During the entire solventless composite process, tension control is important, and the precise tension control of solventless laminator is the premise of ensuring the quality of the composite film.

Tension Control Methods Of Solventless Lamination Machine

The solventless lamination machine mainly has two tension control modes, one mode is a “floating roller” and the other mode is a “micro shift”.

The “floating roller” tension control has the advantages of large range control, adapting to the wide substrates, but the structure is more complicated.

The “micro displacement” type tension control has the advantages of high precision, high sensitivity, but since the detection range is small, the absorbance of the material roll fluctuation is small, so this method is generally only suitable for relatively thick or non-molar material.

In actual solventless composite production, a solventless laminating machine may adopt different tension control methods in different sections.

Instruction For Tension Control Of Solventless Lamination Machine

1. During the solvent-free composite, the requirements for tension control are higher than that of ordinary compounds. The main reason is that there is no solvent composite initial adhesion, and the operational control is difficult, which may lead the quality problems. In addition, the solvent-free composite speed is much higher than the dry lamination machine.

During the solvent-free composite, the tension after the thin film is slightly greater than the main arrangement, and the winding tension is greater than the rewinding tension. The winding taper is controlled within 20%. For different materials, each part of the tension control is different, and even the film of the same material produced by different manufacturers, its tension has to be slightly adjusted.

2. In the solventless composite, not only the accuracy of the tension control system, the matching of the tension between the two composite rolls is emphasized. Under the current technical conditions, many tension control systems have very high accuracy performance, which can meet the needs of solventless composite production. However, in the process of solventless composite operation, this is often encountered, which the matching of the two-layer materials is more difficult, which not only requires a good tension control system but also carefully understand the material features. More accurately, the tension of solvent-free composite requires that the elongation of the two-layer rolls is consistent by controlling the tension to ensure that the two-layer material does not occur the relative slip during the solventless composite.

3.The rewinding tension and pressure are the key to solventless composite tension control. Since the combination of the composite film and the overall condition of the material roll, are determined by the rewinding tension and pressure, adopting the segmentation independent tension and segment tension taper are the most ideal control mode.

It should be noted that the segment tension taper is mainly to compensate for the need for linear tension to the requirements of different material winding tension. Different tension tips can be effectively guaranteed to ensure the neatness of the winding while reducing the generation of core wrinkles.

Unwinding Device And Loading Pattern Of Solventless Lamination Machine

Unwinding device
The solventless laminator is mounted with an aluminum foil unwinding frame and an ordinary unwinding frame. In general, the path of the aluminum foil unwinding frame is shorter with a smooth guide roller, often adopting “micro displacement” tension control. The ordinary unwinding frame is long, often adopting the “floating roller” tension control.

When using an aluminum foil unwinding frame, only one frame is in a working condition during the composite process, that is, the ordinary unwinding frame is in a non-working state. Due to the simultaneous compounds of the two films, two unwinding frames are required to work at the same time.

Accordingly, there must be two tension control systems in the working condition.

Loading Pattern

There are two main methods of the solventless laminating machine and the reliability of the air shaft and shaftless pneumatic shaft are high.

The shaftless cone top type of loading pattern has the advantages of simple, fast, high efficiency, low operation intensity, but it has high requirements for the core tube and in order to ensure safety, this loading pattern has a higher requirement for equipment parts Also the manufacturing cost is relatively high.

In the current market, medium and high-speed solvent-free lamination machines with speed at 400 to 600 m / min, basically adopt air shaft loading patterns.

Tension control plays an important role for the whole solventless composite process and learning the tension control well can do a great favor for the work efficiency of solventless laminating machine.

Sinstar Packaging Machinery Co., Ltd is founded in 2005, is a professional solventless laminating machine manufacturer with advanced systems, such as “Coating Clearance Memory System”, “Foolproof Glue Preparation System”, “Accurate Coating Weight Detecting System”, “Zero Error Tension Stabilizing System”, types including WRJi9 series, S1L90 series, and WRJFi9 series solventless laminator. Sinstar has professional and unique invention patents, appearance patents and utility model patents.

Why should choose Sinstar solventless lamination machine

1. Adopts advanced green and eco-friendly packing technology

2. No wrinkle when 0.06 mm thickness aluminum foil goes through the running roller.

3. Process parameters online printing out.

4. High viscosity glue feeding and coating applicable.

5. Active unwinding for aluminum foil through motor control.

6. Simple operation.

7. More capable, more refined, with a five roller coating system.

8. Width setting for digital glue spray.

9. Digital tension system

10. Intelligent dynamic analyzing system

The solventless lamination machine is equipment which is applied to solvent-free adhesive composite. There’re two types including single station solventless lamination machine and double station type. Sinstar solventless laminating machine will be one of the best choices for advanced flexible packaging machinery.

Solventless lamination is a method of compositing two or more substrates by using a solvent-free adhesive. The solventless lamination machine is mainly composed of two major parts including the solventless laminator and adhesive mixer. It mainly completes the operation of the unwinding, tension control, glue, composite and rewind. The adhesive mixer is a special device for quantifying the adhesive to the host. Here, we mainly introduce the types of solventless laminating machines.

Single Station Solventless Lamination Machine

Today, the single station solventless machine is widely used, which is determined by a variety of factors.

1. Due to the low initial adhesion of the solvent, the tension control requirements of the substrate are high. Therefore, during the solvent-free composite, the single-station solventless lamination machine has the advantages of shorter material feeding, high accuracy tension control and low waste rate.

2. Since the solvent-free adhesive has a certain opening time, it does not require a dry composite high-temperature drying system, using a single station solventless laminating machine, can realize the operation of the roll change during the downtime.

3. the manufacturing of the single station solventless laminator is relatively simple, and the cost is low. Moreover, the single station solvent-free lamination machine is compact, covering a small area, and one person can operate in general.

Overall, most of the solventless lamination machines, are the single station model, accounting for more than 70%.

Double Station Solventless Lamination Machine

The double-station solvent-free lamination machine is installed on an unwinding rack with two material rolls and can realize the reel alternation without downtime.

Advantages And Disadvantages Of Double Station Solventless Lamination Machine
Advantages

Compared with the single station solventless laminating machine, the double station type mainly has the following advantages.

1. High efficiency. Normally, the stable working speed of the solventless laminating machine is 300 ~ 600 m / min, which is about 2 to 3 times higher than the dry laminating machine. The double-station solventless laminator can greatly reduce the time of roll changing and downtime, improving production efficiency, with generally 70% higher yield.

2. Significantly reducing operational difficulties. Single station solventless laminating machine requires frequent replacement rolls, one unwinding or rewinding unit is replaced once every 15 to 30 minutes, which greatly consumes the operator’s physical strength. The physical strength of the personnel will be accompanied by a certain degree of tension, which will inevitably affect the progress and product quality. The roll changing without the downtime of a double station solventless lamination machine can avoid this.

3. Improve production stability. The double-station solventless lamination machine greatly reduces downtime, improving tension control and adhesive viscosity consistency, which will improve production stability.

Disadvantages

However, there are some potential disadvantages for double station solventless lamination machine, because the material feeding is long with higher tension control requirements and the waste rate will also increase accordingly, and there may be unfavorable effect for solventless composite products with lower initial adhesion. In addition, the cost of a double-station solventless lamination machine is also significantly higher than the single station type.

For more information, please visit the article page of useful knowledge of solventless lamination machine.

Additive manufacturing changes not only how products find their way to the consumer but also the form and function of those products. With additive manufacturing, you’re no longer bound by traditional manufacturing techniques. JTR Machine’s 3D printing service is revolutionizing the way we create products, not simply with developments in technologies and materials properties but particularly with the design. The role of design in the optimization of the supply chain and business strategy is something that should not be overlooked. 

As you may know, to create 3D printed parts, you need to get a design. Designing for additive manufacturing requires skills and knowledge to take full advantage of additive manufacturing. What is design for additive manufacturing and what are the benefits for your parts ? From complex geometries to mass customization, this technique will provide many advantages for your manufacturing process. 

What is Design for Additive Manufacturing (DfAM)?

Design for Additive Manufacturing is the ability to produce designs specifically for 3D printing. Indeed, designs produced for 3D printing are quite different from traditional designs, developed for other manufacturing techniques. Creating a design for additive manufacturing, a technique consisting into building parts layers by layers, is really different from subtractive manufacturing methods or injection molding. Design for additive manufacturing enables a new way of thinking but you also have to keep in mind that 3D modeling and design for additive manufacturing are two different things. While designing for 3D printing, you create a file that has to be understood by a 3D printer.  Moreover, 3D printing technologies all have their specificities, from FDM to Selective Laser Sintering or Selective Laser Melting technologies, which have to be taken into consideration during the designing process. 

Design engineering allows going even further, using advanced software to get incredibly optimized parts. 3D printing and design are changing the way companies are thinking and operating!

When the inflatable life raft is used, the raft and the storage cartridge can be thrown directly into the water. The life raft can be automatically inflated. When the ship sank too fast under the water, it is too late to throw it into the water surface. The hydrostatic pressure release on the raft will automatically remove and the emergency inflatable life raft will be released, floated automatically.

The detailed steps as follows

1.Take the hook opening on the hydrostatic pressure release and launch the small ring, making the chain hook fall, or rotating the manual release device, and the raft will slide to the sea.

2.When the height is less than 11m from the water surface, or when the raft is thrown into the water, it is necessary to continue to pull out the first cable and open the valve of the inflatable cylinder, so that the raft is floated above the seawater.

3.If there is an overturned state, it should be centered. The person should wear a life jacket, and climb the bottom of the raft. When standing in the steel bottle, the hands pull the bottom, squatting and hypokinesis.

The Installation Of Inflatable Life Raft

When the inflatable life raft is folded, it is stored in the glass steel storage cartridge. Generally, it is generally arranged on the two-port boards. When installing, the raft is welded to the ship deck, ensuring that the storage cartridge is in the hierarchical position, and the fix is with the kundy which is connected to the raft and the manual detachment assembly. The assembly components are connected to the hydrostatic pressure release.

1. The bowline that is taken from the life-saving raft cylinder, is firmly connected to the hydrostatic pressure release ring, and there is an easy-to-break rope on the connecting ring, and the other end of the easy-to-break rope should be connected in the hydrostatic pressure release.

2. It is not allowed to pull the bowline from the storage cartridge.

What Should Be Paid Attention To The Use Of Inflatable Life Raft

1. When the life raft is drifting too urgently, the sea anchor can be put into water and reduce the rafting speed.

2. in order to avoid the wind and waves, the enter-exit door should be put down, and the duty for looking out will be strengthened through the hoping window on the raft hanger.

3. If there is water in the raft, take out the water scoop from the repair bag and drain it with the absorbent sponge.

4.In the night, using the flashlight to emit a Mousta signal, during the day, the mirror is transmitted by the sunlight.

5. When it is raining, utilize the drinking water bottle and the water pipe and deposit the rainwater to prepare for drinking.

Every month, we’re putting together a Technology Showcase, highlighting some of the print and digital-only product information that Production Machining received from supplier companies. For March, we’re focusing on turning machines, including a chucker-convertible Swiss-type lathe, an 8-axis Swiss-type turning center that features a subspindle, a 20-mm machine with a rotary synchronous guide bushing and more.

For the latest new products across the broad spectrum of precision machining, check out Jtr Machine’s machining service online.

Sinstar, the full name is Sinstar Packaging Machinery Co., Ltd, which is founded in 2005 with location at high-tech industry zone of Rongchang District Chongqing City and is a professional supplier which is engaged in the research, development, production, sales and service of solventless laminating machine with annual production capacity of 200 sets.

Since the very beginning, Sinstar has been adhering to the design concept of “Innovation Changes The World, Innovation Masters The Future”, insisting on continuous technological innovation. We develop many unique technologies such as “Coating Clearance Memory System”, “Foolproof Glue Preparation System”, “Aimed Coating Weight Direct Input System”, “Accurate Coating Weight Detecting System”, “Multiple Mixing Ratio Protection System”, “Zero Error Tension Stablilizing System”, “Fast Cleaning System”. Now we have several series of solventless laminators including WRJi9 series, WRJFi9 series, S1L90 series, WRJSLi5 series and in China market so far we have more than 1000 customers because of the excellent characters of our machines: simple operation, safety, durability and perfect service.

Sinstar has a strong team of research and development, 30% of the company’s total staff are engineering and technical personnel who have been engaged in flexible packaging machinery industry for more than 20 years. Some of them are packaging industry engineers or doctoral talents and have ever participated in the formulation of the national standard GB/T 34150-2017 for non solvent laminating machine. In 2015, the design of Sinstar solvent free laminating machine won the second prize (Innovation category) of the second Cross-strait (Zhangzhou) Industrial Design Innovation Competition.

Sinstar has 220 authorized patents, including 8 for invention, 204 for utility model and 8 for appearance design. It has 10 trademarks and 2 software copyrights. The company has been awarded as “National High-Tech Enterprise”, “National Intellectual Property Advantage Enterprise”, “Chongqing Gazelle Enterprise”. In the 2019 Boao Forum for Chinese Entrepreneurs, Sinstar was selected as one of the brands symbolizing China’s economic resilience.

Determined to provide green and environment friendly flexible packaging machinery for the world, Chongqing Sinstar Packaging Machinery Co., Ltd helps to set up the first line of defense for food and drug.

An automatic tension controller is a high-precision, fully digital, intelligent tension controller, with more advantages and practicality in application and function. It is anti-interference, much more convenient, and stable. It has extremely high tension control accuracy, which is suitable for use in occasions that have high requirements for the accuracy of tension control.

Characteristics of automatic tension controller

1. High accuracy

The signal can be transmitted via the tension sensor, and then the output signal is processed by the intelligent PID. The actuator can be adjusted to control the changes in the diameter of the tensile scale and the appropriate coil. The output accuracy is as high as 0.1% so that the tension control is more accurate and stable.

2.Single/dual input

Receiving single or dual sensor inputting signal with automatic zeroing and calibration.

3.User-friendly interface

Adopts a full touch screen with simple operation and manual and automatic switching.

4.Strong anti-interference

Metal shell with strong anti-interference capacity without sparks.

5.Parameter password protection

Secret code setting will avoid that errors change the setting parameters.

6.Wide applications

Widely used in many industries such as paper-making, printing, packaging, textile, non-woven fabric, etc. The precision of tension control directly affects the processing quality of the product.

Automatic tension controller manufacturer – Arise

Arise, which is a leading web guide manufacturer, the products including web guiding system, web guide controller, web guide senor and more other products of web guiding & tension control, in China, with more than 10 years of experience, can provide full automatic tension controller with 32-bit or 16-bit high-precise AD sampling – T500/T1000.

The tungsten carbide has high hardness, high strength, good heat resistance, wear resistance, etc. Typically, the nozzle also often uses the tungsten carbide as the raw material. The carbide nozzle is made by the method of cold pressing combined with vacuum sintering, which causes many problems.

The problems existed in the production process

1. It has a high cost of steel molds and the heat treatment is more difficult.

2. The suppressed equipment needs large tonnage with complex mold.

3. High-temperature sintering deformation, which is not easy to control shrinkage and deformation.

4. It is difficult to follow-up mechanical processing, consuming much work time.

5. The waste rate of the sintering in the production process is high

How to improve the performance

Since the coal chemical slurry has ingredients with strong abrasion and high corrosive, To ensure the slurry output with a certain output pressure and long service life, so require carbide nozzle has excellent characteristics such as wear resistance, high preservative, high strength, high hardness.

By using a high-pure graphite mold, a nickel-plated short branch carbon fiber is added, adopting a vacuum hot pressing process, which will greatly improve the comprehensive performance of the wear resistance and anti-corrosion resistance of the carbide nozzle, as well as longer service life.

Professional Tungsten Carbide Nozzle Manufacturer – XYMJ

XYMJ is a professional carbide manufacturer with more than 20 years of experience in researching and manufacturing tungsten carbide products such as carbide dies, bush, valve seat, carbide rods and bars, providing superior quality tungsten carbide nozzle. XYMJ manufactures carbide nozzle, relying on 100% virgin raw materials and advanced wet-milling, pressing machines and sintering furnaces with high-precision grind machines, skilled workers to control the very high precision of each carbide part.

In order to address different working conditions, XYMJ has developed a variety of material grades, improving wear-resistant, hard-resistant brush performance, supplying carbide nozzles with superb quality, cost-effectiveness and various types. With an advanced automatic production process. The tungsten carbide nozzle produced by XYMJ, has excellent wear-resistant, high strength, corrosion resistance, long service life, high cost performance.

XYMJ has been focusing on various types of carbide nozzles for more than 20 years, with advanced technology, customize production and OEM & ODM available.

Life raft has been widely used in various types of navigation ships, playing an increasingly important role in emergency rescue, which is a safe and effective marine life-saving equipment. Compared with other emergency life rafts, inflatable life raft has the significant advantages of small size, lightweight, easy to use, stable performance, safe and reliable.

The liferaft is life-saving equipment without self-propelled capability, used by the crew in the ship. It is equipment that ships getting away from dangerous areas or emergency evacuation. It can be rapidly released into the water and floats over the surface. All kinds of life rafts have a certain buoyancy and can be protected from wind, rain, waves and sunburning with a ceiling, with food and water for survival. It can be stored in a temperature of -10 to + 65 ° C and applied within the temperature range of -1 to +30 ° C.

Two Types Of Life Raft – Rigid And Inflatable Types

Rigid life raft

The rigid life raft, also known as the traditional life-saving raft, its structure is made of galvanized iron, aluminum alloy plate, stainless steel plate. Then the cover is made from the flame retardant material. The top of the raft is provided with a fixed rigid canopy and an entrance, and the bottom is a wooden lattice. The raft is slipped under the water or put down the water with a hanging raft.

The traditional life raft is simple and cost-effective, but the volume is large, cumbersome less carrier.

Inflatable life raft

The inflatable life raft, which is the most widely used liferaft, can be inflated and opened automatically in a short time. It is made of rubber nylon cloth, which can be folded and stored with lightweight. According to its deployment method, there are two types including throw-over type and davit launched type. The most common is a throw-over life raft, and the davit launched liferaft is mainly used for passenger ships.

The davit launched liferaft is to hang life raft at ship side by launching equipment and go inboard from ship’s deck when inflating and to fall it down on the sea by davit. In case of failure in davit launching equipment, the life raft is also designed to be inflated automatically in the same way as throw-over type. It can be thrown out in an emergency, which can also be thrown into the water. The raft can automatically release and float on the water surface.

The self-inflating life raft is designed, when the sea surface is in the overturned condition since the top of the raft is circular, which can reduce contact surface with water, the center of gravity in the bottom of the life raft, after the inflatability is completed, it can be self-centered.

For more introduction, please visit the article of learning the life raft quickly.