Five quality control points of gasket for plate heat exchanger

1, closed or open mixing machine for mixing. The ingredients are mixed evenly according to the formula, and the mixing of the mixture is called the raw material with accurate quantity. After the laboratory test, the mixture is used for the production of the gasket of the plate heat exchanger.

2, the extruder can be made into the corresponding plastic blank - cylindrical rubber strip. Plastic blank: because of plate heat exchanger gasket cross-sectional area and length of different.

The cavity 3, is an unvulcanized rubber strip of semi-finished products into the hot mold, molding plate heat exchanger: plate heat exchanger gasket is manufactured by the press molding method. The mold is closed for curing, molding temperature is 160185 DEG C, 315min, rubber products for different species vary mixing, molding pressure should not be less than 9.8MPa.

4, vulcanization in the molding process is not complete, after vulcanization in order to improve the production line of the production capacity. The molded vulcanized plate heat exchanger gasket static state in the oven in the final completion of vulcanization. The degree of the oven must be uniform, and its holding time varies depending on the mixture. Vulcanization is one of the most important steps in the production process of plate gasket. The oven must be fitted with a continuous temperature recording device.

5, the finished product inspection from each oven to extract the finished plate heat exchanger gasket in the laboratory in accordance with the finished product standards for testing.

Plate heat exchanger gasket is made of rubber material. The determination of the shrinkage of rubber is critical to the design of the whole die. But the rubber shrinkage rate is a variable, rubber of different shrinkage range is different, even the same kind of rubber material, by rubber hardness, curing temperature, curing time and pressure as well as the product size effect, value of rubber shrinkage is not the same. Therefore, in the design of the mold, according to the working conditions of the gasket to determine the applicable and economic rubber materials, and then according to the size of the product and curing conditions to determine the shrinkage of rubber. In the case of the conditions permit, you can choose to use a set of materials to produce a sample size and the size of the gasket, measuring its shrinkage, check the shrinkage rate is correct, in order to ensure the accuracy of product size.