Production process for rubber diaphragm of IC intelligent instrument closed chamber

Abstract

The invention discloses a production process for a rubber diaphragm of an IC (integrated circuit) intelligent instrument closed chamber. The production process adopts the scheme that: a cloth piece and a rubber piece are prepared; the cloth piece is cut in an enlarging manner according to the maximum size of a product and is shaped through thermal contraction in a set temperature for a set time period, and then is immersed in anhydrous ethyl alcohol, dried through a drying oven, and smeared with gluewater in dilute concentration; the rubber piece adopts butadiene-acrylonitrile rubber for mixing to manufacture rubber binding which is placed for set time, then punching and metering are carried out, and the set requirements of size and weight are met; then shaping is performed, a lower piece of the rubber piece is put in a cavity of a die on a vulcanizer at first and covered with the cloth piece coated with gluewater, a ring sleeve is closed for positioning, the cloth piece is guaranteed to be in the center, and then an upper shaping die is closed for shaping; the upper shaping die is demounted after shaping and an upper piece of the rubber piece is put in, an upper vulcanization die is closed, the vulcanization is carried out under a vulcanization temperature from 165 to 175 DEG C, a vulcanization pressure from 13 to 15Mpa, and a vulcanization time from 3.5 to 4.5 Mins, required automatic deflation is 2 to 3 times during the vulcanization, and the upper piece is pushed out from a hot plate center finally, the upper vulcanization die is dismounted, the product is taken out, and circulation operation can be carried out in this way; and the cooled product is trimmed to obtain the rubber diaphragm. The rubber diaphragm can be switched on and off for 3500 times under the maximal hydraulic pressure of 1Mpa without breakage and leakage, so that the technical requirements of the product are met, the product qualification rate is improved, and the product cost is lowered.

Description

technical field [0001] The invention relates to a production process of a film, in particular to a production process of a rubber film in an IC intelligent instrument chamber. Background technique [0002] The rubber film of the IC smart instrument chamber is an important part of controlling the water flow switch with the IC as the information carrier. The realization of the switch function is to control the solenoid valve through the IC card, and the solenoid valve pushes and controls to realize the purpose of opening or closing the water flow of the membrane. The performance of this product requires that at an ambient temperature of 5-50°C, when the water source pressure is 1.0 MPa, the switching action is required to reach 3000 times without deformation of the film, no damage, leakage, leakage and damage, so the rubber film is an IC smart instrument. The core key parts of the secret room are related to the switch performance of the instrument. The quality index of the f...

AI Technical Summary

Problems solved by technology

The quality index of the finished rubber film is closely related to the manufacturing process. According to the original manufacturing practice, there are many shortcomings, such as no strict material preparation requirements, eccentricity of the cloth, the concentration standard of glue, and the adhesion between the cloth and the film. Problems, etc., because the above-mentioned problems are not strictly checked, resulting in a very low product qualification rate and a sharp increase in waste and defective products, which increases the production cost of the enterprise and reduces the product performance level