JP2001001408A - Method and apparatus for shaping three dimensional solid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly apply an adhesive in an atomized state and provide a three dimensional cube shaping method wherein an electrostatically attracted sheet is not peeled off by execution of an adhesive applicating process. SOLUTION: This apparatus successively laminates a plurality of sheets through an adhesive-applicating process wherein an electrostatically attracted sheet S is pasted to obtain a three dimensional cube of a specific shape. In this case at the time of pasting, a pasting part or its neighborhood is again electrostatically charged by corona charging devices 22 and 22. Further, a pasting tool 72 comprises an adhesive feed nozzle wherein the adhesive is fed by pressurized air and an air injection nozzle wherein compressed air is injected, and an opening part of the adhesive feed nozzle and an injection pore of the air injection nozzle are located in proximity to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method for forming a three-dimensional solid having a predetermined shape by sequentially laminating a plurality of sheets, and a three-dimensional solid forming apparatus used for carrying out the forming method. .

[0002]

2. Description of the Related Art A sheet laminating method is known as one of methods for forming a three-dimensional model, that is, a three-dimensional solid. This laminating method is available from Helisys of the United States in International Publication Number WO9.
No. 7/39903 proposes a shaping apparatus used for carrying out the sheet laminating method, in which a special sheet coated with an adhesive is cut into a model part having a predetermined shape using a carbon dioxide laser. And a laminating device for laminating the cut model portions. Further, as another lamination method, for example, Japanese Unexamined Patent Publication No. 7-195
A molding method as disclosed in JP-A-533 is known. As described in the same publication, a sheet lamination molding apparatus used for performing the sheet lamination method includes a tray on which sheets are placed, a laser printer for applying an adhesive to a sheet supplied from the tray, From a reversing machine that reverses the sheet coated with the adhesive, a conveyor that transports the sheet from the laser printer unit to the table via the reversing machine, a heater plate that heat-bonds the adhesive, a cutting device that cuts the sheet into a predetermined shape, etc. It is configured.

[0003] A three-dimensional solid can be produced by any of the conventional three-dimensional modeling methods described above. However, although the apparatus used for implementing the lamination method proposed by Helisys of the United States is simple, there are problems in handling of the formed object, the price of the apparatus, the installation place, and the like. In addition, according to this method, a sheet to which an adhesive is applied in advance is used, and is temporarily adhered and laminated with a hot roll, and then cut with a carbon dioxide gas laser. Since the entire surface of the sheet is also adhered, it takes a great deal of time to remove unnecessary parts after the completion of modeling. In particular, there is a problem that a molded article having a complicated shape cannot be removed by a skilled person. Moreover,
Since a carbon dioxide laser is used for cutting,
The modeling device is expensive, and there is a problem of a smoke exhaust system for smoke generated by cutting.

On the other hand, the molding apparatus disclosed in Japanese Patent Application Laid-Open No. 7-195533 can use plain paper to which no adhesive is applied, but uses black toner for copying as the adhesive. As a result, the molded object becomes dark and unattractive, and color coloring is difficult. In addition, since the sheet is conveyed from the laser printer to the table by a conveyor, it also requires a reversing machine for reversing the sheet coated with adhesive, an air-conditioned box, etc. Are increasing in size and cost. Further, it is expected that the area of the heater plate for heat-sealing the adhesive becomes large, so that a large pressing force is required and power consumption is also increased.

Therefore, the present applicant has filed a Japanese Patent Application No. Hei 10-366.
According to No. 063, an adhesive application step of gluing an adhesive to a sheet electrostatically adsorbed on an endless belt driven endlessly, and a surface on which the adhesive is glued in the adhesive application step are laminated last time. It consists of a laminating step of laminating and adhering to the sheet that is being cut, and a cutting step of cutting the sheet laminated in this laminating step into a predetermined shape.The adhesive application step is on an infinite band, and the model part adopted is relatively Secretly,
The part to be discarded is glued relatively coarsely, and the cutting step is to cut the contour of the model part to be adopted on the laminated tray arranged below the infinite belt, A three-dimensional solid modeling method is proposed in which a cut is made and a part to be discarded is separated from the model part to obtain a three-dimensional solid having a predetermined shape.

[0006]

According to the above-mentioned invention proposed by the present applicant, a chargeable sheet can be produced in a relatively short time using plain paper which can be obtained at low cost regardless of quality and type. In addition to being able to obtain a three-dimensional solid, it is easy to control the positioning of the stacking tray, and it can easily respond to scale-up or scale-down of the modeling device. Furthermore, when using a metal cutter for cutting, Although many advantages such as a long life of the cutter can be obtained, the position of the sheet electrostatically adsorbed in an infinite band may be shifted or peeled off after the adhesive application step. If peeled off, it cannot be transported to the next laminating apparatus, and if the position shifts, a three-dimensional structure having a predetermined shape cannot be obtained. In addition, at the time of the adhesive application step in the invention proposed by the present applicant, there is an advantage that a general-purpose adhesive application apparatus such as an inkjet method or a raster method such as a valve jet can be applied. It is not always satisfactory from the viewpoint of gluing only to the target portion, the degree of spreading of the adhesive, and the uniform gluing of the adhesive.

Accordingly, the present invention provides a method for forming a three-dimensional object having a predetermined shape by sequentially stacking sheets, wherein the position of the electrostatically attracted sheet is not shifted by performing an adhesive application step, or Does not peel 3
Another object of the present invention is to provide a three-dimensional modeling apparatus suitable for use in carrying out a modeling method for forming a three-dimensional solid having a predetermined shape by sequentially stacking sheets. It is intended to be.

[0008]

The mechanism by which the sheet peels off or shifts from the endless band after the adhesive application step is not clear, but is considered to be due to the following reasons. That is, the surface of the sheet is charged with a positive charge having a potential of several hundred volts by the corona discharger, and is induced by the high potential positive charge of the sheet, and a negative charge is generated on the surface of the infinite band. The sheet is attracted to the surface of the infinite belt by the attraction between the charge and the negative charge. However, when moisture is absorbed by the sheet due to the gluing, it is considered that the electric resistance of the sheet is reduced and the electric charge on the sheet surface disappears. Then, the portion having no charge has a lower potential, the charge flows from the high potential portion of the surrounding non-glued portion, and has the same potential as the surroundings, the potential of the entire sheet is reduced, and the attraction force is also reduced. It is considered that when the pasting proceeds and the pasting area increases, the potential of the entire sheet decreases, and at the time of pasting a certain area, the electric charge completely disappears and the sheet is peeled off. Therefore, in order to solve the above-mentioned drawback, the present invention is configured such that when gluing, the gluing portion or the vicinity thereof is glued while being charged with static electricity.

That is, in order to solve the above-mentioned drawback, the invention according to claim 1 includes a step of sequentially applying a plurality of sheets including an adhesive application step of pasting an electrostatically adsorbed sheet. This is a shaping method for forming a three-dimensional solid body having a predetermined shape by laminating. When gluing is performed in the adhesive applying step, the adhesive applying step is performed while electrostatically charging a glued portion or the vicinity thereof. It is configured as follows. The invention according to claim 2 is
An adhesive application step of gluing the sheet electrostatically adsorbed to the endless belt driven endlessly, and laminating and bonding the surface to which the adhesive has been glued in the adhesive application step to the previously laminated sheet And a cutting step of cutting the sheets laminated in the laminating step into a predetermined shape, a method of forming a three-dimensional solid having a predetermined shape by sequentially laminating a plurality of sheets. In the adhesive applying step, the gluing portion or the vicinity thereof is electrostatically charged on the endless band while being electrostatically charged, and in the cutting step,
Cut the contour of the model part to be adopted on the stacking tray arranged below the infinite belt, make a predetermined cut in the part to be discarded, and separate the part to be discarded from the model part to form a predetermined shape. It is configured to obtain a three-dimensional solid. A first charger for electrostatically adsorbing a conductive infinite band arranged to be driven endlessly with being grounded, and a sheet supplied to the infinite band is provided. An adhesive coating device for gluing an adhesive to the adsorbed sheet, a second charger for electrostatically adsorbing the electrostatically adsorbed sheet again,
A lamination tray is provided below the infinite belt and is provided so as to be drivable in a direction in contact with the infinite belt and in a direction away from the infinite belt, and a sheet to which an adhesive is glued by the adhesive application device is sequentially laminated. A cutting device for cutting a sheet at an uppermost position, wherein the adhesive application device is disposed above the infinite belt so as to paste an adhesive on a sheet on the infinite belt in a predetermined pattern, and the cutting is performed. The apparatus is arranged below the endless belt so as to cut a model portion of the uppermost sheet stacked on the stacking tray and to make a predetermined cut in a portion to be discarded, and The charger is provided to move in association with the adhesive applicator. The invention according to claim 4 is used for carrying out a molding method for forming a three-dimensional solid body having a predetermined shape by sequentially laminating a plurality of sheets, including at least an adhesive application step of gluing the sheets. An adhesive application device comprising: an adhesive supply nozzle configured to supply the adhesive by pressurized air; and an air injection nozzle configured to eject compressed air. The opening of the air injection nozzle and the injection hole of the air injection nozzle are provided close to each other, and the invention according to claim 5 is configured such that the adhesive application device according to claim 3 supplies the adhesive by pressurized air. Adhesive supply nozzle,
An air injection nozzle from which compressed air is injected is provided, and an opening of the adhesive supply nozzle and an injection hole of the air injection nozzle are provided close to each other.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is equally applicable to a three-dimensional modeling method that includes a step of gluing a sheet that has been electrostatically attracted. However, in the following, an adhesive application step of gluing an adhesive to a sheet electrostatically adsorbed on a circulating belt driven endlessly, and a surface on which the adhesive is glued in the adhesive application step are laminated last time. It consists of a laminating step of laminating and adhering to the sheet that is being cut, and a cutting step of cutting the sheet laminated in this laminating step into a predetermined shape. The part to be discarded is applied relatively coarsely, and the cutting step is to cut the contour of the model part to be adopted on the lamination tray arranged below the circulating belt, and to apply a predetermined shape to the part to be discarded. A description will be given of a modeling apparatus used for implementing a method of obtaining a three-dimensional solid having a predetermined shape by making a cut and separating a part to be discarded from a model part. In addition, the adhesive applying apparatus according to the present invention, that is, the glue applying apparatus, can be equally applied to the three-dimensional three-dimensional molding method including the step of gluing the sheet, but is used for carrying out the manufacturing method for obtaining the three-dimensional solid. An example in which the apparatus is mounted on a molding apparatus will be described.

As shown in FIG. 1, the three-dimensional three-dimensional printing apparatus according to the present embodiment is generally composed of a conductive circulating belt 1. A gluing unit 71 of the gluing device 70 is provided above the circulating belt 1 at a predetermined interval. The gluing unit 71 has a slider box 21 on which an adhesive or the like to be described later is mounted and is slidably driven in the XX direction. It is composed of a gluing tool 72 driven in a direction in contact with the surface and a direction away from the surface, a pair of corona dischargers 22, 22 and the like driven integrally with the slider box 21. Although not shown in the drawing, a driving device for driving the slider box 21 and the gluing tool 72 is connected to a sequence control device, and is driven in the XX and YY directions as described above. Therefore, the gluing tool 72
Are driven in all directions with respect to the surface of the circulation belt 1 as shown by an arrow A in FIG.

The pair of corona dischargers 22, 22 are selected to have a length that can cover the sheet S on the circulating belt 1 in a direction crossing the sheet S. The distance between the pair of corona dischargers 22, 23 is adjustable by the pair of mounting members 23, 23. Attached to. The gluing tool 72 is disposed between the pair of corona dischargers 22,22. The gluing tool 72
In the present embodiment, an air blow type gluing tool described later with reference to FIG. 2 is applied. However, a conventionally well-known gluing tool, for example, a nozzle such as an injection needle for extruding glue at the tip of the glue tool, and a printer are provided. Raster type gluing tools such as ink jet and bubble jet can also be applied.

As shown in FIG. 2A, the sizing device 70 according to the present embodiment includes a sizing tool 72, an adhesive tank 80, a dispenser, that is, a coating pressure control device 90, and the like. ing. The gluing tool 72 includes an adhesive supply nozzle 74 and air injection nozzles 75, 75. The adhesive supply nozzle 74 and the air injection nozzles 75, 75 are combined in a holder 73, and as described above, It is attached to the slider box 21. The lower ends of the air injection nozzles 75, 75 are disposed on both sides of the adhesive supply nozzle 74 as shown in FIGS. It is mounted to extend slightly below 74 '. And the injection holes 76 of the air injection nozzles 75, 75,
Reference numerals 76 face downward and slightly toward each other. As a result, the adhesive supplied from the adhesive supply nozzle 74 by the pressurized air is sprayed and thinly and uniformly glued on the sheet S.

An air compressor 91 is connected to the application pressure control device 90. The pressure and flow rate of the air compressed by the air compressor 91 are controlled by a pressure control valve, a flow rate control valve, and the like provided in the application pressure control device 90, and the air injection nozzle 7
5, 75 and the adhesive tank 80 and the like. For this purpose, the air supply pipe 92, one of which is connected to the application pressure control device 90, branches off to form the flexible hose 9.
They are connected to the air injection nozzles 75, 75 via 2 ', 92', respectively. The adhesive tank 80 has a lid 81, and a pressurized air supply pipe 93, one of which is connected to the application pressure control device 90, is opened in the lid 81. Further, the lid 81 is provided with an adhesive supply pipe 82.
Is provided so as to reach near the bottom of the adhesive tank 80. The adhesive supply pipe 82 is also connected to an adhesive supply nozzle 74 through a flexible hose 82 ′. The viscosity of the adhesive is generally 300 to 1
Since it is 300 cps, 0.5 to
When air pressurized to about 1.0 kg / cm ² is supplied, the adhesive in the adhesive tank 80 is removed from the adhesive supply pipe 82.
To the adhesive supply nozzle 74.

According to the present embodiment, the lamination tray 30 is provided at a predetermined interval below the return side circulation belt portion 1b of the circulation belt 1 and at a position below the return side circulation belt portion 1b of the circulation belt 1. A cutting tool 40 is disposed between the stacking tray 30 and the stacking tray 30. Although not shown in the figures, the three-dimensional three-dimensional printing apparatus according to the present embodiment includes a three-dimensional data controller, that is, a 3D data controller, and a sequence controller, as is well known in the related art.

The conductive circulating belt 1 is a flexible endless belt formed by laminating a conductive metal such as aluminum or an alloy thereof, or a flexible belt obtained by mixing a conductive material such as carbon into rubber. It is configured as an endless belt. Then, it is looped between the driving pulley 3 and the driven pulley 2, and the upper side is the forward side circulating belt portion 1.
a, the lower side is the return side circulation belt portion 1b. When driving the circulating belt 1, the driving pulley 3 is preferably made of a material having a high frictional resistance or a timing gear so that there is no slip between the driving pulley 3 and the circulating belt 1. At least one is made of a conductive material and is grounded by a ground wire. Therefore, the circulating belt 1 is also indirectly grounded and has a zero potential. The electric motor that drives the driving pulley 3 is driven to rotate at a speed controlled by a control signal from a sequence control device. The pressure roller 4 is provided inside the return-side circulation belt portion 1b so as to reciprocate while rolling. The press roll 4 is also driven in the longitudinal direction by a control signal from the sequence control device, and presses the sheet S adsorbed below the return side circulating belt portion 1b toward the stacking tray 30.

In the embodiment shown in FIG. 1, the sheet feeder 50 is adapted to feed cut sheets S, S,..., And a tray 51 and a feeder disposed above the tray 51 are provided. It is composed of a paper roll 52, a registration roll 53 arranged near the drive pulley 3, and the like. Although the push-up device for driving the tray 51 upward is not shown in FIG. 1, sheets S, S,... Having a predetermined size are sequentially pushed up by the push-up device according to the used amount, and Are supplied one by one to the corona charger 60 or the circulating belt 1 by the paper feed roll 52, the registration roll 53, and the like driven at the speed controlled by the control signal. The registration roll 53
The sheet S is provided corresponding to the driving pulley 3, and the sheet S is supplied to the corona charger 60 by the circulation belt 1 and the registration roll 53.

The corona charger 60 has a box-shaped hood in which the direction of the circulation belt 1 is open. Although not shown in FIG. 1, a corona wire substantially equal to the length of the circulation belt 1 in the width direction is provided inside the hood. A positive high voltage is applied to the corona wire, and the hood is grounded. Therefore, when the sheet S, which is an insulator, is supplied to the inside of the corona charger 60 by the circulation belt 1 and the registration roll 53, the sheet S is positively charged and electrostatically attracts to the surface of the circulation belt 1 at zero potential. Will be done.

The cutting tool 40 has a cutter 41 at its tip. The cutting tool 40 also
Similarly to the gluing unit 20, a driving unit 42 is provided at the root thereof. The driving unit 42 is connected to the sequence control device by a signal line, and the cutter 41 uses a data signal output from the 3D data control device.
As shown by an arrow A 'in FIG. 1, the sheet is driven in a direction in which it comes into contact with the stacking tray 30 and in a direction in which it is separated, and is also driven in the width direction Y and the longitudinal direction X of the sheets S, S,. Is done. In the embodiment shown in FIG. 1, a coloring head 45 including a plurality of nozzles is provided for coloring the sheets S, S,. The coloring head 45 is also driven three-dimensionally by a data signal output from the 3D data control device, and can be colored in various colors along the line where the model portion is cut.

In the present embodiment, the stacking tray 30 is constituted by a movable table 31 having a predetermined area which is driven vertically. The drive unit, for example, the piston / cylinder unit is connected to the sequence controller by a signal line, not shown in the figure. The movable table 31 has a direction in which the movable table 31 contacts the surface of the return-side circulating belt portion 1b by a control signal sent from the sequence control device,
It is designed to be driven in the direction in which it is separated. At the time of contact, the sheets S electrostatically adsorbed on the surface of the return-side circulating belt portion 1b are adsorbed on the sheets S stacked on the movable table 31, and are sequentially stacked.

Next, a molding method using the three-dimensional three-dimensional molding apparatus will be described. First, a three-dimensional solid shape is designed by, for example, a three-dimensional CAD system. And 3D
In the data control device, the three-dimensional solid shape information is sequentially sliced in the horizontal direction into a thickness corresponding to the thickness of one of the sheets S, S,... To be laminated, and two-dimensional data of each sliced cross section is obtained. . Accordingly, the two-dimensional data corresponding to each sheet S, S,... From the sequence control device is transmitted to various driving units 4 such as the gluing tool 72 and the cutting tool 40.
2 to obtain a two-dimensional image in each sliced section.

A sheet S made of insulating paper, resin film or the like in a sheet feeder 50 is sent to a corona charger 60 by a paper feed roll 52, a registration roll 53, and the like driven based on a feed signal. Since the corona wire of the corona charger 60 is given a positive potential, the sheet S is positively charged. The sheet S is sent to the circulation belt 1,
The positively charged state and the electrostatically adsorbed state on the surface of the forward circulation belt portion 1a are shown in FIG.

The sheets S, S,... Have the same size and the same thickness, but the shape of the two-dimensional image or the model part differs depending on the sheet to be fed. Now, as shown in FIG. 1, the model portion M of the sheet S to be fed nth is substantially Y
It is assumed that the character is a part to be discarded outside the model part M. When the sheet S on the forward-side circulating belt portion 1a reaches a predetermined position, the circulating belt 1 is stopped, and the adhesive application step is started. (N) The two-dimensional data of the sheet is sent from the sequence control unit to the drive unit of the gluing tool 72, and the nozzle unit of the nozzle unit is based on the sent two-dimensional data as shown by an arrow A in FIG. , Is driven in a direction approaching the sheet S, and is appropriately driven in the XY directions.

On the other hand, the adhesive in the adhesive tank 80 is fed to the adhesive supply nozzle 74 by the controlled air pressure sent from the application pressure control device 90. At the same time, controlled air sent from the application pressure control device 90 is sent to the air injection nozzles 75. Thus, the adhesive is applied to the model portion M and the portion to be discarded. At this time, the adhesive is sprayed by the air jetted from the air jet nozzles 75, 75, and is thinly and uniformly glued onto the sheet S. In the pasting, the model portion M is applied to the entire surface or densely, and the portion to be discarded is applied to a required portion or coarsely. When gluing the adhesive, the sheet S is again positively charged by the pair of corona dischargers 22,22. As a result, the position of the sheet S on the circulating belt 1 is shifted since the sheet suction force does not weaken.
There is no peeling.

When the adhesive application step is completed, the drive pulley 3 is activated and the circulating belt 1 is driven until the sheet S on which the adhesive has been applied reaches a predetermined position on the stacking tray 30. When the movable table of the stacking tray 30 reaches the predetermined position, the movable table of the stacking tray 30 is driven upward to come into contact with the (n-1) th sheet S stacked in the previous round. The pressure roller 4 is driven, and the (n) th sheet S that has been attracted to the return-side circulating belt portion 1b is bonded to the (n-1) th sheet S. Next, a cutting step is performed. The sheets are stacked as described above, and by the end of the cutting step, the (n + 1) th sheet S is supplied from the sheet feeder 50 in parallel with the cutting step as described above. To the corona charger 60, and the adhesive application step is performed.

When the stacking is completed, the stacking tray 30 is driven downward. Drive unit 42 of cutting tool 40
Are driven by a data signal output from the 3D data control device in a direction in contact with the stacking tray 30 as shown by an arrow A ′ in FIG. 1, and the width of the stacked sheets S, S,. It is also driven in the controlled directions in the direction Y and the longitudinal direction X. Thereby, as shown in FIG. 2A, the laminated sheet S is cut along the line L by the cutter 41, and the model portion M is cut. At the same time, cuts K, K,... Reaching the cutting line L from the edge are also formed in the portion H to be discarded.
The state where the cutter 41 is cutting the laminated sheet S is shown in FIG. As shown in FIG. 2B, the cutter 41 cuts only the uppermost (n) th sheet S, and cuts the (n−1) th sheet S.
There is no such thing as cutting. In addition, this cutting process,
Since the cutting is performed on the previously laminated sheet, that is, the sheet S is not cut in an overhang state, the sheet S is reliably cut. Further, since the cutting is performed on the previously stacked sheets S, the cutter 41 does not hurt as compared with, for example, cutting on a metal plate on which the sheets are placed.

As described above, the step of cutting the (n) th sheet S is performed. However, since the step of applying the adhesive to the (n + 1) th sheet is also performed at the same time, these steps are slow. When the above process is completed, the driving pulley 3 is activated and the circulating belt 1 is driven until the (n + 1) th sheet S on which the adhesive is applied reaches a predetermined position of the stacking tray 30. Hereinafter, a predetermined number of sheets S, S,
... Lamination and cutting. Finally, the part to be discarded is cut off from the model parts M, M,... To obtain a predetermined three-dimensional structure.

When coloring in a three-dimensional solid, a necessary color is applied to the cutting line L from a coloring head 45 whose position is controlled similarly to the cutting tool 40. For example,
In order to obtain a three-dimensional three-dimensional structure having stripes of red and black, a predetermined number from the bottom is coated with red, and the next predetermined number is coated with black. Thereafter, a similar three-dimensional solid body having a predetermined width can be obtained by applying the composition in a similar manner.

The present invention can be implemented in various forms without being limited to the above embodiments. For example, one corona discharger 22, 22 can be implemented. Further, it can be implemented to move in conjunction with the gluing tool 72.
When implemented in this manner, in the embodiment shown in FIG. 1, the length is longer in the direction crossing the circulation belt 1, but can be shortened. In the embodiment shown in FIG. 2, two air injection nozzles 75, 75 are provided for one adhesive supply nozzle 74. A plurality of, for example, three or more nozzles can be provided around the nozzle 74. Further, the vertical position relationship between the opening 74 'at the lower end of the adhesive supply nozzle 74 and the injection holes 76, 76 of the air injection nozzles 75, 75 is adjusted to adjust the spray state of the adhesive. You can also.

In the above embodiment, the sheet S,
As S,..., Cut paper is supplied, but it is apparent that a three-dimensional solid can be obtained in the same manner from roll paper. In the embodiment shown in FIG. 1, the sheet S to which the adhesive is glued is
The press-contact roll 4 presses the sheet laminated previously, but a plate for receiving the rising load of the movable table 31 is provided inside the return side circulation belt portion 1b, and the sheet S is attracted to the movable table 31. It is also possible to carry out the pressing so as to press against the returning circulation belt portion 1b. Furthermore, the coloring head 45 can also be mounted on the driving unit 42 of the cutting tool 40 so that the nozzle part of the coloring head 45 moves following the cutter 41. It is apparent that the stacking tray 30 can also be provided so as to be movable in the XY directions.

[0031]

As described above, according to the present invention, at least the step of applying an adhesive for gluing the electrostatically attracted sheet is performed. In the molding method for forming a three-dimensional solid, when gluing in the adhesive applying step, the adhesive applying step or the vicinity thereof is electrostatically charged while the adhesive applying step is performed, so even if the adhesive applying step is performed. Alternatively, the sheet that is electrostatically adsorbed during the operation is not displaced or peeled off. Therefore, according to the present invention, it is possible to obtain an effect peculiar to the present invention that it can be accurately glued to a required shape and can be reliably sent to the next step, for example, a lamination step. Also, since the position of the sheet does not shift,
It is also possible to manufacture an accurate three-dimensional solid as designed.
According to another invention, an adhesive application step of gluing a sheet electrostatically adsorbed to an endless belt driven endlessly, and a surface on which the adhesive is glued in the adhesive application step are laminated last time. And a cutting step of cutting the sheets laminated in the laminating step into a predetermined shape. The three-dimensional object having a predetermined shape by sequentially laminating a plurality of sheets. In the adhesive applying step, in the adhesive application step, the glued portion or the vicinity thereof is electrostatically charged and glued on the infinite band, and in the cutting step, the glued portion is arranged below the infinite band. On the stacking tray, the contour of the model part to be used is cut, a predetermined cut is made in the part to be discarded, and the part to be discarded is separated from the model part to obtain a predetermined shape.
Since a three-dimensional solid is obtained, in addition to the above effects, the adhesive application step and the cutting step can be performed simultaneously without interference with each other, and the molding time can be greatly reduced. In addition, a carbon dioxide laser can be used in the cutting process. However, if a normal cutter is applied, a three-dimensional solid can be inexpensively used in a normal office environment without a smoke exhaust facility required when using the carbon dioxide laser. The effect that can be manufactured is also added. In addition, as long as the sheet is electrically charged, it can be manufactured using ordinary paper that can be obtained at low cost regardless of the quality and type. Furthermore, since the entire sheet is laminated, only the position of the sheet is controlled, and it is not necessary to control the model part having a different shape one by one as in the conventional case, and the control is simple. There is also an effect that there is. Also, in the cutting step, the laminated sheets are cut into a predetermined shape, so that when using a metal cutter, the life of the cutter is longer than when cutting on a metal base. There is no loss. Further, since a predetermined cut is made in the portion to be discarded, there is obtained an effect that the portion to be discarded after modeling can be easily separated from the model portion. Further, according to the present invention, since the endless belt is constituted by the endless belt driven endlessly, the scale can be relatively easily increased only by making the endless band longer. Further, the adhesive application device includes an adhesive supply nozzle configured to supply the adhesive by pressurized air, and an air injection nozzle configured to eject the compressed air. According to the invention in which the opening of the nozzle and the injection hole of the air injection nozzle are provided close to each other, the adhesive is sprayed, thinly and uniformly glued, so that the adhesive can be saved and at the same time laminated. The thickness of the sheet is also constant, and an effect of producing a high-quality three-dimensional solid as designed can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment of a three-dimensional three-dimensional printing apparatus according to the present invention.

FIGS. 2A and 2B are diagrams schematically showing an embodiment of a gluing apparatus according to the present invention, wherein FIG. 2A is a front view showing the whole, FIG. 2B is an enlarged front view of a nozzle portion, and FIG. )
It is an enlarged bottom view of a nozzle part.

[Explanation of symbols]

Reference Signs List 1 conductive circulating belt 22 (second) corona charger 30 stacking tray 40 cutting tool 60 (first) corona charger 70 sizing device 71 sizing unit 72 sizing tool 74 adhesive supply nozzle 75 air injection nozzle

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Hiroshi Fujimura 1-3, Takanodai, Yotsukaido-shi, Chiba F-term in Nihon Steel Works (reference) 4F211 AG03 TA03 TC04 TJ10 TN60 4F213 AG03 WA25 WA53 WA58 WA63 WA97 WB01 WL02 WL27 WL32 WL74 WL87 WL96

Claims (5)

[Claims] 1. A modeling method for forming a three-dimensional solid body having a predetermined shape by sequentially laminating a plurality of sheets, the method including at least an adhesive application step of gluing an electrostatically adsorbed sheet. A method for three-dimensionally forming a three-dimensional object, wherein, when gluing in the adhesive applying step, the adhesive applying step is performed while electrostatically charging the glued portion or the vicinity thereof. 2. An adhesive application step for gluing a sheet electrostatically adsorbed to an endless belt driven endlessly, and a surface on which the adhesive has been glued in the adhesive application step is previously laminated. A laminating step of laminating and bonding the sheets and a cutting step of cutting the sheets laminated in the laminating step into a predetermined shape are included. A plurality of sheets are sequentially laminated to form a three-dimensional solid having a predetermined shape. In the molding method, in the adhesive applying step, the glued portion or the vicinity thereof is electrostatically charged on the endless band while being electrostatically charged, and in the cutting step, a laminated tray disposed below the endless band Above, the contour of the model part to be adopted is cut, a predetermined cut is made in the part to be discarded, and the part to be discarded is separated from the model part to obtain a three-dimensional solid of a predetermined shape. 3-dimensional solid modeling how. 3. An electrostatic endless belt (1) arranged to be driven endlessly when grounded, and a sheet (S, S,...) Supplied to the endless band (1) are charged with static electricity. A first charger (60) for selectively adsorbing, and an adhesive application device (72) for gluing an adhesive to the adsorbed sheet (S)
And a second charger (22, 22) for electrostatically adsorbing again to the electrostatically adsorbed sheets (S, S,...).
And a sheet (S) provided below the infinite belt (1) so as to be drivable in a direction in contact with the infinite belt and in a direction away from the infinite belt, and to which an adhesive is glued by the adhesive coating device (72). A laminating tray (30) that is sequentially laminated, and a cutting device (40) for cutting the laminated uppermost sheet (S), wherein the adhesive application device (72) is provided with the infinite belt (1). Above the sheet (S) on the endless belt (1) so as to paste an adhesive in a predetermined pattern on the sheet (S).
0) cuts the model portion (M) of the uppermost sheet (S) stacked on the stacking tray (30) below the endless belt (1), and a predetermined portion for discarding. The second charger (22, 22) is arranged so as to make a cut, and the adhesive applying device (7
A three-dimensional modeling apparatus characterized by being provided so as to move in association with 2). 4. An adhesive applying apparatus used for carrying out a molding method for forming a three-dimensional solid body having a predetermined shape by sequentially laminating a plurality of sheets, including at least an adhesive applying step of gluing the sheets. (72) an adhesive supply nozzle (7) in which the adhesive is supplied by pressurized air;
4) and an air injection nozzle (75, 75) from which compressed air is injected, and an opening (74 ') of the adhesive supply nozzle (74) and the air injection nozzle (75, 75). 75) The three-dimensional modeling apparatus, wherein the injection holes (76, 76) are provided close to each other. 5. The adhesive application device (72) according to claim 3, wherein
Comprises an adhesive supply nozzle (74) in which the adhesive is supplied by pressurized air, and an air injection nozzle (75, 75) in which compressed air is injected. The opening (7) of the adhesive supply nozzle (74)
4 ') and an injection hole (76, 76) of the air injection nozzle (75, 75) provided in close proximity to the three-dimensional three-dimensional molding apparatus.