Backlack Self Bonding Lamination Stacks In China

From stamping to stacking motor lamination stacks, we innovate step by step. Lamination bonding is a new technology in our company. The self-bonding process without the need for additional adhesives, results in a more streamlined and efficient manufacturing process.

Bonding Varnish/Backlack Technology To Bonding Lamination Stacks

Lamination bonding represents a groundbreaking advancement in the design and manufacturing of electrical machinery components. Stator rotor stacks the lowest iron loss for high-efficiency motors is important.

Stator and rotor cores are typically constructed from thin sheets of silicon steel, which are stacked together in order to minimize eddy current losses.

The laminations use bonding varnish/backlack to bonded in order to create a stable core. Unlike traditional methods that rely on interlocking teeth or welding points to secure laminations, This bonding lamination technology is used to reduce interlaminar loss and corrosion.

As a professional motor lamination stacks manufacturer, whether you need to integrate into the punching process (interlocking, full-face bonding, or spot bonding stacking process) or those downstream from the punching process (welding, cleating, riveting stacking process).

Motorneo custom tailors manufacturing and assembly solutions for your company’s specific assembly requirements.

Materials Used in Self Bonding Laminations

Bonding materials

EB540, EB546, EB548	EB540, EB546, and EB548 are mainly used in large motor cores such as rail transportation and wind power.
EB549	EB549 and EB549 Rapid are mainly used in small and medium-sized motor cores such as electric vehicle motors.
Magna-Tac E645	Magna-Tac E645 is used for bonding stack laminations used in stators, rotors, gyros, servomechanisms, synchros, transformers, and magnetic amplifiers.
Magna-Tac F310	Magna-Tac F310 is also designed for high temperature applications including motor laminates and transformer cores.
3M™ Scotch-Weld™ 2290	3M™ Scotch-Weld™ 2290 is ideal for coating on laminated steel cores of electric motor stator and rotor assemblies as well as coils.
Magna-Tac TR-8899	Magna-Tac TR-8899 is a one part formulated thermosetting epoxy designed to adhere metals and alloys in transformer cores, as well as electric motor rotors and stators.
Z, Backlack, Suralac 9000	Suralac 9000 Silicon steel motor stator laminations with C3 Back-lack Type insulation.
PE75W, PE49	Waelzholz’s bonding varnish (variations: PE75W, PE49) bonds lamination stacks for electric motors.
Permabond®	Permabond single component epoxies, surface activated acrylics, cyanoacrylate, and UV/Anaerobic cure adhesives to adhesives electric motor laminations.
DECJ0705	DECJ0705 is suitable for brushing and bonding between silicon steel sheets in the stator core of high-voltage large generators during the lamination process.
DELO DUALBOND HT2990	DELO DUALBOND HT2990 is a high temperature resistant structural adhesive capable of light prefixation. It is mainly used for lamination bonding and lamination stacking in motor manufacturing.

electrical steels materials

B20AT1200	B20AHV1200	B27HAV1400	B30AHV1500	B30AHV1500 – Z1
B35A250	B35A250 – Z	B35A270	B50A310	B50A470 – Z
B50A470	B50A400	B50A800	10SW1000	15SW1200
20SW1200	25SW1250	25SW1250H	25SW1300	27SW1400
30SWH1500	35SW270 – Z1	35SWH1900	35SWYS5000	50SW400
50SW400 – Z1	20TWV1200	20TWV1200 – Z1	25TWV1300	27TWV1400
27TWV1400 – Z1	35TWG250 – Z	35TW250	50TW400	10JNEX900
NO20-1200	20CS1500	20JNEH1200	20JNEH1500

Other materials

Amorphous Metal Alloys

Ni-Fe Magnetic Alloy

Cobalt Fe 1J22/Hiperco 50

Nickel Fe 1J50/VACOFLUX 50

Cobalt-Fe Magnetic Alloy

Adhesive Bonding Process Of Lamination Stacks

Coating

Our Lamination Bonding process uses a roll coat process that applies an insulating adhesive bonding agent to the motor lamination sheets.

Curing

The bonding agent is then hot cured. In case of moderate curing temperature a dry, flexible and still reactive coating can be achieved.

Stamping Or Laser Cutting Or Wire-EDM Cutting

The coated lamination sheets are often punched, laser-cut, or wire-EDM into the desired shapes and dimensions.

Custom-Built Fixtures

We can design lamination fixtures to be custom-built for your application. The fixture holds the lamination in the correct position and ensures that pressure is applied evenly.

Stacking

The laminations are then stacked in a straight or skewed manner based on the customer’s drawing call out.

Second Curing And Bonding

By application of pressure and heat the bonding takes place by intermediate softening and curing of the coating for a second time.

Once the final cure is complete, the self bonding varnish hardens and becomes a stable, highly cross-linked duroplast with high viscosity and high bonding strength between the laminations.

Application Of Self Bonding Stator&Rotor Lamination Stacks

Motorneo self-adhesive iron core adopts the method of bonding the motor punching pieces together to form the iron core. At present, it is widely used in the fields of marine exploration, electric vehicles, aviation, rail transit and military aerospace.