CN107175812B - A kind of 3D printing process of polycaprolactone cryogenic material - Google Patents

A kind of 3D printing process of polycaprolactone cryogenic material Download PDF

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Publication number
CN107175812B
CN107175812B CN201710423233.6A CN201710423233A CN107175812B CN 107175812 B CN107175812 B CN 107175812B CN 201710423233 A CN201710423233 A CN 201710423233A CN 107175812 B CN107175812 B CN 107175812B
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China
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printing
temperature
software
print
cooling
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CN201710423233.6A
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Chinese (zh)
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CN107175812A (en
Inventor
聂健良
陈耿涛
周武艺
董先明
孔楚海
张剑威
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广州洛根信息技术有限公司
华南农业大学
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE 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
    • B33Y40/00Auxiliary operations or equipment, e.g. for material handling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE 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
    • B33Y50/00Data acquisition or data processing for additive manufacturing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • B29C2035/1658Cooling using gas
    • B29C2035/1666Cooling using gas dried air

Abstract

The present invention provides a kind of 3D printing process of polycaprolactone cryogenic material, it prints processing method and is to obtain 3D printing model using scanner or design software first, it reuses corresponding model treatment software and model handle and set to parameter, and export the mimeograph documents of corresponding format, need to check that can printing device work normally and guarantee that equipment is all gone well before printer model product, need to carry out the secondary setting to printing technological parameter after into moldings printing, printing product is removed after the completion of printing and printing product of fighting each other is post-processed, finally pass through quality and apparent inspection, finally obtain qualified printing product.

Description

A kind of 3D printing process of polycaprolactone cryogenic material

Technical field

The invention belongs to processing of high molecular material applied technical fields, and in particular to a kind of 3D of polycaprolactone cryogenic material Printing technology method.

Background technique

3D printing technique is a kind of rapid prototyping & manufacturing technology currently having gradually developed, and is that a kind of environmental protection highlights Personalized manufacturing technology.At present using the printing device at most with widest printing device being FDM, basic principle is main It is, using fused glass pellet technology, to be completed by successively printing accumulation mode to object configurations using high molecular material as substrate And formation.Now on the market for the high molecular material of 3D printing mainly based on the material of high temperature, to low-temperature composite material Research and development exploitation it is fewer, and to the research of the printing manufacturing process of cryogenic material with regard to less.Most cryogenic material is main It is all to apply on 3D printing pen, the almost normal print seldom on 3D printer, and be more just difficult to printing shaping manufacture Point.

It is domestic at present seldom to the relevant report in terms of 3D printing Study on Forming, and polycaprolactone 3D printing is formed Relevant report is just less in terms of the research of the technology of manufacture.Shenzhen Guangyunda Optoelectronic Technology Co., Ltd Patent of invention (the Patent No. of " a kind of the 3D printing of model exempt from assembling manufacturing method " that Hou Ruohong, Wang Hao et al. are proposed CN201510069101.9 what is) introduced is that assembly technology is exempted from a kind of 3D printing that plastic powders are laser sintered, and what is told about herein is A kind of printing manufacturing process of low temperature wire rod melting extrusion deposition modeling;What Agricultural University Of South China Zhou Wuyi, Hu Yang et al. were proposed Patent of invention (the Patent No. of " a kind of to prepare the method for blood vessel wall bracket using 3D printing technique and its prepare product " CN201610676960.9 what is) introduced is a kind of Method of printing of blood vessel wall bracket, but it does not cool down function to printing device The requirement of energy, and the high molecular material that the polymer used is high-temperature fusion is printed, and what is introduced herein is a kind of watery fusion High molecular polymer printing processing technology;What Shanghai Fine Chemical Co., Ltd Cao Ping, Huang Yingze, Ma Yunjun were proposed What the patent of invention (Patent No. CN201610806707.0) of " a kind of 3D printing mold and its manufacturing method " was introduced is mold Structure is formed and the method for manufacture, and what is mainly utilized is laser sintered 3D printing technique to manufacture the mould with engraved structure Tool;Jiangxi HongDou Space Industry Group Co., Ltd Chen Yanjun, Li Yao et al. propose " a kind of Ti6Al4V powder 3D is beaten What the patent of invention (Patent No. CN201610843770.1) of print increasing material manufacturing technique " was introduced is that a kind of metal powder is laser sintered Molding 3D printing manufacturing method, is not related to the processing technology of high molecular polymer and low temperature polymer.

Summary of the invention

For in current 3D printing technique to the immature of the printing manufacturing technology of low temperature high molecular material, at present according to normal The method of rule almost can not crystallize cryogenic material to polycaprolactone etc. and carry out industrialized 3D printing manufacture.Preliminary Analysis On The Reasons are Polycaprolactone cryogenic material melting temperature is low, and the temperature difference formed with room temperature room temperature is fewer, needs the cooling time longer.For The 3D printing manufacture for realizing low temperature polycaprolactone material, needs to innovate printing device and printing method of manufacturing technology.

The present invention is achieved through the following technical solutions: a kind of 3D printing equipment of polycaprolactone cryogenic material, packet A low temperature high molecular material printing device is included, the Main chemical component of the low temperature high molecular material is that polycaprolactone is Filamentous Wire rod, the low temperature high molecular material printing device main device include that heating device, cooling device and printing device are whole Structure.

The heating device mainly includes print platform heating device and print head heating as a preferred technical solution, Device, wherein print platform temperature can heated perimeter require be 0~150 DEG C, the temperature heated perimeter for printing head heating device is wanted Ask is 0~260 DEG C.

The cooling device mainly includes the inner ring of print head cooling device and sealed environment as a preferred technical solution, Border cooling device.

The print head cooling device is that the air-cooled form of fan is cooling as a preferred technical solution, shares 3 wind Fan controls the cooling small fan for respectively having a melting extrusion material using printer operation direction as from the point of view of the front of object of reference, Its revolving speed is all 1000~4000r/min, before have the dedicated cooling small fan of a print head radiating block, revolving speed 1000 ~6000r/min.

The interior environment cooling device of the sealed environment is micro constant-temperature cooling device as a preferred technical solution, Cooling constant temperature adjustment range is -5~30 DEG C.

The integrally-built chief component of the printing device is three axial movement controls as a preferred technical solution, Motor processed and a wire rod extruder motor are all made of servo motor, and three surge motion control motors and high-precision screw rod Connection is driven, and wherein screw rod transmission precision is 0.01mm.

The gauge or diameter of wire of the low temperature high molecular material is having a size of 1.70~3.10mm, phase as a preferred technical solution, It is 30000~80000 to molecular weight.

Specially following operating procedure: Step 1: obtaining model:

Layout design: the sketch of template is first designed or using 3D scanner or CT scanner to template according to the pattern of template Object carries out comprehensive scanning and obtains initial model;

Software design or modification: the modelling of profession is carried out according to layout design using professional mapping software or 3D is swept Retouch the modification that the initial model that instrument and CT scanner scan carries out details;

Reduced model file: the model that design is completed or the model that modification is completed are exported with particular file format;

Step 2: processing model:

Software processing: divided using the particular file format model that model treatment software obtains (1) in claim 9 Analysis processing.Main processing portion includes that model is moved to suitable position, by software rotation function by the three-dimensional side of model Angle in more than any one direction or a direction rotates to most suitable position, according to the requirement of size to model into Row zooms in or out or constant by master mould size;Model is divided using the model inspection function in model treatment software Analysis, inspection model design when whether defective or loophole;

Parameter setting: the nozzle bore used is 0.1~0.6mm;Thickness setting, initial thickness is set as 0.1~ 0.2mm, normal print thickness are set as 0.15~0.2mm;Wall thickness is set as 0.4~2.0mm, and top layer and underlayer thickness are set as 0.6~2.0mm;Print temperature is set as 60~120 DEG C, and platform temperature is set as 40~65 DEG C;Normal print speed is set as 20~80mm/s, speed when wherein printer is mobile are set as 100~200mm/s, and bottom and top layer speed are all set as 20- 60mm/s, inner wall print speed are set as 30~90mm/s, and outer wall print speed is set as 20~60mm/s, filling speed setting For 50~150mm/s, rollback speed is 20~60mm/s;Flow set, initial flow are set as 105~150%, normal print When flow set be 95~105%;All support, part support or without the one of them in support for supporting type selection;It beats The filling of stamp type, packed density are set as 10~100%, filling shape is filled for concentric arc filling, straight line, triangle is filled, One of quadrangle filling or hexagon filling;

Export is to SD card: processing analysis being completed and the model file of parameter setting completion is with the format text of gcode Part exports in specified SD card;

Step 3: preparing before printing:

Check printer: printer connected with the mains and check printer switch, operation button and screen and printing intermittent headache Fan whether normal operation;

Insertion SD card: the SD card for the gcode format print file that (2) are imported in claim 9 is inserted into printer SD card is specified in deck, and is determined whether printer retrieves file in SD card by operation button and operation interface;

It loads onto hole hole plate or glass plate: loading onto sizeable hole hole plate or glass plate on print platform, and make It is screwed or special clip is fixed;

Leveling print platform: leveling print platform using the self-level(l)ing device or system of printing device itself, And it manually adjusts at the details that platform automatic horizontal control system is not adjusted in place;

It is fitted into low temperature wire rod: the suitable low temperature wire rod of line footpath is encased in printing device;

The detection smooth property of reactor effluent stream: printhead temperature is warming up to 60~150 DEG C by operation button and operation interface, will be beaten Print platform temperature is raised to 35~65 DEG C, opens extruder motor by operation button and operation interface and gets into wire rod, detects print head The case where discharging, until its discharging is continuous, smooth and normally;

It detects constant-temperature cooling device: opening interior environment constant-temperature cooling device in printing device, detect the printing of cryogenic thermostat Environment, follow-on test, until interior environment temperature can reach the temperature position that printing needs, finally confirmation printing device is all gone well And use can be printed;

Step 4: printer model:

Selection mimeograph documents: it is entered in SD card file content and is selected by step operation by operation button and operation interface In 9 (2) lead into gcode format print file and click confirmation printing;

Environment temperature in setting: environment constant-temperature cooling device in opening adjusts the interior environment temperature of sealing to 5~15 ℃;

The secondary setting of print parameters: the two of printing technology parameter are carried out for the physico-chemical property of cryogenic material or polycaprolactone Secondary setting;After printing device printing starts, when product bottom prints to 3~8 layers, the temperature of platform is reduced by 3~15 first DEG C, then the temperature of constant-temperature cooling device is reduced by 1~10 DEG C, then big squeeze out flow (105~150%) of starting are adjusted to just Normal extrusion flow (100%);Finally obtain printing product.

Step 5: taking out printing product:

After the completion of model printing, interior environment constant-temperature cooling device is allowed to continue cooling 3~15min, makes printing product completely cold But interior environment cooling device is turned off after being formed;It unscrews fixed screw or takes away fixing, remove hole hole plate or glass plate And moldings;

Warm water takes product: one end of the hole hole plate with the moldings of hole hole plate being placed into warm water, warm water Temperature is 40~70 DEG C, and the depth for immersing warm water is the thickness or 0.5~1.5mm of hole hole plate;

Shovel sled takes product: will be adhered to using modulus perching knife in moldings with the moldings of glass plate or hole hole plate Around shovel into 1~8mm, then model is slowly levered up with modulus perching knife on glass plate or hole hole plate, finally takes out model Product;Or slightly firmly pull the hole hole plate of plastics to slight curvature, allow moldings slowly from plastic composite It is peeled away on the hole plate of hole, then smoothly removes moldings again;

Step 6: product post-processes

It removes support: being set up when moldings is printed and be adhered to the removing of the backing material on moldings and do Only;

Surface smooth treatment: after removing support, the fraction bonding scar processing left when removal is supported is smooth;It will All filoplumes on moldings surface, tartar etc. remove and handle equating;

Step 7: product is examined:

Visual examination: check surface flatness, whether be layered between layers or staggered floor, product with the presence or absence of it is certain lack It falls into, either with or without leaving scratch etc.;

Weight detecting: the quality for the product that printing is completed, the quality after comparison software slice generation, it is desirable that printed are weighed At product quality be not greater than or less than software slice generate after quality 5%;

Step 8: obtaining qualified product: product after post treatment and after the assay was approved, then obtains excellent or qualified mould Type product to get arrive product finished product.

Preferably, the professional mapping software in step 1 is Solid Works software, 3DsMAX software, 123D One of Design software, UG software, Auto CAD software, the particular file format are stl file format, OBJ text One of part format, AMF file format, DAE file format.

Preferably, the model treatment software in step 2 is Cura software, Repetier-Host software or UP software One of.

Preferably, can print by the above printing device and printing processing method and produce qualified cryogenic material Print product.

The invention has the characteristics that:

1, the printing device in the present invention uses dual-cooled mode and cools down to watery fusion extruded stock, respectively Print head cooling device and interior environment constant-temperature cooling device.The introducing of cooling device largely increases molten with use Melt material and form the temperature difference of environment, polycaprolactone or low temperature crystallization class material are during rapid cooling, strand meeting More nucleus are formed in a short time, increase crystallization rate, and the speed for crystallizing faster i.e. cooling and solidifying is also accelerated therewith;

2, the printing device structure in the present invention uses servo motor as stable driving, than common stepper motor Deng stability to get well, make printing device have stable high speed operating power;On the other hand high-precision screw rod is used to make For the transmission shaft of tri- axis of XYZ, ball screw accuracy 0.01mm, and screw rod is directly embedded into the axle center of servo motor, significantly The required precision for improving printing device.Servo motor is organically combined with high-precision screw rod, is beaten being both able to maintain While printing product precision, the speed of printing is also largely increased, it is 2~8 times of normal printer that speed, which increases,;

3, the secondary setting of technological parameter in the present invention in print procedure saliency was not referred in 3D printing One technical process.Mainly the temperature including print platform reduces by 3~15 DEG C, constant temperature cooling for the setting of technological parameter herein The temperature of device reduces by 1~10 DEG C and big squeeze out flow (105~150%) of starting are adjusted to normal minimum flow (100%) Three aspects.Print platform starts higher temperature, mainly allows macromolecule to be easier to adhere to and cling platform, temperature gets over macromolecule Chain heat absorption acquisition thermal energy movement is faster, and the extensibility of strand is bigger, the entanglement or adherency to terrace part rough surface Ability it is just bigger;And reduce platform temperature after printing to certain number of plies and be not not heat directly, mainly basis gathers oneself The heating and softening point of lactone polymer is set, if platform is stopped heating, the polymer of bottom being softened or melted Will slowly it solidify, strand starts crystallization folding during cured, generates portion retracts, can thus make product bottom There is the alice phenomenon shunk and generated, finally influences whether the print quality of product.Internal Environmental Incubator cooling device cooling Purpose mainly make melting extrusion material cooling solid within the shortest time in the case where not influencing product bottom layer alice Change.And increase starting and squeeze out flow primarily to compressing compacting bottom, it can also allow bottom and print platform to adhere to and tangle more It is good stronger;

4, the process that warm water modulus is used in the present invention did not generated damage to moldings when both can guarantee modulus Or it destroys, and (such as ABS model is taken the method for the certain organic solvents immersion modulus of relative usage again after being impregnated using acetone solvent Mould) it is more safe and environment-friendly and nontoxic;

5, the filling of preferred hexagon in the filling shape introduced in the present invention, hexagon has better impact resistance energy Power, and the percentage of suitable filling shape and filling is selected according to the different shape size of product, the product for obtaining printing Can impact resistance there is also relatively good flexible and deformation resiliencies.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is present invention printing manufacturing process flow diagram.

Specific embodiment

All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.

Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only It is an example in a series of equivalent or similar characteristics.

As shown in Figure 1, including a low temperature high molecular material printing device, mainization of the low temperature high molecular material Group is divided into polycaprolactone filiform wire rod, and the low temperature high molecular material printing device main device includes heating device, cold But device and printing device overall structure.

Heating device mainly includes print platform heating device and printing head heating device, and wherein print platform temperature can add Heat rating requires to be 0~150 DEG C, and the temperature heated perimeter requirement for printing head heating device is 0~260 DEG C.Cooling device is main Interior environment cooling device including print head cooling device and sealed environment.

Print head cooling device is that the air-cooled form of fan is cooling, shares 3 fans, operates direction as ginseng using printer From the point of view of the front of object, respectively there is the cooling small fan of a melting extrusion material in left and right, and revolving speed is all 1000~4000r/ Min, before have a dedicated cooling small fan of a print head radiating block, revolving speed is 1000~6000r/min.

The interior environment cooling device of sealed environment is micro constant-temperature cooling device, cooling constant temperature adjustment range is -5~ 30℃.The integrally-built chief component of printing device be three surge motion control motors and a wire rod extruder motor, It is all made of servo motor, and three surge motion control motors connect with high-precision screw rod and are driven, wherein screw rod transmission Precision is 0.01mm.The gauge or diameter of wire of low temperature high molecular material having a size of 1.70~3.10mm, relative molecular weight is 30000~ 80000。

Embodiment 1

Injury of finger is designed according to the organization of human body of finger using Solid Works software first and repairs strap 3D mould Type simultaneously exports stl file format;It reuses Cura software to be moved to most suitable position to model and analyze, it is ensured that model Normal absence gaps and omissions;Using the print head of 0.4mm diameter, 0.12mm is arranged in initial thickness, and normal print thickness is set as 0.18mm;Wall thickness is set as 0.8mm, and top layer and underlayer thickness are set as 0.9mm;Print temperature is set as 82 DEG C, platform temperature It is set as 60 DEG C;Normal print speed is set as 40mm/s, and speed when wherein printer is mobile is set as 150mm/s, bottom It is all set as 35mm/s with top layer speed, inner wall print speed is set as 35mm/s, and outer wall print speed is set as 25mm/s, fills out It fills speed and is set as 100mm/s, rollback speed is 40mm/s;Flow set, initial flow are set as 115%, when normal print Flow set be 100%, do not need to build support, input 45% packed density, select the honeycomb filling shape of hexagon; After the completion of parameter setting, gcode file is exported to SD card, and be inserted into the specified deck of printing device;Printer model it Preceding inspection printing device simultaneously guarantees it all is good for use, loads onto hole hole plate, is packed into wire rod, levels platform, detects and guarantee Printing device discharging is normal smooth and guarantees that interior environment constant-temperature cooling device is normal, and interior environment constant-temperature cooling device setting temperature Degree is 15 DEG C;It is entered in SD card by operation button and operating platform and injury of finger reparation strap is selected to start to print, Platform temperature is reduced to 55 DEG C when printing to the 5th layer, the temperature of constant-temperature cooling device is reduced to 10 DEG C and by squish flow Amount is adjusted to 100%, finally obtains printing product.Product is removed using 55 DEG C of warm water and removes support and model is repaired It is whole;Re-inspection product apparently whether there is problem, finally obtains qualified injury of finger and repairs strap product.

Case study on implementation 2

Arm fixing sleeve 3D model is designed according to human body arm structure using Solid Works software first and exports STL File format;It reuses Cura software to be moved to most suitable position to model and analyze, it is ensured that model normal absence Gaps and omissions;Using the print head of 0.4mm diameter, 0.12mm is arranged in initial thickness, and normal print thickness is set as 0.18mm;Wall thickness is set It is set to 0.8mm, top layer and underlayer thickness are set as 0.9mm;Print temperature is set as 80 DEG C, and platform temperature is set as 60 DEG C;Just Normal print speed is set as 25mm/s, and speed when wherein printer is mobile is set as 100mm/s, and bottom and top layer speed are all set It is set to 25mm/s, inner wall print speed is set as 20mm/s, and outer wall print speed is set as 20mm/s, and rollback speed is 30mm/ s;Flow set, initial flow are set as 110%, and flow set when normal print is 100%, do not need to build support, input 100% packed density;After the completion of parameter setting, gcode file is exported to SD card, and is inserted into the specified deck of printing device In;Printing device is checked before printer model and guarantees it all is good for use, loads onto hole hole plate, is packed into wire rod, leveling Platform detects and guarantees that printing device discharging is normal smooth and guarantee that interior environment constant-temperature cooling device is normal, and interior environment is permanent Warm cooling device setting temperature is 12 DEG C;Being entered in SD card by operation button and operating platform selects injury of finger reparation solid Clamp plate starts to print, and platform temperature is reduced to 50 DEG C when printing to the 5th layer, is reduced to the temperature of constant-temperature cooling device 8 DEG C and squish flow amount is adjusted to 100%, finally obtains printing product.Product is removed using 55 DEG C of warm water and removes support And to cast trimming;Re-inspection product apparently whether there is problem, finally obtain qualified arm fixing sleeve product.

Case study on implementation 3

Prosthese finger fixes bracket

Prosthese finger and fixed bracket are designed according to the organization of human body of finger or severed finger using Solid Works software first 3D model simultaneously exports stl file format;Cura software is reused to be moved to most suitable position to model and analyze, it is ensured that Model normal absence gaps and omissions;Using the print head of 0.4mm diameter, 0.12mm, the setting of normal print thickness is arranged in initial thickness For 0.18mm;Wall thickness is set as 0.8mm, and top layer and underlayer thickness are set as 0.9mm;Print temperature is set as 80 DEG C, platform temperature Degree is set as 60 DEG C;Normal print speed is set as 30mm/s, and speed when wherein printer is mobile is set as 120mm/s, bottom Layer and top layer speed are all set as 25mm/s, and inner wall print speed is set as 25mm/s, and outer wall print speed is set as 25mm/s, Rollback speed is 40mm/s;Flow set, initial flow are set as 110%, and flow set when normal print is 100%, no It needs to build support, inputs 100% packed density;After the completion of parameter setting, gcode file is exported to SD card, and be inserted into and beat In the specified deck of printing apparatus;Printing device is checked before printer model and guarantees it all is good for use, loads onto hole hole Plate, is packed into wire rod, and leveling platform detects and guarantees that printing device discharging is normal smooth and guarantee interior environment constant-temperature cooling device Normally, and interior environment constant-temperature cooling device setting temperature is 15 DEG C;It is entered in SD card and is selected by operation button and operating platform It selects injury of finger reparation strap to start to print, platform temperature is reduced to 55 DEG C when printing to the 5th layer, cools down constant temperature The temperature of device is reduced to 10 DEG C and squish flow amount is adjusted to 100%, finally obtains printing product.It is taken using 55 DEG C of warm water Lower product and remove support and to cast trimming;Re-inspection product apparently whether there is problem, finally obtain qualified prosthese Finger and fixed bracket product.

Case study on implementation 4

Wrist correction bracket 3D mould is designed according to the wrist structure that human body needs to correct using Solid Works software first Type simultaneously exports stl file format;It reuses Cura software to be moved to most suitable position to model and analyze, it is ensured that model Normal absence gaps and omissions;Using the print head of 0.4mm diameter, 0.12mm is arranged in initial thickness, and normal print thickness is set as 0.18mm;Wall thickness is set as 0.8mm, and top layer and underlayer thickness are set as 0.9mm;Print temperature is set as 80 DEG C, platform temperature It is set as 60 DEG C;Normal print speed is set as 30mm/s, and speed when wherein printer is mobile is set as 120mm/s, bottom It is all set as 30mm/s with top layer speed, inner wall print speed is set as 25mm/s, and outer wall print speed is set as 30mm/s, returns Back speed degree is 30mm/s;Flow set, initial flow are set as 105%, and flow set when normal print is 100%, are not required to Support is built, 100% packed density is inputted;After the completion of parameter setting, gcode file is exported to SD card, and be inserted into printing In the specified deck of equipment;Printing device is checked before printer model and guarantees it all is good for use, loads onto hole hole plate, It is packed into wire rod, leveling platform detects and guarantees that printing device discharging is normal smooth and guarantee interior environment constant-temperature cooling device just Often, and interior environment constant-temperature cooling device setting temperature is 18 DEG C;It is entered in SD card and is selected by operation button and operating platform Injury of finger repairs strap and starts to print, and platform temperature is reduced to 56 DEG C when printing to the 5th layer, fills constant temperature cooling The temperature set is reduced to 12 DEG C and squish flow amount is adjusted to 100%, finally obtains printing product.It is removed using 60 DEG C of warm water Product and remove support and to cast trimming;Re-inspection product apparently whether there is problem, finally obtains qualified wrist and rectifys Positive rack product.

Application implementation case 5

The support bracket fastened printing manufacturing process of cervical vertebra injury repair:

Arm fixing sleeve 3D model is designed according to neck vertebral structure using Solid Works software first and is exported Stl file format;It reuses Cura software to be moved to most suitable position to model and analyze, it is ensured that model is not deposited normally In gaps and omissions;Using the print head of 0.4mm diameter, 0.12mm is arranged in initial thickness, and normal print thickness is set as 0.18mm;Wall thickness It is set as 1.2mm, top layer and underlayer thickness are set as 1.6mm;Print temperature is set as 85 DEG C, and platform temperature is set as 60 DEG C; Normal print speed is set as 30mm/s, and speed when wherein printer is mobile is set as 120mm/s, and bottom and top layer speed are all It is set as 30mm/s, inner wall print speed is set as 30mm/s, and outer wall print speed is set as 25mm/s, and rollback speed is 30mm/s;Flow set, initial flow are set as 110%, and flow set when normal print is 100%, do not need to build support, The packed density of input 60% selects the filling shape of hexagonal honeycomb shape;After the completion of parameter setting, export gcode file is arrived SD card, and be inserted into the specified deck of printing device;Printing device is checked before printer model and guarantees that it all goes well It can use, load onto hole hole plate, loading wire rod levels platform, detects and guarantees in the normal smoothness of printing device discharging and guarantee Environmental Incubator cooling device is normal, and interior environment constant-temperature cooling device setting temperature is 15 DEG C;It is flat by operation button and operation Platform, which enters in SD card, selects injury of finger reparation strap to start to print, and reduces platform temperature when printing to the 5th layer It is reduced to 10 DEG C to 55 DEG C, by the temperature of constant-temperature cooling device and squish flow amount is adjusted to 100%, finally obtains printing system Product.It removes product using 60 DEG C of warm water and removes and support and to cast trimming;Re-inspection product apparently whether there is problem, Finally obtain the fixed bracket product of cervical vertebra injury repair.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, of the invention Protection scope should be determined by the scope of protection defined in the claims.

Claims (3)

1. a kind of 3D printing process of polycaprolactone cryogenic material: it is characterized in that, specially following operating procedure: Step 1: obtaining model:
Layout design: according to the pattern of template first design template sketch or using 3D scanner or CT scanner to template object into Row comprehensive scanning obtains initial model;
Software design or modification: using professional mapping software according to the modelling of layout design progress profession or to 3D scanner The modification of details is carried out with the initial model that CT scanner scans;
Reduced model file: the model that design is completed or the model that modification is completed are exported with particular file format;
Step 2: processing model:
Software processing: obtained particular file format model is analyzed and processed using model treatment software;Main processing unit Point include that model is moved to suitable position, by software rotation function by any one direction in the three-dimensional of model or Angle more than one direction rotates to most suitable position, is zoomed in or out according to the requirement of size to model or by original Model size is constant;Model is analyzed using the model inspection function in model treatment software, inspection model is in design Whether defective or loophole;
Parameter setting: the nozzle bore used is 0.1~0.6mm;Thickness setting, initial thickness are set as 0.1~0.2mm, just Often printing thickness is set as 0.15~0.2mm;Wall thickness is set as 0.4~2.0mm, and top layer and underlayer thickness be set as 0.6~ 2.0mm;Print temperature is set as 60~120 DEG C, and platform temperature is set as 40~65 DEG C;Normal print speed is set as 20~ 80mm/s, speed when wherein printer is mobile are set as 100~200mm/s, and bottom and top layer speed are all set as 20- 60mm/s, inner wall print speed are set as 30~90mm/s, and outer wall print speed is set as 20~60mm/s, filling speed setting For 50~150mm/s, rollback speed is 20~60mm/s;Flow set, initial flow are set as 105~150%, normal print When flow set be 95~105%;All support, part support or without the one of them in support for supporting type selection;It beats The filling of stamp type, packed density are set as 10~100%, filling shape is filled for concentric arc filling, straight line, triangle is filled, One of quadrangle filling or hexagon filling;
Export is to SD card: the model file that processing analysis is completed and parameter setting is completed is led with the formatted file of gcode Out into specified SD card;
Step 3: preparing before printing:
Inspection printer: printer is connected with the mains and checks printer switch, operation button and screen and print head fan is No normal operation;
Insertion SD card: the SD card of the gcode format print file of importing is inserted into printer SD card and is specified in deck, and is passed through Operation button and operation interface are determined whether printer retrieves file in SD card;
It loads onto hole hole plate or glass plate: loading onto sizeable hole hole plate or glass plate on print platform, and use spiral shell Silk is fixed or special clip is fixed;
Leveling print platform: print platform is leveled using the self-level(l)ing device or system of printing device itself, and hand At the details that dynamic adjustment platform automatic horizontal control system is not adjusted in place;
It is fitted into low temperature wire rod: the suitable low temperature wire rod of line footpath is encased in printing device;
Printhead temperature: being warming up to 60~150 DEG C by operation button and operation interface by the detection smooth property of reactor effluent stream, and printing is flat Platform temperature is raised to 35~65 DEG C, opens extruder motor by operation button and operation interface and gets into wire rod, detection print head discharging The case where, until its discharging is continuous, smooth and normally;
It detects constant-temperature cooling device: opening interior environment constant-temperature cooling device in printing device, detect the printing environment of cryogenic thermostat, Follow-on test, until interior environment temperature can reach the temperature position that printing needs, finally confirmation printing device all goes well and can It is used with printing;
Step 4: printer model:
Selection mimeograph documents: by operation button and operation interface by step operation enter selection in SD card file content lead into Gcode format print file and click confirmation printing;
Environment temperature in setting: environment constant-temperature cooling device in opening adjusts the interior environment temperature of sealing to 5~15 DEG C;
The secondary setting of print parameters: secondary the setting of printing technology parameter is carried out for the physico-chemical property of cryogenic material or polycaprolactone It is fixed;After printing device printing starts, when product bottom prints to 3~8 layers, first by 3~15 DEG C of the temperature reduction of platform, then The temperature of constant-temperature cooling device is reduced by 1~10 DEG C, big squeeze out flow (105~150%) of starting are then adjusted to normal It squeezes out flow (100%);Finally obtain printing product;
Step 5: taking out printing product:
After the completion of model printing, interior environment constant-temperature cooling device is allowed to continue cooling 3~15min, makes printing product completely cooling fixed Interior environment cooling device is turned off after type;It unscrews fixed screw or takes away fixing, remove hole hole plate or glass plate and mould Type product;
Warm water takes product: one end of the hole hole plate with the moldings of hole hole plate being placed into warm water, warm water temperature It is 40~70 DEG C, the depth for immersing warm water is the thickness or 0.5~1.5mm of hole hole plate;
Shovel sled takes product: the week that modulus perching knife will be used to adhere in moldings with the moldings of glass plate or hole hole plate It encloses and shovels into 1~8mm, then slowly levered up model with modulus perching knife on glass plate or hole hole plate, finally take out moldings; Or slightly firmly pull the hole hole plate of plastics to slight curvature, allow moldings slowly from plastic composite hole hole It is peeled away on plate, then smoothly removes moldings again;
Step 6: product post-processes
It removes support: being set up when moldings is printed and be adhered to the backing material on moldings and remove completely;
Surface smooth treatment: after removing support, the fraction bonding scar processing left when removal is supported is smooth;By model All filoplumes of product surface, tartar etc. remove and handle equating;
Step 7: product is examined:
Visual examination: check surface flatness, whether be layered between layers or staggered floor, product with the presence or absence of certain defects, have Scratch etc. is not left;
Weight detecting: the quality for the product that printing is completed, the quality after comparison software slice generation, it is desirable that print completion are weighed The quality of product is not greater than or less than 5% of the quality after software slice generation;
Step 8: obtaining qualified product: product after post treatment and after the assay was approved, then obtains excellent or qualified model system Product to get arrive product finished product.
2. 3D printing process as described in claim 1: it is characterized by: the professional mapping software in step 1 is One of Solid Works software, 3DsMAX software, 123D Design software, UG software, Auto CAD software, it is described Particular file format is one of stl file format, obj file format, AMF file format, DAE file format.
3. 3D printing process as described in claim 1: it is characterized by: the model treatment software in step 2 is Cura One of software, Repetier-Host software or UP software.
CN201710423233.6A 2017-06-07 2017-06-07 A kind of 3D printing process of polycaprolactone cryogenic material CN107175812B (en)

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