CN215096303U - Screen frame guide rail positioning system suitable for treadmill printing machine - Google Patents

Abstract

An object of the utility model is to provide a screen frame positioning system suitable for run platform calico printing machine, because placing of raw materials product uses the guide rail as the benchmark of stamp location, and in the in-service use process, owing to receive machining precision and run the influence of collision impact between platform calico printing machine and the guide rail, there is unsmooth undulation guide rail self is used for the inside wall face with the screen frame laminating, this can't ensure when will leading to the screen frame to remove between each stamp station closely to laminate with the guide rail, make the screen frame take place to rock when scraping the seal and lead to the stamp quality to descend. In this scheme the screen frame positioning system make the screen frame all can closely laminate the location with the guide rail at each station through a locating component who has the spring, absorb simultaneously and lean on produced collision impact when leaning on, improve calico printing machine equipment job stabilization nature and durability.

Description

Screen frame guide rail positioning system suitable for treadmill printing machine

Technical Field

The utility model relates to a race platform calico printing machine equipment field specifically is a screen frame guide rail positioning system suitable for race platform calico printing machine.

Background

The silk screen printing has beautiful color and bright color, can also make different three-dimensional effects, is suitable for plane printing of various materials, has extremely wide application range, and is incomparable with other plane printing modes because of the uniqueness of the silk screen printing, so the silk screen printing mode is continuously developed to the present. The silk screen printing is performed by taking a silk screen arranged on a printing machine as a plate base and utilizing the basic principle that meshes of image-text parts of a silk screen printing plate can be permeated by dye and meshes of non-image-text parts can not be permeated by dye; when in printing, dye is poured into one end of the screen printing plate, a scraper plate is used for applying certain pressure to the dye position on the screen printing plate, meanwhile, the scraper plate moves towards the other end of the screen printing plate at a constant speed, and the dye is extruded onto a printing stock from meshes of the image-text part by the scraper plate during moving, so that the printing process is completed. As a small part of the conventional industry, the screen printing process originally relies on manpower printing completely, and there are many unstable factors such as unstable continuous printing effect and quality, increasing manpower cost, and limited production scale. With the continuous development of science and technology, people invent and create a treadmill printing machine which can not only ensure the printing quality, but also can continuously and efficiently work.

The treadmill printing machine, also called as a platen printing machine or a walking printing machine, is controlled by a computer system to move along a guide rail and sequentially print a plurality of products arranged along the guide rail. However, in the actual use process, how to control and position the position of the printing machine so as to match and correspond to the position of a required printed product is a key for improving the quality of the printed product of the product and is also a problem which needs to be solved urgently in the field of the treadmill printing machine.

The invention discloses a running platform plane printing machine as disclosed in the patent document with the authorization number of CN103331994B, which comprises a running platform frame, wherein two sides of the running platform frame are respectively provided with a traveling device, a running platform station positioning device is arranged between the running platform frame and two guide rails, a cutter frame is arranged in the running platform frame, the inner side of the cutter frame is rotatably provided with a screen frame, a screen frame positioning device is arranged between the screen frame and the guide rails, a scraper device driven by a scraper driving device is arranged on the cutter frame in a sliding manner, and two sides of the running platform frame are respectively provided with a lifting device used for driving the screen frame and the scraper device to lift or descend; the signal output end of the running station positioning device is electrically connected with the signal processing unit, and the signal output end of the signal processing unit is electrically connected with the signal input ends of the walking device, the lifting device and the scraper driving device respectively. The treadmill flat printing machine also comprises a screen frame positioning device, wherein the screen frame positioning device comprises a plurality of screen frame positioning plates fixedly arranged on one guide rail of the working platform, and the screen frame positioning plates are provided with positioning grooves with upward openings; the screen frame positioning shaft sleeves are fixedly arranged on the other guide rail of the working platform and are vertically arranged; the positions of the screen frame positioning plate and the screen frame positioning shaft sleeve correspond to each other; a positioning rod is fixedly arranged at one end of the screen frame of the flat screen printing machine of the running platform, which is consistent with the screen frame positioning plate; a positioning pin is fixedly arranged at one end of the screen frame, which is consistent with the screen frame positioning shaft sleeve; the positioning rod and the positioning groove, and the positioning pin and the screen frame positioning shaft sleeve can be inserted or separated simultaneously. After the positioning mode combining the rod-groove matching and the hole-shaft matching is adopted, the positioning precision of the screen frame at each station is ensured, and the printing or color register accuracy of the treadmill flat screen printing machine is improved. However, the treadmill flat printing machine positions the screen frame in a rod-groove matching and hole-shaft matching manner, and the requirement on the matching precision between the guide rail and the positioning component is high, which may cause the production and processing cost to be increased, and may cause the inconvenience in adjusting the sizes and specifications of different products; in the continuous operation use of calico printing machine, can't continuously realize accurate location for the guide rail, the condition that leads to the calico printing machine to take place the screen frame when walking between a plurality of printing stations and shift, and then leads to appearing the defective goods probability and increasing and reduce the stamp quality, the condition that leads to running platform calico printing machine unable normal work even appears.

SUMMERY OF THE UTILITY MODEL

The utility model provides a simple structure makes conveniently, can realize the screen frame positioning system who is applicable to running platform calico printing machine of stamp screen frame accurate positioning, screen frame positioning system has effectively guaranteed that the screen frame carries out the stability of removal process between different stations, has also reduced the collision impact effect between each part simultaneously, has prolonged the life of running platform calico printing equipment.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a screen frame guide rail positioning system suitable for treadmill calico printing machine, includes the guide rail that extends along the X axle direction and is used for placing the net frame of screen frame, be formed with on the net frame and be used for the bearing part of laminating contact mutually with the net frame bottom surface, its characterized in that: the screen frame can reciprocate along the Y-axis direction on the screen frame, and the screen frame comprises a first positioning component which can be used for abutting against one side of the screen frame to enable the other side of the screen frame to abut against the inner side wall surface of the guide rail.

As right the utility model discloses a preferably, include in the first positioning element and follow Y axle direction reciprocating motion's first activity butt portion be provided with first damping spring part that resets between the main part of first activity butt portion and net frame.

As right the utility model discloses a preferred, the screen frame leans on guide rail one side to be provided with and is used for directly to lean on the first cooperation subassembly of laminating with the counterbalance of guide rail inside wall face.

As right the utility model discloses a preferred, include in the first activity butt and lean on the laminating and can carry out the rotation of gyration around vertical direction the central axis with the direct counterbalance of screen frame and support and lean on the piece, it is cylindrical to support to lean on the piece to rotate.

As right the utility model discloses a preferred, the both sides direction symmetry between first activity butt portion and the net frame main part is provided with a plurality of first damping spring parts that reset, and the both ends of first damping spring part that reset respectively with first activity butt portion and net frame fixed connection.

Preferably, the first positioning members are arranged in a plurality of groups on a horizontal plane along the extending direction of the guide rail.

As right the utility model discloses a preferably, still include among this positioning system and lean on the upper surface of net frame to lean on to the spacing subassembly that beats takes place for the net frame in vertical Z axle direction with the restriction net frame.

As right the utility model discloses a preferred, contain a gyration gyro wheel in the spacing subassembly, the lateral surface of gyration gyro wheel offsets with the upper surface of screen frame and leans on the laminating.

As right the utility model discloses a preferred, first cooperation subassembly adopts integrated into one piece with the screen frame.

Preferably, the first fitting component is arranged in a left-right symmetrical manner relative to the net frame.

To sum up, the utility model discloses following a plurality of beneficial effect can be realized:

1. the positioning system is suitable for a treadmill printing machine with the lifting and descending motion tracks of the screen frame forming a certain included angle with the vertical direction in a YZ plane; when the calico printing machine marchd to a station, the screen frame of calico printing machine is close to and leans on the laminating to realize the screen frame along the axial location of Y to the guide rail when driving the screen frame decline to be close to raw materials products, positioning system can guarantee to run the screen frame of platform calico printing machine when location each time homoenergetic and guide rail inside wall face closely laminate the location, guarantees the quality of printing product.

2. In this scheme first positioning subassembly in contain first activity butt portion and connect the first damping spring part that resets between first activity butt portion and screen frame, first damping spring part that resets can effectively cushion the screen frame and lie in that the guide rail inside wall face supports to support to strike by the produced collision when laminating, promotes calico printing machine equipment's stability and durability, has also reduced the produced noise of during operation.

3. In the scheme, the screen frame contained in the positioning system of the treadmill printing machine is provided with a first matching component which is directly abutted against the inner side surface of the guide rail and is attached to the inner side surface of the guide rail, so that the stability of the screen frame when the screen frame is attached to the inner side surface of the guide rail is ensured.

4. In this scheme first activity butt include in the portion include one be used for advancing to lean on the cylindrical rotation of laminating to lean on the piece with the screen frame, rotate to lean on the piece can revolve around the central axis of vertical direction, do not influence its removal process along the X axle direction when carrying out the location to the screen frame along the Y axial.

5. The screen frame positioning system in the scheme further comprises a limiting assembly capable of abutting against and limiting the upper surface of the screen frame, and the screen frame is likely to be attached to the guide rail and still in the descending process when being printed, so that the screen frame can jump or turn over due to the influence of the vertically upward friction acting force of the contact position; through setting up spacing subassembly through leaning on to the screen frame upper surface, can effectively avoid the emergence of this condition, further promote screen frame positioning system's job stabilization nature.

6. In this scheme spacing subassembly in contain and set up a gyration gyro wheel that the direction of gyration central axis is certain contained angle slope for vertical direction, the gyration gyro wheel can rotate when the net frame removes along the Y axle direction, reduces the resistance that the net frame received when the removal location when guaranteeing to realize vertical direction location to the net frame.

7. First locating component and first cooperation subassembly in this scheme be bilateral symmetry's form for the printing screen frame and arrange for the screen frame leans on when fixing a position more steadily leaning on, alleviates to scrape produced rocking in the seal in-process in order to obtain more exquisite printing pattern and higher quality stamp product.

Drawings

FIG. 1 is a schematic diagram showing the positional relationship of various main components in a frame rail positioning system;

FIG. 2 is a schematic view of the positional relationship between the frame rail positioning system and the gantry rail;

FIG. 3 is an enlarged view of a partial structure of the first positioning assembly;

FIG. 4 is a partially enlarged view of the structural relationship between the second positioning assembly and the second mating assembly;

FIG. 5 is a partially enlarged view of the structural relationship between the second positioning assembly and the frame;

fig. 6 is a simplified schematic diagram of the internal structure of the second positioning assembly.

In the figure:

1-guide rail, 1 a-positioning column;

2-net frame, 2 a-bearing part;

3-screen frame;

4-a second positioning component, 4 a-a fixed part, 4 b-a movable part, 4 c-a second damping return spring part, 4 d-a limiting component, 4 e-a rotary roller;

5-second mating component;

6-a first positioning component, 6 a-a first movable abutting part, 6 b-a first damping return spring part;

7-first mating component;

8-rotating the abutment.

Detailed Description

The following specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws and protection within the scope of the present invention.

The scheme is realized by the following technical means:

example (b): a screen frame guide rail positioning system suitable for a treadmill printing machine comprises a guide rail 1 which is arranged on a rack and extends along the X-axis direction to guide the treadmill printing machine to walk. The upper surface of guide rail 1 upwards the arch form a plurality of and be columniform reference column 1a, and each reference column 1a arranges and certain the same distance of interval between two adjacent reference columns 1a along the extending direction of guide rail 1, reference column 1a is fixed no longer removes in the installation of X axle orientation. The running system of the treadmill printing machine is fixedly installed with the guide rail 1 in a matched manner through the roller assemblies clamped on two sides of the guide rail 1, and the printing machine is driven by the driving wheels to move on the surface of the rack along the guide rail 1. The movable mounting has a screen frame 2 that is used for placing screen frame 3 on the treadmill calico printing machine, is formed with the portion of bearing 2a that is used for supporting screen frame 3 to the evagination on the screen frame 2, screen frame 2 can be at vertical direction be Z axle direction go on reciprocating motion and realize being located being close to between screen frame 3 and the required product of printing of screen frame 2 and laminating or the separation process. A second positioning component 4 is arranged on the rear side surface of the screen frame 2 in the advancing direction of the printing machine, the second positioning component 4 comprises a fixed part 4a arranged on the screen frame 2 and a movable part 4b which is connected with the fixed part 4a and is used for directly abutting against and adhering with the screen frame 3, and the movable part 4b is inserted into the fixed part 4a and can reciprocate relative to the fixed part 4a along the X-axis direction; a second damping return spring 4c is further installed between the movable part 4b and the fixed part 4a, and two ends of the spring are respectively abutted against and attached to the movable part 4b and the fixed part 4 a. When the screen frame 3 enters a printing station, a part of descending process is completed along with the screen frame 2, and then the screen frame moves towards the positioning column 1a along the X-axis direction; support when the portion of supporting of screen frame 3 and reference column 1a and support the laminating completely and no longer remove along the X axle direction after, screen frame 2 still can continue to follow the calico printing machine and move the certain distance forward, screen frame 3 can not take place to remove but produce the displacement for screen frame 2 along the X axis direction for guide rail 1 this moment, fixed part 4a and movable part 4b among the second locating component 4 move mutually and are close to, second damping spring part 4c that resets between the two plays effectual buffering damping effect to the collision between screen frame 3 and reference column 1a simultaneously, greatly reduced the impact effect, the vibration and the noise that the collision sent when having alleviateed equipment operation work have also prolonged the life of equipment.

Further preferably, the screen frame 2 can be controlled to move along the Z-axis direction and the X-axis direction simultaneously, so that the screen frame 3 moves along an oblique track integrally, the time required by positioning the screen frame 3 is further shortened, and the working efficiency of the printing machine is improved. However, in this process, it is necessary to ensure that the screen frame 3 does not move in the horizontal direction when being attached to the surface of the product, so as to avoid the occurrence of rubbing damage to the printed pattern.

Specifically, printing screen frame 3 is formed with outside bellied portion of leaning on and is used for leaning on the laminating location with reference column 1a, still be formed with on screen frame 2 be used for with second locating component 4 plays clamping action's second cooperation subassembly 5 jointly to screen frame 3. When running a platform calico printing machine and need walking to remove to next stamp station, net frame 2 drives the reverse motion of net frame 3 along the location orbit, the portion of supporting on the net frame 3 at this moment separates from each other with reference column 1a, reference column 1a no longer plays limiting displacement to net frame 3, under the produced elastic force of second damping spring part 4c, movable part 4b promotes net frame 3 and removes until leaning on with the counterbalance of second cooperation subassembly 5 to the opposite side, it is spacing to net frame 3 once more through second cooperation subassembly 5. This structure has effectively avoided the screen frame 3 to take place to rock when the calico printing machine removes between two stations, also can prevent simultaneously that screen frame 3 from moving the distance too big to one side under the spring action, has shortened the calico printing machine and has laminated the required time of location again with reference column 1a after removing to next station, has further improved the work efficiency who runs a calico printing machine.

In the work process of the conventional type of treadmill printing machine, the working mode of relying on the walking positioning of the internal program control printing machine to ensure the position of the screen frame 3 exists, the vision processing or sensing system capable of identifying the position of a raw material product needs to be additionally installed on the treadmill printing machine, the production and manufacturing cost of the treadmill printing machine can be improved, in addition, the positioning mode is lower in reliability compared with a mechanical positioning mode, the influence of external interference factors is extremely easy to be influenced, the positioning position error in the actual work process is also easy to be amplified by the long-time continuous use process, and the condition that the printing positions of a large number of products deviate from the designed positions and even the proportion of defective products is increased is caused. Consequently in the 3 positioning system's of screen frame that adopt in this scheme stamp working process, after screen frame 3 moves down and is close to the laminating with the raw materials product, run platform calico printing machine and make the complete machine continue to move one end distance forward under the control of the inside walking procedure that moves, make the portion of leaning on the screen frame 3 and reference column 1a location of laminating each other to the mode of leaning on the contact ensures that the position of reference column 1a is as the raw materials product and places the only benchmark of position and 3 positioning positions of screen frame, realizes that screen frame 3 position and raw materials product position are more simply high-efficiently corresponding the matching.

Because when the in-process of the printing work of running platform calico printing machine, accomplish the stamp process to the raw materials product on the station after, net frame 2 drives earlier that screen frame 3 upwards lifts and separates and move to next station along with calico printing machine with reference column 1a, when calico printing machine drives screen frame 3 and moves to next station department of placing the raw materials product, net frame 2 makes screen frame 3 and another reference column 1a support again and leans on the location of laminating completion X axle direction along the movement track reverse stroke descending movement. However, in this process, the screen frame 3 may shake relative to the screen frame 2 along the Y-axis direction or the guide rail 1 may undulate in the Y-axis direction when extending, so that the accurate positioning of the screen frame 3 in the Y-axis direction cannot be ensured, and the quality of the printed product may be reduced.

Therefore, a first positioning component 6 for ensuring that the printing screen frame 3 is attached to the inner side surface of the guide rail 1 in the Y-axis direction so as to accurately position the screen frame 3 in the Y-axis direction is further arranged on the screen frame 2. The first positioning assembly 6 comprises a first movable abutting part 6a which can reciprocate relative to the net frame 2 along the Y-axis direction on a plane and is directly abutted against and contacted with the net frame 3, a first vibration reduction reset spring part 6b connected between the first movable abutting part 6a and the net frame 2 is installed in the first positioning assembly 6, and two end parts of the first vibration reduction reset spring part 6b are respectively fixedly connected with the first movable abutting part 6a and the net frame 2. In the actual work process of the screen frame 2 of the printing machine, the screen frame 3 is moved along the Y axis direction by increasing the screen frame 3 in the movement track, so that the screen frame 3 abuts against the inner side surface of the guide rail 1 to perform scraping and printing after being attached and positioned in the process that the screen frame 3 is positioned by the first matching component 7 protruding outwards and formed on one side of the guide rail 1 every time, and the stability of the screen frame 3 when the scraper performs scraping and printing is ensured at the positioning of the screen frame 3 in the Y axis direction. Under the effect of first damping spring part 6b that resets, the screen frame 3 all is fixed spacingly by first positioning component 6 and guide rail 1 when each station carries out the seal, and can alleviate excessive impact effect of colliding through the elastic deformation effect of first damping spring part 6b again between screen frame 3 and the guide rail 1, has alleviateed the produced influence of other adapting unit and the noise that sends.

Further preferably, run and still include one kind in the this scheme run the platform calico printing machine and can lean on spacing subassembly 4d to the screen frame 3 on vertical direction. After the printing process on one station is finished by the treadmill printing machine, the screen frame 3 is lifted upwards by the screen frame 2 under the condition that the screen frame 3 is still contacted and attached with the positioning column 1a, at the moment, an acting force along the vertical direction is generated by the contact position, and the action position of the acting force cannot be ensured to act on the center of the screen frame 3, so that the printing screen frame 3 has the tendency of overturning or jumping in the process; similarly, when the screen frame 3 still moves along the vertical direction under the condition that the first matching component 7 is attached to the guide rail 1, the screen frame 3 also generates irregular jumping; at this moment, the limiting component 4d can generate an abutting acting force on the net frame 3 in the vertical direction, so that the shaking is reduced, and the synchronism of the net frame 3 moving along with the net frame 2 is improved.

Example 2: on the basis of embodiment 1, integrate spacing subassembly 4d and second locating component 4 for contain the gyration gyro wheel 4e that a rotation central axis is certain angle for vertical direction in the second locating component 4, the convex curved surface of indent or evagination is personally submitted to the outside of this gyration gyro wheel 4e, and the convex curved surface of evagination or indent is personally submitted to the outside that screen frame 3 is used for leaning on the laminating with gyration gyro wheel 4e lateral surface. The rotary roller 4e can provide the net frame 3 with the abutting acting force horizontally along the X-axis direction and vertically along the Z-axis direction. Simultaneously, when the screen frame 3 removed along the Y axle direction, the rotation of gyration gyro wheel 4e structure through self can effectively reduce the frictional resistance when the screen frame 3 removed for the location process is more high-efficient, and the holistic integrated nature of running platform calico printing machine equipment is higher.

Further preferably, the first matching component 7 and the screen frame 3 are manufactured by integrally forming metal materials, and the first matching component 7 is fixedly arranged on the wall surface of one side, close to the guide rail, of the screen frame 3 in a bilateral symmetry mode, so that the screen frame 3 is abutted to the guide rail in a surface contact mode, and the stability of the screen frame 3 in positioning and scraping printing is further improved.

Further preferably, be provided with two sets of adjacent first locating component 6 along guide rail 1 extending direction on net frame 2, each group all includes two first damping spring part 6b that reset that bilateral symmetry set up and two first damping spring part 6b that reset mutually the slant arrange into a "splayed" in the first locating component 6 of each group, first damping spring part 6b that reset under this structure setting can play buffering damping effect to the impact effect of X axial and Y axial collision simultaneously, further improved positioning system's stability. A cylindrical rotary abutting member 8 capable of rotating around a vertical central axis is movably mounted on the first movable abutting portion 6a of the first positioning member 6. Two rotations lean on piece 8 simultaneously with the preceding terminal surface counterbalance of keeping away from guide rail one side of net frame 3 lean on the laminating, make the rear end face of net frame 3 lean on the laminating through the medial surface of first cooperation subassembly 7 with guide rail 1 under the effect of first damping spring part 6b that resets, realize the fixed to net frame 3. Because the screen frame 3 is leaned on the locking back by reference column 1a in the X axial, screen frame 2 still has the trend of moving forward, screen frame 3 takes place to remove along the X axial for screen frame 2, rotate 8 in the rotation piece of terminal surface before screen frame 3 this moment, when guaranteeing to lean on the effect to screen frame 3 along the Y axial, the resistance that receives when having reduced screen frame 3 along X axial displacement, the required time of 3 location of screen frame has been shortened, the work efficiency of running a platform calico printing machine is promoted.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a screen frame guide rail positioning system suitable for treadmill calico printing machine, includes guide rail (1) that extend along the X axle direction and is used for placing screen frame (3) net frame (2), be formed with on net frame (2) and be used for bearing portion (2 a) of laminating contact mutually with screen frame (3) bottom surface, its characterized in that: the utility model discloses a screen frame, including screen frame (2), screen frame (3) can be on screen frame (2) along Y axle direction reciprocating motion, include on screen frame (2) and be used for leaning on first locating component (6) that the opposite side that leans on the laminating of opposite side and guide rail (1) inside wall face that leans on of leaning on screen frame (3) one side messenger screen frame (3).

2. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 1, wherein: the first positioning assembly (6) comprises a first movable abutting part (6a) capable of reciprocating along the Y-axis direction, and a first vibration reduction return spring part (6b) is arranged between the first movable abutting part (6a) and the main body of the net frame (2).

3. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 1, wherein: one side of the screen frame (3) close to the guide rail (1) is provided with a first matching component (7) which is directly abutted against and attached to the inner side wall surface of the guide rail (1).

4. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 2, wherein: the first movable abutting part (6a) comprises a rotating abutting part (8) which is directly abutted against and attached to the net frame (3) and can rotate around the central axis in the vertical direction, and the rotating abutting part (8) is cylindrical.

5. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 2, wherein: a plurality of first damping reset spring parts (6b) are symmetrically arranged between the first movable abutting part (6a) and the net frame (2) body in the left-right direction, and two ends of each first damping reset spring part (6b) are fixedly connected with the first movable abutting part (6a) and the net frame (2) respectively.

6. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 1, wherein: and a plurality of groups of first positioning assemblies (6) are arranged on the horizontal plane along the extension direction of the guide rail (1).

7. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 1, wherein: the positioning system also comprises a limiting component (4 d) which can abut against the upper surface of the net frame (3) to limit the net frame (3) to jump relative to the net frame (2) in the vertical Z-axis direction.

8. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 7, wherein: the limiting assembly (4 d) comprises a rotary roller (4 e), and the outer side surface of the rotary roller (4 e) is abutted against and attached to the upper surface of the screen frame (3).

9. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 3, wherein: the first matching component (7) and the net frame (3) are manufactured in an integrated mode.

10. The screen frame guide positioning system suitable for the treadmill printing machine as recited in claim 3, wherein: the first matching components (7) are arranged in a left-right symmetrical mode relative to the net frame (3).

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