what is welding mark?
as an injection molding engineer, he should be very familiar with welding mark, the thread mark formed at the front confluence of two or more melt flows in the cavity is called welding mark or welding line. […]
Adverse factors of plastic material and injection mold affect injection filling
Adverse factors of plastic material and injection mold are in the following: […]
Plastic parts mean cost savings
Maybe you don’t understand when you look at this title, at first, Plastic materials fall into two basic types of process groups: Thermoset and Thermoplastic. […]
Plastic products are easy to gain good structural strength
As a professional engineer, he(she) really knew how to choose the right materials to build a strong house. The right plastics make your products light-weight, easier to use and yet possess increased structural strength. If we use engineering grade materials in our products, Plastic parts can be stronger than metal parts. In structural design of your [...]
Molding plastic part can eliminate secondary operation
Every people who works in manufacturing industry must know manufacturing cycle meaning– Eliminating secondary operation further reduces costs. […]
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 [...]