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Main Boards => The Bowyer's Bench => Topic started by: Appalachian Hillbilly on December 11, 2021, 11:44:10 AM

Title: How many clamps?
Post by: Appalachian Hillbilly on December 11, 2021, 11:44:10 AM: Almost ready to glue up a 17" riser. I have to go get c clamps because all my clamps have plastic and I am afraid they will not last in the curing chamber.
How many clamps are needed for sufficient pressure?

3 piece riser...
Title: Re: How many clamps?
Post by: Pat B on December 11, 2021, 12:24:42 PM: I've never built a riser but I think adding pressure strips(metal or wood), top and bottom should eliminate too many clamps but what do I know. :dunno:
Title: Re: How many clamps?
Post by: Crooked Stic on December 11, 2021, 12:28:14 PM: If it is straight cut pieces 3To 5 clamps
One in center and each end. And if ya want piece of mind one between the others. About the same on curves just need no gaps.
Title: Re: How many clamps?
Post by: Bvas on December 11, 2021, 12:36:02 PM: I would say at least five. Three to press the pieces together and two for blocks to keep the pieces from sliding side to side.
Title: Re: How many clamps?
Post by: Mark R on December 11, 2021, 12:37:39 PM: I do what Bvas stated
Title: Re: How many clamps?
Post by: Shredd on December 11, 2021, 12:43:32 PM: If you are gonna buy 3 clamps, you better buy 30... :thumbsup: :laughing:
Title: Re: How many clamps?
Post by: mmattockx on December 11, 2021, 01:20:22 PM: Quote from: Shredd on December 11, 2021, 12:43:32 PM
If you are gonna buy 3 clamps, you better buy 30... :thumbsup: :laughing:

+1. There is no such thing as too many clamps. I agree with Bvas's estimate for a riser, 5 should work OK if set up properly.

This is my last bow glued up on the form, with 2"x1/8" aluminum pressure strips. Roy uses a similar number of clamps on his trilam bows:

(https://i.imgur.com/ZT9XCfH.jpg)

Mark
Title: Re: How many clamps?
Post by: Jeff Freeman on December 11, 2021, 03:44:31 PM: Riser being glued up behind the tip,in the bench vise with clamps. Don't tighten to much. JF
Title: Re: How many clamps?
Post by: Buemaker on December 11, 2021, 03:54:01 PM: Can never have too many.
Title: Re: How many clamps?
Post by: Flem on December 11, 2021, 05:44:55 PM: One.
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Title: Re: How many clamps?
Post by: Appalachian Hillbilly on December 11, 2021, 10:07:13 PM: Flem that is cool!

I have a design that needs to be done in 2 stages. Does the first round have to be heat cured or can it be heat cured all at once .

Also, if it has air cured for 24 hours, can it be heat cured without the clamps?
Title: Re: How many clamps?
Post by: Jeff Freeman on December 12, 2021, 09:16:57 AM: I use smooth on, for my riser layups. No heat cure. Never had an issue. JF
Title: Re: How many clamps?
Post by: Appalachian Hillbilly on December 12, 2021, 09:37:16 AM: Jeff, how long do you leave them clamped?
Title: Re: How many clamps?
Post by: Jeff Freeman on December 12, 2021, 10:18:20 AM: 12-24 hours pending on room temperature. Until the glue is hard. JF
Title: Re: How many clamps?
Post by: Mad Max on December 12, 2021, 12:47:55 PM: I would buy Bar clamps, 12" would be good.
You can't have to many :thumbsup:
Title: Re: How many clamps?
Post by: Appalachian Hillbilly on December 12, 2021, 08:04:39 PM: I found some heat...don't tell the wife.
Title: Re: How many clamps?
Post by: Jeff Freeman on December 12, 2021, 08:16:28 PM: That'll work. Catch the drips or your busted. 😲 JF
Title: Re: How many clamps?
Post by: Appalachian Hillbilly on December 12, 2021, 08:27:27 PM: It had setup somewhat. :biglaugh:
Title: Re: How many clamps?
Post by: Jeff Freeman on December 12, 2021, 08:34:13 PM: You will be working on it tomorrow 👍
Title: Re: How many clamps?
Post by: Flem on December 12, 2021, 08:36:31 PM: 1hr cook time
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Title: Re: How many clamps?
Post by: Appalachian Hillbilly on December 12, 2021, 08:42:41 PM: Wife is out of town for 3 days...plan is to sand that down and it will be the middle accent for my riser. Then I will be banished back to the shop. Got to get my heat box built.