JPH04329119A - Light shaping device - Google Patents

Abstract

PURPOSE:To separate easily a solid molded product from the light shaping device, by a method wherein a solid shaped product is stuck to this device and formed, the device possesses a plate which is detachable easily from a base frame, the base frame separtated from the plate is heated, heat is applied temporarily to an adhesive surface of the plate to the solid shaped product and an adhesive surface layer is softened. CONSTITUTION:A solid shaped product 1 is stuck to a plate 6 of a base board 4 and formed in a stepped layer, which is in a spring 5 structure and detachable easily to a base frame body 11 of the base board 4 integrated with an actuator. The solid shaped product 1 manufactured on the plate 6 can be removed easily from a light shaping device main body by removing the plate 6 from the base frame body 11. Then when the surface of a plate 8 is heated at a stretch by a burner 7, an interfacial part 9 of the solid shaped product 1 is temperature- risen, attained to a softening point and removal of the solid shaped product 1 from the plate 6 becomes possible by applying only a little external force to the solid shaped product 1.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a stereolithography device, and more specifically, the present invention relates to a stereolithography device, and more specifically, the present invention utilizes the temperature softening of a light (ultraviolet) curable resin to easily produce a three-dimensionally shaped article from a base plate as a substrate. This invention relates to a stereolithography device that can be detached at any time.

0002

BACKGROUND OF THE INVENTION In recent years, it has been considered to create an actual article using resin directly from CAD graphic data and examine the design and mechanical interference.

[0003] As a device for creating three-dimensional shapes of such articles, The Review of Scientific
icInstruments(USA Vol.52
No. 11) “Automatic me
thod for fabri-cating a t
hree-dimensional plastic
model with photo-hardenin
g polymer” and JP-A-62-35
No. 966 (International Classification G06F 15/60) ``Method and apparatus for creating three-dimensional objects'' and other stereolithography devices applying various inventions have been proposed. For example, in FIG. 5, the stereolithography apparatus sequentially moves the base plate 4 in the photocurable resin liquid in the Z-axis direction using the moving means 3, and irradiates ultraviolet light in the XY-axis directions at each stage of the movement. By this, a part of the photocurable resin liquid on the base plate 4 is cured, and the cured parts are sequentially laminated to form a desired shape.

In these conventional techniques, the base plate 4 moves up and down at regular intervals to attach and form the desired three-dimensional object 1.
and a mechanical part as a moving means 3 for raising and lowering this base plate are integrated, so when the three-dimensional molded object 1 created on the base plate 4 is removed from the base plate 4,
A sharp knife or the like was pressed against the attachment surface of the three-dimensionally shaped article 1 and the base plate 4, and the article was separated from the base plate 4 by force.

[0005]

[Problems to be Solved by the Invention] However, in the above method, the cutter does not enter the attachment surface between the three-dimensionally shaped article and the base plate, which may damage the three-dimensionally shaped article, or even break the three-dimensionally shaped article, resulting in damage to the three-dimensionally shaped article. There were cases where it was not possible to take out the shaped article.

[0006]

[Means and effects for solving the problems] The present invention has been made in view of the above-mentioned problems.The present invention sequentially moves a base plate in a photocurable resin liquid in the Z-axis direction using its moving means, and In stereolithography equipment, a part of the photocurable resin liquid on the base plate is cured by irradiating ultraviolet light in the XY-axis directions at each stage, and the cured parts are sequentially stacked to form the desired shape. The plate is a stereolithography device that includes a base frame that is moved in the Z-axis direction by a moving means, and a plate with good thermal conductivity that is detachably attached to the base frame.

That is, the present invention has a plate on which a three-dimensionally shaped article is attached and can be easily attached and detached from a base frame, and also heats the plate that is separated from the base frame to temporarily attach the surface to which the three-dimensionally shaped article is attached. Heat is applied to soften the adhering surface layer, allowing the three-dimensionally shaped article to be easily removed from the plate.

[0008]

[Example] Fig. 1 shows a configuration diagram of an embodiment of the stereolithography apparatus according to the present invention, Fig. 2 shows a perspective view of the main part showing the state of use, and Fig. 3 shows a cross-sectional view of the main part showing the plate attachment/detachment structure. . This embodiment will be described below with reference to FIGS. 1, 2, and 3.

The stereolithography apparatus H sequentially moves the base plate 4 in the vertical (Z-axis) direction in a light (ultraviolet) curable resin liquid using the vertical movement control device 3, and applies ultraviolet light at each stage of the movement. A portion of the photocurable resin liquid on the base plate 4 is cured by irradiating it in the horizontal (XY axis) direction by the horizontal movement control device 10, and the cured portions are sequentially laminated to form a desired shape.

That is, the three-dimensionally shaped article 1 is placed in a liquid photocurable resin tank 2 and is attached to a base plate 4 which is moved up and down at regular intervals by an actuator controlled by a vertical movement control device 3 to form a stepped layer. That is why it is done.

In this embodiment, the plate 6 of the base plate 4, which can be easily attached and detached, has a spring 5 structure shown in FIG. 3, for example, on the base frame 11 of the base plate 4 integrated with the actuator.
The three-dimensionally shaped article 1 is formed into an adhering step layer. The three-dimensional molded article 1 produced on the plate 6 can be easily removed from the stereolithography apparatus main body by removing the plate 6 from the base frame 11. The three-dimensionally shaped article 1 is attached and formed on the removed plate 6, but in order to separate the plate 6 and the three-dimensionally shaped article 1, the plate surface 8 is heated at once with a burner 7, etc., as shown in FIG. 4, which shows the usage state. do. The applied heat is transmitted from the plate surface 8 to the interface 9 with the three-dimensionally shaped article 1.

The temperature of the interface part 9 of the three-dimensionally shaped article 1 made of a light (ultraviolet) curable resin rises to a temperature softening point (approximately 50° C. for urethane acrylate resin, approximately 7° C. for epoxy resin).
0-150°C). At this time, the three-dimensionally shaped article 1 can be removed from the plate 6 by simply applying a small amount of external pressure.

The heat applied to the three-dimensional modeled article 1 is instantaneously applied to the interface portion 9 and is removed from the plate 6 before the heat is conducted to the interior of the three-dimensional modeled article 1, so that the entire three-dimensional modeled article 1 is There is no thermal deformation.

Furthermore, if a material with good thermal conductivity is used for the plate 6, such as a copper material or an aluminum material, the time effect will be greater. Furthermore, if a temperature sensor is embedded in the surface of the heated plate 6 on which the three-dimensionally shaped article 1 is formed and the temperature is controlled, the three-dimensionally shaped article 1 can be removed from the plate 6.
Needless to say, it is possible to control the time to leave without wasting time.

[0015]

As described above, the stereolithography apparatus according to the present invention has a structure in which the vertical movement mechanism components and the flat plate for producing the three-dimensionally modeled article can be easily separated, and the light (ultraviolet) curable resin is Since it utilizes softening at a constant temperature, the three-dimensionally shaped article can be easily removed from the stereolithography device without damaging it, and the quality of the three-dimensionally shaped article produced with the stereolithography device can be improved. It has the effect of

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a stereolithography apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of main parts showing a state of use.

FIG. 3 is a cross-sectional view of a main part showing a structure for attaching and detaching a plate.

FIG. 4 is a schematic configuration diagram of a stereolithography apparatus using a conventional method.

FIG. 5 is a side view showing a state in which the three-dimensionally shaped article is removed from the plate.

[Explanation of symbols]

1 Three-dimensional shaped article 2. Light (ultraviolet) curable resin tank 3 Vertical movement control movement device 4 Base plate 5 Spring 6 Plate 8 Plate surface 9 Interface part 11 Base frame

Claims (1)

[Claims] Claim 1: By sequentially moving the base plate in the photocurable resin liquid in the Z-axis direction using the moving means and irradiating ultraviolet light in the XY-axis directions at each stage of the movement, the light on the base plate is In a stereolithography device that cures a portion of a curable resin liquid and sequentially laminates the cured portions to form a desired shape, the base plate includes a base frame body that is moved in the Z-axis direction by a moving means, and this base. A stereolithography device consisting of a plate with good thermal conductivity that is removably attached to a frame.