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WELDING OPERATIONS: 

There are three basic types of plastics welding with hot-air: 

Tack Welding, Hand Welding and High-Speed Welding.

TACK WELDING

Tack welding is a shallow fusion of the mating surfaces of 

the material.  It possesses little tensile strength. It holds the 

pieces together until the regular bead is welded.  Tack weld-

ing eliminates the need for clamps,  jigs and additional  

manpower. 

For practice welding, prepare the material as follows:  

1.  Take two pieces of 1/8” thick PVC sheets, each about 2” 

wide by 6” long.  Bevel one of the long edges of each piece 

to about 30º  for a total included angle of 60º.  Do not 

bevel to a feathered edge.   

2.  Remove all dust and chips.  Do not use a solvent.  This will 

soften the material and result in a poor weld.  

3.  Clamp one of the beveled pieces flat on a work bench with 

the bevel pointed upward.  Place the other pieces so that 

the beveled edges face each other.  Install the tacker tip. 

Hold the welder upright at an angle of about 80º perpen-

dicular to the surface of the material. 

 

4.  Hold the loose PVC piece firmly against the clamped piece. 

Touch the point of the tacker tip quickly but firmly along 

the mating surfaces, making short (½” to ¾”) tacks at inter-

vals of about 1 ½ to 2” along the joint.  

5.  Then draw the point of the tacker tip along the entire 

joint, fusing the edges together. This operation must be 

performed quickly.  Hesitation at any point can result in 

charred spots that must be removed before further  

welding.  The two pieces are now fused together with  

sufficient strength for handling.  

HAND WELDING

Hand welding can provide very high tensile strength, if  

properly accomplished. It is recommended for welding 

KT

KR

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Содержание PLASTICS Welding Equipment

Страница 1: ...eld The Best in Plastic Welding The Original PLASTIC WELDERS Made in the U S A Kamweld The Best in Plastic Welding Operating and Maintenance Instructions for KAMWELD PLASTICS Welding Equipment REV 022...

Страница 2: ...mperatures 3 Parts of a Welder 3 Kamweld Plastics Welders Models 4 How to Set Up a Welder 5 Temperature Chart 6 How to Disconnect the Welder 6 How to Change Heating Elements 6 How to Disassemble the H...

Страница 3: ...ops both indoors and outdoors WELDING TEMPERATURE Most thermoplastics are weldable between 572 F and 752 F 300 C and 400 C when hand welding using the models such as KR and KRL or hi speed welding usi...

Страница 4: ...stics with speeds up to 60 1 524 mm per minute depending on the diameter of the rod The standard stainless steel heating element is rated at 600 watts It oper ates on shop air or insert gas MODEL 44 A...

Страница 5: ...chart on the following page It is essential that either air or inert gas flows through the welder at all times from warming up to cooling off to prevent burn out of the heating element and or further...

Страница 6: ...ement reverse the above procedure Turn the element clockwise about 1 turns while pushing the wire gently back into the handle This prevents kinking of the wire dur ring reinstallation To reinstall the...

Страница 7: ...in a poor weld 3 Clamp one of the beveled pieces flat on a work bench with the bevel pointed upward Place the other pieces so that the beveled edges face each other Install the tacker tip Hold the we...

Страница 8: ...ain enough pressure on the rod so that the softened end of the rod presses into the softened surface of the material Flow lines see Figure 3a will appear on sides of the rod A small wave of softened m...

Страница 9: ...8 When the weld is completed cut the rod off close to the base material with a knife or a pair of cutting pliers Inside Corner Welds Outside Corner Welds Double V Butt Welds Edge Welds Single V Butt W...

Страница 10: ...faster and more uniform operation Once started the rod is fed automatically into the preheating tube by the motion of the welder being pulled along the joint The Kamweld high speed tools automatically...

Страница 11: ...b Bring the welder quickly to an upright position and push down hard with the point of the shoe This action cuts the rod at the end of the weld The remaining rod is pulled out of the tube by hand see...

Страница 12: ...ts products or their suitability or fitness for a particular purpose or use Kamweld shall not be held liable for any damage to person or property resulting from any breach of this warranty nor be resp...

Страница 13: ...thermoplastics 1 4 round rod KST 2 For triangular PVC rod equivalent to 3 16 KST 2C For triangular polypropylene rod equivalent to 3 16 KST 3 For triangular PVC rod equivalent to 1 4 KST 3C For trian...

Страница 14: ...T and model 42 TM KHAG The KAMWELD Hot Air Gun is supplied complete with an air regulator and pressure gauge a 2 long 5 8 diameter stainless steel flanged round tip with check nut and 5 of insulated c...

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