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These variables in injection molding must be strictly controlled or rework costs are high
Re-grinding refers to materials that have been processed at least once, and then the gate, waste, etc. are ground or shredded. Please note that even the most "primitive resins" may have one or more processing histories, because they are compounded and pelletized during manufacturing.
2021-10-28
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The Preferred Structure Of Aircraft Aluminum Alloy 7A09
Among the aluminum materials for aerospace vehicles in China, 7A09 alloy is one of the preferred high-strength alloys for the main stressed structural parts. The semi-finished products available include plates, strips, bars, profiles, thick-walled tubes, forgings, etc. The chemical composition is more reasonable than that of 7A04 alloy, so it has superior comprehensive performance and becomes one of the designer's main materials. Its chemical composition (mass%): 0.5Si, 0.5Fe, (1.2—2.0) Cu, 0.15 Mn, (2.0-3.0) Mg, (0.16-0.30) Cr, (5.1-6.1) Zn, 0.10Ti, other impurities are individually 0.05, totaling 0.10, and the rest is Al.
2021-10-16
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Can ultrasonic welders meet the challenges of medical processing?
As equipment becomes more and more complex, ultrasonic welding is playing an increasingly important role in the medical industry, including global medical equipment including drug delivery equipment, orthopedic surgical instruments, chest drainage tubes and catheters.
2021-10-28
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7A04 Alloy - Yield Strength Close To Tensile Strength
7A04 alloy is an Al-Zn-Mg-Cu series heat-treatable aerospace super-hard aluminum alloy, which can be heat-treated and strengthened. Its composition has been listed in GB/T3190-2008, and it is compatible with the B95 alloy of the Soviet Union and Russia and the AlZnMgCu1 of Germany. .5.3.4365 alloy is equivalent, because in 1944 the Soviet Union’s 95th factory successfully trial-produced this alloy semi-finished product, hence the name B95 alloy. In 1957, China Northeast Light Alloy Co., Ltd. (then Harbin Aluminum Processing Plant) produced this alloy with the help of Soviet experts. Alloy plates and extruded materials.
2021-10-09
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Three Advantages Of The "High-Strength Arc" Cover Of The Electrolytic Cell
PTJ Hardware 420kA electrolytic aluminum large-scale pre-baked tank cover is a "flat type" cover used in the initial construction. After 5 years of operation, its weaknesses have gradually emerged, with low strength, severe deformation, and poor airtight insulation, resulting in poor operational safety and low energy conservation and environmental protection effects in production. For this reason, in 2018, the company replaced all 296 electrolytic cell cover plates step by step with "high-strength thermal insulation and energy-saving arc" cover plates.
2021-10-16
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The Rapid Heating Method For Assembling Aluminum Electrolytic Cell Cathode Carbon Block
In the assembly of the cathode carbon block of the aluminum reduction cell, it is necessary to assemble the cathode steel rod in the dovetail tank of the carbon block. For the effective combination of the steel rod and the carbon block, the carbon block must be heated to 50-60°C. The current practice is to build a heating furnace in which the cathode carbon block is heated as a whole.
2021-10-16
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The Utilization Technology Analysis Of Secondary Aluminum Ash In Electrolytic Aluminum
The secondary aluminum ash of electrolytic aluminum is a hazardous waste containing a large amount of toxic and hazardous substances such as fluoride, cyanide, aluminum carbide, and aluminum nitride, and its treatment has always been a research focus in the electrolytic aluminum industry.
2021-10-09
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USA Researchers Extract Rare Earth Elements From phosphogypsum
Rare earth elements, known as industrial vitamins, are indispensable manufacturing materials for many high-tech equipment such as mobile phones and computers. The world's rare earth element reserves are not abundant and unevenly distributed, and they are in a state of supply shortage for a long time. Recently, American researchers published a research report in the online edition of the Journal of Chemical Thermodynamics, stating that they have developed a method for extracting rare earth elements from industrial waste-phosphogypsum, which may ease the tight supply of rare earth elements.
2021-10-16
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How To Deal With Wastewater Discharged From The Metal Industry?
The main source of zinc in metal processing wastewater is electroplating or pickling tow liquid. The contaminants are transferred to the rinsing water through the metal rinsing process. The pickling process includes immersing the metal (zinc or copper) in a strong acid to remove oxides on the surface, and then immersing it in a brightener containing strong chromic acid for brightening treatment.
2021-10-23
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The Influence Of Temperature On Aluminum Alloy Passivation Process
Aluminum alloy passivation is in the process and temperature plays a very important role in the passivation effect. The influence of temperature exists in the pretreatment and passivation process of passivation. To do a good job in passivation of aluminum alloy, the temperature cannot be ignored. Important elements, so it is absolutely necessary to discuss the influence of temperature in the passivation process.
2021-10-16
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GPC Test Method For High Temperature Resistant Polyamide Pa10t
Gel Permeation Chromatography (GPC) is one of the most effective and commonly used methods for testing the molecular weight and molecular weight distribution of polymer materials. In order to obtain accurate test results, the test sample must have good solubility in the GPC mobile phase solvent. PA is one of the most used engineering plastics. However, due to intermolecular hydrogen bonding, the solvents that can dissolve PA are very limited.
2021-10-23
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Magnesium Alloy Electronic Welding And Laser Welding
During electron beam welding, magnesium vapor is immediately formed under the electron beam, and the molten magnesium flows into the small holes produced. Due to the high vapor pressure of magnesium alloys, the small holes produced are often larger than those of other metals, which are easy to be in the weld. Stomas are formed at the roots. Therefore, the process parameters should be carefully operated and controlled to prevent overheating from causing pores.
2021-10-16
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