冷胶和热胶大的区别就是热胶是可逆的，就像水能变成冰，冰又回到水。热胶固化后把灯放到烘箱120度烘烤，胶水基本就软了。冷胶不可逆，就像鸡蛋煮熟后永远变不回去。

The big difference between cold glue and hot glue is that hot glue is reversible, just as water can turn into ice, and ice returns to water. After the hot glue is cured, put the lamp in the oven for 120 degrees to bake, and the glue is basically soft. Cold glue is irreversible, just like an egg that never changes after it is cooked.

每个大灯的结构都不同，采用的灯泡功率也不太一样，有的灯内温度高，有的温度低一点。一般设计的时候根据灯内的温度车厂胶水的种类由主机厂来决定胶水。热胶的稳定性比较好，气密性能较好， 冷却固化时间基本在3分钟左右，冷胶基本要24小时以上。且冷胶都要进行等离子预处理，多道工艺，气密性能比较难保证。

The structure of each headlamp is different, and the bulb power used is also different. Some lamps have a high temperature, and some have a low temperature. In general, the type of glue recommended by the vehicle manufacturer is determined by the main engine manufacturer according to the temperature in the lamp. The hot adhesive has good stability and air tightness. The cooling and curing time is basically about 3 minutes, and the cold adhesive is basically more than 24 hours. In addition, the cold adhesive shall be subject to plasma pretreatment, and the multi-channel process makes it difficult to ensure the air tightness.

现今大多数车辆的大灯都是热胶的，因为这样的大灯生产成本低，且技术成熟。也有少部分是冷胶的，因为冷胶的大灯生产成本相对较高，而且工序复杂，大灯的气密性也低。

Nowadays, the headlights of most vehicles are hot glue, because the production cost of such headlights is low and the technology is mature. A few of them are cold glue, because the production cost of cold glue headlamp is relatively high, and the process is complex, and the air tightness of headlamp is also low.

此外大灯冷胶开壳的注意事项：

In addition, precautions for headlight cold glue shell opening:

注意事项一：冷胶其实也有它的弱点，冷胶必须要加热到一定温度。

Note 1: cold glue also has its weakness. Cold glue must be heated to a certain temperature.

注意事项二：不要局部加热，要用烤箱整体加热。

Note 2: do not heat locally, but use the oven as a whole.

注意事项三：只加热一次远远不够，少要反复加热到3-5次以上。

Note 3: heating only once is not enough. At least repeat heating for more than 3-5 times.

注意事项四：每次的加热时间不能太短，要把冷胶热透，冷胶和灯槽之间的附着力就会大大降低。

Note 4: the heating time should not be too short. Heat the cold glue thoroughly, and the adhesion between the cold glue and the lamp slot will be greatly reduced.

注意事项五：汽车车灯冷胶机厂家认为拆冷胶的大灯没有什么特别的工具，主要靠的是耐心和细心。

Note 5: the manufacturer of automobile lamp glue cooler thinks that there is no special tool for removing the headlamp glue cooler, which mainly depends on patience and care.

以上就是问题解答的相关内容了，希望能够帮助到大家，如对这一问题还存在任何疑问，都欢迎关注我们网站http://www.jntiannuo.com并咨询我们的工作人员，将竭诚为您服务。

The above is the relevant content of the question answer. I hope it can help you. If you still have any questions about this problem, you are welcome to follow our website http://www.jntiannuo.com And consult our staff, will serve you wholeheartedly.