Injectiweld


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Delivers Quality Welds
Injectiweld uses heat from the welding tip to pre-plasticize the welding surface of the thermoplastic. Molten plastic is immediately injected sub-surfacely under pressure, into the weld area to fuse the plastic together and form a sound weld. Since the orifice in the weld tip is submerged, surface preparation is not necessary and virtually no oxidation takes place during the welding process. The result is an efficient quality weld, produced without using hot air or gas.

Fabricating: Injectiweld is easily adapted into production and assembly applications. The one-hand operation of the Injectiweld allows the user to manipulate the parts to be welded with the other hand. The welder can then free form product for faster turnover and production.

Prototyping: Products can be designed and developed using the Injectiweld. The strong welds achieved using the Injectiweld lets welded prototypes be used in real life tests. The Injectiweld is capable of producing welds as small as 1.5 mm for inconspicuous welds and up to 15 mm for added weld strength.

Repair: The combination of heat and pressure from the Injectiweld produces quality welds on previously unrepairable parts, allowing them to be fixed and put back into service. The Injectiweld is utilized in various industries such as: materials handling, lining, transportation, safety supply, and custom repair.

Demonstration of Injectiweld repairing plastic holes applications.


Plastic puncture repair by Injectiweld tool video demonstration

Injectiweld repairing punctured plastic


Materials that can be welded with the Injectiweld
The following table lists materials commonly welded with the Injectiweld. While many thermoplastics are weldable with the Injectiweld, some resins have not been tested extensively and therefore do not appear on the following list. Note the weld temperatures are specific to the Injectiweld system.

Material Description Injectiweld Weld Temp in °C Injectiweld Weld Temp in °F
HDPE High Density Polyethylene 265 510
LLDPE Linear Low Density Polyethylene 265 510
HMWPE High Molecular Weight Polyethylene 280 536
PP Polypropylene 280 530
ABS* Acrylnitrile Butadiene Styrene 265 510
PS Polystyrenes 255 490
PVDF* Poly vinyl difouride 300 572
PA* Polyamide 6 (nylon) 300 570
PC* Polycarbonate 300 570
PU Polyurethane (thermoplastic) 300 570
Santoprene TPE Thermoplastic Elastomer 280 530
X-Linked PE* Cross-linked PE (See Special Treatment) 300 572

Model W30000 Injectiweld
Includes:

  1. W30000 Injectiweld
  2. Barrel Washer
  3. 3/16" Fillet Weld Tip
  4. Repair Tip
  5. Tip Nut
  6. Temperature Adjusting Screwdriver
  7. Tip Nut Wrench
  8. Extra Fuse
  9. Airline Filter Assembly
  10. Airline Filter Replacement
  11. Heat Transfer Compound
  12. Beveler, Scraper, Manual and Carrying Case


  1. T20007 Blank Tips 5¼" length, semi-finish tips used to design your own welding tip.
  2. T20008 Prototyping Tip 2" long. Used for prototyping and repairs where small welds are required.
  3. T20010 Repair Tip 1¼" long. Used for prototyping and repairs where small welds are required.
  4. T20003 Bull Nose Tip 1¼" long. Used for repairing blow holes in rotomolded parts. 1/2" diameter.
  5. T20001 Fillet Weld Tip 3/16" fillet weld tip used for butt and right angle welds. Part of original welding kit.
  6. T20004 Fillet Weld Tip 1/4" fillet weld tip used for butt and right angle welds.
  7. T20005 Fillet Weld Tip 3/8" fillet weld tip used for butt and right angle welds.
  8. T20011 Fillet Weld Tips ½" fillet weld tip used for butt and right angle welds.
  9. T20009 Ribbon Weld Tip Used for welding thermoplastic belting or sealing flat joints. 5/8" wide bead.

Stick Beveler/Scraper

Cleaning and beveling edge of repair with stick beveler

Tip preheats surface as welding bead is applied

After welding, excess is trimmed

Straight Scraper Blade finishes weld surface
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Weight: 5.95 lbs
Temperature Range: 220°C to 310°C (428°F to 590°F)
Fuse Rating: 120 Volt Model = One 4 amp Fast-Blow Fuse
Fuse Rating: 240 Volt Model = Two 4 amp Fast-Blow Fuses
Power: 120 VAC, 60 Hz, 400 W or 240 VAC, 50 Hz, 400 W
Air Pressure: 4 cfm @ 100 psi., clean and filtered
Plastic Rod: 4mm diameter


Butt Weld

Conical Weld

Repair Weld

Spot Weld

Materials that cannot be welded with the Injectiweld
Thermoset plastics
 are not weldable because they do not melt when heat is applied to them. Examples: F.R.P. (Fiberglass), Bakelite, Epoxies, Phenolics, Melamine, etc…
PVC-U/ PVC-P – PolyVinylChloride (Rigid / Flexible). The lowest temperature setting of the Injectiweld is too high for PVC-U or PVC-P. The material will burn inside the welder’s barrel. This will release chlorine gas, which is harmful to the operator’s health and will damage the aluminum parts of the welder.
PMMA – PolyMethyl MethAcrylate. Using this material inside the Injectiweld may cause the Piston Rod to become stuck. When PMMA is sheared, it exhibits very sharp edges around the circumference of the breakage. These sharp edges may prohibit the Piston Rod from moving backwards.
PFA – PerFluoro Alkoxy The weld temperature for this material exceeds the maximum temperature setting.
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Injectiweld Plastic Welding  Plastic Welding with the Injectiweld.

Injectiweld Spanish Manual  2.6Mb PDF

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