The PVC monomer arises from the reaction between ethyne and hydrochloric acid, and the monomer thereafter is aggregated into PVC through various methods, PVC is devoid of stability against heat and light, and therefore, stabilizers shall be added therein to avoid discoloration or decomposition upon the materials’ being processed into finished products. Various stabilizers are [...]
Increasing the effectiveness of EDM operations does not come solely with technological improvements in the EDM sinker. This is one of many aspects needing to be considered when working to optimize EDM performance and increase productivity. Other areas of consideration include the type of dielectric fluid, tooling and electrode material used in the EDM applications. [...]
Speed, precision and stability are the key attributes of a mold machine. With the increased accuracy demanded by sophisticated molded assemblies, particularly in the automotive supplier industry, mold shaping machine tools are breaking new ground in precision, speed and multi-axis cutting. […]
The U.S. is one of the few countries in the world still designing and building molds to inch standards when the global standard for measurement is metric. By using the inch standard our industry is out of sync with the rest of the world (except Liberia and Burma). This became clear early on in my [...]
For years we have been hearing about the virtues of aluminum molds for injection parts, and First-rate mold company’s Mold Builders has built its fair share—mostly for special-purpose applications that did not require many actions. For smaller molds using specialty aluminum has its benefits; and, if cycle times are critical, you can justify the high [...]
when the temperature is between vitrification temperature and viscous flow temperature, the polymer shall be under highly-elastic state, […]
but when the temperature is below the vitrification temperature, the polymer is under glassy state, which is hard solid, wherein energy from the molecular thermodynamic movement is low, […]
I want to tell you something about condition for injection and molding, the large molecular structure of polymer and the features of molecular thermodynamic movement have determined that polymer has such states of aggregation as the glassy state, highly-elastic as well as viscous flow state etc. […]
Rust prevention for the slot or channel should be taken into account, structure of the slot and channel should be designed for the convenience of cleaning. […]
cooling at the gate part should be intensified, for cooling only, avoid setting the medium channel at the welding mark of the plastic parts, whereas the heating of medium channel should be preferably near the welding mark. […]