最近,在国外的一些汽车发动机上出现了一种由兰色带状压层塑料制成的气缸垫。这种气缸垫具有最小的松驰和最少的扭矩损失,因而具有良好的密封性和扭矩保持性。由于这些特点,就免除了修理工去检查缸盖紧固螺栓的扭矩值是否还保持在原来的范围之内和重新把它们拧紧到规定值这类费时的操作了。因为在缸垫的主要表面上涂了一层优质材料,所以保证了它的紧凑性和长期密封性,在次要表面涂了一层特氟隆塑料,既能保护这些表面不遭损坏,又能使已有的表 Recently, there have been some cylinder cushions made of blue ribbon laminated plastic on some automobile engines abroad. This cylinder liner has the least slack and the least torque loss, thus having good tightness and torque retention. Because of these features, the time-consuming operation of the mechanics to check whether the torque value of the cylinder head fastening bolts remains within the original range and re-tighten them to the specified value is eliminated. Because the main surface of the cylinder pad coated with a layer of high quality materials, so to ensure its compactness and long-term sealing, the secondary surface coated with a layer of Teflon plastic, both to protect these surfaces from damage, and Can make existing table