Category: Manufacturing Technology knowledge

The connecting rod is a power functional component connecting the piston and the crankshaft. The small end of the connecting rod is connected with the piston through the piston pin, and the large end of the connecting rod is connected with the connecting rod journal of the crankshaft, and the gas pressure borne by the piston is transmitted to the crankshaft, so that the reciprocating motion of the piston is transformed into the rotary motion of the crankshaft. The shape of the connecting rod is irregular and complex, which makes it difficult to locate. The reducer is connected by a…

It is a forming processing method to apply external force to sheet, strip, pipe and profile through punch and die to produce plastic deformation and press bearing or separation, so as to obtain workpieces of required shape and size. The workpieces obtained are stamping parts. Stamping bearing is a forming and processing method of workpieces (stamping bearing stampings) of required shape and size, which are obtained by applying external force on plates, strips, pipes and profiles by press and die to cause plastic deformation or separation. Stamping and forging belong to plastic processing (or pressure processing), which is called forging.…

1. Roughness. The laser cutting section will form vertical lines. The depth of the lines determines the roughness of the cutting surface. The shallower the lines, the smoother the cutting section. Roughness not only affects the appearance of edges, but also affects the friction characteristics. In most cases, it is necessary to reduce the roughness as much as possible, so the shallower the lines, the higher the cutting quality. 2. Verticality. The perpendicularity of cutting edge is very important when the thickness of sheet metal exceeds 10mm. When away from the focus, the laser beam becomes divergent, and the cutting becomes…

Identification of thermoplastic rubber Burning rubber, dripping, flame, color, smell, burning speed, others There are drops of blue yellow top wax when the PE burns. There are traces when the nail is scratched PP burning drops blue yellow top diesel smell slow nail scratch without trace TPX burns with dripping blue/fast transparent as water PS burns with yellow styrene smell, fast coke and black smoke There are yellow styrene and rubber smell, fast coke and black smoke when burning HIPS The AS burns with yellow styrene, bitter fast coke and black smoke ABS burns with yellow bitter rubber smell, slow…

1、 Opening direction and parting line The opening direction and parting line of each injection molding product must be determined at the beginning of design to ensure that the core pulling slider mechanism is reduced as much as possible and the influence of parting line on the appearance is eliminated. 1. After the mold opening direction is determined, the stiffeners, buckles, bulges and other structures of the product shall be designed to be consistent with the mold opening direction as much as possible to avoid core pulling, reduce the seam line and extend the life of the mold. 2. After…

The term 3D is a popular technology in recent years, such as 3D film, display, scanning and 3D printing technology. Today, we will discuss what the 3D printing technology is. 3D printing technology is to divide the 3D model of an object into several layers through layered software in the computer, and then sinter or stick materials such as plastics, metals and even biological tissue active cells on a plane according to layered graphics through 3D printing equipment, and finally form an object layer by layer. Features of 3D printing technology: short production cycle, personalized manufacturing, diverse production materials, relatively…

PA12 polyamide 12 or nylon 12 typical application range: water meter and other commercial equipment, cable sleeve, mechanical cam, sliding mechanism and bearing, etc. Process conditions of injection mold: drying treatment: humidity shall be below 0.1% before processing. If the material is stored in the air, it is recommended to dry it in 85C hot air for 4-5 hours. If the material is stored in a closed container, it can be directly used after 3 hours of temperature balance. Melting temperature: 240~300C; Do not exceed 310C for materials with ordinary characteristics, and do not exceed 270C for materials with flame retardant…

PA6 polyamide 6 or nylon 6 Typical application range: It is widely used in structural components due to its good mechanical strength and stiffness. It has good wear resistance and is also used to manufacture bearings. Injection mold process conditions: drying treatment: since PA6 is easy to absorb moisture, special attention should be paid to drying before processing. If the material is supplied in waterproof packaging, the container shall be kept closed. If the humidity is greater than 0.2%, it is recommended to dry for 16 hours in hot air above 80C. If the material has been exposed to air for…

PC/ABS polycarbonate and acrylonitrile butadiene styrene copolymer and mixture Typical applications: computer and commercial machine housings, electrical equipment, lawn gardening machines, automobile parts dashboard, interior decoration and wheel covers). Injection mold process conditions: drying treatment: drying treatment before processing is necessary. The humidity should be less than 0.04%, and the recommended drying condition is 90~110C for 2~4h. Melting temperature: 230~300C. Mold temperature: 50~100C. Injection pressure: depending on the plastic part. Injection speed: as high as possible. Chemical and physical characteristics: PC/ABS has the comprehensive characteristics of PC and ABS. For example, ABS is easy to process and PC has excellent…