Introduction to Polypthalamide
Polypthalamide, an engineering thermoplastic, is a member of the nylon family with excellent high temperature properties (heat deflection temperature of 280oC and a continuous use temperature of 170oC). […]
Your Ejector Pin is Correct or not?
There are many different kinds of ejector pins in the market nowadays and it is a challenge for users to select the correct ones. In most cases, selecting an inappropriate ejector pin is wasting resources and creates inefficiency in production. […]
How to design an efficient mold
Designing a product for high production tooling involves considerations that must be closely evaluated: gating location, part ejection, wall thickness, material flow characteristics, cycle time, hot runner feasibility and assembly at high rates. […]
Hot runner systems are a key to success
Hot runner systems are a key component of the multi-cavity injection mold. Ironically, hot runners are probably the least understood mold component from the moldmakers’ perspective. […]
Do a special mold
Years ago, in the days of drafting boards and electric erasers, there was a mold design department where a veteran lead designer welcomed a young new member to the design staff. An engineering grad with sufficient years of mold design experience, the new designer was surprised when on his first mold assignment, […]
Introduction to Rotating Core in injection molding
Rotating cores are the most common solution to this problem. This is one of the most common setups. The rotating core features a gear, bearing journals and a retracting thread, in addition to the molding thread. The basic operation is to rotate the core and retract it at the same time and at the same [...]
Introduction to Collapsible Core
The collapsible core offers some unique advantages to the traditional rotating core. The concept of the collapsible core is to first collapse the core to a small enough size to be able to clear all the molded features of the piece part, and then retract the core from the molded part. It sounds and looks [...]
Introduction to Flash-Free Collapsible Core
The applications of a flash-free collapsible core are nothing short of incredible. Undercuts, O ring grooves, tabs, ribs, bosses, locking tabs, and threads are easily produced. Straight or even back-tapered bores are no problem. […]
Reverse engineering helps Moldmakers
Reverse engineering or digitizing a physical part is a critical task for any mold and pattern shop. Most customers say that they design all of their parts on a CAD system; […]
Rapid prototyping Impacts on Mold Building
RP is basically a visual aid that allows the moldmaker to evaluate the design and know it is correct before the process moves to the hard tooling stage. […]