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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…

Surface treatment of aluminum alloy die casting parts

Surface treatment of aluminum alloy die casting parts Posted on : Sep 21 , 2022 By  GREFEE There is a series of surface treatment procedures before a aluminum alloy die casting part is considered as qualified to be used, such as de-burring, surface strengthening, etc. The following are the common surface treatment methods. Method 1: Aluminum phosphating Through a series of methods, including the SEM, XRD, potential time curve, film weight change and others to research on the influence of…

How to improve mold replacing efficiency of aluminum alloy die casting mold

How to improve mold replacing efficiency of aluminum alloy die casting mold Posted on : Sep28 , 2022 By  GREFEE Comprehensive preparation prior to the installation 1. According to the scheme of production, starting the inspection and maintenance conditions of die casing molds one or two days in advance (double check the key areas) to ensure the mold and accessories are ready. There is no aluminum chips, oil dirt and dust, etc. 2. Repairing the die casting molds after shutdown…

low-pressure injection molding and traditional injection molding?

What are the differences and applications between low-pressure injection molding and traditional injection molding? Posted on : Oct 20 , 2022 By  GREFEE Low pressure injection is a kind of method that utilizes low injection pressure (0.15-4MPa) to inject the material into the mold and quickly solidified and formed in an extremely short period of time (5-50 sec). Low pressure injection generally is not just merely refers to the injection products, but to use the other parts as inserts to…

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