| A |
|
| Additives |
External substances mixed with the resin to enhance its characteristics (color, smoothness, fluidity) |
| Adhesive Assembly |
Joining two or more plastic molded parts together using adhesives |
| Air Burn |
When gases inside the mold are not properly vented, they could burn up the surface of the part and leave black or brown burn marks |
| Automotive parts manufacturer |
A person or a company that makes parts relating to automobile industry, with the intention of selling |
| B |
|
| Back Pressure |
Resisting pressure induced on the molten material, when it is been injected into the mold. This increased the molding time since more injection forces are needed |
| Blushing |
Plastic mold can deform excessively in highly stressed areas and leave white deform marks |
| Brighteners |
Kinds of additives used to increase brightness and smoothness of the surface |
| Broken Mold Marks |
Defects on the part caused by mold damages |
| C |
|
| Charge |
Material quantity (weight or volume) used to fill up the mold one time |
| Co-Injection |
Injection of multiple material into the mold simultaneously |
| Compression Molding |
Process of molding by applying pressure on top of the mold |
| Cycle Time |
Time taken for a mold to fully finish and machine to come back to the original state |
| D |
|
| Degassing |
Opening and closing of the mold at early stage, which allows entrapped gases to bubble out |
| Direct Gate |
The sprue which directly allows the molten material to feed into the mold cavity |
| Discoloration |
Unintended changes of color from designing conditions |
| E |
|
| Environmental Sustainability |
Indefinite use of renewable energy, and harmless material, with increased levels of recycling and reusing, while nullifying the pollution. If a process comes with these characteristics, it can be identified as an environmentally sustainable process |
| Extrusion |
Forming continuous shapes by pressurizing molten material through a cavity |
| F |
|
| Family Mold |
A mold which consists of multiple different cavities and allows to produce multiple parts at once |
| Filler |
An inert substance mixed with the original material, in order to increase the strength and other properties while maybe reducing the cost |
| Finish |
Surface quality and overall quality of the finished part |
| G |
|
| Gate |
A channel which allows the molten material to flow into the mold cavity |
| Green Manufacturing |
Environment friendly manufacturing process which use renewable energy, and environmental material, with reduced wastages, pollution and emissions. Reusing and recycling are at high levels |
| H |
|
| Hot Runner Mold |
A mold which gates and other flow lines are kept under hot conditions. Since it is also insulted from cooling cavities, no scrap will be present at the end |
| I |
|
| In-Mold Assembly |
Molding several parts using the injection molding process, then assembling them together by moving them inside the molding machine itself |
| Insert Molding |
Parts are manufacture by injecting plastic over a pre-placed metal insert (USB cables, electric plugs) |
| J |
|
| Jetting |
A turbulent flow caused in the molten flow due to undersized gates |
| Jig |
A tool used to whole the parts tightly during the manufacturing process |
| K |
|
| K-Factor |
Used to indicate properties like insulation factor, or coefficient of thermal conductivity |
| Knockout Pin |
The pin that aids to remove the solidified part from the mold cavity |
| L |
|
| Land Area |
The area of mold parts that is in contact, when two mold parts are clamped together |
| Lubricants |
Additives used to facilitate the molten material flow, without effecting original properties of the compound |
| M |
|
| Metal Parts |
Parts manufactured by injecting metal powder into molds and pressurizing them until them are bounded as a sold |
| Mold Inserts |
Parts that put inside the mold to achieve cavities in the molded part. Inserts are placed inside the mold cavity as separate components. They are also used to achieve desired cooling conditions |
| Mold Maker in China |
China is known to be the largest supplier of molding components to the world. There are many mold making companies located in china |
| Multi Shot Molding |
Injecting multiple types (color, type) materials sequentially in different places of the same mold |
| Multi-shots Mold |
Mold used in multi shot molding. Here, the mold has multiple injection openings |
| Multi-components Mold |
Mold used in multi component molding |
| Multi Component Molding |
Using combinations of multiple types of resins for the molding process, in order to increase the properties (aesthetics, strength) of final outcome. Multi-component molding is a variation of multi component molding |
| Multi-Color Mold |
Mold used in multi-color molding. Here, the mold may or may not be partitioned to achieve desired color sequence |
| Multi-Color Molding |
Making continuous or discontinuous color patterned parts by injecting different colors of materials to the mold cavity, in desired places |
| N |
|
| Nucleating Agent |
Additives mixed with polymers in order to facilitate increased crystallization rates |
| O |
|
| Orange Peel |
Rough, lump full surface occurred by high moisture contents in the mold cavity and poor heat transferring means |
| Over Molding |
Molding process where mold cavity is partially filled with one material, then the second material is injected over the first one such, first injection is enclosed by it |
| Over Pack |
When molten material is flowed through gates, it has a tendency to fill the easiest path first. This causes the molten material to highly pack along that path ultimately leading to distortions |
| P |
|
| Parting Line |
The line visible in the final part, where two mold halves were contacted |
| Plastic Injection Molding |
Most frequently used method to manufacture plastic components. There, molten plastic in injected into a mold shaped as the desired part and left out to solidify. Whole process in done in an injection molding machine |
| Plastic Injection Molds |
Hollow containers made in desired part shape, which allows injected molten material to cool down and solidify inside them |
| Prototype Mold |
A primary mold built before the final mold, in order to ensure the shape and dimensions are correct |
| R |
|
| Recovery Time |
The time taken by the pumping screw to inject a shot and come back to the original state |
| Resin |
The basic substance used in the molten stage for injection molding process |
| Runner |
The channel that connects the sprue and cavity gate |
| S |
|
| Scrap |
Waste of the molten process (impurities, residue after polishing) |
| Short Shot |
When the molten material is not enough to fill the whole cavity, it is called as short shot. The corners of final outcome would appear as melted |
| Stack Molds |
Overall mold is designed by stacking two or more similar molds together and clamping them. Parts manufactured by stack mold will have two or more parting lines. |
| T |
|
| Tandem Molds |
A type of stack mold but the molding process is done with multiple alternating injection cycles |
| Tool |
Another word for the mold |
| U |
|
| Undercut |
An irregular geometry (protrusion or indentation) that prevent the smooth removal of the part from the mold |
| V |
|
| Vent |
Small diameter hole cut on the mold in order to let the entrapped air to release |
| Virgin Material |
Plastic compound or resin that have not undergone any additional processing operation other than initial manufacturing processes |
| W |
|
| Warpage |
Distortion caused by excessive internal or external stresses |
| Y |
|
| Yellowness Index |
When the color of a part is evaluated against yellow color scale, it is given a yellowness scale value |
