What is Servo Controller in the Glass Tempering Furnace？

What is Servo Controller in the Glass Tempering Furnace？

Answer: Similar to the inverter, a Servo controller is a type of device used to control servo motor. Thanks to its extensive speed range, high precision positioning ability, quick response, high reliability, as well as strong ability in environment adaptiveness and anti-interference, it has been widely used in positioning devices that require high-speed and high-precision. At present, our company uses servo controllers primarily in applications such as transport positioning control and bending control devices.

In general, a servo drive controls servo motor through position, speed and torque to achieve high-precision positioning in a transmission system.

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Performance Requirements for Glass Tempering Furnace Corresponding to the Needs in Tempered Glass Curtain Wall Market

There are a large variety of capacities and configurations for glass tempering furnaces. You should choose the right glass tempering furnace based on your market positioning. For glasses used in curtain walls, the performance requirements of the glass tempering furnace may vary. Today, we will show you the different performance requirements of tempering furnaces for corresponding curtain walls on tempered glass market. These guidelines could be conducive to your next equipment acquisitions.

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What should we do if white haze occurs during glass temping process?

Longitudinal white haze occurring in the middle of the glass panels:     

 Reasons:  

1、The level of the equipment’s roller bed is poor.

2、Radial runout of the ceramic roller bed.

3、The heat balance is not enough.

4、Low temperature in the upper part of the convection furnace.

5、The speed of the glass oscillation inside the furnace is too fast.      

6、High temperature in the bottom part of the radiation furnace.               

7、Check whether the O-shape belt is slipping.               

8、Check whether the main shaft coupling keyway is damaged.                                                   

Measures: 

1、Check the equipment’s level.

2、Check for the radial runout of the ceramic roller bed. (the bearing seat is filled with high-temperature lithium 

lubricating grease) 

3、Appropriately switch on a higher heat balance pressure and operating time.

4.  Increase the speed of the convection blowers above the convection furnace.

5、Lower the speed of the glass oscillation inside the furnace.

6、Lower the temperature in the lower part of the radiation furnace.

7、Check whether the O-shape belt is loose or slipping away.

8、If there is any damage, initiate repair or replace with a new one.

 Transverse white haze occurring at both ends of the glass:

  Reasons: 

1、The temperature difference between the upper part and the lower part of the furnace is too large.               

2、(Radiation furnace) Excessively large heat balance pressure and operating time.                        

3、(JetConvection furnace) Excessively high rotating speed of the convection blowers in the upper part of the furnace.

4、The temperature in the bottom part is set too low.

Measures: 

1、Control the temperature difference between the upper and lower part of the furnace within 10℃.

2、(Radiation furnace) Appropriately reduce the heat balance pressure and operating time.

3、(JetConvection furnace) Appropriately lower the rotating speed of the convection blowers in the upper part of the 

furnace.

        4、Appropriately increase the temperature in the bottom part.

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How does a position limit switch work?

Also known as limit switch, it is a type of low current electric command device often used for position detection control. When a moving object comes into contact with an actuator, the device operates the contacts to make or break an electrical connection, causing the mechanical moving object to automatically stop, reverse, change speed or cycle in a certain direction or within a certain range.


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What is the seamless input/output processing control in the glass tempering furnaces?

It refers to the processing control over the heating chamber to allow input and output simultaneously. While the traditional process does not allow a new production cycle before vacating the heating chamber, this method offers much higher productivity; the shortfall of this approach is the lack of flexibility in settings as the input and output have to be synchronized.


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How does a proximity switch work?

A proximity switch is a type of position limit switch that operates without any direct physical contact with moving parts. When an approaching object being sensed within the detection range, the switch will be actuated without physical contact or pressure to emit control command to PLC. It is used for position limit, object counting, positioning control, and automatic protection in auto-control systems. 


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How do you clean up the ceramic rollers in the glass tempering furnace?

Use a vacuum cleaner to remove the surface powdery dust on the ceramic rollers in the glass tempering furnace. After that, soak a clean, hairless, soft, white cloth with the softening water and begin to wipe from the center on each side respectively to eradicate the dust. It is best to use distilled or pure water for the wiping process. Refrain from using alkaline cleaning agents or chemicals.





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How do you dismantle the ceramic rollers in the glass tempering furnace?

Only when the glass tempering furnace has been completely cooled before you can change the ceramic rollers in the tempering furnace. While changing the ceramic rollers, engage at least three people (each on one side and one to two person(s) in the center). During the dismantling process, remove the fixed screws on the bearings first. Engage in joint efforts to lift up the ceramic rollers on the glass tempering machine and place them on the conveyor rack. Thereafter, pull out the ceramic rollers. It should be noted that the action should be light and slow while pulling out the ceramic rollers in the glass tempering furnace. Do not knock against or scratch the roller at any time. 


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What defects usually occur during the early stage of glass heating in the glass tempering machine ? How should we resolve such issue?

Due to the contact between the glass and the rollers in the glass tempering furnace, the lower surface of the glass will expand faster than the upper surface. Therefore, the glass will bend upwards and only the middle section of the glass is in contact with the roller of the glass tempering furnace resulting in a faster rise in temperature of this section (the principle of thermal conduction). The sections hanging in the air will only be in contact with the rollers to continue absorbing heat after the glass plates completes the softening process. At this moment, the heat in the middle of the glass is much more than the upper surface of the glass. This has resulted in a severe deformation followed by optical distortion because of temperature differences. At this point, the speed of the convectional blowers in the upper section of the glass tempering machine should be properly increased or the upper and lower furnace temperature should be adjusted accordingly, allowing the glass to be rapidly flattened in the glass tempering furnace so that the issue can be rectified in a timely manner.


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What are the main structural components of LandGlass’ C-bent glass tempering furnace?

The C-bent section of LandGlass’ C-bent glass tempering furnace employs a fully integrated welding rack. The main components comprise of a cooling system, a drive system, a servo controlled bending system and an air control system. The cooling system is formed by an upper and lower chiller, air boxes and air pipes; the drive system is formed by a variable-frequency motor, decelerator and a roller bed that can execute lateral bending; the servo controlled bending system is primarily formed with an upper and lower chiller bending structure and arc-adjusting structure; the air control system is formed by the shutter, air release valve, air distribution boxes, etc.


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The composition of chillers in glass tempering furnace and how it works

The composition of chillers in the glass tempering furnace : the chillers are composed of several chiller assemblies, each consisting of a number of small air boxes and an air distribution box, connected to be an integrated device through the chiller frame. 

How the chiller in the glass tempering furnace works: The air distribution boxes are connected to the blowing system through canvas tubes. The cooling air will fill the air chambers of all small air box via the distribution box, flowing horizontally in these small air boxes and blowing out through the aluminum nozzles to quench the tempered glass.

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Common mechanical problems associated with the glass tempering furnace lifting gears and how to tackle them?

1. No response after pressing down the glass tempering furnace lifting button: 

Check whether the power supply is on and if the drive motor is damaged;

2. Abnormal noise during the glass tempering machine lifting: 

A. Lack of lubrication. Add grease or lubricating oil to gears, bearings and screws; 

B. Damaged bearings. Replace the bearings.

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What should you pay attention to when tempering screen printed glass?

To protect the screen printed surface, the screen printed surface should be placed facing up when you feed the screen printed glass into the glass tempering furnace;

Make sure the screen printed glass is dry before tempering;

The screen printed glass may bend, which can be solved by adjusting the air pressure; 

No S02 gas should be used during tempering. The glass tempering heating time is correlated with the color of the screen printed glass.

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What are the requirements when winding kevlar rope onto the glass tempering furnace?

What are the requirements when winding Kevlar rope onto the glass tempering furnace roller ?

Use 12mmX3.5mm Kevlar rope to wind glass tempering furnace rollers to make sure every two adjacent rollers are winded clockwise and counterclockwise respectively with 40mm screw pitch. The rotating direction of the last roller’s rope closed to the tempering furnace unloading table is set to be clockwise to unify the winding standard. 

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What is Semi-tempered Glass?

Semi-tempered glass, also known as heat strengthened glass, is a kind of glass between ordinary float glass and tempered glass. It has some advantages of tempered glass, having strength 2 times higher than regular float glass while avoiding the disadvantages of tempered glass, such as unsatisfactory flatness and easy to explode.

Semi-tempered glass is not considered as safety glass as it will result in larger fragments and cracks in radial pattern when it’s broken. Although most of fragment will be free of sharp edges, it could still cause injury. Therefore, semi-tempered glass is not suitable for sunroof or places with high possibility of being bumped into.

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The automatic identification settings of the control system in the glass tempering furnace

The control system of the glass tempering furnace can automatically set the heating temperature, convection intensity, and tempering air pressure as well as enabling effective heating areas according to the profile of the glass during heating process for a more accurate and energy efficient glass heating. Incorporated with prior processing experiences, it transforms the operating experiences into the production data to the maximum extent, retains such data for the automated analysis of the set parameters in the glass processing process, allocates the relevant data to achieve optimized combination, and monitors real-time data to make automatic adjustment for improved productivity.


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What is the structure and function of the tempering half-chiller valve on the flat glass tempering furnace?

The tempering half-chiller valve on the flat glass tempering furnace is a simplified butterfly valve composed of valve plate, rotary shaft, connecting rods, pin, cylinder, cylinder support frame, and other components.

Driven by the telescopic action of the cylinder, the valve plate of the tempering half-chiller valve on the flat glass tempering furnace completes the rotation to throttle down the round tube outlet of the air distribution box in order to regulate the size of the blowing area by the blowers, making it possible to process thinner glass with blowers of the same power.

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How to adjust the glass flatness using air valve in the air distribution box of glass tempering furnace?

When the air valve in the air distribution box is in the middle position, the corresponding pointer indicates zero. The indicator reading points to positive values when the air valve moves up and points to negative values when it moves down.

If the tempered glass bends upwards, it means that the wind pressure on the upper part of the chiller in the tempering section is low. At this point, adjust the air valve downward or to the direction of negative value. To the contrary, when it bends downwards, adjust the air valve and move it to the direction of positive value.

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How does the C+ ConeBend bending mechanism of LandGlass glass tempering furnace work?

Edge cracks usually appear on the single curvature bent glass processed in the traditional method. LandGlass C+ Conebend glass tempering furnace ,using special bending and quenching mechanism and driving system, can bend the glass once it comes out of the furnace and form the final shape longitudinally, successfully avoiding the edge cracks. For super-long bent glass, this technique can also effectively avoid the quality defects due to the temperature difference at two ends of the glass sheet because it is unnecessary to wait for the whole glass sheet coming out of the furnace.

Besides, LD-C+ Conebend glass tempering furnace has two independent transverse arch forming mechanisms, which can form arches with different radii at two ends and independently form the curve by its own settings. By this means, cone-shape glass can be produced successfully.

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What is the the single chiller conventional tempering of LandGlass’ C+ flexible bending tempering furnace?

Single chiller conventional tempering: By using special variable curvature mechanism and drive device to gradually change the shapes at two ends of the chiller, the glass can start bending as soon as it leaves the oven and forms desired curvature along the length of the glass. In addition to producing gradually bending tempered glass, it can avoid cracking that often occurs when producing single curvature bent tempered glass using traditional approach and meet users’ processing requirement for high-quality bent tempered glass. This method is suitable for processing curved tempered glass with a length less than or equal to 6 meters.


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0.1mm-Thin Flexible Glass For Folding Phones，Being Developed by Corning

Gorilla Glass-maker Corning is aiming to bring its expanse of knowledge to bear on the problem of foldable smartphone panels with a new type of flexible glass, according to a recent CNET report taking an inside look at the new material. Corning general manager John Bayne said that the challenge was creating a glass that’s thin enough to bend without sacrificing the resilience needed to protect a display.

Bayne notes that the company is targeting a “3- to 5-millimeter bend radii” for its 0.1mm thick glass, which could allow a foldable phone to be as thin as 6mm to 10mm with the folding screen wrapped around the outside.

”In a glass solution, you’re really challenging the laws of physics, in that to get a very tight bend radius you want to go thinner and thinner, but you also have to be able to survive a drop event and resist damage.” said Bayne. “The technical challenge is, can you keep those tight 3- to 5-millimeter bend radii and also increase the damage resistance of the glass. That’s the trajectory we’re on.”

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AGC Achieve 5G Communication Using Glass Antenna

Recently, AGC announced that they have achieved what is believed to be the world’s first 5G mobile telecommunications using an antenna embedded in synthetic fused silica glass to transmit and receive 28 GHz 5G radio signals for stable, high-speed mobile communication in buildings, vehicles and trains.

The antenna embedded in synthetic fused silica glass was used to verify 28 GHz 5G mobile communication with downlink speeds averaging 1.3 Gbps within a 100-meter range. The verification tests, which used a vehicle fitted with multiple antennas and traveling about 30 km/h, were conducted in the Sumida area of Tokyo.

5G radio signals in the 28 GHz band are seriously weakened when they pass through car windows to the interior. In addition, radio waves from urban 5G base stations reach the vehicle from various directions. The new AGC glass antennas were therefore used in multiple positions on the test vehicle including the windshield, side windows and rear window. The tests confirmed that these antennas switch seamlessly as the car moves, enabling 5G data to be transmitted and received in ideal directions with maximum signal strength and stability.

In addition, these 5G glass antennas are very small and transparent, allowing them to be fitted discreetly, without spoiling the vehicle’s appearance or the passengers’ line of vision.

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The Seventh Session of the Third CAIGA Council Meeting was Held in Wuhan

On July 4~5, the seventh session of the third CAIGA council meeting (expanded) & the industry economic operation workshop & the promotion and implementation of industrial standards was held in Wuhan. The meeting adopted the Proposal on reappointment of the president of CAIGA, the Proposal on the establishment of the CAIGA organizational restructuring and development committee, and the Proposal on acquisition of office space as registered premises of the association. 

The general assembly went through the procedures set forth in the articles of association and relevant provisions. After discussion and voting by the Council, Mr. Baiheng Zhang was unanimously elected to be the president of the China Architectural and Industrial Glass Association (CAIGA).  Mr. Zhang said that he would remain true to the original passion in the glass industry, keep mission of industrial advancement and development firmly in mind, adhere to the leadership of the Party, abide by the applicable laws, regulations, and the provisions of the association, follow the principle of “Leading, Coordinating and Serving”, fulfill his duties and responsibilities, earnestly implement the eight key tasks put forward by President Guoqing Chen in the Council’s work report, lead the association to forge ahead, continue the innovation, and work actively, give full play to the role as the bridge and tie between the government and enterprises, promote the industry restructuring, upgrading, and high-quality development, encourage the development of win-win relationship between the member enterprises and the association, and push forward the development of glass industry for achievements and to a new level. 

At the same time, the standing committee of the vacuum insulated glass professional committee and the standing committee of the machinery and equipment professional committee also attended the meetings. As one of the standing committee units of the vacuum insulated glass professional committee and a deputy director unit of the machinery and equipment professional committee, LandGlass participated in the meetings. 

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LandGlass is Named the ”Pilot Industry Enterprise for the Use of Intellectual Property

Recently, the Ministry of Industry and Information Technology announced the list of pilot industry enterprises for the use of intellectual property. LandGlass was successfully chosen and ranked high among the eighty-three pilot enterprises in Henan Province.  The selection is a high recognition to a company’s achievements in intellectual properties and a reaffirmation that the company has made new breakthroughs in the building of its capacity in the use of intellectual property rights. 

In order to further implement the national strategy in intellectual property and enhance the ability of industrial enterprises in intellectual property application, the Ministry of Industry and Information Technology organized the pilot programs for the use of intellectual properties in industrial enterprises according to the requirements stipulated in the “Intellectual Property Action Plan for the Manufacturing Industries (2018-2020)”. Before finalizing the list of pilot industry enterprises for the use of intellectual property, it has to go through the process of enterprise nomination, local authority and industry recommendation, review and final approval. The aim is to help enterprises to implement in depth the IP strategy and enhance the ability of industrial enterprises to use intellectual property rights. 

LandGlass has always attached great importance to the product and technology innovation as well as the protection to intellectual property. It has continuously invested in technological innovation, independent research and development of the flat and bent bi-directional convection technology, forced convection heating technology, and vortex heating technology for glass tempering furnace, led the industry technological advances as always, and won the national gold patent award twice. Through ten years of R&D efforts, LandVac made by LandGlass has become the world’s first commercialized tempered vacuum insulated glass. By adopting the unique low temperature, flexible and lead-free sealing technology, it offers outstanding performance in thermal insulation and noise isolation, and has taken the energy saving glass to a new level. 

The company has always considered intellectual property as a key link to build its core competitiveness to strengthen the overall capacities of creation, application, protection, and management of intellectual properties. It has taken the lead through the national intellectual property system certification and won the “Henan Province Intellectual Property Advantageous Enterprise”, “Henan Province Intellectual Property Demonstration Enterprise”, “National Intellectual Property Advantageous Enterprise”, and “National Intellectual Property Demonstration Enterprise” awards. In 2018, the company was named as one of the “China’s Top 1000 Innovative Enterprises”. 

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The First Piece of Aviation Windshield Glass Rolled off the Production Line in Changshu, China

The first piece of civil aviation aircraft windshield glass with independent intellectual property rights rolled off the production line in Changshu, dismantling the international monopoly in China. Recently, the aviation glass project of SYP Glass Group takes up operation in Changshu Economic and Technological Development Zone, filling the gap in domestic aviation glass production technology. After PPG of U.S. and Saint-Gobain of France, SYP Glass Group has become the world’s third supplier of aviation glass. 

Although aviation glass accounts for only a small proportion in the aircraft manufacturing industry, it is one of the key components of the airplane as it relates directly to the safety of the pilots and aircraft. According to the introduction, as a part of the aircraft structure, aviation glass must have sufficient strength to withstand the cabin pressure, aerodynamic loads, loads on airframes, etc. Due to the strict safety performance requirements of aviation glass, complex production process, and high degree of production difficulty, the market of the product has been completely in the control of few well-known foreign glass manufacturers. As Liu Mingqing, Vice President of SYP Glass Group Co., Ltd. and General Manager of Changshu SYP Special Glass Co., Ltd. said, the company had gone through more than 2 years of technical program exploration and R&D, spent 5 months to make targeted modifications on the production line for aviation glass project, and 1 month of commissioning. Changshu SYP Glass overcame all sorts of challenges, realized the localization of aviation glass in the shortest time with the fastest speed, and successfully produced the aviation glass that far exceeded customers’ quality requirements.

SYP Glass Group is going to be one of the major sheet glass suppliers for the windshield of Boeing, Airbus, Bombardier, Shanghai C919, and other passengeraircraft.

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3D printing method for transparent glass developed by MIT

The world of 3D-printing is expanding day-by-day.

Thanks to researchers from MIT, 3D-printing is taking a jump into the world of glass. Believe it or not, molten glass is the latest part of 3D-printing that MIT believes will change the world.

Researchers published their findings in the 3D Printing and Additive Manufacturing journal. Not only does the system they created offer control over the hot glass material, but it creates a state-of-the-art final product.

The combination of additive manufacturing with molten glass "presents a potential path toward production of highly complex geometry and custom-designed objects while retaining the optical transparency and chemical stability available through traditional manufacturing processes," the research states.The MIT researchers call the new printer G3DP2.

The G3DP2 platform, has been used to turn molten glass into 3-meter tall columns exhibited in Milan.

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Stand at the Academic Forefront and Lead the Industrial Development LandGlass Attended GPD

Recently, LandGlass participated in Glass Performance Days (GPD) hosted in Finland and made a presentation at the seminar on the theme of“The application and development trend of Vacuum Insulated Glass”to discuss in depth with industry peers on the future development of vacuum insulated glass.

GPD is an independent forum dedicated to the development of global glass industry. The conferences were initially organized in Finland. It has now become a platform for the world’s experts, scholars and manufacturing enterprises in glass industry to discuss technologies, demonstrate R&D results, and keep up with the latest technology trends. The event receives great attention in the industry and is well praised by the professionals. More than one thousand industrial experts participated in this conference. As one of the world’s leading enterprises in fields of R&D, production and manufacturing of high-performance new energy efficient materials and high-end intelligent machinery, LandGlass was invited to attend the event. 

LandGlass has been working on the high-performance energy efficient new vacuum insulated glass materials for over ten years. With a professional vacuum insulated glass R&D team staffed by more than 100 multidisciplinary PhDs and masters, and over 700 global patents, the company has established a world-class vacuum glass laboratory -- “LandVac Laboratory”.  Its R&D and manufacturing capacity in tempered vacuum insulated glass is in the world’s leading position.

Since the official launch in 2016, LandVac has passed the SGCC safety test, lead-free test, certification of recommended products for passive houses, energy-saving product certification, green product certification, and other authoritative approval. It has received enthusiastic market response with a large number of purchase orders pouring in from SCHOTT of Europe, Velux, Phononics of the United States, Country Garden, Beijing Academy of Building Research and many other domestic and international customers. At this event, taking “The application and development trend of Vacuum Insulated Glass” as the theme, LandGlass communicated with the participating experts and scholars its achievements in R&D and patents, bringing the leading information and development trend in the vacuum insulated glass industry to the professionals in presence. By vigorously promoting the applications of energy efficient materials for green buildings, it is hoped to further push forward the transformation of glass industry from traditional applications to the fields of energy saving and environmental protection, thus promoting the progress and development of the entire glass industry.

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The First Piece of Aviation Windshield Glass Rolled off the Production Line in Changshu, China

The first piece of civil aviation aircraft windshield glass with independent intellectual property rights rolled off the production line in Changshu, dismantling the international monopoly in China. Recently, the aviation glass project of SYP Glass Group takes up operation in Changshu Economic and Technological Development Zone, filling the gap in domestic aviation glass production technology. After PPG of U.S. and Saint-Gobain of France, SYP Glass Group has become the world’s third supplier of aviation glass. 

Although aviation glass accounts for only a small proportion in the aircraft manufacturing industry, it is one of the key components of the airplane as it relates directly to the safety of the pilots and aircraft. According to the introduction, as a part of the aircraft structure, aviation glass must have sufficient strength to withstand the cabin pressure, aerodynamic loads, loads on airframes, etc. Due to the strict safety performance requirements of aviation glass, complex production process, and high degree of production difficulty, the market of the product has been completely in the control of few well-known foreign glass manufacturers. As Liu Mingqing, Vice President of SYP Glass Group Co., Ltd. and General Manager of Changshu SYP Special Glass Co., Ltd. said, the company had gone through more than 2 years of technical program exploration and R&D, spent 5 months to make targeted modifications on the production line for aviation glass project, and 1 month of commissioning. Changshu SYP Glass overcame all sorts of challenges, realized the localization of aviation glass in the shortest time with the fastest speed, and successfully produced the aviation glass that far exceeded customers’ quality requirements.

SYP Glass Group is going to be one of the major sheet glass suppliers for the windshield of Boeing, Airbus, Bombardier, Shanghai C919, and other passengeraircraft.

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Global Vacuum Insulated Glass Market to Reach Around US $7 Billion by 2026

The global vacuum-insulated glass market for building and construction was valued at more than US $4.5 billion in 2017 and is anticipated to expand at a CAGR of more than 4 percent from 2018 to 2026, according to a new report published by Transparency Market Research, “Vacuum Insulated Glass for Building & Construction - Global Industry Analysis, Size, Share, Growth, Trends, and Forecast, 2018-2026.”

Expansion in the global vacuum-insulated glass market for building and construction is driven by the rise in demand for energy-efficient buildings, popularly known as green buildings. In terms of volume, the vacuum-insulated glass market for building and construction in Asia Pacific is expected to expand at a CAGR of more than 5 percent during the forecast period. Implementation of strict government regulations on carbon emissions is likely to propel the vacuum-insulated glass market for building and construction. Heating and cooling of buildings requires large amount of energy. The usage of insulated glass units is expected to significantly reduce the heating and cooling consumption and thereby lower CO2 emissions associated with it.

LandVac Fully Tempered Vacuum Insulated Glass excels in thermal insulation, with a U-value as low as 0.4 W/(m2•K), certified by the international  authoritative testing organization Ift. Since LandVac’vacuum chamber eliminates any gas heat transfer, the thermal insulation performance of LandVac is 2 to 4 times better than insulated glass and 6 to 10 times than single pane glass.

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Application of Vacuum Insulated Glass in Military Field

With the reinforcement of energy conservation and emission reduction around the world, as well as the growing demand of people for quality of life, the vacuum insulated glass has found a wide range of applications in architecture, home appliance, transportation, and other civil fields. Meanwhile, the outstanding performance of vacuum insulated glass in thermal insulation, noise reduction, condensation resistance, and wind resistance make it a perfect fit for many military applications such as border posts, barracks, and a great number of military equipment including military vehicles, naval ships, aircraft, battle tanks, and submarines to improve soldiers’ working, combat, and living environment, enhance the protection of military equipment, and fighting force. It has great development advantage and potentials in the military field.

As the leader in the vacuum insulated glass industry, LandVac has been successfully used in various military projects, making its contributions to the national security with its excellent properties. In a national defense research project conducted by the National University of Defense Technology, LandVac helped to prevent the occurrence of condensation under the special condition with 70℃ of indoor and outdoor temperature difference. By allowing observing the data clearly under such condition, it guaranteed the smooth operation of the experiment. The winter temperature for a border post in Hunchun, Jilin can be as low as 30-40 degrees below zero. The extended service life and high wind resistance properties of LandVac effectively helps to prevent heat loss and window condensation. It brings the indoor temperature up by more than 10℃, greatly improves the combat and living environment as the force multiplier.

Thermal insulation, noise reduction, condensation resistance, tempered safety, light weight structure, good for various environment, and ultra-long service life, all these properties of LandVac have ensured a great performance of it in barrack construction, military vehicles, and R&D for national security purpose. The winning of the silver metal at “The Third China Dual-use Technological Innovation Application Competition” indicates that LandVac products have been recognized by the Chinese military and will step into the national defense application area to make its contribution to the national security! In the future, we will continue our endeavor for the rise of China and do our best to strengthen the national defense and security!

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Application of Vacuum Insulated Glass in Home Appliances

The transparency and appearance of glass make it a perfect fit for a wide range of home appliance applications such as high-end freezer, refrigerator, wine cabinet, and display cabinet. However, ordinary glass material has its disadvantages that cannot be overlooked: on the one hand, because of its high thermal transmittance coefficient, the thermal insulation effect is poor. It has always been the weak link for reducing energy loss and consumption; on the other hand, to prevent condensation on the door, the use of electroplating film increases the energy consumption to a certain degree. In the context that emission reduction and environment protection have become the general trend, the vacuum insulated glass with thermal insulation, energy saving, and condensation free properties provides the ideal solution to this problem.

By the definition of thermal transmittance coefficient, the ambient temperature difference between the two sides of the glass will cause the heat being transferred from the side of higher temperature to the side of lower temperature. The bigger the temperature differences between the two sides, the larger the loss of energy. As to the energy efficiency of glass, the lower the thermal transmittance coefficient, the less the loss of heat, and vice versa. Vacuum insulated glass, especially the tempered vacuum insulated glass LandVac® made by LandGlass has a very low U-value. While the heat transfer is effectively blocked by the high level vacuum chamber, its U-value can be as low as 0.4W/(㎡·K). The thermal insulation effect of an 8.3 mm thick LandVac is better than that of a 1.5m thick brick wall. It effectively keeps the heat outside the cabinet from getting in, resulting in a great “coldness maintaining” effect with tremendous energy saving. In addition, the “coldness maintaining” effect can reduce the start-up time for the home appliance compressor and its working coefficient, significantly extending the service life of the appliance.

At present, a large number of glass doors used on freezers are dual-pane or triple-pane insulated glass. In order to prevent condensation, they generally place a layer of electroplating film on the glass surface which in turn increases the energy consumption. While the high vacuum chamber of LandVac vacuum glass effectively eliminates the dew condensation, the high thermal resistance property of LandVac vacuum insulated glass significantly lowers the surface dew point. It can maintain condensation free under the temperature of 50 below zero. The ultra-low dew point gives the freezer and household appliances a transparent visual effect. In addition, the 8.3mm thick LandVac weighs only 20kg/㎡. The lightweight structure reduces not only the overall weight of the freezer but also the material for the door frame, therefore, the total cost.

As one of the new generation energy saving materials heavily promoted by the State, LandVac vacuum glass offers apparent advantages such as low thermal transmittance coefficient, condensation free, light weight and thin structure that have great significance and potential to the development of energy efficient home appliances. Successfully commercialized LandVac is being known by more and more renowned domestic and international enterprises. Besides the home appliances field, it has demonstrated outstanding performance in military, construction, agriculture, and many other fields. In the future, it surely will make even greater contribution to energy conservation, green and environmental protection worldwide.

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