Rotary screen printing machine

Abstract

The utility model belongs to the technical field of post-processing of printed fabrics, and particularly relates to a circular screen printer. The rotary screen printing machine comprises a base, a first cloth guiding roller, a second cloth guiding roller and a cloth rolling assembly are sequentially arranged on the base from front to back, and the height of the first cloth guiding roller is larger than that of the second cloth guiding roller; the cloth winding assembly comprises a first cloth winding roller and a second cloth winding roller, and the lowest point of the second cloth guiding roller, the lowest point of the first cloth winding roller and the lowest point of the second cloth winding roller are located at the same horizontal height. A driving motor is arranged at one end of the first cloth roller.

Description

Technical Field

[0001] This utility model belongs to the field of printing fabric post-processing technology, specifically relating to a rotary screen printing machine. Background Technology

[0002] Rotary screen printing machines are continuous, automated fabric printing equipment that uses a cylindrical nickel screen (rotary screen) as the printing template. First invented by Stork in the Netherlands in 1963, its core feature is the efficient, multi-color overprinting of ink onto the fabric surface through a rotating rotary screen. The equipment mainly consists of a fabric feeding device, a rotary screen printing unit (including a squeegee or magnetic roller), a conveyor belt circulation system, a drying device, and an automatic pattern matching system. Suitable for large-scale industrial production, it is one of the mainstream technologies in the current printing and dyeing industry.

[0003] The printed fabric produced by the rotary screen printing machine is wound up at the rear of the main unit. During the fabric winding process, due to the fabric's high elasticity, a central axis rotation method is usually not used for winding. With a central axis rotation method, as the diameter of the fabric roll increases, the tension on the fabric continuously increases during rotation, causing the fabric roll to be loose on the inside and tight on the outside. To solve this problem, an outer perimeter winding method is usually used when winding the fabric. This involves the rotating roller contacting the outer perimeter of the fabric roll, and the rotation of the roller further drives the fabric roll to rotate and wind it up. This winding method results in smaller changes in the tension of the fabric rolled up, preventing severe inner looseness and outer tightness.

[0004] However, traditional peripheral winding devices do not limit the direction of fabric introduction, resulting in significant changes in the fabric's introduction angle during the winding process. This leads to considerable variations in the fabric's winding state and inconsistent tension between the inner and outer layers. To address this issue, this invention aims to provide a rotary screen printing machine. Utility Model Content

[0005] The purpose of this invention is to provide a rotary screen printing machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary screen printing machine includes a base, on which a first feed roller, a second feed roller, and a roll-up assembly are arranged sequentially from front to back. The height of the first feed roller is greater than that of the second feed roller. The roll-up assembly includes a first roll-up roller and a second roll-up roller. The lowest points of the second feed roller, the first roll-up roller, and the second roll-up roller are at the same horizontal height. A drive motor is provided at one end of the first roll-up roller.

[0008] Preferably, the front side of the first fabric rolling roller is provided with a first crossbeam, the rear side of the second fabric rolling roller is provided with a second crossbeam, and the top of the first and second crossbeams are provided with a left limiting stop and a right limiting stop.

[0009] Preferably, the left limiting stop has a left vertical bar at its center and the right limiting stop has a right vertical bar at its center.

[0010] Preferably, the first crossbeam is provided with an adjustment elongated hole 1 and an adjustment elongated hole 2 on its left and right sides respectively, and the second crossbeam is provided with an adjustment elongated hole 3 and an adjustment elongated hole 4 on its left and right sides respectively; the two ends of the left limiting stop are provided with fixing bolts, and the two ends of the left limiting stop are connected to the adjustment elongated hole 1 and the adjustment elongated hole 3 respectively; the two ends of the right limiting stop are provided with fixing bolts, and the two ends of the right limiting stop are connected to the adjustment elongated hole 2 and the adjustment elongated hole 4 respectively.

[0011] Preferably, the surfaces of the first fabric guide roller, the second fabric guide roller, the first fabric roll roller, and the second fabric roll roller are all provided with rubber friction surfaces.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The rotary screen printing machine provided by this utility model is equipped with a first feed roller and a second feed roller. The height of the first feed roller is greater than the height of the second feed roller, the first roll roller and the second roll roller. The fabric introduced passes through the first feed roller. Since the relative positions of the first feed roller, the second feed roller, the first roll roller and the second roll roller are fixed, the shape, angle and other states of the fabric remain relatively stable after the fabric passes through the first feed roller and then further through the second feed roller. This makes the fabric tension more consistent when the fabric is rolled up at the second and third roll rollers, which can effectively avoid the uneven tension of the fabric before and after rolling.

[0014] (2) The rotary screen printing machine provided by this utility model has a left limiting rod and a right limiting rod at the top of the first and second crossbeams. The top of the left limiting rod has a left vertical rod, and the top of the right limiting rod has a right vertical rod. The setting of the left limiting rod and the right limiting rod can prevent the fabric roll from shifting during the winding process. The left vertical rod and the right vertical rod correspond to the two ends of the central axis of the fabric roll, and the left vertical rod and the right vertical rod can always limit the position of the central axis.

[0015] (3) The rotary screen printing machine provided by this utility model has an adjustable left limit stop and a right limit stop, which enables the device to adapt to fabric rolls of different widths. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2This is a schematic diagram of the structure of this utility model after the central axis is erected;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 This is a top view of the present invention;

[0020] In the diagram: 1. Base; 2. Fabric guide roller 1; 3. Fabric guide roller 2; 4. Fabric winding assembly; 5. Fabric winding roller 1; 6. Fabric winding roller 2; 7. Central shaft; 8. Crossbeam 1; 9. Crossbeam 2; 10. Left limit stop; 11. Right limit stop; 12. Left vertical rod; 13. Right vertical rod; 14. Adjusting elongated hole 1; 15. Adjusting elongated hole 2; 16. Adjusting elongated hole 3; 17. Adjusting elongated hole 4; 18. Fixing bolt; 19. Drive motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. It should be emphasized that the main body of the printing machine involved in the present utility model is a conventional technical means.

[0022] A rotary screen printing machine includes a printing machine body and a winding device. The printing process on the fabric is completed at the printing machine body, and the fabric is wound up at the winding device. The winding device includes a base 1, on which are arranged sequentially from front to back: a first feed roller 2, a second feed roller 3, and a winding assembly 4. The fabric to be printed is introduced from the first feed roller 2 and then passes sequentially through the second feed roller 3 and the winding assembly 4. The height of the first feed roller 2 is greater than the height of the second feed roller 3. The fabric passes through the top surface of the first feed roller 2 and the bottom surface of the second feed roller 3 in a Z-shaped pattern, ensuring a stable fabric shape. The winding assembly 4 includes a first winding roller 5 and a second winding roller 6. The lower apex of the second feed roller 4, the lower apex of the first winding roller 5, and the lower apex of the second winding roller 6 are at the same horizontal height. The fabric passing through the bottom surface of the second feed roller 3 further passes through the bottom surface of the first winding roller 5 and finally enters the central shaft 7 between the first winding roller 5 and the second winding roller 6. The central shaft 7 is positioned between the first winding roller 5 and the second winding roller 6, which support the central shaft 7. The rotation of the first winding roller 5 and the second winding roller 6 drives the central shaft 7 to rotate, ultimately enabling the central shaft 7 to wind the fabric. To prevent slippage between the fabric and components such as the first winding roller 2, the second winding roller 3, the first winding roller 5, and the second winding roller 6, the surfaces of the first winding roller 2, the second winding roller 3, the first winding roller 5, and the second winding roller 6 are all equipped with rubber friction surfaces. To drive the rotation of the central shaft 7, a drive motor 19 is located at one end of the first winding roller 5. The drive motor 19 drives the first winding roller 5 to rotate, which in turn drives the central shaft 7 to rotate. The central shaft 7 has a certain weight. When the central shaft 7 is positioned between the first winding roller 5 and the second winding roller 6, the first winding roller 5 can drive the central shaft 7 to rotate. Simultaneously, the second winding roller 6 can act as a non-powered roller, rotating along with the central shaft 7 under the influence of friction. To prevent the central shaft 7 from shifting during winding, a crossbeam 8 is provided on the front side of the first winding roller 5, and a crossbeam 9 is provided on the rear side of the second winding roller 6. The design of the crossbeams 8 and 9 greatly enhances the stability of the device. A left limiting stop 10 and a right limiting stop 11 are provided at the top of the crossbeams 8 and 9. A left vertical rod 12 is located at the center of the left limiting stop 10, and a right vertical rod 13 is located at the center of the right limiting stop 11. The two ends of the central shaft 7 abut against or approach the left vertical rod 12 and the right vertical rod 13, respectively, and all three are located on the same plane. As the fabric roll gradually increases in size, the two ends of the central shaft 7 still abut against or approach the left vertical bar 12 and the right vertical bar 13. To accommodate central shafts 7 of different lengths, the left and right sides of the first crossbeam 8 are respectively provided with adjusting elongated holes 14 and 15, and the left and right sides of the second crossbeam 9 are respectively provided with adjusting elongated holes 16 and 17. The two ends of the left limiting stop 10 are respectively provided with fixing bolts 18, and the two ends of the left limiting stop 10 are connected to adjusting elongated holes 14 and 16 respectively.The right limit stop 11 has fixing bolts 18 at both ends, and the two ends of the right limit stop 11 are respectively connected to the second adjustment elongated hole 15 and the fourth adjustment elongated hole 17. The left limit stop 10 or the right limit stop 11 can be adjusted left or right as needed.

[0023] During operation, the fabric is drawn from the main body of the printing machine, passes sequentially through the top surface of the first feed roller 2, the bottom surface of the second feed roller 3, and then through the gap between the first roll roller 5 and the second roll roller 6 before being wound into the central shaft 7. The first roll roller 5 is driven by the drive motor 19 to rotate counterclockwise, while the central shaft 7 is driven by the first roll roller 5 to rotate clockwise. The fabric passes the right side of the bottom surface of the first roll roller 5 and is then wound into the central shaft 7.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary screen printing machine comprising a printing machine body and a take-up device, characterized in that: The winding device includes a base, on which a first guide roller, a second guide roller, and a winding assembly are arranged sequentially from front to back. The height of the first guide roller is greater than that of the second guide roller. The winding assembly includes a first winding roller and a second winding roller. The lowest points of the second guide roller, the first winding roller, and the second winding roller are at the same horizontal height. A drive motor is provided at one end of the first winding roller.

2. A rotary screen printing machine according to claim 1, characterised in that: A crossbeam one is provided on the front side of the first fabric rolling roller, and a crossbeam two is provided on the rear side of the second fabric rolling roller. A left limiting stop and a right limiting stop are provided on the top of the first and second crossbeams.

3. A rotary screen printing machine according to claim 2, characterised in that: The left limiting stop has a left vertical bar at its center, and the right limiting stop has a right vertical bar at its center.

4. A rotary screen printing machine according to claim 2, characterised in that: The first crossbeam is provided with an adjustment elongated hole 1 and an adjustment elongated hole 2 on its left and right sides, respectively; the second crossbeam is provided with an adjustment elongated hole 3 and an adjustment elongated hole 4 on its left and right sides, respectively; the two ends of the left limiting stop are provided with fixing bolts, and the two ends of the left limiting stop are connected to the adjustment elongated hole 1 and the adjustment elongated hole 3, respectively; the two ends of the right limiting stop are provided with fixing bolts, and the two ends of the right limiting stop are connected to the adjustment elongated hole 2 and the adjustment elongated hole 4, respectively.

5. A rotary screen printing machine according to claim 1, characterised in that: The surfaces of the first fabric guide roller, the second fabric guide roller, the first fabric roll roller, and the second fabric roll roller are all provided with rubber friction surfaces.

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