CN219988732U - A accurate positioner for silk screen printing half tone - Google Patents

Abstract

The utility model discloses a precise positioning device for a screen printing plate, which relates to the technical field of screen printing and comprises a bottom plate, a front end on the right side of the top of the bottom plate and the bottom of a controller, wherein a fixing mechanism is arranged to avoid larger gaps between cloth and the screen printing plate when screen printing is performed, so that the screen printing is not clear enough, the fixing mechanism can fix the cloth needing to be screen printed at the middle end of the top of a sliding groove plate, the position of a screen printing pattern is conveniently positioned, the sliding groove plate can be pulled outwards, the screen printing plate can be driven to slide by a connecting block in the positioning mechanism through the positioning mechanism, and the screen printing plate in a limiting rectangular groove block can be replaced by pulling a second handle upwards, so that the precise positioning device for the screen printing plate is more practical.

Description

A accurate positioner for silk screen printing half tone

Technical Field

The utility model relates to the field of silk screen printing, in particular to a precise positioning device for a silk screen printing plate.

Background

The screen printing is to use a screen as a plate base and make a screen printing plate with graphics context by a photosensitive plate making method, the screen printing is composed of five elements, namely, the screen printing plate, a scraping plate, ink, a printing table and a printing stock, the basic principle that the meshes of the graphics context part of the screen printing plate can be penetrated by the ink and the meshes of the non-graphics context part can not be penetrated by the ink is utilized to print, the ink is poured into one end of the screen printing plate during printing, a certain pressure is applied to the ink part on the screen printing plate by the scraping plate, and meanwhile, the ink moves at a constant speed towards the other end of the screen printing plate, and is extruded onto the printing stock from the meshes of the graphics context part by the scraping plate during the movement.

When the existing accurate positioning device for the screen printing plate is optimized, most of the accurate positioning device is in the aspect of improving positioning efficiency and positioning precision, for example, chinese practical patent with the patent number of CN201921179292.4 discloses a manual screen printing plate positioning device which comprises a positioning plate, a bottom plate, a screen printing panel and a screen printing plate, wherein the positioning plate comprises a mounting part, two first bending parts and a second bending part, the mounting part is in threaded connection with the bottom plate, two first bending parts are symmetrically arranged on two opposite sides of the mounting part respectively, and the second bending part is arranged on the other side of the mounting part; the screen printing panel comprises a screen printing part and two third bending parts, wherein the two opposite sides of the screen printing part are symmetrically provided with the two third bending parts respectively, the third bending parts are close to the mounting part, and the screen printing part is provided with at least one positioning opening; the screen printing screen is hinged with the bottom plate, the screen printing screen comprises a screen and a plate frame, and the screen is installed in the center of the plate frame.

Although the precise positioning device for the screen printing plate has certain advantages in the aspects of improving the positioning efficiency and the positioning precision, the precise positioning device has certain disadvantages:

1. as shown in FIG. 7, the positioning plate is used for limiting the position of the screen printing panel to replace the traditional naked eye positioning, so that the positioning efficiency and the positioning accuracy are improved, but the screen printing panel is connected through the hinge mounting plate, so that the screen printing panel is difficult to adjust in position, the flexibility of the accurate positioning device of the screen printing screen is reduced, and the accurate positioning device of the screen printing screen is inconvenient to use.

2. The accurate positioning device for the screen printing plate only needs to slightly lift the screen printing plate when the screen printing plate is replaced, takes down the screen printing plate which is subjected to screen printing, replaces a new screen printing plate, the whole process does not need to carry out complicated positioning by human eyes, so that the screen printing efficiency and precision are greatly improved, but ink on the screen printing panel is easy to pour out when the screen printing panel is lifted, and the screen printing panel is convenient to replace.

Disclosure of Invention

Therefore, in order to solve the above-mentioned shortcomings, the present utility model provides a precise positioning device for a screen printing plate.

The utility model is realized in such a way that a precise positioning device for a screen printing plate is constructed, and the device comprises a bottom plate, and the front end on the right side of the top of the bottom plate is fixedly connected with the bottom of a controller;

the method is characterized in that: further comprises:

the left end and the right end of the bottom of the fixing mechanism are fixedly connected with the left end and the right end of the top of the bottom plate;

the front end and the rear end of the left side and the right side of the bottom of the positioning mechanism are fixedly connected with the front end and the rear end of the left side and the right side of the top of the fixing mechanism.

Preferably, the fixing mechanism includes:

the bottom of the limiting support column is fixedly connected with the front end and the rear end of the left side and the right side of the top of the bottom plate;

the inner side surfaces of the holes at the middle ends of the upper side and the lower side of the sliding plate are in sliding connection with the middle upper ends of the outer surfaces of the limit support columns;

the top of the electric push rod is fixedly connected with the middle end of the outer side end of the bottom of the sliding plate.

Preferably, the fixing mechanism further includes:

the inner side surfaces of grooves on the left side and the right side of the sliding groove plate are in sliding connection with the inner side ends of the outer surface of the sliding plate;

the upper end and the middle lower end of the outer surface of the limiting bolt are in sliding connection with the inner side surfaces of holes on the left side and the right side of the bottom of the sliding groove plate, and the middle end of the outer surface of the limiting bolt is in sliding connection with the inner side surfaces of holes on the inner side ends of the upper side and the lower side of the sliding plate;

the limiting right angle frame, limiting right angle frame top outside end and slip recess board bottom left and right sides both ends fixed connection.

Preferably, the fixing mechanism further includes:

the top of the magnet plate is fixedly connected with the middle end of the bottom of the sliding groove plate;

the left end and the right end of the top of the connecting iron rod are fixedly connected with the bottom of the limiting bolt;

the left end and the right end of the top of the first handle are fixedly connected with the middle left end of the bottom of the connecting iron rod and the middle right end of the bottom.

Preferably, the fixing mechanism further includes:

the outer side end of the spring is fixedly connected with the front side and the rear side of the outer side end of the inner side surface of the left end in the top and the right end groove in the top of the sliding groove plate;

the front side and the rear side of the middle upper end of the outer side of the sliding block are fixedly connected with the inner side of the spring, and the lower end of the outer surface of the sliding block is in sliding connection with the inner side surfaces of the middle left end of the top of the sliding groove plate and the middle right end of the top of the sliding groove plate;

the middle end of the bottom of the convex hook plate is fixedly connected with the top of the sliding block;

wherein, electric putter bottom and bottom plate top left and right sides middle-end fixed connection.

Preferably, the positioning mechanism includes:

the groove supporting plate is arranged at the lower end of the positioning mechanism;

the bottom of the limiting rectangular groove block is fixedly connected with the left side and the right side of the top of the groove supporting plate;

the screen printing screen is characterized in that the left side and the right side of the outer surface of the screen printing screen are in sliding connection with the inner side surface of the groove at the lower end of the inner side of the limiting rectangular groove block.

Preferably, the positioning mechanism further comprises:

the bottom of the scraping plate is contacted with the bottom surface of the inner side of the groove at the top of the screen printing plate;

the lower ends of the left side and the right side of the outer surface of the limiting plugboard are in sliding connection with the inner side surface of the rear side groove at the top of the limiting rectangular groove block;

the left end and the right end of the bottom of the second handle are fixedly connected with the middle left end of the top of the limiting plugboard and the middle right end of the top;

the right side of the bottom of the sliding connecting rod is fixedly connected with the middle end of the left side of the top of the screen printing plate;

the limiting convex strip block is characterized in that the outer side surface of the limiting convex strip block is in sliding connection with the inner side surface of the bottom groove in the middle of the upper end of the sliding connecting rod, and the bottom of the limiting convex strip block is fixedly connected with the middle end of the top of the limiting rectangular groove block close to the left side of the scraping plate.

Preferably, the positioning mechanism further comprises:

the inner side surface of the groove at the middle upper end on the right side of the connecting block is fixedly connected with the left end of the outer surface of the sliding connecting rod;

the middle end of the outer surface of the sliding bolt penetrates through the middle lower ends of the left side and the right side of the connecting block and is in sliding connection with the middle lower ends of the left side and the right side of the connecting block, and the right end of the outer surface of the sliding bolt is in sliding connection with the inner side surface of the hole at the left upper end of the limit rectangular groove block close to the left side of the scraping plate;

the inner side surfaces of the holes at the middle ends of the left and right sides of the limiting ring are fixedly connected with the middle right end of the outer surface of the sliding bolt;

the front end and the rear end of the left side and the right side of the bottom of the groove supporting plate are fixedly connected with the top of the limiting supporting column.

Preferably, the fixing mechanism is arranged in bilateral symmetry by taking the central axis of the bottom plate as a symmetry axis, and the inner side surfaces of the grooves on the front side and the rear side of the inner side of the grooves on the left side and the right side of the top of the limit supporting column in the fixing mechanism are in sliding connection with the outer side surfaces of the protruding blocks on the front side and the rear side of the sliding block in the fixing mechanism.

The utility model has the following advantages: the utility model provides a precise positioning device for a screen printing plate through improvement, which is improved compared with the same type of equipment as follows:

according to the accurate positioning device for the screen printing plate, the fixing mechanism is arranged, the electric push rod in the fixing mechanism works to drive the sliding plate to move upwards, the sliding plate moves to drive the sliding groove plate to move, so that the sliding groove plate can move upwards to be contacted with the bottom of the groove support plate and be tightly attached to the groove support plate, a large gap between cloth and the screen printing plate during screen printing is avoided, the screen printing is not clear enough, the fixing mechanism can fix the cloth needing to be screen printed at the middle end of the top of the sliding groove plate, the position of a screen printing pattern is conveniently positioned, and the sliding groove plate can be pulled outwards, so that the screen printing is more convenient when the cloth needing to be screen printed is fixed.

According to the accurate positioning device for the screen printing plate, the positioning mechanism is arranged, the connecting block in the positioning mechanism slides to drive the screen printing plate to slide, and the screen printing plate in the limiting rectangular groove block can be replaced by pulling the second handle upwards, so that the flexibility of the accurate positioning device for the screen printing plate is improved, and the accurate positioning device for the screen printing plate is more practical.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an enlarged view of the utility model at A in FIG. 2;

FIG. 4 is an enlarged view of the utility model at B in FIG. 2;

FIG. 5 is a schematic view of the structure of the fixing mechanism of the present utility model;

FIG. 6 is a schematic view of the positioning mechanism of the present utility model;

fig. 7 is a schematic diagram of the prior art.

Wherein: the device comprises a bottom plate-1, a controller-2, a fixing mechanism-3, a limit support column-31, a sliding plate-32, an electric push rod-33, a sliding groove plate-34, a limit plug pin-35, a limit right angle frame-36, a magnet plate-37, a connecting iron rod-38, a first handle-39, a spring-310, a sliding block-311, a convex hook plate-312, a positioning mechanism-4, a groove support plate-41, a limit rectangular groove block-42, a screen printing screen plate-43, a scraping plate-44, a limit plug plate-45, a second handle-46, a sliding connecting rod-47, a limit convex strip block-48, a connecting block-49, a sliding plug pin-410 and a limit ring-411.

Detailed Description

The principles and features of the present utility model are described below with reference to fig. 1-5, the examples being provided for illustration only and not for limitation of the scope of the utility model. The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Embodiment one:

referring to fig. 1 to 3 and 5, the accurate positioning device for a screen printing plate of the utility model comprises a bottom plate 1, and the front end of the right side of the top of the bottom plate 1 is fixedly connected with the bottom of a controller 2;

the left and right ends of the bottom of the fixing mechanism 3 are fixedly connected with the left and right ends of the top of the bottom plate 1, so that the fixing mechanism 3 is fixed;

the front and rear ends of the left and right sides of the bottom of the positioning mechanism 4 are fixedly connected with the front and rear ends of the left and right sides of the top of the fixing mechanism 3, so that the positioning mechanism 4 is fixed;

the bottom of the limit support column 31 is fixedly connected with the front end and the rear end of the left side and the right side of the top of the bottom plate 1, so that the limit support column 31 is fixed;

the inner side surfaces of the holes at the middle ends of the upper side and the lower side of the sliding plate 32 are in sliding connection with the middle upper ends of the outer surfaces of the limit support columns 31, so that the sliding plate 32 can slide;

the top of the electric push rod 33 is fixedly connected with the middle end of the outer side end of the bottom of the sliding plate 32, so that the electric push rod 33 is fixed;

the inner side surfaces of the grooves on the left side and the right side of the sliding groove plate 34 are in sliding connection with the inner side ends of the outer surface of the sliding plate 32, so that the sliding groove plate 34 can slide;

the upper end and the middle lower end of the outer surface of the limiting bolt 35 are in sliding connection with the inner side surfaces of the holes on the left side and the right side of the bottom of the sliding groove plate 34, and the middle end of the outer surface of the limiting bolt 35 is in sliding connection with the inner side surfaces of the holes on the inner side ends of the upper side and the lower side of the sliding plate 32, so that the sliding groove plate 34 can be limited by the limiting bolt 35;

the outer side end of the top of the limiting right-angle frame 36 is fixedly connected with the left and right ends of the bottom of the sliding groove plate 34, so that the limiting right-angle frame 36 is fixed;

the top of the magnet plate 37 is fixedly connected with the middle end of the bottom of the sliding groove plate 34, so that the magnet plate 37 is fixed;

the left and right ends of the top of the connecting iron rod 38 are fixedly connected with the bottom of the limiting bolt 35, so that the connecting iron rod 38 can drive the limiting bolt 35 to move;

the left end and the right end of the top of the first handle 39 are fixedly connected with the middle left end and the middle right end of the bottom of the connecting iron rod 38, so that the first handle 39 can drive the connecting iron rod 38 to move;

the outer ends of the springs 310 are fixedly connected to the front and rear sides of the outer ends of the inner side surfaces of the left end in the top and the right end in the top of the sliding groove plate 34, so that the springs 310 are fixed;

the front and back sides of the middle upper end of the outer side end of the sliding block 311 are fixedly connected with the inner side end of the spring 310, and the lower end of the outer surface of the sliding block 311 is in sliding connection with the inner side surfaces of the middle left end of the top and the middle right end of the top of the sliding groove plate 34, so that the sliding block 311 can slide;

the middle end of the bottom of the convex hook plate 312 is fixedly connected with the top of the sliding block 311, and the bottom of the electric push rod 33 is fixedly connected with the middle ends of the left side and the right side of the top of the bottom plate 1, so that the convex hook plate 312 can hook the cloth needing silk-screen printing;

the fixing mechanism 3 is arranged in bilateral symmetry by taking the central axis of the bottom plate 1 as a symmetry axis, and the inner side surfaces of the grooves on the front side and the rear side of the inner side of the grooves on the left side and the right side of the top of the limit supporting column 31 in the fixing mechanism 3 are in sliding connection with the outer side surfaces of the protruding blocks on the front side and the rear side of the sliding block 311 in the fixing mechanism 3, so that the fixing mechanism 3 can fix the cloth needing silk screen printing at the center.

The working principle of the accurate positioning device for the screen printing plate based on the embodiment 1 is as follows: the sliding block 311 is pulled towards the inner side, the sliding block 311 is pulled to slide towards the inner side under the limit of the sliding groove plate 34, the sliding block 311 slides to drive the convex hook plate 312 to move, the sliding block 311 slides to stretch the spring 310, then the cloth to be subjected to screen printing is placed on the convex hook plate 312, the convex hook on the convex hook plate 312 hooks the cloth, then the sliding block 311 is loosened, the tension force born by the spring 310 disappears, the spring 310 pulls the sliding block 311 to slide towards the outer side due to elastic potential energy, the sliding block 311 slides towards the outer side to drive the convex hook plate 312 to move, the convex hook plate 312 moves to stretch the cloth, the cloth can be stretched and flattened and can be positioned at the middle end of the top of the sliding groove plate 34, then the first handle 39 is pulled downwards to drive the connecting iron rod 38 to move downwards, the connecting iron rod 38 moves to drive the limiting bolt 35 to move, and the connecting iron rod 38 moves to the bottommost end to contact the inner side bottom end of the limiting right-angle frame 36, so that the connecting iron rod 38 is limited;

then promote slip recess board 34 to the rear side, slip recess board 34 is promoted and can slide to the rear side under the spacing of slip board 32, after promoting slip recess board 34 and slide to suitable position, hold first handle 39 and upwards pull, first handle 39 pulling can drive and connect the iron rod 38 and upwards move, connect the iron rod 38 and remove and can drive spacing bolt 35 and remove, spacing bolt 35 removes and can insert in the hole of slip recess board 34 left and right sides recess, thereby restrict slip recess board 34, when connecting the iron rod 38 and upwards remove to contact with magnet board 37, magnet board 37 can produce the magnetism with connecting the iron rod 38 and be connected and hold and connect the iron rod 38, then control electric putter 33 work through controller 2, electric putter 33 work can drive the slip board 32 and upwards remove, the slip board 32 removes and can drive slip recess board 34 and remove, make slip recess board 34 can upwards remove to contact with recess backup pad 41 bottom and paste recess backup pad 41, avoid producing great space between silk screen 43 when carrying out the silk screen printing, lead to the silk screen printing mechanism can not be fixed in the position can be fixed in order to fix the cloth to the position and can fix the cloth to the convenient to fix the position when the silk screen printing board 34, can be more convenient for the cloth can fix the position to the cloth to the top.

Embodiment two:

referring to fig. 2, 4 and 6, the precise positioning device for a screen printing plate according to the present utility model further includes a positioning mechanism 4 as compared with the first embodiment: the positioning mechanism 4 includes a groove support plate 41:

the groove supporting plate 41 is arranged at the lower end of the positioning mechanism 4, and the bottom of the limiting rectangular groove block 42 is fixedly connected with the left side and the right side of the top of the groove supporting plate 41, so that the limiting rectangular groove block 42 is fixed;

the left side and the right side of the outer surface of the screen printing plate 43 are in sliding connection with the inner side surface of the lower end groove at the inner side end of the limit rectangular groove block 42, so that the screen printing plate 43 can slide;

the bottom of the scraping plate 44 is contacted with the bottom surface of the inner side of the groove at the top of the screen printing plate 43, and the lower ends of the left side and the right side of the outer surface of the limiting plugboard 45 are in sliding connection with the inner side surface of the groove at the back side of the top of the limiting rectangular groove block 42, so that the limiting plugboard 45 can slide up and down;

the left end and the right end of the bottom of the second handle 46 are fixedly connected with the middle left end and the middle right end of the top of the limiting plugboard 45, so that the second handle 46 is fixed;

the right side of the bottom of the sliding connecting rod 47 is fixedly connected with the middle end of the left side of the top of the screen printing plate 43, so that the sliding connecting rod 47 can drive the screen printing plate 43 to slide;

the outer side surface of the limiting convex strip block 48 is in sliding connection with the inner side surface of the bottom groove in the middle of the upper end of the sliding connecting rod 47, and the bottom of the limiting convex strip block 48 is fixedly connected with the middle end of the top of the limiting rectangular groove block 42 close to the left side of the scraping plate 44, so that the limiting convex strip block 48 can play a limiting role on the sliding connecting rod 47;

the inner side surface of the groove at the middle upper end on the right side of the connecting block 49 is fixedly connected with the left end of the outer surface of the sliding connecting rod 47, so that the connecting block 49 is fixed;

the middle end of the outer surface of the sliding bolt 410 penetrates through the middle lower ends of the left side and the right side of the connecting block 49 and is in sliding connection with the middle lower ends of the left side and the right side of the connecting block 49, and the right end of the outer surface of the sliding bolt 410 is in sliding connection with the inner side surface of the hole at the left side of the limiting rectangular groove block 42 close to the left side of the scraper 44, so that the sliding bolt 410 can limit the sliding of the screen printing plate 43;

the inner surfaces of the holes at the middle ends of the left side and the right side of the limiting ring 411 are fixedly connected with the right end of the outer surface of the sliding bolt 410, and the front end and the rear end of the left side and the right side of the bottom of the groove supporting plate 41 are fixedly connected with the top of the limiting supporting column 31, so that the limiting ring 411 is fixed.

The working principle in this embodiment is: the screen printing plate 43 needing to be subjected to screen printing is inserted into the groove at the inner side of the limiting rectangular groove block 42 from the rear side of the accurate positioning device for the screen printing plate, the connecting block 49 is pulled to move forwards to move the connecting block 49, the connecting block 49 moves to drive the sliding connecting rod 47 to slide under the limit of the limiting convex strip block 48, the sliding connecting rod 47 slides to drive the screen printing plate 43 to slide under the limit of the limiting rectangular groove block 42, after the screen printing plate 43 moves to a proper position, the sliding bolt 410 is pushed to the right side to slide to the right side under the limit of the connecting block 49, the sliding bolt 410 slides to be inserted into the groove at the upper end of the left side of the limiting rectangular groove block 42 at the left end, so that the screen printing plate 43 is fixed, then the second handle 46 drives the limiting inserting plate 45 to be downwardly inserted into the groove at the rear side of the limiting rectangular groove block 42, the screen printing plate 43 is placed when the screen printing plate 43 slides under the limit of the limiting rectangular groove block 48, and the second handle 46 is pulled upwards to drive the limiting 45 to slide under the limit of the limiting rectangular groove block 43 when the screen printing plate 43 needs to be replaced, the screen printing plate 43 can be more accurately positioned by the screen printing plate 43, and the screen printing plate 43 can be replaced by the accurate positioning device.

According to the utility model, through improvement, the fixing mechanism 3 is arranged, the electric push rod 33 in the fixing mechanism 3 works to drive the sliding plate 32 to move upwards, the sliding plate 32 moves to drive the sliding groove plate 34 to move, the sliding groove plate 34 can move upwards to be contacted with the bottom of the groove supporting plate 41 and cling to the groove supporting plate 41, a large gap between cloth and the screen 43 during screen printing is avoided, the screen printing is not clear enough, the fixing mechanism 3 can fix the cloth needing screen printing at the middle end of the top of the sliding groove plate 34, the position of a screen printing pattern is conveniently positioned, the sliding groove plate 34 can be pulled outwards, the screen printing 43 can be driven to slide through the connecting block 49 in the positioning mechanism 4, the screen printing 43 can be replaced through pulling upwards, and the screen printing device used for accurately positioning the screen printing device is improved.

The basic principle and main characteristics of the utility model and the advantages of the utility model are shown and described above, standard parts used by the utility model can be purchased from market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of the parts adopt conventional means such as mature bolt rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the description is omitted.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. 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 utility model. Thus, the present utility model 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 (9)

1. The accurate positioning device for the screen printing plate comprises a bottom plate (1), and the front end of the right side of the top of the bottom plate (1) is fixedly connected with the bottom of a controller (2);

the method is characterized in that: further comprises:

the left end and the right end of the bottom of the fixing mechanism (3) are fixedly connected with the left end and the right end of the top of the bottom plate (1);

the front and rear ends of the left side and the right side of the bottom of the positioning mechanism (4) are fixedly connected with the front and rear ends of the left side and the right side of the top of the fixing mechanism (3).

2. The precise positioning device for a screen printing plate according to claim 1, wherein: the fixing mechanism (3) comprises:

the bottom of the limiting support column (31) is fixedly connected with the front end and the rear end of the left side and the right side of the top of the bottom plate (1);

the inner side surfaces of the holes at the middle ends of the upper side and the lower side of the sliding plate (32) are in sliding connection with the middle ends of the outer surfaces of the limit support columns (31);

the electric push rod (33), the middle end fixed connection of electric push rod (33) top and slide plate (32) bottom outside end.

3. The precise positioning device for a screen printing plate according to claim 2, wherein: the fixing mechanism (3) further comprises:

the inner side surfaces of the grooves on the left side and the right side of the sliding groove plate (34) are in sliding connection with the inner side ends of the outer surface of the sliding plate (32);

the upper end and the middle and lower ends of the outer surface of the limiting bolt (35) are in sliding connection with the inner side surfaces of holes on the left side and the right side of the bottom of the sliding groove plate (34), and the middle end of the outer surface of the limiting bolt (35) is in sliding connection with the inner side surfaces of holes on the inner side ends of the upper side and the lower side of the sliding plate (32);

the limiting right-angle frame (36), the outside end of the top of the limiting right-angle frame (36) is fixedly connected with the left end and the right end of the bottom of the sliding groove plate (34).

4. A precision positioning device for a screen printing plate according to claim 3, wherein: the fixing mechanism (3) further comprises:

the top of the magnet plate (37) is fixedly connected with the middle end of the bottom of the sliding groove plate (34);

the left end and the right end of the top of the connecting iron rod (38) are fixedly connected with the bottom of the limiting bolt (35);

the left end and the right end of the top of the first handle (39) are fixedly connected with the middle left end of the bottom of the connecting iron rod (38) and the middle right end of the bottom.

5. The precise positioning device for a screen printing plate according to claim 4, wherein: the fixing mechanism (3) further comprises:

the outer side end of the spring (310) is fixedly connected with the front side and the rear side of the outer side end of the inner side surface of the left end in the top and the right end in the top of the sliding groove plate (34);

the front side and the rear side of the middle upper end of the outer side end of the sliding block (311) are fixedly connected with the inner side end of the spring (310), and the lower end of the outer surface of the sliding block (311) is in sliding connection with the inner side surfaces of the middle left end of the top and the middle right end of the top groove of the sliding groove plate (34);

the middle end of the bottom of the convex hook plate (312) is fixedly connected with the top of the sliding block (311);

wherein the bottom of the electric push rod (33) is fixedly connected with the middle ends of the left side and the right side of the top of the bottom plate (1).

6. The precise positioning device for a screen printing plate according to claim 1, wherein: the positioning mechanism (4) comprises:

the groove supporting plate (41) is arranged at the lower end of the positioning mechanism (4);

the bottom of the limiting rectangular groove block (42) is fixedly connected with the left side and the right side of the top of the groove supporting plate (41);

the screen printing plate (43), the left and right sides of the outer surface of the screen printing plate (43) are connected with the inner side surface of the lower end groove at the inner side end of the limit rectangular groove block (42) in a sliding mode.

7. The precise positioning device for a screen printing plate of claim 6, wherein: the positioning mechanism (4) further comprises:

a scraper (44), wherein the bottom of the scraper (44) is contacted with the bottom surface of the inner side of the top groove of the screen printing plate (43);

the lower ends of the left side and the right side of the outer surface of the limiting plugboard (45) are in sliding connection with the inner side surface of the rear side groove at the top of the limiting rectangular groove block (42);

the left end and the right end of the bottom of the second handle (46) are fixedly connected with the middle left end of the top and the middle right end of the top of the limiting plugboard (45);

the right side of the bottom of the sliding connecting rod (47) is fixedly connected with the middle end of the top left side of the screen printing plate (43);

the limiting convex strip block (48), the outside surface of the limiting convex strip block (48) is in sliding connection with the inside surface of the bottom groove in the middle of the upper end of the sliding connecting rod (47), and the bottom of the limiting convex strip block (48) is fixedly connected with the middle end of the top of the limiting rectangular groove block (42) close to the left side of the scraping plate (44).

8. The precise positioning device for a screen printing plate of claim 7, wherein: the positioning mechanism (4) further comprises:

the inner side surface of the groove at the middle upper end of the right side of the connecting block (49) is fixedly connected with the left end of the outer surface of the sliding connecting rod (47);

the middle end of the outer surface of the sliding bolt (410) penetrates through the middle lower ends of the left side and the right side of the connecting block (49) and is in sliding connection with the middle lower ends of the left side and the right side of the connecting block (49), and the right end of the outer surface of the sliding bolt (410) is in sliding connection with the inner side surface of a hole at the upper end of the left side of the limit rectangular groove block (42) close to the left side of the scraper (44);

the inner side surfaces of the holes at the middle ends of the left side and the right side of the limiting ring (411) are fixedly connected with the right end of the outer surface of the sliding bolt (410);

the front end and the rear end of the left side and the right side of the bottom of the groove supporting plate (41) are fixedly connected with the top of the limiting supporting column (31).

9. The precise positioning device for a screen printing plate according to claim 1, wherein: the fixing mechanism (3) is arranged in a bilateral symmetry way by taking the central axis of the bottom plate (1) as a symmetry axis, and the inner side surfaces of the grooves on the front side and the rear side of the inner side of the grooves on the left side and the right side of the top of the limit supporting column (31) in the fixing mechanism (3) are in sliding connection with the outer side surfaces of the protruding blocks on the front side and the rear side of the sliding block (311) in the fixing mechanism (3).