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The key steps to produce epoxy resin rod
2020-02-20

Epoxy rod is an insulating rod material with high mechanical strength, good temperature resistance, stain resistance and corrosion resistance. How is it produced? There are mainly the following steps.

1.Calculation of the blanks

The preparation of the laminated rod is the key. To control the blanking according to the diameter and length of the laminated rod, we should also pay attention to the three major values of the prepreg. Because the blanking amount is too large, the stamper cannot be pressed, which causes the diameter of the stick to be too poor, and the die is too small to cause the density of the stick to be low, or even the lack of material, which directly affects the mechanical and dielectric properties. If the soluble resin content of the prepreg is too large, the glue flow will be large; if it is too small, the laminated rod will have holes. These factors directly affect the mechanical and dielectric properties of laminated rods, so they should be accurately cut. The density of the finished product is about 1.8 ~ 1.9g / cm3. Epoxy glass cloth prepreg usually uses 0.1mm alkali-free glass cloth, impregnated with epoxy phenolic resin, the resin content of the prepreg is 35% ~ 40%, the soluble resin content is 90% or more, and the volatile content is less than or equal 1%.

2. The roll process

Put the prepreg on a hot plate at 35 ~ 40 ℃, and manually roll the material into a small core, and roll it as tightly as possible without creasing. When rolled to a certain diameter, place it one by one in the rolling machine 1 ~ 2 times. For the core with a diameter of 25 ~ 30mm, roll the solid core on the roll machine with a layer of glass cloth pre-impregnated material to make a blank, and then flatten it. For the core of 35 ~ 60mm, it should be rolled on a roll machine and then rolled into several layers of glass cloth prepreg, and then rolled into 1-2 layers of glass cloth prepreg, and then pressed.

3. Preheating of blanks

Preheating blanks with a diameter greater than 30mm are preheated in an oven at 100 ~ 110 ℃ for 20 ~ 40min to remove volatiles.

4. The pressing of the laminating rod

Clean up the mold, evenly apply the release agent, wrap the blank with a layer of surface adhesive tape and put it into the corresponding mold hole, and then close the mold before pressing.

Although it seems relatively simple, in actual operation, it is calculated through strict formulas. And it's all done by skilled workers. The quality of the epoxy rods produced in this way can meet the needs of customers.

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