The 75MN horizontal short-stroke front-loading single-action aluminum alloy profile extrusion machine adopts a horizontal three-beam and four-column prestressed composite frame structure, a forward extrusion method, direct drive by an oil pump, and is equipped with advanced foreign electromechanical and hydraulic control components and systems, and The complete set of mechanized auxiliary equipment adopts PLC and computer two-level control to accurately control the speed, position and pressure of the press. The technology used embodies the development trend and advanced technology level of contemporary extrusion presses, and is suitable for production. Manufacturing, operation and maintenance are conducive to improving production efficiency and reducing usage costs.

Prestressed composite frame

The stress-bearing frame of the Aluminum extrusion machine body consists of an integral front beam ZG35Mn (thickness 1950mm) and a rear beam thickness 1800mm (materialZG35Mn), square prestressed sleeve (material ZG35) is a closed prestressed composite frame. Special hydraulic preloading tools are used to pull the An over-pressure tensile load is applied to the entire length of the rod, and compressive stress is applied to the pressure sleeve at the same time, so that the entire frame is in a stress pre-tightened state.The column prestress is above 115% of the maximum load.

(1) The center distance of the four stressed tie rods of the frame is symmetrical to the center of the press, so that the entire frame is stressed evenly. This can increase the squeeze

Accuracy of pressed products.

(2) Since the frame has a large bending resistance section, under the action of extrusion force, the frame elongation and bending deformation are small, so it is the frame can be fixed with horizontal and vertical guide rails at the bottom of the extrusion beam and extrusion barrel.

The centering adjustment is very convenient, and the upper frame can be used as an X-shaped moving guide rail for the extrusion barrel.

(3) There are two sets of elastic anchoring devices and foundation anchors at the lower part of the rear beam to make the rear beam fixed reliably.

Main working cylinder/side cylinder

1. The main working cylinder of aluminum extrusion press is a plunger cylinder, which is fixed to the center of the rear beam through four pressing blocks. The plunger diameter is Φ1740mm, and the medium pressure is 28Mpa. Under the action, it can produce 66.55MN extrusion force. The cylinder body is made of 20MnMo forged steel. After forging and tempering treatment in three sections, it is buried Arc narrow gap welding, processed according to GB\T6402\2008 II level flaw detection. The main plunger is made of forged steel. The outer surface Stainless steel cladding is welded to 2Cr13 with medium frequency treatment, surface hardness is HRC46~48, and polishing degree is 0.2um. V-ring used for master cylinder seal Combined seal, using copper sleeve inner guide

2. The two main side cylinders are horizontally fixed on both sides of the rear beam main working cylinder. The diameter of the side cylinder is Φ450/Φ320mm, which generates an extrusion force of 8.9MN and a return force of 4.4MN, which can realize the rapid forward, backward and extrusion of the main plunger. The cylinder block and piston rod are made of 45 forged steel quenched and tempered. The two-way seal and piston rod seal of the combined piston head adopt V-ring combined seals, and are guided by copper sleeves.

Hydraulic transmission and control system pump station

The pump station of the Aluminum extrusion press adopts an integrated design and is centrally arranged under the rear part of the oil tank of the press. It is composed of an imported German Rexroth electro-hydraulic proportional control axial piston variable pump and a Chinese-made stainless steel plate circulation filtration and cooling system. The piping system design adopts necessary buffering and anti-shock measures, such as cushioning pads, hoses or shock-absorbing hoses, and flexible rubber pipe joints that can absorb vibration. The main system consists of 10 355L/min plunger pumps and 10 320L/min vane pumps from the German REXROTH company. They are designed to be arranged and matched in a certain combination. They can generate a pressure of 28Mpa and a flow rate of 3350L/min to meet the needs of main and side work. According to the cylinder operating speed requirements, closed-loop adjustment of the extrusion speed of 0~21mm/s is achieved, and the extrusion barrel locking cylinder is matched with a dedicated oil pump. Isolation control valves are designed between each oil pump group. If the two mechanisms need to operate at the same time according to the program, they can not interfere with each other. It can realize functions such as isolation between pumps, no-load starting, pressure regulation and overload protection. The pump head electro-hydraulic proportional valve and electronic control device are imported with the main pump and connected with the press main control computer to achieve online control. The main oil cylinder, auxiliary oil cylinder, spindle cylinder, and scissor oil cylinder are integratedly controlled by logic valves. The sliding mold and supporting frame are integratedly controlled by three-position four-way electro-hydraulic reversing valves. Main hydraulic components: master cylinder reversing surface valve, overflow surface valves etc. The main control system oil pump station has a total flow rate of 3350L/min, and its oil pumps are individually controlled.

The design of each aluminum extrusion machine is to maximize the use of resources under the premise of ensuring quality, and has been in a leading position in the industry.

Salt and Sand Spreader - a solution for efficient and spreading of salt and sand. Designed with utmost expertise, this revolutionary product is built to enhance your snow removal tasks and ensure safe and-free pathways, driveways, and roads during winter.

Equipped with the advanced T-SPR-250 technology, this salt spreader sets the bar high when it comes to versatility and performance. With the optional tow bar, it offers seamless mobility, making it compatible with a wide range of vehicles. The 3-point suspension, categorized as I/II, provides stability and ensures smooth operation in any terrain.

One of the standout features of this incredible spreader is the innovative design of its rotor. Powered through the left wheel, it guarantees efficient salt and sand distribution. What sets it apart is the incorporation of studded tires, which automatically disengage the roller drive when the unit moves in reverse. This not only ensures safety but also avoids wasteful overuse of the salt or sand.

Furthermore, the rotor action can be effortlessly deactivated through a fitting on the wheel, offering unprecedented control and flexibility. Whether you need to switch between materials or adjust the spreading rate, this intelligent mechanism grants you unparalleled precision.

Don't compromise on the quality and effectiveness of your winter maintenance. With the Salt and Sand Spreader, you can say goodbye to uneven application and hello to impeccable results. Its impeccable construction, coupled with its ability to distribute salt and sand evenly, guarantees enhanced traction and minimized accidents caused by icy conditions.

Choose the Salt and Sand Spreader and make snow removal a breeze. Experience the power of cutting-edge technology combined with superior craftsmanship. Ensure the safety and well-being of your community with a product that surpasses expectations and sets a new standard in snow management.

Stay ahead of the curve this winter. Invest in the Salt and Sand Spreader today and witness the difference it can make in transforming your snow removal experience. Act now and let the outstanding performance of this premier spreader speak for itself.

An automatic UV sterilizer is a machine that utilizes ultraviolet light to kill bacteria. It has such as high efficiency, safety, and environmental friendliness. It is suitable sterilization treatment of various bottled and canned food, beverages, medicines, and other products. It can eliminate microorganisms such as bacteria, viruses, and parasites to ensure the quality and safety of the products.

The scientific principle behind UV disinfection mainly targets the DNA of microorganisms, disrupting their DNA and rendering them unable to reproduce and replicate, thus achieving the purpose of sterilization and disinfection.

 

The machine typically consists of a conveyor belt, UV sterilization lamps, and a control system. During operation, bottled or canned products enter the sterilization chamber via the conveyor belt, and the UV sterilization lamps irradiate the surfaces of the products, killing the microorganisms present. The entire sterilization process is conducted in a closed environment, ensuring the hygiene and quality of the products.

 

The automatic UV sterilizer has the following advantages:

 

• Efficient sterilization: Ultraviolet light possesses high energy and penetration, capable of killing various microorganisms, including bacteria, viruses, and parasites.

 

• Safety and environmental friendliness: UV sterilization does not produce chemical residues and is harmless to the environment and human health. However, when used in non-sealed conditions, it can still be harmful to the human body. Please pay attention to safety and use with caution.

 

• Easy operation: The machine is equipped with an intelligent control system that enables automated operation and monitoring, thereby improving production efficiency.

 

• Strong adaptability: The UV sterilization machine is suitable for products of different shapes and sizes. The position and quantity of the sterilization lamps can be flexibly adjusted.

In practical applications, the equipment can be used for sterilizing surfaces and air, and it is widely applied in multiple fields such as powdered milk processing plants, food factories, cosmetics factories, dairy farms, breweries, beverage factories, and bakeries.

 

As people's demands for food health and quality continue to rise, the application of automatic UV sterilization machines will become increasingly widespread. Utrust pack has been committed to research and innovation in the field of food can packaging, adhering to the concept of "beyond needs, we aspire for deeds" and continuously making higher-quality can packaging solutions for customers.

The stable operation of the hydraulic system is essential for the entire production process. As the "blood" of the hydraulic system, the cleanliness of hydraulic oil directly affects the performance and life of the system. Hydraulic Oil Filter Machine as a powerful assistant for hydraulic oil cleaning, has become an important "cleaning guard" in industrial production with its performance and efficient filtration capacity.

​

The main function of the Hydraulic Oil Filter Machine is to remove impurities, moisture and harmful substances from the hydraulic oil by physical or chemical means to ensure the cleanliness of the hydraulic oil. Its working principle is to send the hydraulic oil to be filtered into the filtration system through the oil pump, and finally deliver the clean hydraulic oil back to the hydraulic system through the layers of filtration elements of multi-stage filtration elements. This filtration method can not only effectively remove impurities and contaminants from the hydraulic oil, but also extend the service life of the hydraulic system and improve the stability and reliability of the system.

 

Hydraulic Cleaning overcomes traditional hydraulic oil filtration methods. First of all, it has a high filtration efficiency, which can quickly remove impurities and contaminants from the hydraulic oil, ensuring the cleanliness of the hydraulic oil. Secondly, the filter has a long service life and low maintenance costs, which can reduce the operating costs of enterprises. In addition, the filter also has intelligent control and remote monitoring functions, which can monitor the cleanliness of the hydraulic oil and the operation status of the filter in real time, which is convenient for users to manage and maintain.

 

In industrial production, Hydraulic Oil Cleaning are widely used. Whether in the fields of automobile manufacturing, mechanical engineering or petrochemical engineering, hydraulic systems are used. The Hydraulic Oil Filter Machine can ensure the stable operation of the hydraulic system, improve production efficiency and product quality. In addition, in some special fields, such as aviation, aerospace, etc., the cleanliness of hydraulic oil is required, and the filter plays an irreplaceable role.

 

The Hydraulic Oil Filter Machine has become an important "cleaning guard" in industrial production with its filtration performance, intelligent control mode and wide range of application fields.

Typically, the cooling fan is connected to the system through a three-wire interface, which includes a power cable, a ground cable, and a Tach cable (speed signal cable). In order to be able to read Tach signals through GPIO, you need to select a fan that supports this feature. Such fans are often referred to as "ach-enabled" (supporting Tach) or "RPM-sensing" (supporting speed detection) fans.

The Tach signal is a pulse signal whose frequency is proportional to the speed of the fan. Typically, a pulse signal is generated for each rotational speed cycle. Here are some steps to help you implement a cooling fan that reads Tach signals via GPIO:

1, Make sure that the fan you choose supports Tach function or speed detection function. You can find this information in the fan specifications and instructions.

 

 

 

2. Connect the Tach wire of the fan to the available GPIO pin. This usually requires the use of cables or connectors.

 

 

 

3, Use the appropriate hardware interface circuit to convert the fan's Tach signal into a digital signal that can be read. This is because GPIO typically operates at the digital signal level.

 

 

 

At Chungfo Electronic Technology Co., LTD., we not only provide high quality waterproof exhaust fans, but also various sizes small exhaust fan price are affordable . It can't be ignored that our brushless exhaust fans not only have excellent performance, but also energy saving and environmental protection.

To find the best price on an Electron Spin Resonance (ESR) spectroscopy, you can follow the steps below:

 

1. Explore search platforms

The most direct way is to search for “Electron Spin Resonance (ESR) spectroscopy best price” on major search engines like Google. Use words like cheap, sale, affordable, etc. to describe your needs, and it will be straightforward to find the right EPR spectroscopy at a recognized price, such as the one shown below:

 

2. Explore online B2B marketplaces

Check out online marketplaces that promote scientific instruments. These platforms allow users to find and compare prices for various scientific techniques, including ESR spectroscopy. Examples include GlobalSpec, DirectIndustry, etc. For example:

 

3. Request multiple quotes

When contacting agencies, EPR manufacturers, or vendors, request quotes from multiple sources. Provide them with specific details about the project, including sample type, sample size, data analysis needed, and any special requirements. Comparing multiple quotes will help you find the best price. Many EPR suppliers offer free, comprehensive, customized quotes, such as CIQTEK EPR.

 

4. Consider geographic location

The price of EPR Spectroscopy may vary by region or country. Sometimes, purchasing EPR Spectroscopy from a country with lower labor or equipment costs can result in significant cost savings. For example, CIQTEK's self-developed EPR Spectroscopy has the world's leading EPR technology to maintain high-quality service globally for any customized service and has a very competitive price.

 

5. Research Local Academic Institutions

Contact nearby universities, colleges, and research institutions to inquire about their ESR spectroscopy services. Academic institutions often offer advanced scientific equipment at reasonable prices, especially for researchers and students.

 

6. Collaborate with researchers

Consider collaborating with researchers who have access to ESR spectroscopy equipment. Many researchers are open to collaboration or offer their services at a discounted rate, especially if your project aligns with their interests. Attend scientific conferences, workshops, or networking events to connect with the relevant research community.

 

Keep in mind that while cost is an important factor, ensuring that the service provider delivers reliable, accurate results is also critical. Evaluate their technical expertise, reputation, and experience before deciding.

Scanning electron microscopes (SEMs) are highly advanced and sophisticated scientific instruments that provide high-resolution imaging and analysis of samples at the nanoscale level. There are several renowned scanning electron microscope brands available in Europe that offer state-of-the-art SEMs. Here are a few notable brands:

 

FEI Company (Thermo Fisher Scientific): FEI Company is a leading provider of high-performance electron microscopy solutions. They offer a range of SEMs, including the highly regarded "Quanta" series, known for their exceptional imaging capabilities and versatility.

 

Zeiss Microscopy: Zeiss is a renowned German manufacturer of various optical and electron microscopy instruments. Their SEMs, such as the "MERLIN" and "EVO" series, are known for their advanced imaging technologies, user-friendly interfaces, and precise analytical capabilities.

 

Hitachi High-Tech: Hitachi is a well-established Japanese company with a strong European presence. Hitachi SEMs, like the "SU5000" and "TM4000," are known for their excellent imaging quality, robustness, and a wide variety of applications.

 

JEOL Ltd.: JEOL is a global leader in electron microscopy and analytical instrumentation. Their SEMs, including the "JSM" series, are renowned for their high-resolution imaging, advanced analytical capabilities, and user-friendly interfaces.

 

CIQTEK: CIQTEK is a global supplier and manufacturer of scanning electron microscopes and other high-end analytical instruments. Their tungsten filament scanning electron microscope SEM3200, field emission scanning electron microscope SEM4000 / SEM5000, ultra-high resolution field emission scanning electron microscope SEM5000X, and focused ion beam scanning electron microscope DB500, are high-performance and at competitive prices. 

 

TESCAN: TESCAN is a Czech company that specializes in manufacturing SEMs and other electron microscopy instrumentation. Their SEMs, such as the "VEGA" and "MIRA" series, are esteemed for their outstanding image quality, accurate sample manipulation, and extensive imaging modes.

 

These are just a few reputable brands offering scanning electron microscopes in Europe. Prices for SEMs in Europe can vary significantly depending on specifications, accessories, and additional features. It's recommended to directly contact the manufacturers or authorized distributors to obtain accurate pricing information based on the specific requirements.

Electron paramagnetic resonance (EPR) spectroscopy is a powerful technique used to study the electronic structure of paramagnetic substances. It provides valuable insights into the nature and interactions of unpaired electrons in magnetic fields. Selection rules in EPR spectroscopy establish conditions that allow or prohibit leaps between different energy levels. Understanding these selection rules is essential for data interpretation and extracting meaningful information from EPR spectra.

 

Rotational selection rules in EPR

The most basic EPR spectroscopy selection rule is the spin selection rule. It states that for an electron jump to occur, the spin projection quantum number (m_s) must change by ±1. The m_s value describes the orientation of the electron spin for an external magnetic field. This shift can be caused by a spin flip (parallel to antiparallel or vice versa) or spin conservation (parallel to parallel or antiparallel to antiparallel).

 

Magnetic quantum number selection rules in EPR

The magnetic quantum number (m_l) selection rule is also important in EPR spectroscopy. It states that the change in m_l value due to transitions must be ±1. The m_l value is related to the component of angular momentum of the electron along the magnetic field axis. EPR leaps usually involve a change in the angular momentum of the electron orbitals, which results in a change in the m_l value.

 

Transition selection rules in EPR

Another important selection rule in EPR spectroscopy is the transition selection rule. It states that only allowed leaps will be observed in the EPR spectrum according to the spin and magnetic quantum number selection rules. No forbidden transitions that violate the selection rule will be detected. This rule facilitates the interpretation and assignment of spectral features.

 

Forbidden transitions in EPR

Although forbidden leaps strictly violate the selection rule, they sometimes occur with very low probability. Forbidden leaps are usually caused by weak interactions, such as spin-orbit coupling, which couples spin and orbital angular momentum. These leaps are usually observed as weaker spectral features compared to the allowed leaps.

 

Thus, selection rules play a key role in EPR spectroscopy, controlling the transitions between the energy levels of paramagnetic matter. Spin selection rules, magnetic quantum number selection rules, and lepton selection rules identify allowed and forbidden leaps that enable the interpretation and analysis of EPR spectra. Understanding these selection rules helps researchers extract valuable information about the electronic structure, spin dynamics, and magnetic properties of paramagnetic systems when using EPR spectroscopy.

CIQTEK EPR spectrometers are simple and easy to use, providing researchers with a user-friendly operating environment.

The g-value plays a crucial role in EPR (Electron Paramagnetic Resonance) spectroscopy in understanding the electronic structure and magnetic properties of paramagnetic substances. Today, we will talk about the key factor in EPR spectroscopy: the g-value (g-factor).

 

The g-value is a dimensionless quantity that represents a constant of proportionality between the magnetic field and the energy difference between the energy levels in the system. The g-value can be obtained by measuring the resonance frequency of a paramagnetic substance absorbing electromagnetic radiation in the presence of a magnetic field. It represents the extent to which the electron spin interacts with the external magnetic field. The g value is commonly used to determine important characteristics of paramagnetic substances, such as the number of unpaired electrons and their orbital angular momentum.

 

For a free electron, the g value is a constant of 2.0023, derived from fundamental physical properties. However, in more complex systems, such as transition metal complexes or organic radicals, the g value can deviate from this standard value. The deviation arises due to various factors, including spin-orbit coupling and hyperfine interactions with nearby nuclei. These interactions introduce additional energy levels and modify the electron's behavior in the magnetic field, leading to different g values.

 

By analyzing the g value in EPR spectroscopy, scientists can gain insights into the molecular structure and chemical environment of the paramagnetic species under investigation. A change in the g value can reveal the presence of different ligands or coordination environments around a metal ion, providing valuable information about the electronic configuration and coordination chemistry.

In addition, the g-value can be used to study the dynamics of a system. For example, it can provide information about the rate of electron transfer or spin relaxation processes, revealing the kinetics and mechanisms involved in chemical reactions or biological processes.

 

A common method of measuring the g-value is using EPR spectroscopy on a sample with a known g-value. This reference sample can be a compound with a well-characterized g-value or a spin probe, such as a stable organic radical. By comparing the position and shape of the resonance signals of the reference sample and the sample of interest, the g-value of the unknown species can be calculated.

 

Another approach involves calculating the g value from the Zeeman effect. The Zeeman effect describes the splitting of energy levels in a magnetic field. By measuring the magnetic field strength required to observe resonance at different frequencies, the g value can be derived using the equation g = hν/μBΔB, where h is Planck's constant, ν is the microwave frequency, μB is the Bohr magneton, and ΔB is the magnetic field difference between the resonance peaks.

 

In addition, the g value can be determined by analyzing the linewidth of the EPR signal. Since the g value depends on the orientation of the unpaired electrons in the magnetic field, any interaction or fluctuation in the environment will broaden the EPR signal. The g-value can be estimated by measuring the linewidth and analyzing its dependence on the magnetic field strength.

 

It is worth noting that the g value is not always a fixed constant. In some cases, it may vary due to factors such as electron-electron interactions or electrons leaving the domain. These variations can indicate the chemical or physical properties of the paramagnetic substance.

In summary, the g-value in EPR spectroscopy is an important parameter that helps characterize paramagnetic substances. By determining the g-value, researchers can gain valuable insights into the electronic structure and properties of paramagnetic compounds, contributing to understanding a wide range of scientific disciplines, including chemistry, physics, and biology.

 

Click here to read more application notes on EPR spectroscopy.

In today's world of rapidly advancing technology, scientific breakthroughs rely heavily on our ability to visualize and understand materials at the smallest scales. One such tool of considerable importance is the field emission scanning electron microscope (FE SEM), and the CIQTEK SEM5000 stands out for its superior imaging capabilities and versatility. In this blog post, we will delve into the fascinating world of the SEM5000, exploring its features, applications, and countless possibilities.

 

FE SEM5000 Introductions:

The SEM5000 is a cutting-edge field emission scanning electron microscope that allows scientists and researchers to observe specimens with unprecedented clarity and resolution. Its advanced electron optics and detector systems enable detailed imaging and analysis at nanometer scales, providing insights into the structure, morphology, and composition of diverse materials.

 

FE SEM5000 Key Features:

a. High-Resolution Imaging: The SEM5000 boasts superior resolution, capturing intricate details of specimens with exceptional clarity. Its electron optics system, combined with advanced detectors, ensures high spatial resolution even at low accelerating voltages.

b. Field Emission Electron Gun: The SEM5000 incorporates a field emission electron gun, producing a finely focused electron beam for precise imaging and analysis. This technology enables enhanced surface sensitivity and imaging capabilities compared to traditional thermionic sources.

c. Versatile Specimen Chamber: The SEM5000 features a flexible specimen chamber that allows for the observation of various sample types, including conductive and non-conductive materials, biological samples, and delicate structures. Its unique three-axis stage provides accurate positioning and imaging options from multiple perspectives.

d. Analytical Capabilities: The SEM5000 is equipped with energy-dispersive X-ray spectroscopy (EDS) capabilities, enabling elemental analysis and mapping of the sample's composition. This feature is particularly useful in materials science, geology, and forensics.

 

FE SEM5000 Applications:

a. Nanomaterials Research: The SEM5000 has proven invaluable in the study of nanomaterials, enabling detailed characterization of nanoparticles, nanotubes, and other nanostructures. Researchers can investigate their morphology, size distribution, and surface properties, paving the way for advancements in materials science and nanotechnology.

b. Life Sciences: In biological research, the SEM5000 provides high-resolution imaging of cell structures, organelles, and tissues, aiding in understanding cell morphology, disease mechanisms, and drug delivery systems.

c. Failure Analysis and Quality Control: Industries such as electronics, automotive, and manufacturing employ SEM5000 to examine material defects, and surface contaminants, and perform quality control checks, ensuring the reliability and safety of their products.

d. Geological and Forensic Sciences: The SEM5000's capability to analyze chemical composition and morphological features is crucial in geological sample analysis, mineral identification, and forensic investigations.

 

The CIQTEK SEM5000 Field Emission Scanning Electron Microscope has revolutionized the way we look at and study materials at the nanoscale, driving breakthroughs in a variety of scientific fields such as materials science, life sciences, biology, chemistry, industry, etc. CIQTEK, as a manufacturer and a global supplier of Scanning Electron Microscopes, delivers the SEM5000 with superb quality and the best price to customers all over the world.