Double Ring
A double ring is a ring made by winding notched metal wire into a double spiral, used as a ring for connecting tape, cord, and accessories.
Contents6 sections
Definition and Overview
A double ring is a ring-shaped attachment made by winding a metal wire twice, using the overlap of the wires to hold objects in place. It is attached by passing the end of the tape or metal fitting through the slit. It does not have an opening or closing mechanism, making it less likely to come loose after being connected.
Generally, a circular ring refers to a single-wire ring that is either unbroken or has a closed joint, while a double ring refers to the double-wound structure itself. It has a structure similar to a key ring, but in clothing materials, it is used as a connecting ring.
Materials and structure
Metal is the primary material used, including brass, iron-based materials, and stainless steel. The appearance, weight, springiness, and corrosion resistance vary depending on the material, wire diameter, winding tightness, and surface finish.
Because the double-layered wires sandwich the material through which it is threaded, it is less likely to come loose than a single-wire circular ring, but it is more difficult to thread thick tape or hard metal fittings through. When attaching, do not force the material in, but twist it along the winding.
- brass is a material that easily produces a sophisticated, understated metallic look.
- Stainless steel is a good option for applications that come into contact with moisture.
- While plated surfaces make it easier to match colors, it's necessary to check their durability according to the usage environment.
How to express size
Sizes are generally indicated by the inner diameter. The inner diameter is the usable space inside the ring and is different from the outer diameter or wire diameter. Even with the same inner diameter, a thicker wire diameter will result in a larger outer diameter and weight, and the amount of clearance for threading will also change.
The width of the tape to be threaded should be chosen based on whether the tape can move freely within the ring. If the tape width and inner diameter are the same, it may be difficult to thread due to the thickness and seam allowance. Check the tape thickness, the folded portion, and the bulk after sewing.
- Inner diameter: This is the standard used when considering the dimensions of the material to be passed through.
- Wire diameter: This refers to the thickness of a metal wire, which affects its strength, weight, and appearance.
- Outer diameter: This dimension is used to check for interference with other parts or product edges.
Main applications
It is used to connect tapes, strings, chains, and metal fittings such as carabiners to bag straps, keychains, pouches, accessories, and tags. It is suitable for connections that are not frequently removed after being fixed in place.
In clothing, they are used to connect decorative hanging parts and loops for small items. However, for areas where length adjustment is necessary, such as belts, different types of metal fittings are used, such as slide adjuster or snap fasteners, to adjust the length by threading the tape through them.
How to choose and points to note
For applications involving loads, the inner diameter, material, wire diameter, tape strength at the mounting point, and sewing specifications should all be considered together. Even if the double ring itself is difficult to detach, tape wear or damage to the stitching may occur first. It is important to test it under conditions close to actual use.
Because it is made of metal, its weight may be a burden in products where lightness is a priority. Furthermore, in applications exposed to sweat, moisture, seawater, detergents, etc., the possibility of rust, discoloration of the plating, and corrosion should be checked. Contact with different metals can also cause changes in appearance.
For products with a metal detection process, double rings are subject to metal detection. The feasibility of needle detector compatible, the operating conditions of the metal detector, and the method of preventing contamination are confirmed in advance during the production process. Damaged or deformed rings are not used as they may damage clothing or bags.
FAQ
Where can I find the correct size for a double ring?
First, check the inner diameter to determine if there is enough clearance for the tape width and fitting thickness. Also, check the wire diameter and outer diameter. A thicker wire diameter will affect strength, but it will also increase weight and thickness, changing the size of the components that can be attached.
How do you differentiate between using double rings and circular ring?
For applications where a secure connection is important and the parts won't be frequently removed after installation, double rings are suitable. circular ring vary in their handling depending on their shape and joining method, and are also used for applications where parts need to be opened and closed for attachment. Choose based on the required strength and ease of use.
Can double rings be used for meter reading?
While metal double rings will trigger a metal detector, needle detector compatible does not simply mean whether or not detection occurs. When using them in products, please check the sensitivity settings of the metal detector, the standards for normal products, and the management of metal components within the process.
