CN117681442A

CN117681442A - Printing head, three-dimensional forming equipment and printing control method

Info

Publication number: CN117681442A
Application number: CN202211078557.8A
Authority: CN
Inventors: 周承立; 王敬杰
Original assignee: Shenzhen Anycubic Technology Co Ltd
Current assignee: Shenzhen Anycubic Technology Co Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2024-03-12

Abstract

The invention discloses a printing head, three-dimensional forming equipment and a printing control method, which are mainly used for solving the problem that the three-dimensional forming equipment cannot be automatically leveled. The main technical scheme of the invention is that the printing head comprises: a support base; the detection device is connected with the supporting seat; the spray head assembly is movably connected to the supporting seat so as to move relative to the supporting seat; the spray head assembly comprises a first position and a second position relative to the supporting seat, wherein the second position is a position for triggering the detection device to generate a feedback signal; and the fastening component is connected with the supporting seat so as to respond to the feedback signal generated by the detection device to fix the spray head component. The stereolithography apparatus comprises the above-described print head. The leveling device is mainly used for leveling the three-dimensional forming equipment.

Description

Printing head, three-dimensional forming equipment and printing control method

Technical Field

The invention relates to the technical field of 3D printing, in particular to a printing head, a three-dimensional forming device and a printing control method.

Background

The stereolithography apparatus, also known as a three-dimensional printer (3 DP), is a cumulative manufacturing technique. The principle of the three-dimensional forming equipment is that data and raw materials are put into the three-dimensional forming equipment, and a guide device drives a printing head to spray layer by layer according to the outline of a model to realize three-dimensional printing. The first layer of the model is very important, and is the basis for ensuring the stability and accuracy of the model. The formation of the first layer requires that the nozzles remain the same distance from the upper surface of the printing platform at all times to ensure uniform adhesion of the first layer pattern on the printing platform. However, due to the installation errors of the nozzles or the printing platform or the long-term deformation, the height of the upper surface of the printing platform is changed, the distance between the nozzles and the printing platform is changed in the moving spraying process, the thickness of the first layer of the model is uneven, the bonding strength on the printing platform is uneven, and the stability of the product in the printing process is poor.

In the prior art, a probe different from a nozzle is generally adopted to detect the height of a printing platform, such as in the patent with publication number CN216127742U, an automatic leveling device is connected to a printing nozzle, the printing platform pushes the probe to rise, the upper end of the probe is contacted with a metal elastic sheet, the metal elastic sheet is contacted with a probe point on a circuit board to form a reflux circuit, and a signal is generated to obtain the height of the printing platform. However, since the height of the printing platform is obtained by the automatic leveling device, the actual position of the nozzle needs to be compensated according to the height difference between the probe and the nozzle, however, errors can be generated when the nozzle and the automatic leveling device are installed, so that the height difference between the probe and the nozzle cannot be accurately obtained, and the position of the nozzle needs to be manually compensated, so that the leveling scheme is complex, and automatic leveling cannot be realized.

Disclosure of Invention

In view of the above, the embodiment of the invention provides a print head, a three-dimensional forming device and a printing control method, which are mainly used for solving the problem that the three-dimensional forming device cannot automatically level, wherein a detection device is arranged on a spray head assembly, and the spray head assembly touches a printing platform to obtain the height of the printing platform, so that the automatic leveling is realized without manual operation.

In order to achieve the above purpose, the present invention mainly provides the following technical solutions:

in one aspect, the present invention provides a printhead for leveling a print platform of a stereoscopic shaping apparatus, the printhead comprising:

a support base;

the detection device is connected with the supporting seat;

the spray head assembly is movably connected to the supporting seat so as to move relative to the supporting seat, and comprises a first position and a second position relative to the supporting seat, wherein the second position is a position for triggering the detection device to generate a feedback signal;

and the fastening assembly is connected with the supporting seat so as to respond to the detection device to generate a feedback signal to fix the spray head assembly.

The detection device comprises a first detection terminal and a second detection terminal, wherein the first detection terminal is connected with the supporting seat, and the second detection terminal is connected with the spray head assembly; the spray head assembly drives the second detection terminal to move, so that a feedback signal is generated when the first detection terminal and the second detection terminal interact;

The first detection terminal is a baffle plate, and the second detection terminal is a trigger switch;

or the first detection terminal is a trigger switch, and the second detection terminal is a baffle;

the trigger switch is used for generating a feedback signal under the action of the baffle plate.

The fastening assembly comprises a fastening head assembly and a driving assembly, the driving assembly is in driving connection with the fastening head assembly, and the driving assembly is used for driving the fastening head assembly to fix the spray head assembly when the detection device generates a feedback signal.

The fastening head assembly comprises a first claw and a second claw, the first claw and the second claw are respectively and movably connected with the supporting seat, the spray head assembly is at least partially positioned between the first claw and the second claw, the driving assembly is connected with the supporting seat, and the first claw and/or the second claw are/is connected with the driving assembly;

the driving assembly is used for driving the first clamping jaw and/or the second clamping jaw to move so as to clamp or unclamp the spray head assembly.

The first clamping jaw and the second clamping jaw are arranged in a crossing manner and are rotationally connected, the first clamping jaw and the second clamping jaw are enclosed to form a first clamping space and a second clamping space which are positioned at two sides of the crossing point, and the spray head assembly is at least partially positioned in the first clamping space;

the driving assembly changes the size of the first clamping space by changing the size of the second clamping space so that the spray head assembly is clamped or unclamped.

The first clamping jaw is provided with a first opening, the second clamping jaw is provided with a second opening, and the first clamping jaw and the second clamping jaw are arranged in a crossing manner through the first opening and the second opening, so that the first clamping jaw and the second clamping jaw correspond to the same height of the spray head assembly;

and/or the nozzle component is provided with a non-slip protrusion, and the first claw and the second claw are opposite to the non-slip protrusion.

The driving assembly comprises a power piece and an adjusting head, the power piece is connected with the supporting seat, the adjusting head is connected with the power piece, the adjusting head is positioned in the second clamping space, and the power piece is used for driving the adjusting head to move;

the adjusting head is of a cylindrical structure and is used for rotating along an axis under the driving of the power piece, the outer walls of the two radial sides of the adjusting head are respectively abutted against the first clamping jaw and the second clamping jaw, and the width of the adjusting head in the first radial direction is larger than that of the adjusting head in the second radial direction;

or, the adjusting head comprises a first bulge and a second bulge, the power piece is used for driving the adjusting head to rotate, the first bulge is used for abutting against or separating from the first claw, and the second bulge is used for abutting against or separating from the second claw.

The fastening assembly further comprises a cushion block, the cushion block comprises a first expansion head, a second expansion head and a base plate, the base plate is connected with the supporting seat, the first expansion head and the second expansion head are elastically connected with the base plate, the first expansion head is located between the first clamping jaw and the spray head assembly, and the second expansion head is located between the second clamping jaw and the spray head assembly;

The first expanding head and the second expanding head are used for providing elastic force for the first claw and the second claw to move oppositely;

the cushion block is made of rubber.

Wherein, the shower nozzle assembly includes nozzle assembly, slide bar and elastic component;

the sliding rod is movably connected with the supporting seat, the nozzle assembly is connected with the sliding rod, and the elastic piece is arranged between the nozzle assembly and the supporting seat;

the elastic piece is used for applying elastic force for the nozzle assembly to move away from the supporting seat;

two ends of the sliding rod are respectively positioned at two sides of the supporting seat;

the support seat is provided with a cross-connection hole, the sliding rod is movably cross-connected to the cross-connection hole, two ends of the sliding rod are respectively positioned at two sides of the support seat, the sliding rod is provided with a first guide piece, the cross-connection hole is provided with a second guide piece, and the first guide piece and the second guide piece interact to limit the sliding rod in the circumferential direction;

the print head further includes a heat dissipating housing assembly and a mount assembly;

the heat dissipation shell assembly comprises a shell and a fan assembly; the mounting seat assembly comprises a mounting plate and a sliding piece;

the shell is connected with the mounting plate and surrounds the mounting plate to form an accommodating space, the printing head is positioned in the accommodating space, the supporting seat is connected with the mounting plate, and the nozzle of the nozzle assembly is positioned outside the accommodating space;

The fan assembly is located between the printing head and the shell and used for radiating heat of a radiating block or a model of the spray head assembly, the sliding piece is connected with one side of the mounting plate, which is opposite to the printing head, and the sliding piece is also used for connecting a guide frame assembly of the three-dimensional forming equipment.

On the other hand, the invention provides a stereoscopic forming device, which comprises any printing head, a base, a guide driving assembly and a printing platform, wherein the guide driving assembly is connected with the base, the sliding piece and the printing platform are respectively connected with the guide driving assembly, the guide driving assembly is used for driving the printing head to move relative to the printing platform, and the nozzle assembly can move towards a second position when touching the printing platform;

the spray head assembly is also used to spray printing consumables.

In still another aspect, the present invention also provides a print control method, including:

driving the spray head assembly to move to a target coordinate, wherein at least 2 leveling coordinates are set, and the leveling coordinates to which the spray head assembly is required to move are target coordinates;

driving the spray head assembly to touch the printing platform, and driving the spray head assembly to continuously move towards the printing platform so as to trigger the detection device to output a feedback signal;

acquiring feedback coordinates corresponding to the feedback signals, and taking the next leveling coordinate of the target coordinates according to a set sequence as a target coordinate;

Repeatedly executing the driving nozzle assembly to move to a target coordinate; driving the spray head assembly to touch the printing platform, and driving the spray head assembly to continuously move towards the printing platform so as to trigger the detection device to output a feedback signal; a step of acquiring feedback coordinates corresponding to the feedback signals, and taking the next leveling coordinate of the target coordinates according to a set sequence as a target coordinate until all printing platform positions corresponding to the leveling coordinates are touched by the spray head assembly;

fixing the relative position of the spray head assembly and the detection device in response to the last feedback signal;

and driving the spray head assembly to print a model on the printing platform according to the feedback coordinates.

driving the spray head assembly to move towards the printing platform at a first coordinate so as to touch the printing platform;

the spray head assembly is driven to continuously move towards the printing platform so as to trigger the detection device to output a first feedback signal and acquire feedback coordinates corresponding to the first feedback signal;

driving the spray head assembly to move towards the printing platform at a second coordinate so as to touch the printing platform;

The spray head assembly is driven to continuously move towards the printing platform so as to trigger the detection device to output a second feedback signal and obtain feedback coordinates corresponding to the second feedback signal;

fixing the relative position of the spray head assembly and the detection device in response to the second feedback signal;

The technical scheme provided by the embodiment of the invention is mainly used for solving the problem that the three-dimensional forming equipment cannot be automatically leveled, the detection device is arranged on the spray head assembly, the spray head assembly is contacted with the printing platform, and the spray head assembly can move from the first position to the second position so as to acquire the height of the printing platform when a feedback signal is generated at the second position, so that manual operation is not needed, and the automatic leveling is realized. In the prior art, a probe different from a nozzle is generally adopted to detect the height of a printing platform, and because the height of the printing platform is obtained by the probe, the actual position of the nozzle is compensated according to the height difference between the probe and the nozzle, however, the height difference between the nozzle and the probe cannot be accurately obtained, and the position of the nozzle needs to be manually compensated, so that the leveling scheme is complex, and automatic leveling cannot be realized. Compared with the prior art, in this application file, the shower nozzle subassembly receives print platform's thrust effect, relative supporting seat removes to the second position for detection device produces feedback signal, thereby acquire print platform's height, when touching last check point and producing feedback signal, fixed shower nozzle subassembly, make the shower nozzle subassembly keep spraying in the second position, realize that the leveling testing result of shower nozzle subassembly can be directly used for printing, the uncertain difference in height that produces when avoiding using the probe to detect, need not the manual work and compensate the position of shower nozzle subassembly, full-automatic leveling has been realized, the complexity of leveling has been reduced.

Drawings

Fig. 1 is a schematic perspective view of a printhead according to an embodiment of the present invention at a first view angle;

FIG. 2 is a schematic exploded view of a printhead according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a printhead according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a printhead according to an embodiment of the present invention at a second view angle;

FIG. 5 is a schematic diagram of a printhead according to an embodiment of the present invention at a third view;

FIG. 6 is a schematic view of a fastening assembly clamping a nozzle assembly in a printhead according to an embodiment of the present invention;

FIG. 7 is a schematic view of a printhead fastening assembly in a loose-head assembly configuration according to an embodiment of the present invention;

FIG. 8 is a schematic view of a fastening assembly according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an adjusting head at a first view angle according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an adjusting head at a second view angle according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of an adjusting head according to an embodiment of the present invention at a third view angle;

fig. 12 is a schematic perspective view of a cushion block according to an embodiment of the present invention;

Fig. 13 is a schematic perspective view of a sliding rod according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a support base according to an embodiment of the present invention;

FIG. 15 is a schematic exploded view of a printhead assembly according to an embodiment of the present invention;

FIG. 16 is a schematic perspective view of a printhead assembly according to an embodiment of the present invention;

fig. 17 is a schematic perspective view of a stereoscopic forming apparatus according to an embodiment of the present invention;

FIG. 18 is a flowchart of a print control method according to an embodiment of the present invention;

fig. 19 is a flowchart of another printing control method according to an embodiment of the invention.

Detailed Description

In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description will refer to the specific implementation, structure, characteristics and effects of the printing head according to the invention with reference to the attached drawings and the preferred embodiment. For convenience of description, the following light projection stereoscopic molding apparatus is illustrated as an example.

In one aspect, as shown in FIGS. 1-5, embodiments of the present invention provide a printhead for leveling a print platform 40 of a stereoscopic molding apparatus, the printhead comprising:

A support base 100;

the detection device 300 is connected with the supporting seat 100;

the spray head assembly 200, the spray head assembly 200 is movably connected to the supporting seat 100 to move relative to the supporting seat 100, the spray head assembly 200 comprises a first position and a second position relative to the supporting seat 100, and the second position is a position where the detection device 300 generates a feedback signal;

and a fastening assembly 400, the fastening assembly 400 being coupled to the support base 100 to fix the showerhead assembly 200 in response to the sensing device 300 generating a feedback signal.

The stereolithography apparatus mainly includes a base 20 and a guide driving assembly 30, the guide driving assembly 30 is connected to the base 20, the support 100 is directly or indirectly connected to the guide driving assembly 30, and the guide driving assembly 30 is used for driving the print head to move relative to the printing platform 40. Wherein the showerhead assembly 200 may be closer to the print platform 40 in the first position than in the second position. When the showerhead assembly 200 is not in contact with the print platform 40, the showerhead assembly is in the first position; when the head assembly 200 is in contact with the printing platform 40, if the head assembly 200 continues to move toward the printing platform 40, the head assembly 200 moves from the first position to the second position under the reaction force of the printing platform 40.

In one embodiment, the guide driving assembly 30 includes an X-axis guide mechanism, a Y-axis guide mechanism, and a Z-axis guide mechanism, the spray head assembly 200 is connected to the X-axis guide mechanism, the X-axis guide mechanism is movable in a vertical direction with respect to the Z-axis guide mechanism, such that the spray head assembly 200 can be moved closer to or farther from the printing platform 40, the Y-axis guide mechanism is connected to the base 20, the printing platform 40 is connected to the Y-axis guide mechanism, and is movable in a Y-axis direction, and the spray head assembly 200 can be moved in the X-axis direction along the X-axis guide mechanism, such that the spray head assembly 200 can correspond to any position on the printing platform 40. In the detection process, a plurality of detection points uniformly distributed on the printing platform 40 are selected, for example, 16 detection points are selected on the printing platform 40, and the 16 detection points are uniformly distributed and cover the upper surface of the printing platform 40. In the detection process, the showerhead assembly 200 sequentially corresponds to each detection point, and the detection of the heights of each detection point is performed one by one, so as to obtain the actual profile information of the upper surface of the printing platform 40. For any detection point, the spray head assembly 200 is moved to the position above the detection point, when the X-axis guide mechanism drives the spray head assembly 200 to descend to contact the printing platform 40, the spray head assembly 200 stops moving under the action of the printing platform 40, and the X-axis guide mechanism continues to drive the supporting seat 100 to move downwards, so that the spray head assembly 200 moves relative to the supporting seat 100, when the spray head assembly 200 moves to the second position, the detection device 300 generates a feedback signal, the X-axis guide mechanism stops moving, and the position coordinates of the X-axis guide mechanism at the moment are recorded, so that the position information of the spray head assembly 200 relative to the printing platform 40 can be obtained. The position information includes coordinates of x direction, y direction and z direction, and the z direction may be height coordinates. Then, in the printing process, the height of the nozzle assembly 200 can be adjusted at a corresponding position according to the position information of the printing platform 40, so that the nozzle 211 in the nozzle assembly 200 always keeps a proper and fixed distance from the upper surface of the printing platform 40, and uniform adhesion of each layer of the model is ensured.

The spray head assembly 200 is used for touching the printing platform during leveling detection to acquire the height information of the spray head assembly 200 relative to the printing platform 40 and spraying consumable materials during printing. In the leveling test, there is a first initial position between the showerhead assembly 200 and the support base 100, i.e. the position between the showerhead assembly 200 and the support base 100 when the showerhead assembly 200 does not contact the printing platform 40, and there is a second position between the showerhead assembly 200 and the support base 100 when the feedback signal is generated, and after the showerhead assembly 200 completes the test on each test point, the showerhead assembly 200 returns to the first initial position, so that the first test terminal 310 and the second test terminal 320 stop interacting, and the leveling test on the next test point is performed. The height information of the print platform is obtained when the showerhead assembly 200 is in the second position. When the spray head assembly 200 prints, the relative position of the spray head assembly 200 and the supporting seat 100 is the second position, after the leveling detection of all detection points is completed, the spray head assembly 200 is fixed at the second position, namely when the detection device 300 sends a feedback signal for the last detection point detection, the relative position of the spray head assembly 200 and the supporting seat 100 is fixed, and in the subsequent printing process, the spray head assembly 200 is always kept at the second position for printing, so that the height information of the printing platform acquired in the leveling detection process can be directly used in the printing process without compensating the height of the spray head assembly 200, the full automation of the leveling process is realized, manual intervention is not needed, and errors caused by the compensation process are avoided.

The manner of fixing the head assembly 200 in the second position may be various, and it is intended to fix the head assembly 200 during printing, and to release the head assembly 200 at the time of leveling detection so that the head assembly 200 can move relative to the support base 100. When leveling is detected, the fastening component 400 loosens the spray head component 200, so that the spray head component 200 can move relative to the supporting seat 100, the height of a detection point is obtained, when the last detection point is detected, and the detection device 300 sends a feedback signal, the spray head component 200 is fixed by the fastening component 400, on one hand, the spray head component 200 is fixed at a second position, the height information of a printing platform obtained in the leveling detection process can be directly used in the printing process, the compensation of the height of the spray head component 200 is not needed, on the other hand, the stability of the relative positions of the spray head component 200 and the supporting seat 100 is ensured, the spray head component 200 cannot vibrate and move relative to the supporting seat 100 in the printing process, and the printing accuracy is ensured.

The printing head, the three-dimensional forming equipment and the printing control method provided by the embodiment of the invention are mainly used for solving the problem that the three-dimensional forming equipment cannot be automatically leveled, the detection device is arranged on the spray head assembly, the spray head assembly is contacted with the printing platform to obtain the height of the printing platform, and the automatic leveling is realized without manual operation. In the prior art, a probe different from a nozzle is generally adopted to detect the height of a printing platform, and because the height of the printing platform is obtained by the probe, the actual position of the nozzle is compensated according to the height difference between the probe and the nozzle, however, the height difference between the nozzle and the probe cannot be accurately obtained, and the position of the nozzle needs to be manually compensated, so that the leveling scheme is complex, and automatic leveling cannot be realized. Compared with the prior art, in this application file, the shower nozzle subassembly receives the thrust effect when contacting with print platform, relative supporting seat removes for detection device produces feedback signal, thereby acquire print platform's height, when touching last check point and producing feedback signal, fixed shower nozzle subassembly, make the shower nozzle subassembly keep spraying in the second position, realize that the leveling testing result of shower nozzle subassembly can be directly used for printing, the uncertain difference in height that produces when avoiding using the probe to detect, need not the manual work and compensate the position of shower nozzle subassembly, full-automatic leveling has been realized, the complexity of leveling has been reduced.

The detecting device 300 includes a first detecting terminal 310 and a second detecting terminal 320, the first detecting terminal 310 is connected with the supporting base 100, and the second detecting terminal 320 is connected with the showerhead assembly 200; the showerhead assembly 200 moves the second sensing terminal 320 such that a feedback signal is generated when the first sensing terminal 310 interacts with the second sensing terminal 320.

The first detection terminal 310 and the second detection terminal 320 may be in various forms, for example, the first detection terminal 310 is a shutter, and the second detection terminal 320 is a trigger switch. Specifically, the trigger switch may be a groove-shaped photoelectric switch with a groove-shaped structure, the processor of the three-dimensional forming device is connected with the trigger switch, the trigger switch moves along with the spray head assembly 200, the baffle is motionless, and when the baffle enters the groove-shaped structure, an optical signal of the groove-shaped photoelectric switch is shielded, so that the groove-shaped photoelectric switch is triggered to send a feedback signal. Alternatively, the first detection terminal 310 is a trigger switch, and the second detection terminal 320 is a shutter. The baffle moves along with the spray head assembly 200, the trigger switch is not moved, and when the baffle enters the groove-shaped structure, the optical signal of the groove-shaped photoelectric switch is shielded, and then the groove-shaped photoelectric switch is triggered to send a feedback signal. It can be understood that the baffle is the baffle that has certain height, when the top border of baffle gets into the cell type structure, will produce feedback signal, and the master controller of three-dimensional former stops the removal of printing head, records the position of printing head at this moment, acquires print platform's actual height. The second position is a relative position of the showerhead assembly 200 and the support pedestal 100 when the first detecting terminal 310 and the second detecting terminal 320 interact to generate a feedback signal.

In one embodiment, as shown in fig. 6-8, the fastening assembly 400 includes a fastening head assembly 410 and a driving assembly 420, the driving assembly 420 is in driving connection with the fastening head assembly 410, and the driving assembly 420 is used for driving the fastening head assembly 410 to fix the spray head assembly 200 when the detection device 300 generates a feedback signal.

The driving component 420 and the detecting device 300 are both connected with a main controller of the three-dimensional forming device, and when the main controller receives the feedback signal, the driving component 420 is controlled to drive the fastening head component 410 to act. The fastening head assembly 410 may take a variety of forms, and is intended to secure the spray head assembly 200 under the driving of the driving assembly 420.

In one embodiment, the fastening head assembly 410 is a fixing pin, the nozzle assembly 200 is provided with a pin hole, when the main controller receives the feedback signal, the driving assembly 420 is controlled to drive the fixing pin to move, so that the fixing pin is inserted into the pin hole, the nozzle assembly 200 is fixed at the second position, and when leveling detection is performed, the driving assembly 420 drives the fixing pin to move, and the fixing pin is moved out of the pin hole, so that the nozzle assembly 200 can move relative to the supporting seat 100.

In another embodiment, the fastening head assembly 410 includes a first jaw 411 and a second jaw 412, the first jaw 411 and the second jaw 412 are movably connected to the support base 100, the spray head assembly 200 is at least partially located between the first jaw 411 and the second jaw 412, the driving assembly 420 is connected to the support base 100, and the first jaw 411 and/or the second jaw 412 are connected to the driving assembly 420. The driving assembly 420 is used to drive the first and second jaws 411 and 412 to move to clamp or unclamp the showerhead assembly 200.

The first claw 411 and the second claw 412 are specifically rotatably connected to the supporting seat 100, and the driving assembly 420 drives the first claw 411 and the second claw 412 to rotate so as to clamp the spray head assembly 200, thereby realizing the fixation of the spray nozzle. The first and second jaws 411 and 412 may be disposed at a plurality of positions of the support base 100, such as the support base 100 is in an approximately plate-shaped structure, the first and second jaws 411 and 412 may be disposed at an upper surface of the support base 100 to clamp the showerhead assembly 200 by a portion of the showerhead assembly 200 above the support base 100, such as the sliding bar 220 described below, or the first and second jaws 411 and 412 may be disposed at a lower surface of the support base 100 to clamp the showerhead assembly 200 by a portion of the showerhead assembly 200 below the support base 100. The spray head assembly 200 is fixed by adopting the clamping mode of the first clamping jaw 411 and the second clamping jaw 412, structures such as holes or grooves are not required to be formed in the spray head assembly 200, the mechanical strength of the spray head assembly 200 is ensured, clamping can be performed at any position of the spray head assembly 200, the flexibility of the position of the spray head assembly 200 is improved, and if the setting positions of the first detection terminal 310 and the second detection terminal 320 are adjusted, the fixed height of the spray head assembly 200 is changed, the positions of the first clamping jaw 411 and the second clamping jaw 412 are not required to be adjusted, and the spray head assembly 200 can still be clamped.

In one embodiment, as shown in fig. 8, the first claw 411 and the second claw 412 are disposed in a crossing manner and are rotatably connected, and the first claw 411 and the second claw 412 enclose a first clamping space 413 and a second clamping space 414 located at two sides of the crossing point, and at least a part of the spray head assembly 200 is located in the first clamping space 413. The driving assembly 420 changes the size of the first clamping space 413 by changing the size of the second clamping space 414 so that the showerhead assembly 200 is clamped or unclamped.

The first jaw 411 and the second jaw 412 are both clamping plates having an approximately S-shape, the first jaw 411 and the second jaw 412 are crossed by the middle area to form an approximately numeral "8" structure, the first jaw 411 and the second jaw 412 are rotatable, so that the first clamping space 413 and the second clamping space 414 are adjustable in size, and the first clamping space 413 and the second clamping space 414 are located at two sides of the crossing point a, so that the first clamping space 413 and the second clamping space 414 are in an equal size relationship, and when the second clamping space 414 is enlarged, the first clamping space 413 is reduced, and then the spray head assembly 200 is clamped. The first jaw 411 and the second jaw 412 may be rotatably coupled to the support base 100 by the crossing point a, or, as shown in fig. 6 to 8, one end of the first jaw 411 and one end of the second jaw 412 are rotatably coupled to the support base 100 by a rotation bolt 415, and the rotation bolt 415 and the crossing point a are located at both sides of the spray head assembly 200 in the radial direction.

In one embodiment, as shown in fig. 2 and 8, a first opening 4111 is formed in the first jaw 411, a second opening 4121 is formed in the second jaw 412, and the first jaw 411 and the second jaw 412 are disposed across from each other through the first opening 4111 and the second opening 4121, so that the first jaw 411 and the second jaw 412 correspond to the same height of the spray head assembly 200.

The first opening 4111 and the second opening 4121 enable the first claw 411 and the second claw 412 which are arranged in a crossing manner to be located at the same height, and the spray head assembly 200 is clamped by the same height of the spray head assembly 200, so that the position of the spray head assembly 200 is more stable, and the problem that stress points on two sides of the spray head assembly 200 are not in the same horizontal plane due to the fact that the heights of the first claw 411 and the second claw 412 are inconsistent is avoided, and the spray head assembly 200 is inclined is solved.

In one embodiment, as shown in fig. 2, the driving assembly 420 includes a power member 421 and an adjusting head 422, the power member 421 is connected to the support base 100, the adjusting head 422 is connected to the power member 421, the adjusting head 422 is located in the second clamping space 414, the power member 421 is used for driving the adjusting head 422 to move, and the adjusting head 422 acts on the first jaw 411 and the second jaw 412 to enable the first jaw 411 and the second jaw 412 to rotate, so as to change the size of the second clamping space 414. The structure of the adjustment head 422 can be various, and the following two specific structures are taken as examples:

In one embodiment, the adjusting head 422 has a cylindrical structure, the adjusting head 422 is used for being driven by the power piece 421 to rotate along the axis, the outer walls of two radial sides of the adjusting head 422 are respectively abutted against the first claw 411 and the second claw 412, and the width of the adjusting head 422 in the first radial direction is larger than the width of the adjusting head 422 in the second radial direction.

The adjustment head 422 may be symmetrical about an axis such that the first and second jaws 411, 412 may move in unison to avoid tilting the showerhead assembly 200 due to unbalanced forces when clamping the showerhead assembly 200. The adjusting head 422 may be of a cam structure, or, as shown in fig. 9-11, the adjusting head 422 includes a connecting portion 423 and an adjusting portion 424, the connecting portion 423 is connected with a rotating shaft of the steering engine, the adjusting portion 424 is connected with the connecting portion 423, the connecting portion 423 and the adjusting portion 424 are of cylindrical structures, and the connecting portion 423, the adjusting portion 424 and the rotating shaft of the steering engine are coaxial. The outer walls of the two radial sides of the adjusting portion 424 are used for abutting the first clamping jaw 411 and the second clamping jaw 412, the inner wall of the adjusting portion 424 is cylindrical, the thickness of the side wall of the adjusting portion 424 in the first radial direction is larger than the thickness of the side wall of the adjusting portion 424 in the second radial direction, and the first radial direction and the second radial direction can be perpendicular directions. As shown in fig. 9, the first radial direction is u-direction, the second radial direction is v-direction, and the first radial direction u may be the same as or different from the x-direction or the y-direction, and the second radial direction v may be perpendicular to the first radial direction u. The inner diameter of the adjusting portion 424 is r, the thickness b of the sidewall of the adjusting portion 424 in the first radial direction is greater than the thickness c of the sidewall of the adjusting portion 424 in the second radial direction, i.e., the width r+2b of the adjusting portion 424 in the first radial direction u is greater than the width r+2c of the adjusting portion 424 in the second radial direction v. Taking the power piece 421 as a steering engine, the first end of the first claw 411 and the first end of the second claw 412 are rotationally connected with the supporting seat 100, in the process of clamping the spray head assembly 200, as shown in fig. 6, the steering engine drives the adjusting head 422 to rotate along the first direction, so that the outer walls of two sides in the first radial direction u are abutted against the first claw 411 and the second claw 412, and the adjusting head 422 has a larger width in the first radial direction u, so that the first claw 411 and the second claw 412 are pushed to rotate, and the second clamping space 414 is enlarged, so that the first clamping space 413 is smaller, and the spray head assembly 200 is clamped. In the process of loosening the spray head assembly 200, as shown in fig. 7, the steering engine drives the adjustment head 422 to rotate in the opposite direction of the first direction, so that the outer walls of the two sides in the second radial direction v are opposite to the first jaw 411 and the second jaw 412, and the first jaw 411 and the second jaw 412 can approach each other due to the smaller width of the adjustment head 422 in the second radial direction v, so that the second clamping space 414 is reduced, the first clamping space 413 is enlarged, and the spray head assembly 200 is loosened.

In another embodiment, the adjusting head 422 includes a first protrusion and a second protrusion, the power member 421 is used to drive the adjusting head 422 to rotate, the first protrusion is used to abut against or separate from the first claw 411, and the second protrusion is used to abut against or separate from the second claw 412.

The adjustment head 422 may have a cylindrical structure or a cylindrical structure, and the weight of the adjustment head 422 is reduced. The first protrusion and the second protrusion are disposed on two radial sides of the adjusting head 422, when the first protrusion and the second protrusion are respectively abutted against the first jaw 411 and the second jaw 412, the distance between the first jaw 411 and the second jaw 412 is increased, so that the second clamping space 414 is enlarged, the first clamping space 413 is reduced, the clamping of the spray head assembly 200 is achieved, and when the first protrusion and the second protrusion are separated from the first jaw 411 and the second jaw 412, the distance between the first jaw 411 and the second jaw 412 can be reduced, the second clamping space 414 is reduced, the first clamping space 413 is enlarged, and the loosening of the spray head assembly 200 is achieved.

In one embodiment, as shown in fig. 12, the fastening assembly 400 further includes a spacer 430, the spacer 430 includes a first expansion head 431, a second expansion head 432, and a base 433, the base 433 is connected to the support 100, the first expansion head 431 and the second expansion head 432 are elastically connected to the base 433, the first expansion head 431 is located between the first jaw 411 and the spray head assembly 200, and the second expansion head 432 is located between the second jaw 412 and the spray head assembly 200. The first expansion head 431 and the second expansion head 432 serve to provide elastic force for the first jaw 411 and the second jaw 412 to move opposite to each other.

During the rotation of the adjustment head 422 to release the showerhead assembly 200, the sidewall of the adjustment head 422 will gradually lose the pressing action against the first and second jaws 411 and 412, and the sidewall of the adjustment head 422 will gradually disengage from the first and second jaws 411 and 412, so that the second clamping space 414 is reduced, an external force for reducing the second clamping space 414 and enlarging the first clamping space 413 needs to be applied to the first and second jaws 411 and 412. In one embodiment, expanding the first clamping space 413 is accomplished by the spacer blocks 430. The base plate 433 is provided with two connection holes 434, as shown in fig. 2, 5 and 14, the base plate 433 is connected to the mounting groove 120 of the upper surface of the support base 100 through the connection holes 434 by connection bolts 435, the first and second expansion heads 431 and 432 are vertically extended upward, the first and second expansion heads 431 and 432 are elastically movable with respect to the base plate 433 such that the first and second expansion heads 431 and 432 are deformed and approach each other when being pressed, such as in the process of clamping the spray head assembly 200, the side wall of the adjustment head 422 acts on the first and second jaws 411 and 412, the second clamping space 414 is enlarged, the first clamping space 413 is reduced, the first and second expansion heads 431 and 432 are elastically deformed and approach each other by the pressing of the first and second jaws 411 and 412, respectively, until abutting against the spray head assembly 200, and the first and second jaws 411 and 412 clamp the spray head assembly 200 by the first and second expansion heads 431 and 432. When the head assembly 200 is released, the side walls of the adjustment head 422 are separated from the first jaw 411 and the second jaw 412, the elastic force of the first expansion head 431 and the second expansion head 432 acts on the first jaw 411 and the second jaw 412, so that the first clamping space 413 is enlarged, the second clamping space 414 is reduced, and the first expansion head 431 and the second expansion head 432 are gradually restored to deform and are separated from the head assembly 200, so that the head assembly 200 can move relative to the support 100. The spacer block 430 enables the first clamping space 413 to be expanded to the greatest extent, so that the spray head assembly 200 can move smoothly, and the first expansion head 431 and the second expansion head 432 avoid slipping between the spray head assembly 200 and the first claw 411 and the second claw 412, so as to ensure the stability of fixation. In one embodiment, the first expansion head 431 and the second expansion head 432 are in arc-shaped plate mounting structures, the shapes of the first expansion head 431 and the second expansion head 432 are matched with the shapes of the sliding rod 220 of the spray head assembly 200, so that the first expansion head 431 and the second expansion head 432 can be better attached to the sliding rod 220, and gaps are formed between two opposite side edges of the first expansion head 431 and the second expansion head 432, so that the first expansion head 431 and the second expansion head 432 can move and approach each other. The spacer 430 may be made of a rubber material, or the spacer 430 may be made of a rubber material to increase the force for securing the showerhead assembly 200.

In an embodiment, as shown in fig. 14, the supporting seat 100 further includes two connection claws 130, the power part 421 is a steering engine, two sides of a housing of the steering engine are provided with connection lugs, and the connection lugs are connected with the connection claws 130 through bolts, so that stability of the steering engine is guaranteed. The rotating shaft of the steering engine passes through the two connecting claws 130 and then is connected with the adjusting head 422, so that the adjusting head 422 is positioned in the second clamping space 414 above the area between the two connecting claws 130.

In one embodiment, as shown in FIGS. 2-3, a spray head assembly 200 includes a nozzle assembly 210, a slide bar 220, and a resilient member 230. The sliding rod 220 is movably connected to the supporting seat 100, the nozzle assembly 210 is connected to the sliding rod 220, and the elastic member 230 is disposed between the nozzle assembly 210 and the supporting seat 100. The elastic member 230 serves to apply an elastic force to the nozzle assembly 210 to move away from the support base 100.

One embodiment of the sliding rod 220 is shown in fig. 13, and includes a limit cap 224 located at the top end and a connecting rod 225 connected to the limit cap 224, where the limit cap 224 is located above the first jaw 411 and the second jaw 412, and the elastic member 230 is disposed between the nozzle assembly 210 and the supporting seat 100, and the elastic member 230 may be a spring, which is sleeved outside the sliding rod 220 and abuts against the top surface of the heat dissipating block of the nozzle assembly 210 and the bottom surface of the supporting seat 100, and the spring is in a compressed state, so as to apply an elastic force to move toward the printing platform 40 to the nozzle assembly 210. In the leveling detection process, when the nozzle assembly 210 contacts the printing platform 40, the nozzle assembly 210 and the sliding rod 220 are simultaneously moved upwards to push the elastic member 230 to compress, after one detection point is detected, the nozzle assembly 210 is separated from the printing platform 40, the elastic member 230 applies downward elastic force to the nozzle assembly 210, and the limiting cap 224 abuts against the top ends of the first claw 411 and the second claw 412 to limit the nozzle assembly 210. The second detection terminal 320 may be disposed on a fan heat block of the nozzle assembly 210.

In some other embodiments, the spray head assembly 200 further includes a pipe 240 and a quick connector 250, the sliding rod 220 has a cylindrical structure with a central through hole, the bottom end of the sliding rod 220 is provided with external threads, the top end of the nozzle assembly 210 is provided with internal threads, and the sliding rod 220 is in threaded connection with the nozzle assembly 210. The material pipe 240 may be a teflon pipe, and the material pipe 240 passes through a central through hole of the sliding rod 220 and is connected to the nozzle assembly 210 in a penetrating manner, and is opposite to the nozzle 211 at the bottom end of the nozzle assembly 210. The top of the sliding rod 220 is provided with a counter bore, the inner wall of the counter bore is provided with internal threads, and after the quick connector 250 is sleeved with the material pipe 240, the quick connector is connected in the counter bore in a threaded manner, so that the material pipe 240 and the sliding rod 220 are fixed. The tube 240 is used to guide the consumable.

In one embodiment, the sliding rod 220 is provided with a protrusion 222, the first claw 411 and the second claw 412 are opposite to the protrusion 222, the first claw 411 abuts against the protrusion 222 through the first expansion head 431, the second claw 412 abuts against the protrusion 222 through the second expansion head 432, and the protrusion 222 interacts with the first expansion head 431 and the second expansion head 432, so that the stability of clamping is improved, and slipping is avoided.

In one embodiment, as shown in fig. 13-14, a through hole 110 is provided on the supporting seat 100, the sliding rod 220 movably passes through the through hole 110, two ends of the sliding rod 220 are respectively located at two sides of the supporting seat 100, a first guiding piece 221 is provided on the sliding rod 220, a second guiding piece 111 is provided on the through hole 110, and the first guiding piece 221 interacts with the second guiding piece 110 to perform circumferential limiting on the sliding rod 220.

The first guide piece 221 is a sliding groove axially extending on the side wall of the sliding rod 220, the second guide piece 111 is a sliding head arranged on the inner wall of the through hole 110, and the sliding head is slidably embedded into the sliding groove, so that the sliding rod 220 can only move in the vertical direction and cannot circumferentially rotate, the sliding groove and the sliding head are in clearance fit, and a clearance between the sliding groove and the sliding head is greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

In one embodiment, as shown in fig. 15-16, the printhead further includes a heat dissipating housing assembly 500 and a mount assembly 600. The heat dissipating housing assembly 500 includes a housing 510 and a fan assembly 520. The mount assembly 600 includes a mounting plate 610 and a slider 620. The housing 510 is connected to the mounting plate 610 and encloses an accommodating space in which the print head is located, the support base 100 is connected to the mounting plate 610, and the nozzle 211 of the head assembly 200 is located outside the accommodating space. The fan assembly 520 is located between the printhead and the housing 510 for dissipating heat from a heat sink or mold of the spray head assembly 200, and the slider 620 is connected to a side of the mounting plate 610 opposite the printhead, and the slider 620 is also used to connect to a guide frame assembly of the stereolithography apparatus.

The two fans of fan assembly 520 respectively dissipate heat from the heat sink of nozzle assembly 210 and cool the extruded consumable. The supporting seat 100 is fixed on the mounting plate 610 through the bolt, and the casing 510 is connected with the mounting plate 610 through the bolt, and the casing 510 top has feed opening 511, and quick connector 250 is worn out by feed opening 511, is located the casing 510 outside, makes things convenient for the penetration of consumptive material.

On the other hand, as shown in fig. 17, the present invention provides a stereolithography apparatus, which includes the print head 10 of any one of the foregoing embodiments, and the base 20, the guide driving assembly 30, and the print platform 40, wherein the guide driving assembly 30 is connected to the base 20, the sliding member 620 and the print platform 40 are respectively connected to the guide driving assembly 30, the guide driving assembly 30 is used for driving the print head 10 to move relative to the print platform 40, and the nozzle assembly 200 touches the print platform 40 to move to the second position. The showerhead assembly 200 is also used to spray printing consumables.

The stereolithography apparatus includes any of the above-described printheads, including any of the above-described printheads, having advantages that are not described in detail herein.

In still another aspect, as shown in fig. 18, the present invention further provides a print control method, which may be applied to the aforementioned stereoscopic molding apparatus, the print control method including:

s11: and driving the spray head assembly to move to the target coordinates, wherein at least 2 leveling coordinates are set, and the leveling coordinates to which the spray head assembly is required to move are the target coordinates.

The leveling coordinates are coordinates of the spray head assembly relative to the printing platform during leveling, and the coordinates can be set in a control program of the three-dimensional forming equipment. In the present application, the coordinates being leveled are taken as target coordinates.

The number of leveling coordinates is not limited, and is 16, 25, or the like.

The distance between the target coordinates and the printing platform is greater than 5mm and less than 80mm. If the distance between the target coordinate and the printing platform is smaller than 5mm, the distance between the target coordinate and the printing platform is too short, the nozzle assembly is easy to collide with each other in the process of moving the nozzle assembly, the stereoscopic forming equipment is easy to damage, and if the distance between the target coordinate and the printing platform is larger than 80mm, the distance between the nozzle assembly and the printing platform is too long, and more printing time can be wasted.

S12: and driving the spray head assembly to touch the printing platform and driving the spray head assembly to continuously move towards the printing platform so as to trigger the detection device to output a feedback signal.

When the spray head component is located at the target coordinate, the spray head component is controlled to move towards the printing platform, and then the spray head component can touch the printing platform. If the target coordinates are three-dimensional coordinates, namely an x coordinate, a y coordinate and a z coordinate, the x coordinate and the y coordinate define a plane approximately parallel to the printing platform, and the size of the z coordinate is changed, so that the spray head assembly can move towards the printing platform, and the spray head assembly touches the printing platform.

After the spray head component touches the printing platform, the spray head component is driven to continuously move towards the printing platform, the spray head component is kept in contact with the printing platform continuously, but the spray head component moves relative to the detection device under the reaction force of the printing platform.

When the spray head assembly moves to a set position, the detection device can be triggered to output a feedback signal. It will be appreciated that the detection means may also continue to output a signal, and that the detection means outputs a specific signal, which is then a feedback signal, when the showerhead assembly is moved to a set position.

Specifically, a first sense terminal on the showerhead assembly interacts with a second sense terminal on the support base to provide a feedback signal.

Wherein, drive shower nozzle subassembly touching print platform to drive shower nozzle subassembly continues to remove to print platform, in order to trigger detection device output feedback signal, can include:

driving the nozzle assembly to move towards the printing platform in the height direction so that the nozzle assembly touches the printing platform;

the spray head assembly is driven to continuously move towards the printing platform, so that the spray head assembly moves relative to the detection device under the reaction force of the printing platform, and the detection device is triggered to generate a feedback signal when the spray head assembly moves to the second position.

S13: and obtaining feedback coordinates corresponding to the feedback signals, and taking the next leveling coordinate of the target coordinates according to the set sequence as the target coordinates.

And the coordinates corresponding to the feedback signals are coordinates of the spray head component relative to the printing platform when the detection device outputs the feedback signals. The three-dimensional forming equipment controls the spray head assembly to move, the time for generating the feedback signal is known according to the coordinate control, and the coordinate of the time is the feedback coordinate.

Since the number of leveling coordinates is at least 2, it is necessary to continuously measure feedback signals corresponding to other feedback coordinates, and it is necessary to use the next leveling coordinate of the target coordinates according to the set sequence as the target coordinate. The leveling coordinates are sequentially detected in a set order. The specific order in which the application is presented is not intended to be limiting.

The method for obtaining the feedback coordinates corresponding to the feedback signals, taking the next leveling coordinate of the target coordinates according to the set sequence as the target coordinates comprises the following steps:

acquiring feedback coordinates corresponding to the feedback signals and driving the nozzle assembly to stop moving;

and taking the next leveling coordinate of the target coordinate according to the set sequence as the target coordinate.

S14: repeatedly executing the driving of the spray head assembly to move to the target coordinates; the spray head assembly is driven to touch the printing platform and is driven to continuously move towards the printing platform so as to trigger the detection device to output a feedback signal; and obtaining feedback coordinates corresponding to the feedback signals, and taking the next leveling coordinate of the target coordinates according to the set sequence as the target coordinate until all the printing platform positions corresponding to the leveling coordinates are touched by the spray head assembly.

It can be understood that when the position of the printing platform corresponding to the last leveling coordinate is touched by the nozzle assembly, the next leveling coordinate of the target coordinate according to the set sequence does not exist, and the next leveling coordinate of the target coordinate according to the set sequence is not executed as the target coordinate.

S15: in response to the last feedback signal, the relative position of the showerhead assembly and the sensing device is fixed.

The last feedback signal corresponds to the last leveling coordinate. The relative positions of the spray head component and the detection device are fixed, and specifically, the relative positions of the spray head component and the supporting seat can be fixed by the fastening component, so that the leveling detection result can be directly used without compensating the height of the printing head.

S16: and driving the spray head assembly to print the model on the printing platform according to the feedback coordinates.

A fitting curved surface can be formed by fitting a plurality of feedback coordinates, such as 16 feedback coordinates, and the fitting curved surface is used as a plane of a platform, and in the printing process, the nozzle on the nozzle assembly is controlled to move along a path parallel to the fitting curved surface.

Wherein, drive shower nozzle subassembly according to feedback coordinate and print the model on print platform, include:

based on the feedback coordinates, determining a plane corresponding to the printing platform,

and controlling the spray head assembly to have equal distance with the printing platform when each layer of model is printed on the printing platform according to the coordinates corresponding to the plane.

In still another aspect, as shown in fig. 19, the present invention further provides a print control method, which may be applied to the aforementioned stereoscopic molding apparatus, the print control method including:

S21: the spray head assembly is driven to move towards the printing platform at the first coordinate so as to touch the printing platform.

A plurality of leveling coordinates may be included, the number of leveling coordinates being at least two. When the number of the leveling coordinates is two, one of the leveling coordinates is a first coordinate, the other leveling coordinate is a second coordinate, and the second coordinate is a last leveling coordinate. When the leveling coordinates include a plurality of coordinates, the detection of other coordinates can be performed as the first coordinate, and the feedback coordinates corresponding to the coordinates can be obtained.

S22: the spray head assembly is driven to continuously move towards the printing platform so as to trigger the detection device to output a first feedback signal and acquire feedback coordinates corresponding to the first feedback signal.

S23: the spray head assembly is driven to move towards the printing platform at the second coordinate so as to touch the printing platform.

S24: and driving the spray head assembly to continuously move towards the printing platform so as to trigger the detection device to output a second feedback signal and acquire feedback coordinates corresponding to the second feedback signal.

S25: in response to the second feedback signal, the relative position of the showerhead assembly and the sensing device is fixed.

S26: and driving the spray head assembly to print the model on the printing platform according to the feedback coordinates.

In the present embodiment, the explanation of the method may be referred to the aforementioned print control method.

It will be understood that the first and second of the first and second coordinates herein are merely indicative of distinction and do not include other meanings, such as order, etc.; that is, there may be other coordinates and corresponding leveling processes before the first coordinate, there may be other coordinates and corresponding leveling processes between the first coordinate and the second coordinate, and so on.

In one aspect, the present invention provides a printhead for leveling a print platform 40 of a stereoscopic shaping apparatus, the printhead comprising:

a support base 100;

the detection device 300 is connected with the supporting seat 100;

the spray head assembly 200, the spray head assembly 200 is movably connected to the supporting seat 100 to move relative to the supporting seat 100, the spray head assembly 200 comprises a first position and a second position relative to the supporting seat 100, and the second position is a position for triggering the detecting device 300 to generate a feedback signal;

The detecting device 300 includes a first detecting terminal 310 and a second detecting terminal 320, the first detecting terminal 310 is connected with the supporting base 100, and the second detecting terminal 320 is connected with the showerhead assembly 200; the showerhead assembly 200 drives the second detecting terminal 320 to move, so that a feedback signal is generated when the first detecting terminal 310 interacts with the second detecting terminal 320;

The first detection terminal 310 is a baffle plate, and the second detection terminal 320 is a trigger switch;

alternatively, the first detection terminal 310 is a trigger switch, and the second detection terminal 320 is a shutter;

The fastening assembly 400 includes a fastening head assembly 410 and a driving assembly 420, the driving assembly 420 is in driving connection with the fastening head assembly 410, and the driving assembly 420 is used for driving the fastening head assembly 410 to fix the spray head assembly 200 when the detection device 300 generates a feedback signal;

the fastening head assembly 410 comprises a first claw 411 and a second claw 412, the first claw 411 and the second claw 412 are respectively movably connected with the supporting seat 100, the spray head assembly 200 is at least partially positioned between the first claw 411 and the second claw 412, the driving assembly 420 is connected with the supporting seat 100, and the first claw 411 and/or the second claw 412 are connected with the driving assembly 420;

the driving assembly 420 is used to drive the first jaw 411 and/or the second jaw 412 to move to clamp or unclamp the showerhead assembly 200.

The first clamping jaw 411 and the second clamping jaw 412 are arranged in a crossing manner and are rotationally connected, the first clamping jaw 411 and the second clamping jaw 412 are enclosed into a first clamping space 413 and a second clamping space 414 which are positioned at two sides of the crossing point, and at least part of the spray head assembly 200 is positioned in the first clamping space 413;

The driving assembly 420 changes the size of the first clamping space 413 by changing the size of the second clamping space 414 so that the showerhead assembly 200 is clamped or unclamped.

The first jaw 411 is provided with a first opening 4111, the second jaw 412 is provided with a second opening 4121, and the first jaw 411 and the second jaw 412 are arranged in a crossing manner through the first opening 4111 and the second opening 4121, so that the first jaw 411 and the second jaw 412 correspond to the same height of the spray head assembly 200;

and/or the spray head assembly 200 is provided with the stud 222, and the first jaw 411 and the second jaw 412 are opposite to the stud 222.

The driving assembly 420 includes a power member 421 and an adjusting head 422, the power member 421 is connected with the supporting seat 100, the adjusting head 422 is connected with the power member 421, the adjusting head 422 is located in the second clamping space 414, and the power member 421 is used for driving the adjusting head 422 to move;

the adjusting head 422 is in a cylindrical structure, the adjusting head 422 is used for rotating along an axis under the driving of the power piece 421, the outer walls of the two radial sides of the adjusting head 422 are respectively abutted against the first clamping jaw 411 and the second clamping jaw 412, and the width of the adjusting head 422 in the first radial direction is larger than that of the adjusting head 422 in the second radial direction;

alternatively, the adjustment head 422 includes a first protrusion for abutting against or separating from the first jaw 411 and a second protrusion for abutting against or separating from the second jaw 412, and the power member 421 is used for driving the adjustment head 422 to rotate.

The fastening assembly 400 further comprises a cushion block 430, the cushion block 430 comprises a first expansion head 431, a second expansion head 432 and a base plate 433, the base plate 433 is connected with the supporting seat 100, the first expansion head 431 and the second expansion head 432 are elastically connected with the base plate 433, the first expansion head 431 is located between the first clamping jaw 411 and the spray head assembly 200, and the second expansion head 432 is located between the second clamping jaw 412 and the spray head assembly 200;

the first expansion head 431 and the second expansion head 432 are used for providing elastic force for the first claw 411 and the second claw 412 to move oppositely;

the material of the pad 430 includes rubber.

Wherein the spray head assembly 200 includes a nozzle assembly 210, a sliding rod 220, and an elastic member 230;

the sliding rod 220 is movably connected to the supporting seat 100, the nozzle assembly 210 is connected to the sliding rod 220, and the elastic member 230 is disposed between the nozzle assembly 210 and the supporting seat 100;

the elastic member 230 serves to apply an elastic force to the nozzle assembly 210 to move away from the support base 100.

Wherein, the supporting seat 100 is provided with a through hole 110, the sliding rod 220 movably passes through the through hole 110, two ends of the sliding rod 220 are respectively positioned at two sides of the supporting seat 100, the sliding rod 220 is provided with a first guide piece 221, the through hole 110 is provided with a second guide piece 111, the first guide piece 221 interacts with the second guide piece 110, and the sliding rod 220 is circumferentially limited.

Wherein the printhead further comprises a heat dissipating housing assembly 500 and a mount assembly 600;

the heat dissipating housing assembly 500 includes a housing 510 and a fan assembly 520. Mount assembly 600 includes a mounting plate 610 and a slider 620;

the housing 510 is connected to the mounting plate 610 and encloses an accommodating space in which the print head is located, the support base 100 is connected to the mounting plate 610, and the nozzle 211 of the head assembly 200 is located outside the accommodating space;

the fan assembly 520 is located between the printhead and the housing 510 for dissipating heat from a heat sink or mold of the spray head assembly 200, and the slider 620 is connected to a side of the mounting plate 610 opposite the printhead, and the slider 620 is also used to connect to a guide frame assembly of the stereolithography apparatus.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A printhead, the printhead comprising:

a support base;

the detection device is connected with the supporting seat;

The spray head assembly is movably connected to the supporting seat so as to move relative to the supporting seat; the spray head assembly comprises a first position and a second position relative to the supporting seat, wherein the second position is a position for triggering the detection device to generate a feedback signal;

and the fastening component is connected with the supporting seat so as to respond to the feedback signal generated by the detection device to fix the spray head component.

2. The printhead of claim 1, wherein the printhead further comprises:

the detection device comprises a first detection terminal and a second detection terminal, the first detection terminal is connected with the supporting seat, and the second detection terminal is connected with the spray head assembly; the spray head assembly drives the second detection terminal to move, so that the feedback signal is generated when the first detection terminal interacts with the second detection terminal;

or the first detection terminal is a trigger switch, and the second detection terminal is a baffle plate;

the trigger switch is used for generating the feedback signal under the action of the baffle plate.

3. The printhead of claim 1 wherein the printhead is configured to,

the fastening assembly comprises a fastening head assembly and a driving assembly, wherein the driving assembly is in driving connection with the fastening head assembly, and the driving assembly is used for driving the fastening head assembly to fix the spray head assembly when the detection device generates the feedback signal.

4. A printhead according to claim 3, wherein the fastening head assembly comprises a first jaw and a second jaw, the first jaw and the second jaw being respectively movably connected to the support, the nozzle assembly being at least partially located between the first jaw and the second jaw, the drive assembly being connected to the support, the first jaw and/or the second jaw being connected to the drive assembly;

5. The printhead of claim 4 wherein said first jaw and said second jaw are disposed crosswise and are rotatably connected, said first jaw and said second jaw enclosing a first nip space and a second nip space on opposite sides of the intersection point, said nozzle assembly being at least partially located in said first nip space;

6. The printhead of claim 5 wherein the printhead is configured to,

and/or the spray head assembly is provided with a non-slip protrusion, and the first claw and the second claw are opposite to the non-slip protrusion.

7. The printhead of claim 5 wherein the printhead is configured to,

the driving assembly comprises a power piece and an adjusting head, the power piece is connected with the supporting seat, the adjusting head is connected with the power piece, the adjusting head is located in the second clamping space, and the power piece is used for driving the adjusting head to move;

8. The printhead of claim 4 wherein the printhead is configured to,

the first expansion head and the second expansion head are used for providing elastic force for the first claw and the second claw to move oppositely;

the cushion block is made of rubber.

9. The printhead of claim 1 wherein the printhead is configured to,

the spray head assembly comprises a spray nozzle assembly, a sliding rod and an elastic piece;

the sliding rod is movably connected to the supporting seat, the nozzle assembly is connected with the sliding rod, and the elastic piece is arranged between the nozzle assembly and the supporting seat;

The elastic piece is used for applying elastic force to the nozzle assembly, wherein the elastic force moves away from the supporting seat;

the two ends of the sliding rod are respectively positioned at the two sides of the supporting seat;

the sliding rod is movably connected to the through hole in a through mode, a first guide piece is arranged on the sliding rod, a second guide piece is arranged on the through hole, the first guide piece interacts with the second guide piece, and circumferential limiting is conducted on the sliding rod;

the printhead further includes a heat dissipating housing assembly and a mount assembly;

the fan assembly is located between the printing head and the shell and used for radiating heat of the radiating block or the model of the spray head assembly, the sliding piece is connected with one side of the mounting plate, which is opposite to the printing head, and the sliding piece is also used for connecting a guide frame assembly of the three-dimensional forming equipment.

10. A stereolithography apparatus as claimed in any one of claims 1 to 9, comprising a print head as claimed in any one of claims 1 to 9, a base, a guide drive assembly and a print platform, said guide drive assembly being connected to said base, said slide and said print platform being respectively connected to said guide drive assembly, said guide drive assembly being adapted to drive said print head to move relative to said print platform, said spray head assembly moving towards a second position upon touching said print platform;

the spray head assembly is also used for spraying printing consumables.

11. A print control method, characterized by comprising:

12. A print control method, characterized by comprising: