Tuesday, May 25, 2010

Deburring Cross Holes

Cross holes can be an issue for many machinists working with plastic materials. As a hole is machined into another hole, burrs will pop up once the tool is removed. While some CNC machines allow you to deburr right on the machine, most do not. Plus, these burrs are hard to reach and are at odd angles. This leaves a few options for finishing the parts and removing the burrs.

A typical method would involve several hand tools to remove the burrs. It would involve a lot of tedious work with a high level of finesse. These burrs are usually hunks of material that are not going to come out easy. Sometimes, parts like these will take up to 15 minutes deburr. Do you really want your employees spending 15 minutes deburring cross holes on parts? Wouldn’t it be better to send them somewhere where the parts can be deburred by a machine for less money?

Cryogenic deburring uses media as small as 0.006” to get into these hard to reach cross holes. Since the parts are frozen by the process, the burrs become heavy and are battered off by the media as it blasts through the part. We can get into holes that are 0.015” or larger.

To learn more about the cryogenic deburring process take a look at deburring process page. We would be happy to review some pictures or part drawings for you. Send information to rtaylor@nitrofreeze.com or call (508) 459-7447.

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Monday, May 24, 2010

Improve the Wear Resistance of Motorsports Parts

In the racing industry, it is not unusual to see a high level of wear in parts that are subject to friction. As the parts rub against each other over time a thin layer of material can be removed. This will result in less efficiency and in some cases lower horsepower and torque figures.

A piston moving up and down in an engine block will wear. This will eventually lead to blow by which will cause the engine to lose actual horsepower and torque. In racing application, this can be a big issue. Therefore, between races, wear items are fixed and or replaced.

Cryogenic treatment improves wear resistance characteristics. The amount of friction is reduced between the moving parts. This allows motorsport engines to keep their high rates of horsepower and torque. Blow by will be reduced and in some cases eliminated. This means that tuned cars will retain performance with age rather than see it dwindle over time.

For more information about what cryogenics can do for your racing parts, take a look at our cryogenics for racing web page. If you have any questions or comments, please call (508) 459-7447 or email rtaylor@nitrofreeze.com.

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Thursday, May 6, 2010

Plastic Flash Removal

Any plastic molder knows that as mold tools begin to age, flash will begin to form. Once flash begins to develop it will only continue to get worse with each time the tooling is used. Molders and end users typically have three choices to solve their mold flash issues.

1. Buy new molds at great expense to the customer.
2. Send parts to a deflashing service provider.
3. Remove the plastic flash in your facility by hand.

We know that most molds cost several thousand to tens of thousands of dollars. Many customers do not want to replace their molds because of the expense involved. In addition, it does not make sense to replace a mold if the product being manufactured is at the end of its product life cycle. Plus, there is significant downtime if the present mold is taken out of commission while the new mold is being made. Replacing molds typically is not the optimal choice for solving a flash issue.

There are many deflashing providers to choose from with various processes to consider. Our deflashing process is best for parts made of materials including plastics, polymers, nylons, rubbers, silicones, polyurethane, neoprene, liquid crystal polymer, urethane, viton, nitrile, butyl, DAP, ABS, PEEK, and aluminum zinc die cast and precision elastometric parts. Good candidates for our cryogenic deflashing process would typically fit in the palm of your hand. However, we have deflashed parts that are as small as a staple. For information on our plastic flash removal process, please visit our deflashing webpage.

Some plastic molders choose to have the plastic flash removed in their own facility. Some facilities have flash removal equipment including tumblers that use organic or plastic media. It is very common to see hand deflashing used in these operations. While the parts are coming off the mold, the operator will remove the residual plastic flash with hand tools in between cycles. Alternatively, after the entire mold run has been completed, several employees will sit around a table and deflash the parts by hand. This can be very time consuming and allows for inconsistent results.

If you are in need of a deflashing service to remove plastic flash then send us an email at info@nitrofreeze.com or call us at (800) 739-7949. We can review your application for deflashing whether it is in the form of part drawings, photographs or samples. Rather than have someone remove flash by hand; allow us to solve your deflashing issues with our efficient and cost-effective method.

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Wednesday, May 5, 2010

Remove Plastic Burrs Created During Machining

There are so many different ways to remove burrs created during machining. Many of the machines in manufacturing facilities around the world today are capable of removing burrs without ever leaving the machine for a secondary process. However, many small parts cannot have burrs removed on the machines they are made on. As a result, a secondary process has to be used to remove these small plastic burrs.

We are able to remove hairy, stringy, roll-over, flap, cross-hole and intersecting burrs. Our media is sized as small as 0.006” allowing us to gain access into small holes to remove plastic burrs. Parts made of materials including plastics, polymers, nylons, Delrin, Teflon, polypropylene, polycarbonate, ABS, PET, HDPE, PEEK, DAP, Tefzel, PPS, Viton, Torlon, CTFE and Liquid Crystal Polymer are great candidates for our deburring process.

Our cryogenic deburring process removes plastic burrs from machined parts. As a batch process, we are able to remove burrs from tens to thousands of parts at a time. This reduces the amount of time it takes to deburr each part. If it is taking your employees several minutes to deburr each part by hand then we can reduce this time indefinitely. Our fast turnaround around time of only two days after receipt allows us to get your parts back to you and onto your final customer.

Below is a picture of our cryogenic deburring system that we will use to remove burrs from your machined parts. This machine utilizes freezing, tumbling, and blasting small plastic media to remove the burrs from your parts.

If you are having burr issues with parts made of plastic and other materials, send us an email at info@nitrofreeze.com or call us at (800) 739-7949. We would be happy to review part drawings, photos of the part or even physical samples. For more information about our deburring process, please visit our cryogenic deburring webpage.

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