A positioning mechanism for a screen printing frame of a screen printing machine

Abstract

The present invention discloses a positioning mechanism for a screen printing frame of a screen printing machine, which relates to the technical field of screen printing machines and includes a screen printing machine body, and a feeding conveyor and a coiling conveyor fixedly mounted on the left and right ends of the screen printing machine body, wherein the feeding conveyor and the coiling conveyor are used to continuously transport the fabric for screen printing; the screen printing mechanism is also provided on the right side of the top of the screen printing machine body, and a feeding screen printing frame is provided below the middle of the front face of the lifting horizontal plate; a positioning mechanism is fixedly mounted on the top surface of the screen printing machine body, and a positioning support plate is used to lift the fabric to define the screen printing area. The positioning mechanism of the screen printing frame of the screen printing machine is to lower the feeding screen printing frame and the printing screen plate, and then the positioning support plate is linked to drive the fabric to rise synchronously and tighten to define the area required for screen printing, and the front and rear correction flip plates and the adjustable contact strips are used to position the sides of the fabric of different specifications so that the fabric and the screen printing frame fit each other to avoid deviation.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing machines, in particular to a positioning mechanism for a screen printing frame of a screen printing machine. Background Art

[0002] A screen printer, also known as a silk screen printer, is a device that uses a screen printing plate for printing, employing a stencil printing process. Its core principle is to use a scraper to squeeze ink through the image portion (mesh) of the screen printing plate and onto the substrate (such as paper, plastic, metal, or fabric), forming a pattern or text. To meet different printing requirements, the desired pattern is printed by replacing the screen frame with a different pattern. The printed material (such as fabric or porcelain) must be aligned with the screen frame to prevent misalignment of the printed pattern, which could affect aesthetics and printing quality.

[0003] The utility model with announcement number CN214563684U discloses a screen printing machine that fixes the scraper by magnetic attraction. When installing the scraper, there is no need to clamp it with a clamping plate and then fix it with multiple screws. It can be directly fixed by adsorption. When the scraper needs to be replaced, the scraper can be removed by simply overcoming the magnetic force of the iron plate. The installation and disassembly are quick and convenient, which improves work efficiency.

[0004] The utility model with announcement number CN219236481U discloses a screen frame for a photovoltaic screen printing machine. The screen frame is installed on the work station by replacing traditional fixing screws with four positioning balls, preventing the screws from loosening when the equipment is working for a long time, causing the screen frame to shake and affecting the printing quality. A two-stage telescopic cylinder is also installed on the inner frame of the screen frame, so that the screen frame can adapt to a variety of different models of screen bodies to meet different printing needs.

[0005] However, the positioning and installation of the screen printing frame of the screen printing machine disclosed above still has the following problems during actual use: the screen printing frame and the screen printing mechanism are connected by bolts, but this type of connection drives the screen printing frame to descend and fit together with the printed product, but the printed product does not have the required calibration and positioning mechanism. Even if the screen printing frame can be ensured not to shift, the printed product below cannot be positioned in the area where it is located, and it will also be misaligned relative to the printing frame, especially continuous and uninterrupted fabrics are more prone to shifting.

[0006] Therefore, we propose a positioning mechanism for a screen printing frame of a screen printing machine to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a positioning mechanism for the screen printing frame of a screen printing machine, in order to solve the problem that the screen printing frame and the screen printing mechanism are connected by bolts in the existing method. However, this type of connection method drives the screen printing frame to descend and fit together with the printed product, but the printed product does not have the required calibration and positioning mechanism. Even if the screen printing frame can be guaranteed not to shift, the printed product below cannot be positioned in the area where it is located, and it will also be misaligned relative to the printing frame, especially the continuous and uninterrupted fabric is more prone to shifting.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a positioning mechanism for a screen printing frame of a screen printing machine, comprising a screen printing machine body, and a loading conveyor and a coiling conveyor fixedly mounted on the left and right ends of the screen printing machine body, wherein the loading conveyor and the coiling conveyor are used to continuously convey the fabric for screen printing;

[0009] The screen printing machine further comprises: a screen printing mechanism is provided on the right side of the top of the screen printing machine body, and the screen printing mechanism includes a driving bearing seat, and a lifting horizontal plate is slidably installed on the front of the driving bearing seat, and a feeding screen printing frame is provided below the middle of the front of the lifting horizontal plate;

[0010] A positioning mechanism is fixedly installed on the top surface of the screen printing machine body, and the positioning mechanism includes a positioning frame, and a positioning bearing plate is slidably installed on the right side of the top surface of the positioning frame. The positioning bearing plate is used to lift the cloth to limit the screen printing area.

[0011] Preferably, the screen printing mechanism includes an adjustable clamping arm, and the adjustable clamping arm is slidably installed on the left and right sides of the front of the lifting horizontal plate, and the bottom ends of the symmetrically arranged adjustable clamping arms can be detachably clamped and positioned to clamp the outer end of the feeding screen printing frame, and an ink scraper is slidably installed in the middle of the front of the lifting horizontal plate.

[0012] Preferably, the screen printing mechanism includes a printing screen plate, and the printing screen plate is detachably mounted at the inner center of the feeding screen printing frame, and printing slots are equidistantly provided inside the printing screen plate, and the printing slots are arranged according to the required pattern.

[0013] Preferably, the silk screen printing mechanism includes an ink storage area, and the ink storage area is located between the left and right ends of the printing screen plate and the printing slot hole. The ink storage area is fitted with a sliding ink scraper so that the ink scraper scrapes the ink to the printing slot hole and prints it downward on the surface of the fabric to form the desired pattern.

[0014] Preferably, the positioning mechanism includes a pressure cross plate, and the bottom end of the pressure cross plate slides through the front and rear sides of the interior of the positioning support plate, and the pressure cross plate and the positioning support plate are connected to each other through a resistance spring, and the front and rear ends of the positioning support plate are both provided with a correction flip plate that is rotated by a torsion spring, and at the same time, the inner wall of the symmetrically arranged correction flip plate and the bottom end of the positioning support plate are connected to each other through a traction steel cable.

[0015] Preferably, the positioning mechanism includes an adjustable interference strip, and the left and right sides of the outer ends of the adjustable interference strip are rotatably connected to the inner end of the pitch-adjusting screw through bearings, and the outer end threads of the symmetrically arranged pitch-adjusting screws pass through the upper end of the correction flip plate. The adjustable interference strip connected by the pitch-adjusting screw and the correction flip plate are adapted to fabrics of different widths to achieve correction.

[0016] Preferably, a calibration mechanism is provided on the bottom surface of the positioning supporting plate, and the calibration mechanism includes a calibration resistance block, and the calibration resistance block is fixedly installed on the front and rear sides of the middle part of the bottom surface of the positioning supporting plate, and the bottom surface of the symmetrically arranged calibration resistance block is slidably connected to the top surface of the sliding resistance block, and the contact surfaces of the correspondingly distributed calibration resistance blocks and the sliding resistance blocks are distributed in an inclined structure.

[0017] Preferably, the inner ends of the sliding resistance blocks included in the calibration mechanism are fixedly installed with guide racks, and the inner ends of the symmetrically arranged guide racks are meshed with guide gears, and the guide gears are rotatably installed on the inner bottom surface of the positioning frame, and the rear sliding resistance blocks slide through the outside of the positioning frame.

[0018] Preferably, the calibration mechanism includes a lifting liner, and the lifting liner is fixedly installed on the middle part of the back side of the feeding screen printing frame, and the bottom end of the lifting liner is slidably installed on the top surface of the sliding resistance block outside the positioning frame, and the rear sliding resistance block and the bottom end of the driving bearing seat are connected to each other through a reset spring. The lifting liner is driven down by the feeding screen printing frame, and after squeezing the sliding resistance block and the calibration resistance block, the positioning bearing plate drives the cloth to rise to realize the positioning of the screen printing area.

[0019] Preferably, after the feeding screen printing frame descends, it drives the positioning supporting plate and the surface fabric to rise synchronously, and after the fabric is stretched, the resistance pressure horizontal plate descends, so as to drive the front and rear correction flip plates and the adjustable resistance strips to rotate upward and resist the side of the fabric, thereby avoiding misalignment during the screen printing process and affecting the printing effect.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the positioning mechanism of the screen printing frame of the screen printing machine, through the lowering of the feeding screen printing frame and the printing screen plate, the linkage positioning carrier plate drives the fabric to rise synchronously and tighten to define the area required for screen printing, and the front and rear side correction flip plates and adjustable contact strips are used to position the side edges of fabrics of different specifications so that the fabric and the screen printing frame fit together to avoid deviation. The specific contents are as follows:

[0021] 1. The adjustable clamping arm is installed for the feeding screen printing frame. At the same time, the adjustable clamping arm is slidably installed on the left and right sides of the front of the lifting cross plate through the cylinder, so as to drive the bearing seat to drive the lifting cross plate and the feeding screen printing frame to move up and down during the screen printing process to perform screen printing operations. At the same time, the feeding conveyor and the coil conveyor drive the fabric to be printed to slide on the surface of the positioning carrier plate to achieve continuous and uninterrupted screen printing operations.

[0022] The printed screen plate is installed inside the feeding screen printing frame, and the ink scraper is set above the printed screen plate. The ink storage areas set on the left and right sides are used to store ink. The ink scraper is attached to the printed screen plate to scrape the ink, and the ink is printed on the surface of the fabric through the printing slots to avoid ink residue on the printed fabric affecting the molding effect.

[0023] 2. The lifting horizontal plate drives the screen printing frame and the lifting liner to descend, and the sliding resistance block squeezed and fitted at the bottom of the lifting liner slides, driving the guide rack to rotate the meshing guide gear, so that the guide rack in front drives the corresponding sliding resistance block to move synchronously, squeezing the calibration resistance block fitted on the top surface to drive the positioning bearing plate to slide upward, so that it tightens the fabric covered on the top surface to avoid fabric wrinkles and overlapping of the printed patterns.

[0024] 3. The tensioned fabric drives the pressure plate on the top of the positioning bearing plate to descend, so that the traction cable at the bottom of the pressure plate is tensioned, which drives the deviation-correcting flip plate fixed at the outer end and the adjustable contact strip to flip upward synchronously, thereby pressing and positioning the side of the fabric, and fitting it with the screen printing frame, thereby realizing the screen printing operation after positioning.

[0025] The adjustable friction strip connected to the deflection correction flip plate by an adjustable screw can adapt to fabrics of different widths. By rotating the adjustable screw, the adjustable friction strip changes the distance between the deflection correction flip plate and the adjustable friction strip, and then the position of the adjustable friction strip is adjusted to adapt to the side of the fabric for positioning, avoiding screen printing misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2This is a schematic diagram of the installation structure of the feeding screen printing frame and the printing screen plate of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the screen printing mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0030] Figure 5 This is a schematic diagram of the installation structure of the adjustable clamping arm and the ink scraper of the present invention;

[0031] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the calibration friction block and the sliding friction block of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the feeding screen printing frame after it descends;

[0034] Figure 9 For the present invention Figure 8 The enlarged structural diagram at C in the middle;

[0035] Figure 10 This is a schematic diagram of the structure of the deviation-correcting flip plate after rotation of the present invention.

[0036] In the figure: 1. Screen printing machine body; 2. Loading conveyor; 3. Coil conveyor; 4. Drive bearing seat; 5. Lifting cross plate; 6. Feeding screen frame; 7. Positioning frame; 8. Positioning bearing plate; 9. Lifting lining plate; 10. Adjustable clamping arm; 11. Ink scraper; 12. Printing screen plate; 13. Printing slot; 14. Ink storage area; 15. Pressure cross plate; 16. Resistance spring; 17. Correction flip plate; 18. Reset spring; 19. Traction rope; 20. Adjustable resistance bar; 21. Pitch adjustment screw; 22. Calibration resistance block; 23. Sliding resistance block; 24. Guide rack; 25. Guide gear. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] See also Figures 1-10 , the present invention provides the following technical solutions:

[0039] Example 1: In order to solve the problem of positioning the screen printing frame of the existing screen printing machine between the printed product, this embodiment discloses the following technical solution: a positioning mechanism for the screen printing frame of the screen printing machine, including a screen printing machine body 1, and a loading conveyor 2 and a roll conveyor 3 fixedly installed at the left and right ends of the screen printing machine body 1, and the loading conveyor 2 and the roll conveyor 3 are used to continuously transport the cloth for screen printing; a positioning mechanism is fixedly installed on the top surface of the screen printing machine body 1, and the positioning mechanism includes a positioning frame 7, and a positioning support plate 8 is slidably installed on the right side of the top surface of the positioning frame 7, and the positioning support plate 8 is used to lift the cloth to limit the screen printing area.

[0040] like Figure 1-Figure 2 As shown, the screen printing machine body 1 rolls up the fabric to be printed for storage through the loading conveyor 2 at the left end, and stretches the outer end of the fabric roll to the positioning supporting plate 8 on the top surface of the positioning frame 7. At the same time, the outer end of the fabric roll is wound around the outer wall of the roll conveyor 3. The rotation of the loading conveyor 2 and the roll conveyor 3 drives the required printed fabric to be transported from left to right, while ensuring the tension of the printed fabric during the transportation process to avoid wrinkles that affect the printing effect. At the same time, the fabric to be printed is covered above the positioning supporting plate 8 on the right side of the positioning frame 7, and the pressure cross plates 15 on the front and rear sides above the positioning supporting plate 8 are covered, so as to limit the required printing area on the fabric surface through the positioning supporting plate 8 to reduce the deviation during the printing process.

[0041] Example 2: In order to solve the problem of positioning the screen printing frame of the existing screen printing machine between the printed product, this embodiment discloses the following technical solution: a screen printing mechanism is provided on the right side of the top of the screen printing machine body 1, and the screen printing mechanism includes a driving support seat 4, and a lifting horizontal plate 5 is slidably installed on the front of the driving support seat 4, and a feeding screen printing frame 6 is provided at the lower middle part of the front of the lifting horizontal plate 5; the screen printing mechanism includes an adjustable clamping arm 10, and the adjustable clamping arm 10 is slidably installed on the left and right sides of the front of the lifting horizontal plate 5, and the bottom end of the symmetrically arranged adjustable clamping arm 10 can detachably clamp and position the outer end of the feeding screen printing frame 6, and an ink scraper 11 is slidably installed on the middle part of the front of the lifting horizontal plate 5.

[0042] The silk screen printing mechanism includes a printing screen plate 12, and the printing screen plate 12 is detachably installed at the internal center position of the feeding silk screen frame 6, and printing slots 13 are opened at equal distances inside the printing screen plate 12, and the printing slots 13 are opened and arranged according to the required pattern; the silk screen printing mechanism includes an ink storage area 14, and the ink storage area 14 is located between the left and right ends of the printing screen plate 12 and the printing slots 13, and the ink storage area 14 is fitted with a sliding ink scraper 11 so that the ink scraper 11 scrapes the ink to the printing slots 13 and prints it downward on the surface of the fabric to form the required pattern.

[0043] like Figure 3 、 Figure 5 As shown, the driving bearing seat 4 installed on the top surface of the screen printing machine body 1 is installed for the lifting horizontal plate 5, and can drive the lifting horizontal plate 5 to move up and down through the cylinder assembly according to the required printing requirements. At the same time, the adjustable clamping arm 10 is slidably installed on the left and right sides of the front of the lifting horizontal plate 5 through the cylinder assembly, so that it can be installed for the feeding screen printing frame 6 through the adjustable clamping arm 10, adapting to feeding screen printing frames 6 of different specifications while driving them to move up and down and fit together with the fabric to be printed to realize the screen printing operation.

[0044] Furthermore, the printing screen plate 12 is installed inside the feeding screen printing frame 6, and the ink scraper 11 in the middle of the front of the lifting horizontal plate 5 is located above the printing screen plate 12. The printing slots 13 opened inside the printing screen plate 12 allow the ink to penetrate downward onto the fabric to form a pattern. At the same time, the ink storage areas 14 on both sides of the printing screen plate 12 store the ink so that the ink scraper 11 can be attached to the printing screen plate 12 to drive the ink to be scraped in the left and right directions, thereby avoiding ink residue on the printed fabric and affecting the molding effect.

[0045] Example 3: In order to solve the problem of positioning the screen printing frame of the existing screen printing machine between the printed product, this embodiment discloses the following technical solution: a calibration mechanism is provided on the bottom surface of the positioning carrier plate 8, and the calibration mechanism includes a calibration resistance block 22, and the calibration resistance block 22 is fixedly installed on the front and rear sides of the middle part of the bottom surface of the positioning carrier plate 8, and the bottom surface of the symmetrically arranged calibration resistance block 22 is slidably connected to the top surface of the sliding resistance block 23, and the contact surfaces of the correspondingly distributed calibration resistance blocks 22 and the sliding resistance blocks 23 are distributed in an inclined structure.

[0046] The inner ends of the sliding resistance blocks 23 included in the calibration mechanism are fixedly installed with guide racks 24, and the inner ends of the symmetrically arranged guide racks 24 are meshed with guide gears 25, and the guide gears 25 are rotatably installed on the inner bottom surface of the positioning frame 7, and the rear sliding resistance block 23 slides through the outside of the positioning frame 7; the calibration mechanism includes a lifting lining plate 9, and the lifting lining plate 9 is fixedly installed on the middle part of the back side of the feeding screen printing frame 6, and the bottom end of the lifting lining plate 9 is slidably installed on the top surface of the sliding resistance block 23 outside the positioning frame 7, and the rear sliding resistance block 23 and the bottom end of the driving bearing seat 4 are connected to each other through a return spring 18, and the lifting lining plate 9 is driven down by the feeding screen printing frame 6, and after squeezing the sliding resistance block 23 and the calibration resistance block 22, the positioning bearing plate 8 drives the cloth to rise to realize the positioning of the screen printing area.

[0047] like Figure 4 、 Figure 7 、 Figure 10As shown, during the process of printing on the cloth, the lifting horizontal plate 5 drives the feeding screen printing frame 6 and the lifting lining plate 9 to descend synchronously, and the bottom end of the lifting lining plate 9 is in a sloped structure to squeeze the sliding resistance block 23 at the rear to slide toward the inside of the positioning frame 7, and at the same time, it drives the front guide rack 24 to engage the guide gear 25 to rotate, so that the front guide rack 24 drives the corresponding sliding resistance block 23 to slide backward, so that the sliding resistance blocks 23 on the front and rear sides slide in opposite directions through the calibration resistance block 22 that is squeezed and fitted by the slope, so that when the calibration resistance block 22 rises, it drives the positioning support plate 8 to move synchronously, so that the positioning support plate 8 can tension the cloth covered on the top surface, help flatten the folds, and avoid pattern overlap during the silk screen printing process.

[0048] Example 4: In order to solve the problem of positioning the screen printing frame of the existing screen printing machine between the printed product, this embodiment discloses the following technical solution, the positioning mechanism includes a pressure cross plate 15, and the bottom end of the pressure cross plate 15 slides through the front and rear sides of the interior of the positioning carrier plate 8, and the pressure cross plate 15 and the positioning carrier plate 8 are connected to each other through a resistance spring 16, and the front and rear ends of the positioning carrier plate 8 are both provided with a correction flip plate 17 through a torsion spring rotation, and at the same time, the inner wall of the symmetrically arranged correction flip plate 17 and the bottom end of the positioning carrier plate 8 are connected to each other through a traction steel cable 19.

[0049] The positioning mechanism includes an adjustable friction strip 20, and the left and right outer ends of the adjustable friction strip 20 are rotatably connected to the inner ends of the pitch-adjusting screws 21 through bearings, and the outer end threads of the symmetrically arranged pitch-adjusting screws 21 pass through the upper end of the correcting flip plate 17. The adjustable friction strip 20 and the correcting flip plate 17 connected by the pitch-adjusting screws 21 adapt to fabrics of different widths to achieve correction; after the feeding screen printing frame 6 descends, it drives the positioning bearing plate 8 and the fabric on the surface to rise synchronously, and after the fabric is tensioned and stretched, the friction pressure cross plate 15 descends, so as to drive the front and rear sides of the correcting flip plates 17 and the adjustable friction strip 20 to rotate upward and contact the side edges of the fabric, thereby avoiding dislocation during the screen printing process that affects the printing effect.

[0050] like Figure 6 、 Figure 8-Figure 9 As shown, in the process of the positioning carrier plate 8 rising to tension the fabric, the fabric presses the pressure cross plates 15 on the front and rear sides of the top of the positioning carrier plate 8 to slide downward synchronously, so that the pressure cross plates 15 tension the traction steel cable 19 fixedly connected to the bottom end, and the traction steel cable 19 drives the deviation correction flip plate 17 fixedly connected to the outer end to flip upward, and at the same time drives the adjustable contact strip 20 connected to the top end by the pitch adjusting screw 21 to rotate, so that the adjustable contact strip 20 is pressed against the front and rear sides of the fabric, thereby positioning the fabric, and at the same time, the positioning carrier plate 8 and the feeding screen printing frame 6 are fitted together, so that the printing screen plate 12 is pressed against the surface of the fabric, and ink scraping printing is achieved through the ink scraper 11.

[0051] Furthermore, during the positioning process of fabrics of different specifications, the distance-adjusting screws 21 on the left and right sides of the top of the deflection-correcting flip plate 17 are manually rotated, so that the distance-adjusting screws 21 drive the adjustable interference strip 20 connected to the inner end to move, thereby changing the distance between the adjustable interference strip 20 and the deflection-correcting flip plate 17, so as to position the side edges of fabrics of different widths and avoid misalignment during the silk-screen printing process.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A positioning mechanism for a screen printing frame of a screen printing machine, comprising a screen printing machine body (1), and a loading conveyor (2) and a coiling conveyor (3) fixedly mounted on the left and right ends of the screen printing machine body (1), wherein the loading conveyor (2) and the coiling conveyor (3) are used to continuously convey fabrics for screen printing; It is characterized by: Also includes: A screen printing mechanism is provided on the right side of the top of the screen printing machine body (1), and the screen printing mechanism includes a driving support seat (4), and a lifting horizontal plate (5) is slidably installed on the front of the driving support seat (4), and a feeding screen printing frame (6) is provided below the middle of the front of the lifting horizontal plate (5); A positioning mechanism is fixedly mounted on the top surface of the screen printing machine body (1), and the positioning mechanism includes a positioning frame (7), and a positioning bearing plate (8) is slidably mounted on the right side of the top surface of the positioning frame (7), and the positioning bearing plate (8) is used to lift the cloth so as to define the screen printing area; The positioning mechanism includes a pressure transverse plate (15), and the bottom end of the pressure transverse plate (15) slides through the front and rear sides of the interior of the positioning bearing plate (8), and the pressure transverse plate (15) and the positioning bearing plate (8) are connected to each other through a resistance spring (16), and the front and rear ends of the positioning bearing plate (8) are both provided with a correction flip plate (17) for rotation through a torsion spring, and the inner wall of the symmetrically arranged correction flip plate (17) and the bottom end of the positioning bearing plate (8) are connected to each other through a traction cable (19); The bottom surface of the positioning support plate (8) is provided with a calibration mechanism, and the calibration mechanism includes a calibration contact block (22), and the calibration contact block (22) is fixedly installed on the front and rear sides of the middle of the bottom surface of the positioning support plate (8), and the bottom surface of the symmetrically arranged calibration contact block (22) is slidably connected to the top surface of the sliding contact block (23), and the contact surfaces of the correspondingly distributed calibration contact blocks (22) and the sliding contact blocks (23) are distributed in an inclined structure; The inner ends of the sliding resistance blocks (23) included in the calibration mechanism are fixedly mounted with guide racks (24), and the inner ends of the symmetrically arranged guide racks (24) are meshed with guide gears (25), and the guide gears (25) are rotatably mounted on the inner bottom surface of the positioning frame (7), and the rear sliding resistance blocks (23) slide through the outside of the positioning frame (7); The calibration mechanism includes a lifting lining (9), and the lifting lining (9) is fixedly installed on the middle part of the back of the feeding screen printing frame (6), and the bottom end of the lifting lining (9) is slidably installed on the top surface of the sliding resistance block (23) outside the positioning frame (7), and the rear sliding resistance block (23) and the bottom end of the driving support seat (4) are connected to each other through a return spring (18), and the lifting lining (9) is driven down by the feeding screen printing frame (6), and after squeezing the sliding resistance block (23) and the calibration resistance block (22), the positioning support plate (8) drives the cloth to rise to realize the positioning of the screen printing area.

2. The positioning mechanism of the screen printing frame of a screen printing machine according to claim 1, characterized in that: The screen printing mechanism includes an adjustable clamping arm (10), and the adjustable clamping arm (10) is slidably mounted on the left and right sides of the front of the lifting horizontal plate (5), and the bottom ends of the symmetrically arranged adjustable clamping arms (10) are detachable to clamp and position the outer ends of the feeding screen printing frame (6), and an ink scraper (11) is slidably mounted on the middle part of the front of the lifting horizontal plate (5).

3. The positioning mechanism of the screen printing frame of a screen printing machine according to claim 2, characterized in that: The screen printing mechanism includes a screen printing plate (12), and the screen printing plate (12) is detachably mounted at the inner center of the feeding screen printing frame (6), and the screen printing plate (12) is provided with printing slots (13) at equal intervals, and the printing slots (13) are arranged according to the desired pattern.

4. The positioning mechanism of the screen printing frame of a screen printing machine according to claim 3, characterized in that: The screen printing mechanism includes an ink storage area (14), and the ink storage area (14) is located between the left and right ends of the printing screen plate (12) and the printing slot (13). The ink storage area (14) is fitted with a sliding ink scraper (11), so that the ink scraper (11) scrapes the ink to the printing slot (13) and prints the ink downward on the surface of the cloth to form a desired pattern.

5. The positioning mechanism of the screen printing frame of a screen printing machine according to claim 1, characterized in that: The positioning mechanism includes an adjustable friction strip (20), and both left and right outer ends of the adjustable friction strip (20) are rotatably connected to the inner end of the pitch-adjusting screw (21) through bearings, and the outer end threads of the symmetrically arranged pitch-adjusting screw (21) penetrate the upper end of the deviation-correcting flip plate (17). The adjustable friction strip (20) and the deviation-correcting flip plate (17) connected by the pitch-adjusting screw (21) are adapted to fabrics of different widths to achieve deviation correction.

6. The positioning mechanism of the screen printing frame of a screen printing machine according to claim 5, characterized in that: After the feeding screen printing frame (6) is lowered, the positioning support plate (8) and the surface fabric are synchronously raised, and the fabric is stretched and tightened, and then the pressure plate (15) is lowered, so as to drive the deviation correction flip plates (17) and the adjustable resistance strips (20) on the front and rear sides to rotate upward and resist against the side of the fabric, thereby avoiding misalignment during the screen printing process and affecting the printing effect.

Images