Consumer Products:Demands for Thinner Walls/Lightweight Designs Challenging Moldmakers
Recently MoldMaking Technology magazine reached out to its Editorial Advisory Board to examine current trends in the consumer products market and how moldmakers are addressing the challenges.
MMT: What trends are you seeing in the consumer products marketplace?
Dick Laverty, VP, Chicago Mold Engineering (St. Charles, IL): The biggest trend that we see is our customer's desire to make parts with thinner walls to decrease the overall costs of their products.
Tom Lynn, Tooling Engineer, General Electric Appliances and Lighting (Louisville, KY): “I see the consumer industry on a slow recovery, but a lot better than a year ago. Products in some industries are making subtle improvements, rather than a total redesign. Consumers are more careful about making sure they’re getting their bang for their bucks. This trickles down to the moldmaking industries with more hours. Moldmakers and machinists within the trade are starting to move around a bit more. Taking a new job for a few more bucks in the pay envelope is a little easier to do, in that workers feel more confident in our industries’ recoveries.
Ralph Neufarth, Package Development, Procter & Gamble (West Chester, OH): “Obviously with oil prices, cost is a big deal. We are seeing lower costs packages—which means tooling too. Lightweighting for sustainability is strong. Package materials are being made from sustainable materials and the molds must process these efficiently. Finally, more cavities in one mold utilizing rotating cubes, stack molds or a combination of the two.
Michael Zacharias, President, Extreme Tool and Engineering, Inc., (Wakefield, MI): “I see several trends. A lot of our clients are lightweighting their designs. They do this for raw material savings, but also often more importantly for the cycle time savings (which translates into reduced part cost) as a result. Part complexity continues to increase as they combine/eliminate parts; IML and other labeling/decorating has become more widely used; and two-shotting/overmolding is often used. Design/part changes also are frequent, even during—as well as after—a build.
MMT: How is your company addressing these challenges?
Laverty, Chicago Mold Engineering: “For the moldmaker it makes it very challenging to build the molds for the larger parts with the thinner walls and still maintain enough part integrity for strength. It also causes challenges with getting the proper gating on the molds to insure that the parts are full and packed out. This entails doing more finite element analysis to insure the strength of the part and mold flow, mold cool, stress and warp analysis to determine the gating required and whether or not additional flow channeling will be necessary in order to mold the parts with the thinner walls. This is something that we see more and more of every day.
Lynn, GE: Challenges occurring with consumer products in moldmaking would center on the OEM’s need to streamline part design. Some OEMs are combining more parts—making one part from two or even three parts to perhaps increase the cost of the new part. But, comparing that to the total cost of three parts, the new part is less expensive overall. This more complex part means a more expensive mold and more expensive molded part. The trickle-down to the moldmaking industry is that more complex tools means more advanced machining centers and more jobs for moldmakers and machinists. The shops that are making the investment in new equipment are those that will reap the benefits.
Zacharias, Extreme Tool & Engineering: The trend toward lightweighting/thin wall parts bring complexity to molding projects, even when geometry itself is not complex. There are lots of special considerations in molds for thin wall applications.
Part complexity increase is not necessarily an issue, but does drive higher tool costs. It is only an issue when they need cheaper parts and cheaper molds (insufficient tooling budgets). IML and two-shot molds are both widely used and accepted technologies, and are not an issue if the client has sufficient budget for the special molds.
Changes are never easy during a build, but utilization of fully parametric solid design packages is the single biggest tool to enable doing this successfully.
For more information:
Dick Laverty / (630) 584-1311
firstname.lastname@example.org / www.chicagomold.com
Tom Lynn/ (502) 452-4193
email@example.com / www.ge.com
Ralph Neufarth / (513) 634-9209
firstname.lastname@example.org / www.pg.com
Mike Zacharias / (906) 229-2510
email@example.com / www.extremetool.com
The latest battle in finely detailed restoration/repair of mold materials.
Mold cleaning is just one part of a systematic and comprehensive approach to mold maintenance. Here’s one moldmaker’s strategy for injection mold cleaning and an explanation of where and why different techniques are employed.
In time and with practice, each polisher will develop his or her own tricks and short cuts.