WO2015115736A1

WO2015115736A1 - 3d printer using shaft linear motor

Info

Publication number: WO2015115736A1
Application number: PCT/KR2014/012692
Authority: WO
Inventors: 김홍윤; 권영목; 심호근; 윤영민
Original assignee: (주)티피씨 메카트로닉스
Priority date: 2014-02-03
Filing date: 2014-12-23
Publication date: 2015-08-06

Abstract

The present invention relates to a 3D printer using a shaft linear motor, comprising: a worktable on which a 3D model is manufactured; a printing module for printing the 3D model on the worktable; and the shaft linear motor for printing, which linearly moves the printing module and/or the worktable, wherein the shaft linear motor for printing comprises: a stator unit which is provided in a linear movement direction of the printing module and/or the worktable so as to guide a linear movement of the printing module and/or the worktable and has a permanent magnet provided therein; a mover unit which is provided to cover the outer circumferential surface of the stator unit and linearly moves along the stator unit by means of electromagnetic force which is generated between the mover unit and the permanent magnet when current is applied; a frame unit having a coil accommodating space in which the mover unit is provided, and is connected to the printing module and/or the worktable so as to linearly move the printing module and/or the worktable according to the linear movement of the mover unit; and a fluid providing unit provided at one side of the frame unit so as to provide low-temperature fluid into the frame unit, thereby allowing the low-temperature fluid to flow into the inner space of the frame unit so as to cool heat generated from the stator unit and the mover unit.

Description

3D printer using shaft linear motor

The present invention relates to a 3D printer using a shaft linear motor, and more particularly to a 3D printer using a shaft linear motor that can ensure the work accuracy and work stability in the process of working the 3D model.

The 3D printer refers to a device that converts three-dimensional design data and stacks materials such as polymer resin, metal, and the like in a liquid, powder form, and stacks them in a layer-by-layer process to produce a 3D model, that is, a three-dimensional object. 3D printing is a technology derived from RP (Rapid Prototyping), which refers to a technology for rapidly forming shapes to be produced by using various materials. In official technical terms, it is called additive manufacturing. Layer Mfg., Freeform Fab. Etc. are mixed and used.

Such 3D printers can be classified according to the lamination method and materials available for the production of three-dimensional objects. In the case of lamination, extrusion, jetting, light polymerization, powder sintering, etc., and materials include polymers such as PLA, ABS, HDPE, metals, Paper and the like.

Here, the extrusion method is a method of extruding and molding a material heated to a high temperature through a fine nozzle. The spray method is a method of ejecting and molding a high pressure liquid raw material. The photocuring method is a method of solidifying a material by using a polymerization reaction occurring in a photocurable plastic by irradiation of light, and the powder sintering method is a powder having a melting point or It is a method of solidifying by heating enough to cause partial melting.

1 is a view for explaining the principle of a conventional extrusion type 3D printer. Referring to FIG. 1, the extrusion type 3D printer is a method of stacking materials by melting a thin thread, that is, a filament-like thermoplastic material in a nozzle 330 and outputting a thin film. It emits high temperature enough to melt the plastic and hardens it at room temperature.

In more detail, the filament wound on the filament spool 310 is moved to the nozzle 330 side by the extruder 320, and the filament heated in the nozzle 330 is discharged from the nozzle 330 and laminated, The 3D model is produced.

This extrusion type 3D printer has the advantage of low equipment cost and maintenance cost because the structure and program of the device is simpler than other methods. In addition, it is developed in the form of open source, leading the popularization of 3D printing technology, it is possible to apply a variety of materials, and due to the simple structure, it is easy to large-scale and has an advantage that can be applied to various industrial fields.

On the other hand, the surface roughness is relatively low, there is a disadvantage that the implementation of the detailed shape is insufficient, a support for preventing the flow of the material during the curing is required, there is a disadvantage that the manufacturing speed is relatively slow. However, the extrusion-type 3D printer is expected to achieve the mainstream of the 3D printer market in the future because it is easy to be distributed to the home, such as personal, due to the above advantages.

Here, in the case of a 3D printer, including an extrusion-type 3D printer, the printing module composed of the extruder and the feeder shown in Figure 1 must move in the X-axis and Y-axis direction in order to produce a 3D model, responsible for the linear motion of the printing module. Structure is installed. In some 3D printers, a structure that is responsible for movement in the Z-axis direction must also be installed.

The structure responsible for the linear motion is to use a motorized belt structure applied to the motor, there is a problem that it is not suitable for the production of a more precise 3D model due to the problem of repetition precision or accuracy due to the backlash (Backlash).

Accordingly, an object of the present invention is to provide a 3D printer using a shaft linear motor capable of producing a precise 3D model by guaranteeing repeatability and accuracy.

In addition, the conventional rotary motor solves the problems caused by the cooling effect caused by cooling by using a heat sink or a fan to improve the stability of the work and the accuracy of the work, and at the same time extend the product life of the shaft linear motor Another object is to provide a used 3D printer.

In addition, it is another object to provide a 3D printer using a shaft linear motor that can solve the problem of damaging the 3D model being produced by opening the door installed in the 3D printer during the work more stable.

According to the present invention, there is provided a work table in which a 3D model is manufactured, a printing module for printing a 3D model on the work table, and a printing shaft linear motor for linearly moving at least one of the printing module and the work table. Includes; The printing shaft linear motor is installed along a linear movement direction of at least one of the printing module and the work table to guide the linear movement of at least one of the printing module and the work table, and a stator part having a permanent magnet provided therein. And, it is installed so as to surround the outer circumferential surface of the stator portion, the movable part for moving linearly along the stator part by the electromagnetic force generated between the permanent magnet when the current is applied, and the coil housing in which the movable part is installed inside A space is provided, connected to at least one of the printing module and the work table, a frame part for linearly moving at least one of the printing module and the work table according to a linear movement of the movable part, and installed at one side of the frame part. To provide a low temperature fluid into the frame portion Including the systems studied; The low temperature fluid is achieved by a 3D printer using a shaft linear motor, characterized in that for cooling the heat generated in the stator portion and the movable portion while flowing through the inner space of the frame portion.

Here, it may be provided on the other side of the frame portion, further comprising a flow control valve for adjusting the flow rate of the fluid in the inner space of the frame portion.

In addition, the stator portion is a hollow inside, the stator frame is provided with a plurality of through holes on the outer peripheral surface; And the permanent magnet installed in the inner space of the stator frame, and when the fluid is supplied from the fluid providing part to the frame part, the fluid introduced into the inner space of the frame part passes through the plurality of through holes through the movable part. Through the flow into the stator frame, it is possible to remove the heat of the permanent magnet.

The stator frame may be made of aluminum.

In addition, a plurality of coil members installed in the fixing unit frame so as to surround the outer periphery of the stator frame, having a ring-shaped cross section; And a plurality of insulating members installed on the stator frame to be in close contact with the annular cross section of the coil member, and installed between the plurality of coil members.

In addition, the insulating member, the insulating plate having a ring shape corresponding to the cross section of the coil member; And an insulation guide formed to protrude from both outer surfaces of the insulation plate to both sides of the insulation plate.

Here, the frame unit, the coil receiving space is provided, the movable frame provided with the fluid providing unit on the outside; A first coupling member coupled to an open side of the mover frame; And a second coupling member coupled to the other open side of the mover frame to close the coil accommodation space, thereby fixing positions of the plurality of coil members and the plurality of insulation members in the coil accommodation space. Can be.

The first coupling member may be inserted into the coil accommodation space and may be integrally formed with the first protrusion and the first protrusion, which surround the coil member accommodated in the coil accommodation space and contact the insulating member. The first coupling body may cover one side of the mover frame and have a structure through which the stator frame penetrates, and the first coupling body may be bolted to the mover frame.

In addition, the first protrusion has an annular cross section having an outer diameter larger than an outer diameter of the coil member and an outer diameter smaller than the inner diameter of the coil accommodating member, and the first protrusion has the insulation when inserted as the coil accommodating space. A force may be applied to the insulating member while being in contact with the member to prevent the occurrence of a gap between the plurality of coil members and the plurality of insulating members.

The second coupling member may be inserted into the coil accommodation space, and may be integrally formed with the second protrusion and the second protrusion that surround the coil member accommodated in the coil accommodation space and contact the insulating member. The second coupling body may cover the other side of the mover frame and have a structure through which the stator frame penetrates, and the second coupling body may be bolted to the mover frame.

The second protrusion has an annular cross section having an outer diameter larger than an outer diameter of the coil member and an outer diameter smaller than an inner diameter of the coil accommodating member, and the second protrusion has the insulation when inserted as the coil accommodating space. A force may be applied to the insulating member while being in contact with the member to prevent the occurrence of a gap between the plurality of coil members and the plurality of insulating members.

Here, an accommodation space for accommodating the work table and the printing module is formed, the main body frame having an opening opening in the front, a door for opening and closing the opening of the main body frame, a lock for locking and unlocking the door Further comprising a shaft linear motor; The locking shaft linear motor is a cylindrical locking mover module in which a locking permanent magnet is accommodated therein, and is installed in the door to surround an outer circumferential surface of the locking mover module, and the locking permanent magnet is applied when a current is applied. A coil for generating an electromagnetic force therebetween with a magnet is received therein, the locking stator module for linearly moving the locking mover module by the electromagnetic force; The locking frame is formed in a lock hole into which the lock mover module is inserted and released, and the lock mover module is inserted into and released from the lock hole according to a current applied to the lock stator module. Can be locked and unlocked.

And a control unit for controlling the printing module and the printing shaft linear motor to print the 3D model on the work table, and controlling the locking shaft linear motor to lock the door during printing of the 3D model. It may further include.

According to the configuration as described above, according to the present invention, due to the implementation of the linear motion by the shaft linear motor, the backlash in the linear motion by the conventional pulley or gear is eliminated to simplify the structure and high repeatability, A 3D printer with a shaft linear motor with high accuracy and improved manufacturing speed due to high speed and acceleration is provided.

In addition, by supplying a low-temperature fluid directly to the mover portion of the printing shaft linear motor, the heat generated during operation of the mover portion is absorbed by the low-temperature fluid, it is possible to cool the heated coil, thereby printing By improving the efficiency of the shaft linear motor, the stability and accuracy of 3D printing can be improved.

In addition, by cooling the coil generating high temperature heat, the performance of the coil member is reduced by the heat generated in the coil member when the current is applied to the coil member, thereby reducing the frequency of failure of the stator part and the movable part, thereby reducing the overall 3D printer. Can extend the life of the product.

1 is a view for explaining the principle of a conventional extrusion type 3D printer,

2 is a perspective view of a 3D printer according to the present invention;

3 is a view for explaining the internal structure of the 3D printer shown in FIG.

4 is a view for explaining a shaft linear motor for printing of a 3D printer according to the present invention,

5 is a view schematically showing a connection state between the components of the shaft linear motor for printing of the 3D printer according to the present invention,

6 is a schematic exploded perspective view of a shaft linear motor for printing of a 3D printer according to the present invention;

7 is a view schematically showing an exploded perspective view of a movable part of a shaft linear motor for printing of a 3D printer according to the present invention;

8 is a view for explaining the operating state of the locking shaft linear motor of the 3D printer according to the present invention.

3D printer using a shaft linear motor according to the present invention is a printing table for printing a 3D model work, a printing module for printing a 3D model on the work table, and at least one of the printing module and the work table for linear movement A shaft linear motor; The printing shaft linear motor is installed along a linear movement direction of at least one of the printing module and the work table to guide the linear movement of at least one of the printing module and the work table, and a stator part having a permanent magnet provided therein. And, it is installed so as to surround the outer circumferential surface of the stator portion, the movable part for moving linearly along the stator part by the electromagnetic force generated between the permanent magnet when the current is applied, and the coil housing in which the movable part is installed inside A space is provided, connected to at least one of the printing module and the work table, a frame part for linearly moving at least one of the printing module and the work table according to a linear movement of the movable part, and installed at one side of the frame part. To provide a low temperature fluid into the frame portion Including the systems studied; The low temperature fluid cools heat generated in the stator part and the movable part while flowing in the inner space of the frame part.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment according to the present invention.

2 is a perspective view of the 3D printer 1 according to the present invention, Figure 3 is a view for explaining the internal structure of the 3D printer 1 shown in FIG. Referring to FIGS. 2 and 3, the 3D printer 1 according to the present invention includes a main frame 10, a door 20, a printing module 30, and a shaft linear motor 100 for printing. .

The main body frame 10 has a substantially rectangular shape, and an accommodation space is formed therein to accommodate components such as the printing module 30 and the shaft linear motor 100 for printing. An open opening is formed in front of the main body frame 10, and the door 20 opens and closes the opening, thereby moving the 3D model manufactured through the 3D printing operation to the outside through the door 20.

Here, the technical idea of the present invention is not limited to the shape of the main body frame 10, the position of the door 20, etc. in various forms based on the technical idea of the present invention if those skilled in the art Of course it can be produced.

The work table 40 on which the 3D model generated by the printing module 30 is seated is formed in the lower part of the main frame 10, and printing is performed on the work table 40 while being spaced apart from the work table 40. Module 30 is installed.

The printing module 30 prints the 3D printing model on the work table 40. The 3D printer 1 according to the present invention is an example of the extrusion method 3D printer 1 bar, the printing module 30 is an extruder (not shown) for moving the filament 50 and the filament moving by the extruder ( A nozzle (not shown) for heating and discharging 50 may be included.

Here, the configuration of the printing module 30 may be provided in various forms known in the art, the detailed description thereof will be omitted. In addition, in the present invention, the 3D printer 1 uses an extrusion method as an embodiment. When the 3D printer 1 is applied to another method of the 3D printer 1, the printing module 30 includes components according to the method.

Meanwhile, the printing shaft linear motor 100 linearly reciprocates at least one of the printing module 30 and the work table 40. In the present invention, the printing shaft linear motor 100 is provided to linearly move the printing module 30 in the X axis direction and the Y axis direction, and the printing shaft linear motor 100 moves the work table 40 on the Z axis. The linear movement in the direction is taken as an example.

Here, reference numeral 110a of FIG. 3 is a guide bar for guiding a linear movement of the printing module 30 and the work table 40.

Hereinafter, a shaft linear motor for printing according to the present invention will be described in detail with reference to FIGS. 4 to 7.

As shown in FIG. 4, the printing shaft linear motor 100 according to the embodiment of the present invention includes a stator 110, a mover 120, a frame 130, and a fluid providing unit 140. It includes a flow control valve 150.

The stator part 110 according to an embodiment of the present invention is installed inside the main body frame 10 along the linear movement direction of the printing module 30 and the work table 40 to print the module 30 and the work table 40. Guides a straight line movement.

The stator part 110 according to the present invention includes a stator frame 111 and a permanent magnet 113. In the stator frame 111 according to the exemplary embodiment of the present invention, as illustrated in FIG. 6, a plurality of through holes 112 are provided on an outer circumferential surface thereof.

Here, the plurality of through holes 112 are openings that can communicate with the internal space of the stator frame 111. In one embodiment of the present invention, the stator frame 111 is preferably made of aluminum.

In an embodiment of the present invention, the permanent magnet 113 in which the N pole and the S pole are sequentially arranged is installed in the internal space of the stator frame 111. Arrangement structure of the permanent magnet 113 installed in the stator frame 111 and the operation method of the stator part 110 and the movable part 120 is a technology falling within the obvious range from the position of those skilled in the art, in the present specification The description will be omitted.

In an embodiment of the present invention, the movable unit 120 and the frame unit 130 will be described.

5 to 7, the movable part 120 according to the exemplary embodiment of the present invention includes a plurality of coil members 121 and a plurality of insulating members 122. Here, the movable part 120 is installed to surround the outer circumference of the stator frame 111, and is a member that linearly moves along the longitudinal direction of the stator frame 111 when a current is applied to the coil member 121.

In one embodiment of the present invention, the plurality of coil members 121 are installed in the stator frame 111 to surround the outer circumference of the stator frame 111. In the present embodiment, the plurality of coil members 121 are members that generate electromagnetic force with respect to the permanent magnet 113 provided in the stator part 110 when the current is applied.

As shown in Figure 6, the coil member 121 according to an embodiment of the present invention has an annular cross-section, it is preferable to have a cylindrical structure having a predetermined thickness depending on the degree of the coil wound.

Coil member 121 according to an embodiment of the present invention has a structure in which the stator frame 111 penetrates. Accordingly, the inner diameter of the coil member 121 according to an embodiment of the present invention preferably has a diameter larger than the outer diameter of the stator frame 111.

Coil member 121 according to an embodiment of the present invention is inserted into the stator frame 111, the stator frame 111 to be movable along the longitudinal direction of the stator frame 111 when the current is applied to the coil member 121 It is preferably installed in. As shown in FIG. 7, an insulating member 122 is disposed between the plurality of coil members 121.

6 and 7, in one embodiment of the present invention, the plurality of insulating members 122 are installed between the plurality of coil members 121.

It is installed in the stator frame 111 to be in close contact with the annular cross-section of the plurality of coil members 121, so that the current of the coil member 121 is not directly transmitted to the stator frame 111.

That is, in one embodiment of the present invention, the plurality of insulating members 122 are provided between the plurality of coil members 121, partitioning the plurality of coil members 121, to any one coil member 121 While the current flowing does not affect the coil member 121 positioned adjacent thereto, the plurality of coil members 121 are prevented from directly contacting the stator frame 111, and thus the coil member 121 It is possible to prevent the current flowing through the stator frame 111.

In one embodiment of the present invention, the insulating member 122 is composed of an insulating plate 122a and an insulating guide 122b.

As shown in Figure 6, the insulating plate 122a according to an embodiment of the present invention preferably has an annular structure corresponding to the cross section of the coil member 121. The inner diameter of the insulating plate 122a preferably has a diameter larger than the outer diameter of the stator frame 111.

In one embodiment of the present invention, the outer diameter of the insulating plate 122a preferably has the same diameter as the outer diameter of the coil member 121. An insulating guide 122b is formed on the outer circumferential surface of the insulating plate 122a.

In one embodiment of the present invention, the insulating guide 122b is preferably formed to protrude to both sides of the insulating plate 122a from the outer peripheral surface of the insulating plate 122a. When any one of the insulating members 122 is installed between the two coil members 121, the insulating plate 122a is in close contact with the side of the two adjacent coil members 121, the insulating guide 122b ) Is preferably installed to surround a portion of the outer circumference of the two coil member 121.

Hereinafter, the frame unit 130 will be described.

In one embodiment of the present invention, the frame unit 130, as shown in Figure 3, is connected to the printing module 30 and the work table 40 in accordance with the linear movement of the movable unit 120, the printing module ( 30) and the work table 40 is linearly moved.

In addition, the frame part 130 is a member for fixing the movable part 120. That is, the frame unit 130 according to the embodiment of the present invention closes the coil receiving space 132 in a state where the plurality of coil members 121 and the plurality of insulating members 122 are accommodated in the coil receiving space 132. To fix the arrangement between the plurality of coil members 121 and the plurality of insulating members 122.

6 and 7, the frame unit 130 according to an embodiment of the present invention includes a mover frame 131, a first coupling member 133, and a second coupling member 137. .

The mover frame 131 according to an embodiment of the present invention is a member provided with a coil accommodation space 132 therein, and has a structure in which the coil accommodation space 132 can communicate with the outside. Here, the coil accommodating space 132 is a space in which the coil member 11 and the insulating member 122 are installed, and preferably has a cylindrical shape.

At this time, the inner diameter of the movable frame 131 preferably has a diameter larger than the outer diameter of the coil member 121 and the insulating member 122. And, in one embodiment of the present invention, the mover frame 131 is preferably made of an insulating material so that the current applied to the coil member 121 does not flow.

In one embodiment of the present invention, the fluid inlet opening 131a and the fluid outlet opening 131b having a structure in communication with the coil receiving space 132 is provided on the outer surface of the movable frame 131. Here, the fluid inlet opening 131a is connected to the fluid providing unit 140. In addition, a flow rate control valve 150 is installed at the fluid outlet opening 131b. The fluid providing unit 140 and the flow control valve 150 will be described later.

On the other hand, in one embodiment of the present invention, the first coupling member 133 is a member coupled to one side of the movable frame 131 to close the open one side of the coil receiving space 132. In one embodiment of the present invention, the first coupling member 133 is composed of a first protrusion 134 and the first coupling body 135 inserted into the coil receiving space 132.

In this embodiment, the first protrusion 134 is provided to protrude from one side of the first coupling body 135, the inner diameter is larger than the outer diameter of the coil, the outer diameter is smaller than the diameter of the coil receiving space 132 annular cross section It is preferable to have.

Accordingly, when the first coupling member 133 according to the exemplary embodiment of the present invention is installed in the movable frame 131, the first protrusion 134 may have a first coupling member having an inner circumferential surface of the first protrusion 134. Surrounding the outer circumference of the coil member 121 positioned adjacent to (133), the longitudinal section of the first protrusion 134 is installed to engage with one side of the insulating guide 122b of the insulating member 122. At this time, the first protrusion 134 is preferably fitted into the coil receiving space 132 of the mover frame 131.

In one embodiment of the present invention, the first coupling body 135 is formed integrally with the first protrusion 134, it is preferable to have a structure that can cover one side of the movable frame (131). In addition, the appearance of the first coupling body 135 according to an embodiment of the present invention preferably has a structure corresponding to the appearance of the movable frame 131.

The first coupling body 135 is preferably provided with a body through hole 135a through which the stator frame 111 passes. In one embodiment of the invention, the first coupling body 135 is preferably bolted to the mover frame 131 by a bolt 136.

On the other hand, in one embodiment of the present invention, the second coupling member 137 is composed of a second protrusion 138 and the second coupling body 139 is inserted into the coil receiving space 132.

In this embodiment, the second protrusion 138 is provided to protrude from one side of the second coupling body 139, the inner diameter is larger than the outer diameter of the coil, the outer diameter is smaller than the diameter of the coil receiving space 132 annular cross section It is preferable to have.

Accordingly, when the second coupling member 137 according to the exemplary embodiment of the present invention is installed in the mover frame 131, the second protrusion 138 may have a second coupling member having an inner circumferential surface of the second protrusion 138. Surrounding the outer circumference of the coil member 121 positioned adjacent to (137), the longitudinal section of the second protrusion 138 is installed to engage with one side of the insulating guide 122b of the insulating member 122. At this time, the second protrusion 138 is preferably fitted to the coil receiving space 132 of the mover frame 131.

In one embodiment of the present invention, the second coupling body 139 is formed integrally with the second protrusion 138, it is preferable to have a structure that can cover the other side of the movable frame 131. In addition, the appearance of the second coupling body 139 according to an embodiment of the present invention preferably has a structure corresponding to the appearance of the movable frame 131 as in the first coupling body 135 described above.

It is preferable that the second coupling body 139 is provided with a body through-hole 139a through which the stator frame 111 passes. In one embodiment of the invention, the second coupling body 139 is preferably bolted to the mover frame 131 by a bolt 136.

Hereinafter, the fluid providing unit 140 and the flow regulating valve 150 according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6.

As shown in FIG. 4, the fluid supply unit 140 is connected to the fluid inlet opening 131a provided on the outside of the mover frame 131 by a fluid supply pipe, and the mover frame 131 at a predetermined pressure. The coil receiving space 132 is a member for providing a low temperature fluid. As the fluid providing unit 140 according to an embodiment of the present invention, an air pressure pump may be used. However, the present invention is not limited thereto.

In one embodiment of the present invention, the low-temperature fluid may be used at room temperature air, and a fluid capable of easily cooling the heated coil member 121 from the standpoint of the industry, without limiting the type of fluid Is variable.

In the printing shaft linear motor 100 according to an embodiment of the present invention, when the fluid providing unit 140 is operated, the fluid providing unit 140 is provided to the coil receiving space 132 of the mover frame 131. The fluid contacts the plurality of coil members 121 accommodated in the coil accommodating space 132, and serves to absorb the heat of the coil member 121 to cool the coil member 121.

In addition, the fluid introduced into the coil accommodating space 132 not only cools the coil member 121 but also flows into the internal space of the stator frame 111 through the plurality of through holes 112 provided in the stator frame 111. In order to absorb the heat of the permanent magnets 113 while being in contact with the permanent magnets 113, the permanent magnets 113 serve to cool the same.

Fluid providing unit 140 according to an embodiment of the present invention is connected to the frame portion 130 to protect the movable part 120, heated to about 100 ℃ or more during operation of the printing shaft linear motor 100 Provides a low temperature fluid directly to the coil member 121, absorbs heat to the coil member 121 in a high temperature state, and absorbs the heat of the permanent magnet 113 heated by the heat generated from the coil member 121 Thereby, by cooling the movable part 120 and the stator part 110, the operation efficiency of the printing shaft linear motor 100 can be improved.

On the other hand, the flow control valve 150 according to an embodiment of the present invention is connected to the fluid outlet opening (131b). In one embodiment of the present invention, the flow control valve 150 is a member for adjusting the amount of fluid introduced into the mover frame 131 through the fluid providing unit 140. That is, in one embodiment of the present invention, the flow control valve 150 controls the opening and closing degree of the fluid outlet opening (131b), the amount of fluid introduced into the coil receiving space 132 of the mover frame (131) I can regulate it.

Meanwhile, the 3D printer 1 according to the present invention may further include a locking shaft linear motor 200 that locks and unlocks the door 20 with respect to the body frame 10. 8 is a view for explaining the operating state of the locking shaft linear motor 200 of the 3D printer 1 according to the present invention.

Referring to FIG. 8, the locking shaft linear motor 200 according to the present invention may include a locking mover module 220 and a locking stator module 210.

The lock mover module 220 has a cylindrical shape in which a lock permanent magnet (not shown) is accommodated. In addition, the locking stator module 210 is installed in the door 20 to surround the outer circumferential surface of the locking mover module 220. When a current is applied to the locking stator module 210, a coil (not shown) for generating an electromagnetic force between the locking permanent magnet is accommodated inside the locking stator module 210 and movable for locking by the electromagnetic force. The child module 220 is moved linearly.

Here, the main body frame 10, as shown in Figure 8, the locking mover module 220 is formed in the lock hole 11 is inserted and released, the current applied to the lock stator module 210 As a result, the locking mover module 220 is inserted into and released from the lock hole 11 to lock and unlock the door 20.

Here, the control unit (not shown) for controlling the printing module 30 and the printing shaft linear motor 100 so that the 3D model is printed on the function of the 3D printer 1 according to the present invention, that is, the work table 40 is When the printing operation of the 3D model, the locking shaft linear motor 200 may be controlled to lock the door 20.

As a result, the opening of the door 20 is automatically blocked in the 3D printing process, thereby preventing the damage of the 3D model in operation or a disaster that may occur to the worker by opening the door 20 due to a mistake.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes within the scope not departing from the technical idea of the present invention are common in the art. It will be apparent to those who have knowledge.

1: 3D printer 10: Body frame

20: door 30: printing module

40: work table

100: printing shaft linear motor 110: stator part

120: movable part 130: frame part

131: movable frame 131a: fluid inlet opening

131b: fluid outlet opening 133: first coupling member

134: first protrusion 135: first coupling body

137: second coupling member 138: second projection

139: second coupling body 140: fluid supply

150: flow control valve

200: locking shaft linear motor 210: locking stator module

220: locking mover module

The present invention converts three-dimensional design data into a 3D printer, which is a device for manufacturing 3D models, that is, three-dimensional objects, by stacking materials such as polymer resin, metal, and the like in liquid and powder form by processing and layering-by-layer. Applicable

Claims

A work table on which the 3D model is built,

A printing module for printing a 3D model on the work table;

A printing shaft linear motor for linearly moving at least one of the printing module and the work table;

The printing shaft linear motor

A stator unit installed along a linear movement direction of at least one of the printing module and the work table to guide the linear movement of at least one of the printing module and the work table, and having a permanent magnet provided therein;

A movable part installed to surround an outer circumferential surface of the stator part and linearly moving along the stator part by an electromagnetic force generated between the permanent magnets when an electric current is applied;

A coil accommodating space in which the movable part is installed is provided, and connected to at least one of the printing module and the work table to linearly move at least one of the printing module and the work table according to the linear movement of the movable part. With frame part,

A fluid providing part installed at one side of the frame part to provide a low temperature fluid into the frame part;

The low temperature fluid flows through the inner space of the frame portion to cool the heat generated in the stator portion and the mover portion 3D printer using a shaft linear motor.
The method of claim 1,

Is installed on the other side of the frame portion, 3D printer using a shaft linear motor, characterized in that it further comprises a flow control valve for adjusting the flow rate of the fluid in the inner space of the frame portion.
The method of claim 1,

The stator part

A stator frame having a hollow inside and provided with a plurality of through holes on an outer circumferential surface thereof; And

It includes the permanent magnet installed in the inner space of the stator frame,

When the fluid is supplied from the fluid providing part to the frame part, the fluid introduced into the inner space of the frame part is introduced into the stator frame through the plurality of through holes via the movable part, thereby heating the permanent magnet. 3D printer using a shaft linear motor, characterized in that for removing.
The method of claim 1,

The stator frame is a 3D printer using a shaft linear motor, characterized in that made of aluminum material.
The method of claim 1,

The movable part,

A plurality of coil members installed in the fixing part frame to surround the outer circumference of the stator frame and having an annular cross section; And

3D printer using a shaft linear motor, characterized in that it is provided in the stator frame so as to be in close contact with the annular cross-section of the coil member, a plurality of insulating members provided between each of the plurality of coil members.
The method of claim 5,

The insulating member,

An insulation plate having an annular shape corresponding to a cross section of the coil member; And

3D printer using a shaft linear motor, characterized in that made of an insulating guide protruding from the outer peripheral surface of the insulating plate to both sides of the insulating plate.
The method of claim 1,

The frame portion,

A movable frame provided with the coil receiving space and provided with the fluid providing part at an outer side thereof;

A first coupling member coupled to an open side of the mover frame; And

And a second coupling member coupled to the other open side of the mover frame to close the coil accommodation space, thereby fixing the positions of the plurality of coil members and the plurality of insulation members in the coil accommodation space. 3D printer using a shaft linear motor.
The method of claim 7, wherein

The first coupling member,

A first protrusion inserted into the coil accommodating space and surrounding the coil member accommodated in the coil accommodating space and in contact with the insulating member;

It is formed integrally with the first protrusion, it is made of a first coupling body having a structure that can cover one side of the mover frame and the stator frame is penetrated,

The first coupling body is a 3D printer using a shaft linear motor, characterized in that the bolting coupled to the mover frame.
The method of claim 8,

The first protrusion has an annular cross section having an outer diameter larger than an outer diameter of the coil member and an outer diameter smaller than an inner diameter of the coil receiving member.

The first protrusion is applied to the insulating member while contacting the insulating member when inserted as the coil receiving space to prevent the occurrence of a gap (gap) between the plurality of coil members and the plurality of insulating members. 3D printer using a shaft linear motor.
The method of claim 7, wherein

The second coupling member,

A second protrusion inserted into the coil accommodating space and surrounding the coil member accommodated in the coil accommodating space and in contact with the insulating member;

It is formed integrally with the second protruding portion, the second coupling body may cover the other side of the mover frame and has a structure through which the stator frame penetrates, and the second coupling body is bolted to the mover frame. 3D printer using a shaft linear motor, characterized in that coupled.
The method of claim 10,

The second protrusion has an annular cross section having an outer diameter larger than an outer diameter of the coil member and an outer diameter smaller than an inner diameter of the coil receiving member.

The second protrusion is applied to the insulating member while contacting the insulating member when inserted as the coil receiving space to prevent the occurrence of a gap (gap) between the plurality of coil members and the plurality of insulating members. 3D printer using a shaft linear motor.
The method of claim 1,

An accommodation space for accommodating the work table and the printing module, the body frame having an opening that is open in front;

A door for opening and closing the opening of the main body frame;

A locking shaft linear motor for locking and unlocking the door;

The locking shaft linear motor,

Cylindrical locking mover module for receiving a permanent magnet for locking therein,

It is installed on the door to surround the outer circumferential surface of the locking mover module, a coil for generating an electromagnetic force between the locking permanent magnet when the current is applied is received therein, the locking mover module by the electromagnetic force A locking stator module for linearly moving the screw;

The locking frame is formed in a lock hole into which the lock mover module is inserted and released, and the lock mover module is inserted into and released from the lock hole according to a current applied to the lock stator module. 3D printer using a shaft linear motor, characterized in that for locking and unlocking.
The method of claim 12,

A control unit for controlling the printing module and the printing shaft linear motor to print the 3D model on the work table, and controlling the locking shaft linear motor to lock the door during printing of the 3D model. 3D printer using a shaft linear motor, characterized in that it comprises a.