Category: Rubber Products knowledge

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…

1、 Mold kernel and mold embryo 1. Before the mold embryo is disassembled, check whether its model and size conform to the drawing, and then mark the mold number and template serial number on the diagonal of the reference angle. It is required to mark the mold number on the square iron mill of each set of mold; Each set of mold guide pillar must also be engraved with mold number with a grinder; The bottom of the guide sleeve is provided with an exhaust groove; The four corners of plate B require the skid pit to be milled, with…

Heat treatment refers to a metal thermal processing process that changes the chemical composition and structure on the surface or inside of materials by means of heating, heat preservation and cooling in the solid state to obtain the required properties. 1. Normalization: Heat the steel or steel parts to the appropriate temperature above the critical point Ac3 or Acm for a certain time and then cool them in air to obtain pearlite like structure. 2. Annealing: heat the hypoeutectoid steel workpiece to 20~40 ° C above AC3, and after a period of heat preservation, slowly cool it in the furnace (or…