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Improved rubber parts

Posted: Fri Sep 18, 2015 2:50 pm
by Declan_Burns
I am currently working on the tooling to injection mould new quality trunnion seals that won't perish after a year like the one's currently available. The photo shows the holder with the core fitted and centred. This tooling fits my mate's injection moulding machine.

The rubber engine side cover seals on the market are a terrible fit. We have designed (CAD) and tested new ones and have already commissioned a batch of proper fitting water jet cut NBR seals for the side covers and for the rocker cover.
They will be available quite soon.

Regards
Declan[frame]Image[/frame]
The core for the moggy dust cap is centred and screwed into the holder[frame]Image[/frame]
Core[frame]Image[/frame]

Re: Improved rubber parts

Posted: Fri Sep 18, 2015 3:22 pm
by simmitc
Excellent news, well done. Those look like the seals for the upright. Will you be able to offer the ring ones for the fulcrum pin as well? Look forward to seeing the other parts too.

Re: Improved rubber parts

Posted: Fri Sep 18, 2015 3:39 pm
by Declan_Burns
Simmitc,
Yes, they are already on my workshop drawing.
Regards
Declan

Re: Improved rubber parts

Posted: Fri Sep 18, 2015 4:01 pm
by amgrave
I'll be interested in those when your ready. Thanks for your effort Declan, much appreciated.

Re: Improved rubber parts

Posted: Sat Sep 19, 2015 8:15 am
by jagnut66
Excellent stuff! :D
Will you be advertising them on here?
Best wishes,
Mike.

Re: Improved rubber parts

Posted: Sat Sep 19, 2015 11:07 am
by Declan_Burns
Not as such but I will mention a procedure. It will be my mate who will do the selling as I don't have a business. I just did the design work and made the tooling.

Regards
Declan

Re: Improved rubber parts

Posted: Sun Sep 20, 2015 11:27 am
by Declan_Burns
Here's a photo of the female part of the mould.
Regards
Declan[frame]Image[/frame]

Re: Improved rubber parts

Posted: Mon Sep 21, 2015 4:04 pm
by whyperion
Maybe do a bulk batch run and sell via club spares ? Or into the trade distribution channels ?

Re: Improved rubber parts

Posted: Tue Sep 22, 2015 6:15 pm
by Declan_Burns
Main mould finished this afternoon. Just needs to be milled/drilled for the injectors which is easy enough.
I will post up a shot of the first test piece which will be done in PVC and then we can try other rubber compounds-I hope all of this works! :D
Regards
Declan[frame]Image[/frame][frame]Image[/frame]

Re: Improved rubber parts

Posted: Tue Sep 22, 2015 8:00 pm
by bmcecosse
Moulding one at a time - it's going to be labour intensive....

Re: Improved rubber parts

Posted: Wed Sep 23, 2015 9:33 am
by philthehill
Declan
I am as much interested in the lathe as the seal moulding tool especially as it has a parallel bar bed and cross slide. Could you please tell me the make of the lathe and is it manual feed or a CNC unit?
Regards
Phil

Re: Improved rubber parts

Posted: Wed Sep 23, 2015 11:59 am
by Declan_Burns
Phil,
The lathe was built the at our company works in or around the 1950's. A trainee built it as a project for his master craftsman exam at the time. He sold it to me when he retired around 1984. I rebuilt it in the years following and changed a lot of things. It is not CNC, just manual feed but I can attach digital slide gauges. The chuck is made by Forkardt and is a precision unit. It is driven by a three phase ABB variable speed drive. The downside is that it has no provision for thread cutting. I have another small Proxxon lathe for that purpose.

Regards
Declan

Re: Improved rubber parts

Posted: Wed Sep 23, 2015 12:08 pm
by Declan_Burns
bmcecosse wrote:Moulding one at a time - it's going to be labour intensive....
Roy,
Probably not-my mate says it should only take approx. 30 seconds to inject, mould opens automatically , part removed, and then the next one.
As soon as he finishes his current production run we can test it but that could be a few weeks as he has an order from Deutsche Bahn (German federal railways) to complete.

Regards
Declan

Re: Improved rubber parts

Posted: Wed Sep 23, 2015 12:31 pm
by philthehill
Declan
Many thanks for the details on the lathe. It looks very good. I just wish I was that good at making engineering items.
My own lathe is quite a bit older - is German and was made by Oscar Ehrlich.
It has the capability to produce both Whitworth and metric threads if required though.
Phil

Re: Improved rubber parts

Posted: Fri Oct 02, 2015 1:33 pm
by Declan_Burns
The first batch of samples for the new nitrile seals for the rocker cover and the tappet chest side covers arrived yesterday. They are a lovely fit and we are quite pleased with them. We will test them over the weekend.[frame]Image[/frame][frame]Image[/frame]
Regards
Declan

Re: Improved rubber parts

Posted: Fri Oct 02, 2015 1:42 pm
by amgrave
Good luck with the tests, fingers crossed.

Re: Improved rubber parts

Posted: Fri Oct 02, 2015 3:46 pm
by biomed32uk
Certainly be interested in the rocker and side covers seals, had a nightmare getting the side cover seals to seal, about 4 tries in total I think.

As I have to rebuild the engine again following its self destruction they would be good to fit.

Good luck, keep us posted.

Re: Improved rubber parts

Posted: Fri Oct 02, 2015 8:32 pm
by rotgnom
Hi Declan,
great stuff.
If you need another A-Series engine to test Your products - here I am :D
See you as soon as I'm back from collecting those fitting kit for the T9 box.
Achim

Re: Improved rubber parts

Posted: Sat Oct 03, 2015 8:36 am
by Declan_Burns
Thanks,
Enjoy your holiday Achim-see you soon.
Declan

Re: Improved rubber parts

Posted: Mon Oct 19, 2015 12:02 pm
by Declan_Burns
Here's the mould for the sealing rings on the trunnions.
These are straight forward.

Regards
Declan[frame]Image[/frame]