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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,…
Unibody application in electronic product industry
Unibody application in electronic product industry Posted on : Nov 23 , 2022 By GREFEE Unibody, also known as integrated molding or integrated body. Explanation for this principle is that one kind of mechanical operation technology that squeezes the aluminum alloy into board. Then, it is integrally formed by numerical control machine tool. This is mainly for the metal material (especially for aluminum alloys), which can produce parts with integrated structural features by CNC machining. This part is full of…
LPIM over molding DFM report
LPIM over molding DFM report Posted on : Oct 21 , 2022 By GREFEE Directory 1. The requirement of product 2. The analysis of the product feasibility and suggestion 2.1. demould direction for over molding 2.2. The question of A part I. Locating hole II. Thickness III.Tolerance of PCB. 2.3. The question of B part I. GAP II. Thickness III.Sharp edge to round IV.Tolerance of PCB V. undercut 2.4. The question of C part I. Plastic II. Thickness III.Sharp edge…
Analysis and Solution of Internal Stress of Injection Molded Parts
Analysis and Solution of Internal Stress of Injection Molded Parts Posted on : Oct 13 , 2022 By GREFEE Stress refers to the force acting on the object per unit area, which emphasizes the stress condition inside the objects. Generally, under the action of external stress, the inside of object will produce stress to agents the external force. When the object is not subject to external force, the stress exist inside is called the internal stress, which is caused by the…
Micro Foaming Injection Molding Process
Lightweight Design of Injection Parts: Micro Foaming Injection Molding Process Posted on : Oct 18 , 2022 By GREFEE At the moment, many technologies emerge in the lightweight field of automotive nonmetallic materials, such as micro foaming weight reduction technology, thin-walled weight reduction technology, low density weight reduction material technology, carbon fiber reinforced material technology, biodegradable material technology, etc. Compared to the structure optimization or manufacturing process upgrading, the focus of automotive enterprises and parts manufacturing industries are more on…
10 major processes to achieve product color
10 major processes to achieve product color Posted on : Oct 6 , 2022 By GREFEE 1. Bi-color and multi-color injection Bi-color injection molding is a classical forming technology, which uses two kinds of material to obtain the injection products and can achieve different appearance effect with various glossy and sensation. In addition, it is currently widely used as it improves efficiency, lowers the cost and provides higher degrees of design freedom. With the continual developement of products design and…