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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…
Structural Design of Plastic Injection Parts – Wall Thickness
Structural Design of Plastic Injection Parts – Wall Thickness Posted on :Dec 21 , 2022 By GREFEE Definition of wall thickness Wall thickness is a basic structural characteristic of plastic parts. If the outer surface of plastic parts is called the outer wall, the inner surface is called the inner wall, then there is a thickness value between outer and inner walls. The value is called the wall thickness. The value entered when the shell is extracted on the software…
Four things you need to know about ultrasonic welding
Four things you need to know about ultrasonic welding Posted on : Dec 1 , 2022 By GREFEE Metal welding Welding: welding makes the two separated objects produce the binding force between atoms together by heating or compressing or both, rather than filling materials.There are a variety of them, which traditionally means the welding of metals. It has more than 40 types, which includes fusion welding, pressure welding and brazing according to the process of welding. 2. Pressure welding Under…
Punch System for High Vanuum die casting
Punch System for High Vacuum Die Casting Posted on :Dec 7 , 2022 By GREFEE Vacuum die casting is the necessary technology for high quality aluminum die casting pieces, such as cylinder body, automatic transmission housing, valve body, etc, especially for automotive parts that require T6 Heat treatment and welding. The gas content of castings should be controlled within 0.5cc/100g, which has strictly requirement for high vacuum during mold filling (vacuum degree is below 50 mbar). It is difficult to…
Designing Elements and Process Flow of Die Casting Die
Designing Elements and Process Flow of Die Casting Die Posted on : : Nov 12 , 2022 By GREFEE Die casting mold is the important process tool in die casting production. The metal fluid is cooled and cursed in the die casting mod and finally comes into the die casting parts. The shapes, sizes, quality and smoothness of die casting production of parts are all related to the die casting mold. Thus, the design of die Casting mold is essential. 1、 Basic…
How the position of gate affects the quality of injection molding products ?
How the position of gate affects the quality of injection molding products ? Posted on : Nov 16 , 2022 By GREFEE Gates are essentials to the injection molding system and the types and sizes directly affect the quality of products and the costs. There are a wide variety of gates and the sizes of them are slightly different. Meanwhile, its characteristics and application status are different, too. The quality of parts are related to the shapes, sizes and feeding…
Waterproof and dust-proof for sheet metal motor cabinet
Waterproof and dust-proof for sheet metal motor cabinet Posted on :Nov 21 , 2022 By GREFEE When planning these sheet motor cabinet of electronic devices, the planner should fully consider the protection of the cabinet according to its level of protection. Note: air ducts and structural joints are the main ways for water and dust to enter and reach the specified amount under any conditions. For instance, door seam, cable inlet and outlet, structural member joint, etc. Thus, these areas…
10 performance testing methods for plastic materials
10 performance testing methods for plastic materials Posted on :Nov 19 , 2022 By GREFEE 10 performance testing methods for plastic materials 1. Ash test Ash: when the polymer is burnt at high temperature, a series of physical and chemical changes occur till the volatilization of organic components and inorganic components (mainly inorganic salts and oxides)left. The left components are called ash. Generally, ash in modified products means inorganic minerals, such as silica, calcium carbonate, talc, glass fiber, titanium dioxide,…