Ethan Clarke
Flaring plastic tubing is a process used in critical fluidic applications for medical diagnostics, DNA sequencing, pharmaceuticals, and many other industries requiring precise, high-performance fluidic systems. To heat flare plastic tubing, you need to ensure the tubing is cut straight and deburred with a file. When flaring the tube, it is important to use lube on the flaring tool and the tube. For a 37-degree single flare, clamp the tube flush in the correct-size fixture, then centre the forming die on the tube. For a 45-degree double flare, clamp the tube in the correct-size fixture and set the depth by aligning the tube with the bubble flare die.
Characteristics and Values
| Characteristics | Values |
|---|---|
| Tool | Tubing flare set, tubing cutter, hacksaw, cutoff wheel, handheld flaring tool, hydraulic flaring tool, Rigid AN flaring tool, 32-tooth saw blade, tubing reamer, flaring tool kit, deburring tool, hand file, step drill bit, pop rivet, screw |
| Material | Plastic, stainless steel, mild steel, PVC, copper, brass, soft steel |
| Process | Cut, chamfer, deburr, flare, bend, anneal, tighten, align, centre, roll, heat |
| Angle | 37-degree, 45-degree |
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What You'll Learn
Use a heat gun to evenly heat the plastic tubing
When using a heat gun to evenly heat plastic tubing, there are several important steps to follow. Firstly, it is crucial to select the right type of heat gun for the task. For industrial applications, a gas or electric-powered heat gun, or one that uses a combination of both, is typically recommended. These heat guns often come with a fan tail nozzle that helps evenly distribute heat. If you are using a propane heat gun, ensure proper ventilation to avoid inhaling gas fumes.
Before starting the heating process, it is important to choose the correct size of tubing. The tubing should fit snugly over the item being heated. It is also essential to clean both your hands and the item being covered to prevent any dirt or oils from causing weak spots once the material is heated.
When using the heat gun, keep it moving to ensure even heating. Hold it at a distance where you can observe the plastic reacting to the heat. Adjust the distance as needed to control the amount of heat applied. Start with a low setting on the heat gun to gradually warm up the plastic. Keep an eye on the plastic, and once it starts to soften, stop heating before it reaches the melting point. The ideal temperature range for most heat shrink tubing is between 194°F to 248°F (90°C to 120°C), but always refer to the manufacturer's instructions.
To achieve a smooth and even finish, work slowly and steadily. Avoid rushing the process, as this can lead to uneven heating and potential burning or warping of the plastic. Always prioritize safety when using a heat gun. Never point the heat gun towards yourself or others, and only allow trained professionals to operate the tool, following the manufacturer's guidelines for safe use.
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Roll the tubing backward and forward under the heat gun
When using a heat gun to flare plastic tubing, it is important to understand the process and take the necessary precautions. Here is a detailed guide to rolling the tubing backward and forward under the heat gun:
Firstly, ensure you have the right tools and materials. You will need a heat gun, plastic tubing that snugly fits over the item being connected, and optionally, a coke bottle or something similar that is round and tapered. Before beginning, it is crucial to read the manufacturer's instructions for your heat gun and follow safety guidelines.
Now, you can start heating the tubing. Set the heat gun to the appropriate temperature for the material you are using. Remember that different materials require specific temperatures, so adjust accordingly. Hold the heat gun at a distance that allows for even heating, and roll the tubing backward and forward under the heat gun's nozzle. Keep the tool moving to ensure uniform heat distribution.
As you heat the tubing, pay attention to its pliability. You want the tubing to become soft enough to insert the fitting, but not too soft or melted. This process should be done gradually to avoid damaging the tubing or the project you are working on. Once the tubing is pliable, you can insert the adapter or fitting.
It is important to work slowly and carefully during this process. Take your time and ensure that the tubing is evenly heated and softened before attempting to flare it. This will help you achieve a successful and secure connection. Remember to wear protective gear, such as gloves, to safeguard your hands from the heat.
By following these steps and taking the time to understand your tools and materials, you can effectively use a heat gun to flare plastic tubing, creating secure and professional-looking connections.
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Choose the correct punch and die for the size of the tube
Choosing the correct punch and die for the size of the tube is crucial for a successful flaring project. Here are some factors to consider:
First, determine the size of the tube you will be working with. This includes knowing the outer diameter (OD) and the wall thickness of the tube. This information will help you select the appropriate punch and die set.
Punch and die sets come in various sizes to accommodate different tube diameters. Common sizes include 1 inch, 1.5 inches, 2 inches, and 2.5 inches. Make sure you select a set that matches the size of your tube.
Some punch and die sets are designed for specific tube materials. For example, certain sets may be better suited for mild steel, stainless steel, or aluminum. Choose a set that is compatible with the type of plastic tubing you plan to flare.
Consider the range of wall thicknesses that the punch and die set can accommodate. This information is usually specified in the product description. Ensure that the set you choose can handle the wall thickness of your plastic tubing.
Additionally, pay attention to the bolt size and strength. Some products may have issues with bolt stripping, so consider upgrading to a stronger bolt, such as a grade 8 bolt, to ensure a secure hold.
Finally, read reviews from other customers who have used the punch and die set for flaring plastic tubing. Their feedback can provide valuable insights into the effectiveness of the product for your specific application.
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Clamp the tube in a fixture to set the depth of the flare
To heat flare plastic tubing, you will need to use a heat gun. The pipe should be heated evenly by rolling it backward and forward under the opening of the heat gun until it becomes pliable. The pipe should be soft enough to insert the fitting. Before this, you will need to flare the pipe as the fitting will not fit into it.
To clamp the tube in a fixture to set the depth of the flare, follow these steps:
First, ensure that you have the correct flaring tool for the job. For a 37° Single Flare, you will need a flaring tool that does a 37° Single Flare. For a 45° Double Flare, you will need a flaring tool that does a 45° Double Flare. It is important to use lubrication on the flaring tool and the tube.
Next, clamp the tube in the correct-size fixture. The tube should be clamped flush, meaning that it is level with the tool. This will set the depth of the flare. The tube must be secured in a set of clamps while a cylinder with a tool comes forward and forces the tube to open up. The back of the clamps will have a matching taper that supports the outside of the tube.
Now, the forming die must be centred on the tube or the flare will be off-centre. The die is the "V"-shaped part of the flaring tool. Insert the die into place on the tube. The tail of the die will be inserted inside the tube.
Finally, turn the tool to create your flare. The V"-shaped die will start pressing on the die and creating a bubble flare. Once the bubble flare is complete, the double flare is completed by removing the die and forming the tube with the "V"-shaped die. This will create an inverted flare, which will complete the flare.
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Centre the forming die on the tube to avoid an off-centre flare
When creating a flare in plastic tubing, it is important to centre the forming die on the tube to avoid an off-centre flare. This process requires a specific tool, such as a flaring tool or a tubing flare set, which should accommodate the size of your tubing.
To centre the forming die, first clamp the tube securely in the correct-sized fixture. This will set the depth of the flare. Next, place the adapter inside the tubing. Ensure that the inside diameter of the tubing is properly radiused, with no sharp edges, as this is critical to the flaring procedure. Check that the end of the tubing is cut perpendicular and that any burrs or sharp edges are removed.
Now, centre the forming die on the tube. The die must be centred, or the flare will be off-centre. You can use the step on the die to set the height of the tubing. Project the end of the tubing slightly from the top of the flaring tool, about the thickness of a dime, and tighten the clamp bar to prevent slippage.
Make sure to use lubrication on the flaring tool and the tube. Once the forming die is centred, you can create the flare by striking the plunger with several light blows from a lightweight hammer or mallet. Turn the plunger a half turn after each blow and ensure it seats properly before removing the tube from the flaring tool.
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Frequently asked questions
You will need a flaring tool, a tubing cutter, and a heat gun.
You can cut the tubing with a hacksaw, cutoff wheel, or tubing cutter. It is important to cut the tubing straight and perpendicular.
Roll the end of the tubing backward and forward under the opening of the heat gun until it becomes pliable. Insert the fitting and flare the pipe.
Ensure the inside diameter of the tubing is properly radiused with no sharp edges. Use lube on the flaring tool and the tube. Clamp the tube in the correct size fixture and center the forming die on the tube.
