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Magnetic clamping technology

Magnetic clamping systems

Magnetic clamping plates for different sectors of industry as e.g. for thermoplastics, elastomers, duroplastics, polyurethane, pressure die casting and metal forming.

The magnetic clamping systems or clamping plates have been especially designed for injection moulding machines, rubber presses, die casting machines, mould carrier and presses for metal forming.

All non-standard die moulds can be replaced quickly and easily without making any changes, because the standardization of dies.

The product range "M-TECS" stands for magnetic clamping technology, that means clamping technology of the highest level and offers the following key advantages for the user:

• standardisation of dies is not required
• height of clamping edge and die shape are not of importance
• low downtimes, lower setup costs
• increased productivity
• clamping in barely accessible positions without any problems
• no reduced clamping surfaces
• process monitoring and thus absolute safety
• clamping force on the complete surface and clamping with minimum deformation
• reduced maintenance costs

Series Data sheet Technical data
M-TECS 130-K
M-TECS 130-K
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M-TECS 130-K

 

for the plastics industry,

usable up to 130°C

max. working temperature: 130°C
specific magnetic force: 18 kg/cm² (directly at the pole)
effective magnetic force: max 5-12 kg/cm²
magnetic penetration depth: 15-20mm
plate thickness: 47mm
mounting: as per EUROMAP grid
interface: as per EUROMAP 70.0 or 70.1 .

mounting and interface also possible upon customer's request
option: with insulation plates behind the magnetic plates

M-TECS 240-G
M-TECS 240-G
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M-TECS 240-G

 

for the rubber and Duroplast industry,

usable up to 240 °C

max. working temperature: 240°C
specific magnetic force: 18 kg/cm² (directly at the pole)
effective magnetic force: max 5-12 kg/cm²
magnetic penetration depth: 15-20mm
plate thickness: 55mm, without heating
plate thickness: 75mm, with heating
mounting: as per customer's request
interface: customer-specific or as per Euromap 70.0 / 70.1

suitable for horizontal and vertical machines
available with and without integrated heating.
insulation plates behind the heating magnetic plates

M-TECS 240-D
M-TECS 240-D
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M-TECS 240-D

 

for die casting machines,

usable up to 240 °C

max. working temperature: 240°C
specific magnetic force: 18 kg/cm² (directly at the pole)
effective magnetic force: max 5-12 kg/cm²
magnetic penetration depth: 15-20mm
plate thickness: 55mm

mounting: as per customer's request
interface: customer-specific or as per Euromap 70.0 / 70.1

M-TECS 80-B
M-TECS 80-B
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M-TECS 80-B

 

for sheet metal forming

usable up to 80°C

max. working temperature: 80°C
pole 50 mm: 350 daN / pole
pole 70 mm: 750 daN / pole
plate thickness: 55mm, pole 50x50mm
plate thickness: 67mm, pole 70x70mm
magnetic penetration depth: 15-20mm
mounting: as per customer's request
interface: as per customer's request

M-TECS 80-F
M-TECS 80-F
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M-TECS 80-F

 

for mould carrier systems,

usable up to 80°C

max. working temperature: 80°C
specific magnetic force: 18 kg/cm² (directly at the pole)
effective magnetic force: max 5-12 kg/cm²
magnetic penetration depth: 15-20mm
plate thickness: 47mm
mounting: as per customer's request
interface: as per EUROMAP 70.0 or 70.1 .

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figure 1: M-TECS function principle for vertical design
 
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figure 2: M-TECS function principle for horizontal design
 

Functional principle and interface of the magnetic clamping system :

The technology of the magnetic clamping plates is based on the principle of an electro-permanent magnet and is thus safe, even in case of a pressure failure. Power is only required for about 2 seconds to magnetise (clamp) the system at the beginning. In operation, the system works independently of any power supply. Only to unclamp the die, electrical energy is required again.
The magnetic force is generated in a very flat, highly concentrated magnetic field. This penetrates only a few millimetres into the die base plate and will therefore have no impact on the die and the products.
The achievable magnetic forces are between 2- 5 kg/cm², depend on the surface and increase with the size of the die. Clamping forces of e.g. 500, 1000 or 4000 kN are possible. The forces can be adapted upwards and downwards to the needs of the machine. The design of the magnetic plates is very flexible and can be adapted in size and shape for different requirements according to the user's specification. The plate thicknesses are between 47- 75 mm.
Additional holes for ejector, centring rings / positioning pins as well as pass-through holes for pieces punched out during metal forming can be easily integrated in the magnetic plates. There are no limits set to the geometric shape of the magnetic plates. The system is suitable for temperatures up to 240° C on request and can even resist to heavy contamination, release agents and vacuum. A permanent monitoring of the clamping condition, the temperature, and the position of the die by a supplied, separate control offers the maximum possible safety for automated processes.

The system itself does not have any movable elements and is practically maintenance-free. It is suitable for fitting or retrofitting without any problems in nearly all presses. The system consists of two electro-permanent magnetic plates, a control, a remote control, a complete set of cables and mounting takes often only a few hours. The interface to the machine is as per EUROMAP or according to customer's specification.

 
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figure 6: M-TECS 240 G: Rubber moulding press
 
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figure 3: M-TECS 80-F for mould carrier systems, usable up to 80°C
 
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figure 3: M-TECS 240-G for the rubber and Duroplast industry, usable up to 240 °C
 

Safety of the magnetic clamping system:

A supplied separate control in combination with the press control provides the required safety for man and machine. During the whole machining process, the control continuously monitors the parameters of the magnetic force, the position of the die (die contact) and the temperature. With the smallest movement of a die half, the machine will be stopped guaranteed safety for man and machine.

An indicator light on the remote control continuously shows the state of the system. The magnetic clamping system is CE tested and complies with the necessary machine directive 98/37/EEC, low voltage directive 73/23 EEC, EMC 89/336.
In addition, all requirements of EN201 for injection moulding machines and EN 289 for presses are met.
All of the desired performance levels can be met.
TÜV inspections at the end customer and with press manufacturers confirm safe handling and use with the ROEMHELD magnetic clamping systems.


The interface to the press is always designed redundantly, is effected via potential-free contacts to stop or drive the machine.
Defined in the standard of EUROMAP 70.1 or 70.0, but also customer-specific solutions can be easily realised.

The system M-TECS complies with the following machine directives: 98/37 EEC; 73/23 EEC; EMC 89/336; CE sign

 
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figure 1: M-TECS 240-D for die casting machines, usable up to 240°C
 
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figure 2: M-TECS 80-B for sheet metal forming usable up to 80°C
 
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figure 3: M-TECS 80-F for mould carrier systems, usable up to 80°C
 
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figure 4: M-TECS 40-F for milling machining, usable up to 40°C


 
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figure 5: M-TECS 130-K
 
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figure 6: M-TECS 240 G: Rubber moulding press
 
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figure 7: M-TECS 240 G, Rubber moulding press with roller bars
 
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figure 8: M-TECS 130 K, Magnetic clamping plate for injection moulding machine
 
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figure 9: M-TECS 130 K, Magnetic clamping plate for injection moulding machine
 
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figure 10: M-TECS 130 K, Magnetich clamping system for Arburg machine
 
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figure 11: M-TECS 130 K, Magnetic clamping system for 1600 to machine
 
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figure 12: M-TECS 130 K for a 110 to Ferromatik
 
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figure 13: Magnetic clamping system for a KM 1700
 
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figure 14: Rotary table with magnetic plate
 

Figure 1
Magnetic clamping system Type M-TECS die casting, especially designed for die casting machines
Temperature stable up to 230°C.
Suitable for horizontal and vertical machines.
Available with and without integrated heating.
Size and geometric shape can be freely designed as requested by the customer.

Figure 2
Quick die change on presses and automatic punching machines.
Die or mould change on punches and presses within a few minutes as well as further processing advantages are created with Hilma magnetic clamping systems.

 

 

Figure 3
Magnetic clamping systems especially designed for mould carrier machines.
Vertical arrangement with high safety requirements.
Control and signal exchange with requirements for high performance levels.

 

 

Figure 4
M-TECS square poles for extremely heavy machining
Each magnetic plate can be individually adapted to the particular machine table. Exact positioning on the machine table is ensured using 20H7 longitudinal and crosswise slots. The fixation is made in an all around clamping groove by means of clamping claws. Combinations with Hilma machine vices or Stark zero point clamping systems can be easily realised, as they all come from a single supplier. Additional T-slots, mounting holes, stops and special dimensions are not a problem to us.

Figure 5
M-TECS magnetic clamping system for a 100to Arburg 420 injection moulding machine.
Temperature range up to 130°C (on request up to 240°C).
Magnetic holding force = 100 kN

Figure 6
Magnetic clamping system in a rubber moulding press of the company Wickert
Plate size 500x500mm, magnetic force up to 120 kN possible.
Clamping and unclamping of several dies at the same time within a second. Temperature range up to 240°C.
The mould halves are heated by the magnetic heating plate.

Figure 7
Magnetic clamping system in a rubber moulding press of the company PanStone
Plate size 700x700mm, magnetic force100 kN realised for small and medium mould weights.
Temperature range up to 240°. The mould halves are heated by the magnetic heating plate.
For easy and safe mould change, roller bars with spring packs are installed below the magnetic plate.

 

 

Figure 8
Magnet clamping system for an injection moulding machine of the company Engel
Closure force: 1700 to; Magnetic force: 140 to
Max. mould weight: 26 to
Plate size: 2400X2100x55mm
Version with square poles and long poles
On request with force sensor control.

Figure 9
Long pole technology in a 2400 to injection moulding machine
Closure force: 2400 to; Magnetic force: 180 to
Max. mould weight: 30 to
Plate size: 2800x2500x55mm
Version with long poles

Figure 10
Magnetic clamping system installed in Arburg 520C
High concentration effect of the magnetic force close to the centring ring.
Also very small moulds are safely clamped.

 

 

Figure 11
Magnetic clamping systems for an injection moulding machine of the company Krauss Maffei

Closure force: 1600 to; Magnetic force: 130 to
Version with long poles
Clamping force on the complete plate surface

Figure 12
Magnet clamping system for an injection moulding machine of the company Ferromatic

Closure force: 110 to; Magnetic force: 8 to
Clamped is a very small mould.
High force density due to long-pole concentration effect.

Figure 13
Magnetic clamping systems for a Krauss Maffei injection moulding machine
Closure force: 1600 to; Magnetic force: 130 to
Version with long poles.
Clamping force on the complete plate surface

 

 

Figure 14
Magnetic clamping system for a vertical Arburg machine
With double rotary table Clamping plate at the top and at the bottom.