The invention provides an automatic sewing device for an annular cloth bag, which is a special automatic sewing mechanism for precise sewing of the cloth bag and comprises a power mechanism, a
servo lifting platform, a clamp and a sewing mechanism. After the mechanism is assembled, the second pneumatic claw grabs the needle thread on the needle thread plate, the second transverse moving module and the second transverse moving module move cooperatively to drive the needle thread to penetrate through the middle of the clamp together with the cloth bag, the first pneumatic claw takes out the needle thread from the other side through the first transverse moving module and the first transverse moving module, and the
servo rotary table drives the cloth bag to rotate by 60 degrees. The first transverse moving module, the first horizontal moving module, the second transverse moving module and the second horizontal moving module cooperatively move to enable the second pneumatic claw to grab the silk thread on the first pneumatic claw back to the threading position, the operation is repeated, a circle of sewing is completed at the positions of the six clamps of the cloth bag, threading operation is repeated three times at the last sewing position, silk thread tensioning is completed, and the sewing process is completed. After tensioning, the second pneumatic claw clamps the wire and moves to the position right in front of the
wire cutting air cylinder along with the second transverse moving module, the
wire cutting air cylinder stretches out, and
wire cutting is completed through heating of the
resistance wire. According to the cloth bag
sewing machine, the huge difficulty brought to
production line personnel due to limitation of the material and the structure of a cloth bag is solved, full-automatic and unmanned cloth bag sewing is realized, the product performance and the quality consistency are favorably improved, and the cloth bag sewing stability requirement is ensured.