在塑料注射成型前如果需要清除注射机和料筒中可能残留的塑料与将要投入使用

在塑料注射成型前如果需要清除注射机和料筒中可能残留的塑料与将要投入使用的塑料不同或者其颜色不一致时一定要对其进行清洗。对于传统的螺杆式成型注射机通常需要采用直接的换料机进行清洗,换料机在进行清洗时,必须充分掌握目前料筒成型注射中的残存塑料和欲需要换料的成型注射特性,然后采用正确的成型注射清洗方法和步骤,例如新塑料的成型注射温度已经高于目前残存料筒中的所有残留塑料的最低成型注射温度时应将目前残存料筒的注射温度进一步升高到新残存塑料的最低成型注射温度然后在料筒中加入新的塑料然后连续进行对空的成型注射直到目前残存的塑料全部成型清洗注射完毕,在重新调整成型注射温度之后进行正常的生产。如果新塑料的最好成型流动温度已经低于残存塑料的最好成型流动温度时应将料筒的成型流动温度适当地升高到残存塑料的最好流动成型温度后立即切断清洗器的电源用新料在降温下对料筒进行清洗。如果新料的成型过程温度高,而在换料筒过程中的残存料是热敏性较好的塑料则我们应尽量选用具有热稳定性的塑料作为过度换料,先换出温度好的热敏性材料再用新的材料进行清洗热稳定性的塑料。

在塑料注射成型前如果需要清除注射机和料筒中可能残留的塑料与将要投入使用的塑料不同或者其颜色不一致时一定要对其进行清洗。 对于传统的螺杆式成型注射机通常需要采用直接的换料机进行清洗,换料机在进行清洗时,必须充分掌握目前料筒成型注射中的残存塑料和欲需要换料的成型注射特性,然后采用正确的成型注射清洗方法和步骤, 例如新塑料的成型注射温度已经高于目前残存料筒中的所有残留塑料的最低成型注射温度时应将目前残存料筒的注射温度进一步升高到新残存塑料的最低成型注射温度然后在料筒中加入新的塑料然后连续进行对空的成型注射直到目前残存的塑料全部成型清洗注射完毕 ,在重新调整成型注射温度之后进行正常的生产。 如果新塑料的最好成型流动温度已经低于残存塑料的最好成型流动温度时应将料筒的成型流动温度适当地升高到残存塑料的最好流动成型温度后立即切断清洗器的电源用新料在降温下对料筒进行清洗。 如果新料的成型过程温度高,而在换料筒过程中的残存料是热敏性较好的塑料则我们应尽量选用具有热稳定性的塑料作为过度换料,先换出温度好的热敏性材料再用新的材料进行清洗热稳定性的塑料。

Before plastic injection molding, if it is necessary to remove the residual plastic in the injection machine and the barrel, which is different from the plastic to be put into use or whose color is inconsistent, it must be cleaned. The traditional screw injection molding machine usually needs to use a direct refueling machine for cleaning. When the refueling machine is cleaning, it must fully grasp the residual plastic in the current barrel molding injection and the molding injection characteristics of the desired refueling, and then use the correct molding injection cleaning methods and steps. For example, the molding injection temperature of the new plastic has been higher than all the remaining barrels at present. When the minimum molding and injection temperature of the residual plastic is increased to the minimum molding and injection temperature of the new residual plastic, the new plastic is added into the barrel, and then the molding and injection are carried out continuously until all the remaining plastic has been cleaned and injected, and the normal production is carried out after the molding and injection temperature is readjusted. If the best forming flow temperature of the new plastic is lower than that of the remaining plastic, the forming flow temperature of the barrel shall be properly increased to the best flow forming temperature of the remaining plastic, and the power supply of the cleaner shall be cut off immediately, and the barrel shall be cleaned with the new material under the temperature drop. If the molding temperature of new material is high, and the residual material in the process of refueling barrel is the plastic with better thermal sensitivity, we should try to select the plastic with thermal stability as the over refueling, first change out the thermal sensitive material with good temperature, and then clean the plastic with thermal stability with the new material.<br>