Rubber seals are widely used passenger cars, and the traditional main materials are rubber and PVC plastics. As the main raw material of rubber sealing strip, chloroprene rubber, ethylene propylene rubber and other rubber can be used. Ethylene propylene rubber (EPDM) has been widely used as the main raw material for sealing strip because of its excellent weather resistance and so on.
As a part of the auxiliary system of passenger car body, the sealing strip system takes part in the interior and exterior decoration system of passenger car, so the sealing strip has dual functions of function and decoration.
Generally speaking, the sealing strip system has the following functions:
1) filling gap;
2) absorb and reduce vibration;
3) isolating noise, preventing water, dust and so on;
4) mobile parts provide mobile channels;
5) make up for the errors in sheet metal manufacturing and assembly;
6) reduce wind and rain noise, etc..
As a visible part, the sealing strip system also has decorative function, forming a coordinated and unified interior decoration main body
The types of automobile sealing strip
Automobile seals can be classified according to different classification standards:
1) use partial classification;
2) classification of stress changes in use;
3) classification of material composition;
4) structure classification of sealing strip;
Classification according to the site of use
Sealing strips in engine compartment:
1) engine cover seal;
2) radiator seal strip;
3) fender strip;
4) sealing strip for rear cover;
Common sealing strip for car body parts:
1) front window seal;
2) skylight seal strip;
3) body water retaining sealing strip;
4) rear window seal;
5) door frame sealing strip;
6) door seal strip;
7) side window sealing strip;
The common sealing strip at the door:
1) the upper sealing strip of the door;
2) glass guide groove sealing strip;
4) door inner sealing strip;
5) door side seal
6) middle column sealing strip;
7) door protection strip;
The common sealing strip of luggage and tailgate:
1) luggage compartment sealing strip;
2) tailgate seal;
3) seals for doors and windows;
Sectional structure and part structure of pure rubber sealing strip
Pure rubber seals do not contain metal support frames. It consists of different density or different hardness of the main structure of the material, and can be attached to the installation of positioning parts, or surface modification to achieve functional requirements.
The front cover seal, seal, seal and front and rear wind window seal is the most common typical pure rubber sealing strip.
The front cover is usually made of a foam rubber tube and is perforated at the bottom to support the plastic studs for the auxiliary installation. The bottom material can also be a dense rubber.
The interface structure and change the seal is somewhat similar, he also has a bubble tube, has a hole at the bottom, to carry the auxiliary installation with plastic bubble nail, lip length and shape specific, to match with the car door sheet.
The front and rear wind window seals usually do not contain foam tubes, usually carrying glass in a specific shape, and are inlaid with the sheet metal of the body.
The duct seal provides guidance and support for the movement of the window glass, which can be composed of a single hardness or a variety of hardness.
Section and part structure of skeleton sealing strip
The skeleton seal, forming a mounting clamp structure of a typical seal "door seal", "trunk seal", etc., and medial lateral seal of the coating on the metal skeleton by bending forming process, forming a set shape, as the main material attached to the rubber skeleton, the tooth the specific location in the body shape, sheet metal.
Three. Production process of rubber sealing strip for passenger car
It is a complicated process to produce the seal strip for passenger car. It not only has the similar process characteristics of material processing, but also has the steps of discrete processing. There are mechanical changes, and chemical effects are used. In addition to the basic rubber production process, the use of metal cold work, welding, surface treatment and other means of processing.
In general, the manufacturing process of passenger car sealing strip includes three steps: rubber preparation, extrusion vulcanization and post processing.
To sum up, the extrusion process of rubber seals for passenger cars is very complicated and precise. After the extrusion process, the sealing strip will enter the processing stage. Compared with the extrusion curing process, the post processing process is more characteristic of process technology, and it is a typical discrete machining process.