introduction to casehardened steel
Casehardened steel can be provide with tough core and abrasion-resistant surface, wherein high surface hardness will be beneficial for polishing treatment. […]
plastic mold parts fall into working parts and structural parts
plastic mold parts fall into working parts and structural parts, working refer to those determining the geometrical shape, dimension and precision of plastic products, and are also called molding parts or the molding section of parts, such as cavity, core, insert, molding pin and molding ring etc, their molding condition is rather complicated and the [...]
Basic requirements for the performance of plastic mold steel-2
The steel used for plastic molds covers a wide range, from ordinary steel to special steel. This was more obvious in the early days of plastic molds and is now becoming more advanced. Special steel has its own system. The chemical composition of mold steel is basically the same as that of alloy tool steel, [...]
basic requirements for the performance of plastic mold steel-1
When a mold designer designs a mold, he or she needs to choose correct mold steel for the mold, so the mold designer need to know some basic requirements for the performance of plastic mold steel: High rigidity and sound abrasion resistance, surface hardness of cavity should be 30—60 HRC and hardenability>55HRC, sufficient hardening depth [...]
how to choose correct mold materials
Plastic mold is of multiplex varieties and specification. Due to it’s complicated shapes and low surface roughness, it is rather difficult to be manufactured. […]
introduction to Phenol Resins
Phenol resins are made from phenol and formaldehyde and mostly contain such fillers as wood meal, asbestos, craft paper and cloth. Molding will be a lot easier when being added with wood meal, […]
introduction to Urea Resins
Urea resin can be produced through the reaction between urea ( ammonia) and formalin, catalyzed by acid or base. It is formed through compression molding adopting hard chrome plating model, […]
introduction to Melamine Resins
The substance is colorless and transparent, and can be colored freely, it is very hard and is of sound chemical resistance, water resistance, heat resistance, and fire resistance. […]
introduction to unsaturated polyester resins (UP)
UP is the compound formed by the alkyd of unsaturated binary acid and ethylene monomer. The resin is a kind liquid of low viscosity, which will not produce gas when being solidified. Hence the molding pressure thereof is rather low. Intensified by glass fiber, it’s mechanical intensity will be much higher.
introduction to Epoxy Resins( EP )
Major raw material for epoxy resin is reacted from propylene and benzene. The substance is adhesive to other substance, especially metals, and therefore, it can be made into adhesives. Another important feature is that it will not produce volatile substance when being solidified, and hence is of small shrinkage. Endowed with such advantages, it can [...]