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The production process of excellent automobile shock absorber oil seal generally consists of the following six industrial links: rubber preparation section, mold preparation section, skeleton preparation section; spring preparation section, product vulcanization molding section, post-processing and assembly section. Therefore, the basic composition of its technological process.
In the production of seals, most of the manual labor increases the cost of two main processes: 1. Vulcanization; 2. Testing.
1. Preparation of rubber
The main process of this section is as follows:
Raw material-human factory inspection-ingredients-hybrid-filtration-adding sulfur-glue inspection-pre-forming formation according to the above process, the raw materials can be mixed after passing the inspection of the human factory. When mixed, you can choose a refiner or a dense refining machine according to the needs of production. Generally, mixing glue is filtered. In order to prevent the coating of the rubber, the vulcanizer is added after the glue is filtered. This is the so -called two -section method mixed. In fact, some manufacturers adopt a section of method mixed in production, and all the cooperative agents are added before filtering. When filtering, controlling process conditions or considering the prevention of scorching in the formula. This method also has certain advantages, mainly to simplify the process and reduce the possibility of secondary pollution of rubber. It should be emphasized that the inspection of rubber is an important process in the oil seal production process, and it is also one of the main means to control the quality of the oil seal. In addition, the pre -forming type of rubber is also a key process for oil seal production technology. The traditional process method is to prepare the glue to make a certain thickness film on the refiner, and then cut it into a semi -finished product with a certain shape and weight according to the requirements. At present, professional oil seal manufacturers use precision pre -molded machines directly. Compared with traditional methods. Its efficiency is high. The shape and weight control of semi -finished finished finished fins are accurate
2. The preparation of the mold
The oil seal mold is the same as the processing and processing process of other rubber sealing molds. Generally, forging should be performed to eliminate its internal stress, and then mass adjustment and thermal treatment. Such as surface nitride or hard chromium.
3. Something preparation work section
The skeleton preparation section includes skeleton stamping and skeleton surface treatment. The skeleton stamping is generally stammered. Multi -stage stamping on the external skeleton and combined skeleton must be used. Sometimes it is necessary to perform refined processing.
The surface treatment of the skeleton is mainly to make the metal skeleton bond well with rubber. The commonly used methods are nothing more than the following:
① Remove oil (alkali treatment) -dry sand spraying -cleaning -dry -adhesives;
② Wet sandblasting -cleaning -drying -glue adhesive;
③ Skin, remove oil -pickled -phosphorization -glue adhesive.
Traditional craftsmanship is step -by -step operation. Except for sandblasting machines as standard equipment, other devices are non -standard equipment. In recent years, many domestic manufacturers have set up skeleton processing continuous production lines, such as wet sandblasting devices, pickling, phosphorurative production lines, etc. Disasters, phosphates, acid washing, and adhesives used in the surface treatment of the skeleton are sold in China. They can be purchased directly as needed during use.
4. Spring preparation work section
The oil seal spring is made of the wire on the winding machine. The spring steel wire is in different positions, and its deformation is not consistent. The external stretch. The internal pressure port, that is, the steel wire has a certain deformation stress, resulting in unstable size of the spring, and the elasticity difference is large. Therefore, the winding spring needs to be treated. The method of heat treatment is to heat and immerse the winding spring in oil (anti -rust oil or cylinder oil, etc.), stress recovery and rust -proof treatment port
5. Product vulcanization into a type
Sollet oil seal vulcanization equipment usually includes ordinary tablet vulcanizers, vacuum automatic plate sulfur sulfur, and rubber prescription machines. The conditions of vulcanization and molding in actual production are different due to product specifications, rubber, etc. At present, the production plant is pursuing the premise of ensuring the quality of the product.
6. Post -processing assembly section
The sulfurized oil seal needs to be trimmed by a glue. Especially the lip mouth of the oil seal is the key part of the product performance and service life, and it often needs to be trimmed. According to the structure of the oil seal mold, the main lips often have several structures shown in the figure below: that is, full lip mouth (full cut], local lip (half -cut), mold pressing lip mouth. For implementation, the product can be trimmed by the bordering method. Full -cut and half -cut lip mouth products need to be repaired by the edge repair machine (incision machine). The incision machine has standard equipment at home and abroad. The deduction is generally carried out on non -dedicated tooling equipment. As the last process of oil seal production, it is the installation spring. Most domestic manufacturers are manual operation, but some manufacturers also introduce foreign automatic reeds.
