Magnetic Template

A: when the mold back plate uneven or cavity, the clamping force of magnetic system will decrease because contact area decrease. HQMC magnetic system in the design process are usually considered nearly 30% safety margin, it means that when the mold back plate cavity area does not exceed 20%, the magnetic system is safe. However, taking into account the actual operating conditions are always several factors affecting the attraction force of the magnetic platen, If the flatness of the mold back plate itself does not reach magnetic platen technical requirements of 0.2mm / M, If the flatness of the mold back plate itself does not reach magnetic platen technical requirements of 0.2mm / M, the back plate also have too much cavities, the mold will glide or fall due to lack of clamping force.
Solution way: strictly control the actual area of mold back plate in safety standard also of take care size of the flatness of the mold back plate.

A: If mold back plate temperature is too high, exceeding the allowed maximum operating temperature will lead to the magnetic clamping force decline in the mold base. There is a temperature detect senor setting on the HQMC magnetic plate, when temperature alarm activate, mold back plate need to be insulated to prevent suction force decreases.

A: When the magnetic platen is applied to the injection molding machine, its main purpose is to help customers to reduce changeover times improve equipment. Compare to traditional mechanical clamps for production efficiency, magnetic platen has made a lot of improvements on security. But as the above analysis, the size of the magnetic design cannot exceed the maximum clamping force of the injection molding machine. So here we need to remind all customers, when using a magnetic platen, the mold speed setting should be adjusted to a reasonable extent in the first paragraph to avoid the high-speed mold. Too fast, it will cause the vacuum in a mold cavity cannot be added in a short time, so that the mold will be pulled down from the magnetic platen by vacuum force.
Solution: control the speed of the frst paragraph of mold within a reasonable range. Since V=1/2 〖at〗^2,mv=F,so F=1/2 atm
(V: mold speed, a: acceleration, t: mold time, m: weight of the mold, F: Opening Force) mold speed, It means big acceleration, when the maximum value of the maximum F exceeds the magnetic attraction force of the platen, there will be pulled off the phenomenon, of course, at this time the magnetic platen alarm unit will immediately display alarm and stop operation of the device.

A: If the down time is too long after high-pressure clamping, related metal structure leads to an elastic deformation of the mold cannot mold, or because of the mold itself defect cannot mold. At this moment, force open the mold, the injection mold opening force will be larger than the magnetic clamping force, mold will slide or fall, quick change system will send alarm and emergency signal letting machine shut down. So, When a similar situation occurs, Safety protection measures for mold must be well done to prevent mold drop (use safety chain, etc.) At the same time, for the mold which cannot mold, we need to make timely repairs to prevent similar accidents.