Factors affecting quality of glass steel tank

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Factors affecting quality of glass steel tank

Data: 2017-03-31 11:39:24Click:53次

1, FRP tanks in the winding process of shares by layer

In the winding process, the increase of the fiber number, reduce winding layers, is one of the measures to improve the production efficiency of the container. However, the application must be considered, not the blind pursuit of production efficiency. The increase in number of fibers, cross winding and pole hole at the point of tangency "overhead" phenomenon will be intensified. The pore formation between the fiber and the lining in aerial parts. Container filling pressure, effect of aluminum liner under pressure will be squeezed into the overhead position, seriously affect the fatigue performance of container. The number of shares increased after the longitudinal fiber, winding layers decreased, the number of envelope diameter will decrease, the fiber in the head can not be evenly distributed, causing head strength decreased. Therefore aissue layer reduction measures should be used with caution. Improper use will cause a decline in the quality of products.

2, by decreasing tension system

Winding container is an important prerequisite for the high strength so that each fiber bundle under uniform tension, the vessel under internal pressure at the same time, all fiber stress. If the fiber has a tight song, the filling pressure cannot make all fiber stress at the same time, it will affect the play of fiber strength. The size of the tension but also directly affect the rubber content, the proportion of products and porosity. The tension system is not reasonable will make the occurrence of wrinkles, the inner lining fiber yield, will seriously affect the strength and fatigue performance of container.

The winding tension should be reduced step by step. This is because after wrapping a layer of fibers due to tension will make up the first fiber layer together with the lining with compression deformation, the inner fibers become loose. If the constant tension system, will make the container on the fiber within the tight loose outside, the inside and outside the fiber initial stress has great difference, the container pressure when the fiber can not even force at the same time. Serious person can make the inner fibers produce wrinkles, lined with bubble deformation and yielding state. This will greatly reduce the strength and fatigue performance of container. With the gradually diminishing tension system, although after wrapping fiber on around the fiber is cut, but because of less tension itself, and the first layer is cut after the tension of the same, so you can ensure that all the winding layer from inside to outside have the same deformation and initial tension. Container filling pressure, fiber can force at the same time, the strength of the vessel is improved. The strength of fiber can play better.

3, the layered curing process system

The process method of layered curing is carried out. The glass steel shell inside, first forming a certain thickness, the curing, cooling to room temperature by the surface grinding and wound second times. This analogy, until tied to meet the requirements of strength design layers so far.

Thick wall vessel strength is less than that of thin walled vessel, this fact has been confirmed theoretically. With the increase of container volume, the increase of pressure, the wall thickness increases. Cause the intensity difference of glass steel thick wall vessel with thin wall vessel. In addition to the mechanical analysis of the external causes,

See also the following from the glass container manufacturing angle:

1) with the increase of the thickness of the container, and the quality of nonuniformity is increased;

2) with the vessel wall thickness increased, the number of the layers increases, the requirement of fiber winding tension is more and more small, the whole fiber container in the initial tension is low, which will affect the strength and deformation capacity of container.

In order to effectively play the fiber strength of thick wall vessels, layered curing is one effective way. Container layer curing, like a thick wall vessel into several sets of tightly combination with thin walled vessel. Under internal pressure, they have the same deformation, under the same stress, and between layer and layer constraints, each other can free slip. This will give full play to the superiority of the thin-walled container in terms of strength.

The container is divided into several curing, so the position of fiber in the container can be fixed, does not cause wrinkles and loose fibers, the resin without loss in the interlayer, thereby improving the quality and uniformity of containers.

4, vacuum curing method

Glass steel container heating in vacuum curing, the strength can be improved by more than 10%, vacuum curing is one of the effective ways to improve the strength of vessel. The container in the manufacturing process, there are some residual solvents and other low molecular materials, under normal pressure can not be completely removed, the remaining small molecules attached to the resin! Glass fiber interface, firmly prevent bond resin and glass fiber, thus affecting the strength of the vessel. The vacuum curing method can make low molecular volatile matter more fully, the more dense glass steel. It can improve the strength of the vessel.

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