JPH06226869A - Manufacture of three-dimensional foamed body and device therefor - Google Patents

Abstract

PURPOSE:To manufacture a three-dimensional foamed body without using a mold and without cutting and sticking block materials and plate materials. CONSTITUTION:When a foamed body having a predetermined three-dimensional shape made of a thermoplastic resin is to be manufactured, an unset matter of the thermoplastic resin 7 is discharged from a nozzle 15. The nozzle 18 and a resin receiver 21 are moved relatively so as to form the unset matter of the thermoplastic resin 7 into a layer at the resin receiver 21 and to layer it solidly. The unset matter is cured so as to form the foamed body having the predetermined three-dimensional shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a three-dimensional foam suitable for producing a three-dimensional vanishing model used in, for example, full mold casting which is a kind of casting method. In particular, a method for producing a three-dimensional foam suitable for producing a three-dimensional foam without using a mold and also without carving or pasting a block material or a plate material. And manufacturing equipment.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a three-dimensional foam of this type, for example, the method shown in FIG. 10 has been adopted.

In the manufacturing method shown in FIG. 10, the steam holes 52 are formed in the molding surface of the molding die 51, and the steam pipe 53 is provided inside the molding die 51, as shown in FIG. As described above, after the foaming beads 54 such as unfoamed or pre-foamed polystyrene are put in the molding die 51, as shown in FIG. 10B, the lid 55 is closed and the steam pipe 53 is closed.
More steam is supplied to heat the entire molding die 51, and the foaming beads 54a are fixed to each other while the foaming beads 54 inside are completely foamed as shown in FIG. 10C. As shown in (D), this is a method of forming a foam 55 having a three-dimensional shape.

As a method for producing a three-dimensional foam without using a molding die as shown in FIG. 10, there is a method which goes through the steps shown in FIG.

The manufacturing method shown in FIG. 11 is a method generally used for manufacturing a vanishing model when casting a very small amount of casting such as a press mold.
11. In FIG. 11, as shown in (A-1) of FIG. 11, a block 61 made of a relatively large fusible material is prepared, and then, as shown in (A-2) of FIG. The shaped portion 62a is manufactured by cutting the shaped surface 62a with an NC processing machine or the like.
As shown in (B-1) of No. 1, a plate 6 made of a fusible material
3 is prepared and then cut as appropriate, and then (B-
As shown in 2), a backup structure 64 as shown in (B-3) of FIG. 11 is manufactured by pasting with glue or double-sided tape, and then (A + B) of FIG.
As shown in FIG. 11, the molding portion 62 and the backup structure portion 64 are joined together, while in step C, (C- of FIG.
As shown in FIG. 1), a bar made of a fugitive material having a right-angled isosceles triangular cross section is prepared and cut into an appropriate length to form a corner bar 65, and then (A + B) in FIG.
As shown in + C), the corner rods 65 are attached to the corners of all joints, and reinforcement is applied to prevent deformation when the lost model is sand-filled. The three-dimensional foam 66 is assembled.

Furthermore, as shown in FIG. 11, as a method for manufacturing a three-dimensional foam without cutting or sticking a plurality of members by cutting out, as shown in FIG. By preparing a large-sized block that has been manufactured, and cutting the large-sized block from the part corresponding to the bottom side of the three-dimensional shape of the block 71, as shown in FIG. Excessive portions are removed, leaving portions 72 corresponding to the ribs of the structure,
Next, after the block 71 is turned upside down, as shown in FIG. 12 (B), the side of the molding surface 73 is cut and further chamfered on the side surface as shown in FIG. 12 (C), Three-dimensional foam 7 used as a vanishing model
No. 4 (Japanese Patent Laid-Open No. 1-157740).
issue).

Further, as a method which does not use a molding die and does not require a large block, FIG. 13 and FIG.
There was one shown in 4.

According to this method, three-dimensional data corresponding to the three-dimensional shape of the foam to be produced is created, and then
Layered data of unit thickness is created based on this three-dimensional data, and contour shape data of this layered data is created and used as data for cutting processing, and disappears based on this cutting processing data. A plate-shaped member made of a flexible material is cut into a predetermined contour shape to manufacture each layer, and FIG.
As shown in (A), (B), and (C) of FIG.
The three-dimensional foamed body 82 was formed by carrying out the work of sequentially stacking 1 in the steps shown in FIG. 14 (JP-A-3-114619).

[0009]

However, as shown in FIG.
In the conventional method shown in (1), since it is necessary to use the molding die 51 in order to give the foam 55 a three-dimensional shape, the manufacturing period becomes long, and it is unsuitable for the single production of the vanishing model for full mold casting. There was a problem.

Further, the conventional method shown in FIG. 11 has a problem that it is difficult to shorten the manufacturing period because the work of cutting out the material and assembling the structural portion are all performed manually.

Further, in the conventional method shown in FIGS. 12 to 14, it is necessary to newly prepare machining data based on the shape data, and when the shape is complicated or the cutting direction is large. If there is a shaded area, it becomes impossible to cut, and moreover, most of the lossy material is discarded as chips, so the yield is poor and a disposal process is required. There was a point.

Therefore, there has been a problem that it is desired to develop a new method and apparatus for manufacturing a three-dimensional foam body which solves these problems.

[0013]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and it is possible to manufacture a foam having a three-dimensional shape without using a molding die and at the same time, a fusible material. It can be manufactured without cutting or pasting the block or plate made of the following materials, and it is possible to improve the yield of the fusible material and reduce the burden of disposal, and to automate the manufacturing. It is an object of the present invention to provide a method and an apparatus for manufacturing a three-dimensional foam body which can improve the efficiency and shorten the manufacturing period.

[0014]

The method for producing a three-dimensional foam according to the present invention is such that when a foam having a predetermined three-dimensional shape is produced from a thermoplastic resin, the thermoplastic resin is uncured. The object is discharged from the nozzle and the nozzle side and the resin receiving side are relatively moved to form the uncured material of the thermoplastic resin in the resin receiving side in a layered form and stacked three-dimensionally, during or after this. It is characterized in that it is configured to form a foam of a predetermined three-dimensional shape by curing the uncured product, in the embodiment, an uncured product obtained by enclosing a gas in a liquefied or semi-liquefied thermoplastic resin. The uncured product of the foamed thermoplastic resin in which the gas in the thermoplastic resin discharged from the nozzle is expanded while the nozzle side and the resin receiving side are relatively moved while being discharged from the nozzle is formed in a layer on the resin receiving side. In addition, in the same embodiment, the expanded granular thermoplastic resin is discharged from the nozzle together with the binder, and the nozzle side and the resin receiving side are relatively moved and discharged from the nozzle. It is characterized in that an uncured product of a foamed granular thermoplastic resin mixed with a binder is formed in layers on the resin receiving side and laminated in three dimensions.

Further, in the embodiment of the present invention, the solid data model produced in the same shape as the foam having the predetermined three-dimensional shape to be produced is divided into slices and used as slice data. Is distinguished from the imaginary part, and an uncured thermoplastic resin is discharged from a nozzle into a space corresponding to the inside of the real part, and the nozzle side and the resin receiving side are moved relatively to each other. An uncured thermoplastic resin is formed in layers on the resin receiving side for each slice data and laminated in a three-dimensional shape corresponding to the number of divisions. During or after this, the uncured material is cured to give a predetermined three-dimensional shape. It is characterized in that it is formed into a foam.

Further, the apparatus for producing a three-dimensional foam according to the present invention comprises first computing means for producing a three-dimensional solid model having the same shape as the foam having a predetermined three-dimensional shape to be produced, and the first operation means. Second calculation means for dividing the solid solid model produced by the calculation means into slice data into slice data and discriminating the real part and the imaginary part of the slice data; and the slice data by the second calculation means. Nozzle formed by discharging an uncured material of a thermoplastic resin when the fruit portion is discriminated to form a layer in the space corresponding to the inside of the resin receiving side and the nozzle side, and The present invention is characterized in that it is provided with a driving means for relatively moving the resin receiving side.

[0017]

The method and apparatus for producing a three-dimensional foam according to the present invention has the above-mentioned structure and has a predetermined three-dimensional shape made of a thermoplastic resin suitable as a fugitive material such as polystyrene. When manufacturing a foam, an uncured thermoplastic resin in which gas is enclosed in the thermoplastic resin or an uncured thermoplastic resin in which a binder is mixed with foamed granular thermoplastic resin is discharged from a nozzle. At the same time, the nozzle side and the resin receiving side are moved relative to each other to form the uncured material of the thermoplastic resin in a layered manner on the resin receiving side and stack three-dimensionally, and during or after this, the uncured material is cured. As a result, a foam structure of a predetermined three-dimensional shape is formed, so that a foam structure of a three-dimensional shape can be manufactured without using a molding die, and a block or plate made of a disappearing material is cut. It is not necessary to prepare these blocks and plate materials because there is no need to process them, and cutting waste will not be generated, and since there is no work to attach these after cutting processing, workability will be extremely good. The automation, manufacturing efficiency and shortening of manufacturing time will be realized.

[0018]

FIG. 1 shows the basic structure of a mechanical part in an embodiment of a manufacturing apparatus used for carrying out the method of manufacturing a three-dimensional foam according to the present invention. , A stirring unit 2 for stirring the thermoplastic resin
And a liquefied or semi-liquefied thermoplastic resin under pressure and a pressure-feeding / discharging unit 3 having a nozzle for discharging the thermoplastic resin, and an uncured material of the discharged thermoplastic resin is formed in layers. It has a configuration mainly including a stacking unit 4 for stacking three-dimensionally.

FIG. 2 shows the stirring unit 2 of FIG. 1, and this stirring unit 2 is for keeping the stirring container 6 which can be completely sealed and the thermoplastic resin 7 inside in a liquid state. A heater 8, a blade 9 for stirring the liquid thermoplastic resin 7, a motor 10 for rotating the blade 9, an air pump 11 for pressurizing the inside of the stirring container 6, and a stirring unit 2. A valve 13 provided in the middle of a pipe 12 connecting the pressure feeding / discharging unit 3 is provided.

FIG. 3 shows the pressure-feeding / discharging unit 3 of FIG. 1, in which the liquid thermoplastic resin 7 is taken in from the stirring unit 2 and the pressure-feeding pipe 15 is fed at a stable constant flow rate and at a low speed. Screw 16 for pumping the inside
A motor 17 for rotating the screw 16, a nozzle 18 for discharging the liquid thermoplastic resin 7, and a nozzle 1
1 and 4, the nozzle 18 is shown to be movable in the X direction which is orthogonal to the drawings and in the Z direction which is the vertical direction in the drawings. Not connected to the appropriate drive means 20,
The movement of the nozzle 18 and the opening / closing operation of the opening / closing mechanism 19 are controlled by the data of a computer described later.

Further, FIG. 4 shows the laminated unit 4 of FIG.
And the stacking table 2 on the resin receiving side.
The laminating table 21 is connected to an appropriate driving means 20 so as to be movable in the Y direction which is the left-right direction in the drawing.
Is controlled by the data of the computer described later.

FIG. 5 shows a basic configuration of a control-related part of the three-dimensional foam production apparatus 1 according to the present invention. The three-dimensional shape is the same as the predetermined three-dimensional foam to be produced. First computing means 25 for producing a solid model
And a three-dimensional solid model produced by the computer A in slice form, for example, n.
The slice data is divided into layers, and the real part (the R part in FIG. 5) and the imaginary part (FIG. 5) of the slice data.
The computer B is provided as the second computing means 26 for discriminating the (I portion of).

As a result of the discrimination work of the real part and the imaginary part of the slice data by the computer B as described above, the real part is the uncured thermoplastic resin discharged from the nozzle 18 of the mechanism-related part shown in FIG. Corresponds to the portion to be filled.

Further, in the computer B, X, Y, Z of the nozzle 18 and the laminating table 21 so that the actual portion can be filled with the uncured material of the thermoplastic resin by one layer.
The control for performing relative movement in the directions, the control for moving the nozzle 18, and the control for opening / closing the opening / closing mechanism 19 are also performed.

When the computer B converts the three-dimensional shape data into slice data, it is preferable that the unit thickness of the slice layer corresponds to the thickness of the foamed thermoplastic resin discharged from the nozzle 18. .

When a three-dimensional foam is manufactured by using the three-dimensional foam manufacturing apparatus 1 having the mechanical mechanism shown in FIGS. 1 to 4 and the control mechanism shown in FIG. By operating the air pump 11, the inside of the stirring container 6 is maintained at a pressure higher than the external pressure, and the liquefied thermoplastic resin 7 inside is stirred at high speed by the blades 9. As a result, the high-pressure air 11a is taken into the thermoplastic resin 7 and the gas is enclosed.

When air is sufficiently taken into the thermoplastic resin 7 by this stirring, the valve 13 between the stirring unit 2 and the pressure feeding / discharging unit 3 is opened, the motor 17 is operated, and the screw 16 is rotated. By doing so, the thermoplastic resin 7 is drawn between the pressure feed pipe 15 and the screw 16.

By the rotation of the screw 16, the thermoplastic resin 7 is sent to the nozzle 18 at a constant pressure and flow rate, and when the opening / closing mechanism 19 of the nozzle 18 is opened, the thermoplastic resin 7 is discharged from the nozzle 18 to the outside at a low speed. To be done.

At this time, the high-pressure air 11a enclosed in the thermoplastic resin 7 expands in the atmosphere, so that the liquid thermoplastic resin is a foamed semi-liquid thermoplastic resin. It becomes a cured product. Further, since the resin is cooled with the expansion of the air enclosed in the thermoplastic resin, the curing of the foamed resin is promoted.

In this way, the uncured thermoplastic resin in a foamed state is discharged from the nozzle 18, and the control data of the movement of the nozzle 18 in the X direction and the control data of the movement of the laminating table 21 in the Y direction produced by the computer B are produced. Accordingly, one slice of slice data is discharged onto the moving table 21 and cured.

When the discharge of the thermoplastic resin for one layer is completed, the nozzle 18 produced by the computer B is
The nozzle 18 is moved upward by one layer of the slice data (upward in the Z direction) according to the control data of the Z direction movement, and the nozzle 18 is moved in the X direction according to the control data from the computer B in the new layer. And the stacking table 21 is moved in the Y direction to form and harden the next one layer in layers, and this is repeated to form the three-dimensional foam 30.

In the above embodiment, the nozzle 18 is moved in the X and Z directions, and the stacking table 21 is moved in the Y direction for stacking, but these may be relatively moved. Therefore, the present invention is not limited to the above embodiment.

As for the relative movement path of the nozzle 18 with respect to the stacking table 21, a so-called vector scanning path that moves in a single stroke along the shape of each layer,
Like a television scanning line, there is a raster scanning path that fills the shape surface by moving at a predetermined pitch in a direction perpendicular to this movement direction based on a reciprocating movement in one direction,
The scanning path is also not particularly limited.

FIG. 6 shows a modified example of FIG.
In the embodiment of FIG. 1, air is enclosed in the liquid thermoplastic resin 7 inside the stirring container 6, but as shown in FIG. 6, an air pump 11b is connected in the middle of the pressure feeding pipe 15,
Air may be enclosed in the liquid thermoplastic resin 7 in the pressure-feeding state.

FIG. 7 is an explanatory view showing the basic structure of a mechanically related portion in still another embodiment of the manufacturing apparatus used for carrying out the method for manufacturing a three-dimensional foam according to the present invention.
The manufacturing apparatus 31 includes a pressure-feeding unit 32 that discharges foamed granular thermoplastic resin at a constant pressure, a binder mixing unit 33 that mixes a binder into the foamed granular thermoplastic resin, and
A discharging unit 34 for discharging a foamed granular thermoplastic resin mixed with a binder, and a discharging unit 34 which is movable in the X direction orthogonal to the drawing and the Y direction in the lateral direction of the drawing and the Z direction in the vertical direction of the drawing which are orthogonal to each other. Laminating unit 3 for forming uncured thermoplastic resin into a layer and stacking it in a three-dimensional shape
5 mainly has a configuration.

Of these, the pressure feeding unit 32 includes a hopper 38 for accommodating the foamed granular thermoplastic resin 37 and the inside of the pressure feeding pipe 35 for taking in the foamed granular thermoplastic resin 37 from the hopper 38 and at a stable constant pressure and flow rate. A screw 36 for pressure-feeding the motor and a motor 39 for rotating the screw 36 are provided.

Further, the binder mixing unit 33 is provided at the tip of the pressure feed pipe 35 and mixes a binder into the mixing head 42 for receiving the foamed granular thermoplastic resin 37 fed under pressure. The binder injection device 43 is provided.

Further, the discharge unit 34 discharges the semi-liquid mixture of the expanded granular thermoplastic resin 37 and the binder mixed by the mixing head 42, and the discharge of the mixture from the nozzle 48. An opening / closing mechanism 49 for controlling is provided.

Further, the laminating unit 35 is provided with a laminating table 41 on the resin receiving side. The laminating table 41 has an X direction orthogonal to the drawing and a Y direction lateral to the drawing.
Is connected to an appropriate drive means 40 so as to be movable in the vertical direction and the Z direction in the vertical direction of the drawing. It is controlled by the computer data described later.

FIG. 8 shows a basic configuration of a control-related part of the three-dimensional foam production apparatus 31 shown in FIG. 7, which has the same shape as the three-dimensional foam to be produced. First computing means 45 for producing a solid shape model
And a three-dimensional solid model produced by the computer A in slice form, for example, n.
The slice data is divided into layers and the real part (R part in FIG. 8) and the imaginary part (FIG. 8) of the slice data are obtained.
And a computer B as a second calculation means 46 for discriminating between

As a result of the discrimination work of the real part and the imaginary part of the slice data by the computer B as described above, the real part is the uncured thermoplastic resin discharged from the nozzle 48 of the mechanism-related part shown in FIG. Corresponds to the portion to be filled.

In the computer B, the laminating table 41 is moved in the X, Y and Z directions orthogonal to each other (the nozzle 48) so that the uncured material of the thermoplastic resin can be further filled in the actual portion. (Relative movement in the X, Y, and Z directions between) and control for opening / closing the opening / closing mechanism 49.

When the three-dimensional shape data is sliced by the computer B, the unit thickness of the slice layer corresponds to the thickness of the binder mixed foamed granular thermoplastic resin discharged from the nozzle 48. It is preferable to make it.

When a three-dimensional foam is manufactured by using the three-dimensional foam manufacturing apparatus 31 having the mechanical mechanism shown in FIG. 7 and the control mechanism shown in FIG. The foamed granular thermoplastic resin 37 such as polystyrene beads foamed in the above is housed in the hopper 38, and the motor 39 is operated to rotate the screw 36, so that the thermoplastic resin 37 in the hopper 38 is pushed into the pressure feed pipe 35 and the screw. Pull in between 36.

By rotating the screw 36, the expanded granular thermoplastic resin 37 is mixed with the mixing head 42 at a constant flow rate.
Is mixed with the binder injected from the binder injection device 43, and when the opening / closing mechanism 49 is opened, the mixture of the binder and the foamed granular thermoplastic resin is discharged from the nozzle 48 at a constant speed. Discharged at low pressure.

In this way, the foamed granular thermoplastic resin mixed with the binder is discharged from the nozzle 48 and moved in the X and Y directions in accordance with the movement control data of the laminating table 41 produced by the computer B. One layer of data is discharged onto the laminating table 41 and cured.

When the discharge of the resin mixture for one layer is completed, the laminating table 41 is moved downward by one layer of the slice data (downward in the Z direction) according to the control data produced by the computer B. Then, according to the control data for a new layer from the computer B, the stacking table 41 is moved in the X direction and the Y direction to form and harden the next one layer, and this is repeated. Thus, the three-dimensional foam 30 is formed.

In the above embodiment, the stacking table 41 is moved in the X, Y and Z directions orthogonal to each other for stacking. However, this can be done by moving it relative to the nozzle 48. Since it is good, it is not limited to the above-mentioned embodiment.

Regarding the relative movement path of the nozzle 48 with respect to the stacking table 41, a so-called vector scanning path that moves in a single stroke along the shape of each layer,
Like a television scanning line, there is a raster scanning path that fills the shape surface by moving at a predetermined pitch in a direction perpendicular to this movement direction based on a reciprocating movement in one direction,
The scanning direction is also not particularly limited.

FIG. 9 shows a modified example of FIG.
A heater 47 may be provided in the portion of the mixing head 42 so that the foamed granular thermoplastic resins 37 are heated and adhered to each other to be ejected from the nozzle 48.

[0051]

EFFECTS OF THE INVENTION The method and apparatus for manufacturing a three-dimensional foam according to the present invention have the above-described structure, and therefore a three-dimensional foam structure can be manufactured without using a molding die. Since there is no need to make a mold and no blocks or plates made of fusible material are used, it is not necessary to prepare such blocks or plates, and these blocks or plates are cut. The cutting process is not required and a large amount of cutting waste is not discarded as shavings, which significantly improves the yield and eliminates the need for discarding work. Since the work of pasting is not required, the workability is considerably improved,
The production of the three-dimensional foam is facilitated to be automated, and the production efficiency is improved and the production time is shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a basic configuration of a mechanically related portion showing an embodiment of a three-dimensionally shaped foam manufacturing apparatus according to the present invention.

FIG. 2 is an explanatory view showing an enlarged portion of a stirring unit in FIG.

FIG. 3 is an explanatory view showing an enlarged portion of a pressure feeding / discharging unit in FIG.

FIG. 4 is an explanatory diagram showing a laminated unit portion of FIG. 1 in an enlarged manner.

FIG. 5 is an explanatory view showing a basic configuration of a control-related part showing an embodiment of the three-dimensional foam production apparatus according to the present invention.

6 is an explanatory view of a mechanism-related portion showing a modified example of the embodiment shown in FIG.

FIG. 7 is an explanatory view showing the basic structure of a mechanically related portion showing another embodiment of the apparatus for producing a three-dimensional foam according to the present invention.

FIG. 8 is an explanatory view showing a basic configuration of a control-related portion showing another embodiment of the apparatus for producing a three-dimensional shaped foam according to the present invention.

9 is an explanatory diagram of a mechanism-related portion showing a modified example of the other embodiment shown in FIG.

FIG. 10 is an explanatory diagram showing an example of a conventional method for producing a three-dimensional foam body in the order of (A), (B), (C), and (D).

FIG. 11 is an explanatory diagram showing another example of a conventional method for producing a three-dimensionally shaped foam by dividing it into (A step), (B step), and (C step).

FIG. 12 is an explanatory diagram showing still another example of a conventional method for producing a three-dimensional foam body in the order of (A), (B), and (C).

FIG. 13 is an explanatory diagram showing still another example of a conventional method for producing a three-dimensional foam body in the order of (A), (B), and (C).

FIG. 14 is an explanatory diagram showing a step in the conventional manufacturing method shown in FIG.

[Explanation of reference symbols] 1 three-dimensional foam production device 2 stirring unit 3 pressure feed / discharge unit 4 laminating unit 7 thermoplastic resin 18 nozzle 20 driving means 21 laminating table (resin receiving side) 25 first computing means (computer A) 26 Second computing means (computer B) 30 Three-dimensional foam 31 Manufacturing device for three-dimensional foam 32 Pressure feeding unit 33 Binder mixture unit 34 Discharging unit 35 Laminating unit 37 Thermoplastic resin 40 Driving means 41 Laminating Table (resin receiving side) 45 first computing means (computer A) 46 second computing means (computer B) 48 nozzles

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Claims (5)

[Claims] 1. When manufacturing a foamed body made of a thermoplastic resin and having a predetermined three-dimensional shape, an uncured material of the thermoplastic resin is discharged from a nozzle and the nozzle side and the resin receiving side are relatively disposed. Characterized in that the uncured product of the thermoplastic resin is formed into a layer on the resin receiving side and laminated in three dimensions, and the uncured product is cured to form a foam having a predetermined three-dimensional shape. A method for producing a three-dimensional foam. 2. A liquefied or semi-liquefied thermoplastic resin filled with gas is discharged from an uncured product, and the nozzle side and the resin receiving side are moved relative to each other to generate heat discharged from the nozzle. The method for producing a three-dimensional foam according to claim 1, wherein the uncured product of the expanded thermoplastic resin in which the gas in the plastic resin is expanded is formed into a layer on the resin receiving side and laminated three-dimensionally. 3. A foamed granular heat in which a foamed granular thermoplastic resin is discharged from a nozzle together with a binder and the nozzle side and the resin receiving side are relatively moved to be discharged from the nozzle and the binder is mixed. The method for producing a three-dimensional foam according to claim 1, wherein the uncured plastic resin is formed into a layer on the resin receiving side and laminated in a three-dimensional shape. 4. A slice data obtained by dividing a three-dimensional solid model produced in the same shape as a foam having a predetermined three-dimensional shape to be produced into slices, and determining a real part and an imaginary part of the slice data. , The uncured material of the thermoplastic resin is discharged from a nozzle into a space corresponding to the inside of the actual portion, and the uncured material of the thermoplastic resin is moved by moving the nozzle side and the resin receiving side relatively. The method for producing a three-dimensional foam according to any one of claims 1 to 3, wherein the slice data is formed in layers for each slice data on the receiving side and stacked three-dimensionally according to the number of divisions. 5. A first computing means for producing a three-dimensional solid model having the same shape as a foam having a predetermined three-dimensional shape to be produced, and a three-dimensional solid model produced by the first computing means in a slice form. Second calculating means for determining the real part and the imaginary part of the slice data as well as the divided slice data, and the thermoplastic resin when the real part of the slice data is determined by the second calculating means. A nozzle for discharging uncured material to form a layer in a resin receiving side and a space corresponding to the inside of the actual portion, and a driving means for relatively moving the nozzle side and the resin receiving side are provided. An apparatus for manufacturing a three-dimensional foam body, which is characterized in that