JP6949191B1 - 3D printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a 3D printer capable of manufacturing a high-quality model by realizing good curing quality while reducing a manufacturing cost. SOLUTION: This is a 3D printer that manufactures a modeled object using an ultraviolet curable material that is cured by irradiation with ultraviolet rays, and is movable in the left-right direction and the front-back direction with a material tank that stores the ultraviolet-curable material. An injection part capable of injecting the ultraviolet curable material stored in the material tank, a stage on which the ultraviolet curable material injected by the injection part is placed and movable in the vertical direction, and a stage movable in the horizontal direction and the front-back direction. The ultraviolet irradiation unit that irradiates the ultraviolet curing material injected onto the stage with ultraviolet rays, the material tank, the stage, the injection unit, and the housing that houses the ultraviolet irradiation unit, and the above. It is equipped with an ultraviolet shielding part that prevents ultraviolet rays from entering the inside of the housing from the outside of the housing. [Selection diagram] Fig. 1

Description

The present invention relates to a 3D printer, and more particularly to an improvement of a 3D printer that manufactures a model using an ultraviolet curable material that is cured by irradiation with ultraviolet rays.

A conventional 3D printer using a thermosetting silicone rubber as a material is configured to be thermoset by a halogen lamp.
This halogen lamp is composed of an elongated cylindrical lamp similar to a general fluorescent tube, which has a length dimension that can supply heat over the entire width direction of the stage forming the model, and this halogen lamp has a dispenser part. After the shape of the modeled object is formed on the stage by the modeling material that is fixed to the moving part in the front-rear direction that moves in the front-rear direction and ejected by the dispenser, the modeling material is irradiated with halogen light while moving in the front-rear direction. It is configured to cure. The conventional halogen lamp type 3D printer configured in this way has the following problems.

First, since the halogen lamp is large, the power consumption is large, and the power consumption for manufacturing the modeled object is large, so the manufacturing cost is high, and the temperature inside the housing constituting the 3D printer rises at the time of curing. There is a problem that the manufacturing work of the worker may be hindered and the safety is lowered.

Secondly, as described above, in the conventional halogen lamp type 3D printer, the halogen lamp is fixed to the moving member in the front-rear direction, and the shape of the modeled object is formed on the stage by the modeling material ejected by the dispenser. Is configured to irradiate the molding material with halogen light and cure it while moving in the front-rear direction, so that the molding material on the stage is irradiated with halogen light. There is a problem that a time lag occurs between the time point and the time point when the irradiation of halogen light is completed, and during that time, the degree of curing of the modeling material is different, and the curing quality of the modeled object may not be good. there were.

Thirdly, the halogen lamp is formed in the same shape as a general fluorescent tube, and since halogen light is irradiated on average in the stage width direction, each part of various shaped objects having various shapes and structures On the other hand, there was also a problem that it could not be sufficiently heated and a portion that was insufficiently cured remained in the modeled object.

Fourth, even when manufacturing small-scale and small-sized objects, the above-mentioned halogen lamp must be used for thermosetting work. Therefore, when producing small-scale and small-scale objects, modeling is required. There is a problem that the amount of heat required for manufacturing the product is supplied more than the amount of heat required for manufacturing, and the manufacturing cost is significantly increased.

Fifth, when a 3D printer is used to manufacture a small-scale model with a fine structure, a delicate thermosetting operation or molding operation may be required in the manufacturing process.
However, the conventional 3D printer using the heat-curable silicone rubber uses a halogen lamp having a size and a length over the entire width direction of the stage as a heat source as described above. In the case of a 3D printer that uses a halogen lamp as a heat source, the operability for performing delicate heat curing work is not appropriate, and it can be effectively handled when manufacturing a small-scale, finely structured model. It also had the problem of not being able to do it.

On the other hand, Patent Document 1 discloses a modeling apparatus for modeling a modeled object using a material that is cured by irradiation with ultraviolet rays.
However, in the technique of Patent Document 1, there is no mention of shielding external light entering from the outside to the inside of the housing. Therefore, the influence of ultraviolet rays from the outside cannot be eliminated, and there is a possibility that a high-quality model cannot be manufactured.

JP-A-2019-988

Therefore, an object of the present invention is to provide a 3D printer capable of producing a high-quality model by using an ultraviolet curable material and achieving good curing quality while reducing the manufacturing cost.

In order to achieve the above object, the invention according to claim 1 is a 3D printer that manufactures a modeled object using an ultraviolet curable material that is cured by irradiation with ultraviolet rays, and is a material tank that stores the ultraviolet curable material. , The injection part that can move in the left-right direction and the front-back direction and can inject the ultraviolet-curable material stored in the material tank, and the ultraviolet-curable material injected by the injection part are placed and move in the vertical direction. A possible stage, an ultraviolet irradiation unit that is movable in the left-right direction and the front-rear direction and irradiates the ultraviolet-curable material injected onto the stage with ultraviolet rays, a material tank, the stage, the injection unit, and the above. A housing for accommodating an ultraviolet irradiation unit inside and an ultraviolet shielding unit for preventing ultraviolet rays from entering the housing from the outside of the housing are provided, and the injection unit is a dispenser unit into which the ultraviolet curing material is injected. And a head portion provided at the tip of the dispenser portion and ejecting the ultraviolet curable material, the ejection portion is attached to a left-right direction moving portion for moving the injection portion in the left-right direction, and the above-mentioned The left-right moving portion is attached to the front-back moving portion so as to be movable in the front-rear direction, the ultraviolet irradiation portion is fixed to the dispenser portion, and the ultraviolet irradiation portion is the ultraviolet curing material arranged on the stage. It is characterized in that it is formed in a ring shape as a whole so as to be able to surround the periphery of the ultraviolet rays, and has a plurality of point light sources.

Therefore, in the 3D printer according to the present invention, it is possible to prevent ultraviolet rays from entering the inside of the housing from the outside by the ultraviolet shielding portion. Further, in the 3D printer according to the present invention, since the ultraviolet irradiation portion is fixed to the dispenser portion, the movement of the dispenser portion and the head portion in the front-rear direction and the left-right direction can be followed, and the head Since it is arranged close to the portion, it irradiates the ultraviolet curable material emitted from the head portion with ultraviolet rays corresponding to the position.

Further, in the 3D printer according to the present invention, since a plurality of point light sources are arranged in an annular shape and formed in a ring shape as a whole, ultraviolet rays are uniformly applied from the surroundings to the entire modeled object. Can be irradiated.

The invention according to claim 2 is characterized in that the ultraviolet irradiation unit has a point light source.

The invention according to claim 3 is characterized in that the ultraviolet irradiation unit is provided in the front-back / left-right direction moving portion so as to be movable in cooperation with the dispenser portion.

In the invention according to claim 4, the ultraviolet irradiation unit is fixed to the side portion of the dispenser unit so as to irradiate the modeled object ejected onto the stage with ultraviolet rays from diagonally above. It is characterized by that.

The invention according to claim 5 is characterized in that the lower end portion of the ultraviolet irradiation portion is arranged below the lower end portion of the dispenser portion.

Therefore, in the 3D printer according to the present invention, the ultraviolet irradiation unit irradiates the ultraviolet rays in a state where the ultraviolet irradiation unit is closer to the modeled object than the dispenser unit.

The invention according to claim 6 is characterized in that the ultraviolet curable material is an ultraviolet curable silicone rubber.

The invention according to claim 7 is characterized in that the ultraviolet shielding portion comprises an ultraviolet shielding sheet attached to the inside of transparent glass of a window opening provided in the housing.

The invention according to claim 8 is characterized in that the heat energy irradiation unit is further provided as a heating unit.

In the invention according to claim 1, a material tank for storing the ultraviolet-curable material and an injection unit capable of ejecting the ultraviolet-curable material stored in the material tank, which can be moved in the left-right direction and the front-rear direction. , The ultraviolet curable material injected by the injection unit is placed on the stage, which can move in the vertical direction, and the ultraviolet curable material, which can move in the left-right direction and the front-back direction, emits ultraviolet rays to the stage. An ultraviolet irradiation unit to be irradiated, a housing that houses the material tank, the stage, the injection unit, and the ultraviolet irradiation unit, and an ultraviolet shielding unit that prevents ultraviolet rays from entering the housing from the outside of the housing. Since it is possible to prevent ultraviolet rays from entering the inside of the housing from the outside by the ultraviolet shielding part, the ultraviolet rays are applied to the ultraviolet curable material in a state where the influence of ultraviolet rays from the outside is eliminated. It is possible to produce a modeled object having a desired shape and structure by curing the modeled object while irradiating with ultraviolet rays.

As a result, it is possible to provide a 3D printer capable of producing a high-quality model by achieving good curing quality.
Further, since the ultraviolet irradiation part is fixed to the dispenser part, it can follow the movement of the dispenser part in the left-right direction and the front-back direction, and since it is arranged close to the head part, the head part It is possible to irradiate the ultraviolet curable material emitted from the ultraviolet rays in a timely and positional manner.
Further, since the ultraviolet irradiation unit is formed in an overall ring shape so as to surround the ultraviolet curing material arranged on the stage and has a plurality of point light sources, the ultraviolet curing material has a plurality of points. Since it is possible to irradiate the modeled object with ultraviolet rays evenly and appropriately from all around, it is possible to further supply ultraviolet rays to the modeled object.

In the invention according to claim 2, since the ultraviolet irradiation unit has a point light source, a large halogen lamp formed as an elongated lamp in a conventional 3D printer using heat-curable silicone rubber as a material. It can be formed smaller than in the case of, and does not require power consumption for operation.
That is, the conventional halogen lamp requires a rated power of 2 KW, and it is impossible to adjust this power.

However, in the present invention, since it is configured to irradiate ultraviolet light by an ultraviolet irradiation unit composed of a point light source, the power consumption can be small and the power consumption in manufacturing a modeled object can be reduced. This makes it possible to reduce the manufacturing cost related to the production of the modeled object, and the housing to be stored can be miniaturized, so that the entire 3D printer device can be miniaturized.

Moreover, since the conventional halogen lamp is large, the operability is not good. That is, when the halogen lamp body is operated, it is configured to irradiate the modeled object with heat only at a constant temperature of 2000 ° C., and the temperature cannot be adjusted. Therefore, the degree of thermosetting In order to adjust the temperature, it is necessary to move the stage in the vertical direction to cure the molded object while separating it from the halogen lamp, and the adjustment work in curing is complicated.

Further, when the halogen lamp is operated, the inside of the housing becomes extremely hot, so that the workability by the operator is not good, and it is also necessary to ensure the safety during the modeling work.
However, in the present invention, since the modeled object is cured by the ultraviolet irradiation portion, the temperature is not as high as that at the time of curing by the halogen lamp according to the conventional configuration, so that the housing temperature is also high. The temperature does not reach higher than in the past, and as a result, the operator can easily perform the curing operation during the curing operation.

Further, in the present invention, since the ultraviolet irradiation part is composed of a point light source and the ultraviolet irradiation part can be miniaturized, it is possible to irradiate only the necessary part of the modeled object, so that the modeling work is more efficient than before. Can be done

Furthermore, when curing with a conventional large-sized tubular halogen lamp, it is impossible to specify the heating site of the modeled object and heat it, and there is no choice but to always heat the entire modeled object. In the present invention, since the ultraviolet irradiation portion is composed of a point light source, the irradiation range can be formed to be small, so that it is possible to narrow down the irradiation to a portion requiring curing and cure it. The modeling speed of the entire object can be increased and the modeling time can be shortened.

In addition, since ultraviolet rays have directivity and it is easy to control the irradiation direction, it becomes possible to perform delicate thermosetting work and molding operation in the manufacturing process.

Further, in the case of manufacturing a small-scale or small-sized modeled object, the power consumption corresponding to the amount of heat required for the small-scale modeled object is sufficient, and the manufacturing cost can be significantly reduced as compared with the conventional case.

In the invention according to claim 3, since the ultraviolet irradiation unit is provided in the front-back / left-right direction moving portion so as to be movable in cooperation with the dispenser portion, the ultraviolet irradiation portion is a dispenser portion. Since it can follow the movements in the left-right direction and the front-back direction and is arranged close to the head part, it corresponds to the ultraviolet curable material emitted from the head part in terms of time and position. Can be irradiated with ultraviolet rays.
As a result, a time lag occurs between the time when the halogen light irradiation is started and the time when the halogen light irradiation is completed on the modeling material on the stage as in the conventional case, and the degree of curing of the modeling material is increased during that time. It is possible to solve the problem of making a difference.

In addition, since it is possible to irradiate the required part with ultraviolet rays to cure it according to the shape and structure of the modeled object, it is possible to manufacture a high-quality modeled object regardless of the shape and structure of the modeled object. It will be possible.

Furthermore, since it is possible to irradiate by converging ultraviolet rays, it is possible to deal with the case where delicate coin work is required in the case of a small-scale, small-sized model with a fine structure. Become.

In the invention according to claim 4, since the ultraviolet irradiation unit irradiates ultraviolet rays from diagonally above the ultraviolet curing material injected onto the stage, the ultraviolet irradiation is obliquely applied to the modeled object. Therefore, it is possible to supply ultraviolet rays according to the size, shape, and structure of the modeled object.

In the invention according to claim 5, since the lower end portion of the ultraviolet irradiation portion is arranged below the lower end portion of the injection portion, the ultraviolet irradiation portion is closer to the modeled object than the emission portion. Therefore, it is possible to supply ultraviolet rays according to the size, shape, and structure of the modeled object.

In the invention according to claim 6, since the ultraviolet curable material is an ultraviolet curable silicone rubber, it is possible to avoid using a heat curable silicone rubber that is cured by heat. In comparison, not only is there no waste of energy, but the temperature inside the housing is low, so workability is good and safety is high.

In the invention according to claim 7, since the ultraviolet shielding portion is made of an ultraviolet shielding sheet attached to the inside of the transparent glass of the window opening provided in the housing, the ultraviolet shielding portion of the housing. Curing the modeled object while irradiating the UV-curing material that cures by UV irradiation while preventing the invasion of UV rays from the transparent part to the outside and eliminating the influence of UV rays from the outside of the housing. It is possible to manufacture a modeled object.

In the invention according to claim 8, since the heat energy irradiation unit is further provided as a heating unit, by using the heat energy irradiation unit and the ultraviolet irradiation unit together, more efficient curing work can be performed according to the modeled object. Can be performed, the curing speed of the modeled object can be increased, and the curing time of the modeled object can be reduced.

It is a conceptual diagram which shows one Embodiment of the 3D printer which concerns on this invention. It is a front conceptual diagram which shows more concretely the structure of the 3D printer which concerns on one Embodiment of this invention. It is a perspective conceptual diagram which shows more concretely the structure of the 3D printer which concerns on one Embodiment of this invention. It is a conceptual diagram which shows the other embodiment of the ultraviolet irradiation part used in the 3D printer which concerns on this invention.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the 3D printer 10 according to the present embodiment is a 3D printer that manufactures a modeled object using an ultraviolet curable material that is cured by irradiation with ultraviolet rays, and stores the ultraviolet curable material. The material tank 13 to be used, the injection unit 15 that can move in the left-right direction and the front-back direction and can inject the ultraviolet-curable material stored in the material tank, and the ultraviolet-curable material injected by the injection unit 15 are placed. The stage 14 is movable in the vertical direction, the ultraviolet irradiation unit 16 is movable in the left-right direction and the front-rear direction, and irradiates the ultraviolet-curable material emitted to the stage 14, and the material tank 13 and the stage. It includes a 14 and an injection unit 15, and a housing 17 for accommodating the ultraviolet irradiation unit.

The 3D printer 10 according to the present embodiment includes a control unit 19. The control unit 19 is configured to control each part (each motor) of the 3D printer 10 based on the shape, structural data, material data of the material 11 and the like stored in advance to manufacture the modeled object 12. Has been done.

More specifically, as shown in FIGS. 1 and 2 according to the present embodiment, a material tank 13 containing the ultraviolet curable material 11 is arranged at the inner upper end of the housing 17. .. The material tank 13 is fixed to the upper end of the housing 17 by the fixing holder 21.
Below the material tank 13, an injection unit 15 is arranged so as to be connected to the material tank 13 via a material supply tube 30. The injection unit 15 is provided at the dispenser unit 22 into which the ultraviolet curable material is injected, the head unit 27 provided at the lower part of the dispenser unit 22, and the head unit 27 for ejecting the ultraviolet curable material, and the motor unit 23 provided at the upper part of the dispenser unit 22. And have.
In the present embodiment, the material tank 13, the material supply tube 30, the dispenser portion 22, and the head portion 27 are arranged on the same vertical axis X.

The injection unit 15 is mounted on the left-right moving unit 24 composed of moving rails, and is configured to be movable in the left-right direction on the stage 14 in the housing 17 along the left-right moving unit 24 by an appropriate driving unit. The left-right moving portion 24 is composed of a moving rail that can move in the front-rear direction, is attached to the front-back moving portion 25 fixed to the inside of both side wall portions of the housing 17, and moves in the front-rear direction by an appropriate driving unit. It is formed as possible.

Further, below the injection unit 15, a stage 14 on which a model 12 formed of the material injected from the head unit 27 of the injection unit 15 is placed is arranged. Below the stage 14, a vertical movement shaft portion 37 that allows the stage 14 to move in the vertical direction is arranged. The stage 14 is moved in the vertical direction by the vertical moving shaft portion 37 by driving an appropriately arranged motor.

As a result, the injection unit 15 can move in the left-right and front-rear directions in the housing 17, and since the stage 14 moves in the vertical direction, the ultraviolet curing emitted on the stage by the injection unit 15 The material 11 is configured so that the injection portion 15 can be moved in the front-rear direction, the left-right direction, and the relatively up-down direction in three dimensions to form the material 11.

Then, in the present embodiment, the ultraviolet irradiation unit 16 is fixed to the dispenser unit 22.

In the present embodiment, the ultraviolet irradiation unit 16 includes an ultraviolet irradiator 28 composed of a point light source. As shown in FIG. 1, the ultraviolet irradiation unit 16 is formed in a cylindrical shape, and an ultraviolet irradiator 28 composed of a point light source is provided at the tip end portion.
In the present embodiment, the ultraviolet irradiator 28 is formed by a UV lamp, but it may be an LED type ultraviolet irradiator, and is not limited to the present embodiment.
In the present embodiment, the ultraviolet irradiation unit 16 is formed in a cylindrical shape as a whole, and the dispenser unit 22 and the like are formed at a predetermined angle with respect to the vertical axis X in the housing 17 as described above by an appropriate arm member 29. It is inclined diagonally by the minute, and the upper end side is arranged so as to project outward, and in the side part of the dispenser part 22, ultraviolet rays are emitted from diagonally above with respect to the modeled object 12 ejected from the dispenser part or 15 onto the stage 14. It is arranged and fixed so as to irradiate. Further, the lower end portion of the ultraviolet irradiator 28 is arranged below the lower end portion of the head portion 27.

Further, the ultraviolet irradiation unit 16 has a luminous flux convergence mechanism (not shown) capable of converging the ultraviolet light to a desired size and width by appropriately configuring the ultraviolet light emitted from the ultraviolet irradiator 28 composed of a point light source. ) Is provided. As a result, in the present embodiment, by appropriately operating the luminous flux convergence mechanism, it is possible to irradiate the entire modeled object 12 with ultraviolet rays, and if necessary, irradiate the modeled object 12 with ultraviolet rays pinpointly. It is shaped so that it can be used.

In the present embodiment, the tip 31 of the ultraviolet irradiator 28, which is the lower end of the ultraviolet irradiation unit 16, is arranged below the tip 27a of the head portion 27, which is the lower end of the dispenser portion 22. .. Therefore, in the 3D printer 10 according to the present embodiment, the ultraviolet irradiation unit 16 is configured to be arranged closer to the modeled object 12 (see FIG. 1) than the dispenser unit 22.

Then, in the present embodiment, the ultraviolet shielding portion 18 that shields ultraviolet rays is provided in all the light transmitting portions such as the window opening formed of the transparent material such as the door glass of the housing 17. It has.
That is, as shown in FIGS. 2 and 3, a front door 32 is provided on the front side of the housing 17 formed in an overall vertically long rectangular parallelepiped shape so as to be openable and closable, and window openings 33 are provided on both sides. Is provided.
Then, the ultraviolet shielding sheet 35 is attached to the entire inner side surface of the glass portion of the opening 34 of the front door 32 and the window opening 33 to form the ultraviolet shielding portion 18, and the ultraviolet rays do not enter from the outside to the inside of the housing. It is configured as follows.

The UV curable material 11 is a UV curable silicone rubber. When the ultraviolet curable material 11 is irradiated with ultraviolet rays from the ultraviolet irradiation unit 16, a situation of "ultraviolet curing (UV curing)" occurs. This "ultraviolet curing (UV curing)" is curing by a chemical reaction (polymerization reaction) using ultraviolet rays, and is different from "thermosetting" when halogen light is applied to a conventional thermosetting silicone rubber. ..

Hereinafter, the operation of the 3D printer according to the present embodiment will be described.
In the 3D printer 10 according to the present embodiment, the ultraviolet curable material 11 is stored in the material tank 13 as a modeling material.
When the ultraviolet curable material 11 is ejected from the dispenser unit 22 to the stage 14 via the head unit 27 so as to have an appropriate shape and structure based on the modeling information stored in the control unit 19, the control unit By the drive control of 19, ultraviolet rays are applied to the ultraviolet curable material 11 on the stage 14 from the ultraviolet irradiator 28 composed of a point light source following the injection of the material from the head portion 27.

Therefore, since the ultraviolet irradiator 28 made of a point light source is configured to irradiate ultraviolet light, the power consumption during curing can be small, and the power consumption in manufacturing the modeled object can be reduced. , It is possible to reduce the manufacturing cost related to the manufacturing of the modeled object.

As a result, the housing 17 to be housed can be miniaturized, so that the entire 3D printer device can be miniaturized. As a result, the height dimension of the 3D printer 10 according to the present embodiment is about 1 m, and the weight is formed to be about 50 to 100 kg. The conventional halogen lamp type 3D printer has a weight of 350 kg and a height dimension of about 3 m, and can be significantly reduced in size.

In the present embodiment, the ultraviolet curing material 11 is cured by the ultraviolet irradiating unit 16 having the ultraviolet irradiator 28 to form a modeled object. Since the temperature does not reach the high temperature of the above, the temperature of the housing 17 does not reach a higher temperature than the conventional one, and as a result, the operator can easily perform the curing work at the time of the curing work.

Further, in the present embodiment, since the ultraviolet irradiator 28 is composed of a point light source and the ultraviolet irradiation unit 16 is miniaturized as a whole, only the necessary parts of the modeled object are required. Since it is possible to irradiate the surface, the modeling work can be performed more efficiently than before.

Further, since ultraviolet rays have directivity and it is easy to control the irradiation direction, in the present embodiment, the ultraviolet irradiator 28 is provided with an ultraviolet converging portion having an appropriate configuration, and ultraviolet rays are required. By converging and forming a thin beam, it becomes possible to perform delicate thermosetting work and molding operation of the modeled object. In addition, when manufacturing such small-scale and small-scale shaped objects, the power consumption corresponding to the amount of heat required for the small-scale shaped objects is sufficient, and the manufacturing cost can be significantly reduced compared to the conventional case. Become.

In the present embodiment, the vertical axis X forming the dispenser portion 22 is inclined by a predetermined angle so that the upper end portion side protrudes outward and is arranged on the side of the dispenser portion 22. In the portion, the molded object 11 ejected from the dispenser portion or 15 onto the stage 14 is arranged and fixed so as to irradiate ultraviolet rays from diagonally above, and the lower end portion of the ultraviolet irradiator 28 is a head portion 27. Since it is arranged below the lower end of the stage 14, the ultraviolet curable material 11 on the stage 14 can be irradiated with ultraviolet rays in a closer state.

As a result, in the 3D printer 10 according to the present embodiment, efficient and, in some cases, delicate curing can be performed according to the size, shape, structure, and each part of the modeled object.

Further, in the present embodiment, the ultraviolet shielding sheet 35 is attached to the entire inner side surface of the glass portion of the opening 34 of the front door 32 of the housing 17 and the window opening 33 to form the ultraviolet shielding portion 18. However, since it is configured so that ultraviolet rays do not enter from the outside of the housing to the inside, it is possible to block the invasion of ultraviolet rays from the outside of the housing into the housing 17, so that ultraviolet rays from the outside invade. As a result, it is possible to effectively prevent a situation in which the ultraviolet curable material 11 starts to be cured by ultraviolet rays on the stage 14 and the curing process of the ultraviolet curable material 11 becomes non-uniform.

In the present embodiment, the case where the ultraviolet irradiation unit 16 is formed in a cylindrical shape as a whole and the ultraviolet irradiation device 28 is provided at the tip portion has been described as an example, but the present embodiment is limited to the present embodiment. Instead, a plurality of types of irradiation unit main bodies formed in a shape and size corresponding to the shape and size of the modeled object may be provided on the dispenser unit 22 and the like so as to be detachably provided.

That is, for example, as shown in FIG. 4, the UV curable material 11 arranged on the stage 14 is formed in an overall ring shape so as to be able to surround the periphery, and is configured to have a plurality of point light sources. May be good. In this case, the ring-shaped ultraviolet irradiation unit 36 irradiates the modeled object 12 with ultraviolet rays in a state closer to the ultraviolet curing material 11 and evenly from all directions. Can be done.

The configuration described in the above embodiment can be appropriately changed within the scope of the present invention, and is not limited to the configuration of the above embodiment.

Since the present invention relates to a 3D printer, it has wide industrial applicability.

10 3D printer 11 UV curing material 12 Modeled object 13 Material tank 14 Stage 15 Injection part 16 UV irradiation part 17 Housing 18 UV shielding sheet part 19 Control part 20 Ring-shaped part 21 Fixed holder 22 Dispenser part 23 Motor 24 Left-right movement part 25 Forward / backward moving part 26 Vertical axis part 27 Head part 28 Ultraviolet irradiator (UV lamp)
29 Arm member 30 Material supply tube 31 UV irradiator tip 32 Front door 33 Window opening 34 Opening 35 UV blocking sheet 36 UV irradiating part 37 Vertical movement shaft part 38 Head part tip

Claims (8)

A 3D printer that manufactures a model using an ultraviolet curable material that cures when exposed to ultraviolet light.
A material tank that stores the ultraviolet curable material, an injection unit that can move in the left-right direction and the front-back direction and can eject the ultraviolet curable material stored in the material tank, and an ultraviolet curing unit that is injected by the injection unit. A stage on which a material is placed and which can be moved in the vertical direction, an ultraviolet irradiation unit which is movable in the left-right direction and the front-back direction and irradiates the ultraviolet-curable material injected on the stage with ultraviolet rays, and the material. A housing that houses the tank, the stage, the injection unit, and the ultraviolet irradiation unit, and an ultraviolet shielding unit that prevents ultraviolet rays from entering the housing from the outside of the housing are provided.
The injection portion has a dispenser portion into which the ultraviolet curable material is injected, and a head portion provided at the tip of the dispenser portion to inject the ultraviolet curable material.
The injection portion is attached to a left-right moving portion that moves the injection portion in the left-right direction, and the left-right moving portion is attached to the front-rear moving portion so as to be movable in the front-rear direction.
The ultraviolet irradiation portion is fixed to the dispenser portion, and the ultraviolet irradiation portion is fixed to the dispenser portion.
A 3D printer characterized in that the ultraviolet irradiation unit is formed in an overall ring shape so as to surround the ultraviolet curing material arranged on the stage, and has a plurality of point light sources. The 3D printer according to claim 1, wherein the ultraviolet irradiation unit has a point light source. The 3D printer according to claim 1, wherein the ultraviolet irradiation unit is provided on the front-back / left-right direction moving portion so as to be movable in cooperation with the dispenser portion. The 3D according to claim 1, wherein the ultraviolet irradiation unit is fixed to a side portion of the dispenser unit so as to irradiate ultraviolet rays obliquely downward with respect to a modeled object ejected onto the stage. Printer. The 3D printer according to claim 3 or 4, wherein the lower end portion of the ultraviolet irradiation portion is arranged below the lower end portion of the dispenser portion. The 3D printer according to claim 1 to 5, wherein the ultraviolet curable material is an ultraviolet curable silicone rubber. The 3D printer according to claim 1, wherein the ultraviolet shielding portion comprises an ultraviolet shielding sheet attached to the inside of transparent glass of a window opening provided in the housing. The 3D printer according to claim 1 to 7, further comprising a heat energy irradiation unit as a heating unit.

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