How to choose a high-quality screen changer

screen changer products all have optimized flow channel design, so that the extruder can be completely replaced without stopping and leaking, and the defects of the product caused by bubbles in the process of changing the screen can be completely avoided. How to choose a high-quality screen changer is mainly compared from the following five aspects.
1. Design
The appearance of the screen changer looks similar, but the internal design is different. The big difference lies in the different sealing methods. At present, the reliable sealing method is the hard sealing method with gap matching. At that time, the technical content of this method was that there must be a gap for pushing and pulling activities to change the screen, and at the same time, there must be no leakage. There are not many screen changer manufacturers on the market that can do this. Another sealing method is through soft sealing, that is, using materials with different hardness for sealing. This kind of screen changer causes the wear of the softer sealing material when pushing and pulling under high-pressure production conditions, and the gap will increase. It is inevitable that leakage will occur. Some will leak when installed, and some will leak after a short period of production. Therefore, the difference between good and bad can be distinguished in design.
2. Material
The key components of high-quality screen changers are made of special alloy steel. After the corresponding heat treatment, the surface hardness reaches a reasonable height, so the friction of the hard seal ensures the matching accuracy of the gap. The hardness of ordinary steel is not enough, and the push and pull will cause strain and leakage. At the same time, the material of the screen changer connection body will also be different, such as forging parts, steel parts, and castings, which will naturally be reflected in the price and quality.
3. Processing technology
In order to ensure the surface hardness of the key components of the screen changer, the corresponding processing technology must be carried out. Simply processing into machined parts with the same appearance cannot guarantee the quality of the screen changer. Even if there is a relevant processing technology, the difference in process mode and process time will also cause the quality of the screen changer to be different, which is also the difference in the quality of the screen changer on the market.
4. Assembly
Professional screen changer manufacturers have accumulated and rich experience in assembly. It is precisely because of the difference between professionals and non-professionals and the different mastery of core technologies that the essential difference between screen changers is leakage or not.
5. Price
I believe that the first question everyone asks when consulting a screen changer is: How much does a screen changer cost? The cost of mechanical processing is transparent and can be calculated. How can you guarantee the quality of the screen changer when you blindly pursue low prices? The necessary business behavior is not to do Leifeng. A low-priced screen changer must be a low-quality screen changer. Of course, a high-priced screen changer is not necessarily a high-quality screen changer. What is certain is that a high-quality screen changer is definitely not a very cheap screen changer.