UNI ISO 6020/2 Compact is one of the most diffused standards for hydraulic tie rod cylinders, and cylinders following this norm are produced by every imaginable manufacturer. What makes our V215 stand out from the rest?
It all begins with the materials we use. The rod, for example, is of chromium-plated and polished alloy steel, to allow a longer durability of the ring seals. The tube has a specular finish on the inside to reduce roughness and give even less resistance to the motion of the piston; it is made of austenitic stainless steel for the magnetic version. Then, of course, there’s the passion we put in manufacturing our products. They are assembled by hand by highly specialized personnel, using components measured against strict tolerances, and tested one by one, no exception, before leaving our factory.
But of course that’s just a small part of what makes it special.
Another crucial difference between the V215 and the rest is the number and quality of ring seals used. For comparison, on the cartridge at the top of the cylinder, while most competitors use one wiper and one ring seal, the V215 typically has:
- One wiper seal made of PTFE and carbo-graphite, backed up by an O-ring in FKM, which helps with the sealing while pushing, and clears the rod while pulling;
- Two ring seals made of PTFE and carbo-graphite, backed up by O-rings in FKM, offering optimal sealing between the upper oil chamber and the outside;
- Three wear rings in polyester, giving a tight guide to the rod and avoiding wear on the cartridge; in addition, auto-lubricant properties of the polyester help ease the movement of the rod.
All these seals are standard in our cylinder. To sum it up, the V215 will give you much less leakage of oil in the mold, and once the seals wear out, all you need to do is replace them and put your cylinder right back to work for the many years to come.
There are cases where the workload of the mold is so high that the machine needs to reach high speeds to keep up with it. In turn, all cylinders need to move very quickly, but the high energy reached can cause the piston to hit the back and front so hard that it will simply break. This is where cushioning comes to play.
The cushioning system works by forcing oil to pass in a smaller passage before getting to the port, therefore increasing pressure inside the chamber, and slowing down the piston at the very end of the stroke. This way, the V215 can withstand speeds up to 0.8 m/s without risks of failure due to the high impact energy, since the piston decelerates softly.
Of course, we made sure the system is very easy to set up; all you need to do to regulate how much cushioning you want is close or open a little screw at either end of the cylinder and then lock it in place with a security nut we provide.
Practically all injection moulding machines employ electronic controls nowadays, to know on which phase of the injection process they are. And many engineers decide to directly control the position of the cylinders as well. This is possible thanks to magnetic sensors located on the body of the cylinder.
Vega knows this very well, being the first company to introduce the use of magnetic switches on hydraulic cylinders, back in 1987. We’ve come a long way since then, and of course this is a core aspect of our V215. Our sensors are still magnetic, which is the most logical solution on such a product, and they are set to perceive the field generated by a rare earth magnet inside the piston. What changes is the technology; they protrude only 9 mm x 11.5 mm in the worst case, causing even less bulk outside the shape of the cylinder. And of course, they work with our SIM 08 connection box.
Of course, our staple is still the MSU1 sensor. While a little bulkier, it offers stunning durability and efficiency. And to keep improving it, we designed a brand new bracket.
What’s changed? First of all, the shape. It is completely different from the one we used a few years ago, offering a much larger contact surface between the bracket and the tie rod. This means that it’ll get an even tighter grip on the cylinder.
Lately, we have also introduced changes to the material: we now use stainless steel, making the bracket assembly even tougher than before. There are no situations that are too demanding for it anymore.
Contact us for more information.