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Differences between liquid silica gel and solid silica gel
Differences between liquid silica gel and solid silica gel Posted on : Jan 14 , 2023 ， By GREFEE Liquid silica gel Compared with solid high-temperature vulcanized silicone rubber, the liquid silicone rubber is liquid rubber due to its good fluidity, fast vulcanization. Also, it is more environmentally friendly, and can fully meet the food level requirements. Solid silica gel The solid silica gel is a kind of saturated polymer elastic materials having multiple advantages, like high temperature resistance, cold…
Types and basic properties of rubber
Types and basic properties of rubber Posted on : Jan 31 , 2023 ， By GREFEE Natural rubber (NR) does not have melting point, which is usually be heated and softened gradually. It is completely softened at 130℃~140℃, becomes viscous fluid at 150 ℃~160 ℃, starts to decompose at 200 ℃, and starts to decompose rapidly at 270 ℃. Under normal temperature, natural rubber is elastic and gradually become hard as the temperature goes down. The elasticity is greatly reduced…
Summary of characteristics and uses of iron, zinc, magnesium, aluminum
Summary of characteristics and uses of iron, zinc, magnesium, aluminum, copper and other metals Posted on : Feb 3 , 2023 By GREFEE Iron casting — flowability There are few people pay attention to the sewer cover. The reason why iron casting is being widely used is that it has excellent flowability, and the characteristic of easy to cast. Iron casting actually is the name of a mixture of many elements, including carbon, silicon and iron. The higher the carbon…
Application of PP Modified Materials
Application of PP Modified Materials Posted on : Jan 3 , 2023 By GREFEE Polypropylene，simply known as PP, is a kind of material with notable advantages and disadvantages. Although PP and ABS both are commonly used materials so far, the performance of PP is not as balance as that of ABS. Thus, for some common applications of shell of products, the pure PP is obviously not as good as ABS. Advantages of PP 1.Advantages: 1. Low density, which is the…
Protection design of electronic products
Protection design of electronic products Posted on : Dec 30 , 2022 By GREFEE Environmental factors impact the military electronic products in use, transportation and storage significantly, while it also affects the stability and reliability of military electronics. The loss is astonishing if they are not properly protected. The American military have made statistics about the failure of electronic equipment, finding that above 50% failure is related to the environmental factors and thus tolerating harsh environment is a required lesson…
Metal injection Molding ,MIM
Metal injection Molding –MIM Posted on : Jan 6 , 2022 By GREFEE The metal injection molding, MIM, is a kind of forming method of injecting the plasticized mixture of metal powder and binder into the model. Modern plastic injection method is introduced into the powder metallurgy to form a brand new net shape processing technolgy for metal parts, which is a high technology developing fast in the powder metallurgy discipline and industrial field. First step of MIM is that selecting…
Introduction to Multi Component Injection Molding Process
Introduction to Multi Component Injection Molding Process Posted on : Dec 28 , 2022 By GREFEE Multi-component injectoin molding is also named as the multi color injection molding process, refering to the mateiral that has two kinds of color or more than two used for injection molding through a mold with one or more runners. At first, it is featured by two-color injection molding. Our daily contact is mostly two-color products. For example, the handle of the toothbrush we use…
Introduction to blistering
Introduction to blistering Posted on :Dec 23 , 2022 By GREFEE Blistering is a kind of plastic processing technique, during which the flat PVC, PS, PET and other resin sheets are heated and softened in the blister forming machine, and then vacuum absorbed on the mold surface. It is formed according to the shape of the die, and then stamped into a single product with a knife die on the punch, and finally made into packaged products through folding, punching…
Stamping Process and Product Design
Stamping Process and Product Design Posted on : Dec 17 , 2022 By GREFEE Classification of Stamping ProductsProcess 1.Classification of Basic Operation According to its deformation properties, stamping process includes material separation and forming. Separation means the blank will deform when it is under stamping force and the blank will be fractured and separated when the stress of deformed area reaches to tensile strength, then the workpieces of required shape and size are obtained. Forming process is a stamping process…
Requirements of Electroplated Plastic Parts
Requirements of Electroplated Plastic Parts Posted on : Dec 13 , 2022 By GREFEE Electroplate parts designs 1.The ideal selection of base materials is electroplated ABS. Normally, Chi Mei ABS727 is often used. ABS 757 is not recommended as the ABS757 screw post is easily to crack. 2.The surface quality must be qualified. Electroplating cannot cover up some defects of injection but will make it more obvious. 3.The screw holes of electroplating parts is made by resistance plating process to…
Analysis of cracking phenomenon of plastic screw bar and preventive measures
Analysis of cracking phenomenon of plastic screw bar and preventive measures Posted on : Dec 20 , 2022 By GREFEE Cracking phenomenon of plastic screw column is a common plastic structure failure phenomenon. It is tricky to fix it as once the cracking occurred, it is hard to make up. What is the most tricky issue is the cracking is not to detected as easy as other defects of plastic parts as soon as the injection molding is completed. In…
Common Riveting Applications of Plastic Parts
Common Riveting Applications of Plastic Parts Posted on : Dec 3 , 2022 By GREFEE For the riveting of plastic parts, the main body is plastic parts, and the connected parts include plastic parts, metal parts (such as metal sheets), electrical components (such as PCB boards), fabrics (such as mesh cloth), etc. The riveting does not require additional rivets or riveting posts and other accessories like metal riveting, but directly grows plastic structures on the plastic body, such as columns…