For the construction of track automodels. Drawing, description

MODELING
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For the construction of track automodels. Tips for a modeler

Modeling

To speed up the construction of the track car model in the circle of the Taldy-Kurgan regional station of young technicians, a set of devices was created:

die and punch for stamping cases;
mold for melting disks and current collectors;
matrices for cooking front and rear tires;
vulcanizer.

The matrix and the punch for stamping the hulls made of epoxy putty are covered with a separating layer. From calcined fiberglass (0,1-0,2 mm thick), we cut out three or four squares that fit the punch with a small margin. Then we smear these squares with epoxy resin and apply them alternately on the punch, smoothing out the wrinkles. In places where the folds cannot be removed, we cut the fabric and press one layer to another. The punch with layers of fiberglass is placed in a matrix and compressed under a press or in a vice.

After the complete curing of the epoxy resin (10-14 hours), the molds are heated to 70-80 °, and the punch, together with the molded body, is removed from the matrix. Using a knife, remove excess fiberglass and remove the body from the punch. To obtain rigidity, the body is heated in an oven at 110-120 °.

For two classes in a circle, you can make a case for one model. When working with epoxy resin, safety precautions must be observed: work with rubber gloves, ventilation is required.

The mold for melting discs is machined on a lathe from steel, and the discs themselves are made of plastic (fragments of cases from receivers, broken toys, etc.). The mold is heated to the melting temperature of the plastic, the pieces of which are placed through the upper hole. After the plastic is completely softened, a punch is inserted into the upper hole, and the mold is compressed to. stop in a vice. When the mold has cooled down, disassemble it. The disk for the wheel is ready.

For the construction of track car models
Die and punch for stamping cases

For the construction of track car models
Press truss for melting discs

Collapsible molds for tires (click to enlarge)

Current collectors are also made of plastic, and the form is made of duralumin on a milling machine. We put pieces of plastic in a heated form and, after softening, we squeeze the form in a vice until it cools.

For cooking tires on a lathe, collapsible molds are machined. Sequence of operations! in both halves of the form we place raw rubber with a small margin. Then we compress the form in a vice and put it in the vulcanizing apparatus under the press. After warming up to 110 °, we press the disks to failure and cook for 25-30 minutes at 150 °.

Author: A.Zernov

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