Skip to main content

Things You Don't Know About Screen Printing in Membrane Switch Manufacturing

 Hi guys, this is JRPanel! As a professional one-stop industrial manufacturer, we aim to share the most valuable contents with people who are interested in Membrane Switch, Sheet Metal, PCB and High Frequency Transformer.

 



In this blog, JRPanel would like to take you to explore more about Screen Printing in Membrane Switch Manufacturing. These points will help you understand more fully the screen printing process in JRPanel factory.


First let's introduce the decorative inks for the graphic layer and the tips notable during printing, summaried by JRPanel engineers.

 

1. The ink used on the graphic layer is solvent volatile ink. There are actually many varieties of this type of ink. However, when selecting, it is necessary to consider the ink fineness, color purity, color coverage, and bonding fastness with the substrate.

 

2. In multi-color printing, following the principle of printing dark colors first and then printing light colors is important. When printing light colors, it is best to print twice to ensure complete ink coverage and improve ink saturation. This way, when the color overprinting, can avoid color transmission.

 

In most people's mind, in screen printing of membrane panel switches, finishing the printing on the graphic layer means the whole printing process is over. But in the actual printing process, we usually also print on the back of the panel. Simply put, printing on the back side helps prevent the panel ink layer from wearing off and protect the color of the graphics.

 

When silkscreening the back of the panel, we should pay attention to:

 

1. A cleanup of the ink layer on the back of the panel is necessary. This is to improve the covering ability of the ink and effectively prevent revealing the circuit behind the panel.

 

2. When screen printing on the back of the panel, we usually choose silver ink. In addition to better coverage, the silver ink can also highlight the ink on the front side.

 

In addition, silver ink is more used in circuit printing, as well as carbon ink. When printing silver ink and carbon ink, there are also a few points to pay attention to:

 

1. Silver and carbon inks need to be fully stirred before screen printing, and they should be stirred up and down. Otherwise, the printed resistance and conductive properties of the same ink in different screen printing stages are different, which sometimes affects the adhesion to the film.

 

2. After the correct screen printing operation, the silver and carbon inks must be left on the film for a while. Wet the substrate with a bath agent and then put it in an oven and dry it as required to ensure adhesion to the film.

 

3. In order to accurately ensure the conductivity of silver and carbon ink, the drying degree is divided into three levels, namely low temperature, medium temperature and specified temperature. If the resistance value deviates from the requirements, it needs to be dried again until the resistance value reaches the design requirements.

 

4. The resistance value should be tested according to the square resistance value, because the end resistance value does not take the width and thickness of the printed line into account.

 

5. Do not put the silver ink that has not been printed this time back into the original can. Pour it into a clean can and use it next time to ensure the service life of the silver ink in the original can.

 

6. Due to the characteristics of silver and carbon ink, we should choose a softer squeegee during silk screen printing, and implement the printing principle of light squeegee and heavy re-ink.

Comments

Post a Comment

Popular posts from this blog

Identify Different Types of Transformer Cores, Based on Materials

  Hi guys, this is JRPanel ! In previous  blog s, we have introduced several points about High Frequency Transformer, like  bobbins  and  Flat Spiral Coil . In this blog, JRPanel would like to introduce the commonly used magnetic cores in transformers ,  based on materials.   Generally speaking, the material of the core determines the environment in which the transformer is used. A transformer that uses a core of a different material will have its performance affected, may even be non-functional.   By material, magnetic cores are generally divided into the  several  categories . JRPanel will introduce them one by one to help you understand more fully.   1. Manganese Zinc Ferrite Core Mn-Zn core is a soft magnetic core with high initial permeability (2000~15000). The higher the initial permeability, the lower the surface resistance, so it is generally used in circuits below 1 MHz. Mn-Zn core has a high saturation flux density and causes lower losses, making it one of the most desirable
Post a Comment
Read more

The Relationship Between Plastic Nameplates and Membrane Switches

Before the 1970s, most nameplates   were made of metal materials. Today, plastic  nameplates   have been widely used in household appliances, instruments, meters, office equipment and other fields, and have become an indispensable part of electromechanical products. It not only plays the role of trademark identification, specification model, function indication, etc., but also becomes an element that reflects the appearance of the product.   With the continuous use of new materials and new processes, the surface of plastic  nameplates   is constantly improving, and it has become the crystallization of three major technologies: comprehensive surface treatment, processing and molding, and screen printing.   Plastic  nameplates   can be divided into 2 types according to their material processing methods and objects of use:   1. The injection-type plastic  nameplate   is made of ABS, PC and other engineering injection molding, and then undergoes secondary surface decoration processing such
Post a Comment
Read more

The Main Use and Classification Methods of Transformer Bobbins

  Hi guys, this blog is still about   high frequency transformers .   JRPanel   would like to introduce you the main use of transformer bobbins and how we classify them.   In the pictures are the transformer bobbins.        Following are the main uses of that JRPanel has summarized for you:   1. The bobbins provide space for winding copper wires in transformers.   2. Wire channel in the bobbins provides path for transformer winding.   3. The bobbins help to fix the core in the transformers.   4. The metal pins in the bobbins are connected to the  PCB  after soldering, which play an important role in conducting electricity when the transformer is working.   5. The baffle at the bottom of the bobbins isolates the core from the tin stack to avoid poor volta ge resistance.       From this it can be seen that the importance of bobbins in transformer is extraordinary.   After understanding the main uses of transformer bobbins,  JRPanel  is to introduce its common classification methods.   Fi
Post a Comment
Read more