Monthly Archives: July 2015

What Finish Do You Need?

We’ve already talked about the benefits of powder coating over traditional wet paint and how setting up your own system can save you considerable time and increase your ROI. But what do you need to do now that you’ve decided to start your powder coating operation? Understanding what you are going to coat and what your powder specifications are will help you make the right decisions.

Determine What Type Of Powder Coating Finish Your Customers Want

When you start your powder coating operation, you need to know what performance specifications your customers require. This can be as easy as matching the performance of your current liquid operation or using the same powder as your current outsourced job shop. However, if you are in a highly technical industry – like supplying car or tractor parts – then there could be specification on salt-spray resistance, color retention, gloss loss, adhesion, flexibility, or hardness.

Here’s an example: If you powder coat parts for a larger manufacturer, that manufacturer may already powder coat and assemble some of their larger parts in-house. If you are, for example, supplying powder coated parts to John Deere, you will be using the same powder they use for their products. There might be no way to match their pretreat process, but you will need their powder specifications to make sure your parts integrate smoothly with their operation.

The Powder Specification Indicates What Equipment You’ll Need

The powder specification will provide you with a lot of important information, including powder thickness and cure times. This will tell you what type of oven (https://www.reliantfinishingsystems.com/powder-coating-equipment/powder-coating-ovens/) you will need as well as how much powder you have to apply. Is the thickness excessive? If yes you might need to pre-heat the part to get more powder to stick. The specifications should also say what type of pretreat process is required before coating. Iron Phosphate or Zinc Phosphate might be designated. Zirconium is also a common pretreat chemical that is used for multi-metal pretreating.

These specifications will dictate what type of pretreatment process you will need as well as what type of finish process your products will require. Once you have decided that, then you need to figure out how many you want to coat a day.

Choosing The Right Equipment For The Job

Your finish process is very dependent on the type of powder the finish specifications require and your coating equipment must be able to handle the workload in a quick and efficient manner.

For example, if you have to use a super-durable polyester baked at 385-400 F for 10-15 minutes, then you need an oven that is large enough and has enough power to cure the powder in an even and timely process. But if you are coating low cure epoxies, they only needs 8-10 minutes at 325 F for full cure. You wouldn’t need as powerful an oven to cure the epoxies as you would with the super-durable polyester.

If you plan on doing both, then engineer your equipment to the higher end. I always ask manufacturers to look five years down the road for their projected production requirements and possible finish improvements they would like to see.

Asking the Right Questions Before You Get Started

Ask your powder supplier for the curing and application specifics. This will help you decide on the basic system you would like to implement. Not all powders are the same though many are similar. Remember cure time is part temperature at cure time. The heating up of the metal does not technically count as cure time.

Your Process Decides Basic Equipment Selection

Once you know your proposed finish process, you can easily decide which equipment is right for you and your customers. Finishing can be broken down into three basic elements which help inform you on what sort of equipment you’ll be installing:

Metal Preparation – sand-blast, cleaning, solvent wiping, pretreating, and/or drying

Application – hand-spray, multiple coats, automatic spray, and/or possible priming

Curing – batch oven, conveyor oven, and/or IR oven

We have a lot to talk about in future articles, including pretreatment selection, powder chemistry and equipment selection, but suffice to say, having the finishing details first helps with the more expensive equipment decisions later.

Need help? Please give one of our systems specialists a call today, or check out our Resources page for more educational information on coating equipment, powder coating and more.

 

Bringing Your Powder Coating In-House

We’ve already covered many of the advantages powder coating has over liquid paint: how it can cost you significantly less and is more durable all while being a cleaner and safer process. This time we will discuss when manufacturers are outsourcing their finishing to a job shop and are deciding whether or not to bring their powder coating in-house.

Yellow Powder Coated Rims

Adding a powder coating line can help increase quality and reduce cost. (Photo courtesy of Espo’s Powder Coating in New York. Reliant equipment shown).

Getting Control Over The Finish

Every manufacturer I’ve worked with told me that improved quality was the number one reason for bringing their finishing in-house. This isn’t to say all job shops have poor quality, but they may not have the tight specifications that the manufacturer would like. Irregular thickness, adhesion problems, surface defects, gloss, color mismatch, and damage are all characteristics of outsourced coatings, and all of them create costly delays. For many manufacturers, adding an in-house line was easily worth the investment to control the defects from their outsourced partners .

The Costs of Outsourcing vs Coating In-House

As an example of typical powder coating costs, I looked at a large chain automotive parts retailer. To buy an uncoated wheel rim it costs roughly $50. For this same wheel rim, it costs $100 for a single color powder coat. For an exotic two-coat color (such as Hyper Silver) the wheel rim can reach $450. Granted the last wheel is far more stylized and the finish must be perfect, but the mark-up involved can be substantial.

Outsourced Cost: 4 Rims x $50.00 = $200.00 + Freight

In the above example, if brought in-house, the materials cost for doing a set of 4 wheel rims would be about 1 pound of powder. Say $7.50 a pound for a normal color. Pretreatment chemicals would cost about $0.50 per gallon of water. You would use approximately 2.5 gallons of water to clean 4 wheel rims, so $1.25 for chemicals. Well-insulated ovens have a gas/power cost of about $5-8 an hour, so let’s say $6.50 an hour. It only takes ½ an hour to cure the 4 rims, so energy cost of $3.25. Labor would be approximately $20 an hour and you could cycle 4 rims every 30 minutes, so $10 labor in 4 rims cost.

In-house Cost: $7.50 (1 lb of powder) + $1.25 (pretreatment chemicals) + $3.25 (Oven operating cost) + $10 (1/2 hour labor) =  $22.00 for all / $5.50 per rim

The total part cost for finishing in-house would be $7.50(powder) + $1.25(pretreat) + $3.25(oven) + $10 (labor) = $22 for 4 rims or $5.50 cost per rim. This is a rough estimate and doesn’t include all costs but if the wheel manufacturer was having their wheels painted somewhere else, the $50 cost versus $5.50 cost is significant. This example also only factors for a small batch of 4 rims; with a larger coating production run, the in-house cost goes down even further.

Manufacturers know their cost of outsourcing by how much they pay per part. But there are other costs besides raw production to consider. Shipping the part back and forth, packaging the part, inventory costs of parts coated and waiting to be coated, delay of available parts costs, and damage to parts are all factors when comparing outsourced to in-house coating.

Flexibility and Rush Delivery Favor In-House Operations

Often times manufacturers need a small parts run fairly fast to avoid costly delays. Whether you’re replacing something that may have been fabricated wrong, or a slip up on a pick list that they didn’t have the correct inventory, being able to fix these issues prior to shipping is valuable. Having the powder coating in-house allows for quick turn-around for these and other unforeseen issues. As we’ve already discussed, since powder coated items can be finished, cured and packed quickly, having the ability to coat in-house can save days of delay.

 Having your coating in-house is also instrumental for the research and development of new colors or new fabricating designs that you would rather keep private. This finishing flexibility allows for the experimentation with new technologies and improved quality processes that can give companies a competitive advantage.

Deciding When an In-house System Is Right For You

When deciding whether to install a new powder coating system in your operation, the real challenge is comparing all your costs to see if the benefits are worth the investment, labor and learning curve of developing a good finish process. Training and flexibility are very important when starting a new finishing process, as is setting realistic goals or expectations (though we can certainly help you get up to speed with your new equipment). Remember to keep a good relationship with your job shop vendor, since you may need them in the interim and if your finishing capacity gets maxed out.

Ultimately, if you are only coating a few things a year and don’t anticipate adding powder coating to your process, outsourcing can be a very effective way to handle your coating needs. However, if you’re already outsourcing a sizable amount of work every month and are concerned about cost, quality or delivery deadlines – or all three – it’s time to consider bringing you powder coating in-house.

Looking for additional information to help your purchasing and powder coating operation? Please check our Resources page.