Case Studies

dMac Improves The Yield Of Globoid Parts By 48%

Injection molded globoid
Injection molded globoid-shaped part using additively manufactured mold cores with conformal cooling
dMac Precision Technology Co., Ltd. is a leading engineering solution provider in Asia Pacific that designs and manufactures custom Conformal Cooling (CC) systems to improve the production yield of globoid parts. Manufacturing CC channels additively has proven to be ideal compared to CNC.

In the highly competitive injection mold industry, designers aim to differentiate themselves with complex, value added tools that improve customer production yields for organically shaped parts.

dMac Precision Technology Co., Ltd. is a leading engineering solution provider in Asia Pacific that designs and manufactures custom Conformal Cooling (CC) systems to improve the production yield of globoid parts.

Manufacturing CC channels additively has proven to be ideal compared to CNC. dMac has successfully designed CC channels in the core of globoid molds to improve heat dissipation, thereby reducing production cycle times. With their experience in traditional mold & die design and AM know-how, dMac has successfully created a niche market demand for additively manufactured tools in the competitive Chinese tool industry.

Challenge

dMac is a 3D metal engineering solution provider in China that specializes in the design and manufacturing of complex tools for both the injection molding and die casting industries. Achieving a stable and efficient production output for globoid shaped parts is one of the most common production challenges faced by the injection molding
industry in general, as traditional cooling systems with CNC machining impose limitations on globoid shaped parts. Due to manufacturing constraints, the runner is generally too far away from the part resulting in non-homogeneous cooling. This often results in longer cooling times and sometimes an increase in the parts rejection rate. Many customers approached dMac to provide an engineering solution to improve their production cycle times for organically shaped parts during mass production. With their traditional mold design and additive manufacturing know-how, dMac developed an optimized conformal cooling system specially tailored to globoid-shaped parts.

Solution

China has one of the world’s biggest mold and die industries, with more than 40 000 enterprises. In 2015, as a new start-up in China, dMac successfully created and built a network of sustainable clients in the traditional mold & die industry with additive manufacturing (AM).

Conformal cooling“dMac’s business philosophy is to provide affordable metal AM to all tool makers. We don’t think additive manufacturing is an emerging technology any more. We think additive manufacturing has emerged, and people are using it successfully to improve production efficiency.

“ Jeffrey Koh, Founder / CEO of dMac Precision Technology Co., Ltd.

dMac provides one-stop engineering solutions for the design, manufacturing and post-processing of additively manufactured tools. In order to compete with traditional mold and die manufacturers, dMac decided to explore the untapped AM market. Instead of tendering for traditional manufacturing contracts, dMac focuses on helping customers address common challenges in their production lines, especially in the production of globoid-shaped parts. dMac is one of the few manufacturing bureaus in China capable of designing, manufacturing and post processing additively manufactured tools that help customers address production yield challenges. With dMac’s experience in traditional mold design and initial application support in AM process know-how provided by EOS, dMac has now created their own niche intellectual property in optimized mold design, manufacturing and post processing of AM tools with complex conformal cooling channels. dMac’s strong technical support coupled with EOS’s reliable and repeatable machine process has helped dMac differentiate themselves from the mass tooling market. To date, dMac has successfully supported more than 20 000 additive manufacturing tools for mass production. With additive manufacturing, dMac manufactures conformal cooling systems that help manufacturers
improve the production yield of globoid-shaped parts. The conformal cooling cores have runners that conform to the part shape, with a constant average distance of 4 mm from the product surface. The advantages of having a uniform cooling area and a stable water flow direction through the cooling channels helps to improve heat dissipation and shorten the production cycle time. In addition with hybrid manufacturing, dMac further helps customers to reduce
the cost of conformal cooling tools.

Results

Additive manufacturing enables tooling engineers to freely create channels within the insert that conform to the shape of the final product. The conformal runner ensures that the cooling effect is homogeneous across the total
surface area of the part being molded. With their additive manufactured conformal cooling system in place, one customer reported the following advantages:

Cooling AM Tool

With Conformal Cooling AM Tool:

  1. Customer saves 60 000 RMB per production lot (OPEX)
  2. The investment required by a conformal cooling tool is 14 000 RMB (1 722 Euro). It only takes 70 000 pcs to pay for itself.

dMac Precision Technology Co Ltd.

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