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Help CenterWelding Machine for HDPE Geomembrane Seaming Machine
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welding machine for HDPE geomembrane seaming machine
*Geo-membrane welding machine can weld geo-membrane of various thickness 0.2mm-1.5mm
* For all thermal-fused material such as LDPE, PVC, HDPE, EVA, PP.
1. Technical parameters>>>
| Product | Welding machine/ hot wedge welder |
| Model | BPM 800 |
| Description | * Voltage (V): 220V * Frequency (Hz): 50Hz * Power (P): 800W * Welding speed (V): 0.8-6m/min * Heating temperature (T): 0-450°C * Thickness of material to be welded: 0.2mm-1.5mm * Overlap width: 100mm * Welding width: 12.5mm×2, interior cavity 12mm * Seam strength: ≥85% base material tensile resistant in shear direction * Dimensions: L32 x W15cm x H22cm * Net Weight: 4.8kg * Gross Weight: 8.5kg * Insulation class: class II |
.
2. Main Components>>>
3. Operation principle>>>
Motor drives upper and lower pressure rollers to rotate through reduction gearbox and chain. Slide carriages drive the hot wedge and insert it
between the two base materials, at the same time lever presses pressure rollers and engages the two fused base materials.
Pressure roller |
Spring strip |
Hot wedge |
Run direction |
Lower membrane |
Upper membrane |
Fig.4 Welding schematic diagram
4. Operating regulations>>>
As welding quality is direct related to speed and temperature setting during operating, so welding machine must be specified personnel operated
to reach excellent quality and high efficiency.
1). Use with grounded 3-cord mains cable and 3-hole socket with capacity not less than 10A (socket corresponds with welder plug, phase L connected
to live wire, N to zero line, phase to grounded protection line), confirm that external lines have been well connected. Check that power is on off state and
regulate temperature control potentiometer and speed control potentiometer to 0 position, press lever handle down to disengage pressure roller, then
insert the plug.
2). Turn on the power and select certain temperature and speed, take several narrow materials for try welding. Temperature selection may be different for
the same material at different ambient temperature and material thickness. To determine the best welding effect, adjust the speed to approximately 2m/min,
and then fine increase it from low to high temperature (approximately 250°C-350°C).
3). Judge on welding temperature: for transparent PE material, judge by direct observing, speed and temperature will be appropriate if welding mark is flat
and in transparent glass form; temperature will be too high and speed be too slow if mark is heavy broken; temperature will be low and speed be fast if mark
is not transparent and with white. For opaque material, observe if there is obvious welding mark, also tensile test can be made after complete cooling.
4). Flatly and straightly trim the weld edges and frontage faced, with lower left and upper right overlapped. The overlap width is 100mm.
5). After temperature and speed have been determined, insert material to be welded between the two pressure rollers, make machine body parallel with edges
of base materials and engage press lever handle for proper motion. Generally, only observation of deviation between welding mark and base materials is
needed for operator, and timely make correction on small degree.
6). When welding will be ended, timely press lever handle to disengage upper and lower pressure roller to prevent rubber wheel damage for long duration.
7). Excessive temperature high and low may occur because of thermal inertia. On this condition, temperature deviation may be compensated by speed regulation
on a small degree.
8). A “T” shape overlap is formed between welded material and another material. Welding method is shown as fig.5, tightly butt the overlap head of hot wedge
against weld mark, and beveling cut length is approximately 100mm.
Run direction |
Fig.5“T”shape welding diagram
5. General troubles and eliminations>>>
Motor not run |
Power off |
Check that the mains is in On condition |
Fuse damaged |
Replace fuse |
|
Speed control circuit board damaged |
Replace speed control circuit board or control box assembly |
|
Motor burned |
Replace motor |
|
Motor speed can’t be regulated |
Speed control knob is loosened |
Tighten speed control knob |
Power tube disruption |
Replace power tube or control box assembly |
|
Hot wedge do not heat |
Tubular electric heating element damaged |
Replace hot wedge assembly |
Thermocouple failure |
Replace thermocouple |
|
Temperature control knob loosened |
Tighten temperature control knob |
|
Temperature control circuit board damaged |
Replace temperature control circuit board or control box assembly |
|
Hot wedge is burned red |
Thermocouple failure |
Replace thermocouple |
Controlled silicon disruption |
Replace controlled silicon or control box assembly |
|
Chain jumping |
There may be sand or small stones on chain and gear |
Remove sand or small stones |
6. Maintenance
The complete machine should be cleaned, greased and placed in a dry place if it is not used.
For PVC welding, the adhesions on hot wedge should be cleaned off if it is not used longer than 4 hours to prevent wedge corrosion and service life being
shortened.
Recommend: for welding of material that corrosive gas may be produced after hot fusing such as PVC and the like, stainless steel hot wedge (optional
accessory) is preferred for extending of service life.
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