Applications

Motor Laminations Stacks Bonding

At Sino, we make electric motors better. We know the motor core is the most important part of your product. It decides how well it uses energy, how powerful it is, and how long it lasts. We use a special process for this called motor lamination bonding. This method joins the thin metal plates inside a motor. This makes them strong and helps them work very well.

Our advanced motor lamination bonding service makes these features much better than old methods like welding or locking plates together. Our work helps your products stand out.

When you need the best performance, you can trust Sino. We give you a perfectly bonded core that provides a clear edge over your competition. It works by making huge cuts in wasted energy, providing better heat control, and offering the very best performance against Noise, Vibration, and Harshness (NVH). Our motor lamination bonding service is a partnership where we work with your engineers. Our goal is to change your motor into one solid, high-performing magnetic part.

Why Old Ways Don't Work Anymore

For a long time, people held motor plates together with simple methods. They used physical parts to fasten the plates, like rivets or stakes. Some even used welding, such as TIG/MIG welding or laser welding. But these old ways can cause problems:

They can be weak

Parts can get loose over time.

They can be noisy

The motor can vibrate and make a loud humming sound.

They waste energy

They create small gaps that hurt the motor's power.

They can damage the metal

Welding can harm the special steel plates. This harms the motor's power.

For products that need to be the best, the benefits of using glue for motor lamination bonding are very clear and easy to see when you compare it to the old ways.

Technology Comparison: Why Bonding Is Better

Feature / Performance Metric

Sino Adhesive Bonding

Welding (TIG, Laser)

Mechanical Interlocking

Core Loss / Efficiency

Excellent (Very little wasted energy)

Poor to Fair (Welding can create short circuits)

Fair to Good (Can damage the insulation)

NVH Performance

Excellent (Naturally stops vibrations)

Fair (Can add stress and shakes)

Poor (The metal plates can rattle)

Heat Movement

Excellent (Gets rid of air gaps that trap heat)

Good (Metal touches on the outside)

Poor (Air gaps are trapped between plates)

Structural Strength

Excellent (A single, solid, even structure)

Excellent (Very strong in the welded spots)

Fair (Not as stiff or strong against twisting)

Design Freedom

Excellent (No limits on the shape)

Fair (Needs spots on the outside for welding)

Poor (Needs space for locking parts)

Material Thickness

Excellent (Perfect for very thin metal plates)

Poor (Hard to do on plates thinner than 0.35mm)

Fair (Thin metals can tear)

The old ways have clear limits. For example, welding can cause electrical short circuits. Interlocking gives you less power in the same space and makes more noise. Our advanced motor lamination bonding processes solve all of these problems. At Sino, we have a better way. Our use of adhesive for motor lamination bonding is the future for all types of motors.

Big Benefits of Sino's Motor Lamination Bonding

Choosing Sino’s motor lamination bonding service is a smart choice to get the best results. Our process gives you a group of good things you can’t get with old assembly methods. We help you build a better product that is stronger and more dependable.

More Power, Less Waste: A Huge Drop in Wasted Energy

Our motor lamination bonding process keeps each metal plate electrically separate from the next. This fixes the main reason for energy loss, called eddy currents. This means the motor uses less electricity to do the same job. This allows you to use thinner steel plates, helping your motors get higher efficiency ratings. It also means less wasted heat and a much longer run time for battery-powered products. Our bonding process creates very high resistance between plates, keeping the energy loss inside each thin sheet. Customers who switch from welded cores have seen energy loss drop by 20% to 50%. This is a direct and big improvement in motor efficiency. This is very important for meeting standards set by groups like the U.S. Department of Energy (DOE).

A Strong and Stable Core: Very Strong Structure

We give your motor a much stronger structure. A core bonded by Sino is like a single, solid block. It is very strong and can handle a lot of force and high spinning speeds. This even bond stops the plates from spreading apart. It makes sure the motor’s strength and performance last for its entire life. The final bonded core is very strong and stiff. This gives it great resistance to impacts and stops the plates from peeling apart. Our motor lamination bonding process spreads stress out evenly, so the whole core is strong.

Quiet and Smooth Running: Better NVH Performance

Nobody likes a noisy motor. The layer of glue in our motor lamination bonding acts like a cushion. It soaks up tiny vibrations and gets rid of the rattling or humming you often hear in motors put together with mechanical parts. A bonded stack acts like a single, solid part. This results in a very quiet and smooth-running motor that makes customers happy. A bonded core is a solid, highly damped cylinder. Its natural vibration points are pushed far above the motor’s normal operating speeds. This leads to a measurable drop in the sound level (dB) while the motor is running. This is very important for products like luxury cars and quiet home appliances.

Cooler and Longer Life: Better Heat Movement

Our motor lamination bonding process uses a special glue that helps move heat. This glue fills in the tiny air gaps that trap heat. This creates a clear path for heat to get out of the motor. This improved heat management lets your designs be more powerful and run longer without risking damage from getting too hot. Putting a heat-moving polymer in place of air gaps means the motor does not get as hot when it’s working hard. This directly lets you increase your motor’s continuous power. We also provide excellent protection from rust, so the motor parts will last a long time.

Better Design: More Freedom to Design

Bonding gets rid of the need for interlocking tabs or weld spots that take up valuable space. This frees up your engineers to use the entire metal plate to make the magnetic part work as well as possible. This allows for smaller, lighter, and more powerful motor designs. With motor lamination bonding, you can get more power from a smaller motor. This gives you more power for the size and improved twisting force (torque). This freedom helps engineers create amazing new things. We can also fit more power into the same space. Most importantly, our process protects the special steel and improves its magnetic properties.

How Sino's Motor Lamination Bonding Process Works

At Sino, we have made our methods for stacking plates perfect. We use two main methods to make sure we have the best choice for your project. We can use plates that come with a self-bonding glue already on them for making lots of motors quickly. We can also apply glue ourselves for special projects. It all starts with the best materials, from cutting the plates to the final hardening of the glue. We also make sure the metal is perfect with steps like heat-treating the electrical steel.

1. Glue Bonding Lamination

This is our main method for strength and custom designs. It is also called full-surface bonding.

  • Pick the Right Glue: We have many types of adhesives for motor lamination bonding. We use very strong structural glues for motors. These include epoxy glues, like single-part or two-part epoxies. We also have other glues for special jobs.
  • Apply the Glue: We use careful methods to apply the adhesive. This could be a roller that paints a thin, even layer. It could also be applying dots of glue in specific spots. We often use a special bonding varnish.
  • Stack and Press: We place each glued plate into a special tool. This tool holds everything perfectly straight.
  • Cure for Strength: The stack goes into a special oven. The heat and pressure turn the glue into a rock-solid bond. This curing step is what makes the core so strong.

2. Self-Bonding Laminations (Backlack)

This way is great for making many motors very quickly. It is also known as the self-adhesive process. The metal plates come to us with a special glue, called a Backlack coating, already on them. We use this advanced Backlack technology to speed things up. The process of stamping and bonding can happen at almost the same time. Heat from our tools activates the glue, and the core is bonded as it is built.

The Best Materials for Your Motor

The quality of a motor starts with its parts. Sino uses only the best metals and glues for our motor lamination bonding process.

Metals We Use:

  • Silicon steel laminations: This is the most common material. We use different types of electrical steel.
  • Amorphous metal alloys: These are special new metals. They are perfect for motors that run at high speeds because they waste almost no energy.
  • Soft magnetic composites: These special powders can be molded into complex shapes for unique motor designs.

Adhesives We Use:

  • Thermally conductive adhesives: These glues are great at helping heat move out of the motor.
  • High-temperature adhesives: These are perfect for motors that run very hot and hard.
  • Electrical insulation adhesives: These glues do not conduct electricity. They are non-conductive and help keep the motor safe. They are a key part of the insulation that stops energy from leaking between plates.

Every metal plate gets a special insulation coating. This coating protects the metal and helps it work better. All these parts work together to guide the magnetic energy flow and reduce wasted energy.

Where You Can Use Sino's Bonded Cores

You can find cores made with our motor lamination bonding in many different industries. Our bonded motor cores are used in many exciting products. We are a key part of modern electric transportation.

Automotive

We make cores for electric vehicle (EV) motors and hybrid electric vehicle (HEV) motors. Our work is found in powerful motors that drive the car and other car parts.

Industrial Automation

We build cores for strong industrial motors and precise servo motors used in factories.

Aerospace & Defense

Our light and strong cores are perfect for planes and drones.

Consumer Appliances

You can find our technology in quiet air conditioning systems and many other home appliances.

Medical Devices

Our precise cores are used in sensitive medical equipment.

Green Energy

We are proud to build parts for renewable energy systems. This includes generator cores for wind turbines and transformer cores for the power grid.

From the main stator core and rotor core to a complete motor assembly, Sino can help. We can help with every part of the motor system, including providing complete heat management solutions.

Sino's Promise: Quality You Can Trust

We ask our partners to look at the Total Cost of Ownership (TCO). This means thinking about the long-term savings. The money you save from a better motor often outweighs the starting cost. Our Promise of Top Quality is built into every step:

Certified Raw Materials

We check and approve all steel and glues very carefully.

In-Process Monitoring

We use automatic camera systems to check important measurements as we build.

Process Control

We control the stacking, alignment, and curing steps precisely for a perfect bond.

Final Testing

 We check finished cores with advanced machines to test their measurements, energy loss, and bond strength.

We follow the highest standards in everything we do. Our work is respected by leading engineering groups. We also watch the amazing work done by top research labs to stay ahead of the curve.

Feature

Sino’s Bonding Solution

Why It Matters for You

Core Strength

Uses strong glues to make a solid part.

Your motor will last longer and handle tough jobs. It will be stronger and more dependable.

Motor Efficiency

The glue fills all gaps to stop energy loss.

You get a more powerful motor that uses less electricity, saving money and energy.

Noise Level

The bonding layer soaks up shakes and rattles.

Your product will be very quiet, which customers love.

Heat Control

Special glues help heat flow out of the core.

The motor runs cooler, so it is less likely to break down. This is part of our heat management solutions.

Design Freedom

No need for old methods like tabs or locks.

Your engineers can design smaller, lighter, and more powerful motors for the future.

Contact us >>

In today’s world, everyone wants motors that are more efficient and more powerful. The way you assemble your motor core is very important. Sino’s advanced motor lamination bonding provides the engineered solution to improve every key part of your motor’s performance.

Contact our engineering team today to talk about your next project. Discover how a partnership with Sino can set you apart from the competition.