Different building sand table models are made for different products
The building sand table model is different from the product entity model as follows:
(1) Different from the product solid model, such as cast iron casting mold or mechanical model. The industrialization mode of physical mapping is based on the existing or stereotyped drawings (opinions, three parts), which are made of wood or metal materials in larger or smaller scale. Such dimensions are strictly gate hoists, and the absolute precision represents the image. this Industrial model During the production process, it is not allowed to modify the original drawings and body changes. If you want to change, some multilateral procedures, designers and leading symbols can be changed after approval.
(2) Different sculptures. Sculpture is based on the author's ideas and artistic treatment of shaping. After finishing the shape, it will give a beautiful feeling. It seeks more artistic, abstract deformation can be exaggerated, and not very practical, but also can not reflect the structure, function and human-computer relationship. Achieved creation and purpose.
To make a building sand table model
When building sand table models are made, the first step is polishing. There are many places to pay attention to in the polishing process. This article provides some experience and skills in polishing and painting models. After the model is assembled, there will be many cracks on the model surface, which will seriously affect the appearance of the model, so it is necessary to repair the cracks on the model. The main tools are soil filling, file and sandpaper.
In addition, it should be noted that the model must be glued during assembly, otherwise it is easy to crack again after the seam repair. It is also called "Budi", which is an organic resin specially used to fill the cracks in the model. There are also many kinds of products, which are commonly used by Tiangong Company. It is available in many large model stores. When using, use a proper tool to dip an appropriate amount of it on the joint line or concave to be filled. When plastering, apply a certain pressure to fill every corner of the concave.
The filler contains soluble plastic solution, so it is not easy to fall off when contacting the model surface. But because the solution in it will volatilize, its volume will shrink a little after it is completely dried and hardened. When we fill the soil, we should fill more. Make the fill have enough volume to meet the needs of grinding.
After the filling soil is completely dry (about four or five hours), it can be polished. First, file with a file along the curve. When the file is almost complete (you must judge by yourself), change the sandpaper for polishing. The larger the sandpaper number, the finer the particles. Usually 400 is used first, then 600 and 800. When using abrasive paper above 800, dip a little water to polish, so that the surface will be smoother. Sometimes the filling soil will fill the concave line of the model. At this time, when the filling soil is not dry, use a carving knife or toothpick to carve back the concave line. After polishing, a layer of water shall be sprayed to fill the soil. It is liquid and can mainly check the repair and polishing. At the same time, it is light gray and can be used as the background color of the model. When it is found that it needs to be repaired again, it should be put on for a day, and then repaired and polished after the water and soil are dry.
