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After plastic injection molding, what are the factors that affect the cooling rate of the product?
After plastic injection molding, it is mainly the wall thickness of the plastic product. The greater the thickness of the product, the longer the cooling time. Generally speaking, the cooling time is approximately proportional to the square of the thickness of the plastic product, or proportional to the 1.6th power of the largest runner diameter. That is, the thickness of the plastic product is doubled, and the cooling time is increased by 4 times.
2021-08-27
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Basic introduction of steering knuckle
The steering knuckle is one of the main parts on the steering axle of the car, which can make the car run stably and sensitively transmit the driving direction. The function of the steering knuckle is to bear the load of the front of the car, support and drive the front wheel to rotate around the king pin to turn the car. In the driving state of the car, it is subjected to variable impact loads, therefore, it is required to have high strength.
2021-08-21
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Cooling stage of plastic injection molding
In plastic injection molding tools, the design of the cooling system is very important. This is because the molded plastic product can only be cooled and solidified to a certain rigidity, and then the plastic product can be prevented from being deformed due to external force after being demolded.
2021-08-13
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Pressure holding stage of plastic injection molding
In the pressure holding stage of plastic injection molding, its function is to continuously apply pressure, compact the melt, and increase the density (densification) of the plastic to compensate for the shrinkage behavior of the plastic. During the pressure holding process, the back pressure is relatively high because the mold cavity has been filled with plastic. In the process of maintaining pressure and compaction, the screw of the injection molding machine can only move forward slowly, and the flow speed of the plastic is relatively slow.
2021-08-06
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Filling stage of plastic injection molding
Filling is the first step in the entire injection cycle process. The time starts from when the mold is closed and the injection is started until the mold cavity is filled to about 95%. In theory, the shorter the filling time, the higher the efficiency of plastic injection molding; but in actual production, the molding time (or injection speed) is restricted by many conditions.
2021-08-04
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About material selection of wheelie bin axle
The selection of shaft parts materials is mainly determined according to the strength, rigidity, wear resistance and manufacturing process of the shaft, and strives to be economical and reasonable. 1. Ordinary carbon steels such as Q235 and Q255 can also be used for shafts with small or less important loads, such as our wheelie bin axles;
2021-07-31
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