injection joints

Product joints are usually caused by low temperature and low pressure at the joints.

 1. Temperature issue:

 ① The temperature of the material barrel is too low;

 ② The nozzle temperature is too low;

 ③ The mold temperature is too low;

 ④ The mold temperature at the joint is too low;

 ⑤ The temperature of plastic melt is uneven.

 2. Injection molding issues:

 ① Injection pressure too low:

 ② The injection speed is too slow.

 3. Mold issue:

 <1> Poor exhaust at the joint;

 <2> Poor exhaust of components;

 <3> The diversion channel is too small;

 <4> The gate is too small;

 <5> The inlet diameter of the three channels is too small;

 <6> The nozzle hole is too small;

 <7> If the gate is too far from the joint, an auxiliary gate can be added;

 <8> The wall thickness of the product is too thin, causing premature solidification;

 <9> Core offset, resulting in one-sided thinning;

 <10> The mold is offset, causing one side to be thin

 <11> The parts are too thin and thickened at the seams;

 <12> Unequal filling rates;

 <13> Interruption of filling material flow.

 4. Equipment issues:

 ① The plasticizing capacity is too small;

 ② The pressure loss in the material barrel is too large (plunger type injection press).

 Material issue:

 ① Material contamination;

 ② The material flowability is too poor, adding lubricant to improve flowability.