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dinkycollect
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DTCA MemberFrance
Joined: Fri, 06/26/2015 - 22:49

Dinky Toys manufacturing.

This post has been transfered from the thread "Matching pictures).

I believe I have shown this photo once before. I used it as a demonstration that possibly a more or less squarish model was a bit easier to cast, allowing for a seam of the vertical halves in the middle.

The models on top are square and show that seam. The models below have more round shapes, which took more die- elements to cast in my opinion. So possibly, if there was an opportunity to make a more square model, the casting would be easier - and cheaper no doubt. Just a theory ....

Kind regards,

Jan

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dinkycollect
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DTCA MemberFrance
Joined: Fri, 06/26/2015 - 22:49

This is the die for the Big Bedford chassis and cab. It shows how things work.

When designing a die, one must take in account the shape of the casting to be made and where to hide the seems or die partition lines. In the case of the Plymouth, the Daimler ambulance and others, the seem are clearly visible on the roof but it is hiden in the center line of the bonnet.

The die for these models with vertical rear have four sliding drawers. The Big Bedford has two only. On the picture above, you can see that these drawers are square, they have a very tight fit with the other parts ofthe die so that there is no flash in between.

Jan is right, the rear of the Plymouth has been made square because otherwise the mobile part of the die on which the rear hatch is machined would have had a curved top which is probably possible but extremely difficult to make.

I am sorry but it is difficult for me to explain all this in English and in writing. If you wish, I could explain this verbally during the next AGM.

Partition lines for 27f Estate car.