CN112140540A

CN112140540A - Print shower nozzle device suitable for FDM printer

Info

Publication number: CN112140540A
Application number: CN202010980834.9A
Authority: CN
Inventors: 宁子怡
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-12-29

Abstract

The invention relates to the technical field of intelligent manufacturing, and discloses a printing nozzle device suitable for an FDM printer, which comprises a protective shell, wherein two tetrafluoride pipes are fixedly connected inside the protective shell, and the two tetrafluoride pipes are mutually symmetrical by taking a center line of the protective shell in the vertical direction as a symmetry axis. This print shower nozzle device suitable for FDM printer, through the arc tube, one-way through-flow device and extrude the cooperation between the nozzle, and extrude the nozzle and be located the arc tube central line under, adopt two kinds of immiscible materials, and extrude through same extrusion nozzle, the effectual weight of avoiding extruding through two shower nozzles and causing the shower nozzle is too big and the influence beats the phenomenon of printer head stability, the stability of nozzle printing in-process has been improved to extrude, the accuracy of printing product quality has been ensured, through the cooperation between arc tube and the one-way through-flow device, effectively improve the printing effect of printing the shower nozzle device.

Description

Print shower nozzle device suitable for FDM printer

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to a printing spray head device suitable for an FDM printer.

Background

The FDM three-dimensional printer is one of additive manufacturing technologies, can effectively reduce the production flow of products, is easy to form parts with complex shapes, uses materials which are generally thermoplastic materials, such as wax, ABS, nylon and the like, and is fed in a filament shape, the materials are heated and melted in a spray head, the spray head moves along the section contour and the filling track of a part, meanwhile, the melted materials are extruded out, and the extruded materials are rapidly solidified and coagulated with the surrounding previous materials for forming.

FDM printing is a printing mode of completing modeling of a product by using a computer, then dividing a three-dimensional model of the product into a plurality of parallel layers in an equal thickness by using software, then melting materials to correspond to a required layer and stacking and forming the layers, wherein a printing nozzle device is a device for converting solid filamentous materials into a molten state and extruding the molten solid filamentous materials, when some cantilever components are printed, in order to prevent deformation of the cantilever components when the cantilever components are just printed, supporting points are required to be added at the bottoms of the cantilever components, so that a corresponding entity is generally printed by adopting two materials of different materials, and due to different characteristics of the two materials, the part of the materials to be removed after printing and forming is removed by a corresponding solvent, namely a supporting structure which needs to be removed originally, so that the complete shape of the printed cantilever components is kept, and the existing printing device prints the parts by two nozzles, however, when the two nozzles are used for printing, because the nozzles are internally provided with the motor, the fan, the wire feeding device and the like, the weight of the printing head is increased, and when the printing head is in operation, because the gravity is relatively overlarge, and the inertia of the corresponding nozzle is larger, the stability of the printing head is not easy to control when the printing head is in accelerated motion or decelerated motion, so that the accuracy of the quality of a printed product is reduced, and when the double-nozzle is used for printing, because the two printing heads are arranged in parallel, the double-nozzle in parallel occupies more printing space of the printer than a single-nozzle, so that the effective stroke range of the nozzle is reduced, the space area of the printing area is reduced, and because the existing double-nozzle is used for printing through the two printing heads, the two heating devices are required to heat the double-nozzle, however, when the dual-nozzle printing is performed, because one of the printing nozzles prints the area of the required product, and the other printing nozzle prints the area supporting the required product in a semi-suspended state, the two nozzles do not print simultaneously, but the two printing heads perform a complementary mode in the printing working time, so that the two heating devices heat the required product, and the hot air on the nozzle heating device which is not in the printing working state is dissipated, which is not beneficial to fully utilizing energy, and meanwhile, the two heating devices are required to dissipate heat through a fan, so that the operation cost is easily increased, and the weight of the nozzles is easily increased through the two heating devices, so that the stability of the printing heads is influenced.

Disclosure of Invention

The invention provides a printing nozzle device suitable for an FDM printer, which has the advantages of effectively improving the printing effect of the printing nozzle device, effectively ensuring the printed space area and the quality accuracy of printed products, and solves the problems that when the existing printing device is used for preventing a cantilever part from deforming when being printed, the weight of a printing head is increased because a motor, a fan, a wire feeding device and the like are required to be arranged in the nozzle when the cantilever part is printed by two nozzles, and when the printing head is in operation, the inertia of the corresponding nozzle is larger because the gravity is relatively overlarge, so that the stability of the printing head is difficult to control when the printing head is in accelerated motion or decelerated motion, the quality accuracy of the printed products is reduced, and when the printing is carried out by adopting two nozzles, because the two printing heads are arranged together, therefore, the printing space of the printer is occupied by the double parallel nozzles more than that of a single nozzle, so that the effective stroke range of the nozzles is reduced, the space area of a printing area is reduced, the existing double nozzles need to be heated by two heating devices because the existing double nozzles print by two printing heads, but when the double nozzles print, because one printing nozzle prints the area of a required product and the other printing nozzle prints the area corresponding to the required product and supporting the required product in a semi-suspension state, the two nozzles do not print simultaneously, but the two printing heads perform a complementary mode in the printing working time, so that the hot air on the nozzle heating device which is not in the printing work is dissipated by heating by the two heating devices, the energy is not fully utilized, and meanwhile, the heat dissipation needs to be performed by a fan, the operation cost is easily increased, and the weight of the spray head is easily increased through the two heating devices, so that the stability of the printing head is influenced.

In order to achieve the above purpose, the invention provides the following technical scheme to realize: a printing nozzle device suitable for an FDM printer comprises a protective shell, wherein two tetrafluoride pipes are fixedly connected inside the protective shell, the two tetrafluoride pipes are symmetrical to each other by taking a central line in the vertical direction of the protective shell as a symmetry axis, the top of each tetrafluoride pipe penetrates through the protective shell and extends to the upper side of the protective shell, a feeding joint is fixedly connected to the top of each tetrafluoride pipe, an arc-shaped heat collecting ring sleeve is fixedly sleeved at the bottom of an inner cavity of the protective shell, a pushing and extruding device is movably sleeved on the outer side of the arc-shaped heat collecting ring sleeve, a stepping motor is fixedly connected to the middle of the inner cavity of the protective shell, an annular plate is fixedly connected to an output shaft of the stepping motor, linkage devices are fixedly connected to the upper left side and the lower right side of the annular plate, and the two linkage devices are located on the same inclined line, the bottom of the protective shell is fixedly connected with an arc-shaped pipe, the bottom end of the arc-shaped pipe is fixedly sleeved with an extrusion nozzle, the two ends of the inner cavity of the arc-shaped pipe are respectively connected with the bottoms of the two tetrafluoro pipes in a sealing way, the left side and the right side of the inner cavity of the arc-shaped pipe are respectively provided with a one-way through-flow device, the two one-way through-flow devices are mutually symmetrical by taking the central line of the arc-shaped pipe in the vertical direction as a symmetrical axis, the one-way through-flow device comprises a cylinder body, the outer surface of the cylinder body is fixedly connected with the inner wall of the arc-shaped pipe, the right side of the inner cavity of the cylinder body is fixedly connected with a backflow prevention device through a support frame, the inner cavity of the cylinder body is positioned at the left side of the support frame and is fixedly connected with a discharge pipe, the bottom of the discharge pipe is fixedly connected with a protective pad, the outer surface of the protective pad is fixedly connected with the inner wall of the cylinder body, the outer surface of the protective shell is fixedly provided with a heat dissipation aluminum sheet, and the middle part of the lower surface of the arc-shaped pipe is fixedly connected with an extrusion nozzle.

Optionally, the number of the arc-shaped heat collecting ring sleeves is two, the two arc-shaped heat collecting ring sleeves are fixedly connected with the bottom of the outer surface of the tetrafluoride tube, the top of each arc-shaped heat collecting ring sleeve is communicated with the top of the corresponding arc-shaped heat collecting ring sleeve through a communicating tube, the annular plate is located at the central line of the central point connecting line of the two arc-shaped heat collecting ring sleeves, the bottom of the inner cavity of the protective shell is fixedly connected with the temperature sensor, and the temperature sensor is electrically connected with one side, adjacent to the arc-.

Optionally, the linkage device comprises a fixing rod, a sliding groove is formed in the middle of the fixing rod, a linkage column is arranged at one end, away from the annular plate, of the fixing rod, an arc-shaped groove is formed in one end, away from the annular plate, of the linkage column, and the front end and the rear end of the top of the arc-shaped groove inner cavity of the annular plate are respectively movably sleeved with the center points of the front side and the rear side of the outer surface of the pushing extrusion device.

Optionally, the one end that the linkage post is close to the annular plate runs through dead lever and spout in proper order and extends to the inside of spout, the surface of linkage post and the inside swing joint of dead lever, the surface of linkage post and the inner wall swing joint of spout, the dead lever just is located the top and the bottom of spout and has all seted up the spacing groove, two the spacing groove all is parallel to each other with the spout, the stopper has been cup jointed in the inside activity of spacing groove, the top of stopper runs through the dead lever and extends to the inside of spout, the surface of stopper and the inside swing joint of dead lever, the top of stopper and the top fixed connection of linkage post.

Optionally, the backflow preventer is including fixed pipe, the top of fixed pipe and the bottom fixed connection of support frame, T shape pole has been cup jointed in the inside activity of fixed pipe, the bottom of T shape pole runs through fixed pipe and extends to the outside of fixed pipe, the surface of T shape pole and the inside activity that is located fixed pipe have cup jointed the elastic expansion part, the top of elastic expansion part and the top fixed connection of T shape pole, the bottom of elastic expansion part and the bottom fixed connection of fixed intraductal chamber, the right side of fixed pipe is provided with the conical body, the conical body cup joints with the bottom seal of protection pad, the bottom of T shape pole run through the inside of discharging pipe and with the top fixed connection of conical body.

Optionally, propelling movement extrusion device is including the propelling movement crown plate, the air channel has all been seted up to the left and right sides that the propelling movement crown plate is located arc collecting ring cover, two the air channel uses the central line of the vertical direction of arc collecting ring cover to be symmetry each other, annular arc groove has been seted up at the top of propelling movement crown plate, the top fixed mounting of air channel has the ventilative otter board of arc, the upper surface of the ventilative otter board of arc and the bottom fixed connection of propelling movement crown plate annular arc inslot cavity, the well upper portion fixed connection of air channel inner chamber has constant voltage device.

Optionally, the constant pressure device includes an annular plate, a vent hole is formed in the annular plate, a sealing block is hermetically sleeved on the annular plate and above the vent hole, a fixing rod is arranged above the annular plate, the bottom end of the fixing rod penetrates through the sealing block and is fixedly connected with the top of the annular plate, the outer surface of the fixing rod is movably connected with the outer surface of the sealing block, the top of the fixing rod is fixedly connected with the top of the sealing block through an elastic shrinkage component, the inner surface of the elastic shrinkage component is movably connected with the outer surface of the fixing rod, a limiting ventilation device is fixedly connected with the top of the annular plate, the limiting ventilation device includes a limiting annular block, communication holes are formed in the inner wall of the limiting annular block, the number of the communication holes is six, and the distances between every two adjacent six communication holes are equal, the inner surface of the limiting annular block is matched with the outer surface of the sealing block, and the outer surface of the limiting annular block is fixedly connected with the inner surface of the vent groove.

The invention provides a printing spray head device suitable for an FDM printer, which has the following beneficial effects:

1. the printing nozzle device suitable for the FDM printer adopts two immiscible materials through the arc tube, the one-way through-flow device and the extrusion nozzle which is positioned under the central line of the arc tube and is extruded through the same extrusion nozzle, thereby effectively avoiding the phenomenon that the stability of a printing head is influenced by overlarge weight of the nozzle caused by extrusion through two nozzles, improving the stability of the extrusion nozzle in the printing process, ensuring the accuracy of the quality of a printed product, simultaneously effectively ensuring the printed space area through one nozzle, and utilizing the gravity of the material to be larger than the elastic force of the elastic telescopic part through the matching between the arc tube and the one-way through-flow device when the corresponding molten material flows into the arc tube, so as to facilitate the downward pushing of the cone body, thereby the cone body flows out through the gap between the discharging tube and the separated cone body, be convenient for extrude the melting material that corresponds, and because the middle part of conical body is greater than the bottom opening of discharging pipe, avoid then when a through-hole outflow melting material of arc pipe, another through-hole of arc pipe opens the phenomenon that takes place the refluence through the discharging pipe, effectively improves the printing effect of printing the shower nozzle device.

2. The printing nozzle device suitable for the FDM printer comprises a tetrafluoride tube, a pushing and extruding device, an annular plate, a linkage device and a stepping motor, wherein the two arc-shaped heat collecting ring sleeves are communicated by a communicating tube, the annular plate is driven to rotate by the stepping motor, then the linkage device on the left side of the annular plate is driven to push the pushing and extruding device to extrude hot solution in the arc-shaped heat collecting ring sleeves, the hot solution flows into the arc-shaped heat collecting ring sleeves on the right side of the annular plate through the communicating tube, the linkage device on the right side of the annular plate is driven to push the pushing and extruding device to move downwards, so that the hot solution is stored in the space, which is out of the arc-shaped heat collecting ring sleeves on the right side of the annular plate, corresponding filamentous materials in the tetrafluoride tube are heated to a molten state, then the molten materials pass through a one-, through the flow of the hot solution that utilizes arc thermal-arrest ring cover, effectively carry out make full use of to its heat, when reducing the heat and scattering and disappearing, avoid respectively through adding heating device and increase the weight of shower nozzle, stability when effectively guaranteeing to print the shower nozzle device and printing, make full use of heat simultaneously reduces the waste of energy, reduces the operation cost of enterprise, improves the economic benefits of enterprise.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a detailed view of a one-way flow device according to the present invention;

FIG. 3 is an enlarged view of the structure at A in the present invention;

FIG. 4 is a schematic view of the protection pad and the cone of FIG. 2 in a separated state;

FIG. 5 is a schematic view of a detailed structure of the pushing and extruding device of the present invention;

figure 6 is a top view schematic diagram of the spacing vent of figure 5.

In the figure: 1. a protective housing; 2. an arc tube; 3. a one-way through-flow device; 31. a barrel; 32. a backflow prevention device; 321. a fixed tube; 322. an elastic expansion member; 323. a T-shaped rod; 324. a conical body; 33. a discharge pipe; 34. a support frame; 35. a protective pad; 4. a tetrafluoride pipe; 5. an arc-shaped heat collecting ring sleeve; 6. a communicating pipe; 7. pushing the extrusion device; 71. pushing the ring plate; 72. a vent channel; 73. a constant pressure device; 731. an annular plate; 732. a vent hole; 733. an elastic contracting member; 734. fixing the rod; 74. an arc-shaped breathable net plate; 75. a limiting ventilation device; 751. a limiting annular block; 752. a communicating hole; 76. a sealing block; 8. an annular plate; 9. a linkage device; 91. fixing the rod; 92. a chute; 93. a linkage column; 94. a limiting groove; 95. a limiting block; 10. radiating aluminum sheets; 11. a temperature sensor; 12. a stepping motor; 13. an extrusion nozzle; 14. a feed connection.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, a printing nozzle device suitable for an FDM printer includes a protective housing 1, two tetrafluoride pipes 4 are fixedly connected to the interior of the protective housing 1, the two tetrafluoride pipes 4 are symmetrical to each other with a central line of the protective housing 1 in a vertical direction as a symmetry axis, the top of each tetrafluoride pipe 4 penetrates through the protective housing 1 and extends to the upper side of the protective housing 1, the top of each tetrafluoride pipe 4 is fixedly connected with a feeding connector 14, an arc-shaped heat collecting ring sleeve 5 is fixedly sleeved at the bottom of an inner cavity of the protective housing 1 of each tetrafluoride pipe 4, a pushing and extruding device 7 is movably sleeved at the outer side of each arc-shaped heat collecting ring sleeve 5, a stepping motor 12 is fixedly connected to the middle of the inner cavity of the protective housing 1, an annular plate 8 is fixedly connected to an output shaft of the stepping motor 12, and linkage devices 9 are fixedly connected to the upper left side and the lower right side of, the two linkage devices 9 are positioned on the same inclined line, the bottom of the protective shell 1 is fixedly connected with an arc-shaped pipe 2, the bottom of the arc-shaped pipe 2 is fixedly sleeved with an extrusion nozzle 13, two ends of an inner cavity of the arc-shaped pipe 2 are respectively connected with the bottoms of two tetrafluoro pipes 4 in a sealing manner, the left side and the right side of the inner cavity of the arc-shaped pipe 2 are respectively provided with a one-way through-flow device 3, the two one-way through-flow devices 3 are mutually symmetrical by taking a central line of the arc-shaped pipe 2 in the vertical direction as a symmetrical axis, each one-way through-flow device 3 comprises a barrel body 31, the outer surface of the barrel body 31 is fixedly connected with the inner wall of the arc-shaped pipe 2, the right side of the inner cavity of the barrel body 31 is fixedly connected with an anti-backflow device 32 through a support frame 34, the inner cavity of the barrel body 31 is, the protection pad 35 is provided with a conical groove matched with the conical body 324, the outer surface of the protection shell 1 is fixedly provided with a heat radiation aluminum sheet 10, the middle part of the lower surface of the arc tube 2 is fixedly connected with an extrusion nozzle 13, two immiscible materials are adopted and extruded through the same extrusion nozzle 13, the phenomenon that the stability of a printing head is influenced due to overlarge weight of the nozzle caused by extrusion through two nozzles is effectively avoided, the stability of the extrusion nozzle 13 in the printing process is improved, the accuracy of the quality of a printed product is ensured, the printed space area is effectively ensured through one nozzle, through the matching between the arc tube 2 and the one-way through-flow device 3, when the corresponding molten material flows into the interior of the arc tube 2, the gravity of the material is greater than the elastic force of the elastic telescopic part 322, the conical body 324 is convenient to be pushed downwards, and then the material flows out through the discharging tube 33 and the gap between the conical body 324, be convenient for extrude the melting material that corresponds, and because the middle part of conical body 324 is greater than the bottom opening of discharging pipe 33, avoid then when a through-hole outflow melting material of arc pipe 2, another through-hole of arc pipe 2 opens the phenomenon of taking place the refluence through discharging pipe 33, effectively improve the printing effect of printing the shower nozzle device.

Wherein, the number of the arc-shaped heat collecting ring sleeves 5 is two, two arc-shaped heat collecting ring sleeves 5 are fixedly connected with the bottom of the outer surface of the tetrafluoride tube 4, the tops of the two arc-shaped heat collecting ring sleeves 5 are communicated through the communicating tube 6, the annular plate 8 is positioned at the central line of the connecting line of the central points of the two arc-shaped heat collecting ring sleeves 5, the bottom of the inner cavity of the protective shell 1 is fixedly connected with the temperature sensor 11, the temperature sensor 11 is electrically connected with one side adjacent to the arc-shaped heat collecting ring sleeves 5 through a conducting wire, the melted material passes through the one-way through-flow device 3 at the right side in the arc-shaped tube 2 and then flows in through the extrusion nozzle 13, the heat of the one-way through-flow device is effectively and fully utilized by utilizing the flow of the hot solution of the arc-shaped heat collecting ring sleeves 5, the heat, meanwhile, the heat is fully utilized, the energy waste is reduced, the operation cost of an enterprise is reduced, and the economic benefit of the enterprise is improved.

Wherein, the linkage device 9 is including the dead lever 91, spout 92 has been seted up at the middle part of dead lever 91, the one end that annular plate 8 was kept away from to dead lever 91 is provided with linkage post 93, the arc wall has been seted up to the one end that annular plate 8 was kept away from to linkage post 93, the front and back both ends of 8 arc wall inner chambers top of annular plate cup joint with the central point department activity of push extrusion device 7 surface front and back both sides respectively, set up linkage device 9 through the both sides at push extrusion device 7 to utilize the dead lever 91 to the spacing flexible function of linkage post 93, be convenient for drive push extrusion device 7 and carry out upper and lower cyclic motion on arc collecting ring cover 5.

Wherein, one end of the linking column 93 close to the annular plate 8 sequentially penetrates through the fixing rod 91 and the chute 92 and extends to the inside of the chute 92, the outer surface of the linking column 93 is movably connected with the inside of the fixing rod 91, the outer surface of the linking column 93 is movably connected with the inner wall of the chute 92, the fixing rod 91 is provided with a limiting groove 94 at the top and the bottom of the chute 92, the two limiting grooves 94 are parallel to the chute 92, a limiting block 95 is movably sleeved inside the limiting groove 94, the top end of the limiting block 95 penetrates through the fixing rod 91 and extends to the inside of the chute 92, the outer surface of the limiting block 95 is movably connected with the inside of the fixing rod 91, the top end of the limiting block 95 is fixedly connected with the top of the linking column 93, the stepping motor 12 drives the annular plate 8 to rotate, and then the linking device 9 at the left side of the annular plate 8 drives the pushing and extruding device 7 to extrude the hot solution inside the, the material flows into the arc-shaped heat collection ring sleeve 5 on the right side of the annular plate 8 through the communicating pipe 6, and meanwhile, the linkage device 9 on the right side of the annular plate 8 is driven to push the pushing and extruding device 7 to move downwards, so that the heat storage solution is stored in the space where the arc-shaped heat collection ring sleeve 5 on the right side of the annular plate 8 flows out, and the corresponding filamentous material in the tetrafluoride pipe 4 is heated to a molten state.

Wherein, the backflow prevention device 32 comprises a fixed pipe 321, the top of the fixed pipe 321 is fixedly connected with the bottom of the support frame 34, a T-shaped rod 323 is movably sleeved inside the fixed pipe 321, the bottom end of the T-shaped rod 323 penetrates through the fixed pipe 321 and extends to the outer side of the fixed pipe 321, an elastic telescopic part 322 is movably sleeved on the outer surface of the T-shaped rod 323 and is positioned inside the fixed pipe 321, the top end of the elastic telescopic part 322 is fixedly connected with the top of the T-shaped rod 323, the bottom end of the elastic telescopic part 322 is fixedly connected with the bottom of the inner cavity of the fixed pipe 321, a conical body 324 is arranged on the right side of the fixed pipe 321, the conical body 324 is hermetically sleeved with the bottom of the protection pad 35, the bottom end of the T-shaped rod 323 penetrates through the inside of the discharge pipe 33 and is fixedly connected with the top end of the conical body 324, a conical groove matched with the outer surface of the conical body 324 is formed on the, when the cone 324 is completely sleeved with the protective pad 35, a sealed channel is formed, so that the molten material inside is prevented from flowing out, and the molten material outside is prevented from flowing back.

Wherein, propelling movement extrusion device 7 is including propelling movement crown plate 71, the air channel 72 has all been seted up, two to the left and right sides that propelling movement crown plate 71 is located arc collecting ring cover 5 the air channel 72 uses the central line of the vertical direction of arc collecting ring cover 5 to be symmetry each other, annular arc groove has been seted up at propelling movement crown plate 71's top, the top fixed mounting of air channel 72 has the ventilative otter board 74 of arc, the upper surface of the ventilative otter board 74 of arc and the bottom fixed connection of propelling movement crown plate 71 annular arc inslot cavity, the well upper portion fixedly connected with constant voltage equipment 73 of air channel 72 inner chamber utilizes the ventilative otter board 74 of arc to be convenient for when propelling the inside hot liquid of extrusion arc collecting ring cover 5 at propelling movement crown plate 71, avoids arc collecting ring cover 5 to be mingled with in air channel 72, plays the effect of protection to arc collecting ring cover 5.

Wherein the constant pressure device 73 comprises an annular plate 731, a vent hole 732 is formed in the annular plate 731, a sealing block 76 is hermetically sleeved on the annular plate 731 and positioned above the vent hole 732, a fixing rod 734 is arranged above the annular plate 731, the bottom end of the fixing rod 734 penetrates through the sealing block 76 and is fixedly connected with the top of the annular plate 731, the outer surface of the fixing rod 734 is movably connected with the outer surface of the sealing block 76, the top of the fixing rod 734 is fixedly connected with the top of the sealing block 76 through an elastic shrinkage component 733, the inner surface of the elastic shrinkage component 733 is movably connected with the outer surface of the fixing rod 734, a limiting ventilation device 75 is fixedly connected with the top of the annular plate 731, the limiting ventilation device 75 comprises a limiting annular block 751, communication holes 752 are formed in the inner wall of the limiting annular block 751, and the number of the communication holes 752 is six, the distances between every two adjacent six communication holes 752 are equal, the inner surface of the limiting ring-shaped block 751 is matched with the outer surface of the sealing block 76, the outer surface of the limiting ring-shaped block 751 is fixedly connected with the inner surface of the vent groove 72, and when the pushing and extruding device 7 slides downwards, the pressure at the bottom of the vent groove 72 is greater than the downward elastic force of the elastic shrinkage component 733, so that the sealing block 76 is pushed to slide upwards, the pressure at the bottom is conveniently relieved through the vent holes 732 and the communication holes 752, and the pressure balance is kept.

Working steps, firstly, a worker fixes the protective shell 1 on a corresponding printer, keeps two feeding connectors 14 corresponding to corresponding discharge ports, then drives the annular plate 8 to rotate by clockwise starting the stepping motor 12 and rotating by one hundred eighty degrees, then drives the linkage device 9 on the left side of the annular plate 8 to push the pushing and extruding device 7 to extrude hot solution in the arc-shaped heat collecting ring sleeve 5, flows the hot solution into the arc-shaped heat collecting ring sleeve 5 on the right side of the annular plate 8 through the communicating pipe 6, simultaneously drives the linkage device 9 on the right side of the annular plate 8 to push the pushing and extruding device 7 to move downwards, is convenient for flowing out space storage solution from the arc-shaped heat collecting ring sleeve 5 on the right side of the annular plate 8, is convenient for heating corresponding filamentous materials in the tetrafluoro tube 4 to a molten state, and then the molten materials pass through the one-way through-flow device 3 on the right side in the arc-shaped tube, through the flow of the hot solution that utilizes arc collecting ring cover 5, effectively carry out make full use of to its heat, when reducing the heat and scatter and disappear, avoid increasing the weight of shower nozzle through adding two heating device, stability when effectively guaranteeing to print the shower nozzle device and printing, when needs utilize another kind of material to print, only need to start step motor 12 and drive annular plate 8 anticlockwise rotation one hundred eighty degrees alright.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A print head device suitable for FDM printers, comprising a protective casing (1), characterized in that: the inner part of the protection shell (1) is fixedly connected with two tetrafluoride tubes (4), the two tetrafluoride tubes (4) are symmetrical with each other by taking a central line of the vertical direction of the protection shell (1) as a symmetry axis, the top of each tetrafluoride tube (4) penetrates through the protection shell (1) and extends to the upper part of the protection shell (1), the top of each tetrafluoride tube (4) is fixedly connected with a feeding joint (14), the bottom of the inner cavity of the protection shell (1) of each tetrafluoride tube (4) is fixedly sleeved with an arc-shaped heat collecting ring sleeve (5), the outer side of each arc-shaped heat collecting ring sleeve (5) is movably sleeved with a pushing and extruding device (7), the middle part of the inner cavity of the protection shell (1) is fixedly connected with a stepping motor (12), an output shaft of the stepping motor (12) is fixedly connected with an annular plate (8), and linkage devices (9) are fixedly connected to the upper left side and the lower side of the annular plate, the two linkage devices (9) are positioned on the same inclined line, the bottom of the protective shell (1) is fixedly connected with an arc-shaped pipe (2), the bottom of the arc-shaped pipe (2) is fixedly sleeved with an extrusion nozzle (13), two ends of the inner cavity of the arc-shaped pipe (2) are respectively in sealing connection with the bottoms of two tetrafluoro pipes (4), the left side and the right side of the inner cavity of the arc-shaped pipe (2) are respectively provided with a one-way through-flow device (3), the two one-way through-flow devices (3) are mutually symmetrical by taking the central line of the arc-shaped pipe (2) in the vertical direction as a symmetrical axis, each one-way through-flow device (3) comprises a barrel body (31), the outer surface of the barrel body (31) is fixedly connected with the inner wall of the arc-shaped pipe (2), the right side of the inner cavity of the barrel body (31) is fixedly connected with a backflow prevention device (32) through, the bottom fixedly connected with protection of discharging pipe (33) fills up (35), the surface of protection pad (35) and the inner wall fixed connection of barrel (31), the outer fixed surface of protective housing (1) installs heat dissipation aluminum sheet (10), nozzle (13) are extruded to the middle part fixedly connected with of arc pipe (2) lower surface.

2. A print head apparatus suitable for use in an FDM printer in claim 1 wherein: the quantity of arc thermal-arrest ring cover (5) is two, two the bottom fixed connection of arc thermal-arrest ring cover (5) and tetrafluoro pipe (4) surface, two the top of arc thermal-arrest ring cover (5) is link up mutually through communicating pipe (6), annular plate (8) are located the central line department of two arc thermal-arrest ring cover (5) central point lines, the bottom fixedly connected with temperature sensor (11) of protective housing (1) inner chamber, temperature sensor (11) are connected through the wire electricity with the adjacent one side of arc thermal-arrest ring cover (5).

3. A print head apparatus suitable for use in an FDM printer in claim 1 wherein: linkage device (9) are including dead lever (91), spout (92) have been seted up at the middle part of dead lever (91), the one end that annular plate (8) were kept away from in dead lever (91) is provided with linkage post (93), the arc wall has been seted up to the one end that annular plate (8) were kept away from in linkage post (93), both ends connect with the central point department activity of both sides around propelling movement extrusion device (7) surface respectively around annular plate (8) arc wall inner chamber top.

4. A print head apparatus suitable for use in an FDM printer in claim 3 wherein: one end of the linkage column (93) close to the annular plate (8) sequentially penetrates through the fixing rod (91) and the sliding groove (92) and extends to the inside of the sliding groove (92), the outer surface of the linkage column (93) is movably connected with the inside of the fixed rod (91), the outer surface of the linkage column (93) is movably connected with the inner wall of the sliding groove (92), the fixed rod (91) is provided with limit grooves (94) at the top and the bottom of the sliding groove (92), the two limit grooves (94) are parallel to the sliding groove (92), a limiting block (95) is movably sleeved in the limiting groove (94), the top end of the limiting block (95) penetrates through the fixing rod (91) and extends into the sliding groove (92), the outer surface of the limiting block (95) is movably connected with the inside of the fixing rod (91), the top end of the limiting block (95) is fixedly connected with the top of the linkage column (93).

5. A print head apparatus suitable for use in an FDM printer in claim 1 wherein: the backflow prevention device (32) comprises a fixed pipe (321), the top of the fixed pipe (321) is fixedly connected with the bottom of the support frame (34), a T-shaped rod (323) is movably sleeved in the fixed pipe (321), the bottom end of the T-shaped rod (323) penetrates through the fixed pipe (321) and extends to the outer side of the fixed pipe (321), an elastic telescopic part (322) is movably sleeved on the outer surface of the T-shaped rod (323) and positioned in the fixed pipe (321), the top end of the elastic telescopic part (322) is fixedly connected with the top of the T-shaped rod (323), the bottom end of the elastic telescopic part (322) is fixedly connected with the bottom of the inner cavity of the fixed tube (321), the right side of the fixed pipe (321) is provided with a conical body (324), the conical body (324) is hermetically sleeved with the bottom of the protective pad (35), the bottom end of the T-shaped rod (323) penetrates through the interior of the discharge pipe (33) and is fixedly connected with the top end of the conical body (324).

6. A print head apparatus suitable for use in an FDM printer in claim 1 wherein: propelling movement extrusion device (7) has all seted up air channel (72), two including propelling movement crown plate (71), air channel (72) have all been seted up to the left and right sides that propelling movement crown plate (71) are located arc collecting heat ring cover (5) central line that arc collecting heat ring cover (5) vertical direction was symmetry each other in air channel (72), annular arc groove has been seted up at the top of propelling movement crown plate (71), the top fixed mounting of air channel (72) has arc otter board (74) of breathing freely, the upper surface of arc otter board (74) and the bottom fixed connection of propelling movement crown plate (71) annular arc inslot cavity, the well upper portion fixed connection of air channel (72) inner chamber has constant voltage device (73).

7. A print head apparatus suitable for use in an FDM printer according to claim 6 wherein: the constant pressure device (73) comprises an annular plate (731), a vent hole (732) is formed in the annular plate (731), a sealing block (76) is sleeved on the annular plate (731) and positioned above the vent hole (732) in a sealing manner, a fixing rod (734) is arranged above the annular plate (731), the bottom end of the fixing rod (734) penetrates through the sealing block (76) and is fixedly connected with the top of the annular plate (731), the outer surface of the fixing rod (734) is movably connected with the outer surface of the sealing block (76), the top of the fixing rod (734) is fixedly connected with the top of the sealing block (76) through an elastic shrinkage component (733), the inner surface of the elastic shrinkage component (733) is movably connected with the outer surface of the fixing rod (734), a limiting ventilation device (75) is fixedly connected with the top of the annular plate (731), and the limiting ventilation device (75) comprises a limiting annular block (751), the inner wall of the limiting annular block (751) is provided with six communication holes (752), the distance between every two adjacent six communication holes (752) is equal, the inner surface of the limiting annular block (751) is matched with the outer surface of the sealing block (76), and the outer surface of the limiting annular block (751) is fixedly connected with the inner surface of the vent groove (72).