KR101849999B1 - A multi head assembly for 3D printer comprising arrays of light sources and polygon mirror, and a scanning method therewith - Google Patents

Abstract

The present invention relates to a multi-head device of a stereolithography equipment and a multi-shaped planar scanning method using the same. More particularly, the present invention relates to a structure including a molding light source array module composed of a plurality of molding light sources and a polygon mirror And the combination of these can perform scanning of the shaping light beam at a high speed and can improve the precision of shaping through precise scanning control. It is also possible to increase the productivity by simultaneously molding or synchronizing a plurality of three- A multi-head device for stereolithography equipment and a method of forming a planar scanning method using the same are provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-head device for a stereolithography device having a shaped light source array and a polygon mirror, and a multi-shaped flat surface scanning method using the multi-

The present invention relates to a multi-head device of a stereolithography equipment and a multi-shaped planar scanning method using the same. More particularly, the present invention relates to a structure including a molding light source array module composed of a plurality of molding light sources and a polygon mirror And the combination of these can perform scanning of the shaping light beam at a high speed and can improve the precision of shaping through precise scanning control. It is also possible to increase the productivity by simultaneously molding or synchronizing a plurality of three- A multi-head device for stereolithography equipment and a method of forming a planar scanning method using the same are provided.

3D printing is one of the methods of manufacturing products. Since it uses a lamination method, the loss of material is smaller than that of conventional cutting, and relatively low manufacturing cost is required. In recent years, technology in this field has been recognized as a next generation production technology beyond prototype production. It is possible to increase the speed of production, increase the completeness of output (resolution), diversify usable materials, This is because accessibility has improved. There are various schemes of 3D printing such as SLA (Stereo Lithography Apparatus), SLS (Selective Laser Sintering) and FDM (Fused Deposition Modeling).

In accordance with the SLA system of the three-dimensional printing molding technology type, Korean Patent No. 1407048 (entitled " 3D line scan forming apparatus and molding method using the same, hereinafter referred to as prior art 1) The photo-curable resin to which light is irradiated by irradiating light to the water tank is laminated when a thin plate-like sheet is formed by hardening according to the shape of light, and a method of irradiating light in a line form And for this purpose, a configuration including a transferring rail and a line scanning optical head is disclosed.

KR 10-1407048 B1

In the prior art 1, the head adopts a line-based (X-axis) irradiation method for scanning the fluorescent light and moves the head directly to the corresponding position while sliding on the two- The first problem is that the control precision and the molding speed are poorer than in the method of controlling the optical path. Therefore, the relatively heavy head is directly moved, and vibrations are generated due to acceleration and deceleration of the head, The third problem is that there is a limitation in heightening the molding speed and the productivity of molding in comparison with the complexity of the structure because the multi-head cooperates to form a single molding.

In order to solve the above problems and to satisfy the needs, the present invention provides a stereolithographic light source unit for inputting N shaped shaping ray bundles into a light guide unit, wherein N pieces of shaping ray bundles are received, And a control unit for controlling the driving of the shaping light source unit and the light guide unit in conjunction with each other, and a control unit for controlling the driving of the shaping light source unit and the light guide unit in a one- Device.

Each of the N shaping beam bundles (k-shaped beam bundles, k = 1, 2, ... N) of the multi-head device of the stereolithography equipment of the present invention includes N shaping planes (k- (K = 1, 2, ... N) for each line scan (k = 1, 2, ..., N) , 2, ..., N) can be moved continuously or intermittently apart to allow light irradiation for stereolithography to be performed on the entire surfaces of the k-th formed surfaces (k = 1, 2, ..., N).

Further, the light guiding portion of the multi-head device of the stereolithography equipment of the present invention comprises N polygon mirrors (kth polygon mirror, k = 1, 2, ... N) K shaped light beams incident on the k-th polygon mirror, and a plurality of light reflecting surfaces provided with a predetermined number of light reflecting surfaces and having a polygon mirror axis in a direction parallel to the arrangement direction of the k- (K = 1, 2, ..., N) is reflected on one of the predetermined number of light reflection surfaces and is incident on the k-th formed plane (k = (K = 1, 2, ..., N) while rotating about the polygon mirror axis, wherein the kth polygon mirror (k = ... N) of the first and second motors.

Further, each of the N polygon mirrors of the multi-head device of the stereolithography equipment of the present invention can continue to rotate in one direction.

The shaping light source unit of the stereoscopic molding apparatus of the present invention includes N shaping light source array modules, and the N shaping light source array modules are each formed of the k-shaped shaping bundle (k = 1, 2, ..., N), wherein all of the plurality of shaping light sources of each of the N shaping light source array modules are driven in synchronization with each other, and the N shaping light sources All of the light from the plurality of shaping light sources of each of the light source array modules can be simultaneously incident on each of the N shaping planes.

In addition, each of the plurality of shaping light sources of the N shaping light source array modules of the multi-head device of the present invention includes an optical fiber laser, It can be either.

The multi-head device of the stereolithography equipment of the present invention may further include a shaping bundle incident angle correcting unit having a function of causing the k-shaped bundles of rays to vertically enter at all points of the k-th shaping plane, respectively .

The control unit of the multi-head apparatus of the stereoscopic molding apparatus of the present invention may further include a control unit for controlling the difference in path lengths required for the k-shaped ray bundle to reach each point of the k-shaped forming plane, The amplitude or frequency of the k-shaped bundle of rays may be controlled to compensate for the difference in energy density at each of the points caused by the difference in incident angle to the shaping plane.

(I) setting each of the k-th polygon mirror (k = 1, 2, ..., N) to a predetermined position, (ii) (K = 1, 2, ..., N), and each of the k-shaped bundles of rays generates the k-th shaped polygon mirror (k = 1, 2, ..., N) , N), (iii) starting to enter the k-shaped bundle of rays k (k) reflected on each of the k-th polygon mirrors (K = 1, 2, ..., N) for each of the k-th formed surfaces (k = (K = 1, 2, ..., N) for a predetermined period of time; (iv) (K = 1, 2, ..., N) in the step (iii) is controlled so as not to be irradiated to each of the k-th line scan ) Parallel to the arrangement direction of the k-shaped bundles of rays (K = 1, 2, ..., N) immediately after the k-th line scan (k = 1, 2, ..., N) in the step (iii) to a position stepped by a predetermined interval in a direction perpendicular to the direction (k = 1, 2, ..., N) is rotated by a predetermined angular displacement so as to cause the k-th line (k line scan) And repeating the steps (ii) and (v) until the scanning of the fluorescence is completed.

In the method of scanning a shaping plane of the present invention, after the step (vi), the kth polygon mirror (k = 1,2, ..., N) To prepare for rotation.

The scanning method of a shaping plane of the present invention is characterized in that after the step (vi), the kth polygon mirror (k = 1, 2, ..., N) To prepare for rotation in the direction of rotation.

(I) setting each of the k-th polygon mirror (k = 1, 2, ..., N) to a predetermined position, (ii) (k = 1, 2, ..., N), and the k-shaped bundles of rays (k = 1, 2, ..., N) K) of the k-shaped shaped light beams reflected at each of the k-th polygon mirrors (k = 1, 2, ..., N), (iii) (k = 1, 2, ..., N) for each k th shaping plane (k = 1,2, ..., N) Wherein the k-th line scan is performed while the k-th polygon mirror (k = 1, 2, ..., N) continues to rotate at a predetermined speed, (Iv) when scanning is completed on the entire surface of the k-th formed surface (k = 1, 2, ..., N) The k-th line in the step (iii) (K = 1, 2, ..., N) in the steps (ii) and (iii). ..., N continue to rotate in a predetermined unidirectional direction.

The scanning method of a shaping plane of the present invention is characterized in that after the step (iv), the kth polygon mirror (k = 1,2, ..., N) And preparing for rotation in a direction opposite to the direction of rotation in the second direction.

The scanning method of a shaping plane of the present invention is characterized in that after the step (iv), the kth polygon mirror (k = 1,2, ..., N) And preparing for rotation in the same direction as the direction of rotation in the second direction.

(K = 1, 2, 3, 4, 5, 6, 7, 8, 9) (K = 1, 2, ..., N) incident on the common polygon mirror are provided with a polygon mirror axis in a direction parallel to the arrangement direction of the first polygonal mirror bundle (K = 1, 2, ... N) while being incident on the k-shaped planes (k = 1, 2, ... N) of the common polygon Wherein the mirror performs continuous movement or spacing movement of the k-th line scan (k = 1, 2, ... N) while rotating around the polygon mirror axis .

Further, each of the common polygon mirrors of the multi-head device of the stereolithography equipment of the present invention can continuously rotate in one direction.

The shaping light source unit of the stereoscopic molding apparatus of the present invention includes N shaping light source array modules, and the N shaping light source array modules are each formed of the k-shaped shaping bundle (k = 1, 2, ..., N), wherein all of the plurality of shaping light sources of each of the N shaping light source array modules are driven in synchronization with each other, and the N shaping light sources All of the light from the plurality of shaping light sources of each of the light source array modules can be simultaneously incident on each of the N shaping planes.

In addition, each of the plurality of shaping light sources of the N shaping light source array modules of the multi-head device of the present invention includes an optical fiber laser, It can be either.

The multi-head device of the stereolithography equipment of the present invention may further include a shaping bundle incident angle correcting unit having a function of causing the k-shaped bundles of rays to vertically enter at all points of the k-th shaping plane, respectively .

The control unit of the multi-head apparatus of the stereoscopic molding apparatus of the present invention may further include a control unit for controlling the multi-head apparatus according to the present invention so that the difference in path length required for the k- the amplitude or frequency of the k-shaped bundle of rays may be controlled to compensate for the difference in energy density at each of the points caused by the difference in incident angle to the k-shaped plane.

(I) setting the common polygon mirror to a predetermined position; (ii) when the shaping light source unit is configured to scan the N pieces of shaping light bundles (k = 1, 2, , ..., N) and starting each of said k-shaped shaped beam bundles to be incident on an arbitrary reflective surface of said common polygon mirror, (iii) (K = 1, 2, ..., N) for each k th shaped planes (k = 1, 2, ..., N) for a predetermined period of time; (iv) the k-shaped bundles of rays k = (K = 1, 2, ..., N) in the step (iii) is controlled so as not to be irradiated to each of the k-th line scan lines (V) a predetermined distance in the direction perpendicular to the direction parallel to the arrangement direction of the k-formable ray bundles, (k-th line scan) immediately after the k-th line scan (k = 1, 2, ..., N) in the step (iii) (Vi) repeating the steps (ii) to (v) until the scanning of the crude fluorescence is completed over the entire surface of the k-th shaping plane And scanning the formed planar surface.

Further, in the method of scanning a shaping plane of the present invention, after the step (vi), the common polygon mirror may further include a step of preparing rotation in the same direction as the rotation direction in the step (v).

Further, in the method of scanning a shaping plane of the present invention, after the step (vi), the common polygon mirror may further include a step of preparing rotation in a direction opposite to the rotation direction in the step (v).

A method for scanning N shaped shaping planes, the method comprising the steps of: (i) setting the common polygon mirror to a predetermined position; (ii) ..., N) and starting each k k shaped beam bundle (k = 1, 2, ..., N) to be incident on any of the reflective surfaces of the common polygon mirror, (iii) (K = 1, 2, ..., N) reflected by the common polygon mirror are arranged for each of the k-th formed surfaces (k = Wherein the kth line scan is performed such that the common polygon mirror continues to rotate at a predetermined speed and the kth shaped ray bundle (k = 1, 2, ..., N) (Iv) when scanning is completed on the entire surface of the k-th formed surface (k = 1, 2, ..., N), the step (k = 1, 2, ..., N) in step iii) Subsequently a step of moving the end, and wherein (ii) said common polygon in step and (iii) the mirror is provided to continue to rotate in a predetermined way.

Further, in the method of scanning a shaping plane of the present invention, after the step (iv), the common polygon mirror is prepared to rotate in a direction opposite to the rotational direction in the step (ii) and the step (iii) .

Further, in the method of scanning a shaping plane of the present invention, after the step (iv), the common polygon mirror is prepared to rotate in the same direction as the rotation direction in the steps (ii) and (iii) .

Further, the stereolithography apparatus of the present invention is a stereolithography apparatus for forming a stereolithography product by forming and laminating a molding layer by receiving molding material, and the irradiation of the molding light ray on the molding surface is performed by a multi- Device can be used.

The present invention has a shaping light source array module composed of a plurality of shaping light sources to perform line scanning in one axial direction of a shaping plane so that the shaping speed can be made faster than that of a conventional scanning method The first effect is to perform stepping or continuous movement in the other axial direction from the line scan axis through the polygon mirror rotating in a single direction, and the irradiated position of the shaping ray bundle is a rotational angular velocity of the single or plural polygon mirrors And the rotational angular displacement, it is possible to reduce the vibration and noise generated from the head device, thereby improving the quality of the shaping layer formed on the N shaping planes. , Control of the output value of the shaping beam bundle, or application of the shaping beam incident angle correcting section, It has a third effect that by implementing the light output density, to increase the molding quality.

Further, the fourth effect is that a plurality of stereoscopic molding objects can be formed at the same time, and further, the plurality of molding operations can be synchronized or synchronized to further increase molding speed and molding productivity.

Further, the present invention can be applied to various types of stereolithography devices including SLA or SLS.

1 is a schematic view showing an embodiment in which the optical guide part of the multi-head device of the stereolithography equipment according to the present invention is formed into N polygon mirrors.
2 is a schematic view showing an embodiment in which a light guiding portion of a multi-head device of a stereolithography equipment of the present invention becomes a common polygon mirror.
3 is a schematic diagram showing an embodiment of a method of scanning a shaping plane using a multi-head device of a stereolithography equipment according to the present invention.
4 is a schematic view showing an embodiment in which a shaping bundle incident angle correcting unit is provided in a multi-head apparatus of a stereolithography equipment according to the present invention.
Fig. 5 is a schematic view showing an embodiment of a molding light source arrangement of the molded light source array module of the present invention. Fig.

The present invention relates to a stereolithographic light source unit for receiving N shaped shaping ray bundles and guiding each of N shaping ray bundles to a predetermined path so as to form a one-to-one correspondence to each of N shaping planes And a controller for controlling the driving of the shaping light source unit and the light guide unit in conjunction with each other as main components, and has a function of irradiating the crude fluorescence with a predetermined scanning pattern to all of the N shaping planes . (However, it is not excluded that some of the N shaping planes have a specific purpose and are not subjected to the group fluorescence irradiation)

The shaping ray bundle means that the shaping ray bundle is a combination of a plurality of shaping ray, and it is obvious that there is no limitation on the type and arrangement (arrangement) of shaping ray sources for each of plural shaping ray. When the plurality of shaping light beams enter the arbitrary plane, the shaping light beam bundle, which is a combination of the plurality of shaping light beams, when projected on the shaping plane, causes the beam spots of each of the plurality of shaping light beams to form a line ), Which can be referred to as a line scan (note that the term line scan refers to the scanning operation itself performed by a bundle of shaped beams generated from a plurality of shaped light sources incident on the shaping plane More concretely, a case where a plurality of shaping light beams are simultaneously irradiated on a shaping plane is referred to as simultaneous line scanning, and a case where a plurality of shaping light beams are respectively incident on a shaping plane with a time difference is referred to as a non- Scan, it is considered that, in view of molding speed, simultaneous line scan is more preferable.

Each of the N shaped shaping planes (k-shaped planes, k = 1, 2, ..., N) 1, 2,..., N) and N lines of scan (kth line scan, k = 1, 2, ... N) Light irradiation for stereolithography is performed on the entire surface of the k-th formed plane (k = 1, 2, ... N) by continuously moving or intermittently moving the k-th line scan (k = 1,2, ... N) .

In particular, as described later, the scanning pattern proposed in the present invention is a scanning pattern which is spaced by a predetermined distance in a direction (second direction) perpendicular to the arranging direction (first direction) of the k-shaped bundles of ray bundles (First pattern), or the line scan may be a pattern continuously formed along the second direction (second pattern). The former is to perform the next line scan at a position stepped by a predetermined distance after completion of one line scan. From the point of view of the output of the shaping light source, the former is performed by controlling the output discretely with respect to time, the latter being controlled so as to change continuously with respect to time.

As in the embodiment of the present invention shown in FIG. 3, the shaping light beam from the shaping light source may be irradiated in parallel with the shaping plane, but may be irradiated while forming a certain angle with the shaping plane to be. Since these proposals are intended to implement the required functionality using minimal components, it is also possible to use mirrors, prisms and other optical elements to alter or modify portions of the arrangement to make it more complex, It can be said that the constitution of changing by a certain degree is the same as or the same range as the constitution of the present invention.

The shaping plane means an area irradiated with a shaping bundle whose path is controlled in a multi-head apparatus of the stereolithography equipment of the present invention. The actual shaping plane may be in a state of being exposed directly to the outside, or blocked by a transparent member through which the shaping light can transmit, without being directly irradiated with shaping light. In addition, the molding plane may be expressed as an effective forming region in that energy is imparted to the molding ray to actually cause the action such as photo-curing or sintering hardening to occur in the molding plane region.

It is needless to say that the N shaping planes in the present invention are not constrained to constraint conditions such that they should be adjacent to each other or exist on the same plane.

The shaping light source unit of the present invention performs the function of making N pieces of shaping ray bundles enter into the optical guide unit. Specifically, each of the N shaping light source array modules includes N shaping light source array modules, and the N shaping light source array modules are arranged in a direction parallel to the arrangement direction of the k form light bundles (k = 1, 2, ... N) And includes a plurality of shaping light sources. As will be described later, it is considered that it is preferable that the arrangement direction of the k-shaped group of light rays and the direction of the k-th line scan are the same as the direction of the polygon mirror axis of the k-th polygon mirror (or the common polygon mirror).

In one embodiment of the present invention, all of the plurality of shaping light sources of each of the N shaping light source array modules are driven in synchronism with each other, and all of the grouping light from the plurality of shaping light sources of each of the N shaping light source array modules is N shaped shaping planes (However, simultaneous line scan is more preferable than non-simultaneous line scan in terms of molding speed, so simultaneous line scan can be called line scan.)

The shaping light source array module functions to generate shaping light beams and to enter the light guide sections to be described later. In the present invention, it is proposed that a plurality of shaping light sources constituting the shaping light source array module have various arrangements.

5, an embodiment in which the shaping light sources are arranged to constitute the shaping light source array module may be, for example, a linear array or a multi-row array as shown in Fig. 5 (a) The two-column arrangement shown, the three-column arrangement shown in Fig. 5 (c), etc.).

In particular, in the case of the multi-row arrangement of FIGS. 5 (b) to 5 (c), a function of performing two or three line scans simultaneously can be implemented through simultaneous control of multiple rows through the control unit, .

Further, as shown in Fig. 5 (d), it can be considered that the molding light sources in each row as a two-row arrangement are arranged in a zigzag manner (multi-row zigzag arrangement) as a whole.

5 (e) to 5 (f), a nonlinear multi-row array can be considered as another embodiment of the array module. Each of the plurality of formative light source bundles (constituted by one or two or more formative light sources) constituting one row may be spaced apart from one another, and the respective rows are arranged to be shifted from the adjacent columns so that the molding light sources are arranged to be zigzag .

The arrangement of the molding light source array module as described above should be determined comprehensively considering the shape of the molding, the molding speed, the molding material, the molding resolution, and the like.

With this configuration, the shaped ray bundles generated from the shaped light source array module can form a line scan. In determining the spacing between the plurality of shaping light sources, it is desirable that after one line scan is completed, the photocuring / sintering requirement level (specification) of the shaping material at all points on the line that make up the line scan shall. If the spacing is too wide, there will be a difference in the degree of photo-curing / sintering for each line for one line, and the molding quality will be degraded. If the spacing is too narrow, do. It is also considered that the space between the molding light sources can be increased when the output of the molding light source is large. It is preferable that the length of the molding light source array module is at least equal to or longer than the length of one side of the molding plane so that the molding time can be shortened by irradiating a length of one line scan corresponding to one side of the molding plane at a time It is because. In addition, the number of the molding light sources constituting the molding light source array module is automatically calculated when the distance between the molding light sources and the length of the molding light source array module are determined.

The shaping light source is a device that functions to generate shaping light rays. The shaping light can be selected by ultraviolet rays (UV lay), laser (laser), etc., as long as it has energy necessary for curing the molding material to be used. However, when a laser is used, not only high energy can be focused but its output intensity and ON / OFF control are easy, so that it is suitable for use as a shaping beam, which is preferable. The output and wavelength of the laser should be determined corresponding to the molding material used. As a molding light source for generating a laser, an optical fiber laser including a device such as a laser diode (LD), an LED, a VCSEL, or an optical fiber bundle may be applied, but the present invention is not limited thereto. Since a single-channel light beam is required, it is not necessarily required to use a single device, and various devices (for example, a relay module) having a function of combining and distributing a light beam (optical signal) can be used. It is also conceivable to design a configuration for improving the quality of the shaping light beam or for miniaturizing the head device by applying optical elements such as various optical modulation modules or focusing lenses or prisms. Since the shaping light source array module is composed of elements of a plurality of shaping light sources, the shape information of the stereolithography should also be constituted by being digitized and divided into predetermined unit information. The spacing between the molding light source elements should be set in consideration of the close relationship with the molding resolution as described above.

The control unit controls the driving of the shaping light source unit and the light guide unit interlockingly. The specific object to be controlled is on-off and output values of a plurality of shaping light sources constituting the shaping light source unit (shaping light source array module) . The irradiating position is specified with respect to the shaping plane of the shaping bundle according to the polygon mirror rotational angle control included in the light guide section, and based on the shaping layer image information, the shaping beam The drive of the bundle must be controlled. In this way, irradiation of the group of shaping rays to one shaping plane is completed and one shaping layer is formed, and the shaping layers are stacked to complete the stereolithography.

The control unit includes a processing unit for generating an appropriate control signal for the control variable and a driving unit for processing the control signal generated in the processing unit and generating driving of the corresponding component. The processing unit can be implemented by hardware such as a circuit, or can be configured by software such as a program. The on-off control of the shaping beam may take the form of controlling the on / off of the shaping light generating element-LD, LED, VCSEL or the like, and may selectively pass through the shaping light generated by the shaping light- But it is not limited to such a configuration.

The control unit controls the driving of the molding light source unit (molding light source array module), which means that a plurality of molding light sources are interlocked with each other. In particular, when synchronizing and controlling a plurality of shaping light sources, a k-shaped bundle of rays forming a k-th line scan enters into the k-th shaping plane at a time, through which a unit time , The so-called " transient line scan " can be completed with only the irradiation during the period of time required for photocuring / sintering of the k-shaped plane, . However, it is not necessary to exclude that each of the shaping light sources should be driven so as to realize " moving line scan "

The control of the light guide portion of the control portion is performed by controlling the rotation of the polygon mirror, and the main control variables are the rotational angular velocity, the rotational angular displacement, and the rotational angular acceleration of the polygon mirror. It is necessary for these control variables to follow up with a small error within a small lead time with respect to the control signal of the control section and it is preferable to use the electric control method for this purpose. More preferably, it is possible to use an electric servo-motor capable of realizing the rotational angular velocity, the rotational angular displacement, and the rotational angular acceleration corresponding to a control signal (electric signal) varying with time, no. The spacing (size) of the stepping is determined according to the rotation angle of the polygon mirror. If the value is too small, the patterning ray bundle is irradiated again on the area where the hardening has already proceeded due to line scan, , And if the value is too large, it should be considered that a part of the molding ray bundle is not irradiated.

The control unit can further perform the following functions. Control of the amplitude or frequency of each shaping ray forming the shaping ray bundle, which is required to control the amplitude of the path length necessary for the k-shaped shaping ray bundle to reach each point of the k- Or the amplitude or frequency of the k-shaped bundle of rays to correct the difference in energy density at each of the points caused by the difference in the angle of incidence of the k-shaped bundle of rays to the k- It is. In other words, when the shaping bundle is incident perpendicular to the shaping plane, the incidence area (beam spot size) is minimized, so that the shaping light output density becomes large. On the contrary, when the shaping beam is inclined at an oblique angle The incidence area (beam spot size) becomes large, so that the shaping light output density becomes small. However, since the degree of the action of the curing-light curing or powder sintering of the molding light to the molding material is proportional to the size of the molding light output density, a uniform molding light output density is ensured over the entire surface of the molding surface, In order to secure the quality of the layer, it is necessary to control the output value of the shaping beam as described above. In particular, when the head device of the present invention is enlarged, the energy loss degree of the shaping light ray will vary depending on the length of the light path required to reach each point of the shaping plane bundle. It is necessary.

In addition, the head device of the stereolithography equipment of the present invention may further include a shaping bundle incident angle correcting unit having a function of causing the bundles of shaping bundles to be incident perpendicularly to the shaping plane at all points forming the shaping plane. This is for uniformizing the shaping light output density as described above according to each incident point. The shaping ray bundle incident angle correcting unit in one embodiment is a lens (such as an F-theta lens) provided on the shaping plane, and although the incident angles of the bundles of shaping rays reflected from the light guiding unit are different for each point, It is needless to say that the present invention is not limited to such an example.

The light guide portion is provided at a predetermined position on the upper part of the N shaping planes, and has a function of guiding the N shaping beam bundles from the shaping light source portion to enter the N shaping planes, and a function of arranging N shaping beam bundles A step of stepping N line scans is implemented so that a missing part does not occur.

In relation to the present invention, two types of embodiments can be considered in relation to the light guide portion. In the first embodiment, the light guide portion is made up of N polygon mirrors. In the second embodiment, And one additional common polygon mirror.

≪ Embodiment 1 >

Referring to FIG. 1, with two shaping light source array modules for scanning two shaping planes and with the light guide portion shown for an embodiment (N = 2) comprising two polygon mirrors, The guide portion includes N polygon mirrors (kth polygon mirror, k = 1, 2, ... N).

The k-th polygon mirror (k = 1, 2, ..., N) is provided with a predetermined number of light reflecting surfaces on its side surfaces and a polygon mirror axis parallel to the arrangement direction of the k- do. The direction parallel to the arrangement direction of the k form light beam bundles is the same as the direction of the k-th line scan.

It is assumed that the above-mentioned k-shaped plane is actually supplied with the molding material. Once the scanning of the shaping bundles is completed on one k-shaped shaping plane, one shaping layer is formed, and these shaping layers are stacked to form a three-dimensional sphere. In the scanning of the k-th formed plane, it is preferable that there is no part where the k-shaped light beam is not irradiated, and the scanning is performed through the optimal path that minimizes the scanning time.

As a scanning method, two embodiments are proposed according to the rotation control pattern of the k-th polygon mirror of the light guide portion.

(K = 1, 2, ... N) incident on the k-th polygon mirror is reflected on one of the predetermined number of light reflection surfaces of the k-th polygon mirror to form an k-th formed plane (k = 1 (K = 1, 2, ... N), while the kth polygon mirror (k = 1, 2, ... N) is rotated about the polygon mirror axis , K-line scan (k = 1, 2, ... N). The embodiment in which the k-th line scan is made to move in the spaced apart manner is the scanning pattern of the first pattern described above, and the embodiment in which the k-th line scan is continuously moved is the scanning pattern of the second pattern described above.

Each of the N polygon mirrors may be set to continue to rotate in a unidirectional sense, which is meaningful for both the first pattern and the second pattern. One of the light reflection surfaces of the polygon mirror into which the k-shaped light beam bundle enters is continuously involved in one-time surface scanning with respect to the entire shaping plane. (Since the adjacent light reflection surface of the light reflection surface is the next surface Engage in scanning.)

Each of the k-th polygon mirrors (k = 1, 2, ..., N) is composed of a polygon mirror having a predetermined number of light reflecting surfaces and rotating about the polygon mirror axis. Such a polygon mirror should have a polygonal shape in the cross section perpendicular to the rotation axis, and the side surface should be configured to reflect the shaping light. More preferably, adopting a polygon mirror having a regular cross-sectional shape is advantageous because it is easy to precisely control the rotation speed and the rotation direction of the polygon mirror. The cross section of the polygon mirror can be a square, a regular pentagon, a regular hexagon, a regular octagon, but is not limited thereto. It is preferable that the length of the polygon mirror is not less than the length of the molded light source array module. The reflecting surfaces on the sides of the polygon mirror may be rectangular shapes having the same shape and size. In this case, the overall shape of the polygon mirror can be a regular prism. Further, the polygon mirror size must be determined according to parameters such as the installation angle of the rotation axis of the polygon mirror and the incidence angle of the shaping beam, or the overall size of the head device of the present invention. In one embodiment, each of the polygon mirrors constituting the light guide portion is implemented in the form of a square barrel. The rotary shaft of the polygon mirror can be installed at a predetermined position above the shaping plane in various ways.

Hereinafter, an example of applying the scanning pattern of the first pattern (spacing of line scan) among the methods of scanning N modeling planes using the multi-head device of the stereolithography equipment according to the first embodiment will be described.

Referring to FIG. 3, the stepping should be performed after one line scan is completely terminated, and further, after the completion of the separation, the next line scan must be performed. That is, the line spacing as well as the line scan must be performed discontinuously or discretely. In other words, when one line scan is performed while the k-th polygon mirror is stopped, and the line scan is completed, the k-th polygon mirror is rotated by a predetermined angle, then stopped, and the next line scan is performed . This method can apply a sufficient energy to the shaping beam irradiation point, which can set the thickness of the shaping layer to a large value, and can speed up the rotation speed of the polygon mirror during the stepping process.

In the stepping of the k-th line scan (k = 1, 2, ..., N), setting parameters such as spacing distance and spacing time interval can be considered, The thickness of the shaping layer, the type of shaping material, the spacing between the shaping light sources, and the like. In addition, the shaping bundle reaches the shaping plane and transfers energy (which is the driving force of photocuring or sintering) to the molding material, which is spread to a region having a predetermined area and depth rather than a specific point. If the output density of the shaping bundle is large, even if irradiation is performed for the same time, the energy is transferred over a wider area, so that the spacing distance of the k-th line scan can be made relatively large. Also, due to the presence of the spacing distance, the k-th line scan must be made for a predetermined time, which time should be determined in consideration of the output and spacing distance. (Of course, it is also possible to continuously move the k-th line scan)

Referring to FIG. 3, the scanning process of the first pattern is shown in a time-series manner as follows.

First, each kth polygon mirror (k = 1, 2, ..., N) is set at a predetermined position. The initial position of the k-th polygon mirror is adjusted so that the k-shaped bundle of rays can be incident on a predetermined portion of the edge of the shaping plane. (K = 1, 2, ..., N), and each k-shaped bundle of rays generates a k-th polygon mirror (k = ) On each of the reflection surfaces. (K = 1, 2, ..., N) reflected on each k-th polygon mirror (k = 1, 2, the kth line scan (k = 1, 2, ..., N) is performed for a predetermined time with respect to each of k = 1, 2, (K = 1, 2, ..., N) is controlled not to be irradiated on each of the k-th formed planes (k = 1, 2, ..., N) The kth line scan (k = 1, 2, ..., N) in the third stage is terminated. The control at this time may be such that the output off of a shaping light source of the shaping light source, the use of additional components such as a shutter, the use of a shielding film provided near the shaping plane, A method of lowering the output of the shaping beam bundle to such an extent that hardening or sintering of the molding material does not occur even if it is incident on the shaping plane can be considered. Fifth, the k-th line scan (k = 1, 2, ...) at the third step is performed at a position stepped by a predetermined interval in a direction perpendicular to the direction parallel to the arrangement direction of the k-shaped bundles of rays. The kth polygon mirror (k = 1, 2, ..., N) rotates by a predetermined angular displacement so that the k-th line scan (next k-th line scan) 6 (b)). Sixth, the second to fifth steps are repeatedly performed until the scanning of the fluorescent light is completed on the entire surface of the k-th formed plane (FIG. 3 (c)). Of course, it is obvious that the k-th polygon mirror needs to continue to rotate in a predetermined unidirection throughout the entire process. Seventh, after the sixth stage, the kth polygon mirror (k = 1,2, ..., N) may be prepared to rotate in the same direction as the rotation direction in the step (v) Can be prepared. This is because, after completing the irradiation with respect to one shaping plane, it may be rotated in the direction opposite to the rotation direction of the k-th polygon mirror at the next irradiation, immediately before irradiation.

Next, an example of applying the scanning pattern of the second pattern (spacing of line scan) among the methods of scanning N shaping planes using the multi-head device of the stereolithography equipment according to the first embodiment will be described.

The line scan is a method of continuously sweeping the shaping surface at a predetermined speed (this speed is a function relationship with the rotational angular velocity of the polygon mirror). It should be noted that if the velocity is too fast, it may not be possible to apply sufficient energy to the shaping beam bundle irradiating point. However, it is possible to consider settings such as increasing the output of the light source, or narrowing the spacing between the molding light source elements. In addition, the thickness of the shaping layer may be set small to reduce the required energy itself. By using the scanning pattern of this type, the polygon mirror can be continuously rotated without stopping, so that the vibration and noise generated in the rotation / stopping process of the polygon mirror can be reduced, thereby improving the shaping quality and working environment Considering the advantage of being able to This scanning method (second pattern) is performed by controlling so that the output of the shaping light source changes continuously with respect to time.

The scanning process of the second pattern is shown in a time-wise manner as follows.

First, each of the k-th polygon mirrors (k = 1, 2, ..., N) is set at a predetermined position. (K = 1, 2, ..., N) and the k-shaped bundles of rays (k = 1, 2, ..., N) (K = 1, 2, ..., N) of the k-th polygon mirror. (K = 1, 2, ..., N) reflected on each k-th polygon mirror (k = 1, 2, (k = 1, 2, ..., N) for each of k = 1, 2, ..., N, The polygon mirrors (k = 1, 2, ..., N) continue to rotate at a predetermined speed and move in a direction perpendicular to the direction parallel to the array direction of the k-shaped bundles of rays. (K = 1, 2, ..., N) in the third step, when scanning is completed for the entire surface of the k-th formed surface (k = ) Is completed.

In particular, in the second stage and the third stage, it is preferable that the k-th polygon mirror (k = 1,2, ..., N) continues to rotate in a predetermined unidirectional direction. = 1,2, ..., N) may further comprise preparing for rotation in the same or opposite direction as the rotation direction in the second step and the third step, Same as.

≪ Embodiment 2 >

Referring to FIG. 2, shown for an embodiment (N = 2) comprising two shaped light source array modules for scanning two shaping planes, the light guide portion comprises a common polygon mirror.

The common polygon mirror is provided with a predetermined number of light reflecting surfaces on its side surfaces and a polygon mirror axis in a direction parallel to the array direction of the k-shaped light beam bundles (k = 1, 2, ... N) do. The direction parallel to the arrangement direction of the k form light beam bundles is the same as the direction of the k-th line scan.

It is assumed that the above-mentioned k-shaped plane is actually supplied with the molding material. Once the scanning of the shaping bundles is completed on one k-shaped shaping plane, one shaping layer is formed, and these shaping layers are stacked to form a three-dimensional sphere. In the scanning of the k-th formed plane, it is preferable that there is no part where the k-shaped light beam is not irradiated, and the scanning is performed through the optimal path that minimizes the scanning time.

As a scanning method, two embodiments are proposed according to a rotation control pattern of a common polygon mirror of a light guide part.

(K = 1, 2, ... N) incident on the common polygon mirror are reflected on one of the predetermined number of light reflection surfaces to form the k-shaped planes (k = 1, 2, ... N (K = 1, 2, ..., N) while rotating about the polygon mirror axis, and forming the k-th line scan (k = ..., N). The embodiment in which the k-th line scan is made to move in the spaced apart manner is the scanning pattern of the first pattern described above, and the embodiment in which the k-th line scan is continuously moved is the scanning pattern of the second pattern described above.

The common polygon mirror can be set to continue to rotate in one direction, which is meaningful for both the first pattern and the second pattern. One of the light reflection surfaces of the polygonal mirror into which the k-shaped beam bundle is incident is continuously involved in one-time surface scanning for the entire k-shaped plane (k = 1,2, ..., N). The adjacent light reflective surface of the light reflective surface is involved in the next surface scanning for the entire k shaped planar surface.)

The common polygon mirror is composed of a polygon mirror having a predetermined number of light reflection surfaces and rotating about the polygon mirror axis as described above. Such a polygon mirror should have a polygonal shape in the cross section perpendicular to the rotation axis, and the side surface should be configured to reflect the shaping light. More preferably, adopting a polygon mirror having a regular cross-sectional shape is advantageous because it is easy to precisely control the rotation speed and the rotation direction of the polygon mirror. The cross section of the polygon mirror can be a square, a regular pentagon, a regular hexagon, a regular octagon, but is not limited thereto. It is preferable that the length of the polygon mirror is not less than the length of the molded light source array module. The reflecting surfaces on the sides of the polygon mirror may be rectangular shapes having the same shape and size. In this case, the overall shape of the polygon mirror can be a regular prism. Further, the polygon mirror size must be determined according to parameters such as the installation angle of the rotation axis of the polygon mirror and the incidence angle of the shaping beam, or the overall size of the head device of the present invention. In one embodiment, each of the polygon mirrors constituting the light guide portion is implemented in the form of a square barrel. The rotation axis (polygon mirror axis) of the common polygon mirror can be set at a predetermined position on the shaping plane by various methods.

Hereinafter, an example of applying the scanning pattern of the first pattern (spacing of line scan) among the methods of scanning N modeling planes using the multi-head device of the stereolithography equipment according to the first embodiment will be described.

The stepping should be done after one line scan has been completely terminated, and the next line scan must be done after the separation is completely terminated. That is, the line spacing as well as the line scan must be performed discontinuously or discretely. In other words, when one line scan is performed while the common polygon mirror is stopped, and when the line scan is completed, the common polygon mirror is rotated by a predetermined angle, then stopped, and the next line scan is performed. This method can apply a sufficient energy to the shaping beam irradiation point, which can set the thickness of the shaping layer to a large value, and can speed up the rotation speed of the polygon mirror during the stepping process.

In the stepping of the k-th line scan (k = 1, 2, ..., N), setting parameters such as spacing distance and spacing time interval can be considered, The thickness of the shaping layer, the type of shaping material, the spacing between the shaping light sources, and the like. In addition, the shaping bundle reaches the shaping plane and transfers energy (which is the driving force of photocuring or sintering) to the molding material, which is spread to a region having a predetermined area and depth rather than a specific point. If the output density of the shaping bundle is large, even if irradiation is performed for the same time, the energy is transferred over a wider area, so that the spacing distance of the k-th line scan can be made relatively large. Also, due to the presence of the spacing distance, the k-th line scan must be made for a predetermined time, which time should be determined in consideration of the output and spacing distance.

The scanning process of the first pattern is shown in a time-wise manner as follows.

First, a common polygon mirror is set at a predetermined position. The initial position of the common polygon mirror is adjusted so that the k-shaped bundle of rays is incident on a predetermined portion of the edge of the k-shaped plane.

Second, the shaping light source generates a k-shaped bundle of rays (k = 1, 2, ..., N), and each of the k-shaped bundles of rays begins to enter an arbitrary reflection plane of the common polygon mirror.

(K = 1, 2, ..., N) reflected by the common polygon mirror are arranged for each of the k-shaped shaping planes (k = 1, 2, ..., N) The kth line scan (k = 1, 2, ..., N) is performed for a predetermined time.

Fourth, the k-shaped bundles of rays (k = 1, 2, ..., N) are controlled so that they are not respectively irradiated to the k-shaped planes (k = 1, 2, ..., N) The k-th line scan (k = 1, 2, ..., N) is terminated.

Fifth, k-th line scan (k = 1, 2, ...) in the third stage is performed at a position stepped by a predetermined interval in a direction perpendicular to the direction parallel to the arrangement direction of the k- N), the common polygon mirror is rotated by a predetermined angular displacement so that the k-th line scan (next k-th line scan) immediately after the first k-th line scan is performed. The control at this time may be performed by using output components such as output off of the molded light source unit, use of additional components such as a shutter, utilization of a blocking film provided near the molding plane, And a method of lowering the output of the k-shaped bundle of rays to the extent that the bundle is incident on the k-shaped plane but does not cause hardening or sintering of the molding material.

Sixth, the second to fifth steps are repeatedly performed until scanning of the fluorescence is completed on the entire surface of the k-shaped flat surface. Of course, it is obvious that the k-th polygon mirror needs to continue to rotate in a predetermined unidirection throughout the entire process.

Seventh, after the sixth stage, the common polygon mirror can prepare for rotation in the same direction as the rotation direction in the fifth step, but can prepare for rotation in the other direction. This is because, after completing the irradiation for one shaping plane, it may be rotated in the direction opposite to the direction of rotation of the common polygon mirror in the previous irradiation process at the next irradiation time.

Next, an example of applying the scanning pattern of the second pattern (spacing of line scan) among the methods of scanning N shaping planes using the multi-head device of the stereolithography equipment according to the first embodiment will be described.

The line scan is a method of continuously sweeping the shaping surface at a predetermined speed (this speed is a function relationship with the rotational angular velocity of the polygon mirror). It should be noted that if the velocity is too fast, it may not be possible to apply sufficient energy to the shaping beam bundle irradiating point. However, it is possible to consider settings such as increasing the output of the light source, or narrowing the spacing between the molding light source elements. In addition, the thickness of the shaping layer may be set small to reduce the required energy itself. By using the scanning pattern of this type, it is possible to make the common polygon mirror continuously rotate without stopping, so that the vibration and noise generated in the rotation / stopping process of the common polygon mirror can be reduced, It is considered that there is an advantage in that This scanning method (second pattern) is performed by controlling so that the output of the shaping light source changes continuously with respect to time.

The scanning process of the second pattern is shown in a time-wise manner as follows.

First, a common polygon mirror is set at a predetermined position.

(K = 1, 2, ..., N), and the k-shaped bundles of rays (k = 1, 2, ..., N) each generate a common polygon mirror The light beam starts to be incident on an arbitrary reflection plane.

(K = 1, 2, ..., N) reflected on the common polygon mirror are respectively k (k = The kth line scan is performed while the common polygon mirror continues to rotate at a predetermined speed and is parallel to the arrangement direction of the k-shaped bundles of rays And is continuously moved in a direction perpendicular to one direction.

In particular, in the second and third stages, it is preferable that the common polygon mirror continuously rotates in a predetermined unidirectional direction.

(K = 1, 2, ..., N) in the third step, when scanning is completed on the entire surface of the k-shaped plane (k = Lt; / RTI > ends.

After the fourth step, the common polygon mirror may further include a step of preparing rotation in the same or opposite direction as the rotation direction in the second step and the third step, but the former is preferable as described above.

3: Polygon mirror shaft
10: K-shaped flat
10a: 1st molding plane
10b: second molding plane
11: k-shaped bundle of rays
11a: Bundle of Formation 1 ray
11b: Bundle of Formative Rays
12: k line scan
13: next k line scan
d: stepping distance
Shaped light source
15: Molded light source array module
15a: first shaping light source array module
15b: second shaping light source array module
16: Molded light source
20: light guide portion
21: kth polygon mirror
21a: first polygon mirror
21b: a second polygon mirror
22: Common polygon mirror
40:
50; Shaped light beam incident angle correction unit

Claims (29)

A shaping light source unit for inputting N pieces of shaping ray bundles into the light guide unit;
Wherein each of the N shaped shaping bundles (k shaped shaping bundles, k = 1, 2, ..., N) N lines in a one-to-one correspondence with respect to each of the N shaping planes to form an incidence angle of < RTI ID = 0.0 > A light guiding part having a function of guiding light; And
A control unit for controlling the driving of the shaping light source unit and the light guide unit in association with each other;
Lt; / RTI >
The light guide portion
(K = 1, 2, ... N) is moved continuously or intermittently by intermittently moving the k-th line scan (k = 1,2, ... N) , ≪ / RTI >
N polygon mirrors (kth polygon mirror, k = 1, 2, ... N)
Wherein the k-th polygon mirror comprises:
And a plurality of light reflecting surfaces provided on the side of the first light guide plate and having a polygon mirror axis in a direction parallel to the arrangement direction of the k-shaped light beam bundle and the k-
(K = 1, 2, ... N) incident on the k-th polygon mirror,
(K = 1, 2, ... N) while being reflected on one of the predetermined number of light reflection surfaces and entering the k-th formed plane (k = 1, 2,
The k-th polygon mirror (k = 1, 2, ... N)
(K = 1, 2, ... N) are spaced apart from each other by a predetermined distance in the direction perpendicular to the arrangement direction of the k-form light beam bundle and the k-form light beam bundle while rotating around the polygon mirror axis Wherein the pattern or line scan repeatedly performs a pattern along a direction in which the arrangement direction of the k-shaped bundle of rays and the direction of the k-shaped bundle of rays are perpendicular to each other.
delete delete The method according to claim 1,
Wherein each of the N polygon mirrors continues to rotate in a unidirectional manner.
The method according to claim 1,
The shaping light source unit includes N shaping light source array modules,
Wherein the N shaping light source array modules each include a plurality of shaping light sources arranged in a direction parallel to an arrangement direction of the k-shaped shaping bundles (k = 1, 2, ... N)
Wherein all of the plurality of shaping light sources of each of the N shaping light source array modules are driven in synchronism with each other and all of the group of fluorescent light from the plurality of shaping light sources of each of the N shaping light source array modules are simultaneously incident on each of the N shaping planes Wherein the multi-head device is a multi-head device.
The method of claim 5,
Wherein each of the plurality of shaping light sources of the N shaping light source array modules is any one of an optical fiber laser including an optical fiber bundle, a laser diode, an LED, and a VCSEL. Head device.
The method of claim 5,
Wherein the plurality of shaping light sources constituting the N shaping light source array modules are arranged in one of a row arrangement, a multi-row arrangement, a multi-row zigzag arrangement, and a nonlinear multi-row arrangement.

The method according to claim 1,
Further comprising a shaping bundle incident angle correcting unit having a function of causing each of said k-shaped shaping bundles to vertically enter at every point of said k-th shaping plane.

The method according to claim 1,
Wherein,
The angle of incidence of the k-shaped bundle of rays to the k-shaped plane, or the angle of incidence of the k-shaped bundle of rays to the k-shaped plane, Characterized in that the amplitude or frequency of the k-shaped bundle of rays is controlled to compensate for the difference in energy density in the multi-head device.

A method for scanning N modeling planes using a multi-head device of the stereolithography equipment of claim 1,
(i) setting the kth polygon mirror (k = 1, 2, ..., N) to a predetermined position;
(k = 1, 2, ..., N), and the k-shaped bundles of rays form k-shaped polygon mirrors (k = ..., N) on an arbitrary reflecting surface of each of the plurality of reflecting surfaces.
(k = 1, 2, ..., N) reflected from each of the k-th polygon mirrors (k = 1, 2, (K = 1, 2, ..., N) so that the output of the shaping light source varies discretely with respect to time for each of the planes (k = 1, N) for a predetermined period of time;
(iv) the k-shaped bundles of rays (k = 1, 2, ..., N) are controlled such that they are not respectively irradiated onto the k-th formed planes (k = terminating the k-th line scan (k = 1, 2, ..., N) in step (iii);
(v) a k-th line scan (k = 1, 2, 3) in the step (iii) is performed at a position stepped by a predetermined interval in a direction perpendicular to a direction parallel to the arrangement direction of the k- (K = 1, 2, ..., N) is rotated by a predetermined angular displacement so that a k-th line scan (next k-th line scan) ;
(vi) repeating the steps (ii) to (v) until the scanning of the fluorescent light is completed over the entire surface of the k-th shaping plane;
And scanning the patterned planar surface.

The method of claim 10,
Wherein the k-th polygon mirror (k = 1, 2, ..., N) after step (vi) comprises preparing for rotation in the same direction as the rotation direction in the step (v) And scanning the shaping plane.

The method of claim 10,
The step (vi) further comprises the step of preparing the rotation of the k-th polygon mirror (k = 1, 2, ..., N) in a direction opposite to the rotation direction in the step (v) And scanning the shaping plane.

A method for scanning N modeling planes using a multi-head device of the stereolithography equipment of claim 1,
(i) setting the kth polygon mirror (k = 1, 2, ..., N) to a predetermined position;
(ii) the shaping light source portion generates the k-shaped shaping ray bundles k = 1, 2, ..., N, and each of the k-shaped ray bundles k = Starting incident on any of the reflective surfaces of each of the k-th polygon mirror (k = 1, 2, ..., N);
(k = 1, 2, ..., N) reflected from each of the k-th polygon mirrors (k = 1, 2, 1, ..., N) for each of the planes (k = 1, 2, ..., N), and the kth line scan (K = 1, 2, ..., N) is continuously rotated at a predetermined speed so that the output of the shaping light source continuously changes with respect to time, And moving in a direction perpendicular to the direction;
(iv) when scanning is completed on the entire surface of the k-th formed surface (k = 1, 2, ..., N), the k-th line scan (k = 1,2, ..., , N) is terminated;
Lt; / RTI >
Wherein the kth polygon mirror (k = 1, 2, ..., N) continues to rotate in a predetermined unidirectional direction in the steps (ii) and (iii).

14. The method of claim 13,
Wherein the k-th polygon mirror (k = 1, 2, ..., N) is arranged to rotate in a direction opposite to the rotation direction in the steps (ii) and (iii) The method of any of the preceding claims, further comprising:

14. The method of claim 13,
Wherein the kth polygonal mirror (k = 1, 2, ..., N) is arranged to rotate in the same direction as the rotation direction in the steps (ii) and (iii) The method of any of the preceding claims, further comprising:
The method according to claim 1,
Wherein the light guide portion includes a common polygon mirror,
Wherein the common polygon mirror has a predetermined number of light reflection surfaces on its side surfaces and a polygon mirror axis in a direction parallel to the arrangement direction of the k-shaped light beam bundles (k = 1, 2, ... N) Installed,
(K = 1, 2, ..., N) incident on the common polygon mirror are reflected on one of the predetermined number of light reflection surfaces to form the k- ..., N), forming the k-th line scan (k = 1, 2, ... N)
Wherein the common polygon mirror performs continuous movement or spacing movement of the k-th line scan (k = 1, 2, ... N) while rotating around the polygon mirror axis. .

18. The method of claim 16,
Wherein each of said common polygon mirrors continues to rotate in a unidirectional manner.

18. The method of claim 16,
The shaping light source unit includes N shaping light source array modules,
Wherein the N shaping light source array modules each include a plurality of shaping light sources arranged in a direction parallel to an arrangement direction of the k-shaped shaping bundles (k = 1, 2, ... N)
Wherein all of the plurality of shaping light sources of each of the N shaping light source array modules are driven in synchronism with each other and all of the group of fluorescent light from the plurality of shaping light sources of each of the N shaping light source array modules are simultaneously incident on each of the N shaping planes Wherein the multi-head device is a multi-head device.

19. The method of claim 18,
Wherein each of the plurality of shaping light sources of the N shaping light source array modules is any one of an optical fiber laser including an optical fiber bundle, a laser diode, a VCSEL, and an LED. Multi-head device.

19. The method of claim 18,
Wherein the plurality of shaping light sources constituting the N shaping light source array modules are arranged in one of a row arrangement, a multi-row arrangement, a multi-row zigzag arrangement, and a nonlinear multi-row arrangement.
18. The method of claim 16,
Further comprising a shaping bundle incident angle correcting unit having a function of causing each of said k-shaped shaping bundles to vertically enter at every point of said k-th shaping plane.
18. The method of claim 16,
Wherein,
The angle of incidence of the k-shaped bundle of rays to the k-shaped plane, or the angle of incidence of the k-shaped bundle of rays to the k-shaped plane, Characterized in that the amplitude or frequency of the k-shaped bundle of rays is controlled to compensate for the difference in energy density in the multi-head device.
A method of scanning N shaped planes using a multi-head device of a stereolithography device according to claim 16,
(i) setting the common polygon mirror to a predetermined position;
(ii) the shaping light source section generates the k-shaped shaping ray bundles (k = 1, 2, ..., N), and each of the k-shaped forming ray bundles is incident on an arbitrary reflecting surface of the common polygon mirror Starting a step;
(k = 1, 2, ..., N) reflected from the common polygonal mirror are arranged in the k-th formed planes (k = Performing a kth line scan (k = 1, 2, ..., N) for a predetermined time such that the output of the shaping light source varies discretely with respect to time;
(iv) the k-shaped bundles of rays (k = 1, 2, ..., N) are controlled such that they are not respectively irradiated onto the k-th formed planes (k = terminating the k-th line scan (k = 1, 2, ..., N) in step (iii);
(v) a k-th line scan (k = 1, 2, 3) in the step (iii) is performed at a position stepped by a predetermined interval in a direction perpendicular to a direction parallel to the arrangement direction of the k- ..., N), the common polygon mirror is rotated by a predetermined angular displacement so that a k-th line scan (next k-th line scan) is performed.
(vi) repeating the steps (ii) to (v) until the scanning of the fluorescent light is completed over the entire surface of the k-th shaping plane;
And scanning the patterned planar surface.

24. The method of claim 23,
The method of any preceding claim, further comprising, after step (vi), preparing the common polygon mirror for rotation in the same direction as the rotation direction in the step (v).
24. The method of claim 23,
The method of any of the preceding claims, further comprising, after step (vi), preparing the common polygon mirror for rotation in a direction opposite to the rotation direction in step (v).
A method of scanning N shaped planes using a multi-head device of a stereolithography device according to claim 16,
(i) setting the common polygon mirror to a predetermined position;
(ii) the shaping light source portion generates the k-shaped shaping ray bundles k = 1, 2, ..., N, and each of the k-shaped ray bundles k = Starting to be incident on an arbitrary reflecting surface of the common polygon mirror;
(k = 1, 2, ..., N) reflected from the common polygonal mirror are arranged in the k-th formed planes (k = (K = 1, 2, ..., N) for the k-th line scan, wherein the k-th line scan is performed while the common polygon mirror continues to rotate at a predetermined speed, And continuously moving in a direction perpendicular to a direction parallel to the arrangement direction of the k-shaped bundles of rays so that the output changes continuously with respect to time;
(iv) when scanning is completed on the entire surface of the k-th formed surface (k = 1, 2, ..., N), the k-th line scan (k = 1,2, ..., , N) is terminated;
Lt; / RTI >
Wherein in the step (ii) and the step (iii), the common polygon mirror continues to rotate in a predetermined unidirectional direction.

27. The method of claim 26,
Wherein the common polygon mirror further comprises a step of preparing for rotation in a direction opposite to the rotation direction in the steps (ii) and (iii) after the step (iv) Way. 27. The method of claim 26,
Wherein the common polygon mirror further comprises a step of preparing rotation in the same direction as the rotation direction in the steps (ii) and (iii) after the step (iv) Way.
A stereolithography apparatus for forming a stereolithography product by forming a molding layer by supplying molding material and laminating the same,
Characterized in that the inspection of the shaping planes of the shaping beam is performed by using a multi-head device of the stereolithography equipment according to any one of claims 1, 4 to 9, and 16 to 22, .

Images