JP2023026076A - Method, system and program for casting - Google Patents

Abstract

To reduce the cost of manufacturing in small quantity a metallic stereoscopic object of aluminum or the like in casting.SOLUTION: A method for casting includes: a molding-model data preparing step that prepares two-dimensional layer data D31, D31 for each layer by generating three-dimensional data D2 in which a photographic subject is three-dimensionalized based on a two-dimensional data group D1 that is a two-dimensional image or motion picture, and dividing the three-dimensional data D2 into a plurality of layers; a resin pattern making step that makes a resin pattern 3 by laying respective actual ones of two-dimensional sectional layers one over another based on each of layer data while forming them with resin; a molding step that forms a sand mold 5 by embedding the resin pattern 3 into a foundry sand; and a pouring step that injects molten metal from a blow port 42 arranged in at least one point of an outer surface of the sand mold 5 and brings the molten metal into contact with the resin pattern, substantially dissipates the resin pattern 3 by decomposing/vaporizing a resin making up the resin pattern 3 and fills as melt the injected molten metal injected in a cavity formed by a dissipation of the resin pattern 3.SELECTED DRAWING: Figure 1

Description

The present invention relates to a casting method, casting system, and casting program using metal such as aluminum.

Conventionally, there has been a demand to reproduce memorable objects such as pets as three-dimensional objects, and methods have been devised to create three-dimensional data of pets using gypsum materials, for example, as disclosed in Patent Document 1. . The technique disclosed in Patent Document 1 includes means for creating three-dimensional data desired by the user and means for modeling a three-dimensional object with gypsum material based on the created modeling model data.

Specifically, in the method disclosed in Patent Document 1, first, three-dimensional data is produced based on data on the shape and color of a three-dimensional object desired by the user, and this three-dimensional data is divided into a plurality of layers, Layer data is produced for each divided layer, powder of the gypsum material is extended based on the layer data of each layer to form a powder layer, and the layer data is printed on this powder layer. After that, the gypsum material powder printed with layer data is solidified to form each two-dimensional cross-sectional layer of the real thing, and the two-dimensional cross-sectional layers of each layer are combined to create a three-dimensional object with the shape and color desired by the user. To manufacture.

JP 2011-101661 A

However, some users want metal such as aluminum as a material for three-dimensional objects. There is a problem that it is not suitable for small-lot production because of its high production cost, and that it is difficult to apply it commercially.

Therefore, the present invention solves the above problems, and provides a casting method, a casting system, and a casting program that can reduce the production cost when producing a small amount of three-dimensional objects made of metal such as aluminum. With the goal.

In order to solve the above problems, the casting method of the present invention includes:
Based on a two-dimensional data group that is a two-dimensional image or moving image, three-dimensional data is generated by three-dimensionalizing a subject in the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers and layer-by-layer. A molding model data production process that produces two-dimensional layer data,
a resin model manufacturing process for manufacturing a resin model by molding and laminating two-dimensional cross-sectional layers of the actual object based on the layer data;
a molding step of embedding the resin model in molding sand to mold a sand mold;
Molten metal is injected from a blowing port arranged at least in one place on the outer surface of the sand mold, brought into contact with the resin model, and the resin constituting the resin model is decomposed and vaporized to substantially form the resin model. a pouring step of filling the cavity formed by the disappearance of the resin model with the injected molten metal as molten metal;
characterized by comprising

Further, the casting system of the present invention is
Based on a two-dimensional data group, three-dimensional data is generated by three-dimensionalizing the subject of the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers to generate two-dimensional layer data for each layer. With the molding model data production department to produce,
resin model manufacturing means for manufacturing a resin model by molding and laminating actual two-dimensional cross-sectional layers with resin based on each layer data;
and a sand mold calculation unit for calculating positioning in the sand mold when embedding the resin model in molding sand.

The casting method and casting system according to the present invention described above can be realized by executing the casting program of the present invention written in a predetermined language on a computer. That is, the program of the present invention is installed in an IC chip or memory device of a mobile terminal device, a smart phone, a wearable terminal, a mobile PC or other information processing terminal, a general-purpose computer such as a personal computer or a server computer, and executed on a CPU. Thus, a system having the functions described above can be constructed and the casting method can be carried out.

That is, in the casting program of the present invention, the computer is
Based on a two-dimensional data group, three-dimensional data is generated by three-dimensionalizing the subject of the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers to generate two-dimensional layer data for each layer. With the molding model data production department to produce,
Resin model manufacturing means for manufacturing a resin model by molding and laminating actual two-dimensional cross-sectional layers with resin based on each layer data;
It functions as a sand mold calculation unit that calculates the positioning in the sand mold when the resin model is embedded in the molding sand.

Such a casting program of the present invention can be distributed, for example, through a communication line, and can be recorded in a computer-readable recording medium as a package application that runs on a stand-alone computer. Can be transferred. Specifically, the recording medium can be a magnetic recording medium such as a flexible disk or a cassette tape, an optical disk such as a CD-ROM or a DVD-ROM, or various recording media such as a RAM card. Then, according to the computer-readable recording medium recording this program, it is possible to easily implement the above-described system and method using a general-purpose computer or a dedicated computer, and save, transport, and Easy to install.

In addition, when molding in each of the above inventions, it is preferable that a connection member for connecting the blow port and the resin model is embedded in the foundry sand together with the resin model.

According to the casting method, casting system, and casting program of the present invention, three-dimensional data is generated from a two-dimensional data group that is two-dimensional images or moving images, based on this, a resin model is created by a 3D printer, and this resin A casting product can be manufactured by embedding a model in a sand mold and pouring molten metal such as aluminum. Since the resin model can be molded using a 3D printer, it can be manufactured in small quantities at low cost, and since the resin can be eliminated by molten metal, the manufacturing cost can be reduced even when manufacturing a small quantity. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows the whole casting system structure which concerns on embodiment. It is a block diagram which shows the internal structure of the information processing terminal which concerns on embodiment. It is a flow figure showing the procedure of the casting method concerning an embodiment. It is a sequence diagram showing the operation of the casting system according to the embodiment. FIG. 4 is an explanatory diagram showing a molding model data production process according to the embodiment; FIG. 4 is an explanatory diagram showing a molding model data production process according to the embodiment; 1 is a perspective view showing the appearance of a resin model according to an embodiment; FIG. It is a perspective view which shows the external appearance of the formwork which concerns on embodiment. It is explanatory drawing which shows the molding molding process which concerns on embodiment. It is explanatory drawing which shows the demolding process which concerns on embodiment. 1 is a perspective view showing the appearance of a casting product according to an embodiment; FIG.

Embodiments of the casting method and casting system according to the present invention will be described in detail below with reference to the accompanying drawings. The embodiments shown below are examples of devices and the like for embodying the technical idea of this invention. It does not specify the layout, etc., to the following. The technical idea of this invention can be modified in various ways within the scope of claims.

(Overview of casting method)
An overview of the casting method according to the present embodiment will be described. FIG. 3 shows the procedure of the casting method. As shown in the figure, first, in the casting system according to the present embodiment, three-dimensional data and layer data necessary for manufacturing a resin model are produced using an information terminal device 1 such as a smartphone used by a user. Then, the molding model data production step (S01) is executed.

In the molding model data production process, based on a two-dimensional data group, which is a two-dimensional image or moving image, three-dimensional data is generated in which the object in the two-dimensional data group is three-dimensionalized. Here, an image, which is a two-dimensional data group, consists of a two-dimensional pixel group. For example, the positions (x, y) and the positions (x, y ) has color information (color tone, gradation, etc.). For example, color tones such as RGB determine the color of each pixel, and luminance of 256 gradations determines the brightness of each pixel. A pixel is, for example, the smallest unit that constitutes a screen on a display, and a pixel exists as a point having color information. A display can display an image by a set of pixels arranged vertically and horizontally on the screen.

By photographing an object with a camera, the resolution and the luminance and color tone of each pixel are acquired as two-dimensional image data. A moving image, which is a two-dimensional data group, is a collection of such images, and a large number of images are continuous as frames in time series and compressed by various codecs to form a file format. Attribute data is added to the two-dimensional data group, and data such as shooting magnification, shooting date and time, and shooting location can be held.

In this embodiment, such a two-dimensional data group is obtained by the information acquisition unit 141 acquiring still images and moving images captured by the camera 121, or acquiring still images and moving images captured by other devices in a file format. or Then, based on this two-dimensional data group, stereoscopic three-dimensional data representing the shape and color of the subject is generated using a method such as photogrammetry. In the photogrammetry method, for example, parallax information is analyzed from a two-dimensional image obtained by photographing a three-dimensional object from a plurality of observation points, dimensions and shapes are calculated, and the calculated three-dimensional shape is defined by polygons. 3D data is generated. Note that the camera 121 may have a function as a 3D scanner, and the 3D scanner function may be used to read the shape and color of a three-dimensional object and directly generate three-dimensional data.

Next, in the molding model data production process, the three-dimensional data is divided into a plurality of layers to produce two-dimensional layer data for each layer. After that, the 3D printer 2 is controlled to perform a resin model manufacturing process for manufacturing a resin model based on the layer data (S02). In the molding model data production process, based on the two-dimensional data group D1 such as still images and moving images shown in FIG. At the same time, the three-dimensional data D2 is divided into a plurality of layer data D31, D31, . . . to produce a two-dimensional layer data group D3 for each layer.

In the resin model manufacturing process, the 3D printer 2 is used to manufacture the resin model 3 by molding and laminating two-dimensional cross-sectional layers of the real thing with resin based on the layer data D31, D31. The control of the 3D printer 2 in this resin model manufacturing process is performed by the operation from the information terminal device 1 .

In the present embodiment, the resin material constituting the resin model is not particularly limited as long as it is a resin that is decomposed and vaporized by a metal such as molten aluminum introduced into the sand mold. (EPS), polymethyl methacrylate, polyethylene, polypropylene, polyurethane, and the like can be employed.

After that, casting is performed using the resin model 3 manufactured in this manner. This casting process includes a molding/pouring process (S03) for molding a sand mold 5 and pouring molten metal into the molded sand mold, as shown in FIGS. It includes a cooling and demolding step (S04) for cooling and demolding the finished casting 6 from the sand mold, and a shaping step (S05) for polishing the demolded casting 6 and the like.

In the molding process, the resin model 3 is placed in the mold 4 configured in a box shape by the outer frames 41, 41 divided into two by a vertical cross section, and the mold 4 is filled with foundry sand to form the resin model 3. is buried in casting sand to form a sand mold 5. As the foundry sand that constitutes the sand mold used here, those used in conventionally known casting methods can be suitably used. For example, natural sand such as silica sand and artificial sand such as spherical aggregate are used. be able to. In addition, the foundry sand forming the sand mold is usually bound with a binding agent in order to ensure the necessary strength in the pouring process. Here, the binder is not particularly limited, and examples thereof include furan resin. As for the strength required for the foundry sand, the resistance to pressure (breaking compressive strength) is usually preferably 15 kg/cm ² or more, more preferably 20 kg/cm ² or more.

In this molding process, the connection member 31 for connecting the blow port 42 and the resin model 3 is attached to the resin model 3 and embedded in the casting sand. At this time, the injection port 42 is drilled in the outer frame 41 so as to match the embedding position of the connecting member 31 calculated by the sand mold calculator 146, and the resin model 3 is installed while filling the outer frame 41 with foundry sand. At the same time, the connecting member 31 is fixed to the connecting portion calculated by the sand mold calculation unit 146, the resin model 3 and the blowing port 42 are connected by the connecting member 31, and the outer frames 41, 41 are closed.

In the pouring step, melted metal is injected from a blowing port 42 arranged in at least one place on the outer surface of the sand mold 5 and is brought into contact with the resin model 3 embedded inside, thereby dissolving the resin constituting the resin model 3. The resin model 3 is decomposed and vaporized to substantially disappear, and the cavity formed by the disappearance of the resin model 3 is filled with the injected molten metal as molten metal.

At this time, since the connecting member 31 is arranged, the connecting member 31 disappears first by the molten metal introduced from the blow port 42 to form a cavity, and then the molten metal introduced from the blow port 42 Since the molten metal is guided to the resin model 3 through this cavity, the molten metal can be brought into contact with the resin model 3 efficiently and reliably.

Then, in a state where the molten metal is filled as molten metal, the poured metal is cooled, the sand mold 5 is crushed, the finished casting 6 is demolded, and the demolded casting 6 is polished. I do.

(Overall configuration of casting system)
The configuration of the casting system according to this embodiment will be described. FIG. 1 shows the overall configuration of a casting system according to an embodiment. The casting system according to the present embodiment is roughly composed of an information terminal device 1 operated by a user and a 3D printer 2 for molding a resin model by 3D printing. In addition, in this embodiment, the information terminal device 1 will be described as an example of the information processing terminal device.

The casting system according to the present embodiment comprises an information terminal device 1 having a communication function and an application execution function, and a 3D printer 2 that is connected to the information terminal device 1 via a communication means and molds a resin model by 3D printing. Configured. In the casting system, the information terminal device 1 used by the user, such as a smartphone, is used to execute the molding model data production process for producing the three-dimensional data and layer data necessary for producing the resin model. Based on the layer data, the 3D printer 2 is remotely operated to perform a resin model manufacturing process for manufacturing the resin model 3 .

The 3D printer 2 is a three-dimensional printing device that functions as a resin model manufacturing means that manufactures the resin model 3 by molding and laminating two-dimensional cross-sectional layers of the actual object based on the layer data D31, D31. In this embodiment, it is connected to a user's information terminal device 1 through a communication network such as a Wi-Fi network, a wired LAN, and a USB cable, and executes 3D printing according to three-dimensional data and operation signals from the information terminal device 1. . This 3D printer 2 is a device that manufactures a three-dimensional model by stacking sliced two-dimensional layers one by one based on three-dimensional data D2 that defines a three-dimensional shape with polygons. As a 3D printer 2, the basic operation is a lamination method in which thin layers are stacked, and there are various methods such as the “stereolithography method” in which liquid resin is gradually cured with ultraviolet rays, and the “FDM method” in which heat-melted resin is stacked. Any type of printer can be used.

The information terminal device 1 is a portable information processing terminal device that utilizes wireless communication, and includes an arithmetic processing device such as a CPU. It is a device that provides a function. As this information processing terminal device, in addition to a smartphone, for example, it can be realized by a general-purpose computer such as a personal computer or a dedicated device with specialized functions, such as a tablet PC, mobile computer, mobile phone, wearable terminal device, game and other information processing terminal equipment.

In addition, the information terminal device 1 can wirelessly communicate with a relay point such as a wireless base station and receive communication services such as telephone calls and data communications while moving. Communication methods for calls and data communications include, for example, 3G (3rd. Generation), LTE (Long Term Evolution), 4G, FDMA, TDMA, CDMA, W-CDMA, PHS (Personal Handyphone System) method and the like. The information terminal device 1 is equipped with various functions such as a digital camera function, application software execution function, position information acquisition function by GPS (Global Positioning System), and mobile computers such as tablet PCs.

The position information acquisition function provided in the information terminal device 1 is a function of acquiring and recording position information indicating the position of the device itself. It includes a method of detecting the position of the device by signals from the mobile phone, and a method of detecting the position by the strength of the radio waves from wireless base stations for mobile phones and Wi-Fi communication access points.

The information terminal device 1 includes a display unit such as a liquid crystal display for displaying information, and an operation device such as an operation button for a user to perform an input operation. A touch panel is provided as an input unit for acquiring an operation signal by a touch operation or the like for designating a coordinate position on the liquid crystal display. Specifically, this touch panel is an input device that inputs operation signals by pressure from touch operations using a user's fingertip or pen. and a touch sensor that receives an operation signal corresponding to the .

In the molding model data production process, still images and moving images taken by the camera 121 of the information terminal device 1 or by other photographing equipment are acquired as a two-dimensional data group D1. 5, the three-dimensional data D2 is divided into a plurality of layers, and two-dimensional layer data D31, D31, . . . are produced for each layer. Also, in the resin model manufacturing process, the 3D printer 2 is controlled by remote control via communication from the information terminal device 1, and based on the layer data D31, D31, the actual two-dimensional cross-sectional layers are molded with resin. A resin model 3 is manufactured by laminating them.

(casting program)
The casting method and casting system according to the present embodiment described above can be realized by executing an application, which is a casting program of the present invention written in a predetermined language, on a computer such as the information terminal device 1. That is, the casting program of the present invention is installed in an IC chip or memory device of a portable terminal device, a smart phone, a wearable terminal, a mobile PC or other information processing terminal, a general-purpose computer such as a personal computer or a server computer, and executed on the CPU. By doing so, a casting system having the functions described above can be constructed and the casting method can be carried out.

Specifically, in the casting program of the present embodiment, the information terminal device 1 is
(1) Based on a two-dimensional two-dimensional data group, three-dimensional data is generated by three-dimensionalizing the subject of the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers, and each layer is two-dimensional layer data. The molding model data production department that produces the
(2) a control unit for controlling a resin model manufacturing means for manufacturing a resin model by molding and stacking actual two-dimensional cross-sectional layers with resin based on each layer data;
It functions as a sand mold calculation unit that calculates the positioning in the sand mold when the resin model is embedded in the molding sand.
(Internal structure of information processing terminal)
The internal structure of the information terminal device 1 will be described below. FIG. 2 shows the internal configuration of the information terminal device 1 according to this embodiment. It should be noted that the term "module" used in the description refers to a functional unit configured by hardware such as a device or equipment, or software having such functions, or a combination thereof, to achieve a predetermined operation. . As shown in FIG. 2, the information terminal device 1 includes a communication interface 11, an input interface 12, an output interface 13, an application executing section 14, and a memory 15. FIG.

The communication interface 11 is a communication interface for data communication, and has a function of wireless communication including 3G to 5G, Bluetooth (registered trademark), and Wifi, and contact (wired) communication using a cable such as USB, adapter means, etc. It has The input interface 12 is a device through which user operations such as a mouse, a keyboard, operation buttons, and a touch panel 12 a are input, as well as still images and moving images captured by the camera 121 . Also, the output interface 13 is a device such as a display and a speaker that outputs video and sound. In particular, the output interface 13 includes a display section 13a such as a liquid crystal display, and the display section 13a is superimposed on the touch panel 12a as an input interface.

The memory 15 is a storage device that stores an OS (Operating System), firmware, programs for various applications, other data, and the like. In addition, application data such as the casting program of the present invention is accumulated, and various data processed by the application execution unit 14 are accumulated.

The application execution unit 14 is a module that executes applications such as a general OS, various applications, and browser software, and is usually realized by a CPU or the like. By executing the casting program according to the present invention, the application execution unit 14 generates an information acquisition unit 141, a display data generation unit 142, a display control unit 143, an operation information acquisition unit 144, and molding model data. A production section 145, a sand mold calculation section 146, and a molding control section 147 are virtually constructed.

The information acquisition unit 141 is a module that acquires still images and moving images captured by the camera 121, and acquires still images and moving images captured by other devices in a file format. The information acquisition unit 141 acquires information by reading data stored in the memory 15, receiving data from another device through the communication interface 11, and generating or processing data in the information terminal device 1. This includes both cases of reading data that has been

The display data generation unit 142 is a module that generates display data to be displayed on the display unit 13a. The display data is data generated by combining 3D graphic data, image data, character data, moving image data, audio and other data. The display processing of the display data generated by the display data generator 142 is controlled by the display controller 143 .

The display control unit 143 displays the two-dimensional data used in the molding model data production unit 145 and the created three-dimensional data, and controls various GUI (Graphical It is a module that provides a User Interface). The operation information acquisition unit 144 is a module that inputs an operation to the GUI controlled by the display control unit 143 based on an operation signal from the touch panel 12a.

Based on the two-dimensional two-dimensional data group D1, the modeling model data production unit 145 generates three-dimensional data D2 by rendering the subject of the two-dimensional data group D1 three-dimensional, and divides the three-dimensional data D2 into a plurality of layers. This is a module for producing two-dimensional layer data D31, D31 for each layer. The sand mold calculator 146 is a module that calculates the positioning in the sand mold 5 when the resin model 3 is embedded in the molding sand. In this embodiment, the sand mold calculation unit 146 also calculates the positioning of the connection member 31 that connects the blow port 42 and the resin model 3 together with the resin model 3 to be embedded in the molding sand.

Specifically, the molding model data production unit 145 has a function of generating stereoscopic three-dimensional data D2 representing the subject in the two-dimensional data group D1. 3D data D2 representing the shape and color of the subject is generated using a method such as photogrammetry, for example, based on the image and a plurality of frame images included in the moving image. In this photogrammetry method, for example, parallax information is analyzed from two-dimensional images obtained by photographing a three-dimensional object from a plurality of observation points, dimensions and shapes are calculated, and polygon data etc. are used to calculate each surface of the three-dimensional object. Define the vertex coordinate table. Note that the camera 121 may be provided with a function as a 3D scanner, and the 3D scanner function reads the shape and color of a three-dimensional object, and the molding model data production unit 145 directly generates three-dimensional data. You may do so.

In the calculation of the positioning of the connecting member 31 by the sand mold calculator 146, after the positioning of the resin model 3 in the sand mold 5 is calculated, the topmost portion of the resin model 3 in the sand mold 5 is calculated. This top portion is the highest position in the height direction of the resin model 3 in the sand mold 5, and the portion where the horizontal cross-sectional area of the connecting member 31 on the surface of the resin model 3 can be secured is scanned to specify the portion. At this time, the positioning adjustment of the blowing port 42 may be performed at the same time. That is, after the site (connection site) for connecting the connecting member 31 on the surface of the resin model 3 is determined, the position of the resin model 3 in the sand mold 5 is adjusted so that the blow port 42 is positioned vertically above the connection site. Adjust the drilling position of the blowing port 42 with respect to the outer frame 41 as shown in FIG.

The modeling control unit 147 is a module that remotely operates and controls the 3D printer 2 based on the layer data D31 and D31 that are produced based on user operations. Specifically, a control command for the 3D printer 2 is generated based on the user operation acquired by the operation information acquisition unit 144 and transmitted to the communication interface 11, and a response signal from the 3D printer 2 is transmitted through the communication interface 11. Acquired and reflected in the GUI controlled by the display control unit 143 .

(Operation of casting system)
The casting method of the present invention can be carried out by operating the casting system described above. FIG. 4 shows the operation of the casting system. Note that the processing procedure described below is merely an example, and each processing may be changed as much as possible. Further, in the processing procedures described below, steps can be omitted, replaced, or added as appropriate according to the embodiment.

As shown in the figure, first, the two-dimensional data group D1 and formwork information are acquired through the information acquisition unit 141 (S201). Based on the obtained two-dimensional data group D1, the object in the two-dimensional data group D1 is three-dimensionalized to generate three-dimensional data D2 (S202). Specifically, the molding model data production unit 145 uses a method such as a photogrammetry method, for example, based on a plurality of images included in the two-dimensional data group D1 and a plurality of frame images included in the moving image, Three-dimensional data D2 representing the shape and color of the object is generated. In this photogrammetry method, for example, parallax information is analyzed from two-dimensional images obtained by photographing a three-dimensional object from a plurality of observation points, dimensions and shapes are calculated, and polygon data etc. are used to calculate each surface of the three-dimensional object. Define the vertex coordinate table. Note that the camera 121 may be provided with a function as a 3D scanner, and the 3D scanner function reads the shape and color of a three-dimensional object, and the molding model data production unit 145 directly generates three-dimensional data. can also

Next, the three-dimensional data is divided into a plurality of layers to create two-dimensional layer data for each layer (203). Along with this, the sand mold calculation unit 146 calculates the positioning in the sand mold when embedding the resin model 3 in the molding sand (S204). Moreover, in calculating this positioning, the positioning of the connecting member 31 that connects the blowing port 42 and the resin model 3 is also calculated.

In order to execute stereoscopic printing of the layer data thus produced, the information terminal device 1 accesses the 3D printer and transfers the layer data to the 3D printer 2 (S205). On the side of the 3D printer 2 that has received this layer data (S101), according to control by the information terminal device 1, stereoscopic printing is started. In the 3D printer 2 that has started the three-dimensional printing, based on the layer data D31, D31, the two-dimensional cross-sectional layers of the actual object are laminated while being sequentially molded with resin to manufacture a resin model ("N" in S102 and S103). ”).

After that, when all the cross-sectional layers are molded ("Y" in S103), the resin model 3 is completed, and end processing is executed (S104 and S206). As described above, the resin model 3 manufactured in this way is placed in the mold 4, and the mold 4 is filled with foundry sand, whereby the resin model 3 is buried in the foundry sand and formed into a sand mold. 5 is molded. Molten metal is injected from the blowing port 42 of the sand mold 5 to decompose and vaporize the resin constituting the resin model 3 to substantially eliminate the resin model 3, and a cavity formed by the disappearance of the resin model 3. The molten metal injected into is filled as molten metal. In this state, the poured metal is cooled to solidify the molten metal, the sand mold 5 is crushed, the solidified casting product 6 is demolded, and the demolded casting product 6 is polished and shaped.

(action/effect)
According to the casting method, casting system, and casting program according to the present embodiment, three-dimensional data is generated from a two-dimensional data group that is a two-dimensional image or moving image, and based on this, a resin model is made by a 3D printer, A casting product can be manufactured by embedding this resin model in a sand mold and pouring molten metal such as aluminum. Since the resin model can be molded using a 3D printer, it can be manufactured in small quantities at low cost, and since the resin can be eliminated by molten metal, the manufacturing cost can be reduced even when manufacturing a small quantity. .

Moreover, according to the casting program according to the present embodiment, by installing it in a computer and executing it on the CPU, it is possible to construct a casting system having the functions described above and carry out the casting method. The casting program according to the present embodiment can be distributed, for example, through a communication line, and can be stored in a computer-readable recording medium to operate on a standalone computer as a package application program. can be transferred as Specifically, the recording medium can be a magnetic recording medium such as a flexible disk or a cassette tape, an optical disk such as a CD-ROM or a DVD-ROM, or various recording media such as a RAM card. Then, according to the computer-readable recording medium recording this program, it is possible to easily implement the above-described casting system and casting method using a general-purpose computer or a dedicated computer, save the program, Easy to transport and install.

It should be noted that the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying constituent elements without departing from the gist of the present invention at the implementation stage. Also, various inventions can be formed by appropriate combinations of the plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments.

D1... Two-dimensional data group D2... Three-dimensional data D3... Layer data group D31, D31... Layer data 1... Information terminal device 2... D printer 3... Resin model 4... Formwork 5... Sand mold 6... Casting product 11... Communication interface DESCRIPTION OF SYMBOLS 12... Input interface 12a... Touch panel 13... Output interface 13a... Display part 14... Application execution part 15... Memory 31... Connection member 41, 41... Outer frame 42... Vent 121... Camera 141... Information acquisition part 142... Display data generation Part 143... Display control part 144... Operation information acquisition part 145... Molding model data production part 146... Sand mold calculation part 147... Molding control part

Claims (6)

Based on a two-dimensional data group that is a two-dimensional image or moving image, three-dimensional data is generated by three-dimensionalizing a subject in the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers and layer-by-layer. A molding model data production process that produces two-dimensional layer data,
a resin model manufacturing process for manufacturing a resin model by molding and laminating two-dimensional cross-sectional layers of the actual object based on the layer data;
a molding step of embedding the resin model in molding sand to mold a sand mold;
Molten metal is injected from a blowing port arranged at least in one place on the outer surface of the sand mold, brought into contact with the resin model, and the resin constituting the resin model is decomposed and vaporized to substantially form the resin model. a pouring step of filling the cavity formed by the disappearance of the resin model with the injected molten metal as molten metal;
A casting method comprising: 2. The casting method according to claim 1, wherein in said molding step, a connecting member for connecting said blow port and said resin model is embedded in said molding sand together with said resin model. Based on a two-dimensional data group, three-dimensional data is generated by three-dimensionalizing the subject of the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers to generate two-dimensional layer data for each layer. With the molding model data production department to produce,
resin model manufacturing means for manufacturing a resin model by molding and laminating actual two-dimensional cross-sectional layers with resin based on each layer data;
A casting system, comprising: a sand mold calculation unit for calculating positioning in the sand mold when the resin model is embedded in molding sand. 4. The casting system according to claim 3, wherein said sand mold calculation unit also calculates a position for burying a connecting member connecting said blow port and said resin model together with said resin model in said casting sand. the computer,
Based on a two-dimensional data group, three-dimensional data is generated by three-dimensionalizing the subject of the two-dimensional data group, and the three-dimensional data is divided into a plurality of layers to generate two-dimensional layer data for each layer. With the molding model data production department to produce,
A control unit for controlling a resin model manufacturing means for manufacturing a resin model by molding and stacking actual two-dimensional cross-sectional layers with resin based on each layer data,
A casting program characterized by functioning as a sand mold calculation unit for calculating positioning in a sand mold when the resin model is embedded in casting sand. 6. The casting program according to claim 5, wherein said sand mold calculation unit also calculates a position for burying a connecting member connecting said blow port and said resin model together with said resin model in said molding sand.

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