weft needle 4/65 6/65

Definition and Function

Structural Characteristics

• Shape: Weft needles are generally slender, usually with a sharp head. This shape design enables them to easily pass through the shed formed by the warp yarns. For example, in plain weave ribbon weaving machines, the sharp head of the weft needle can easily shuttle between the warp yarns that alternate up and down, bringing the weft yarns into the appropriate positions. The tail of the weft needle often has a connecting structure, which is used to connect with the transmission mechanism of the ribbon weaving machine to receive power and achieve reciprocating motion.
• Material: Weft needles need to have high strength and toughness, as well as good wear resistance. They are generally made of metal materials, such as high-quality alloy steel. Alloy steel weft needles can withstand the impact force and friction generated during high-speed shuttling, and are not easy to break or wear. This is because during the ribbon weaving process, the weft needles need to move back and forth frequently and keep contacting with the warp and weft yarns. If the material is not good, they are prone to damage, affecting the normal production of ribbons.
• Size: The size of weft needles varies depending on the type of ribbon weaving machine and the weaving requirements. Their length is usually determined according to the width of the ribbon weaving machine and the depth of the shed. For example, for narrow-width ribbon weaving machines, the length of the weft needle may be between a few centimeters and a dozen centimeters, while for wide-width ribbon weaving machines, the length may reach dozens of centimeters. The diameter of the weft needle is generally small, about a few millimeters. This is to minimize the interference with the warp shed and ensure that the needle has sufficient strength to complete the introduction of weft yarns.