CN209832629U - 3D printing nozzle - Google Patents
3D printing nozzle Download PDFInfo
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- CN209832629U CN209832629U CN201920083315.5U CN201920083315U CN209832629U CN 209832629 U CN209832629 U CN 209832629U CN 201920083315 U CN201920083315 U CN 201920083315U CN 209832629 U CN209832629 U CN 209832629U
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- liquid crystal
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Abstract
The utility model discloses a 3D printing nozzle, including the shell, still include the inner core, the inner core is located in the shell, the center pin of inner core with the center pin coincidence of shell, just the inner core is relative to the rotatable setting of shell. The inner core of the nozzle can be rotatably arranged relative to the shell, so that the molding pressure can be improved while the melt is subjected to mixing and plasticizing, and the raw material can be well converted from zero dimension to three dimension; when the nozzle is used for molding the liquid crystal polymer film, the problem of orientation of the liquid crystal polymer film on a 2D plane can be obviously improved, and the obtained liquid crystal polymer film has equivalent mechanical properties in all directions.
Description
Technical Field
The utility model relates to a material processing technology field especially relates to a 3D prints nozzle.
Background
Compared with Polyimide (PI) materials, the commercial thermotropic Liquid Crystal Polymer (LCP) has the advantages of better high-frequency performance, lower dielectric loss, good dimensional stability, low water absorption (less than 0.4%) and the like, but the film or the plate of the thermotropic Liquid Crystal Polymer (LCP) is very difficult to manufacture.
In a molten state, liquid crystal molecules of a liquid crystal polymer are easily aligned by shear force. In planar films or sheets, the orientation of the liquid crystal molecules causes significant anisotropy, and thus, the orientation of the liquid crystal molecules is to be avoided as much as possible during the formation of the LCP film.
There are many methods for changing the molecular orientation of LCP reported in foreign literature, such as adding a static mixing device inside the die head, and interlacing polymer molecules at a specific angle by means of multi-layer co-extrusion.
The traditional material reduction manufacturing technology generally adopts methods such as cutting, grinding, corrosion, melting and the like to obtain a product with a specific shape, and then processes the product by a later-stage die pressing and other methods, so that the manufacturing period is long, the process is complex, the product waste rate is high, and the cost is high. Under the background, the 3D printing rapid forming technology is gradually developed, and the method has advantages in forming complex structures, simplifying process procedures, improving product yield and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provided is a 3D printing nozzle which can remarkably improve the orientation problem of a liquid crystal polymer film.
In order to solve the technical problem, the utility model discloses a technical scheme be:
the 3D printing nozzle comprises an outer shell and an inner core, wherein the inner core is positioned in the outer shell, the central axis of the inner core is overlapped with the central axis of the outer shell, and the inner core is rotatably arranged relative to the outer shell.
Furthermore, a spiral line is arranged on the outer surface of the inner core.
Furthermore, an included angle between the spiral line and the central line of the inner core is 40-50 degrees.
Further, a heat insulation layer is arranged on the inner surface of the shell.
Furthermore, the heat insulation layer is made of aerogel ceramic composite materials, and the heat conductivity coefficient of the heat insulation layer is 0.018-0.025W/(m.K).
Furthermore, the size of a gap between the outer shell and the inner core is 0.1-0.5 mm.
The beneficial effects of the utility model reside in that: the inner core of the nozzle can be rotatably arranged relative to the shell, so that the molding pressure can be improved while the melt is subjected to mixing and plasticizing, and the raw material can be well converted from zero dimension to three dimension; when the nozzle is used for molding the liquid crystal polymer film, the problem of orientation of the liquid crystal polymer film on a 2D plane can be obviously improved, and the obtained liquid crystal polymer film has equivalent mechanical properties in all directions.
Drawings
Fig. 1 is a cross-sectional view of the 3D print nozzle of the first embodiment of the present invention.
Description of reference numerals:
1. a housing; 2. an inner core; 3. an insulating layer.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the inner core of the nozzle can be rotatably arranged relative to the shell, so that the molding pressure can be improved while the melt is subjected to mixing and plasticizing, and the conversion of the raw material from zero dimension to three dimension can be well realized.
Referring to fig. 1, a 3D printing nozzle includes an outer shell 1, and further includes an inner core 2, the inner core 2 is located in the outer shell 1, a central axis of the inner core 2 coincides with a central axis of the outer shell 1, and the inner core 2 is rotatably disposed relative to the outer shell 1.
From the above description, the beneficial effects of the present invention are: the inner core of the nozzle can be rotatably arranged relative to the shell, so that the molding pressure can be improved while the melt is subjected to mixing and plasticizing, and the conversion of the raw material from zero dimension to three dimension can be well realized.
Furthermore, a spiral line is arranged on the outer surface of the inner core 2.
Further, the included angle between the spiral line and the central line of the inner core 2 is 40-50 degrees.
From the above description, it can be seen that providing an inclined helix can improve the shearing effect on the melt.
Further, a heat insulation layer 3 is arranged on the inner surface of the outer shell 1.
As can be seen from the above description, the provision of the thermal insulation layer can reduce the heat loss and increase the temperature in the mold.
Furthermore, the heat insulation layer 3 is made of an aerogel ceramic composite material, and the heat conductivity coefficient of the heat insulation layer 3 is 0.018-0.025W/(m.K).
According to the description, the aerogel ceramic composite material is good in heat insulation effect and long in service life.
Furthermore, the size of the gap between the outer shell 1 and the inner core 2 is 0.1-0.5 mm.
From the above description, the size of the gap between the outer shell and the inner core can be adjusted as required.
Example one
Referring to fig. 1, a first embodiment of the present invention is:
A3D printing nozzle comprises an outer shell 1 and an inner core 2, wherein the inner core 2 is located in the outer shell 1, the central axis of the inner core 2 is coincident with the central axis of the outer shell 1, and the inner core 2 can be rotatably arranged relative to the outer shell 1, namely the inner core 2 can rotate around the central axis thereof. The outer surface of the inner core 2 is provided with a spiral line, preferably, the included angle between the spiral line and the central line of the inner core 2 is 40-50 degrees, and further preferably, the included angle between the spiral line and the central line of the inner core 2 is 45 degrees. Be equipped with insulating layer 3 on the internal surface of shell 1, preferably insulating layer 3's material is aerogel ceramic composite, and is specific, can adopt commercial aerogel heat insulation felt, and the model is CTB650, insulating layer 3's coefficient of heat conductivity is 0.018 ~ 0.025W/(m K). In this embodiment, the size of the gap between the outer shell 1 and the inner core 2 is 0.1-0.5 mm, and can be set as required.
Example two
The second embodiment of the utility model is a forming method of liquid crystal polymer film, according to first embodiment 3D print nozzle 3D print the shaping. The forming process of the liquid crystal polymer film specifically comprises the following steps:
1. the raw material for forming the liquid crystal polymer film is subjected to heat treatment. In the embodiment, the raw material is subjected to heat treatment under a vacuum condition, the heat treatment temperature is 140-160 ℃, and the heat treatment time is 4-18 h. The used raw materials can be LCP resin synthesized by copolymerizing multi-benzene ring rigid molecular monomers, introducing naphthalene rings into a molecular structure, using aliphatic chain segments in a molecular chain and the like, and the melting point of the resin is within the range of 250-380 ℃. In the present example, the density of the raw material used is 1.3 to 1.5g/cm3。
2. And (4) carrying out extrusion molding on the heat-treated raw material to obtain the wire rod. The extrusion molding can adopt a parallel three-screw extruder, and the diameter of an extrusion screw is about 20 mm; the fuse pipeline system can bear the high temperature of 300-450 ℃; the die orifice of the high-temperature casting die head is a diameter orifice with the diameter of 0.5-4 mm; the filtering device comprises a coarse filtering device and a fine filtering device, the aperture of the coarse filter is 15-40 mu m, and the aperture of the fine filter is controlled to be 3-10 mu m. Adjusting the temperature of an extruder and the temperature of a spool according to the melting point of the resin, controlling the temperature of a melt to be near the melting point +/-15 ℃, controlling the pressure of the spool to be more than 3MPa, and controlling the rotating speed of the extruder to be 80-200 revolutions per minute.
In this embodiment, the extrusion molding process specifically includes:
the first step is as follows: heating the extruder, the pipeline and the high-temperature die head to 10-30 ℃ lower than the melting point of the resin for cleaning the whole machine, wherein the used material is common resin with a lower melting point, and carbonization cannot occur at the temperature;
the second step is that: increasing the temperature of the extruder, the pipeline and the high-temperature die head to be about +/-15 ℃ of the melting point of the resin, discharging and adjusting the extrusion speed;
the third step: and cooling the extruded wire by cold water and then rolling.
The diameter of the wire rod obtained by the method can reach 0.5-2 mm, and the extruded wire rod is compact, uniform in plasticization and few in air holes.
3. And 3D printing and forming the wire to obtain the liquid crystal polymer film. In the embodiment, the 2D plane is used as a reference plane, the melt of the wire rod is extruded and then rapidly cooled and solidified on the substrate, and the liquid crystal polymer film without orientation difference in the three-dimensional direction is formed by countless printed material points, and the thickness of the liquid crystal polymer film is 20-100 μm.
4. And annealing the liquid crystal polymer film. And (3) carrying out annealing treatment in a high-temperature oven at 180-260 ℃ for 30-90 min, so that the transverse and longitudinal orientation of the material can be further improved, and the transverse and longitudinal mechanical properties tend to be balanced.
EXAMPLE III
The third embodiment of the present invention is a method for forming a liquid crystal polymer film, which is different from the second embodiment in that:
the temperature of the heat treatment is 150 ℃, and the time of the heat treatment is 12 h. The temperature of the annealing treatment was 220 ℃ and the time was 60 min. The thickness of the resulting liquid-crystalline polymer film was 25 μm.
Example four
The fourth embodiment of the present invention is a method for forming a liquid crystal polymer film, which is different from the second embodiment in that:
the temperature of the heat treatment is 140 ℃, and the time of the heat treatment is 18 h. The temperature of the annealing treatment is 180 ℃ and the time is 90 min. The thickness of the resulting liquid-crystalline polymer film was 100. mu.m.
EXAMPLE five
The fifth embodiment of the present invention is a method for forming a liquid crystal polymer film, which is different from the second embodiment in that:
the temperature of the heat treatment is 160 ℃, and the time of the heat treatment is 4 h. The temperature of the annealing treatment is 260 ℃ and the time is 30 min. The thickness of the resulting liquid-crystalline polymer film was 20 μm.
The liquid crystal polymer films obtained in examples three to five were subjected to mechanical property tests, and the test results are shown in table 1. The bending resistance times test conditions are as follows: r-0.38 mm, 175rpm/min, ± 135 °, load 500 g. When the bending resistance test is carried out, the MD direction is vertical to the rolling direction, and the TD direction is parallel to the rolling direction.
TABLE 1 liquid-crystalline polymer film mechanical Property test results
As can be seen from Table 1, the liquid crystal polymer film prepared by the present invention has equivalent mechanical properties in MD and TD directions.
To sum up, the utility model provides a pair of 3D prints nozzle, use during nozzle shaping liquid crystal polymer film, can show the orientation problem of improving liquid crystal polymer film on the 2D plane, the liquid crystal polymer film that makes obtain is equivalent at the ascending mechanical properties of all directions.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (6)
1. The 3D printing nozzle comprises an outer shell and is characterized by further comprising an inner core, wherein the inner core is located in the outer shell, the central axis of the inner core is overlapped with the central axis of the outer shell, and the inner core is rotatably arranged relative to the outer shell.
2. The 3D printing nozzle as defined in claim 1 wherein the outer surface of the inner core is provided with a spiral.
3. The 3D printing nozzle according to claim 2, wherein the helix angle is 40-50 ° to the center line of the inner core.
4. The 3D printing nozzle as defined in claim 1 wherein the inner surface of the housing is provided with a thermal insulation layer.
5. The 3D printing nozzle as claimed in claim 4, wherein the thermal insulation layer is made of aerogel ceramic composite material, and the thermal conductivity of the thermal insulation layer is 0.018-0.025W/(m-K).
6. The 3D printing nozzle of claim 1, wherein a gap between the outer shell and the inner core is 0.1-0.5 mm in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083315.5U CN209832629U (en) | 2019-01-16 | 2019-01-16 | 3D printing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083315.5U CN209832629U (en) | 2019-01-16 | 2019-01-16 | 3D printing nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN209832629U true CN209832629U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920083315.5U Active CN209832629U (en) | 2019-01-16 | 2019-01-16 | 3D printing nozzle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109648850A (en) * | 2019-01-16 | 2019-04-19 | 深圳市信维通信股份有限公司 | A kind of forming method of 3D printing nozzle and liquid crystal polymer film |
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2019
- 2019-01-16 CN CN201920083315.5U patent/CN209832629U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109648850A (en) * | 2019-01-16 | 2019-04-19 | 深圳市信维通信股份有限公司 | A kind of forming method of 3D printing nozzle and liquid crystal polymer film |
| CN109648850B (en) * | 2019-01-16 | 2023-10-17 | 深圳市信维通信股份有限公司 | 3D printing nozzle and forming method of liquid crystal polymer film |
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