CN113858609A - Heat preservation 3D printer - Google Patents
Heat preservation 3D printer Download PDFInfo
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- CN113858609A CN113858609A CN202010606341.9A CN202010606341A CN113858609A CN 113858609 A CN113858609 A CN 113858609A CN 202010606341 A CN202010606341 A CN 202010606341A CN 113858609 A CN113858609 A CN 113858609A
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- 238000004321 preservation Methods 0.000 title claims abstract description 25
- 238000007639 printing Methods 0.000 claims abstract description 107
- 230000007246 mechanism Effects 0.000 claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000009423 ventilation Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 2
- 238000010146 3D printing Methods 0.000 abstract description 6
- 238000010616 electrical installation Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 17
- 229920005989 resin Polymers 0.000 description 17
- 238000000016 photochemical curing Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001723 curing Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
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- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
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- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
-
- 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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a heat-preservation 3D printer which comprises a printing mechanism, an electric device and a shell, wherein an electric bin and a printing bin are arranged in the shell, a first air inlet is formed in the side surface of the electric bin, a first fan is arranged in the electric bin, a ventilation opening is formed in the side surface of the printing bin, and a third fan, a heating device and a first temperature sensor are arranged at the position close to the ventilation opening. This heat preservation 3D printer, printing mechanism and electrical installation set up respectively in printing storehouse and electrical storehouse, first fan introduces the outside air into the electrical storehouse through first air intake to form the air current, the third fan can be with the air current through the air current lead-in print the storehouse in, first temperature sensor detects the gas temperature that gets into in the printing storehouse, heating device heats gas according to the temperature value that detects, make the air current temperature roughly stabilize under the suitable operating temperature of printing mechanism printing product, keep warm to printing storehouse, make printing mechanism work under suitable temperature, this invention is used for the 3D printing field.
Description
Technical Field
The invention relates to the field of 3D printing, in particular to a heat-preservation 3D printer.
Background
The working principle of photocuring 3D printing is as follows: irradiating light with specific wavelength and intensity to a molding interface filled with photosensitive resin to cure the photosensitive resin in the molding interface to form a layer of printing sheet, and finishing the first layer of printing; and then, after the photosensitive resin is refilled in the forming interface again, continuously curing and forming another layer of printing sheet on the basis of the printing sheet, repeating the steps in such a way, and superposing and curing layer by layer to finally form an entity.
In photocuring 3D printing process, the temperature can influence photosensitive resin's mobility, and then influences the speed that photosensitive resin backward flow filled the shaping interface, when photosensitive resin backward flow speed was too slow, not only can prolong when printing the usefulness, still can influence the surface quality of printing. The existing photocuring 3D printer generally performs 3D printing at room temperature, and for 3D printed products which have high precision requirements and need to be produced in batch, the printing efficiency and the printing precision of the products can be influenced by the change of temperature.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides a heat-preservation 3D printer which can work at a proper temperature.
According to an embodiment of the present invention, there is provided an insulation 3D printer including:
a printing mechanism;
electrical means for controlling operation of the printing mechanism; and
the printing device comprises a shell, wherein an electric bin and a printing bin are arranged in the shell, the electric device is arranged in the electric bin, and the printing mechanism is arranged in the printing bin; wherein the content of the first and second substances,
the electric bin is provided with a first air inlet, a first fan is arranged inside the electric bin, and the first fan is used for introducing external air into the electric bin through the first air inlet;
the printing bin is provided with a ventilation opening, the ventilation opening is communicated with the electric bin and the printing bin, and a third fan, a heating device and a first temperature sensor are arranged at the position close to the ventilation opening.
Has the advantages that: this heat preservation 3D printer, printing mechanism and electric device set up respectively in printing storehouse and electric storehouse, first fan draws the outside air into the electric storehouse through first air intake in, and form the air current, the air current takes away the partial heat that electric device work produced, the third fan can be with the air current through the ventilation opening that enters into the electric storehouse introduce in the printing storehouse, a temperature sensor detects the gas temperature that gets into in the printing storehouse, heating device is according to the temperature value heating gas that detects, make the air current temperature roughly under the suitable operating temperature of printing mechanism printing product, because the printing storehouse is a relatively sealed space, the air current of specific temperature lets in and prints the storehouse in can keep warm to printing the storehouse, make printing mechanism work under suitable temperature, improve printing efficiency and printing precision.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the printing mechanism comprises a material tray, a forming platform and a first lifting mechanism, and the first lifting mechanism is used for driving the forming platform to lift to be far away from or close to the material tray.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the air guide device is arranged at the air vent, the air guide device is provided with at least two air guide channels, an air outlet grid is arranged between every two adjacent air guide channels, the air outlet grids are obliquely arranged, and the air outlet grids are obliquely arranged in different directions so that the areas of air flowing out of the air guide channels and passing over the material tray are equal.
According to the heat preservation 3D printer provided by the embodiment of the invention, each air guide channel is provided with a second air inlet and a second air outlet, the distance from each air outlet grid to the farthest frame of the material tray along the self-inclined direction is L, the larger the L value corresponding to the air outlet grid is, the larger the area of the second air inlet of the air guide channel corresponding to the air outlet grid is.
According to the heat preservation 3D printer provided by the embodiment of the invention, the area ratio S of the second air inlets of the two air guide channels1/S2＝β(a*L1/d1+γ)/(a*L2/d2+ gamma), where beta is not less than 1 and not more than 3, a is not less than 0.05 and not more than 0.12, gamma is not less than 0.1 and not more than 0.5, L1And L2L values, d of two air guide channels respectively1And d2The widths of the second air outlets of the two air guide channels are respectively.
According to the heat-preservation 3D printer provided by the embodiment of the invention, a gap is formed in one or more air outlet grids at one end close to the second air outlet and/or one end of the side face of the air guide channel close to the second air outlet.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the second temperature sensor is arranged at a position close to the material tray, and the third temperature sensor is arranged on the material tray. The second temperature sensor is used for monitoring the temperature of the periphery of the material tray, the third temperature sensor is used for monitoring the temperature of the photosensitive resin, and the temperature values detected by the second temperature sensor and the third temperature sensor can be used as references for adjusting the heating temperature of the heating device.
According to the heat preservation 3D printer provided by the embodiment of the invention, the light source is arranged in the electric bin, the light source is provided with the radiator, and the first fan is arranged between the first air inlet and the radiator. The first fan generates air flow, the air flow can take away partial heat generated by the operation of the radiator and the electric device, the heat dissipation of the light source and the electric device is facilitated, the air flow has partial heat, the heat required to be heated by the subsequent heating device is reduced, and therefore energy consumption is reduced.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the electric bin is further provided with a first air outlet, the light source and the first fan are arranged between the first air inlet and the first air outlet, and a second fan is arranged at a position close to the first air outlet. The airflow in the electric bin sequentially passes through the first air inlet, the electric device, the first fan, the radiator, the second fan and the first air outlet, partial heat of the electric device and the light source is taken away, the airflow is discharged out of the printer, and the heat dissipation of the light source and the electric device is achieved.
According to the heat preservation 3D printer provided by the embodiment of the invention, the first air inlet and/or the first air outlet are/is internally provided with an air filter. The air entering the electric bin is filtered, so that the dustproof effect is achieved, and the cleanness of the environment in the electric bin and the environment in the printing bin are kept.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the shell is provided with the sealing cover, the sealing cover is used for sealing the printing bin, and the sealing cover can be opened and closed. Realize opening and sealing of printing the storehouse through the sealed cowling, the 3D printer during operation, the sealed cowling is closed, prints the storehouse and is in encapsulated situation, prints the back that finishes, can open the sealed cowling, takes out 3D and prints the piece, perhaps changes 3D and print the material.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the sealing strip is arranged between the sealing cover and the shell, so that the dustproof effect is further improved.
According to the heat preservation 3D printer provided by the embodiment of the invention, the sealing strip is a felt strip or a brush, so that air introduced into the printing bin is discharged under the action of the third fan.
According to the heat-preservation 3D printer provided by the embodiment of the invention, the bending structure is arranged between the sealing cover and the shell, so that the dustproof effect is further improved.
The heat preservation 3D printer further comprises a second lifting mechanism, and the second lifting mechanism is used for driving the sealing cover to lift, so that the sealing cover can be opened and closed.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of a partial structure inside a heat-preservation 3D printer according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an external structure of a heat-preservation 3D printer according to an embodiment of the invention;
FIG. 3 is a schematic view, partially in section, of portion A-A of FIG. 2;
fig. 4 is a partially enlarged view of a portion B of fig. 3;
FIG. 5 is a schematic view of a partial structure of the interior of a print cartridge according to an embodiment of the present invention;
FIG. 6 is a front view of the relative positions of the air guiding device and the tray according to the embodiment of the present invention;
fig. 7 is a schematic structural view of a first viewing angle of the front surface of the air guiding device according to the embodiment of the present invention;
fig. 8 is a schematic structural view of a second viewing angle of the front surface of the air guiding device according to the embodiment of the present invention;
fig. 9 is a schematic structural view of a back surface of an air guiding device according to an embodiment of the present invention;
FIG. 10 is a top view of an air guide device and a tray according to an embodiment of the present invention;
reference numerals: the printing device comprises a printing mechanism 100, a tray 110, a forming platform 120, a first lifting mechanism 130, an electrical device 200, a housing 300, an electrical bin 310, a first air inlet 311, a first air outlet 312, a printing bin 320, an air vent 321, a sealing cover 330, a light source 400, a heat radiator 410, a first fan 10, a second fan 20, a third fan 30, a first sealing strip 40, a second sealing strip 50, a bending structure 60, a second lifting mechanism 70, a connecting plate 80, an air guiding device 90 and an air outlet grid 91.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, an embodiment of the present invention provides a thermal insulation 3D printer, including a printing mechanism 100, an electrical device 200, and a housing 300, where the printing mechanism 100 prints a product, the electrical device 200 is used to control the printing mechanism 100 to operate, an electrical bin 310 and a printing bin 320 are disposed in the housing 300, the electrical device 200 is disposed in the electrical bin 310, and the printing mechanism 100 is disposed in the printing bin 320. The side of the electrical bin 310 is provided with a first air inlet 311, the interior of the electrical bin 310 is provided with a first fan 10, and the first fan 10 is used for introducing outside air into the electrical bin 310 through the first air inlet 311. A vent 321 is provided on a side surface of the printing chamber 320, the vent 321 communicates the electric chamber 310 and the printing chamber 320, and a third fan 30, a heating device (not shown), and a first temperature sensor (not shown) are provided at a position close to the vent 321.
In the heat-preservation 3D printer of the embodiment, the printing mechanism 100 and the electrical device 200 are respectively arranged in the printing chamber 320 and the electrical chamber 310, the first fan 10 introduces outside air into the electrical chamber 310 through the first air inlet 311 to form an air flow, the air flow takes away part of heat generated by the operation of the electrical device 200, the third fan 30 can introduce the air flow entering the electrical chamber 310 into the printing chamber 320 through the air inlet 321, the first temperature sensor detects the temperature of the air entering the printing chamber 320, the heating device heats the air according to the detected temperature value to make the temperature of the air flow approximately stable at a proper working temperature of a product printed by the printing mechanism 100, the specific control method can adopt PID control, because the printing chamber 320 is a relatively sealed space, the air flow with a specific temperature can preserve heat of the printing chamber 320 when introduced into the printing chamber 320, so that the printing mechanism 100 operates at a proper temperature, the printing efficiency and the printing precision are improved.
It will be appreciated that the heating means heats the gas and that different heater configurations may be employed, for example heaters using electromagnetic heating, infrared heating or resistive heating, etc.
It is understood that the printing mechanism 100 is disposed in the printing chamber 320, and that some or all of the printing mechanism 100 may be disposed in the printing chamber 320, as long as the portion of the printing mechanism 100 that needs to be kept warm is disposed in the printing chamber 320.
In this embodiment, the thermal insulation 3D printer is a photo-curing 3D printer, the printing mechanism 100 includes a tray 110, a forming platform 120, and a first lifting mechanism 130, and the first lifting mechanism 130 is used to drive the forming platform 120 to lift and lower to be far away from or close to the tray 110. The tray 110 contains liquid photosensitive resin, the temperature of the photosensitive resin is a main factor affecting the printing efficiency and precision of the printing mechanism 100, and the vent 321 points to the tray 110 to introduce airflow at a proper temperature to the tray 110, so that the photosensitive resin is kept at a proper temperature.
Specifically, the first lifting mechanism 130 drives the forming platform 120 to lift, which may adopt different structures, such as a screw nut transmission mechanism, a rack and pinion transmission mechanism, or a linear transmission mechanism or device such as a linear module. During printing, the first lifting mechanism 130 drives the forming platform 120 to descend to contact with the liquid photosensitive resin in the tray 110, and along with the printing, the first lifting mechanism 130 drives the forming platform 120 to gradually ascend.
In some of these embodiments, a second temperature sensor is provided near the tray 110 and a third temperature sensor is provided on the tray 110. The second temperature sensor is used for monitoring the temperature around the charging tray 110, the third temperature sensor is used for monitoring the temperature of the photosensitive resin, and the temperature values detected by the second temperature sensor and the third temperature sensor can be used as a reference for adjusting the heating temperature of the heating device.
It can be understood that the thermal insulation 3D printer of the present embodiment is not limited to the photo-curing 3D printer, but may also be used in other 3D printers with operating temperature requirements, that is, the printing mechanism 100 may adopt different structures, and is not limited to the photo-curing printing mechanism of the present embodiment.
In addition, the electrical device 200 controls the printing mechanism to operate, and is specifically configured as a technical means known to those skilled in the art, which is not described herein, for example, the electrical device 200 may include, but is not limited to, a controller, such as a PLC or a control chip, and an electrical circuit, such as a power circuit and a protection circuit, the first lifting mechanism 130, the heating device, the first temperature sensor, the second temperature sensor, and the third temperature sensor are electrically connected to the controller, and the printing mechanism 100 performs the printing operation under the control of the controller.
In the present embodiment, the air guiding device 90 is disposed at the air vent 321, at least two air guiding channels are disposed on the air guiding device 90, specifically, the air guiding device 90 is arc-shaped, and in the present embodiment, three air guiding channels are disposed, as shown in fig. 7, a channel a, a channel B, and a channel C are respectively disposed. Referring to fig. 6 and 10, when the air guiding device 90 is not disposed directly above the material tray 110, but disposed at the side of the material tray 110, since the material tray 110 has a certain area size, there is a difference in distance between the air guiding device 90 and different positions on the material tray 110, and therefore, how to make the hot air flow guided out by the air guiding device 90 spread more uniformly to different positions on the material tray 110 to ensure that the temperatures at different positions on the material tray 110 are substantially equal is a problem to be solved, that is, to ensure that the temperatures of the photosensitive resins at various positions in the material tray 110 are substantially equal.
In this embodiment, an air outlet grid 91 is disposed between two adjacent air guiding channels (in addition, an air outlet grid 91 may be additionally disposed in the air guiding channel as required, in this embodiment, since the width of the channel C is larger, an air outlet grid 91 is additionally disposed in the channel C, refer to fig. 7), the direction of the air flow flowing out from the air guiding channel is controlled by the air outlet grid 91, the air outlet grid 91 is obliquely disposed, and each air outlet grid 91 is obliquely disposed in different directions so as to equalize the area of the hot air flowing out from each air guiding channel over the tray 110. Referring to fig. 10, the areas of the hot air flowing out of the three air guide channels and swept over the tray 110 are X respectively1、X2、X3Wherein X is1、X2And X3Separated by the extension lines of the air-out grilles 91, and the air-out grilles 91 are inclined in different directions to enable X1、X2And X3The heating areas of the air guide channels are approximately equal, so that the heating areas of the air guide channels are approximately equal.
Each air guide channel is provided with a second air inlet and a second air outlet, and referring to fig. 7, the front surface of each air guide channel is provided with the second air outlet; referring to fig. 9, the back of the air guiding channel is a second air inlet. According to the estimation of a fluid mechanics jet model, the hot air reaching distance of the second air outlet is in direct proportion to the outlet speed, and the hot air is involved in cold air in proportion to the square root of the distance in the flowing process, so that the farther away the second air outlet is, the lower the temperature is, and the slower the flow speed is. Refer to FIG. 10, wherein X3The region is farthest from the corresponding second air outlet so as to make X3The heating rate of the area is the same, more air needs to be distributed to participate in heat exchange, and the corresponding second air inlet needs to be designed to be larger. Therefore, considering the heating efficiency, different amounts of hot air need to be introduced into each air guide channel, and each second air inletThe size of the ports is designed to be different. Specifically, the distance that each air-out grid 91 extends to the farthest frame of the tray 110 along the self-inclined direction is set to be L, and the larger the L value corresponding to the air-out grid 91 is, the larger the second air inlet area of the air guide channel corresponding to the air-out grid 91 is.
Furthermore, the area ratio S of the second air inlets of any two air guide channels1/S2＝β(a*L1/d1+γ)/(a*L2/d2+ gamma), where beta, a and gamma are correction coefficients, beta is not less than 1 and not more than 3, a is not less than 0.05 and not more than 0.12, gamma is not less than 0.1 and not more than 0.5, L1And L2Respectively the L values, d of the two air guide channels1And d2The widths of the second air outlets of the two air guide channels are respectively. According to the above formula, the area ratio of the second air inlets can be accurately calculated, in this embodiment, the area ratio of the three second air inlets is 2:3:6, see fig. 9. Here, the side plate of the channel a is used as the corresponding air outlet grid for calculation, that is, the distance from the side plate of the channel a to the farthest frame of the tray 110 along the direction thereof is used as L1In FIG. 10, the L values corresponding to the channels A, B and C are L respectively1、L2And L3(ii) a D in FIG. 81、d2And d3The second air outlet widths of the channel A, the channel B and the channel C are respectively.
The above design (the direction of the air outlet grid 91 and the area of each second air inlet) is verified, the temperature of the photosensitive resin at each position in the tray 110 is tested, and it is found that there are still some deviations in the temperature of the photosensitive resin at some positions. Furthermore, a notch is arranged at one end of the air outlet grid 91 close to the second air outlet and/or one end of the side face of the air guide channel close to the second air outlet, and the air flow rate or the air output at the corresponding position is properly changed by arranging the notch, so that the heating efficiency is adjusted, the temperature of the photosensitive resin at each position in the tray 110 tends to be consistent, and the error caused by theoretical design is corrected. Referring to fig. 8, in the present embodiment, a gap M is provided at the front end of one of the air-out grills 91, and a gap N is provided at the front end of the side surface of the channel C, wherein the gap M can reduce the air flow rate at the position, and the gap N can increase the air outlet amount at the position.
In this embodiment, a light source 400 is disposed inside the electrical bin 310, the light source 400 emits light with a specific wavelength and intensity to the forming platform 120, the light source 400 is disposed below the tray 110, the light source 400 has a heat sink 410, the first fan 10 is disposed between the first air inlet 311 and the heat sink 410, and the electrical device 200 is disposed near the first air inlet 311. Specifically, the light source 400 may be a laser, an LCD, or a DLP, in this embodiment, the DLP light source 400 is provided with a plurality of heat dissipation fins on the heat sink 410. The first fan 10 generates an air flow, which can take away part of heat generated by the operation of the heat sink 410 and the electrical device 200, thereby facilitating the heat dissipation of the light source 400 and the electrical device 200, and the air flow has part of heat, which can reduce the heat required to be heated by a subsequent heating device, thereby reducing the energy consumption to a certain extent.
Further, a first air outlet 312 is further disposed at a side of the electrical cabin 310, the light source 400 and the first fan 10 are disposed between the first air inlet 311 and the first air outlet 312, and a second fan 20 is disposed at a position close to the first air outlet 312. The airflow in the electrical bin 310 sequentially passes through the first air inlet 311, the electrical device 200, the first fan 10, the heat sink 410, the second fan 20, and finally is discharged from the first air outlet 312, so that part of heat of the electrical device 200 and the light source 400 is taken away and discharged outside the printer, and heat dissipation of the light source 400 and the electrical device 200 is realized. In addition, part of the air flow is introduced into the printing chamber 320 under the action of the third fan 30, so as to keep the printing chamber 320 warm.
In some embodiments, an air filter is disposed in the first air inlet 311 and/or the first air outlet 312, and specifically, the air filter may be filter cotton, a filter net, a filter core, or the like. Air entering into the electrical bin 310 is filtered, so that the dustproof effect is achieved, the environment of the electrical bin 310 is kept clean, and the protection of the electrical device 200 is facilitated. Since the hot air flow in the print cartridge 320 is introduced from the electrical cartridge 310, the clean environment in the print cartridge 320 can be ensured.
It is understood that the light source 400 of the photo-curing 3D printer may be disposed above the tray 110, and when the light source 400 is disposed above the tray 110, the first fan 10 is disposed above the heat sink 410, the first air inlet 311 is disposed above the first fan 10, and the first air outlet 312 is disposed below the first fan 10, i.e., the air flow direction changes from top to bottom.
Referring to fig. 2 and 5, in the present embodiment, a sealing cover 330 is provided on the housing 300, the sealing cover 330 is used for sealing the printing chamber 320, and the sealing cover 330 is configured to be openable and closable, and specifically, may be opened and closed up and down, opened and closed back and forth, or opened and closed by rotation. The printing bin 320 is opened and sealed through the sealing cover 330, when the printing mechanism 100 works, the sealing cover 330 is closed, the printing bin 320 is in a sealing state, and after printing is finished, the sealing cover 330 can be opened, a 3D printing piece is taken out, or liquid photosensitive resin is added.
Due to the action of the third fan 30, clean hot air is continuously introduced into the printing chamber 320, the air pressure in the printing chamber 320 is kept at positive pressure, so that external dust can be prevented from entering the printing chamber 320, the air in the printing chamber 320 can be discharged through the contact gap between the sealing cover 330 and the housing 300,
referring to fig. 3 and 4, in some of these implementations, a seal is provided between the boot seal 330 and the housing 300 to further enhance the dust-proof effect. Specifically, the sealing cap 330 is provided with a first sealing strip 40, and the outer shell 300 is provided with a second sealing strip 50, which may be a felt strip or a brush, so as to exhaust air in the printing chamber 320 and prevent dust from entering the inside of the printing chamber 320.
In some embodiments, a bent structure 60 is provided between the sealing cap 330 and the housing 300 to further enhance the dust-proof effect. Specifically, the bending structure 60 may be disposed on the outer case 300 at a position contacting the sealing cap 330, referring to fig. 4; or the bending structure 60 is disposed on the sealing cap 330 at a position contacting the housing 300; or the housing 300 and the sealing cap 330 are provided with the bending structures 60 at the positions where they contact each other. The bending structure 60 can be bent into different shapes according to the requirement, and has at least one bending position, namely, approximately L-shaped; has two bending positions, which are approximately S-shaped, and is shown in figure 4.
In this embodiment, the thermal insulation 3D printer further includes a second lifting mechanism 70, and the second lifting mechanism 70 is configured to drive the sealing cap 330 to lift, so as to open and close the sealing cap 330. It is understood that the second lifting mechanism 70 may have different structures, such as a screw nut transmission mechanism, a rack and pinion transmission mechanism, or a linear transmission mechanism or device such as a linear module. The second elevating mechanism 70 is connected to the sealing cap 330 through a connecting plate 80. When the second lifting mechanism 70 drives the sealing cap 330 to descend to the lowest end, the sealing cap 330 contacts the housing 300 to seal the printing chamber 320; when the second lifting mechanism 70 drives the sealing cap 330 to ascend, an opening is formed between the lower end of the sealing cap 330 and the housing 300, and the printing chamber 320 is opened.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (14)
1. The utility model provides a heat preservation 3D printer which characterized in that includes:
a printing mechanism;
electrical means for controlling operation of the printing mechanism; and
the printing device comprises a shell, wherein an electric bin and a printing bin are arranged in the shell, the electric device is arranged in the electric bin, and the printing mechanism is arranged in the printing bin; wherein the content of the first and second substances,
the electric bin is provided with a first air inlet, a first fan is arranged inside the electric bin, and the first fan is used for introducing external air into the electric bin through the first air inlet;
the printing bin is provided with a ventilation opening, the ventilation opening is communicated with the electric bin and the printing bin, and a third fan, a heating device and a first temperature sensor are arranged at the position close to the ventilation opening.
2. The insulated 3D printer of claim 1, wherein: the printing mechanism comprises a material tray, a forming platform and a first lifting mechanism, wherein the first lifting mechanism is used for driving the forming platform to lift to be far away from or close to the material tray.
3. The insulated 3D printer of claim 2, wherein: the air guide device is arranged at the vent, at least two air guide channels are arranged on the air guide device, an air outlet grid is arranged between every two adjacent air guide channels, the air outlet grids are arranged in an inclined mode, and the air outlet grids are inclined in different directions so that the area of the air flowing out of each air guide channel and passing over the charging tray is equal.
4. The insulated 3D printer of claim 3, wherein: each air guide channel is provided with a second air inlet and a second air outlet, the distance from each air outlet grid to the farthest frame of the material tray along the self-inclined direction is L, the larger the L value corresponding to the air outlet grid is, the larger the area of the second air inlet of the air guide channel corresponding to the air outlet grid is.
5. The insulated 3D printer of claim 4, wherein: the area ratio S of the second air inlets of the two air guide channels1/S2＝β(a*L1/d1+γ)/(a*L2/d2+ gamma), where beta is not less than 1 and not more than 3, a is not less than 0.05 and not more than 0.12, gamma is not less than 0.1 and not more than 0.5, L1And L2L values, d of two air guide channels respectively1And d2The widths of the second air outlets of the two air guide channels are respectively.
6. The insulated 3D printer of claim 4, wherein: and a notch is arranged at one end of one or more air outlet grids close to the second air outlet and/or one end of the side surface of the air guide channel close to the second air outlet.
7. The insulated 3D printer of claim 2, wherein: and a second temperature sensor is arranged at a position close to the material tray, and a third temperature sensor is arranged on the material tray.
8. The insulated 3D printer of claim 1, wherein: the electric cabin is characterized in that a light source is arranged inside the electric cabin, the light source is provided with a radiator, and the first fan is arranged between the first air inlet and the radiator.
9. The insulated 3D printer of claim 8, wherein: the electric bin is also provided with a first air outlet, the light source and the first fan are arranged between the first air inlet and the first air outlet, and a second fan is arranged at a position close to the first air outlet.
10. The insulated 3D printer of claim 9, wherein: an air filter is arranged in the first air inlet and/or the first air outlet.
11. The thermal 3D printer of any one of claims 1-10, wherein: the printing device comprises a shell, a printing bin and a sealing cover, wherein the shell is provided with the sealing cover, the sealing cover is used for sealing the printing bin, and the sealing cover can be opened and closed.
12. The insulated 3D printer of claim 11, wherein: and a sealing strip is arranged between the sealing cover and the shell.
13. The insulated 3D printer of claim 11, wherein: and a bending structure is arranged between the sealing cover and the shell.
14. The insulated 3D printer of claim 11, wherein: the sealing cover lifting mechanism is used for driving the sealing cover to lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606341.9A CN113858609A (en) | 2020-06-29 | 2020-06-29 | Heat preservation 3D printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606341.9A CN113858609A (en) | 2020-06-29 | 2020-06-29 | Heat preservation 3D printer |
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| CN113858609A true CN113858609A (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010606341.9A Pending CN113858609A (en) | 2020-06-29 | 2020-06-29 | Heat preservation 3D printer |
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| CN (1) | CN113858609A (en) |
Cited By (1)
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| US20230079547A1 (en) * | 2021-09-14 | 2023-03-16 | Young Optics Inc. | 3d printing apparatus |
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