Treatment method for leakage of injection molding machine!

    1. The selection of sealing elements in the planning elements and the reliability of the hydraulic system largely depend on the planning of the sealing of the hydraulic system and the selection of sealing elements. Due to the unreasonable selection of sealing structure in the planning, the selection of sealing elements does not meet the standards, and the compatible type, load condition, limit pressure, operation speed, etc. of hydraulic oil and sealing materials are not considered in the planning Changes in ambient temperature, etc. These constitute the hydraulic system directly or indirectly at different levels. Due to the dust and impurities in the application environment of the injection molding machine, appropriate dust seals shall be selected in the planning to prevent dirt such as dust from entering the system, damaging the seal and polluting the oil, and then leaking. Other planning reasons: in the planning, it is considered that the accuracy and roughness of the moving surface are not comprehensive enough, and the strength check of the connecting parts is not stopped in the planning, which will be revealed in the mechanical operation.

    2 manufacturing and device elements manufacturing elements: all hydraulic components and sealing components have strict requirements for dimensional tolerance, surface treatment, surface brightness, geometric tolerance and so on. If it is out of tolerance in the manufacturing process, such as the piston radius of the oil cylinder, the depth or width of the sealing groove, the size of the hole with the sealing ring is out of tolerance, or it is out of roundness due to processing problems, burr or depression, chromium plating falling, etc., the seal will be deformed, scratched, crushed or not pressed, so that it will lose its sealing function. It will make the parts have congenital leakage points, and leakage will occur after the device or during operation. Device elements: rough operation of hydraulic components in the device shall be avoided. It is assumed that excessive force will deform the parts, especially hitting the cylinder block and sealing flange with copper rod. The parts shall be carefully checked before the device. When the device is installed, the parts shall be dipped in a little hydraulic oil and pressed in quietly. During cleaning, diesel oil shall be used, especially rubber components such as sealing ring, dust ring and O-ring. If gasoline is used, it will be easy to age and lose its original elasticity, and then lose its sealing function.

    3. Oil pollution and damage of parts gas pollution under atmospheric pressure, about 10% air can be dissolved in the hydraulic oil. Under the high pressure of the hydraulic system, more air or gas will be dissolved in the oil. Air forms bubbles in the oil. Assuming that the pressure of the hydraulic support changes rapidly between the upper and lower pressure in a very short time during the operation, the bubbles will burst at the high pressure side, and the high temperature will burst at the low pressure side. Assuming that there are pits and damages on the component surface of the hydraulic system, the hydraulic oil will rush to the component surface at high speed, accelerate the wear of the surface and cause leakage. As the primary executive element of the hydraulic system of some injection molding machines, the particle contaminated hydraulic cylinder is exposed to the outside and directly touches the environment during operation. Although the guide sleeve is equipped with dust rings and seals, it is inevitable to bring dust and dirt into the hydraulic system, accelerate the scratch and wear of seals and piston rods, and then cause leakage, Particle contamination is one of the fastest damage factors of hydraulic components. Water pollution may cause water to enter the hydraulic system due to the influence of wet working environment and other factors. Water will react with hydraulic oil to form acidic substances and oil sludge, reduce the smooth performance of hydraulic oil and accelerate the wear of components. Water will also form the valve stem of the control valve to bond, making it difficult for the control valve to scratch the seals, forming a leakage.

    4 parts damage seals are made of oil resistant rubber and other materials. Due to long-term use, aging, cracking and damage will cause system damage. It is assumed that the parts are damaged by bumping during operation, which will scratch the sealing elements, and then form a leak. The disclosure of the primary prevention and control countermeasures constitutes the disclosure of the hydraulic system of the injection molding machine, which is the result of many aspects. With the existing technology and materials, it is difficult to basically eliminate the disclosure of the hydraulic system of the injection molding machine. As long as you start from the above factors affecting the hydraulic system disclosure, take reasonable measures to minimize the hydraulic system disclosure. In the planning and processing links, we should fully consider the planning and processing of sealing grooves, which are important factors affecting the disclosure. In addition, the choice of seals is also very important. If we don't start to comprehensively consider the influencing factors disclosed, it will bring immeasurable losses to future consumption. Choose the right device and repair method to create your own experience. For example, select special tools as far as possible in the sealing ring device, and apply some smooth grease on the sealing ring. In the pollution control of hydraulic oil, we should start from the source of pollution, enhance the control of pollution source, and adopt effective filtering measures and regular oil quality inspection. In order to effectively cut off the pollution of external factors (water, dust, particles, etc.) to the hydraulic cylinder, some protective measures can be added. In short, the disclosed prevention and control should be carried out in an all-round way and can be effective only after thinking.