object with a free cross-sectional shape.

In the case of a nozzle that can discharge material only in a fixed direction, a rotating mechanism for the nozzle is required, which complicates the structure of the construction apparatus. In this respect, in the case of a nozzle that has a circular cross-sectional shape of the discharge port and discharges the material downward, the pressure loss of the material is small, and even if there is no nozzle rotation mechanism, curved surfaces and corners can be freely formed. Although it is possible to form a shape, the cross-sectional shape of the ejected material is close to an ellipse, and the material may only contact with a line between each layer.

Further, in the case of a nozzle having a square cross-sectional shape of the discharge port, not only is the structure twisted at curved surfaces and corners, but there are cases where the material between layers contacts only in a line. In this way, when a conventional nozzle is used for modeling, it is not possible to stack multiple layers high or increase the height of one layer because of the lack of stability of the modeled object. I had a problem with fragility.

The present invention has been proposed in view of the above-mentioned circumstances, and employs a downward nozzle that causes less pressure loss of the material, and is used for laminating construction materials that can form curves even without a nozzle rotation mechanism. It is an object of the present invention to provide a directional discharge nozzle.

In order to achieve the above objects, the downward discharge nozzle used for layering construction materials according to the present invention has the following features. That is, the downward ejection nozzle used for layering construction materials according to the present invention relates to a nozzle for ejecting construction materials when constructing a construction structure with a 3D printer. The downward discharge type nozzle used for stacking construction materials has a soldering iron part extending outward from the outer periphery of the discharge port at the lower end of a nozzle body for discharging materials downward .

The ejection port is formed so as to eject the material substantially vertically downward. Further, the soldering iron portion has a planar lower surface, and the diameter of the entire side surface is tapered downward.

According to the downward discharge nozzle used for stacking construction materials according to the present invention, since the discharge port of the nozzle body faces downward, the pressure loss of the material is small, and the nozzle body does not have a rotating mechanism. Also, it is possible to form a bent portion composed of a curved portion, a corner portion, and the like.

In addition, since it has a soldering iron, even if the dispensed material swells or twists, the soldering iron can even out the top surface of the material. become a thing. As a result, the contact area of the materials between the layers increases, and the stability of the model can be increased. Furthermore, since the discharged material can be densely laminated, the structural strength can be increased, and it is possible to stack a plurality of layers high or increase the height of one layer.

FIG. 1 is a perspective view of a downward discharge nozzle used for layering construction materials according to an embodiment of the present invention, as seen obliquely from above. 1 is a perspective view of a downward discharge nozzle used for layering construction materials according to an embodiment of the present invention, as viewed obliquely from below; FIG. The perspective view which shows the other example of an iron part.

Hereinafter, a downward discharge nozzle (hereinafter referred to as a downward discharge nozzle) used for layering construction materials according to an embodiment of the present invention will be described with reference to the drawings. 1 to 3 illustrate a downward discharge nozzle according to an embodiment of the present invention. FIG. 1 is a perspective view of the nozzle viewed from above, and FIG. 2 is a perspective view of the nozzle viewed from below. 3 is a perspective view showing another example of the iron portion.

<Overview of downward ejection type nozzle>
The downward discharge nozzle according to the embodiment of the present invention includes a soldering iron part 30 extending outward from the outer periphery of the discharge port 20 at the lower end of the nozzle body 10 for discharging material downward. It is characterized by That is, a flange-shaped soldering iron portion 30 is provided around the discharge port 20 at the lower end portion of the nozzle body 10 .

<Soldering iron part>
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 soldering iron part 30 has a certain thickness, and the lower surface thereof is flat in order to level the upper surface of the material. Also, the length of protrusion (extension in the lateral direction) from the nozzle body 10 can be appropriately set according to the size (diameter) of the ejection port 20, the material used, and the like.

<Shape of iron part>
The shape of the soldering iron part 30 may be any shape. For example, as shown in FIGS. It can have a columnar shape (FIG. 3(b)) or an inverted truncated cone shape (FIG. 3(c)). Since the diameter of the inverted truncated cone-shaped soldering iron portion 30 shown in FIG. In this way, by decreasing the diameter of the iron part 30 downward, even if the side surface of the iron part 30 comes into contact with the discharged material, the side surface is inclined, so that the material can be leveled smoothly. can.

<Discharge port>
The ejection port 20 of this embodiment opens downward at the lower end of the nozzle body 10 . Moreover, although the cross-sectional shape of the discharge port 20 shown in FIG. 2 is circular, it may be elliptical, square, polygonal, or the like, depending on the material used and the aspect of the construction structure.

<Attached equipment and materials>
The nozzle body 10 is supported so as to be movable in a desired direction (three-dimensional direction) by a moving device with the discharge port 20 facing downward. A material supply device (a device including a material reservoir, a pressure feed pump, etc.) 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 construction structure, and may be, for example, a cement-based material or a dendrite-based material.

<Construction structure>
The construction structure constructed using the downward discharge nozzle according to this embodiment may be of any shape, for example, a wall, a solid or hollow column, a square/conical/cylindrical shape, etc. Buildings such as buildings, complex constructions of these can be constructed.

10 Nozzle body 20 Discharge port 30 Iron part

Claims (1)

A nozzle for ejecting construction material when building a construction structure with a 3D printer,
The lower end of the nozzle body for discharging the material downward is provided with a soldering iron part extending outward from the outer periphery of the discharge port,
The ejection port is formed to eject the material substantially vertically downward,
The soldering iron portion has a planar lower surface and a diameter that decreases downward along the entire circumference of the side surface.
A downward discharge nozzle used for laminating construction materials, characterized in that:

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