Material ejection device, three-dimensional modeling device, injection molding device

Abstract

Disclosed is a material ejection device, a three-dimensional modeling device, and an injection molding device, which are capable of easily and accurately measuring the amount of material 9 even when the material 9 stored in the material storage portion 13 has a mortar-like surface. The material ejection device (3) includes a material storage portion (13) that stores a material (9) inside and has an outlet portion (11) at a lower portion, and an ejection portion (15) that ejects the material (9) coming out of the outlet portion (11) to the outside in a state in which at least a part of the material (9) is plasticized. The material ejection device (3) includes a remaining amount detection portion (7) that detects the remaining amount of the material (9) stored in the material storage portion (13) from above the material storage portion (13). The three-dimensional modeling device (1) includes the material ejection device (3) that ejects the material (9) used for modeling, and a stage (5) on which the material (9) ejected from the material ejection device (3) is layered.

Description

Technical Field

[0001] The present invention relates to a material ejection device, a three-dimensional modeling device having the material ejection device, and an injection molding device. Background Technology

[0002] As an example of such a three-dimensional modeling device, the three-dimensional modeling device described in Patent Document 1 can be cited. The three-dimensional modeling device described in Patent Document 1 includes a material storage section for storing material and a melting section for melting the material supplied by the material storage section as modeling material. Furthermore, it discloses that the remaining state of the material stored in the material storage section is detected by an optical sensor provided on the outer side of the material storage section.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2021-35736

[0004] In the case of the material storage section as described in the above-mentioned literature, material is supplied from the outlet of the material storage section toward the melting section. Therefore, there is a situation where the surface of the material stored in the material storage section becomes a mortar-shaped surface with a partial depression corresponding to the center of the outlet. In this case, in a structure that detects the remaining amount from the outer side of the material storage section, there is a possibility that the remaining amount of material cannot be accurately measured. Summary of the Invention

[0005] To solve the above problems, the material ejection device of the present invention is characterized by comprising: a material storage section for storing material internally and having an outlet section at the lower part; an ejection section for ejecting the material supplied by the outlet section to the outside in a state of plasticizing at least a portion of the material; and a balance detection section for detecting the balance of the material stored in the material storage section from above the material storage section.

[0006] Furthermore, the three-dimensional modeling apparatus of the present invention is characterized by comprising: a material ejection device for ejecting modeling material; and a stage for stacking the material ejected from the material ejection device, wherein the material ejection device is a material ejection device having the excess material detection unit.

[0007] Furthermore, the injection molding apparatus of the present invention is characterized by comprising: a material ejection device for ejecting material for injection molding; and a fixing part for fixing a molding die that receives the material ejected from the material ejection device, wherein the material ejection device is a material ejection device having the excess material detection part. Attached Figure Description

[0008] Figure 1 This is a simplified structural diagram of the three-dimensional modeling device according to Embodiment 1.

[0009] Figure 2This is a simplified structural diagram of the three-dimensional modeling device according to Embodiment 1.

[0010] Figure 3 This is an enlarged perspective view of the material storage section in Embodiment 1.

[0011] Figure 4 This is an enlarged cross-sectional view of the balance detection unit and the material storage unit in Embodiment 1.

[0012] Figure 5 This is an enlarged cross-sectional view of the balance detection unit and the material storage unit in Embodiment 1.

[0013] Figure 6 This is a partially enlarged perspective view of the material storage section of one of the embodiments.

[0014] Figure 7 This is a partially enlarged perspective view of the material storage section of the other party to Embodiment 1.

[0015] Figure 8 This is a simplified structural diagram of the injection molding apparatus according to Embodiment 2.

[0016] Symbol Explanation

[0017] 1…3D modeling device; 2…pipe; 3…material ejection device; 3a…first material ejection device; 3b…second material ejection device; 4…plasticizing section; 5…stage; 6…ejection outlet; 7…residue detection section; 8…arm; 9…material; 10…first restraint section; 11…exit section; 12…second restraint section; 13…material storage section; 14…holding plate; 15…ejection section; 16…transparent plate; 18…first contact section; 19…ejection wave; 20…second contact section; 21… …Reflected wave; 22…Holding part; 23…Center; 24…Holding plate; 25…Upper surface; 26…Holding part; 27…Hole; 28…Button for insertion / removal; 29…First direction; 30…Button for insertion / removal; 31…First moving part; 32…Joined part; 33…Second moving part; 34…Joined part; 35…Third moving part; 37…Control part; 50…Mold; 70…Control part; 80…Fixing part; 100…Injection molding device; 130…Material ejection device. Detailed Implementation

[0018] The present invention will now be briefly described.

[0019] To solve the above problems, the material ejection device of the first aspect of the present invention is characterized by comprising: a material storage section for storing material internally and having an outlet section at the lower part; an ejection section for ejecting the material supplied by the outlet section to the outside in a state of plasticizing at least a portion of the material; and a balance detection section for detecting the balance of the material stored in the material storage section from above the material storage section.

[0020] According to this method, the remaining amount detection unit detects the remaining amount of material stored in the material storage section from above, rather than from the side of the material storage section. Therefore, even if the material stored in the material storage section forms a recessed mortar-shaped surface, it is less susceptible to the influence of the mortar shape, thus making it easier to accurately measure the remaining amount of material.

[0021] The material ejection device according to a second aspect of the present invention is characterized in that, in the first aspect, the remaining quantity detection unit is disposed above the material storage unit and is a ranging sensor that measures the distance to the object based on the emitted wave toward the object and the reflected wave from the object. Examples of such ranging sensors include optical sensors, ultrasonic sensors, and radio wave sensors.

[0022] According to this method, the margin detection unit is a sensor such as an optical sensor that measures distance in a non-contact manner, so it can be easily designed and manufactured.

[0023] The material ejection device of the third aspect of the present invention is characterized in that, in the second aspect, the ranging sensor ejects the ejection wave toward the center of the outlet.

[0024] According to this method, the ranging sensor emits the emitted wave toward the center of the outlet. Thus, the ranging sensor measures the distance to the lowest part of the mortar-shaped surface, thereby preventing the material from leaking out of the material storage section.

[0025] The material ejection device according to a fourth aspect of the present invention is characterized in that, in the second or third aspect, the material storage section includes a component having a hole having a passage for forming the ejected wave, wherein the ejected wave passes through the hole when the material storage section is installed in a predetermined position.

[0026] According to this method, when the material storage section is installed in a predetermined position, the emitted wave passes through the hole. In other words, when the material storage section is not installed in the predetermined position, the emitted wave cannot pass through the hole. Therefore, it is easy to confirm whether the material storage section is accurately installed in the predetermined position.

[0027] The third-dimensional modeling apparatus according to the fifth aspect of the present invention is characterized by comprising: a material ejection device for ejecting modeling material from an ejection section; and a stage for stacking the material ejected by the material ejection device, wherein the material ejection device is a material ejection device having the remaining amount detection section.

[0028] According to this method, the material ejection device includes the remaining amount detection unit, so as a three-dimensional modeling device, it can obtain the effects of the various methods of the material ejection device.

[0029] The sixth aspect of the three-dimensional modeling apparatus of the present invention is characterized in that, in the fifth aspect, it comprises: a first moving part that moves the material storage part and the ejection part along a first direction perpendicular to the stage; a second moving part that moves the material storage part alone along the first direction; a third moving part that moves the ejection part alone along the first direction; and a control part that controls the movement of the first moving part, the second moving part, and the third moving part, wherein the control part controls the modeling process such that, during modeling, the third moving part moves the ejection part so that the nozzle outlet of the ejection part approaches the stage compared to a time other than during modeling. That is, the nozzle outlet is configured to be at the position during modeling.

[0030] According to this method, the control unit, during molding, causes the ejection unit to move, bringing the nozzle outlet of the ejection unit closer to the stage than during molding. That is, the nozzle outlet is configured to be at the position used during molding. Thus, the effects of each of these methods of the material ejection device can be obtained.

[0031] The third-dimensional modeling apparatus of the seventh aspect of the present invention is characterized in that, in the sixth aspect, it has a first limiting part fixed to the first moving part and a second limiting part fixed to the material storage part, and when the control part moves the material storage part toward the stage via the second moving part, the movement of the material storage part is restricted at the position where the first limiting part and the second limiting part are in contact.

[0032] According to this method, when the material storage section is moved toward the stage by the second moving part, the first and second limiting parts come into contact, thereby restricting the movement of the material storage section beyond a predetermined distance. Therefore, when the ejector section ejects the material, the ejector section is in a position independent of the material storage section, i.e., a separated position. Thus, the risk of misalignment of the ejector section's ejection position can be reduced.

[0033] The third-dimensional modeling device according to the eighth aspect of the present invention is characterized in that, in the sixth or seventh aspect, it has a first contact portion fixed to the material storage section and a second contact portion fixed to the ejection section. When the control section moves the ejection section away from the stage by the third moving section, the second contact portion and the first contact portion come into contact and cooperate with the second moving section to lift the material storage section.

[0034] According to this method, when the control unit moves the ejection section away from the stage via the third moving section, the second contact section and the first contact section contact and cooperate with the second moving section to lift the material storage section. This cooperation facilitates increasing the capacity of the material storage section or enables miniaturization of the drive source for the second moving section.

[0035] The injection molding apparatus according to the ninth aspect of the present invention is characterized by comprising: a material ejection device for ejecting material for injection molding from an ejection section; and a fixing section for fixing a molding die that receives the material ejected from the material ejection device, wherein the material ejection device is a material ejection device having the excess material detection section.

[0036] According to this method, the material ejection device includes the remaining amount detection unit, so as an injection molding device, it can obtain the effects of the various methods of the material ejection device.

[0037] Implementation Method 1

[0038] Below, regarding the material ejection device of Embodiment 1 and the three-dimensional modeling device equipped with the material ejection device, according to... Figures 1 to 7 Please provide a detailed explanation.

[0039] In the following explanation, the three mutually orthogonal axes, as shown in the figures, are designated as the X-axis, Y-axis, and Z-axis. The Z-axis direction corresponds to the vertical direction, i.e., the direction in which gravity exerts its force. The X-axis and Y-axis directions correspond to the horizontal direction. In the figures, the arrows indicating the three axes (X, Y, Z) represent the positive (+) direction, and their opposite directions represent the negative (-) direction.

[0040] like Figure 1 As shown, the three-dimensional modeling apparatus 1 of this embodiment includes: a material ejection device 3, which ejects modeling material 9 from the ejection section 15. Figure 4 The material ejection device 3 includes a material ejection unit 7 (described later) and a stage 5 for stacking the material 9 ejected from the material ejection device 3. The material ejection device 3 also includes a control unit 37 for controlling the stacking action of the material 9 ejected from the material ejection device 3 onto the stage 5.

[0041] Here, as a plasticizing section 4 (in the material ejection device 3) Figure 2 In one example of plasticization, material 9 is a fluid containing a filler resin. Furthermore, the term "ejection" encompasses both the situation where material 9 of the fluid is extruded from an outlet in a continuous, rope-like manner and the situation where the material is released in a particulate state.

[0042] The material ejection device 3 of this embodiment includes: a material storage section 13 for storing material 9 and having an outlet section 11 at the bottom; and an ejection section 15 for ejecting material 9 from the outlet section 11 to the outside in a state where at least a portion of it is plasticized in the plasticizing section 4. Furthermore, it includes a balance detection section 7 for detecting the remaining amount of material 9 stored in the material storage section 13 from above.

[0043] The outlet 11 and the ejection section 15 of the material storage section 13 are connected by a pipe 2. The particulate material 9 in the material storage section 13 passes through the pipe 2 and reaches the ejection section 15. It becomes a fluid that is plasticized in the plasticizing section 4 in the ejection section 15 and can be ejected, and is ejected from the ejection outlet 6 of the ejection section 15 onto the stage 5.

[0044] like Figure 2 As shown, the material ejection device 3 consists of a first material ejection device 3a and a second material ejection device 3b. Here, the first material ejection device 3a ejects the material that ultimately becomes the structural material of the shaped object. The second material ejection device 3b ejects the supporting material. When the first material ejection device 3a is in the shaped position (described later) and performing the ejection action, the second material ejection device 3b is in a position avoiding the shaped position. When the second material ejection device 3b is in the shaped position (described later) and performing the ejection action, the first material ejection device 3a is in a position avoiding the shaped position.

[0045] Furthermore, the second material ejection device 3b is not limited to ejecting the support material, but can also be used to eject the material that ultimately becomes the structural material of the object itself. Additionally, a third material ejection device may also be included.

[0046] The first material ejection device 3a and the second material ejection device 3b have the same structure. In the following description, when distinguishing between the first material ejection device 3a and the second material ejection device 3b, the letters a and b are added to the numerical symbols of each component. When it is not necessary to distinguish them, the description may sometimes omit the letters a and b.

[0047] Balance Inspection Department

[0048] The remaining quantity detection unit 7 is positioned above the material storage unit 7 via arm 8. For example... Figure 4As shown, the balance detection unit 7 emits an emitted wave 19 towards the upper surface of the material 9 located within the material storage unit 7, which is the object. It also receives the reflected wave 21 from the material 9 and measures the distance to the object. In this embodiment, the balance detection unit 7 is a distance measuring sensor 17 that uses the emitted wave 19 and the reflected wave 1 to measure distance. Specifically, the distance measuring sensor 17 used here is an optical sensor where the emitted wave 19 is a light beam. Besides optical sensors, ultrasonic sensors and electromagnetic sensors can be cited as distance measuring sensors 17.

[0049] Furthermore, the remaining quantity detection unit 7 is not limited to the ranging sensor 17, as long as it can detect the remaining quantity of material 9 from above the material storage unit 7.

[0050] like Figure 4 As shown, the distance sensor 17, which serves as the margin detection unit 7, is configured to emit a beam of light as an emitted wave 19 toward the center 23 of the outlet unit 11. That is, the distance sensor 19 is configured to measure the distance to the lowest part of the mortar-shaped surface.

[0051] Furthermore, the material storage section 13 has a hole 27 forming a passage for the emitted wave 19 in a component on its upper surface 25. It is configured such that when the material storage section 13 is installed in a predetermined position, the emitted wave 19 passes through the hole 27. In other words, it is configured such that when the material storage section 13 is not correctly installed in the predetermined position, the emitted wave 19 cannot pass through the hole 27. Figure 3 and Figure 4 In the diagram, symbol 16 represents a transparent plate through which reflected wave 21 passes.

[0052] In this way, the ranging sensor 17, through the formed hole 27, also serves as an installation status confirmation sensor to confirm that the material storage section 13 is correctly installed in the predetermined position and is not correctly installed.

[0053] Alternatively, the hole 27 that forms the passage for the emitted wave 19 may not be formed on the upper surface 25, but may be a component located inside the material storage section.

[0054] Figure 5 This diagram shows the case where the ranging sensor 17, which serves as the margin detection unit 7, is an ultrasonic sensor. Corresponding to the ultrasonic sensor, the aperture 27 through which the emitted wave 19 passes is formed with a larger diameter than in the case of an optical sensor. The reflected wave 20, which is omitted from the diagram, passes through the aperture 27 and is received by the margin detection unit 7. Other structures are similar to... Figure 4 Since the optical sensors are the same, the same symbols are used to mark the same parts and their descriptions are omitted.

[0055] First moving part, second moving part, third moving part

[0056] And, as Figure 1As shown, the three-dimensional modeling apparatus 1 of this embodiment includes a first moving part 31 that moves the material storage part 13 and the ejection part 15 along a first direction (Z-axis direction) 29 perpendicular to the stage 5. It also includes a second moving part 33 that moves the material storage part 13 independently along the first direction 29, and a third moving part 35 that moves the ejection part 15 independently along the first direction 29. That is, the material storage part 13 is configured to move independently along the first direction 29 relative to the ejection part 15 via the second moving part 33, and the ejection part 15 is configured to move independently along the first direction 29 relative to the material storage part 13 via the third moving part 35.

[0057] In addition, a control unit 37 is provided to control the movement of the first moving part 31, the second moving part 33, and the third moving part 35. Regarding the control unit 37, during modeling, the third moving part 35 moves the ejector part 15 (in the -Z direction) so that the nozzle outlet 6 of the ejector part 15 is closer to the stage 5 than it would be during modeling. That is, it is configured such that during modeling, the third moving part 35 positions the nozzle outlet 6 of the ejector part 15 at the position it was in during modeling.

[0058] First Restriction Section, Second Restriction Section

[0059] And, as Figure 2 and Figure 7 As shown, the three-dimensional modeling device 1 of this embodiment has a first limiting part 10 fixed to the first moving part 31 and a second limiting part 12 fixed to the material storage part 13. Figure 2 In the diagram, symbol 14 is the retaining plate for the material storage section 13, and symbol 24 is the retaining plate for the ejection section 15.

[0060] Furthermore, the material storage unit 13 is configured such that when the control unit 37 moves the material storage unit 13 toward the stage 5 (-Z direction) via the second moving unit 33, the movement of the material storage unit 13 is restricted at the position where the first restricting unit 10 and the second restricting unit 12 are in contact.

[0061] First contact part, second contact part

[0062] And, as Figure 2 and Figure 6 As shown, the three-dimensional modeling device 1 of this embodiment has a first contact portion 18 fixed to the material storage portion 13 and a second contact portion 20 fixed to the ejection portion 15.

[0063] Furthermore, when the control unit 37 moves the ejection unit 15 away from the stage 5 (+Z direction) via the third moving unit 35, the second contact unit 20 contacts the first contact unit 18 and cooperates with the second moving unit 33 to lift the material storage unit 13.

[0064] like Figure 6 and Figure 7 As shown, in this embodiment, the material storage unit 13 is configured to be plugged into and unplugged from the connecting part on the tube 2 side with a single touch. Specifically, when the material storage unit 13 is removed, when the user holds the left and right gripping parts 22, 26 with both hands and presses the pair of left and right plugging / unplugging buttons 28, 30, the connection with the pair of coupling parts 32, 34 on the connecting part on the tube 2 side is released, allowing it to be detached. When the material storage unit 13 is installed, installation can be performed by performing the reverse steps described above.

[0065] The case where the material storage section moves away from the platform.

[0066] When switching from a molding process based on the first material ejection device 3a to a molding process based on the second material ejection device 3b, the control unit 37 moves the material storage unit 13a in the +Z direction via the second moving unit 33, and moves the ejection unit 15a in the +Z direction via the third moving unit 35. At this time, as... Figure 2 As shown, the control unit 37 controls the second contact part 20a to contact the first contact part 18a, and cooperates with the second moving part 33 to lift the material storage part 13a.

[0067] The case where the material storage section moves toward the stage.

[0068] When switching from a molding process based on the first material ejection device 3a to a molding process based on the second material ejection device 3b, the control unit 37 moves the material storage unit 13b in the -Z direction via the second moving unit 33 and moves the ejection unit 15b in the -Z direction via the third moving unit 35. At this time, the movement of the material storage unit 13b in the -Z direction is restricted at the position where the first restricting unit 10b and the second restricting unit 12b are in contact.

[0069] Therefore, the ejector section 15b becomes independent of the material storage section 13b. That is, the load of the material storage section 13b does not act on the ejector section 15b, so the risk of misalignment of the ejector nozzle 6 in the Z-axis direction of the ejector section 15b is relatively small.

[0070] Explanation of the effects of Implementation Method 1

[0071] (1) In the material ejection device 3 according to this embodiment, the remaining amount detection unit 7 detects the remaining amount of material 9 stored in the material storage unit 13 from above, rather than from the side of the material storage unit 13. Therefore, even if the material 9 stored in the material storage unit 13 has a mortar-shaped surface, it is not easily affected by the mortar shape, thereby making it easy to accurately measure the remaining amount of material 9.

[0072] (2) Furthermore, according to this embodiment, the remaining quantity detection unit 7 is disposed above the material storage unit 13, and the distance to the object is measured by the emitted wave 19 toward the object and the reflected wave 21 from the object. The distance measuring sensor 17 measures the distance in a non-contact manner, so it can be easily designed and manufactured.

[0073] (3) Furthermore, according to this embodiment, the ranging sensor 17 emits the emitted wave 19 toward the center 23 of the outlet section 11. Therefore, the ranging sensor 17 measures the distance to the lowest part of the mortar-shaped surface, thus preventing the material 19 from being discharged from the material storage section 13 in advance.

[0074] (4) Furthermore, according to this embodiment, when the material storage section 13 is installed in the predetermined position, the emitted wave 19 passes through the hole 27. That is, when the material storage section 13 is not installed in the predetermined position, the emitted wave 19 cannot pass through the hole 27. Thus, it is easy to confirm whether the material storage section 13 is correctly installed in the predetermined position.

[0075] (5) According to the three-dimensional modeling device 1 of this embodiment, the material ejection device 3 is equipped with the excess detection unit 7, so as the three-dimensional modeling device 1, it is possible to obtain the effects based on the material ejection device 3.

[0076] (6) Furthermore, according to this embodiment, it includes: a first moving part 31 that moves the material storage part 13 and the ejection part 15 along a first direction 29 perpendicular to the stage 5; a second moving part 33 that moves the material storage part 13 alone along the first direction 29; and a third moving part 35 that moves the ejection part 15 alone along the first direction 29. Regarding the control part 37, during molding, the third moving part 35 moves the ejection part 15 so that the nozzle outlet 6 of the ejection part 15 is closer to the stage 5 than during molding. That is, the nozzle outlet 6 is positioned at the position used during molding. Thus, the effects described above based on the material ejection device 3 can be obtained.

[0077] (7) Furthermore, according to this embodiment, when the material storage section 13 is moved toward the platform 5 by the second moving part 33, the first limiting part 10 and the second limiting part 12 come into contact, thereby restricting the movement of the material storage section 13 beyond a predetermined distance. Therefore, when the ejection part 15 performs the ejection of material 9, the ejection part 15 is located in a position independent of the material storage section 13, i.e., a separated position. Thus, the risk of misalignment of the ejection position of the ejection part 15 can be reduced.

[0078] (8) Furthermore, according to this embodiment, when the control unit 37 moves the ejection unit 15 away from the stage 5 via the third moving unit 35, the second contact unit 20 contacts the first contact unit 18 and cooperates with the second moving unit 33 to lift the material storage unit 13. Through this cooperation, it is easy to increase the capacity of the material storage unit 13, or the drive source of the second moving unit 33 can be miniaturized.

[0079] Implementation Method 2

[0080] Below, according to Figure 8 The injection molding apparatus according to Embodiment 2 will be described. Furthermore, parts identical to those in Embodiment 1 will be marked with the same symbols and their descriptions will be omitted.

[0081] like Figure 8 As shown, the injection molding apparatus 100 of this embodiment includes: a material ejection device 130 for ejecting material for injection molding; a fixing part 80 for fixing a molding die 50 that receives the material ejected from the material ejection device 130; and a control part 70 for controlling the ejection of material from the material ejection device 130 to the molding die 50 and the molding operation. The material ejection device 130 includes a margin detection part 7 and uses a material ejection device with a structure substantially the same as that of the material ejection device 1 in Embodiment 1.

[0082] According to the injection molding apparatus 100 of this embodiment, the material ejection device 130 is equipped with a margin detection unit 7, so as the injection molding apparatus 100, the same effect as in the first embodiment can be obtained.

[0083] Other implementation methods

[0084] The material ejection device 3 and the three-dimensional modeling device 1 or injection molding device 100 equipped with the material ejection device 3 of the present invention are based on the structure of the embodiments described above. However, it is of course possible to make some structural changes and omissions without departing from the spirit of the present invention.

Claims

1. A three-dimensional modeling device, characterized in that, have: Material ejection device, which ejects shaping material from the ejection section; and The stage receives the molding material ejected from the ejector section. The material ejection device includes: The material storage section stores materials internally and has an outlet at the bottom. The ejection section ejects the material supplied by the outlet section to the outside in a state in which at least a portion of the material is plasticized; and The remaining quantity detection unit detects the remaining quantity of material stored in the material storage unit from above. The three-dimensional modeling device also features: The first moving part moves the material storage part and the ejection part along a first direction perpendicular to the stage. The second moving part causes the material storage part to move independently along the first direction; The third moving part causes the ejector part to move independently along the first direction; and The control unit controls the movement of the first moving part, the second moving part, and the third moving part. The control unit performs the following control during the molding process: the third moving unit moves the ejector unit so that the nozzle outlet of the ejector unit is closer to the stage than during the molding process.

2. The three-dimensional modeling device according to claim 1, characterized in that, The remaining quantity detection unit is a distance measuring sensor disposed above the material storage unit, which measures the distance to the object based on the emitted wave toward the object and the reflected wave from the object.

3. The three-dimensional modeling device according to claim 2, characterized in that, The ranging sensor emits the emitted wave toward the center of the outlet.

4. The three-dimensional modeling device according to claim 2 or 3, characterized in that, The material storage section includes a component having a hole that forms a passage for the emitted wave. With the material storage section installed in a predetermined position, the emitted wave passes through the hole.

5. The three-dimensional modeling device according to any one of claims 1 to 3, characterized in that, have: The first limiting part is fixed to the first moving part; as well as The second limiting part is fixed to the material storage part. When the control unit moves the material storage unit toward the stage via the second moving part, the movement of the material storage unit is restricted at the position where the first restricting part and the second restricting part are in contact.

6. The three-dimensional modeling device according to any one of claims 1 to 3, characterized in that, have: The first contact portion is fixed to the material storage portion; and The second contact portion is fixed to the ejection portion. When the control unit moves the ejection part away from the stage via the third moving part, the second contact part and the first contact part come into contact and cooperate with the second moving part to lift the material storage part.

7. An injection molding apparatus, characterized in that, have: Material ejection device, which ejects material for injection molding from the ejection section; and The fixing part secures the forming mold that receives the injection molding material ejected from the ejection part. The material ejection device includes: The material storage section stores materials internally and has an outlet at the bottom. The ejection section ejects the material supplied by the outlet section to the outside in a state in which at least a portion of the material is plasticized; and The remaining quantity detection unit detects the remaining quantity of material stored in the material storage unit from above. The injection molding apparatus also includes: The first moving part moves the material storage part and the ejection part along a first direction perpendicular to the stage. The second moving part causes the material storage part to move independently along the first direction; The third moving part causes the ejector part to move independently along the first direction; and The control unit controls the movement of the first moving part, the second moving part, and the third moving part. The control unit performs the following control during the molding process: the third moving unit moves the ejector unit so that the nozzle outlet of the ejector unit is closer to the stage than during the molding process.

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