Due to the situation of funds and vehicles, many owners will choose to buy second-hand trucks. However, the greatest concern during the purchase process is the quality of the vehicle body. What kind of second-hand trucks are considered to be worth the purchase?

1, it is best to use between 2 to 4 years of age

The price of second-hand trucks in two to four years is obviously different from that of new ones, and the vehicles have already gone through the running-in period and are in a good use period. As long as the original owner performs regular maintenance on time, basically no problem, but doing some related tests is still necessary. Personal advice is best to buy a maintenance record, according to the original owner of the vehicle maintenance rules continue to maintain, can effectively maintain vehicle performance.

2, optimistic about the mileage of second-hand trucks.

The mileage and travel time seriously affect the life of trucks. General trucks in the form of 150,000 -200,000 kilometers after the car's performance will be significantly reduced, maintenance cycle and costs will be significantly increased, so we must look at the mileage of trucks, generally can be read through the odometer, However, the mileage of some foreign imported cars is calculated in miles. Attention should be paid to switching. In the course of determining the mileage, you can use the owner's frequency of use and use of time and tire wear to do a reference.

3, the overall inspection of trucks.

When selecting second-hand cargoes, it is first necessary to check whether the various ancillary facilities for cargo loading can work properly. Such as mirrors, turn signals, and air conditioning equipment, these are basic, and the most important are the following:

1. Damage to the vehicle body: Observe carefully whether the joint is bent, whether it is of a different size, etc. If this happens, it proves that the car has experienced an accident and has undergone major maintenance;

2. Corrosion degree of the body: If the truck window and joints are seriously rusted, it means the car is older;

3. Positioning of the front wheel: Use the jack to lift the front wheel and shake the front wheel with your hand to see if there is left and right, shaking up and down. If there is a large gap, it indicates that the bearing and other parts of the vehicle are seriously worn;

4. Inspection of shock absorbers and suspension systems: Press down firmly on the corner of the front of the car. After relaxing, the vehicle will automatically spring back and bounce freely 2-3 times. If this is not the case, the shock absorber or the suspension spring is working. bad.

After a series of inspections have been completed, if the prices are appropriate, then congratulations on finding a second-hand truck worthy of purchase.

Precision Casting Of Food Machinery

Food machinery precision casting or food machinery investment casting, silica sol process. It is a casting process with little or no cutting.

Cast food machinery is an excellent process technology in the foundry industry. Its application is very extensive. Food machinery cast not only applies to the casting of various types and alloys, but also produces the dimensional accuracy of castings. The surface quality is higher than that of other casting methods, and even castings that are difficult to cast and which are difficult to cast have high temperature resistance and are not easily processed can be cast using investment casting.

In wax pattern process,we mix stearic acid and paraffin wax in wax pattern making,as you know,it is better than polyethylene,and the wax deformation is small.

In shell making,we adopt automatic sand-covering production line, which was invented under the guidance of our general manager.The indoor temperature was controlled by air-conditions,keeping the temperature at 24℃±1℃, which can make the castings much more stable,the internal tissues much more well-proportioned.

In shell hardening process,we use aluminium chloride to harden the shell.This can make the shell so hard that it can`t be distorted,at the same time the bug which the casting may have will be decreased.If there are letters or numbers in it,they will be much clearer.

In dewaxing process,about 95% of the castings suppliers adopt the original water dewaxing technics,but we using the advanced steam dewaxing technics,which we are very proud of. This can effectively avoid the air-hole and sand-hole, making the casting look much nicer.

In smelt process, we use middle frequency furnace, avoiding the emergence of the oxide; in molten steel control part, we use Germany-imported direct reading spectrometer machine, assuring its quality before the molten steel out of the furnace. During this process we use ERP production and management software to get the feedback information.

In shell-knock out process, we have special machines,which can decrease the hitting and knocking, easily made by manual shell knocking out.

In shot-blasting process, we have crawler-type and hanging shot-blasting machine, with steel shot 0.5-0.8, making the products smooth.Of course, if the customer wants it look much nicer, we also can carry out sand-blast treatment.

In heat treatment process, we use electric furnace, and adopt double-temperature control in order to heat the products equally. As a result, the products will have great metallurgical structure.

Our tolerance can reach at the grade of 5-7 according to our country`s tolerance standard.

In machining process,we have 12 CNC machining centers and some other machines, so we can make further machining if the customers need.

Precision Casting Of Food Machinery,Investment Casts for Food Machinery,Food Machinery Investment Casts,Steel Casting for Food Machinery

Wei fang junlong precision casting Co.,Ltd , https://www.junlongcasting.com