How to treating welding mark in injection molding, mold design and product design
In actual engineering practice, commonly-used methods for treating welding mark include: […]
Adverse factors of injection machine and product structure design affect injection filling
Adverse factors of injection machine and product structure design are in the following: […]
introduction to through-hardened plastic mold steel
Compared with casehardened steel, the outstanding merit of through-hardened steel is that the heat treatment thereof is simple, wherein extra heat treatment can be re-made during subsequent mold repair process. It’s demerit is that crackles can easily occur, especially for large-scale molds. […]
introduction to Polyvinyl Chloride Resin
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 [...]
something about condition for injection and molding
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. […]
it is more effective to heat or cool slender slots of large quantity than large-sized slots in a mold
generally, it is more effective to heat or cool slender slots of large quantity than large-sized slots, which expands the range for mold temperature control. […]
some dielectric should be applied to the molds
on the other hand, in order to remove such defect as the welding mark and to produce plastic parts with high lucency, dielectric such as high temperature and high pressure steam, high pressure hot water or thermal conducting oil should be applied to the molds to raise surface temperature molds. […]
temperature of plastic molds is very important
temperature of plastic molds directly influences the molding quality and productivity of plastic parts, for thermoset plastics, […]
a gate will elevate the temperature of the cooling resin by friction
a gate will elevate the temperature of the cooling resin by friction as it flows through the narrow gate, […]
what is the primary principle in selecting a feeding system in mold design?
so when we select a feeding system, what is the primary principle? I think it is to maintain the temperature and pressure as it flows out of the nozzle and fill out the cavity easily. Commonly, it prefers a “ short and thick” spure, runner, and gate. Other considerations are also given to the requirement [...]