Jan 28, 2019
Three nodes in a cartesion coordinate system are used in order to create a triangle element (or short element).
Adjoining Elements share the same nodes.
The line from one node to another is called element edge.
In order to ensure a correct FEM mesh it is not allowed to have a node of an adjoining element on an element edge of another triangle element.
The sequence in which the nodes are selected determines the direction of the normal vector for the triangle element.
The normal vector defines the front side and the back side of an element.
The quality of all elements needs to be checked before a simulation can be started.
Nov 5, 2018
In the measuring technology a trigger designates a triggering event or an impulse. In combination with pressure sensors in a mold e.g. start of injection is needed as a trigger signal. With this the pressure curve for one cycle will be recorded. Regarding quality control with IR-ThermalSystem the trigger signal will be given using a limit switch as soon as the mold is completely open.
Oct 20, 2020
Substances exist in solid, liquid and vapor phase – the such a called thermodynamic phases. Under normal conditions, the phases transfer from solid to liquid to gas and the other way around.
At the tripple point a substance can exist in three different thermodynamic phases in parallel (e.g. solid, liquid and gas phase).
The phase diagram shows, that the phase boundaries meet at the tripple point.
Helium is the only known substance, which has no tripple point with solid/liquid and gas phase.
All other materials can exist in these three phases at the same time.
Water (H2O), same as other substances is present at the tripple point in solid, liquid and gas phase, also called the thermodynamic equilibrium.
Below the tripple point water changes its phase directly from gas to solid, also called frost point.
Phase diagram with the
tripple point at the intersection between the phases solid (blue), liquid (purple) and gaseous (gray).
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
Oct 14, 2025
A TTY interface (teletypewriter) provides a text-based communication channel between a user and a computer. Originally, the term referred to physical teleprinters connected via serial lines to send input and receive output. In modern Unix and Linux systems, TTY refers to virtual terminals that serve the same purpose—allowing users to input commands through the keyboard and display system output as text. These interfaces remain fundamental for command-line interaction, system administration, and automated processes, even in environments dominated by graphical user interfaces.
Classic terminal with software for communication via TTY interface
Related topics:
Terminal
Shell
Command line
This glossary of plastic industry is provided by PLEXPERT Canada Inc.
Mar 14, 2023
If a cold runner is used and an automated separation between part and runner is wanted, a tunnel gate can be used.
In this case the gate will be on the side of the part or a rib.
The tappered shape leads to a small gate size on the part surface and allows a good removal of the cold runner during mold open.
A baffle wall at the end of the tunnel is used to collect cold melt at the start of injection.
The separation between runner and part is possible by using a standard two plate mold.
Often there is a positive impact to the parts appearance due to the less visible gate on the side of the part.
Injection
mold: Using a tunnel to fill the
part
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
