JP2746235B2 - Photocuring molding method and molding apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method and a molding apparatus for a photocurable molded product formed by performing optical scanning on a photocurable resin.

[0002]

2. Description of the Related Art As a photo-curing molding method using a photo-curing resin, there is, for example, a method described in JP-A-5-337951. FIG. 3 is a schematic configuration diagram for explaining the photo-curing molding method, and shows a tank 1 containing a photo-curing resin liquid 2.
A table 3 which is moved up and down is provided inside, and a projector 7 as an ultraviolet laser light source is disposed on one side above the photo-curable resin liquid 2, and the laser light L emitted from the projector 7 The table 3 is driven by a deflecting mirror 8 driven in a two-dimensional direction by a driving mechanism 9.
The upper photocurable resin liquid is scanned in a plane direction. The projector 7 and the deflection mirror 8 are configured to be synchronously controlled by a control circuit 10.

In such a photocuring molding apparatus, CAD
(Computer Aided Design) and X-ray CT (Computer tom
3D model obtained in the horizontal direction is sliced in the horizontal direction, and the projector 7 and the deflecting mirror 8 are controlled by the control circuit 10 based on the pattern image obtained from the sliced image.
Is controlled, the laser light L is scanned in a predetermined pattern on a layer region of the photocurable resin liquid 2 on the table 3 having a predetermined depth. The cured resin liquid 2 is cured. When the scanning and curing of one layer are completed, the table is moved downward by a dimension of about several tens μm to several hundreds μm, and the next laser light scanning is performed in that state. By repeating this operation while sequentially lowering the table 3, the cured resin patterns of the respective layers are vertically stacked, and a three-dimensional molded article M of the photocured resin is formed.

[0004]

However, a molded article manufactured by such a photo-curing molding method is a general resin, for example, A resin, due to the characteristics of the material of the photo-curable resin.
There is a problem that its mechanical strength is considerably lower than that of BS resin or the like. In particular, the bonding between the laminated resin layers is weak, and the molded article is extremely damaged by peeling between the layers. In this case, if the output of the laser beam is increased, the curing of the photocurable resin is promoted and the strength of the molded article can be increased.However, in this method, the photocurable resin scanned by the laser beam becomes deeper than necessary. It is hardened, and it becomes difficult to produce a molded article with fine dimensional accuracy.

[0005] It is an object of the present invention to provide a photo-curing mold that can be manufactured with fine dimensional accuracy while increasing mechanical strength.
An object of the present invention is to provide a method and an apparatus for manufacturing a mold .

[0006]

[0007]

According to the present invention, there is provided a method for forming a photocurable molded article, the method comprising disposing a photocurable resin article above a tank containing a photocurable resin liquid.
In the hopper while vibrating the mesh-shaped hopper
A step of mixing wood in the photocurable resin liquid, by scanning the laser beam in the predetermined pattern to the layer of a predetermined depth of the photocurable resin liquid reinforcing material is mixed, a photocurable resin liquid of the layer And a step of lowering the cured resin and the photocurable resin liquid by a depth of one layer, and applying a laser beam again to the depth layer for the dropped photocurable resin liquid. Scanning with the pattern described above, and curing the photocurable resin liquid of the layer.

The photocuring molding apparatus of the present invention further comprises a tank containing a photocurable resin liquid, a table installed in the photocurable resin liquid and moved up and down, and the photocurable resin on the surface of the table. Laser light scanning means for scanning the resin liquid with laser light in a plane direction, and means for mixing a reinforcing material into the photocurable resin liquid are provided. Especially,
The means for mixing the reinforcing material includes a mesh-shaped hopper located above the tank, and a vibrator for vibrating the hopper, and when the hopper is vibrated by the vibrator, the reinforcing material in the hopper is passed through the mesh to light-curing resin. It is configured to drop into the liquid.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional configuration diagram illustrating a schematic configuration of a photocurable molding apparatus according to the present invention. A photocurable resin liquid 2 is put in a tank 1, and a table 3 which is vertically moved by a vertical movement mechanism (not shown) is installed in the tank 1 in a state where it is submerged in the photocurable resin liquid 2. Have been. A hopper 4 whose lower surface is formed in a mesh shape is disposed at an upper opening position of the tank 1, and a reinforcing material 5 made of fine carbon fibers or the like is provided in the hopper 4.
Is inserted. The mesh of the hopper 4 does not fall through the mesh when the hopper is at rest, but when the hopper 4 is vibrated, the reinforcing material 5 does not fall.
Is dropped into the tank 1 through the mesh. Further, a vibrator 6 is connected to the hopper 4, and the hopper 4 is vibrated by the vibrator 6.

A projector 7 which is a laser light source for emitting ultraviolet laser light L is disposed on one side above the tank 1, and a mirror drive is provided above the photocurable resin liquid 2 in the tank 1. By the mechanism 9, the laser light L
And a deflection mirror 8 that reflects the light and deflects the light in a two-dimensional plane. The projector 7, the mirror driving mechanism 9, and the vibrator 6 are connected to a control circuit 10. The vibrator 6 is vibrated by the control of the control circuit 10. Thus, the laser beam L from the projector 7 can be scanned by the deflecting mirror 8 in a two-dimensional plane with a required pattern.

In order to manufacture a photo-cured molded article using the photo-cured molding apparatus having this configuration, the height of the table 3 in the tank 1 is set at a predetermined position, and the liquid level of the photo-cured resin liquid 2 is stabilized. When the vibrator 6 is driven to vibrate the hopper 4, the reinforcing material 5 in the hopper 4 drops into the tank 1 and is immersed in the photo-curable resin liquid 2. Generally, since the photocurable resin liquid has a large viscosity, the reinforcing material 5 is not immediately precipitated, so that the reinforcing material 5 is suspended in the photocurable resin liquid 2. In this state, the three-dimensional model obtained from CAD, X-ray CT or the like is sliced in the horizontal direction, and the control circuit 1 is sliced based on the pattern image obtained from the slice image.
0 controls the projector 7 and the deflecting mirror 8, the laser light L is applied to the photocurable resin liquid 2 on the surface of the table 3.
Is scanned in a layer pattern having a depth of a predetermined pattern, so that the photocurable resin liquid 2 in the scanned area of the laser light L
Is cured.

As described above, when the scanning and curing of one layer is completed, the table 3 is moved downward by a dimension of about several tens μm to several hundreds μm, and the scanning of the next laser beam L is performed in this state. The same is done. Also in this case, the reinforcing material in the photocurable resin liquid 2 is sequentially taken into the photocured resin. By repeating this operation while sequentially lowering the table 3, the cured resin patterns of the respective layers are vertically stacked, and a three-dimensional molded article M of the photocured resin is formed.

Therefore, the photocured molded article M to be produced
As shown in a partially enlarged view in FIG. 2, the reinforcing material 5 is mixed in the cured resin 2A as a whole. Is increased. In particular, among the reinforcements 5 to be taken in, some of them are buried in one layer and others are buried in the layers above them. The upper and lower layers extend between the layers of the photocurable resin 2A adjacent to each other, and the upper and lower layers are connected to each other by the reinforcing material 5. Thereby, the bonding strength between the layers is also increased, and separation between the layers is prevented.

[0014] Even if the output of the laser beam to be scanned is set to be slightly higher, excess laser beam energy exceeding the energy contributing to photo-curing is absorbed or diffused by the reinforcing material 5, so that the photo-curing is performed. The resin liquid 2 is not hardened to an unnecessary depth, and the dimensional accuracy of the molded article is not degraded.

In the above embodiment, carbon fibers are used as the reinforcing material. However, powder or granular material such as copper powder or iron sand may be used. In addition, by using a conductive reinforcing material, it is possible to make the molded article have an electromagnetic shielding ability,
This is extremely effective for molding of countermeasure parts.

[0016]

As described above, according to the present invention, when a photocurable resin liquid is cured into a layer by laser light and laminated to form a photocurable molded product, the photocurable resin liquid is filled with the liquid.
Vibrating the mesh-like hopper placed above the
Since the reinforcing material in the hopper is mixed with the photo-curing resin liquid , the photo-cured molded product that has been cured and laminated has its mechanical strength increased by the reinforcing material, and especially the reinforcement that extends between the laminated layers. The material can prevent peeling between layers,
It is possible to obtain a photo-cured molded article having excellent mechanical strength.
In addition, even when the output of the laser beam when curing the photocurable resin liquid is increased, the excess energy is absorbed or scattered by the reinforcing material, so that the curing is not performed to an unnecessary depth, and the dimensional accuracy is improved. A high photocurable molded article can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional configuration diagram of an embodiment of a photocuring molding apparatus according to the present invention.

FIG. 2 is a cross-sectional view schematically illustrating a cross-sectional structure of a photocured molded article manufactured according to the present invention.

FIG. 3 is a cross-sectional view illustrating a schematic configuration of a conventional photocuring molding apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Photocurable resin liquid 3 Table 4 Hopper 5 Reinforcement material 6 Vibrator 7 Projector 8 Deflection mirror 9 Mirror drive mechanism 10 Control circuit L Laser light M Modeling

Claims (2)

(57) [Claims] 1. A photo-curable resin liquid is disposed above a tank containing the liquid.
Vibrating the placed mesh-shaped hopper
A step of mixing of material in the photocurable resin liquid, by scanning the laser beam in the predetermined pattern to the layer of a predetermined depth of the reinforcement photocurable resin liquid are mixed is, in the layer photocurable resin A step of curing the liquid, a step of lowering the cured resin and the photocurable resin liquid by a depth of one layer, and applying a laser beam again to the depth layer for the dropped photocurable resin liquid. scanned in the required pattern, preparation of the photocurable molding material which comprises a step of curing the photocurable resin liquid of the layer
How . 2. A tank containing a photocurable resin liquid, a table installed in the photocurable resin liquid and moved up and down,
Provided in a planar direction with respect to the light curing resin liquid on the surface of the table and the laser beam scanning means for scanning the laser beam, and means for mixing the reinforcing material to said photocurable resin liquid, wherein the strong
The means for mixing the chemicals is a net located above the tank.
Eye-shaped hopper and vibrator to vibrate this hopper
When the hopper is vibrated by the vibrator,
The reinforcing material in the hopper is dropped into the photo-curing resin liquid through the mesh.
An apparatus for producing a photo-cured molded product , characterized in that: