about thermal insulation runner
thermal insulation runner is one of the simplest in hot runner system, at first, in the hot runner, because the molded materials have the poor thermal conductivity and the large section of the runner, […]
let’s try to describe hot runner system
let’s try to describe hot runner system, that means between the major running channel of mold and the gate of the molded product, […]
more details about coares lead screws
as for coarse lead screws, I have more details, during the demolding process, how to drive the cores, yes! The opening movement of the molding machine is transformed into a rotary action, […]
what about molds with coarse lead screws?
what about molds with coarse lead screws? I think, that is the most simplest driving method, because nuts mounted in the machine is the most reliable elements for thread-forming cores. And we can save setup time and special control of the stroke.
as for rack, what is the most important?
as for rack, what is the most important? Yes! It should have an accurate pitch and precise bearings and guides.So that the functioning of such mold is absolutely flawless.
more details about unscrewing mold with rack
I want to say some thing about unscrewing mold with rack. In these molds, the diameter of part, the force of the machine or the rack drive limit the number of threads that can be molded, and the opening movement of the machine or a separate hydraulic or pneumatic actuator can actuate the stroke.
how to drive unscrewing equipment in a mold
when a mold has an set of unscrewing equipment or more. How to drive them, yes! The drive force for these mold is transmitted from the opening movement by a lead screw with coarse threads or a rack. […]
a mold with unscrewing equipment
in all the molds with unscrewing equipment, please pay your attention to an exact mounting and alignment of cores and device units. For example, insufficiently supported cores, particularly slender cores, can be shifted from their center position by the entering plastic material.
design an unscrewing device in a mold
hey！everybody， please don’t forget one detail during designing an unscrewing device in a mold, that is very important, do you know what? Yes! Please make sure if this part is designed in this way that it can be protected against rotation.
threads should be screwed off or out of the part
no matter cores for internal threads or sleeves for external threads，the mold is either open or closed，they should be rotated in the mold， during demolding， they should be screwed off or out of the part。