Pascal mag clamp Magnetic mold clamp model MGA DATA SHEET www.pascaleng.co.jp Specifications are subject to change without prior notice. Pamphlet PA-110E REV.6 2007.09
Calculation of Fixing Force Calculation of Rated Fixing Force The fixing force of MAG clamp (the adhering force of magnetic clamp) varies according to the area size (number of magnet core) where the adaptor plate and clamp plate contact. When loading a small mold of which adaptor plate does not contact all the magnet cores, you are requested to work out the rated fixing force by referring to below example. EXAMPLEClamp Plate model MGA0100 (Movable side) 1. Magnet cores that the adaptor plate contacts with its entire area 4 pcs 2. Magnet cores that the adaptor plate contacts with 1/2 of its area 8 pcs Movable Platen Clamp Plate model MGA0100 Magnet Core 70 x 70 mm 3. Magnet cores that the adaptor plate contacts with 1/4 of its area 4 pcs 4. Total magnet cores that the adaptor plate contacts 4 pcs 8 pcs 12 4 pcs 14 9 pcs 5. Fixing force per magnet core 7.35 kn/pcs (refer to the table on the next page) 6. Rated fixing force 7.35 kn/pcs 9 pcs 66.15 kn REMARK (1) If there is a hole or notch at the bottom of adaptor plate, reduce the Adaptor Plate respective area from the total contact area (number of magnet core). (2) The actual fixing force may be lower than the rated capacity according to the conditions of adaptor plate. Refer to Decline of Fixing Force at below. Prior to the actual operation, be sure to read the operation manual for further details Decline of Fixing Force According to the conditions of adaptor plate for the mold, the actual force may become lower than the rating. Before using MAG clamp, be certain to calculate and acknowledge the decline of fixing force according to the below tables and charts. And be sure to use in the strict condition that the actual fixing force is larger than the mold opening force of injection molding machine. Actual Fixing Force=Rated Fixing Force - Reduced ForceMold Opening Force of Injection Molding Machine If the actual fixing force is calculated as short, replace the adaptor plate with the larger one to enlarge the contact area. Material of Adaptor Plate Surface of Adaptor Plate Distance between two plates Temperature of Adaptor Plate Material Fixing Force SS400 100% S55C Rated S45C-H S45C 95% SK3 SUJ 85% SUS430 FCD250 80% FCD600 SKH51 SKD11 70% As shown above, type of material of adaptor plate significantly affects the fixing force. Surface Roughness Rz1.6~3.8 Rz7.5~15.5 Rz85~150 Fixing Force 100% Rated Approx. 100% Approx. 90% As shown above, surface roughness of adaptor plate decrease the fixing force. Fixing Force % 100 50 0 0 0.5 Distance mm 1.0 A dent or deformation of the adaptor plate creates a distance to the clamp plate, which will decrease the fixing capacity significantly. Fixing Force % 100 50 Standard Type Heat Proof Type 0 0 50 100 Surface Temperature of Clamp Plate 150 If the temperature of adaptor plate becomes too high, the fixing force significantly decreases. Be sure to use by keeping the temperature below 80. (For details, refer to instruction manual) 1
Model and Specifications Clamp Plate Model Clamp Force of Injection Molding Machine Fixing Force 1 Movable Side Stationary Side Thickness of Clamp Plate Mass of Clamp Plate Movable Side Stationary Side Voltage Capacity 2 Time Required for Energization 3 kn kn kn mm kg kg kva sec. MGA0020S 200 22 22 32 32 15 0.5 MGA0030S 300 ~ 350 34 29 39 38 15 0.5 MGA0050S 400 ~ 550 41 39 50 50 30 0.5 MGA0055S 400 ~ 550 41 39 49 48 30 0.5 MGA0060S 600 41 39 34 45 44 30 0.5 MGA0080S 750 ~ 800 55 69 61 60 40 0.5 MGA0100S 1000 ~ 1100 78 78 83 82 40 0.5 MGA0130S 1200 ~ 1300 110 103 96 95 40 0.5 MGA0150S 1400 ~ 1500 123 118 123 120 40 0.5 MGA0050 500 ~ 600 59 59 72 69 15 0.5 MGA0080 750 ~ 850 88 88 91 88 15 0.5 MGA0100 1000 ~ 1200 118 88 122 119 30 0.5 MGA0130 1300 118 118 140 138 30 0.5 MGA0140 1300 133 118 138 138 30 0.5 MGA0150 1400 ~ 1600 147 147 177 179 30 0.5 MGA0160 1400 ~ 1600 192 147 50 189 190 30 0.5 MGA0180 1700 ~ 1800 176 176 201 197 30 0.5 MGA0190 1700 ~ 1800 192 176 201 201 30 0.5 MGA0230 2200 ~ 2300 221 206 236 238 40 0.5 MGA0250 2500 ~ 2600 251 235 269 270 40 0.5 MGA0280 2800 ~ 3000 251 265 292 294 40 0.5 MGA0350 3500 ~ 3600 310 314 350 361 40 1.5 MGA0450 4500 398 408 473 478 40 1.5 MGA0550 5500 427 439 535 540 40 1.5 MGA0650 6500 545 533 654 669 45 1.5 MGA0850 8500 633 690 823 839 45 2.0 MGA1050 10000 ~ 10500 809 815 1036 1049 45 2.0 52 MGA1300 13000 927 1004 1155 1177 45 3.0 MGA1600 14000 ~ 16000 1176 1160 1434 1428 80 2.0 MGA2000 18000 ~ 20000 1264 1317 1964 1958 80 2.0 MGA2500 22000 ~ 25000 1558 1505 1964 1958 100 3.0 MGA3000 28000 ~ 30000 1793 1788 2262 2260 100 4.5 1Total fixing force per clamp plate with the condition that the adaptor plate is contacting all the magnet cores. 2At AC200VAC220V of primary power source. In case of AC380V, AC440V or AC480V, refer to the specification check sheet. 3Time required to clamp or unclamp the mold for each side of clamp plate. Double energization for stationary and movable side can not be done at the same time. Time required subject to vary according to voltage. In case of AC380V, AC440V or AC480V, refer to the specification check sheet. Fixing Force Per Magnet Core Size of Magnet Core 50 x 50 mm 32 x 100 mm 70 x 70 mm 75 x 75 mm 100 x 100 mm 115 x 115 mm Fixing Force (Approx.) 2.45 kn 3.43 kn 7.35 kn 7.84 kn 7.84 kn 15.68 kn As to the size and number of the magnet core used for each clamp plate model, refer to the following clamp plate drawings. 2
! Caution in Use MAG Clamp generates a powerful magnetism. The person who is wearing a cardiac pacemaker is strictly prohibited to approach. Projecting height of magnetic flux above the clamp plate towards forward (to mold side) is just around 20 mm. However, be sure not to bring mobile phone, magnetic card or compact disc, etc. that are susceptible to magnetism close to the clamp plate to avoid a damage. Be sure to carry out a mold change work always under the condition that the mold is lifted with crane. Do not bring any magnetic substance such as ferrous metal close to the adherence surface when MAG clamp is magnetized (at clamping). Due to the power of magnet, it may be adhered to the clamp surface to cause injury to a finger or hand. The fixing force of MAG clamp (the adhering force of magnetic clamp) varies according to the area size (number of magnet core) where the adaptor plate and clamp plate contact. And the actual fixing force may be lower than the rated capacity according to the conditions of adaptor plate. Refer to Decline of Fixing Force separately shown for the details. Do not use a mold that is dented or deformed. If there is a gap between the adaptor plate and clamp plate, fixing force will decrease. Be sure to use MAG clamp by keeping the adherence surfaces of adaptor plate and clamp plate always clean. Water or oil would not cause a decrease of fixing capacity. However they will attract dusts or foreign substances, which may create a gap between the adaptor plate and clamp plate. Proof temperature of standard MAG clamp is up to 80. Do not use a mold of which contact surface becomes higher than that. If the mold becomes heated, cool it down immediately. Note that once the surface temperature of clamp plate exceeds120, the fixing force will no longer be assured even at the normal temperature. Be sure to use an adaptor plate of which thickness is 25 mm or more. Although the projecting height of magnetic flux is around 20 mm, the following cautions should be considered when a adaptor plate is thinner than 25 mm. 1 The fixing force may become decreased. 2 The sensor which is easy to be influenced by magnetism has a possibility of malfunction. 3 In case a moving parts is located within 25 mm above the mold displacement detection core, it may cause a malfunction of the mold displacement detection sensor. In the case of a mold which pushes out the molded parts with ejector pin, be sure to confirm that the length and hole position, etc. of ejector pin are correct. If wrong, the mold may be pushed out by ejector pin to fall. MAG clamp duly holds the mold even when the mold is declined. Set the mold with care so that the ejector pin and pin hole position are well-aligned. For the confirmation of alignment, lift the mold and push and pull the ejector pin to check the smooth action. Ejector Pin Clamp Plate Movable Platen Ejector Pin Hole Clamp Plate Adaptor Plate Ejection Force Mold Misalignment of Pin Hole Fall 3
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