The technical requirements for geomembrane engineering construction are very strict. The equipment of the geomembrane welding machine can provide very accurate and reliable welding quality in the most severe working environment.
Commonly used geomembrane welding machines include Plastic Welding Hot Air Guns, Plastic Extrusion Welding Guns, and Hot Wedge Welding Machine.
This article mainly refers to the Hot Wedge Welding Machine.
Here are the parameters and introduction of the QIVOC geomembrane welding machine!
What is a geomembrane welding machine?
The geomembrane welding machine is a kind of equipment specially used for geomembrane welding, which can provide accurate and reliable welding quality in severe working environments. Main welding objects: HDPE, PE-C, PP, LDPE. Rough surface geomembrane, anti-seepage membrane.
The working principle of a geomembrane welding machine is mainly to heat the bonding area of the geomembrane at a high temperature so that it melts and fuses together and finally forms a firmly welded joint. In addition, a geomembrane welding machine also uses high-frequency vibration and pressure to generate high temperature and high pressure between two geomembranes to achieve welding.
Geomembrane welding machines can weld a wide range of materials, suitable for various fusible plastic materials such as PE-HD, PE-LD, PE-C, PVC-P, PP, PFA, ECB, EVA, and TPO.
This machine is usually composed of a power supply, control system, welding platform, welding head, and protective cover. It has a mechatronic design, small in size and lightweight, suitable for field operation. The temperature control part adopts automatic constant temperature PID control, which has high control accuracy and a small temperature fluctuation range and can meet the welding requirements of geomembranes of different thicknesses.
Application fields of geomembrane welding machine
As a professional geomembrane welding equipment, it can be said that it is needed for welding work wherever geomembrane is used. Its application fields are very wide, and its main application fields are listed below.
Landfill anti-seepage membrane
Waste liquid drainage tank
Public works
Building foundation geomembrane
Tunnel waterproof membrane
Mine waterproof lining
Reservoir
Irrigation ditch
Dyke anti-seepage membrane
Aquaculture pond
Swimming pool lining membrane
Oil storage tank anti-seepage membrane
Chemical reaction tank
Sedimentation tank
. . .
Functional introduction of geomembrane welding machine
1. Electric heating system: The heating temperature of the electric heating wedge adopts closed-loop control, and the temperature can be adjusted continuously. Adjust the corresponding pressure position according to the thickness of the material for welding.
2. Welding pressure adjustment system: can achieve continuous adjustment.
3. Transmission system: adopts upper and lower pressure rollers to drive synchronously, and electronic step-less speed control. The automatic control system is equipped with a speed-measuring generator to adjust the welding speed to keep it constant, which is not affected by load changes. The power is transmitted to the transmission/pressure wheel through a three-stage planetary gear reduction.
How to use geomembrane welding machine
Using a geomembrane welding machine includes several steps such as preparation, welding, quality control, etc.
Let me introduce it in detail below!
You can watch the video first before reading the details
Preparation before welding geomembrane:
Prepare the equipment and materials required for welding: including welding machine, geomembrane, welding belt, cutting knife, etc.
Clean the surface of geomembrane: Make sure the surface of geomembrane is clean and dust-free. You can use a cleaning cloth or clean paper towel to wipe the surface. Make sure the welding surface is clean, dry, and free of impurities such as oil, dust, etc.
Cutting geomembrane: Use a cutting knife to cut two pieces of geomembrane into the shape and size required for welding, and the cutting surface should be flat.
Preheating welding machine: Pre-set the welding temperature according to the thickness of the geomembrane to be welded. The general temperature is between 250 and 350℃, and the specific temperature is adjusted according to the material and thickness of the geomembrane.
Geomembrane welding steps
Overlap geomembrane: Place two geomembranes on top of each other, with the overlap generally being 10-15 cm.
Fix geomembrane: Place the geomembrane on the welding table, align the welding position, and leave a certain amount of overlap.
Adjust pressure and speed: Adjust the pressure and travel speed of the welding machine according to the thickness and material of the geomembrane. The general travel speed is between 2m/min and 3m/min.
Welding operation: Place the overlapping part of the geomembrane into the fixture of the welding machine, and start the welding machine for welding. Pay attention to adjusting the distance between the upper and lower wheels to ensure that the two membranes overlap tightly.
PS:
For geomembrane welding, temperature control is extremely critical. Too high is easy to melt, too low is a false weld, and it must be accurately controlled at 220-440℃.
① Weld bead overlap width: 100~150mm; natural wrinkles on the plane and vertical surface are: 5%~8%; reserved expansion: 3%~5%; residual scrap: 2%~5%.
② Hot melt welding working temperature 280~300℃; travel speed 2~3m/min; welding form is double weld.
③ Repair method of damaged parts, manual extrusion welding gun as repair welding.
Geomembrane welding quality control
Temperature control: The temperature of the welding machine should be between 250 and 300℃. Too fast or too slow will affect the welding quality.
Pressure adjustment: The welding pressure should be moderate. Too large or too small will affect the welding quality.
Bottom flatness: Ensure that the welding ground is flat and free of foreign matter.
Common questions and answers in geomembrane welding
What is the most suitable overlap width?
The overlap width should be no less than 10 cm to ensure the anti-seepage effect.
Is it necessary to apply adhesive?
The overlap area needs to be coated with adhesive evenly to avoid leakage at the interface.
What should I do if the welding surface is not firmly bonded?
If the welding surface is not firmly bonded, you can adjust the distance between the upper and lower wheels of the welding machine, or increase the welding temperature appropriately.
Finally
QIVOC is a geomembrane welding machine supplier with rich experience. Our welding machines are very useful for welding HDPE geomembranes and HDPE liners. If you need to buy a geomembrane welding machine, please feel free to contact us for the latest price.
