CN217729675U - 3D prints coating preparation equipment - Google Patents

Abstract

The utility model provides a 3D prints coating preparation equipment, this 3D prints coating preparation equipment include spraying organism, low drive division and spraying portion. Wherein, a cavity is formed inside the sprayer body; the first driving part is arranged on the spraying machine body to output rotary power, a power output end of the first driving part is provided with a connecting part, the connecting part is detachably connected with a piece to be sprayed and is arranged in the cavity, and the first driving part can drive the connecting part to drive the piece to be sprayed to rotate; the spraying portion is arranged above the connecting portion to spray slurry to the piece to be sprayed, and the spraying portion is driven to move in a reciprocating mode along the axial direction of the power output end. The utility model discloses a 3D prints coating preparation equipment through setting up spraying portion axial reciprocating motion, treats that the spraying piece is rotated so that but the limit of treating the relative spraying portion of spraying piece is rotated by reciprocal spraying with driving. Through connecting portion with treat that the spraying can dismantle and be connected, improve the handling efficiency of treating the spraying, avoid the loaded down with trivial details scheduling problem of loading and unloading among the prior art.

Description

3D prints coating preparation equipment

Technical Field

The utility model relates to a coating preparation technical field, in particular to 3D prints coating preparation equipment.

Background

The grinding workpiece is widely applied to the fields of modern cement, electric power, mines, refractory materials, coal, chemical industry and other industries. When the grinding equipment works, the grinding workpiece needs to bear abrasion of grinding materials such as broken stones and sand grains and also needs to bear certain impact load, so that the grinding workpiece needs to have high wear resistance and certain toughness. The conventional wear-resistant protection method mainly utilizes wear-resistant casting alloy to prepare grinding workpieces, such as high-chromium cast iron and alloy steel, but the service life of the grinding workpieces is still not ensured by only improving the hardness of a base material of the grinding workpieces. If the grinding workpiece is cast and replaced again due to wear failure, great waste is caused, and meanwhile, the production cost is greatly improved.

Therefore, it is necessary to repair and reinforce the grinding workpiece. The method for preparing the wear-resistant coating to resist wear at the working part of the grinding workpiece by adopting the surface coating technology is an economical and effective means for solving the problem, thereby prolonging the service life of the grinding workpiece part, improving the operation efficiency of equipment, reducing the comprehensive cost and belonging to the field of energy-saving emission-reducing green remanufacturing.

In the actual spraying process in the prior art, the wear-resistant coating preparation work is carried out on a grinding workpiece in a manual spraying mode, and because the spraying habit and the operation proficiency of operators are different, the parameters such as the moving speed, the spraying distance and the like of a spray gun are different, so that the uniform coating thickness, the stable quality and the different and different porosity are difficult to ensure. The existing spraying equipment has a complex structure, the disassembling and assembling procedures of the grinding roller are complicated, and the large-scale production is not facilitated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing 3D prints coating preparation equipment, the automatic spraying of grinding roller machinery of being convenient for to make the grinding roller convenient the dismantlement, improve grinding roller part surface wear-resistant coating quality greatly, and then extension grinding roller part life, reduce the cost of maintenance of grinding roller.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a 3D printing coating preparation apparatus, comprising: the sprayer body is internally provided with a cavity;

the first driving part is arranged on the spraying machine body to output rotary power, a power output end of the first driving part is provided with a connecting part, the connecting part is detachably connected with a piece to be sprayed and is arranged in the cavity, and the first driving part can drive the connecting part to drive the piece to be sprayed to rotate;

the spraying portion is located the top of connecting portion, in order to treat spraying piece spraying thick liquids, just the spraying portion is ordered about and can be followed power take off end's axial reciprocating motion.

Furthermore, the connecting part comprises a supporting shaft which is pivoted between two opposite surfaces of the spraying machine body, and one end of the supporting shaft penetrates through the spraying machine body and is fixedly connected with the power output end;

treat that spraying piece cover is established in part on the back shaft, set firmly the butt on the back shaft in treat the baffle of spraying piece one end, and the spiro union in the back shaft is located treat the crimping nut of spraying piece other end, the baffle with the crimping nut restriction treat that spraying piece is in the axial displacement of back shaft.

Furthermore, the supporting shaft comprises a fixing shaft and a mounting shaft, one end of the fixing shaft is fixedly pivoted on the side wall of the spraying machine body, and the other end of the fixing shaft is connected with the mounting shaft through a universal joint; the mounting shaft is fixedly connected with the power output end of the first driving part;

the installation shaft adopts the physiosis axle, treat that the spraying piece is fixed in along radial because of the physiosis axle is aerifyd on the back shaft to because of the physiosis axle is deflated and detachable breaks away from the installation shaft.

Furthermore, one end of the inner cavity of the sprayer body, which is far away from the fixed shaft, is provided with a supporting body,

the supporter is including dismantling supporting seat and the pressure strip of connection, the supporting seat with enclose between the pressure strip and construct and be used for the through-hole that the installation axle passes through, the installation axle passes the through-hole with first drive division fixed connection.

Further, the spraying part comprises a second driving part arranged outside the spraying machine body and a material storage part driven by the output end of the second driving part to move in a reciprocating manner;

and a transmission mechanism is arranged between the second driving part and the material storage part and transmits the driving output force of the second driving part to the material storage part so as to enable the material storage part to move in a reciprocating manner.

Further, the transmission mechanism comprises a screw rod connected to the output end of the second driving part and a threaded sleeve in threaded connection with the screw rod; the material storage part is connected with the thread sleeve; the spraying machine body is fixedly provided with a guide part which is arranged above the supporting shaft in parallel, and the guide part and the screw rod are arranged along the axial direction of the supporting shaft, so that the material storage part is driven to move along the axial direction of the power output end in a reciprocating manner.

Further, a spiral guide chute formed from top to bottom is arranged on the inner wall of the material containing cavity of the material storage part;

the upper end of the spiral guide chute is communicated with the feeding hole of the material storage part, and the lower end of the spiral guide chute is communicated with the discharging hole of the material storage part.

Further, 3D prints coating preparation equipment still including locating on the material stock portion and along with material stock portion reciprocating motion's drying portion, the export orientation of drying portion treat the spraying piece with the space between the discharge gate of material stock portion.

Further, the drying part adopts a fan.

Compared with the prior art, the utility model discloses following advantage has:

(1) 3D print coating preparation equipment, through being equipped with the cavity in the flush coater body to the spraying that makes to treat the spraying piece avoids the pollution to the environment in airtight space. Through setting up spraying portion axial reciprocating motion, first drive division orders about treating the spraying piece and rotates to but the relative spraying portion of messenger treating the spraying piece is rotated the limit and is sprayed by reciprocating. And can dismantle with treating the spraying piece and be connected through connecting portion, the installation before the spraying and the dismantlement after the spraying of being convenient for. The loading and unloading efficiency of the piece to be sprayed is improved, and the problems of complex loading and unloading and the like in the prior art are solved.

(2) Through setting up baffle and crimping nut, will treat that the spraying member cover is established on the back shaft to restrict its axial displacement, so that treat that the spraying member is fixed by spraying in-process position, thereby guarantee the spraying quality.

(3) On being fixed in the lateral wall of flush coater body through the fixed axle, adopt the universal joint to be connected between installation axle and the fixed axle, the installation axle is connected and is driven rotatoryly with the power take off end of first drive division, thereby the rotary motion when the spraying of spraying piece is treated in the drive, after the spraying is accomplished, the installation axle of treating the setting of spraying piece accessible breaks away from the installation axle for the physiosis axle fast, the fixed axle is as the one end that supports, when the spraying piece is treated in loading and unloading, can avoid artifical lift, thereby reduce manual work, the loading and unloading efficiency of treating the spraying piece is improved.

(4) The drying part moves along with the material storage part in a reciprocating manner, so that the coating sprayed on the piece to be sprayed can be fixed and formed in time, and the spraying quality is ensured.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a 3D printing coating preparation apparatus according to an embodiment of the present invention;

fig. 2 is a schematic view of an installation structure of the support body according to an embodiment of the present invention.

Description of reference numerals:

1. a sprayer body; 2. a first driving section; 3. a spraying section; 4. a connecting portion; 5. a bearing seat; 6. a support body; 7. a drying section; 8. a piece to be sprayed;

31. a guide portion; 32, a first step of removing the first layer; a material storage part;

41. a support shaft; 42. a baffle plate; 43. crimping a nut;

61. a supporting seat; 62. a compression plate;

411. a fixed shaft; 412. installing a shaft;

311. a second driving section; 312. a screw; 313. a threaded sleeve; 314. a guide bar;

321. a material containing cavity; 322. a discharge port; 323. a feed inlet; 324. a spiral material guide groove.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a 3D printing coating preparation apparatus, which includes a sprayer body 1, a low driving part, and a spraying part 3. Wherein, a cavity is formed inside the sprayer body 1; the first driving part 2 is arranged on the spraying machine body 1 to output rotary power, a power output end of the first driving part 2 is provided with a connecting part 4, the connecting part 4 is detachably connected with a piece to be sprayed 8 and is arranged in the cavity, and the first driving part 2 can drive the connecting part 4 to drive the piece to be sprayed 8 to rotate; the spraying part 3 is arranged above the connecting part 4 so as to spray slurry to the piece to be sprayed 8, and the spraying part 3 is driven to move in a reciprocating mode along the axial direction of the power output end.

The 3D of this embodiment prints coating preparation equipment is through being equipped with the cavity in spraying machine body 1 to the spraying that makes to wait to spray 8 is in airtight space, avoids the pollution to the environment. Through setting up the axial reciprocating motion of spraying portion 3, first drive division 2 orders about waiting to spray 8 and rotates to it can be rotated while being reciprocal spraying to the relative spraying portion 3 of waiting to spray 8. And can be dismantled with the piece 8 that treats spraying through connecting portion 4 and be connected, be convenient for the installation before the spraying and the dismantlement after the spraying. The loading and unloading efficiency of the piece 8 to be sprayed is improved, and the problems of complex loading and unloading and the like in the prior art are avoided.

Based on the above general description, as an exemplary structure of the 3D printing coating preparation apparatus of the present embodiment, as shown in fig. 1, the sprayer body 1 is a rectangular housing, and its internal cavity is configured to follow the shape of the sprayer body 1. The first driving portion 2 of this embodiment is specifically a servo motor, the first driving portion 2 is disposed in the lower portion of the spraying machine body 1, the connecting portion 4 penetrates through the spraying machine body 1 from one side to the opposite side thereof, and the penetrating side is fixedly connected to the output shaft of the motor. In addition, in the cavity of the sprayer body 1, the spraying part 3 is arranged at the upper end of the connecting part 4, and the spraying part 3 can be driven to reciprocate along the axial direction of the power output shaft, so that the coating sprayed by the spraying part 3 is distributed in the radial direction and the axial direction of the piece to be sprayed 8.

The connecting portion 4 of the present embodiment includes a support shaft 32; a material storage part; 41, the piece 8 to be sprayed is sleeved on a part of the supporting shaft 32; a material storage part; 41, supporting the shaft 32; a material storage part; a baffle plate 42 abutting against one end of the piece to be sprayed 8 and screwed to the support shaft 32 are fixedly arranged on the bracket 41; a material storage part; 41 and a pressure welding nut 43 positioned at the other end of the piece to be sprayed 8, wherein the baffle plate 42 and the pressure welding nut 43 limit the piece to be sprayed 8 on the supporting shaft 32; a material storage part; 41. Specifically, as shown in fig. 1, the support shaft 32 of the present embodiment; a material storage part; 41 are cylindrical and arranged on the sprayhead 1 along the length direction of the sprayhead 1, on the support shaft 32; a material storage part; a baffle plate 42 is fixed at the left end of the bearing 41 in a pin joint mode, and the baffle plate 42 is circular and can be sleeved on the support shaft 32; a material storage part; 41 a fixed position. And abuts against the left side surface of the member to be sprayed 8 to restrict the member to be sprayed 8 from moving leftward. Of course, in other embodiments, a shaft retainer may be provided on the left side of the retainer 42 to restrain the retainer 42. At the support shaft 32; a material storage part; the right side of the pressing nut 43 is provided with threads, and the pressing nut 43 can be sleeved with the to-be-sprayed piece 8 and connected with the right side of the to-be-sprayed piece 8 in a screwed mode and abutted to the right side of the to-be-sprayed piece 8, so that the to-be-sprayed piece 8 is fixed. The first driving part 2 is fixed at the right side of the outer end of the sprayer body 1 through a motor fixing plate, and a power output shaft and a support shaft 32 of the first driving part 2 are enabled; a material storage part; 41 are the same in axial center.

Further, the support shaft 32; a material storage part; 41 comprises a fixed shaft 411 and a mounting shaft 412, the mounting shaft 412 is connected with the fixed shaft 411 by a universal joint, the mounting shaft 412 adopts an inflatable shaft, and the piece 8 to be sprayed is fixed on the supporting shaft 32 along the radial direction due to inflation of the inflatable shaft; a material storage part; 41 and is removably disengaged from the mounting shaft 412 by deflation of the inflation shaft. As shown in fig. 1, the fixing shaft 411 is cylindrical and inserted into the inner hole of the supporting base 61 located at the left side of the cavity, and the supporting base 61 is fixedly connected with the spraying machine body 1 by bolts. The mounting shaft 412 is connected with the fixed shaft 411 through a universal joint, and the right end of the mounting shaft 412 penetrates through the right side of the spraying machine body 1 and is fixedly connected with the power output shaft of the first driving part 2 through a plum coupling.

To further support the shaft 32; a material storage part; 41 is stable in rotation, a supporting body 6 is arranged at one end of the inner cavity of the sprayer body 1 of the embodiment, which is far away from the fixing shaft 411, the supporting body 6 comprises a supporting seat 61 and a pressing plate 62 which are detachably connected, a through hole for passing the mounting shaft 412 is enclosed between the supporting seat 61 and the pressing plate 62, and the mounting shaft 412 passes through the through hole and is fixedly connected with the first driving part 2. As shown in fig. 1 and 2, a support body 6 is disposed on the right side surface of the inner cavity of the spraying body, the support body 6 is specifically a rectangular parallelepiped structure, a U-shaped groove opening toward the mounting shaft 412 is formed on the support body 6, and the width of the U-shaped groove is adapted to the diameter of the mounting shaft 412. A pressing plate 62 is fixedly connected to the opening surface of the supporting body 6 by bolts, the pressing plate 62 is specifically configured as a step plate with an arc protrusion, and the arc protrusion end is clamped in the mounting shaft 412 to support the right-side fixing shaft 411, so that the problem of deformation of the mounting shaft 412 caused by unbalanced support in the rotation process is avoided. The support body 6 is mounted on the mounting shaft 412 coaxially with the power output shaft of the first drive unit 2.

In addition, the spraying part 3 of the present embodiment includes a second driving part 311 disposed outside the spraying machine body 1, and a material storage part driven by an output end of the second driving part 311 to reciprocate; a transmission mechanism is arranged between the second driving portion 311 and the material storage portion, and transmits the driving output force of the second driving portion 311 to the material storage portion so as to reciprocate the material storage portion. In a specific structure, as shown in fig. 1, the second driving portion 311 of the present embodiment is specifically a servo motor, and is located above the first driving portion 2 outside the sprayer body 1, and is fixedly connected to the right side surface of the sprayer body 1 by a bolt. The storage part of the embodiment is configured as a barrel-shaped structure with a cylindrical upper end and a conical lower end, a containing cavity for storing the coating is arranged in the storage part, a feed inlet 323 communicated with the containing cavity is arranged at the upper end of the storage part, the feed inlet 323 is communicated with an external storage tank for storing the coating through a connecting pipeline, and the coating is conveyed to the storage part through a power facility such as a motor or a pump. The lower end of the material storage part is provided with a discharge hole 322 communicated with the accommodating cavity, and the discharge hole 322 is positioned right above the piece to be sprayed 8.

In addition, the transmission mechanism comprises a screw 312 connected to the output end of the second driving part 311, and a threaded sleeve 313 screwed with the screw 312; the material storage part is connected with a threaded sleeve 313; the sprayer body 1 is fixedly provided with a support shaft 32 which is arranged in parallel; a material storage part; 41, the guide part 31 and the screw 312 are arranged along the supporting shaft 32; a material storage part; 41 is arranged in the axial direction so that the stock part is caused to reciprocate in the axial direction of the power take-off. As a specific embodiment, as shown in fig. 1, a screw 312 is keyed to an output shaft of the second driving portion 311, the screw 312 penetrates through the right side of the sprayer body 1 and abuts against the left side wall of the cavity, and a bearing seat 5 adapted to the diameter of the screw 312 is provided on the left side wall to support the screw 312. The axis of the screw 312 is located at the support shaft 32; a material storage part; 41 right above the axis of the shaft and along the support shaft 32; a material storage part; 41 are axially extended and arranged, a powder metallurgy bearing is sleeved on the right side of the screw 312, and the powder metallurgy bearing is arranged at the position where the screw 312 penetrates through the sprayer body 1 to prevent the screw 312 from being worn in the rotating process. The screw 312 is threaded with a threaded sleeve 313, and the upper end of the material storage part is fixedly connected with the threaded sleeve 313. And the screw sleeve 313 is provided with a through hole for the connecting pipeline to pass through so that the storage box can conveniently convey the coating into the material storage part at any time.

As shown in fig. 1, a guide rod 314 is disposed at the upper end of the screw 312 in parallel, the guide rod 314 is a cylindrical optical axis and is fixedly disposed in the inner cavity of the sprayer body 1 along the length direction of the sprayer body 1, and the threaded sleeve 313 has a through hole for allowing the guide rod 314 to pass through, so that when the threaded sleeve 313 is driven to translate, the threaded sleeve 313 drives the material storage portion to translate back and forth along the length direction of the sprayer body 1.

In order to avoid the accumulation of the coating at the discharge port 322 of the storage portion, the inner wall of the material accommodating cavity 321 of the storage portion of the embodiment is provided with a spiral material guiding groove 324 formed from top to bottom; the upper end of the spiral material guide groove 324 is communicated with a material inlet 323 of the material storage part, and the lower end of the spiral material guide groove 324 is communicated with a material outlet 322 of the material storage part. In a specific structure, as shown in fig. 1, the spiral guide groove of the present embodiment is a notch formed on the inner wall of the material storage portion and spirally descending from the top to the outlet along the axis of the material storage portion, and the cross section of the spiral guide groove is in a structure like a Chinese character 'ba' gradually enlarging toward the axis of the material storage portion, so as to facilitate the dispersion of the coating material.

In addition, the 3D printing coating preparation equipment of this embodiment still includes the drying part 7 that locates on the material stock portion and along with material stock portion reciprocating motion, and the export of drying part 7 is towards the clearance between waiting to spray painting 8 and the discharge gate 322 of material stock portion. The drying section 7 employs a fan. In other embodiments, UV curing agents and the like for curing the coating may also be used. The drying part 7 moves back and forth along with the material storage part, so that the paint sprayed on the piece to be sprayed 8 can be fixed and formed in time, and the spraying quality is ensured.

The 3D printing coating preparation equipment of the embodiment adopts coating formed by mixing Tic and adhesive for spraying, and has high viscosity and good adhesion effect. The member 8 to be sprayed in this embodiment is a circular grinding roll having an inner bore with a small clearance from the outer diameter of the mounting shaft 412.

The preparation method of the coating comprises the following steps:

(1) Workpiece surface pretreatment:

cleaning, degreasing and deoiling the surface of the piece to be sprayed 8, and coarsening the surface of the rotating roller by using sand paper to ensure that the surface roughness reaches the adhesive force suitable for spraying;

(2) Spraying a first layer:

s1, sleeving a preprocessed to-be-sprayed member 8 on a mounting shaft 412, and fixing the to-be-sprayed member 8 and the mounting shaft 412 by inflating;

s2, adding the proportioned coating into the material storage part, and driving the screw 312 to rotate by the second driving part 311; thereby driving the stock part to move in the axial direction of the screw 312 from the start end to the end of the screw 312, during which the first driving part 2 drives the support shaft 32; a material storage part; 41, the material storage part moves for the same distance every time the material storage part rotates for one circle;

s3, after the outer circumference of the piece 8 to be sprayed is fully covered by the coating in the material storage part according to the step S2, the first driving part 2 and the second driving part 311 stop driving;

(3) Spraying a second layer:

s1, the second driving part 311 drives the material storage part to move along the axial direction of the screw 312, and the second driving part 311 stops driving after the second driving part moves from the ending end to the starting end of the screw 312;

s2, the first driving part 2 drives the supporting shaft 32; a material storage part; 41 stopping after rotating by a small angle;

s3: the second driving part 311 drives the material storage part to move along the axial direction of the screw 312, and after the material storage part moves from the starting end to the ending end of the screw 312, the second driving part 311 stops driving;

s4: the steps S1 to S3 are cyclically executed until the support shaft 32; a material storage part; 41 rotating for a whole circle; the first driving part 2 and the second driving part 311 stop driving and finish printing;

(4) Sand blasting binder:

after the steps are finished, after the coating layer on the piece to be sprayed 8 is determined to be dry, spraying high-chromium cast iron powder or high-manganese steel powder into the sprayed coating grid, and adhering the high-chromium cast iron powder or the high-manganese steel powder by using a binder;

(5) Impregnation with water

And pouring the infiltration liquid on a rotating roller, rotating the rotating roller while pouring until the rotating roller rotates for the whole circle, and statically storing until a wear-resistant layer with a grid structure and compounded by high-chromium cast iron and TiC is formed on the surface of the grinding roller. The infiltration liquid is high chromium cast iron or high manganese steel solution with the temperature of 1500-1600 ℃. The high chromium cast iron or high manganese steel solution is poured on the outer circle of the grinding roller at 1500-1600 ℃, a plurality of pouring gates are arranged, the grinding roller is poured while rotating, and the molten metal, the metal powder and the TiC react at high temperature, mutually diffuse and are metallurgically combined with the outer circle of the grinding roller. The surface of the grinding roller is provided with a wear-resistant layer which is compounded by high-chromium cast iron and TiC and has a grid structure.

The coating sprayed by the 3D printing coating preparation equipment has the advantages that the TiC melting point is high at high temperature, the shape of the grid on the outer circle of the grinding roller can be guaranteed, after the TiC grid is in diffusion reaction with metal, the TiC grid forms a composite material of metal and TiC, the middle of the grid is a high-chromium cast iron or high-manganese steel substrate, and the strength and the wear resistance of the coating are improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a 3D prints coating preparation equipment which characterized in that: comprises that

The spraying machine body (1) is internally provided with a cavity;

the first driving part (2) is arranged on the spraying machine body (1) to output rotary power, a power output end of the first driving part (2) is provided with a connecting part (4), the connecting part (4) is detachably connected with a piece to be sprayed (8) and is arranged in the cavity, and the first driving part (2) can drive the connecting part (4) to drive the piece to be sprayed (8) to rotate;

the spraying part (3) is arranged above the connecting part (4) so as to spray slurry on the part to be sprayed (8), and the spraying part (3) is driven to move along the axial direction of the power output end in a reciprocating mode.

2. The 3D printing coating preparation apparatus of claim 1, wherein:

the connecting part (4) comprises a supporting shaft (41), the supporting shaft (41) is pivoted between two opposite surfaces of the spraying machine body (1), and one end of the supporting shaft (41) penetrates through the spraying machine body (1) and is fixedly connected with the power output end;

wait that spraying piece (8) cover is established in part on the back shaft (41), set firmly on back shaft (41) the butt in wait the baffle of spraying piece (8) one end, and the spiro union in back shaft (41) are located wait to spray crimping nut (43) of piece (8) other end, the baffle with crimping nut (43) restriction wait to spray piece (8) and be in the axial displacement of back shaft (41).

3. The 3D printing coating preparation apparatus of claim 2, characterized in that:

the supporting shaft (41) comprises a fixing shaft (411) and a mounting shaft (412), one end of the fixing shaft (411) is fixedly pivoted on the side wall of the spraying machine body (1), and the other end of the fixing shaft (411) is connected with the mounting shaft (412) through a universal joint; the mounting shaft (412) is fixedly connected with the power output end of the first driving part (2);

the mounting shaft (412) adopts an inflatable shaft, the piece (8) to be sprayed is fixed on the supporting shaft (41) along the radial direction due to inflation of the inflatable shaft, and is detached from the mounting shaft (412) due to deflation of the inflatable shaft.

4. The 3D printing coating preparation apparatus of claim 3, characterized in that:

a supporting body (6) is arranged at one end of the inner cavity of the sprayer body (1) far away from the fixed shaft (411),

the supporting body (6) comprises a supporting seat (61) and a pressing plate (62) which are detachably connected, a through hole for the installation shaft (412) to pass through is formed between the supporting seat (61) and the pressing plate (62) in a surrounding mode, and the installation shaft (412) penetrates through the through hole and is fixedly connected with the first driving portion (2).

5. The 3D printing coating preparation apparatus of claim 3, characterized in that:

the spraying part (3) comprises a second driving part (311) arranged outside the spraying machine body (1) and a material storage part (32) driven by the output end of the second driving part (311) to move in a reciprocating manner;

a transmission mechanism is arranged between the second driving part (311) and the material storage part (32), and the transmission mechanism transmits the driving output force of the second driving part (311) to the material storage part (32) so as to enable the material storage part (32) to move in a reciprocating manner.

6. The 3D printing coating preparation apparatus of claim 5, characterized in that:

the transmission mechanism comprises a screw rod (312) connected to the output end of the second driving part (311) and a threaded sleeve (313) in threaded connection with the screw rod (312); the material storage part is connected with the thread insert (313); the spraying machine body (1) is fixedly provided with a guide part which is arranged above the supporting shaft (41) in parallel, and the guide part and the screw (312) are arranged along the axial direction of the supporting shaft (41), so that the material storage part is driven to move in a reciprocating manner along the axial direction of the power output end.

7. The 3D printing coating preparation apparatus of claim 6, characterized in that:

a spiral material guide groove (324) formed from top to bottom is formed in the inner wall of the material containing cavity (321) of the material storage part;

the upper end of the spiral guide chute (324) is communicated with the feeding hole (323) of the material storage part, and the lower end of the spiral guide chute (324) is communicated with the discharging hole (322) of the material storage part.

8. The 3D printing coating preparation apparatus of claim 5, characterized in that:

3D prints coating preparation equipment still including locating stock portion is last and follow stock portion reciprocating motion's drying portion (7), the export orientation of drying portion (7) treat spraying piece (8) with the space between stock portion's discharge gate (322).

9. The 3D printing coating preparation apparatus of claim 8, wherein:

the drying part (7) adopts a fan.

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