Thread trimming device

Abstract

The invention discloses a thread trimming device. The thread trimming device comprises a lower shaft which is transversely and horizontally arranged on the machine frame of an embroidery machine, a thread trimming cam which is arranged on the lower shaft, a scissor mechanism, and a scissor driving mechanism which is matched with the thread trimming cam; the scissor mechanism comprises a rotating seat which is arranged on the machine frame in the manner of being capable of rotating around the center, an arc-shaped movable knife which is fixedly arranged on the rotating seat and can rotate around the circle center of the rotating seat along with the rotating seat, and a fixed knife which is fixedly arranged on the machine frame and can be matched with the arc-shaped movable knife; a thread hooking corner and a thread dividing corner which extend in the rotating direction of the movable knife are formed at the front end of the movable knife; a thread trimming knife edge is formed between the thread hooking corner and the thread dividing corner; the scissor driving mechanism is used for driving the rotating seat to rotate so as to enable the movable knife to rotate between a standby position and a thread trimming position. The thread trimming device has the advantages that a thick thread can be trimmed, the cross section of an upper thread is smooth without burrs, and the like.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a thread cutting device. 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. Content...

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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