CN113492082A

CN113492082A - Spraying device, coding system and coating spraying method

Info

Publication number: CN113492082A
Application number: CN202110739060.5A
Authority: CN
Inventors: 胡涛; 许永康
Original assignee: Wuhan Leadjet Science And Technology Development Co ltd
Current assignee: Wuhan Leadjet Science And Technology Development Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-10-12

Abstract

The application relates to a spraying device, a coding system and a coating spraying method, wherein the spraying device comprises a workbench and a spray head assembly, the spray head assembly comprises a spray head and a direction adjusting mechanism, the spray head is positioned above a product, the spray head is provided with a plurality of spray holes, the spray directions of the spray holes are vertical to the workbench, and the spray holes are distributed in a matrix manner and are used for spraying the product to form a coating; the direction adjusting mechanism is connected with the spray head; the sprayer also comprises a control device connected with the sprayer assembly. The direction adjusting mechanism adjusts an included angle between the matrix and the product advancing direction in a horizontal plane to change the width of a coating formed by spraying, and the control device controls the spraying amount and the spraying delay value of the spraying holes to adjust the shape and the thickness of the formed coating, so that the resource waste is reduced. And the adhesive force of the coating is enhanced, so that the coding information on the coating is firm and easy to trace.

Description

Spraying device, coding system and coating spraying method

Technical Field

The application relates to the technical field of spray printing, in particular to a spraying device, a coding system and a coating spraying method.

Background

Along with the popularization of two-dimension code application, a unique two-dimension code mark is often sprayed on a product, a user scans the product through the two-dimension code, and the user pays attention to a public platform or the product, so that the purposes of popularization and interaction and flow increase are achieved. In addition, by scanning the two-dimensional code, basic information of the goods, including the name, specification and model, batch, production date and the like of the goods can be quickly checked, and different permission settings are added, so that the information can be more conveniently traced after code scanning by inspectors and manufacturers. Meanwhile, the two-dimension code also plays a role in anti-counterfeiting and anti-channeling.

In some correlation technique, to some special products, for example when the braided bag carries out the spraying coding, what adopt is that the direct coding mode of UV ink jet numbering machine, but because the special texture structure in braided bag surface makes coding spraying information adhere to insecurely, lead to in the transportation because friction spraying information easily drops, the later stage can't read spraying information and trace back, the solution mode of generally adopting does, spout the special coating of one deck on the braided bag surface promptly product surface, effectively strengthen spouting a yard adhesive force. However, there are the following problems:

(1) because the size of the required two-dimensional code is different, the size of the corresponding coating is also different, and the size of the coating formed by spraying is difficult to adjust in a targeted manner so as to adapt to different two-dimensional codes, the condition that the coating is far greater than the two-dimensional code is easily caused, the excess part of the coating cannot be used, and the waste of resources is caused.

(2) The two-dimensional code endowed with the code on the coating is easy to appear the fuzzy phenomenon.

Disclosure of Invention

The embodiment of the application provides a spraying device, a coding system and a coating spraying method, and aims to solve the problem that the size of a coating formed by spraying is difficult to adjust in a targeted manner in the related art so as to adapt to different two-dimensional codes.

In a first aspect, there is provided a spray coating device comprising:

a work table;

a showerhead assembly, comprising:

-a spray head located above said work table and provided with a plurality of spray orifices arranged in a matrix with a spraying direction perpendicular to said work table;

-a direction adjustment mechanism connected to the spray head for adjusting the angle between the matrix and the direction of travel of the product in a horizontal plane.

In some embodiments, the spray head further comprises a control device, wherein the control device is connected with the direction adjusting mechanism and the spray head;

the control device is used for controlling the direction adjusting mechanism to rotate so as to adjust an included angle between the matrix and the product advancing direction in a horizontal plane, and controlling the spraying delay value of each spraying hole and the thickness of the coating obtained by spraying.

In some embodiments, the direction adjustment mechanism comprises:

a connecting frame arranged on the workbench and extending along the width direction of the workbench;

the rotating shaft is fixedly connected with the spray head and vertically extends upwards;

one end of the driving piece is movably assembled on the connecting frame through the mounting seat, the other end of the driving piece is connected with the rotating shaft, and the driving piece is used for driving the rotating shaft to rotate around the axis of the rotating shaft so as to drive the spray head to rotate.

In some embodiments, the drying device further comprises a drying assembly disposed on the work table, the drying assembly comprising:

the box body is hollow inside and is provided with a first channel;

and the heater is arranged in the first channel, heats the box body and is used for drying the coating formed on the product by spraying.

In some embodiments, the drying assembly further comprises:

the fan is arranged in the box body in a group mode, and the fan and the heater are arranged correspondingly;

the box body is also provided with a second channel, a partition plate with holes is arranged in the second channel, and the fan is used for conveying air entering from the second channel to the heater for heating and conveying the air from the first channel to the coating.

In a second aspect, a coding system is provided, comprising:

the spray coating device of any one of the claims; and the number of the first and second groups,

a code-assigning device located downstream of the spray coating device along a product travel direction.

In a third aspect, a coating spraying method is provided, comprising the steps of:

providing a spray coating device according to claim;

determining a spraying angle and a spraying dot matrix according to a spraying area on a product, wherein the spraying angle is an included angle between the matrix and the product advancing direction in a horizontal plane;

and adjusting the spray head to a spraying angle, and spraying according to the spraying dot matrix.

In some embodiments, determining the spray angle and the spray dot matrix according to the spray area on the product comprises the following steps:

comparing the width of the spray area to the width of the matrix:

if the width of the spraying area is larger than or equal to that of the matrix, adjusting the spraying angle to be zero so as to enable the matrix to be parallel to the advancing direction of the product;

if the width of the spraying area is smaller than that of the matrix, taking the width of the matrix as a hypotenuse of a right triangle, taking the width of the spraying area as a first right-angle side, calculating by utilizing a trigonometric function to obtain a cosine value corresponding to the first right-angle side, and taking an angle corresponding to the cosine value as a spraying angle;

dividing the length of the spraying area with the length of the spray head formed by single spraying in the length direction of the spraying area to obtain the spraying times;

and spraying according to the spraying times to form the spraying dot matrix.

In some embodiments, prior to spraying according to the spray dot matrix, the method further comprises determining a spray delay value from a spray area on the product, the determining the spray delay value comprising the steps of:

if the spraying area is in the shape of a parallelogram, setting the spraying delay value of each spray hole as zero;

if the shape of the spraying area is square or rectangular, the following steps are carried out:

taking the width of the matrix as the hypotenuse of a right triangle, taking the width of the spraying area as a first right-angle side, and respectively calculating the delay distance from each spray hole positioned on the hypotenuse to the first right-angle side;

and dividing the delay distance corresponding to each spray hole by the advancing speed of the product to obtain a spraying delay value corresponding to each spray hole, and setting correspondingly.

In some embodiments, after adjusting the nozzle to the spraying angle and before spraying according to the spraying lattice, the method further comprises the following steps:

when the spraying flow rates of the spraying holes are the same, determining the spraying time of each spraying hole according to the coating thickness;

when the spraying time lengths of the spray holes are the same, the spraying flow rate of each spray hole is determined according to the thickness of the coating.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a spraying device, as a spray head assembly comprises a spray head and a direction adjusting mechanism, a plurality of spray holes on the spray head are distributed in a matrix manner, and the spray holes are vertical to a workbench and are used for spraying a product to form a coating; the direction adjusting mechanism is connected with the spray head and is used for adjusting an included angle between the matrix and the product advancing direction in a horizontal plane so as to change the width of a coating formed by spraying; when the spraying device is used, the maximum width of one-time spraying is the width of the matrix according to the adjustment of the spraying range area, and when the width of the spraying range area is reduced, the direction adjusting mechanism enables the spray head to rotate forwards or backwards, so that the included angle between the product advancing directions in the horizontal plane is changed, the width of the formed coating is reduced, and the spraying device is suitable for different two-dimensional codes.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a coding system according to an embodiment of the present application;

fig. 2 is a schematic connection diagram of a spraying component, a drying component, a conveying component and a coding component provided in the embodiment of the present application;

FIG. 3 is a schematic perspective view of a spray assembly provided in an embodiment of the present application;

FIG. 4 is a bottom view of a spray assembly provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a spray assembly of the present application with varying spray widths;

fig. 6 is a schematic overall structure diagram of a drying assembly provided in the embodiment of the present application;

FIG. 7 is a schematic structural diagram of a drying assembly without a perforated partition plate according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a drying assembly provided with a second channel according to an embodiment of the present application;

fig. 9 is a schematic diagram of a cross section of a drying assembly provided in an embodiment of the present application.

In the figure: 1. a work table; 2. a showerhead assembly; 20. a spray head; 21. spraying a hole; 22. a rotating shaft; 23. a drive member; 24. a mounting seat; 3. a drying assembly; 30. a box body; 31. a perforated partition plate; 32. a heater; 33. a fan; 4. a transport assembly; 5. a code assigning component; 6. a UV host machine; 7. a visual inspection assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a spraying device to solve the problem that the size of a coating formed by spraying is difficult to adjust in a targeted manner in the related art so as to adapt to different two-dimensional codes.

Referring to fig. 1-5, the spraying device includes a worktable 1 and a nozzle assembly 2, the nozzle assembly 2 is installed above the worktable 1 or assembled on the worktable 1, the worktable 1 is provided with products, such as woven bags, etc., and the products move along the length direction of the worktable 1.

The spray head assembly 2 comprises a spray head 20 and a direction adjusting mechanism, the spray head 20 is positioned above a product, a plurality of spray holes 21 with spraying directions perpendicular to the workbench 1 are arranged on the spray head 20, and the spray holes 21 are distributed in a matrix and used for spraying the product to form a coating. In the initial position, the width direction of the matrix is perpendicular to the advancing direction of the product in the horizontal plane, the length direction of the matrix is parallel to the advancing direction of the product in the horizontal plane, and the matrix can be a plurality of straight lines formed along the width direction of the matrix, namely a plurality of spray holes are distributed in a straight line, as shown in fig. 3-5.

And a direction adjusting mechanism connected to the nozzle 20 and used for adjusting an angle between the matrix and the product advancing direction in the horizontal plane, i.e., an angle between the width direction of the matrix and the product advancing direction in the horizontal plane.

The width of the coating formed by spraying the product by the spray head 20 is changed by adjusting the included angle between the matrix and the product advancing direction in the horizontal plane, and the length of the coating can be determined by the spraying times of the spray head, wherein the more times, the longer the length.

As shown in fig. 1 and 5, the principle is as follows:

the advancing direction of product is A direction, and the width direction of matrix is the B direction, and the contained angle between the two is m, and the principle of change direction width is:

when the included angle m between the matrix and the product advancing direction in the horizontal plane is zero, that is, the width direction of the matrix and the product advancing direction are perpendicular to each other in the horizontal plane, the width of the coating formed by one-time spraying by the spray head 20 is the largest, and the width is equal to the width of the matrix. The shape of the coating formed by spraying is square or rectangle, and the width of the square or rectangle is the width of the matrix. When the sprayer 20 is rotated, an included angle m exists between the matrix and the product advancing direction in the horizontal plane, namely the width direction of the matrix and the product advancing direction are not vertical in the horizontal plane; the maximum width of the coating formed by one-time spraying of the spray head 20 rotates by a certain angle with the midpoint thereof as the center, the angle is the included angle between the matrix and the product advancing direction in the horizontal plane, and the shape of the coating formed by spraying is parallelogram. In the parallelogram, the length of a pair of parallel sides in the product traveling direction is the maximum width of the coating layer formed by one-time spraying by the spray head 20, and the height of the parallelogram is the width of the formed coating layer.

Through the mode, adjust the angle of shower nozzle 20 according to the regional width of spraying of difference, form corresponding coating to adapt to different two-dimensional codes, avoid appearing not corresponding the adjustment and lead to the coating to be far greater than the two-dimensional code, the waste of the spray coating that causes.

In some preferred embodiments, applicants have found that when the angle of the spray head 20 is changed to accommodate spray areas of different widths, resulting in a parallelogram-shaped coating, there is some waste as the two-dimensional code is generally square, and therefore the following arrangement is made:

the control device is additionally arranged and is connected with the direction adjusting mechanism and the spray head 20, the control device adopts a programmable controller, the direction adjusting mechanism and the spray head can be controlled according to different parameters which are required to be set, and the control device is used for controlling the direction adjusting mechanism to rotate so as to adjust the included angle between the matrix and the product advancing direction in the horizontal plane and control the spraying delay value of each spray hole 21.

The principle of controlling the spray delay value of each orifice 21 is as shown in fig. 5:

taking the width of the matrix as a hypotenuse L of the right triangle, taking the width of the spraying area to be obtained as a first right-angle side D, and respectively calculating the delay distance from each spray hole 21 positioned on the hypotenuse L to the first right-angle side D;

and dividing the delay distance corresponding to each spray hole 21 by the moving speed of the product to obtain a spraying delay value corresponding to each spray hole 21, and setting correspondingly.

Namely, one of the nozzle holes 21 is set correspondingly as a reference point, so that the width of the coating sprayed on the product is limited on the first right-angle edge D in the moving process of the product, the traveling speed of the product is constant by referring to the relation between the time and the speed, and the time from the inclined edge L to the first right-angle edge D of each nozzle hole 21 is different accordingly.

Further, the applicant has found that the coating layer enhances the adhesion capability of the two-dimensional code and is also linked to the thickness of the coating layer formed by spraying, which is required to be within a certain range, so that in order to control the spraying thickness, the control device is also required to have a function of controlling the spraying amount of the spraying hole 21, wherein the spraying amount is controlled by the spraying flow rate and the time length, for example, when the spraying flow rate is fixed and the time length is set to be larger, the amount of the coating layer sprayed from the spraying hole 21 of the spraying head 20 becomes larger, the thickness of the coating layer increases, and correspondingly, the time length is reduced, the amount of the coating layer sprayed from the spraying hole 21 becomes smaller, and the thickness of the coating layer decreases.

According to above mode, through the spraying volume of controlling means control orifice 21, adopt programmable controller setting, carry out the management and control to the spraying thickness of coating, avoid the coating thickness too big, appear being difficult for drying, lead to the condition of coding effect variation to and the thick undersize of coating, the condition that the adhesive force of coding also correspondingly reduces, thereby also satisfied the requirement to the adhesive force when guaranteeing the coding effect.

In some preferred embodiments, to facilitate movement of the spray head assembly 2 itself, to adjust the spray position on the product, to facilitate sliding, the following settings are made:

the direction adjusting mechanism comprises a connecting frame, a rotating shaft 22 and a driving piece 23, wherein the connecting frame is arranged on the workbench 1 and extends along the width direction of the workbench 1; the rotating shaft 22 is fixedly connected with the spray head 20 and vertically extends upwards;

one end of the driving member 23 is movably assembled on the connecting frame through the mounting seat 24, and the other end is connected with the rotating shaft 22, and the driving member 23 is used for driving the rotating shaft 22 to rotate around the axis thereof so as to drive the spray head 20 to rotate.

With the above arrangement, the spray position of the spray head 20 can be adjusted by moving the mounting seat 24 on the link, and when the width of the spray area is larger than the maximum width of the spray head 20 formed at one time, the spray area can be moved in the width direction of the table 1.

As shown in fig. 6-9, in some preferred embodiments, if the coating formed by spraying is not dried in time, the coded information will overlap with the coating area, which causes the problems of information blurring and being not easy to identify, and the following settings are performed:

the drying device also comprises a drying component 3 arranged on the workbench 1, wherein the drying component 3 comprises a box body 30 and a plurality of heaters 32, the box body 30 is hollow, and a first channel is arranged on the box body; a plurality of heaters 32 are assembled in the cabinet 30 and distributed along the moving direction of the product, the heaters 32 heat the air introduced from the second passage, and then the cabinet 30 is heated to dry the coating of the product passing through the bottom of the cabinet 30.

Further, the drying assembly 3 further includes a fan 33 assembled in the box body 30, and the fan 33 is arranged corresponding to the heater 32; the box 30 is further provided with a second passage, the perforated partition 31 is arranged in the second passage, and the fan 33 sends the air entering from the second passage, namely the air entering from the perforated partition 31 to the heater 32 for heating, and sends the air out from the first passage to the coating.

The reason for this is that the drying assembly 3 is located above the product, even if the product passes below the drying assembly 3, without changing the arrangement of the conveyor on the table 1, the fan 33 causes air to be sent from top to bottom to the surface of the coating formed by the product.

Wherein a plurality of fans 33's setting mainly has the effect in two aspects, utilizes fan 33 to blow the coating evenly firstly, has guaranteed to have all evenly spouted the coating in the coding scope, and on the other hand is to take the heat of heater 32 to the coating surface, reaches fast drying's effect.

Furthermore, the perforated partition plate 31 is provided with a filter screen for filtering air, so that dust or foreign matters in the air are prevented from influencing the coating.

A coding system comprising a spraying device as described above, and a coding device, wherein the coding device comprises:

two conveying assemblies 4 are arranged on the workbench 1 at intervals and are used for conveying products; the spray head assembly 2 is arranged on one of the conveying assemblies 4; the drying assembly 3 is arranged on the workbench 1 and positioned between the two conveying assemblies 4, and the drying assembly 3 is used for drying the coating; a code assigning unit 5 provided on the other transport unit 4; the UV host machine 6 is connected with the code assigning assembly 5 and is used for controlling the code assigning assembly 5 to assign codes on the dried coating; the visual inspection assembly 7 is used for reading and screening the coded products.

The visual detection assembly 7 reads the jet printing information, screens and rejects defective products, arranges and counts qualified products, carries out closed-loop management on the whole coding process, and can effectively solve the problems that the jet printing information is not firmly attached, the coding information is easy to fall in the transportation process, and the coding information cannot be read and traced.

A coating spray coating method comprising the steps of:

providing the spraying device;

and adjusting the spray head 20 to a spraying angle, and spraying according to the spraying dot matrix.

Through the spraying range of the coating in the steps, the control device adopts programmable control, parameters can be set according to needs, coating spraying printing is carried out on the coding region in a targeted mode, other regions are not sprayed, resources are effectively saved, and waste is avoided.

In some preferred embodiments, determining the spraying angle and the spraying dot matrix according to the spraying area on the product comprises the following steps:

comparing the width of the spray area with the width of the matrix:

if the width of the spraying area is larger than or equal to the width of the matrix, adjusting the spraying angle to be zero so as to enable the matrix to be parallel to the advancing direction of the product; when the distance is larger than the preset distance, the distance between the mounting seat 24 and the connecting frame is adjusted;

if the width of the spraying area is smaller than that of the matrix, taking the width of the matrix as a hypotenuse L of the right triangle, taking the width of the spraying area as a first right-angle side D, calculating by utilizing a trigonometric function to obtain a cosine value corresponding to the first right-angle side D, and taking an angle corresponding to the cosine value as a spraying angle;

dividing the length of the spraying area by the length of the spray head 20 formed by single spraying in the length direction of the spraying area to obtain the spraying times;

spraying according to the spraying times to form a spraying dot matrix; the spraying dot matrix is a rectangular dot matrix pattern, when the length of the dot matrix pattern is longer, the spraying times and the number of dots are more, the coating is longer, conversely, the length of the dot matrix pattern is reduced, the spraying times and the number of dots are reduced, and the length of the coating is correspondingly reduced.

The included angle is adjusted in the above mode to obtain a spraying dot matrix, so that spraying parameters are formed, and spraying is controlled through the control device.

In some preferred embodiments, before spraying according to the spray dot matrix, the method further comprises determining a spray delay value according to a spray area on the product, the determining the spray delay value comprising the steps of:

if the shape of the spraying area is a parallelogram, the spraying delay value of each spray hole 21 is set to be zero;

taking the width of the matrix as a hypotenuse L of the right triangle, taking the width of the spraying area as a first right-angle side D, and respectively calculating the delay distance from each spray hole 21 positioned on the hypotenuse L to the first right-angle side D;

and dividing the delay distance corresponding to each spray hole 21 by the advancing speed of the product to obtain a spraying delay value corresponding to each spray hole 21, and setting the spraying delay values correspondingly.

When the spraying delay value is set, the situation of setting directly is the situation as shown in fig. 5, that is, when the included angle m is an obtuse angle, the spraying delay value of the spray hole 21 located at the topmost end is zero, and the spray hole 21 is set as the reference point.

If the included angle m is an acute angle, the arrangement condition of each nozzle hole 21 is opposite to the case where the included angle m is an obtuse angle, that is, the spraying delay value of the nozzle hole 21 located at the topmost end is the largest, and the spraying delay value of the nozzle hole 21 located at the bottommost end is zero, and the nozzle hole 21 is set as the reference point.

And the shape of the spray area in this case is square or rectangular, the width of the square or rectangle being smaller than the width of the matrix.

In some preferred implementations, after adjusting the spray head 20 to the spray angle, and before spraying according to the spray dot matrix, the method further comprises the steps of:

when the spraying flow rates of the spray holes 21 are the same, determining the spraying time length of each spray hole 21 according to the coating thickness;

when the spray timings of the spray holes 21 are the same, the spray flow rate of each spray hole 21 is determined according to the coating thickness.

The thickness of the formed coating can be controlled by the steps selected according to requirements.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

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

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the 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. A spray coating device, characterized in that it comprises:

a table (1);

a spray head assembly (2) comprising:

-a spray head (20) located above the work table (1) and provided with a plurality of spray orifices (21) with a spraying direction perpendicular to the work table (1), the plurality of spray orifices (21) being distributed in a matrix;

-direction adjustment means connected to said spray head (20) and adapted to adjust the angle in the horizontal plane between said matrix and the direction of travel of the products.

2. A spray assembly according to claim 1 wherein:

the control device is connected with the direction adjusting mechanism and the spray head (20);

the control device is used for controlling the direction adjusting mechanism to rotate so as to adjust an included angle between the matrix and the product advancing direction in a horizontal plane, and controlling the spraying delay value of each spraying hole (21) and the thickness of the coating obtained by spraying.

3. The spray coating device of claim 1 wherein said direction adjustment mechanism comprises:

a connecting frame which is arranged on the workbench (1) and extends along the width direction of the workbench (1);

the rotating shaft (22) is fixedly connected with the spray head (20) and vertically extends upwards;

one end of the driving piece (23) is movably assembled on the connecting frame through the mounting seat (24), the other end of the driving piece is connected with the rotating shaft (22), and the driving piece (23) is used for driving the rotating shaft (22) to rotate around the axis of the driving piece so as to drive the spray head (20) to rotate.

4. A spray device according to claim 1, further comprising a drying assembly (3) arranged on the work table (1), the drying assembly (3) comprising:

a box body (30) which is hollow inside and is provided with a first channel;

and the heater (32) is arranged in the first channel, heats the box body and is used for drying the coating formed on the product by spraying.

5. A spraying device according to claim 4, characterized in that said drying assembly (3) further comprises:

a fan (33) assembled in the box body (30), wherein the fan (33) is arranged corresponding to the heater (32);

the box body (30) is also provided with a second channel, a partition plate (31) with holes is arranged in the second channel, and the fan (33) is used for sending air entering from the second channel to the heater (32) for heating and sending the air from the first channel to the coating.

6. A coding system, comprising:

the spray coating device according to any one of claims 1 to 5; and the number of the first and second groups,

7. A method of coating spray application, comprising the steps of:

providing a spray coating device according to claim 1;

and adjusting the spray head (20) to a spraying angle, and spraying according to the spraying dot matrix.

8. The coating spraying method of claim 7, wherein the determining of the spraying angle and the spraying point pattern according to the spraying area on the product comprises the steps of:

comparing the width of the spray area to the width of the matrix:

dividing the length of the spraying area with the length of the spray head (20) formed by single spraying in the length direction of the spraying area to obtain the spraying times;

and spraying according to the spraying times to form the spraying dot matrix.

9. The coating spray method of claim 7, wherein prior to spraying according to the spray dot pattern, the method further comprises determining a spray delay value from a spray area on the product, the determining the spray delay value comprising the steps of:

if the shape of the spraying area is a parallelogram, setting the spraying delay value of each spray hole (21) as zero;

taking the width of the matrix as the hypotenuse of a right triangle and the width of the spraying area as a first right-angle side, and respectively calculating the delay distance from each spray hole (21) positioned on the hypotenuse to the first right-angle side;

and dividing the delay distance corresponding to each spray hole (21) by the advancing speed of the product to obtain a spraying delay value corresponding to each spray hole (21), and setting correspondingly.

10. The coating spraying method according to claim 7, characterized in that after adjusting the spray head (20) to the spraying angle, before spraying according to the spraying point pattern, the method further comprises the steps of:

when the spraying flow rates of the spray holes (21) are the same, determining the spraying time length of each spray hole (21) according to the coating thickness;

when the spraying time lengths of the spray holes (21) are the same, the spraying flow rate of each spray hole (21) is determined according to the coating thickness.