Frame: Specifically designed for holding the lenses (this part is absent in men's sunglasses). Its size is measured by the maximum distance of the horizontal inner diameter.
Frame leg: Its function is to ensure that the glasses are securely held on the ears. The size is determined by the extended length from the center of the frame hinge to the end of the frame leg.
Nose bridge: Connects the two sports glasses together for easy wearing. Its size is the shortest horizontal distance between the two frames.
Hinge (catch): This is used to connect the frame of the glasses and the temple. When wearing, the temple can be opened; when not in use, it can be closed and then stored.
(1) Specifications of the uv400 sunglasses:
The specific
(3) Production process of best spectacles
1. Metal frame processing procedure:
Design and development (drawing and sample production) - Mold and fixture processing (for stamping, cutting, and welding) - Component stamping (beams, headstocks, legs) - Cutting (deep processing, angles, dimensions, rings, etc. of components according to the drawings) - Welding (connection processing of various parts of the glasses) - Surface treatment before electroplating, grinding, and rolling - Electroplating processing - Assembly processing (installing support plates, printing grid patterns, installing foot covers, installing trays, shaping, cleaning, packaging)
ations and sizes of the eyeglass frames are as follows:
Lens ring size: Odd numbers range from 33 to 59mm, even numbers range from 34 to 60mm.
Nose bridge size: Odd numbers range from 13 to 21 mm, even numbers range from 14 to 22 mm;
Frame leg size: Odd numbers range from 125 to 155 mm, even numbers range from 126 to 156 mm.
2. Representation method: Box method and baseline method (general eyewear size identification)
Example: 56□14 - 140, represents:
Frame size: 56mm x 14mm; Nose bridge size: 14mm; Temple length: 140mm
54 (Frame size) - (Horizontal line method) 16 (Nose bridge size) 135 (Eyeglass leg length)
(2) Classification of eyeglass lenses:
According to the material and production process of the frame, they can be classified into four categories: metal frames, top rated running sunglasses, natural material frames and mixed frames.
(Metal frame, which is what we commonly refer to as a gold frame.)
The metal materials used for eyeglass frames include three categories: copper alloys, nickel alloys, and precious metals. They should possess certain hardness, flexibility, elasticity, wear resistance, corrosion resistance, light weight, luster and good color. Therefore, the metal materials used to make eyeglass frames are almost all alloys or those processed on the surface of the metal.
(2) Non-metallic materials: Mainly refer to acetate fiber eyeglass frames.
It includes two types: acetate fiber injection-molded frame (commonly known as plastic frame) and acetate fiber sheet frame (commonly known as sheet frame). Its characteristics are good transparency, easy coloring, easy polishing and processing, not prone to aging, non-flammable, and compatible with the skin.
The characteristics of plastic frames are as follows: the processing technology is simple, raw materials are saved, the price is relatively low, and they can be colored through methods such as dyeing, printing, and spraying; however, the durability of plastics is poor, and their plasticity and extensibility are both relatively poor.
The characteristics of the sheet frame are as follows: it has excellent smoothness and transparency, a beautiful surface, good toughness, high durability, good electrostatic performance, good compatibility with the skin, no allergic reaction, and a rich color range, including double-layer and triple-layer materials; however, the processing of the sheet is complex and the cost is high.
(3) Natural materials: The main natural materials used for making eyewear frames include tortoiseshell, special woods, and animal horns, etc.
Generally, wooden or horn frames are rarely seen. The most common type is the tortoiseshell frame.
The tortoiseshell material is made from the shells of tortoises found in tropical oceans and is used to make eyeglass frames. The main production area is the West Indies.
Its advantages include light weight, beautiful luster, easy processing and polishing, malleability when heated, ability to be joined when heated and pressurized, no irritation to the skin, durability and long-lasting quality, as well as preservation value. Among various eyewear frames, it is a high-end product and is very popular among middle-aged and older male wearers.
Its drawback is that it is prone to breaking compared to materials like celluloid, but it can be repaired by bonding after breaking. When displayed on the counter, it needs to be placed in water to prevent drying. During use, it cannot be cleaned with ultrasonic waves, otherwise it will turn white and lose its luster. Since tortoiseshell is an animal prohibited from being caught in the ocean, its production is limited and the price is high.
The price of tortoiseshell varies greatly depending on its quality. It can be classified into three types based on its color: top grade, superior grade and ordinary grade. The top grade is extremely rare and refers to pure golden yellow and pink; the superior grade includes light yellow, light brownish red and light coffee color; the ordinary grade is black or dark coffee color. The tortoiseshell frames should be as light as possible.
Advantages: Compact, anti-allergic. No allergic reaction will occur even if worn by anyone. High tensile strength. It will not deform and is not prone to breaking.
Disadvantages: The material is relatively brittle. When the temperature drops, it may sometimes develop cracks. The adjustment process is difficult and the repair takes a long time.
(4) The frame is made of a combination of metal and plastic.
These spectacle frames can be made in various ways. Some are wrapped with plastic over metal, that is, some parts or all parts are covered with celluloid; some use different materials in different parts of the frame, such as the front frame being made of plastic and the frame legs being made of metal, or the front frame being made of metal and the frame legs being made of plastic wrapped with metal; some use a combination of the above methods, for example, the brow bar and the bridge of the nose are made of plastic, the frame is made of stainless steel, and the frame legs are made of plastic wrapped with metal materials, etc.
The mixed frame design is exquisite and graceful, giving a sense of elegance. Due to the close contact between the outer plastic layer and the inner metal material, it is not flammable and enhances the strength of the frame.
2. Depending on the style, they are further classified into full-frame, half-frame, frameless, combined frame and folding frame types.
(1) Full-frame: This is the most commonly used type of eyeglass frame. Its features include being sturdy, easy to shape, and capable of concealing a portion of the lens thickness.
(2) Semi-frame: Also known as nylon wire frame. It is made with a very thin nylon wire as the frame edge. The lenses are specially ground, and the lower edge is smoothed out. There is a narrow groove in the middle, allowing the nylon wire to be embedded in the groove to form a frame without a bottom, thus making it very lightweight and giving a light and elegant appearance. It is also quite sturdy.
(3) Frameless: This type of frame has no lens ring. It only consists of a metal nose bridge and metal lens arms. The lens is directly connected to the nose bridge and lens arms via screws. Usually, holes need to be drilled on the lens. Frameless frames are lighter and more stylish than regular frames, but they are slightly less sturdy.
(4) Combination frame: There are two sets of lenses at the front frame. One of the sets can be flipped upwards. It is usually designed for both indoor and outdoor use.
(5) Folding frame: The spectacle frame can be folded into four sections or six sections. Most of them are reading frames.
