Screen printing machine and lifting assembly for printing of screen printing machine

Abstract

The utility model relates to the technical field of lifting assemblies, in particular to a screen printing machine and a lifting assembly for printing of the screen printing machine. The lifting assembly for printing comprises a vertically-arranged vertical frame, a frame plate used for installing a translation assembly and an ink scraping assembly is arranged on one side of the vertical frame, and a traction air cylinder which is connected with the frame plate and used for applying traction force equal to the overall gravity of the frame plate and auxiliary assemblies to the frame plate is vertically arranged at the top of the vertical frame. A reversing air cylinder which is connected with the frame plate and is used for providing an instant initial pushing force according to the ascending or descending direction of the frame plate, helping to quickly start the ascending and descending process and reducing shaking during starting is vertically arranged at the lower part of the vertical frame; due to the fact that the lifting assembly is provided with the traction air cylinder and the reversing air cylinder, traction force with the low change amplitude can be applied to the scraper assembly through the traction air cylinder, and instant pushing force for reducing shaking during starting can be applied to the scraper assembly through the reversing air cylinder during reversing.

Description

Technical Field

[0001] This application relates to the field of lifting component technology, and in particular to a screen printing machine and its printing lifting component. Background Technology

[0002] As a widely used printing method, the printing effect of screen printing largely depends on the stability and accuracy of the squeegee assembly during the printing process. Traditional screen printing machines often use a single cylinder to drive the squeegee assembly when raising and lowering it. This method is prone to unstable raising and lowering of the squeegee assembly due to large air pressure fluctuations, which in turn affects the printing quality. In addition, single cylinder drive also has the problems of high energy consumption and large air source consumption. Utility Model Content

[0003] The problem this application aims to solve is that existing screen printing machines often use a single cylinder to drive the raising and lowering of the doctor blade assembly. This not only leads to unstable raising and lowering of the doctor blade assembly due to large air pressure fluctuations, but also results in high energy consumption and large air source consumption.

[0004] To address the aforementioned technical problems, this application provides a printing lifting assembly, including a vertically arranged frame. A mounting plate for installing a translation component and a doctor blade assembly is arranged on one side of the frame. A traction cylinder, connected to the mounting plate, is vertically arranged at the top of the frame and applies a traction force equal to the combined weight of the frame and its associated components to the mounting plate. A reversing cylinder, connected to the mounting plate, is vertically arranged at the bottom of the frame and provides an instantaneous initial thrust according to the direction the mounting plate needs to rise or fall, helping to quickly start the lifting process and reducing vibration during startup.

[0005] Because the lifting assembly of this application is designed with a traction cylinder and a reversing cylinder, it can apply a traction force with a low pressure variation to the doctor blade assembly through the traction cylinder, and apply an instantaneous pushing force to the doctor blade assembly to reduce vibration during startup when reversing through the reversing cylinder. This solves the problem that existing screen printing machines often use a single cylinder to drive the lifting and lowering of the doctor blade assembly, which not only leads to unstable lifting and lowering of the doctor blade assembly due to large air pressure fluctuations, but also has the problems of high energy consumption and large air source consumption. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the front structure of a screen printing machine.

[0007] Figure 2 This is a schematic diagram of the rear structure of a screen printing machine.

[0008] Figure 3 This is a front view structural diagram of the lifting assembly.

[0009] Figure 4 This is a top view of the structure of an embodiment.

[0010] Figure 5 This is a schematic diagram of the rear view structure of an embodiment.

[0011] In the diagram: 1. Lifting assembly; 2. Lateral movement assembly; 3. Scraper assembly; 4. Pressure equalization tank; 5. Pressure gauge; 6. Frame; 7. Traction cylinder; 8. Guide rod; 9. Sliding sleeve; 10. Frame plate; 11. Reversing cylinder. Detailed Implementation

[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0013] This application relates to a screen printing machine and its lifting assembly for printing, such as... Figure 1-5 As shown, the screen printing machine includes a lifting assembly 1, a horizontal moving assembly 2, and a squeegee assembly 3. The lifting assembly 1 is used to drive the horizontal moving assembly 2 and the squeegee assembly 3 to perform vertical lifting operations. The horizontal moving assembly 2 is used to drive the squeegee assembly 3 to perform horizontal horizontal moving operations. The squeegee assembly 3 is used to perform ink scraping and printing operations on the screen surface. Among them, the lifting assembly 1 is the core innovation of this application. The lifting assembly 1 includes a frame 6, guide rods 8, a frame plate 10, and sliding sleeves 9. The frame 6 is arranged vertically, and guide rods 8 are evenly distributed around it to ensure the stability of the lifting process. A frame plate 10 is arranged on one side of the frame 6 for installing the horizontal moving assembly and the ink scraping assembly. Squeegees 9, which are slidably connected to the guide rods 8, are symmetrically arranged on the back of the frame plate 10 to realize the up and down sliding of the frame plate 10 along the guide rods 8.

[0014] To significantly improve the stability of the doctor blade assembly during lifting, the lifting assembly 1 further includes a traction cylinder 7 and a reversing cylinder 11. The traction cylinder 7 is vertically arranged on the top of the frame 6 and connected to the frame plate 10. It is mainly responsible for applying a traction force to the frame plate 10 that is equal to the overall weight of itself and its auxiliary components (including the translation assembly, doctor blade assembly, etc.), ensuring that the doctor blade assembly can maintain a stable posture when stationary or moving. The reversing cylinder 11 is vertically arranged at the bottom of the frame 6 and is also connected to the frame plate 10. Its function is to provide an instantaneous initial thrust according to the direction in which the frame plate 10 needs to rise or fall, helping to quickly start the lifting process and reduce shaking during startup.

[0015] To facilitate monitoring of the working status of the traction cylinder 7 and the reversing cylinder 11, pressure gauges 5 are connected in series in the air circuits of both, allowing operators to intuitively understand the internal pressure changes of the cylinders and make timely adjustments to ensure optimal working conditions. To further reduce pressure fluctuations caused by the large weight of the traction cylinder 7, a pressure equalization tank 4 is added to the air circuit of the traction cylinder 7. The large volume of the pressure equalization tank 4 can effectively balance the air pressure changes during the traction process, making the traction force more stable.

[0016] Specific operating steps for lifting component 1:

[0017] (1) Initial preparation:

[0018] Ensure that all components of the screen printing machine, especially the lifting assembly 1, are in good working condition and free from damage or abnormalities. Check that the air circuit connections of the traction cylinder 7 and the reversing cylinder 11 are tight, that the pressure gauge 5 displays normally, and that the pressure equalization tank 4 has sufficient gas. Adjust the position of the squeegee assembly and the translation assembly according to the printing requirements to ensure that they are aligned with the material to be printed.

[0019] (2) Start the lifting assembly 1:

[0020] Depending on the needs of the printing process, the decision is made whether the printing rack 10 should rise or fall. The reversing cylinder 11 is activated via the control panel or manual switch, which applies an instantaneous initial thrust according to the required lifting direction. This action helps the printing rack 10 start up quickly, reducing start-up delay and vibration.

[0021] (3) Smooth rise and fall:

[0022] When the traction cylinder 7 starts working and applies a traction force equal to its own weight and that of its auxiliary components, the reversing cylinder 11 begins to apply an initial pushing force. During this process, the pressure gauge 5 will display the air pressure changes inside the traction cylinder 7, which the operator can then fine-tune to ensure stable air pressure. With the pulling force of the traction cylinder 7, the sliding sleeve 9 on the back of the frame plate 10 slides smoothly along the guide rod 8 of the upright frame 6, realizing the lifting and lowering of the ink scraping assembly. The even distribution of the guide rod 8 ensures the smoothness and straightness of the lifting and lowering process.

[0023] (4) Monitoring and Adjustment:

[0024] Throughout the lifting process, the operator should continuously observe the pressure gauge 5 on the air circuit of the traction cylinder 7 and the reversing cylinder 11 to ensure that the air pressure remains within the set range. If there is any abnormal fluctuation, the operation should be stopped immediately and the cause checked by the pressure equalization tank.

[0025] (5) Arrive at the target location:

[0026] When the scraper assembly reaches the predetermined lifting height, the control system will automatically or manually stop the operation of the reversing cylinder 11, while the traction cylinder 7 will always apply a vertical upward traction force to the frame plate 10 to ensure that the scraper assembly is stably stopped in the required position. The operator can confirm the accuracy of the scraper assembly's position by visual inspection or with the help of a positioning device.

[0027] (6) Complete printing preparation:

[0028] After confirming that the doctor blade assembly is in the correct position, subsequent printing operations can be carried out, such as adjusting the doctor blade angle, speed, and other parameters, in preparation for starting printing.

[0029] (7) Lifting and resetting:

[0030] After printing is complete, raise or lower the squeegee assembly to the initial position or the next printing position as needed, and repeat the above steps.

[0031] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0032] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0033] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A printing lifting assembly, comprising a vertically arranged frame (6), characterized in that: A frame plate (10) for mounting translation components and ink scraping components is arranged on one side of the frame (6). A traction cylinder (7) connected to the frame plate (10) is arranged vertically on the top of the frame (6) to apply a traction force equal to the overall gravity of the frame plate (10) and its auxiliary components to the frame plate (10). A reversing cylinder (11) connected to the frame plate (10) is arranged vertically on the lower part of the frame (6) to provide an instantaneous initial thrust according to the direction in which the frame plate (10) needs to rise or fall, to help quickly start the lifting process and reduce shaking during startup.

2. The printing lifting assembly according to claim 1, characterized in that: The air circuit of the traction cylinder (7) is also connected to a pressure equalization tank (4) to balance the air pressure changes during the traction process and make the traction force more stable.

3. The printing lifting assembly according to claim 1, characterized in that: Pressure gauges (5) are connected in series in the air lines of the traction cylinder (7) and the reversing cylinder (11).

4. The printing lifting assembly according to claim 1, characterized in that: Guide rods (8) are evenly distributed around the frame (6).

5. The printing lifting assembly according to claim 2, characterized in that: The back of the frame plate (10) is symmetrically arranged with sliding sleeves (9) that are slidably connected to the guide rod (8).

6. A screen printing machine comprising a printing lifting assembly as described in any one of claims 1-5, characterized in that: It also includes a horizontal movement component (2) and a scraper component (3), which perform vertical lifting and lowering operations of the scraper component (3) under the drive of the lifting component (1).

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