CN112477109A - Fused deposition 3D printer and digital linear array adjustable spray head device thereof - Google Patents
Fused deposition 3D printer and digital linear array adjustable spray head device thereof Download PDFInfo
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- CN112477109A CN112477109A CN202011075123.3A CN202011075123A CN112477109A CN 112477109 A CN112477109 A CN 112477109A CN 202011075123 A CN202011075123 A CN 202011075123A CN 112477109 A CN112477109 A CN 112477109A
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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
- 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
- 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
- B29C64/295—Heating elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention relates to the technical field of additive manufacturing, in particular to a fused deposition 3D printer and a digital linear array adjustable spray head device thereof. The nozzle device comprises a heating block, a nozzle, cutting strips and a displacement adjusting mechanism, wherein one end of the heating block is provided with a feeding port, the other end of the heating block is provided with a plurality of discharge ports which are arranged at intervals along a straight line, the nozzle is provided with a plurality of extrusion ports with the same number as the discharge ports, each extrusion port is coaxially and correspondingly arranged with one discharge port, the number of the cutting strips is the same as the number of the extrusion ports, each cutting strip is provided with an adjusting hole, the cutting strips are arranged between the heating block and the nozzle, can heat piece and nozzle removal relatively under displacement adjustment mechanism's regulation, can control through removing the cutting corresponding extrusion outlet ejection of compact and not switching between the state of ejection of compact, make the region that this shower nozzle device covered once print, need not to change or repeat the route, print the route simply, reduce the G code volume, the printing can be accomplished in single-layer section once scanning, improves printing efficiency.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to a fused deposition 3D printer and a digital linear array adjustable spray head device thereof.
Background
The 3D printer technology is a new production and manufacturing technology that integrates the fields of computers, control, electrical, materials, and the like, and has been widely used in the fields of industrial design and manufacturing, aerospace, military, medical treatment, construction, automobiles, education, and the like, due to the fact that the product development cycle is short, the production efficiency is high, and the production cost is low. Along with the wide application of 3D printing technology, people also attach more and more importance to the efficiency of 3D printing production.
The existing Fused Deposition Modeling (FDM) 3D printing principle is to store a three-dimensional model in a standard ". stl" file format, then cut the model into a series of sheets with specific thicknesses by using slicing software, then perform printing path planning on each sheet and generate G codes, control a motor to drive a spray head to move and extrude a molten printing material onto a printing platform, after printing is completed, the printing platform descends by one layer height, and print the next sheet until printing is completed finally.
The existing FDM type 3D printing principle is that a nozzle with a fixed extrusion opening size or an adjustable extrusion opening size is used for scanning and printing for multiple times, in order to avoid non-printing pixel points, the printing line planning is complex, and the G code amount is large. When printing, the spray head needs to be frequently accelerated and decelerated, and needs to move back and forth in a printing plane, so that the printing time is long, and the printing efficiency is low.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a digital linear array adjustable spray head device and a fused deposition 3D printer comprising the same, and solves at least one problem in the prior art.
(II) technical scheme
In order to achieve the above object, in a first aspect, the present invention provides a digital linear array adjustable spraying head device, including:
the heating device comprises a heating block, a plurality of heating elements and a plurality of control units, wherein a feeding port is formed in one end of the heating block, a plurality of discharging ports which are arranged at intervals along a straight line are formed in the other opposite end of the heating block, and each discharging port is communicated with the feeding port;
the nozzle is provided with a plurality of extrusion ports with the same number as the discharge ports, the nozzle is fixed on the heating block, and each extrusion port is coaxially arranged with one corresponding discharge port;
the number of the cutting slips is the same as that of the extrusion ports, each cutting slip is provided with an adjusting hole and is arranged between the nozzle and the heating block, the adjusting holes are communicated with the discharge port and the extrusion ports, so that printing materials can be discharged from the extrusion ports, and each cutting slip can independently reciprocate relative to the heating block; and
the displacement adjusting mechanism is used for respectively adjusting the reciprocating movement of each cutting;
when the discharge of one extrusion port needs to be prevented, the corresponding cutting moves towards one direction, so that the adjusting hole and the discharge port are staggered; when the extrusion opening needs to be recovered for discharging, the cutting is reset.
Preferably, the heating block comprises two block dividing bodies, a runner groove is formed in the matching surface of each block dividing body, the two block dividing bodies are fixed through bolts to form the heating block, the two matching surfaces are arranged in a clinging mode, and the two runner grooves form a runner from a feeding port to a discharging port.
Preferably, the heating block is heated by a heating rod.
Preferably, the heating block is provided with a plurality of inserting strip sliding grooves with the same number as the discharging holes, and each inserting strip is slidably connected with the heating block through one inserting strip sliding groove.
Preferably, two ends of the cutting are respectively provided with a cutting connecting hole;
the displacement adjusting mechanism comprises two adjusting frames which are respectively arranged at two sides of the heating block, each adjusting frame comprises a frame body and two insulating steering cylinders which are arranged on the frame body at intervals, an insulating fixing block is further arranged between the two insulating steering cylinders on the frame body, and the insulating fixing block is provided with fixing holes with the same number as the number of the inserting strips;
the adjusting frame still includes nickel titanium alloy memory silk, the quantity of the nickel titanium alloy memory silk that every adjusting frame corresponds is the same with the quantity of cutting, the one end of every nickel titanium alloy memory silk is connected with a corresponding cutting connecting hole insulation, the other end is walked around respectively two insulation and is turned to the cylinder after and be connected with a corresponding fixed orifices, many nickel titanium alloy memory silks are connected with serial relay, serial relay is multichannel serial relay, connect the on/off electricity that controls many nickel titanium alloy memory silks respectively through multichannel serial relay.
Preferably, the both sides of heating block still are equipped with a spacing respectively, and spacing includes:
the limiting plate is perpendicular to the moving direction of the cuttings, is arranged at intervals with the heating block and is used for limiting the moving distance of the cuttings, and the limiting plate is provided with wire passing holes with the same number as the cuttings;
the sliding fixing plate is provided with sliding blocks, the number of the sliding blocks is the same as that of the wire passing holes, the sliding direction of each sliding block is the same as that of the insertion strip, two ends of each sliding block are provided with a sliding block connecting hole, the sliding block connecting hole at one end penetrates through the corresponding wire passing hole through a connecting wire to be connected with the corresponding insertion strip connecting hole, and the sliding connecting hole at the other end is in insulation connection with the corresponding nickel-titanium alloy memory wire.
Preferably, the rack body is made of polytetrafluoroethylene material; and/or
The insulating steering cylinder is made of polytetrafluoroethylene materials or the surface of the insulating steering cylinder is covered with a polytetrafluoroethylene insulating layer.
Preferably, the limiting plate and the sliding fixing plate are vertically connected to form an L-shaped structure, and the sliding fixing plate is located on one side of the limiting plate away from the heating block.
Preferably, the heating block is further provided with a temperature sensor, and the heating temperature of the heating block is adjusted through feedback of the temperature sensor.
In a second aspect, the invention further provides a fused deposition 3D printer, which includes any one of the digital linear array adjustable nozzle devices in the first aspect.
(III) advantageous effects
The technical scheme of the invention has the following advantages: the invention provides a digital linear array adjustable nozzle device, which comprises a heating block, a nozzle, cutting slips and a displacement adjusting mechanism, wherein one end of the heating block is provided with a feed inlet, the other end of the heating block is provided with a plurality of discharge outlets which are arranged at intervals along a straight line, each discharge outlet is communicated with the feed inlet, the nozzle is provided with a plurality of extrusion outlets with the same number as the discharge outlets, the nozzle is fixed on the heating block, each extrusion outlet is coaxially and correspondingly arranged with one discharge outlet, the number of the cutting slips is the same as the number of the extrusion outlets, each cutting slip is provided with an adjusting hole, the cutting slips are arranged between the heating block and the nozzle and can move relative to the heating block and the nozzle, the adjusting holes are communicated with the discharge outlets and the extrusion outlets in one state, so that printing materials can be discharged from the extrusion outlets after passing through the adjusting holes, when the discharge of one of the extrusion outlets needs to be prevented, the displacement adjusting mechanism adjusts the cutting slips corresponding to, the adjusting hole and the discharge hole are staggered, and the discharge hole is disconnected with the extrusion hole; when the extrusion opening needs to be recovered for discharging, the displacement adjusting mechanism adjusts the cutting to reset, so that the adjusting hole is communicated with the discharge opening and the extrusion opening again. The area covered by the digital linear array adjustable spray head device can be printed at one time, the path does not need to be changed or repeated, the printing path is simple, the G code amount is reduced, the printing can be completed by scanning the single-layer slice at one time, and the printing efficiency is improved.
The fused deposition 3D printer comprises the digital linear array adjustable nozzle device, when in printing, the area covered by the digital linear array adjustable nozzle device can be printed at one time without changing or repeating the path, the printing path is simple, the G code amount is reduced, the printing can be completed by scanning a single slice at one time, and the printing efficiency is improved.
Drawings
The drawings of the present invention are provided for illustrative purposes only, and the proportion and the number of the components in the drawings do not necessarily correspond to those of an actual product.
Fig. 1 is a schematic structural diagram of a digital linear array adjustable spray head device according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of a digital linear array adjustable spraying head device according to an embodiment of the present invention;
fig. 3 is an exploded view of the digital linear array adjustable spray head device of fig. 2 at another angle;
FIG. 4 is a schematic structural diagram of a slip according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an example of printing according to one embodiment of the present invention;
fig. 6 is a schematic structural diagram of a digital linear array adjustable nozzle device according to a second embodiment of the present invention (nitinol memory wires are not shown);
FIG. 7 is a schematic structural diagram of a cutting according to a second embodiment of the present invention;
FIG. 8 is a schematic structural view of an adjusting bracket according to a second embodiment of the present invention (Ni-Ti alloy memory wire is not shown);
FIG. 9 is a schematic view of an arrangement of a Ni-Ti alloy memory wire according to a second embodiment of the present invention;
fig. 10 is a schematic structural diagram of a digital linear array adjustable nozzle device according to a third embodiment of the present invention (nitinol memory wires and connecting wires are not shown);
fig. 11 is a schematic structural diagram of a stop frame according to a third embodiment of the present invention (the connecting wire is not shown).
In the figure: 1: a heating block; 11: a feeding port; 12: a slip chute;
2: a nozzle; 21: an extrusion port;
3: cutting; 31: an adjustment hole; 32: a connecting hole for the cutting;
4: a heating rod; 5: a temperature sensor;
6: an adjusting bracket; 61: a frame body; 62: an insulating steering cylinder; 63: insulating fixed blocks; 631: a fixing hole; 64: a nickel-titanium alloy memory wire.
7: a limiting frame; 71: a limiting plate; 711: a wire passing hole; 72: a sliding fixing plate; 721: a slider slot; 73: a slide block.
100: a printing platform; 200: and (4) modeling.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example one
Referring to fig. 1 to 4, a digital linear array adjustable spray head device provided in an embodiment of the present invention includes a heating block 1, a nozzle 2, an insert 3, and a displacement adjustment mechanism.
Referring to fig. 1-3, one end of the heating block 1 is provided with a feeding port 11, the other end opposite to the feeding port is provided with a plurality of discharging ports arranged at intervals along a straight line, and each discharging port is communicated with the feeding port, that is, the feeding port forms a plurality of branch channels through branch flow, and finally forms a plurality of discharging ports at the other end of the heating block. In a specific embodiment, the feeding port 11 is divided into two branch flow channels by one flow channel for four times, sixteen branch flow channels are formed after the last stage of flow division and arranged at intervals (linear arrays) along a straight line, and the end parts of the sixteen branch flow channels are the discharging ports.
Of course, the sixteen branch runners are only examples and are not limiting to the present invention, for example, the feeding port 11 is divided into five branches, each branch runner is divided into two branch runners by one runner, thirty-two branch runners are formed and arranged along a straight line at intervals (linear array) after the last branch runner is divided, the ends of the thirty-two branch runners are discharge ports, that is, thirty-two discharge ports are provided, and correspondingly, thirty-two extrusion ports 21 and thirty-two insertion strips 3 are provided.
In other embodiments, each diversion may also be divided into three or more branch runners by one runner, and in the case of multi-stage diversion, the number of the diversion of each branch runner may also be different, for example, the material inlet may be divided into two branch runners, where the first branch runner is divided into three branch runners again, and the second branch runner is divided into two branch runners again.
Of course, it is preferable that one flow channel is divided into two branch flow channels at a time, so as to facilitate the control and regulation of the flow rate.
Referring to fig. 2 and 3, a plurality of extrusion ports 21 with the same number as the number of the discharge ports are arranged on the nozzle 2, the nozzle 2 is fixed on the heating block 1, and each extrusion port is coaxially arranged corresponding to one discharge port. Preferably, the nozzle 2 is fixed to the heating block 1 by screws.
Referring to fig. 2-4, the number of the slips 3 is the same as the number of the extrusion ports 21, each slip 3 is provided with an adjusting hole 31, the slip 3 is disposed between the heating block 1 and the nozzle 2 and can move relative to the heating block 1 and the nozzle 2, in one state, the adjusting holes 31 are disposed in communication with the discharge port and the extrusion ports 21, so that the printing material can be discharged from the extrusion ports 21 through the adjusting holes 31 by the heating discharge port, and preferably, the adjusting holes 31 are disposed coaxially with the discharge port and the extrusion ports 21. When the discharge of one extrusion opening 21 needs to be prevented, the displacement adjusting mechanism drives the cutting 3 corresponding to the extrusion opening 21 to move towards one direction, so that the adjusting hole 31 and the discharge opening are staggered, and the discharge opening is disconnected with the extrusion opening 21; when the extrusion opening 21 needs to be recovered for discharging, the displacement adjusting mechanism drives the cutting 3 to reset, so that the adjusting hole 31 is communicated with the discharge opening and the extrusion opening 21 again. Similarly, when the discharging of the extrusion openings 21 needs to be prevented, the corresponding cutting 3 is moved, which is not described herein again.
Preferably, as shown in fig. 2 and 3, the end of the heating block 1 provided with the discharge ports is provided with a slip chute 12, each discharge port corresponds to one slip chute 12, the slip 3 is arranged in the slip chute 12, and the lower side surface (the side close to the nozzle 2) is flush with the lower end surface (the side close to the nozzle 2) of the heating block 1, so that the upper end surface (the side close to the heating block 1) of the nozzle 2 is tightly attached to the lower end surface of the heating block 1, which is beneficial to sealing.
Referring to fig. 5, when the model 200 is printed by using a digital linear array adjustable nozzle device with sixteen discharge ports, the digital linear array adjustable nozzle device moves above the printing platform 100 along the nozzle scanning direction, in the moving process, an area covered by the digital linear array adjustable nozzle device can be printed at one time, if a non-printing area is arranged in the middle, the controller controls the displacement adjusting mechanism to move the corresponding insert bar 3, so that the corresponding extrusion port 21 is prevented from discharging, the path does not need to be changed or repeated, the printing path is simple, the G code amount is reduced, the printing can be completed by scanning a single-layer slice at one time, and the printing efficiency is improved.
In some preferred embodiments, the heating block 1 includes two block bodies, a runner groove is provided on a mating surface of each block body, the two block bodies are fixed by bolts to form the heating block, and the two mating surfaces are disposed in close contact with each other, so that the two runner grooves form a runner from the material inlet 1 to the material outlet. The heating block 1 is arranged in a split manner, so that the processing of a flow channel, the cleaning of the heating block 1 and the like are facilitated, and the installation of parts such as a heating device and the like is facilitated.
In some preferred embodiments, the heating block 1 is heated by a heating rod 4. Preferably, the heating block 1 is further provided with a temperature sensor 5, so as to facilitate heating temperature control.
It should be noted that, the heating rod 4 and the temperature sensor 5 may be implemented by using the prior art, and therefore, the installation and working principle thereof are not described in detail.
Example two
Referring to fig. 6 to 8, the second embodiment is basically the same as the first embodiment, and the same parts are not repeated herein, except: referring to fig. 7, both ends of the insert 3 are provided with an insert coupling hole 32, respectively.
Referring to fig. 6 and 8, the displacement adjusting mechanism includes two adjusting frames 6 respectively disposed at two sides of the heating block 1, each adjusting frame 6 includes a frame body 61 and two insulating turning cylinders 62 disposed at intervals on the frame body 61, an insulating fixing block 63 is further disposed at a position between the two insulating turning cylinders 62 on the frame body 61, and fixing holes 631 having the same number as the number of the inserts 3 are disposed on the insulating fixing block 63.
Still be equipped with nickel titanium alloy memory wire 64 on the alignment jig 6, the quantity of the nickel titanium alloy memory wire 64 that every alignment jig 6 corresponds is the same with the quantity of cutting 3, the one end of every nickel titanium alloy memory wire 64 and a corresponding cutting connecting hole 32 insulated joint, the other end is connected with a corresponding fixed orifices 631 after bypassing two insulated turning cylinders 62 respectively, many nickel titanium alloy memory wires 64 are connected with serial relay, serial relay connects to be multichannel serial relay, connect the on/off electricity that controls many nickel titanium alloy memory wires 64 respectively through multichannel serial relay.
In a specific embodiment, sixteen inserting strips 3 are provided, one end of each inserting strip 3 corresponds to one adjusting frame 6, that is, each adjusting frame 6 is provided with sixteen nitinol memory wires 64, one end of each inserting strip 3 corresponds to one nitinol memory wire 64, the serial relay is a 16-path serial relay, the sixteen nitinol memory wires 64 are respectively connected with the positive and negative electrodes of the 16-path serial relay, and the 16-path serial relay can respectively control the power on/off of the sixteen nitinol memory wires 64. By utilizing the power-on shrinkage characteristic of the nickel-titanium alloy memory wire 64 and changing the temperature of the nickel-titanium alloy memory wire 64 through power on/off, the nickel-titanium alloy memory wire 64 is shrunk and deformed to pull the insertion strip 3 to move, and when the resetting is needed, the corresponding nickel-titanium alloy memory wire 64 on the other side of the heating block 1 is powered on to pull the insertion strip 3 to move for resetting. Specifically, when the discharge of one extrusion opening 21 needs to be prevented, the controller sends an instruction to the serial port relay, so that the nickel-titanium alloy memory wire 64 at one end of the corresponding cutting 3 is powered on, the nickel-titanium alloy memory wire 64 at the other end of the cutting is powered off, the nickel-titanium alloy memory wire 64 at the powered end contracts to pull the cutting 3 to move, the adjusting hole 31 is staggered with the discharge opening and the extrusion opening 21, and at the moment, the nickel-titanium alloy memory wire 64 at the other end of the cutting 3 is in a straightened but unstressed state. When the extrusion opening 21 is required to recover to discharge, the on/off states of the nickel-titanium alloy memory wires 64 on the two sides are switched to reset the inserting bar 3, and at the moment, the power-off nickel-titanium alloy memory wires 64 are in a straightened but unstressed state.
It should be noted that when the number of the inserting strips 3 is different, for example, 2, 3, 4, 5, 6, 8, 9, 32, etc., the number of the nitinol memory wires 64 is changed, so that the number of the serial ports of the serial relay is increased, that is, the number of the serial ports is not less than the number of the nitinol memory wires 64.
In some embodiments, two adjusting frames 6 share a serial relay, for example, when each adjusting frame 6 includes 16 nitinol memory wires 64, the serial relay selects a serial relay with no less than sixteen serial ports. Of course, to facilitate the connection and layout of the nitinol memory wire 64, it is preferable that each adjusting bracket 6 corresponds to a serial relay.
In this embodiment, preferably, the spacing plates 71 on both sides of the heating block 1 are the same from the heating block, the adjusting hole 31 on the cutting is located at a non-intermediate position (in the moving direction of the cutting), one end of the cutting 3 always abuts against the spacing plate 71, for example, when the extrusion opening 21 is in a state capable of discharging, the adjusting hole 31 is communicated with the discharge opening and the extrusion opening 21, at this time, the end of the cutting farther from the adjusting hole 31 abuts against the spacing plate 71, when the cutting 3 is moved to prevent the extrusion opening 21 from discharging, the end of the cutting closer to the adjusting hole 31 abuts against the spacing plate 71, and the adjusting hole 31 is staggered from the discharge opening and the extrusion opening 21.
In one embodiment, the outlet and the adjustment hole 31 are both square holes, and the extrusion opening is a circular hole.
The insulation steering cylinder 62 mainly changes the pulling direction of the nickel-titanium alloy memory wires 64, and as shown in fig. 9, an arrangement mode of the nickel-titanium alloy memory wires 64 is provided, and specifically, each nickel-titanium alloy memory wire 64 firstly bypasses from the lower side and the outer side (the side far away from the heating block 1) of the insulation steering cylinder 62 at the lower side, then upwards bypasses from the inner side (the side close to the heating block 1) and the upper side of the insulation steering cylinder 62 at the upper side, and then is connected with the corresponding fixing hole 631 on the insulation fixing block 63.
It should be noted that the insulating property of the insulating steering cylinder 62 may be formed by itself being made of an insulating material, such as Polytetrafluoroethylene (PTFE), or an insulating layer, such as a PTFE insulating layer, may be laid on the outside of the insulating steering cylinder 62. Similarly, the insulating property of the insulating fixing block 63 may be formed by itself being made of an insulating material, for example, Polytetrafluoroethylene (PTFE), or by laying an insulating layer, for example, PTFE, at a position where it is required to contact the nitinol memory wire 64.
In some embodiments, the frame body 61 is integrally made of Polytetrafluoroethylene (PTFE) having high temperature insulation properties.
EXAMPLE III
Referring to fig. 10 and fig. 11, the third embodiment is substantially the same as the second embodiment, and the same parts are not described again, except that: and two sides of the heating block are respectively provided with a limiting frame 7, and the limiting frames comprise a limiting plate 71 and a sliding fixing plate 72.
The limiting plate 71 is perpendicular to the moving direction of the slip 3 and is arranged at an interval with the heating block, and is used for limiting the moving distance of the slip 3 and ensuring that the movement of the slip 3 can effectively prevent or recover the extrusion of the printing material. The stopper plate 71 is provided with the same number of wire holes 711 as the number of the cuttings 3.
The sliding fixing plate 72 is provided with sliding blocks 73 with the same number as the wire passing holes 711, the sliding direction of the sliding blocks 73 is the same as the sliding direction of the insertion strips 3, both ends of each sliding block 73 are provided with a sliding block connecting hole 731, the sliding block connecting hole 731 close to the heating block 1 passes through the corresponding wire passing hole 711 to be connected with the corresponding insertion strip connecting hole 32 through a connecting wire (not shown in the figure), and the sliding connecting hole 731 at the other end is in insulation connection with the corresponding nickel-titanium alloy memory wire 64. That is, in this embodiment, the nitinol memory wire 64 is connected to the plunger 3 through the slider 73 and the connecting wire. Preferably, the connecting wire is a high temperature resistant steel wire.
In one embodiment, the fixed slide plate 72 is provided with a slider slot 721 matched with the slider 73, and the slider 73 can slide in the slider slot 721. Preferably, the limit plate 71 is detachably and fixedly connected with the heating block 1 through a connecting block 74, so that the spacing distance between the limit plate 71 and the heating block 1 can be well limited. Preferably, the slider 73 is made of an insulating material, such as Polytetrafluoroethylene (PTFE), or an insulating layer is laid at a position where it is required to contact the nitinol memory wire 64.
In some embodiments, the retainer plate 71 and the sliding fixing plate 72 are made of a high temperature resistant insulating material, for example, Polytetrafluoroethylene (PTFE).
In some preferred embodiments, the retainer plate 71 is vertically connected to the fixed sliding plate 72 to form an L-shaped structure, and the fixed sliding plate 72 is located on a side of the retainer plate 71 away from the heating block 1. Preferably, the retainer plate 71 and the slide fixing plate 72 are integrally formed.
Example four
The fused deposition 3D printer provided in the fourth embodiment may adopt any one of the digital linear array adjustable nozzle devices in the first to third embodiments, and the structures of the transmission mechanism, the feeding device, the heat dissipation device, and the like may be implemented by using the prior art, which is not described herein again.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: each embodiment does not include only one independent technical solution, and in the case of no conflict between the solutions, the technical features mentioned in the respective embodiments can be combined in any way to form other embodiments which can be understood by those skilled in the art.
Furthermore, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the scope of the present invention, and the essence of the corresponding technical solutions does not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A digital linear array adjustable spray head device is characterized by comprising:
the heating device comprises a heating block, a plurality of heating units and a plurality of control units, wherein a feeding port is formed in one end of the heating block, a plurality of discharge ports which are arranged at intervals along a straight line are formed in the other opposite end of the heating block, and each discharge port is communicated with the feeding port;
the nozzle is provided with a plurality of extrusion ports with the same number as the discharge ports, the nozzle is fixed on the heating block, and each extrusion port is coaxially arranged with one corresponding discharge port;
the number of the cutting slips is the same as that of the extrusion ports, each cutting slip is provided with an adjusting hole, the cutting slips are arranged between the nozzle and the heating block, the adjusting holes are communicated with the discharge port and the extrusion ports, so that printing materials can be discharged from the extrusion ports, and each cutting slip can independently reciprocate relative to the heating block; and
the displacement adjusting mechanism is used for respectively adjusting the reciprocating movement of each cutting;
when the discharge of one extrusion opening needs to be prevented, the corresponding cutting moves towards one direction, so that the adjusting hole and the discharge opening are staggered; and when the extrusion opening needs to recover to discharge, the cutting resets.
2. The digital linear array adjustable sprinkler device of claim 1, wherein: the heating piece includes two piecemeal bodies, every all be equipped with the runner groove on the fitting surface of piecemeal body, two the piecemeal body passes through the bolt fastening and forms the heating piece, two the fitting surface is hugged closely the setting, makes two the runner groove is constituteed by the pan feeding mouth extremely the runner of discharge gate.
3. The digital linear array adjustable sprinkler device of claim 1 or 2, wherein: the heating block is heated by a heating rod.
4. The digital linear array adjustable sprinkler device of claim 1, wherein: the heating block is provided with a plurality of inserting strip sliding grooves with the same quantity as the discharge holes, and each inserting strip is connected with the heating block in a sliding mode through one inserting strip sliding groove.
5. The digital linear array adjustable sprinkler device of claim 1, wherein:
both ends of the cutting are respectively provided with a cutting connecting hole;
the displacement adjusting mechanism comprises two adjusting frames which are respectively arranged on two sides of the heating block, each adjusting frame comprises a frame body and two insulating steering cylinders which are arranged on the frame body at intervals, an insulating fixing block is further arranged between the two insulating steering cylinders on the frame body, and the insulating fixing block is provided with fixing holes with the same number as the number of the inserting strips;
the adjusting frame further comprises nickel-titanium alloy memory wires, the number of the nickel-titanium alloy memory wires corresponding to each adjusting frame is the same as that of the inserting strips, one end of each nickel-titanium alloy memory wire is connected with one corresponding inserting strip connecting hole in an insulating mode, the other end of each nickel-titanium alloy memory wire bypasses two insulating steering cylinders and then is connected with one corresponding fixing hole, the nickel-titanium alloy memory wires are connected with a serial relay, the serial relay is a multi-path serial relay, and the on/off of the nickel-titanium alloy memory wires is controlled through the connection of the multi-path serial relay.
6. The digital linear array adjustable sprinkler device of claim 5, wherein: the both sides of heating block still are equipped with a spacing respectively, spacing includes:
the limiting plate is perpendicular to the moving direction of the cuttings, is arranged at intervals with the heating block and is used for limiting the moving distance of the cuttings, and the limiting plate is provided with wire passing holes with the same number as the cuttings;
the sliding fixing plate is provided with sliding blocks, the number of the sliding blocks is the same as that of the wire passing holes, the sliding direction of the sliding blocks is the same as that of the insertion strips, two ends of each sliding block are provided with a sliding block connecting hole, the sliding block connecting hole at one end penetrates through the corresponding wire passing hole through a connecting wire to be connected with the corresponding insertion strip connecting hole, and the sliding connecting hole at the other end is in insulation connection with the corresponding nickel-titanium alloy memory wire.
7. The digital linear array adjustable sprinkler device of claim 5, wherein: the frame body is made of polytetrafluoroethylene material; and/or
The insulating steering cylinder is made of polytetrafluoroethylene materials or the surface of the insulating steering cylinder is covered with a polytetrafluoroethylene insulating layer.
8. The digital linear array adjustable sprinkler device of claim 6, wherein: the limiting plate and the sliding fixing plate are vertically connected to form an L-shaped structure, and the sliding fixing plate is located on one side, far away from the heating block, of the limiting plate.
9. The digital linear array adjustable sprinkler device of claim 3, wherein: the heating block is also provided with a temperature sensor, and the heating temperature of the heating block is adjusted through the feedback of the temperature sensor.
10. A fused deposition 3D printer, characterized by: comprising a digital linear array adjustable spray head device as claimed in any one of claims 1 to 9.
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| CN202011075123.3A CN112477109A (en) | 2020-10-09 | 2020-10-09 | Fused deposition 3D printer and digital linear array adjustable spray head device thereof |
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| CN202011075123.3A CN112477109A (en) | 2020-10-09 | 2020-10-09 | Fused deposition 3D printer and digital linear array adjustable spray head device thereof |
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