CN108327252A - Screw extrusion system and 3D printer comprising the system - Google Patents
Screw extrusion system and 3D printer comprising the system Download PDFInfo
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- CN108327252A CN108327252A CN201810321090.2A CN201810321090A CN108327252A CN 108327252 A CN108327252 A CN 108327252A CN 201810321090 A CN201810321090 A CN 201810321090A CN 108327252 A CN108327252 A CN 108327252A
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- Prior art keywords
- extrusion system
- machine barrel
- screw
- screw extrusion
- screw rod
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- 238000001125 extrusion Methods 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 47
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 238000010146 3D printing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 3
- 239000004626 polylactic acid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910002065 alloy metal Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
This application provides a kind of screw extrusion system and include the 3D printer of the system.The extrusion system includes machine barrel, be removably mounted on the machine barrel lower end nozzle, the screw rod that is rotatably installed in the machine barrel and the one or more heating devices arranged around the outer wall of the machine barrel, and cooling device, outer wall setting and the neighbouring nozzle of the cooling device around the machine barrel.Using the extrusion system, very flexible mode of heating can be realized to the material entered in machine barrel, especially material can be heated to very high temperature in the middle part of machine barrel and the strand of material is allowed fully to open, then it is quickly cooled to predetermined temperature again at neighbouring nozzle, the viscosity for being suitble to extrusion molding to allow material to have.
Description
Technical field
The present invention relates to increasing material manufacturing (3D printing) material processing fields, and system is squeezed out more particularly, to a kind of screw
System and the 3D printer comprising the system.
Background technology
In recent years, increasing material manufacturing especially 3D printing technique obtains significant progress.A kind of common technology of 3D printing
It is fused glass pellet (FDM) technology, which is especially suitable for high molecular material, and (such as ABS, polylactic acid PLA gather in oneself
Ester PCL etc.).In the 3D printing equipment using the technology, material extrusion system has consequence, directly affects product
Quality and performance.
Screw extrusion system is to use more universal one kind at present, generally includes mechanical part and temperature-controlled portion.Machine
Tool part generally comprises machine barrel, the nozzle for being fixed on machine barrel lower end, the screw rod being arranged in machine barrel and is fixed on machine barrel upper end
Driving motor.Temperature-controlled portion generally comprises 1 to 2 heating device being arranged around machine barrel outer wall and corresponding temperature sensing dress
It sets.In such extrusion system, the material entered in machine barrel cannot be heated to very high temperature, because otherwise reaching nozzle
The material at place can be too dilute, can not be molded.However, for high score material, thermal history is very big on the influence of its performance, in a variety of situations
In, it needs for high molecular material to be heated to very high temperature, opens the strand being intertwined, ensure the homogenieity squeezed out.
Invention content
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, one kind is provided and can guarantee that material molecule chain is heating
Fully opening in the process simultaneously again will not can not molding screw extrusion system because material at nozzle is excessively dilute.
According to the one side of the application, a kind of screw extrusion system is provided, which includes machine barrel, removably
Mounted on the nozzle of the lower end of the machine barrel, the screw rod that is rotatably installed in the machine barrel and around the outer of the machine barrel
One or more heating devices of wall arrangement.The extrusion system further includes cooling device, and the cooling device surrounds the machine
The outer wall of cylinder is arranged and the neighbouring nozzle.
It, can be by material in the middle part of machine barrel using the extrusion system due to being provided with cooling device near nozzle
It is heated to very high temperature and the strand of material is allowed fully to open, be then again quickly cooled to material at neighbouring nozzle pre-
Constant temperature degree, the viscosity for being suitble to extrusion molding to allow material to have, both having fully ensured that the homogeneity squeezed out in turn ensures can be at
Type.
According to some embodiments, screw rod further includes the axis knot being arranged at neighbouring the upper end and extends in the axis side of forging
Threaded portion, the outer diameter of axis knot are more than the outer diameter of threaded portion, and machine barrel includes the cylinder head equipped with charging aperture and screw rod mounting hole, axis
The lower surface of knot is resisted against on the upper surface of cylinder head, and extrusion system further includes the screw rod tabletting for the upper surface for pressing axis knot.
In the screw extrusion system of the prior art, the axially position of screw rod and the stability of rotation ensure by bearing, and adopt
There are shortcomings with bearing, such as：Due to needing that the other mechanisms for ensureing bearing normal operation, the volume of extrusion system is arranged
It is usually larger；Screw rod is typically all that metal material is made, and heat passes to bearing along screw rod when heating, bearing life can be made to drop
It is low, it may be necessary to regularly replace, and bearing block machining accuracy is higher, this can undoubtedly increase the totle drilling cost of 3D printing equipment.On
It states novel design to make it possible in the case that isostructural without using bearing, bearing block, easily realizes that the axial direction of screw rod is fixed
Position and the stability for ensureing its rotation, moreover, Screw Extrusion system/3D printing equipment size using the design is relatively small,
Advantage of lower cost.
According to some embodiments, cylinder head further includes the boss or groove around the setting of screw rod mounting hole, boss or groove
Upper surface is vertical with the axis of screw rod mounting hole, and the lower surface of axis knot is resisted against on the upper surface of boss or groove.Boss is recessed
The upper surface of slot will usually be finished, and very high with the verticality of screw rod mounting hole, can be better ensured that in this way and axis
The cooperation of knot.In addition, the size of axis knot and boss/groove is all smaller, finishing cost is relatively low.
According to some embodiments, one or more of heating devices and cooling device have separate temperature control system
System.In this way the different piece (and then to material therein) of machine barrel can heat/cool down, realize very flexible heating
Mode realizes the Temperature Distribution of optimization according to the property of material processed, final to obtain performance more preferably printed product.
According to some embodiments, temperature control system includes the temperature measurer and thermometric being arranged at heating device or cooling device
Instrument connection temp controlled meter, the break-make for the thermorelay that temp controlled meter is provided according to temperature measurer, so control heater circuit or
The energized state of cooling circuit.Temperature measurer can select thermocouple easy to use, need to only be pasted (such as utilizing adhesive tape)
At the position for needing thermometric.
According to some embodiments, screw flight part includes feeding section, compression section and metering section, institute successively from top to bottom
One or more heating devices are stated to be separately positioned at the position being generally corresponding to feeding section, compression section and metering section.In this way may be used
With according to the characteristics of each section and rational temperature is arranged in demand, to realizing optimal Temperature Distribution.
According to some embodiments, one or more of heating devices are spaced first heater, second adds
Thermal and third heating device, they are separately positioned at the position being generally corresponding to feeding section, compression section and metering section.It answers
It should be appreciated that the quantity of heating device and its position are exemplary only in these embodiments, those skilled in the art can be with
It is adjusted according to specific demand, but 3 or 3 or more heating devices are more satisfactory, because can obtain so more
Add flexible mode of heating.
According to some embodiments, cooling device includes by good heat conducting material (such as copper, aluminium and its alloy metal thermal conductive material
Or the nonmetallic heat conductive material such as graphene etc.) made of disk-like structure.Preferably, a diameter of 5 millimeters to 100 of disk-like structure
Millimeter, more preferably 20 millimeters to 80 millimeters.When needing cooling, air blast cooling is carried out to disk-like structure with hair-dryer, due to
Its heat dissipation area is larger, thermal conductivity is higher, therefore can within a short period of time be cooled to the material near nozzle in machine barrel pre-
Constant temperature degree.According to other embodiments, cooling device includes the internal coolant jacket with cooling medium channel.In use, such as
The cooling medium stream of water crosses channel, and heat is taken away, and is subsequently recycled at refrigeration pump or radiator and freezes, returns coolant jacket,
So move in circles.It should be understood that above two kinds of embodiments for exemplarily only listing cooling device, this field skill
It can be modified or is replaced with other suitable conventional implementations by art personnel, these should all fall into the present invention's
Protection domain.
According to some embodiments, the outer diameter of screw flight part is 6 to 15 millimeters.It is highly preferred that the outer diameter is 7 to 12
Millimeter.The size of the nozzle screw rod of screw increasing material manufacturing at present is larger, and diameter is generally at 12 millimeters or more.Screw diameter mistake
Conference causes the space between screw rod and machine barrel larger, and material filling leakiness, gap are big, uneven so as to cause discharging, and influence
Forming Quality.In addition, screw size is bigger, required torque is bigger when making its rotation, and nozzle overall dimensions just must be corresponding
Ground increases, weight correspondingly increases, this can undoubtedly influence the stability of nozzle operating and then influence the stabilization of material extrusion
Property.In addition, when nozzle diameter is less than 150 microns, screw rod slightly makes extruded velocity too fast excessively, can not normal print.In above-mentioned reality
It applies in example, screw diameter is reduced, this can be such that extruded velocity is controlled in a zone of reasonableness, and existing enough speed is protected
Printing effect is demonstrate,proved, and will not cause excessive velocities that molding is made to fail.
According to some embodiments, nozzle includes spray material port, a diameter of 0.05 millimeter to 0.5 millimeter of spray material port, more preferably
Ground, this diameter of 0.1 millimeter to 0.4 millimeter.The diameter of spray material port is smaller, and the material silk of ejection is thinner, and formed precision is got over
The surface of height, obtained printed product is more smooth.Practice have shown that it is smart to print having for high quality using above-mentioned nozzle
The product of fine texture.
According to the another aspect of the application, a kind of three-dimensional (3D) printer is provided, including screw as described above squeezes
Go out system.
In this application, term " upper end " refers to close to one end of driving motor, and " lower end " refers to close to one end of nozzle.
In this application, term " neighbouring certain component " refers to having a rational small distance from certain component, the distance and this
The size of component and its associated components is related, and those skilled in the art should be able to determine according to actual conditions.
In this application, term " feeding section ", " compression section " and " metering section " is generally understood with those skilled in the art
Meaning, divide generally according to the groove depth of screw thread on screw rod, in general, feeding section groove depth is maximum and is arranged at equivalent gullet depth, measure
Section groove depth is minimum and is arranged at equivalent gullet depth, and the groove depth of compression section fades to minimum groove depth by maximum groove depth, but it is to be understood that,
Be mainly used for realize " charging ", " compression ", " metering " function the thread segment divided by other means also covered by above-mentioned term
Inside.
Description of the drawings
The present invention is described in further detail below with reference to accompanying drawings.It will be readily appreciated by those skilled in the art that
These attached drawings are intended solely for illustrative purposes, and are not intended to and are construed as limiting to protection scope of the present invention.It is identical attached in figure
Icon note indicates same or analogous component.For illustrative purposes, these figures and non-fully drawn to scale.
Fig. 1 is the schematic explosive view according to the screw extrusion system of the application one embodiment.
Fig. 2 is the schematic perspective view after extrusion system shown in Fig. 1 assembles.
Fig. 3 is the longitudinal sectional drawing of extrusion system shown in Fig. 2.
Fig. 4 is the first embodiment for the cooling device of the application extrusion system.
Fig. 5 is the second embodiment for the cooling device of the application extrusion system.
Specific implementation mode
Fig. 1 to Fig. 3 schematically shows the screw extrusion system 100 according to the application one embodiment.In the reality
It applies in example, screw extrusion system 100 is used to be mounted on the three-dimensional printer using fused glass pellet (FDM) technology, real
The 3 D-printing of existing heat-fusible materials (especially thermoplastic macromolecule material).It should be apparent that the extrusion system also may be used
For using on the three-dimensional printer of other technologies (such as preparation technology in low temperature).
Extrusion system 100 include machine barrel 8, be removably mounted on machine barrel 8 lower end nozzle 9, be rotatably installed in
Three heating devices 11,12,13 of screw rod 7 in machine barrel 8 and the outer wall arrangement around machine barrel 8.Extrusion system 100 further includes
Around the outer wall setting of machine barrel 8 and the cooling device 10 of neighbouring nozzle 9.Due to the presence of cooling device, using the extrusion system
It unites when carrying out 3 D-printing, can material be heated to very high temperature in the middle part of machine barrel and the strand of material is allowed fully to beat
It opens, material is then quickly cooled to predetermined temperature again at neighbouring nozzle, be suitble to the viscous of extrusion molding to allow material to have
Degree has both fully ensured that the homogeneity squeezed out in turn ensures formability in this way.Such as the fusing point of polylactic acid (PCL) only has 60-
70 DEG C, using the above-mentioned extrusion system for being equipped with cooling device, so that it may among machine barrel position PCL is heated to about 220 DEG C,
Then about 80 DEG C are quickly cooled to reaching at nozzle soon.
As shown in Figure 1, the unthreaded sections of screw rod 7 including upper end and the threaded portion extended below unthreaded sections.
In this embodiment, threaded portion has unified outer diameter, it is preferable that the outer diameter is 6 to 15 millimeters, more preferably 7 to 12 millis
Rice, in one example, the outer diameter are 8 millimeters.But it is to be understood that threaded portion can not also have unified outer diameter,
But for example in up big and down small taper.In this embodiment, threaded portion is divided into charging by screw thread groove depth from top to bottom
Section 76 (in some instances, length is 24 millimeters to 60 millimeters), compression section 78 (in some instances, length be 24 millimeters extremely
40 millimeters) and metering section 79 (in some instances, length is 24 millimeters to 60 millimeters), feeding section groove depth is maximum and at equivalent gullet depth
Setting, metering section groove depth is minimum and is arranged at equivalent gullet depth, and the groove depth of compression section fades to minimum groove depth by maximum groove depth；Spiral shell rib is horizontal
Rectangular cross-section or trapezoidal or other suitable shapes are that fillet is excessively connect with screw root；The lower end of screw rod is at circular cone
Setting, mutually agrees with the shape of nozzle interior.In this embodiment, the unthreaded sections of screw rod 7 have one section slightly than threaded portion
Thick structure (hereinafter referred to as axis knot 74), axis knot 74 are then one section of light in the top of axis knot 74 close to the top of threaded portion
Axis 72.
Still as shown in Figure 1, machine barrel 8 includes cylinder head 82 and stack shell 84, a through-hole for placing screw rod 7 runs through entire machine
Cylinder (hereinafter referred to as this through-hole is screw rod mounting hole 822).In this embodiment, cylinder head 82 is one with bevelled cuboid
Shape (but can also have other suitable shapes), inclined-plane is equipped with charging aperture 824 and several threaded holes are (attached for adding other
Belong to structure), charging aperture 824 connects perpendicular to inclined-plane and screw rod mounting hole；Stack shell 84 is cylindrical (but can also have other
Suitable shape), lower end is equipped with the threaded portion for installing nozzle.The upper surface of cylinder head 82 is set around screw rod mounting hole 822
There are one boss 822, it is preferable that is finished to the upper surface of boss 822, so that it is had with screw rod mounting hole 822 high
Verticality.According to one embodiment modification, which may alternatively be the annular groove being arranged around screw rod mounting hole 822.
In the embodiment shown in fig. 1, extrusion system 100 further includes thermal insulation board 6, screw rod tabletting 5, connecting plate 4, motor cabinet
2, driving motor 1 and shaft coupling 3.Thermal insulation board 6 is for completely cutting off motor 1 and machine barrel 8, and heat conducts when preventing machine barrel from being heated
Motor overheating is set to damage to motor.In this embodiment, thermal insulation board 6 is made of dystectic high molecular polymer, is one
Square plate with through-hole, but it is to be understood that, it can also be made of other heat-insulating materials, can have any other conjunction
Suitable shape and construction.Screw rod tabletting 5 is used for standing screw 7, is a porose sheet metal in centre in this embodiment, should
The outer diameter of the aperture ratio screw shaft knot 74 in hole is small.Connecting plate 4 is metal material system in this embodiment for carrying motor cabinet 2
At thin plate with threaded hole.Driving motor 1 is mounted on motor cabinet 2, and output end is connected to the light of screw rod 7 by shaft coupling 3
Axis 72, to which driving screw rod 7 rotates when in use, and then by the material of heating melting from the spray material port extruder barrel of nozzle.
If Fig. 2 and Fig. 3 are best shown, after extrusion system 100 assembles, screw rod 7 is mounted in machine barrel 8, axis knot
74 lower surface is resisted against on the upper surface of boss 822 of cylinder head 82, can prevent screw rod from sliding axially downward in this way.Separately
Outside, the upper surface of axis knot 74 is pushed down in screw rod tabletting 5, and is connected with barrel 8 across thermal insulation board 6 by fastener (such as bolt),
It ensure that the axially position of screw rod 7.Above structure to be not necessarily to as using the components such as bearing, bearing block in the prior art,
It just can be easily implemented the axially position of screw rod and ensure the stability of its rotation, moreover, using the Screw Extrusion of the structure
System/3D printing equipment size is relatively small, and cost is relatively low.
As best shown in Figure 3, first heater 13, secondary heating mechanism 12 and third heating device 11 are mutual
Every the outer wall around stack shell 84 is separately positioned at the position being generally corresponding to the feeding section of screw rod, compression section and metering section, cold
But device 10 is then arranged in the bottom of stack shell, closes at nozzle 9.These heating devices and cooling device respectively have independent
Temperature control system to the different piece (and then to material therein) of machine barrel can heat/cool down in this way, realize very flexible
Mode of heating, the Temperature Distribution of optimization is realized according to the property of material processed, it is final to obtain performance more preferably printed product.
In this embodiment, temperature control system include the thermocouple 14,15,16 and 17 for being bonded in heating device or cooling device outer surface,
The temp controlled meter (not shown) being connect with thermocouple, the break-make for the thermorelay that temp controlled meter is provided according to thermocouple, in turn
Control the energized state of heater circuit or cooling circuit.Above-mentioned thermocouple can be K, WRe, E, S, T, J, N, PT100, CU50,
PT100 or other kinds of thermocouples.
Fig. 4 to Fig. 5 shows two exemplary embodiments of cooling device.In the example depicted in fig. 4, cooling device is
Coolant jacket, including main body 102, be arranged inside main body 102 cooling medium channel 104, be generally disposed at the logical of main body center
Hole 106, the through-hole is for receiving stack shell 84.In use, the cooling medium stream of such as water crosses channel, heat is taken away, is then followed
Ring freezes at refrigeration pump or radiator, returns coolant jacket, so moves in circles.In the example depicted in fig. 5, cooling device
To be made of good heat conducting material (the nonmetallic heat conductive material of such as copper, aluminium and its alloy metal thermal conductive material or such as graphene)
Disk-like structure 10 ' comprising main body 102 ', be generally disposed at main body center carry through-hole 106 ' sleeve 103 ', the through-hole
106 ' for receiving stack shell 84.Preferably, a diameter of 5 millimeters to 100 millimeters of main body 102 ', more preferably 20 millimeters to 80
Millimeter.When needing cooling, air blast cooling is carried out to disk-like structure with hair-dryer, since its heat dissipation area is larger, thermal conductivity is higher,
Therefore can the material near nozzle in machine barrel be cooled to predetermined temperature within a short period of time.It should be understood that this field
Technical staff is also contemplated that other cooling devices that can be used for above-mentioned extrusion system.
The application further relates to the 3D printer for being equipped with above-mentioned screw extrusion system.In use, material passes through charging aperture
824 are added in machine barrel 8, and motor 1 drives screw rod 7 to rotate, and then drive material downlink, receive in the different sections of machine barrel different
Heating/cooling (temperature that each section can be arranged according to the property of material) of temperature, is finally sprayed onto into from the spray material port of nozzle 9
On type platform, successively printing is until form final products.
Attached drawing and foregoing description describe the present invention non-limiting specific embodiment.It is simple in order to instruct inventive principle
Change or be omitted some conventional aspects.Those skilled in the art should understand that the modification from these embodiments is fallen the present invention's
In range.Those skilled in the art should understand that features described above can be combined in a variety of ways to form multiple changes of the present invention
Type.The invention is not limited in above-mentioned specific embodiments as a result, and are only limited by the claims and their equivalents.
Claims (13)
1. a kind of screw extrusion system, including machine barrel, be removably mounted on the machine barrel lower end nozzle, rotatably
One or more heating devices of screw rod in the machine barrel and the outer wall arrangement around the machine barrel, feature exist
In the extrusion system further includes cooling device, and the cooling device is arranged around the outer wall of the machine barrel and adjacent to described
Nozzle.
2. screw extrusion system as described in claim 1, wherein the screw rod is included in the axis being arranged at neighbouring the upper end
It ties and in the threaded portion that the axis side of forging extends, the outer diameter of the axis knot is more than the outer diameter of the threaded portion, described
Machine barrel includes the cylinder head equipped with charging aperture and screw rod mounting hole, and the lower surface of the axis knot is resisted against the upper surface of the cylinder head
On, the extrusion system further includes the screw rod tabletting for the upper surface for pressing the axis knot.
3. screw extrusion system as claimed in claim 2, wherein the cylinder head further includes being set around the screw rod mounting hole
The upper surface of the boss or groove set, the boss or groove is vertical with the axis of screw rod mounting hole, under the axis knot
Surface is resisted against on the upper surface of the boss or groove.
4. screw extrusion system as claimed any one in claims 1 to 3, wherein one or more of heating devices
And the cooling device has separate temperature control system.
5. screw extrusion system as claimed in claim 4, wherein the temperature control system includes being arranged in the heating device
Or temperature measurer at the cooling device, the temp controlled meter that is connect with the temperature measurer, the temp controlled meter are provided according to temperature measurer
The break-make of thermorelay, and then control the energized state of heater circuit or cooling circuit.
6. screw extrusion system as claimed any one in claims 1 to 3, wherein the screw flight part is from upper
It includes feeding section, compression section and metering section successively to arrive down, and one or more of heating devices are separately positioned on and the charging
At the position that section, the compression section and the metering section are generally corresponding to.
7. screw extrusion system as claimed in claim 6, wherein one or more of heating devices are spaced
First heater, secondary heating mechanism and third heating device, they are separately positioned on and the feeding section, the compression section
At the position being generally corresponding to the metering section.
8. screw extrusion system as claimed any one in claims 1 to 3, wherein the cooling device includes being led by good
Disk-like structure made of hot material.
9. screw extrusion system as claimed in claim 8, wherein a diameter of 5 millimeters of the disk-like structure to 100 millis
Rice.
10. screw extrusion system as claimed any one in claims 1 to 3, wherein the cooling device includes internal tool
There is the coolant jacket of cooling medium channel.
11. screw extrusion system as claimed any one in claims 1 to 3, wherein outside the screw flight part
Diameter is 6 to 15 millimeters.
12. screw extrusion system as claimed any one in claims 1 to 3, wherein the nozzle includes spray material port, institute
State spray material port a diameter of 0.05 millimeter to 0.5 millimeter.
13. a kind of 3D printer, including screw extrusion system as described in any one of the preceding claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321090.2A CN108327252A (en) | 2018-04-11 | 2018-04-11 | Screw extrusion system and 3D printer comprising the system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810321090.2A CN108327252A (en) | 2018-04-11 | 2018-04-11 | Screw extrusion system and 3D printer comprising the system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108327252A true CN108327252A (en) | 2018-07-27 |
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ID=62932854
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|---|---|---|---|
| CN201810321090.2A Pending CN108327252A (en) | 2018-04-11 | 2018-04-11 | Screw extrusion system and 3D printer comprising the system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112440466A (en) * | 2019-08-15 | 2021-03-05 | 中国科学院化学研究所 | Rapid forming device for ultrahigh molecular weight polymer |
| CN113249220A (en) * | 2021-05-19 | 2021-08-13 | 哈尔滨工业大学（深圳） | Working platform for extruding and receiving strip/strip-shaped biological materials |
| CN114126841A (en) * | 2019-07-26 | 2022-03-01 | 通用电气公司 | Modular extrusion system for forming articles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112440466A (en) * | 2019-08-15 | 2021-03-05 | 中国科学院化学研究所 | Rapid forming device for ultrahigh molecular weight polymer |
| CN113249220A (en) * | 2021-05-19 | 2021-08-13 | 哈尔滨工业大学（深圳） | Working platform for extruding and receiving strip/strip-shaped biological materials |
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