KENENG spring has a good reputation in the domestic market by adhering to more than 10 years of manufacturing experience in spring industry. KENENG spring is widely applicable to occasions with small spaces and large load and shock absorption devices, such as playing the role of buffer in the elevator industry. Equipped with sophisticated production equipment and a domestic leading automatic test system for spring mechanical properties, the manufacturing process is fully controlled in accordance with the ISO9001:2008 quality assurance system. It has introduced advanced Taiwan CNC one-time forming equipment, with stable and reliable product quality and an annual production capacity of 20 million pieces.

As a custom spring manufacturer, you can choose customaztion as follows

Material, Finishing

Dimension: material thickness &width, work length (torsion angle), ID, OD

The end type.

Spring force/ work load

Volute spring

A volute spring, also known as a conical spring, is a compression spring in the form of a cone (somewhat like the classical volute decorative architectural ornament). Usually has a spatial truncated cone shape. Under compression, the coils slide past each other, thus enabling the spring to be compressed to a very short length in comparison with what would be possible with a more conventional helical spring. The role is similar to the variable pitch cylindrical helical spring. After the loading reaches a certain degree, the spring is gradually tightened from the large coil to the small coil. The stiffness increases gradually and the natural frequency is variable It is conducive to eliminating or eased resonance and the anti -resonance capacity is strong. This spring structure is compact and stable. It is mostly used to withstand large loads and vibration reduction. For example, suspension springs applied in heavy vibrating screen and automobile transmission.

Wire spring

The elasticity coefficient of the thickness and density for the wire spring from top to bottom, is a fixed value. This design of this spring can make the vehicle get more stable and linear dynamic response, which is conducive to the driver and better controlling the cars.It is mainly used for performance oriented modified vehicles and competitive vehicles.

Choosing the right spring wire materials

when developing a torsion, extension, or compression spring will make all the difference between enjoying a cost-effective, successful project or an expensive, failed project. In addition, certain factors directly impact your choice of optimum material for spring projects, such as tensile strength, corrosion resistance, elastic deformation, electric conductivity and operating temperature/environment.

Before selecting the right type of spring wire material, consider the environment impacting the operation of the spring, the amount of deflection, frequency of cycles and the ratio of wire form or spring expense relative to the cost of the overall project.

Flat spiral spring

Compared with other springs, the spiral spring can absorb larger energy in the same space, and the friction between the plates can be used to attenuating vibration. It is often used to absorb thermal expansion deformation. The flat spiral spring also known as a clockwork spring is a spring with torque; Under the action of torque, the spring material produces bending elastic deformation, which makes the spring produce torsion in the plane. The deformation angle is proportional to the torque. Flat spiral springs are used in many fields and industries.

KENENG is an excellent spring manufacturer, specializing in the design and production of custom and stock springs of multiple sizes and configurations, supporting customizing all kinds of springs like disc springs, torsion springs, leaf springs, coil springs, spiral springs, etc. Springs made by KENENG come in many forms and can be used in many ways. KENENG can produce high-quality springs with high precision.

Torsion spring

The torsion spring is under the torsion load, mainly used for compression, energy storage and the elasticity of the transmission system. Torque causes the spring to rotate on its axis while resisting or applying a load. So we think of torque as the rotational equivalent of the linear force driving the compression and extension springs. It has a linear characteristic line and a wide applications, such as measuring metering and the compulsory air valve closure mechanism. This type of spring is normally a close wound but can have a pitch to reduce friction between the coils. They provide resistance to forces applied by rotation or twisting. Torsion springs can be designed to work in a counter-clockwise or clockwise rotation, thus determining the direction of the wind depending on the application.

Disc spring

Disc spring has a strong capacity for bearing buffer and damping. Different combinations can obtain different characteristics, widely used for pressure safety valve, automatic transfer device, reset device and clutch. Disc spring according to its use can be divided into anti loose disc spring, high temperature pre – tightening disc spring, high torsion pre – tightening disc spring, buffer stretching disc spring. Due to the characteristics of variable stiffness and compact installation, it is widely used in the mechanical equipment industry, petroleum industry, automobile industry and aerospace industry, and has replaced the cylindrical spiral spring in a large range.

Spiral spring

Compared with other springs, the spiral spring can absorb larger energy in the same space, and the friction between the plates can be used to attenuating vibration. It is often used to absorb thermal expansion deformation. The disadvantage is that the gap between the board is small and difficult to quench and the spray treatment cannot be performed. In addition, the manufacturing accuracy is not high enough. It can be used as measuring element and pressing element.

Battery springs

Battery springs are a type of electronic hardware, usually made of copper, iron, or stainless steel. The battery spring generally plays a very important role in the composition of the battery. Because the battery springs need to energize the battery, choose materials that conduct electricity. These raw materials are usually electroplated with silver, nickel, and CT. When the battery is installed, the battery spring on the conductive film is squeezed, and the center of the spring touches the PCB to form a loop. This allows the current from the battery to flow to where it is needed to drive the device. Battery spring to conduct electricity, the effect is very good. It is widely used in various network products, communication products, computer products, household appliances, distribution equipment, educational toys, and so on.

Die spring

The die spring refers to the rectangular die spring. Generally speaking, the die spring is the spring used by the mold. Rectangular die spring has the characteristics of small volume, good elasticity, high stiffness, high precision, rectangular production material, surface color separation spraying (plating) to distinguish different load, beautiful appearance, and so on. The die spring is generally dominated by the metal spiral die spring, widely used in mold, fixture, industrial clutch, brake components, and various mechanical components.

Screws refer to a tool that gradually tightens a part using the mathematical and physical principles of the beveled circular rotation and friction of an object. Screws are a common fastener that is widely used in daily life and production. The general material is plastic or metal, and the grooves engraved on the surface are called threads, which are cylindrical.

Screws are ubiquitous in industrial production and daily life. Therefore, screws are also known as the rice of industry. The application scope of screws includes electronic products, mechanical products, digital products, power equipment, and electromechanical mechanical products. Screws are also widely used in vehicles, ships, chemical experiments, hydraulic engineering, and so on.

Dongguan KENENG International Trading Co., Ltd is a professional screws manufacturer and trading integrating company, specializing in the design, production, and sales of various carbon steel, stainless steel, copper parts, titanium alloy products such as British and American standard Cup heads, hexagon bolts, self-tapping screws, drilling screws, drywall screws, stud bolts, U-bolts, anchor bolts, welding screws, eye bolts, SEM screws, set screws, carriage screws, nuts, gaskets, electronic small screws, pin shafts, springs, car parts, high-grade building expansion bolts, etc. It is widely used in machinery, mold, automobile, motorcycle, aerospace, agricultural machinery, electronics, construction, household appliance, and other fields. We have a large number of quantities of standard Metric and Inch screws in stock. For a long time, we have been serving new and old customers with the concept of honesty, pragmatism, innovation, and win-win, and have a good reputation in the hardware industry.

A custom fastener is needed when engineering specifications require a fastener to function in an application that is not an industry standard. KENENG is also a custom screw manufacturer. Customized fasteners are available for special lengths, and tolerances regarding length or body diameters. Or due to certain strength requirements or corrosion situation requirements, these special cases may require special materials. In many of these situations, the customer’s engineering department will provide a CAD drawing showing all aspects of the fastener required for the company’s production.

KENENG can produce both standard and non-standard screws, we have a professional R & D team to produce all kinds of non-standard screws according to customers’ requirements. We are able to produce electronic precision screws, extra-long screws, step screws, shoulder screws, color screw, self drilling screw, wood screw, machine screw, drywall screw, brass screw, and self tapping screw, as well as other kinds of special-shaped screws.

KENENG is a professional screw manufacturer with more than 20 years of experience, which can provide customized services, any quote is warmly welcomed.

Fasteners are a kind of mechanical parts which are widely used for fastening connections. Fasteners are used in a wide range of industries, including energy, electronics, electrical appliances, construction, machinery, chemical industry, metallurgy, mold, hydraulic, and so on. In all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, instrument, and apparatus, you can see all kinds of fasteners, which is the most widely used mechanical components. It is characterized by a wide variety of specifications, performance, and use of different, and standardization, serialization, and universalization of the degree are also extremely high.

KENENG is a fasteners manufacturer with more than 10 years of manufacturing experience. Our factory covers an area of 20000 square meters, our company has IS0 9001 quality management system certification and ROHS, REACH certification, which is a set of product research and development, production and manufacturing, sales, and service in one of the professional production of stainless steel fasteners and high strength fastener metal products enterprise. As one of a fastener supply companies, we have advanced multi-station upsetting equipment for fasteners and cutting machine tools for various special-shaped fasteners. The annual sales volume of various fasteners reaches 100,000 tons. The company has been listed as a high-quality fasteners supplier by customers many times.

Materials can be customized according to the needs of copper, iron, aluminum, and stainless steel, surface treatment can be done according to customer requirements white zinc, black zinc, yellow zinc, nickel, chromium, black, electrophoresis, Dacromet, gold, silver, copper and so on. We are also a very popular titanium fasteners supplier and stainless steel fasteners manufacturer.

1. How is the fastener made?

Fasteners production process can be basically divided into 7 steps, respectively for annealing, pickling, wire drawing, molding, grinding teeth, heat treatment and surface treatment.

Widely Application Industries

Depending on the fastener application, we are also an automotive fastener supplier, aircraft fasteners supplier, aerospace fasteners manufacturer, and so on.

Aerospace

Automobile

Construction

Energy

Electronics

Electrical appliances

Machinery

Chemical industry

Metallurgy

Mold

Hydraulic

Furniture

Car key CR2032 battery holder

This car key battery holder can hold one CR2032 battery. The battery can output 3.0V voltage and this holder can be used as power supply for computer main board, remote control for car key, electronic dictionary, calculator, smart lock, etc. Keyu brand CR2032 battery holder is made of high-quality materials, combined with advanced production equipment and strict quality control, for you to produce 100% good products.

CR2032 battery holder with copper sheet

The calculator battery holder can keep your batteries organized and protected. It is designed with copper sheet for easy to connect. This Calculator battery holder with copper sheet is perfect for the devices need a 3V external battery.

3V cell battery holder

This 3V cell battery holder can hold one CR2032 battery. The battery can output 3.0V voltage and this holder can be used as power supply for computer main board, remote control for car key, electronic dictionary, calculator, smart lock, etc. Keyu brand CR2032 battery holder is made of high quality materials, combined with advanced production equipment and strict quality control, for you to produce 100% good products.

Battery Type: Round plastic battery holder

Place of Origin: Dongguan, China

Color: Black

Material: PA66+GF V0 Resin

Product name: CR2032 battery holder

Style: Holder(open)

Mounting Type: Custom

Operating Temperature: -10-100℃

Size: 26.6*23.2*8.8mm

Termination Style: copper sheet

Nominal Voltage: 3.0V

This Car key battery holder can be made to 3.0v battery output

The opposite side is the same as the picture shown.

The perfect external power source for electronic DIY.

Holds 1 CR2032 battery.

Easy install, convenient to use.

High-quality plastic material.

The perfect external power source for computer main board, remote control for car key, electronic dictionary, calculator, smart lock, etc.

i battery holder snap

This i battery holder snap can be connect to one 9V battery. The battery can output 9.0V voltage and this holder can be used as power supply for measuring meters, wireless walkie-walkie, wireless microphone, radio etc. Keyu brand i battery holder snap is made of high quality materials, combined with advanced production equipment and strict quality control, for you to produce 100% good products.

T battery holder snap

This T battery holder snap can be connected to one 9V battery. The battery can output 9.0V voltage and this holder can be used as power supply for measuring meters, wireless walkie-walkie, wireless microphone, radio etc. Keyu brand T battery holder snap is made of high quality materials, combined with advanced production equipment and strict quality control, for you to produce 100% good products.

Battery Type: Rectangular plastic battery holder

Place of Origin: Dongguan, China

Color: Black

Material: ABS Resin

Product name: Battery holder snap

Style: Holder(open)

Mounting Type: Custom

Operating Temperature: -10-100℃

Size: 24.1*12.5*7.3mm Length of wire=150mm

Termination Style: Wire

Nominal Voltage: 9.0V

Product Feature And Application

1. This i battery holder snapcan be made to 9.0v battery output

2. The opposite side is the same as the picture shown.

3. The perfect external power source for electronic DIY.

4. Holds one 9V battery.

5. Easy install, convenient to use.

6. High-quality plastic material.

7. The perfect external power source for computer main board, remote control for car key, electronic dictionary, calculator, etc.

The plate magnet is a very common product in magnetic components. It can be seen in various life and production scenarios. It is mainly used in electroacoustics, permanent magnet motors, communications, automotive electronics, magnetic machinery, aerospace, computers, home appliances, medical devices, office automation, toys, packaging boxes, leather products, magnetic jewelry, and other fields.

Neodymium magnets are also called NdFeB magnets, which are tetragonal crystals composed of neodymium, iron, and boron (Nd2Fe14B). In 1982, Sumitomo Sasakawa, a special metal, discovered neodymium magnets. The magnetic energy product (BHmax) of this magnet was larger than that of a samarium cobalt magnet, and it was the largest material in the world at that time. Later, Sumitomo successfully developed the powder metallurgy process for special metals, and General Motors successfully developed the melt spinning process to prepare Nd-Fe-B magnets. This kind of magnet is the permanent magnet whose magnetism is second only to the absolute zero holmium magnet, and it is also the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic products, such as earphones, mobile phones, battery-powered tools, and so on.

KENENG neodymium plate magnets could be customized in different sizes, offering a superior pull performance to other materials with the same volume, thanks to their NdFeB properties. We can manufacture a wide variety of super-strong neodymium magnets.

Neodymium magnet, also known as NdFeB magnet, is a tetetic crystal system made of Neodymium, iron and boron (Nd2Fe14B). In 1982, Sumitomo Special Metals’ Misaki Sagawa discovered neodymium magnets. The magnetic energy product (BHmax) of this magnet was greater than that of a samarium cobalt magnet, making it the largest material in the world at the time. Later, Sumitomo Special Metals successfully developed the powder metallurgy process and general motors successfully developed a melt-spinning process to make Ndfeb magnets. The magnet is now the second most magnetic permanent holmium zero magnets and the most commonly used rare earth magnet. Ndfeb magnets are widely used in electronic products, such as mobile phones, hard disks, earphones and battery-powered tools.

Rod magnets are made from high power magnets and stainless tubes by well welding and polishing, zero leakage and waterproof. After 4 times of polishing processes, the roughness can meet Ra0.6, widely used in food and pharma- ceuticals industry.

KENENG is a professional neodymium magnet rod manufacturer. We can manufacturer neodymium magnet, single-sided magnet, rubber magnet, ferrite black magnet, circular strong magnet, ring strong magnet, countersunk strong magnet, etc., and has a complete and scientific quality management system. KENENG has always been recognized by the industry for its integrity, strength, and high product quality.

Block magnet is very popular for its cost-effective. The permanent magnet material based on the intermetallic compound Nd2Fe14B make it has good mechanical properties. At the same time, the chemical composition in the production process is adjusted and the surface coating treatment method is adopted to make it more applicable.

KENENG support customized neodymium block magnets according to customers’ drawings. Including :

Product size

Magnetic strength

Logo printing

Shape customization and drilling can be requested

Surface treatment customization

Packaging

Samarium cobalt magnets have a high magnetic energy product and extremely low-temperature coefficient. The maximum working temperature can reach 350 °C. When the working temperature is above 180 °C, its maximum magnetic energy product (BHmax), coercivity and Both temperature stability & chemical stability exceed NdFeB permanent magnet materials.

We are an experienced samarium cobalt magnet manufacturer. KENENG has 15 years of experience in designing, manufacturing, painting, and exporting magnets all over the world. We have won a good reputation in the industry with excellent and stable quality, prompt delivery, and quick response.

We specialize in the production of NdFeB strong magnets, single-sided magnets, rubber magnets, ferrite black magnets, ring strong magnets, round strong magnets, square strong magnets, bar strong magnets, special-shaped strong magnets, trapezoidal strong magnets, etc. KENENG has a complete and scientific quality management system. Our company has been recognized by the industry for its integrity, strength, and product quality.

We have MSDS/ROHS/REACH/ISO 9001 certificate. We are an excellent smco magnet manufacturer.

Custom Smco Magnet

KENENG is a samarium cobalt magnet supplier. We support customized Smco magnets according to customers’ drawings & requirements. Including :

Grade: SmCo5/Sm2Co17

Size: According to customers’ requirement

Shape: Disc/Block/Arc/Ring/Other Customized Shape, drilling can be available

Coating: Some applications require coating such as Ni-Cu-Ni and Zn(Cr3+).

Customized Packaging

Aluminum-nickel-cobalt (AlNiCo) is the earliest developed permanent magnet material, which is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. AlNiCo permanent magnet materials were successfully developed in the 1930s. At that time, it had the best magnetic properties and small temperature coefficient, so it was most widely used in permanent magnet motors. After the 1960s, with the successive advent of ferrite permanent magnets and rare earth permanent magnets, the application of AlNiCo permanent magnets in motors was gradually replaced, and the proportion showed a downward trend.

AlNiCo has high coercivity and Curie temperature. Aluminum nickel-cobalt alloy is hard and brittle, and cannot be cold worked. It must be made by casting or sintering process. Alnico alloy can generate magnetic fields up to 0.15 Tesla.

Dongguan KENENG International Trading Co., Ltd is located in the rare earth raw material processing center of China. The company has 15 years of experience in AlNiCo magnets design, manufacturing, coating and export to all over the world, we have won a good reputation in this industry for our excellent and stable quality, prompt delivery and fast response.

AlNiCo magnet is an alloy made of aluminum, nickel, cobalt, copper, iron, and other materials. According to the different processing technology, it is divided into two types: cast AlNiCo and sintered AlNiCo. Widely used in aerospace and military internal magnetic voltage and ammeters, electronic energy meters, multimeters, flow meters, etc.; various magnetic sensors, polarization relays, temperature, and pressure controllers; mobile phone buzzers, hearing aids, receivers, micro speakers; Car ignition starter, car, and motorcycle odometer, etc.

KENENG is a custom AlNiCo magnet manufacturer, for your exact specifications using our manufacturing facilities and experienced team of engineers. Just let us know what you are looking for by sending us a request for a quote or contact us today, and we’ll work with you to determine the most economical solution for your project.

The magnetic powder brake is magnetic, ensuring the working operation stability. It has always been used to adjust the stop and loading of the drive speed stop in industrial applications and can control torque tension without other equipment. The power magnetic powder brake will not cause equipment wear loss.

What Is The Magnetic Powder Brake

The magnetic powder brake, also known as magnetic particle brake, is based on the electromagnetic principle, transmitting torque by magnetic particle, which means that the brake operation can be managed and adjusted, to achieve excellent power transmission, no friction and no wear. It has the advantages of fast response speed, simple structure, no pollution, no noise, no impact vibration, energy-saving, etc. It has been widely used in papermaking, printing, plastic, rubber, textile, metallurgy, and other unwinding and winding tension control in coil industries.

Working Characteristics Of The Magnetic Powder Brake

The torque is increased. Even if the drive end and the driven end are not fully connected, the torque will rise to the set torque set by the current setting, and then accelerate at a certain torque. This function will greatly match the thermal capacity of the clutch, suitable for buffering start. If the starting current is controlled, the starting torque will also change rapidly. At the same time, due to use of the magnetic powder with advantages of heat-resistant and wear-resistant, the permissible connection power is large, and continuous slip can be used in the allowable continuous slip power range.

Winding And Unwinding Principle Of The Magnetic Powder Brake

Unwinding

The tension of the unwinding is controlled by the brake torque of the magnetic powder brake. As the continuous reduction of the winding diameter, the braking torque must be continuously reduced. The torque of the magnetic powder brake is automatically controlled by the tension controller so that the tension is constant.

Winding

The final winding speed is normally higher than the line speed of the material, so the magnetic powder clutch working in a slip state, the tension is controlled by the torque of the powder clutch. In order to keep the tension, The torque of the powder clutch brake must be increased or decreased according to the size of the web.

How To Lengthen The Service Life Of The Magnetic Powder Brake

In order to ensure the working quality of the magnetic powder brake, the high-quality magnetic powder must be adopted, which has the advantages of highly magnetic, high magnetic inductance strength, large transmission torque, etc.

The magnetic powder brake should not be operated in a humid environment, so as not to damage the magnetic powder. Relevant maintenance is required to ensure long service life.

The installation environment of the magnetic powder brake should be selected in a dry, ventilated environment, avoiding moisture and dust.

When the magnetic powder clutch and magnetic powder brake are applied to continuous sliding in the winding and unwinding process, the life of the magnetic powder will vary depending on the condition of the use and relative sliding speed, such as the high surface temperature, heavy load, damp, etc. However, when it is usually used under the allowable continuous slip power, the service life of the magnetic powder brake clutch can achieve about 5000 to 8000 hours when the torque is reduced at the rated current. If used at rated torque, since the magnetic powder brake and the magnetic powder clutch can be continuously sliding used, the service life can be extended. In addition, even if at the same slip power, when the sliding speed and the relative rotation speed continue to be in a high state, the lifetime of the magnetic powder is shortened, so it is recommended to set a smaller relative speed. Generally, relative to the allowable continuous slip power, if it can be used under relatively good conditions, it is also possible to lengthen the service life of the magnetic powder.

Summary

The magnetic powder brake is a multi-purpose and high-performance automatic control element, which adopts magnetic powder as working media, controlled through an exciting current to achieve the purpose of controlling braking or transmitting torque, widely applied for tension control of the unwinding and winding, dynamometer loading and braking of the transmission machinery.

Solventless lamination technology is an environmentally-friendly composite technology that has developed rapidly in recent years. It has the advantages of no solvent residues which has no pollution to the atmospheric environment, significantly reducing energy consumption, fast machine speed, etc. In the solvent-free lamination process, tension control is extremely important and must be very accurate. Tension control mainly includes the control for unwinding tension, film tension, auxiliary unwinding tension, winding tension, and winding taper.

The Application Of Tension Control In Solventless Lamination Machine

The tension of the solventless lamination machine is generally divided into four parts, including the first unwinding tension, the second unwinding tension, channel tension and winding tension. In the process of changing the roll diameter and production speed, solventless lamination has a requirement of constant tension. On the basis of ensuring the quality of the composite material, tension control of solventless lamination machine plays an extremely important role in improving the quality of the windings.

It is important to ensure that stable tension and winding integrity due to the frequent operations of starting and shutdown, acceleration and deceleration for solventless lamination equipment.

The floating roller has the function of absorbing kinetic energy. When the first unwinding tension is required to be constant, the second unwinding tension and the channel tension control adopt the low friction cylinder to control the swing rod tension control form to ensure the solvent-free. During the acceleration and deceleration, with the stable tension of the lamination machine, the membrane tension and relaxation caused by tension fluctuation are the smallest. If the first unwinding tension, the second rewinding tension and the channel tension are controlled by the bearing tension sensor, the first retraction unit harness, the second retraction unit harness, the coating harness, and the laminating harness are completely synchronized to ensure stability, acceleration and deceleration during the stretching process.

In addition, the flexibility of the guide roller rotation is an important factor in ensuring the stability of tension control during the acceleration and deceleration process. Under normal circumstances, the rotation of the guide roller is only synchronized with the moving movement of the film, so the ink on the film surface will not be scratched, which requires the static friction between the film surface and the guide rolls greater than the resistance of the roller. Therefore, the guide roller must be flexible with high assembly precision. The unwinding tension and channel tension of solventless laminator both have a requirement of constant tension. There are three winding methods, which include linear windings, hyperbolic windings, and parabolic windings.

The solvent-free adhesive is characterized by a solid content of 100%, low viscosity, low initial viscosity. If the composite intima is a stretched film such as PE film and CPP film, it is tried to use a hyperbolic winding method. When rolling up, the inner winding volume is relatively loose and the composite film is not wrinkled. The wrapped diameter is closely wound on the surface, with no bubbles on the surface.

Further, the winding pressure can also play a role of an auxiliary winding, and the air between the films is discharged, some of which have the effect of eliminating static electricity, which can increase the tightness and uniformity of the winding.

Key Points For Tension Control Of Solventless Lamination Machine

1. Generally speaking, the unwinding tension is based on the auxiliary unwinding tension. Increasing the main unwinding tension to match the auxiliary unwinding tension, making the composite film finally reach a flat straight state, the unwinding tension is the minimum tension without a wrinkle.

2. The tension of the film which is gluing, is slightly larger than the unwinding tension, which is used to tract the film, so that the corresponding coated steel roller does not require a large drive current.

3. The winding tension is slightly greater than the unwinding tension, the Initial viscosity of composite membrane which the winding tension needs to withstand, is only about 0.2 N / 15mm, and the winding taper is controlled within 20%, with the increase of coil diameter, the decreasing degree of tension is slower than dry lamination.

4. For the films of different materials, the tension in each part is different in the lamination process. Even the film has the same material and the tension is also very different depending on the different composite structures. For example, in the PET / PE structure, because PE is easy to stretch, its tension is substantially from 3N to 5 N. PET is contended with the shrinkage stress of P and its tension is relatively large, substantially 20N. But in the composite structure of PET/paper, since the stretchability of the paper is better, PET only requires the minimum tension, typically 5N.

Methods For Checking Whether The Tension Control Is Appropriate For Solventless Lamination Machine

Shut down the solventless machine, making a cut on the composite film with a blade at the winding position and the most ideal state is that the composite film remains flat. If the composite film is curled in a direction, which indicates the tension of the film is too large, the tension of the film should be appropriately reduced or increasing the tension of the film in another layer.

Summary

During solventless lamination, the requirements for tension control are higher than that of ordinary compounds. The solvent-free lamination machine tension control has high requirements, making the elongation of the two-layer material rolls as consistent as possible through accurate tension control to ensure that the two-layer coils don’t produce relative slip during the solventless laminating process. Accurate tension control is the premise of ensuring the quality of composite films.