Improper routing and installation of a glue hose can shorten the service life. With a few simple steps, you can maximize the life of the glue hose, keep employees safe and keep your production lines running.
Proper hose length
For areas where hoses will be installed in a straight line, the length must be longer than the distance from port to port. As the hose is heated, the diameter increases to contain the force of the glue and the length will decrease. Some hoses have decreased in length up to 2 inches.
In this case, if the hose is too short and there isn’t enough slack, the hose fitting connections will be under stress, causing a possible leak. Even worse, a catastrophic failure of the hose breaking loose from the fitting could occur causing pressurized hot adhesive to flow.
On the contrary, too much slack can introduce new issues, such as, hose abrasion and snagging on other machine surfaces.
Proper bend radius
Adhesive hoses are somewhat flexible, but have bend radius limitations. The hose core, fitting crimps and electrical components can be stressed to the point of failure if the hose is bent beyond the maximum recommended bend radius. Call Keystone (800-235-8090) for your hose’s specific recommended maximum bend radius.
Regarding the fitting crimps and bending near the fitting, the suggestion is to keep the hose straight for twice the hose outside diameter. If the hose OD is ½”, keep the hose “straight” beyond the metal fitting for a minimum of one inch. If this is not possible, consider using 90 degree or 45 degree elbow fittings with insulator jackets to accomplish the angle needed without stressing the hose.
Avoiding hose twist
Metal hose cores in a glue hose have mechanical strain limits with regards to twisting. Tighten fittings using two wrenches or “double wrenching”; one to hold the fitting from twisting and the other to tighten the hose connection. To further prevent twisting, limit bending motion of the hose to a single dimensional “plane” when routing. A hose bending only left to right, only up and down or only forward and backward is moving in a single plane. Any combination of left/right, forward/backward, and up/down movement represents 2 planes of motion and all three represent 3 planes of movement. A compound bend can occur with multiple planes of motion and this can cause the hose to twist, since the hose ends are fixed and held tight. Try to limit routing to a single plane, but, if your application requires hose movement to cross multiple planes, ask a Keystone rep for a recommendation.
Abrasion and Attachments
Another cause of premature hose failure is abrasion of the outside hose cover, exposing insulation, wiring and possibly the hose core. Live wires being exposed is a safety issue and should be avoided at all cost. Use proper hose hangers and keep moving hoses from rubbing against other surfaces. Clamps, zip ties and any other restrictive attachments should not be used on hoses since they can press on the wiring and cause hot spots. These hot spots will cause untimely hose failures and could burn through the metal hose core causing an unsafe catastrophic failure.
By following these simple suggestions, you can maximize the service life of your glue hoses. Call or email (firstname.lastname@example.org) Keystone with any questions or requests for recommendations.
Keystone manufactures hoses for Nordson®, Slautterback®, ITW®, HMT®, Graco®, Valco/Melton®, Klebtec® and other hot glue melters for a fraction of the cost of the OEMs. Warranty provided is equal to OEMs.
Thursday, December 15, 2016
Tuesday, November 22, 2016
Where will you be on Thanksgiving - at your best hunting spot? In the quiet, trying to outsmart the elusive whitetail deer?
Where is the best shot location to drop a deer instantly? Best case is to prevent deer from running and scaring other deer, keep stress from toughening the meat, decrease suffer time, decrease harvest time.....so how do you do that?
It is all about the brain......click here for details.
Have a great hunt and Thanksgiving!!
Monday, November 7, 2016
Are you searching for ways to cut cost on your adhesive?
You may be able to go from a solid bead of glue to a stitch pattern and still have enough bite to pass the tear strength testing.
In order to learn more about the cost savings, click here for a free adhesive calculator.
Some people cut their glue spend in half!!!
Let us know if you need help with other cost savings, such as glue nozzles, modules, glue hoses, applicators, filters, etc.
Friday, September 30, 2016
Is your pump shifting too much?
Is the pump losing pressure?
You may have contaminants in the bottom check ball. Erratic shifting can be a symptom. Before you spend big money and buy a new pump, check this area first. You could save yourself a lot of money in downtime and not need to buy a pump.
See No. 18 & 19 below.
If you are continuing to experience issues, please contact us. We can provide free telephone technical assistance. We offer pump rebuild services also.
Friday, May 6, 2016
Tuesday, March 29, 2016
Hot - Do not touch!!
Did I say, "Hot, do not touch?"
Have you ever had molten adhesive on your skin?!?
If you have, "Hot, do not touch" is an understatement to you.
This first thing we want to do it wipe if off.....STOP, resist that urge because you will just spread the molten glue to more skin!!!! Immediately cover affected area in clean cool water. Seek medical attention for removal of glue to avoid deep skin removal.
First, let's take the proper precautions so we aren't put in that situation, eh?
Before working on any hot melting equipment, such as Nordson, Valco/Melton, ITW, Slautterback or even a small simple glue handgun, be prepared.
- Wear safety goggles
- Wear heat resistant gloves (click here for gloves)
- Wear long sleeve shirt or lab coat
Since glue machines are under pressure, be sure to turn off the pump pressure before removing any parts to avoid a burst of adhesive.
If you are purging a glue tank, please click here for a step by step video.
Keystone Industries, Inc.
Wednesday, March 23, 2016
When it comes to overseeing hot melt machines and their operators in a packaging environment, one of the most common problems we see is failure of parts due to improper washdown procedure. Anyone in the packaging industry knows that the cost of hot melt parts can add up significantly over time
Inexperienced machine operators, lack of education by supervisors, and improper part selection can all contribute to premature part failure, which can substantially add to the cost of keeping your production lines running. At Keystone Industries, we want to help you keep your hot melt machines running as efficiently and affordably as possible, so we took it upon ourselves to cover the most common topics surrounding washdown, and also talk about what the future holds for hot melt washdown.
The Importance of Washdown for The Packaging Industry
Many packaging and manufacturing facilities (especially in the food/beverage and pharmaceutical spaces) are required to wash down their machines regularly. This is to prevent bacteria and other harmful matter from contaminating the products that will be consumed by the end user. Washdown is also important for environments that experience large volumes of dust or small particles of packaging debris to ensure they do not interfere with proper function of the hot melt machine and equipment.
Two Common Problems Involving Washdown
Problem 1: User Error & Lack of Education
When it comes to electrical shortages from washdown, most problems are the result of one of two contributors: improper procedure by the operator, or an inadequate part. Most of the time, it is the former – inexperienced machine operators may not know which parts are resistant to water and which are not. Of course, there is the possibility that the operator may be properly educated, but may just be careless in their personal washdown routine. While some user error is inevitable in many washdown environments, proper education is the best way to combat this problem.
As a supervisor or manager of your production environment, it is extremely important to thoroughly walk through the washdown process with each new employee. Ask them to repeat important points back to you, and quickly quiz them on the procedure after you run through it so you can be sure that they were paying adequate attention and retained the information. If you notice parts fail that you suspect are related to improper washdown, observe the employee during their next washdown to be sure they are following proper procedure. A few quick moments of education and observation of procedure can mean significant savings on failed parts.
Problem 2: Lack of Washdown Hot Melt Parts
Aside from user error and education, the other main contributor to part failure is simply the part itself being inadequate. For environments where thorough washdown is required, using standard parts simply won’t cut it. Standard hot melt parts are typically very prone to electrical shorting when they come in contact with any amount of water, rendering washdown very difficult, if not impossible using these parts.
Choosing a washdown hose or applicator head can help avoid part failure due to electrical shortages. These hoses often feature a rubber sleeve or coating and a water resistant electrical connection that helps keep the electrical components of the part from getting wet. The glue heads have a silicone gasket protecting the inside electronic connections and a matching water-resistant electrical connector. This is a great way to protect your hot melt parts from peripheral droplets or spray that may be created during the washdown process. These parts may be slightly more expensive than a standard part, but the cost savings you’ll experience due to the longer part life is well worth the additional investment.
The Limitations of Washdown Parts
Washdown hot melt parts are a huge step in the right direction for those looking to avoid electrical failure of parts in a washdown environment. At the same time, it is very important to keep in mind that these parts have their limitations. Because washdown parts simply protect the electrical components, the components themselves are just as susceptible to electrical shortages as standard parts if those components come into contact with water.
In short, a washdown part is more water resistant than a standard part, but this does not make the part fully submersible in water. Any attempts to soak, dip, or submerge the part in water will likely result in electrical damage to the part, so your washdown procedures should strive to avoid including any of these methods. If you use parts manufactured by Keystone Industries and want to know if a certain technique is safe for the parts, feel free to ask us!
Your Source For Hot Melt Washdown Parts
Even if you follow washdown best practices and don’t experience electrical shortages of your parts regularly, you can still experience huge savings by choosing hot melt replacement parts from KeystoneIndustries. Our parts cost up to 70% less than OEM parts, and our friendly customer service is here to help with any questions you may have. But don’t take it from us! Read our testimonials to see what some of our current customers have to say, then browse our site for Nordson®-compatible parts at a great price!