KR102391217B1 - Prefabricated 3D Food Printer - Google Patents

Abstract

In particular, the present invention relates to a prefabricated 3D food printer that can freely form the shape of solidified food such as chocolate by assembling it directly by a user. An end effector 30 provided with a printer body, a discharging means installed in the third driving unit 23 and discharging food in a molten state through a hopper 34 and a hopper lower portion 343, and a plate-shaped member On the upper surface, the stage 40 on which the molding material discharged from the end effector 30 is seated; the discharging means is installed in the form of penetrating the lower part along the center of the hopper 34, and from a predetermined portion to the lower part of the hopper To provide a prefabricated 3D food printer characterized in that the spiral blade is formed along the outer circumferential surface to a point penetrating 343, so that the food is forcibly discharged at a constant speed along the spiral blade according to the rotation of the dispensing means.

Description

Prefabricated 3D Food Printer

The present invention relates to a 3D printer, and more particularly, to a prefabricated 3D food printer in which a user can freely form the shape of coagulated food such as chocolate by assembling it himself.

3D printers are widely used not only in simple sculptures but also in construction, medical care, and various manufacturing fields as their structure is simplified due to the development of technology. extended to the food sector.

In the case of the food area, it can be used not only in commercial restaurants but also in general homes, and it is manufactured in a modular format so that one 3D printer can be used for various purposes at home. They are also sold so that they can be assembled and manufactured to fit your needs.

However, in particular, in the case of the food area, most of the 3D printer models developed and used recently have a syringe-type piston-cylinder type, as in the prior art No. 10-1655091 shown in FIG. .

When discharge is made in the piston-cylinder form, one continuous discharge amount is limited due to the limitation of the internal volume of the cylinder. , There is a risk that the part where the work was stopped may be finished in an unnatural shape.

Patent Registration Publication No. 10-1655091 (Announcement Date: 2016. 09. 07)

Accordingly, the present invention has a structure in which discharge of the molding material can be made continuously and the supply of the molding material can also be made continuously without interruption. Also, even if a small assembly error occurs in the process of assembling by a consumer at home, the discharge is performed normally and uniformly We want to provide a prefabricated 3D food printer that can print high quality.

The prefabricated 3D food printer according to the present invention for achieving this object includes a base frame 10 that is seated on a solid floor, a first rail 212 and a first driving motor installed in the horizontal direction on the base frame 10. (211) and a first driving unit 21 made of a first motion transmitting member, driven by the first driving unit 21 and variable, a second rail 222, a second driving motor 221, and a second motion transmitting member It consists of a second driving unit 22 made of , a 3D printer body arranged so that two of the directions of the first to third rails 232 are orthogonal to each other and the other is a vertical axis, and the third driving unit 23 is variable, solidifying and An end effector 30 comprising: a hopper 34 into which the molten reversible food is supplied; The molten food discharged through the discharging means is solidified while being stacked along the variable path of the end effector 30, and is composed of a lamination stage 40, which is a plate-shaped member on the upper surface, wherein the discharging means is a hopper 34 ) is installed in the form of penetrating the lower part along the center, and a spiral blade is formed along the outer circumferential surface from a predetermined portion to a point penetrating the lower hopper 343, so that the food is fed at a constant speed along the spiral blade according to the rotation of the discharging means. is forcibly discharged.

Here, the hopper 34 preferably has a horizontal diameter gradually decreasing from the top to the bottom, and from the point where the horizontal diameter is the minimum at the bottom of the hopper 34, the horizontal diameter is constant by a predetermined length toward the bottom. The formed forced transport section is formed, and the food is uniformly mixed while passing through the forced transport section, thereby maintaining a constant discharge pressure.

In this case, the member constituting the forced transport section is preferably detachably coupled to the lower end of the hopper 34, and a nozzle for determining the discharge thickness of the discharged food is installed at the lower end of the member, and a plurality of the members are set. provided, and each of the plurality of nozzles has a different diameter.

In addition, the end effector is fixed to the bracket 31 and the bracket 31 variably installed along the third rail 232 while the hopper 34 and the portion on which the hopper 34 can be mounted are formed. It is installed and consists of a discharge motor 32 for rotating the spiral blade, the bracket 31 is preferably made of a strong elastic material, the portion where the hopper 34 is seated on the bracket 31 and the discharge motor 32 ) is installed on the bracket 31 is spaced apart from each other, the relative position between the hopper 34 and the discharge motor 32 due to elastic deformation of the bracket 31 is variable.

Here, the bracket 31 is installed in the horizontal direction on the main vertical plate 312 , the motor seating plate 311 formed by bending the upper part of the main vertical plate 312 in the horizontal direction, and the lower part of the main vertical plate 312 . It consists of a hopper holder 313 that becomes (34) is possible to vary relative to each other, so that a minute error between the center of the discharging means and the hopper 34 generated during the assembly process of the end effector 30 is corrected by the elastic force of the bracket 31 while the discharging motor 32 is driven. do.

At this time, the discharging means is preferably connected to the motor shaft 331 protruding from the lower part of the discharging motor 32 toward the center of the hopper 34 and the motor shaft 331 in parallel to the lower portion and disposed at the center of the hopper 34 . and the discharge screw 334 in which the spiral blade is formed along the outer circumferential surface, and the motor shaft 331 and the discharge screw 334 so that the coupling angle between the motor shaft 331 and the discharge screw 334 is variable. By forming the link 332 , a minute error between the discharging means and the center of the hopper 34 is corrected by the elastic deformation of the elastic link 332 .

In addition, the hopper 34 includes a hopper body 342 having a constant horizontal diameter, a hopper upper portion 341 formed on the hopper body 342 upper portion and having a larger horizontal diameter than the hopper body 342 , and a hopper body 342 . ) is formed in the lower portion and is composed of a hopper lower part 343 whose horizontal diameter is gradually reduced toward the lower part, and between the outer peripheral surface of the hopper body 342 and the outer peripheral surface of the hopper upper part 341, preferably the hopper upper part 341 side A horizontal step in a form in which the horizontal diameter of is expanded is formed, and the hopper holder 313 is formed in a shape corresponding to the bottom of the horizontal step, so that the hopper 34 is easily detachably seated on the hopper holder 313. .

The prefabricated 3D food printer according to the present invention has a structure in which the ejection of the molding material can be made continuously and the supply of the molding material can also be made continuously without interruption. It has the effect of enabling the output of uniform quality as the discharge is performed normally.

1 is a perspective view of a conventional 3D food printer;
2 is a perspective view of a 3D food printer according to the present invention;
3 is a front view of FIG. 2;
Figure 4 is a side view of Figure 2;
Figure 5a is an enlarged perspective view of the end effector 30 in Figure 2,
Fig. 5b is a side view of Fig. 5a;
Fig. 5c is a front view of Fig. 5a;
Figure 6 is an exploded perspective view of Figure 5a;
7 is an operational state diagram of FIG. 5A;
Figure 8 is a photograph of Figure 5a;

Specific structural or functional descriptions presented in the embodiments of the present invention are only exemplified for the purpose of describing embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

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

As shown in FIG. 2 , the prefabricated 3D food printer according to the present invention includes a basic frame 10 , a 3D printer body, an end effector 30 , and a stage 40 .

The base frame 10 is a member that supports the main body, the end effector 30 and the stage 40 so that they can be firmly installed thereon.

The base frame 10 is a structure supporting the 3D printer body, which will be described later. Therefore, if the 3D printer body can be stably supported on the floor, there is no special limitation in the structure. However, in the embodiment of FIGS. 2 to 4 , two crossbars 11 parallel to each other, a lower connecting rod 12 connecting the crossbar 11 to each other, and an upper connecting rod connecting the upper end of the third rail 232 are used. can be configured.

The 3D printer body is a mechanism in which means for moving each of the x-axis, y-axis, and z-axis are combined with each other so that the end effector 30, which will be described later, can be freely moved in a three-dimensional space. Therefore, as long as it is a configuration that moves the end effector along the three axes of xyz, there is no limitation on a specific shape or type.

2 to 4, when the horizontal depth direction is the first direction, the horizontal width direction is the second direction, and the height direction is the third direction, the configuration that changes in the first direction is called the first driving unit 21 and a configuration variable in the second direction is referred to as a second driving unit 22 , and a configuration variable in the third direction is referred to as a third driving unit 23 .

Here, the first driving unit 21 includes two first rails 212 installed in parallel to each other on the upper portion of the base frame 10 in the embodiment shown in FIG. 2 , and a first installed on the side of the first rail 212 . It is composed of a driving motor 211 , a pulley 213 rotated by the first driving motor 211 , and a first arm 214 moving along the pulley 213 . Here, in the embodiment of FIG. 2 , the first arm 214 varies in the moving direction of the pulley 213 along the first rail 212 . However, in this case, the first driving unit 21 may be configured as a stepping motor, unlike the embodiment of FIG. 2 , and any other known technology that enables linear motion in the horizontal direction may be adopted.

The second driving unit 22 also has the same or similar configuration to the first driving unit 21 . The second driving part 22 is different from the first driving part 21 in the embodiment of FIGS. 2 to 4 in that the second driving part 22 is provided with screw guides 223 on the side surfaces of the two rails, respectively. Instead of the pulley 213 of the driving unit 21 , the screw guide 223 is rotated to elevate the second arm 225 .

According to the embodiment of FIGS. 2 to 4 , the third driving unit 23 includes a third rail 232 connecting the two second arms 225 , a third driving motor 231 , and a third rail ( It consists of a third arm 233 that is traversed along 232 .

The end effector 30 is installed on the third arm 233 .

The end effector 30 is installed in the third driving unit 23, as shown in FIG. 5A, a hopper 34 into which food solidification and melting are reversibly generated, and a hopper lower portion 343 are provided. A discharging means for discharging the food in a molten state at a constant speed is provided. Also, it may move along a three-dimensional path due to the first to third driving units 23 .

Here, the discharging means is installed in the form of penetrating the lower hopper 343 along the center of the hopper 34, and as shown in FIGS. 6 and 7, a spiral from a predetermined portion to a point penetrating the lower hopper 343. Since the blade is formed along the outer circumferential surface, the food can be forcibly discharged at a constant speed along the spiral blade according to the rotation of the dispensing means.

As can be seen in the prior art of FIG. 1, most of the conventional food printers output food by inserting a piston into the cylinder at a constant speed after filling the cylinder with food to be output.

However, in this case, the volume of the cylinder itself is limited, and even a small amount of solidification inside the nozzle places a large load on the piston. there is.

In order to fundamentally solve this problem, in the present invention, the discharge screw 334 formed on the outer circumferential surface of the spiral blade is applied to food such as chocolate so that the discharge can be performed continuously even in the process of continuously supplying the material, and a slight viscosity Even if a change occurs, uniform discharge may be maintained by rotation of the discharge screw 334 that requires relatively little force.

In particular, the horizontal diameter of the hopper 34 is gradually reduced from the top to the bottom, and from the point where the horizontal diameter is the minimum at the bottom of the hopper 34, the horizontal diameter is constantly formed by a predetermined length toward the bottom. A section is formed so that the food is uniformly mixed while passing through the forced transport section, thereby maintaining a constant discharge pressure.

Here, the member constituting the forced transfer section is a nozzle module 345 manufactured to be detachably coupled to the lower end of the hopper 34 as shown in FIG. The determined nozzle is installed, a plurality of nozzle modules 345 are provided as a set, and each nozzle of the plurality of nozzle modules 345 has a different diameter.

The nozzle module 345 may be detachably attached to the nozzle replacement unit 344 integrally coupled to the lower end of the hopper 34 as shown in FIG. The nozzle replacement unit 344 is formed in a form in which screws are assembled on both sides in FIG. 6 to grip the nozzle module 345 . However, if the nozzle module 345 has a structure that can be mounted, the shape of the nozzle replacement unit 344 is not necessarily limited to the shape of FIG. 6 , and any other known replaceable structure unit can be adopted.

On the other hand, the end effector is more specifically, as shown in FIG. 6 , a bracket 31 that is variably installed along the third rail 232 while the hopper 34 and a portion on which the hopper 34 can be mounted are formed. ) and a discharge motor 32 that is fixedly installed on the bracket 31 and rotates the discharge screw 334 .

Here, the bracket 31 is made of a strong elastic material, and the portion where the hopper 34 is seated on the bracket 31 and the portion where the discharge motor 32 is installed on the bracket 31 are spaced apart from each other. It has a structure in which the relative position between the hopper 34 and the discharge motor 32 is variable due to the elastic deformation of the .

The structure of the bracket 31 is more specifically, as shown in Fig. 5a, the main vertical plate 312, the motor seating plate 311 formed by bending the upper part of the main vertical plate 312 in the horizontal direction, and the main vertical plate. It consists of a hopper holder 313 installed in the horizontal direction at the lower part of the 312 .

At this time, the discharge motor 32 is installed on the motor mounting plate 311 , and the hopper 34 is mounted on the hopper holder 313 , so that a relative variable between the discharge motor 32 and the hopper 34 is possible, and the end A minute error between the discharging means and the center of the hopper 34 generated during the assembly process of the effector 30 may be corrected by the elastic force of the bracket 31 while the discharging motor 32 is driven.

In particular, since the present invention can be applied to a product that can be completed by a user directly purchasing a component kit and assembling it, a minute error may occur in the user's assembly process.

For example, the fixing position may be slightly shifted between the process of installing the discharge motor 32 on the upper part of the bracket 31 and the process of installing the discharge screw 334 . In this case, when the hopper 34 is mounted on the periphery of the discharge screw 334 , the lower end of the discharge screw 334 may slightly deviate from the center of the lower end of the hopper 34 .

At this time, when the operation starts and the material is put into the hopper 34, the discharge screw 334 temporarily stops, and then the discharge screw 334 is automatically placed in the center of the hopper 34 due to the elasticity of the bracket 31. As it settles down, smooth operation can begin. In this operation, the bracket 31 is made of a material having a certain elasticity, and the portion where the discharge motor 32 is installed and the portion where the hopper 34 is seated are bent or connected from the main vertical plate 312 to a separate portion. It is possible because the fine position correction becomes easier by being placed.

In addition, the discharge screw 334 is connected to the elastic link 332 installed side by side from the motor shaft 331 installed on the bottom surface of the discharge motor 32, even between the motor shaft 331 and the discharge screw 334, even at a slight angle. may be allowed to vary.

Here, the elastic link 332 may be a universal joint with restoring force, or may be a member having an elastic return force to make a straight line while allowing angle variation up to a certain range, such as a helical joint.

Therefore, the minute error between the discharging means and the center of the hopper 34 can be corrected uniformly even with the elastic deformation of the elastic link 332 . As shown in FIG. 7 , the correction is made in such a way that the position of the discharge motor can be adjusted in the direction of the black arrow and the position of the nozzle module 345 can also be adjusted in the direction of the black arrow.

These variations include the material and shape of the bracket, the elastic link 332 is installed between the motor shaft 331 and the discharge screw 334, and the location where the discharge motor 32 is installed is of the main vertical plate 312. The upper part is a portion bent once from the main vertical plate 312, and the seating position of the hopper 34 is the lower part of the main vertical plate 312 and the hopper holder 313 connected to the main vertical plate 312. Although not only spaced apart but also two-step variable nodes are formed, the vertical positions of each other are possible because the centers are located on the same line.

Also, as shown in FIG. 6 , a gripping sector 333 may be formed between the discharge screw 334 and the elastic link 332 . Although not clearly shown, the gripping sector 333 is a cylindrical member, with a bearing installed between the inside and the outside, so that the discharge screw 334 and the elastic link 332 can be held by hand while rotating together. Manual adjustment may be possible.

On the other hand, as shown in FIG. 6, the hopper 34 has a hopper body 342 having a constant horizontal diameter, and a hopper body 342 formed on the upper part and having a larger horizontal diameter than the hopper body 342 ( 341) and the hopper body 342 is formed in the lower portion and is composed of a hopper lower portion 343 whose horizontal diameter is gradually decreased toward the lower portion, and between the outer peripheral surface of the hopper body 342 and the outer peripheral surface of the hopper upper part 341 is a hopper A horizontal step in a form in which the horizontal diameter of the upper portion 341 is expanded is formed, and the hopper holder 313 is formed in a shape corresponding to the bottom surface of the horizontal step, so that the hopper 34 is easily mounted on the hopper holder 313 . It can be seated so as to be detachably detachable.

And although not shown, on the outer peripheral surface of the hopper 34, a hot wire may be installed over the upper portion or the center to the lower portion of the outer peripheral surface of the hopper 34. The heating wire creates a temperature condition so that the food material such as chocolate inside the hopper 34 gradually melts toward the lower hopper 343 and becomes an appropriate viscosity at the moment when it is discharged from the nozzle module 345 at the bottom of the hopper 34. .

In this case, although not shown, a small fan or similar temperature control mechanism may be installed at a spaced apart position to help solidify at an appropriate speed according to the temperature conditions of the surrounding environment at the moment the ingredients are discharged.

Meanwhile, referring to the embodiment shown in FIG. 6 , a crushing blade 335 may be installed at a predetermined point of the discharge screw. The crushing blade 335 is a blade-shaped stirring mechanism extending in the horizontal direction. Although the food material input to the hopper 34 is melted toward the lower part of the hopper 34 due to the heating wire installed on the outer peripheral surface of the hopper 34, it is initially in a solid state or a high viscosity state. Therefore, in order to promote a change that is formed into a uniform viscosity quickly in the melting process after being put into the hopper 34, a crushing blade 335 that performs a physical crushing and mixing action is installed in the present invention.

In addition, when chocolate, etc., which is a food material, is crushed by the crushing blade 335, the heated surface area is rapidly increased, so that the melting process can proceed much more quickly.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes can be made within the scope without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

10: foundation frame 11: crosspiece
12: lower connecting rod 13: upper connecting rod
14: leg 21: first driving unit
22: second driving unit 23: third driving unit
30: end effector 31: bracket
32: discharge motor 33: discharge means
34: hopper 40: stage
211: first drive motor 212: first rail
213: pulley 214: first arm
221: second drive motor 222: second rail
223: screw guide 224: screw variable link
225: second arm 231: third driving motor
232: third rail 233: third arm
311: motor seating plate 312: main vertical plate
313: hopper holder 331: motor shaft
332: elastic link 333: gripping sector
334: discharge screw 335: crushing blade
341: hopper top 342: hopper body
343: hopper lower 344: nozzle replacement unit
345: nozzle module

Claims (7)

a base frame 10 that is seated on a solid floor;
It consists of a first driving part 21, a second driving part 22, and a third driving part 23, and two of the first to third rails 232 form two horizontal axes orthogonal to each other. The other is a 3D printer body arranged so as to be a vertical axis;
Discharge for discharging the food in a molten state at a constant speed through a hopper 34 installed in the third driving unit 23 and supplied with food in which solidification and melting reversibly occur, and a lower portion of the hopper 343 an end effector (30) provided with a means and variable in a three-dimensional space due to the first to third driving units (23); and a stage 40 on which the molding material discharged from the end effector 30 is seated on the upper surface as a plate-shaped member;
In the embodiment shown in FIG. 2 , the first driving part 21 includes two first rails 212 installed in parallel to each other on the upper part of the base frame 10 , and one end of each of the two first rails 212 . Two first drive motors 211 installed one by one, two pulleys 213 installed for each of the two first drive motors 211 and rotated by the first drive motor 211, and the two first rails It is installed on each of the 212 and consists of two first arms 214 that are moved together according to the movement of the pulley 213,
The second driving unit 22 is installed in an upright position on each of the two first arms 214 , and is integrally with the first arm 214 and is variable in the horizontal direction along the two first rails 214 . Two second rails 222 that become two second rails 222, two second arms 225 installed one on each Two second driving motors 221 are installed for each 222 to drive the second arm 225 to be raised and lowered, and one second driving motor 221 is provided for each of the two second arms 225 . It is composed of two motion transmission means for converting and transmitting the rotational motion of the second arm 225 into the lifting motion of the arm 225,
The third driving unit 23 includes one third rail 232 connecting the two second arms 225 in a horizontal direction, and a third arm variable in the horizontal direction along the third rail 232 ( 233) and a third driving motor 231 for driving the third arm 233 to be variable in the horizontal direction,
The discharge means is installed in the form of penetrating the lower part along the center of the hopper (34),
A spiral blade is formed along the outer circumferential surface from a predetermined portion to a point penetrating the lower hopper 343, a heating wire is installed in the hopper 34, and two blades are extended in the horizontal direction at a predetermined portion of the discharge means. A crushing blade 335 is provided, and as the food input to the hopper 34 is crushed according to the rotation of the discharging means, the surface area is expanded and rapidly melted with the heat transferred from the hot wire, while having a uniform viscosity along the spiral blade. Prefabricated 3D food printer, characterized in that the forced discharge at a constant speed. According to claim 1,
The motion transmission means installed in the second driving unit 22 is installed in an upright form so as to be parallel to the second rail 222 while being spaced apart from the second rail 222 at regular intervals for each of the two second rails 222 . two screw guides 223 to be used, and two variable screw links 224 installed one at each lower end of the two screw guides 223 to transmit the rotational motion of the second driving motor 221 to the screw guide 223. One side of the second arm 225 is slidable up and down while being guided by the second rail 222, and the other side is screwed to the screw guide 223 according to the rotation of the screw guide 223. lift driven,
The horizontal diameter of the hopper 34 is gradually reduced from the top to the bottom, and from the point where the horizontal diameter becomes the minimum at the bottom of the hopper 34, the horizontal diameter is constantly formed by a predetermined length toward the bottom. A section is formed so that the food is uniformly mixed while passing through the forced transfer section, whereby the discharge pressure is maintained constant. 3. The method of claim 2,
The member constituting the forced transfer section is a nozzle module 345 manufactured to be detachably coupled to the lower end of the hopper 34, and a nozzle for determining the discharge thickness of the discharged food is installed at the lower end of the nozzle module 345, A plurality of nozzle modules 345 are provided as a set, and each of the nozzles of the plurality of nozzle modules 345 has a different caliber. 3. The method of claim 2,
The end effector includes a hopper 34, a bracket 31 that is variably installed along the third rail 232, and a fixed installation on the bracket 31 while a portion on which the hopper 34 can be mounted is formed. It is composed of a discharge motor 32 that rotates the spiral blade,
The bracket 31 is made of a strong elastic material, and the portion where the hopper 34 is seated on the bracket 31 and the portion where the discharge motor 32 is installed on the bracket 31 are spaced apart from each other. Prefabricated 3D food printer, characterized in that the relative position between the hopper (34) and the discharge motor (32) is variable due to the elastic deformation of the. 5. The method of claim 4,
The bracket 31 includes a main vertical plate 312 , a motor seating plate 311 in which an upper portion of the main vertical plate 312 is bent in a horizontal direction, and a lower portion of the main vertical plate 312 in the horizontal direction. It consists of a hopper holder (313) that becomes
The discharge motor 32 is installed on the motor mounting plate 311, and the hopper 34 is mounted on the hopper holder 313, so that a relative variable between the discharge motor 32 and the hopper 34 is possible, and the end A prefabricated 3D food printer, characterized in that a minute error between the discharging means and the center of the hopper (34) generated during the assembly process of the effector (30) is corrected by the elastic force of the bracket (31) while the discharging motor (32) is driven. 6. The method of claim 5,
The discharging means includes a motor shaft 331 protruding from the lower portion of the discharging motor 32 toward the center of the hopper 34, and the motor shaft 331 is connected to the lower portion in parallel to the hopper 34 and is disposed at the center of the outer circumferential surface. Accordingly, the discharge screw 334 on which the spiral blade is formed, and the elastic link 332 for coupling the motor shaft 331 and the discharge screw 334 so that the coupling angle between the motor shaft 331 and the discharge screw 334 is variable. ) by being
Prefabricated 3D food printer, characterized in that the minute error between the discharge means and the center of the hopper (34) is corrected by the elastic deformation of the elastic link (332). 6. The method of claim 5,
The hopper 34 includes a hopper body 342 having a constant horizontal diameter, a hopper upper portion 341 formed on the upper portion of the hopper body 342 and having a larger horizontal diameter than the hopper body 342, and a hopper body 342 ) is formed in the lower part and is composed of a hopper lower part 343 whose horizontal diameter is gradually reduced toward the lower part,
Between the outer peripheral surface of the hopper body 342 and the outer peripheral surface of the hopper upper part 341, a horizontal step is formed in the form of an enlarged horizontal diameter of the hopper upper part 341 side, and the hopper holder 313 corresponds to the bottom surface of the horizontal step difference By being formed in a form that becomes
The hopper (34) is a prefabricated 3D food printer, characterized in that it is easily detachably seated on the hopper holder (313).

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