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Five processes of injection mold manufacturing

Injection mold manufacturing process refers to the process of injection mold processing and assembly through certain processing technology and process management. Injection mold manufacturing process includes five steps: First, production technology preparation Production technology preparation is the basis of the entire production, for injection mold quality, cost, schedule and management have a significant impact. The preparation of production technology includes the design of injection mold drawing, the preparation of technical documents, the formulation of material quota and processing time quota, the evaluation of injection mold cost and so on. Two, the preparation of materials Prepare materials to determine the type, form, size and related technical requirements of the blank of injection mold parts. Three, injection mold parts, components processing Injection mold parts are punch, concave die, punch fixed plate, discharge plate. Punch, concave die is directly working parts, punch fixed plate as the name implies is used to fix the punch, discharge plate is used to remove the workpiece and waste material set on the punch. Iv. Assembly and debugging Define the work responsibility of assembly and debugging team of production department, finish the assembly and debugging of injection mold with high quality according to the production schedule. Five, mold test identification Mold test to evaluate the rationality and correctness of injection mold design and manufacturing quality, whether the injection mold can meet the expected functional requirements.

2021-08-06

Failure analysis of injection mold materials

General mold manufacturing includes mold design, selection of materials, heat treatment, machining, debugging and installation processes. According to the investigation, the material used and heat treatment are the main factors affecting the service life of the die. From the perspective of total quality management, the factors affecting the service life of the die can not be measured as a polynomial sum, but should be the product of many factors, so the quality of the die material and heat treatment in the whole die manufacturing process is particularly important. From the analysis of common phenomenon of mold failure, wear failure, local deformation failure and fracture failure may occur in the process of service of injection mold. The important failure forms of injection mold can be divided into wear failure, local plastic deformation failure and fracture failure.

2021-08-06

Plastic mold classification

The spout of plastic mold can also be called the spout, which refers to the combination part of the frame and parts formed by the factory when casting the model. It can be divided into large spout and fine spout Plastic mold is divided into: big nozzle mold, fine nozzle mold, hot runner mold. 1. Big nozzle mold: the runner and gate are on the parting line, and the product is demoulded together when opening the mold. The design is the simplest, easy to process, and the cost is low, so more people use the big nozzle system. 2, the nozzle mold: the runner and the gate are not on the parting line, generally directly on the product, so it is necessary to design a group of nozzle parting line, the design is more complex, the processing is more difficult, generally choose the nozzle system according to the requirements of the product. 3. Hot runner mold: Such mold structure to be about equal to the fine shuikou, the biggest difference is that the flow is in one or more have temperature and heat flow but heat pumping mouth, no cold feeding demoulding, runner and gate directly on the product, so the port don't need mold release, also known as no runner system, this system can save raw materials, applicable to the raw material is more expensive, high requirement of products, design and processing difficulties, The mold cost is high.

2021-08-06

Surface treatment technology of aluminum alloy

Surface treatment includes spraying, polishing, drawing, high light cutting, anodizing, two-color anodizing and other processes. The purpose of mechanical treatment is to eliminate the uneven surface of the product and remedy other bad appearance. Chemical treatment to remove the oil rust on the surface of the product, and the formation of a layer can make a better combination of film forming substances or into active metal body, to ensure that the coating has a stable state, increase the binding force of the protective layer, so as to protect the body. 1. Sandblast The process of cleaning and coarsening metal surfaces using the impact of high-speed sand flow. This method can make the surface of the aluminum parts to obtain a certain cleanliness and different roughness, improve the fatigue resistance of the workpiece, the adhesion between the coating is strong, prolong the durability of the coating film, but also conducive to the smooth coating decoration. 2. The polishing A process in which the surface roughness of the workpiece is reduced by mechanical, chemical or electrochemical methods in order to obtain a bright, flat surface. 3. The drawing Metal wire drawing is a manufacturing process in which aluminum sheets are repeatedly sanded out of the wire. Drawing can be divided into straight line drawing, random drawing, spiral drawing, thread drawing. 4. High light cutting The diamond cutter is reinforced by the fine carving machine in the high speed rotation (general speed of 20000 RPM) on the spindle of the fine carving machine to cut parts, resulting in a local highlighting area on the surface of the product. In recent years, some high-end electronic products, such as TV metal frame using high light milling process, coupled with anodic oxidation and wire drawing process, make the WHOLE TV full of fashion sense and sharp sense of science and technology. 5. Anodic oxidation Anodic oxidation refers to the electrochemical oxidation of metal or alloy, aluminum and its alloy in the corresponding electrolyte and specific process conditions, due to the action of the impressed current, aluminum products (anode) on the formation of a layer of oxide film process. Anodic oxidation can prolong the service life of aluminum and enhance the aesthetic, is the most widely used and very successful process. 6. Dual color anodic oxidation Two-color anodizing refers to anodizing a product and giving specific areas different colors. Double-color anodic oxidation has high cost because of its complex process. But through the contrast between the two colors, more can reflect the high-end, unique appearance of the product.

2021-08-06

What are the commonly used metals for CNC batch processing?

CNC CNC processing is also called computer gong, the main work is the preparation of processing programs, the original manual work into computer programming, can greatly reduce the number of tooling, processing quality and precision stability, very suitable for many varieties, small batch parts processing, also known as CNC batch processing. The main metal materials suitable for CNC batch processing are: Aluminum alloys include AL6061 and AL 7075, among which AL 7075 has higher strength and better performance than AL6061. Copper has red copper (pure copper) and brass, among which red copper has excellent electrical conductivity and welding, and brass has high strength and mechanical properties of cutting. Steel has 45 steel, 40Cr steel, Q235 steel and stainless steel 303/304, of which 45 steel has higher strength and better machinability; 40Cr steel is widely used in machinery manufacturing industry. Q235 steel is a carbon structural steel, this steel can be used directly without heat treatment; Ss303/304 has good processing performance and high toughness. If you want to achieve rust prevention function, you can choose this type of steel.

2021-08-06

What is the difference between aluminum alloy and magnesium alloy?

Metal has been widely used in China, among which the characteristics and applications of different types of metal are also different. So, what is the difference between an aluminum alloy and a magnesium alloy? What is aluminum alloy? Aluminum alloy density is low, but the strength is relatively high, close to or more than high quality steel, good plasticity, can be processed into a variety of profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance, widely used in industry, the amount of use is second only to steel. Aluminum alloy is one of the most widely used non-ferrous structural materials in industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. What is magnesium alloy? Magnesium alloys are alloys based on magnesium with other elements added. Its characteristics are: low density (about 1.8g/cm3 magnesium alloy), high strength, large elastic modulus, good heat dissipation, good shock absorption, impact load capacity than aluminum alloy, organic and alkali corrosion resistance. Mainly used in aviation, aerospace, transportation, chemical, rocket and other industrial sectors. What is the difference between aluminum alloy and magnesium alloy? 1. Different tensile strength The frame strength made of magnesium alloy material of the same volume is not as good as aluminum alloy. To achieve the frame strength, material thickness and tube length should be increased. Therefore, magnesium alloy has no advantage compared with aluminum alloy in terms of weight. 2. Different fatigue strength The durability of the same volume magnesium alloy frame is worse than aluminum alloy frame. It is also a fatal flaw of magnesium alloys. With the more times of riding, the more times of stress will occur, and the strength will be significantly reduced, and even the frame life will not exceed 2-3 years. Therefore, professional riders rarely use magnesium alloy frame, and if they use magnesium alloy frame in competition, they will be replaced by discarding it according to the mileage. 3, metal oxidation is different The periodic table clearly shows that magnesium alloys are more easily corroded by oxidation than aluminum alloys. 4. Different manufacturing costs Magnesium alloy is an active metal, so the manufacturing equipment and environment have higher requirements, resulting in high manufacturing costs, and the cost performance of the bicycle frame produced is far less than aluminum alloy frame. 5. Different specific gravity density Magnesium alloy has the advantage of being lighter than aluminum alloy in the same volume.

2021-08-06