CN114770927A - Fused deposition modeling 3d printing device - Google Patents
Fused deposition modeling 3d printing device Download PDFInfo
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- CN114770927A CN114770927A CN202210435187.2A CN202210435187A CN114770927A CN 114770927 A CN114770927 A CN 114770927A CN 202210435187 A CN202210435187 A CN 202210435187A CN 114770927 A CN114770927 A CN 114770927A
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- 238000007639 printing Methods 0.000 title claims abstract description 71
- 230000008021 deposition Effects 0.000 title claims abstract description 19
- 239000000498 cooling water Substances 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 11
- 238000005485 electric heating Methods 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 18
- 238000007710 freezing Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 12
- 238000009434 installation Methods 0.000 description 10
- 230000008014 freezing Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 244000309464 bull Species 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000000110 selective laser sintering Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
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Classifications
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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
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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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
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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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
- B29C64/245—Platforms or substrates
-
- 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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- 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 fused deposition modeling 3d printing device, which comprises a base, a printing platform arranged in the middle of the base, a support frame vertically arranged on the base at two sides of the printing platform, a printing spray head and a feeding device, wherein the feeding device is arranged on the support frame and connected with the printing spray head; be provided with electric heating device on printing the shower nozzle, its characterized in that prints the shower nozzle and includes the shower nozzle body, and shower nozzle body lower extreme downwardly extending is provided with the nozzle, electric heating device installs on the nozzle, and this external water-cooling structure that still is provided with of shower nozzle, and water-cooling structure passes through flexible water pipe and cooling water tank and links to each other, is provided with the circulating pump and forms circulative cooling system in the cooling water tank or on the cooling water pipe. The invention has the advantages of better controlling the printing temperature to improve the printing quality and facilitating the separation and taking of the printed products from the printing platform.
Description
Technical Field
The invention relates to the technical field of additive manufacturing 3D printing, in particular to a fused deposition modeling 3D printing device.
Background
3D Printing (3D Printing) belongs to one of rapid prototyping technologies, and is also called additive manufacturing; the method is a technology for constructing an object by stacking, bonding and molding materials such as plastic, metal, ceramic powder and the like layer by using a laser, a hot melting nozzle and the like on the basis of a digital model. In recent years, 3D printing technology has been widely used in many fields such as industrial design, jewelry, automobiles, aerospace, dental and medical industries, education, and the like. At present, a common 3D printer comprises a selective laser melting SLM, a selective laser sintering SLS, three-dimensional powder bonding, fused laminated forming FDM and other types.
Fused Deposition Modeling (FDM), also known as Fused filament fabrication, is a process by which filaments of filamentary material, such as a thermoplastic, wax or metal, are extruded from a heated nozzle and melt deposited at a fixed rate and following a predetermined trajectory for each layer of the part.
The conventional fused deposition modeling 3d printer structurally comprises a base, a printing platform arranged in the middle of the base, supporting frames vertically arranged on the bases on two sides of the printing platform, and a printing spray head, wherein the supporting frames are provided with vertical telescopic mechanisms; when printing, the vertical telescopic mechanism controls the printing nozzle to vertically move to print layer by layer, and when printing on each layer, the horizontal moving device controls the printing nozzle to move along the printing path of the layer to finish printing.
This conventional structure has the following drawbacks: 1 is the shower nozzle position, if heating temperature is not high, filiform material melts the effect inadequately, and it is not good to print the shaping quality effect, if heating temperature is too high, then can lead to the inside high temperature of shower nozzle rear end and make its inner structure easily destroy. 2 the model product shaping of printing can bond together with table surface on table surface, often needs just can separate with the cutter, and the model is taken comparatively trouble.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a fused deposition modeling 3d printing device which can better control the printing temperature to improve the printing quality and further facilitate the taking of the printed products.
In order to solve the technical problem, the invention adopts the following technical scheme:
a fused deposition modeling 3d printing device comprises a base, a printing platform arranged in the middle of the base, supporting frames vertically arranged on the bases on two sides of the printing platform, a vertical telescopic mechanism arranged on the supporting frames, a printing spray head and a feeding device, wherein the printing spray head is arranged on the vertical telescopic mechanism through a horizontal moving device, and the feeding device is arranged on the supporting frames and connected with the printing spray head; be provided with electric heating device on printing the shower nozzle, its characterized in that prints the shower nozzle and includes the shower nozzle body, and shower nozzle body lower extreme downwardly extending is provided with the nozzle, electric heating device installs on the nozzle, and this external water-cooling structure that still is provided with of shower nozzle, and water-cooling structure passes through flexible water pipe and cooling water tank and links to each other, is provided with the circulating pump and forms circulative cooling system in the cooling water tank or on the cooling water pipe.
Like this, print shower nozzle during operation, electric heating device is alone to the nozzle position heating for send to the printing silk material of here and melt and spout and print, rely on recirculated cooling water pipeline pump water simultaneously, make water-cooling structure can continuously cool off the shower nozzle body, guarantee that its inside temperature is in lower state, do not receive the influence of nozzle position high temperature, improve the protection effect to the inside pay-off structure of shower nozzle body. Therefore, the nozzle position can be ensured to have enough high temperature under the condition of ensuring the safety, the melting effect of the printing silk material is ensured, and the printing precision is ensured. During implementation, the vertical telescopic mechanism and the horizontal moving device are mature prior art, and generally, a screw and nut mechanism is adopted to respectively realize the movement control in three directions, and the specific structure is not detailed here.
Furthermore, the water-cooling structure is a cooling water pipe spirally wound outside the spray head body or a water-cooling interlayer integrally arranged outside the spray head body.
Thus, the device has the advantages of simple structure and convenience in setting.
Furthermore, the cooling water tank is installed and fixed on a top plate at the upper end of the support frame. Thus, the installation, the fixation and the water supply are convenient.
Further, still be provided with freeze-proof safeties, freeze-proof safeties including fixed setting at cooling water tank outside lower extreme and with the inside elastic bag of intercommunication of cooling water tank, elastic bag lower extreme level is provided with the lower plate, elastic bag upper end level is provided with the punch holder, lower plate upper surface and punch holder lower surface have a pair of contact of relative setting, the contact is connected to the control circuit of circulating pump in, the punch holder top is still connected and is provided with punch holder lifting control device.
Therefore, when the circulating cooling system works, the upper clamping plate lifting control device is started firstly to control the upper clamping plate to move downwards, and when cooling water in the elastic bag is in a liquid state, the upper clamping plate lifting control device can control the upper clamping plate to move downwards and extrude the elastic bag to enable the contact to be connected. The control circuit of the circulation pump can now be switched on, so that the circulation cooling system starts to operate. When the cooling water freezes, the elasticity bag that freezes to be real can block the punch holder, and the control circuit of circulating pump can not put through this moment, avoids the circulating pump to start by force and leads to burning out the damage.
The reason for adopting the anti-freezing safety device is that the anti-freezing liquid is usually added into the cooling water for anti-freezing treatment, but the cooling water still freezes when the cooling water meets extreme cold weather. However, the freezing temperature is unstable due to the addition of the antifreeze solution to the cooling water, and it is difficult to determine whether freezing occurs by means of temperature detection. Meanwhile, the cooling water tank is located at a higher position and is in a closed state, and the cooling water tank is manually opened to check whether the ice is formed or not. And the cooling water tank freezes often begins from the top, and water pipe and circulating pump all set up at the cooling water tank lower extreme, so as long as the cooling water tank below does not freeze, but the reality still can work to can melt gradually along with the backward flow of cooling water freezes. The unsafe problem also exists to look over so the applicant has designed the freeze-proof safety device of above-mentioned pure physical principle as the safety switch of circulating pump for as long as the inside below position of cooling water tank does not freeze, just can open circulating pump cooling work, nevertheless in case the cooling water tank lower extreme freezes, then the elastic bag is frozen, and the contact can't be put through between the splint about this moment, and the circulating pump can't be opened, has played the nimble effect that detects convenient and can force the insurance.
Furthermore, the upper clamp plate lifting control device is a telescopic electric cylinder, a telescopic arm of the telescopic electric cylinder faces downwards and fixes the upper clamp plate, the telescopic electric cylinder is fixedly installed on an electric cylinder support, and the electric cylinder support is installed on the top plate.
Simple structure like this, and convenient implementation adopts this structure to be equivalent to the switch that has adopted flexible electric jar to replace the switch of circulating pump to rely on frostproofing safeties to realize the detection control whether freezing to the water tank bottom, greatly improved the safety control effect to the circulating pump.
Further, the punch holder includes that the level sets up two half splint relatively, half splint are located the top of elasticity bag, another half splint lower surface sets up the contact, two half splint relative one end articulate respectively on the splint installation piece of a vertical setting, splint installation piece is fixed at punch holder lift control device's flexible arm lower extreme, the intermediate position has the spout of a vertical setting on the splint installation piece, be provided with the slider in the spout, it has a symmetrical connecting rod to articulate respectively on two half splint, the upper end of two connecting rods articulates jointly in the outer tip of slider salient in the spout, still be provided with the retaining spring between two half splint and the splint installation piece, the retaining spring keeps horizontal state and the slider is located the spout lower extreme this moment when making half splint not receive external force.
Therefore, the holding force of the holding spring for keeping the horizontal state of the half clamping plate is adjusted to be larger than the elastic force required by extrusion deformation of the elastic bag, so that when cooling water in the elastic bag is liquid, the upper clamping plate can normally move downwards and the contact is connected. And when the cooling water is frozen solid in the elastic bag, the elastic bag can block the half splint when the telescopic arm of the upper splint lifting control device moves downwards, the holding force of the holding spring is overcome, and the outer ends of the two half splint are all upwards opened under the linkage action of the sliding block, so that the contact can not be switched on, but the normal work of the upper splint lifting control device can not be influenced. The loss of the motor of the upper clamping plate lifting control device due to forced output power caused by the fact that the upper clamping plate cannot move downwards after cooling water in the elastic bag is frozen is avoided.
Further, print platform includes a mesa case of installing on the base, and mesa case upper end middle part has a plurality of dead slots that set up side by side, and the dead slot is internal to correspond to be provided with gliding inserted block from top to bottom, and inserted block upper end initial position flushes with mesa case upper surface, and the inserted block lower extreme is fixed on the layer board of the level setting of a mesa incasement portion, and the layer board lower extreme is provided with layer board lift control device.
Like this, after printing finishes, can rely on layer board lifting control device, the control layer board is ejecting upwards, and then will print the product and break away from mesa case upper surface, conveniently takes to lift off and print the product, solves the defect that the product that the melt formed is difficult to take off from print platform.
Further, the supporting plate lifting control device comprises a lifting pipe vertically and fixedly arranged at the middle part of the lower surface of the supporting plate, a sleeve is sleeved outside the lifting pipe, the outer side of the sleeve is fixed in the table-board box through a horizontal supporting plate, a vertical sliding fit is realized between the sleeve and the lifting pipe by a vertically arranged rotation-stopping concave-convex structure, a rotating column is arranged in the lifting pipe in a matched manner, the rotating column is rotatably arranged in the table-board box and is connected with a power device through a transmission mechanism, a lifting control slide way is arranged on the inner side wall of the lifting pipe, a lifting control bulge is fixedly arranged on the outer side of the rotating column and is in sliding fit in the lifting control slide way, the lifting control slide way is provided with a first slide way part, a second slide way part, a third slide way part and a fourth slide way part which are mutually connected along the circumferential direction of the sleeve, the first slide way part is horizontally arranged, one end of the second slide way part is connected with the first slide way part, the other end sets up to one side, and third slide portion one end and second sliding portion upper end link up, and the other end sets up to one side down and the lower extreme surpasss first sliding portion place height, and fourth slide portion one end and third slide portion lower extreme are connected, and the other end is upwards to one side and first slide portion initiating terminal link up.
When the lifting control bulge is positioned on the first slide way part, the upper surface of the insert block is flush with the upper surface of the table board box and serves as a working table board for printing and forming products, after printing is finished, the rotating column is controlled to rotate, the lifting control bulge slides into the second slide way part from the first slide way part, and the lifting pipe moves downwards to drive the insert block to move downwards to be forcibly separated from the products; then the lifting control bulge slides into the third slideway part, the lifting pipe rises to drive the insert block to move upwards and jack the product upwards, so that the product is separated from the surface of the table-board box; then the lifting control protrusion slides into the fourth slide way portion and returns to the first slide way portion through the fourth slide way portion, the lifting pipe drives the insert block to reset downwards, and the insert block rotates for a circle to complete a cycle. The existence of the first horizontal slide way part allows a section of allowance to be reserved for resetting, and the resetting effect is ensured. Therefore, the rotating column is controlled to rotate for a circle, the lifting control of descending, ascending and descending of the supporting plate is completed, and the product is completely separated from the surface of the workbench. The device has the advantages of simple structure, convenience and rapidness in implementation and reliability in control.
Furthermore, drive mechanism is including installing driven gear on rotating the post and rather than the driving gear of meshing, and the driving gear is fixed on the driving gear axle of vertical setting, and the epaxial fixed mounting of driving gear has the worm wheel, and worm wheel and the worm meshing that the level set up, the worm outer end stretches out the mesa case and sets up the bull stick handle.
Like this, conveniently rotate the bull stick handle through hand and realize control. Simple structure and convenient control. In practice, the rotary column can be connected with the motor to realize electric control.
In conclusion, the printing temperature control device has the advantages that the printing temperature can be better controlled to improve the printing quality, and the printed products are convenient to separate from the printing platform and take.
Drawings
FIG. 1 is a schematic diagram of a specific embodiment of the present invention.
Fig. 2 is a schematic view of the individual freeze protection fuse of fig. 1.
Fig. 3 is a schematic view of the structure of the single counter top box of fig. 1.
Fig. 4 is a top view of fig. 3.
FIG. 5 is a schematic view of the interior wall of the riser of FIG. 1 after deployment.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
The specific implementation mode is as follows: referring to fig. 1-5, a fused deposition modeling 3d printing device comprises a base 1, a printing platform arranged in the middle of the base 1, supporting frames 3 vertically arranged on the bases on two sides of the printing platform, vertical telescopic mechanisms 4 arranged on the supporting frames 3, a printing nozzle and a feeding device, wherein the printing nozzle is arranged on the vertical telescopic mechanisms through a horizontal moving device 5, and the feeding device (not shown) is arranged on the supporting frames and connected with the printing nozzle; be provided with electric heat equipment 6 on the printing shower nozzle, wherein, print the shower nozzle and include shower nozzle body 7, shower nozzle body 7 lower extreme downwardly extending is provided with nozzle 8, electric heat equipment 6 installs on nozzle 8, still is provided with water-cooling structure 9 outside shower nozzle body 7, and water-cooling structure 9 links to each other through flexible water pipe 10 and coolant tank 11, is provided with the circulating pump in coolant tank 11 (or on the coolant pipe) and forms circulative cooling system.
Like this, print the shower nozzle during operation, electric heating device is alone to the heating of nozzle position for send to the printing silk material of here and melt and spout and print, rely on recirculated cooling water pipeline pump water simultaneously, make the water-cooling structure can continuously cool off the shower nozzle body, guarantee that its inside temperature is in lower state, do not receive the influence of nozzle position high temperature, improve the protection effect to the inside pay-off structure of shower nozzle body. Therefore, the nozzle position can be ensured to have enough high temperature under the condition of ensuring the safety, the melting effect of the printing silk material is ensured, and the printing precision is ensured. During implementation, the vertical telescopic mechanism and the horizontal moving device are both mature prior art, and generally, a lead screw and nut mechanism is adopted to respectively realize the movement control in three directions, and the specific structure is not detailed here.
The water cooling structure 9 is a cooling water pipe spirally wound outside the nozzle body, or may be a water cooling interlayer integrally disposed outside the nozzle body in other embodiments.
Thus, the device has the advantages of simple structure and convenience in setting.
Wherein, the cooling water tank 11 is installed and fixed on the top plate at the upper end of the supporting frame. Thus, the installation, the fixation and the water supply are convenient.
Wherein, still be provided with freeze-proof safeties, freeze-proof safeties including fixed setting at cooling water tank outside lower extreme and with the inside elastic bag 12 of intercommunication of cooling water tank, elastic bag 12 lower extreme level is provided with lower plate 13, elastic bag upper end level is provided with the punch holder, lower plate 13 upper surface and punch holder lower surface have a pair of contact 15 that sets up relatively, contact 15 is connected to the control circuit of circulating pump in, the punch holder top is still connected and is provided with punch holder lift control device 16.
Therefore, when the circulating cooling system works, the upper clamping plate lifting control device is started firstly to control the upper clamping plate to move downwards, and when cooling water in the elastic bag is in a liquid state, the upper clamping plate lifting control device can control the upper clamping plate to move downwards and extrude the elastic bag to enable the contact to be connected. The control circuit of the circulation pump can now be switched on, so that the circulation cooling system starts to operate. When the cooling water freezes, the elasticity bag of freezing real can block the punch holder, and the control circuit of circulating pump can not put through this moment, avoids the circulating pump to start by force and leads to burning out the damage.
The reason for adopting the anti-freezing safety device is that the anti-freezing liquid is usually added into the cooling water for anti-freezing treatment, but the cooling water still freezes when the cooling water meets extreme cold weather. However, the freezing temperature is unstable due to the addition of the antifreeze solution to the cooling water, and it is difficult to determine whether freezing occurs by means of temperature detection. Meanwhile, because the cooling water tank is located at a higher position and is in a closed state, it is troublesome to manually open the cooling water tank to check whether the cooling water tank is frozen. And the cooling water tank freezes often begins from the top, and water pipe and circulating pump all set up at the cooling water tank lower extreme, so as long as the cooling water tank below is not frozen, the reality still can work to can melt gradually along with the backward flow of cooling water is frozen. Therefore, the applicant designs the anti-freezing safety device based on the pure physical principle as a safety switch of the circulating pump, so that the circulating pump can be started for cooling operation as long as the position below the inside of the cooling water tank is not frozen, but once the lower end of the cooling water tank is frozen, the elastic bag is frozen, the contact between the upper clamp plate and the lower clamp plate cannot be communicated at the moment, the circulating pump cannot be started, and the effects of flexible detection, convenience and safety forcing are achieved.
The upper clamping plate lifting control device 16 is a telescopic electric cylinder, a telescopic arm of the telescopic electric cylinder faces downwards and fixes the upper clamping plate, the telescopic electric cylinder is fixedly installed on an electric cylinder support 17, and the electric cylinder support 17 is installed on a top plate.
Simple structure like this, and convenient implementation adopts this structure to be equivalent to the switch that has adopted flexible electric jar to replace the switch of circulating pump to rely on frostproofing safeties to realize the detection control whether freezing to the water tank bottom, greatly improved the safety control effect to the circulating pump.
Wherein, the punch holder includes that the level sets up two half splint 14 relatively, half splint are located the top of elasticity bag, another half splint lower surface sets up contact 15, the relative one end of two half splint articulates respectively on the splint installation piece 18 of a vertical setting, splint installation piece 18 is fixed at punch holder lift control device's flexible arm lower extreme, the intermediate position has the spout 19 of a vertical setting on the splint installation piece, be provided with the slider in the spout 19, it has a symmetrical connecting rod 20 to articulate respectively on two half splint, the upper end of two connecting rods 20 articulates jointly on the outer tip of slider salient in the spout, still be provided with between two half splint 14 and the splint installation piece 18 and keep spring 21, keep horizontal state and the slider is located the spout lower extreme this moment when keeping spring 21 makes half splint not receive external force.
Therefore, the holding force of the holding spring for keeping the horizontal state of the half clamping plate is adjusted to be larger than the elastic force required by extrusion deformation of the elastic bag, so that when cooling water in the elastic bag is liquid, the upper clamping plate can normally move downwards and the contact is connected. And when the cooling water is frozen solid in the elastic bag, the elastic bag can block the half splint when the telescopic arm of the upper splint lifting control device moves downwards, the holding force of the holding spring is overcome, and the outer ends of the two half splint are all upwards opened under the linkage action of the sliding block, so that the contact can not be switched on, but the normal work of the upper splint lifting control device can not be influenced. The loss of the motor of the upper clamping plate lifting control device due to forced output power caused by the fact that the upper clamping plate cannot move downwards after cooling water in the elastic bag is frozen is avoided.
Wherein, print platform includes a mesa case 2 of installing on the base, and mesa case 2 upper end middle part has a plurality of dead slots 29 that set up side by side, and the correspondence is provided with gliding inserted block 22 from top to bottom in the dead slot 29, and inserted block 22 upper end initial position flushes with mesa case 2 upper surface, and inserted block 22 lower extreme is fixed on the layer board 23 of the level setting of a mesa incasement portion, and layer board 23 lower extreme is provided with layer board lifting control device.
Like this, after printing finishes, can rely on layer board lifting control device, the control layer board is ejecting upwards, and then will print the product and break away from mesa case upper surface, conveniently takes to lift off and print the product, solves the defect that the product that the melt formed is difficult to take off from print platform.
Wherein, the supporting plate lifting control device comprises a lifting pipe 24 vertically and fixedly arranged at the middle part of the lower surface of the supporting plate, a sleeve pipe 25 is sleeved outside the lifting pipe 24, the outer side of the sleeve pipe 25 is fixed in the table top box 2 through a horizontal supporting plate 26, the vertical sliding fit is realized between the sleeve pipe 25 and the lifting pipe 24 by a vertically arranged rotation stopping concave-convex structure, a rotating column 27 is arranged in the lifting pipe 24 in a matching way, the rotating column 27 is rotatably arranged in the table top box, the rotating column 27 is connected with a power device through a transmission mechanism, a lifting control slide way is arranged on the inner side wall of the lifting pipe 24, a lifting control bulge 28 is fixedly arranged at the outer side of the rotating column, the lifting control bulge 28 is in a sliding fit way in the lifting control slide way, the lifting control slide way is provided with a first slide way part 31, a second slide way part 32, a third slide way part 33 and a fourth slide way part 34 which are mutually connected along the circumferential direction of the sleeve pipe, first slide portion 31 level sets up, and second slide portion 32 one end and first slide portion link up, and the other end sets up to one side, and third slide portion 33 one end and second sliding portion upper end link up, and the other end sets up and the lower extreme surpasss first sliding portion place height to one side down, and fourth slide portion 34 one end and third slide portion lower extreme are connected, and the other end links up with first slide portion initiating terminal to one side.
When the lifting control protrusion is located on the first slide way portion, the upper surface of the insertion block is flush with the upper surface of the table board box and serves as a working table for printing and forming of products, after printing is finished, the rotating column is controlled to rotate, the lifting control protrusion slides into the second slide way portion from the first slide way portion, the lifting pipe descends, and the insertion block is driven to move downwards to be forcibly separated from the products; then the lifting control bulge slides into the third slideway part, the lifting pipe rises to drive the insert block to move upwards and jack the product upwards, so that the product is separated from the surface of the table-board box; then the lifting control bulge slides into the fourth slide way part and returns to the first slide way part through the fourth slide way part, the lifting pipe drives the inserting block to reset downwards, and the lifting pipe rotates for a circle to complete a cycle. The existence of the first horizontal slide way part allows a section of allowance to be reserved for resetting, and the resetting effect is ensured. Therefore, the rotating column is controlled to rotate for a circle, the lifting control of descending the supporting plate first and then ascending and then descending is completed, and the product is completely separated from the surface of the workbench. The device has the advantages of simple structure, convenience and rapidness in implementation and reliability in control.
Wherein, drive mechanism is including installing driven gear 35 on rotating post 27 and rather than the driving gear 36 of meshing, and driving gear 36 is fixed on vertical setting's driving gear axle 37, and epaxial fixed mounting of driving gear has worm wheel 38, and worm wheel and the meshing of the worm 39 that sets up of level, the worm outer end stretches out the mesa case and sets up bull stick handle 40.
Like this, conveniently rotate the bull stick handle through hand and realize control. Simple structure and convenient control. In practice, the rotary column can be connected with the motor to realize electric control.
Claims (10)
1. A3 d printing device for fused deposition modeling comprises a base, a printing platform arranged in the middle of the base, supporting frames vertically arranged on the bases on two sides of the printing platform, a vertical telescopic mechanism arranged on the supporting frames, a printing spray head and a feeding device, wherein the printing spray head is arranged on the vertical telescopic mechanism through a horizontal moving device, and the feeding device is arranged on the supporting frames and connected with the printing spray head; be provided with electric heating device on printing the shower nozzle, its characterized in that prints the shower nozzle and includes the shower nozzle body, and shower nozzle body lower extreme downwardly extending is provided with the nozzle, electric heating device installs on the nozzle, and this external water-cooling structure that still is provided with of shower nozzle, and water-cooling structure passes through flexible water pipe and cooling water tank and links to each other, is provided with the circulating pump and forms circulative cooling system in the cooling water tank or on the cooling water pipe.
2. The fused deposition modeling 3d printing apparatus as recited in claim 1, wherein the water cooling structure is a cooling water pipe spirally wound outside the nozzle body, or a water cooling interlayer integrally disposed outside the nozzle body.
3. The fused deposition modeling 3d printing apparatus as recited in claim 1 wherein the cooling water tank is mounted on a top plate fixed on the upper end of the support frame.
4. The fused deposition modeling 3d printing device as claimed in claim 1, wherein an anti-freezing safety device is further provided, the anti-freezing safety device comprises an elastic bag fixedly arranged at the lower end of the outer side of the cooling water tank and communicated with the inside of the cooling water tank, a lower clamp plate is horizontally arranged at the lower end of the elastic bag, an upper clamp plate is horizontally arranged at the upper end of the elastic bag, a pair of oppositely arranged contacts are arranged on the upper surface of the lower clamp plate and the lower surface of the upper clamp plate, the contacts are connected to a control loop of the circulating pump, and an upper clamp plate lifting control device is further connected above the upper clamp plate.
5. The fused deposition modeling 3d printing apparatus as recited in claim 4 wherein the upper clamp plate lifting control device is a telescopic electric cylinder, the telescopic arm of the telescopic electric cylinder faces downward and fixes the upper clamp plate, the telescopic electric cylinder is fixed on an electric cylinder bracket, and the electric cylinder bracket is fixed on the top plate.
6. The fused deposition modeling 3d printing device as recited in claim 4 wherein the upper clamp plate includes two half clamp plates that are horizontally disposed opposite to each other, one half clamp plate is located above the elastic bag, the lower surface of the other half clamp plate is provided with a contact, the opposite ends of the two half clamp plates are hinged to a vertically disposed clamp plate mounting block, the clamp plate mounting block is fixed at the lower end of the telescopic arm of the upper clamp plate lifting control device, a vertically disposed chute is formed in the middle of the clamp plate mounting block, a sliding block is disposed in the chute, two symmetrical connecting rods are hinged to the two half clamp plates, the upper ends of the two connecting rods are hinged to the outer end portion of the sliding block protruding out of the chute, a retaining spring is disposed between the two half clamp plates and the clamp plate mounting block, the retaining spring keeps the half clamp plates in a horizontal state when not subjected to external force, and the sliding block is located at the lower end of the chute.
7. The fused deposition modeling 3d printing device as claimed in claim 1, wherein the printing platform includes a table top box installed on the base, the middle of the upper end of the table top box has a plurality of slots arranged side by side, the slots are correspondingly provided with inserting blocks capable of sliding up and down, the starting position of the upper end of the inserting block is flush with the upper surface of the table top box, the lower end of the inserting block is fixed on a horizontally arranged support plate inside the table top box, and the lower end of the support plate is provided with a support plate lifting control device.
8. The fused deposition modeling 3d printing device as recited in claim 7, wherein the pallet lifting control device comprises a lifting pipe vertically fixed in the middle of the lower surface of the pallet, a sleeve is sleeved outside the lifting pipe, the outer side of the sleeve is fixed in the table box through a horizontal supporting plate, a vertical sliding fit is realized between the sleeve and the lifting pipe by a vertically arranged rotation stopping concave-convex structure, a rotating column is arranged in the lifting pipe in a matching way, the rotating column is rotatably installed in the table box and is connected with the power device through a transmission mechanism, a lifting control slide is arranged on the inner side wall of the lifting pipe, a lifting control protrusion is fixedly arranged on the outer side of the rotating column and is in sliding fit in the lifting control slide, the lifting control slide is provided with a first slide part, a second slide part, a third slide part and a fourth slide part which are mutually connected along the circumferential direction of the sleeve, first slide portion level sets up, second slide portion one end and first slide portion link up, and the other end sets up to one side, and third slide portion one end and second sliding portion upper end link up, and the other end sets up and the lower extreme surpasss first sliding portion place height to one side down, and fourth slide portion one end and third slide portion lower extreme are connected, and the other end links up with first slide portion initiating terminal to one side.
9. The fused deposition modeling 3d printing apparatus as recited in claim 8 wherein the transmission mechanism includes a driven gear mounted on the rotating column and a driving gear engaged therewith, the driving gear is fixed on a vertically disposed driving gear shaft, a worm wheel is fixedly mounted on the driving gear shaft, the worm wheel is engaged with a horizontally disposed worm, the outer end of the worm extends out of the table box and is provided with a rotating handle.
10. The fused deposition modeling 3d printing apparatus as recited in claim 8 wherein the rotating column is connected to the motor for electrical control.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311800530.XA CN117656457A (en) | 2022-04-24 | 2022-04-24 | Anti-freezing safety device for fused deposition modeling 3d printing device |
| CN202210435187.2A CN114770927B (en) | 2022-04-24 | 2022-04-24 | Fused deposition modeling 3d printing device |
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| CN202210435187.2A CN114770927B (en) | 2022-04-24 | 2022-04-24 | Fused deposition modeling 3d printing device |
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| CN202311800530.XA Division CN117656457A (en) | 2022-04-24 | 2022-04-24 | Anti-freezing safety device for fused deposition modeling 3d printing device |
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| CN114770927A true CN114770927A (en) | 2022-07-22 |
| CN114770927B CN114770927B (en) | 2024-01-16 |
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| CN202311800530.XA Pending CN117656457A (en) | 2022-04-24 | 2022-04-24 | Anti-freezing safety device for fused deposition modeling 3d printing device |
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| CN114770927B (en) | 2024-01-16 |
| CN117656457A (en) | 2024-03-08 |
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