Infiltration equipment company analysis: why the casting should be infiltrated

The infiltration treatment method can be divided into two categories: partial impregnation and integral infiltration according to the specific conditions of casting defects, distribution, casting working conditions, structural size and type of infiltrant.

The partial infiltration methods include brush coating, injection, dip coating and partial pressure infiltration, which are suitable for castings with known leaks. The method has the advantages of simple process, convenient operation and less consumption of the infiltrant, and is mostly used for castings of large castings or single pieces. The whole infiltration method includes atmospheric pressure infiltration, pressure infiltration, vacuum infiltration and vacuum pressure infiltration, and is used for small and medium-sized castings for mass production.

The castings are impregnated and the quality of the products is guaranteed to avoid being returned due to leaks. The cost of infiltration processing is only a small fraction of remelting, recasting and other costs. It also saves energy and time spent on recasting and processing, and even recast products have the potential to leak. With the pressure test, it is impossible to completely find out whether there is a leak. Even if the original pressure test is qualified, it may be caused by subsequent machining or slight corrosion inside the workpiece, so the pressure test cannot be completely completed. Infer whether the workpiece is dangerous in the future.

On the other hand, the implementation of surface pretreatment such as electroplating and painting cannot completely prevent the occurrence of non-performing rate, and may be a perfect finished product at the completion of electroplating, but perhaps after a period of time, when the product is delivered to the customer, the casting has spit. The phenomenon of acid, the product will become a defective product. These are very realistic situations. Usually castings need to be machined and then used. When machining castings, machining usually opens up internal pores, sometimes because of machining vibrations or heating shocks. These pores may also penetrate, so that micropores need Infiltration processing, so usually after the machining process, the infiltration treatment mixer emulsifier automatic revolving door disperser mixer mixer emulsifier revolving door crane mixing equipment static mixer laser marking tank purification air conditioning. Gray cast iron, non-ferrous materials, aluminum-magnesium alloys, sintered parts, brazed/welded components, etc. can be processed by the impregnation apparatus.

Infiltration equipment Infiltration agents, both inorganic and organic, must have good permeability and adhesion.

The inorganic infiltrant is mainly composed of silicate type, and the main component is sodium silicate (commonly known as water glass). The biggest feature is the high temperature resistance of 500 ° C, and the material cost is low. Disadvantages are high viscosity, poor permeability, and low impregnation efficiency. The infiltrant has better impregnation effect on castings with larger pore defects, but is not suitable for castings with small pores and high density, and is not suitable for large batch processing.

Organic infiltrants include anaerobic adhesives, polyester compounds, heat-curing methacrylates, and the like. The utility model has the advantages of small viscosity, strong permeability, high efficiency and good treatment effect. The disadvantage is that the temperature resistance is lower than 200 ° C, and the price is expensive.

The heat-curing methacrylate impregnating material must have good properties, including low viscosity, good fluidity, good cleaning performance, good curability, excellent thermal stability, physical and chemical resistance, environmental protection and the like.