CN202498814U - A simple positioning device for substrates of screen printing machines - Google Patents

Abstract

The utility model discloses a simple positioning device for screen printing substrates, comprising a workbench and a screen, a scraper is arranged on the screen, and a transparent polyester film is fixed on the workbench by double-sided adhesive. The simple positioning device for screen printing substrates can complete the accurate positioning of the printed substrates at one time, greatly saving costs and improving the production efficiency of products.

Description

A simple positioning device for substrates of screen printing machines

technical field

The utility model belongs to the technical field of printing, and relates to a positioning device for a substrate, in particular to a simple positioning device for a substrate of a screen printing machine.

Background technique

Screen printing belongs to stencil printing, and it is called the four major printing methods together with offset printing, embossing printing, and gravure printing. The basic principle is: use the basic principle of the screen printing plate to print through the ink in the mesh part of the graphic part, and impermeable to the ink in the non-graphic part of the mesh. When printing, pour ink into one end of the screen printing plate, apply a certain amount of pressure on the ink part of the screen printing plate with the scraper, and at the same time, print towards the other end of the screen printing plate. The ink is squeezed by the scraper from the mesh of the graphic part to the substrate during the movement. Due to the viscosity of the ink, the imprint is fixed within a certain range. During the printing process, the scraper is always in line contact with the screen printing plate and the substrate, and the contact line moves with the movement of the scraper. Due to the screen printing plate and the substrate Keep a certain gap between them, so that the screen printing plate during printing will generate a reaction force against the scraper through its own tension. This reaction force is called rebound force. Due to the effect of resilience, the screen printing plate and the substrate are only in moving line contact, while other parts of the screen printing plate are in a state of separation from the substrate. Make the ink and the screen break and move, ensuring the printing size accuracy and avoiding the dirty substrate. When the scraper scrapes across the entire page, it is lifted up, and the screen printing plate is also lifted up at the same time, and the ink is gently scraped back to the original position, so far it is a printing stroke. In the printing process, the positioning of the substrate is generally through the trial printing of the substrate first, and then adjust the position of the substrate on the workbench according to the position of the printed graphic on the substrate to complete the printing of the substrate on the workbench. of the positioning. In the process of adjusting the substrate, the operation is generally based on the operator's experience and feeling, so it is often necessary to try several times to finally determine the correct position of the substrate on the workbench, resulting in waste of ink and printing materials , and extended working hours.

Contents of the invention

The purpose of this utility model is to provide a simple positioning device for substrates of screen printing machines, which solves the problem of wasting raw materials in the prior art that substrates have to go through multiple trial printings, and greatly shortens the printing operation time.

The technical scheme adopted by the utility model is a simple positioning device for substrates of a screen printing machine, including a workbench and a screen, a scraper is arranged on the screen, and a transparent polyester film is fixed on the workbench by double-sided adhesive .

The beneficial effect of the utility model is: by transferring the printed pictures and texts to the simple positioning device, the precise positioning of the printing substrate can be completed at one time, greatly saving the cost and improving the production efficiency of the product.

Description of drawings

Fig. 1 is a schematic structural view of a simple positioning device for substrates of a screen printing machine of the present invention.

In the figure, 1. Screen, 2. Workbench, 3. Transparent polyester film, 4. Substrate, 5. Squeegee, 6. Ink.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The structure of the simple positioning device for the substrate of the screen printing machine of the utility model, as shown in Figure 1, includes a workbench 2 on which a transparent polyester film 3 is fixed by double-sided adhesive, and also includes a screen 1, a screen 1 is provided with scraper 5.

The working process of the simple positioning device for printed matter of the screen printing machine of the utility model is as follows: before the trial printing, a transparent polyester film 3 is first placed on the printing workbench 2, and its size can be as large as the printing screen plate, or slightly larger. Smaller, one side and the printing table 2 are fixed with double-sided tape. Then try printing, transfer the screen image and text information to the transparent polyester film 3, place the printed substrate 4 under the transparent polyester film 3 printed with the image and text, and adjust the position of the substrate 4 relative to the transparent polyester film 3 , so that the graphic information on the transparent polyester film 3 is just at the printing position of the substrate 4, so that the correct position of the substrate 4 on the printing table 2 can be correctly determined. At this time, remove the transparent polyester film 3 and the double-sided Glue, just print according to the determined printing job position.

Claims (1)

1. A simple positioning device for substrates of a screen printing machine, comprising a workbench (2) and a screen (1), the screen (1) being provided with a scraper (5), characterized in that the workbench (2) A transparent polyester film (3) is fixed on the top by double-sided adhesive tape.

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