JP2943697B2 - Sheet additive manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet laminating apparatus and a sheet laminating object, and more particularly to a sheet laminating apparatus for laminating sheets to form a three-dimensional object.
The objective of the present invention is to improve the quality of the sheet laminate molded article such as accuracy and strength, and to provide a function of maintaining the quality of the sheet laminate molded article against equipment failure during the sheet laminate molding.

[0002]

2. Description of the Related Art Conventionally, a sheet stacking and forming apparatus for forming a three-dimensional object by stacking sheets is disclosed in, for example,
-195533.
Hereinafter, this conventional sheet additive manufacturing apparatus will be specifically described with reference to the drawings. FIG. 11 is a diagram showing a configuration of a conventional sheet additive manufacturing apparatus. In FIG. 11, reference numeral 101 denotes a sheet as a material for forming a three-dimensional object, and ordinary high-quality paper is used for the sheet 101. 102 is a data processing unit, and 103 is a control unit. A modeling unit 104 includes a table unit 105, a paper feed tray unit 106, a laser printer unit 107, and a transport unit 10.
8, intermediate tray section 109, heater plate section 110
And a cutting plotter section 111.

[0003] The table 105 is used to hold the sheet 10 being formed.
1. A table 113 for mounting the laminate according to No. 1, a motor (not shown) capable of moving the table 113 in the vertical direction, and a detection device (not shown) for detecting the absolute position (height) of the table 113 Be composed.
The paper feed tray unit 106 includes a tray 114 on which the sheets 101 are stacked and placed, and a motor (not shown) for vertically moving the tray 114. Reference numeral 115 denotes a fixing unit provided in the laser printer unit 107.

[0004] The transport section 108 includes a chain 117, a sprocket 118, a sheet holding mechanism 119, and a motor (not shown) for driving the sprocket 118. The chain 117, the sprocket 118, and the sheet holding mechanism 119 are provided on both sides of the sheet 101 to be conveyed in the width direction (perpendicular to the conveyance direction). The sheet holding mechanism 119 is provided so as to be able to hold the sheet 101 against the chains 117 on both sides. The intermediate tray unit 109 includes a tray 120a and a jogger 120.
b.

[0005] The heater plate 110 is provided with a table 1
A plate 123 fixed at a predetermined height directly above the sheet 05 and having a size sufficient to press the entire surface of the sheet laminate 122 on the lower surface side, and the plate 123 can be heated to a predetermined temperature. And a heater unit (not shown). The cutting plotter unit 111 includes the cutter 12
4 and an XY plotter 125 to which the cutter 124 is fixed and which moves horizontally based on data supplied by the data processing unit 102. The cutting plotter section 111 includes a heater plate section 110.
And at a predetermined height above the table unit 105, and at a position where there is no need to move the table 113 up and down or to feed paper onto the table 113.

Next, the molding operation of the conventional sheet laminating apparatus shown in FIG. 11 will be described. 12 and 13 show FIG.
2 is a flowchart showing a molding operation flow of the conventional sheet laminating apparatus shown in FIG. The data processing unit 102
The three-dimensional shape supplied and input from the three-dimensional CAD system is changed into two-dimensional shape information of a section sliced in the height direction, and the two-dimensional shape information is supplied to the laser printer unit 107 and the cutting plotter unit 111. Obtaining the two-dimensional shape information of the cross section based on the three-dimensional shape information is as follows.
It is well known in the field of CAD systems. The two-dimensional shape information data is created / supplied for each sheet 101 sent from the sheet feeding tray unit 106.

The control unit 103 includes a laser printer unit 107
And the cutting plotter unit 111 and the height position of the table 113 are controlled. When the power of the heater plate unit 110 is turned on (step S501) and the plate 123 reaches a predetermined temperature (step S502), the paper feed tray unit 106 sends out the new sheet 101 from the tray 114 to the laser printer unit 107. (Step S503).

The laser printer unit 107 prints a two-dimensional cross-sectional shape on the sheet 101 sent from the tray 114 based on the two-dimensional shape information supplied from the data processing unit 102 (step S504). The toner used for this printing is obtained by removing the pigment from the electronic toner, and contains a polyethylene-based thermoplastic resin as a main component. The sheet 101 on which the two-dimensional cross-sectional shape is printed is fixed to the fixing unit 115.
The print is fixed by the intermediate tray unit 109 and the transport unit 108.
And then transported (step S50).
5). The sheet 101 on which the printing has been fixed passes through the intermediate tray unit 109 and the transport unit 108 and is placed on the table 113 with the printing surface facing down (table 113 side) (step S506).

Next, the table 113 is moved upward by a driving mechanism (not shown), and presses the sheet 101 coated with toner on the plate 123 side against the plate 123 heated to a predetermined temperature (step S50).
7). Thus, the toner on the printing surface of the sheet 101 is
Once melted and the table 113 moves downward again and separates from the plate 123, it solidifies again and the sheet 101
Is adhered to the table 113 side along the cross-sectional shape.

Next, the table 113 is moved so that the uppermost surface of the sheet stack 122 of the sheets 101 is at the height of the cutting plotter 111 (step S50).
8), cutter 124 fixed to XY plotter 125
Is based on the data supplied from the data processing unit 102, based on one sheet 101 on the top surface of the sheet stack 122.
Is cut along the two-dimensional cross-sectional shape printed on the sheet 101 (step S509). In addition, the length of the blade of the cutter 124 is set to the uppermost sheet 10 of the sheet laminate 122.
It is adjusted so that only one of the sheets can be cut.

Next, if there is no abnormality in each part of the apparatus (step S510), the above operation is repeated until the maximum height of the three-dimensional object is reached (step S511).
The sheet laminate 122 is completed. The three-dimensional object reaches a predetermined maximum height (step S511), and the sheet stack 1
When 22 is completed, the table 113 moves upward again and presses the sheet stack 122 against the plate 123 (step S512).

Next, the power of the heater plate unit 110 that has heated the plate 123 to a predetermined temperature is turned off (step S513), and the sheet laminate 122
In a state where the sheet stack 122 is pressed against the plate 123 by the step 3, the sheet stack 122 is held under pressure until the temperature of the sheet stack 122 falls to room temperature. The operator takes out the sheet stack 122 from the shaping section 104 of the sheet stacking and shaping apparatus when the temperature of the sheet stack 122 reaches room temperature (step S514). As shown in FIGS. 11 and 14A, the completed sheet laminate 122 has an effective area 127 representing the shape of a three-dimensional object,
The unnecessary area 128 is not the shape of the three-dimensional object.

FIG. 14B is a diagram showing an enlarged structure of a portion A of the sheet laminate 122 of FIG. 14A. FIG.
In FIG. 4B, reference numeral 129 denotes the toner described above, and 13
Reference numeral 0 denotes a cutting line at which the sheet 101 is cut by the cutter 124. Reference numeral 131 denotes a toner similar to the toner 129. The toner 131 is printed in a grid pattern on the unnecessary area 128 so that the unnecessary area 128 does not disperse during modeling and does not disturb the molding operation. Is partially bonded.

The operator puts the sheet laminate 122 on the shaping section 1.
After removing the unnecessary area 128 from the sheet stack 122 (step S515), as shown in FIG. 15, the unnecessary area 128 is removed from the sheet stack 122 (step S515).
27, that is, a three-dimensional object shape is obtained (step S51).
6). After the sheet 101 is cut along the two-dimensional cross-sectional shape (step S509), if an abnormality such as running out of a sheet or running out of toner is recognized in each part of the apparatus during the molding process (step S510), the apparatus immediately starts the heater plate section. 1
The power supply of the power supply 10 is turned off (step S515), and the molding operation is stopped in that state. To perform the molding operation again, the operator performs the operation after restoring the abnormality of the apparatus.

[0015]

The conventional sheet additive manufacturing apparatus according to the above-described configuration / operation flow has the following problems. (A) The heating of the sheet laminate 122 is performed during the molding process.
This is always performed only on the uppermost layer, and inside the sheet laminate 122, the temperature is higher in the upper part and lower in the lower part, so that a remarkable temperature distribution occurs. In particular, in the lower part of the sheet laminate 122 near the table 113, the sheets 1 are bonded to each other in the early stage of the molding process. , A large repetitive load is applied, so that minute peeling occurs inside, and the strength is remarkably reduced. The reduced strength area causes the destruction of the effective area 127 at the time of removing the unnecessary area 128 from the sheet laminate 122 later, causing a significant reduction in the efficiency of the work of removing the unnecessary area 128 and deteriorating the shape accuracy of the three-dimensional modeled object. Let it.

(B) If an abnormality is found in each part of the apparatus during the molding process, the apparatus turns off the power of the heater plate section 110 and stops the molding operation in that state. Therefore, in such a case, the sheet laminate 12
The adhesive layer of the sheet laminate 122 is cooled / solidified without undergoing any correction while a remarkable temperature distribution is generated inside 2, and the sheet laminate 122 is deformed and the adhesive layer is peeled off. In addition, the positional relationship between the sheet stack 122 and the table 113 is shifted due to shrinkage during cooling / solidification. As described above, the temperature distribution is generated inside the sheet laminate 122 during the molding, and the upper temperature is always high and the lower temperature is low. In this state, if the molding operation is simply stopped and left as it is due to a device abnormality during molding, the portion of the toner with the higher temperature shrinks greatly when solidified, and the portion of the toner with the lower temperature Is hardly shrunk when hardened, and the way in which the toner shrinks inside the sheet laminate 122 differs. As described above, due to the toner shrinkage distribution inside the sheet laminate 122, the sheet laminate 122 is deformed and the adhesive layer is separated, and the positional relationship between the sheet laminate 122 and the table 113 is also shifted. When the shaping operation is continuously performed from the sheet stack 122 stopped in the middle, the pressure is applied in a deformed and solidified state, so that peeling eventually occurs inside the sheet stack 122, the strength of the lower layer portion is reduced, and the continuous shaping operation is performed. Shape deviation occurs at the starting height and shape accuracy is degraded.

(C) Since ordinary high quality paper is used for the sheet 101, even if the bonding surface has strength, the sheet 101
In particular, in forming a thin three-dimensional object having a thickness of 2 mm or less, the effective area 127 is likely to be destroyed when the unnecessary area 128 is removed from the sheet stack 122. For this reason, when the shape becomes fine, the effective area 1
If the unnecessary area 128 is removed so as not to cause the destruction of the area 27, removing the unnecessary area 128 significantly increases the working time. In addition, even when the unnecessary area 128 is taken out and care is taken with time so as not to destroy the effective area 127, the effective area 127 may be destroyed and cannot be manufactured.

Therefore, as a conventional technique for suppressing the destruction of the effective area when removing the unnecessary area from the sheet laminate, there is, for example, a sheet laminating apparatus reported in JP-A-6-190929. According to this conventional sheet laminating apparatus, since the molding is performed using the plastic film for the sheet laminate, the strength of the effective area can be improved, so that the destruction of the effective area is suppressed when the unnecessary area is removed. It has the advantage of being able to. However, in this conventional sheet additive manufacturing apparatus, not only the effective area but also the strength and rigidity of the unnecessary area are improved at the same time, so that it is extremely difficult to take out the effective area from the sheet laminate.

Therefore, according to the present invention, it is possible to obtain a molded article having high strength and accuracy, and to maintain the quality by suppressing a decrease in the quality of the molded article even if an apparatus failure occurs during the molding. An object of the present invention is to provide a sheet additive manufacturing apparatus and a sheet additive manufacturing article.

[0020]

According to a first aspect of the present invention, there is provided a data processing for converting a three-dimensional shape supplied from a three-dimensional CAD system into two-dimensional shape information of a section sliced in a height direction and supplying the information. Means, sheet feeding means for feeding sheets one by one, and sheet printing means for printing two-dimensional cross-sectional shape information on the sheet sent from the sheet feeding means based on the two-dimensional shape information supplied from the data processing means. Sheet transport means for aligning the printed surface of the printed sheet to the lower side and transporting the sheet, sheet mounting means for mounting the transported printed surface of the lower sheet, and sheet lamination by the printed sheet Driving means for moving the sheet placing means up and down in a state where the body is placed, and a sheet laminated body placed opposite to the sheet placing means and placed on the sheet placing means A first sheet heating means for heating,
A first sheet heating means is provided, a sheet pressing means for pressing the sheet stack, and a sheet stacking means disposed between the sheet placing means and the sheet pressing means, the sheet stack being placed on the sheet mounting means. A sheet cutting means for cutting the uppermost one sheet along the two-dimensional cross-sectional shape printed on the sheet, and a sheet mounting means moved upward by the driving means to thereby heat the first sheet heated to a predetermined temperature. The sheet stack was pressed against the sheet pressing means provided with the sheet heating means for a predetermined time, and the driving means moved the sheet placing means downward so that the uppermost surface of the sheet stack reached the predetermined position of the sheet cutting means. Then, when one sheet of the uppermost surface of the sheet laminate is cut along the two-dimensional cross-sectional shape printed on the sheet by the sheet cutting means, and the above operation is performed until the predetermined height of the three-dimensional object is reached. , 3 Three-dimensional object height determining means for determining whether the original object has reached a predetermined height, and when it is determined that the predetermined height of the three-dimensional object has been reached, driving means moves the sheet placing means upward. And pressing the sheet stack placed on the sheet placing means against the pressing means provided with the first sheet heating means, and stopping the first sheet heating means in the pressed state. A sheet stacking apparatus having means for stopping the sheet stacking means, wherein the sheet mounting means is provided with a second sheet heating means for heating the sheet stack placed on the sheet mounting means, and the first sheet heating means stopping means is provided. After stopping the first sheet heating means by the
A second sheet heating means stopping means for stopping the second sheet heating means after heating the sheet stack placed on the sheet placing means by the sheet heating means at a predetermined temperature for a predetermined time; It is characterized by the following.

According to a second aspect of the present invention, there is provided an apparatus abnormality judging means for judging whether or not each part of the apparatus is abnormal after the sheet is cut along the two-dimensional sectional shape printed on the sheet by the sheet cutting means. When it is determined that there is an abnormality in each part, the sheet placement means is moved upward by the driving means, and the sheet stacking means is provided on the sheet pressing means provided with the first sheet heating means heated to a predetermined temperature. Is pressed for a predetermined time, and thereafter, the first sheet heating means is stopped by the first sheet heating means stopping means.

According to a third aspect of the present invention, the sheet laminate is heated by the first and second sheet heating means at a temperature higher than the melting point of the toner.

According to a fourth aspect of the present invention, the third sheet heating means for heating the sheet at a lower temperature than the first and second sheet heating means provided in the sheet pressing means and the sheet placing means are provided. A fourth sheet heating means for heating the sheet at a lower temperature than the first and second sheet heating means, and at least one of the sheet pressing means and the sheet placing means when it is determined that there is an abnormality in each section of the apparatus. A pressing / placement abnormality determining means for determining whether or not there is an abnormality in one of the sheets; The stacking means is moved upward, the sheet stack is pressed against the sheet pressing means, and the first and second sheet heating means are stopped by the first and second sheet heating means stopping means. 4 seats Means for heating and holding the sheet stack, and in that state, an apparatus abnormality elimination determining means for determining whether or not the apparatus abnormality has been eliminated, and when it is determined that the apparatus abnormality has been eliminated, the third and fourth sheet heating means are stopped. Third to let
A fourth sheet heating unit stopping unit; and a first sheet heating unit activation unit for operating the first sheet heating unit when it is determined that the apparatus abnormality has been eliminated, and it is determined that the apparatus abnormality has been eliminated. In this case, the third and fourth sheet heating means are stopped, and the first sheet heating means is operated to heat the sheet laminate. It is characterized by judging whether or not the height has reached.

According to a fifth aspect of the present invention, when it is determined that the abnormality of the apparatus has not been eliminated, there is provided a set time determining means for determining whether a set time for operating the third and fourth sheet heating means is reached, When it is determined that the set time for operating the third and fourth sheet heating means has been reached, the third and fourth sheet heating means are stopped by the third and fourth sheet heating means stopping means. It is assumed that.

[0025] The invention of claim 6 is characterized in that the sheet is made of a fiber fusion paper in which wood pulp fibers are fused.

According to a seventh aspect of the present invention, the sheet has an acrylic resin applied to the surface.

[0027]

[0028]

[0029]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a view showing the configuration of a sheet laminating and shaping apparatus according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a sheet as a material for forming a three-dimensional object. Is used. 2 is a data processing unit, and 3 is a control unit. Reference numeral 4 denotes a modeling unit. The modeling unit 4 includes a table unit 5, a paper feed tray unit 6, a laser printer unit 7, a transport unit 8, an intermediate tray unit 9, a heater plate unit 10, and a cutting plotter unit. 11 is comprised.

The table unit 5 includes a table 13 for placing a laminate of the sheet 1 being formed, and a table 13.
A motor (not shown) that can move the table 13 in the vertical and vertical directions, a detecting device (not shown) for detecting the absolute position (height) of the table 13, a heater plate 14 provided on the table 13, It comprises a plate 16 provided on the upper surface and having a size sufficient to press the entire lower surface of the sheet laminate 15 and a heater unit 17 capable of heating the plate 16 to a predetermined temperature. The paper feed tray unit 6 is a tray 1 on which the sheets 1 are stacked and placed.
8 and a motor (not shown) for vertically moving the tray 18. 19 is the laser printer unit 7
Is a fixing unit provided in the printer.

The transport section 8 includes a chain 21, a sprocket 22, a sheet holding mechanism 23, and a motor (not shown) for driving the sprocket 22. Chain 21, sprocket 22, and seat holding mechanism 23
Is the width direction of the sheet 1 to be conveyed (perpendicular to the conveyance direction)
Are provided on both sides. The sheet holding mechanism 23 is provided so as to be able to hold the sheet 1 against the chains 21 on both sides. The intermediate tray section 9 has a tray 24a and a jogger 24b.

The heater plate section 10 is fixedly arranged at a predetermined height directly above the table section 5 and has a plate 26 of a size large enough to press the entire surface of the sheet laminate 15 on the lower surface side. And a heater unit (not shown) capable of heating the plate 26 to a predetermined temperature. The cutting plotter section 11 includes a cutter 27 and a cutter 27.
Is fixed, and moves horizontally based on the data supplied by the data processing unit 2.
It is composed of Cutting plotter section 11
Is located below the heater plate 10 and the table 5
Is placed at a predetermined height above
3 is arranged at a place where there is no need to insert the paper into the vertical movement or the table 13.

Next, the molding operation of the sheet lamination molding apparatus of the present embodiment shown in FIG. 1 will be described. FIGS. 2 and 3 are flowcharts showing the molding operation flow of the sheet laminating apparatus shown in FIG. Data processing unit 2 is a three-dimensional CAD
The 3D shape supplied and input from the system is changed into the 2D shape information of the cross-section sliced in the height direction.
The dimensional shape information is supplied to the laser printer unit 7 and the cutting plotter unit 11. Obtaining two-dimensional shape information of a cross section based on such three-dimensional shape information is well known in the field of CAD systems. The two-dimensional shape information data is created / supplied for each sheet 1 sent out from the sheet feeding tray unit 6.

The control unit 3 controls the sequence of the laser printer unit 7 and the cutting plotter unit 11 and controls the table 1
3 is performed. The power supply of the heater plate unit 10 is turned on in the paper feed tray unit 6 (step S1),
The plate 26 has a predetermined temperature, for example, 160 ° C. to 180 ° C.
When it is determined that the condition has been reached (step S2), a new sheet 1 is sent from the tray 18 to the laser printer unit 7 (step S3).

The laser printer unit 7 prints a two-dimensional cross-sectional shape on the sheet 1 sent from the tray 18 based on the two-dimensional shape information supplied from the data processing unit 2 (step S4). The toner used for this printing is obtained by removing the pigment from the electronic toner, and contains a polyethylene-based thermoplastic resin as a main component. The sheet 1 on which the two-dimensional cross-sectional shape has been printed is fixed in the fixing unit 19, and is conveyed after being aligned by the intermediate tray unit 9 and the conveying unit 8 (Step S5). The sheet 1 on which the printing has been fixed passes through the intermediate tray 9 and the transporting unit 8 and is placed on the table 13 with the printing surface positioned downward (toward the table 13) (step S6).

Next, the table 13 is moved upward by a driving mechanism (not shown), and is placed on the plate 26 which is heated at a predetermined temperature, for example, 160 ° C. to 180 ° C., which is higher than the melting point of the toner. The sheet 1 coated with the toner is pressed for a predetermined time, for example, about 15 minutes (step S7). As a result, the toner on the printing surface of the sheet 1 once melts, and when the table 13 moves downward again and separates from the plate 26, it solidifies again, and the sheet 1
Is adhered to the table 13 side along the cross-sectional shape.

The table 13 is moved downward so that the uppermost surface of the sheet stack 15 of the sheets 1 is at the height of the cutting plotter section 11 (step S8), and the cutter 27 fixed to the XY plotter 28 is moved. , Data processing unit 2
Is cut along the two-dimensional cross-sectional shape printed on the sheet 1 based on the data supplied from the sheet stack 15 (step S9). In addition,
The length of the blade of the cutter 27 is adjusted so that only one of the uppermost sheets 1 of the sheet laminate 15 can be cut.

Next, if there is no abnormality in each part of the apparatus (Step S10), the above operation is repeated until the maximum height of the three-dimensional object is reached (Step S11), whereby the sheet laminate 15 is completed. When the three-dimensional object reaches a predetermined maximum height (step S11) and the sheet stack 15 is completed, the table 13 moves upward again to press the sheet stack 15 against the plate 26 (step S1).
2). At this time, a pressure of about 200 kgf in A3 plate area is applied to the sheet laminate 15.

Next, the power of the heater plate unit 10 above the sheet laminate 15 that has heated the plate 26 to a predetermined temperature is turned off (step S13). Immediately thereafter, the power of the heater plate portion 14 below the sheet laminate 15 is turned on, and the plate 16 is heated to a temperature higher than the melting point of the toner, for example, 140 ° C. or higher (step S).
15). The upper limit of the heating temperature is preferably 180 ° C. or less in consideration of the temperature at which the sheet 1 does not carbonize. The heater plate section 14 is configured such that the plate 16 below the sheet laminate 15 is
Heat and hold at a temperature of 40 ° C. or higher for about 15 minutes (step S16).

After the heating and holding, the power of the heater plate portion 14 below the sheet laminate 15 is also turned off (step S17).
The sheet stack 15 is pressed and held until the temperature of the sheet stack 15 reaches room temperature while being pressed against the plate 26 on the table 13. The operator can use the sheet laminate 15
When the temperature has reached room temperature, the sheet laminate 15 is taken out of the modeling section 4 of the sheet laminating apparatus (step S1).
8). As shown in FIG. 1, the completed sheet laminate 15 has an effective area 29 representing the shape of a three-dimensional object,
The unnecessary area 30 is not the shape of the three-dimensional object.

After removing the sheet laminate 15 from the modeling section 4 (step S18), the operator removes the sheet laminate 15
By removing the unnecessary area 30 from the
9) An effective area 29, that is, a three-dimensional object shape is obtained (step S20). After the sheet 101 is cut along the two-dimensional cross-sectional shape (step S9), if any part of the apparatus such as a sheet break, a toner shortage, a paper jam, or the like is found during the shaping process (step S10), the apparatus immediately starts the operation. The power of the heater plate 110 is turned off (step S14), and the molding operation is stopped in that state. To perform the molding operation again, the operator performs the operation after restoring the abnormality of the apparatus.

As described above, in this embodiment, after the completed sheet laminate 15 is pressed against the plate 26 and the power of the heater plate 10 above the sheet laminate 15 is turned off, the lower side of the sheet laminate 15 is turned off. The heater unit 17
Is heated and held at a temperature equal to or higher than the melting point of the toner by the heater plate section 14 having the above-described configuration. Thereafter, the power of the heater plate section 14 below the sheet laminate 15 is turned off, and the sheet laminate 15 is cooled to room temperature. Since the sheet laminate 15 is configured to be taken out of the modeling section 4, the toner solidified in the final stage of the laminate molding, particularly the toner at the lower part of the sheet laminate 15, is heated and re-melted, and naturally cooled again under pressure to solidify. Can be done. Therefore, through a process of re-melting and solidifying the toner, the sheet laminate 1 is formed during the additive manufacturing.
(5) The toner portion can be repaired by reducing deformation and peeling occurring in the lower toner portion. Therefore, in particular, since the adhesive strength at the lower part of the sheet laminate 15 can be improved, the destruction of the effective area 29 at the time of removing the unnecessary area 30 from the sheet laminate 15 can be reduced, and the unnecessary area 30 can be removed. Work can be performed easily. In addition, it is possible to suppress the deterioration of the shape accuracy of the three-dimensional object.

Embodiment 2 Since the configuration of the sheet additive manufacturing apparatus of the present embodiment is the same as that of the first embodiment, it will be described with reference to FIG. Hereinafter, the shaping operation of the sheet stacking and shaping apparatus of the present embodiment will be described. FIGS. 4 and 5 are flowcharts showing a molding operation flow of the sheet lamination molding apparatus according to the second embodiment. Data processing unit 2 is a three-dimensional CAD
The 3D shape supplied and input from the system is changed into the 2D shape information of the cross-section sliced in the height direction.
The dimensional shape information is supplied to the laser printer unit 7 and the cutting plotter unit 11. Obtaining two-dimensional shape information of a cross section based on such three-dimensional shape information is well known in the field of CAD systems. The two-dimensional shape information data is created / supplied for each sheet 1 sent out from the sheet feeding tray unit 6.

The control unit 3 controls the sequence of the laser printer unit 7 and the cutting plotter unit 11 and controls the table 1
3 is performed. The power supply of the heater plate unit 10 is turned on in the paper feed tray unit 6 (step S3).
1) The plate 26 is at a predetermined temperature, for example, 160 ° C. to 1
When it is determined that the number has reached 80 (step S32), a new sheet 1 is sent from the tray 18 to the laser printer unit 7 (step S33).

The laser printer unit 7 prints a two-dimensional sectional shape on the sheet 1 sent from the tray 18 based on the two-dimensional shape information supplied from the data processing unit 2 (step S34). The toner used for this printing is obtained by removing the pigment from the electronic toner, and contains a polyethylene-based thermoplastic resin as a main component. The sheet 1 on which the two-dimensional cross-sectional shape is printed is fixed by the fixing unit 19, and is conveyed after being aligned by the intermediate tray unit 9 and the conveying unit 8 (Step S35). The sheet 1 on which the print is fixed is
After passing through the intermediate tray section 9 and the transport section 8, the printing surface is positioned on the lower side (table 13 side) and is placed on the table 13 (step S36).

Next, the table 13 is moved upward by a driving mechanism (not shown), and is placed on the plate 26 heated at a predetermined temperature, for example, 160 ° C. to 180 ° C., which is higher than the melting point of the toner. The sheet 1 coated with the toner is pressed for a predetermined time, for example, about 15 minutes (step S37). As a result, the toner on the printing surface of the sheet 1 once melts, and when the table 13 moves downward again and separates from the plate 26, it solidifies again, and the sheet 1 adheres to the table 13 along the cross-sectional shape. Is done.

The table 13 is moved downward so that the uppermost surface of the sheet stack 15 of the sheets 1 is at the height of the cutting plotter section 11 (step S38), and XY.
The cutter 27 fixed to the plotter 28 moves the sheet stack 15 based on the data supplied from the data processing unit 2.
Sheet 1 on the top surface of
Cutting is performed along the two-dimensional cross-sectional shape (step S39). The length of the blade of the cutter 27 is adjusted so that only one of the uppermost sheets 1 of the sheet laminate 15 can be cut.

Next, if there is no abnormality in each part of the apparatus (Step S40), the above operation is repeated until the maximum height of the three-dimensional object is reached (Step S41), whereby the sheet laminate 15 is completed. When the three-dimensional object reaches the predetermined maximum height (Step S41) and the sheet stack 15 is completed, the table 13 moves upward again to press the sheet stack 15 against the plate 26 (Step S4).
2). At this time, a pressure of about 200 kgf in A3 plate area is applied to the sheet laminate 15.

Next, the power of the heater plate unit 10 above the sheet laminate 15 that has heated the plate 26 to a predetermined temperature is turned off (step S43). Immediately thereafter, the power of the heater plate section 14 below the sheet stack 15 is turned on, and the plate 16 is heated to a temperature higher than the melting point of the toner, for example, 140 ° C. or higher (step S).
46). The upper limit of the heating temperature is preferably 180 ° C. or less in consideration of the temperature at which the sheet is not carbonized. The heater plate section 14 is provided with a plate 16 below the sheet laminate 15.
Heat and hold at a temperature of 0 ° C. or more for about 15 minutes (Step S
47).

After the heating and holding, the power of the heater plate portion 14 below the sheet laminate 15 is also turned off (step S48),
The sheet stack 15 is pressed and held until the temperature of the sheet stack 15 reaches room temperature while being pressed against the plate 26 on the table 13. The operator can use the sheet laminate 15
When the temperature has reached room temperature, the sheet laminate 15 is taken out of the modeling section 4 of the sheet laminating apparatus (step S4).
9). As shown in FIG. 1, the completed sheet laminate 15 has an effective area 29 representing the shape of a three-dimensional object,
The unnecessary area 30 is not the shape of the three-dimensional object.

After removing the sheet laminate 15 from the modeling section 4 (step S49), the operator removes the sheet laminate 15
By removing the unnecessary area 30 from the
0), an effective area 29, that is, a three-dimensional object shape is obtained (step S51). After the sheet 101 is cut along the two-dimensional cross-sectional shape (step S39), if an abnormality such as an out-of-sheet, out-of-toner, or paper jam is detected in each part of the apparatus (step S40), the table 13 Immediately move upward to a predetermined temperature, e.g.
The sheet laminate 15 is placed on the plate 26 heated to 0 ° C.
Is pressed for a predetermined time, for example, about 15 minutes (step S
44). In this state, the apparatus turns off the power of the heater plate unit 10 (step S45) and stops the modeling operation.
To perform the molding operation again, the operator performs the operation after restoring the abnormality of the apparatus.

As described above, in this embodiment, after the completed sheet laminate 15 is pressed against the plate 26 and the power supply to the heater plate portion 10 above the sheet laminate 15 is turned off, the lower side of the sheet laminate 15 is The heater unit 17
Is heated and held at a temperature equal to or higher than the melting point of the toner by the heater plate section 14 having the above-described configuration. Thereafter, the power of the heater plate section 14 below the sheet laminate 15 is turned off, and the sheet laminate 15 is cooled to room temperature. Since it is configured to be taken out from the modeling section 4, it is possible to heat and re-melt the toner solidified particularly in the lower part of the sheet laminate 15 in the final stage of the lamination molding, and to naturally cool it again under pressure to solidify. For this reason, through the steps of re-melting and solidifying the toner, deformation and peeling generated in the toner portion below the sheet laminate 15 during the lamination molding can be reduced, and the toner portion can be repaired. Therefore, in particular, the adhesive strength at the lower part of the sheet laminate 15 can be improved.
The destruction of the effective area 29 at the time of removing the unnecessary area 30 from the work can be reduced, and the work of removing the unnecessary area 30 can be easily performed. In addition, it is possible to suppress the deterioration of the shape accuracy of the three-dimensional object.

Conventionally, after the sheet 1 is cut along the two-dimensional cross-sectional shape, if there is an abnormality in each part of the apparatus, the power of the heater plate part 10 is immediately turned off, molding is temporarily stopped, and the apparatus is restored. It was configured to perform modeling again. For this reason, the flatness of the uppermost surface of the upper part of the sheet laminate 15 is poor due to the variation in the temperature distribution inside the sheet laminate 15, and the molding is performed again in this state. Deterioration of shape accuracy becomes remarkable.

On the other hand, in the present embodiment, after the sheet 1 is cut along the two-dimensional cross-sectional shape printed on the sheet 1 by the cutting plotter section 11, the table section 5 determines that there is an abnormality in each section of the apparatus. When the determination is made, the table 13 is moved upward, the sheet laminate 15 is pressed against the heater plate section 10 being heated to a predetermined temperature for a predetermined time, and then the power supply of the heater plate section 10 is stopped. Therefore, by applying pressure and heating to the sheet laminate 15, the flatness of the uppermost surface of the upper portion of the sheet laminate 15 can be improved. For this reason,
Even if molding is performed again, deformation and peeling are unlikely to occur.
Deterioration of the shape accuracy of the three-dimensional molded object can be suppressed.

Embodiment 3 FIG. 6 is a diagram showing a configuration of a sheet additive manufacturing apparatus according to Embodiment 3 of the present invention. In FIG. 6, the same reference numerals as those in FIG.
5, a heater unit 32 for heating the sheet stack 15 at a lower temperature, for example, 100 to 130 ° C., than the heater units 17 and 31 provided in the heater plate unit 10, and 33 a heater plate. The heater unit heats the sheet stack 15 at a lower temperature than the heater units 17 and 31 provided in the unit 14. Reference numeral 34 denotes a heater unit 1 based on a signal from the control unit 3.
Reference numeral 35 denotes a relay for switching between 6 and 33.
This is a relay for switching between the heater units 31 and 32 in response to a signal from the controller. The heater units 28 and 30 can heat the plate 18 and the second plate 26 to a temperature equal to or lower than the melting point of the toner 22 (80 to 100 ° C.).

Next, the molding operation of the sheet laminating apparatus of this embodiment shown in FIG. 6 will be described. FIGS. 7 and 8 are flowcharts showing the molding operation flow of the sheet laminating apparatus shown in FIG. Data processing unit 2 is a three-dimensional CAD
The 3D shape supplied and input from the system is changed into the 2D shape information of the cross-section sliced in the height direction.
The dimensional shape information is supplied to the laser printer unit 7 and the cutting plotter unit 11. Obtaining two-dimensional shape information of a cross section based on such three-dimensional shape information is well known in the field of CAD systems. The two-dimensional shape information data is created / supplied for each sheet 1 sent out from the sheet feeding tray unit 6.

The control unit 3 controls the sequence of the laser printer unit 7 and the cutting plotter unit 11 and the table 1
3 is performed. The power supply of the heater plate unit 10 is turned on in the paper feed tray unit 6 (step S6).
1) The plate 26 is at a predetermined temperature, for example, 160 ° C. to 1
When it is determined that the temperature has reached 80 ° C. (step S62), a new sheet 1 is sent from the tray 18 to the laser printer unit 7 (step S63).

The laser printer unit 7 prints a two-dimensional sectional shape on the sheet 1 sent from the tray 18 based on the two-dimensional shape information supplied from the data processing unit 2 (step S64). The toner used for this printing is obtained by removing the pigment from the electronic toner, and contains a polyethylene-based thermoplastic resin as a main component. The sheet 1 on which the two-dimensional cross-sectional shape is printed is fixed in the fixing unit 19, and is conveyed after being aligned by the intermediate tray unit 9 and the conveying unit 8 (Step S65). The sheet 1 on which the print is fixed is
After passing through the intermediate tray section 9 and the transport section 8, the print surface is positioned on the lower side (table 13 side) and is placed on the table 13 (step S66).

Next, the table 13 is moved upward by a driving mechanism (not shown), and is placed on the plate 26 which is heated at a predetermined temperature, for example, 160 ° C. to 180 ° C., which is higher than the melting point of the toner. The sheet 1 coated with the toner is pressed for a predetermined time, for example, about 15 minutes (step S67). As a result, the toner on the printing surface of the sheet 1 once melts, and when the table 13 moves downward again and separates from the plate 26, it solidifies again, and the sheet 1 adheres to the table 13 along the cross-sectional shape. Is done.

The table 13 is moved downward so that the uppermost surface of the sheet stack 15 of the sheets 1 is at the height of the cutting plotter section 11 (step S68), and X-Y.
The cutter 27 fixed to the plotter 28 moves the sheet stack 15 based on the data supplied from the data processing unit 2.
Sheet 1 on the top surface of
Cutting is performed along the two-dimensional cross-sectional shape (step S69). The length of the blade of the cutter 27 is adjusted so that only one of the uppermost sheets 1 of the sheet laminate 15 can be cut.

Next, if there is no abnormality in each part of the apparatus (Step S70), the above operation is repeated until the maximum height of the three-dimensional object is reached (Step S71), whereby the sheet laminate 15 is completed. When the three-dimensional object reaches the predetermined maximum height (step S71) and the sheet stack 15 is completed, the table 13 moves upward again to press the sheet stack 15 against the plate 26 (step S7).
2). At this time, a pressure of about 200 kgf in A3 plate area is applied to the sheet laminate 15.

Next, the power of the heater unit 31 of the heater plate section 10 above the sheet laminate 15 that has heated the plate 26 to a predetermined temperature is turned off (step S7).
3). Immediately thereafter, the power of the heater unit 17 of the heater plate portion 14 below the sheet stack 15 is turned on, and the plate 16 is heated to a temperature equal to or higher than the melting point of the toner, for example, 140 ° C.
The heating is performed so as to reach the above temperature (step S79).
The upper limit of the heating temperature is preferably 180 ° C. or less in consideration of the temperature at which the sheet 1 does not carbonize. Heater plate section 14
Heats and holds the plate 16 below the sheet laminate 15 at a temperature of 140 ° C. or higher for about 15 minutes (Step S8)
0).

After the heating and holding, the power of the heater plate section 14 below the sheet laminate 15 is also turned off, and the power of all the heater units is turned off (step S81).
Is pressed against the plate 26 on the table 13 and is held under pressure until the temperature of the sheet laminate 15 reaches room temperature. The operator takes out the sheet stack 15 from the modeling section 4 of the sheet stacking apparatus when the temperature of the sheet stack 15 reaches room temperature (step S82). As shown in FIG. 6, the completed sheet laminate 15 includes an effective area 29 representing the shape of the three-dimensional object and an unnecessary area 30 not having the shape of the three-dimensional object.

After removing the sheet laminate 15 from the modeling section 4 (step S82), the operator removes the sheet laminate 15
By removing the unnecessary area 30 from the
3) An effective area 29, that is, a three-dimensional object shape is obtained (step S84). After the sheet 1 is cut along the two-dimensional cross-sectional shape (step S69), if an abnormality such as a sheet break, a toner shortage, a paper jam, or the like is detected during the shaping process (step S70), the apparatus sets the plate 1 It is determined whether there is no abnormality in at least one of the plate 16 and the plate 26, and when it is determined that there is no abnormality (step S7).
4) The table 13 is moved upward to
Then, the sheet laminate 15 is pressed (step S75).

The apparatus is arranged such that the sheet laminate 15 is
Is pressed, the power supply of the heater unit 31 is turned off, and the power supplies of the heater units 32 and 33 are turned on (step S76).
5 is heated and held at a low temperature of about 100 to 130 ° C. (step S77). If the apparatus determines that the apparatus abnormality has been resolved (step S77), the heater units 32 and 33
Is turned off, the power of the heater unit 31 is turned on (step S78), and the sheet laminate 15 is heated at about 140 to 180 ° C. by the heater unit 31, and the process returns to step 71. When there is an abnormality in the plates 16 and 26 (step S74), the apparatus turns off the power of all the heater units (step S81).

As described above, in the present embodiment, after the power of the heater plate unit 10 above the sheet laminate 15 is turned off while the completed sheet laminate 15 is pressed against the plate 26, The heater unit 17
Is heated and held at a temperature equal to or higher than the melting point of the toner by the heater plate section 14 having the above-described configuration. Thereafter, the power of the heater plate section 14 below the sheet laminate 15 is turned off, and the sheet laminate 15 is cooled to room temperature. Since the sheet laminate 15 is configured to be taken out of the modeling section 4, the toner solidified in the final stage of the laminate molding, particularly the toner at the lower part of the sheet laminate 15, is heated and re-melted, and naturally cooled again under pressure to solidify. Can be done. Therefore, through a process of re-melting and solidifying the toner, the sheet laminate 1 is formed during the additive manufacturing.
(5) The toner portion can be repaired by reducing deformation and peeling occurring in the lower toner portion. Therefore, in particular, since the adhesive strength at the lower part of the sheet laminate 15 can be improved, the destruction of the effective area 29 at the time of removing the unnecessary area 30 from the sheet laminate 15 can be reduced, and the unnecessary area 30 can be removed. Work can be performed easily. In addition, it is possible to suppress the deterioration of the shape accuracy of the three-dimensional object.

In this embodiment, even if there is an abnormality in the apparatus, if there is no abnormality in the plates 16 and 26, the heater unit 32 and the sheet stack 15 are pressed against the plate 26 until the abnormality in the apparatus is eliminated. 33 and the sheet laminate 15
Embodiment 2 is configured to be held at a low temperature by heating.
As compared with the case where the sheet laminate 15 of FIG.
Thermal deterioration of the sheet 1 can be suppressed. In addition, since the sheet laminate 15 is pressurized and heated as in the second embodiment, the flatness of the uppermost surface of the sheet laminate 15 can be improved. For this reason, even if the molding is performed again or the deformation and the peeling are performed, the deformation and the peeling hardly occur, and the deterioration of the shape accuracy of the three-dimensional molded object can be suppressed.

Embodiment 4 The configuration of the sheet additive manufacturing apparatus of the present embodiment is the same as that of the first embodiment, and will be described with reference to FIG. Hereinafter, the shaping operation of the sheet stacking and shaping apparatus of the present embodiment will be described. FIGS. 9 and 10 are flowcharts showing the molding operation flow of the sheet lamination molding apparatus according to the fourth embodiment. The data processing unit 2 has a three-dimensional CA
The three-dimensional shape supplied and input from the D system is changed into two-dimensional shape information of a section sliced in the height direction, and the two-dimensional shape information is supplied to the laser printer unit 7 and the cutting plotter unit 11. Obtaining two-dimensional shape information of a cross section based on such three-dimensional shape information is well known in the field of CAD systems. The two-dimensional shape information data is
Created for each sheet 1 sent out from the paper feed tray 6 /
Supplied.

The control unit 3 controls the sequence of the laser printer unit 7 and the cutting plotter unit 11 and the table 1
3 is performed. When the power supply of the heater unit 31 of the heater plate unit 10 is turned on (step S91) and the sheet tray unit 6 determines that the plate 26 has reached a predetermined temperature, for example, 160 ° C. to 180 ° C. (step S92), the sheet feeding unit 6 sets a new sheet. 1 is sent from the tray 18 to the laser printer unit 7 (step S93).

The laser printer unit 7 prints a two-dimensional sectional shape on the sheet 1 sent from the tray 18 based on the two-dimensional shape information supplied from the data processing unit 2 (step S94). The toner used for this printing is obtained by removing the pigment from the electronic toner, and contains a polyethylene-based thermoplastic resin as a main component. The sheet 1 on which the two-dimensional cross-sectional shape is printed is fixed by the fixing unit 19, and is conveyed after being aligned by the intermediate tray unit 9 and the conveying unit 8 (step S95). The sheet 1 on which the print is fixed is
After passing through the intermediate tray section 9 and the transport section 8, the printing surface is positioned on the lower side (table 13 side) and placed on the table 13 (step S96).

Next, the table 13 is moved upward by a drive mechanism (not shown), and is placed on the plate 26 which is heated at a predetermined temperature, for example, 160 ° C. to 180 ° C. which is higher than the melting point of the toner. The sheet 1 coated with the toner is pressed for a predetermined time, for example, about 15 minutes (step S97). As a result, the toner on the printing surface of the sheet 1 once melts, and when the table 13 moves downward again and separates from the plate 26, it solidifies again, and the sheet 1 adheres to the table 13 along the cross-sectional shape. Is done.

The table 13 is moved downward so that the uppermost surface of the sheet stack 15 of the sheets 1 is at the height of the cutting plotter section 11 (step S98), and XY is performed.
The cutter 27 fixed to the plotter 28 moves the sheet stack 15 based on the data supplied from the data processing unit 2.
Sheet 1 on the top surface of
Cutting is performed along the two-dimensional cross-sectional shape (step S99). The length of the blade of the cutter 27 is adjusted so that only one of the uppermost sheets 1 of the sheet laminate 15 can be cut.

Next, if there is no abnormality in each part of the apparatus (step S100), the above operation is repeated until the maximum height of the three-dimensional object is reached (step S101).
The sheet laminate 15 is completed. The three-dimensional object reaches a predetermined maximum height (step S101), and the sheet stack 15
Is completed, the table 13 moves upward again to press the sheet stack 15 against the plate 26 (step S102). At this time, a pressure of about 200 kgf in A3 plate area is applied to the sheet laminate 15.

Next, the power supply of the heater unit 31 of the heater plate section 10 above the sheet laminate 15 that has heated the plate 26 to a predetermined temperature is turned off (step S10).
3). Immediately thereafter, the power of the heater unit 17 of the heater plate portion 14 below the sheet stack 15 is turned on, and the plate 16 is heated to a temperature equal to or higher than the melting point of the toner, for example, 140 ° C.
Heat to reach the above temperature (Step S11
0). The upper limit of the heating temperature is preferably 180 ° C. or less in consideration of the temperature at which the sheet 1 does not carbonize. The heater plate section 14 is provided with a plate 16 below the sheet laminate 15.
Heat and hold at a temperature of 0 ° C. or more for about 15 minutes (Step S
111).

After the heating and holding, the power of the heater plate 14 below the sheet laminate 15 is also turned off, and the power of all the heater units is turned off (step S112).
5 is pressed and held until the temperature of the sheet laminate 15 reaches room temperature while being pressed against the plate 26 on the table 13. The operator takes out the sheet stack 15 from the modeling section 4 of the sheet stacking apparatus when the temperature of the sheet stack 15 reaches room temperature (step S113). As shown in FIG. 6, the completed sheet laminate 15 includes an effective area 29 representing the shape of the three-dimensional object and an unnecessary area 30 not having the shape of the three-dimensional object.

After removing the sheet laminate 15 from the modeling section 4 (step S113), the operator moves the sheet laminate 1
5 by removing the unnecessary area 30 (step S5).
114), an effective area 29, that is, a three-dimensional object shape is obtained (step S115). After the sheet 1 is cut along the two-dimensional cross-sectional shape (step S99), if an abnormality is found in each part of the apparatus such as a sheet break, a toner shortage, a paper jam, etc. during the shaping process (step S100), the apparatus sets the plate 1 It is determined whether there is any abnormality in the plates 16 and 26, and if it is determined that there is no abnormality (step S104), the table 13 is moved upward and the sheet laminate 15 is pressed against the plate 26 (step S105).

The apparatus is arranged such that the sheet laminate 15 is placed on the plate 26.
Is pressed, the power of the heater unit 31 is turned off, the power of the heater units 32 and 33 is turned on (step S106), and the sheet stack 15 is kept at a low temperature of about 100 to 130 ° C. until the apparatus abnormality is eliminated. Heating and holding (step S107). If the apparatus determines that the apparatus abnormality has been resolved (step S107), the heater unit 3
2 and 33 as well as the heater unit 3
1 is turned on (step S108), the sheet stack 15 is heated at about 140 to 180 ° C. by the heater unit 31, and the process returns to step 71. The apparatus comprises a sheet laminate 15
When the heater units 32 and 33 are being heated by the heater units 32 and 33, it is determined that the set time for operating the heater units 32 and 33 has been reached (step S109), even if the apparatus abnormality is not resolved (step S109). The power supply of all the heater units is turned off (step S11).
2).

As described above, in the present embodiment, after the power of the heater plate portion 10 above the sheet laminate 15 is turned off in a state where the completed sheet laminate 15 is pressed against the plate 26, the lower side of the sheet laminate 15 is The heater unit 17
Is heated and held at a temperature equal to or higher than the melting point of the toner by the heater plate section 14 having the above-described configuration. Thereafter, the power of the heater plate section 14 below the sheet laminate 15 is turned off, and the sheet laminate 15 is cooled to room temperature. Since the sheet laminate 15 is configured to be taken out of the modeling section 4, the toner solidified in the final stage of the laminate molding, particularly the toner at the lower part of the sheet laminate 15, is heated and re-melted, and naturally cooled again under pressure to solidify. Can be done. Therefore, through a process of re-melting and solidifying the toner, the sheet laminate 1 is formed during the additive manufacturing.
(5) The toner portion can be repaired by reducing deformation and peeling occurring in the lower toner portion. Therefore, in particular, since the adhesive strength at the lower part of the sheet laminate 15 can be improved, the destruction of the effective area 29 at the time of removing the unnecessary area 30 from the sheet laminate 15 can be reduced, and the unnecessary area 30 can be removed. Work can be performed easily. In addition, it is possible to suppress the deterioration of the shape accuracy of the three-dimensional object.

In this embodiment, if there is no abnormality in the plates 16 and 26 even if there is an abnormality in the apparatus, the heater unit 3 is pressed with the sheet laminate 15 pressed against the plate 26.
At time 2 and 33, the sheet stack 15 is heated and held at a low temperature. When the sheet stack 15 is held at a low temperature, the set time for operating the heater units 32 and 33 has been reached even if the apparatus abnormality is not eliminated. In the case, the heater units 32 and 3
Since the power supply of the heater unit is turned off including 3, the time for heating the sheet laminate 15 can be set by a timer. For this reason, it is possible to prevent a risk that the sheet 1 is erroneously heated for a long time and the sheet 1 is deteriorated by heating. In addition, as in the third embodiment, since the sheet laminate 15 is pressurized and heated, the flatness of the uppermost surface of the sheet laminate 15 can be improved. For this reason, even if modeling is performed again,
Even when deformed and peeled, deformation and peeling hardly occur,
Deterioration of the shape accuracy of the three-dimensional object can be suppressed.

In the first to fourth embodiments, the case where the high-quality paper is used as the material of the sheet 1 has been described. However, the present invention is not limited to this. You may comprise using the fiber fusion paper which fused the wood pulp fiber. In this case, since the sheet has flexibility and is strong as paper, the effective area 29 of the sheet stack 15 can be made harder to break when the unnecessary area 30 is peeled from the sheet stack 15 than in the case of conventional high quality paper. it can. Therefore, the stripping operation of the unnecessary area 30 can be performed more efficiently and in a shorter time than before. Further, the fiber-fused paper is dust-free because the fibers are fused together. Therefore, it is possible to reduce the amount of the cutting waste adhering to the cutter 27 and suppress the deterioration of the rotation of the cutter 27 due to the adhesion of the cutting waste.

In the first to fourth embodiments,
A fiber-fused paper coated with an acrylic resin on the surface may be used, and it is more flexible while having a suitable hardness than a fiber-fused paper without an acrylic resin applied on the surface. Therefore, shape deterioration can be suppressed efficiently.

The fiber fusion paper and the fiber fusion paper coated with an acrylic resin on the surface are not applied only to the sheet laminating method of the first to fourth embodiments. You may apply to a sheet additive manufacturing method. In this case, compared to the conventional case of simply using high quality paper, the sheet 1
Since the internal destruction can be made hard to occur, the destruction of the effective area 29 can be made hard to occur when the unnecessary area 30 is peeled off. Therefore, the unnecessary area 30 is smaller than in the related art.
Can be efficiently performed in a shorter time.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a sheet lamination molding apparatus according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a molding operation flow of the sheet lamination molding apparatus shown in FIG.

FIG. 3 is a flowchart illustrating a molding operation flow of the sheet stacking and molding apparatus illustrated in FIG. 1;

FIG. 4 is a flowchart illustrating a molding operation flow of the sheet lamination molding apparatus according to the second embodiment of the present invention.

FIG. 5 is a flowchart illustrating a molding operation flow of the sheet lamination molding apparatus according to the second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a sheet lamination molding apparatus according to a third embodiment of the present invention.

FIG. 7 is a flowchart showing a molding operation flow of the sheet stacking and molding apparatus shown in FIG. 6;

FIG. 8 is a flowchart showing a molding operation flow of the sheet lamination molding apparatus shown in FIG.

FIG. 9 is a flowchart showing a molding operation flow of the sheet lamination molding apparatus according to the fourth embodiment of the present invention.

FIG. 10 is a flowchart showing a molding operation flow of a sheet lamination molding apparatus according to a fourth embodiment of the present invention.

FIG. 11 is a view showing a configuration of a conventional sheet additive manufacturing apparatus.

12 is a flowchart showing a molding operation flow of the sheet stacking and molding apparatus shown in FIG.

13 is a flowchart showing a molding operation flow of the sheet stacking and molding apparatus shown in FIG.

FIG. 14 is a view showing details of the sheet laminate shown in FIG. 11;

FIG. 15 is a diagram illustrating a state where an unnecessary area is removed from the sheet laminate illustrated in FIG. 11;

[Explanation of symbols]

1 sheet, 2 data processing section, 3 control section, 4 modeling section, 5 table section, 6 paper feed tray section, 7 laser printer section, 8 transport section, 9 intermediate tray section, 10, 14
Heater plate section, 11 cutting plotter section,
13 table, 15 sheet laminate, 16, 26 plate, 17, 31, 32, 33 heater unit, 1
8 trays, 19 fixing unit, 21 chains, 22 sprockets, 23 sheet holding mechanism, 24a tray,
24b Jogger, 27 cutter, 28 XY plotter, 29 effective area, 30 unnecessary area.

Claims (7)

(57) [Claims] 1. A data processing means for converting a supplied three-dimensional shape supplied from a three-dimensional CAD system into two-dimensional shape information of a section sliced in a height direction and supplying the converted information, and a sheet feeding unit for feeding sheets one by one. Means, sheet printing means for printing two-dimensional cross-sectional shape information on the sheet sent from the sheet feeding means based on the two-dimensional shape information supplied from the data processing means, and a printing surface of the printed sheet facing downward. Sheet transporting means for positioning and transporting the sheet, sheet transporting means for placing the sheet on which the transported printing surface is lower, and sheet placing means in a state where the sheet stack of printed sheets is loaded And a first sheet heating means for heating the sheet stack placed on the sheet placing means, which is disposed opposite to the sheet placing means, A first sheet heating means is provided, a sheet pressing means for pressing the sheet stack, and a sheet stacking means disposed between the sheet placing means and the sheet pressing means, the sheet stack being placed on the sheet mounting means. A sheet cutting means for cutting the uppermost one sheet along the two-dimensional cross-sectional shape printed on the sheet, and a sheet mounting means moved upward by the driving means to thereby heat the first sheet heated to a predetermined temperature. The sheet stack was pressed against the sheet pressing means provided with the sheet heating means for a predetermined time, and the driving means moved the sheet placing means downward so that the uppermost surface of the sheet stack reached the predetermined position of the sheet cutting means. Then, when one sheet of the uppermost surface of the sheet laminate is cut along the two-dimensional cross-sectional shape printed on the sheet by the sheet cutting means, and the above operation is performed until the predetermined height of the three-dimensional object is reached. , 3 And 3D object height determining means for determining whether reaches a predetermined height of the original object, if it is determined to have reached the predetermined height of the three-dimensional object,
The sheet placing means is moved upward by the driving means, and the sheet stack placed on the sheet placing means is pressed against the pressing means provided with the first sheet heating means, and the first sheet heating means is provided with the first sheet heating means. And a first sheet heating device stopping means for stopping the sheet heating means, wherein the second sheet heating means for heating the sheet laminate placed on the sheet placing means on the sheet placing means. After the first sheet heating means is stopped by the first sheet heating means stopping means, the sheet stack placed on the sheet placing means by the second sheet heating means is cooled at a predetermined temperature by a predetermined temperature. After heating for a period of time, the second sheet heating means is stopped.
A sheet heating means for stopping the sheet heating means. 2. An apparatus abnormality judging means for judging whether or not each part of the apparatus has an abnormality after cutting the sheet along the two-dimensional sectional shape printed on the sheet by the sheet cutting means,
When it is determined that there is an abnormality in each part of the apparatus, the driving unit moves the sheet placing unit upward to stack the sheet on the sheet pressing unit provided with the first sheet heating unit heated to a predetermined temperature. 2. The sheet additive manufacturing apparatus according to claim 1, wherein the body is pressed for a predetermined time, and thereafter, the first sheet heating means stopping means stops the first sheet heating means. 3. The apparatus according to claim 1, wherein the first and second sheet heating means heat the sheet laminate at a temperature higher than a melting point of the toner. . 4. A first and a second means provided on a sheet pressing means.
A third sheet heating means for heating the sheet at a lower temperature than the sheet heating means, and a first sheet heating means provided on the sheet placing means.
If it is determined that there is an abnormality in the fourth sheet heating unit that heats the sheet at a lower temperature than the second sheet heating unit and each unit of the apparatus, there is an abnormality in at least one of the sheet pressing unit and the sheet placing unit. Pressing / placement abnormality determining means for determining whether or not there is an abnormality. If it is determined that there is no abnormality in at least one of the sheet pressing means and the sheet mounting means, the driving means raises the sheet mounting means. To press the sheet stack against the sheet pressing means,
The first and second sheet heating means are stopped by the second sheet heating means stopping means, and the sheet stack is heated and held by the third and fourth sheet heating means. Means for determining whether the device abnormality has been resolved, and the third and fourth means for determining whether the device abnormality has been resolved.
Third and fourth sheet heating means stopping means for stopping the sheet heating means, and first sheet heating means activating means for operating the first sheet heating means when it is determined that the apparatus abnormality has been resolved. If it is determined that the apparatus abnormality has been eliminated, the third and fourth sheet heating means are stopped, and the first sheet heating means is operated to heat the sheet stack. The judgment means is 3
The apparatus according to claim 1, wherein it is determined whether the height of the three-dimensional object has reached a predetermined height. 5. A set time judging means for judging whether a set time for operating the third and fourth sheet heating means has been reached when it is judged that the apparatus abnormality has not been solved, and The third and fourth sheet heating means stopping means stops the third and fourth sheet heating means when it is determined that the set time for operating the sheet heating means has been reached. 3. The sheet additive manufacturing apparatus according to item 1. 6. The sheet laminating apparatus according to claim 1, wherein the sheet is made of a fiber fusion paper in which wood pulp fibers are fused. 7. The sheet additive manufacturing apparatus according to claim 6, wherein an acrylic resin is applied to a surface of the sheet.