for those not on Facebook... FanRC injection molded parts rolling out

General discussion, builds/restorations, etc...

Moderators: scr8p, klavy69

rctenracer
Approved Member
Posts: 1281
Joined: Tue Dec 30, 2008 8:02 am
Location: michigan
Been thanked: 89 times

Re: for those not on Facebook... injection molded parts rolling out

Post by rctenracer »

Why is there a Hex Hole in the caster blocks.

User avatar
TRX-1-3
Approved Member
Posts: 1784
Joined: Sat Mar 29, 2014 4:13 pm
Location: USAG Humphreys, South Korea
Has thanked: 1453 times
Been thanked: 790 times

Re: for those not on Facebook... injection molded parts rolling out

Post by TRX-1-3 »

rctenracer wrote: Sat Jul 08, 2023 8:30 am Why is there a Hex Hole in the caster blocks.
Dude, nice eye-spy!

Would that align the pin better? Fewer contact points/less friction? Oversight or just plain "mistake"? 🤔
Hope you're doin' something fun.

User avatar
GoMachV
Approved Member
Posts: 11432
Joined: Mon Apr 30, 2012 2:31 am
Location: Twin Falls, ID
Has thanked: 856 times
Been thanked: 2590 times

Re: for those not on Facebook... injection molded parts rolling out

Post by GoMachV »

He answered this on his post by saying it reduces friction but i personally don't like it. It seems intentional since the pins used for the mold would be more of a hassle to make in a hex form than in a standard round pin. It's weird.
It's time to stand up to the bully. Support the companies that support the industry, not the ones that tear it down. Say no to Traxxas
Factory Works website

User avatar
MarkyDents
Approved Member
Posts: 1037
Joined: Sun Jan 10, 2021 4:52 pm
Location: Staten Island, N.Y.
Has thanked: 1412 times
Been thanked: 520 times

Re: for those not on Facebook... injection molded parts rolling out

Post by MarkyDents »

Looking at the pic with all the parts in it together it looks like it’s all based on a rere worlds, correct ?
Who do you race for ?
Me……. I race for me.
That’s impossible, I was told you need a sponsor to race.
Hey Cru ! Go balls out 8)

JosephS
Super Member
Posts: 1617
Joined: Thu Mar 23, 2017 9:31 pm
Has thanked: 1057 times
Been thanked: 488 times

Re: for those not on Facebook... injection molded parts rolling out

Post by JosephS »

I've got a set on the way. I'll post up pics and impressions when they arrive.


Or I'll be warning everyone about getting scammed. It'll be one of those.

mikea96
Approved Member
Posts: 3359
Joined: Thu Oct 01, 2009 8:34 pm
Location: Puyallup, WA
Has thanked: 235 times
Been thanked: 634 times

Re: for those not on Facebook... injection molded parts rolling out

Post by mikea96 »

I had bought some of there first yokomo molded parts and they were great!

JosephS
Super Member
Posts: 1617
Joined: Thu Mar 23, 2017 9:31 pm
Has thanked: 1057 times
Been thanked: 488 times

Re: for those not on Facebook... injection molded parts rolling out

Post by JosephS »

mikea96 wrote: Mon Jul 10, 2023 6:47 pm I had bought some of there first yokomo molded parts and they were great!
Were they similar to the original molded nylon or did they have a different feel?

mikea96
Approved Member
Posts: 3359
Joined: Thu Oct 01, 2009 8:34 pm
Location: Puyallup, WA
Has thanked: 235 times
Been thanked: 634 times

Re: for those not on Facebook... injection molded parts rolling out

Post by mikea96 »

They felt very similar to me and very nicely done.

User avatar
morrisey0
Super Member
Posts: 1357
Joined: Wed Jan 13, 2021 7:45 pm
Location: Richmond, VA
Has thanked: 56 times
Been thanked: 1339 times

Re: for those not on Facebook... injection molded parts rolling out

Post by morrisey0 »

JosephS wrote: Mon Jul 10, 2023 3:01 pm Or I'll be warning everyone about getting scammed.
The seller has a pretty solid reputation on the FB page. He has been selling there for awhile. I don't think getting scammed is going to be an issue.
I build RCs like people would have done back in the '90s ..................................... if they had 3D printers.

JosephS
Super Member
Posts: 1617
Joined: Thu Mar 23, 2017 9:31 pm
Has thanked: 1057 times
Been thanked: 488 times

Re: for those not on Facebook... injection molded parts rolling out

Post by JosephS »

morrisey0 wrote: Mon Jul 10, 2023 11:16 pm
JosephS wrote: Mon Jul 10, 2023 3:01 pm Or I'll be warning everyone about getting scammed.
The seller has a pretty solid reputation on the FB page. He has been selling there for awhile. I don't think getting scammed is going to be an issue.
I wasn't really worried about getting ripped off. I am mostly curious about the parts and materials used.

User avatar
jcwrks
Approved Member
Posts: 558
Joined: Wed Jun 21, 2017 7:40 pm
Location: San Angelo, TX
Has thanked: 134 times
Been thanked: 270 times

Re: for those not on Facebook... injection molded parts rolling out

Post by jcwrks »

Interesting how a small scale individual can release affordable injected molded parts, but both AE and RPM claim that it's way to expensive. What gives?
The TX SKUNK

mikea96
Approved Member
Posts: 3359
Joined: Thu Oct 01, 2009 8:34 pm
Location: Puyallup, WA
Has thanked: 235 times
Been thanked: 634 times

Re: for those not on Facebook... injection molded parts rolling out

Post by mikea96 »

jcwrks wrote: Tue Jul 11, 2023 1:47 pm Interesting how a small scale individual can release affordable injected molded parts, but both AE and RPM claim that it's way to expensive. What gives?
I was thinking the exact same thing.

User avatar
GoMachV
Approved Member
Posts: 11432
Joined: Mon Apr 30, 2012 2:31 am
Location: Twin Falls, ID
Has thanked: 856 times
Been thanked: 2590 times

Re: for those not on Facebook... injection molded parts rolling out

Post by GoMachV »

my understanding is (from RPM anyway) that it isnt that they cant run the old parts, it is that they cant afford to stop making new parts long enough to make the old parts. Their machines are busy, and pumping out new modern product makes them more money than pumping out a few hundred old parts and sitting on them. I heard the last time they ran RC10 buggy arms they sat on the product for quite a while.

People only want stuff when they cant have it. If AE dropped 1500 rere classics tomorrow, 95% of the people would wait till they were sold out and then complain about it.
It's time to stand up to the bully. Support the companies that support the industry, not the ones that tear it down. Say no to Traxxas
Factory Works website

JosephS
Super Member
Posts: 1617
Joined: Thu Mar 23, 2017 9:31 pm
Has thanked: 1057 times
Been thanked: 488 times

Re: for those not on Facebook... injection molded parts rolling out

Post by JosephS »

mikea96 wrote: Tue Jul 11, 2023 3:13 pm
jcwrks wrote: Tue Jul 11, 2023 1:47 pm Interesting how a small scale individual can release affordable injected molded parts, but both AE and RPM claim that it's way to expensive. What gives?
I was thinking the exact same thing.
It depends on how the molding tools are made.
RPM is set up to make very long lasting molds (tools) through a multistep process. They gave me a tour and explained some of what they did.

The tooling material is tool steel and can make 100k's to millions of impressions. As well it can withstand the pressure to make large parts and detailed of alternate nylon compositions. Tool steel is basically not machinable.

To put the pattern in the steel an electrode is made via cnc in carbon. From there the electrode and a tool steel blank are placed in an EDM machine. The machine basically uses electric current to evaporate parts of the tool steel. Details on this can be exacting. Basically air(gas) relief channels can be made in the material so thin that gases can escape, but no nylon material will. So there will not be air bubbles, bit as well no extra material.

After that the tool are sent somewhere else for the letter engravings to be added, basically the RPM logo.

The process is expensive and time consuming. It sounded like their cost would be in the 20+k range per tool. But they can make nearly millions of parts with out the risk deformation.

It was described to be the kind of presses that RPM have utilize such a large amount of pressure that only hard grade steel can survive. Aluminum would blow apart. It's many tons per square inch over the sizes that fit in their machines. The high pressure makes perfect, void free, parts over and over.

Basically tools never 'break' but they begin to produce parts that are not geometrically correct. Hence why tools have a listed life. The harder the material the longer it lasts.

What I am assuming that the process that these current parts are being made by is a low volume injection molding tooling. Depending on the size of the tool it can be made of steel or aluminum. The tool can be directly formed by a CNC machine. Parts are injected with a much lower pressure.
Tools like this can only be of smaller size, larger details and not especially complex.

You can only make a few hundred to many thousand parts per tool, with more parts possible where tolerances can be lesser. Stuff like suspension arms and mounts can likely be pretty far out before they become unacceptable. If you own the CNC mill it's likely easy enough to just make a new tool when complaints get to numerous.

I have feeling this is why none of these places are making transmission cases. The tolerances required for that would make it so only a limited number of successful cases could be made from low volume tooling before the tolerances would make them bind. If the press injection pressure isn't high enough it could be impossible to make a case that is ever close enough.

Given the limited run of the AE RE-RE the factory likely used a lesser steel for the stealth cases, ran the presses at a lower pressure to make the tooling last longer and ran the tooling longer than they should have for QC purposes. As much as everyone says they want AE to make more parts, RE-RE stealth cases are avoided by most here because the quality wasn't high enough. AE likely figured out that the cost to make proper tooling, even at the reduced quality, wouldn't make enough profit.

I was looking into low volume injection molding PA6/6 for RC10 parts to do my own run. Now that there are 2 sources for parts I am very glad I I didn't.

If we really want RPM to make parts we can flat out commission them to do so. We can pool money and pay upfront and they will make most parts.

JosephS
Super Member
Posts: 1617
Joined: Thu Mar 23, 2017 9:31 pm
Has thanked: 1057 times
Been thanked: 488 times

Re: for those not on Facebook... injection molded parts rolling out

Post by JosephS »

GoMachV wrote: Tue Jul 11, 2023 5:29 pm my understanding is (from RPM anyway) that it isnt that they cant run the old parts, it is that they cant afford to stop making new parts long enough to make the old parts. Their machines are busy, and pumping out new modern product makes them more money than pumping out a few hundred old parts and sitting on them. I heard the last time they ran RC10 buggy arms they sat on the product for quite a while.

People only want stuff when they cant have it. If AE dropped 1500 rere classics tomorrow, 95% of the people would wait till they were sold out and then complain about it.
I'd really like to see if we could start a kickstarter for RPM parts. Pre-sell the parts in prices and quantity so that it's known it'll be worth the time. If the project doesn't sell enough it closes down without any risk on the RPM side.

  • Similar Topics
    Replies
    Views
    Last post
  • RPM Ultra Molded T and B parts
    by JosephS » » in Temple's RC10 Tech Forum
    3 Replies
    638 Views
    Last post by jcwrks
  • Examples of why it's not feasible to injection mold yourself
    by mrlexan » » in R/C Off-Topic / Chit-Chat
    10 Replies
    1393 Views
    Last post by FasterLouder
  • FanRC Complete Graphite Worlds Kit (Slider)
    by morrisey0 » » in 21st Century Modern
    15 Replies
    886 Views
    Last post by 1911Colt
  • Shinwa Rolling Road
    by dinglem » » in Vintage Electronics
    4 Replies
    1214 Views
    Last post by bluewormx
  • Shinwa Rolling Road Instructions
    by dinglem » » in Vintage Catalogs / Instruction Manual Scans
    0 Replies
    1102 Views
    Last post by dinglem
  • Big Jim is rolling over in his grave
    by Erich Reichert » » in Vintage Electronics
    5 Replies
    987 Views
    Last post by mikedealer
  • Dynamic Models Suspension Car Rolling Frame Kit #102
    by RC10resto » » in Other Makes/Models
    7 Replies
    1098 Views
    Last post by romulus22
  • who's on facebook
    by GJW » » in Off-Topic / Chit-Chat
    11 Replies
    898 Views
    Last post by GJW

Return to “RC10 Buggy Forum”

Who is online

Users browsing this forum: No User AvatarCommonCrawl [Bot], No User AvatarGoogle [Bot] and 0 guests