Low pressure pouring is a prototype manufacturing process of rapid prototyping manufacturers. Polyurethane materials are mixed and injected into rapid molds at room temperature and low pressure, and products are formed through chemical and physical processes such as material polymerization, crosslinking and curing. Low pressure pouring is suitable for small batch production in the process of product development, as well as production of cover plate with simple structure and large thick wall and uneven products.
The parts produced by this process can be as large as the size of automobile bumper and medical trolley, and the applicable quantity is between 15-2000 sets. Sijunda prototype factory has accumulated rich experience in the field of automobile rim low-pressure injection molding, such as bumper, fender, steering wheel, instrument panel, air inlet grille, door panel, front-end module, airbag cover plate and other automobile interior and exterior trim parts. A lot of production experience and technical methods.
Shandong rapid prototyping manufacturer reminds you that low-pressure pouring molding has the following characteristics:
Low pressure pouring molding process is not only determined by kinetics and thermodynamics, but also affected by physical conditions; The solidification time of the material is long, and the solidification and cooling of the material occupy most of the time; The molding material is thermosetting; The processing is carried out under low pressure, so it is only suitable for rapid prototyping with simple product structure.
The monomer or prepolymer enters the mixing head in liquid state through the metering pump in a certain proportion for mixing. After the mixture is injected into the mold, it reacts rapidly in the mold, crosslinks and solidifies.
The materials used in low-pressure pouring molding are mainly polyurethane materials. By changing the mixing ratio of materials, different elastic modulus of materials can be obtained, so as to obtain the required material properties. The cured material has physical properties similar to ABS, PP or PS. The process is suitable for producing prototype products with large and uneven wall thickness.
Low pressure injection molding can produce strong, flexible and lightweight parts, and it is easy to carry out surface treatment. Compared with typical vacuum casting materials, its material manufacturing time is relatively short. The viscosity of the mixture injected into the mold is much lower than that of molten thermoplastic polymer, so rim technology can be used to process large-size, light-weight and thin-walled articles. This light and thin product requires less clamping force, so it requires less equipment and low investment cost.
This is the characteristic content of low-pressure perfusion applied in rapid prototyping industry. If you need it, please pay attention to our website www.news1080.com Com consultation!