Thin-walled plastic parts molding

Injection molding is the processing of large quantities of thin-walled plastic parts most important and most economical processing methods. To create high-quality products, in addition to the choice of materials to meet the performance requirements of the above, but also the molding machine, mold and molding process has strict requirements. From successful processing machinery, molds, craft a good combination.
Single-screw reciprocating rotary molding thin-walled injection molding machine is ideal for plastic models, its uniform and continuous cleaning effect of the plastics injection of plastic melt temperature and has a good balance of mobility, quality can be guaranteed good parts. http://www.prmindustry.com/
Abstract...Articles section Good screw design and structure of a successful processing of the key pieces of thin plastic. Screw length to diameter ratio (L / D) is usually 20:1 ~ 24:1, the feed zone, compression ratio of 2.0:1 ~ 2.5:1, and the screw tip was conical with only loop, the parts without nitrogen treatment. In determining a specific thin-walled molded plastic pieces used injection molding machine specifications, parts of the total injection volume and the total projected area that must be considered two major underlying factors. When the total injection volume of plastic (including the master, the runner, gate, cold material points) and the maximum injection molding machine volume ratio of 0.35 to 0.75 usually get the best results; has been determined all injections, the total amount of projection area, should be the projected area per square centimeter to provide 193.5 ~ 451.5kN clamping force, in order to avoid the phenomenon of flash parts occurs. 
In addition, the thin plastic injection molding machine is also on the pressure and demands a higher injection rate, for example, wall thickness 2.5 ~ 3.0mm wall thickness of the flow distance is less than 100:1 with the traditional application of thin-walled parts, injection molding pressure of 62.0 ~ 96.5MPa, filling speed of 3 ~ 5s enough; and wall thickness of 1.2mm and wall thickness from the flow ratio of 100:1 of the application of thin pieces of lead, injection pressure to as high as 137.9 ~ 241.0MPa , the filling rate is 0.1 ~ 0.5s just do it. So all in all, the microprocessor-controlled injection and closed-clamping system with energy storage device coupled with the high-pressure die heating temperature control box high speed, high precision injection molding machine will become a mainstream machine thin-walled plastic parts type

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            Peter Huang