Injection Molded Magnets

Chongqing Great Wall Technology Co., Ltd

Great Wall Technology is a high-tech combo enterprise which integrates R&D, production, marketing of Ferrite magnet, NdFeB magnet, Alnico magnet, SmCo magnet, SmFeN magnet, as well as Magnetic assembly, etc.

Our Highlights
Magnetic solutions simulation, Mechanical engineering adjustment, Pilot and volume production optimization, Prototyping suggestion.

Ur Product
GWT focus on making magnetic assemblies (magnetic coupling, magnetic rotor and stator, high-precision rotor assembly etc).

Our Service
We are striving to continuously improve the magnetic quality, response rate and competitiveness.

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Injection Molding Magnets

Injection molding magnets are magnets that are produced by injection molding, a manufacturing

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Injection Molded Magnets Parts

A variety of ferrite powders, nylon 6, nylon 12, polypropylene, and other resins can be combined to

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Injection Molding Magnets

Injection molding requires a magnetic substance and a solid binder (such as plastic or

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Injection Molded Neodymium Magnets

Injection molded Neodymium-Iron-Boron are magnets made with a mix between plastic polyamide and

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Injection Molded Ferrite Magnets

Injection molded ferrite magnets are made of a compound of ferrite powder and Nylon. To increase

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Plastic Injection Molded Magnets

Injection molded magnet is one of the more important developments in magnetic materials, it has

Injection Magnets - Magnetic Characteristics

Grade Properties	Remanence	Coercivity	Intrinsic Coercivity	Max. Energy Product BH(max) KJ/m3(MGOe)	Density	Relative Recoil	Temperature Coefficient	Max. Operating
	Br	Hcb	Hcj		g/cm3	Permeability	of Remanence	Temperature Tw
	T(GS)	KA/m(KOe)	KA/m(Koe)			µr	αBr	℃
							%/℃
BNI-3	0.2~0.4	120~240	480~640	8~24	3.9~4.4	1.2	-0.15	100
		(1.5~3.0)	(6.0~8.0)	(1.0~3.0)
BNI-4	0.40~0.46	250~335	575~735	28~36	4.2~4.9	1.2	-0.13	110
		(3.1~4.2)	(7.2~9.2)	(3.5~4.5)
BNI-5	0.45~0.51	280~360	640~800	37~44	4.5~5.0	1.2	-0.13	120
		(3.5~4.5)	(8~10)	(4.6~5.5)
BNI-6	0.51~0.56	295~375	640~800	44~52	4.7~5.1	1.13	-0.11	120
		(3.7~4.7)	(8~10)	(5.5~6.5)
BNI-6H	0.48~0.56	335~400	1035~1355	40~52	4.8~5.2	1.13	-0.15	130
		(4.2~5.0)	(13~17)	(5.0~6.5)
BNI-7	0.54~0.64	320~400	640~800	51~59	5.0~5.5	1.13	-0.11	120
		(4.0~5.0)	(8~10)	(6.5~7.5)
BNI-5SR (PPS)	0.45~0.50	300~360	875~1115	36~44	4.9~5.4	1.13	-0.13	150
		(3.8~4.5)	(11~14)	(4.5~5.5)

Components of Injection Molded Magnets

Two primary components are used in creating bonded magnets:

Magnetic Powder

This typically consists of ferrite and NdFeB (neodymium-iron-boron) powders. These materials provide the essential magnetic properties required for the final product.

Non-Magnetic Binder

A polymer or elastomer binder is used to hold the magnetic powder together. This binder is critical in forming a durable, flexible compound that can be easily molded.

Advantages of Injection Molded Magnets

1. The appearance is smooth and flawless, with high dimensional accuracy, good consistency, and no need for subsequent processing. They offer stable performance, shock resistance, and impact resistance. The main function of the magnetic ring on the walking wheel of the sweeping robot is to control the motor speed and steering.

2. Overmolding and insert molding with other parts (e.g., back yokes, hubs, axles) is readily available, and injection-molded polymer parts can also be incorporated.

3. Injection-molded magnets have a higher volume fraction of polyester binder than compression-molded magnets. In most applications, they provide adequate corrosion protection without the need for a coating.

Applications of Injection Molded Magnets

Motors and Drive Systems: Injection molded magnets find extensive use in various motors, including Brushless DC Motors (BLDC), Permanent Magnet DC Motors (PMDC), stepper motors, and synchronous motors. These motors are widely utilized in automotive, industrial automation, and consumer electronics.

Automotive Applications: In the automotive industry, injection molded magnets are used in various sensors and actuators, including speed and position sensors, flow meters, torque motors, magnetic couplings, HVAC motors, rollover sensors, water pumps, feedback sensors, water meters, exhaust gas recirculation (EGR) sensors, throttle position sensors, turbo actuator sensors, cylinder sensors, and timing magnets. These components are crucial for enhancing the performance and safety of automobiles.

Medical and Diagnostic Equipment: Injection molding technology is employed in producing critical magnetic components for medical devices, particularly in imaging and diagnostic equipment such as Magnetic Resonance Imaging (MRI) machines, where highly precise magnetic elements are essential for device performance.

Electronics and Instrumentation: Injection molded magnets are used in manufacturing micro-magnetic components for electronic products and instrument panels, such as flow meters, level sensors, and fuel filters. These components play a crucial role in precise measurement and control systems, while also driving the miniaturization and high performance of equipment.

Aerospace: In the aerospace sector, injection molded magnets enhance the complexity and reliability of navigation, communication, and propulsion systems, ensuring continuous operation of equipment in extreme environments, thereby enhancing overall safety and efficiency.

Office Automation Equipment: Injection molded magnets are also employed in office automation equipment, such as rotors in copiers, aiding in improving operational efficiency and reliability of the equipment.

Molded Magnet Customization Process

1. Provide accurate molded magnet material.

2. Customers provide drawings or samples of molded magnets.

3. The company provides a quotation for the magnets (including proofing fee, proofing time, unit price, and delivery date).

4. The customer confirms the quotation, signs the purchase contract, and pays the advance payment.

5. Proofing of magnets is done strictly according to customer needs.

6. The customer confirms the sample, and once approved, the bulk production of goods will begin.

Physical Properties

Magnet Type	Grade	Br		Hcb		Hcj		(BH)_max		TW	Tensile streng	270°Cx5kg Mell Flow Rate	Density	Molding shrikage Coefficient	Urec	αBr
mT	(kGs)	kA/m	kOe	kA/m	kOe	kJ/m³	MGOe	°C	Mpa	G/10 min	g/cm³	%	-	%/°C
-	-	-	-	-	-	-	-	-	-	ASTMD-638	ASTMD-638	ASTMD-792	DIC Method	-
Injection Ferrite Magnets	Ferrite Powder +Binder Nylon6
	*IMF0606	185	-	127	-	231	-	6.4	-	≤140	-	-	-	-	-	-
	*IMF0606	220	-	171	-	278	-	9.6	-	≤140	50	200	3.05	0.6	-	-
	*IMF0606	250	-	191	-	223	-	12.4	-	≤140	60	120	3.4	0.6	-	-
	*IMF0606	260	-	195	-	255	-	13.6	-	≤140	50	100	3.45	0.6	-	-
	*IMF0606	275	-	199	-	247	-	14.4	-	≤140	55	130	3.5	0.6	-	-
	*IMF0606	280	-	203	-	238	-	15.6	-	≤140	54	130	3.6	0.5	-	-
	*IMF0606	290	-	207	-	250	-	16.8	-	≤140	60	110	3.65	0.5	-	-
	*IMF0606	295	-	211	-	263	-	17.6	-	≤140	50	100	3.7	0.4	-	-
	Ferrite Powder +Binder Nylon12
	IMF0212	115	-	79	-	203	-	2.4	-	≤120	40	200	2.9	0.7	-	-
	IMF1212	265	-	199	-	250	-	12.8	-	≤120	50	50	3.45	0.5	-	-
	IMF1512	280	-	195	-	250	-	15.2	-	≤120	40	-	3.6	0.5	-	-
	IMF1612	290	-	199	-	247	-	16.8	-	≤120	40	-	3.65	0.5	-	-
Hybrid magnet	Hybrid Power +Binder Nylon/PPS
	IMH13PPS	260	-	179	-	227	-	13.2	-	≤180(PPS)	40	40	3.55	0.4	-	-
	IMH34PPS	450	-	302	-	915	-	33.6	-	≤180(PPS)	-	-	4.65	-	-	-
Injection NdFeB Magnets	Injection NdFeB Magnets
	IMN-2	200-400	2.0-4.0	120-240	1.5-3.0	560-720	7.0-9.0	6.4-24	0.8-3.0	≤120	-	-	3.5-4.0	-	1.25	-0.15
	IMN-4	400-490	4.0-4.9	247-310	3.1-3.9	573-732	7.2-9.2	28-36	3.5-4.5	≤120	-	-	4.0-5.0	-	1.2	-0.1
	IMN-6	490-570	4.9-5.7	312-382	3.9-4.8	637-796	8.0-10.0	42-56	5.2-7.0	≤120	-	-	5.0-5.5	-	1.2	-0.1
	IMN-8	570-630	5.7-6.3	382-430	4.8-5.4	676-835	8.5-10.5	59-67	7.4-8.4	≤120	-	-	5.0-5.5	-	1.2	-0.1
	IMN-6H	480-560	4.8-5.6	334-398	4.2-5.0	1035-1353	13.0-17.0	40-52	5.0-6.5	≤120	-	-	5.0-5.5	-	1.13	-0.15
Injection SmCo Magnets	Injection SmCo Magnets
	SMB-6(1:5)	400	4	280	3.5	800	10	30~50	4~6	≤120	-	-	-	-	-	-
	SMB-10(1:5)	500	5	320	5	800	10	50~65	6~8	≤120	-	-	-	-	-	-
	SMB-10(2:17)	600	6	360	4.5	800	10	65~80	8~10	≤120	-	-	-	-	-	-
	SMB-12(2:17)	700	7	400	5	800	10	80~95	10~12	≤120	-	-	-	-

FAQ

Q: How long will you give me the reply?

A: We will contact you in 12 hours as soon as we can.

Q: Could I get samples?

A: Yes,we have materials in stock to help you to get the samples as soon as we can.

Q: How about the quality of the magnets?

A: We have the certification of ISO,TS and ROSH,we could send the certification test of our company to you.

Q: How is the price?

A: As we believe the quality is the most important,we will provide the best quality magnet we can with reasonable price.

Q: Could you provide me the shortest lead time?

A: We have materials in our stock,if you really need,you can tell us and we will try our best to satisfy you.

Q: Could I visit your factory?

A: Of course,if you need we will help you to visit our factory.

Q: If I have paid,when will you help me to produce?

A: When we have received the money in our account,we will give you the receipt and arrange to produce immediately.

Chongqing Great Wall Technology Co., Ltd. is well-known as one of the leading injection molded magnets manufacturers and suppliers in China. Please feel free to buy or wholesale high quality injection molded magnets made in China here from our factory. For customized service, contact us now.

Injection Molded Magnets,