Can you weld plastic with a soldering iron that doesn’t have a welding tip?

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NurturantQuasar

RCNT Basher
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My friends old trashed hpi rs4 MT has a cracked bit in the steering preventing it from steering very well. Gorilla glue and tape don’t work well. so I want to plastic weld it so me and him can go to the park nearby and have fun and so I can get his car and box of batteries and chargers out of my garage. I have seen plastic welding tips for soldering irons on amazon. Do I absolutely need one to plastic weld a small short crack? Or can I get by using the standard round tip that’s on it?
 

AClegg

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You can weld plastic, but it will not be very strong. In fact, as soon as you go to use it, it will break.

There are ways to make a mold of the part and melt down the old part to make the new part, but that would take more time and money than what it's worth to buy a new one. If price is an issue, check out Ebay. That's about the cheapest place you will find the part.
 

NurturantQuasar

RCNT Basher
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You can weld plastic, but it will not be very strong. In fact, as soon as you go to use it, it will break.

There are ways to make a mold of the part and melt down the old part to make the new part, but that would take more time and money than what it's worth to buy a new one. If price is an issue, check out Ebay. That's about the cheapest place you will find the part.
Alright then I’ll leave that up to my friend to fix if he wants to cause I'm not going to spend my money fixing it since it isn’t mine.
 

Racer 1966

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They actually make plastic welders( I have a professional Laramy plastic welder) that use super heated low pressure compressed air and a fine tip to focus it on small areas. It works well for many things but I am not sure a weld would hold up to the stress of steering. The problem is the original plastic parts strength comes from the fact that they are molded under high pressure to condense the plastic. The welder does does not have that ability and the other mold method mentioned has the same issue where a really strong part is needed.
 

Heisenburg

RCNT Talkaholic
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New England
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They have an old saying in automotive, that anything can be fixed, with enough money. Speaking as someone who still has his 1st, 3rd, 4th, 6th and 7th cars, that is good news, since I want to keep 1, 3, and 4 forever.
 

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