1. Types of rapier heads
(1) Generally speaking, they are classified according to the material used in the main body of the rapier head, which is mainly divided into two categories: carbon fiber composite rapier heads and metal rapier heads. . The classification of several main rapier heads is shown in Table 13-2.
(2) For each type of rapier head, some rapier heads can be divided according to the thickness of the yarn. For example, FAST, THEMA11E, GTM-AS and other rapier heads are divided into different categories. There are three types of weaving: coarse type, fine type and standard type.
2. Technical requirements for the rapier head
(1) The surface of the rapier head is smooth and has no waste edges, no burrs, no cracks, no dents, bubbles and other defects.
(2) The warp contact surface on the back of the sword head is smooth and streamlined, and there should be no defects such as warp breakage.
(3) The yarn clamping surface of the weft feeding sword should be tightly closed and seamless. After the weft yarn enters, the clamping is firm, reliable, not loose, and does not take off the yarn. The yarn can be released smoothly when the opening button is pressed.
(4) The hooking end of the weft sword and the yarn clamping rod cooperate with the working surface to form a wedge-shaped angle. When the weft yarn enters, it should be stuck in time and not loosen, cut or detach. Press the opening button ( Opener), the weft yarn can be released smoothly.
(5) The weft delivery sword and the weft receiving sword should be accurate and reliable, and the sword heads should not rub or collide with each other.
(6) The weft entrance of the sword head should allow the weft to enter smoothly, and the yarn should not be hung when passing through the warp.
(7) The body of the medium-high-speed carbon fiber composite rapier head should be conductive, and the resistance value between any two points should not be greater than 250Ω.
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