Packaging machine for plastic bags

The utility model provides a plastic bag packaging machine which comprises a supporting frame, a heat sealing mechanism is arranged above the supporting frame, the heat sealing mechanism comprises an upper heating block and a lower heating block which correspond to each other, the upper heating block is driven by a lifting air cylinder, and a pedal switch used for driving the lifting air cylinder is further arranged below the supporting frame. Heat insulation wood plates are arranged on the back faces of the upper heating block and the lower heating block, so that a heat insulation layer is formed between the heat sealing mechanism and the supporting frame. The heat sealing mechanism is driven by the pedal switch, operation is convenient, the structure is simple, plastic bags which are poor in edge sealing effect and free of edge sealing can be reprocessed, and waste is effectively reduced. 本实用新型提供了一种塑料袋的封装机，包括支撑架，在支撑架的上方设有热封机构，所述热封机构包括相对应的上加热块和下加热块，所述上加热块通过升降气缸驱动，在所述支撑架的下方还设有用于驱动升降气缸的脚踏式开关；在所述上加热块和下加热块的背面均设有