Shearing device for embroidery machine

Abstract

The invention relates to a shearing device for an embroidery machine, which comprises a lower shaft horizontally arranged on the embroidery machine frame, a shearing cam and a scissor mechanism which are arranged on the lower shaft, and a scissor driving mechanism matched with the shearing cam, wherein the scissor mechanism comprises a rotating base which is arranged on the frame and can rotate around the center, a cambered movable knife which is fixedly arranged on the rotating base and can rotate around the center of circle along with the rotating base, and a fixed knife which is fixed on the frame and can be matched with the cambered movable knife; a thread hooking corner and a thread separating corner which extend in the rotating direction of the movable knife are formed at the front end of the movable knife; a shearing knife edge is formed between the thread hooking corner and the thread separating corner; and the scissor driving mechanism is used for driving the rotating base to rotate, so that the movable knife can rotate between the stand-by station and the shearing position. The invention can shear thick threads, and the cross section of the thread is flat and is not fluffy.

Description

technical field [0001] The invention relates to an embroidery machine thread trimmer. Background technique [0002] The traditional thread trimmer of the embroidery machine uses a knife similar to a fishtail, and the fixed knife and the movable knife are normally closed. When the movable knife is out of the knife, the tail hook divides the thread on the needle to the back, and when the knife is returned, the front hook guides the thread on the cloth into the knife edge, and the movable knife and the fixed knife are closed to cut it short. Because the fabric is made of multi-layer thick material or leather fabric, the embroidery thread is thick and requires a high tension of the thread. When the thread is divided or hooked, the thread often cannot be hooked or the thread is hooked, resulting in unstable thread trimming and making the embroidered Product quality declines, scrap rate increases, and production efficiency decreases. Contents of the invention [0003] The obje...

AI Technical Summary

Problems solved by technology

Because the fabric is made of multi-layer thick material or leather fabric, the embroidery thread is thick and requires a high tension of the thread. When the thread is divided or hooked, the thread often cannot be hooked or the thread is hooked, resulting in unstable thread trimming and making the embroidered Product quality declines, scrap rate increases, and production efficiency decreases

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