CN106738892B - External colour mixture ware of FDM-3D printer - Google Patents
External colour mixture ware of FDM-3D printer Download PDFInfo
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- CN106738892B CN106738892B CN201710132191.0A CN201710132191A CN106738892B CN 106738892 B CN106738892 B CN 106738892B CN 201710132191 A CN201710132191 A CN 201710132191A CN 106738892 B CN106738892 B CN 106738892B
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- 239000000203 mixture Substances 0.000 title claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000002844 melting Methods 0.000 claims abstract description 59
- 230000008018 melting Effects 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000007599 discharging Methods 0.000 claims abstract description 38
- 239000003086 colorant Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 10
- 238000007639 printing Methods 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010017 direct printing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
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- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides an external color mixer of an FDM-3D printer, which comprises a box frame, a wire feeding device, a melting chamber, a wire outlet device and a cooling device, wherein a feeding flow passage of the melting chamber is connected with a feeding throat pipe, the wire feeding device is connected with the feeding throat pipe through a wire feeding pipe, a discharging flow passage of the melting chamber is connected with a wire outlet pipe through a wire outlet throat pipe, and the melting chamber is fixed in the box frame through a fixing device; the two ends of the cooling pipe are respectively communicated with the water pump and the lower water tank, the water pump conveys water of the lower water tank into the cooling pipe, and the water of the lower water tank and the water of the upper water tank are driven to circulate by the water pump. According to the invention, the wire feeding speed of wires with each color is controlled by the wire feeding device, so that different wire feeding amounts of wires with three primary colors and wires with five colors of black and white are realized, and the mixed wires are fed into the wire melting and wire discharging device through the guide pipe and are heated and melted to realize blending and color mixing, so that different mixed colors are formed; the space occupied by the printer is saved, the upgrading of the existing equipment is finished, and the cost is saved.
Description
Technical Field
The invention belongs to the technical field of FDM-3D printers, and particularly relates to an external color mixer of an FDM-3D printer.
Background
Currently, 3D printers are gradually going into the field of vision and life of people, and the development speed of the 3D printers is as remarkable as that of computers. The 3D printer is developed towards two directions of household and industrialization, wherein the household desktop grade 3D printer is hopeful to become a popular product like a mobile phone and a computer, and influences the daily life of people. At present, the desktop-level 3D printer is mainly used for designers, medical colleges, education and training units of primary and middle schools and originators. The design level of people is improved.
As 3D printers gradually enter mass consumption, performance requirements for 3D printers are becoming higher and higher. Most existing desktop printers are single color, single material design models. The purpose of changing color must be realized through changing the silk in the printing process, the operation is complicated, and the risk that the shower nozzle blocks up the silk increases because of printing interruption. At present, two solutions are generally adopted, one is to increase the number of spray heads and print different colors from different spray heads, and the disadvantage is that the spray heads are easy to scratch; the other is to print a plurality of colors after the nozzle is regulated, and the defect is that flash is easy to occur and printing defects are formed. The two designs are all to the whole structural improvement of printer, parts such as shower nozzle and conveying pipe all greatly occupy the limited space in printer upper strata after improving, are unfavorable for printing and further to the multi-material printing development. At present, the design thought is mostly to directly improve the whole structure of the printer, thereby improving the sales of the market to the whole machine. The development of modularity of the printer is not facilitated. Resulting in homogenization of the desktop FDM printer market products and low price malignant competition.
Disclosure of Invention
Therefore, an external color mixing device directly connected with the existing printer is designed. The direct printing of colorful workpieces can be realized on the basis of the existing single-nozzle printer, compared with the multi-nozzle printer, the space occupied by the printer is saved, the upgrading of the existing equipment is finished, and the cost is saved. Including the design of the mechanical structure of the color mixer and the design of the hardware of the control circuit.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the utility model provides an external color mixer of FDM-3D printer, includes box frame, wire feeder, melt room, go out silk device and cooling device and all locate in the box frame, melt the pan feeding runner of room and connect into the material throat, wire feeder passes through wire feed pipe and connects into the material throat, melt the play flow path of room and pass through play silk pipe connection, melt the room and pass through fixing device and be fixed in the box frame;
the cooling device comprises a water pump, a water delivery pipe, a cooling pipe, an upper water tank and a lower water tank, wherein the upper water tank is arranged above the tank frame, the lower water tank is arranged below the tank frame, a closed loop is formed among the upper water tank, the lower water tank and the water delivery pipes on two sides, the water pump is arranged at the joint of the water delivery pipe and the lower water tank, the cooling pipe is wound and connected to a wire outlet device, the two ends of the cooling pipe are respectively communicated with the water pump and the lower water tank, the water pump conveys water of the lower water tank into the cooling pipe, and the water pump drives water of the lower water tank and water of the upper water tank to circulate.
Further, wire feeder includes step motor, gear, auxiliary wheel, control panel, pipe and fan, step motor passes through the motor support frame to be fixed in on the box frame, and the fan is installed on the motor support frame, and control panel and auxiliary wheel are installed on the control panel mount pad, and the gear is installed on step motor's motor shaft, extrudees the wire between gear and the auxiliary wheel, and the wire realizes the control to wire feeding speed and wire feeding volume through gear and auxiliary wheel extrusion, and the wire is passed through the wire feeding pipe from the pipe and is conveyed to the melting chamber in, and the pipe joint is connected in the outside one end of pipe.
Further, the number of the stepping motors is 5, and the stepping motors are uniformly distributed on the periphery of the control panel mounting seat.
Further, a display screen seat is arranged on the box frame, and a display screen is arranged on the outer side of the display screen seat.
Further, a plurality of heating head grooves and a plurality of temperature sensor grooves are formed in the melting chamber, heating heads are inserted in the heating head grooves, and temperature sensors are inserted in the temperature sensor grooves.
Further, the longitudinal section of melting chamber is the hexagon, is fixed with the holding ring around melting chamber outside, and the terminal surface of connecting the pan feeding venturi on the melting chamber is through three support fin joint support frame, and the support frame is fixed in on the box frame, is equipped with pan feeding runner and the ejection of compact runner that are linked together in the melting chamber, pan feeding runner and pan feeding venturi intercommunication, ejection of compact runner and ejection of compact venturi intercommunication, the outer end of pan feeding runner and the outer end of ejection of compact runner all are equipped with the venturi junction.
Further, the cooling fins are uniformly distributed outside the feeding throat pipe and the discharging throat pipe, and the cooling pipe is wound outside the cooling fins of the discharging throat pipe.
Further, five feeding throats are arranged, wires with five colors are respectively introduced, and one discharging throat is arranged.
Further, a connecting support piece is fixed at the outer edge of the melting chamber and is fixedly connected between the support frame and the melting chamber.
Further, the temperature control range of the melt chamber is 190-280 ℃, and the filament output rate is 30-60 mm/s.
Compared with the prior art, the FDM-3D printer external color mixer has the following advantages: (1) The wire feeding device is used for controlling the wire feeding speed of wires with each color, so that different wire feeding amounts of wires with three primary colors and wires with five colors of black and white are realized, and the mixed wires are fed into the wire melting and wire discharging device through the guide pipe and are heated and melted, so that blending and color mixing are realized, and different mixed colors are formed. The molten material then passes through the filament outlet portion of the apparatus. Solidifying the mixture into a wire with a certain color sequence under the action of a cold field. The color printing ink is externally connected to a 3D printer, so that colorful works can be printed out;
(2) The phenomena of broken wires and wire piling in the printing process are avoided;
(3) A temperature sensor is arranged at a discharge hole of the color mixing device, the temperature of an outlet is monitored, and when the temperature of the outlet is high enough to realize rapid crystallization of the wire, a water pump relay and a cooling fan are connected, so that the outlet is rapidly cooled;
(4) The direct printing of colorful workpieces can be realized on the basis of the existing single-nozzle printer, compared with the multi-nozzle printer, the space occupied by the printer is saved, the upgrading of the existing equipment is finished, and the cost is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is a schematic view of the structure of the melting chamber, the discharge throat and the feed throat;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a right side view of the wire feeder of FIG. 1;
FIG. 6 is a top view of FIG. 1;
FIG. 7 is a schematic view of the structure of the melting chamber;
FIG. 8 is a cross-sectional view taken along the A-A plane in FIG. 7;
reference numerals illustrate:
1-a water pump; 2-a water supply pipe; 3-cooling pipes; 4-a water feeding tank; 5-a lower water tank; 6-a wire outlet catheter; 7-melting chamber; 8-a wire feeding catheter; 9-a stepper motor; 10-a catheter; 11-a fan; 12-a catheter adapter; 13-control panel; 14-auxiliary wheels; 15-wire; 16-gear; 17-a control board mounting base; 18-a motor support frame; 19-a display screen; 20-a display screen seat; 22-heat sink; 23-supporting a heat sink; 24-heating the head; 25-supporting frames; 26-connecting the support sheet; 27-a support ring; 28-box rack; 29-a discharge throat; 30-feeding throat pipe; 31-the junction of the throat; 32-a temperature sensor slot; 33-heating head tank; 34-a feeding runner; 35-a discharge flow channel.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1-8, an external color mixer of an FDM-3D printer comprises a box frame 28, a wire feeding device, a melting chamber 7, a wire discharging device and a cooling device, wherein the wire feeding device, the melting chamber 7, the wire discharging device and the cooling device are all arranged in the box frame 28, a feeding flow passage 34 of the melting chamber 7 is connected with a feeding throat 30, the wire feeding device is connected with the feeding throat 30 through a wire feeding pipe 8, a discharging flow passage 35 of the melting chamber 7 is connected with the wire discharging pipe 6 through a discharging throat 29, and the melting chamber 7 is fixed in the box frame 28 through a fixing device.
The cooling device comprises a water pump 1, a water delivery pipe 2, a cooling pipe 3, an upper water tank 4 and a lower water tank 5, wherein the upper water tank 4 is arranged above a tank frame 28, the lower water tank 5 is arranged below the tank frame 28, a closed loop is formed among the upper water tank 4, the lower water tank 5 and the water delivery pipes 2 on two sides, the water pump 1 is arranged at the joint of the water delivery pipe 2 and the lower water tank 5, the cooling pipe 3 is wound and connected to a wire outlet device, two ends of the cooling pipe 3 are respectively communicated with the water pump 1 and the lower water tank 5, the water pump 1 conveys water of the lower water tank 5 into the cooling pipe 3, and water circulation of the water of the lower water tank 5 and the upper water tank 4 is driven.
The cooling process of the cooling device is that cooling water takes away heat of the cooling fins 22 outside the discharging throat 29, and under the action of the water pump 1, the cooling device firstly carries out preliminary heat dissipation through the lower water tank 5, and then carries out further cooling through the flatter upper water tank 4. The cooling water is sent to the cooling fin 22 again by the water pump 1 for circulation cooling.
The wire feeder comprises a stepping motor 9, a gear 16, an auxiliary wheel 14, a control board 13, a guide pipe 10 and a fan 11, wherein the stepping motor 9 adopts a 42 stepping motor to provide power for the wire feeder, the stepping motor 9 is fixed on a box frame 28 through a motor support frame 18, the fan 11 is arranged on the motor support frame 18, the fan 11 blows air towards the stepping motor 9 and the cooling fins 22, and cooling of the cooling fins 22 outside a feeding throat 30 and a discharging throat 29 is accelerated.
The control board 13 and the auxiliary wheel 14 are arranged on a control board mounting seat 17, and the control board mounting seat 17 parallel to the motor support frame 18 is formed through a support rod, so that electrical elements such as a power switch and the like can be conveniently connected with the control board mounting seat.
The gear 16 is arranged on the motor shaft of the stepping motor 9, the wire 15 is extruded between the gear 16 and the auxiliary wheel 14, the wire 15 is extruded by the gear 16 and the auxiliary wheel 14 to realize the control of wire feeding speed and wire feeding quantity, the wire 15 is conveyed from the guide pipe 10 to the melting chamber 7 through the wire feeding guide pipe 8, and the guide pipe joint 12 is connected to the outward end of the guide pipe 10.
The number of the stepping motors 9 is 5, and the stepping motors are uniformly distributed on the periphery of the control board mounting seat 17.
The box frame 28 is provided with a display screen seat 20, and a display screen 19 is arranged outside the display screen seat 20.
By designing a special melting chamber 7, the melting chamber 7 has the characteristics of low temperature of a feed port and a discharge port and high temperature of the center of the melting chamber 7. The wire 15 begins to melt and expand when heated by the melting chamber 7, and the expansion of the wire 15 and the feeding throat 30 and the discharging throat 29 form a piston-like closed structure. Thus, by feeding the wire 15, the pressure is increased, the melted material at the discharge port moves outwards, and the volume is contracted after cooling, so that the solid wire 15 is formed. The feeding port and the discharging port are respectively connected through a throat, and radiating fins 22 are arranged outside the throat, wherein the radiating fins 22 are used for improving the cooling efficiency of the discharging port, and the radiating fins 22 of the discharging port are externally connected with a water cooling device.
A plurality of heating head grooves 33 and a plurality of temperature sensor grooves 32 are arranged in the melting chamber 7, the heating head 24 is inserted in the heating head grooves 33, and the temperature sensor is inserted in the temperature sensor grooves 32.
The longitudinal section of the melting chamber 7 is hexagonal, a supporting ring 27 is fixed around the outside of the melting chamber 7, the end face of the melting chamber 7, which is connected with a feeding throat 30, is connected with a supporting frame 25 through three supporting cooling fins 23, the supporting frame 25 is fixed on a box frame 28, a feeding runner 34 and a discharging runner 35 which are communicated are arranged in the melting chamber 7, the feeding runner 34 is communicated with the feeding throat 30, the discharging runner 35 is communicated with the discharging throat 29, and the outer ends of the feeding runner 34 and the discharging runner 35 are respectively provided with a throat joint 31.
The cooling fins 22 are uniformly distributed outside the feeding throat 30 and the discharging throat 29, and the cooling pipe 3 is wound outside the cooling fins 22 of the discharging throat 29.
Five feeding throats 30 are arranged, wires 15 with five colors are respectively led in, and one discharging throat 29 is arranged.
The outer edge of the melting chamber 7 is fixedly provided with a connecting support piece 26, and the connecting support piece 26 is fixedly connected between the supporting frame 25 and the melting chamber 7.
The temperature control range of the melting chamber 7 is 190-280 ℃, and the filament outlet speed is 30-60 mm/s.
The device controls the wire feeding speed of the wires 15 with each color through the wire feeding device, realizes the control of different wire feeding amounts of the wires 15 with three primary colors and five colors of black and white, and the mixed wires 15 are fed into the melting chamber 7 through the guide pipe 10 to be heated and melted, so as to realize blending and mixing colors, thereby forming different mixed colors. The molten material then passes through a wire take-off device. Under the effect of the cold field, the filaments 15 are solidified in a certain color sequence. The device is externally connected to a 3D printer, so that colorful works can be printed out.
The control hardware comprises an arduino2560, a development expansion board, 5 stepping motors 9, 1 water pump 1, a relay, 3 temperature sensors and a touch display. The control scheme comprises the following steps:
and a step a, controlling the wire feeding and discharging speed. And using the arduino2560 and the development expansion board as control cores, and communicating with the upper computer slicing software to obtain the printing speed of the 3D printer. In order to ensure that phenomena of broken wires and stacked wires do not occur in the printing process, the wire outlet speed of the designed color mixing device is consistent with the printing speed of a printer. The wire-out speed of the color mixing device is controlled by the wire-out speed, and the stepping motor 9 is controlled by the aruino 2560, so that the wire-out speed of the five-color wires 15 is further controlled.
And b, controlling the color mixing proportion. And (3) reading a color mixing database of the target color to obtain color matching ratios of the wires of the five colors, converting the color matching ratios into a wire feeding speed ratio of the wires 15, and controlling the wire feeding speed by using the stepping motor 9.
And c, controlling the temperature of the melting chamber 7 and the material inlet and outlet. A temperature sensor is arranged in the cavity of the melting chamber 7, the temperature of the melting chamber 7 is monitored in real time, and a heating device is connected when the temperature of the melting chamber 7 is lower than a set value; when the temperature is higher than the set value, the heating device is turned off. Due to hysteresis in temperature control, a proper algorithm is needed to realize constant temperature control of the melting chamber. The temperature sensor is arranged at the discharge port of the color mixing device, the outlet temperature is monitored, and when the outlet temperature is too high to realize rapid crystallization of the wire 15, the relay of the water pump 1 and the cooling fan 11 are connected, so that the outlet is rapidly cooled.
And d, controlling the temperature gradient. And a temperature sensor is arranged at the middle position of the melting chamber 7 and the outlet, and is matched with the temperature sensor of the melting chamber 7 and the temperature sensor of the outlet to realize the monitoring of a temperature field, and the temperature data is sent to an arduino2560 processing chip to form temperature field data. Further, a desired temperature field is obtained by controlling the heating device, the water pump 1 and the fan 11.
Example 1:
when PLA materials are mixed, the central temperature of the heating melting chamber 7 is controlled to be 190-200 ℃, and the temperature of the feeding and discharging port is less than 50 ℃. Wherein the red and blue wire feeding speeds are 20mm/s respectively. And stopping feeding the wires of the rest color wires. Finally, the mixed color purple is formed, and the filament outlet speed is 40mm/s.
Example 2:
when ABS materials are mixed, the central temperature of the heating melting chamber 7 is controlled to be 220-230 ℃ and the temperature of the material inlet and outlet is controlled to be 60-50 ℃. Wherein the red wire feed speed is 20mm/s and the yellow wire feed speed is 10mm/s. And stopping feeding the wires of the rest color wires. The final product was a mixed-color reddish orange color with a yarn output rate of 30mm/s.
Example 3:
when PA material is mixed, the central temperature of the heating melting chamber 7 is controlled at 250-280 ℃ and the temperature of the feeding and discharging port is 75-65 ℃. Wherein the yellow wire feeding speed is 30mm/s, the blue wire feeding speed is 20mm/s, and the black wire feeding speed is 10mm/s. The remaining color filaments 15 stop feeding. Finally, mixed color dark yellow-green is formed, and the filament outlet speed is 60mm/s.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. An external colour mixture ware of FDM-3D printer, its characterized in that: the wire feeding device, the wire melting chamber (7), the wire discharging device and the cooling device are all arranged in the box frame (28), a feeding flow passage (34) of the wire melting chamber (7) is connected with a feeding throat (30), the wire feeding device is connected with the feeding throat (30) through a wire feeding pipe (8), a discharging flow passage (35) of the wire melting chamber (7) is connected with a wire discharging pipe (6) through a discharging throat (29), and the wire melting chamber (7) is fixed in the box frame (28) through a fixing device;
the cooling device comprises a water pump (1), a water delivery pipe (2), a cooling pipe (3), an upper water tank (4) and a lower water tank (5), wherein the upper water tank (4) is arranged above a tank frame (28), the lower water tank (5) is arranged below the tank frame (28), a closed loop is formed among the upper water tank (4), the lower water tank (5) and the water delivery pipes (2) on two sides, the water pump (1) is arranged at the joint of the water delivery pipe (2) and the lower water tank (5), the cooling pipe (3) is wound and connected to a wire outlet device, two ends of the cooling pipe (3) are respectively communicated with the water pump (1) and the lower water tank (5), the water pump (1) conveys water of the lower water tank (5) into the cooling pipe (3), and drives water of the lower water tank (5) and water of the upper water tank (4) to circulate;
the wire feeding device comprises a stepping motor (9), a gear (16), an auxiliary wheel (14), a control board (13), a guide pipe (10) and a fan (11), wherein the stepping motor (9) is fixed on a box frame (28) through a motor support frame (18), the fan (11) is arranged on the motor support frame (18), the control board (13) and the auxiliary wheel (14) are arranged on a control board mounting seat (17), the gear (16) is arranged on a motor shaft of the stepping motor (9), a wire (15) is extruded between the gear (16) and the auxiliary wheel (14), the wire (15) is extruded through the gear (16) and the auxiliary wheel (14) to control the wire feeding speed and the wire feeding amount, the wire (15) is conveyed into a melting chamber (7) from the guide pipe (10) through a wire feeding guide pipe (8), and a guide pipe joint (12) is connected to the outward end of the guide pipe (10);
the box frame (28) is provided with a display screen seat (20), and a display screen (19) is arranged on the outer side of the display screen seat (20).
2. The external color mixer of the FDM-3D printer according to claim 1, wherein: the number of the stepping motors (9) is 5, and the stepping motors are uniformly distributed on the periphery of the control board mounting seat (17).
3. The external color mixer of the FDM-3D printer according to claim 1, wherein: a plurality of heating head grooves (33) and a plurality of temperature sensor grooves (32) are formed in the melting chamber (7), heating heads (24) are inserted into the heating head grooves, and temperature sensors are inserted into the temperature sensor grooves (32).
4. The external color mixer of the FDM-3D printer according to claim 1, wherein: the longitudinal section of the melting chamber (7) is hexagonal, a supporting ring (27) is fixedly arranged around the outside of the melting chamber (7), the end face of the melting chamber (7) connected with a feeding throat (30) is connected with a supporting frame (25) through three supporting radiating fins (23), the supporting frame (25) is fixed on a box frame (28), a feeding runner (34) and a discharging runner (35) which are communicated are arranged in the melting chamber (7), the feeding runner (34) is communicated with the feeding throat (30), the discharging runner (35) is communicated with the discharging throat (29), and throat joints (31) are respectively arranged at the outer ends of the feeding runner (34) and the discharging runner (35).
5. The external color mixer of the FDM-3D printer according to claim 1, wherein: and cooling fins (22) are uniformly distributed outside the feeding throat pipe (30) and the discharging throat pipe (29), and the cooling pipe (3) is wound outside the cooling fins (22) of the discharging throat pipe (29).
6. The external color mixer of the FDM-3D printer according to claim 1, wherein: five feeding throats (30) are arranged, wires (15) with five colors are respectively introduced, and one discharging throat (29) is arranged.
7. The external color mixer of the FDM-3D printer of claim 4, wherein: the outer edge of the melting chamber (7) is fixedly provided with a connecting supporting sheet (26), and the connecting supporting sheet (26) is fixedly connected between the supporting frame (25) and the melting chamber (7).
8. The external color mixer of the FDM-3D printer according to claim 1, wherein: the temperature control range of the melting chamber (7) is 190-280 ℃, and the filament outlet speed is 30-60 mm/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710132191.0A CN106738892B (en) | 2017-03-07 | 2017-03-07 | External colour mixture ware of FDM-3D printer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710132191.0A CN106738892B (en) | 2017-03-07 | 2017-03-07 | External colour mixture ware of FDM-3D printer |
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| CN106738892A CN106738892A (en) | 2017-05-31 |
| CN106738892B true CN106738892B (en) | 2024-03-19 |
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