two methods can detect multi-process disease
People like hot runner molds if they behave. Behave means that the process doesn’t change over time, as it does with multi-process disease. There are two easy tests to detect multi-process disease: […]
What is the issue in hot runner mold?
Hot runner molds are great. Everyone knows that. We eliminate runners, grinding them and reprocessing them. So what’s the issue? All hot runner molds are not created equal. We have all seen the application where using a hot runner mold resulted in more scrap and more regrind instead of its elimination. Why would this be? [...]
It is very important to achieve cavity balance
One of the basic requirements for successfully molded parts is that we must have cavity balance in order to achieve process robustness and fast cycle times that are necessary to be profitable in today’s competitive, global market. In this article we will take a basic look at good and bad cavity layouts and runner designs. [...]
Which runer shapes support delivery of the plastic?
There are three main runner shapes that are used: (1) full round (2) half round and (3) trapezoidal with each one having certain qualities and performances that may be needed to support delivery of the plastic to each cavity. […]
Using hot runner technology can Improve Part Quality
When selecting gate location (regardless of whether the tool features a cold or hot runner system), balanced and even filling of the molded part is the top priority. Cold runner gating provides the moldmaker with simplified integration in terms of selecting the optimal gate location, […]
We can save money by using hot runner technology
Although a more expensive capital investment upfront, a hot runner system is a significantly more cost-efficient means to keep production costs to a minimum over the long run. […]
Using hot runner technology can have lower cycle time
The cycle time of any mold is largely influenced by the cooling cycle—how fast the resin can be sufficiently cooled so that the part can be ejected without permanent deformation. In any given mold, the areas that take longest to cool are those with the thickest wall section. […]
please realize the Importance of Runner Design and Analysis
The importance of runner analysis on design and molding seems to have been long overlooked. When many flow analyses are carried out, the focus tends to be mainly on the part and cavity. […]
What are the Common O-ring Failures?
Compression set is a phenomenon that causes most water leaks (not related to installation) in molds today. Simply put, this means that an o-ring has resided in a compressed state in the mold for so long that it has lost its ability to apply adequate force in the gland and overcome the applied water, air [...]
What is The Science of the Seal?
After an in-depth Web search and listening to numerous manufacturing reps speak in molecular detail, it is apparent that o-ring design/sealing is more complex than just a piece of rubber being squeezed between some tooling. […]