Butyl rubber has good air tightness, and the rubber inner tube produced has good elasticity, low air permeability, heat resistance and aging resistance. It has replaced natural rubber as the main raw material for producing inner tube; with the continuous popularization of various vehicles, butyl There are more and more inner tube manufacturers and fierce market competition. In the process of competition, the cost and price are increased. Among them, improving the yield of butyl inner tube can greatly reduce unnecessary loss and improve production efficiency. So what are the common problems in the production of butyl inner tubes, and how to avoid them?
1. butyl inner tire wall thickness is uneven
The uneven thickness of the butyl inner tube wall is one of the most common problems in the production of butyl inner tubes, which directly affects the performance and life of the butyl inner tube. The butyl inner tube that has this problem in the production process belongs to the problem inner tube and is directly labeled as “defective product”, causing serious economic losses. There are many reasons for the inconsistent thickness of the butyl inner tube wall: the process of extrusion, shaping, molding, parking and other processes are unreasonable, and the softness and hardness of the rubber compound are inconsistent, which will lead to uneven thickness of the butyl inner tube wall. Paying attention to the following points during the production process can largely avoid this problem:
1 Ensure that the thickness of the butyl inner tube is uniform when extruding; 2 strictly control the inflation speed when setting, avoid the problem of inner tube wall caused by excessive inflation and uneven stretching; 3, under the premise of the process, properly accelerate the mold loading operation when the mold is allowed By reducing the mold clamping time, there is basically no problem that the flowability of the lower mold rubber is faster than that of the upper mold, resulting in stretching and thinning. (The butyl reclaimed rubber has better fluidity than butyl rubber, which can improve the overall fluidity of the rubber compound. 4; reasonable control of the top of the tire parking time, should not be too long; 5 full plasticization, to ensure that the rubber compounding uniform, soft and hard degree is consistent, otherwise the butyl inner tire wall is prone to thin and thick problems.
When butyl reclaimed rubber is used in the inner tube made of butyl rubber to improve the processing performance of the rubber compound and reduce the production cost, the rubber product manufacturer needs to select the reclaimed rubber reasonably, with high elasticity, high fineness and no impurities, and ensure the butyl group. The inner tube is smoothly extruded, and there is no problem of uneven thickness or impurities.
2. Butyl tube joint crack
In the production process of butyl rubber inner tube, the cutter of the joint machine is stuck with impurities or glue, the talc powder or the release agent is stuck at the joint, and the temperature of the electric knife is too high or too low, which may cause the butyl inner tube joint to crack, which directly affects The quality of the finished butyl inner tube. In the actual production process, the butyl inner tube manufacturer must promptly clean all the production equipment including the joint machine, timely repair and maintenance, to avoid the external factors causing the inner tube joint to be contaminated, the joint line is not good, and in the production process Reasonably control the temperature of the electric knife.
There are still many problems in the production process of butyl rubber inner tube. Xiaobian will discuss with you the common problems and solutions in the production of butyl inner tube tomorrow. I will share with you what I have learned, to the maximum extent. Improve the yield of butyl inner tubes and minimize unnecessary losses.