Common disadvantages of poor molding
1. Insufficient injection volume
1. The injection volume and plasticity are not enough. 2. The amount of rubber material is not enough. 3. The injection pressure is too low. 4. The temperature of the rubber material is too low. 5. The injection speed is too fast.
2, the finished product has burrs
1. The injection pressure is too high. 2. The mold closing pressure is too small. 3. The injection volume is too large. 4. The secondary pressure time is too long. 5. The injection speed is too fast.
3. Shrinkage phenomenon
1. The injection pressure is too low. 2. The secondary pressure time is too short. 3. The injection speed is too slow. 4. The temperature of the rubber compound is high.
4. Flow traces
1. The temperature of the rubber compound is low, resulting in poor fluidity 2. The injection speed is too slow. 3. The secondary pressure is too low 4. The secondary pressure time is short
5. Contains bubbles
1. Low injection pressure 2. Low secondary pressure 3. Short secondary pressure time 4. High injection speed too fast
6, bending deformation
1. High injection pressure 2. High secondary pressure 3. Long secondary pressure time 4. Low material temperature 5. Slow injection speed 6. Too short cooling time
It is a common phenomenon for the power plug to heat up during use. For example, the most common mobile phone charger, when your mobile phone is charging, when you unplug it after charging, you will find that the plug of the charger is very hot, then it is What causes the plug to heat up during use? The so-called preventing the plug from getting hot or hot is actually the problem of the plug wiring. Therefore, in the production process of the power cord plug, it is necessary to do the wiring work well. There are no twists and turns, no cracks, no surface requirements, and the power plug is as perfect as possible. The punching and reconciliation of different inserts must be operated through various dies of different sizes and shapes. It must be seated correctly, what kind of mold should be used for what kind of inserts, and if other types of molds are used to punch inappropriate inserts, there will be problems such as looseness and copper exposure, so it must be produced accordingly. Power plugs such as South Africa have relatively large terminals, so thicker copper wires are needed to fix them, but if the wire diameter required by the customer is relatively small, how to deal with it? You can increase the length of the stripped copper, and then fold the copper wire in half to increase the thickness of the copper wire so that the terminal can be firmly punched and will not loosen, and the next production process is also concerned. Another example is the British assembly plug. In the work, we must first pay attention to the part of the copper head of the power cord and then proceed to the assembly steps. During the assembly process, pay attention to the length of the power cord inserted into the plug, and also pay attention to the tightening degree of the screws. If it is too loose, the upper and lower covers of the plug will move. All in all, find the cause of the plug heating, if not the cause of the current overload, it is the cause of the plug itself.
