As a manufacturer, do you know the cause of air bubbles in rubber products?
Various problems are encountered in the daily production process, and air bubbles are a relatively common problem. Some air bubbles are on the surface of rubber products and some are inside, and there are more reasons for them. Edited to tell everyone one by one
The reasons are as follows:
1. The problem of the raw material itself may be caused by poor quality, formula matching problems, or excessive moisture in the material (it can be solved by adding calcium oxide during mixing). It is recommended that the manufacturer eliminate them one by one.
2. Irregular operation leads to insufficient or uneven rubber mixing. This problem can be circumvented by perfecting the work instructions, and perfect and compliant work instructions are the most basic requirements of rubber products manufacturers.
3. For the problem of venting, firstly it is necessary to rule out whether there is an venting process during the processing, and then the problem of the mold itself. If the mold is not equipped with a vent groove, or the vent hole is unreasonably designed, or it is blocked by foreign objects, it is also Will produce bubbles
4. Problems during vulcanization. If the vulcanization time is short and insufficient, the pressure is insufficient during vulcanization, or there are too many impurities in the vulcanizing agent, bubbles will also be generated.
5. The product is too thick, resulting in slower heat transfer of the rubber. In the end, only the outer surface is vulcanized, and the inside is full of bubbles.
Molds used in the production of rubber products
Some other suggestions
1. The injection material speed slows down, and the excessively fast injection material speed during processing is also an important reason for the generation of air bubbles.
2. We know that the bubbles are caused by the entry of air, and the solution is of course to avoid the entry of air, so a more thorough solution is to change the vulcanization molding machine to a vacuum molding machine.