Method for manufacturing resin products and apparatus for manufacturing resin products

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 technology for manufacturing resin products using a three-dimensional printer. [[Background Art]]

[0002] Conventionally, a technology for manufacturing three-dimensionally shaped resin products using a fused deposition modeling three-dimensional printer (i.e., a 3D printer) (i.e., the FDM method) is known (see, for example, Patent Document 1).

[0003] Specifically, a resin, which is the material of the resin product, is melted at high temperature, the molten resin is discharged in a string shape from a modeling nozzle, and the string-shaped portions are stacked and molded into a three-dimensional shape to manufacture the resin product. [[Prior Art Literature]] [[Patent Literature]]

[0004] [[Patent Document 1]] Japanese Unexamined Patent Application Publication No. 2018-62128 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0005] However, as a result of detailed studies by the inventor, the following problems have been found in conventional technologies. As described above, when an FDM method 3D printer is used to supply resin in a string shape (for example, a cylindrical shape), stack the resin, and mold the resin into a three-dimensional shape, there are few contact interfaces (i.e., bonded portions) between the stacked string-shaped portions. Therefore, the strength at the interface decreases, and as a result, there is a problem that the strength of the resin product decreases.

[0006] In addition, when resin is stacked in a string shape, since the state of the lower string-shaped portion (for example, the degree of solidification) is not constant, the adhesion state of the string-shaped portions is not constant, and from this point of view as well, the strength at the interface, and thus the strength of the resin product, may not be sufficient.

[0007] One aspect of this disclosure is to provide a technology that can increase the strength of resin products manufactured by a fused deposition modeling (FDM) three-dimensional printer. [Means for solving the problem]

[0008] a) One aspect of the present disclosure relates to a manufacturing method for producing a resin product using a fused deposition modeling (FDM) three-dimensional printer (3) that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11).

[0009] In this method for manufacturing resin products, a first molded body (71) is made using a first resin that absorbs laser light, and a second resin that transmits laser light is supplied to the surface of the first molded body to create a second molded body (81) by laminating it onto the first molded body. Then, laser light is irradiated from the second molded body side along a path that passes through the irradiation area between the first and second molded bodies and returns to the first molded body, thereby welding the first and second molded bodies together.

[0010] This configuration makes it possible to increase the strength of resin products manufactured using fused deposition modeling (FDM) 3D printers. In other words, in this disclosure, the first molded body can be effectively heated by irradiating it with laser light from the second molded body side along a path that passes through the irradiation area between the first and second molded bodies and reaches the first molded body. This primarily melts the surface of the first molded body. Furthermore, since the second molded body is laminated on the first molded body, the heat from the heated first molded body is transferred to the second molded body. This heats the surface of the second molded body, and thus melts its surface as well. In this way, the first and second molded bodies can be welded together by melting them.

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

[0012] In this resin product manufacturing apparatus, 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 absorbing properties to produce a first molded body (71), and a lamination control unit (S110) configured to control the operation of the molding nozzle (11B) to supply a second resin having laser light transmitting properties 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 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 and irradiate 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, and to the first molded body, thereby welding the first molded body and the second molded body together.

[0014] This configuration makes it possible to increase the strength of resin products manufactured using fused deposition modeling (FDM) 3D printers. In other words, in this disclosure, the first molded body can be effectively heated by irradiating it with laser light from the second molded body side along a path that passes through the irradiation area between the first and second molded bodies and reaches the first molded body. This primarily melts the surface of the first molded body. Furthermore, since the second molded body is laminated on the first molded body, the heat from the heated first molded body is transferred to the second molded body. This heats the surface of the second molded body, and thus melts its surface as well. In this way, the first and second molded bodies can be welded together by melting them.

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

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

[0017] The lamination 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 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 and reaching the first molded body, thereby welding the first molded body and the second molded body together.

[0018] This configuration makes it possible to increase the strength of resin products manufactured using fused deposition modeling (FDM) 3D printers. That is, according to the present disclosure, the first molded body can be effectively heated by irradiating laser light along a path that passes from the second molded body side through the irradiation region between the first molded body and the second molded body to reach the first molded body. This allows the surface of the first molded body to be mainly melted. Furthermore, since the second molded body is laminated on the first molded body, heat from the heated first molded body is transferred to the second molded body. This allows the surface of the second molded body to be heated, so that the surface of the second molded body can also be melted. In this way, melting the first molded body and the second molded body enables welding of the first molded body and the second molded body.

[0019] Then, with the first molded body and the second molded body welded in this way, a resin product in which the first molded body and the second molded body are firmly bonded can be obtained. Furthermore, the present disclosure includes a molding apparatus and a laminating apparatus, so that the first molded body can be produced by the molding apparatus, and the second molded body can be produced so as to be laminated on the first molded body by the laminating apparatus. Therefore, there is an advantage that the degree of freedom in the manufacturing process is improved.

[0020] In addition, reference numerals in parentheses described in this section and in the claims indicate the correspondence with specific means described in the embodiments hereinafter described 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 the resin product manufacturing apparatus according to the first embodiment, and FIG. 1B is a plan view showing the configuration of a 3D printer used in the resin product manufacturing apparatus. [Figure 2] It is a block diagram showing the electrical configuration of the manufacturing control apparatus and the like according to the first embodiment. [Figure 3] FIGS. 3A, 3B, and 3C are perspective views illustrating the method for manufacturing the resin product according to the first embodiment. [Figure 4] FIGS. 4A, 4B, and 4C are enlarged front views illustrating main parts of the method for manufacturing the resin product according to the first embodiment. [Figure 5]This is a flowchart showing the processes performed by the manufacturing control device of the first embodiment. [Figure 6] This is a perspective view showing the laminate in modified example 1. [Figure 7] Figure 7A is a front view showing the 3rd modified example, which includes a laser irradiation unit and a spray nozzle, and Figure 7B is a top view showing the 3rd modified example, which includes a laser irradiation unit and a spray nozzle. [Figure 8] This is a perspective view showing the manufacturing method of the resin product according to the second embodiment. [Figure 9] This is a front view showing a resin product manufacturing apparatus according to the third embodiment. [Modes for carrying out the invention]

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

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

[0024] The following describes the various components of manufacturing apparatus 1. <3D printer> As shown in Figure 1B, the fused deposition modeling (FDM) 3D printer 3 is, as is well known, equipped with a molding nozzle 11 that extrudes resin from its tip, a moving mechanism 13 that moves the molding nozzle 11 in three dimensions, a molding stage 15 on which the molded body produced by the resin is placed, and a base 17 that supports the molding stage 15, etc. Here, we will explain using the case where two molding nozzles 11A and 11B are used as an example.

[0025] Note that the three-dimensional direction refers to the X, Y, and Z axes of the Cartesian coordinate system, XYZ. The XY plane is the horizontal plane, and the Z axis is the vertical direction. As is well known, the molding nozzle 11 (not shown) includes a through-hole that penetrates in the axial direction and a heater arranged around the through-hole. This molding nozzle 11 is configured to heat and melt a string-like solid resin material, such as a filament, supplied from the outside to the through-hole, and then supply it from the opening at the tip of the through-hole.

[0026] In addition to the method of supplying filament, other methods such as melting resin pellets and outputting them from the molding nozzle 11 can be employed, and there are no particular limitations as long as it is a fused deposition modeling (FDM) system. As the aforementioned moving mechanism 13, a well-known configuration used in 3D printers 3 can be adopted, and here we will describe one such example.

[0027] For example, the moving mechanism 13, in a plan view (see Figure 1B) from the Z-axis direction on the upper surface of the base 17, comprises four Z-axis members 21 which are support columns positioned at the four corners of the base 17 and extending in the Z-axis direction, two columnar Y-axis members (i.e., a pair of left and right Y-axis members) 23 which are horizontally spanned 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 which is horizontally spanned along the X-axis direction between the left and right Y-axis members 23.

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

[0029] Although not shown in the diagram, the movement of the Y-axis member 23 is, as is well known, carried out by a motor or gears and belts that transmit the motor's driving force. The X-axis member 25, sandwiched between a pair of left and right Y-axis members 23, is movable along the surface of the Y-axis members 23 in the Y-axis direction. Although not shown in the figures, the movement of the X-axis member 25 is, as is well known, carried out by a motor or gears and belts that transmit the motor's driving force.

[0030] The two build nozzles (i.e., the first build nozzle 11A and the second build nozzle 11B) are mounted on the X-axis member 23 so as to be movable in the X-axis direction. The movement of each build nozzle 11 is, as is well known, carried out by a motor or gears or belts that transmit the driving force of the motor, although this is not shown in the diagram.

[0031] Here, we have given an example of a 3D printer in which each build nozzle 11 moves in the direction of the X, Y, and Z axes, but any known configuration of a fused deposition modeling (FDM) 3D printer can be adopted. For example, a known configuration can be adopted in which each build nozzle 11 is movable in the Z-axis direction and the Y-axis direction, and the build stage 15 moves in the Y-axis direction. Alternatively, a known configuration can be adopted in which each build nozzle 11 is movable in the X-axis direction and the Y-axis direction, and the build stage 15 moves in the Z-axis direction. Or, as is known, an X-axis member 25 may be placed between a pair of left and right Z-axis members 21, the Z-axis members 21 may be made movable in the Y-axis direction, the X-axis member 25 may be made movable in the Z-axis direction, and each build nozzle 11 may be made movable in the X-axis direction.

[0032] Although the example given here uses two build nozzles 11, it is also possible to use only one build nozzle 11, as will be explained later. <Laser device> As shown in Figure 1A, the laser device 5 includes a laser irradiation unit 31 that emits laser light and a first arm device 33 that moves the laser irradiation unit 31 in a three-dimensional direction.

[0033] The first arm device 33 can be a multi-axis (for example, 6-axis) robot arm, and the first arm device 33 is mounted on the base 17. The laser irradiation unit 31 is attached to the tip of the first arm device 33, and the three-dimensional position of the laser irradiation unit 31 and the direction of laser beam irradiation can be freely set by the operation of the first arm device 33.

[0034] For example, as will be described later, the laser irradiation unit 31 can be moved in the same direction as the movement direction of the second molding nozzle 11B. Furthermore, the tilt of the laser irradiation unit 31 can be adjusted so that the direction in which the laser beam is emitted is set to a predetermined tilt (for example, a tilt angled from the horizontal) as will be described later.

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

[0036] Furthermore, 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 (see, for example, Figure 3), which is the object to be heated by irradiating it with laser light.

[0037] <Gas equipment> As shown in Figure 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 dimensions. The injection nozzle 35 is connected to a gas supply source (not shown) that supplies high-pressure gas.

[0038] The second arm device 37 can be a multi-axis (for example, 6-axis) robot arm, and the second arm device 37 is attached to the base 17. The injection nozzle 35 is attached to the tip of the second arm device 37, and the three-dimensional position of the injection nozzle 35 and the direction of injection of high-pressure gas can be freely set by the operation of the second arm device 37.

[0039] For example, as will be described later, the injection nozzle 35 can be moved in the same direction as the movement direction of the second molding nozzle 11B. Furthermore, the inclination of the injection nozzle 35 can be adjusted so that the direction in which the high-pressure gas is injected is set to a predetermined inclination (for example, an inclination at a predetermined angle from the horizontal), as will be described later.

[0040] Furthermore, the pressure of the high-pressure gas can be set to, for example, more than twice the atmospheric pressure (for example, 0.2 MPa or higher in absolute pressure). [1-2. Electrical Configuration of Manufacturing Equipment] Next, we will explain the electrical configuration of manufacturing apparatus 1.

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

[0042] The various functions of the arithmetic processing unit 41 are realized by the CPU 43 executing a program stored in a non-transitional substantial recording medium. In this example, memory 49 corresponds to the non-transitional substantial recording medium that stores the program. Furthermore, when this program is executed, the method corresponding to the program is executed.

[0043] The number of microcontrollers constituting the arithmetic processing unit 41 may be one or more. Furthermore, the method for realizing the various functions of the arithmetic processing unit 41 is not limited to software; some or all of its elements may be realized using one or more hardware components. For example, if the above functions are realized by an electronic circuit, which is hardware, that electronic circuit may be a digital circuit containing many logic circuits, an analog circuit, or a combination thereof.

[0044] Various actuators are connected to the manufacturing control device 9 in order to perform the operations of the manufacturing device 1. For example, the first nozzle drive unit 53, the second nozzle drive unit 55, the laser drive unit 57, the first arm drive unit 59, the gas drive unit 61, the second arm drive unit 63, etc., are connected.

[0045] The first nozzle drive unit 53 is a circuit for driving the first molding nozzle 11A, and although not shown in the figure, it is well known to include multiple motors for driving the first molding nozzle 11A and a heater for melting the resin. Examples of motors include a motor for driving the Y-axis member 23 in the Z-axis direction, a motor for moving the X-axis member 25 in the Y-axis direction, a motor for driving the first molding nozzle 11A in the X-axis direction, and a motor for driving the roller that supplies the filament.

[0046] The second nozzle drive unit 55 has a similar configuration to the first nozzle drive unit 53 and includes a circuit for driving the second molding nozzle 11B. Although not shown in the figures, the second nozzle drive unit 55 also includes, as is well known, multiple motors for driving the second molding nozzle 11B and a heater for melting the resin.

[0047] The laser drive unit 57 is a circuit, etc., that drives the laser irradiation unit 31 to irradiate laser light from the tip of the laser irradiation unit 31. The first arm drive unit 59 is a circuit, etc., that drives the first arm device 33.

[0048] The gas drive unit 61 is a circuit that drives the injection nozzle 35 and controls the injection state of the high-pressure gas (for example, initiating or stopping injection) by controlling a valve (not shown). The second arm drive unit 63 is a circuit, etc., that drives the first arm device 33, similar to the first arm drive unit 59.

[0049] [1-3. Manufacturing method] Next, a method for manufacturing resin products using the manufacturing apparatus 1 will be described. (Step 1: Process for manufacturing the first molded body) In the first step, as shown in Figure 3A, a first molded body 71 is produced using the first resin by the 3D printer 3 of the manufacturing apparatus 1.

[0050] In more detail, first, a filament made of the first resin is supplied to the first molding nozzle 11A, and the first resin is melted by a heater. The first resin is a resin that absorbs laser light, and its absorption of laser light is higher than that of the second resin. As the first resin, a thermoplastic resin with a laser light transmittance of 5% or less can be used to ensure high absorption of the laser light used. For example, as the thermoplastic resin, resins such as polyamide and polybutylene terephthalate, or resins such as these that have been blended with colorants such as carbon black or other various additives can be appropriately selected.

[0051] Then, the first molding nozzle 11A is moved according to the pre-created molding data, and molten first resin is supplied from the tip of the first molding nozzle 11A to the upper surface of the molding stage 15 in a string-like form (for example, a cylindrical form).

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

[0053] Similarly, another first cylindrical portion 73 is produced by supplying the first resin in a cylindrical shape from the first molding nozzle 11A as the first molding nozzle 11A moves, so as to be adjacent to the formed first cylindrical portion 73.

[0054] By repeating this process, 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 made of the same type of resin). In other words, a plate-like horizontal portion (i.e., the first layer 71a, which is the first layer) is formed in which multiple first cylindrical portions 73 are arranged in the planar direction.

[0055] Subsequently, a second layer 71b is created by stacking a first cylindrical portion 73 on a part of the first layer 71a (for example, the left end in Figure 3A) in the same manner. Then, a third layer 71c is created by stacking a first cylindrical portion 73 on the second layer 71b in the same manner. Finally, a fourth layer 71d is created by stacking a first cylindrical portion 73 on the third layer 71c in the same manner. For the sake of ease of understanding, a single first cylindrical portion 73 is used as an example for the second to fourth layers 71b and 71d, but the method is not limited to this, and multiple first cylindrical portions 73 may be used.

[0056] The first molded body 71 is produced by this operation. More specifically, as shown in an enlarged view in Figure 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 direction of movement (e.g., the Y-axis direction) are arranged and joined together in a direction perpendicular to the direction of movement (e.g., the X-axis direction).

[0057] As described above, adjacent first cylindrical portions 73 are in contact with each other at a strip-shaped first interface K1. In other words, immediately after the formation of the first cylindrical portions 73, the molten first resin is still in the solidification stage and is soft, so adjacent first cylindrical portions 73 are joined not at a single point, but at a first interface K1 with a certain width. This first interface K1 extends in the direction in which the first cylindrical portions 73 extend, that is, along the direction of movement of the first molding nozzle 11A (for example, the Y-axis direction).

[0058] The upper end 75 of the first cylindrical portion 73 constituting the first layer 71a is exposed to the surface of the first molded body 71 (for example, the upper surface) and extends along the first interface K1 in the direction of movement. Furthermore, a recess (i.e., 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 along the end 75 of the first interface K1 in the direction of movement.

[0059] Similarly, one end 75 on one side of the first interface K1 of the first cylindrical portion 73, which is positioned perpendicular to the first layer 71a (i.e., the right side in Figure 4A), is also exposed to the surface of the first molded body 71 (for example, the right surface) and extends along the first interface K1 in the direction of movement. Furthermore, 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 along the end 75 of the first interface K1 in the direction of movement.

[0060] (Second step: Second molded product manufacturing process) In the second step, as shown in Figure 3B, the 3D printer 3 of the manufacturing apparatus 1 is used to create a second molded body 81 on the surface of the first molded body 71 using the second resin.

[0061] In more detail, first, a filament made of the second resin is supplied to the second molding nozzle 11B, and the second resin is melted by a heater. The second resin is a resin that transmits laser light, and has higher laser light transmittance than the first resin. As the second resin, a thermoplastic resin is used that has lower absorption of the laser light used than the first resin, for example, a laser light transmittance of 25% or more. For example, resins such as polyamide and polybutylene terephthalate, or resins such as these that have been blended with a clearing agent or other various additives that have sufficiently low absorption of the laser light used, can be appropriately selected.

[0062] Then, the second molding nozzle 11B is moved according to the pre-created molding data, and the molten second resin is supplied from the tip of the second molding nozzle 11B to the upper surface of the first molded body 71 in a string-like (for example, cylindrical) form.

[0063] In other words, when laminating the second molded body 81 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 that covers the end 75 and groove 77 of the first interface K1, as shown in an enlarged view in Figure 4B.

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

[0065] In this example, a second molded body 81 consisting of a single second cylindrical portion 83 is shown. However, as will be described later, a 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] Furthermore, in this second step, when supplying the second resin from the second molding nozzle 11B to produce the second cylindrical portion 83 (i.e., the second molded body 81), high-pressure gas is injected from the injection nozzle 35 toward the second cylindrical portion 83.

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

[0068] The direction of injection of the high-pressure gas can be, for example, 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 injection angle can be in a range of 45° ± 30° downward from the horizontal (e.g., 45°).

[0069] By using this injection direction, the gradually solidifying second cylindrical portion 83 can be pressed toward the boundary portion KB, which is the space surrounded by the cylindrical portions 73 and 83. The pressure used when injecting the high-pressure gas (i.e., the pressure pressing against the surface of the second cylindrical portion 83) can be, for example, twice or more atmospheric pressure (for example, 0.2 MPa or more in absolute pressure). In other words, the pressure applied when the high-pressure gas presses against the second cylindrical portion 83 can be such that it is possible to push a portion of the gradually solidifying second resin into the boundary portion KB, or to move or deform the surface of the gradually solidifying second resin towards the pressing side.

[0070] High-pressure gases such as air, nitrogen gas, and CO2 gas can be used. In this way, by forming the second molded body 81 on the surface of the first molded body 71, a laminate 85 can be obtained in which the second molded body 81 is laminated on the surface of the first molded body 71.

[0071] In this first embodiment, high-pressure gas was injected into the second cylindrical portion 83, which is made of the second resin, but a configuration in which high-pressure gas is not injected can also be adopted. (Step 3: Fabrication of the welded body) In the third step, as shown in Figure 3C, the first molded body 71 and the second molded body 81 are welded together by heating with laser light to produce a welded body 91.

[0072] Furthermore, the aforementioned welding also includes a method of integrating the first molded body 71 and the second molded body 81 (i.e., forming a resin product) by melting the resin and then lowering its temperature to solidify it.

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

[0074] The direction and position of the laser beam irradiation are controlled by the 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 direction in which the second cylindrical portion 83 extends, while irradiating it with laser light.

[0075] As shown in an enlarged view in Figure 4C, the direction of laser beam irradiation can be, for example, a plane perpendicular to the second cylindrical portion 83, and inclined downward at a predetermined angle from the horizontal (e.g., the XY plane). For example, the irradiation angle can be in a range of 45° ± 30° downward from the horizontal (e.g., 45°).

[0076] The area to which the laser light is irradiated, that is, the irradiation region as viewed from the direction in which the second cylindrical portion 83 extends (for example, the Y-axis direction), includes the region that includes the 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, this includes a pair of second interfaces K2 that a certain second cylindrical portion 83 is in contact with, and the region sandwiched between the pair of second interfaces K2 (for example, the region including the boundary portion KB).

[0077] In this way, when laser light is irradiated onto the irradiation area, the laser light passes through the second cylindrical portion 83 made of the second resin, which has high laser light transmittance, and is absorbed by the first cylindrical portion 73 made of the first resin, which has high laser light absorbance. As a result, the surface temperature of the first cylindrical portion 73 rises in particular, and the surface of the first cylindrical portion 73 gradually melts.

[0078] Furthermore, the heat from the surface of the first cylindrical portion 73 is transferred to the second cylindrical portion 83, which is in contact with it via the second interface K2. As a result, the surface temperature of the second cylindrical portion 83 rises, and the surface of the second cylindrical portion 83 also gradually melts.

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

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

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

[0082] The injection direction and injection position of the high-pressure gas can be controlled under the same conditions as in the second step, and are controlled by the second arm device 37 that holds the injection nozzle 35. When injecting high-pressure gas, the injection direction is adopted such that the high-pressure gas can be injected at the irradiation position on the target being irradiated by the laser beam (i.e., the irradiation position on the second cylindrical portion 32). Specifically, the relationship between the laser beam irradiation direction and the high-pressure gas injection direction can be coaxial, parallel, or at a predetermined angle (i.e., the laser beam irradiation and high-pressure gas injection are performed from different directions toward the same position). Of these, it is preferable that the laser beam irradiation direction and the high-pressure gas injection direction are as close to coaxial as possible. If they are not coaxial, it is preferable to perform the laser beam irradiation and high-pressure gas injection as close together as possible so that the high-pressure gas can be injected at the position where the laser beam is irradiated.

[0083] Furthermore, the injection of high-pressure gas is performed simultaneously with the irradiation of the laser beam. In other words, high-pressure gas is injected while the laser beam is being irradiated. However, the injection of high-pressure gas may be started before the irradiation of the laser beam.

[0084] The pressure during injection of the high-pressure gas is the same as in the second step, but since the second cylindrical part 83 from which the high-pressure gas is injected is in a solidified state, a higher pressure than that in the second step is preferable. In other words, irradiating with laser light causes the surfaces of the first molded body 71 and the second molded body 81 to melt, which may temporarily reduce 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 to press the second cylindrical portion 83 toward the first molded body 71 in order to prevent the first molded body 71 and the second molded body 81 from separating.

[0085] Regarding the direction of injection of the high-pressure gas, similar to the irradiation direction of the laser beam, it is possible to spray it toward the second cylindrical portion 83, for example, from the upper right of Figure 4C, or to spray it from the back side of the first molded body 71 opposite to the second cylindrical portion 83 (for example, the lower left of Figure 4C). In this case, the gas may be sprayed parallel to both the front and back sides of the first molded body 71 (for example, coaxially) so as to sandwich the second cylindrical portion 83. It is also possible to spray from only one of the front or back sides of the first molded body 71.

[0086] In this first embodiment, high-pressure gas was injected into the second cylindrical portion 83 when irradiating with laser light, but a configuration in which high-pressure gas is not injected can also be adopted. [1-4. Control Processing] Next, the process performed in this first embodiment will be explained based on the flowchart in Figure 5.

[0087] This process is performed by the arithmetic processing unit 41. As shown in Figure 5, in step (hereinafter referred to as S) 100, the 3D printer 3 is driven and the first resin is output from the first molding nozzle 11A to produce a first molded body 71 consisting of multiple first cylindrical parts 73.

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

[0089] In the subsequent S120, the laser irradiation unit 31 and the first arm device 33 are driven to irradiate the first molded body 71 with laser light that passes through the second molded body 81. At the same time, the injection nozzle 35 and the second arm device 37 are driven to inject high-pressure gas onto the second cylindrical part 83. This welds the first molded body 71 and the second molded body 81 together, and the process is temporarily terminated.

[0090] [1-5. Effects] According to this first embodiment, the following effects can be obtained. (1a) In this first embodiment, a first molded body 71 is made using a first resin having laser light absorbing properties, and a second resin having laser light transmitting properties is supplied to the surface of the first molded body 71 to make a second molded body 81 by laminating it on the first molded body 71. Then, laser light is irradiated from the second molded body 81 side along a path that passes through the irradiation area between the first molded body 71 and the second molded body 81 and reaches the first molded body 71, thereby welding the first molded body 71 and the second molded body 81 together.

[0091] This configuration makes it possible to increase the strength of resin products manufactured by a fused deposition modeling (FDM) 3D printer. In other words, in this first embodiment, the first molded body 71 made of the first resin can be effectively heated by irradiating the first molded body 71 with laser light 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 (for example, the area including the second interface K2) and reaching the first molded body 71. This primarily melts the surface of the first molded body 71. Furthermore, since the second molded body 81 is laminated on the first molded body 71, the heat from the heated first molded body 71 is transferred to the second molded body 81 via the second interface K2, etc. This heats the surface of the second molded body 81, and thus melts its surface as well. In this way, the first molded body 71 and the second molded body 81 can be welded together by melting them.

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

[0093] This improves the adhesion between the first molded body 71 and the second molded body, resulting in the advantage of increased strength in the manufactured resin product. (1c) In this first embodiment, when welding the first molded body 71 and the second molded body 81, a high-pressure gas is blown onto the surface of the second molded body 81 so as to press the second molded body 81 toward the first molded body 71.

[0094] This improves the adhesion between the first molded body 71 and the second molded body, resulting in the advantage of increased strength in the manufactured resin product. (1d) In this first embodiment, when laminating the second molded body 81 onto the first molded body 71, the second resin is supplied in a shape that covers the end 75 of the first interface K1 of the first molded body 71 along the end 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 the range that sandwiches the end 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 strength reduction, and the second molded body 81 is welded to the first molded body 71 in the area that straddles the end 75 of the first interface K1 of the first molded body 71. This has the advantage of improving the strength of the manufactured resin product.

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

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

[0098] In this modified example 1, when manufacturing the welded body 91 from the laminate 85, a laser beam is irradiated from the upper left of the figure, where multiple second cylindrical portions 83 are stacked, and high-pressure gas is injected, similar to the first embodiment.

[0099] This provides the same effects as the first embodiment described above. <Modification 2> In the first embodiment described above, a first molding nozzle 11A for outputting the first resin and a second molding nozzle 11B for outputting the second resin were used, but a single molding nozzle may be used.

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

[0101] This provides the same effects as the first embodiment described above. <Variation 3> In the first embodiment described above, the laser irradiation unit 31 and the injection nozzle 35 were attached to the tip of the robot arm, but as shown in Figure 7, the laser irradiation unit 31 and the injection nozzle 35 may also be attached to the molding nozzle (for example, the second molding nozzle 11B).

[0102] For example, as shown in Figure 7B, a laser irradiation unit 31 and an injection nozzle 35 may be attached to both sides of the second molding nozzle 11A in the Y-axis direction. In this case, a pivot shaft 93 extending in the Y-axis direction may be provided on the second molding nozzle 11A, and the laser irradiation unit 31 and the injection nozzle 35 may be attached to this pivot shaft 93.

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

[0104] With this configuration, by moving the second molding nozzle 11A, which can move freely in three dimensions, the laser irradiation unit 31 and the injection nozzle 35 can also be moved to any position in three dimensions.

[0105] Furthermore, the irradiation angle of the laser beam 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 injection nozzle 35 to the second molding nozzle 11B, a similar moving device to the upper moving device (i.e., the moving device for moving the second molding nozzle 11B) 12 may be installed on the X-axis member 25, and the laser irradiation unit 31 and the injection nozzle 35 may be attached to this moving device.

[0106] [2. Second Embodiment] Since the basic configuration of the second embodiment is the same as that of the first embodiment, the differences from the first embodiment will be described below. Reference numerals that are the same as those in the first embodiment indicate the same components, and refer to the preceding description.

[0107] In this second embodiment, the method for manufacturing the second molded body 81 differs from that of the first embodiment. As shown in Figure 8, in this second embodiment, the second resin is supplied from the second molding nozzle 11B in a string-like (for example, cylindrical) form to the surface of the first molded body 71, similar to the first embodiment, more specifically, to the inside of the right-angled portion of the first molded body 71 (i.e., the side with the smaller angle).

[0108] At this time, the second resin is supplied so as to span the horizontal portion and the vertical portion of the first molded body 71 to form the second cylindrical portion 83 which has a shape that spans the horizontal portion and the vertical portion. In other words, when laminating the second molded body 81 onto the first molded body 71, the second resin is supplied in a shape that straddles the ends 75 of a pair of first interfaces K1 of a certain first cylindrical portion 73 (i.e., the first cylindrical portion 73 at a corner) to form the second cylindrical portion 83.

[0109] In other words, in this second embodiment, the second resin is supplied in a meandering manner so as to cross the horizontal and vertical portions of the first molded body 71 multiple times, thereby forming a second cylindrical portion 83 that has a shape that crosses the horizontal and vertical portions in a meandering manner many times.

[0110] Furthermore, after forming the second cylindrical portion 83 (i.e., the second molded body 81), the first molded body 71 and the second molded body 81 are welded together by irradiating the irradiation area with laser light toward the second cylindrical portion 83 and spraying high-pressure gas, similar to the first embodiment.

[0111] In this second embodiment, when manufacturing the second molded body 81, a second molding nozzle 11B with the same configuration as in the first embodiment can be used. However, in order to easily manufacture a second molded body 81 with a meandering shape in both the horizontal and vertical directions, a second molding nozzle 11B whose spray direction can be freely set may be used.

[0112] For example, as described above, the moving device may be attached to the X-axis member 25, and the second molding nozzle 11B may be attached to this moving device so as to be rotatable in a desired direction (for example, so as to be rotatable around the Z-axis and Y-axis as centers of rotation). The second molding nozzle 11B can be driven to rotate by a motor and gear configuration, etc.

[0113] Alternatively, a second molding nozzle 11B may be attached to the tip of the robot arm to create the second cylindrical section 83 with the meandering shape described above. Furthermore, the same conditions as in the first embodiment can be adopted for the laser light irradiation conditions (e.g., irradiation direction and irradiation timing, etc.) and the high-pressure gas injection conditions (e.g., irradiation direction, injection timing and pressure, etc.).

[0114] This second embodiment provides the same effects as the first embodiment. Furthermore, in this second embodiment, since the second cylindrical portion 83 is formed so as to straddle the horizontal portion and the vertical portion of the first molded body 71, there is an advantage in that the strength of parts that tend to decrease (for example, parts that bend at a right angle) can be increased.

[0115] [3. Third Embodiment] Since the basic configuration of the third embodiment is the same as that of the first embodiment, the differences from the first embodiment will be described below. Reference numerals that are the same as those in the first embodiment indicate the same components, and refer to the preceding description.

[0116] In this third embodiment, separate apparatuses are used for the production of 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 that has the function of a fused deposition modeling (FDM) 3D printer used for manufacturing the first molded body 71, and a deposition apparatus 103 that has the function of a fused deposition modeling (FDM) 3D printer used for manufacturing the second molded body 81.

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

[0118] The additive manufacturing apparatus 103 is equipped with a second molding nozzle 11A, a laser irradiation unit 31, and an injection nozzle 35, similar to those in the first embodiment. Therefore, by placing the first molded body 71 removed from the molding apparatus 101 onto the second molding stage 15B and outputting the second resin from the second molding nozzle 11A onto the surface of the first molded body 71, the second molded body 81 can be laminated onto the surface of the first molded body 71.

[0119] Furthermore, similar to the first embodiment, the first molded body 71 and the second molded body 81 can be welded together by irradiating them with laser light and injecting high-pressure gas. Furthermore, the same conditions as in the first embodiment can be adopted for the laser light irradiation conditions (e.g., irradiation direction and irradiation timing, etc.) and the high-pressure gas injection conditions (e.g., irradiation direction, injection timing and pressure, etc.).

[0120] This third embodiment provides the same effects as the first embodiment. Furthermore, in this third embodiment, separate devices are used for the production of the first molded body 71 and the second molded body 81, which has the advantage of increasing the flexibility of the manufacturing process.

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

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

[0123] Alternatively, the operation of the manufacturing apparatus described herein may be realized by a dedicated computer provided by configuring a processor with one or more dedicated hardware logic circuits.

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

[0125] Furthermore, the computer program may be stored on a computer-readable, non-transitional tangible recording medium as instructions executed by the computer. The method for realizing the functions of the manufacturing apparatus does not necessarily need to include software; all of its functions may be realized using one or more hardware components.

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

[0127] (5c) Multiple functions of one component in each of the above embodiments may be realized by multiple components, or one function of one component may be realized by multiple components. Also, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Furthermore, some of the configurations of each of the above embodiments may be omitted. Furthermore, at least some of the configurations of each of the above embodiments may be added to or replaced with the configurations of other embodiments. [Technical concepts disclosed in this specification] [Item 1] A manufacturing method for producing resin products using a fused deposition modeling (FDM) three-dimensional printer (3) that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11), A first molded body (71) is prepared using a first resin having laser light absorption properties. A second resin having laser light transmittance is supplied to the surface of the first molded body to produce a second molded body (81) by laminating it onto the first molded body. Laser light is irradiated from the second molded body side along a path that passes through the irradiation area between the first molded body and the second molded body and reaches the first molded body, thereby welding the first molded body and the second molded body together. A method for manufacturing resin products.

[0128] [Item 2] A method for manufacturing resin products as described in item 1, When supplying the second resin to 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 manufacturing a resin product as described in item 1 or item 2, When welding the first molded body and the second molded body, a pressing gas is blown onto the surface of the second molded body so as to press the second molded body toward the first molded body, and / or so as to press the first molded body toward the second molded body toward the surface of the first molded body. A method for manufacturing resin products.

[0130] [Item 4] A method for manufacturing a resin product as described in any one of items 1 to 3, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. When the second molded body is laminated onto the first molded body, the second resin is supplied in a shape that straddles the edge of the interface of the first molded body. When performing the welding described above, the second molded body is welded to the first molded body in the area that encloses the end of the interface of the first molded body. A method for manufacturing resin products.

[0131] [Item 5] A method for manufacturing a resin product as described in any one of items 1 to 3, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. When laminating the second molded body onto the first molded body, the second resin is supplied along the edge of the interface of the first molded body in a shape that covers the edge of the interface. When performing the welding described above, the second molded body is welded to the first molded body in the area that encloses the end of the interface of the first molded body. A method for manufacturing resin products.

[0132] [Item 6] A manufacturing apparatus (1) for manufacturing resin products using a fused deposition modeling (FDM) three-dimensional printer (3) that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11), The aforementioned three-dimensional printer is A molding control unit (S100) is configured to control the operation of the molding nozzle (11A) and supply a first resin having laser light absorption properties to produce a first molded body (71), A lamination control unit (S110) is configured to control the operation of the molding nozzle (11B) to supply a second resin having laser light transmittance to the surface of the first molded body and to produce a second molded body (81) to be laminated onto 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 is The system includes 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, through the irradiation area between the first molded body and the second molded body, and to the first molded body, thereby welding the first molded body and the second molded body together. Manufacturing equipment for resin products.

[0133] [Item 7] A manufacturing apparatus (100) for manufacturing resin products using a fused deposition modeling (FDM) three-dimensional printer that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11), As the aforementioned three-dimensional printer, A molding apparatus (101) is provided with a molding control unit (S100) configured to control the operation of the molding nozzle (11A) and supply a first resin having laser light absorption properties to produce a first molded body (71), A lamination apparatus (103) is provided with a lamination control unit (S110) configured to control the operation of the molding nozzle (11B) and 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, Equipped with, The stacking apparatus includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light, The laser device is The system includes 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, through the irradiation area between the first molded body and the second molded body, and to the first molded body, thereby welding the first molded body and the second molded body together. Manufacturing equipment for resin products.

[0134] [Item 8] A manufacturing apparatus for resin products as described in item 6 or item 7, An apparatus used for supplying the second resin to the surface of the first molded body, comprising 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.

[0135] [Item 9] A manufacturing apparatus for resin products as described in any one of items 6 through 8, An apparatus used for welding the first molded body and the second molded body, comprising a gas device that blows a pressing gas so as to press the second molded body toward the first molded body toward the surface of the second molded body, and / or so as to press the first molded body toward the second molded body toward the surface of the first molded body, Manufacturing equipment for resin products.

[0136] [Item 10] A manufacturing apparatus for resin products as described in any one of items 6 through 9, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. The stacking control unit is When the second molded body is laminated onto the first molded body, the operation of the molding nozzle is controlled to supply the second resin in a shape that spans the edge of the interface of the first molded body. The laser control unit, The operation of the laser irradiation unit is controlled to weld the second molded body to the first molded body in the area encompassing the edge of the interface of the first molded body, Manufacturing equipment for resin products.

[0137] [Item 11] A manufacturing apparatus for resin products as described in any one of items 6 through 9, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. The stacking control unit is When the second molded body is laminated onto the first molded body, the operation of the molding nozzle is controlled to supply the second resin along the edge of the interface of the first molded body in a shape that covers the edge of the interface. The laser control unit, When welding the first molded body and the second molded body, the second molded body is configured to be welded to the first molded body in a range that encloses the end of the interface of the first molded body. Manufacturing equipment for resin products. [Explanation of Symbols]

[0138] 1, 100…Manufacturing equipment, 3…3D printer, 5…Laser device, 7…Gas device, 11…Building nozzle, 31…Laser irradiation unit, 35…Injection nozzle, 33, 35…Arm device, 71…First molded body, 81…Second molded body, 101…Molding device, 103…Layering device

Claims

1. A manufacturing method for producing resin products using a fused deposition modeling (FDM) three-dimensional printer (3) that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11), A first molded body (71) is made using a first resin having laser light absorption properties. A second resin having laser light transmittance is supplied to the surface of the first molded body to produce a second molded body (81) by laminating it onto the first molded body. Laser light is irradiated from the second molded body side along a path that passes through the irradiation area between the first molded body and the second molded body and reaches the first molded body, thereby welding the first molded body and the second molded body together. A method for manufacturing resin products.

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

4. A method for manufacturing a resin product according to claim 1, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. When the second molded body is laminated onto the first molded body, the second resin is supplied in a shape that straddles the end of the interface of the first molded body. When performing the welding described above, the second molded body is welded to the first molded body in the area that encloses the end of the interface of the first molded body. A method for manufacturing resin products.

5. A method for manufacturing a resin product according to claim 1, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. When the second molded body is laminated onto the first molded body, the second resin is supplied along the edge of the interface of the first molded body in a shape that covers the edge of the interface. When performing the welding described above, the second molded body is welded to the first molded body in the area that encloses the end of the interface of the first molded body. A method for manufacturing resin products.

6. A manufacturing apparatus (1) for manufacturing resin products using a fused deposition modeling (FDM) three-dimensional printer (3) that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11), The aforementioned three-dimensional printer is A molding control unit (S100) is configured to control the operation of the molding nozzle (11A) and supply a first resin having laser light absorbing properties to produce a first molded body (71), A lamination control unit (S110) is configured to control the operation of the molding nozzle (11B) to supply a second resin having laser light transmittance to the surface of the first molded body and to produce a second molded body (81) to be laminated onto 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 is The system includes 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, 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 together. Manufacturing equipment for resin products.

7. A manufacturing apparatus (100) for manufacturing resin products using a fused deposition modeling (FDM) three-dimensional printer that produces a molded body by supplying molten resin in a string-like manner from a molding nozzle (11), As the aforementioned three-dimensional printer, A molding apparatus (101) is provided with a molding control unit (S100) configured to control the operation of the molding nozzle (11A) and supply a first resin having laser light absorbing properties to produce a first molded body (71), A lamination apparatus (103) is provided with a lamination control unit (S110) configured to control the operation of the molding nozzle (11B) and 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, Equipped with, The stacking apparatus includes a laser device (5) having a laser irradiation unit (31) that irradiates laser light, The laser device is The system includes 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, 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 together. Manufacturing equipment for resin products.

8. A manufacturing apparatus for resin products according to claim 6 or claim 7, An apparatus used when supplying the second resin to the surface of the first molded body, comprising 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. A manufacturing apparatus for resin products according to claim 6 or claim 7, An apparatus used for welding the first molded body and the second molded body, comprising a gas device that blows a pressing gas so as to press the second molded body toward the first molded body toward the surface of the second molded body, and / or so as to press the first molded body toward the second molded body toward the surface of the first molded body, Manufacturing equipment for resin products.

10. A manufacturing apparatus for resin products according to claim 6 or claim 7, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. The stacking control unit is When the second molded body is laminated onto the first molded body, the operation of the molding nozzle is controlled to supply the second resin in a shape that spans the edge of the interface of the first molded body. The laser control unit, The operation of the laser irradiation unit is controlled to weld the second molded body to the first molded body in the area encompassing the edge of the interface of the first molded body, Manufacturing equipment for resin products.

11. A manufacturing apparatus for resin products according to claim 6 or claim 7, The first molded body has an interface in which a plurality of string-like portions made of the first resin are in contact, and the ends of the interface are exposed on the surface of the first molded body. The stacking control unit is When the second molded body is laminated onto the first molded body, the operation of the molding nozzle is controlled to supply the second resin along the edge of the interface of the first molded body in a shape that covers the edge of the interface. The laser control unit, When welding the first molded body and the second molded body, the second molded body is configured to be welded to the first molded body in a range that encloses the end of the interface of the first molded body. Manufacturing equipment for resin products.

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