General Production Process of Polyresin

In the production process of resin handicrafts, there will be many small holes under the surface of some products, and some liquid will flow out when you pierce it with a needle, which is called oil holes. A very small hole in which there is some liquid, which is called a pinhole.

Both pinholes and oil holes are produced by chemical thinners, and oil holes often appear when these materials are fused together. If the oil and thinner are relatively small and not fused together, pinholes will occur. This problem usually occurs in the second half of the year. After the slurry is mixed, stratification will occur. There are several ways to solve this problem:

1. Before the production of collar pulp, the amount of oil involved should be controlled, and then used after uniform mixing.

2. In the process of production, use some resin raw materials with relatively high concentration, in order to reduce the layering of slurry water when stone powder is added.

3. Pay attention to the humidity when filling the stone powder, because too much water will cause stratification.

4. It is necessary to strictly control the amount of oil involved. In the environment that does not affect the spraying, less oil should be added. The amount of oil involved should not exceed 5/1000, and the less the better.

In the production of resin handicrafts, for products with very complex structures and too small, pores are most likely to appear at corners with high hollow resistance such as corners, and some pores even expose the surface of resin products. To solve these problems, some resins Handicraft manufacturers use the following methods:

1. In the process of fine and complex mold design, the problem of air holes should be considered, and the design should be divided into parts, and air vents should be added at the corners, so as to facilitate the evacuation effect and reduce the probability of air holes.

2. Use less white and red raw materials as much as possible, so that the solidification time of the resin handicraft can be increased a little, in order to save enough time to extract the air in the mold.

3. Check whether there is any mechanical failure in the vacuum extractor. It is necessary to ensure that the evacuation speed of the resin handicraft in the vacuum box reaches 0.2Mpa quickly, so that the vacuum can be handled well. The product is to take the vacuum degree to reach 0.2Mpa and then reduce it to 0.08Mpa, and then return to 0.1Mpa. This kind of vacuuming effect is also very good.

4. Use some thin resin raw materials or fill less fillers to make thinner slurry raw materials, so that the air in the mold can be extracted cleanly when pumping air, and no air bubbles will appear on the surface of the product.