Our Master Molders use scientific molding techniques and best practices to achieve improved molding quality, productivity profitability. Uneven mold temperatures cause molecules to cool and shrink at an uneven rate, resulting in mold warpage. PMC is recognized in the industry for solving complex molding challenges that other plastic injection molders can’t solve. We are able to specialize in this area of expertise because of our certified in-house Master Molders. Since so few plastic injection molding companies have certified in-house Master Molders, most are not able to solve molding challenges or create complex products. When determining melt temperature you must consider:Engineered Resin ChosenResidence TimeScrew and Barrel DesignMechanical Work Imparted to the MaterialFinal Property RequirementsMelt Temperature IssuesMelt Temperature is InconsistentMelt Temperature is not HomogenousExample of Melt Temperature Effects on a Part

How To Reduce Part Weight In Injection Molding

Plastic Molded Concepts is a U.S based company that uniquely specializes in molding with engineered resins. We frequently provide plastic injection molding services for mission-critical parts in industries, such as aerospace/defense, automotive, medical and more. In addition to providing plastic overmolding services, PMC provides a comprehensive range of other plastic molding services including mold design assistance, modeling, prototyping, manufacturing, and testing. Oftentimes parts must pass certain requirements in order to go to market. These may be private, governmental, national or international regulations. The final common processing defect is improper melt temperature. When using the processing guides supplied by the materials manufacturer you will see a range of temperatures suggested.  This process value is important to making sure that you are not destroying any of the chemistry involved in the making of the final part.  The mold temperature is equally as valuable in the development of stress.  Before you attempt to mold the first part, make sure the resin purges out the nozzle in an even-smooth-creamy-melt for the entire amount of resin that is destined to be injected into the mold.  It’s no good to have a nice creamy melt stream halfway through the injection of the material stream and the last half look like corn-cobbs. This process is already off on a bad start. Smooth is best!What’s the Bottom Line? Our experts at PMC are extremely knowledgeable in working with resins and have 45 years of experience in overmolding all types of projects. We work with our customers to make sure the overmolding material compatibility will yield the highest quality product for their applications.

How To Avoid Silver Streaks In Injection Molding

When it comes to plastic injection molding, quality assurance is key. PMC performs quality control systematically throughout the entire process, as well as at critical checkpoints. Cavity pressure is directly related to part dimension. The variation of cavity pressure will vary the dimension in a part.  The less the variation, the tighter the dimensional control or variation.  The higher the cavity pressure value gets the less the part will shrink, all other values remaining the same.  One rule of shrink to remember is that plastic shrinks less in the direction of plastic flow and more perpendicular to flow.  A common error in this process is when molders experiment with machine settings in order to determine when the gate freezes. At this point, a defect occurs in the parts and then reverses that move until the defect goes away. The problem with this is that the other 3 processes are going to interfere with the finished part properties in ways the molder cannot see. This mistake not only costs manufacturers money but costs customers when they find out their new plastic part does not seem to last very long in its intended use.Cooling and Injection Rates “I remember those days when my parents would tell me to get a college degree and become someone to be proud of.  Wow, what pressure!  I just couldn’t see myself sitting behind a desk all day, every day. It all sounded so boring! We can help you identify the right solution for stress cracks in your plastic molded parts. Contact our experts today. These markets (Electrical/Electronic, Appliance Transportation) are each expected to grow by approximately 3-4% every year for the next 3 years, which will continue to propel the market demand for ABS resin in plastic injection molding.Electrical/Electronics