CN220593974U - Airflow cooling device and polyether ketone 3D printing monofilament production system using same - Google Patents
Airflow cooling device and polyether ketone 3D printing monofilament production system using same Download PDFInfo
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- CN220593974U CN220593974U CN202321684756.3U CN202321684756U CN220593974U CN 220593974 U CN220593974 U CN 220593974U CN 202321684756 U CN202321684756 U CN 202321684756U CN 220593974 U CN220593974 U CN 220593974U
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- 238000001816 cooling Methods 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000010146 3D printing Methods 0.000 title claims abstract description 17
- 229920001643 poly(ether ketone) Polymers 0.000 title claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims abstract description 43
- 230000007704 transition Effects 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 229920001652 poly(etherketoneketone) Polymers 0.000 claims description 19
- 239000000155 melt Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 4
- 239000004696 Poly ether ether ketone Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002530 polyetherether ketone Polymers 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The utility model discloses an air flow cooling device and a polyether ketone 3D printing monofilament production system using the same, wherein the air flow cooling device comprises: the extrusion channel is transversely arranged; the transition channel is transversely arranged, the input end of the transition channel is communicated with the output end of the extrusion channel, the input end of the transition channel surrounds the output end of the extrusion channel, slits are formed between the two ends at intervals, and the upper gaps of the slits are larger than the lower gaps of the slits; the hot air mechanism conveys hot air flow to the transition channel through the slit; the cooling channel is transversely arranged and is communicated with the output end of the transition channel; the cooling rate of the monofilaments is greatly reduced by a hot air cooling mode, the crystallinity of the monofilaments is effectively improved, and the heat shrinkage rate of the monofilaments is reduced; by utilizing the characteristic that the gap above the slit is larger than the gap below the slit, certain buoyancy is generated on the monofilament, and the stability of the monofilament production and the evenness of the filament are further improved.
Description
Technical Field
The utility model relates to 3D printing monofilament production equipment, in particular to an airflow cooling device and a polyether ketone 3D printing monofilament production system using the airflow cooling device.
Background
Polyetherketoneketone (PEKK) is an excellent metal substitute material that can be used in extremely severe environments, is another thermoplastic resin of special structure developed subsequent to Polyetheretherketone (PEEK), and has more excellent high temperature resistance, abrasion resistance, and processability than PEEK. The polyether ketone (PEKK) has excellent performances of high strength, high chemical resistance, high continuous use temperature and the like, can be used as a high-temperature resistant structural material and an electric insulating material, and can be compounded with glass fibers or carbon fibers to prepare a reinforcing material. PEKK can be used for producing products such as high-grade non-stick pan coating, carbon fiber thermoplastic composite materials, 3D printing wires and powder, injection molding products, extruded plate bar profiles, electronic films and the like.
Generally, the production process flow of the 3D printed monofilament is as follows: raw material drying, screw extrusion, water cooling, diameter detection and winding. The process is not problematic in the production of materials such as PA6, PLA, PET, etc. for general engineering plastics. However, when PEKK is used as a raw material, and 3D printing of monofilaments is performed by producing PEKK according to the above-described process, the filaments are severely bent and difficult to wind smoothly. Meanwhile, the crystallinity of the PEKK monofilament produced by adopting the process is low, and the thermal shrinkage rate of the monofilament is high. This is due to the relatively high melt temperatures during PEKK processing, typically above 340 c, and due to the relatively slow crystallization rate of PEKK. After the PEKK melt is extruded from the extruder, water cooling is used, and the cooling rate is too fast. Too fast a cooling rate results in insufficient relaxation of the molecular chains, large filament shrinkage and uneven shrinkage, and thus PEKK filaments are severely curved. Meanwhile, the molecular chains can not crystallize due to the excessively fast cooling rate, so that the heat shrinkage rate of the monofilaments is large, the heat stability is poor, and the requirements of the 3D printing process on materials are difficult to meet.
Disclosure of Invention
The present utility model aims to solve at least one of the above-mentioned technical problems in the related art to some extent. To this end, the utility model proposes an air flow cooling device.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model also provides a polyether ketone 3D printing monofilament production system with the airflow cooling device.
An air flow cooling device according to an embodiment of the first aspect of the present utility model includes:
the extrusion channel is transversely arranged;
the transition channel is transversely arranged, the input end of the transition channel is communicated with the output end of the extrusion channel, the input end of the transition channel surrounds the output end of the extrusion channel, slits are formed between the input end of the transition channel and the output end of the extrusion channel at intervals, and the upper gaps of the slits are larger than the lower gaps of the slits;
the hot air mechanism is used for conveying hot air flow to the transition channel through the slit;
and the cooling channel is transversely arranged and is communicated with the output end of the transition channel.
The airflow cooling device provided by the embodiment of the utility model has at least the following beneficial effects: the cooling rate of the monofilaments is greatly reduced by a hot air cooling mode, the crystallinity of the monofilaments is effectively improved, and the heat shrinkage rate of the monofilaments is reduced; by utilizing the characteristic that the gap above the slit is larger than the gap below the slit, certain buoyancy is generated on the monofilament, and the stability of the monofilament production and the evenness of the filament are further improved.
According to some embodiments of the utility model, the hot air mechanism comprises a cylinder, the inside of the cylinder is divided into a surge chamber and an air storage chamber, the surge chamber is annularly arranged, the surge chamber is provided with an air inlet, the chamber wall of the surge chamber surrounds the central axis of the cylinder to form the transition channel, the surge chamber is communicated with the air storage chamber, and the air storage chamber surrounds the transition channel and is communicated with the slit.
According to some embodiments of the utility model, the pressure stabilizing chamber and the air storage chamber are communicated through a communication port, the position of the communication port is arranged around the slit, and the ventilation direction of the communication port is parallel to the slit.
According to some embodiments of the utility model, the hot air mechanism further comprises an air compressor in communication with the air intake and a heating member that heats the air compressed by the air compressor.
According to some embodiments of the utility model, the cooling channel is constituted by a hollow cooling tube of long tubular shape.
According to the embodiment of the second aspect of the utility model, the production system of the polyether-ketone 3D printing monofilaments comprises a single screw extrusion device, a filtering device, a die head, an airflow cooling device, a diameter detection device and a winding device which are sequentially arranged, wherein the single screw extrusion device extrudes a melt, the melt is filtered by the filtering device and forms a melt trickle through the die head, the melt trickle enters the airflow cooling device to be cooled and solidified to form monofilaments, and the monofilaments enter the winding device to be wound after being measured by the diameter detection device.
The polyether ketone 3D printing monofilament production system provided by the embodiment of the utility model has at least the following beneficial effects: under the cooling effect of the airflow cooling device, the tension stability in the production process of the monofilaments is ensured, the crystallinity of the monofilaments is improved, and the quality of finished products of the polyether-ketone monofilaments is effectively ensured.
According to some embodiments of the utility model, the single screw extrusion device is provided with a plurality of temperature control areas along the extrusion direction, and the temperature of each temperature control area is gradually decreased along the extrusion direction of the single screw extrusion device within the range of 250-380 ℃.
According to some embodiments of the utility model, the filter device comprises a filter screen with a filter pore size of 15um to 30um.
According to some embodiments of the utility model, the die has an exit orifice with a pore size in the range of 0.5mm to 3mm, and the exit orifice has an axial length and pore size ratio greater than 4.
According to some embodiments of the utility model, the inlet air temperature of the hot air mechanism is 60 ℃ to 120 ℃.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of the internal structure of an air flow cooling device;
FIG. 2 is a cross-sectional view in the direction A of FIG. 1;
FIG. 3 is a schematic diagram of a polyetherketoneketone 3D printing monofilament production system.
Reference numerals: an air flow cooling device 001; extrusion channel 100; a transition passage 200; a slit 210; a hot air mechanism 300; barrel 310; a surge chamber 320; an air inlet 321; a communication port 322; an air reservoir 330; a cooling channel 400; a hollow cooling tube 410; a single screw extrusion device 500; a filtering device 600; a die 700; diameter detection means 800; winding device 900.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
The utility model relates to an air flow cooling device, which comprises an extrusion channel 100, a transition channel 200, a hot air mechanism 300 and a cooling channel 400.
As shown in fig. 1, the extrusion passage 100, the transition passage 200, and the cooling air duct are horizontally disposed horizontally in this order from right to left in the illustrated direction and communicate with each other. The left end of extrusion channel 100 serves as the output end, the right end of transition channel 200 serves as the input end, the left end of extrusion channel 100 extends into the right end of transition channel 200, and the right end of transition channel 200 surrounds the left end of extrusion channel 100, with a space between the inner wall of the right end of transition channel 200 and the outer wall of the left end of extrusion channel 100, which forms slit 210. Wherein, in space, the slit 210 is ring-shaped, and an upper gap size of the slit 210 is larger than a lower gap size of the slit 210. The hot air mechanism 300 can generate an air flow with a certain temperature and then deliver the air flow to the slit 210.
In practical use, the air flow cooling device is used in the process of extruding the polyether ketone monofilaments. During production, a melt stream of polyetherketoneketone enters extrusion channel 100 and is transported along extrusion channel 100 to transition channel 200 and cooling channel 400. The hot air mechanism 300 is activated to deliver a hot air flow to the slot 210 that is at a temperature lower than the temperature of the melt stream. The air flow is ejected into the transition passage 200 after passing through the slit 210 to form a high-speed cooling air flow. The melt stream is cooled by the high velocity cooling air flow and gradually solidifies along transition channel 200 and cooling channel 400 to form filaments that are forced to move horizontally by the friction of the air flow. Meanwhile, since the upper gap of the slit 210 is larger than the lower gap, the upper gas flow rate in the transition passage 200 and the cooling passage 400 is higher than the lower gas flow rate. According to the Bernoulli theorem, the upper hydrostatic pressure is low and the lower hydrostatic pressure is high, and the filaments are also subjected to an upward force.
The cooling rate of the monofilaments is greatly reduced by a hot air cooling mode, so that the melt of the polyether ketone can form crystals in a molecular chain in a cooling process, the crystallinity of the monofilaments is effectively improved, and the heat shrinkage rate of the monofilaments is reduced. Meanwhile, the monofilaments are uniformly cooled, no bending is formed, and smooth production is ensured. The high-speed air flow can generate stronger friction force on the monofilaments, so that the stability of tension in the production process of the monofilaments is effectively ensured, and the influence of tension change on the diameters of the monofilaments is reduced. By utilizing the characteristic that the gap above the slit 210 is larger than the gap below, the static air pressure in the cooling channel 400 is characterized by high below and low above, and a certain buoyancy force (upward force) is generated on the monofilaments, so that the stability of the production of the monofilaments and the evenness of the filaments are further improved.
In some embodiments of the present utility model, hot air mechanism 300 includes a cylinder 310, and cylinder 310 may be configured in a cylindrical shape. The cylinder 310 is divided into a surge tank 320 and a gas storage chamber 330, and the surge tank 320 and the gas storage chamber 330 communicate with each other. The pressure stabilizing chamber 320 is provided with an air inlet 321, and the air inlet 321 is connected with external hot air supply equipment. The surge tank 320 forms an annular chamber around the central axis of the cylinder 310 in the cylinder 310, and the chamber wall of the surge tank 320 against the central axis of the cylinder 310 forms the transition passage 200 in the cylinder 310. The air reservoir 330 communicates with the slit 210. The hot air flows into the pressure stabilizing chamber 320 to stabilize the pressure of the air flow, flows into the air storage chamber 330, and is conveyed to the slit 210 through the air storage chamber 330, so that the air flow is prevented from being directly conveyed to the slit 210 to form turbulent flow in the transition channel 200 and the cooling channel 400. Meanwhile, after the hot air flows into the pressure stabilizing chamber 320, a certain temperature control effect is provided for the chamber wall of the pressure stabilizing chamber 320, which is equivalent to controlling the temperature of the transition channel 200, and the molten material trickle contacts with the inner wall of the transition channel 200 (i.e. the chamber wall of the pressure stabilizing chamber 320) after entering the transition channel 200, so that the instant over-rapid temperature reduction of the molten material trickle contacting with the inner wall of the transition channel 200 can be avoided. The air storage chamber 330 is located at the right side of the pressure stabilizing chamber 320, the air storage chamber 330 is disposed around the extrusion channel 100, and the hot air flows into the air storage chamber 330 to control the temperature of the outer wall of the extrusion channel 100. In this embodiment, a communication port 322 is formed in a wall of the plenum 320 and the air reservoir 330, which is separated from each other, and the communication port 322 communicates the plenum 320 and the air reservoir 330 with each other. In space, the position of the communication port 322 surrounds the slit 210, as shown in fig. 2, the communication port 322 is circular. The ventilation direction of the communication port 322 is parallel to the ventilation direction of the slit 210, and the ventilation is performed along the horizontal direction, so that the hot air flow is stable after entering the air storage chamber 330 from the pressure stabilizing chamber 320 through the communication port 322, and the hot air flow is prevented from directly impacting the slit 210.
In some embodiments of the present utility model, the hot air mechanism 300 further includes an air compressor and a heating member (not shown). The air compressor is communicated with the air inlet 321, the heating component heats the air compressed by the air compressor, and the heated compressed air is conveyed into the pressure stabilizing chamber 320. The compressed air has a certain air pressure, and can form a high-speed air flow after passing through the slit 210.
In some embodiments of the present utility model, the cooling channel 400 is formed by an elongated tubular hollow cooling tube 410. A portion of the heat of the cooling channel 400 is dissipated outwardly through the wall of the hollow cooling tube 410. The filaments and air flow gradually cool as they are conveyed through the hollow cooling tube 410.
As shown in fig. 3, the present utility model also relates to a polyetherketoneketone 3D printing monofilament production system, which comprises a single screw extrusion device 500, a filtering device 600, a die head 700, an air-flow cooling device 001, a diameter detection device 800 and a winding device 900, which are sequentially arranged from right to left in the direction of illustration. The polyetherketoneketone starting material is melted and then extruded through a single screw extruder 500. The melt is filtered by the filtering device 600, and the filtered melt passes through the die 700 to form a melt stream. The melt stream enters a gas flow cooling device 001 for gas cooling and solidification to form monofilaments. The filaments are discharged from the cooling passage 400 and measured by the diameter measuring device 800, and the diameter and the dimensional fluctuation of the filaments are measured. Qualified monofilaments enter the winding device 900 to be wound to form a final product. Under the cooling effect of the airflow cooling device 001, the tension stability in the production process of the monofilaments is ensured, the crystallinity of the monofilaments is improved, and the quality of finished products of the polyether-ketone monofilaments is effectively ensured.
In some embodiments of the present utility model, the single screw extrusion device 500 is provided with a plurality of temperature control zones along the extrusion direction, and the temperature of each temperature control zone is gradually decreased along the extrusion direction of the single screw extrusion device 500 within the range of 250-380 ℃. In this embodiment, the single screw extrusion device 500 is divided into six temperature control areas, and the temperature control ranges of the temperature control areas are from left to right: zone 1: 250-300 ℃, zone 2: 290-320 ℃,3 zone: 300-340 ℃, 4 zone: 320-360 ℃, 5 zone: 320-380 ℃, 6 regions: 320-380 ℃.
Wherein the filtering device 600 comprises a sieve (not shown in the figures). The filtering pore diameter of the filtering net is 15-30 um, and particles which are not melted in the melt and have overlarge particle size are separated and sieved out.
Die 700 is provided with an orifice (not shown) having a diameter ranging from 0.5mm to 3mm and an axial length and an aperture ratio of greater than 4, and controls the diameter range of the output melt stream.
The air inlet temperature range of the hot air mechanism 300 is controlled to be 60-120 ℃, so that the cooling rate during the molding of the monofilaments is satisfied.
In the description of the present specification, reference to the term "some particular embodiments" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An air flow cooling device, comprising:
-an extrusion channel (100), said extrusion channel (100) being arranged laterally;
the transition channel (200) is transversely arranged, the input end of the transition channel (200) is communicated with the output end of the extrusion channel (100), the input end of the transition channel (200) surrounds the output end of the extrusion channel (100), a slit (210) is formed between the input end of the transition channel and the output end of the extrusion channel, and the upper gap of the slit (210) is larger than the lower gap of the slit;
a hot air mechanism (300), wherein the hot air mechanism (300) conveys hot air flow to the transition channel (200) through the slit (210);
and the cooling channel (400) is transversely arranged, and the cooling channel (400) is communicated with the output end of the transition channel (200).
2. The air flow cooling device according to claim 1, wherein: the hot air mechanism (300) comprises a cylinder body (310), the inside of cylinder body (310) is separated into a pressure stabilizing chamber (320) and an air storage chamber (330), the pressure stabilizing chamber (320) is in an annular arrangement, the pressure stabilizing chamber (320) is provided with an air inlet (321), the chamber wall of the pressure stabilizing chamber (320) surrounds the central axis of the cylinder body (310) to form the transition channel (200), the pressure stabilizing chamber (320) is communicated with the air storage chamber (330), and the air storage chamber (330) surrounds the transition channel (200) and is communicated with the slit (210).
3. The air flow cooling device according to claim 2, wherein: the pressure stabilizing chamber (320) is communicated with the air storage chamber (330) through a communication port (322), the position of the communication port (322) is surrounded by the slit (210), and the ventilation direction of the communication port (322) is parallel to the slit (210).
4. The air flow cooling device according to claim 2, wherein: the hot air mechanism (300) further comprises an air compressor and a heating component, the air compressor is communicated with the air inlet (321), and the heating component heats air compressed by the air compressor.
5. The air flow cooling device according to claim 1, wherein: the cooling channel (400) is formed by a hollow cooling tube (410) in the shape of a long tube.
6. A polyether ketone 3D prints monofilament production system which characterized in that: the single-screw extrusion device (500), the filtering device (600), the die head (700), the airflow cooling device (001), the diameter detection device (800) and the winding device (900) are sequentially arranged, the single-screw extrusion device (500) extrudes a melt, the melt is filtered by the filtering device (600) and then forms a melt trickle through the die head (700), the melt trickle enters the airflow cooling device (001) to be cooled and solidified to form monofilaments, and the monofilaments pass through the diameter detection device (800) to enter the winding device (900) for winding after being measured.
7. The polyetherketoneketone 3D printing monofilament production system of claim 6, wherein: the single screw extrusion device (500) is provided with a plurality of temperature control areas along the extrusion direction, and the temperature of each temperature control area along the extrusion direction of the single screw extrusion device (500) is gradually decreased within the range of 250-380 ℃.
8. The polyetherketoneketone 3D printing monofilament production system of claim 6, wherein: the filtering device (600) comprises a filter screen, and the filtering pore diameter of the filter screen is 15-30 um.
9. The polyetherketoneketone 3D printing monofilament production system of claim 6, wherein: the aperture range of the discharge hole of the die head (700) is 0.5-3 mm, and the axial length and the aperture ratio of the discharge hole are more than 4.
10. The polyetherketoneketone 3D printing monofilament production system of claim 6, wherein: the air inlet temperature of the hot air mechanism (300) is 60-120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684756.3U CN220593974U (en) | 2023-06-29 | 2023-06-29 | Airflow cooling device and polyether ketone 3D printing monofilament production system using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684756.3U CN220593974U (en) | 2023-06-29 | 2023-06-29 | Airflow cooling device and polyether ketone 3D printing monofilament production system using same |
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| CN220593974U true CN220593974U (en) | 2024-03-15 |
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| CN202321684756.3U Active CN220593974U (en) | 2023-06-29 | 2023-06-29 | Airflow cooling device and polyether ketone 3D printing monofilament production system using same |
Country Status (1)
| Country | Link |
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| CN (1) | CN220593974U (en) |
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2023
- 2023-06-29 CN CN202321684756.3U patent/CN220593974U/en active Active
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