KR101718613B1

KR101718613B1 - 3D printer

Info

Publication number: KR101718613B1
Application number: KR1020150093988A
Authority: KR
Inventors: 김태문; 김태환
Original assignee: 김태문; 김태환
Priority date: 2015-07-01
Filing date: 2015-07-01
Publication date: 2017-03-21
Also published as: KR20170004100A

Abstract

The present invention relates to a 3D printer in which a raw filament is melted and discharged to form a three-dimensional shape, the 3D printer comprising: a motor provided with a rotating shaft; a first body fixed to the motor and having a discharge port through which the raw filament is fed; A driving unit having a second body rotatably coupled to the first body; A first feeding roller coupled to the rotating shaft and rotated by the motor; A feeding roller which is provided on the second body so as to press the raw filament toward the first feeding roller and rotates in a direction opposite to the rotating direction of the first feeding roller, 2 feeding roller; A radiating fins coupled to the first body to discharge the heat of the first body to the outside; A first fan installed in the radiating fin to flow air to the radiating fin; And a second feeding roller which is provided between the second body and the first body so as to move air between the second body and the first body, A second fan for cooling the filament; A connection body fixed to a delivery port of the first body and having a delivery path through which the raw filament moves; And a second heat insulating material which is detachably coupled to the connection body and which melts and extrudes the raw filament conveyed by the first feeding roller and the second feeding roller and surrounds the entire outer surface, ; And a first heat insulating member disposed on a delivery path of the connection body to block the heat transferred from the nozzle unit to the connection body from being transferred to the raw filament.

Description

3D printer {3D printer}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 3D printer, and more particularly, to a 3D printer that melts raw filaments and discharges the raw filaments through a nozzle.

Generally, a 3D printer refers to a device for producing a three-dimensional printed matter based on a three-dimensional drawing.

In such a 3D printer, there is a method of heat-extruding and laminating the same thermoplastic resin made of a raw material such as ABS or PLA, a method of forming a three-dimensional shape by irradiating light on a liquid photocurable resin, And a method of forming a three-dimensional structure by extruding a liquid color ink and a cured product from a nozzle of a printer head into a powder raw material.

A nozzle device of a 3D printer to which a conventional method of thermo-extruding and laminating a thermoplastic resin is applied includes a pair of feeding rollers for feeding a thermoplastic resin and a nozzle for heating and discharging the thermoplastic resin supplied by the pair of feeding rollers Respectively.

However, there is a problem that the nozzle has a constant diameter and a temperature for heating the thermoplastic resin is constant, and thus the characteristics of different types of printed matter can not be properly expressed.

On the other hand, the technology to be a background of the present invention is disclosed in Korean Patent No. 10-1394119.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a 3D printer capable of appropriately expressing characteristics of different types of printed matter.

A 3D printer according to the present invention is a 3D printer for melting and discharging a raw filament to form a three-dimensional shape. The 3D printer includes a motor provided with a rotating shaft, a first body fixed to the motor and having a discharge port through which the raw filament is delivered, A driving unit having a second body rotatably coupled to the first body; A first feeding roller coupled to the rotating shaft and rotated by the motor; A feeding roller which is provided on the second body so as to press the raw filament toward the first feeding roller and rotates in a direction opposite to the rotating direction of the first feeding roller, 2 feeding roller; A radiating fins coupled to the first body to discharge the heat of the first body to the outside; A first fan installed in the radiating fin to flow air to the radiating fin; And a second feeding roller which is provided between the second body and the first body so as to move air between the second body and the first body, A second fan for cooling the filament; A connection body fixed to a delivery port of the first body and having a delivery path through which the raw filament moves; And a second heat insulating material which is detachably coupled to the connection body and which melts and extrudes the raw filament conveyed by the first feeding roller and the second feeding roller and surrounds the entire outer surface, ; And a first heat insulating member disposed on the connection path of the connection body to block heat transferred from the nozzle unit to the connection body to the raw filament.

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The nozzle unit may include a plurality of nozzles, each of which may be selectively coupled to the connection body, and has a discharge port through which the molten raw filament is discharged, and a heater that provides heat to the nozzles.

The nozzle unit may further include a temperature sensor for measuring the temperature of each nozzle and a controller for controlling an amount of current supplied to the heater based on the temperature measured by the temperature sensor.

The nozzle unit may further include an exchange motor coupled to the respective nozzles and connected to the control unit, and the exchange motor may selectively connect the nozzles to the connection body.

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According to the 3D printer of the present invention, it is possible to selectively mount a plurality of nozzles having different shapes or sizes of ejection openings, so that the characteristics of the printed matter can be appropriately expressed according to the type of the printed matter.

And the heat transmitted to the raw filament is cut off, thereby preventing the rigidity of the raw filament being fed from being reduced.

Further, by controlling the temperature of each nozzle, the amount and viscosity of the melted raw filament discharged to the discharge port of the nozzle can be adjusted.

1 is a perspective view of a 3D printer according to an embodiment of the present invention,
FIG. 2 is an exploded perspective view of the 3D printer of FIG. 1,
FIGS. 3 to 5 are views for explaining the operating states of the first feeding roller and the second feeding roller of the 3D printer of FIG. 1,
6 is a plan view of a dyeing portion of a 3D printer according to another embodiment of the present invention,
Fig. 7 is a cross-sectional view of each dyeing case of the dyeing portion of Fig. 6,
FIG. 8 is a perspective view of a nozzle portion of the 3D printer of FIG. 1,
FIG. 9 is a perspective view of the nozzle after removing the second heat insulator of the nozzle unit of FIG. 8,
10 is a sectional view of Fig. 9,
11 is a configuration diagram of a 3D printer according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings.

In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the understanding why the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements.

Hereinafter, a 3D printer according to an embodiment of the present invention, a filament transferring apparatus and a dyeing apparatus provided therein will be described with reference to the drawings.

FIG. 1 is a perspective view of a 3D printer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the 3D printer of FIG. 1, FIGS. 3 to 5 are views showing a first feeding roller and a second feeding roller of the 3D printer of FIG. FIG. 6 is a cross-sectional view of a dyeing portion of the 3D printer of FIG. 1, FIG. 7 is a plan view of a dyeing portion of a 3D printer according to another embodiment of the present invention, and FIG. 8 is a cross- 9 is a perspective view of the nozzle after removing the second insulating material of the nozzle unit of Fig. 8, Fig. 10 is a sectional view of Fig. 9, and Fig. 11 is a perspective view of a nozzle unit of a 3D printer according to another embodiment of the present invention , And a 3D printer.

Referring to FIGS. 1 and 2, a 3D printer 100 according to the present invention is a system for producing a three-dimensional printed matter having a three-dimensional shape based on a three-dimensional drawing. The 3D printer 100 includes a filament conveying device 200, a nozzle unit 300, . &Lt; / RTI >

The nozzle unit 300 is detachable from the filament conveyance device 200.

The filament conveying device 200 feeds a filament (hereinafter referred to as " raw filament 20 ") as a raw material of a printed matter to the nozzle unit 300.

The filament conveying device 200 can be moved in three-dimensional space by an actuator.

The raw filament 20 may be made of a material having a long length, such as a thread, and having a low melting point and a rapid solidification speed.

For example, the raw filament 20 may be made of polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), high density polyethylene (HDPE), or polycarbonate (PC).

However, the present invention is not limited thereto, and any material may be used as long as the material constituting the raw filament 20 is melted by heat and solidified when heat is removed.

The raw filament 20 may have a porous structure. Accordingly, the raw filament 20 can be rapidly dyed by the dye provided in the dyeing unit 400 described later.

The raw filament 20 may be provided in a state of being wound around a bobbin (not shown) provided in the 3D printer 100.

3 to 5, the filament conveying apparatus 200 may include a driving unit 210, a first feeding roller 220, and a second feeding roller 230.

The first feeding roller 220 and the second feeding roller 230 adjacent to the first feeding roller 220 rotate in opposite directions to transfer the raw filament 20.

In order to increase the feeding force of the filament 20, protrusions are formed on the rotating surface of the first feeding roller 220 to increase friction with the filament 20.

A guide groove 230a may be formed on the rotating surface of the second feeding roller 230 to guide the raw filament 20 in a predetermined direction.

When the first feeding roller 220 and the second feeding roller 230 adjacent to the first feeding roller 220 are rotated, the raw filament 20 is unwound from the tufts (not shown) and then transferred to the nozzle unit 300.

More specifically, the driving unit 210 includes a rotating shaft 210a, and the first feeding roller 220 may be coupled to the rotating shaft 210a to rotate.

The second feeding roller 230 is installed in the driving unit 210 so as to press the raw filament 20 toward the first feeding roller 220.

The second feeding roller 230 rotates in a direction opposite to the rotation direction of the first feeding roller 220 to transfer the raw filament 20.

The driving unit 210 may include a motor 211, a first body 212, and a second body 213.

The motor 211 is provided with the rotation shaft 210a. Therefore, when power is applied to the motor 211 from the outside, the motor 211 can rotate the rotation shaft 210a.

The first body 212 is fixed to the motor 211.

The first body 212 may have a delivery port through which the raw filament 20 is fed by the first feeding roller 220 and the second feeding roller 230.

A connecting body 215, which will be described later, may be installed at the outlet of the first body 212.

The second body 213 may be rotatably coupled to the first body 212 or the motor 211.

The second feeding roller 230 may be rotatably coupled to one side of the second body 213.

More specifically, the second body 213 may include a hinge shaft 2131, a first rotating piece 2132, and a second rotating piece 2133.

The hinge shaft 2131 is coupled to the first body 212 or the motor 211.

The first rotating piece 2132 is rotatably coupled to the hinge shaft 2131. The second feeding roller 230 is rotatably coupled to the first rotating piece 2132.

When the first rotating piece 2132 rotates with respect to the hinge shaft 2131, the second feeding roller 230 approaches the first feeding roller 220, 220).

3 to 5, when the first rotating piece 2132 rotates in the counterclockwise direction with respect to the hinge shaft 2131, the second feeding roller 230 is rotated in the counterclockwise direction about the hinge axis 2131, The first rotating piece 2132 is rotated in the clockwise direction with respect to the hinge shaft 2131 so that the second feeding roller 230 is close to the first feeding roller 220 Loses.

The second rotating piece 2133 extends to one side of the first rotating piece 2132 and can rotate the first rotating piece 2132.

An elastic body 214 is provided between the second rotating piece 2133 and the first body 212 to separate the second rotating piece 2133 and the first body 212 from each other.

More specifically, the elastic body 214 may be installed on the first body 212 to push the second rotating piece 2133 counterclockwise with respect to the hinge shaft 2131.

When the second rotating piece 2133 rotates in the counterclockwise direction with respect to the hinge shaft 2131 by the elastic body 214, the first rotating piece 2132 also rotates about the hinge axis 2131 So that the distance D between the axes of the second feeding roller 230 and the first feeding roller 220 is narrowed (see FIGS. 4 and 5).

The first feeding roller 220 and the second feeding roller 230 rotate in opposite directions to each other while pressing the raw filament 20 by the elastic body 214 so that the raw filament 20 Can be transferred.

The second body 213 may further include a pressure adjusting member 2134 protruding from one surface 2133a of the second rotating piece 2133 to press the elastic body 214. [

More specifically, the pressure regulating member 2134 may be screwed to the second rotating piece 2133.

The pressure regulating member 2134 may include a head 2134a, a screw portion 2134b, and a pressing portion 2134c.

The head 2134a is coupled to one side of the threaded portion 2134b and the pressing portion 2134c is coupled to the other side of the threaded portion 2134b.

The second rotation piece 2133 may have a through hole 2133h passing through one surface 2133a and the other surface 2133b and a threaded hole may be formed on the inner surface thereof.

The threaded portion 2134b can be screwed into the threaded hole formed in the through hole 2133h.

When the user rotates the head 2134a, the threaded portion 2134b can rotate in the threaded hole of the through hole 2133h. At this time, the pressing portion 2134c may be protruded to one surface 2133a of the second rotating piece 2133 according to the rotating direction.

For example, when the threaded portion 2134b rotates clockwise, the pressing portion 2134c moves away from the first surface 2133a of the first rotating piece 2132, and the threaded portion 2134b rotates counterclockwise The pressing portion 2134c can move so as to approach one surface 2133a of the first rotating piece 2132. [

When the pressure regulating member 2134 rotates and protrudes to one surface 2133a of the second rotating piece 2133, the pressure regulating member 2134 presses the elastic body 214, The first feeding roller 220 and the second feeding roller 230 press the raw filament 20 in a direction in which the first feeding roller 220 and the second feeding roller 230 pressurize the raw filament 20, The pressing force is further increased.

Meanwhile, the elastic body 214 may include a receiving portion 2141 and a spring 2142.

The receiving portion 2141 is fixed to the spring 2142 so that the pressure regulating member 2134 presses the spring 2142 and provides a pressing surface.

The pressing surface formed in the receiving portion 2141 may be a curved surface that is recessed inward. Accordingly, the pressing surface of the receiving portion 2141 can form a groove.

Further, the groove of the receiving portion 2141 may be formed larger than the pressing portion 2134c.

The pressing portion 2134c of the pressure regulating member 2134 is pressed against the pressing portion 2134c of the pressure regulating member 2134 by the rotation of the second rotating piece 2133, The spring 2142 can be appropriately pressurized by being received in the groove of the recess 2141.

One side of the spring 2142 is coupled to the receiving portion 2141 and the other side of the spring 2142 is coupled to the first body 212.

And a lever 2133L protruding outward from the second rotating piece 2133. [

When the user presses the lever 2133L toward the first body 212, the first rotating piece 2132 rotates counterclockwise with respect to the hinge shaft 2131 and the second feeding roller 230 rotates counterclockwise, May be spaced apart from the first feeding roller 220.

The elastic body 214 is engaged with the first surface 2133a of the second rotating piece 2133 and the second body 2133b of the first body 212. In this state, The pressure regulating member 2134 can be rotated by the other hand while being pressed by the pressure regulating member 212. [

Referring again to FIGS. 1 and 2, the filament conveying apparatus 200 may further include a radiating fin 240.

The radiating fins 240 may be coupled to the first body 212 and may discharge the heat of the first body 212 to the outside.

Further, the filament conveying device 200 may further include a first fan 250.

The first fan 250 is provided in the radiating fin 240, and the air can flow through the radiating fin 240.

The air flowing from the radiating fins 240 can remove the heat of the radiating fins 240.

Meanwhile, the filament conveyance device 200 may further include a second fan 260.

The second fan 260 may be included in the driving unit 210.

The second fan 260 moves air between the second body 213 and the first body 212 so that the second fan 260 is rotated by the first feeding roller 220 and the second feeding roller 230, The raw filament 20 can be cooled.

Referring to FIGS. 6 and 7, the filament conveying device 200 may further include the dyeing unit 400.

The dyeing unit 400 may be referred to as a " dyeing apparatus " in that the raw filament 20 is dyed.

The dyeing unit 400 is provided on one side of the driving unit 210 and can dye the raw filament 20 moved by the first feeding roller 220 and the second feeding roller 230 .

The dyeing unit 400 may include a dyeing case 410, a first door 420 provided therein, and a leakage preventing member 430.

The dyeing case 410 may be formed with an inlet 410a through which the raw filament 20 is drawn and an outlet 410b through which the raw filament 20 is drawn.

The inlet 410 may have a shape that widens toward the outside so that the raw filament 20 can be easily inserted.

A dye receiving space 410s may be formed in the dyeing case 410 to receive the dye for dyeing the raw filament 20, which is connected to the inlet 410a and the outlet 410b.

The first door 420 is provided at the inlet 410a to selectively shield the inlet 410a. The first door 420 may prevent foreign matter from moving to the dye accommodating space 410s through the inlet 410a.

The leakage preventing member 430 may be made of an elastic material, and may be provided at the outlet 410b to selectively shield the outlet 410b.

The leakage preventing member 430 can prevent the dye in the dye containing space 410s from flowing out to the outside through the outlet 410b.

The dyeing case 410 may further include a capacity checking unit 440 for checking the capacity of the dye in the dye receiving space 410s.

The capacity checking unit 440 is installed in the dye case 410 and may be made of a transparent material so as to be observable from the outside.

Therefore, the user can visually confirm the capacity of the dye contained in the dye accommodation space 410s.

Meanwhile, a plurality of dyeing cases 410 may be provided, and dyes of different colors may be accommodated in the respective dyeing cases 410.

The dyeing unit 400 may further include a transfer module 450.

The transfer module 450 may move the plurality of dye cases 410 so that the raw filament 20 can selectively pass through any one of the dye cases 410.

The transfer module 450 includes a rotation source 451 and a rotation piece 452.

The rotation piece 452 is connected to the rotation source 451 and can be rotated by the rotation source 451.

Each of the dye cases 410 may be installed at an end of the rotating piece 452.

That is, each of the dye cases 410 may be spaced apart from the rotation source 451 at equal intervals.

The feeding module 450 may further include a cutting unit 453 disposed on the inlet 410a of each dye case 410 to cut the raw filament 20. [

The cutting portion 453 cuts the raw filament 20 so that when the raw filament 20 is required to be dyed in a different color, The raw filament 20 inserted into the inlet 410a can be cut.

When the raw filament 20 is cut by the cutting portion 453, the rotation source 451 is rotated by the rotation so that the raw filament 20 can be inserted into the inlet 410a of the other dye case 4102 So that the piece 452 can be rotated.

The nozzle unit 300 is connected to the driving unit 210 and melts and extrudes the raw filament 20 transferred by the first feeding roller 220 and the second feeding roller 230.

5 and 8 to 11, the first body 212 fixed to the motor 211 is formed with a discharge port through which the raw filament 20 is fed.

The 3D printer 100 may further include a connection body 215.

The connection body 215 is fixed to a delivery port of the first body 212 and a delivery path 212a through which the raw filament 20 moves is formed inside the connection body 215 (see FIG. 5).

The connection body 215 may include a fixing portion 2151 and a coupling portion 2152. [

The fixing portion 2151 is fixed to the first body 212 at a delivery port. The engaging portion 2152 is connected to the fixing portion 2151, and a screw thread may be formed on the outer periphery.

The nozzle unit 300 may be selectively coupled to the connection body 215.

The connection body 215 may further include a first insulation member 2153.

The first heat insulating material 2153 is provided in the feed path 212a to block heat transfer from the connecting body 215 to the raw filament 20.

More specifically, the first heat insulating material 2153 can prevent the heat of the fixing portion 2151 and the coupling portion 2152 of the connection body 215 from being transferred to the raw filament 20.

Accordingly, the raw filament 20 can be prevented from being reduced in strength by heat. Therefore, the raw filament 20 can be smoothly transferred to the nozzle unit 300.

The nozzle unit 300 may include a nozzle 310 and a heater 320.

A plurality of nozzles 310 may be provided and selectively coupled to the connection body 215. A discharge port 310b through which the molten raw filament 20 is discharged may be formed in the nozzle 310

The discharge ports 310b of the plurality of nozzles 310 may have different sizes and shapes.

For example, the discharge ports 310b of the respective nozzles 310 may be circular and may have different diameters.

When the size and shape of the ejection openings 310b of the respective nozzles 310 are different from each other, the characteristics of the printed matter can be appropriately expressed according to the type of the printed matter.

Each of the nozzles 310 may have an insertion portion 310a formed with a threaded portion for screwing the coupling portion 2152 therein.

However, the coupling between the nozzle 310 and the coupling portion 2152 is not limited to the screw coupling as described above, and any coupling may be used as far as it is a detachable coupling.

Each of the nozzles 310 may have a discharge port 310b connected to the insertion portion 310a.

The heat generator 320 is provided in each of the nozzles 310 to provide heat to the respective nozzles 310.

Accordingly, the raw filament 20 may be melted due to heat generated from the heater 320, and then discharged to the outside through the discharge port 310b.

The nozzle unit 300 may further include a temperature sensor 330 and a control unit 340.

The temperature sensor 330 measures the temperature of each of the nozzles 310 and the controller 340 controls the amount of current supplied to the heater 320 based on the temperature measured by the temperature sensor 330 The temperature of each of the nozzles 310 can be controlled.

The controller 340 controls the temperature of each of the nozzles 310 to adjust the amount and viscosity of the molten raw filament 20 discharged to the discharge port 310b of each nozzle 310. [

The nozzle unit 300 may further include a second heat insulator 350.

The second heat insulating material 350 is provided on an outer surface of each of the nozzles 310 to prevent heat from being emitted from the respective nozzles 310 to the outside.

Therefore, the second heat insulator 350 can increase the heat efficiency of the nozzles 310.

The nozzle unit 300 may further include an exchange motor 360.

The exchange motor 360 is connected to the controller 340. The nozzles 310 may be coupled to the exchange motor 360.

The exchange motor 360 may selectively couple the nozzles 310 to the connection body 215.

The operation of the exchange motor 360 is controlled by the control unit 340.

Accordingly, the controller 340 controls the operation of the exchange motor 360 to selectively couple the nozzles 310 to the connection body 215.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: 3D printer
200: filament conveying device
210:
211: Motor
212: first body
213: Second body
220: first feeding roller
230: second feeding roller
300:
310: Nozzle
320: Heater
330: Temperature sensor
340:
350: Secondary insulation
360: Replacement motor

Claims

In a 3D printer which melts and discharges raw filaments to make a three-dimensional shape,
A driving unit fixed to the motor and having a first body having a discharge port through which the raw filament is fed and a second body rotatably coupled to the first body;
A first feeding roller coupled to the rotating shaft and rotated by the motor;
A feeding roller which is provided on the second body so as to press the raw filament toward the first feeding roller and rotates in a direction opposite to the rotating direction of the first feeding roller, 2 feeding roller;
A radiating fins coupled to the first body to discharge the heat of the first body to the outside;
A first fan installed in the radiating fin to flow air to the radiating fin;
And a second feeding roller which is provided between the second body and the first body so as to move air between the second body and the first body, A second fan for cooling the filament;
A connection body fixed to a delivery port of the first body and having a delivery path through which the raw filament moves;
And a second heat insulating material which is detachably coupled to the connection body and which melts and extrudes the raw filament conveyed by the first feeding roller and the second feeding roller and surrounds the entire outer surface, ; And
And a first heat insulator provided on a delivery path of the connection body to block transmission of heat transferred from the nozzle unit to the connection body to the raw filament.

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The method according to claim 1,
In the nozzle unit,
A plurality of nozzles which can be selectively coupled to the connection body and have discharge ports through which the molten filaments are discharged,
And a heater for providing heat to each of the nozzles.

The method of claim 5,
In the nozzle unit,
A temperature sensor for measuring the temperature of each nozzle;
And a controller for controlling the amount of current supplied to the heat generator based on the temperature measured by the temperature sensor.

The method of claim 6,
In the nozzle unit,
Further comprising an exchange motor coupled to each of the nozzles and connected to the control unit,
Wherein the exchange motor selectively couples each of the nozzles to the connection body.

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