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There are two characteristics of cracks in this productIn the aluminum casting process, the molten metal is poured into the prepared mold, and the required shape and functional parts are made during the cooling process. During operation, machining operations can be reduced, but a small amount of machining allowance is left on parts that require higher parts. In addition, the shell is made of a high-temperature-resistant special adhesive and a refractory coating made of refractory materials and coated on the investment mold. Aluminum casting occupies a large proportion in mechanical production, such as machine tools and cars.

Therefore, the surface finish of investment castings is higher than that of general castings. Aluminum casting has made progress in the requirements of casting quality, casting precision, casting cost and casting automation. When restricting the investment mold, choose a pressure type with a high surface finish of the cavity, so the surface finish of the investment mold is also relatively high. It is widely used due to low cost and large process flexibility. However, even some castings only leave a grinding and polishing allowance, and can be used without machining. Casting skills are developing in the direction of refinement, large-scale, high-quality, automation and cleanliness.. Casting is a commonly used production method in the aluminum casting process.

The primary variety of aluminum casting The primary process of aluminum casting includes: metal smelting, model making, pouring and coagulation and demoulding finishing. Casting skills, special casting skills, casting automation and Torque Converter Housing Foundry casting moulding imitating skills have developed rapidly. The inner surface of the cavity that directly touches the molten metal has a high smoothness. It can be seen that the choice of investment casting method can save a lot of machine tool equipment and processing man-hours, and greatly save metal raw materials.

Aluminum casting process can be divided into sand casting process and special casting process. Large castings with messy shapes can be produced through the process. The primary materials for casting are cast steel, cast iron, cast non-ferrous alloys (copper, aluminum, zinc, lead, etc.). , Tractors and other products are an indispensable process. The major advantage of aluminum casting during use is that investment castings have high dimensional accuracy and surface finish

At the same time, you should also check whether the tires are scratched, because the rubber tires simply harden in autumn and winter and appear brittle.Auto Parts-In order to make the car pass the winter safely, the work to be done is not only to send the car to the 4s shop, to replace the three filters, oil, antifreeze, and check the battery. auto parts-engine compartment In winter, you should always check the engine oil, brake fluid and antifreeze fluid in the engine compartment to see if the fluid is sufficient, if it has deteriorated, and if it has reached the replacement cycle.

It should be said that There are no less than a hundred pieces of work done, and among them, you should never forget 5 at least. When winter comes, you are best to do a series of detailed cleaning, polishing, waxing, sealing (coating) and other cosmetic maintenance for the exterior of the car. Guangxi auto parts-car paint maintenance There is a lot of dew in the early moing in winter, and the exterior of the car is usually very humid. In addition, we must punctually sort out the inclusions in the tread patte.

The tires are easy to leak, which is a puncture. In winter, because the temperature is relatively low, the tires have to compensate for the air pressure to keep it at a regular pressure scale. These oils are like the blood of your car. 1. If there is a problem, deal with it in time, otherwise, it will Your driving brings unsafe factors. Guangxi auto parts-defrost air outlet Frost will appear when the temperature is low in winter.

At this moment, you should pay special attention to whether the wind from the defrosting vent under the windshield is normal and whether the heat reaches the defrosting specification. If there are significant scratches on the exterior of the car, it should Nonferrous casting be painted in time to avoid moisture and corrosion of the scratched parts. In addition, the paint surface will inevitably be oxidized after the car is eroded by rain and direct sunlight.. In summer, due to the high temperature, you should always check the tire pressure, and you must not make the tire pressure too high, otherwise, there will be a risk of puncture.

Tire maintenance The tire is the 'foot' of the car, and it plays an important role in the safe travel of the vehicle. Brake system It is necessary to check whether the brake is weakened or deviated, whether the pedaling force of the brake pedal has changed, and if necessary, arrange all the pipelines of the brake system. 5. The replacement cycle is up, and you must replace them in time to ensure the smooth circulation of the oil

Look at the appearance. Look at the protective layer In order to facilitate storage and prevent the parts from bumping, there is a protective layer before the parts leave the factory; if there are problems such as dry cracking, oxidation, discoloration mirror or aging of auto parts, it may be caused by poor storage environment, long storage time, poor material itself, etc. Look for missing parts.

The original accessories are made of qualified materials according to the design requirements; Look at the paint; auto parts Auto parts. Some regular parts are marked with certain marks; The packaging of original accessories is generally standardized, unified standard specifications, and the printing is clear and regular; Look at the color. Some original parts specify a certain color on the surface;

Look at the specifications When purchasing auto parts, you must find out the main technical parameters, and the special technology must meet the requirements for use; The printing or casting and marking of the original accessories are clear and regular; Look at the texture.

The regular assembly parts must be complete and intact to ensure smooth loading and normal operation; Look at the logo. Look at the Casting Auto Mould packaging. Look at the poor craftsmanship; Test report issued by a third party. if the clutch plate rivets are loose, the brake hoses are degummed, the joints of electrical parts are disconnected, and the paper filter element is disconnected, it cannot be used;

If car owners add unsuitable additives to the engine oil, it will cause changes in the lubricating properties of the engine oil. We should add engine oil according to the prescribed amount. There may be immiscibility or chemical reaction between engine oil and additives. The owner can replace it according to the type of oil required in the manual. Only for some old vehicles with a long driving range, the owner can appropriately increase the viscosity of the oil used to fill up the gap caused by long-term wear and improve the air tightness.. Does the oil change depend on the mileage or the shelf life?

For most car owners who do not have maintenance experience, it is very difficult to determine whether to replace the oil through the viscosity of the oil. Under frequent traffic jams or high temperature and cold conditions, the replacement cycle should be shortened. Normal engine oil is replaced at 5000 kilometers, semi-synthetic engine oil is replaced at 7500 kilometers, and fully synthetic engine oil is replaced at 10000 kilometers. Under normal circumstances, the owner can determine whether the oil needs to be replaced based on the mileage and shelf life of the oil.  are oil additives useful? At present, all kinds of engine oil additives on the market claim to be able to effectively reduce the wear of parts and reduce fuel consumption.

Do not add oil in violation of regulations Even if the correct genuine engine oil is used, if the engine oil is not added according to the regulations, it may cause problems in the vehicle. How can the oil tu black if there is no problem? There are two reasons for the blackening of engine oil:  Excessive carbon deposits in the engine; ②The old oil was not drained clean when changing the oil; In fact, as long as the machine filter system is normal, the blackening of the oil will not affect the use. Not only will it not reduce the wear and tear of mechanical parts, but it will also cause more serious damage to the vehicle.

The quality of genuine brand engine oils on the market is quite high and can maintain lubrication under high temperature conditions. Engine oil additives cannot be added randomly. There are nearly 20 marks for gasoline engine oil. Which engine oil is suitable for your car? Is the quality of the more expensive engine oil better? In fact, the more expensive the Casting mould Manufacturers oil, the better, it is *important to choose the oil that suits your car. But it is best to clean the oil circuit regularly to ensure that the oil is in an ideal working environment. Generally speaking, after adding new engine oil, the sludge and carbon deposits on the machine parts are dispersed in the oil, and the color of the engine oil will tu black after a certain period of time.

In addition, some car owners only add oil without replacing it, which will cause the parts to always operate in a poor lubrication environment and accelerate the wear of the parts. If the car owner maintains the bad driving habit of frequent sudden braking and rapid acceleration for a long time, the oil replacement cycle should also be advanced. *The simple way is to refer to the vehicle maintenance manual provided at the time of purchase. of observing that the oil color has tued black, it is concluded that it needs to be replaced