CN108705753A - A kind of high precision method of polylactic acid 3D printing wire rod - Google Patents
A kind of high precision method of polylactic acid 3D printing wire rod Download PDFInfo
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- CN108705753A CN108705753A CN201810589003.1A CN201810589003A CN108705753A CN 108705753 A CN108705753 A CN 108705753A CN 201810589003 A CN201810589003 A CN 201810589003A CN 108705753 A CN108705753 A CN 108705753A
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- Prior art keywords
- polylactic acid
- wire rod
- printing wire
- high precision
- precision method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92209—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
The invention discloses a kind of high precision methods of polylactic acid 3D printing wire rod, include the following steps：(1) it dries：Dry polylactic acid；(2) it squeezes out：Polylactic acid after drying is added to single screw extrusion machine and carries out plasticizing extrusion processing；(3) cooling：The polylactic acid after squeezing out processing will be plasticized through step (2) and pass through two sections of coolings, first segment cooling temperature is 50-53 DEG C, and second segment cooling temperature is 5-28 DEG C, obtains polylactic acid 3D printing wire rod.Invention significantly improves the machining accuracy of polylactic acid 3D printing wire rod, and it is at low cost, and income is high.
Description
Technical field
The invention belongs to 3D printing field of material technology, and in particular to a kind of high precision of polylactic acid 3D printing wire rod
Method.
Background technology
Polylactic acid (polylactic acid, PLA) is also referred to as polylactide (polylactide), is biodegradable
Plastics belong to polyester family.Polylactic acid is the polymer obtained for main polymerizable raw material with lactic acid, and raw material sources are abundant and can
With regeneration, mainly with corn, cassava etc. for raw material.The production process of polylactic acid is pollution-free, and product can be biodegradable, real
Cycle in present nature, therefore be ideal Green Polymer Material.
The processing temperature of polylactic acid is 170~230 DEG C, due to good solvent resistance, can use various ways into
Row processing, such as extruding, spinning, biaxial stretch-formed, injection-blow molding.The product made of polylactic acid is other than energy is biodegradable, life
Object compatibility, glossiness, the transparency, feel and heat resistance are all relatively good, also have certain fungus resistance, anti-flammability and uvioresistant
Property, therefore purposes is very extensive, can be used as packaging material, fiber and non-woven fabric etc., and it is (underwear, outer to be currently used primarily in clothes
Clothing), various industries (such as building, agricultural, forestry, paper-making industry), medical and health industry also largely use 3D printing consumptive material, share
60%-70% can be accounted for.
As 3D printing is more and more universal, 3D printing material also develops into multiple material from homogenous material, and wherein PLA is 3D
Utilization rate is highest in printing consumables, and share can account for 60%-70%, and user is also more next to the required precision of 3D printing product
Higher, at present all there is the phenomenon that unstable line footpath dimensional accuracy and bigger error in PLA consumptive materials on the market, when printing use
Printer plug and the non-uniform problem of feeding can occur, by prolonged research.The present invention provides one kind to carry
The method of high 3D printing consumptive material PLA (polylactic acid) wire production formed precision, can effectively ensure the precision of printed product, symbol
Close the requirements at the higher level in market.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of high precision sides of polylactic acid 3D printing wire rod
Method.
The present invention uses following technical scheme：
A kind of high precision method of polylactic acid 3D printing wire rod, includes the following steps：
(1) it dries：Dry polylactic acid；
(2) it squeezes out：Polylactic acid after drying is added to single screw extrusion machine and carries out plasticizing extrusion processing；
(3) cooling：The polylactic acid after squeezing out processing will be plasticized through step (2) and pass through two sections of coolings, first segment cooling temperature
It it is 50-53 DEG C so that temperature of the polylactic acid in first segment cooling is strict controlled in 50-53 DEG C, can be monitored and be filled with temperature in use
It sets and is monitored in real time, if first segment cooling temperature is less than 50 DEG C, wire rod can be caused to cool down suddenly, cause wires contract, led
It causes gauge or diameter of wire uneven, if first segment cooling temperature will appear cooling higher than 55 DEG C not in time, gauge or diameter of wire is caused to be squeezed
Pressure and stretcher strain；
Second segment cooling temperature is 5-28 DEG C, such as 10-25 DEG C, 15-20 DEG C, obtains polylactic acid 3D printing wire rod.
Polylactic acid (PLA) raw material manufacturer is 110 types of the biotech inc domestic brand Hai Zheng, Huo Zhemei
Company of state NatureWorks4032D.
Further, drying temperature described in step (1) is 78-83 DEG C, and drying time can be 1-5 hours, preferably 3-5
Hour.
Further, the temperature of Single screw extrusion machined region described in step (2) is 180-215 DEG C, further
Ground, the temperature of Single screw extrusion machined region described in step (2) are 180-195 DEG C.Further, institute in step (2)
The machining area temperature for stating single screw extrusion machine is：One 182-185 DEG C of area, two 185-190 DEG C of areas, three 190-195 DEG C of areas, 4th area
190-195 DEG C, five 180-190 DEG C of areas, six 180-185 DEG C of areas.
Further, the extrusion yield of single screw extrusion machine described in step (2) is 10-20KG per hour.
Further, the polylactic acid compact dimensions specification that step (2) plasticizing squeezes out after processing is set as 1.7-3.5 millimeters,
Such as 1.75-3.00 millimeters.
Further, the time of first segment cooling cannot be less than 2.5 seconds, such as 2.5 seconds to 3 seconds, and 4 seconds to 8 seconds, 10 seconds extremely
15 seconds.
Second segment cooling can ensure that wire rod is fully molded, and will not be deformed, since PLA shaping speeds are fast, logical
It shapes when crossing second segment cooling bath, is stored finally by storage rack completely, obtain high-precision polylactic acid 3D printing wire rod.
Further, the cooling step uses water cooling plant or air cooling equipment.
Further, the mouth mold bore of the single screw extrusion machine is 3-4 millimeters, and screw diameter is 35 millimeters or 45 millis
Rice.
Further, it is also detected step after obtaining the polylactic acid 3D printing wire rod, with laser diameter measuring instrument or number
Slide calliper rule detect gauge or diameter of wire, and the positive negative error of diameter is no more than 0.010 millimeter, for example, compared with target set point, actual production
Gauge or diameter of wire differed with target set point be no more than 0.010 millimeter.For example, the target set point of gauge or diameter of wire is 1.750 millis
Rice, then the gauge or diameter of wire of actual production is 1.740-1.760 millimeters.
Compared with the prior art, the advantages of the present invention are as follows：In the case of no increase cost, the present invention significantly improves
The precision and stability of polylactic acid 3D printing wire rod processing dimension, improve PLA material used in 3D printing field it is qualified
Rate, precision qualification rate are 100%, and entire production method is very simple, can be low without complicated equipment and operation
High yield is obtained under conditions of cost, suitable for the high-precision polylactic acid 3D printing wire rod of large-scale production.
Specific implementation mode
In order to preferably explain the present invention, it is described further in conjunction with following specific examples, but the present invention is unlimited
In specific embodiment.
Embodiment 1
A kind of high precision method of polylactic acid 3D printing wire rod, includes the following steps：
(1) it dries：Polylactic acid is dried at 80 DEG C, polylactic acid (PLA) raw material uses the biotech inc Hai Zheng
110 types；
(2) it squeezes out：Polylactic acid after drying is added to single screw extrusion machine and carries out plasticizing extrusion processing, the single screw rod
The machining area temperature of extruder is：One 182-185 DEG C of area, two 185-190 DEG C of areas, three 190-195 DEG C of areas, four area 190-195
DEG C, five 180-190 DEG C of areas, six 180-185 DEG C of areas；The extrusion yield of single screw extrusion machine is that 15KG, mouth mold bore are 3 per hour
Millimeter.
(3) cooling：The polylactic acid after squeezing out processing will be plasticized through step (2) and pass through two sections of coolings, first segment cooling temperature
It it is 51 DEG C so that temperature of the polylactic acid in first segment cooling is strict controlled in 51 DEG C, can be carried out with temperature in use monitoring device
The time of real time monitoring, first segment cooling is 3 seconds；
Second segment cooling temperature is 20 DEG C, is finally drawn to storage rack storage, obtains high-precision polylactic acid 3D printing line
Material.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.740-1.760 millimeters, and positive negative error is 0.010 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.010 millimeter, is closed
Lattice rate 100%.
Embodiment 2
A kind of high precision method of polylactic acid 3D printing wire rod, includes the following steps：
(1) it dries：Polylactic acid is dried at 78-83 DEG C, polylactic acid (PLA) raw material uses u s company
No. NatureWorks4032D；
(2) it squeezes out：Polylactic acid after drying is added to single screw extrusion machine and carries out plasticizing extrusion processing, the single screw rod
The machining area temperature of extruder is：One 182-185 DEG C of area, two 185-190 DEG C of areas, three 190-195 DEG C of areas, four area 190-195
DEG C, five 180-190 DEG C of areas, six 180-185 DEG C of areas；The extrusion yield of single screw extrusion machine is that 15KG, mouth mold bore are 3 per hour
Millimeter.
(3) cooling：The polylactic acid after squeezing out processing will be plasticized through step (2) and pass through two sections of coolings, first segment cooling temperature
It it is 53 DEG C so that temperature of the polylactic acid in first segment cooling is strict controlled in 53 DEG C, can be carried out with temperature in use monitoring device
The time of real time monitoring, first segment cooling is 2.8 seconds；
Second segment cooling temperature is 15 DEG C, is finally drawn to storage rack storage, obtains high-precision polylactic acid 3D printing line
Material.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.740-1.760 millimeters, and positive negative error is 0.010 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.010 millimeter, is closed
Lattice rate 100%.
Embodiment 3
A kind of high precision method of polylactic acid 3D printing wire rod, includes the following steps：
(1) it dries：Polylactic acid is dried at 78-83 DEG C, polylactic acid (PLA) raw material is using the limited public affairs of the positive biotechnology share in sea
110 types of department；
(2) it squeezes out：Polylactic acid after drying is added to single screw extrusion machine and carries out plasticizing extrusion processing, the single screw rod
The machining area temperature of extruder is：One 182-185 DEG C of area, two 185-190 DEG C of areas, three 190-195 DEG C of areas, four area 190-195
DEG C, five 180-190 DEG C of areas, six 180-185 DEG C of areas；The extrusion yield of single screw extrusion machine is that 15KG, mouth mold bore are 3 per hour
Millimeter.
(3) cooling：The polylactic acid after squeezing out processing will be plasticized through step (2) and pass through two sections of coolings, first segment cooling temperature
It it is 52 DEG C so that temperature of the polylactic acid in first segment cooling is strict controlled in 52 DEG C, can be carried out with temperature in use monitoring device
The time of real time monitoring, first segment cooling is 3.5 seconds；
Second segment cooling temperature is 18 DEG C, is finally drawn to storage rack storage, obtains high-precision polylactic acid 3D printing line
Material.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.740-1.760 millimeters, and positive negative error is 0.010 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.010 millimeter, is closed
Lattice rate 100%.
Comparative example 1
A kind of high precision method of polylactic acid 3D printing wire rod, each step is same as Example 1, in addition to step (3)
In first segment cooling temperature control other than 47 DEG C, remaining is all identical, obtains polylactic acid 3D printing wire rod.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.700-1.800 millimeters, and positive negative error is 0.050 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.050 millimeter, no
Meet high-precision requirement.
Comparative example 2
A kind of high precision method of polylactic acid 3D printing wire rod, each step is same as Example 1, in addition to step (3)
In first segment cooling temperature control other than 57 DEG C, remaining is all identical, obtains polylactic acid 3D printing wire rod.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.670-1.830 millimeters, and positive negative error is 0.080 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.080 millimeter, no
Meet high-precision requirement.
Comparative example 3
A kind of high precision method of polylactic acid 3D printing wire rod, each step is same as Example 1, in addition to step (3)
In first segment cooling temperature control other than 49 DEG C, remaining is all identical, obtains polylactic acid 3D printing wire rod.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.720-1.780 millimeters, and positive negative error is 0.030 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.030 millimeter, no
Meet high-precision requirement.
Comparative example 4
A kind of high precision method of polylactic acid 3D printing wire rod, each step is same as Example 1, in addition to step (3)
In first segment cooling temperature control other than 54 DEG C, remaining is all identical, obtains polylactic acid 3D printing wire rod.
Preset high-precision polylactic acid 3D printing wire forming dimensions is 1.750 millimeters.Use laser diameter measurement
Instrument carries out whole detection to finished product, and the size of actual gauge or diameter of wire is 1.720-1.780 millimeters, and positive negative error is 0.030 milli
Rice；In addition, with digital calipers to being often rolled into 50 meters of detections of product sampling, the positive negative error of size of gauge or diameter of wire is 0.030 millimeter, no
Meet high-precision requirement.
Above is only a specific embodiment of the present invention, it is not intended to limit the scope of the invention, every utilization
The equivalent transformation that the present invention makees is applied directly or indirectly in other relevant technical fields, is similarly included in the present invention's
Among scope of patent protection.
Claims (10)
1. a kind of high precision method of polylactic acid 3D printing wire rod, which is characterized in that include the following steps：
(1) it dries：Dry polylactic acid；
(2) it squeezes out：Polylactic acid after drying is added to single screw extrusion machine and carries out plasticizing extrusion processing；
(3) cooling：The polylactic acid after squeezing out processing will be plasticized through step (2) and pass through two sections of coolings, first segment cooling temperature is 50-
53 DEG C, second segment cooling temperature is 5-28 DEG C, obtains polylactic acid 3D printing wire rod.
2. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that step (1)
Described in the temperature dried be 78-83 DEG C.
3. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that step (2)
Described in single screw extrusion machine machining area temperature be 180-215 DEG C.
4. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that step (2)
Described in the machining area temperature of single screw extrusion machine be：One 182-185 DEG C of area, two 185-190 DEG C of areas, three 190-195 DEG C of areas,
Four 190-195 DEG C of areas, five 180-190 DEG C of areas, six 180-185 DEG C of areas.
5. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that step (2)
Described in the extrusion yield of single screw extrusion machine be 10-20KG per hour.
6. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that step (2)
The polylactic acid compact dimensions specification that plasticizing squeezes out after processing is set as 1.7-3.5 millimeters.
7. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that first segment is cold
But time is no less than 2.5 seconds.
8. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that the cooling
Step uses water cooling plant or air cooling equipment.
9. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that the list spiral shell
The mouth mold bore of bar extruder is 3-4 millimeters, and screw diameter is 35 millimeters or 45 millimeters.
10. the high precision method of polylactic acid 3D printing wire rod according to claim 1, which is characterized in that obtain institute
It is also detected step after stating polylactic acid 3D printing wire rod, gauge or diameter of wire is detected with laser diameter measuring instrument or digital calipers.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111605220A (en) * | 2020-05-29 | 2020-09-01 | 浙江海正生物材料股份有限公司 | Preparation method of polylactic acid 3D printing wire |
| CN112606352A (en) * | 2020-11-20 | 2021-04-06 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Preparation method of color-mixed 3D printing wire |
| CN114290632A (en) * | 2021-12-09 | 2022-04-08 | 江南大学 | Preparation method of fused deposition modeling 3D printing heat-resistant stereo polylactic acid wire rod |
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| CN114290632A (en) * | 2021-12-09 | 2022-04-08 | 江南大学 | Preparation method of fused deposition modeling 3D printing heat-resistant stereo polylactic acid wire rod |
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Application publication date: 20181026 |