燒焦是指在注塑加工過程中由於模具排氣不良或注射太快，模具內的空氣來不及排出，則（zé）空氣會在瞬間（jiān）高壓下（xià）急（jí）劇升溫，而將（jiāng）熔體在（zài）某些位置（zhì）燒黃燒焦的現象。那麽（me）怎麽去呢（ne）？

　　Charring refers to the phenomenon that the air in the mold cannot be discharged due to poor exhaust or injection too fast in the process of injection molding, and the air will heat up rapidly under the instant high pressure, and the melt will be burnt yellow and charred in some positions. So how to solve it?

　　末（mò）端注射速度（dù）過快：降低比（bǐ）較靠後的一級注射速度。

　　Too fast terminal injection speed: lower the injection speed of the lower first stage.

　　模具排氣不良：加大（dà）或增開排氣槽（抽真空（kōng）注塑）。

　　Poor exhaust mold: increase or open exhaust groove (vacuum injection molding).

　　注射壓力過大（dà）：減小注（zhù）射壓力（可減（jiǎn）輕壓縮程度）。

　　Injection pressure is too high: reduce the injection pressure (can reduce the compression degree).

　　熔料溫（wēn）度（dù）過高（gāo）（黏度降低）：降低熔料溫度，降低其流動性。

　　The temperature of the melt is too high (viscosity is reduced) : the temperature of the melt is reduced and its fluidity is reduced.

　　澆口過小或位置不（bú）當：改大澆口或改變（biàn）其位置（改變排氣）。

　　Gate too small or improperly positioned: change the gate or change its position (change the exhaust).

　　塑膠材（cái）料的熱穩定性差（易分解）：改用（yòng）熱穩定（dìng）更好的塑料。

　　Poor thermal stability of plastic materials (easy to decompose) : switch to plastic with better thermal stability.

　　可能是溶體破裂（liè）導（dǎo）致燒焦，當熔體在高速，高（gāo）壓條件下注入容積（jī）較大的型腔時，極易產生熔體破裂現象，此時，熔體表麵出現橫向斷裂，斷裂麵積為粗糙地夾雜在塑件表層形成糊斑。特別是少量熔（róng）料直接注入容易過大的型腔時，熔體破裂更（gèng）為嚴重，所呈現的糊斑也就越大。

　　When the melt is injected into the cavity with large volume at high speed and high pressure, it is easy to produce the phenomenon of melt rupture. At this time, transverse fracture occurs on the surface of the melt, and the fracture area is coarsely mixed in the surface of the plastic parts to form paste spots. Especially when a small amount of melt is directly injected into the cavity which is easy to be too large, the melt rupture will be more serious and the paste spot will be bigger.

　　濟南注塑加工成（chéng）型條件控製（zhì）不（bú）當導致燒焦一（yī）般情況下，層流形成的塑件表麵較為光亮平（píng）整，紊流條件下形成的塑件不僅表麵容易出現糊（hú）斑，而且塑件內部容易產生氣孔（kǒng）。因此，注射速度不能太高，應將流料控製在層流狀態下充模。如果熔料的溫（wēn）度太高，容易引起熔料分解焦化，導致塑件（jiàn）表麵產生糊斑。

　　Ji 'nan injection molding conditions caused by improper control of burning in general, laminar flow formed the surface of the plastic parts is bright and smooth, turbulent flow conditions formed under the plastic parts are not only easy to appear on the surface of the paste spot, but also easy to produce pores in the plastic parts. Therefore, the injection speed should not be too high, and the flow material should be controlled in the laminar flow state. If the temperature of the melt is too high, it is easy to cause the decomposition and coking of the melt, resulting in paste spots on the surface of the plastic parts.

　　濟南注（zhù）塑加工過程中出現（xiàn）燒焦的問題到此講解完畢了，如果您還有其他方麵的問題（tí）要了解的話（huà），可以來我們網站www.lsjtcyjt.cn谘詢下！

　　Ji 'nan injection molding process in the burning problem to the end of this explanation, if you have other problems to understand, you can come to our website www.lsjtcyjt.cn consultation!