CN110181807A - A kind of FDM extrusion device based on single screw melt pump - Google Patents
A kind of FDM extrusion device based on single screw melt pump Download PDFInfo
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- CN110181807A CN110181807A CN201910401995.5A CN201910401995A CN110181807A CN 110181807 A CN110181807 A CN 110181807A CN 201910401995 A CN201910401995 A CN 201910401995A CN 110181807 A CN110181807 A CN 110181807A
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- melt
- melt pump
- screw extruder
- motor
- charging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/314—Preparation
-
- 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
- B33Y10/00—Processes of additive manufacturing
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of FDM extrusion device based on single screw melt pump, comprising: controller；Frequency converter；Screw extruder；Solution pressure sensor, for detecting the pressure of melt in feed pipe；Melt Pump, for the melt extrusion after melting screw extruder；The feed inlet of screw extruder is connected to feed hopper, and the discharge port of screw extruder is connected to by feed pipe with the feed inlet of Melt Pump, and the discharge port of Melt Pump is connected to discharge nozzle；Melt force sensor, pressure of the melt force sensor for melt in real-time detection feed pipe are installed on feed pipe；Melt force sensor signal output end and pressure transmitter signal input part communicate to connect, and pressure transmitter signal output end and controller signals end communicate to connect, and another signal end of controller is also communicated to connect with the signal input part of frequency converter；Being conductively connected into electric end and external power supply of frequency converter, current output terminal are conductively connected with extruder motor, melt pump motor into electric end respectively.
Description
Technical field
The present invention relates to FDM rapid shaping techniques, squeeze out dress more particularly to a kind of FDM based on single screw melt pump
It sets.
Background technique
The novel rapid shaping skill that FDM rapid shaping technique grows up as the middle and later periods the 80's of 20th century
Art mainly carries out rapid shaping as consumptive material using plastic wire, and having system structure, cost is relatively low, and equipment volume is small, work
The advantages that pollution-free, is a kind of ideal rapid prototyping system that can be used in office environment, but so there is molding at present
Speed is slow, the few disadvantage of consumptive material type.
In order to preferably apply this novel forming technique overcome there are the shortcomings that, inventor proposes that one kind can be direct
Use thermoplastic granulates screw extruder and Melt Pump are together in series as the mode of FDM extrusion device.But due to
There are pressure and flowed fluctuation, these fluctuations will lead to Melt Pump and squeeze out stability decline for screw extruder conveying.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide one kind to be based on single screw rod
The FDM extrusion device of Melt Pump may be implemented higher by screw extruder and melt series connection of pumps, and by pressure controlling
The steady extruding of extrusion efficiency and Melt Pump.
To achieve the above object, the present invention provides a kind of FDM extrusion device based on single screw melt pump, comprising:
Controller, for controlling the electric energy frequency of frequency converter output；
Frequency converter, for exporting the electric energy of different frequency according to the signal of controller；
Screw extruder is used for heating of plastic particle, while squeezing out after being melted；
Solution pressure sensor, for detecting the pressure of melt in feed pipe；
Melt Pump, for the melt extrusion after melting screw extruder；
The feed inlet of the screw extruder is connected to feed hopper, and the discharge port of screw extruder is melted by feed pipe with described
The feed inlet connection of body pump, the discharge port of Melt Pump are connected to discharge nozzle；
Melt force sensor is installed, melt force sensor is for melt in real-time detection feed pipe on the feed pipe
Pressure；
The melt force sensor signal output end and pressure transmitter signal input part communicates to connect, pressure transmitter letter
Number output end and controller signals end communicate to connect, another signal end of controller also with the signal input part communication link of frequency converter
It connects；
Being conductively connected into electric end and external power supply of frequency converter, current output terminal respectively with extruder motor, melt pump motor into electric end
It is conductively connected.
As a further improvement of the present invention, the screw extruder further includes extruder motor, squeezes out machine gearbox, institute
It states the output shaft of extruder motor and squeezes out the input axis connection of machine gearbox, the output shaft of the extrusion machine gearbox passes through company
The driving axis connection of spindle and screw extruder；
The Melt Pump, further includes melt pump motor, Melt Pump gearbox, and the output shaft and Melt Pump of the melt pump motor become
Input shaft assembly, the transmission of fast case, the output shaft of Melt Pump gearbox and drive shaft assembly, the transmission of Melt Pump.
As a further improvement of the present invention, screw extruder, Melt Pump pass through extruder motor respectively, melt pump motor drives
It is dynamic；The melt force sensor, pressure transmitter, controller pass through constant-current source pressure regulation respectively, become direct current after power.
It as a further improvement of the present invention, further include the first shell, second housing, fixed plate, the screw extruder,
Melt Pump, extrusion machine gearbox, Melt Pump gearbox, pressure transmitter, extruder motor, melt pump motor are separately fixed at fixation
On plate, and controller, frequency converter are integrated in control module；
First pulley is installed, first pulley connect with the second belt wheel by belt and forms V belt translation machine in the connecting shaft
Structure, the second belt wheel are fixed on binder axis, and binder axis is packed into feed hopper and is set with, is fixed on the part being located in feed hopper
Cam；
The cam includes big end, small end, and when cam circumferentially rotates, big end constantly squeezes material to screw extruder；
The feed hopper is connected to feed pipe one end, and the feed pipe other end is connected to the material of external storage, feed hopper also with suction
Expects pipe connection；
The suction tube other end is connected to the suction chamber of inlet valve, and inlet valve is used to be controlled according to the material quantity in feed hopper
Whether need to continue to feed；
It sealed in the suction chamber of inlet valve, be slidably mounted charging piston, fed piston for suction chamber and be divided into two parts,
Middle a part is connected to suction tube, and another part is connected to air inlet pipe one end, and the air inlet of the air inlet pipe other end and suction ventilator connects
Logical, the exhaust outlet of suction ventilator is connected to air-exhausting duct.
As a further improvement of the present invention, there are two frequency converters, the electricity of extruder motor, melt pump motor is controlled respectively
It can input, and two frequency converter signal ends are communicated to connect with controller signals end respectively.
As a further improvement of the present invention, strainer, the strainer are installed on one end that suction tube is located in feed hopper
To guarantee the connection of suction tube and feed hopper for preventing material from entering in suction tube and also.
As a further improvement of the present invention, it is provided with venthole, seal groove on the charging piston, the venthole passes through
It pierces into material piston and is connected to seal groove, pass through pin shaft and sealing plate one end hinge mounted, sealing plate and seal groove in seal groove
Torsional spring is installed, torsional spring, which is used to generate, keeps sealing plate and the venthole power that axially inclined angle is opened between inner wall；
The charging piston is fixed with triggering protrusion on the end face of blast pipe one end, and this end face is also pasted with charging spring one end
It tightly or is welded and fixed, for charging spring pocket outside charging position-limiting tube, charging position-limiting tube inside is hollow charging inner tube.
As a further improvement of the present invention, it feeds in inner tube and charging microswitch is installed, feed the defeated of microswitch
Outlet is communicated to connect by the first conducting wire and controller signals end, and when charging microswitch is triggered, controller obtains signal
Input.
As a further improvement of the present invention, the first jacket is outside screw extruder, feed pipe, Melt Pump, feed hopper,
And it assembles and fixes with fixed plate；
Second housing is covered on outside extruder motor, control module, pressure transmitter, melt pump motor and is assembled with fixed plate and fixes.
It as a further improvement of the present invention, further include thermo valve, the thermo valve, including, valve casing is set respectively in valve casing
It is equipped with adjusting cavity, air blowing chamber, is provided with perforative gas hole on the air blowing chamber；
By connection tracheae connection between adjusting cavity, air blowing chamber, and regulating piston, adjustment spring are installed in adjusting cavity, it is described
Adjusting cavity is divided into two parts by regulating piston, wherein being also connected to gas-guide tube one end with tracheae connected component is connect, gas-guide tube
The other end is connected to air-exhausting duct；
The adjustment spring be mounted on adjusting cavity, not with connect in the part of tracheae connection, and one end and regulating piston assemble
The fixed, other end is sleeved on outside guide pipe, is hollow directed cavity inside guide pipe, and directed cavity is slidably filled with frizzen one end
Match, the frizzen other end is fixed on regulating piston, and adjusting microswitch is equipped in directed cavity, adjusts the defeated of microswitch
Outlet is communicated to connect by signal wire and controller signals end；
When original state, the regulating piston is by gas-guide tube and adjusting cavity connectivity part partial occlusion；Adjustment spring is memory spring,
It bounces back at a temperature of between 60-80 DEG C.
The beneficial effects of the present invention are:
The present invention has carried out micromation, light-weight design to FDM, and screw extruder is responsible for thermoplastic granulates in the entire system
Fusing and be delivered to Melt Pump arrival end, Melt Pump is responsible for quantifying thermoplastic melt into controllable extrusion.This mode can be real
The FDM molding of existing multiple material (including plastics, MIN feeding, CIM feeding) is more than the 2 of traditional wire rod at present on shaping speed
Times or more.Simultaneously because directly using granular materials, reduces FDM intermediate link and substantially reduce the cost of raw material.
The present invention is regulated and controled using pressure transmitter, and Melt Pump arrival end can be kept to have one to stablize suitable pressure
Value, can prevent the excessive screw rod stall for causing screw extruder of pressure and leakage, while can also prevent pressure oscillation from causing
Melt Pump squeeze out it is unstable.
Detailed description of the invention
Fig. 1 is composition block diagram of the invention.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is enlarged drawing at F1 in Fig. 2.
Fig. 4 is cam structure schematic diagram of the invention.
Fig. 5 is thermo valve structural schematic diagram of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
Referring to Fig. 1-Fig. 5, the FDM extrusion device based on single screw melt pump of the present embodiment, comprising:
Controller 271, for controlling the electric energy frequency of frequency converter output, the present embodiment uses PID controller；
Frequency converter 272, for exporting the electric energy of different frequency according to the signal of controller；
Screw extruder 230 is used for heating of plastic particle, while squeezing out after being melted；
Solution pressure sensor 240, for detecting the pressure of melt in feed pipe；
Melt Pump 250, for the melt extrusion after melting screw extruder, so as to realize that FDM is formed.
The screw extruder 230 further includes extruder motor 211, squeezes out machine gearbox 221, the extruder motor 211
Output shaft and the input axis connection for squeezing out machine gearbox 221, the output shaft of the extrusion machine gearbox 221 pass through connecting shaft
310 with the driving axis connection of screw extruder 230.So that power is by squeezing out machine gearbox when motor 211 is run out
The screw rod rotation in screw extruder 230 is directly driven after 221 speed regulation.Decelerating motor can be directly used to substitute extruder motor
211, machine gearbox 221 is squeezed out, at this point, decelerating motor directly drives the screw rod rotation of screw extruder 230.
The Melt Pump 250, further includes melt pump motor 212, Melt Pump gearbox 222, the melt pump motor 212
The assembly of the input shaft of output shaft and Melt Pump gearbox 222, transmission, output shaft and the Melt Pump 250 of Melt Pump gearbox 222
Drive shaft assembly, transmission.Melt Pump gearbox 222 is used to adjust the revolving speed that melt pump motor 212 is conveyed to Melt Pump 250, with
Existing automobile gearbox is similar.In the present embodiment, melt pump motor 212, Melt Pump gearbox 222 be can integrate as the electricity that slows down
Then machine directly drives Melt Pump 250 by this decelerating motor, and Melt Pump 250 can select gear pump.In use, directly
212 power of melt pump motor is adjusted the speed into rear drive gear pump operation by Melt Pump gearbox 222.
The feed inlet of the screw extruder 230 is connected to feed hopper 360, and the discharge port of screw extruder 230 passes through
Feed pipe 320 is connected to the feed inlet of the Melt Pump 250, and the discharge port of Melt Pump 250 is connected to discharge nozzle 330, in use,
The melt that Melt Pump 250 squeezes out is guided to predeterminated position by discharge nozzle 330.
Melt force sensor 240 is installed, melt force sensor 240 is used for real-time detection on the feed pipe 320
The pressure of melt in feed pipe 320.
240 signal output end of melt force sensor and 260 signal input part of pressure transmitter communicates to connect, pressure
260 signal output end of power transmitter and 271 signal end of controller communicate to connect, another signal end of controller 271 also with frequency conversion
The signal input part of device 272 communicates to connect；
Being conductively connected into electric end and external power supply of frequency converter 272, current output terminal respectively with extruder motor 211, melt pump motor 212
Into electric end be conductively connected；The melt force sensor, pressure transmitter, controller pass through constant-current source pressure regulation respectively, become
It powers after direct current.
In use, because there is variation in the extrusion pressure at screw extruder 230, so as to cause melt pressure in Melt Pump
Also can change, that is, will lead to input Melt Pump melt pressure it is unstable so that Melt Pump job insecurity.In order to
This case is avoided, the signal in feed pipe is delivered to pressure inverting in real time using melt force sensor 240 by the present embodiment
Device, pressure transmitter generate electric signal to controller convey, controller obtain pressure signal value after with preset pressure value into
Row compares, once deviation occurs in discovery, just as frequency converter transmission control instruction, thus by adjusting to extruder motor, Melt Pump
Motor conveying electric energy frequency (such as power frequency, power), extruder motor, melt pump motor inputing power adjusted after
Its state can also be adjusted therewith, to adjust extruder motor, the revolving speed of melt pump motor, output power etc., can also be adjusted
The revolving speed of the pressure of extruder motor melt extrusion, Melt Pump, the pressure signal value and preset pressure value obtained until controller exist
The electric energy for stopping adjusting extruder motor after in preset error range, so that the pressure of feed pipe is maintained set interval value
It is interior.
It is this to design the stabilization that realize Melt Pump extrusion pressure well, a level pressure is carried out to melt to realize
The extrusion in power section, to meet the molding requirement of FDM.
- Fig. 5 referring to fig. 2 further includes the first shell 110, second housing 120, fixed plate 130, the screw extruder
230, Melt Pump 250, extrusion machine gearbox 221, Melt Pump gearbox 222, pressure transmitter 260, extruder motor 211, melt
Pump motor 212 is separately fixed in fixed plate 130, and controller 271, frequency converter 272 are integrated in control module 270.This reality
Apply in example, frequency converter 272 can there are two, respectively control extruder motor 211, melt pump motor 212 electric energy input.Two
Frequency converter signal end is communicated to connect with controller signals end respectively.
First pulley 411 is installed, first pulley 411 passes through belt 410 and the second belt wheel 412 in the connecting shaft 310
Connect and formed tape handler, the second belt wheel 412 is fixed on binder axis 420, binder axis 420 be packed into feed hopper 360 in and
It is set on the part in feed hopper 360, is fixed with cam 430.When extruder motor operation, binder axis 420 and screw rod are squeezed
Machine is run simultaneously out.
The cam 430 include big end 431, small end 432, when cam 430 circumferentially rotates, big end 431 constantly by material to
Screw extruder squeezes, so that material can be inputted steadily to screw extruder；
The feed hopper 360 is connected to 350 one end of feed pipe, and 350 other end of feed pipe is connected to the material of external storage, charging
Bucket 360 is also connected to suction tube 510, and is equipped with strainer 511, the filter on the one end that is located in feed hopper 360 of suction tube 510
Net 511 is used to prevent material from entering in suction tube 510 and also to guarantee the connection of suction tube 510 Yu feed hopper 360；
510 other end of suction tube is connected to the suction chamber 291 of inlet valve 290, and inlet valve 290 is used for according to feed hopper 360
Interior material quantity judges whether to need to continue to feed；
It sealed in the suction chamber 291 of inlet valve 290, be slidably mounted charging piston 520, feed piston 520 for suction chamber 291
Two parts are divided into, a portion is connected to suction tube 510, and another part is connected to 292 one end of air inlet pipe, air inlet pipe 292
The other end is connected to the air inlet of suction ventilator 280, and the exhaust outlet of suction ventilator 280 is connected to 340 one end of air-exhausting duct；
Be provided with venthole 522, seal groove 521 on the charging piston 520, the venthole 522 through charging piston 520 and
It is connected to seal groove 521, passes through pin shaft 531 and 530 one end hinge mounted of sealing plate, sealing plate 530 and sealing in seal groove 521
Torsional spring is installed, torsional spring, which is used to generate, makes sealing plate 530 keep opening certain angle with venthole 522 between 521 inner wall of slot
Power, this angle cannot be greater than 90 °, generally 30-60 °.It can not be to sealing because angle will lead to greatly very much venthole 522
Plate 530 generates enough suction, seals venthole 522 so that sealing plate 530 can not be packed into seal groove 521.
The charging piston 520 be fixed on 292 one end end face of blast pipe triggering protrusion 523, and this end face also with
Charging 540 one end of spring is adjacent to or is welded and fixed, and charging spring 540 is sleeved on outside charging position-limiting tube 560, feeds position-limiting tube 560
Inside is hollow charging inner tube 561, feeds and is equipped with charging microswitch 550 in inner tube 561, charging microswitch 550
Output end is communicated to connect by the first conducting wire 551 with controller signals end, when charging microswitch 550 is triggered, controller
Obtain signal input.
When needing to feed, suction ventilator 280 is powered operation, to generating negative pressure inside suction tube 510, feed hopper 360, at this point,
Feed pipe 350 also generates negative pressure, so that, due to there is the barrier of strainer, material will not by material out of feed pipe sucking feed hopper
Into in suction tube 510, but after the material in hopper floods suction tube, the air-flow at strainer can generate certain resistance
Every, that is, the negative pressure in feed pipe 350 is different from the negative pressure of suction tube 510 (less than the negative pressure of suction tube 510), this is allowed for
Vacuum suction of the sealing plate 530 by venthole 522, thus make its overcome torsional spring elastic force to seal groove rotate, until with sealing
Slot sealing assembly；
At this point, charging piston 520 can overcome charging spring force to charging microswitch under the suction of suction ventilator 280
550 is mobile, and until 523 triggering charging microswitch 550 of triggering protrusion, controller obtains signal input at this time, thus judge into
Material is on the high side in hopper, and the suction ventilator 280 of controller control at this time reduces power or directly closes, to avoid occurring in feed hopper
Blocking.Of course, it is possible to which air inlet pipe 292 is connected to the exhaust outlet of pressure-supplementing valve, the air inlet of pressure-supplementing valve is connected to outside atmosphere, when
When air inlet pipe 292 generates larger negative pressure, pressure-supplementing valve is opened, to unload the negative pressure that suction ventilator 280 is formed in air inlet pipe 292.
When the material in feed hopper is reduced, negative pressure in suction tube 510 can gradually with feed hopper inner equilibrium so that
It feeds piston 520 to restore close to 510 side air pressure of suction tube, during sealing plate 530 can be with pin shaft 531 under the effect of torsion spring at this time
Heart rotating opening, at this point, charging spring can drive charging piston 520 to reset, makes to again be connected to venthole with suction tube
Microswitch 550 must be fed no longer to be triggered, that is, charging microswitch no longer conveys signal to controller.At this point, control
Device controls suction ventilator and restores feed state, to be fed.In the present embodiment, it can be led what suction ventilator was connected to external power supply
One frequency converter of series connection on line, frequency converter are controlled by controller, so as to realize the operating status of control suction ventilator.
Preferably due to when in use, screw extruder, feed pipe, the quantity of heat production at Melt Pump are higher, it is necessary to be divided
From otherwise will lead to that the first shell, heat is excessively high and influence the operation of other equipment in second housing.
The present invention outside screw extruder, feed pipe, Melt Pump, feed hopper, finally fills the first jacket with fixed plate
With fixation, to realize the isolation of heat.
In addition, second housing 120 cover on extruder motor, control module, pressure transmitter, outside melt pump motor, and with it is solid
Fixed board assembly is fixed, to realize the protection to electrical equipment.
Preferably due to which in use, the equipment such as extruder motor, control module, pressure transmitter, melt pump motor can generate
Larger heat, if without radiating in time, will lead to heat concentrate, the temperature rises, seriously affect each electrical equipment
Operation.Therefore, heat dissipation is carried out to be necessary.
In the present embodiment, in the bigger portion of extruder motor, control module, pressure transmitter, melt pump motor quantity of heat production
Be fixed with thermo valve 600 on point, the bigger place such as extruder motor of quantity of heat production, melt pump motor heat dissipating housing, control module,
The radiator or cooling fin of pressure transmitter.
Referring to Fig. 5, the thermo valve 600, including, valve casing 610 is respectively arranged with adjusting cavity 611 in valve casing 610, blows
Chamber 612 is provided with perforative gas hole 613 on the air blowing chamber 612, in use, air-flow is blown out from gas hole, thus realize by
Heat is taken away, that is, radiates；
It is connected between adjusting cavity 611, air blowing chamber 612 by connection tracheae 620, and regulating piston is installed in adjusting cavity 611
630, adjusting cavity 611 is divided into two parts by adjustment spring 650, the regulating piston 630, wherein being connected to tracheae 620 is connect
Part is also connected to 640 one end of gas-guide tube, and 640 other end of gas-guide tube is connected to air-exhausting duct 340, so that air-exhausting duct interior air-flow be drawn
Enter in gas-guide tube 640；
The adjustment spring 650 be mounted on adjusting cavity 611, not with connect in the part of the connection of tracheae 620, and one end and adjusting
The assembly of piston 630 is fixed, the other end is sleeved on outside guide pipe 670, is hollow directed cavity 671, directed cavity inside guide pipe 670
671 slidably assemble with 660 one end of frizzen, and 660 other end of frizzen is fixed on regulating piston 630, and in directed cavity 671
It is equipped with and adjusts microswitch 680, the output end for adjusting microswitch 680 is communicated by signal wire 681 with controller signals end
Connection.When adjusting microswitch 680 is triggered, controller determines that this thermo valve 600 is mounted on device and may overheat, to mention
Awake operator is handled in time.
By gas-guide tube 640 and 611 connectivity part partial occlusion of adjusting cavity, this implementation when 630 original state of regulating piston
In example, regulating piston 630 blocks gas-guide tube 640 with the 2/3 of 611 connectivity part section of adjusting cavity, so that gas-guide tube 640
There is 1/3 part to be connected to air blowing chamber 612；
And adjustment spring 650 is memory spring, is bounced back at a temperature of between 60-80 DEG C.When the temperature that valve casing 610 is subject to
When spending higher, temperature can be transferred to adjustment spring 650, adjustment spring 650 can bounce back after obtaining temperature, so that adjusting be driven to live
Plug 630 is mobile to guide pipe, to gradually increase the sectional area that gas-guide tube 640 is connected to air blowing chamber 612, also just value increase enters
The air quantity of air blowing chamber 612, to realize rapid cooling.
If temperature continues to rise, adjustment spring 650 continues to bounce back, and until triggering adjusting microswitch 680, controls at this time
Device obtains signal input, and issues overheat warning to operator.On the one hand this design using the air-flow of suction ventilator discharge, is realized
Energy conservation.On the other hand the air quantity for entering air blowing chamber 612 can be controlled by adjustment spring 650, to realize according to each equipment
Calorific value flexible modulation air quantity is to realize the optimization of allocation of the amount of air.Finally, also having overheat warning, heat alarm in overheat
Output, so that operator be notified to handle in time, prevents equipment damage.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of FDM extrusion device based on single screw melt pump characterized by comprising
Controller, for controlling the electric energy frequency of frequency converter output；
Frequency converter, for exporting the electric energy of different frequency according to the signal of controller；
Screw extruder is used for heating of plastic particle, while squeezing out after being melted；
Solution pressure sensor, for detecting the pressure of melt in feed pipe；
Melt Pump, for the melt extrusion after melting screw extruder；
The feed inlet of the screw extruder is connected to feed hopper, and the discharge port of screw extruder is melted by feed pipe with described
The feed inlet connection of body pump, the discharge port of Melt Pump are connected to discharge nozzle；
Melt force sensor is installed, melt force sensor is for melt in real-time detection feed pipe on the feed pipe
Pressure；
The melt force sensor signal output end and pressure transmitter signal input part communicates to connect, pressure transmitter letter
Number output end and controller signals end communicate to connect, another signal end of controller also with the signal input part communication link of frequency converter
It connects；
Being conductively connected into electric end and external power supply of frequency converter, current output terminal respectively with extruder motor, melt pump motor into electric end
It is conductively connected.
2. FDM extrusion device as described in claim 1, which is characterized in that the screw extruder, further include extruder motor,
Squeeze out machine gearbox, the output shaft of the extruder motor and the input axis connection for squeezing out machine gearbox, the extruder speed change
The output shaft of case passes through the driving axis connection of connecting shaft and screw extruder；
The Melt Pump, further includes melt pump motor, Melt Pump gearbox, and the output shaft and Melt Pump of the melt pump motor become
Input shaft assembly, the transmission of fast case, the output shaft of Melt Pump gearbox and drive shaft assembly, the transmission of Melt Pump.
3. FDM extrusion device as claimed in claim 1 or 2, which is characterized in that screw extruder, Melt Pump pass through crowded respectively
Motor, Melt Pump motor driven out；The melt force sensor, pressure transmitter, controller pass through respectively constant-current source pressure regulation,
It powers after becoming direct current.
4. FDM extrusion device as claimed in claim 1 or 2, which is characterized in that further include the first shell, second housing, fixation
Plate, the screw extruder, squeeze out machine gearbox, Melt Pump gearbox, pressure transmitter, extruder motor, Melt Pump at Melt Pump
Motor is separately fixed in fixed plate, and controller, frequency converter are integrated in control module；
First pulley is installed, first pulley connect with the second belt wheel by belt and forms V belt translation machine in the connecting shaft
Structure, the second belt wheel are fixed on binder axis, and binder axis is packed into feed hopper and is set with, is fixed on the part being located in feed hopper
Cam；
The cam includes big end, small end, and when cam circumferentially rotates, big end constantly squeezes material to screw extruder；
The feed hopper is connected to feed pipe one end, and the feed pipe other end is connected to the material of external storage, feed hopper also with suction
Expects pipe connection；
The suction tube other end is connected to the suction chamber of inlet valve, and inlet valve is used to be controlled according to the material quantity in feed hopper
Whether need to continue to feed；
It sealed in the suction chamber of inlet valve, be slidably mounted charging piston, fed piston for suction chamber and be divided into two parts,
Middle a part is connected to suction tube, and another part is connected to air inlet pipe one end, and the air inlet of the air inlet pipe other end and suction ventilator connects
Logical, the exhaust outlet of suction ventilator is connected to air-exhausting duct.
5. FDM extrusion device as described in claim 1 or 4, which is characterized in that there are two frequency converters, and control squeezes out respectively
The electric energy input of motor, melt pump motor, and two frequency converter signal ends are communicated to connect with controller signals end respectively.
6. FDM extrusion device as claimed in claim 4, which is characterized in that installed on one end that suction tube is located in feed hopper
There is strainer, the strainer is used to prevent material from entering in suction tube and also to guarantee the connection of suction tube and feed hopper.
7. FDM extrusion device as claimed in claim 4, which is characterized in that be provided with venthole, sealing on the charging piston
Slot, the venthole are connected to through charging piston and with seal groove, pass through pin shaft and sealing plate one end hinge mounted in seal groove,
Torsional spring is installed, torsional spring makes sealing plate holding and venthole axially inclined folder for generating between sealing plate and seal groove inner wall
The power that angle is opened；
The charging piston is fixed with triggering protrusion on the end face of blast pipe one end, and this end face is also pasted with charging spring one end
It tightly or is welded and fixed, for charging spring pocket outside charging position-limiting tube, charging position-limiting tube inside is hollow charging inner tube.
8. FDM extrusion device as claimed in claim 7, which is characterized in that charging microswitch is installed in charging inner tube, into
Expect that the output end of microswitch is communicated to connect by the first conducting wire and controller signals end, when charging microswitch is triggered,
Controller obtains signal input.
9. FDM extrusion device as claimed in claim 4, which is characterized in that the first jacket screw extruder, feed pipe,
Outside Melt Pump, feed hopper, and assembles and fix with fixed plate；
Second housing is covered on outside extruder motor, control module, pressure transmitter, melt pump motor and is assembled with fixed plate and fixes.
10. FDM extrusion device as claimed in claim 4, which is characterized in that it further include thermo valve, the thermo valve, including,
Valve casing is respectively arranged with adjusting cavity, air blowing chamber in valve casing, is provided with perforative gas hole on the air blowing chamber；
By connection tracheae connection between adjusting cavity, air blowing chamber, and regulating piston, adjustment spring are installed in adjusting cavity, it is described
Adjusting cavity is divided into two parts by regulating piston, wherein being also connected to gas-guide tube one end with tracheae connected component is connect, gas-guide tube
The other end is connected to air-exhausting duct；
The adjustment spring be mounted on adjusting cavity, not with connect in the part of tracheae connection, and one end and regulating piston assemble
The fixed, other end is sleeved on outside guide pipe, is hollow directed cavity inside guide pipe, and directed cavity is slidably filled with frizzen one end
Match, the frizzen other end is fixed on regulating piston, and adjusting microswitch is equipped in directed cavity, adjusts the defeated of microswitch
Outlet is communicated to connect by signal wire and controller signals end；
When original state, the regulating piston is by gas-guide tube and adjusting cavity connectivity part partial occlusion；Adjustment spring is memory spring,
It bounces back at a temperature of between 60-80 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401995.5A CN110181807A (en) | 2019-05-15 | 2019-05-15 | A kind of FDM extrusion device based on single screw melt pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401995.5A CN110181807A (en) | 2019-05-15 | 2019-05-15 | A kind of FDM extrusion device based on single screw melt pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110181807A true CN110181807A (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910401995.5A Pending CN110181807A (en) | 2019-05-15 | 2019-05-15 | A kind of FDM extrusion device based on single screw melt pump |
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| Country | Link |
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| CN (1) | CN110181807A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112295288A (en) * | 2020-10-22 | 2021-02-02 | 福建鼎华生物科技有限公司 | Low viscosity liquid class cosmetics liquid separator |
| CN112373027A (en) * | 2020-11-03 | 2021-02-19 | 西安昆仑工业（集团）有限责任公司 | Compound 3D that extrudes prints shower nozzle and 3D printer |
-
2019
- 2019-05-15 CN CN201910401995.5A patent/CN110181807A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112295288A (en) * | 2020-10-22 | 2021-02-02 | 福建鼎华生物科技有限公司 | Low viscosity liquid class cosmetics liquid separator |
| CN112373027A (en) * | 2020-11-03 | 2021-02-19 | 西安昆仑工业（集团）有限责任公司 | Compound 3D that extrudes prints shower nozzle and 3D printer |
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Application publication date: 20190830 |