Why Should You Evacuate Before Heating in a Vacuum Drying Oven？

1) Protect the Vacuum Pump：

If you heat the oven before evacuating, the heated air will be drawn out by the vacuum pump. This process transfers heat to the pump, potentially causing it to overheat. Overheating can reduce the efficiency of the vacuum pump and may even damage it.

2) Preventing Damage to the Vacuum Gauge:

If heating the oven first, heated air would directed toward the Vacuum Gauge and cause this instrument to overheat. If the temperature exceeds the gauge's operational limits, it may lead to inaccurate readings or permanent damage.

3)Avoiding Safety Hazards:

The tested material is placed in the vacuum chamber that can remove extracted gases from the material. If the tested material is heated first, the gas will expand when it encounters heat. Due to the excellent sealing of the vacuum chamber, the immense pressure generated by the expanding gas could cause the tempered glass of the observation window to shatter.

The correct procedure is to evacuate air first and then heat. If the vacuum level drops after reaching the desired temperature, you can briefly re-evacuate. This method helps extend the lifespan of the equipment.

Conclusion:

To ensure safety, maintain equipment efficiency, and prolong the lifespan of vacuum drying oven, always follow the correct procedure: evacuate air first, then heat. This simple step can prevent potential hazards and costly damages.

We have cooperated with the German company - Froilabo and brought in the dragon because it can control the temperature like the dragon in the fantasy story. Dragon, A high-precision temperature forcing system that can rapidly heat and cool samples to determine their durability and resistance against precise thermal environments.

In this blog discover what a temperature forcing system is, and how our Dragon can help you by providing precise thermal testing for a wide variety of applications.

Key points:

• A temperature forcing system is used to test a samples resilience and durability under different temperature conditions.
• Thermal testing is crucial to ensure products are safe to use and meet required safety standards and regulations.
• A temperature forcing system is suitable for a wide variety of applications, which includes heating electronic components, electronic characterization, and performing climatic simulations.
• Dragon is the perfect solution for all your thermal testing needs, and features high performance and accuracy at all steps of analysis.

What is a temperature forcing system?

A temperature forcing system is used to evaluate a samples performance under different temperature conditions. By subjecting samples to rapid temperature changes, you can test them for their resilience and durability.

These systems are crucial for several reasons:

• Improve safety: By subjecting devices to rapid temperature changes, you can ensure they meet your required safety standards and regulations.
• Efficient product development: By testing different components early in the design and development phase, you can identify any potential issues early and rectify it quickly.
• Assess reliability and performance: By testing your samples performance you can ensure your devices can withstand extreme temperatures.

How does a temperature forcing system work?

A temperature forcing system works by using a direct temperature-controlled stream of hot or cold air to provide a precise thermal environment for your samples. The Dragon provides a temperature range from -70oC to +250oC, to ensure sample function and viability at a wide range of temperatures.

Do I need a temperature forcing system?

Anyone who requires precise thermal testing would benefit from a temperature forcing system, and with Dragon it couldn’t be easier. All you have to do is create a method and Dragon does the rest.

In many industries, it’s essential to characterize and verify product performance when subjected to temperature variations. Dragon provides the perfect solution – our versatile and stable thermal unit is perfect for a wide range of applications.

Applications of the Dragon include:

• Heating electronic components
• Heating printed circuit boards
• Performing climatic simulations
• Electronic characterization
• Temperature cycling and targeted freezing applications

Discover the Dragon, the one stop solution for all your thermal testing needs:

• Excellent temperature stability: Delivering precision at every step of your testing, with a temperature range from -70oC to +250o
• Rapid temperature changes: Our Dragon effortlessly shifts from -55oC to +125oC in a matter of seconds (something even the mystical dragon can’t yet achieve)
• Digital connections: Connect your computer to your Dragon for simple method creation and run monitoring.
• Easy manoeuvring: It can still move with ease using the guide handle and 4 wheels to easily transport to your desired location.
• Adaptable to your needs: Our versatile product contains an adjustable airflow between 2.2 l/sec and 8.4 l/sec and three different working methods – manual, automatic and programmable.
• Compliance at every step: Dragon has been tested in accordance to and complies with the European norm in force: EN60068-3-11.

Learn more about the dragon by visiting our dedicated Dragon product page.

The Thermal Shock Test Chamber is a specialized experimental equipment used to test the performance of materials, electronic components, devices, and other products in extreme temperature conditions. It can simulate environmental changes from extreme cold to extreme heat, through rapid temperature transitions, observing and evaluating the stability and reliability of samples under such harsh conditions. This type of experiment is particularly in manufacturing industrial, electronic devices, and scientific research fields, as many products will facing drastic temperature changes in daily use.

It is extremely important to ensure the normal operation of electronic products in different environments during the designing and manufacturing, especially in the fields of aerospace, automotive electronics, communication equipment, etc. Products must be able to withstand various harsh weather and temperature changes. Through high and low temperature cyclic tests, engineers can reveal potential defects when using, also providing important references for subsequent product improvement and innovation.

        The Thermal Shock Test Chamber consists of two main parts: the environmental control system of  high and low temperatures. The temperature variation can generally be between -70 ℃ and 150 ℃ in the chamber, and the specific temperature range can be adjusted according to different needs. The experimental process will with multiple cycles, and each cycles contain rapid temperature changes that the sample to intense impacts between high and low temperatures. This type of testing can detect the physical properties of samples, including their tensile strength, elasticity, hardness, and even detect potential issues in thermal fatigue and material aging.

In addition, the design of this testing equipment is also very sophisticated, often equipped with advanced monitoring systems that can record temperature changes and sample reactions in  testing process, making the evaluation work more accurate and efficient. With the development of technology, the technology of Thermal Shock Test Chamber is also constantly updated, which not only improves the accuracy and speed of testing, but also enhances the safety and reliability of use.

In summary, Thermal Shock Test Chamber is an indispensable tool in modern material and product research. It provides us with an effective means to ensure that products can always maintain superior performance and stable quality in changing environments. It is an important link in promoting technological progress and industrial development. Through such experiments process, we can gain a deeper understanding of the characteristics and behavior of materials, thereby promoting the birth of safer and more reliable products.

Refrigeration System

The refrigeration system is one of the critical components of a comprehensive test chamber. Generally, refrigeration methods include mechanical refrigeration and auxiliary liquid nitrogen refrigeration. Mechanical refrigeration employs a vapor compression cycle, primarily consisting of a compressor, condenser, throttle mechanism, and evaporator. If the required low temperature reaches -55°C, single-stage refrigeration is insufficient. Therefore, Labcompanion's constant temperature and humidity chambers typically use a cascade refrigeration system. The refrigeration system is divided into two parts: the high-temperature section and the low-temperature section, each of which is a relatively independent refrigeration system. In the high-temperature section, the refrigerant evaporates and absorbs heat from the low-temperature section's refrigerant, causing it to vaporize. In the low-temperature section, the refrigerant evaporates and absorbs heat from the air inside the chamber to achieve cooling. The high-temperature and low-temperature sections are connected by an evaporative condenser, which serves as the condenser for the high-temperature section and the evaporator for the low-temperature section.

Heating System

The heating system of the test chamber is relatively simple compared to the refrigeration system. It mainly consists of high-power resistance wires. Due to the high heating rate required by the test chamber, the heating system is designed with significant power, and heaters are also installed on the chamber's base plate.

Control System

The control system is the core of the comprehensive test chamber, determining critical indicators such as heating rate and precision. Most modern test chambers use PID controllers, while a few employ a combination of PID and fuzzy control. Since the control system is primarily based on software, it generally operates without issues during use.

Humidity System

The humidity system is divided into two subsystems: humidification and dehumidification. Humidification is typically achieved through steam injection, where low-pressure steam is directly introduced into the test space. This method offers strong humidification capacity, rapid response, and precise control, especially during cooling processes where forced humidification is necessary.

Dehumidification can be achieved through two methods: mechanical refrigeration and desiccant dehumidification. Mechanical refrigeration dehumidification works by cooling the air below its dew point, causing excess moisture to condense and thus reducing humidity. Desiccant dehumidification involves pumping air out of the chamber, injecting dry air, and recycling the moist air through a desiccant for drying before reintroducing it into the chamber. Most comprehensive test chambers use the former method, while the latter is reserved for specialized applications requiring dew points below 0°C, albeit at a higher cost.

Sensors

Sensors primarily include temperature and humidity sensors. Platinum resistance thermometers and thermocouples are commonly used for temperature measurement. Humidity measurement methods include the dry-wet bulb thermometer and solid-state electronic sensors. Due to the lower accuracy of the dry-wet bulb method, solid-state sensors are increasingly replacing it in modern constant temperature and humidity chambers.

Air Circulation System

The air circulation system typically consists of a centrifugal fan and a motor that drives it. This system ensures the continuous circulation of air within the test chamber, maintaining uniform temperature and humidity distribution.

In modern agricultural production, harvesting and processing of grains are important links. In order to improve efficiency and quality, grain color sorter has become one of the indispensable equipment. As a well-known agricultural industrial machinery manufacturer, Mihoshi brand provides a series of efficient and intelligent grain color sorting machines for production and processing companies with its advanced technology and excellent quality. This article will introduce the characteristics and advantages of Mihoshi Valley's selection machine, helping readers choose the equipment that suits their needs.

Characteristics of Mihoshi Valley's Machine Selection

The Mihoshi grain sorting machine adopts advanced optical sensing technology and image processing algorithms, which can comprehensively and accurately sort grains. Its main features include:

Efficient and energy-saving: The Mihoshi Valley selection machine adopts an optimized operating system and an efficient exhaust system to reduce energy consumption and improve work efficiency.

Accurate sorting: The grain color sorter can accurately separate impurities, defective grains, and diseased grains based on their size, shape, color, and other characteristics, ensuring excellent grain quality.

Intelligent control: The grain color sorter is equipped with an advanced intelligent control system, which can adapt to different grain varieties and processing requirements through real-time monitoring and automatic adjustment, providing the best color sorting effect.

Enhanced durability: The Mihoshi Valley selection machine adopts high-quality materials and precise processing technology, with high durability and stability, and can operate stably for a long time.

Mihoshi Valley's advantages in searching and selecting machines

The advantages of choosing Mihoshi Valley for machine selection are as follows:

Reliable Quality: As a well-known brand in the agricultural machinery industry, Mihoshi has always focused on product quality and technological innovation. Choosing the Mihoshi Valley sorting machine allows you to use it with confidence and achieve excellent sorting results. Mihosh

Widely applicable: Mihoshi grain color sorter can be used for sorting various grains, including wheat, rice, corn, etc. It has a wide range of applications and can meet the needs of different crops.

User friendly: The Mihoshi grain color sorter has a simple and easy to understand operating interface and user-friendly design, making it easy for even users without professional knowledge to operate and improve work efficiency.

Customer Service: Mihoshi provides comprehensive pre-sales consultation and after-sales service, including equipment installation, maintenance, etc., to ensure that users receive timely support and assistance during the purchase and use process.

Mihoshi grain color sorter, with its advanced technology and excellent quality, has become an important tool for production and processing companies to improve production efficiency and ensure grain quality. When choosing a grain color sorter, you can consider the Mihoshi brand products produced by Meixing Intelligent Technology Company, and choose the appropriate model and configuration according to your own needs to improve the quality and efficiency of agricultural production.

Rice is one of the most important staple foods for people, and for most people, three meals a day revolve around rice. If the quality of rice is not up to standard, it will directly affect people's physical health, increase the demand for rice quality, and promote the continuous improvement of rice technology and equipment.

The rice entering the color sorter must not contain any crushed stones, metal materials, or other substances. This requires the installation of effective magnetic separators, high-efficiency vibrating screens, density grading stone removal machines, and other machines during the initial cleaning stage to remove as much residue as possible, reduce color particles and other components, relieve the pressure on the color sorter, fully utilize the initial cleaning function, and improve the working efficiency of the color sorter.

Rice enters the machine from the top hopper, and through the vibration of the vibrator device, the rice slides down the channel, accelerates its descent into the observation area of the sorting chamber, and passes between the sensor and the background plate. Under the action of the light source, the system generates output signals to drive the solenoid valve to blow out particles of different colors into the waste chamber of the receiving hopper according to the strength and color changes of the light, while the good rice continues to fall into the finished product chamber of the receiving hopper, thus achieving the purpose of selection. The beige color sorting machine can screen out rice grains with different colors, effectively improving rice quality, reducing rice loss, and lowering processing costs.

For consumers, only rice with good quality and no impurities can motivate them to purchase. Undoubtedly, rice production enterprises are facing challenges and need to 100% remove particles and impurities with different colors, such as coal slag, small glass, black rice grains, etc. The Meixing beige color sorter can fully meet these requirements.

Mooney Viscometer GT-KR03— Your Comprehensive Guide

In the world of rubber manufacturing, ensuring quality and consistency in raw and compounded rubber is critical. This is where the Mooney Viscometer GT-KR03 comes into play. A sophisticated yet essential instrument, the Mooney Viscometer is designed to measure the viscosity and scorch characteristics of rubber materials.

The Mooney Viscometer GT-KR03 is a state-of-the-art device used primarily in the rubber industry to determine the viscosity and scorch of both raw and compounded rubber. Viscosity, in this context, refers to the material’s resistance to flow under specific conditions, which plays a vital role in processing rubber. Scorch, on the other hand, indicates the tendency of rubber to undergo premature curing or crosslinking during manufacturing.

The Mooney Viscometer is a versatile tool that plays a crucial role across a range of industries. Its primary application lies in rubber manufacturing, but it also extends its benefits to a variety of other sectors:

1. Accurate and Precise Measurements

Why Luggage Durability Matters

• Suitcases: Both hard and soft-shell suitcases can benefit from vibration and impact testing, particularly around areas like the handles and zippers.
• Backpacks: The durability of straps, stitching, and overall construction can be assessed using the GT-LC02 Luggage Vibration Tester.
• Travel Bags: Large travel bags often face similar stresses, and testing with the GT-LC02 Luggage Vibration Tester helps ensure they maintain their structural integrity.
• Business Cases and Totes: The machine is also ideal for testing the sturdiness of bags designed for professional use, ensuring they can withstand the daily demands of business travelers.

Features of the GT-LC02 Suitcase Vibration Impact Tester

• Customized Test Settings: The GT-LC02 Suitcase Vibration Impact Tester features a user-friendly control panel with settings for starting, stopping, pausing, counting, and clearing. These functions help manufacturers manage and track the testing process accurately, ensuring consistent results.

• Automatic Shutdown: The machine stops automatically when the set number of cycles is reached or if the backpack strap is damaged during testing. This feature helps ensure that tests are not prolonged unnecessarily, saving time and effort while also providing a safety mechanism to avoid further damage to the test sample.

• Oscillating Impact Simulation: The GT-LC02 Suitcase Vibration Impact Tester replicates the impact forces that a bag might experience during travel. The machine’s cylinder mechanism drives electromagnets to create free impacts under the force of gravity. This results in an oscillating impact rate of 20±2 times per minute, a speed that is optimal for simulating the stresses experienced during travel and handling.

• Accurate and Repeatable Results: With the ability to cycle from 0 to 999,999 impacts, the GT-LC02 Luggage Vibration & Impact Tester Suitcase Vibration Impact Tester provides manufacturers with the flexibility to conduct thorough testing, ensuring that products can withstand prolonged exposure to stress.

Corrosion testing is a cornerstone of quality assurance in industries where materials face exposure to harsh environments, from automotive manufacturing to aerospace engineering. The GT-F50BA Salt Spray Chamber has emerged as a trusted tool for simulating corrosive conditions and evaluating material durability. Let’s break down its design, functionality, and operational advantages.

• Test Chamber: Set at 50°C (±1°C) to replicate a stable corrosive environment.
• Pressure Tank: Heated to 63°C (±1°C) to generate a uniform salt spray mist.