new compounding options strengthen pull of molded magnets.
Adhesive magnets impose greater appeal on designers of motors, valves, sensors and other electronic devices used in automobiles, telecom equipment and large electrical appliances.
In applications that require greater design freedom than conventional magnets that are fired with 100% metal powder, this attraction is strongest.
Edward Halahan, polymer product manager, said: \" manufacturers are increasingly interested in injection-molded compounds --\"
Bonded magnetic compounds (PBMCs)
Timona at the UN summitJ.
PBMCs contains high-load magnetic powder (
About 60% in volume and 90% in weight)
Dispersed in the polymer matrix.
Hallahan says injection-molded magnets are becoming more popular because more complex shapes can be obtained without expensive processing steps.
In addition, the sintering (
And thermoforming PBMCs for compression molding)
Damage and debris are said to be easier.
David Jarvis, EMS marketing managerChemie (North America)Inc. , Sumter, S. C.
Estimated growth rate of PB magnets in the United States is 10%/yearS. and 15-
20%/year in Europe.
He linked the growing demand for electronic products.
He also mentioned the product side.
The use of an environment that poses a greater challenge in terms of thermal and chemical aggression.
For decades, thermoplastic PB magnets have been manufactured by professional manufacturers, far beyond the mainstream of plastic processing.
New PBM applications such as air in the 1990 s
Bag sensors and CD/DVD spindle drives are developed by top manufacturers such as Arnold Group at Ill Marengo. ;
Kane magnetic International, Loveland, Ohio, and Solihull, England;
And Tengam in Oswego.
These companies have developed their expertise in the compounding and molding of magnets, and they keep secrets near vests.
Most people are-
House but also use some Japanese-made compounds.
Japan International, for example, supplies U of PBMCs. S.
Through its subsidiaries in Fort LeeJ.
Now the time is ripe for a custom composite machine and a molder to open the world of PB magnets.
On the one hand, more designers are open to the advantages of PBMCs.
In addition, QEMs and level 1 molder are looking for new ways to develop their Electronicshow. In-
The PB forming of the house is an opportunity.
Less performance tradeoff the fatal weakness of thermoplastic PB magnets is that they cannot be equal to the magnetic force of conventional magnets.
This applies to \"hard \"(permanent)
A whose strength is multiplied by the maximum energy (BH max)in kJ/[m. sup. 3]
For \"soft\" magnets (
Magnetized in response to a magnetic field)
By penetration rate (kJ/[m. sup. 3]).
The strength of the PB is limited, because the key determinant of the magnetic force is the volume content of the magnetic material.
The Sintering metal is 100% and the hot solid is 98%. Adhesive (
2% epoxy adhesive usually).
In contrast, the upper volume limit of the thermoplastic is 60%, and its effectiveness is also reduced accordingly.
Gerhardt Reuschel, Ticon PB expert, believes that ticon\'s products are viable when other benefits exceed the deficit.
He noted that PBMCs has a higher mechanical load
The bearing performance is superior to other magnets, as can be seen from the bending strength of the ticon grade, which is at least twice that of the sintering .
PBMCs also allows the design of complex shapes and magnetic fields into magnets.
In addition, the thermoplastic PB magnets have improved in both magnetic and mechanical properties.
Nd-is now being used by some suppliers-iron-
A new rare element, boron.
Earth magnetic powder. Nd-Fe-
B alloys have greater magnetic properties than conventional ferrites.
It helps unlock new characters for PB magnets in DVD disk drives and car use.
However, it is also more difficult to composite compared with traditional ferrite magnetic powder, with lower corrosion resistance and higher cost.
Ticon has just launched a Fortron PPS magnetic compound family, which is said to offer better chemical and temperature resistance than existing PBMCs, most of which are based on nylon 6, 66 and 12.
Another claimed advantage is superior dimensional stability.
Ticon believes that these properties are becoming more and more important given the way magnets are used (e. g. , in high-speed rotation)and assembled (
High welding temperature). Ticona\'s PPS-
The base compounds include hard magnetic grade and soft magnetic grade.
At present, although ticon is exploring the use of Nd-Fe-B.
The soft grade of Tikona has a specific proportion of 2. 8 to 3.
6 and penetration rate 2. 2 to 15 kJ/[m. sup. 3].
They are customized for specific roles such as Toner sensors in copiers, photocopiers in mobile phones, and inductor housing in LCD lighting.
Reuschel believes that the ability of soft magnets to absorb, suppress, deflate or shield the solenoid valves around them is the main driving force for growth.
The Ticon hard grade includes some grades for the same-sex magnets (
Where the particles are randomly arranged)
And other heterosexual magnets.
In the latter case, when the compound is still in a semi-molar state, the magnetic particles must \"freeze\" in the desired direction \".
Special magnetized molds and filling fixtures are required to make them.
Ticon hard class applications are speed and rotation sensors in the car, flow
The position sensor in the control valve and disk drive in the air conditioner.
The price of Fortran magnetic compounds is $10 to $15 per pound.
* 85 * ticon officials say soft and permanent homophobic magnets can be formed on traditional injection molding machines.
However, to prevent wear and tear, hard ferrite particles require the mold to be made of hardened steel.
For screws and barrels and micro hardened steel
Tungsten steel for Gates. EMS-
Chemical methods on the slab of peripheral blood flow in Central Europe1990s.
Its original product was based on Grilamid nylon 12 and the use of traditional ferrite body powder.
Now, the Grilamid family of the LPs also uses the Nd-Fe-
B. Within the range of metal content weighing 78% to 92% (
Volume 50% to 65%).
The maximum value of hard magnetic grade BH is 15 ~ Within 50 kJ/[m. sup. 3].
Meet demanding terminal requirementsuses, EMS-
Chemie is now launching a high-based
Temperature, part of aromatic nylon sold under the name of Grivory HT merchandise.
Some Grivory compounds use standard ferrites, but others contain Nd-Fe-
B magnetic packing.
Three products weighing 88%Fe-
B is provided in the short termand long-term high-
Temperature exposure, and electricity-motor (high-coercivity)markets.
Jarvis of EMS thinks nylon-
Performance advantage based on PBMCs compared to PPS version--
One is the magnetic filler that they accept higher loads, which gives a higher magnetic strength.
In addition, nylon is 10-
The density is 20% lower than PPS, which means the cost of forming parts per cubic inch is lower. EMS-
Chemie also says the Grivory level using NdFe-
B has advantages over equivalent compounds made of PPS.
These include higher impact strength and limit elongation, as well as a slightly higher HDT.
Another high welfare
The recyclability of hot nylon products is better.
Because the price of this alloy is at least $40/lb, the use of B, which is a premium for waste reuse.
EMS data show that the Grivory grade is still more resilient, stronger, and tougher than PPS compounds in varying degrees of reuse.
The new thermoplastic material technology has the potential to produce more powerful PB magnets.
The reactive thermoplastic system being developed by dynamicsRensler, N. Y.
, Recycling of low molecular weight and waterlike viscosity.
Their low viscosity allows the addition of metal fillers and reinforcement materials at a weight of up to 80%.
Once injected into the mold, the catalyst causes the oligomer to aggregate into a polymermolecular-
Weight works on thermoplastic plastics such as polycarbonate or polyester.
The company reports that customers are interested in using the axiics to form magnets related to their superiorsvoltage (42-V)
Batteries are being tested for automotive electronics.
More PBM players are involved in RTP Co. , Winona, Minn.
, And LNP engineering plastics for Pa Exton. , supply soft-
Both companies are experts in high-fill formula.
Not surprisingly, they expect to increase their role in the market in the near future.
Bulk forming compounds
In Chicago, hot sleeves are provided for the compression molding of magnets.
It is said that its BMC 750 series of compounds can produce magnets that do not require a supportive plastic coating.
Magnetic quenching of Ind Anderson
, The only domestic supplier of Nd-Fe-
Magnetic powder also makes Ne-Fe-
B. Sintering .
Recently, the company acquired a top PB in Essen, Germany-Widia engineering.
Since then, magnequbench has introduced the MQ3 series molded magnets, in which magnetic particles are aligned in the direction of the flow to create a powerful heterosexual permanent .
Meanwhile, on May 8, two lawsuits were filed in the United States by magnequbench. S.
Against 10 large electronic and computer manufacturers, the Nd-Fe-
The plastic magnets used in their products violate magnequbench\'s patent in the application of alloy magnets. (
The source pointed out that the problem involves Chinese people.
Magnets made using NdFe-
B alloy from China without permission from magnequbench. )
Another PB manufacturer, Kane , compound and mold Ne-Fe-
B. The is as small as 0. 5 g.
AKane, an anchor subsidiary in Sheffield, UK, recently launched a simple-to-
Handling powerful signage suspension system Mag-Edge.
This took advantage of Ne-Fe-
B. Achieve high adhesive strength in 3mm wide plastic strips and 0. 7 mm thick.
The magnetic compound is extruded with the supporting plastic layer.
Stephen Bullen, director of marketing at Kane group, noted that Kane recently acquired the C2B in Auxonne, France.
The company is a leader in sintering magnets and has developed a way to protect the skin from overforming with plastic.
The Arnold compound and mold plastic are made into HS magnets with nylon and PPS. It uses rare-
Nd-rare earth alloyFe-B and samarium-cobalt.
Nowadays, it is very common for us to utilise in Ferrite Magnet. And the quality of is decisive to production efficiency.
You can find a large selection of quality at Maghard Flexible Magnet. Go get your desired one.
Obviously, financial return is important in manufacturing custom magnets, but I think that's not enough. I think many customers want to support something they really believe in.
Maghard focuses on three key elements—process, people, and technology—the authors found that people of two seemingly opposite cultures are able to work together in a project-based environment to complement each other and reap mutual benefits for a win-win result.