1. Glue leakage at the Hot melt gluing nozzle 

If glue leaks from the nozzle during glue spraying, the possible reasons are as follows:

a. The temperature of the glue gun is not enough. The temperature of the hot melt glue gun should be increased appropriately.

b. If the pressure or flow rate of the air jet is too small, glue will drip from the nozzle. Increase the pressure of the air blowing pipe appropriately.

c. If the air passage in the nozzle is blocked, remove the nozzle module and clean it.

2. If glue leaks from the nozzle when the machine is not spraying glue, the possible reasons are as follows:

a. The thimble does not completely close the glue channel, and it is necessary to increase the pressure on the air channel of the solenoid valve of the glue gun.

b. The ejector pin is damaged and needs to be replaced.

c. The ejector pin and the outlet of the glue channel do not cooperate well. Adjust the fine-tuning bolt on the ejector pin to press down on the ejector pin and then loosen the bolt. Manually operate the solenoid valve on the glue gun several times.

3. The small hole in the middle of the needle valve leaks glue.

a. The sealing ring underneath the needle valve needs to be replaced.

Generally, after half a year or a year of use, the glue pipeline of the PUR hot melt adhesive machine needs to be cleaned and maintained.

What are the advantages of regular maintenance?

It can increase the fluidity of glue and improve the glue effect.

1. Ensure the quality of PUR hot melt adhesive

Clean pipes can prevent PUR hot melt adhesive from remaining, solidifying or deteriorating in the pipes, ensuring that the PUR hot melt adhesive is fresh every time it is used. This is particularly important for application scenarios that require high-precision bonding to ensure the stability of product quality.

2. Improve production efficiency

Pipe cleaning can avoid production interruptions due to blockages and reduce downtime. The smooth glue feeding process can ensure the continuous operation of the production line and improve production efficiency.

3. Extend equipment life

Residue in pipes can cause corrosion or wear on the inner walls of pipes, and regular cleaning can reduce this damage. Well-maintained equipment generally has a longer service life, reducing equipment replacement costs.

4. Reduce failure rate and maintenance costs

Duct cleaning can reduce equipment downtime caused by blockages, leaks, and other failures. Reducing failure rates can reduce maintenance costs and improve equipment utilization.

5. Reduce security risks

Residue or blockage in pipes can cause equipment overheating, leakage, and other safety hazards. Through regular cleaning, these risks can be reduced and production safety ensured.

Die casting machine is used for pressure casting machine, including hot chamber and cold chamber two kinds. After are divided into straight and horizontal two types. Die casting machine under the action of pressure to the molten metal hydraulic injection mold cooling molding, after opening the mold can get solid metal castings, such as aluminum alloy, zinc alloy, lead alloy die casting.

The closing mechanism of hot chamber die casting machine is the same as that of cold chamber die casting machine, the difference lies in the different injection and pouring mechanism. The chamber of the hot chamber die casting machine is closely connected with the furnace as a whole, while the chamber of the cold chamber die casting machine is separated from the furnace.

Die casting machine peripheral automation equipment including: conveyor belt, safety fence, platform, pressure machine, mold temperature machine, marking machine, trimming machine, cooling device, quick change die device, exhaust filter dust removal device, auto extractor system, servo sprayer,servo ladle machine, quantitative thermal machine, melting and holding furnace, rely on the equipment to realize the automatic die casting production line.

Plastic Three Station Thermoforming Machine are commonly used in making plastic product such as Fastfood tray, Egg Tray, Cake Box, Fruit Container. It is suitable for PP,PS,PET,PLA and other thermoforming sheet.

 This Plastic Thermoforming Machine have function of Sheet Heating, Press and Vacuum Forming in thermforming mold to a specific shape, cutting to piece and then stacking plastic product.

Here's a detail process of a plastic thermoforming machine to produce plastic product:

1. Heating: The plastic sheet is sent into the heating oven of machine, and heated to a precise temperature. The heating process makes the plastic sheet to be easily formed shape in the thermoforming mold.
2. Forming: after the plastic thermoforming sheet is heated to the setting temperature, it will be sent to the forming mold. The machine uses vacuum, pressure, and servo plug to draw the heated plastic sheet over the mold, and then shape of the desired plastic product.
3. Cutting: when shaped plastic product come out from forming mold, it will be sent to cutting station of machine, where equiped with a custom-made cutting die, to cut the plastic product to the final shape, only leave serval point to connecting sheet and plastic product.
4. Stacking: in this station, it will use stacking mold to separate plastic product from thermoforming sheet, and automatically stacking plastic product one by one. It can save labour cost and a lot of time of manual stacking.

 We have 3 Model of Plastic Three Station Thermoforming Machine, all use servo motor system, if you are intesting, please visit our PRODUCT CATEGORIES, or contact with us.

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.

EPR (Electron Paramagnetic Resonance) Spectroscopy, also known as Electron Spin Resonance (ESR) Spectroscopy, is a technique used to study the electronic structure of paramagnetic species.

There are two main types of EPR spectroscopy: Continuous Wave (CW) EPR spectroscopy and Pulsed EPR spectroscopy.

Continuous wave (CW) EPR Spectroscopy:

In continuous wave EPR spectroscopy, a microwave source continuously emits microwave radiation at a fixed frequency into the sample.

A magnetic field is swept over a range of frequencies and the absorption of the microwave radiation by the sample is measured as a function of the magnetic field strength. This produces an EPR spectrum showing the jumps between energy levels of paramagnetic species.

CW EPR spectroscopy is commonly used to study relatively slow dynamic processes and to examine stable paramagnetic species.

Pulsed EPR Spectroscopy:

Pulsed EPR spectroscopy, also known as pulsed electron-electron double resonance (ELDOR) or electron-electron resonance, utilizes short pulses of electromagnetic radiation. This technique is used to study the dynamics of paramagnetic species and their interactions with their surroundings.

Pulsed EPR spectroscopy provides more detailed information and allows the measurement of relaxation times, distances, and other dynamic parameters. It involves applying microwave pulses, often combined with radio frequency (RF) pulses, to manipulate the electron spin state and measure the resulting signal.

Pulsed EPR techniques include Electron Spin Echo (ESE), Electron Nuclear Dual Resonance (ENDOR), Electron Spin Echo Envelope Modulation (ESEEM), and others.

Pulsed EPR spectroscopy is particularly well suited for the study of transient species, radical reactions, and spin-spin interactions in paramagnetic systems.

Both CW EPR and pulsed EPR spectroscopy have their advantages and applications, depending on the specific research objectives and the properties of the paramagnetic species under study.

CIQTEK offers X-Band Pulse EPR Spectroscopy | EPR100 and X-Band CW-EPR Spectroscopy | EPR200-Plus

Scanning Electron Microscopy (SEM) is based on the principle of using a focused beam of high-energy electrons to probe the surface of a sample and produce a high-resolution detailed image.

Electron Source: SEM works by using an electron source, typically a heated tungsten filament or a field emission gun, to produce a beam of electrons.

Electron Beam Generation: The electron source emits electrons, which are accelerated to high energies by an electric field. The electrons are focused into a narrow beam using electromagnetic lenses.

Sample Interaction: The primary electron beam is directed onto the sample's surface. When the beam interacts with the sample, several types of interactions occur, including scattering, absorption, and emission of secondary electrons.

Scattering: The primary electrons may undergo elastic or inelastic scattering while interacting with the atoms in the sample. Elastic scattering results in a change in direction of the electron beam, while inelastic scattering leads to energy loss due to interactions with the sample's atoms.

Secondary Electron Emission: Some of the primary electrons knock off secondary electrons from the surface of the sample through inelastic scattering. These secondary electrons carry information about the sample's topography and composition.

Signal Detection: The emitted secondary electrons, along with other signals such as backscattered electrons and characteristic X-ray emissions, are detected using various detectors. Some common detectors in SEM are the Everhart-Thornley detector for secondary electrons and detectors for backscattered electrons or X-rays generated by the sample.

Image Formation: The detected signals are then amplified and processed to form an image. The signal intensity is typically converted into a grayscale or false-color representation, allowing the visualization of surface features and details.

Scanning: To generate a complete image, the electron beam is systematically scanned across the surface of the sample in a raster pattern. The intensity of the detected signals at each point is recorded, allowing the construction of a high-resolution image.

Image Display and Analysis: The final reconstructed image is displayed on a monitor or recorded for further analysis. SEM images can be used to examine the microstructure, morphology, elemental composition, and surface characteristics of a wide range of materials.

In short, scanning electron microscopy utilizes the interaction of a focused, high-energy electron beam with a sample to generate detailed images. By analyzing the signals emitted by the sample, SEM provides valuable information about the surface topography, morphology, and composition of the sample at high resolution. It is widely used in a variety of scientific and industrial applications for research, quality control, and materials characterization.

CIQTEK offers various high-quality SEM equipment for researchers and industrial users.

There are many factors to consider when selecting an Electron Paramagnetic Resonance (EPR) spectroscopy for your research.

Some of the key points are listed below:

Frequency Range: Determine the frequency range needed for your study. EPR spectroscopy is available in different frequency ranges, such as X-band, Q-band, and W-band. The choice depends on the type of sample you are studying and the level of spectral resolution required.

Magnetic Field Strength: Consider the magnetic field strength required for your experiment. EPR spectroscopy operates at different magnetic field strengths, such as 0.35 T, 1.2 T, or higher. Higher field strengths provide better spectral resolution but may require specialized equipment and cost more.

Sample Size and Compatibility: Evaluate sample size and compatibility requirements. Some EPR spectroscopy is designed for small sample sizes, while others can accommodate larger samples or even solid-state systems. Make sure the spectroscopy you choose will meet your specific sample requirements.

Instrument Sensitivity and Signal-to-Noise Ratio: Evaluate the sensitivity and signal-to-noise ratio (SNR) of your EPR spectroscopy. Higher sensitivity and SNR will detect weaker signals and improve the overall quality of the measurement. Consider the application requirements and the sensitivity needed for the sample.

Modulation capability: Checks the modulation capability of the EPR spectroscopy. Modulation techniques such as continuous wave (CW), pulse, echo, or Fourier transform (FT) are critical in different experimental setups. Ensure that the spectroscopy supports the modulation techniques required for your study.

Additional features and accessories: Consider any additional features or accessories that may be required for the experimental setup. This may include a temperature control system, variable angle goniometer, cryostat, or specialized resonator. Evaluate whether the spectroscopy has the required flexibility and compatibility with these accessories.

Cost and Availability: Finally, consider the cost and availability of the EPR spectroscopy. The cost and availability of the various models offered by different manufacturers vary. Ensure that the EPR spectroscopy you choose fits your budget and that the manufacturer offers reliable support and service.

CIQTEK offers different specialized custom EPR spectroscopy solutions for different customer needs.

From benchtop EPR to floor-stand EPR spectroscopy, X-band to W-band EPR spectroscopy, pulsed and continuous wave EPR spectroscopy, at affordable prices and world-leading quality.

CIQTEK EPR spectroscopy should be the first choice for EPR users.

Electron Paramagnetic Resonance (EPR) spectrometers are widely used in research institutions, universities, and industrial laboratories in South Korea. Major brands of EPR spectrometers in Korea include Jeol, Bruker, Nicolet, and CIQTEK. Below are the features and prices of these EPR companies.

Jeol

Features: Jeol is a time-honored brand known for its high-quality and reliable instruments. On the downside, the cost is relatively high compared to other brands. In addition, depending on the specific model, their instruments may have limited flexibility regarding modular configuration and specialized accessories.

Bruker

Features: Bruker is a well-known EPR spectrometer company. Their spectrometers are known for their high sensitivity, advanced signal processing capabilities, and ruggedness. However, it is costly and the complexity of the instrument software may require a learning curve for new users.

CIQTEK

CIQTEK EPR spectrometers are technologically advanced with world-leading resolution and sensitivity. Also featuring a user-friendly software interface that is easy to use for beginners, CIQTEK's wide range of EPR spectrometers is equipped with a variety of specialized accessories and options for versatility in experimental setups. It is more affordable. Saves time and budget.

  https://www.ciqtekglobal.com

Nicolet (Thermo Fisher Scientific)

Features: Nicolet EPR spectrometers from Thermo Fisher Scientific are renowned for their accuracy, reliability, and ease of use, with excellent signal-to-noise ratios and sensitivity for a wide range of EPR applications. They have excellent signal-to-noise ratios and sensitivity for a wide range of EPR applications. One potential drawback of Nicolet EPR spectrometers compared to other brands is their limited availability of specialized accessories and options, which may limit certain experimental setups or specific research needs.

It's worth noting that the prices mentioned above are rough estimates and can vary depending on the specific configuration and region. Additionally, each brand may offer different models with varying specifications and price ranges.

Electron paramagnetic resonance (EPR), also known as electron spin resonance (ESR), is a technique used to study the magnetic properties of materials containing unpaired electrons.

Here is a brief explanation of how electron paramagnetic resonance works:

Unpaired electrons: Many materials, such as transition metal ions or organic radicals, possess unpaired electrons. These unpaired electrons have intrinsic magnetic properties.

External magnetic field: A strong, static magnetic field is applied to the sample being studied. This field aligns the magnetic moments of the unpaired electrons in the sample.

Resonance condition: A microwave source emits electromagnetic radiation with a specific frequency, typically in the microwave range. The frequency is adjusted until it matches the resonance condition, where the energy of the microwave radiation corresponds to the energy difference between electron spin states.

Absorption of energy: When the resonance condition is met, the unpaired electrons can absorb energy from the microwave radiation and transition from one spin state to another. This absorption of energy is detected as a decrease in the intensity of the microwave radiation passing through the sample.

EPR spectrum: By varying the magnetic field strength, the absorption of energy is recorded as a function of the magnetic field. The resulting EPR spectrum shows distinct absorption peaks or lines, providing information about the magnetic properties of the sample, such as the number of unpaired electrons, their spin orientation, and their interaction with the surrounding environment.

Overall, EPR measures the response of unpaired electrons to external static magnetic fields and microwave radiation, allowing scientists to study the electronic structure and magnetic properties of materials. Therefore, EPR technology has a prominent role in many fields such as chemistry, biology, medicine, food and beverage, etc. CIQTEK's self-developed EPR spectrometer supports researchers in many application areas. Click to view the EPR application notes.