Make Auto Rubber Trim w/ Silicone Molds | Tutorial
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- เผยแพร่เมื่อ 27 พ.ค. 2024
- Part 2
In this video, we go through the process of re-creating a hard to find rubber trim gasket for a 1958 BMW Isetta. We go through the process of setting up a silicone mold, casting a flexible urethane, and give many tips and tricks along the way. We will cast BJB's F-130 High Performance Urethane Rubber to produce a part that looks as good as the original!
Shop our selection of cast urethane and silicones, or speak with our technical staff to help you pick the right one. We also have a huge selection of castable polyurethanes for making parts in the mold; from soft, flexible gels, tough rubber, on up to rigid plastics!
www.BJBenterprises.com
TC-5041 Silicone: bjbmaterials.com/silicones/pl...
F-130 Flexible Urethane: bjbmaterials.com/f-130-rv1-a-b/
6836 Black Pigment: bjbmaterials.com/pigments/ure...
UV-100 UV Additive: bjbenterprises.com/index.php/...
E236 Release: bjbmaterials.com/release-agents
Mixing Spatula: bjbmaterials.com/mixing-spatula/
0:00 Introduction
0:44 3D Model
0:55 CNC Machined
1:00 Bead-Blasted Surface
1:09 1-Piece Open Pour Mold
1:14 Double-Sided Tape
1:27 Sharp Hobby Knife
1:38 Center the Pattern
1:58 Ensure an Even Gap
2:03 Hot Glue Mold Box
2:13 Calculate Volume
2:29 Clean & Dust Free
2:34 TC-5041 Platinum 40A Silicone
2:58 Thoroughly Mix A&B
3:29 Bubbles Decrease Strength
3:33 Imperfections
3:39 Carefully Pour
3:52 No Mold Release
4:00 Level Mold
4:06 Remove Mold Box
4:11 Isopropyl Alcohol
4:19 Trim Flashing
4:25 Remove Meniscus (curved upper surface)
4:31 Sandpaper or Hobby Knife
4:37 Demold Silicone
4:55 E236 Urethane Release
5:00 Don't Flood Surface
5:05 Clean Level Surface
5:08 Straighten Mold
5:20 High Performance 30A
5:28 Choose the Right Material!
5:36 6836 Black Pigment
5:42 UV-100
5:54 Pre-Blend
6:06 Clean Container Lids
6:18 Double-Mix-Method
6:25 Vacuum Degass
6:44 F-130 Fast Working Time
6:49 More Material Speeds up Gel
6:56 Demold After 2-3 Hours - วิทยาศาสตร์และเทคโนโลยี
love it love it love it ! you have solved an unbelieveably big problem in restoring cars for me. Thank you good people !
Wow! This was really cool to see that you can make rubber castings as well, at home.
You definitely can not make this at home. This is all bullshit.
Amazing quality, I'll check out the condition on mine. Thank you..
This is exactly the video I’ve been looking for. Now I can repro dried and broken toy robot tires and treads.
Glad the video was helpful for you. Be sure to check out our other mold making tutorials.
BJBEnterprises I watched the video about clear and translucent parts too, I can finally make some red vintage Japanese robot fists. Haha
You guys are awesome I am chopping a 50 4dr buick into a pillarless hardtop with sucide rear doors ( like a 2000's pick up small rear doors ) and need custom gaskets now I got that figured out
I love this videos 👍
This is great thank you
excellent. I am trying to find or reproduce a rubber seal for a vehicle and this seemed to help me decide it can be reproduced. I do have the original but it has some cracks so im not sure if I can use it to make the mold. GREAT video!
Russ Feldbusch that is a great question. If you can find a way to make small repairs to the original (fill cracks with clay or bondo) then it may keep things simple. Sometimes though, you’ll need to make a new one using 3D printing or machining like the video and then you can make a high quality mold. If you need help, feel free to send our tech staff an email to show us the part. We are really good at guiding the customer in a practical direction vs just selling you products that aren’t needed. info@bjbenterprises.com
I need to copy a narrow wood moulding to make it so it will curve. The trim is around the countertop in my kitchen, and we made the deck side curve. We couldn't get the moulding to bend even with soaking and trying to score the backside. I think I need to make a silicone duplicate of the moulding and then make a flexible, paintable moulding out of that. Is this doable?
What would you use to create a gasket around the entire sunroof? Would silicone be good enough, it won't stick to paint and can be easily removed?
I'm watching this video because I realized I needed to make my own window seals for my 86 town car because no one reproduces it
I'm wondering, would it be able to cast a full rear window seal with this method/material. I need one for my car but they are close to unfindable.
Is it possible? Yes. Do you have the equipment and knowledge to make a mold that can cast flexible materials into? That's the key question. Building molds for one part is a very long and expensive route if you haven't done this before. The mold you see here was this customer's project after completing many others before this and having many failures along the way. We often recommend starting with a small, simple part first to learn the process before starting on a large, complicated part.
Question about 06:50, is there any way to ensure the cast is exactly the height of the mold? I imagine one way would be to pour an excess of resin and then go over the mold with a flat part to ensure the resin is even with the mold, but not sure if this would work or not. Two part mold would also work I guess but I would rather avoid that.
Also, what would the strategy be if there were one or more (through)holes in the part? Would it still be possible to use one part mold?
Hi There. You are correct, the easiest way to make a perfectly flat "top" is place a piece of plexi or similar on top (mold released) and slowly lay it over the exposed top of the mold. You would see some flashing around the edges as it's squeezed out. As far a holes, you can incorporate metal pins in the molding process. See our advanced mold tutorial here for that: th-cam.com/video/C7uMkBzOMaMh/w-d-xo.htmlttps://th-cam.com/video/C7uMkBzOMaM/w-d-xo.html
Even plastic hubcaps for cars manufactured since the 1980s can be reproduced.
RS 1990 Yes, many different parts from interior to exterior are made with the process. We have several customers that will also chrome plate urethane for trim.
Good video...now please make a follow up video how to make design a hollow weather striping used around automotive trim used in modern cars for window and truck deck lids
Typically that type of material is available for purchase. Many of our customers create special parts that simply don't exist anymore. Thank you for the comment.
@@bjbenterprises some gm old model have a complicated solid rubber molding that transition into hollow D shape then back into a sold rubber piece... Im looking to make such a custom mold as complete unit.
@@772777777777777 There are a range of urethane materials you might be able to use for that. The key issue is the tooling and molds. If you are new to mold making, this might take some serious engineering to achieve good results. Hard to give advice in a YouTUbe comment section, so if you have a serious project and need help with materials, feel free to contact our tech staff to see if we can help: info@bjbetnerprises.com
Отлично!)
Is it possible to color silicon in some specific color?
Yes. You need to start with a clear or non-pigmented silicone first and then add pigment.
Yes. If you want strong, bright or dark colors use clear silicone. If you want cream or pastel colors, use white silicone. If you want something in the middle like a khaki, light olive green, pale brown etc. Mix some white and clear silicone with your pigments. Let me give you an example with just the color red. Red pigment and clear silicone,=pure red. Red pigment and white silicone=pink. Red pigment and a mix of clear and white silicones=rose(which is a little darker thank pink). You might need to play with the white to clear ratio of your silicones. It all depends on how opaque your white silicone is. Hope this helps!
Could you mould car floor mats and create custom ones via this method?
Yes, we have had many customers make custom rubber floor mats with this technique.
Oh awesome what kind of rubber did they use to make it as close to an original rubber mat as possible?
@@paddeemusio typically most rubber mats are somewhere around 50-60 Shore D hardness. We have several products that could be used depending on the size and shape of the part.
@@bjbenterprises ah I see I wouldn’t mind molding some existing car mats and then customising them
hi i’m interested in making a part for a bike shifter/brake. it’s called a hood and is made of a soft rubber. it goes over the shifter. these are no longer made.
i’d like to attach a picture and see if someone could guide me on what would be the best product to use. the orem is a flexible rubber with a little stretch capability . it’s a little grippy but not sticky.
Bennett Marcel you would need to send pictures and description to info@bjbenterprises.com
If it possible materials replace by rubber crumbs from used tires
We do not specialize in those types of materials.
Haw to mke caoutchouc
_Overall an excellent video!_
_But it should be noted that a machined master from an outside supplier will be very expensive._
_Therefore, if cost is an issue, one should consider hand-crafting the master pattern from readily-available materials._
Thanks for your comment, that is very true. In this particular case, finding an original piece to take a mold off was not possible and the aftermarket parts available were terrible in quality. The individual here decided to invest into making an OEM quality pattern and subsequent parts. If he were to re-do a similar part or project, it would be more economical to simply 3D print a pattern (even in 2-3 pieces given the length) and hand finish to a high quality surface and make molds from there.
Would it be possible to order and buy such a Sunroof Rubber from you?
We are a raw material company. We do not make parts, we manufacture and sell the products you see used in this video. www.bjbenterprises.com
Where are the other videos about the Isetta restoration?
th-cam.com/video/WME8R2-Ot8E/w-d-xo.html
@@bjbenterprises only two? I love this car!
how to increase or desincrease the flexibility?
You will need to buy a different polyurethane product for casting. These casting materials are formulated to be specific hardness/flexibility. You can have a look at some of our different flexible polyurethane materials here: bjbenterprises.com/index.php/polyurethanes/castable/flexible/
I need you all to make me a mold for my convertible!
Make a Mercedes-Benz 190 rear lights
Why not just CNC the wood mold, and cast rubber in it? Does the mold have to be silicon?
Daniel Ziran-Xu there are several materials you can use for molds (metal, plastic, tooling board) but wood is not recommended unless you do a lot of work sealing, sanding, and smoothing the surface. Silicone is very easy to make molds for casting urethane because you can cast it against your model and capture the detail while not needing a lot of mold release (silicone is non-stick).
Just a little FYI: there is no such word as "heigth". The word is "height'.
We are tho thorry.
🏄🏄🔧🏃🏃🏄