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Custom Die Cutting is NEDCs core competency. We offer custom die cutting through steel-rule dies. This enables us to offer essentially unlimited customization. This is because we can provide a steel-rule die with specific shapes, cut-outs, and diameters along with the ability to cut a specific material. Since these shapes, sizes, and materials are essentially endless our ability to produce custom gaskets, thermal pads, absorbers, and epoxy films are also endless.

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Array of Die Cut Parts

The modern way to “die cut” is to take advantage of all the uses of the steel rule die. The steel rule die is essentially a piece of durable wood such as maple that has “rule” in it; one side of the rule is sharpened. This steel rule is bent into the shape of the part and placed into the wood to create a tool that is very durable. The steel rule offers an economical solution to manufacture a quality product for large-scale runs. These steel rule dies “die-cut” hundreds of different shapes, and sizes of parts that range from extremely complex to very simple. One of the biggest benefits of dies is their durability, and their low cost. Some dies can be good for a million hits or more depending on the material.

The equipment is all that is needed to manufacture a quality part. A die-cutting machine comes down with enormous pressure, and precision to “burst” the die through the material.  Modern die-cutting machines offer computer algorithms and lightning fast die cutting ability. Our modern die-cutting machines utilize coordination of computers, hydraulics, and nesting software to offer our customers the best price. Part of custom die cutting is the ability to match our customers needs to what our machines and tooling can do.

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One of the advantages of die-cutting is the reproducibility of every cut. The part is made by the die, and the die is naturally stronger than the material itself, so it helps in producing a quality part over and over. The shape of the part is dictated by the rule of the die which stays in place due to the wood and the pressure of the machine that is being used. Nearly every cut is within a few thousandths of the last cut. One of the limitations of the steel-rule die is the tolerance. Steel-rule dies can be manufactured to hold a +/- .005” tolerance. However, it may be difficult to stay within that tolerance on a very complex part such as extremely thick foam materials or extremely dense materials.

Concavity, or hourglassing is a common phenomenon known to die-cutters. Luckily, NEDC offers a solution to this problem as well, (see Waterjet Cutting). It is also possible to hold a +/- .002” tolerance with a solid tool on select parts; NEDC provides solid tool cutting as well. Solid tools can have a prohibitively expensive cost if not cutting a lot of pieces. Die cutting normally offers a two-dimensional part (X and Y axis); it is possible to offer some parts as three-dimensional, through bends. This is rare but can be done with some rigid, thin materials. Die Cutting also offers the ability to “kiss-cut,” this is described in our article on “Kiss-Cut Parts“.

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It is possible to manufacture a die with more knife bent into the configuration to make more parts with each ‘hit’. This is done often when there are many parts required. It is also helpful when nesting the part may offer a more effective price structure for our customer. It is normal for the price to go up on the tool when there are more parts offered per ‘hit’. When we add more cuts per hit, we call the tool a higher “up”. For example, that die, is 10-up meaning with every hit, it cuts 10 parts. NEDC offers die cutting for quantities ranging from very high such as 1,000,000 pcs to 1 pc.

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NEDC now offers a large variety of high-performance materials that may be die cut. These materials include silicone, fluorosilicone, nitrile rubber, EPDM rubber, electrically conductive gasketing materials, thermal management, as well as many other types of materials (see our products list).  Some of the parts NEDC has the capability to die-cut are gaskets, thermal pads, epoxy preforms, and absorbers. Of course with custom die cutting, NEDC offers a wide array of materials to be die-cut.

Another bonus of modern custom die cutting is the ability to offer pressure sensitive adhesive on the back of parts with ease of removal. There are many types of adhesive backing that can be provided with a part. These tapes can be acrylic-based, rubber-based, or silicone-based. This oftentimes depends on the application. NEDC is an authorized converter of 3M. For that reason, we offer many different types of adhesives on the back of its parts:

• Thin Films such as Nylon, Mylar®, ETFE, PTFE, and DuPont’s Kapton®.
• Adhesives, such as the wide range 3M offers: VHB Tapes, Acrylic Transfer Tapes, Double Sided Tapes, and more.
• Fabrics such as Felt
• Thin Foils such as Copper Foil, Aluminum Foil and others.
• Aramid paper Products such as DuPont’s Nomex®

For more details on the materials available for NEDC to procure, see our Tech Blog.

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We thought since our main selling point is die-cutting, we would also present examples where conventional die cutting does not make sense. There are situations where die cutting does not make sense, such as mentioned above with concavity issues on thicker materials. Below we list a few reasons where it makes sense to hunt for alternative to die-cutting.

A. Its a thicker material. Concavity can be a concern with thicker materials. There are tricks of the trade to get around this to a certain degree, but ultimately it may be more wise to accept the material is too thick to die-cut.

B. Tolerancing. Tolerancing can be a tricky challenge, depending on the size of the part, and the cut-outs and tolerancing of those shapes, sometimes it makes more sense to move to another type of fabrication method, such as laser cutting, or waterjet cutting.

C. Many Cut-Out Shapes. There are times when literally hundreds of cut-outs are in a part. This can become tricky because die-cutting ultimately is a somewhat unbalanced manufacturing method. Two surfaces come together to force the die to burst through the material. For that reason, not all the surfaces perfectly burst at the same time. When many cut-outs are on a part, pressure, and getting a good part consistently may become a challenge.

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NEDC(New England Die Cutting) is a custom die cutting manufacturer in Methuen, MA with a 77,000 sqft facility. If you have any questions concerning custom die cutting or our die-cutting process please contact our Sales Team at sales@nedc.com.