Impregnation Adhesive
Summary
Regarding the die casting and powder metallurgy parts manufacturing process, as a result of residual gas, crystal contraction and other reasons, the inevitable formation of a large number of micro - hole, trachoma, cracks, and micro porous leaks bring about operation problems for parts in machinery and equipment.
Plating, painting and other surface treatments cause internal corrosion of internal components and shorten the life of parts. The painting and electroplating of micro porous surfaces also causes the formation of air bubbles or uneven surfaces.
The original impregnation technique is to put the leaking casting parts into the vacuum tank, and then vacuum the air from the inside to the outside. Pressure is added and siphon principles are applied to force the impregnation sealant into the micro-holes. Then the parts are heat-cured successfully, permanently sealing the porous areas.
Impregnation Sealant Classification Introduction:
1. Inorganic Impregnation Sealant Material
Fifty years ago, inorganic impregnation sealant material was used due to dehydration after the repeated volume contraction of about 30-40%.
Resin was brittle after drying and easily came off, there was poor reliability and a low passing rate for impregnated pieces, spare parts were difficult to clean, and surface residue pollution became a problem.
Impregnation continued unchanged for a long time. The process included curing at a temperature of 200℃ and above, but the temperature requirements have gradually changed over time.
2. Synthetic Resin
Synthetic resin has a good sealing effect and a better resistance to dielectric properties. However, the process is more complex and much more time consuming. It is difficult to clean residues, including solvents and hazardous ingredients. And there are health hazards for the operators and more pollution of the environment. In industrialized countries the use of synthetic resin has virtually ceased.
3. Heat-Curable Organic Extract
Over the last decade, vacuum impregnation sealant curing has been the long-term solution solving technical problems in the impregnation industry.
Characteristics:
a. impregnation time - curing time is short
b. parts are easy to clean, non-contaminated surface for machining and processing of holes/screw holes
c. impregnation passing rate of 95%
d. after impregnation there are no leakage problems, and the life of the parts is preserved
e. integrated low-cost – treated parts per ton contain about 4 kg
f. after curing, parts are subject to temperatures of -55 ℃ ~ + 200 ℃
Hot Water Curing Advantages:
1. The process is simple and efficient. The impregnation process is completed in a hort period of time with a very high passing rate of the work piece.
2. There is a 100% curing rate of resilient material and resistance to fine chemicals. The resin can seal micro porous work pieces with an ultra fine surface.
3. The process does not affect the accuracy of the work piece surface. The environment for operators is completely safe.
4. Parts are impregnated after machining, and due to the lubrication, high speed cutting can be applied to thermoset plastics. The life of the tool is greatly extended, reducing processing costs immensely.
5. The inorganic sodium silicate and synthetic resin materials contain only a fraction of the extract. There is a considerable cost reduction as there are less scrapped castings and the improved efficiency and adds cost savings in terms of working hours.
Overall, the impregnation process greatly reduces the cost for manufacturing.
Storage:
1. Place in a cool dry place at room temperature and store in sealed original packaging. Storage period may be more than a year.
2. Packaging specifications: 20kg / barrel and 200kg / barrel. In order to prevent pollution, the packaging for the original impregnation fluid can not be used for other types of fluids.
Notes:
1. If this extract comes in contact with the eyes, one must immediately flush the eyes with water and seek medical treatment.
2. Long-term exposure to the extract requires one to wear rubber gloves.
Organic Adhesive Impregnation With Hot Water Curing
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