Xinhua Xu Hydraulic O-ring mastication process

Hydraulic elastomer O-ring belongs to the hot melt thermosetting plastics belong hot melt cold curable. Hydraulic rubber O-rings because of different types of sulfide body, its molding curing temperature range, there is a considerable gap, and even may be due to climate change, the impact of indoor temperature and humidity. Therefore, the production conditions of hydraulic rubber O-rings manufactured goods, to be ready to make appropriate adjustments, if not, you may have differences in the quality of products.

Hydraulic O-ring long chain molecules formed by degradation of raw rubber plasticity process is called mastication.

Because raw rubber elasticity, the lack of time necessary for processing plasticity performance, it is not easy to process. In order to increase its plasticity Hydraulic O-ring, so to raw rubber mastication, so that when the kneading ingredients can be uniformly dispersed in raw rubber, while rolling, the molding process also helps to improve penetration of rubber penetrate the fabric fibers and molding flowability.

Hydraulic O-ring raw rubber mastication method of mechanical mastication and thermoplastic refining in two ways:

Mechanical mastication is made without high temperature mechanical pressing and by frictional force mastication machine long-chain rubber molecules degradation shortened by the high elastic state to a plastic state.

Thermoplastic raw rubber mixing is to pass into the hot air under the action of heat and oxygen degradation of long-chain molecules in order to obtain a shorter plasticity.

One is the effect of mechanical damage; the other is the thermal oxidative degradation. Low temperature mastication, due to mechanical damaging effects macromolecular chain scission occurs under strong mechanical forces; high temperature mastication, thermo-oxidative degradation plays a dominant role.

Hydraulic O-ring kneading

Kneading, the rubber is mixed with a variety of ingredients in rubber processing rubber mixing machine.

Hydraulic O-ring in order to adapt to different conditions of use, access to a variety of performance, but also to improve the performance of rubber products, must be added different ingredients in the raw rubber.

Kneading hydraulic O-ring rubber production process an important step, if uneven mixing can not give full play to the role of rubber and compounding agents influence curing properties and product performance.

After kneading the resulting compound is called the mix, it is manufacturing various rubber products, semi-finished materials, commonly known as plastic materials, are usually sold as a commodity, buyers can take advantage of direct molding compound, made of vulcanized needed rubber products.

Hydraulic O-rings depending on the recipe, mix a range of different properties of different brands and varieties of choices.

Hydraulic O-ring rubber molding, pressing after much pressure, it can not be eliminated because of the ready elastomer cohesion during molding from the mold, often have highly unstable contraction (shrinkage of the rubber, because different types of plastic there are differences), after a period of time necessary to stabilize gentle. So, when a rubber products designed from the beginning, regardless of the recipe or mold, are calculated with the need to be cautious, if not, it is easy to produce products dimensionally unstable, resulting in low-quality products.