Surface screen printing industry has a long way to go

Curved silk screen printing refers to the screen printing on the surface of the round surgical shape, such as bottles, medicine bottles, wine bottles, etc. Most of them are cylindrical or almost cylindrical surfaces, (the curved surface of the flat bottle is cylindrical Shaped surface), rarely also conical, spherical. Regardless of the kind of curved surface, the principle of printing is only one, that is, the silk screen surface should be purely rolled with the screen. In the scroll, the curved surface and the screen are tangent to the deposition point of the squeegee. The extension line always points to the center of the circle.

The design of the curved screen printing machine is also based on this principle, and it is generally based on the rack-and-pinion transmission of the rack and pinion. In the telecontrol, the screen version is equivalent to a rack. The surface is equivalent to a gear. The radius of the surface is the same as the radius of the common circle of the gear. When printing, the center of the curved surface is coaxially aligned with the center of the gear. The screen printing is carried out into the rack and the screen to make the horizontal linear motion gear and the printing hand rotate under the concentric circle of the curved surface under the pulling of the rack. Under normal circumstances, the bottle is positioned with the bottle positioned low and then the bottle is tightly closed. For a round bottle, there is a distance between the bottle center and the center of the circle. There are two ways to print the circle: the first is a fixed center, the squeegee does not move, the bottle rotates around the center of the circle, and the screen moves horizontally. It is generally used for automatic machines.

At present, the widely used curved screen printing machine is based on semi-automatic machines, because this type of machine is more suitable for small and medium-sized enterprises, manufacturers of small batch orders, the type of replacement is fast, easy to operate, the cost of the purchase is relative to the automatic screen printing The machine is low. However, with external surface curing machines and curing machines, more workers are required to operate. The automatic screen printing machine, automatic feeding, flame surface treatment, screen printing, curing as a high efficiency, less labor, is more suitable for larger quantities of manufacturers. Automatic machines are divided into monochrome automata and multicolor automata. Multi-color automatic machines are generally more suitable for long-term large-scale orders, can be printed on a machine two to five colors, the fastest production efficiency of 5000 P / H.

Due to the high selling price of fully automatic screen printing machines, the models must be selected at the time of purchase. The functions of the fully automatic machines produced at each factory are basically the same, but the design of the structure is very different. A high-efficiency, high-speed operation of a fully-automated machine, smooth transfer of bottles, and accurate color printing are the key to mechanical design. The traditional screen printing machine has many defects in the mechanical design. In the following, we use the monochrome automatic machine (collectively referred to as 101) to divide the board.

1. When the bottle moves from one worker to another, the starting angle is small. When the bottle is moved, it easily hits the edge of the groove and generates an eccentric position. Then when it moves to the next slot, it shifts and falls. The transfer will not be smooth.

2. The transmission mechanism also has an iron close to the dead point. The impact is large and the mechanism is fragile and cannot be operated at high speed.

3, the screen printing position swings, also makes the male precision affect love.

4, adjustment agencies cumbersome, adjust the staff do not know the principle, in order to find the correct position, it takes a lot of effort, need a very skilled transfer personnel to adjust well, so that many manufacturers recruitment industry workers do not have trouble, sometimes Manufacturers bought the machine but could not find the staff to adjust the machine.

In response to this problem, some companies produce more stable and faster machinery. All adjustments are made before the factory leaves the factory. The advantages are:

1. The bottle iron is 180 degrees, and the bottle will immediately fall vertically.

2, the transmission angle, away from the dead point, high speed and high speed.

3, silk screen institutions to strengthen the processing, will not produce left and right swing, so that overprint accuracy.

4, when changing the variety, tooling, rarely mobilize and many other advantages.

In recent years, due to the progress and development of other packaging and printing processes, the surface screen printing industry has been greatly hit (Taiwan labeling, sleeve labeling). Therefore, some people think that curved screen printing is outdated, and some manufacturers have thus loved certain influences, but we believe that the potential of curved screen printing has not yet been fully excavated, but people in the industry continue to work hard and have a long way to go.

Source: International Screen Printing