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  1. Nial's Avatar
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    Feb 7, 2015, 10:37 AM - Re: The Eighth Passenger #26

    DareDevil nice to see you have come along some more since my last visit. The teeth and inner jaws look great. Just for me and i know i am a little late but i too agree with the other guys about the joined fingertips. I myself much prefer them joined. This creature is so unique and bizarre looking i just think they suit it better. But ultimately of course it's your sculpture and you must do what pleases you. great work.
  2. daredevil665's Avatar
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    Feb 17, 2015, 8:04 AM - Re: The Eighth Passenger #27

    Nial said: View Post
    DareDevil nice to see you have come along some more since my last visit. The teeth and inner jaws look great. Just for me and i know i am a little late but i too agree with the other guys about the joined fingertips. I myself much prefer them joined. This creature is so unique and bizarre looking i just think they suit it better. But ultimately of course it's your sculpture and you must do what pleases you. great work.

    Thanks Nial of your participation,
    I'm doing tests to find the best value for money.
    Some quality can not be seen from the images, such as the strength, the weight and flexibility.
    I did make the entire tail, sintered. It is done in areas that fit through dovetail, with zero tolerance. Not even see the seam, except with the magnifying glass. It is amazing for the shape and definition, but it is too rigid. Handling it a little inexpertly may break. Then I could proceed in different ways, some of which are these:
    1) it totally by hand, as done previously, but I would avoid a lot of work even if the results are great for flexibility and robustness (and less expensive).
    2) do the sectors in rapid prototyping as the vertebrae of dinosaurs, to slip into an iron rod to give the curve, and keep them in line with references male-female.
    3) do rapid prototyping of the entire tail straight, and then make silicone molds to make the tail rubber, with drowned inside an iron rod to bend the tail at will. (the most expensive, but the most beautiful)

    Now I have not the pictures, because the parties are still displaced from the manufacturer.



    I'm trying to see if I can do the whole head, with movable jaws, rapid prototyping, but still I continue with the parallel street of the sculpture, which is always more exciting.
    The first thing to do is the mold for the transparent dome, which necessarily must be made in thermoformed. Just so you can adjust the differences of coupling between the head and the dome, which is with the CAD model with the sculpture.


    For the moment I attach a new proof of teeth-made PC-ABS. This is what I like the most, because it is strong and light. They are waiting for the release sintered. I'm filling the shelves of teeth.


    Greetings
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  3. daredevil665's Avatar
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    Mar 24, 2015, 10:12 AM - Re: The Eighth Passenger #28

    I lost a bit 'of time due to CAD modeling. Waiting for me to come for the parties, I enclose some pictures of the head progress, held together with tape. The shapes are provisional and will be amended or refined with polymer clay. I am waiting for the model made with rapid prototyping to create the mold matrix of transparent dome. This model is calculated without the expected thickness of 3mm of the dome. Will use this model to create two half-shells of glass fiber, in which particular synthetic gypsum to obtain a replica in extra-hard plaster, to achieve the dome thermoformed.









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    Last edited by daredevil665; Mar 25, 2015 at 7:38 AM.
  4. xenobiologist RPF Premium Member Leigh's Avatar
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    Mar 25, 2015, 6:14 AM - Re: The Eighth Passenger #29

    Looking real nice!!
  5. daredevil665's Avatar
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    Mar 25, 2015, 4:39 PM - Re: The Eighth Passenger #30

    Leigh said: View Post
    Looking real nice!!
    thanks Leigh,you're always a great support. It is not yet time for the deta2ils,but curiosity prevails and I'm feeling a bit 'as it may be. This is the version eyebrows that I like the most, with the lower lip seems typical of dogs.


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    Last edited by daredevil665; Mar 26, 2015 at 10:44 AM.
  6. xenobiologist RPF Premium Member Leigh's Avatar
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    Mar 27, 2015, 2:08 AM - Re: The Eighth Passenger #31

    I've found the lips to be particularly tricky to get anywhere near right, I think the biggest problem is that there were 3 different types used on the original.
    I ended up trying to achieve a look that captured features from all 3 types but then you also need to choose which features to use for best effect
    I'll be honest.... I'm still not 100% happy with mine but its nearly there

    Personally I'm not so sure about the frown! Having a frown gives him a personality....I don't think he's as scary with a personality, IMO he needs to show NO emotion!

    I'm not in any position to proceed with mine at moment so I'm very interested to see how your dome comes out. Your vac forming buck looks very similar to mine but you've included raised area's on the sides & ends, I shall be watching closely
  7. daredevil665's Avatar
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    Mar 27, 2015, 5:54 AM - Re: The Eighth Passenger #32

    Leigh said: View Post
    I've found the lips to be particularly tricky to get anywhere near right, I think the biggest problem is that there were 3 different types used on the original.
    I ended up trying to achieve a look that captured features from all 3 types but then you also need to choose which features to use for best effect
    I'll be honest.... I'm still not 100% happy with mine but its nearly there

    Personally I'm not so sure about the frown! Having a frown gives him a personality....I don't think he's as scary with a personality, IMO he needs to show NO emotion!

    I'm not in any position to proceed with mine at moment so I'm very interested to see how your dome comes out. Your vac forming buck looks very similar to mine but you've included raised area's on the sides & ends, I shall be watching closely
    Yes, in fact there are several versions of the front eyes, teeth and lips.
    Here are some:
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    I too am looking for an intermediate form. I do not think I'll do the moving lips as you realized you were in the video (nice work), because at the time I did not want to work too. Maybe later, more relaxed, when the bulk of the work could be dedicated only to this. Therefore, in view of a movable jaw, I thought to a form of the lips that could agree on both positions, open and closed. Therefore lip relaxed, which is typical of the position "MUSEUM", although it is very nice, it would not be the most appropriate for this purpose. With regard to the increased volume of the dome mold, place immediately after the perimeter outside the figure, it is to facilitate the release of the polycarbonate. As regards the rim carved out, visible in the image zooming, it serves to mark the end of the figure, to mark the visibility during the cutting of the polycarbonate.
    Last edited by daredevil665; Apr 24, 2015 at 6:26 AM.
  8. daredevil665's Avatar
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    Apr 24, 2015, 2:23 AM - Re: The Eighth Passenger #33

    Hello everyone.
    Finally came the sintered parts that I need to proceed.
    The first is the model to achieve the two fiberglass parts (left and right), I need to get the same shape, but in synthetic gypsum extra hard> 300 Brinell. This is the model of the transparent dome,which must be a bit stuccoed here and there.

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    The others are details of the head and jaw and mandible internal system. To these I will make the molds silicone rubber.
    Let me wishes, because my experience on the molds is zero!

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    While waiting for these pieces, without which I could not proceed to finish the head, I carried on filling the rest of the body.

    But times are getting longer, because the spring it also takes a bit 'of the gym to prepare for the mountain bike in the nature !!!

    See you soon!
  9. xenobiologist RPF Premium Member Leigh's Avatar
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    Apr 24, 2015, 2:49 AM - Re: The Eighth Passenger #34

    I'm really looking forward to your updates especially regarding the dome! I'm keen to see how the vac forming comes out, I may have to alter mine here & there

    Excellent work so far
  10. daredevil665's Avatar
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    Apr 24, 2015, 5:22 AM - Re: The Eighth Passenger #35

    Leigh said: View Post
    I'm really looking forward to your updates especially regarding the dome! I'm keen to see how the vac forming comes out, I may have to alter mine here & there

    Excellent work so far
    Dear Leigh,
    Thanks for your participation.
    To achieve this dome I had to find a compromise in the undercut, because in the previous ALIEN I had problems caused by strong undercut. The worker had to restrict the suction of the vacuum in the area of ​​the undercuts, closing the small holes of the intake (1.5mm diameter), with the consequent loss of curvature, not to break the dome during the extraction. So as not to lose all the bending, I decided to split it a little between the dome and the head, as seen in this image.


    Making the dome very thin, to have greater flexibility of plastic, it is very difficult, because the sheet departure remains constant in the thickness during the mold. Being the mold very long and high, the stretching is remarkable. I have considered to have 3mm thick in the coupling areas with the head, while in the center of the other part could be 1.5mm. In previous ALIEN, for 3mm, the worker went to a thickness of 5mm plate and had to pull it out when it was still hot, because the cold would be more difficult, with the risk of rupture.

    Below, we expose how will I get the mold itself.
    The sintered model you see in my previous comment corresponds to this image:



    On this model I am going to build a casting mold fiberglass, composed of two half shells, in which I will go to casting the synthetic gypsum to obtain the new robust model (25mm thick and 38kg).If the plaster mold should break, I can make another one because I have a fiberglass matrix.



    On this plaster model, I'm going to practice some holes, 1.5mm diameter, in the area of undercuts to increase the intake and adhere to the maximum thermoformed plastic model.

    See you next time.
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    Last edited by daredevil665; Apr 24, 2015 at 5:30 AM.
  11. xenobiologist RPF Premium Member Leigh's Avatar
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    Apr 24, 2015, 6:33 AM - Re: The Eighth Passenger #36

    Nicely done!
    yeah, a row of evenly spaced 1.5-3.0mm holes drilled just under the perimeter tube area to create more suction in that area. I've been thinking along the same lines as you & the buck needs to be hollow to achieve this.
    As I'm skint at the moment I'll let you go first
  12. daredevil665's Avatar
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    Jun 19, 2015, 2:49 AM - Re: The Eighth Passenger #37

    Hello everyone,
    work is progressing slowly due to the summer passions.

    These days I have fixed the system of rotation of the mandible. It consists of aluminum pins of 8mm diameter which rotate in aluminum tubes, inserted in the cheekbone area. Probably I put a small magnet to keep closed the jaw, or a spring that, beyond a certain point of rotation, can pull both opening and closing. In addition, small tires stop, to be seen whether or not the register stop.




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    See you next
  13. Nial's Avatar
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    Jul 7, 2015, 9:21 AM - Re: The Eighth Passenger #38

    Wow man it's been a while since i got on here to see how he's going and he is really going well. The video is greatly appreciated to be able to have a better look than just photos. Jaw movement is great and really smooth. Keep at it my friend he is looking awesome.
  14. daredevil665's Avatar
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    Jul 29, 2015, 9:30 AM - Re: The Eighth Passenger #39

    Nial said: View Post
    Wow man it's been a while since i got on here to see how he's going and he is really going well. The video is greatly appreciated to be able to have a better look than just photos. Jaw movement is great and really smooth. Keep at it my friend he is looking awesome.
    Thanks Nial,
    I'm restarting work after the holidays.
    Now I should start with the realization of fiberglass molds.
    I'll start with that to create the transparent dome.
    I have to create empty volumes for pouring the synthetic gypsum, so that, after pouring and having removed these volumes, will remain interior walls with rib feature.






    see you soon
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    Aug 3, 2015, 1:52 AM - Re: The Eighth Passenger #40

    Hello everyone,
    here is the modeling of the volumes to be extracted to obtain the ribs in the mold for the transparent dome.

    I probably will not have to finish them superficially, as it will clothe with Domopak aluminum to extract them easily, but I will simply reinforce them with a few rounds of tape.

    See you next

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  16. daredevil665's Avatar
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    Aug 8, 2015, 1:03 PM - Re: The Eighth Passenger #41

    Hello to all, Here I basted the frame to make the first half of the mold in fiberglass.

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  17. daredevil665's Avatar
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    Aug 10, 2015, 8:13 AM - Re: The Eighth Passenger #42

    Hello to all, To this mold not use silicone rubber. Use only fiberglass,because there are no undercuts. I plasticized with spray the separation area in MDF. So the wax for the posting will not be absorbed by the MDF. The black curve drawn on MDF,represents the limit of the lip which contains the keys coupling between the two shells of the mold. It is about 5 cm from the model. The keys are between them about 10 cm. The keys are made of stucco glass. I wanted to ask two pieces of information to those in the know:

    Are sufficient 5 cm (2 inches) of lip coupling?

    Sufficient number of keys stored in the picture?

    If you notice anything that might be wrong or not work,I'd be glad to hear it.

    Thank you in advance.

    See you soon.

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  18. daredevil665's Avatar
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    Aug 17, 2015, 3:04 AM - Re: The Eighth Passenger #43

    Hello to all,
    Here are the two half-shells made of fiberglass. I had never worked with fiberglass and now I can say I do not like, and I can realize the hard work that awaits me, if I want to do all the molds. However the result is satisfactory. To know how much gypsum and how much water will be used to get the printout, I combined the two half-shells with volumes polystyrene and I filled water that I later weighed. Knowing that one kg of gypsum is combined with 250 g of water and that the mixture occupies a volume of 0.6 liters, I know how much gypsum and how much water is used. The total volume is 29 liters, thus serving about 48 kg of gypsum and 12 lt of water. A small problem I found when I filled with water, was the infiltration of water into the coupling area. To avoid this problem, I thought to seal with wax.

    the polyvinol
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    the wax
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    the shells
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  19. xenobiologist RPF Premium Member Leigh's Avatar
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    Aug 18, 2015, 6:06 AM - Re: The Eighth Passenger #44

    Nice job! Neat & tidy
  20. daredevil665's Avatar
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    Aug 19, 2015, 3:00 AM - Re: The Eighth Passenger #45

    Leigh said: View Post
    Nice job! Neat & tidy
    Thanks Leigh,
    here's the casting. The area is already very precise and clean, but I will have to remove the burrs in the middle and on the edges of the base. Some areas seem to have bent, but in reality are only spots derived from the mold, maybe it is just a little wax residue. Then I will have to polish the area useful and paste a wooden support to protect the edges of the base while dragging on the thermoforming machine.

    It was tough because I was alone to carry out maneuvers. They were required 48 kg of plaster and 13.5 of water, distributed in three buckets from the weight of 20.5 kg each, to mix in a short time 2-3 minutes each, in order to have a three buckets with the same viscosity. I failed to fully dissolve all lumps of chalk. Perhaps it would be better to make a bucket at a time, ensuring better mixing. However when no bubbles or surface areas mealy.

    This synthetic gypsum acquire its maximum mechanical characteristics (hardness> 300 Brinell) in 8 hours in the oven at 40 , but in my case within 3 - 4 days at room temperature. However, it is already very hard and allows free sanding knead the sandpaper.

    Post back to the mold completed.

    Greetings

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    These could be silicone residues, however, they are the alien skin residue moulting.
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  21. Member Since
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    Aug 19, 2015, 7:19 PM - Re: The Eighth Passenger #46

    I am totally Blown Away by your skills! Seriously, I can't believe how quickly you do this either!
  22. daredevil665's Avatar
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    Sep 1, 2015, 4:35 AM - Re: The Eighth Passenger #47

    BatFastard said: View Post
    I am totally Blown Away by your skills! Seriously, I can't believe how quickly you do this either!
    Thanks BatFastard,
    I try, but I'm afraid it will be hard to complete the work.
    However, here is the finished mold and polished. The polishing is not only necessary for a better finish of the molded part, but also to improve the extraction of the piece, because it glides better with less friction. And in this case it is necessary that slides better, because there are some undercuts.
    I used an abrasive paste for car body with cloth and "gravy elbow" (way of saying fatigue)
    This evening I deliver it to the supplier of thermoformed and hope that it works well.

    Another point that I can recommend to those who want to do the same thing, is to keep a thickness less than that given by me, that is 25mm, because my mold weighs almost 50 kg. Should be more than enough 15mm, provided that it is ribbed like mine. You should get a mold from 30 kg.

    I return to post as soon as I got the first mold.

    See you soon

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    Last edited by daredevil665; Sep 1, 2015 at 4:45 AM.
  23. xenobiologist RPF Premium Member Leigh's Avatar
    Member Since
    Jul 2011
    From
    Cambs, UK
    Messages
    1,739
    Sep 5, 2015, 12:18 AM - Re: The Eighth Passenger #48

    This is looking really impressive!!!
    You've put a lot of hard work into this, I can't wait to see the results!
  24. xenobiologist RPF Premium Member Leigh's Avatar
    Member Since
    Jul 2011
    From
    Cambs, UK
    Messages
    1,739
    Sep 26, 2015, 12:44 AM - Re: The Eighth Passenger #49

    Any progress on this?
  25. daredevil665's Avatar
    Member Since
    Jun 2013
    From
    Emilia Romagna Italy
    Messages
    514
    Sep 26, 2015, 1:28 AM - Re: The Eighth Passenger #50

    Leigh said: View Post
    Any progress on this?
    Hello Leigh,

    I'm waiting for the thermoformed piece. The supplier is overworked. Perhaps he will be able to give it to me next week and post the photos here. When I have the dome,I can finish the head according to the contours of the dome.

    Meanwhile,I have covered other parts of the body with plastic resin two-component "DURALOID COATPLAST",to protect the polystyrene from fiberglass.

    Thanks for your participation and best regards

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