Friday, September 14, 2018

Should I Repair or Replace My Hot Melt Parts?

When you have a part that has failed on your adhesive melter, a quick resolution is critical to minimizing downtime. Most often, there are two options: replacement or repair.

When you replace the part, you can sometimes lose value by discarding valuable components. To make the most of your hot melt equipment investment, consider having Keystone Industries repair or rebuild the non-functioning part where you can extend the life of your investment.

Benefits of Repairing/Rebuilding Your Hot Melt Equipment

While there are advantages to choosing either option, rebuilding has its own benefits. For example, this is often the more cost-effective option — the cost of repairing/rebuilding what failed on the equipment is often much lower than buying an entirely new part. With the cost savings, you can reinvest in spares, set it aside for equipment that fails the most often or save it for future needs.

If a new replacement for your existing equipment is no longer manufactured or in short supply, you could also experience less downtime by opting for repair. With lower costs and reduced wait time, why wouldn't you consider hot melt equipment repair instead of purchasing new if it is an option?

Keystone Industries also offers an exchange program for select parts if removing your existing equipment would cause downtime. To keep your operations going, we will send you rebuilt equipment in exchange for your non-functioning equipment.

What Hot Melt Equipment Can be Repaired/Rebuilt?

The following are some of the most common parts we repair/rebuild that can offer cost savings over buying a new:

  • Adhesive Melters
  • Applicator Heads
  • Circuit Boards (PCBs)
  • Modules
  • Pumps
  • and more.

If you have a part not listed above that needs to be repaired, please contact us to see if we can help.

Contact Us to Learn More

If you are considering a new replacement for an adhesive melter or parts for your adhesive melter, know there is another option. Keystone Industries services adhesive melters and parts for most leading OEMs. We know each job is unique and we give every project the attention and care it requires. Before we send repaired parts back to our clients, we ensure every product adheres to our strict quality guidelines.

To find out if we can repair/rebuild your specific adhesive melter or parts, call us at 800-235-8090 or contact us for a quick, no hassle answer.

Monday, March 19, 2018

How to Stop Hot Melt Adhesive From Smoking

While hot melt adhesives are an excellent solution for many industrial applications, the high temperatures of the process need to be carefully controlled to avoid problematic fumes. When hot melt adhesives are heated, they inevitably release some fumes. That is the odor you detect when working close to hot melt nozzles. While having some fumes is normal, excessive fumes suggest a problem with your process and require some attention.

Our team has seen examples of hot melt adhesive smoking and have some tips on how you can make adjustments to reduce the amount of smoking you have.

Check Your Process

To stop hot melt adhesive from smoking, take a look at your various hot melt process parameters:

  • Temperature: The temperature of your hot melt gun or nozzle is critical. Too low and your adhesive doesn't melt and flow properly. Too hot and your adhesive becomes too runny and can release annoying and irritating smoke. In some cases, burnt adhesive can discolor the final glue bead, and can also contribute to charring. Adjust your temperature setting according to the manufacturer's settings for your hot melt equipment as well as the manufacturer’s temperature recommendations for the specific glue you're using.

  • Orifice and mesh size: If the orifice size of your nozzle and the mesh size of your inline filter is not correct, you can have problems pushing your adhesive through and onto your products. An overly restrictive nozzle allows hot melted adhesive to back up and stay in the nozzle longer, which can lead to overheating. Verify that you have the correct flow through your nozzle at the indicated temperature and replace your nozzles and your inline filter assembly or filter cartridge if necessary. Our team can help determine if you have the right hot melt adhesive set up for your application.

  • Nozzle and work zone cleanliness: Adhesive residue buildup on your nozzles, in your applicator head and in the vicinity of your work areas can cause melt adhesive problems and smoking. An adhesive that has already been burnt and has dried will smoke more easily than fresh, unmelted hot melt adhesive. Accumulation of used, dried adhesive on your applicator head and nozzle is a common source of smoke.

While a small amount of smoking from your hot melt equipment is expected, if you are experiencing excessive smoking that causes eye or throat irritation, there are solutions. With years of experience as a leader in the hot melt adhesive market, here at Keystone Industries, we can help you understand why your hot melt dispenser is smoking. Always make sure that you are following manufacturer guidelines for your nozzles, modules and hoses as well as the glue that you are using.

Hot melt adhesives are suitable for a wide range of industrial applications, so get the most out of your system and avoid uncomfortable and annoying fumes. If you have any questions or need to replace any of your equipment, accessories or hot melt products, browse our catalog or contact our team for assistance.

Thursday, January 18, 2018

How to Stop Hot Melt Adhesive Stringing

Whether you’re using hot melt for packaging, automotive, print materials, or any other adhesive application, details matter. At best, inefficient use of adhesive can result in waste – at worst, it can cause issues with your system that add to costly downtime.

One of the most common issues encountered with hot melt systems is adhesive stringing. We’ve put together the following guide to help you understand what stringing is, how it happens, and how you can prevent it.

What is Hot Melt Stringing?

Hot melt stringing occurs when some of the adhesive material is left behind on the nozzle and pulled into a string, either automatically down the production line or manually when a handgun is pulled away from the applied surface. The string of adhesive that is left behind is sometimes called “angel hair”.

Hot melt stringing can affect any hot melt application, but it can be problematic for some in particular:

  • In food packaging applications, hot melt stringing can lead to pieces of adhesive breaking off and contaminating food products.
  • In pharmaceutical applications, hot melt stringing can break off inside packaging for medications, which could be mistakenly consumed.
  • In automotive applications, precision adhesive application on visible parts is an important part of ensuring a clean appearance for an automobile.
  • In Case and Carton closing applications , hot melt can appear on the product or case the product is put in.

What Causes Hot Melt Stringing, and How Can I Fix It?

There are various causes of stringing hot melt adhesive, including:

Application Temperature: When adhesive temperature is not high enough, the adhesive can become too viscous and thick, leading to stringing.

Solution: Consult your hot melt Material Data Sheet (MDS) to find the correct temperature settings. Standard hot melt adhesive is typically designed to be set at a temperature of 350° across all zones; however, your MDS may recommend a different temperature based on your adhesive & your application.

Late Shut Off: This is most commonly seen in older AO/SC module configurations, which can shut off slower than newer AO/AC configurations.

Solution: A support specialist at Keystone Industries is happy to help you determine if the age or configuration of your gun is a factor in your hot melt stringing issues.

Distance from Surface: If the distance between the nozzle and the surface is too great, this can allow air to cool the adhesive after it is applied, leading to stringing.

Solution: Try decreasing the distance between the nozzle and the application surface.

Nozzle Issues: The nozzle’s orifice diameter can contribute to stringing because of its effect on adhesive velocity.

Solution: Try replacing your nozzle. Keystone can help you determine what size could be a better fit for you.

Other potential causes: Over the years, we have seen a variety of different parts and issues contribute to hot melt stringing, including debris build up in hoses and other parts, solenoid issues prohibiting the proper cycling of the hot melt gun, and more.

Keystone is Here to Help

If you’re experiencing hot melt stringing, Keystone Industries can help you troubleshoot and get to the bottom of the issue. Simply call us at 770-586-5990 or contact us today.

Friday, December 29, 2017

Hot Melt Machine Rebuilds vs. Exchanges

When hot melt adhesive is part of your production operation, minimizing downtime is critical to the success of your business. Each minute of downtime means production setbacks, loss of employee productivity, and other issues, each of which can greatly impact your bottom line.

Inevitably, your hot melt machines will eventually experience issues that put you at the risk of downtime. Most of the time, getting your machine back into working condition will be more cost effective than buying a new system. But for many businesses, skilled local hot melt repair service technicians are in short supply, so the best option is to choose to a rebuild or exchange program for your hot melt system.

Which option is right for your operation? Let’s review the differences between rebuild and exchange to determine the best match.

What is A Hot Melt Machine Rebuild?

Our hot melt rebuild machine program allows you to pull your existing hot melt unit off the line and send it to Keystone, where it is rebuilt to like new condition and sent back to you for use. Before opting for a rebuild, ask yourself the following questions:

  • Do I have a backup unit to replace the hot melt system being rebuilt?
  • If no backup is available, can the production line run without the system while it is being rebuilt?
  • Does my current unit have all the features needed for my operation for the foreseeable future?

If you answered yes to the above questions, a rebuild is likely a great choice for you. If the final question regarding features is difficult for you to answer, speak to a customer support representative from Keystone – we’ll be able to help you determine whether upgrading to a new system will be a better choice for you in the long term.

View Our Melter Rebuild Options >>

What is A Hot Melt Machine Exchange?

Like the hot melt machine rebuild program, a hot melt machine exchange involves you sending your hot melt unit to Keystone, where we rebuild the system to like new condition. The difference with the exchange program is that Keystone sends you a rebuilt system, and you only send your system after receiving the Keystone system and install it on your production lineto replace the unit you are returning to Keystone. The exchange program is a great choice if the following are true:

  • You do not have a backup machine to run while waiting for your machine to be rebuilt.
  • Your production line cannot run without the machine that needs rebuilt.
  • The unit you currently use has the features needed for your operation through the foreseeable future.

Avoid Downtime with Regular Maintenance and Plenty of Spares

Each dollar you spend in maintenance and planning can save you exponentially in prevented downtime. Here are some tips to help keep your hot melt systems up and running, even when issues occur:

  • Keep multiple spares of commonly replaced parts for your system. Not sure which parts you’ll need to replace most frequently? Our customer service team can help you identify the most commonly needed parts for your hot melt system.
  • If budget allows, keep a spare hot melt system to swap out when you experience issues. This will allow you to run your operation with minimal issues while you get your machine rebuilt.
  • Complete regular cleaning and maintenance of your system. Check out our resources for helpful maintenance videos.

Have questions about your hot melt system? Contact us or call us at (770) 586-5990 to get quality replacement parts for your hot melt system at a fraction of OEM prices!

Monday, September 18, 2017

Types of Precision Nozzles for Nordson

For applying the right amount of glue in the right pattern every time, nozzle type and design mean everything. You can save time, money and glue by choosing the Nordson-compatible Keystone Industries precision nozzle that is best suited to your application. Take a moment to learn how to determine the correct nozzle type for your materials and process by understanding the different terms and nozzle specifications.

You don’t need to be an expert in industrial hot melt glue nozzles. That’s what we’re here for.

We’ll show you the difference between the various styles of nozzles so you can be confident you’re ordering the right nozzles for your business and adhesive application. Keystone Industries’ Nordson-compatible nozzles are built for precision and consistency and to offer greater control and durability than other nozzles you’ll find on the market, including many OEM nozzles.

Six Factors in Choosing Your Nozzle

Consider the following technical details when choosing your hot melt glue nozzle:

  • Pattern: Does your application call for dispensing glue in a bead, slot or spray pattern for adequate coverage and to ensure you get the glue exactly where it’s needed?
  • Number of orifices: Choose the nozzle with the correct number of orifices, ranging from one orifice for a single bead or spray to multiple orifices for multiple beads at the same time.
  • Style of gun: The style of gun relates to the control and positioning you need for your application. Your gun style will allow for certain types and styles of Nordson-style nozzles.
  • Nozzle angle position: The angle of the nozzle is in relation to the gun body. You can choose inline straight, multi orifice or 90° angles depending on the position & the amount of adhesive you require for your gluing.
  • Orifice diameter: Nordson nozzles range in diameter from .008” (small) for reduced adhesive flow and precision gluing to .040” (large) for greater flow and faster coverage.
  • Engagement: This is the length of the orifice channel, or the distance from the nozzle seat to the tip of the nozzle. Select a longer engagement if you want reduced adhesive flow but greater velocity.

When you consider all of these important points before ordering your nozzle, you’re giving yourself greater control over the volume, pattern and placement of your hot melt adhesive. This control means you’ll put the right amount of glue exactly where you need it for consistent and repeatable gluing for your manufacturing, packaging or installation applications. Choose the Keystone Industries precision nozzle for your Nordson hot melt equipment that improves the quality of your gluing process and ensures more reliable long-term adhesive bonds.

Need Help Choosing?

If you understand the six factors necessary for choosing the right industrial adhesive nozzle, you can browse our catalog and place your order today. If you’re not sure which nozzle suits your application best, we invite you to contact our experienced team here at Keystone Industries. Simply fill out our online contact form with all of your questions or give us a call and we’ll point you in the right direction.

We have hundreds of different nozzle styles, including 90-degree, domed, needle, pencil, single guards and spray. Tell us about your industrial gluing application — including information on your materials, throughput speeds, adhesive strength requirements and other process details — so we can help you select the perfect Keystone Industries precision nozzle for your Nordson adhesive equipment that saves you time, effort and money.

Friday, September 8, 2017

Which Nozzle Is Best for My Application?

Choosing the right hot melt glue gun nozzle goes a long way toward guaranteeing a clean and secure job. Your hot melt adhesive nozzle needs to be adapted to your industry, the materials you’re joining and the geometry and nature of your contact surfaces. Whether you’re seeking hot melt glue nozzles for carton sealing or another specific application, we’ve got you covered. Our team here at Keystone Industries can help you determine which nozzle is best for your application.

Depending on your industry and the type of gluing you’re doing, you can choose from:

  • Button nozzle: Single orifice brass nozzle that fits on Nordson H20 & Slautterback E100 Heads
  • Domed nozzle: Customizable multi-orifice brass nozzle suitable for case sealing
  • Domed circular nozzle: Used for sealing soda bottle base caps (circular pattern)
  • Extended dome nozzle: 1” long length to get adhesive deep into parts, suitable for automatic applications
  • Domed offset nozzle: These nozzles are available as single offset nozzles, which have one orifice at an angle offset from 0°, or dual offset nozzles, which have one orifice at 0° and another orifice offset at an angle for custom dispensing applications.
  • Domed SS nozzle: Stainless steel multi-orifice nozzle suitable for corrosive environments or high wear/contact
  • Handgun nozzle: Available in various lengths and orifice sizes for manual handgun operations
  • Needle SS nozzle: Commonly used to apply adhesive along a cardboard box seam and case closing
  • Pencil nozzle: Single orifice brass nozzle suitable for a variety of carton sealing applications
  • Short Pencil Nozzle: Single Orifice brass nozzle that give options for different flow rates of adhesive suitable for carton sealing applications.
  • Single guard nozzles: Button nozzle with integrated guard to protect the tip from box contact
  • Single SS nozzle (no guard): Durable stainless steel variant of button nozzle.
  • Spray nozzle: Dispenses adhesives in a swirl or spray pattern, for products such as diapers & certain product assembly applications
  • 90-degree nozzle: Popular nozzle for dispensing adhesive at a 90° angle for case and carton sealing

Understanding Terminology

When choosing your nozzles, it’s important to understand the different terminology used in the industry to make sure you’re choosing the right nozzles for your application. Consider terms such as:

  • Carton sealing: This popular use for a hot melt glue gun nozzle consists of gluing carton lids and tops, usually with a single line of glue (sufficient for low-weight cartons and products such as cereal boxes). Many customers choose pencil nozzles or 90-degree nozzles for carton sealing.
  • Case closing: Cases are made from thicker cardboard and often require more glue (thicker lines or multiple lines) for adequate sealing before shipping — heavier products will require more glue than lighter ones for adequate sealing. Optimal hot glue nozzles for case sealing include needle SS nozzles, right-angle 90° nozzles, and multi-orifice domed nozzles are popular choices.
  • Adhesive optimization: Too little glue can result in cartons and cases that open during transport, but too much glue costs you money. Optimizing your adhesive is important for the quality and reliability of your packaging as well as your profitability.

You’ll Find What You Need at Keystone Industries

If you know which tip for hot melt glue gun you’d like or require assistance choosing, check out our variety of nozzles. Compare the different types and select the model best adapted to your hot melt glue application. You can also contact Keystone Industries by calling 800-235-8090 for more information or to receive assistance with choosing. We’ll provide a free quote and ship your nozzles to you quickly, so you can get the benefits of the perfect hot melt glue nozzle for the gluing you do.

Thursday, August 17, 2017

Air pressure for Nordson ProBlue Melters

Pressure Gauges

If your pump is shifting erratically and/or the glue output is not up to par, check the following in order to reach maximum adhesive output:

  • Verify the factory's air is clean and dry.
  • Verify the air supply is capable of providing a maximum of 6.2 Bar (90 psi) of non-lubricated air.
  • Read the specifications on your specific adhesive and what is recommended.
It is suggested that an isolation valve be installed in the factory air supply line immediately before the melter.

Minimum operating air pressure is 0.7 bar (10 psi).  Operating at pressures lower than the minimum may cause the pump to malfunction.

Still having issues, please call us.

Angela Wagley