Who understands the injection molding industry? What defects will be produced when the product is pu

Mainly: 1: lack of glue caused by 1The temperature of the barrel and nozzle is low.

2.The mold temperature is too low.

3.The measurement is too small.

4.The injection pressure and speed are too small.

5.The injection time is too short.

6.Poor mold venting.

7.Debris clogging the nozzle or gate.

8.The gate is too small.

Solve the above methods:1Increase the temperature of the barrel and nozzle.

2.Increase the mold temperature.

3.Increase the metering.

4.Increase injection pressure and speed.

5.Extend the injection time.

6.Mold plus exhaust.

7.Clean the spout or gate.

8.Properly design the gating system.

Two: Phi Feng Cause 1The injection pressure is too high and the speed is too fast.

2.The clamping force is too small or the force is applied in one direction.

3.The holding pressure switching position is too small.

4.The material temperature is too high.

5.There are people and debris between the molds.

6.The mold is deformed or parted and uneven.

The above solutions:1Reduce injection pressure and speed.

2.Adjust the clamping force.

3.Hold pressure in advance.

4.Reduce the material temperature.

5.Wipe the mold clean.

6.Adjust the mold or flatten.

3. Clamping line Cause 1: The material temperature is too low.

2.Low mold temperature.

3.Low injection pressure.

4.Slow injection rate.

5.The measurement is too small.

6.Poor mold venting.

The above solutions:1Increase the material temperature.

2.Increase the mold temperature.

3.Increase injection pressure.

4.Speed up the injection.

5.Increase the metering.

6.Mold venting.

4. Deformation Causes 1Short cooldown.

2.The ejection force is uneven.

3.The mold temperature is too high.

4.The internal stress of the product is too great.

5.Poor water flow and uneven cooling.

6.The thickness of the product is uneven.

The above workaround.

1.Extended cooldown.

2.Change the ejector position.

3.Reduce the mold temperature.

4.Relieves internal stress.

5.Change the mold waterway.

6.Correct design of products and molds.

In addition, there are also defective materials, silver patterns, etc.

It's too much to say clearly.

Plastics mainly contain benzene, if perennial exposure to fluoride and benzene and other toxic and harmful substances. It may have an impact on all systems of the body. Occupational disease hazards that may occur when engaged in injection molding work for a long time.

Therefore, the cumulative maximum working time of such a type of work should generally not exceed eight years, and it is necessary to pay attention to regular physical examinations.

There are five major hazards of excessive temperature rise of injection molding machine: thermal deformation of machinery, reduction of oil viscosity, deformation of rubber seals, acceleration of oil oxidation and deterioration, and also reduction of air component pressure.

One of the hazards: thermal deformation of the machinery.

The moving parts with different thermal expansion coefficients in the hydraulic components are stuck because of the small fitting clearance, which causes the action failure, affects the transmission accuracy of the hydraulic system, and leads to the deterioration of the working quality of the components.

Hazard 2: Reduce the viscosity of the oil.

Excessive temperature rise in the injection molding machine will result in a decrease in the viscosity of the oil, an increase in leakage, and a significant reduction in the volumetric efficiency of the pump and the efficiency of the overall system. As the viscosity of the oil decreases, the oil film of moving parts such as spool valves becomes thinner and cut, and the frictional resistance increases, resulting in increased wear.

Hazard 3: Deform the rubber seal.

The high temperature rise of the injection molding machine will deform the rubber seals, accelerate the aging and failure, reduce the sealing performance and service life, and cause leakage.

Hazard 4: Accelerate the oxidation and deterioration of oil.

The high temperature rise of the injection molding machine will accelerate the oxidation and deterioration of the oil, precipitate the asphalt substance, and reduce the service life of the hydraulic oil. The precipitate clogs the damping holes and slot valve ports, resulting in the pressure valve being stuck and unable to operate, and the metal pipeline being elongated and bent, or even ruptured.

Hazard 5: Cause the working quality of the parts to deteriorate.

If the temperature rise of the injection molding machine is too high, the working quality of the parts will deteriorate, and the dissolved air in the oil will escape, resulting in cavitation, which will reduce the working performance of the hydraulic system.

The ideal working temperature of the hydraulic system should be between 45 degrees and 50 degrees, because the hydraulic system is designed according to the viscosity of a selected pressure oil, but the viscosity will change with the oil temperature, and then affect the working components in the system, such as cylinders, hydraulic valves, etc., so that the control accuracy and response sensitivity are reduced, especially for precision injection machines. At the same time, too high temperature will also accelerate the aging of the seal, causing it to harden and break. If the temperature is too low, the processing energy consumption is high, and the running speed is reduced. Therefore, it is necessary to pay close attention to the operating temperature of the hydraulic fluid.

There are many reasons for high oil temperature, but most of them are due to oil circuit failure or cooling system failure.

Injection molding is a plastic processing process, which melts plastic particles at a certain temperature and then injects them into various molds through the injection nozzle to become a variety of plastic products used in people's daily life! Such as: plastic toys, plastic fruit plates, plastic accessories, etc.!

Occupational disease hazards that may occur when engaged in injection molding work for a long time.

Because the plastics we often choose are ABS, PVC, PE, which have an impact on the human body: when PVC is degraded in 140 heat, the chlorine released will become dilute hydrochloric acid when it encounters water in the air, and if it is inhaled into the human body, it will damage the respiratory tract of the human body.

ABS odor focus. Relatively speaking, PP and PE are very harmful to the human body and can be ignored.

It takes more than 200 years for plastic to rot when buried in the ground, and it seriously damages the environment and pollutes the soil, posing a threat to animal survival.