It is Usually Always a Clog
The most common reason for your hot glue system acting up is because of a clog. Clogs are common because you are working with glue, which is sticky and chars over time. Below are some of the most common technical calls we receive, with the solution…and you guessed it, it’s usually always a clog.
Pump is not pumping
There are several reasons as to why your pump can stop up. Honestly, it is usually dirty oily air in your shifter. However, when it is not your shifter it is usually a clog. If your shifter is running fine, but it sucked something up into the hydraulics of the pump, the pump shifter will be stopped in the top position, unable to shift down. That is because you probably have some char or debris in your hot glue reservoir and while pumping, you sucked something up into the ball check valve. You have now clogged up your pump and need to send it in for a flush and clean. Another potential issue could arise if your pump is running but sluggish. If your pump is running mush slower than it used to, it is probably because you haven’t changed out your tank filter and it is clogged. The tank filter is located on the side of the tank and filters all glue before it runs into the hoses. If that filter is not regularly changed (every 500 – 1500 hours depending on how clean your glue is) then that clog can cause pressure to back up into the tank and not allow your pump to run at full capacity.
Gun is not firing
If your gun is not firing at all, it is probably your solenoid valve. However, if your gun is firing every other time or randomly, it is probably due to a clog in your in-line filters. The in-line filters filter the glue from your hoses into your gun. These filters are there to help filter our char or debris that was missed by the tank filter or that has built up in the heated hose. If the filter screens are not changed regularly, they will get clogged up and not allow for your gun to fire properly. For example, if you need to increase air pressure in order for your gun to fire, it is probably the in-line filter clogged up. Another clog can happen in the gun manifold itself. Typically, this is only in multi-module guns. If you have a multi-module gun and the last module in the line is not firing, there is probably a clog in the manifold.
Module Drips
If your module is constantly dripping glue, then you have a clog in your module. This is most common in air open, spring close modules. A piece of char will get stuck in the seat and not allow the piston to seal tightly, causing the glue to drip out. A clogged module will need to be replaced with a new module.
Nozzle keeps clogging
This one is fairly straight-forward. If your nozzles keep clogging there are a few solutions. First, you can change out your in-line gun filters. They are probably not clean and not filtering the glue through the gun. You can also increase your nozzle diameter. If you are running small hole nozzles such as .010 or .012 diameter, try a .014 or .016 and you will start to see less clogging. However, that will lay down a little more glue, so keep that in mind when reviewing your glue usage.
The best way overall to reduce the number of clogs in your hot melt systems is to do preventative maintenance. That means cleaning your tank every month or every quarter, depending on how many shifts your tanks are running. Universal Systems makes Purge Plus tank cleaner and we sell them in a 5-gallon pail so that you are set for at least 2 – 3 cleanings. Additionally, change out your tank filters and in-line filters. These 3 tips are the most inexpensive way to keep your hot melt system running smoothly.
How Dirty Air Impacts Your Pneumatic Systems
Pneumatic hot melt systems are run by air in both the pump and the applicator guns. One of the most important ways to ensure the longest run time out of any pneumatic system is to make sure that the air is clean and dry. That can be easier said than done. Most all packaging facilities have oil, water, or debris in their air. That is just the way it is. Some factories will install air cleaning systems and then add lubricators to lines to ensure that other equipment that requires oil runs smoothly. But even with the most expensive and elaborate air filtration system, there will always be some type of substance that gets by and can lead to issues in the pneumatic pumps of hot melt units. The simplest solution is to install an oil removal filter regulator to the air line running to the pump.
Oily air is our most commonly found issue inside facilities that have pumps stop up. The reason is because the shifters are manufactured with very specific tolerance clearance between the shifter spool and sleeve. This design is a necessity in order to get the pump to shift. Too much clearance and the air will just blow by the spool, never building up enough air pressure to pump. Too little clearance and the shifter will jam. That being said, if you have oily air or dirty air being run through the shifter, over time, that will cause a film to build up inside the shifter and cause a jam. Depending on the amount of oil or dirt in your air, and the number of hours the systems is run for, will determine how long this will take to happen. However, if you feel like your facility air is questionable, we suggest that you use the oil-removal filter regulator to prevent any shifter stop ups.
Another pump issue that can be caused by dirty or oily air is that it can get into the air motor and damage the rulon seals. The seals need to be tight to snuggly move up and down the air motor and if they get damaged by oil or dirt, that can lead to your pump not efficiently pumping. These seals can be replaced over time and should be checked every 2,000 hours.
Universal Systems offers pump rebuild kits for the seals, as well as sells the shifter valves in case you ever run into a pump issue caused by dirty, oily air. For more information on our pump rebuilding services, or for any technical support you might need, please call (561) 272-5542 or email sales@ussefl.com.
Under Pressure: How changing air pressure impacts your hot glue lines
Universal Systems manufactures pneumatic hot melt systems, which means that our equipment operates via air pressure. It is important to understand how air pressure can put stress on equipment and why the correct pressure points are essential to run a consistent, well-maintained hot melt system.
The way that a pneumatic hot melt system works is that an airline goes into the pump, to move the pump shifter, air motor and pump piston up and down to pump the glue from the tank, through the manifold, through the hoses, into the guns and onto the boxes. There is also going to be another air line into the guns to get the module pistons to open, apply the glue, and in some cases there will be an additional air line the air to close the pistons.
Let’s start with the air pressure to the pump. The air pressure to the pump is very important and should always be set between 20 psi – 40 psi, with an ideal setting in the middle at 30 psi. If your technician thinks the pump is running too fast and lowers the psi to under 20, then the pump might not have enough pressure to move the shifter. In most cases, a pump will run at as low as 18 psi. If your technician comes to you and states that the pump was running too slow, so they increased the air pressure to over 40 psi, that could cause damage to the seals inside the pump’s air motor. It is important to note that if the air pressure on the pump is set to 40 and the pump is still not pumping efficiently, then there is another issue at hand. Most likely there is dirty air inside the shifter or a clog in the tank filter. The air pressure should never be increased to fix other issues stopping up your pump.
The second air pressure point in your hot melt system is at the applicator gun. The air going into the gun should be set at a minimum of 60 psi. In most cases, 60 is the perfect setting for the guns. If your technician tells you they need to set the psi higher to get the guns to fire, then there is a clog in the in-line filter and that filter should be replaced. If the psi to the guns is anything higher than 80, you could blow a seal on the module and have issues with application.
If you have any questions about air pressure, please call us at (561) 272-5442 or email sales@ussefl.com.
Inflate Your Inventory, Not Your Budget
As we head into 2023, all Americans are impacted by the largest increase in inflation that we have seen in decades. With inflation comes several other economic impacts on society, including companies lowering budgets, changes in workforce, families not being able to afford bare essentials and many other challenges. With that said, companies still need to find ways to stay fully operational while staying within their newly defined restrictions.
Here at Universal Systems SE, we pride ourselves on producing high quality products at economical prices and have since 1981. All of our products are made in the USA and we keep almost every item in stock at all times. If you are having issues getting Nordson® products, or feel like the recent price increases from Nordson® aren’t allowing you to stay up and running at all times, please reach out to us. We will send you a quote within 24 hours.
The importance of “in stock” has never been more valuable. We realize that and are dedicated to continue to invest in stocking products so that our customers can get their most vital items in a timely and cost-effective manner.
For pricing on our most popular products, please reach out to sales@ussefl.com.
Universal Systems Plug & Play Machinery
With what some industry professionals are calling “The Great Resignation” driving the packaging industry, it is so important to have equipment that is easy to use and operate. Recent studies report that the labor shortages in the packaging industry are due to employees not returning to work after Covid-induced shutdowns, as well as the increase in quit rates with most new employees not lasting longer than a month. Food industry production lines are reportedly standing idle because of lack of staffing where processors specifically pinpointed high retirement rates. This is a hard reality for many CPGs, and consumers are seeing this direct result in our local grocery and retail stores.
With over 40 years of experience in the hot melt packaging industry, Universal Systems is here to help. We have worked with hundreds of new maintenance managers and plant managers to help them learn about the equipment they are running. Whether they are running a competitor tank with our USSE components or our ProBilt system, we have the skills and knowledge of both old and new equipment to help relieve some of the stress that many companies may be feeling due to the loss of their most experienced workers.
Many CPGs also cite a lack of skilled labor capable of operating and troubleshooting complex packaging machinery. This is why Universal Systems’ line of ProBilt equipment is the perfect match for these end users. Our ProBilt equipment is in fact plug and play, with the easiest controls in the industry and the most flexibility by offering up to a 4-hose capability on all tanks. While many of our overseas manufactured competitors spent the last five years releasing “upgraded” equipment, they have lacked the foresight to see that they have ultimately overcomplicated the machinery for end user operators. Universal Systems’ ProBilt tanks have not changed much in the last 20 years. We have continued to manufacture our easy to program Accuscan control board and standardized components that we have prided ourselves on. Here at Universal Systems, we believe in quality, longevity and sustainability. Our products have proved time and time again that they work hard, for a long time, and without much training needed.
In addition, CPGs have been requesting more online videos and tutorials to help them train their new workforce on the machinery in their packaging lines. Universal Systems has listened to this call and we offer videos online on how to set melter temperature, as well as how the setback functionality on our tanks work.
We are here to support all of our customers, both old and new, as they navigate through their workforce troubles. By stocking over 10,000 items, we also help keep our customers up and running so you don’t have to wait out long lead times for standard operating equipment.
For more information about Universal Systems and our line of ProBilt products, please reach out to sales@ussefl.com or call (561) 272-5442.
Mini Modules and Gun Applicators
Several Years ago, Nordson® introduced the MBII gun applicators and modules. Initially, the small module and applicator manifold was made for packaging lines that were designed with little room for glue application. Then, they started offering them in a low-profile design for case sealers. Over time, Nordson® started using MBII guns and modules as standard equipment on all of their packaging line set ups. Why? Even though it is not clear the need for the MBII in most standard application setups that have room for an H200, the price surely made it a much more profitable product in Nordson’s® arsenal. The MBII is more than double the price of a standard H200 module and gun applicator.
The key question to ask is, when do you need to use a MBII applicator versus a standard H200 applicator? Like we mentioned earlier, a MBII applicator is essential on packaging lines that have about half the space to fit an applicator than typical lines. Not only is the manifold about half the length and height of a standard H200 gun, the modules measure a mere 1” x 2” in size. Additionally, MBII applicators have the filter built into the manifold. This is a space saver because it eliminates the need for the in-line filter assembly off of the back of a standard gun into a hose. This allows for the MBII gun to attach directly to the hose and still be able to filter out all of the char and debris travelling through the hose and into the manifold. MBII guns also are air open, air close systems, so you can only run them if you have your line set up with two air lines running to the gun. MBII modules do still fit all of the standard H200 nozzle tips. So, even though you cannot use your standard H200 module on the MBII manifold, you can use all of your current stock nozzles.
If your new packaging line comes in with a MBII system installed, our recommendation is to measure the space where the applicator is mounted. If you have room for a standard H200 applicator and in-line filter assembly, you can always switch to a standard H200 set up. The only thing you will need to change out is the gun, filter assembly and solenoid. This will save you thousands of dollars in the future…but only if it fits.
For more information about the mini modules and applicators manufactured by Universal Systems SE, please visit https://www.ussefl.com/products/applicator-gun-heads/h201t-guns/#1544128561143-eeff57c6-9818.
How to Determine Heated Hose Length for Your Packaging Line
One of the most important things to consider when setting up your packaging line is the best length hose that you should use for both the top and bottom applications. While most maintenance managers think the longer the better, that is not always the case. Heated hoses should be treated with care to ensure durability and run time. At Universal Systems SE we recommend that you map out where the tank will be situated and then where the guns will be mounted. When setting up the top applicator line, make sure to account for hose mounting brackets and try not to make too many turns. The hose line should run as direct as possible to the applicators. We recommend that the hose mounts be hanging mounts for top applications. This will cause no kinks or damage to the exterior hose casing and ensure the long run life of the hose.
When setting up the bottom line, the hose should be mounted down the side of the packaging machine itself. You can use hanging mounts here as well. Make sure not to lay or run the hose on the floor. Also, do not coil the hose under the tank. If you have any leftover hose that you need to coil…your hose is too long. Running the hose on the ground and coiling the heated hose could cause a plethora of issues such as power shortages, heating issues or tripping hazards, all dangerous to your employees. Make sure to keep the area around the tank and hoses clean and hazard free.
The most common hose lengths sold are 6’, 8’, 10’ and 12’. However, Universal Systems does manufacture 2’, 4’, 16’, 20’ and 24’ hoses that we stock. Our biggest piece of advice is to take your time measuring and setting up the mounting brackets. This will ensure that your hoses will last longer and your packaging line will be as efficient as possible.
For more information on our USSE heated hoses, call a sales rep today at (561) 272-5442 or email sales@ussefl.com.
Help When You Need It
In the post-pandemic age of industry, every company is finding themselves in need of more help. Whether it is qualified technicians with experience in the field, or technical support and customer service from their vendors. A lot of large companies, like Nordson®, have gotten rid of their technical support and customer service representatives, replacing them with automated systems or remote sales reps that do not have a detailed knowledge of each customers purchase history or equipment needs. That is making it difficult for CPGs to troubleshoot issues or for new maintenance managers to know what to order.
Many line operators of hot melt machines are new to the industry, since companies saw their long-term employees retire during the pandemic. At Universal Systems, we not only stayed open and kept all of our employees during the pandemic, we have kept detailed reports of our customers purchase history, as well as a cross reference list of our products to Nordson®. We are always here to take any technical calls or offer Nordson® replacement parts when you need them. With the “supply chain shortage” impacting all Americans, we made sure to back our bets here at USSE. We have ramped up our inventory by double its normal size to ensure that you can get products when you need them and not be held hostage to overseas competitor parts. We make everything in the USA and use all US suppliers. We stand behind our products and feel certain that we would be able to help you with any issue that may arise with your hot melt equipment.
For any technical support please email tech@ussefl.com or call 561-272-5442.
Spring Cleaning for Your Hot Melt Systems
It’s that time of year again, when the days are longer and everyone is motivated to do some Spring Cleaning. That should also apply to your hot melt equipment. Like most machinery, your hot melt tanks, hoses, guns, filters and nozzles need regular preventative maintenance and cleaning. Below is the maintenance recommendation schedule that Universal Systems SE provides to all of its customers regarding our ProBilt line of products.
ProBilt Melters
- Replace tank filter every 500 hours or 3 months, whichever comes first
- Clean tank with Purge Plus every 1,000 hours or 3 months, whichever comes first
*stock 2 – 3 tank filters per tank and 1 Purge Plus cleaner
ProBilt Pumps
- Clean and Flush Pump every 2,500 hours utilizing Pump Service Kit B100-900
- Replace Pump every 5,000 hours or until Pump stops pumping
*stock at least 1 pump to reduce any potential down time
ProBilt Hose
- Flush out hoses when cleaning tank with Purge Plus every 1,000 hours
*make sure to disconnect hoses from guns when flushing with Purge Plus
*stock at least 1 hose per length needed to reduce any potential down time
In-Line Filters
- Replace every 150 hours
*stock 5 spare filters for each filter body
Gun Applicator
- Only replace when it stops functioning –either the heater or RTD
*stock 1 spare gun applicator per line
Module
- Replace module every 1,000 hours or every 6 months, whichever comes first
*stock 2 – 6 modules depending on how many modules are on each gun being used
Nozzles
- Replace nozzles every 120 hours or when they clog
*stock a minimum of 6 nozzles per line
*If you clean nozzles, we recommend cleaning them with kit # 1658 every 100 hours or when they clog
To keep your stock up to date please give us a call at (561) 272-5442. A USSE sales rep will quote you pricing and lead time on anything you need.
Glue Gun vs. Module vs. Nozzle
One of the largest misconceptions of hot melt packaging machinery is that maintenance on a glue applicator gun means replacing the entire assembly. That is not always the case. While sometimes, glue guns do need to be replaced, there are other times when a module or nozzle could be a cheaper solution to your problem.
What’s the difference?
It is pretty simple. The glue gun is the entire assembly (minus the nozzle). This includes the cordset, heating element, RTD, manifold and module. Essentially, if you order a glue gun, once you receive it the only thing you need to do is plug it in, attach the in-line filter assembly though the back fitting, screw on a nozzle and you are good to go. The reason to replace the entire gun would be if you get an error code on your melter main board that the gun zone is either not heating or not reading the RTD. If you get the gun zone heater error, that means that the heating element has stopped working and the gun needs to be replaced. If you get the gun zone RTD error, that means that the temperature can no longer be regulated and the gun needs to be replaced.
However, if you get no main board error code, but your gun is dripping or not dispensing glue at all, that could be a module or nozzle issue.
Modules are the mechanisms that attach to the front of the glue gun manifold to dispense the glue. These modules are operated by air and springs within the module body that control the piston to dispense the glue for easy release and clean cut off. If you are experiencing dripping, or no clean glue cut off, then most likely there is char in the spring that is holding the piston up and leaving the module open. Or, in some cases, the seals within the module could be stiff from usage and wear, and no longer creating the tight seal required for precision dispensing. In either of these instances, the module would need to be replaced.
If you are getting no glue at all to come out of the module, most likely your nozzle is clogged. The nozzle, or tip, is typically attached to the module and can easily be changed by screwing it off and on. In some cases, such as zero cavity or reduced cavity modules, the nozzle is fixed and can only be replaced by rebuilding the entire module, replacing the tip, piston and seals.
If you have any questions about which part of your glue gun you need to replace, please give us a call at 561-272-5442 or email sales@ussefl.com.