Resin product manufacturing method and resin product manufacturing device

Abstract

To provide a technology that can increase the strength of resin products produced by a three-dimensional printer of the thermal melting and laminating method.SOLUTION: In the manufacturing method for producing resin products using the 3D printer 3 of the thermal melting and laminating method, the 3D printer 3 is used to produce a first molding body 71 using a first resin having laser light absorption properties. Further, the 3D printer 3 is used to supply a second resin having laser light transmissivity to the surface of the first molding body 71 to produce a second molding body 81 to be laminated on the first molding body 71. The laser beam is then irradiated along a path from the second molding body 81 side through the irradiated area between the first molding body 71 and the second molding body 83 to the first molding body 71 to weld the first molding body 71 and the second molding body 81.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a technique for manufacturing resin products using a three-dimensional printer. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is known a technique for manufacturing a three-dimensional resin product by using a fused deposition modeling (FMD) three-dimensional printer (i.e., a 3D printer) (see, for example, Patent Document 1).

[0003] Specifically, the resin that is the material for the resin product is melted at high temperature, the molten resin is ejected from a molding nozzle in a string-like shape, and the string-like portions are layered and molded into a three-dimensional shape to produce the resin product. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-62128 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, as a result of detailed investigation by the inventors, the following problems were found in the conventional techniques. As mentioned above, when resin is supplied in a string-like shape (e.g., a cylindrical shape) and layered to form a three-dimensional shape using an FMD 3D printer, there are few interfaces (i.e., joints) where the layered string-like parts come into contact, which results in low strength at the interfaces, resulting in a problem of reduced strength of the resin product.

[0006] Furthermore, when resin is layered in a string-like shape, the condition of the string-like portion of the lower layer (for example, the degree of solidification) is not constant, and therefore the adhesive state of the string-like portion is not constant, which also means that the strength at the interface, and therefore the strength of the resin product, may not be sufficient.

[0007] One aspect of the present disclosure aims to provide a technique that can increase the strength of resin products manufactured by a fused deposition model three-dimensional printer. [Means for solving the problem]

[0008] a) One aspect of the present disclosure relates to a manufacturing method for manufacturing a resin product using a fused deposition modeling three-dimensional printer (3) that supplies molten resin in a string-like form from a modeling nozzle (11) to create a molded body.

[0009] In this method for manufacturing a resin product, a first molded body (71) is produced using a first resin having laser light absorption properties, and a second resin having laser light transparency is supplied to the surface of the first molded body to produce a second molded body (81) so as to be laminated on the first molded body. Then, laser light is irradiated along a path from the second molded body side, passing through an irradiation region between the first molded body and the second molded body, to the first molded body, thereby welding the first molded body and the second molded body.

[0010] With this configuration, it is possible to increase the strength of resin products manufactured using a fused deposition model three-dimensional printer. That is, in the present disclosure, the first molded body can be effectively heated by irradiating the laser light along a path from the second molded body side through the irradiation area between the first molded body and the second molded body to the first molded body. This allows mainly the surface of the first molded body to melt. Furthermore, since the second molded body is laminated on the first molded body, the heat of the heated first molded body is transferred to the second molded body. This allows the surface of the second molded body to be heated, and therefore the surface of the second molded body can also be melted. In this way, the first molded body and the second molded body are melted, and the first molded body and the second molded body can be welded together.

[0011] Then, by welding the first molded body and the second molded body in this manner, a resin product in which the first molded body and the second molded body are firmly joined together is obtained. b) Another aspect of the present disclosure relates to a manufacturing apparatus (1) for manufacturing a resin product using a fused deposition modeling three-dimensional printer (3) that supplies molten resin in a string-like form from a modeling nozzle (11) to create a molded body.

[0012] In this resin product manufacturing apparatus, the three-dimensional printer is equipped with a molding control unit (S100) configured to control the operation of the shaping nozzle (11A) to supply a first resin having laser light absorbency to produce a first molded body (71), and a lamination control unit (S110) configured to control the operation of the shaping nozzle (11B) to supply a second resin having laser light transmittance to the surface of the first molded body to produce a second molded body (81) to be laminated onto the first molded body.

[0013] The manufacturing apparatus includes a laser device (5) having a laser irradiation section (31) that irradiates laser light. The laser device is equipped with a laser control unit (S120) configured to control the operation of the laser irradiation unit and irradiate the laser light along a path from the second molded body side, passing through the irradiation area between the first molded body and the second molded body, to the first molded body, thereby welding the first molded body and the second molded body.

[0014] With this configuration, the strength of the resin product manufactured using the fused deposition modeling three-dimensional printer can be increased. That is, in the present disclosure, the first molded body can be effectively heated by irradiating the laser light along a path from the second molded body side through the irradiation area between the first molded body and the second molded body to the first molded body. This allows mainly the surface of the first molded body to melt. Furthermore, since the second molded body is laminated on the first molded body, the heat of the heated first molded body is transferred to the second molded body. This allows the surface of the second molded body to be heated, and therefore the surface of the second molded body can also be melted. In this way, the first molded body and the second molded body are melted, and the first molded body and the second molded body can be welded together.

[0015] Thus, by welding the first molded body and the second molded body together in this manner, a resin product is obtained in which the first molded body and the second molded body are firmly joined together. c) Yet another aspect of the present disclosure relates to a manufacturing apparatus (100) for manufacturing a resin product using a fused deposition modeling three-dimensional printer that supplies molten resin in a string-like form from a modeling nozzle (11) to create a molded body.

[0016] This resin product manufacturing apparatus includes, as the three-dimensional printer, a molding device (101) equipped with a molding control unit (S100) configured to control the operation of the shaping nozzle (11A) to supply a first resin having laser light absorbency to produce a first molded body (71), and a lamination device (103) equipped with a lamination control unit (S110) configured to control the operation of the shaping nozzle (11B) to supply a second resin having laser light transmittance to the surface of the first molded body to produce a second molded body (81) to be laminated on the first molded body.

[0017] The lamination device includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light. The laser device includes a laser control unit (S120) configured to control the operation of the laser irradiation unit to irradiate the laser light along a path from the second molded body side through an irradiation region between the first molded body and the second molded body to the first molded body, thereby welding the first molded body and the second molded body.

[0018] With this configuration, the strength of the resin product manufactured using the fused deposition modeling three-dimensional printer can be increased. That is, in the present disclosure, the first molded body can be effectively heated by irradiating the laser light along a path from the second molded body side through the irradiation area between the first molded body and the second molded body to the first molded body. This allows mainly the surface of the first molded body to melt. Furthermore, since the second molded body is laminated on the first molded body, the heat of the heated first molded body is transferred to the second molded body. This allows the surface of the second molded body to be heated, and therefore the surface of the second molded body can also be melted. In this way, the first molded body and the second molded body are melted, and the first molded body and the second molded body can be welded together.

[0019] Then, by welding the first molded body and the second molded body in this manner, a resin product in which the first molded body and the second molded body are firmly joined together is obtained. Furthermore, since the present disclosure includes a molding device and a lamination device, a first molded body can be produced by the molding device, and a second molded body can be produced by laminating the first molded body by the lamination device, which has the advantage of improving the flexibility of the manufacturing process.

[0020] Furthermore, the symbols in parentheses in this column and in the claims indicate a correspondence with the specific means described in the embodiments described later as one aspect, and do not limit the technical scope of the present disclosure. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1A is a front view showing an apparatus for manufacturing a resin product according to a first embodiment, and FIG. 1B is a plan view showing a configuration of a 3D printer used in the apparatus for manufacturing a resin product. [Diagram 2] FIG. 2 is a block diagram showing an electrical configuration of a manufacturing control device and the like in the first embodiment. [Diagram 3] 3A, 3B, and 3C are perspective views showing the method for manufacturing the resin product of the first embodiment. [Figure 4] 4A, 4B, and 4C are enlarged front views showing a main part of the method for producing a resin product according to the first embodiment. [Diagram 5]4 is a flowchart showing a process performed by the manufacturing control device according to the first embodiment. [Figure 6] FIG. 11 is a perspective view showing a laminate in Modification 1. [Figure 7] FIG. 7A is a front view showing a shaping nozzle including a laser irradiation unit and a jet nozzle in Modification 3, and FIG. 7B is a plan view showing a shaping nozzle including a laser irradiation unit and a jet nozzle. [Figure 8] FIG. 11 is a perspective view showing a method for manufacturing a resin product according to a second embodiment. [Figure 9] FIG. 11 is a front view showing a manufacturing apparatus for a resin product according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. First embodiment] In the present first embodiment, a technique for manufacturing a resin product using a fused deposition modeling (FMD) three-dimensional printer will be described.

[0023] [1-1. Overall composition] As shown in FIG. 1A, the resin product manufacturing apparatus (hereinafter, manufacturing apparatus) 1 of this first embodiment mainly includes a configuration (hereinafter, 3D printer) 3 that functions as a fused deposition modeling three-dimensional printer, a configuration (hereinafter, laser apparatus) 5 for irradiating laser light, a configuration (hereinafter, gas apparatus) 7 for injecting high-pressure gas, and a manufacturing control device 9 that controls the operation of the manufacturing apparatus 1.

[0024] Each component of the manufacturing apparatus 1 will be described below. <3D printer> 1B, as is well known, a fused deposition modeling 3D printer 3 includes a modeling nozzle 11 that ejects resin from the tip, a movement mechanism 13 that moves the modeling nozzle 11 in three-dimensional directions, a modeling stage 15 on which a molded body manufactured from the resin is placed, and a base 17 that supports the modeling stage 15, etc. Here, an example will be described in which two modeling nozzles 11A and 11B are used.

[0025] The three-dimensional directions refer to the X-, Y-, and Z-axis directions of an XYZ coordinate system, which is a Cartesian coordinate system. The XY plane is the horizontal plane, and the Z-axis direction is the vertical direction. As is well known, the shaping nozzle 11 includes a through hole penetrating in the axial direction and a heater arranged around the through hole (not shown). In the shaping nozzle 11, a string-like solid resin material, for example, called a filament, is supplied from the outside to the through hole, heated and melted by the heater, and supplied from the opening at the tip of the through hole.

[0026] In addition to the method of supplying a filament, a method of melting a resin pellet and outputting it from the molding nozzle 11 can also be used, and there are no particular limitations as long as it is a fused deposition modeling method. As the movement mechanism 13, a well-known configuration used in a 3D printer 3 can be adopted, and an example thereof will be described here.

[0027] For example, on the top surface of base 17, in a plan view from the Z-axis direction (see Figure 1B), the moving mechanism 13 includes four Z-axis members 21 which are pillars arranged at the four corners of base 17 and extend in the Z-axis direction, each of columnar Y-axis members (i.e., a pair of left and right Y-axis members) 23 horizontally spanning along the Y-axis direction between the two Z-axis members 21 on both sides in the Y-axis direction, and one columnar X-axis member 25 horizontally spanning along the X-axis direction between the left and right Y-axis members 23.

[0028] The Y-axis member 23 sandwiched between the pair of Z-axis members 21 is capable of moving horizontally along the Z-axis direction. The pair of left and right Y-axis members 23 move in the same manner in the Z-axis direction while maintaining a parallel state.

[0029] Although not shown, the movement of the Y-axis member 23 is configured to be performed by a motor and gears and belts that transmit the driving force of the motor, as is well known. The X-axis member 25 sandwiched between a pair of left and right Y-axis members 23 is movable in the Y-axis direction on the surface of the Y-axis member 23. Although not shown, the movement of the X-axis member 25 is configured to be performed by a motor, gears or belts that transmit the driving force of the motor, or the like, as is well known.

[0030] The two object-making nozzles (i.e., the first object-making nozzle 11A and the second object-making nozzle 11B) are attached to the X-axis member 23 so as to be movable in the X-axis direction. Although not shown, the movement of each object-making nozzle 11 is configured to be performed by a motor, a gear or a belt that transmits the driving force of the motor, or the like, as is well known.

[0031] Here, a 3D printer in which each modeling nozzle 11 moves in the directions of the X, Y, and Z axes has been given as an example, but any known configuration can be adopted as a fused deposition modeling 3D printer. For example, a known configuration can be adopted in which each modeling nozzle 11 is movable in the Z-axis direction and the Y-axis direction, and the modeling stage 15 is moved in the Y-axis direction. Also, a known configuration can be adopted in which each modeling nozzle 11 is movable in the X-axis direction and the Y-axis direction, and the modeling stage 15 is moved in the Z-axis direction. Alternatively, as is known, an X-axis member 25 may be disposed between a pair of left and right Z-axis members 21, the Z-axis member 21 may be movable in the Y-axis direction, the X-axis member 25 may be movable in the Z-axis direction, and each modeling nozzle 11 may be movable in the X-axis direction.

[0032] In addition, although the case where two shaping nozzles 11 are used has been described here, it is also possible to use one shaping nozzle 11, as will be described later. <Laser device> As shown in FIG. 1A, the laser device 5 includes a laser irradiation unit 31 that irradiates laser light, and a first arm device 33 that moves the laser irradiation unit 31 in three-dimensional directions.

[0033] As the first arm device 33, a multi-axis (for example, six-axis) robot arm can be used, and the first arm device 33 is attached to the base 17. The laser irradiation unit 31 is attached to the tip of a first arm device 33, and by operating the first arm device 33, the three-dimensional position of the laser irradiation unit 31 and the irradiation direction of the laser light can be freely set.

[0034] For example, as described below, the laser irradiation unit 31 can be moved in the same direction as the moving direction of the second modeling nozzle 11B. In addition, by adjusting the inclination of the laser irradiation unit 31, the direction in which the laser light is irradiated can be set to a predetermined inclination (e.g., an inclination at a predetermined angle from the horizontal) as described below.

[0035] The laser irradiation unit 31 (that is, the laser) can be appropriately selected from solid lasers such as a glass laser, ruby ​​laser, YAG laser, and titanium sapphire laser, gas lasers such as a He-Ne laser, CO2 laser, rare gas ion laser, and excimer laser, and semiconductor lasers.

[0036] In addition, the laser irradiation unit 31 can be used with an output that takes into account the composition of the resin used in the resin product. In other words, the laser irradiation unit 31 is used with an output that can melt the surface of the first molded body 71 (for example, see FIG. 3), which is the target to be heated by irradiating the laser light.

[0037] <Gas equipment> 1A, the gas device 7 includes an injection nozzle 35 for injecting high-pressure gas, and a second arm device 37 for moving the injection nozzle 35 in three-dimensional directions. The injection nozzle 35 is connected to a gas supply source (not shown) for supplying high-pressure gas.

[0038] As the second arm device 37, a multi-axis (for example, six-axis) robot arm can be used, and the second arm device 37 is attached to the base 17. The injection nozzle 35 is attached to the tip of a second arm device 37, and by operating the second arm device 37, the three-dimensional position of the injection nozzle 35 and the injection direction of the high-pressure gas can be freely set.

[0039] For example, as described below, the injection nozzle 35 can be moved in the same direction as the movement direction of the second modeling nozzle 11B. In addition, by adjusting the inclination of the injection nozzle 35, the direction in which the high-pressure gas is injected can be set to a predetermined inclination (e.g., an inclination inclined by a predetermined angle from the horizontal) as described below.

[0040] The pressure of the high pressure gas may be, for example, more than twice the atmospheric pressure (for example, 0.2 MPa or more in absolute pressure). [1-2. Electrical configuration of manufacturing equipment] Next, the electrical configuration of the manufacturing apparatus 1 will be described.

[0041] As shown in FIG. 2, the manufacturing control device 9 that controls the operation of the manufacturing device 1 includes an arithmetic processing unit 41 that performs various calculations related to the operation of the manufacturing device 1 and the like. The arithmetic processing unit 41 is mainly configured with a microcomputer (hereinafter, a microcomputer) having a CPU 43 and semiconductor memories (hereinafter, a memory 49) such as a ROM 45 and a RAM 47. Note that the arithmetic processing unit 41 may also include an external storage device 51 such as a flash memory or a hard disk.

[0042] Various functions of the arithmetic processing unit 41 are realized by the CPU 43 executing a program stored in a non-transitive real recording medium. In this example, the memory 49 corresponds to the non-transitive real recording medium storing the program. Furthermore, by executing this program, a method corresponding to the program is executed.

[0043] The number of microcomputers constituting the arithmetic processing unit 41 may be one or more. Furthermore, the method of realizing the various functions of the arithmetic processing unit 41 is not limited to software, and some or all of the elements may be realized using one or more pieces of hardware. For example, when the above functions are realized by electronic circuits that are hardware, the electronic circuits may be realized by digital circuits including a large number of logic circuits, or analog circuits, or a combination of these.

[0044] To the manufacturing control device 9, various actuators are connected in order to cause the manufacturing device 1 to perform operations. For example, a first nozzle driver 53, a second nozzle driver 55, a laser driver 57, a first arm driver 59, a gas driver 61, a second arm driver 63, etc. are connected.

[0045] The first nozzle driving unit 53 is a circuit or the like that drives the first modeling nozzle 11A, and although not shown, as is well known, includes a plurality of motors that drive the first modeling nozzle 11A, a heater that melts the resin, etc. Examples of the motors include a motor that drives the Y-axis member 23 in the Z-axis direction, a motor that moves the X-axis member 25 in the Y-axis direction, a motor that drives the first modeling nozzle 11A in the X-axis direction, and a motor that drives a roller that supplies the filament.

[0046] The second nozzle driving unit 55 has a configuration similar to that of the first nozzle driving unit 53, and is a circuit for driving the second object-forming nozzle 11B, etc. Although not shown, the second nozzle driving unit 55 also includes a plurality of motors for driving the second object-forming nozzle 11B, a heater for melting the resin, etc., as is well known.

[0047] The laser driving unit 57 is a circuit or the like for driving the laser irradiation unit 31 to irradiate laser light from the tip of the laser irradiation unit 31. The first arm driving unit 59 is a circuit or the like that drives the first arm device 33.

[0048] The gas driver 61 is a circuit or the like that drives the injection nozzle 35, and controls a valve (not shown) to control the injection state of the high-pressure gas (for example, whether to start or stop injection). Similar to the first arm driving unit 59, the second arm driving unit 63 is a circuit or the like that drives the first arm device 33.

[0049] [1-3. Manufacturing method] Next, a method for producing a resin product carried out using the production apparatus 1 will be described. (First step: manufacturing step of first molded body) In the first step, as shown in FIG. 3A, a first molded body 71 is produced using a first resin by the 3D printer 3 of the manufacturing apparatus 1.

[0050] In detail, first, a filament made of a first resin is supplied to the first modeling nozzle 11A, and the first resin is melted by a heater. The first resin is a resin having laser light absorption properties and has a higher laser light absorption property than the second resin. As the first resin, for example, a thermoplastic resin having a laser light transmittance of 5% or less can be used so that the first resin has a high absorption property for the laser light used. For example, as the thermoplastic resin, for example, a resin such as polyamide or polybutylene terephthalate, or a resin containing such a resin and a colorant such as carbon black or various other additives can be appropriately selected.

[0051] Then, the first modeling nozzle 11A is moved in accordance with modeling data created in advance, and the molten first resin is supplied in a string shape (for example, a cylindrical shape) onto the upper surface of the modeling stage 15 from the tip of the first modeling nozzle 11A.

[0052] Specifically, the first modeling nozzle 11A is moved along a movement direction (e.g., the Y-axis direction) based on the modeling data, and the molten first resin is supplied from the first modeling nozzle 11A in a cylindrical shape. The supplied first resin gradually solidifies, and a cylindrical portion (i.e., a first cylindrical portion) 73 is formed so as to extend along the movement direction.

[0053] Similarly, the first resin is supplied in a cylindrical shape from the first modeling nozzle 11A as the first modeling nozzle 11A moves so as to be adjacent to the formed first cylindrical portion 73, thereby producing another first cylindrical portion 73.

[0054] By repeating such an operation, a first layer 71a is formed in which adjacent first cylindrical portions 73 are joined at an interface K1 of a predetermined width (i.e., a first interface that is an interface made of the same type of resin). That is, a plate-like horizontal portion (i.e., the first layer 71a) in which a plurality of first cylindrical portions 73 are arranged in a planar direction is formed.

[0055] Thereafter, the first columnar portion 73 is laminated in the same manner on the first columnar portion 73 of a part of the first layer 71a (for example, the left end in FIG. 3A) to produce the second layer 71b, and the first columnar portion 73 is laminated in the same manner on the second layer 71b to produce the third layer 71c, and the first columnar portion 73 is laminated in the same manner on the third layer 71c to produce the fourth layer 71d. Note that, for ease of understanding, a single first columnar portion 73 is given as an example for the second layer 71b to the fourth layer 71d here, but the present invention is not limited thereto and may be composed of a plurality of first columnar portions 73.

[0056] Through such operations, a first compact 71 is produced. In detail, as shown in an enlarged view in FIG. 4A, the lower part of the first molded body 71 (i.e., the first layer 71a) has a plate-like shape in which a plurality of first cylindrical portions 73 extending along the movement direction (e.g., the Y-axis direction) are aligned and joined in a direction perpendicular to the movement direction (e.g., the X-axis direction).

[0057] As described above, adjacent first cylindrical portions 73 are in contact with each other at the band-shaped first interface K1. That is, immediately after the first cylindrical portions 73 are formed, the molten first resin is in the process of solidifying and is soft, so adjacent first cylindrical portions 73 are joined at the first interface K1 having a certain width, not at one point. Note that this first interface K1 extends in the direction in which the first cylindrical portions 73 extend, i.e., along the movement direction of the first modeling nozzle 11A (for example, the Y-axis direction).

[0058] An upper end 75 of the first interface K1 of the first cylindrical portion 73 constituting the first layer 71a is exposed on a surface (e.g., the upper surface) of the first molded body 71 and extends in the movement direction along the first interface K1. Furthermore, a recess (i.e., a groove) 77 is formed between adjacent first cylindrical portions 73 along the upper end 75 of the first interface K1, and this groove 77 extends in the movement direction along the end 75 of the first interface K1.

[0059] Similarly, one end 75 on one side (i.e., the right side in FIG. 4A ) of the first interface K1 of the first cylindrical portion 73 disposed perpendicular to the first layer 71a is also exposed to a surface (e.g., the right surface) of the first molded body 71 and extends in the movement direction along the first interface K1. Similarly, a groove 77 is formed between adjacent first cylindrical portions 73 along the end 75 of the first interface K1, and this groove 77 extends in the movement direction along the end 75 of the first interface K1.

[0060] (Second step: production step of second molded body) In the second step, as shown in FIG. 3B, a second molded body 81 is produced on the surface of the first molded body 71 by using a second resin with the 3D printer 3 of the manufacturing apparatus 1.

[0061] In detail, first, a filament made of a second resin is supplied to the second modeling nozzle 11B, and the second resin is melted by a heater. The second resin is a resin having laser light transmittance and has a higher laser light transmittance than the first resin. As the second resin, a thermoplastic resin having a lower laser light transmittance than the first resin, for example, a laser light transmittance of 25% or more, can be used. For example, a resin such as polyamide or polybutylene terephthalate, or a resin containing a clarifying agent or other various additives having sufficiently low laser light absorbance can be appropriately selected.

[0062] Then, the second modeling nozzle 11B is moved in accordance with modeling data created in advance, and the molten second resin is supplied in a string shape (for example, a cylindrical shape) onto the upper surface of the first molded body 71 from the tip of the second modeling nozzle 11B.

[0063] In other words, when the second molded body 81 is stacked on top of the first molded body 71, the second resin is supplied along the end 75 of the first interface K1 of the first molded body 71 in a shape covering the end 75 of the first interface K1 and the groove 77, as shown in an enlarged view in Figure 4B.

[0064] Specifically, similarly to the first modeling nozzle 11A, the second modeling nozzle 11B is moved along a movement direction (e.g., the Y-axis direction) based on the modeling data, and the molten second resin is supplied in a cylindrical shape from the second modeling nozzle 11B. As the supplied second resin gradually solidifies, the cylindrical portion (i.e., the second cylindrical portion) 83 assumes a shape that extends along the movement direction and covers the end portion 75 and the groove 77 of the first interface K1.

[0065] Note that, although the second molded body 81 consisting of one second cylindrical portion 83 is exemplified here, as will be described later, the second molded body 81 consisting of multiple second cylindrical portions 83 may be formed by sequentially forming multiple second cylindrical portions 83, similar to the first molded body 71.

[0066] In addition, in this second step, when the second resin is supplied from the second shaping nozzle 11B to fabricate the second cylindrical portion 83 (i.e., the second molded body 81), high-pressure gas is sprayed from the spray nozzle 35 toward the second cylindrical portion 83.

[0067] The injection direction and injection position of the high-pressure gas are controlled by the second arm device 37 that holds the injection nozzle 35. In other words, since the driving state such as the position of the second modeling nozzle 11B is known, the injection nozzle 35 is moved along the moving direction of the second modeling nozzle 11B while injecting the high-pressure gas from the injection nozzle 35. In other words, the injection nozzle 35 is driven so as to inject the high-pressure gas along the second cylindrical portion 83 that is supplied from the second modeling nozzle 11B and gradually solidifies, that is, toward the soft cylindrical second resin that becomes the second cylindrical portion 83.

[0068] The high-pressure gas can be sprayed in a direction inclined downward at a predetermined angle from the horizontal (e.g., the XY plane) in a plane perpendicular to the second cylindrical portion 83. For example, the spray angle can be in the range of 45°±30° downward from the horizontal (e.g., 45°).

[0069] By using such a jetting direction, the second cylindrical portion 83, which is gradually solidifying, can be pressed toward the boundary portion KB, which is the space surrounded by the cylindrical portions 73, 83 on its periphery. The pressure when the high pressure gas is injected (i.e., the pressure pressing against the surface of the second cylindrical portion 83) can be, for example, more than twice the atmospheric pressure (for example, an absolute pressure of 0.2 MPa or more). In other words, the pressure when the high pressure gas presses against the second cylindrical portion 83 can be a pressure that can push a part of the gradually solidifying second resin into the boundary portion KB, or a pressure that can move or deform the surface of the gradually solidifying second resin toward the pressing side.

[0070] The high pressure gas may be air, nitrogen gas, CO2 gas, or the like. By forming the second molded body 81 on the surface of the first molded body 71 in this manner, a layered body 85 in which the second molded body 81 is layered on the surface of the first molded body 71 can be obtained.

[0071] In the first embodiment, when the second cylindrical portion 83 made of the second resin is produced, high-pressure gas is sprayed onto the second cylindrical portion 83. However, a configuration in which high-pressure gas is not sprayed can also be employed. (Third process: Preparation of welded body) In the third step, as shown in FIG. 3C, the first compact 71 and the second compact 81 are heated with a laser beam to weld them together to produce a welded body 91.

[0072] The welding also includes a process in which the first molded body 71 and the second molded body 81 are integrated together (i.e., made into a resin product) by melting the resin and then lowering the temperature of the resin to solidify it.

[0073] That is, the laser beam is irradiated from the laser irradiation unit 31 along a path from the second molded body 81 side, passing through the irradiation area between the first molded body 71 and the second molded body 81, to the first molded body 71, thereby welding the first molded body 71 and the second molded body 81. The irradiation area is a range to which the laser beam is irradiated. In other words, the irradiation area is a range set so that the laser beam passes between the first molded body 71 and the second molded body 81 when the laser beam is irradiated to the first molded body 71 from the second molded body 81 side.

[0074] The direction and position of the laser light are controlled by a first arm device 33 that holds the laser irradiation unit 31. In other words, since the position of the second molded body 81 (i.e., the second cylindrical portion 83) on the first molded body 71 is known, the laser irradiation unit 31 is moved along the extension direction of the second cylindrical portion 83 while irradiating the laser light from the laser irradiation unit 31.

[0075] 4C, the direction of irradiation of the laser light may be, for example, a direction inclined downward at a predetermined angle from the horizontal (for example, the XY plane) on a plane perpendicular to the second cylindrical portion 83. For example, the irradiation angle may be in the range of 45°±30° downward from the horizontal (for example, 45°).

[0076] The range of irradiation with the laser light, that is, the irradiation region as viewed from the extending direction of the second cylindrical portion 83 (for example, the Y-axis direction), includes a region including an interface K2 where the first cylindrical portion 73 of the first molded body 71 and the second cylindrical portion of the second molded body come into contact (i.e., the second interface which is an interface made of resins with different properties). For example, a pair of second interfaces K2 where a certain second cylindrical portion 83 comes into contact, and a region sandwiched by the pair of second interfaces K2 (for example, a region including a boundary portion KB) are included.

[0077] In this way, when the irradiation region is irradiated with laser light, the laser light passes through the second cylindrical portion 83 made of the second resin having high laser light transmittance, and is absorbed by the first cylindrical portion 73 made of the first resin having high laser light absorbency. This causes the surface temperature of the first cylindrical portion 73 in particular to rise, and the surface of the first cylindrical portion 73 gradually melts.

[0078] Furthermore, the heat of the surface of the first cylindrical portion 73 is transferred to the second cylindrical portion 83 with which it comes into contact via the second interface K2, causing the surface temperature of the second cylindrical portion 83 to rise and gradually melt the surface of the second cylindrical portion 83 as well.

[0079] As a result, the resins of the two cylindrical portions 73, 83 that contact at the second interface K2 melt and mix together, and at the same time, the two molten resins enter the space at the boundary portion KB, mix, and become integrated. Then, when the irradiation of the laser light ends, the temperature of both resins drops, and an integrated compatible portion SB is formed. In other words, the two cylindrical portions 73, 83 are firmly joined and integrated at the second interface K2 and the compatible portion SB. Depending on the amount of both resins that melt, a space may remain at the boundary portion KB.

[0080] In this manner, by irradiating the laser light, more specifically by cooling to room temperature after the laser light irradiation, a welded body 91 can be obtained in which the first molded body 71 and the second molded body 81 are welded together. Note that this welded body 91, i.e., the welded body 91 in which the temperature of the molten portion has dropped and solidified, corresponds to a resin product.

[0081] In the first embodiment, when irradiating the laser beam, high-pressure gas is injected to the second cylindrical portion 83 in the same manner as in the second step. That is, high-pressure gas is injected from the injection nozzle 35 toward the second cylindrical portion 83 while irradiating the laser beam.

[0082] The injection direction and injection position of the high pressure gas can be controlled by the second arm device 37 that holds the injection nozzle 35, and can be the same as those in the second step. When injecting high-pressure gas, an injection direction is adopted that allows the high-pressure gas to be injected at the irradiation position on the irradiation target where the laser light is irradiated (i.e., the irradiation position on the second cylindrical section 32). Specifically, the relationship between the irradiation direction of the laser light and the injection direction of the high-pressure gas may be coaxial, parallel, or at a predetermined angle (i.e., the laser light is irradiated and the high-pressure gas is injected from different directions toward the same position), and among these, it is preferable that the irradiation direction of the laser light and the injection direction of the high-pressure gas are close to the same axis. If they are not coaxial, it is preferable to irradiate the laser light and inject the high-pressure gas as close as possible to each other so that the high-pressure gas can be injected at the position where the laser light is irradiated.

[0083] The high pressure gas is injected simultaneously with the irradiation of the laser light. In other words, the high pressure gas is injected while the laser light is being irradiated. Note that the injection of the high pressure gas may be started before the irradiation of the laser light.

[0084] The pressure at which the high pressure gas is injected is the same as in the second step, but since the second cylindrical portion 83 from which the high pressure gas is injected is in a solidified state, a pressure higher than that in the second step is preferable. That is, by irradiating the laser light, the surfaces of the first molded body 71 and the second molded body 81 melt, and there is a risk of a temporary decrease in the bonding strength between the first molded body 71 and the second molded body 81. Therefore, when the surfaces of the first molded body 71 and the second molded body 81 melt, high-pressure gas is injected so as to press the second cylindrical portion 83 toward the first molded body 71 so that the first molded body 71 and the second molded body 81 do not separate.

[0085] The high-pressure gas may be sprayed from the upper right of FIG. 4C toward the second cylindrical portion 83, as in the case of the irradiation direction of the laser light, or from the back side of the first molded body 71 opposite the second cylindrical portion 83 (for example, the lower left of FIG. 4C). In this case, the gas may be sprayed in parallel (for example, coaxially) from both the front and back sides of the first molded body 71 so as to sandwich the second cylindrical portion 83. The gas may be sprayed from only one of the front and back sides of the first molded body 71.

[0086] In the first embodiment, high pressure gas is injected into the second cylindrical portion 83 when irradiating the laser light, but a configuration in which high pressure gas is not injected can also be employed. [1-4. Control processing] Next, the process performed in the first embodiment will be described with reference to the flowchart of FIG.

[0087] This process is carried out by the calculation processing unit 41. As shown in FIG. 5, in step (hereinafter, S) 100, the 3D printer 3 is driven to output a first resin from the first modeling nozzle 11A, and a first molded body 71 including a plurality of first cylindrical portions 73 is manufactured.

[0088] In the following S110, the 3D printer 3 is driven to output the first resin from the second modeling nozzle 11B onto the surface of the first molded body 71, thereby producing a second molded body 81 consisting of a second cylindrical portion 83. Furthermore, when the second cylindrical portion 83 is produced, the injection nozzle 35 and the second arm device 37 are driven to inject high-pressure gas onto the second cylindrical portion 83.

[0089] In the next step S120, the laser irradiation section 31 and the first arm device 33 are driven to transmit the laser light through the second molded body 81 and irradiate the first molded body 71. At the same time, the injection nozzle 35 and the second arm device 37 are driven to inject high-pressure gas toward the second cylindrical section 83. This causes the first molded body 71 and the second molded body 81 to be welded together, and the process is temporarily terminated.

[0090] [1-5.Effects] According to the first embodiment, the following effects can be obtained. (1a) In this first embodiment, a first molded body 71 is produced using a first resin having laser light absorbency, and a second resin having laser light transmittance is supplied to the surface of the first molded body 71 to produce a second molded body 81 so as to be laminated on the first molded body 71. Then, a laser beam is irradiated along a path from the second molded body 81 side, passing through an irradiation region between the first molded body 71 and the second molded body 81, to the first molded body 71, thereby welding the first molded body 71 and the second molded body 81 together.

[0091] With this configuration, the strength of the resin product manufactured by the fused deposition model 3D printer 3 can be increased. That is, in the first embodiment, the first molded body 71 made of the first resin can be effectively heated by irradiating the laser light along a path from the second molded body 81 side through an irradiation area (for example, an area including the second interface K2) between the first molded body 71 and the second molded body 81 to the first molded body 71. As a result, the surface of the first molded body 71 can be mainly melted. Furthermore, since the second molded body 81 is laminated on the first molded body 71, the heat of the heated first molded body 71 is transferred to the second molded body 81 through the second interface K2 and the like. As a result, the surface of the second molded body 81 can be heated, and the surface of the second molded body 81 can also be melted. In this way, the first molded body 71 and the second molded body 81 can be welded to each other by melting them.

[0092] Then, by welding the first molded body 71 and the second molded body 81 in this manner, a resin product in which the first molded body 71 and the second molded body 81 are firmly joined together is obtained. (1b) In the first embodiment, when the second resin is supplied onto the surface of the first molded body 71, high-pressure gas is sprayed onto the supplied second resin so as to press the second resin towards the first molded body 71.

[0093] This improves the adhesion between the first molded body 71 and the second molded body, which has the advantage of improving the strength of the produced resin product. (1c) In this first embodiment, when welding the first molded body 71 and the second molded body 81 together, high-pressure gas is sprayed onto the surface of the second molded body 81 so as to press the second molded body 81 towards the first molded body 71.

[0094] This improves the adhesion between the first molded body 71 and the second molded body, which has the advantage of improving the strength of the produced resin product. (1d) In this first embodiment, when the second molded body 81 is laminated on the first molded body 71, the second resin is supplied in a shape covering the end portion 75 of the first interface K1 of the first molded body 71 along the end portion 75 of the first interface K1 of the first molded body 71, and when welding is performed, the second molded body 81 is welded to the first molded body 71 in an area that sandwiches the end portion 75 of the first interface K1 of the first molded body 71.

[0095] In other words, in this first embodiment, the second resin is supplied along the end 75 of the first interface K1, which is prone to weakening in strength, and the second molded body 81 is welded to the first molded body 71 in the area that sandwiches the end 75 of the first interface K1 of the first molded body 71, thereby having the advantage of improving the strength of the manufactured resin product.

[0096] [1-6. Correspondence] Next, the relationship between the first embodiment and the present disclosure will be described. The manufacturing apparatus 1 corresponds to a manufacturing apparatus, the 3D printer 3 corresponds to a three-dimensional printer, the laser apparatus 5 corresponds to a laser apparatus, the gas apparatus 7 corresponds to a gas apparatus, the laser irradiation unit 31 corresponds to a laser irradiation unit, the first molded body 71 corresponds to the first molded body, and the second molded body 81 corresponds to the second molded body.

[0097] [1-7. Modifications] <Variation 1> As shown in FIG. 6, in this first modified example, the first molded body 71 has a configuration in which a plurality of first cylindrical portions 73 are stacked, and the second molded body 81 also has a configuration in which a plurality of second cylindrical portions 83 are stacked.

[0098] In this first modified example, when manufacturing a welded body 91 from the stack 85, as in the first embodiment, laser light is irradiated and high-pressure gas is sprayed from the upper left of the figure, where multiple second cylindrical portions 83 are stacked.

[0099] This provides the same effects as those of the first embodiment. <Variation 2> In the first embodiment, the first modeling nozzle 11A that outputs the first resin and the second modeling nozzle 11B that outputs the second resin are used, but a single modeling nozzle may be used.

[0100] For example, after supplying a first resin to the first molding nozzle 11A to produce a first molded body 71, the first resin may be removed from the first molding nozzle 11A, and then a second resin may be supplied to the first molding nozzle 11A to produce a second molded body 81.

[0101] This provides the same effects as those of the first embodiment. <Modification 3> In the first embodiment, the laser irradiation unit 31 and the jet nozzle 35 are attached to the tip of the robot arm, but as shown in FIG. 7, the laser irradiation unit 31 and the jet nozzle 35 may be attached to a modeling nozzle (for example, the second modeling nozzle 11B).

[0102] 7B, the laser irradiation unit 31 and the jet nozzle 35 may be attached to both sides of the second object-forming nozzle 11A in the Y-axis direction. In this case, the second object-forming nozzle 11A may be provided with a rotation shaft 93 extending in the Y-axis direction, and the laser irradiation unit 31 and the jet nozzle 35 may be attached to the rotation shaft 93.

[0103] The laser irradiation unit 31 and the jet nozzle 35 may be rotatable around a rotation axis 93 by a predetermined angle α (for example, any angle downward from the horizontal in FIG. 7A). The angles of the laser irradiation unit 31 and the injection nozzle 35 can be set to any angle by a configuration of a motor, gears, etc. (not shown).

[0104] With this configuration, by moving the second modeling nozzle 11A, which is freely movable in three-dimensional directions, the laser irradiation unit 31 and the injection nozzle 35 can also be moved to any position in the three-dimensional directions.

[0105] Moreover, the irradiation angle of the laser light and the injection direction of the high pressure gas can be set to desired angles by adjusting the rotation angles of the laser irradiation unit 31 and the injection nozzle 35. In addition to attaching the laser irradiation unit 31 and the jet nozzle 35 to the second shaping nozzle 11B, a moving device similar to the moving device 12 (i.e., the moving device that moves the second shaping nozzle 11B) above the second shaping nozzle 11B may be installed on the X-axis member 25, and the laser irradiation unit 31 and the jet nozzle 35 may be attached to this moving device.

[0106] [2. Second embodiment] Since the second embodiment has a basic configuration similar to that of the first embodiment, the following mainly describes the differences from the first embodiment. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is to be referred to.

[0107] In the second embodiment, the method for producing the second molded body 81 is different from that in the first embodiment. As shown in Figure 8, in this second embodiment, a second resin is supplied in a string-like (e.g., cylindrical) shape from a second shaping nozzle 11B to the surface of a first molded body 71 similar to that of the first embodiment, specifically, to the inside (i.e., the side with the smaller angle) of the right-angle bent portion of the first molded body 71.

[0108] At this time, the second resin is supplied so as to straddle the horizontal and vertical portions of the first molded body 71, thereby forming a second columnar portion 83 shaped to straddle the horizontal and vertical portions. In other words, when the second molded body 81 is laminated on the first molded body 71, the second resin is supplied in a shape that spans the ends 75 (i.e., each end 75 of the pair of first interfaces K1) of a first cylindrical portion 73 (i.e., the first cylindrical portion 73 at a corner) to form the second cylindrical portion 83.

[0109] That is, in this second embodiment, the second resin is supplied in a serpentine manner so as to straddle the horizontal and vertical portions of the first molded body 71 multiple times, thereby forming the second cylindrical portion 83 having a shape that straddles the horizontal and vertical portions in a serpentine manner multiple times.

[0110] Furthermore, after forming the second cylindrical portion 83 (i.e., the second molded body 81), as in the first embodiment, laser light is irradiated onto the irradiation area toward the second cylindrical portion 83, and high-pressure gas is sprayed to weld the first molded body 71 and the second molded body 81 together.

[0111] In this second embodiment, when producing the second molded body 81, a second shaping nozzle 11B having a configuration similar to that of the first embodiment can be used, but in order to easily produce the second molded body 81 having a serpentine shape in both the horizontal and vertical directions, a second shaping nozzle 11B whose spray direction can be freely set may also be used.

[0112] For example, as described above, the moving device may be attached to the X-axis member 25, and the second object-forming nozzle 11B may be attached to the moving device so as to be rotatable in a desired direction (for example, so as to be rotatable about the Z-axis and the Y-axis). Note that the second object-forming nozzle 11B can be rotatably driven by a configuration of a motor, gears, etc.

[0113] Separately from this, a second shaping nozzle 11B may be attached to the tip of a robot arm to produce the second cylindrical portion 83 having the above-mentioned meandering shape. The conditions for irradiating the laser light (eg, irradiation direction, irradiation timing, etc.) and the conditions for jetting the high-pressure gas (eg, irradiation direction, jet timing, pressure, etc.) can be the same as those in the first embodiment.

[0114] The second embodiment has the same effects as the first embodiment. Furthermore, in the second embodiment, the second columnar portion 83 is formed so as to straddle the horizontal portion and the vertical portion of the first molded body 71, which has the advantage that the strength of a portion that is likely to be weakened (for example, a portion that bends at a right angle) can be increased.

[0115] [3. Third embodiment] Since the third embodiment has a basic configuration similar to that of the first embodiment, the following description will mainly focus on the differences from the first embodiment. Note that the same reference numerals as those in the first embodiment indicate the same configurations, and the preceding description will be referred to.

[0116] In the third embodiment, separate devices are used for producing the first molded body 71 and the second molded body 81. In this third embodiment, as shown in Figure 9, the manufacturing apparatus 100 includes a molding apparatus 101 having the functions of a fused deposition modeling 3D printer used to produce the first molded body 71, and a lamination apparatus 103 having the functions of a fused deposition modeling 3D printer used to produce the second molded body 81.

[0117] The molding device 101 includes a first molding nozzle 11A similar to that of the first embodiment. Therefore, by outputting a first resin from the first molding nozzle 11A, a first molded body 71 can be manufactured on a first molding stage 15A.

[0118] The lamination device 103 includes a second modeling nozzle 11A, a laser irradiation unit 31, and an injection nozzle 35 similar to those in the first embodiment. Therefore, the first molded body 71 taken out from the molding device 101 is placed on the second modeling stage 15B, and the second resin is output from the second modeling nozzle 11A onto the surface of the first molded body 71, whereby the second molded body 81 can be laminated on the surface of the first molded body 71.

[0119] Moreover, similarly to the first embodiment, the first compact 71 and the second compact 81 can be welded together by irradiating them with laser light and injecting high-pressure gas. The conditions for irradiating the laser light (eg, irradiation direction, irradiation timing, etc.) and the conditions for jetting the high-pressure gas (eg, irradiation direction, jet timing, pressure, etc.) can be the same as those in the first embodiment.

[0120] The third embodiment has the same effects as the first embodiment. Furthermore, in the third embodiment, since separate devices are used for producing the first molded body 71 and the second molded body 81, there is an advantage in that the flexibility of the manufacturing process is increased.

[0121] 5. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0122] (5a) The operation of the manufacturing apparatus described in the present disclosure may be realized by a special purpose computer provided by configuring a processor and memory programmed to perform one or more functions embodied in a computer program.

[0123] Alternatively, the operations of the manufacturing apparatus described in the present disclosure may be implemented by a special purpose computer provided by configuring a processor with one or more special purpose hardware logic circuits.

[0124] Alternatively, the operation of the manufacturing apparatus described in the present disclosure may be realized by one or more dedicated computers configured with a processor and memory programmed to perform one or more functions in combination with a processor configured with one or more hardware logic circuits.

[0125] The computer program may be stored in a computer-readable non-transitory recording medium as instructions to be executed by a computer. The method for realizing the functions of the manufacturing apparatus does not necessarily have to include software, and all of the functions may be realized using one or more pieces of hardware.

[0126] (5b) In addition to the manufacturing apparatus described above, the present disclosure can be realized in various forms, such as a configuration including the manufacturing apparatus as a component, a program for causing a computer in the manufacturing apparatus to function, a non-transient tangible recording medium such as a semiconductor memory on which the program is recorded, and a manufacturing method.

[0127] (5c) Multiple functions possessed by one component in each of the above embodiments may be realized by multiple components, or one function possessed by one component may be realized by multiple components. Also, multiple functions possessed by multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Also, part of the configuration of each of the above embodiments may be omitted. Also, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another embodiment. [Technical idea disclosed in this specification] [Item 1] A method for manufacturing a resin product using a fused deposition modeling three-dimensional printer (3) that supplies molten resin in a string-like form from a modeling nozzle (11) to produce a molded body, comprising the steps of: A first molded body (71) is produced using a first resin having laser light absorbing properties; supplying a second resin having laser light transparency onto a surface of the first molded body to prepare a second molded body (81) so as to be laminated on the first molded body; A laser beam is irradiated along a path from the second molded body side through an irradiation region between the first molded body and the second molded body to the first molded body, thereby welding the first molded body and the second molded body. A method for manufacturing resin products.

[0128] [Item 2] A method for producing a resin product according to item 1, When the second resin is supplied onto the surface of the first molded body, a pressing gas is blown onto the supplied second resin so as to press the second resin toward the first molded body. A method for manufacturing resin products.

[0129] [Item 3] A method for producing a resin product according to item 1 or 2, When the first molded body and the second molded body are welded together, a pressing gas is blown onto the surface of the second molded body so as to press the second molded body against the first molded body and / or so as to press the first molded body against the surface of the first molded body against the second molded body. A method for manufacturing resin products.

[0130] [Item 4] A method for producing a resin product according to any one of items 1 to 3, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, When the second molded body is laminated on the first molded body, the second resin is supplied in a shape spanning an end of the interface of the first molded body, When the welding is performed, the second molded body is welded to the first molded body in a range that sandwiches the end portion of the interface of the first molded body. A method for manufacturing resin products.

[0131] [Item 5] A method for producing a resin product according to any one of items 1 to 3, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, When the second molded body is laminated on the first molded body, the second resin is supplied along an end portion of the interface of the first molded body in a shape that covers the end portion of the interface; When the welding is performed, the second molded body is welded to the first molded body in a range that sandwiches the end portion of the interface of the first molded body. A method for manufacturing resin products.

[0132] [Item 6] A manufacturing device (1) for manufacturing a resin product using a fused deposition modeling three-dimensional printer (3) that supplies molten resin in a string-like form from a modeling nozzle (11) to produce a molded body, The three-dimensional printer includes: a molding control unit (S100) configured to control an operation of the molding nozzle (11A) to supply a first resin having laser light absorbency to produce a first molded body (71); a lamination control unit (S110) configured to control an operation of the shaping nozzle (11B) to supply a second resin having laser light transparency to a surface of the first molded body, thereby producing a second molded body (81) to be laminated on the first molded body; Equipped with The manufacturing apparatus includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light, The laser device includes: and a laser control unit (S120) configured to control the operation of the laser irradiation unit, irradiate the laser light along a path from the second molded body side through an irradiation area between the first molded body and the second molded body to the first molded body, thereby welding the first molded body and the second molded body. Manufacturing equipment for resin products.

[0133] [Item 7] A manufacturing apparatus (100) for manufacturing a resin product using a fused deposition modeling three-dimensional printer that supplies molten resin in a string-like form from a modeling nozzle (11) to produce a molded body, The three-dimensional printer includes: a molding apparatus (101) including a molding control unit (S100) configured to control an operation of the molding nozzle (11A) to supply a first resin having laser light absorbency to produce a first molded body (71); a lamination device (103) including a lamination control unit (S110) configured to control an operation of the shaping nozzle (11B) to supply a second resin having laser light transparency to a surface of the first molded body, thereby producing a second molded body (81) to be laminated on the first molded body; Equipped with The lamination device includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light, The laser device includes: and a laser control unit (S120) configured to control the operation of the laser irradiation unit to irradiate the laser light along a path from the second molded body side through an irradiation area between the first molded body and the second molded body to the first molded body, thereby welding the first molded body and the second molded body. Plastic product manufacturing equipment.

[0134] [Item 8] The manufacturing apparatus for a resin product according to item 6 or 7, The device is used when supplying the second resin to the surface of the first molded body, and includes a gas device (7) that blows a pressing gas onto the supplied second resin so as to press the second resin toward the first molded body. Plastic product manufacturing equipment.

[0135] [Item 9] The manufacturing apparatus for a resin product according to any one of items 6 to 8, An apparatus used when welding the first molded body and the second molded body, the apparatus including a gas device that blows a gas for pressing the second molded body against a surface of the second molded body so as to press the second molded body against the first molded body side and / or so as to press the first molded body against the surface of the first molded body against the second molded body side. Plastic product manufacturing equipment.

[0136] [Item 10] The manufacturing apparatus for a resin product according to any one of items 6 to 9, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, The stacking control unit includes: When the second molded body is laminated on the first molded body, the operation of the molding nozzle is controlled to supply the second resin in a shape spanning an end of the interface of the first molded body, The laser control unit is The operation of the laser irradiation unit is controlled to weld the second molded body to the first molded body in a range that includes an end portion of the interface of the first molded body. Manufacturing equipment for resin products.

[0137] [Item 11] The manufacturing apparatus for a resin product according to any one of items 6 to 9, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, The stacking control unit includes: When the second molded body is laminated on the first molded body, the operation of the molding nozzle is controlled to supply the second resin along an end of the interface of the first molded body in a shape that covers the end of the interface, The laser control unit is When welding the first molded body and the second molded body, the second molded body is welded to the first molded body in a range that includes an end portion of the interface of the first molded body. Manufacturing equipment for resin products. [Explanation of symbols]

[0138] Reference Signs List 1, 100... manufacturing device, 3... 3D printer, 5... laser device, 7... gas device, 11... modeling nozzle, 31... laser irradiation unit, 35... injection nozzle, 33, 35... arm device, 71... first molded body, 81... second molded body, 101... molding device, 103... stacking device

Claims

1. A method for manufacturing a resin product using a fused deposition modeling three-dimensional printer (3) that supplies molten resin in a string-like form from a modeling nozzle (11) to produce a molded body, comprising: A first molded body (71) is produced using a first resin having laser light absorbency; A second resin having laser light transmittance is supplied to a surface of the first molded body to prepare a second molded body (81) so as to be laminated on the first molded body; A laser beam is irradiated along a path from the second molded body side through an irradiation region between the first molded body and the second molded body to the first molded body, thereby welding the first molded body and the second molded body. A method for manufacturing resin products.

2. A method for producing a resin product according to claim 1, When the second resin is supplied onto the surface of the first molded body, a pressing gas is blown onto the supplied second resin so as to press the second resin toward the first molded body. A method for manufacturing resin products.

3. A method for producing a resin product according to claim 1 or 2, When the first molded body and the second molded body are welded together, a pressing gas is blown onto a surface of the second molded body so as to press the second molded body against the first molded body and / or to press the first molded body against the surface of the first molded body. A method for manufacturing resin products.

4. A method for producing a resin product according to claim 1, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, When the second molded body is laminated on the first molded body, the second resin is supplied in a shape spanning an end of the interface of the first molded body, When performing the welding, the second molded body is welded to the first molded body in a range that sandwiches the end portion of the interface of the first molded body. A method for manufacturing resin products.

5. A method for producing a resin product according to claim 1, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, When the second molded body is laminated on the first molded body, the second resin is supplied along an end portion of the interface of the first molded body in a shape that covers the end portion of the interface; When performing the welding, the second molded body is welded to the first molded body in a range that sandwiches the end portion of the interface of the first molded body. A method for manufacturing resin products.

6. A manufacturing device (1) for manufacturing a resin product using a fused deposition modeling three-dimensional printer (3) that supplies molten resin in a string-like form from a modeling nozzle (11) to produce a molded body, The three-dimensional printer includes: A molding control unit (S100) configured to control the operation of the molding nozzle (11A) to supply a first resin having laser light absorbency to produce a first molded body (71); A lamination control unit (S110) configured to control the operation of the shaping nozzle (11B) to supply a second resin having laser light transparency to a surface of the first molded body to produce a second molded body (81) to be laminated on the first molded body; Equipped with The manufacturing apparatus includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light, The laser device includes: A laser control unit (S120) configured to control the operation of the laser irradiation unit, irradiate the laser light along a path from the second molded body side through an irradiation area between the first molded body and the second molded body to the first molded body, and weld the first molded body and the second molded body. Manufacturing equipment for resin products.

7. A manufacturing apparatus (100) for manufacturing a resin product using a fused deposition modeling three-dimensional printer that supplies molten resin in a string-like form from a modeling nozzle (11) to produce a molded body, The three-dimensional printer includes: A molding apparatus (101) including a molding control unit (S100) configured to control the operation of the molding nozzle (11A) to supply a first resin having laser light absorbency to produce a first molded body (71); A lamination device (103) including a lamination control unit (S110) configured to control the operation of the shaping nozzle (11B) to supply a second resin having laser light transparency to a surface of the first molded body to produce a second molded body (81) to be laminated on the first molded body; Equipped with The lamination device includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light, The laser device includes: A laser control unit (S120) configured to control the operation of the laser irradiation unit, irradiate the laser light along a path from the second molded body side through an irradiation area between the first molded body and the second molded body to the first molded body, and weld the first molded body and the second molded body. Manufacturing equipment for resin products.

8. The resin product manufacturing apparatus according to claim 6 or 7, The apparatus is used when supplying the second resin to the surface of the first molded body, and includes a gas device (7) that blows a pressing gas onto the supplied second resin so as to press the second resin toward the first molded body. Manufacturing equipment for resin products.

9. The resin product manufacturing apparatus according to claim 6 or 7, An apparatus used when welding the first molded body and the second molded body, the apparatus including a gas device that blows a gas for pressing the second molded body against a surface of the second molded body so as to press the second molded body against the first molded body side and / or so as to press the first molded body against the surface of the first molded body against the second molded body side. Manufacturing equipment for resin products.

10. The resin product manufacturing apparatus according to claim 6 or 7, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, The stacking control unit includes: When the second molded body is laminated on the first molded body, the operation of the molding nozzle is controlled to supply the second resin in a shape spanning an end of the interface of the first molded body, The laser control unit is The operation of the laser irradiation unit is controlled to weld the second molded body to the first molded body in a range that sandwiches the end of the interface of the first molded body. Manufacturing equipment for resin products.

11. The resin product manufacturing apparatus according to claim 6 or 7, the first molded body has an interface where a plurality of string-like portions made of the first resin are in contact with each other, and an end of the interface is exposed on a surface of the first molded body, The stacking control unit includes: When the second molded body is laminated on the first molded body, the operation of the molding nozzle is controlled to supply the second resin along an end of the interface of the first molded body in a shape that covers the end of the interface, The laser control unit is When welding the first molded body and the second molded body, the second molded body is welded to the first molded body in a range that sandwiches the end of the interface of the first molded body. Manufacturing equipment for resin products.

Images