SMH-2-B(Q)6-5TR Synchronized Bobbin Case

Introduction of MIM bobbin case 6-5TR

SMH-2-B(Q)6-5TR bobbin case

SMH-2-B(Q)6-5TR

Qinhuangdao Zhongwei Precision Machine Parts Co., Ltd. specializes in the production of metal injection molding parts. The company has long-term strategic cooperation with domestic Yongyao, Desheng, Sanming and other rotary hook production international companies such as Japan's Zovin rotary shuttle, and Italy's Simon and other enterprises. Metal injection-molded hook case, material After joint research and efforts with Central South University, the products produced by the company not only have good wear resistance, but also have high hardness. Each year, Desheng supplies 600,000-800,000 hook cases, and 10 other manufacturers. -300,000 bobbin case supply.

Advantages and disadvantages of hook and shuttle

What are the pros and cons of the hook and the shuttle? Why are some machines designed as rotary shuttles, such as flat-head buttonhole machines, high-speed lockstitch machines, etc., while some machines are designed as shuttles, such as bar tacking machines, 1903 buttoning machines, old-fashioned household machines, etc.? Wouldn't it be better if bar tacking machines, 1903 buttoning machines, and old-fashioned household machines were designed as rotary hooks?

The shuttle has a simple structure and low cost, but has a warp inertia force, which will cause wear on both ends of the shuttle carriage on the shuttle bed guide rail and on the shuttle itself. It is only used on household sewing machines and a few low-speed sewing machines. The rotary hook can rotate at a uniform speed, runs smoothly, and has low noise, which is suitable for high-speed sewing machines. The working principle, structure and classification of the rotary hook are introduced below for more understanding.

Among sewing equipment, sewing machines with lock stitches are the most common. Most of these sewing machines use a rotary hook, which hooks the thread loop with its tip, expands the thread loop, and guides the thread loop around the bobbin to form a lock stitch. The working principle of the ordinary rotary hook is described below.

After the needle rises a certain distance from the lowest point, the hook tip of the hook bed starts to hook into the thread loop, and the hook tip hooks the thread loop and continues to rotate. The hook of the hook of the shuttle rack should be hooked, and the hook of the hook on the hook should be close to the loop so that there is a gap at the end of the loop.

The time moves to the back of the guide rail. The angle between the thread splitting hook and the axis of the needle movement is about 50°, and the thread loop is hooked at 45° on the convex surface of the outer frame of the shuttle tip of the shuttle hook. On the thread hook, in order to make the thread loop slide smoothly onto the surface of the shuttle rack, the beveled edge of the tail of the thread plate pulls the thread end of the thread loop away from the surface, and the rear of the thread loop is hooked by the hook of the shuttle rack. , slide down toward the bottom of the hook frame, and at this moment, the needle exits the hook. Because the thread passing area of the shuttle frame is very smooth, the thread loop can slide out from the bottom of the shuttle frame smoothly, and when the tip of the shuttle rotates 180°, the thread take-up lever rises, and the remaining part of the thread sent down before the thread take-up lever is taken up. , the tip of the shuttle hooks the thread loop and continues to rotate. The front half of the thread loop is under the thread guide. After passing through the 45° slope of the convex surface of the outer frame, the edge of the moving thread guide is gradually higher than the shuttle frame, and the first half of the thread ring is pushed outwards. The second half of the thread loop is hooked by the hook of the shuttle frame, and the thread loop is separated from the front and the rear. Finally, the front and back of the thread loop are covered with the shuttle frame, and the bottom thread is placed in the middle, and the thread loop is tightened by the thread take-up rod to form a stitch.