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MEDIO CENTER

【Quick Die Change】Common Problems of Magnetic Formwork

2018-11-24
Can a large mold hold it?
The rare-earth permanent magnet material with high magnetic energy product, NdFeB, is used inside the magnetic template. As the latest result of the development of rare-earth permanent magnet materials, it is called "Magnetic King" due to its excellent magnetic properties. NdFeB magnetic material is neodymium, iron oxide is an alloy, also known as magnetic steel. NdFeB has extremely high energy product and coercivity. Magnetic template design The single-piece template can bear the weight of the entire set of molds. The weight of the large automobile bumper mold is generally 35~45 tons, and it can also be easily clamped on the magnetic template for use.

Will the power outage drop the mold?
The magnetic template is designed according to the principle of electronically controlled permanent magnet technology. Electric energy is only used when switching the magnetic circuit at the moment of excitation and demagnetization (only 1 to 3 seconds), and electricity is only used for system operation at other times.

How long does the magnetism last?
As we all know, the decay of the magnetic properties of magnets is a very long process, so the service life of the magnetic template can exceed thirty years or even longer.
Is magnetism harmful to the human body?
After the magnetic template is excited, there will be a magnetic field on the working surface, which is a permanent magnetic field rather than an electromagnetic field, and the harm to the normal human body is minimal. The radiation space of the magnetic field lines is also a limited range of tens of millimeters. Persons with built-in medical devices, such as medical devices, should consult a doctor. In addition, the magnetic template will generate suction for ferromagnetic materials, such as wolf heads, wrenches, watches, etc., and it is strictly forbidden to approach credit cards, ID cards, etc. to avoid demagnetization failure. Will the injection temperature be too high to cause suction attenuation?
The magnetic materials assembled into the magnetic template have undergone strict temperature-resistance testing, and the ex-factory products are divided into two grades: 120°C and 150°C. It can be applied to the production and use of plastic products.

Can the factory power supply be unstable?
The magnetic template only uses electric energy at the moment of excitation and demagnetization, and does not consume electricity at other times; the controller system is designed as an intelligent constant-current control output, which can be used normally even when the external power supply is unstable.

Need to modify the mold? Can a mold with a heat shield installed be used?
Install electric permanent magnet quick mold changing magnetic template, most molds can be used directly. For the asymmetric mold of the opposite sex, it is necessary to consult the manufacturer and evaluate it before using it. In addition, the magnetic formwork system cannot be used on molds with added thermal shields.
Generally, the material for making the mold heat insulation board is a non-ferromagnetic material with poor thermal conductivity, so it cannot be used directly. It is perfectly fine if the heat shield is installed between the magnetic formwork and the injection molding machine wall.

Are maintenance and use costs high?
Because the system only uses electric energy at the moment of excitation and demagnetization, the aging speed of each device is very slow, and there are no moving parts inside the product, so the magnetic template does not require frequent and cumbersome maintenance and repair, and the use cost is almost zero.