Binder spraying automatic circulation powder supply device

Abstract

The utility model discloses an automatic circulation powder supply device for binder spraying, a forming mechanism, two powder supply mechanisms and two powder recovery cylinders are collinear along an x axis and are distributed at intervals, the forming mechanism is positioned between the two powder supply mechanisms, and the powder recovery cylinders are arranged between the forming mechanism and each powder supply mechanism; a door cover used for covering an inlet of each powder recovery cylinder is hinged to the corresponding powder recovery cylinder, and the door covers can be driven by first air cylinders to rotate to be attached to the inner walls of the corresponding powder recovery cylinders so as to open the inlets of the corresponding powder recovery cylinders. The powder falling mechanism is connected to the rack through a third reciprocating linear motion driving mechanism and can reciprocate in the x-axis direction, the inlet end of the powder falling mechanism communicates with a vacuum feeding machine through a first telescopic pipe, and meanwhile the discharging end of the powder falling mechanism detachably communicates with an inlet of any powder supply mechanism. According to the utility model, powder can be supplemented without shutdown.

Description

TECHNICAL FIELD

[0001] The utility model relates to binder jetting 3D printing technical field, more specifically relates to a kind of binder jetting automatic circulation powder supply device. BACKGROUND

[0002] Binder jetting technology is a kind of two-dimensional section data according to model, using inkjet printing mode to be selectively sprayed to powder bed layer by layer by binder, to form the bonded body by penetration, diffusion effect, obtain the new type of additive manufacturing technology with ideal mechanical performance parts by degreasing, sintering or hot isostatic pressing etc., it has broad application prospect, has become the focus of global each additive manufacturing manufacturer to develop equipment research and study.

[0003] At present, in the powder supply process of binder jetting 3D printing, only one powder supply mechanism is used to supply powder, so that the powder in the powder supply mechanism needs to be stopped to supplement the powder in the powder supply mechanism after the powder is used up.But, if the additive manufacturing equipment is suspended due to lack of powder during preparation, and then processed after adding powder, the prepared parts cannot be effectively connected due to the long solidification time of binder, resulting in preparation failure, and seriously affecting the production rhythm, leading to low production efficiency.

[0004] Therefore, how to provide a binder jetting automatic circulation powder supply device that can supplement powder without stopping is a technical problem that technicians in the field need to solve. UTILITY MODEL CONTENT

[0005] Therefore, the binder jetting automatic circulation powder supply device provided by the utility model can supplement powder without stopping, thereby reducing the problem that the prepared parts cannot be effectively connected due to the long solidification time of binder, and thus maintaining the continuity of printing and improving work efficiency.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The application discloses a kind of binder jetting automatic circulation powder supply devices, rack is connected with mounting platform, and powder laying roller and printing nozzle are located above the mounting platform, and are connected in the rack by first reciprocating linear motion drive mechanism and second reciprocating linear motion drive mechanism one by one, and can reciprocate along x axis direction, comprising: controller, powder falling mechanism, and forming mechanism, two powder supply mechanisms and two powder recovery cylinders are all connected on the mounting platform, and the forming mechanism, two the powder supply mechanism and two the powder recovery cylinder are collinear along x axis and interval distribution, while the forming mechanism is located between two the powder supply mechanism, the powder recovery cylinder is arranged between the forming mechanism and each the powder supply mechanism, and the inlet end of the forming mechanism, two the powder supply mechanism and two the powder recovery cylinder are flush;

[0008] Door cover for covering the inlet of each the powder recovery cylinder is hinged, and the door cover is rotatable to adhere to the inner wall of corresponding the powder recovery cylinder by first cylinder drive to open the inlet of corresponding the powder recovery cylinder;

[0009] The powder falling mechanism is connected on the rack by third reciprocating linear motion drive mechanism, and can reciprocate along x axis direction, and the inlet end of the powder falling mechanism is connected with vacuum feeder by first telescopic pipe, while the discharge end of the powder falling mechanism is detachably connected with the inlet of any one the powder supply mechanism;

[0010] The controller is electrically connected with the powder supply mechanism, the first cylinder, the third reciprocating linear motion drive mechanism, the vacuum feeder, the first reciprocating linear motion drive mechanism and the second reciprocating linear motion drive mechanism respectively.

[0011] The application uses the above technical solution, and powder can be continuously laid in the forming mechanism by two powder supply mechanisms alternately supplying powder without stopping, and the controller controls the second reciprocating linear motion drive mechanism to drive the printing nozzle to move to the top of the forming mechanism to realize printing on the layer of powder laid in the forming mechanism when a layer of powder is laid in the forming mechanism, until printing is completed. Therefore, the application can supplement powder without stopping, so that the problem of ineffective connection between the prepared parts and the previous parts caused by long binder curing time is less likely to occur, and the continuity of printing is maintained, so that the work efficiency is improved.

[0012] Preferably, the powder falling mechanism comprises a limiting cylinder, a hopper, a second telescopic pipe, a sealing cover plate and a second cylinder.

[0013] The limiting cylinder is vertically arranged, connected on the rack by the third reciprocating linear motion drive mechanism, and can reciprocate along x axis direction, while the top end and the bottom end of the limiting cylinder are both open ends.

[0014] The sealing cover plate is located at the bottom end of the limiting cylinder, the cylinder body of the second cylinder is connected to the inner wall of the limiting cylinder, the piston rod of the second cylinder is connected to the sealing cover plate, and the second cylinder is electrically connected to the controller, so that the sealing cover plate can be driven to make reciprocating lifting movement along the z-axis, so that the sealing cover plate can be detachably arranged at the inlet end of any powder supply mechanism.

[0015] The hopper and the second telescopic pipe are located in the inner cavity of the limiting cylinder, the outer wall of the hopper is connected to the inner wall of the limiting cylinder, the inlet at the top end of the hopper is flush with the open end at the top end of the limiting cylinder, and the inlet at the top end of the hopper is connected to the vacuum feeding machine through the first telescopic pipe.

[0016] The sealing cover plate has a mounting through hole, one end of the second telescopic pipe is connected to the discharge port at the bottom end of the hopper, the other end is connected to the mounting through hole, and the mounting through hole is detachably connected to the inlet of any powder supply mechanism.

[0017] The application adopts the above technical solution, and during the process of supplementing powder to the corresponding powder supply mechanism by the powder falling mechanism, the sealing cover plate is arranged at the top end of the corresponding powder supply mechanism, so that the falling powder is not easy to fly out of the corresponding powder supply mechanism.

[0018] Preferably, the powder falling mechanism further comprises an air suction pipeline and an air suction fan.

[0019] Each side wall of the limiting cylinder has a powder removal channel penetrating along the z-axis direction, and the opening at the top end of each powder removal channel is connected to one end of the air suction pipeline, and the other end of the air suction pipeline is connected to the air suction fan.

[0020] The application adopts the above technical solution, and the powder flying out of the gap between the corresponding powder supply mechanism and the corresponding sealing cover plate during the powder falling process will be sequentially removed through the powder removal channel and the air suction pipeline and discharged into the dust recovery device, so that the problem of dust raising near the corresponding powder supply cylinder is not easy to occur.

[0021] Preferably, the dust recovery device can be a collection box or a collection tank.

[0022] Preferably, the powder falling mechanism further comprises a screen, and the screen is placed in the inner cavity of the hopper, and the screen is connected to the inner wall of the hopper.

[0023] The application adopts the above technical solution, and the fineness of the supplemented powder into the corresponding powder supply mechanism is improved, so as to improve the printing quality.

[0024] Preferably, the outer wall of the limiting cylinder is connected to an ultrasonic vibrator.

[0025] The application adopts the technical scheme, and the powder in the hopper can fall more smoothly by starting the ultrasonic vibrator, so that the powder in the hopper is not easily blocked.

[0026] Preferably, the top end of the cylinder wall of each powder recovery cylinder is connected with a horizontal limiting plate, and one end of the horizontal limiting plate extends to the direction of the inlet of the corresponding powder recovery cylinder to limit the upward rotation of the door cover.

[0027] The application adopts the technical scheme, and the horizontal limiting plate limits the corresponding door cover to limit the corresponding door cover in a horizontal state.

[0028] Preferably, it further comprises two first powder receiving cylinders, and the two first powder receiving cylinders and the two powder supply mechanisms are distributed in line along the x-axis, and the two powder supply mechanisms are located between the two first powder receiving cylinders.

[0029] The application adopts the technical scheme, and the first powder receiving cylinder receives the excess powder to reduce the waste of powder.

[0030] Preferably, it further comprises:

[0031] Two second powder receiving cylinders, and the two second powder receiving cylinders correspond to the two powder supply mechanisms in line along the y-axis.

[0032] Two scraping rollers, and the two scraping rollers are located at the top end of the two powder supply mechanisms in one-to-one correspondence, and each scraping roller is connected to the rack by a fourth reciprocating linear motion driving mechanism and can reciprocate along the y-axis direction, and each fourth reciprocating linear motion driving mechanism is electrically connected with the controller.

[0033] The application adopts the technical scheme, and the scraping roller moves along the y-axis to scrape the excess powder in the corresponding powder supply cylinder and push the excess powder into the corresponding second powder receiving cylinder to reduce the waste of powder.

[0034] Preferably, the height of the powder laying roller and the two scraping rollers is the same.

[0035] The application adopts the technical scheme, and the scraping roller forms a flat powder surface in the powder supply cylinder, and the height of the powder surface is consistent with the height of the powder surface in the forming cylinder.

[0036] The application adopts the technical scheme,

[0037] Preferably, the device further comprises a drying box, and the drying box is connected to the inlet end of the vacuum feeding machine through a feeding pipe, and the two powder recovery cylinders, the two first powder receiving cylinders and the two second powder receiving cylinders are all connected to the drying box through a return pipe.

[0038] The present application adopts the above technical solution, and the powder in the drying box is transported into the hopper, so that the dried powder is not easy to block the hopper, thereby improving the smoothness of the powder falling; in addition, the powder in the two first powder receiving cylinders and the two second powder receiving cylinders is all transported into the drying box through the return pipe, so that the powder in the drying box is dried, and the dried powder can be recycled after the vacuum feeding machine is started, thereby saving resources.

[0039] Through the above technical solution, compared with the prior art, the present application provides a kind of automatic circulation powder supply device for binder spraying, which can realize the following technical effects:

[0040] The present application can supply powder to the forming mechanism by two powder supply mechanisms alternately, so that the forming mechanism can continuously lay powder without stopping, and the controller controls the second reciprocating linear motion drive mechanism to drive the printing nozzle to move above the forming mechanism to spray and print the powder laid in the forming mechanism, until the printing is completed. Therefore, the present application can supplement powder without stopping, thereby avoiding the problem that the binder solidification time is too long to form effective connection with the previously prepared parts, thereby maintaining the continuity of printing, thereby improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0042] Figure 1 It is a structure schematic view of the present application in the side view direction of a kind of automatic circulation powder supply device for binder spraying;

[0043] Figure 2 It is a structure schematic view of the present application in the top view direction of a kind of automatic circulation powder supply device for binder spraying;

[0044] Figure 3 It is a sectional view of the present application powder falling mechanism.

[0045] Figure 4It is a structure schematic diagram of the powder recycling cylinder connected with the door cover and the horizontal limiting plate respectively, and in the diagram, the door cover can be rotated from the vertical state to the horizontal state along the arrow direction in the diagram, wherein the shadow part in the diagram is the position of the door cover in the horizontal state.

[0046] Figure 5 It is a structure schematic diagram of the door cover connected with the first air cylinder.

[0047] Figure 6 It is a structure schematic diagram of the powder recycling cylinder connected with the powder roller wiping mechanism.

[0048] In the diagram, 1 is a mounting platform, 2 is a powder roller, 3 is a printing nozzle, 4 is a powder falling mechanism, 5 is a forming mechanism, 6 is a powder supply device, 7 is a powder recycling cylinder, 71 is a door cover, 72 is a first air cylinder, 73 is a horizontal limiting plate, 8 is a vacuum feeding machine, 41 is a limiting cylinder, 42 is a hopper, 43 is a second telescopic pipe, 44 is a sealing cover plate, 45 is a second air cylinder, 410 is a powder exclusion channel, 46 is a screen, 91 is a first powder receiving cylinder, 92 is a second powder receiving cylinder, 93 is a leveling roller, 61 is a powder supply cylinder, 62 is a powder supply push plate, 63 is a powder supply lead screw, 64 is a powder supply nut seat, 65 is a powder supply motor, 66 is a powder supply support, 51 is a forming cylinder, 52 is a forming push plate, 53 is a forming lead screw, 54 is a forming nut seat, 55 is a forming motor, 56 is a forming support, 701 is a fixed block, 702 is a telescopic air cylinder, 704 is a lifting air cylinder, 101 is a first guide rail, 705 is a connecting block, 706 is a driving motor, 707 is a transmission screw, 708 is a wiping member, 102 is a second guide rail, 103 is a second sliding block, 104 is an "L" shaped adapter block, and 105 is a second sliding rail. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the utility model, it is necessary to explain that, unless otherwise expressly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0052] The utility model discloses a kind of binder injection automatic circulation powder supply devices, mounting platform 1 is connected on rack, and powder laying roller 2 and printing nozzle 3 are all located above installation platform 1, and are connected on rack by first reciprocating linear motion drive mechanism and second reciprocating linear motion drive mechanism one by one correspondingly, and can all reciprocate along x axis direction, and include: controller, powder falling mechanism 4, and forming mechanism 5, two powder supply mechanisms 6 and two powder recovery cylinders 7 are all connected on installation platform 1, and forming mechanism 5, two powder supply mechanisms 6 and two powder recovery cylinders 7 are collinear along x axis and interval distribution, while forming mechanism 5 is located between two powder supply mechanisms 6, powder recovery cylinder 7 is arranged between forming mechanism 5 and each powder supply mechanism 6, and the inlet end of forming mechanism 5, two powder supply mechanisms 6 and two powder recovery cylinders 7 is flush;

[0053] Door cover 71 for covering the inlet of each powder recovery cylinder 7 is hinged, and door cover 71 is rotatable to the inner wall of corresponding powder recovery cylinder 7 by first cylinder 72 drive, to open the inlet of corresponding powder recovery cylinder 7;

[0054] Powder falling mechanism 4 is connected on rack by third reciprocating linear motion drive mechanism, and can reciprocate along x axis direction, and the inlet end of powder falling mechanism 4 is connected with vacuum feeder 8 by first telescopic pipe, while the discharge end of powder falling mechanism 4 is detachably connected with the inlet of any one powder supply mechanism 6;

[0055] The controller is electrically connected with the powder supply mechanism 6, the first cylinder 72, the third reciprocating linear motion driving mechanism, the vacuum feeding machine 8, the first reciprocating linear motion driving mechanism and the second reciprocating linear motion driving mechanism respectively.

[0056] The free end of the piston rod of the first cylinder 72 is connected to the door cover 71, and the shell of the first cylinder 72 is connected to the outer cylinder wall of the powder recovery cylinder 7.

[0057] The powder supply principle of the powder binder injection automatic circulation powder supply device without shutdown is as follows:

[0058] As shown in the figure, Figure 1 When the powder is supplied by the powder supply mechanism 6 close to the left end of the installation platform 1, the controller controls the piston rod of the first cylinder 72 corresponding to the powder recovery cylinder 7 on the left side of the forming mechanism 5 to be in a shortened state, so as to control the door cover 71 corresponding to the powder recovery cylinder 7 on the left side of the forming mechanism 5 to be in a horizontal state, so that the inlet end of the powder recovery cylinder 7 on the left side of the forming mechanism 5 is closed by the corresponding door cover 71, and the controller controls the piston rod of the first cylinder 72 corresponding to the powder recovery cylinder 7 on the right side of the forming mechanism 5 to be in an elongated state, so as to control the door cover 71 corresponding to the powder recovery cylinder 7 on the right side of the forming mechanism 5 to be in a state of rotating to adhere to the inner wall of the corresponding powder recovery cylinder 7, so that the inlet end of the powder recovery cylinder 7 on the right side of the forming mechanism 5 is in an open state.

[0059] In this case, the first reciprocating linear motion driving mechanism can drive the powder roller 2 to move along the x-axis from left to right under the control of the controller, so that the powder in the powder supply mechanism 6 close to the left end of the installation platform 1 can be pushed into the forming mechanism 5 through the door cover 71 on the left side of the forming mechanism 5 by the powder roller 2, and the remaining powder will fall into the powder recovery cylinder 7 on the right side of the forming mechanism 5 during the process of the powder roller 2 continuing to move right along the x-axis, then the first reciprocating linear motion driving mechanism drives the powder roller 2 to move left along the x-axis under the control of the controller, until the powder roller 2 returns to the left end of the powder supply mechanism 6, that is, resets to the left end of the installation platform 1. Such a cycle continues until the lower limit level sensor in the powder supply mechanism 6 close to the left end of the installation platform 1 sends a signal to the controller when the powder in the powder supply mechanism 6 close to the left end of the installation platform 1 is almost used up, then:

[0060] In the first aspect, the controller controls the third reciprocating linear motion driving mechanism to drive the powder falling mechanism 4 to move along the x-axis to be above the powder supply mechanism 6 close to the left end of the installation platform 1, and the outlet end of the powder falling mechanism 4 is connected to the inlet of the powder supply mechanism 6 close to the left end of the installation platform 1, and at the same time, the controller controls the vacuum feeder 8 to start working to pump powder into the powder falling mechanism 4 through the vacuum feeder 8, so that the powder falling mechanism 4 can supplement the powder in the powder supply mechanism 6 close to the left end of the installation platform 1 until the upper limit level sensor in the powder supply mechanism 6 close to the left end of the installation platform 1 sends a signal to the controller, and then the controller controls the vacuum feeder 8 to stop working, and controls the third reciprocating linear motion driving mechanism to drive the powder falling mechanism 4 to move to drive the powder falling mechanism 4 to move from above the powder supply mechanism 6 on the left side to the side of the powder supply mechanism 6 on the left side.

[0061] In the second aspect, the controller controls the first reciprocating linear motion driving mechanism to drive the powder laying roller 2 to move to the right side of another powder supply mechanism 6 (located on the right side of the forming mechanism 5), and controls the piston rod of the first cylinder 72 corresponding to the powder recovery cylinder 7 on the right side of the forming mechanism 5 to be in a shortened state, so as to control the door cover 71 corresponding to the powder recovery cylinder 7 on the right side of the forming mechanism 5 to be in a horizontal state, so that the inlet end of the powder recovery cylinder 7 on the right side of the forming mechanism 5 is closed by the corresponding door cover 71, and at the same time, the controller controls the piston rod of the first cylinder 72 corresponding to the powder recovery cylinder 7 on the left side of the forming mechanism 5 to be in an elongated state, so as to control the door cover 71 corresponding to the powder recovery cylinder 7 on the left side of the forming mechanism 5 to be in a state of being rotated to adhere to the inner wall of the corresponding powder recovery cylinder 7, so that the inlet end of the powder recovery cylinder 7 on the left side of the forming mechanism 5 is in an open state.

[0062] In this case, the first reciprocating linear motion driving mechanism can drive the powder laying roller 2 to move along the x-axis from right to left under the control of the controller, so that the powder in the powder supply mechanism 6 on the right side can be pushed into the forming mechanism 5 through the door cover 71 on the right side of the forming mechanism 5 by the powder laying roller 2, and the remaining powder will fall into the powder recovery cylinder 7 on the left side of the forming mechanism 5 as the powder laying roller 2 continues to move left along the x-axis during this powder laying process, and then the first reciprocating linear motion driving mechanism drives the powder laying roller 2 to move right along the x-axis under the control of the controller until the powder laying roller 2 returns to the right end of the powder supply mechanism 6, that is, resets to the right end of the powder supply mechanism 6 on the right side. This cycle continues until the lower limit level sensor in the powder supply mechanism 6 on the right side sends a signal to the controller, and at this time:

[0063] In the first aspect, the controller controls the third reciprocating linear motion driving mechanism to drive the powder falling mechanism 4 to move along the x-axis to the right side of the powder supply mechanism 6 directly above, and the discharge end of the powder falling mechanism 4 is connected to the entrance of the right side of the powder supply mechanism 6, while the controller controls the vacuum feeder 8 to start working to pump powder into the powder falling mechanism 4 through the vacuum feeder 8, so that the powder falling mechanism 4 can supplement the powder into the right side of the powder supply mechanism 6, until the upper limit level sensor in the right side of the powder supply mechanism 6 sends a signal to the controller, then the controller controls the vacuum feeder 8 to stop working, and controls the third reciprocating linear motion driving mechanism to drive the powder falling mechanism 4 to move, to drive the powder falling mechanism 4 to move from the right side of the powder supply mechanism 6 directly above to the side of the right side of the powder supply mechanism 6.

[0064] In the second aspect, the controller controls the first reciprocating linear motion driving mechanism to drive the powder laying roller 2 to move to the left side of the powder supply mechanism 6 on the left side of the forming mechanism 5, that is, to the left end of the installation platform 1, and controls the piston rod of the first cylinder 72 corresponding to the powder recovery cylinder 7 on the left side of the forming mechanism 5 to be in a shortened state, so as to control the door cover 71 corresponding to the powder recovery cylinder 7 on the left side of the forming mechanism 5 to be in a horizontal state, so that the entrance end of the powder recovery cylinder 7 on the left side of the forming mechanism 5 is closed by the corresponding door cover 71, while the controller controls the piston rod of the first cylinder 72 corresponding to the powder recovery cylinder 7 on the right side of the forming mechanism 5 to be in an elongated state, so as to control the door cover 71 corresponding to the powder recovery cylinder 7 on the right side of the forming mechanism 5 to be in a state of rotating to adhere to the inner wall of the corresponding powder recovery cylinder 7, so that the entrance end of the powder recovery cylinder 7 on the right side of the forming mechanism 5 is in an open state.

[0065] In this case, the first reciprocating linear motion driving mechanism can drive the powder laying roller 2 to move along the x-axis from left to right under the control of the controller, so that the powder in the powder supply mechanism 6 near the left end of the installation platform 1 can be pushed into the forming mechanism 5 through the door cover 71 on the left side of the forming mechanism 5 by the powder laying roller 2, and the remaining powder in this powder laying process will fall into the powder recovery cylinder 7 on the right side of the forming mechanism 5 as the powder laying roller 2 continues to move right along the x-axis, and then the first reciprocating linear motion driving mechanism drives the powder laying roller 2 to move left along the x-axis under the control of the controller, until the powder laying roller 2 returns to the left end of the powder supply mechanism 6, that is, resets to the left end of the installation platform 1.

[0066] This cycle can alternate the two powder supply mechanisms 6 to supply powder to the forming mechanism 5, so that the forming mechanism 5 can continuously lay powder without stopping, and every time a layer of powder is laid in the forming mechanism 5, the controller will control the second reciprocating linear motion driving mechanism to drive the printing head 3 to move directly above the forming mechanism 5 to realize printing on the layer of powder laid in the forming mechanism 5, until the printing is completed.

[0067] The first reciprocating linear motion driving mechanism, the second reciprocating linear motion driving mechanism and the third reciprocating linear motion driving mechanism have the same structure, which is a mature prior art: comprising a first screw rod, two first guide shafts, a first nut seat and a first motor, and the length of the first screw rod and each first guide shaft extends along the x-axis direction, and the first screw rod is rotationally connected to the rack through two first bearing seats arranged along the x-axis direction and in line, that is, two first bearing seats are connected to the rack along the x-axis direction and in line, and the first screw rod is rotationally connected to the two first bearing seats.

[0068] The two first guide shafts are separately arranged on opposite sides of the first screw rod and are connected to the rack.

[0069] The controller is electrically connected to the first motor, the output shaft of the first motor is connected to one end of the first screw rod to drive the first screw rod to rotate, and the first nut seat is screw-connected to the first screw rod, and two through holes corresponding to the two first guide shafts are formed in the first nut seat, and the first nut seat can move along the length direction of the two first guide shafts through the two through holes.

[0070] The powder laying roller 2 is connected to the first nut seat of the first reciprocating linear motion driving mechanism, the printing head 3 is connected to the first nut seat of the second reciprocating linear motion driving mechanism, and the powder falling mechanism 4 is connected to the first nut seat of the third reciprocating linear motion driving mechanism, so that when the controller controls the first motor in the first reciprocating linear motion driving mechanism to work, the first motor in the first reciprocating linear motion driving mechanism drives the corresponding first screw rod to rotate, which drives the corresponding first nut seat to move on the corresponding two first guide shafts, thereby driving the powder laying roller 2 to move correspondingly; similarly, when the controller controls the first motor in the second reciprocating linear motion driving mechanism to work, the first motor in the second reciprocating linear motion driving mechanism drives the corresponding first screw rod to rotate, which drives the corresponding first nut seat to move on the corresponding two first guide shafts, thereby driving the printing head 3 to move correspondingly; when the controller controls the first motor in the third reciprocating linear motion driving mechanism to work, the first motor in the third reciprocating linear motion driving mechanism drives the corresponding first screw rod to rotate, which drives the corresponding first nut seat to move on the corresponding two first guide shafts, thereby driving the powder falling mechanism 4 to move correspondingly.

[0071] The controller can control the direction of the corresponding first nut seat moving along the x-axis by controlling the rotation direction of the first motor.

[0072] In addition, the first reciprocating linear motion driving mechanism, the second reciprocating linear motion driving mechanism and the third reciprocating linear motion driving mechanism do not affect each other.

[0073] The powder supply mechanism 6 and the forming mechanism 5 are also mature prior art, that is:

[0074] The powder supply mechanism 6 comprises a powder supply cylinder 61, a powder supply push plate 62, a powder supply lead screw 63, a powder supply nut base 64, a powder supply motor 65 and a powder supply support 66.

[0075] The powder supply cylinder 61 is connected to the mounting platform 1 and is vertically arranged, and the powder supply push plate 62 is horizontally located in the inner cavity of the powder supply cylinder 61 and is in sliding sealing contact with the inner wall of the powder supply cylinder 61 in the z-axis direction, while the cylinder bottom of the powder supply cylinder 61 penetrates a first through hole, one end of the powder supply support 66 is connected to the bottom end of the powder supply push plate 62 through the first through hole, and the powder supply support 66 is in sliding sealing contact with the inner wall of the first through hole, and the other end of the powder supply support 66 is connected to the powder supply nut base 64, the powder supply nut base 64 is screw-connected to the powder supply lead screw 63 located outside the powder supply cylinder 61, and the powder supply lead screw 63 is rotationally connected to the mounting platform 1 through a powder supply bearing seat, while the output shaft of the powder supply motor 65 is connected to one end of the powder supply lead screw 63, so as to drive the powder supply lead screw 63 to rotate through the powder supply motor 65, and the powder supply nut base 64 can be lifted along the z-axis under the limiting action of the first through hole.

[0076] Therefore, when the powder supply mechanism 6 needs to supply powder, the corresponding powder supply motor 65 drives the corresponding powder supply lead screw 63 to rotate and drives the corresponding powder supply nut base 64 to rise under the control of the controller (the powder supply demand is generated when the powder of the lower layer is processed, mainly by the printing control software issuing commands to the controller, and the controller driving the powder supply cylinder to move), so as to drive the corresponding powder supply push plate 62 to push the powder upwards, so that the powder roller 2 can scrape the powder in the corresponding powder supply mechanism 6. The powder supply principle is mature prior art, which will not be described here.

[0077] Furthermore, the inner wall of the powder supply cylinder 61 is connected with a lower limit level sensor and an upper limit level sensor, respectively, and the lower limit level sensor is close to the bottom end of the powder supply cylinder 61, and the upper limit level sensor is close to the top end of the powder supply cylinder 61, while the lower limit level sensor and the upper limit level sensor are electrically connected with the controller.

[0078] The forming mechanism 5 comprises a forming cylinder 51, a forming push plate 52, a forming lead screw 53, a forming nut base 54, a forming motor 55 and a forming support 56.

[0079] The forming cylinder 51 is connected to the mounting platform 1 and is arranged vertically. The forming push plate 52 is horizontally located in the inner cavity of the forming cylinder 51 and slides and seals against the inner wall of the forming cylinder 51 along the z-axis. At the same time, the bottom of the forming cylinder 51 has a second through hole. One end of the forming bracket 56 passes through the second through hole and is connected to the bottom end of the forming push plate 52. The forming bracket 56 slides and seals against the inner wall of the second through hole. The other end of the forming bracket 56 is connected to the forming nut seat 54. The forming nut seat 54 is spirally connected to the forming screw 53 located outside the forming cylinder 51. The forming screw 53 is rotatably connected to the mounting platform 1 through the forming bearing seat. At the same time, the output shaft of the forming motor 55 is connected to one end of the forming screw 53 so that the forming screw 53 can be driven to rotate by the forming motor 55. Under the limiting action of the second through hole, the forming nut seat 54 can move up and down along the z-axis.

[0080] Therefore, when the controller controls the molding motor 55 to work, the molding motor 55 can drive the molding screw 53 to rotate and drive the molding nut seat 54 to rise, so as to drive the molding push plate 52 to push the powder upward, thereby facilitating printing by the print head 3.

[0081] Since the working principle of this forming mechanism 5 is existing technology, it will not be described in detail here.

[0082] To further optimize the above technical solution, a powder spreading roller wiping mechanism is connected to the powder recovery cylinder 7.

[0083] To further optimize the above technical solution, the powder spreading roller wiping mechanism includes:

[0084] Fixed block 701, telescopic cylinder 702, lifting cylinder 704, connecting block 705, drive motor 706, transmission screw 707, wiping component 708, second guide rail 102;

[0085] The fixing block 701 is fixed on the cylinder wall of the powder recovery cylinder 7. The cylinder body of the telescopic cylinder 702 is connected to the fixing block 701, and the piston rod of the telescopic cylinder 702 is connected to the cylinder body of the lifting cylinder 704. At the same time, the fixing block 701 is provided with a first guide rail 101 extending along the x-axis, and the cylinder body of the lifting cylinder 704 is connected with a first slider, which is slidably connected to the first guide rail 101. At the same time, the piston rod of the lifting cylinder 704 is connected to the connecting block 705.

[0086] The housing of the drive motor 706 is connected to the connecting block 705, and the length direction of the transmission screw 707 extends along the y-axis. At the same time, one end of the transmission screw 707 passes through the connecting block 705 and is connected to the output shaft of the drive motor 706. The transmission screw 707 is helically connected to the connecting block 705, and the wiping member 708 is connected to the transmission screw 707.

[0087] The second guide rail 102 is connected to the cylinder wall of the powder recycling cylinder 7, and the length of the second guide rail 102 extends along the y-axis direction, and the second sliding block 103 is slidingly connected to the second guide rail 102;

[0088] The first sliding groove is formed in the second sliding block 103 and extends along the z-axis direction, one end of the L-shaped adapter block 104 is connected with the first sliding rail, the first sliding rail is slidingly connected in the first sliding groove, the other end of the L-shaped adapter block 104 is provided with the second sliding groove which extends along the x-axis direction, the bottom end of the wiping member 708 is connected with the second sliding rail 105 which extends along the x-axis direction, and the second sliding rail 105 is slidingly connected in the second sliding groove.

[0089] The length of the second guide rail 102 extends along the x-axis direction, and the wiping member 708 is limited by the second guide rail 102, so that the wiping member 708 can move along the x-axis direction when the driving motor 706 drives the transmission screw 707 to rotate.

[0090] When the wiping is completed, the piston rod of the telescopic cylinder 702 and the piston rod of the lifting cylinder 704 are driven to retract and reset, and the driving motor 706 is controlled to stop rotating.

[0091] In order to further optimize the above technical scheme, the powder falling mechanism 4 comprises a limiting cylinder 41, a hopper 42, a second telescopic pipe 43, a sealing cover plate 44 and a second cylinder 45.

[0092] The limiting cylinder 41 is vertically arranged and connected to the rack through a third reciprocating linear motion driving mechanism, and can reciprocate along the x-axis direction, and the top end and the bottom end of the limiting cylinder 41 are both open ends.

[0093] The sealing cover plate 44 is located at the bottom end of the limiting cylinder 41, the cylinder body of the second cylinder 45 is connected to the inner wall of the limiting cylinder 41, the piston rod of the second cylinder 45 is connected to the sealing cover plate 44, and the second cylinder 45 is electrically connected with the controller, so that the sealing cover plate 44 can be driven to reciprocate along the z-axis direction, so that the sealing cover plate 44 can be detachably arranged at the inlet end of any one powder supply mechanism 6.

[0094] The hopper 42 and the second telescopic pipe 43 are located in the inner cavity of the limiting cylinder 41, the outer wall of the hopper 42 is connected with the inner wall of the limiting cylinder 41, the inlet at the top end of the hopper 42 is flush with the opening end at the top end of the limiting cylinder 41, and the inlet at the top end of the hopper 42 is connected with the first telescopic pipe and the vacuum feeding machine 8;

[0095] The sealing cover plate 44 is provided with a mounting through hole, one end of the second telescopic pipe 43 is connected with the outlet at the bottom end of the hopper 42, the other end is connected with the mounting through hole, and the mounting through hole is detachably connected with the inlet of any powder supply mechanism 6.

[0096] Specifically, the limiting cylinder 4 is connected to the first nut seat of the third reciprocating linear motion driving mechanism.

[0097] When the limiting cylinder 4 moves to the position directly above the powder supply cylinder 61 of the powder supply mechanism 6 (the position of the powder supply cylinder 61 is a fixed position, and the controller controls the limiting cylinder 4 to move to the position of the powder supply cylinder 61 to reach the position directly above the powder supply cylinder 61 (the position of the powder supply cylinder 61 is fixed in the space of the entire device and does not change, so the position of the powder supply cylinder 61 has a fixed coordinate value, and the limiting cylinder 4 only needs to be controlled to move to the fixed space position in the device to move above the powder supply cylinder 61)), the controller controls the piston rod of the second cylinder 45 to extend to drive the sealing cover plate 44 to descend until the sealing cover plate 44 covers the top end of the corresponding powder supply cylinder 61 (the distance between the limiting cylinder 4 and the powder supply cylinder 61 in the Z direction is a fixed value, and the controller controls the sealing cover plate 44 to descend by a fixed size to reach the top end of the powder supply cylinder 61), and then the controller stops controlling the piston rod of the second cylinder 45 to continue to extend, so that the mounting through hole is connected with the inlet of the corresponding powder supply cylinder 61 at this time, and the controller controls the vacuum feeding machine 8 to start, so that the vacuum feeding machine 8 transports the powder from the outside to the hopper 42 through the first telescopic pipe, and then the powder in the hopper 42 falls into the corresponding powder supply cylinder 61 through the second telescopic pipe 43 and the mounting through hole, so as to achieve the purpose of supplementing the powder to the corresponding powder supply cylinder 61.

[0098] When the powder in the corresponding powder supply cylinder 61 is supplemented to a certain amount, the upper limit level sensor in the corresponding powder supply cylinder 61 sends a signal to the controller, the controller controls the vacuum feeding machine 8 to stop working, and drives the limiting cylinder 4 to move to one side of the corresponding powder supply cylinder 61 through the third reciprocating linear motion driving mechanism, and controls the piston rod of the second cylinder 45 to shorten to drive the sealing cover plate 44 to rise, so that the top end of the corresponding powder supply cylinder 61 is free of obstacles.

[0099] In order to further optimize the above technical scheme, the powder falling mechanism 4 further comprises: a suction pipeline and a suction fan (the suction fan is a separate device, which is a mature existing technology and is kept open during processing);

[0100] Each side wall of the limiting cylinder 41 is penetrated by a powder discharge channel 410 along the z-axis direction, and the opening at the top end of each powder discharge channel 410 is connected to one end of an air suction duct, and the other end of the air suction duct is connected to an air suction fan.

[0101] During the process of supplying powder into the corresponding powder supply cylinder 61, the sealing cover plate 44 is arranged at the top end of the corresponding powder supply cylinder 61, and the air suction fan is started. Under the action of the air suction fan, the powder flying out of the gap between the corresponding powder supply cylinder 61 and the corresponding sealing cover plate 44 during the powder falling process will be sequentially discharged through the powder discharge channel 410 and the air suction duct, and then be discharged into the dust collection device, thereby avoiding the problem of dust raising near the corresponding powder supply cylinder 61.

[0102] Among them, the vacuum feeding machine 8 is a mature existing technology, and its structure and working principle will not be described here.

[0103] In order to further optimize the above technical solution, the powder falling mechanism 4 further comprises a screen 46, and the screen 46 is placed horizontally in the inner cavity of the hopper 42, and the screen 46 is connected with the inner wall of the hopper 42.

[0104] After the vacuum feeding machine 8 transports the powder from the outside to the hopper 42 through the first telescopic pipe, the powder in the hopper 42 is filtered through the screen 46, and then the filtered powder passing through the screen 46 falls into the corresponding powder supply cylinder 61 through the second telescopic pipe 43 and the mounting hole, thereby improving the fineness of the powder supplemented into the corresponding powder supply cylinder 61, and improving the printing quality.

[0105] In order to further optimize the above technical solution, the outer wall of the limiting cylinder 41 is connected with an ultrasonic vibrator.

[0106] Among them, the ultrasonic vibrator is an independent device with a dedicated controller, which is a mature existing technology, and its structure and working principle will not be described here.

[0107] During the process of supplementing powder into the corresponding powder supply cylinder 61, the ultrasonic vibrator is started to make the powder in the hopper 42 fall more smoothly, thereby avoiding the problem of powder blocking in the hopper 42.

[0108] In order to further optimize the above technical solution, the top end of the cylinder wall of each powder recycling cylinder 7 is connected with a horizontal limiting plate 73, and one end of the horizontal limiting plate 73 extends to the direction of the inlet of the corresponding powder recycling cylinder 7, so as to limit the upward rotation of the limiting door cover 71.

[0109] When it is needed to control the door cover 71 to rotate to the horizontal state, the controller controls the piston rod of the corresponding first air cylinder 72 to shorten, so as to control the corresponding door cover 71 to rotate counterclockwise (upward), and when the corresponding door cover 71 rotates to contact the corresponding horizontal limiting plate 73, the horizontal limiting plate 73 limits the corresponding door cover 71, so as to limit the corresponding door cover 71 in the horizontal state.

[0110] The angle of upward rotation of the door cover 71 is a fixed angle, and the horizontal limiting plate 73 is provided to prevent the door cover 71 from being excessively rotated.

[0111] In order to further optimize the above technical solution, it further comprises two first powder receiving cylinders 91, and the two first powder receiving cylinders 91 are distributed in line along the x-axis with the two powder supply mechanisms 6, and the two powder supply mechanisms 6 are located between the two first powder receiving cylinders 91.

[0112] When powder is supplied through the left end powder supply mechanism 6, the powder laying roller 2 lays the powder in the left end powder supply mechanism 6 into the forming mechanism 5, and pushes the remaining powder into the powder recycling cylinder 7 located on the right side of the forming mechanism 5, and then the first reciprocating linear motion driving mechanism drives the powder laying roller 2 to move leftward along the x-axis under the control of the controller, so as to drive the powder laying roller 2 to reset to the left end of the powder supply mechanism 6, that is, to reset to the left end of the mounting platform 1, and in the process, the powder laying roller 2 can push the residual powder into the first powder receiving cylinder 91 located on the left side.

[0113] When powder is supplied through the right end powder supply mechanism 6, the powder laying roller 2 lays the powder in the right end powder supply mechanism 6 into the forming mechanism 5, and pushes the remaining powder into the powder recycling cylinder 7 located on the left side of the forming mechanism 5, and then the first reciprocating linear motion driving mechanism drives the powder laying roller 2 to move rightward along the x-axis under the control of the controller, so as to drive the powder laying roller 2 to return to the right end of the powder supply mechanism 6, that is, to reset to the right end of the right end powder supply mechanism 6, and in the process, the powder laying roller 2 can push the residual powder into the first powder receiving cylinder 91 located on the right side.

[0114] In order to further optimize the above technical solution, it further comprises:

[0115] Two second powder receiving cylinders 92, which are one-to-one corresponding to the two powder supply mechanisms 6 along the y-axis.

[0116] Two leveling rollers 93, which are one-to-one corresponding to the top ends of the two powder supply mechanisms 6, and each leveling roller 93 is connected to the rack through a fourth reciprocating linear motion driving mechanism and can reciprocate along the y-axis direction, and each fourth reciprocating linear motion driving mechanism is electrically connected with the controller.

[0117] The structure of the fourth reciprocating linear motion driving mechanism is the same as that of the first reciprocating linear motion driving mechanism, the second reciprocating linear motion driving mechanism and the third reciprocating linear motion driving mechanism, and will not be described here. The difference between the structure of the fourth reciprocating linear motion driving mechanism and the structure of the first reciprocating linear motion driving mechanism, the second reciprocating linear motion driving mechanism and the third reciprocating linear motion driving mechanism is that the lengths of the first screw rod and the two first guide shafts of the fourth reciprocating linear motion driving mechanism extend along the y-axis direction.

[0118] In a specific application, when the controller controls the vacuum feeder 8 to stop working, and drives the limiting cylinder 4 to move to the side corresponding to the powder supply cylinder 61 by controlling the third reciprocating linear motion driving mechanism, at the same time, the controller controls the piston rod of the second cylinder 45 to shorten to drive the sealing cover plate 44 to rise, so that the top end of the corresponding powder supply cylinder 61 is free of obstacles, then the controller can control the first motor in the corresponding fourth reciprocating linear motion driving mechanism to drive the corresponding first screw rod to rotate, which will drive the corresponding first nut seat to move on the corresponding two first guide shafts, so as to drive the corresponding scraping roller 93 to move along the y-axis, so as to scrape the excess powder in the corresponding powder supply cylinder 61 and push the excess powder into the corresponding second powder receiving cylinder 92.

[0119] In order to further optimize the above technical solution, the height of the powder laying roller 2 and the two scraping rollers 93 is the same.

[0120] In order to further optimize the above technical solution, the drying box is connected to the inlet end of the vacuum feeder 8 through the feeding pipe, and the two powder recovery cylinders 7, the two first powder receiving cylinders 91 and the two second powder receiving cylinders 92 are connected to the drying box through the material returning pipe.

[0121] The drying box is a mature existing technology, which can be a Super electric heating constant temperature air drying box, laboratory high temperature industrial oven, oven, drying box, etc. Therefore, the structure and drying principle will not be described here.

[0122] The drying box is filled with powder for replenishment, and under the action of the pump of the vacuum feeder 8, the powder in the two powder recovery cylinders 7, the two first powder receiving cylinders 91 and the two second powder receiving cylinders 92 enters the drying box through the material returning pipe, so as to dry the powder in the drying box, and the dried powder can be recycled again after starting the vacuum feeder 8.

[0123] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0124] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application 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

1. An automatic powder supply device for a binder jetting system, a mounting platform (1) is connected to a frame, and a powder spreading roller (2) and a printing head (3) are located above the mounting platform (1) and are connected to the frame one by one through a first reciprocating linear motion drive mechanism and a second reciprocating linear motion drive mechanism and can reciprocate along the x-axis direction, characterized in that, The controller, the powder falling mechanism (4), the forming mechanism (5), the two powder supply mechanisms (6) and the two powder recycling cylinders (7) are all connected to the mounting platform (1), and the forming mechanism (5), the two powder supply mechanisms (6) and the two powder recycling cylinders (7) are collinear and spaced along the x-axis, the forming mechanism (5) is located between the two powder supply mechanisms (6), the powder recycling cylinder (7) is arranged between the forming mechanism (5) and each powder supply mechanism (6), and the inlet ends of the forming mechanism (5), the two powder supply mechanisms (6) and the two powder recycling cylinders (7) are flush; A door cover (71) for covering the inlet of each powder recycling cylinder (7) is hinged, and the door cover (71) is driven by a first air cylinder (72) to rotate to the inner wall of the corresponding powder recycling cylinder (7) to open the inlet of the corresponding powder recycling cylinder (7); The powder falling mechanism (4) is connected to the rack by a third reciprocating linear motion driving mechanism and can move reciprocally along the x-axis direction, and the inlet end of the powder falling mechanism (4) is connected to a vacuum feeder (8) through a first telescopic pipe, and the outlet end of the powder falling mechanism (4) is detachably connected to the inlet of any one of the powder supply mechanisms (6); The controller is electrically connected to the powder supply mechanisms (6), the first air cylinder (72), the third reciprocating linear motion driving mechanism, the vacuum feeder (8), the first reciprocating linear motion driving mechanism and the second reciprocating linear motion driving mechanism. The powder falling mechanism (4) comprises a limiting cylinder (41), a hopper (42), a second telescopic pipe (43), a sealing cover plate (44) and a second air cylinder (45); 2. The automatic powder supply device for a binder jet according to claim 1, wherein The limiting cylinder (41) is vertically arranged and connected to the rack by the third reciprocating linear motion driving mechanism and can move reciprocally along the x-axis direction, and the top end and the bottom end of the limiting cylinder (41) are both open ends; The sealing cover plate (44) is located at the bottom end of the limiting cylinder (41), the cylinder body of the second air cylinder (45) is connected to the inner wall of the limiting cylinder (41), the piston rod of the second air cylinder (45) is connected to the sealing cover plate (44), and the second air cylinder (45) is electrically connected to the controller to drive the sealing cover plate (44) to move reciprocally along the z-axis, so that the sealing cover plate (44) can be detachably arranged at the inlet end of any one of the powder supply mechanisms (6); The hopper (42) and the second telescopic pipe (43) are both located in the inner cavity of the limiting cylinder (41), the outer wall of the hopper (42) is connected to the inner wall of the limiting cylinder (41), the inlet of the hopper (42) at the top end is flush with the open end of the limiting cylinder (41) at the top end, and the inlet of the hopper (42) at the top end is connected to the vacuum feeder (8) through the first telescopic pipe; ​ The sealing cover plate (44) is provided with a mounting through hole, one end of the second telescopic pipe (43) is connected with the discharge port at the bottom end of the hopper (42), the other end is connected with the mounting through hole, and the mounting through hole is detachably connected with the inlet of any one of the powder supply mechanisms (6).

3. The automatic adhesive powder supply device according to claim 2, wherein The powder falling mechanism (4) further comprises an air suction pipeline and an air suction fan. Each side wall of the limiting cylinder (41) is provided with a powder discharge channel (410) along the z-axis direction, and the opening at the top end of each powder discharge channel (410) is connected with one end of the air suction pipeline, and the other end of the air suction pipeline is connected with the air suction fan.

4. The automatic adhesive powder supply device according to claim 2, wherein The powder falling mechanism (4) further comprises a screen (46), and the screen (46) is placed in the inner cavity of the hopper (42), and the screen (46) is connected with the inner wall of the hopper (42).

5. The automatic adhesive powder supply device according to claim 2, wherein The outer wall of the limiting cylinder (41) is connected with an ultrasonic vibrator.

6. The automatic adhesive powder supply device according to claim 1, wherein The top end of the cylinder wall of each powder recovery cylinder (7) is connected with a horizontal limiting plate (73), and one end of the horizontal limiting plate (73) extends towards the inlet direction of the corresponding powder recovery cylinder (7) to limit the upward rotation of the door cover (71).

7. The automatic adhesive powder supply device according to claim 2, wherein Further comprising: Two first powder receiving cylinders (91), and the two first powder receiving cylinders (91) are arranged in line with the two powder supply mechanisms (6) along the x-axis, and the two powder supply mechanisms (6) are located between the two first powder receiving cylinders (91).

8. The automatic adhesive jetting and circulating powder supply device according to claim 7, wherein Further comprising: Two second powder receiving cylinders (92), and the two second powder receiving cylinders (92) are arranged in line with the two powder supply mechanisms (6) along the y-axis; Two leveling rollers (93), and the two leveling rollers (93) are located at the top end of the two powder supply mechanisms (6) one by one, each leveling roller (93) is connected to the rack by a fourth reciprocating linear motion driving mechanism and can move reciprocatingly along the y-axis direction, and each fourth reciprocating linear motion driving mechanism is electrically connected with the controller.

9. The automatic adhesive jetting and circulating powder supply device according to claim 8, wherein The powder laying roller (2) and the two leveling rollers (93) have the same height.

10. The automatic adhesive powder supply device according to claim 8, wherein Further comprising: A drying box, and the drying box is connected with the inlet end of the vacuum feeder (8) through a feeding pipe, and the two powder recovery cylinders (7), the two first powder receiving cylinders (91) and the two second powder receiving cylinders (92) are connected with the drying box through a material returning pipe.

Images