CN107127963B - Bore-adjustable 3D printer nozzle - Google Patents
Bore-adjustable 3D printer nozzle Download PDFInfo
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- CN107127963B CN107127963B CN201710528915.3A CN201710528915A CN107127963B CN 107127963 B CN107127963 B CN 107127963B CN 201710528915 A CN201710528915 A CN 201710528915A CN 107127963 B CN107127963 B CN 107127963B
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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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Abstract
The invention discloses a 3D printer nozzle with an adjustable caliber, which comprises a support body, wherein a melting mechanism, a power supply device and a nozzle assembly are arranged on the support body, the melting mechanism is used for filling consumable materials in a melting state into the nozzle assembly, a shifting mechanism is also arranged between the power supply device and the nozzle assembly, a power output end of the power supply device is connected with a power input end of the shifting mechanism, and a power output end of the shifting mechanism is connected with the nozzle assembly and can adjust the shape or the size of the cross section of a material spraying end of the nozzle assembly; according to the invention, the shape or size of the cross section of the material spraying end of the spray head assembly is automatically adjusted by the power provided by the power supply device, so that the printing requirements of different target models are met, the printing efficiency is improved, and the printing time is shortened.
Description
Technical Field
The invention relates to a 3D printer, in particular to a 3D printer capable of automatically adjusting the caliber of a spray head.
Background
The existing 3D printers all adopt a single-nozzle working mode to print target models, and the shape and size difference of various target models cannot be adjusted due to the fixed cross-sectional shape of a single nozzle, so that the adaptability adjustment cannot be performed according to the shape or size of the target models; for example, when a planar plate is printed, the printing efficiency can be remarkably improved by increasing the caliber of the nozzle, the amount of melting consumables sprayed by the existing fixed-caliber nozzle is relatively small, and if a nozzle with a larger caliber is adopted, the printing time can be remarkably reduced; when printing a precise part or a small part with a small size, the accuracy of the target model is seriously influenced by overlarge caliber of the spray head, and only the spray head with a small section size can be adopted.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the 3D printer capable of adjusting the cross section size of the spray head according to the shape and size of the target model, so that the printing efficiency is improved, the printing time is shortened, and the printing precision of the 3D printer can be ensured.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.
Bore adjustable 3D print head, it includes the supporter, installs melting mechanism, power supply unit, shower nozzle subassembly on the supporter, and melting mechanism is used for pouring into the consumptive material of molten condition in to the shower nozzle subassembly, still is provided with toggle mechanism between power supply unit and the shower nozzle subassembly, and power supply unit's power take off end is connected with toggle mechanism's power input end, and toggle mechanism's power take off end is connected with the shower nozzle subassembly and the material spraying end cross-section shape or the size of adjustable shower nozzle subassembly.
The nozzle assembly comprises a nozzle body, a material gathering cavity used for gathering consumable materials in a molten state is arranged in the nozzle body, and the consumable materials in the molten state can be injected into the material gathering cavity by the melting mechanism; the spray head assembly also comprises two sliding pieces which are respectively arranged on one side of the spray head body in a sliding manner, the two sliding pieces are arranged to extend outwards relative to the central line of the spray head body and narrow towards the center relative to the central line of the spray head, and the power output end of the toggle mechanism is connected with the sliding pieces and provides power for switching the sliding pieces between an extending state and a retracting state; when the two sliding sheets are switched between the extension state and the contraction state, the shape or the size of the cross section of the material spraying end of the nozzle body can be adjusted.
The technical scheme is further improved.
The two sliding sheets are symmetrically arranged on one side of the spray head body, and the two sliding sheets synchronously extend outwards relative to the central line of the spray head body and synchronously narrow towards the center relative to the central line of the spray head.
The technical scheme is further improved.
The gleitbretter includes interconnect's horizontal segment, vertical section, and the opening direction that constitutes between horizontal segment and the vertical section is skew in the central line of shower nozzle body, and the vertical section of two gleitbretters constitutes the spout mouth towards the interval between the terminal surface of the central line of shower nozzle body, and the horizontal segment of two gleitbretters and the inner wall sliding contact of shower nozzle body, and melting mechanism injects the consumptive material of molten condition into to gathering in the material cavity and extrude by the spout mouth.
The technical scheme is further improved.
The gleitbretter still includes the slope linkage segment, and the slope linkage segment sets up between horizontal segment, vertical section and is used for connecting horizontal segment, vertical section, encloses the material collecting cavity of synthesizing and spout mouth switch-on between the slope linkage segment of two gleitbretters towards interval, the shower nozzle body inner wall between the terminal surface of the central line of shower nozzle body, and melting mechanism injects the consumptive material of molten condition into to material collecting cavity and extrude by the spout mouth.
The technical scheme is further improved.
The vertical section of the slip sheet faces to the side face of the central line of the spray head body and is provided with a material guiding groove which is arranged in the vertical direction.
The technical scheme is further improved.
When two gleitbretters are in the shrink state, set up and enclose into a cross-section for circular shape spout in the material recess that draws on the vertical section of two gleitbretters.
The technical scheme is further improved.
The interval between the inclined connecting sections of the two sliding sheets is gradually increased from bottom to top in the vertical direction, and the inclined connecting sections are provided with guide grooves along the extending direction of the inclined connecting sections.
The technical scheme is further improved.
The nozzle body is also provided with a connecting section which is communicated with the material gathering cavity and is used for injecting the molten consumable materials into the material gathering cavity, and the connecting section used for injecting the molten consumable materials into the material gathering cavity is connected with the discharge end of the melting mechanism; the connecting section and the nozzle body are coaxially arranged, a conical groove is arranged at the connecting position of the nozzle body and the discharge end of the connecting section, and the transverse intervals of the conical groove are gradually narrowed from bottom to top in the vertical direction.
The technical scheme is further improved.
Two open grooves communicated with the material gathering cavity are respectively formed in two sides of the sprayer body, the two open grooves are symmetrically arranged about the center line of the sprayer body, sliding pieces respectively arranged on one side of the sprayer body are matched with the open grooves in a sliding mode, and the two sliding pieces can extend outwards relative to the center line of the sprayer body and narrow towards the center relative to the center line of the sprayer body in the sliding process of the two sliding pieces in the open grooves.
The technical scheme is further improved.
The opening groove is internally provided with a guide groove which is matched with the sliding piece and is used for guiding the sliding piece to slide along the horizontal direction, and the sliding piece is provided with a guide block matched with the guide groove.
The technical scheme is further improved.
The shape of foretell guide slot is right trapezoid, and the shape of guide block is the right trapezoid with guide slot assorted, and the upper surface of gleitbretter slides with the upper inner wall of open slot and matches, and right trapezoid's high limit is horizontal arrangement and is used for the motion of direction gleitbretter on the horizontal direction.
The technical scheme is further improved.
The spray nozzle body is further provided with a pin located in the open slot, the sliding piece is further provided with a sliding groove matched with the pin, when the sliding piece extends outwards relative to the central line of the spray nozzle body, and the guide slot is separated from the guide block, the pin is matched with the sliding groove, and when the pin is in contact with the bottom of the sliding groove, the sliding piece can be restrained to continue to extend outwards.
The technical scheme is further improved.
The poking mechanism comprises a poking sheet which is arranged on the supporting body and can rotate around the axis of the poking sheet, two ends of the poking sheet are respectively hinged with a poking rod, the other ends of the two poking rods are respectively hinged with one end of a guide sheet which is arranged on the supporting body and can rotate around the axis of the poking sheet, the guide sheet and the two poking rods form a four-bar mechanism, and the two poking rods are parallel to each other; the plectrum is connected in power supply unit's power take off end, and the guide vane cup joints in the outside of shower nozzle body, and power supply unit provides power to the plectrum is used for driving the plectrum to take place the beat along clockwise and along anticlockwise, and the plectrum can apply to the gleitbretter and promote the gleitbretter outwards to extend or to the effort that the center narrowed.
The technical scheme is further improved.
The end side of the slip sheet deviating from the center line of the sprayer body is provided with a shifting column arranged in the vertical direction, the two sides of the guide sheet are respectively provided with arc guide grooves matched with the shifting column, and the pair of arc guide grooves can push the pair of slip sheets to move towards the center line of the sprayer body or deviate from the center line of the sprayer body along the guide direction of the open slot.
The technical scheme is further improved.
The melting mechanism is provided with a melting channel for melting the consumable materials, the feeding end of the melting channel is provided with a wiring sleeve for conveying the consumable materials into the melting channel, the discharging end of the melting channel is communicated with the connecting section arranged on the nozzle body, and the melting mechanism is further provided with a heating element for providing heat energy required by melting the consumable materials in the melting channel.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural view of the melting mechanism.
Fig. 4 is a schematic structural diagram of the power supply device, the spray head assembly and the toggle mechanism which are matched.
Fig. 5 is a schematic structural view of the toggle mechanism matching with the support body.
Fig. 6 is a schematic structural view of the support body.
Fig. 7 is a schematic structural view of the support body.
Fig. 8 is a schematic structural diagram of the toggle mechanism matching with the support body and the spray head assembly.
Fig. 9 is a schematic structural diagram of the toggle mechanism.
Fig. 10 is a schematic structural view of the toggle mechanism.
Fig. 11 is a structural view illustrating a state in which the showerhead assembly is maximally opened.
Fig. 12 is a schematic structural view of the showerhead assembly in a middle open state.
Fig. 13 is a structural view of the showerhead assembly in a minimum opening state.
Fig. 14 is a schematic structural view of the head body.
FIG. 15 is a schematic view of a slider structure.
Labeled as:
10. a melting mechanism; 110. a heating element; 120. a discharge hole;
20. a wiring sleeve;
30. a power supply device;
40. a showerhead assembly; 410. a nozzle body; 410a, a connecting section; 410b, a material gathering chamber; 410c, a material spraying opening; 410d, a guide groove; 420. sliding blades; 420a, a material guiding groove; 420b, a poking column; 420c, a guide block; 420d, a chute; 430. a pin;
50. a toggle mechanism; 510. a shifting sheet; 520. a deflector rod; 530. a guide piece; 530a, a steering hole; 530b, a guide groove;
60. a support body; 610. a ring groove a; 620. a ring groove b; 630. a trench; 640. a central bore; 650. positioning the notch; 660. and (4) guiding the notch.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the aperture-adjustable 3D printer nozzle includes a support 60, a melting mechanism 10, a power supply device 30, and a nozzle assembly 40 are mounted on the support 60, the melting mechanism 10 is used for filling consumable materials in a molten state into the nozzle assembly 40, a toggle mechanism 50 is further disposed between the power supply device 30 and the nozzle assembly 40, the power supply device 30 is connected with a power input end of the toggle mechanism 50, a power output end of the toggle mechanism 50 is connected with the nozzle assembly 40, and a shape or size of a cross section of a material spraying end of the nozzle assembly 40 can be adjusted; according to the invention, the shape or size of the cross section of the material spraying end of the spray head assembly 40 is automatically adjusted by the power supplied by the power supply device 30, so that the printing requirements of different target models are met, the printing efficiency is improved, and the printing time is shortened.
The nozzle assembly 40 includes a nozzle body 410, the nozzle body 410 is fixedly disposed on the support 60, a material gathering chamber 410b for gathering the molten consumables is disposed in the nozzle body 410, and the molten consumables can be injected into the material gathering chamber 410b by the melting mechanism 10; the showerhead assembly 40 further includes a sliding piece 420 slidably disposed at one side of the showerhead body 410, the sliding piece 420 is disposed to be capable of extending outward relative to a center line of the showerhead body 410 and narrowing toward the center relative to the center line of the showerhead body 410, and a power output end of the toggle mechanism 50 is connected to the sliding piece 420 and provides power for switching the sliding piece 420 between an extended state and a retracted state; when the sliding piece 420 is switched between the extended state and the retracted state, the cross-sectional shape or size of the spraying end of the nozzle body 410 can be adjusted. The scheme adopts a single-sliding-piece structure (a specific structure is not shown in the drawing), and by adopting the structure, the sliding piece 420 can cause the center of the nozzle end of the nozzle body 410 to deviate in the displacement process, and in order to offset the error of the center deviation, a control system of the 3D printer is required to adjust the nozzle of the 3D printer to correspondingly deviate and offset the error, so that the error can be completely ignored without adjustment, for example, the food model is printed under the condition of low precision requirement of the target model.
Referring to fig. 11-15, the two sliding pieces 420 are respectively slidably disposed at one side of the showerhead body 410, and the two sliding pieces 420 are disposed to be capable of extending outward relative to the center line of the showerhead body 410 and being capable of narrowing toward the center relative to the center line of the showerhead body 410; the power output end of the toggle mechanism 50 is connected to the two sliding pieces 420 and provides power for switching the two sliding pieces 420 between the extension state and the contraction state; when the two sliding pieces 420 are switched between the extended state and the retracted state, the cross-sectional shape or size of the material spraying end of the nozzle body 410 can be adjusted.
More perfectly, the two sliding pieces 420 are symmetrically disposed at one side of the showerhead body 410, and the two sliding pieces 420 synchronously extend outward relative to the center line of the showerhead body 410 and synchronously narrow toward the center relative to the center line of the showerhead body 410. The scheme adopts a double-sliding-piece type structure, and has the advantages that the two sliding pieces are synchronously outwards extended and synchronously narrowed towards the center, the central position of the nozzle end of the nozzle body 410 is always kept unchanged, the control system is not required to adjust the 3D printer nozzle for error elimination, and the double-sliding-piece type structure is particularly suitable for printing of high-precision target models. When the interval of the nozzle ends formed between the two sliding sheets is three times of the section of the conventional nozzle, the structure of the invention can improve the efficiency by three times, only one third of printing time needs to be consumed, and the problems that the 3D printer consumes long time and is difficult to be accepted by customers at present are solved.
Referring to fig. 11 to 15, two open grooves communicating with the material collecting chamber 410b are respectively formed at both sides of the showerhead body 410, and the two open grooves are symmetrically arranged with respect to the center line of the showerhead body 410, and the slide pieces 420 respectively formed at one side of the showerhead body 410 are slidably engaged with the open grooves, and the two slide pieces 420 can extend outward with respect to the center line of the showerhead body 410 and narrow toward the center with respect to the center line of the showerhead body 410 during the sliding process in the open grooves; a guide groove 410d matched with the slide plate 420 and used for guiding the slide plate 420 to slide along the horizontal direction is arranged in the opening groove, and a guide block 420c matched with the guide groove 410d is arranged on the slide plate 420.
More perfectly, referring to fig. 14 and 15, the above-mentioned guide groove 410d is shaped like a right trapezoid, the guide block 420c is shaped like a right trapezoid matching the guide groove 410d, the upper surface of the slide slidably matches the upper inner wall of the open groove, and the height side of the right trapezoid is horizontally arranged and used for guiding the movement of the slide 420 in the horizontal direction.
More perfectly, referring to fig. 14 and 15, the injector head body 410 is further provided with a pin 430 located in the open slot, the slide 420 is further provided with a sliding slot 420d matching with the pin 430, when the slide 420 extends outwards relative to the central line of the injector head body 410, and the guide slot 410d is separated from the guide block 420c, the pin 430 matches with the sliding slot 420d, and the pin 430 contacts with the bottom of the sliding slot 420d, so as to restrict the slide 420 from extending outwards.
Referring to fig. 11-15, the sliding pieces 420 include a horizontal section, a vertical section, and an inclined connecting section, the inclined connecting section is disposed between the horizontal section and the vertical section and is used for connecting the horizontal section and the vertical section, an opening direction formed between the horizontal section and the vertical section deviates from a center line of the nozzle body 410, a material spraying opening 410c is formed by an interval between end surfaces of the vertical sections of the two sliding pieces 420 facing the center line of the nozzle body 410, an interval between end surfaces of the inclined connecting sections of the two sliding pieces 420 facing the center line of the nozzle body 410, and a material collecting cavity communicated with the material spraying opening 410c is enclosed between inner walls of the nozzle body 410, and the melting mechanism 10 injects the consumable material in a molten state into the material collecting cavity and extrudes the consumable material from the material spraying opening; when the two sliding sheets 420 extend outwards, the aperture of the material spraying port 410c is gradually increased; when the two sliding pieces 420 are contracted toward the center of the nozzle body 410, the aperture of the nozzle 410c is gradually reduced.
More perfectly, when the two sliding sheets 420 are in a contraction state, the vertical sections of the two sliding sheets 420 are tightly attached to the side surface of the central line of the nozzle body 410, so that the nozzle 410c is in a closed state, and the material collection cavity forms a closed space; the aim and the advantages to be achieved by the method are that when the existing 3D printer nozzle moves to a large extent, molten consumables seep out from the 3D printer nozzle, so that a wire drawing phenomenon occurs, and the main reason is that the nozzle cannot be effectively blocked; the closed structure adopted in the invention can effectively plug the 3D printer nozzle without generating wire drawing phenomenon.
More specifically, referring to fig. 11-15, a material guiding groove is formed in a side surface of the vertical section of the sliding piece 420 facing the center line of the nozzle body 410, and the material guiding groove is arranged in a vertical direction; preferably, when the two sliding pieces 420 are in a contracted state, the material guiding grooves arranged on the vertical sections of the two sliding pieces 420 are enclosed to form a material spraying opening 410c with a circular section; the aim and the advantages to be achieved by the method are that the material spraying opening 410c which is formed by the two material guiding grooves and is circular in cross section is the smallest in size, the method can be suitable for printing of a high-precision target model, and the problem that the material spraying opening 410c is too large in size and cannot be suitable for printing of a high-precision object is solved.
More perfectly, referring to fig. 11-13, the interval between the inclined connecting sections of the two sliding pieces 420 gradually increases from bottom to top in the vertical direction, and the inclined connecting sections are provided with guiding grooves 420 along the extending direction thereof; the funnel-shaped cavity formed by the two inclined connecting sections at intervals is convenient for gathering materials, when the material spraying opening 410c extends to a larger interval, the funnel-shaped cavity can further ensure that the molten consumable materials are completely filled in the material spraying opening 410c, and bubbles or faults can be avoided.
More specifically, referring to fig. 11 to 14, the nozzle body 410 is further provided with a connecting section 410a communicating with the polymer chamber 410b and used for injecting molten consumable material into the polymer chamber 410b, and the connecting section 410a is connected to the discharge end of the melting mechanism 10.
Preferably, the connecting section 410a and the nozzle body 410 are coaxially arranged, a tapered groove is arranged at the connecting position of the nozzle body 410 and the discharge end of the connecting section 410a, and the tapered groove is gradually narrowed at the transverse interval from bottom to top in the vertical direction; the tapered groove and the inclined connecting sections of the two sliding sheets are corresponding to each other in interval which is gradually increased from bottom to top in the vertical direction, so that the material spraying port 410c in an extending state is better filled with molten consumable materials, and dead angles are avoided.
Referring to fig. 8-10, the toggle mechanism 50 includes a toggle piece 510 mounted on the supporting body 60 and capable of rotating around its own axis, two ends of the toggle piece 510 are respectively hinged with a toggle rod 520, the other ends of the two toggle rods 520 are respectively hinged with one end of a guide piece 530 mounted on the supporting body 60 and capable of rotating around its own axis, the toggle piece 510, the guide piece 530 and the two toggle rods 520 form a four-bar mechanism, and the two toggle rods 520 are parallel to each other; the shifting piece 510 is connected to a power output end of the power supply device 30, the guide piece 530 is sleeved outside the spray head body 410, and power provided by the power supply device 30 to the shifting piece 510 is used for driving the shifting piece 510 to deflect in the clockwise direction and the anticlockwise direction; more preferably, a turning hole 530a matched with the outer wall of the shower head body 410 is provided at the center of the shower head body 410. When the power supply device 30 drives the shifting piece 510 to swing clockwise or counterclockwise, the two shifting rods 520 transmit power, so that the guide piece 530 can swing synchronously.
Referring to fig. 8-13, the end of the sliding piece 420 that deviates from the center line of the nozzle body 410 is provided with a vertical shifting post 420b, the guiding piece 530 is provided with a circular guiding groove 530b that matches with the shifting post 420b, and the matching of the guiding groove 530b and the shifting post 420b can push the sliding piece 420 to move along the guiding direction of the opening groove towards the center line of the nozzle body 410 or the direction that deviates from the center line of the nozzle body 410.
More preferably, arc guide grooves 530b are respectively formed at both sides of the guide piece 530 to match with the shift posts 420b, and the pair of arc guide grooves 530b may push the pair of sliders 420 to move toward the center line of the showerhead body 410 or in a direction deviating from the center line of the showerhead body 410 in synchronization with the guide direction of the open groove. When the guide piece 530 deflects clockwise or counterclockwise around its axis, the arc guide groove 530b of the guide piece 530 and the shifting post 420b provide a force, so that the pair of sliding pieces 420 can move towards the center line of the nozzle body 410 or away from the center line of the nozzle body 410 synchronously along the guide direction of the opening slot, thereby changing the size of the opening of the nozzle 410 c.
The melting mechanism 10 is provided with a melting channel for melting the consumable materials, a wire sleeve 20 for feeding the consumable materials into the melting channel is arranged at a feeding end of the melting channel, a discharging end of the melting channel is communicated with a connecting section 410a arranged on the nozzle body 410, and the melting mechanism 10 is further provided with a heating element 110 for providing heat energy required by melting the consumable materials in the melting channel. More preferably, the wire sleeve 20 is provided with a sheet-shaped heat sink for cooling, so as to reduce the temperature of the consumables in the wire sleeve 20 and prevent the consumables in the wire sleeve 20 from melting or softening.
Referring to fig. 4 to 8, the supporting body 60 is provided with a circular groove a610 for mounting the pick 510, the supporting body 60 is further provided with a circular groove b620 for mounting the guide piece 530, the circular groove a610 is collinear with the rotation center of the pick 510, the circular groove b620 is collinear with the rotation center of the guide piece 530, and the power output end of the power supply device 30 is connected to the center of the pick 510 and collinear with the rotation center of the pick 510.
Referring to fig. 5 and 6, the supporting body 60 is further provided with a groove 630 communicating the cavity of the annular groove a610 and the cavity of the annular groove b620 and used for the rod 520 to pass through.
Referring to fig. 6 and 7, a central hole 640 is formed in the center of the annular groove b620, through which the connecting section 410a passes and is matched with the outer wall of the nozzle body 410, positioning notches 650 are formed in the annular groove b620, the positioning notches are respectively located on two sides of the central hole 640 and are communicated with the central hole 640, the two positioning notches 650 are distributed along the radial direction of the central hole 640, the connecting line of the center lines of the two positioning notches 650 is connected with the center of the annular groove a610, the connecting line of the centers of the ring grooves b620 is vertical, the ring grooves b620 are further provided with guide notches 660 which are positioned at two sides of the central hole 640 and outside the positioning notches 650, the guide notches 660 are communicated with the positioning notches 650, the central lines of the guide notches 660 and the central lines of the positioning notches 650 are collinear, the sprayer body 410 is provided with a protruding block matched with the positioning notches 650, and the sliding piece 420 is matched with the guide notches 660 and moves along the radial direction of the central hole 640 along the guide direction of the guide notches 660. The cooperation of the showerhead body 410 and the pair of positioning notches 650 restricts the position of the showerhead body 410 and the showerhead body 410 cannot rotate around its axis, and the guide notch 660 can further stabilize the motion state of the slider 420.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention; various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. The caliber-adjustable 3D printer nozzle is characterized by comprising a support body, wherein a melting mechanism, a power supply device and a nozzle assembly are mounted on the support body, the melting mechanism is used for filling consumable materials in a melting state into the nozzle assembly, a shifting mechanism is further arranged between the power supply device and the nozzle assembly, a power output end of the power supply device is connected with a power input end of the shifting mechanism, a power output end of the shifting mechanism is connected with the nozzle assembly, and the shape or the size of the cross section of a material spraying end of the nozzle assembly can be adjusted;
the nozzle assembly comprises a nozzle body, a material gathering cavity used for gathering consumable materials in a molten state is arranged in the nozzle body, and the consumable materials in the molten state can be injected into the material gathering cavity by the melting mechanism; the spray head assembly also comprises two sliding pieces which are respectively arranged on one side of the spray head body in a sliding manner, the two sliding pieces are arranged to extend outwards relative to the central line of the spray head body and narrow towards the center relative to the central line of the spray head, and the power output end of the toggle mechanism is connected with the sliding pieces and provides power for switching the sliding pieces between an extending state and a retracting state; when the two sliding sheets are switched between the extension state and the contraction state, the shape or the size of the cross section of the material spraying end of the nozzle body can be adjusted;
the two sliding sheets are symmetrically arranged on one side of the spray head body, and the two sliding sheets synchronously extend outwards relative to the central line of the spray head body and synchronously narrow towards the center relative to the central line of the spray head;
the slip sheets comprise a horizontal section and a vertical section which are connected with each other, the opening direction formed between the horizontal section and the vertical section deviates from the central line of the spray head body, the vertical sections of the two slip sheets form a spray port towards the interval between the end surfaces of the central line of the spray head body, the horizontal sections of the two slip sheets are in sliding contact with the inner wall of the spray head body, and the melting mechanism injects the consumable materials in a molten state into the material gathering cavity and extrudes the consumable materials through the spray port;
the slip sheets further comprise inclined connecting sections, the inclined connecting sections are arranged between the horizontal sections and the vertical sections and are used for connecting the horizontal sections and the vertical sections, the inclined connecting sections of the two slip sheets are towards the interval between the end faces of the central line of the nozzle body, a material collecting cavity communicated with the material spraying port is enclosed between the inner walls of the nozzle body, and the melting mechanism injects the consumable materials in a molten state into the material collecting cavity and extrudes the consumable materials through the material spraying port;
the interval between the inclined connecting sections of the two sliding sheets is gradually increased from bottom to top in the vertical direction;
the nozzle body is also provided with a connecting section which is communicated with the material gathering cavity and is used for injecting the molten consumable materials into the material gathering cavity, and the connecting section used for injecting the molten consumable materials into the material gathering cavity is connected with the discharge end of the melting mechanism; the connecting section and the nozzle body are coaxially arranged, a conical groove is arranged at the connecting position of the nozzle body and the discharge end of the connecting section, and the transverse intervals of the conical groove are gradually narrowed from bottom to top in the vertical direction;
two open grooves communicated with the material gathering cavity are respectively formed in two sides of the sprayer body, the two open grooves are symmetrically arranged about the center line of the sprayer body, sliding pieces respectively arranged on one side of the sprayer body are matched with the open grooves in a sliding mode, and the two sliding pieces can extend outwards relative to the center line of the sprayer body and narrow towards the center relative to the center line of the sprayer body in the sliding process of the open grooves;
when the two sliding sheets are in a contraction state, the vertical sections of the two sliding sheets are tightly attached to the side faces of the central line of the spray head body, so that the spray opening is in a closed state, and the material collecting cavity forms a closed space;
the poking mechanism comprises a poking sheet which is arranged on the supporting body and can rotate around the axis of the poking sheet, two ends of the poking sheet are respectively hinged with a poking rod, the other ends of the two poking rods are respectively hinged with one end of a guide sheet which is arranged on the supporting body and can rotate around the axis of the poking sheet, the guide sheet and the two poking rods form a four-bar mechanism, and the two poking rods are parallel to each other; the shifting piece is connected to a power output end of the power supply device, the guide piece is sleeved outside the spray head body, and power provided by the power supply device to the shifting piece is used for driving the shifting piece to deflect in the clockwise direction and the anticlockwise direction;
the end side of the slip sheet deviating from the central line of the spray head body is provided with a shifting column which is arranged in the vertical direction, the guide sheet is provided with a circular arc guide groove matched with the shifting column, and the matching of the guide groove and the shifting column can push the slip sheet to move towards the central line of the spray head body or the direction deviating from the central line of the spray head body along the guide direction of the open slot;
arc guide grooves matched with the shifting columns are respectively arranged on two sides of the guide sheet, and the pair of arc guide grooves can push the pair of sliding sheets to synchronously move towards the center line of the sprayer body or deviate from the center line of the sprayer body along the guide direction of the open slot;
the supporting body is provided with an annular groove a for mounting the shifting piece, the supporting body is also provided with an annular groove b for mounting the guide piece, the annular groove a is collinear with the rotation center of the shifting piece, the annular groove b is collinear with the rotation center of the guide piece, and the power output end of the power supply device is connected to the center of the shifting piece and is collinear with the rotation center of the shifting piece;
the support body is also provided with a groove which is communicated with the inner cavity of the annular groove a and the inner cavity of the annular groove b and is used for the deflector rod to pass through;
the center of the ring groove b is provided with a center hole which is used for the connecting section to penetrate and is matched with the outer wall of the sprayer body, the ring groove b is further provided with positioning notches which are respectively positioned at two sides of the center hole and are communicated with the center hole, the two positioning notches are distributed along the radial direction of the center hole, the connecting line of the center lines of the two positioning notches is vertical to the connecting line of the center of the ring groove a, the connecting line of the center of the ring groove b is vertical to the connecting line of the center line of the ring groove b, the ring groove b is further provided with guiding notches which are positioned at two sides of the center hole and are positioned outside the positioning notches, the guiding notches are communicated with the positioning notches, the center lines of the guiding notches and the center lines.
2. The caliber-adjustable 3D printer nozzle as claimed in claim 1, wherein a vertical guiding groove is formed on a side surface of the vertical section of the slip sheet facing the center line of the nozzle body.
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| CN201710528915.3A CN107127963B (en) | 2017-07-01 | 2017-07-01 | Bore-adjustable 3D printer nozzle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10751934B2 (en) * | 2018-02-01 | 2020-08-25 | Divergent Technologies, Inc. | Apparatus and methods for additive manufacturing with variable extruder profiles |
| CN108478861B (en) * | 2018-04-26 | 2021-03-30 | 华南理工大学 | Needle head used for 3D printing and method for 3D printing of cylindrical single fiber with petal-shaped groove |
| CN110978511B (en) * | 2019-12-23 | 2021-09-17 | 芜湖市爱三迪电子科技有限公司 | Line footpath controlling means of 3D printing consumables |
| CN110978520A (en) * | 2019-12-24 | 2020-04-10 | 芜湖市爱三迪电子科技有限公司 | Thickness adjusting device is used in processing of 3D printing consumables |
| CN111136856A (en) * | 2019-12-30 | 2020-05-12 | 西安交通大学 | Double-component mixed epoxy casting dielectric function gradient insulation manufacturing device and method |
| CN114633475B (en) * | 2022-05-20 | 2022-08-23 | 南昌大学 | Variable-caliber 3D printing extrusion head and application method thereof |
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| CN204354488U (en) * | 2014-11-12 | 2015-05-27 | 广东工业大学 | A kind of 3D printer head of controlled bore |
| CN106426908A (en) * | 2016-10-14 | 2017-02-22 | 山东大学 | Variable-caliber 3D printer extrusion head and printing method thereof |
| CN206106386U (en) * | 2016-10-20 | 2017-04-19 | 山东科技大学 | Variable bore extrusion nozzle of FDM type 3D printer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10150239B2 (en) * | 2015-12-29 | 2018-12-11 | Western Digital Technologies, Inc. | Extruder for three-dimensional additive printer |
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| CN204354488U (en) * | 2014-11-12 | 2015-05-27 | 广东工业大学 | A kind of 3D printer head of controlled bore |
| CN106426908A (en) * | 2016-10-14 | 2017-02-22 | 山东大学 | Variable-caliber 3D printer extrusion head and printing method thereof |
| CN206106386U (en) * | 2016-10-20 | 2017-04-19 | 山东科技大学 | Variable bore extrusion nozzle of FDM type 3D printer |
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Effective date of registration: 20191217 Address after: No. 67, houting second industrial zone, Zhongting East Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Jinshi Three Dimensional Printing Technology Co., Ltd. Address before: 210000 Nanjing Office of Yongzhen Craftsman Road, Nanjing International Trade Center, No. 18 Shandong Road, Qinhuai District, Nanjing City, Jiangsu Province Applicant before: Lu'an Yongzhen Jiang Dao Electromechanical Technology Co Ltd |
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