WHY KOR-LOK?
Slide core compression and thermal changes cause "core backup"… KOR-LOK® eliminates it!
Elimination of "Core Backup"
Steel Compression: Physics dictates that a pressure force applied to any material will cause compression. Without the ability to easily measure it during loading, it is often "invisible" to practical experience, leading to the false assumption that steel, for example, is incompressible and core dimensions will not change under load.
Thermal Variation: Physics dictates that temperature changes will change the size of an object. Like compression, temperature changes are less likely to be considered and are difficult to measure. Initial reviews often assume that temperature is not an issue.
Core Changes look like "Backup": During injection, the resulting changes from pressure and temperature often cause the core length to decrease and the resulting core face position to be "backed up" from the desired position. These changes are "seen" on the part, as if the entire core was "backing up", when in fact the no load room temperature timing was correct. Core face "backup" during injection may be as much as .020" or more depending on mold geometry.
Attempting to compensate for compression and thermal effects with tryouts and "tweaking" can become time intensive, repetitive and very costly.
KOR-LOK® eliminates "core backup" by preloading the core above the force of injection.
KOR-LOK® COMPENSATES FOR:
