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Precision ADM recently completed a conformal cooling mold project that developed an improved “Venturi Cup” for Melet Plastics. The project received funded from Canada Makes through its Metal Additive Demonstration Program. The goal of the project was to show how a mold optimized using additive manufacturing (AM) methods can increase quality and productivity.
“This project is an excellent example of how the Metal Additive Demonstration Program works,” said Frank Defalco Manager Canada Makes. “Learning about the capabilities offered by adopting AM is what will make Canadian industry more productive and conformal cooling is a key area that needs to be exploited.”
One of the major factors contributing to the deformation of molded plastic parts is a lack of uniform heat distribution throughout molds. Various areas of the final part created by a mold cool at different rates creating internal stresses and deformations.
Dale Kellington General Manager of Precision ADM stated, “conformal cooling applications continue to have a direct impact on part quality, cycle times and productivity of injection molded parts”
A warping defect was reported in the production of a “Venturi Cup” part manufactured by Melet Plastics Inc. for use in an AGCO-Amity JV air seeder. The goal was a reduction in the warping seen in the large rectangular section of the part. Proposed alterations included changes in material, wall thickness and coolant temperature, as well as an optimized mold for cooling produced by Precision ADM using additive manufacturing methods.
Using conventional mold design, coolant channels are required to be drilled as a separate operation but are restricted to a path of connecting straight lines. This restriction is the cause of non-uniform heat distribution that causes part deformation. Additive manufacturing methods can be used to create molds featuring a coolant channels that follow the contours of a mold, drastically improving heat distribution during cooling. This has the added benefit of eliminating the task of drilling cooling channels.
Dale added, “with software such as Moldex our engineers can simulate the injection molding process and demonstrate the beneficial cooling characteristics of conformal cooling molds for production”
The project showed significant results. This application of additive manufacturing showcases the complex subsurface geometries that are possible using the method. The use of the optimized mold together with a decrease in wall thickness resulted in a warpage reduction of 42%; an overall warpage reduction of 54% was achieved with all other alterations included.
About Precision ADM
Precision ADM is a contract engineering and manufacturing solutions provider that uses additive manufacturing (3D Printing) as a core technology. Precision ADM has created a full Advanced Digital Manufacturing hub from Design to Engineering, to Manufacturing and finishing. Complimented by multi-axis machining capability, PADM identifies, develops, and manufactures high value components and device applications for the medical, aerospace, energy and industrial sectors. PADM is headquartered in Winnipeg, Manitoba, Canada. www.precisionadm.com
About Melet Plastics Inc.
As Leaders in Engineering Plastics Solutions, the Melet team is dedicated to engineering custom plastic products that meet the needs of Original Equipment Manufacturers. Melet offers a comprehensive array of services to ensure that every step of the development process is a success – from product design, engineering, material selection, and rapid prototyping, to mold manufacturing, injection molding, and assembly. Melet operates out of a state-of-the-art manufacturing facility complete with extensive automation and robotics. New capabilities include compression thermoforming of natural fiber composites at the Fargo location. www.meletplastics.com
About Canada Makes
A Canadian Manufacturers & Exporters (CME) initiative, Canada Makes is a network of private, public, academic, and non-profit entities dedicated to promoting the adoption and development of additive manufacturing in Canada. For more information on Canada Makes, please visit www.canadamakes.ca or contact Frank Defalco at firstname.lastname@example.org
The Metal Additive Manufacturing Demonstration Program is funding by NRC-IRAP and is designed to help Canadian industries increase awareness and assist in understanding the advantages of the metal additive manufacturing (AM) technology. Canada Makes works with a group of AM experts who provide participating companies guidance of the advantages and business opportunities in terms of cost savings and efficiencies of AM.
Toronto based Additive Metal Manufacturing (AMM) partnering with the University of New Brunswick (UNB) and CanmetMaterials is validating hybrid builds for diecasting and injection molding applications. A hybrid build is an innovative technique where subtractive and additive processes are combined to achieve maximum economic advantage.
“Cooperative projects that increase capability and value to Canada’s additive manufacturing supply chain is a win for the whole country,” said Frank Defalco, Manager Canada Makes.
The hybrid build process offers considerable cost benefit where the functioning part of an insert is smaller than the non-functional part and the cost of building the larger portion using additive technology can be expensive. A hybrid build is good for any application where molten substance is injected into dies and thermal issues are causing part warpage and lengthy cool down cycles.
Using its EOS M290, AMM is successfully combining different metals and incorporating conformal cooling channels in the additive portion of hybrids and achieving unprecedented results. Conformal cooling allows major reductions in cycle times, scrap and warpage of parts by lowering operating temperatures previously unattainable through traditional means. Lower operating temperatures also have the added benefit of longer tool life.
Mechanical and metallurgical validation testing of the hybrid builds is carried out in collaboration with the University of New Brunswick (UNB) and CanmetMaterials in Hamilton.
AMM announces two new certifications.
AMM recently received both their ISO 9001 certificate and their Controlled Goods certification allowing them to penetrate further into Tier 1 manufacturers.
About the AMM
AMM is a progressive, productive and respected leader providing integrated and advanced manufacturing technology solutions within the emerging market for Additive Manufacturing ensuring that our industrial partners have the best opportunity to excel and Take Back Manufacturing for Canada. www.additivemet.com
About University of New Brunswick
The faculty of engineering at the University of New Brunswick has been preparing graduates for success in their engineering careers since 1854, when UNB was the first university in Canada to introduce an engineering program.
UNB graduates have gone on to help design and build bridges, make cleaner fuels and next-generation wireless communications tools. Researchers at the faculty are developing technologies to help improve satellite imagery used by Google Earth and the Canadian Department of National Defence. Others are in helping develop biofuels and renewable energy. www.unb.ca/fredericton/engineering/depts/mechanical/people/mohammadi.html
About CanmetMATERIALS (Natural Resources Canada)
CanmetMATERIALS is the largest research centre in Canada dedicated fabricating, processing and evaluating metals and materials. Scientific and technical staff in Hamilton and Calgary research and develop materials solutions for Canadian industry in the energy, transportation and metal-manufacturing sectors. http://www.nrcan.gc.ca/mining-materials/materials-technology/8234