- المجال: Software
- Number of terms: 1241
- Number of blossaries: 0
- Company Profile:
Moldflow develops plastic injection molding software.
Control limits are statistically determined values between which a control variable is allowed to range without adjusting the process. Control limits provide an indication of the variation in the injection moulding process.
Industry:Software
A cooling channel is a passageway in a mould for circulating water or another cooling medium, in order to control the temperature of the metal surfaces in contact with the plastic being molded.
Cooling channels are typically connected to form a circuit. Cooling channel configurations can be serial or parallel.
Industry:Software
Gross cooling time is the time after the velocity phase until the part is sufficiently cooled to be ejected from the mold. Therefore, gross cooling time is the sum of the pressure phase (packing and holding) and the net cooling time
The net cooling time is the time after the pressure phase and before the part is ejected from the mold.
Industry:Software
Cracking is the formation of a narrow separation in a plastic component, usually by the rupture of chemical bonds due to internal and external stress.
Industry:Software
Crystalline polymers are a family of polymers that are characterised by an ordered arrangement of the molecules which fit closely together. Typically, crystalline polymers are more dense than amorphous polymers. A polymer in a crystalline state is a solid, due to its solid crystals, which have definite geometric form.
Crystalline polymers display an X-ray diffraction pattern. The degree of crystallinity determines the intensity of the pattern. The pattern can be used to identify the polymer.
See also Amorphous Polymers.
Industry:Software
Crystallinity is a solid, molecular state of some polymers which denotes compactness of the molecular chains. This characteristic is attributable to the existence of solid crystals with definite geometric form.
Industry:Software
During cooling some polymers form an ordered molecular structure which are called crystals. The rate of crystallisation is a function of both temperature and time. The level of crystallinity achieved is determined by cooling rates. Rapid cooling rates are associated with lower levels of crystalline content and vice versa. The level of volumetric contraction (shrinkage) is also affected by degrees of crystallinity, with higher crystallinity resulting in greater shrinkage.
In injected moulded parts, thick regions tend to cool slowly relative to thinner sections, and so have higher crystalline content and hence higher volumetric contraction.
Industry:Software
Cure is a stage reached by a thermosetting material that is sufficiently cross-linked to form a solid; the cross linking is the result of a chemical reaction.
Sometimes this term is used to describe the solidification of thermoplastics; this is a physical process of removing heat from the thermoplastic.
Industry:Software
