Jan 24, 2020 Viewed: 117 Tag: 3dprinting  

What is the relationship between 3d printing and complex molds?

What is a complex mold?

We are often asked by customers what is the complex mold, and what is the process of complex mold? Let's first literally understand what exactly is a complex mold? Literally, duplication is copying, and mold is the mold of the mold. To understand it literally, it means to copy the product from a mold. What is the process of compounding? What does he have to do with 3D printing? The first is to use 3D printing to make a prototype, that is, the master mold comes out, then a set of molds is copied through the process of duplicate molds, and finally the product is copied through this mold. The process is as follows:

Then the process of duplicate mold has existed in the prototype industry for so many years. Why does it always exist and has a relationship with 3D printed prototypes? I want to share with you from two levels of advantages and disadvantages.

What are the advantages of duplicate mode?

The duplicate mold is usually, for example, your product is slightly larger, such as 60mm × 60mm × 60mm or 100mm × 100mm × 100mm or larger. If you use 3D printing directly, for example, you need to make 50 pieces. Even in the case of 100 pieces, this cost may be more expensive, so if it is made with a duplicate mold, it may be slightly cheaper and more affordable. Recommended reading: Analysis of the industrialization prospects of domestic 3D printers, where is the way?

The first problem that the duplicate mold has to solve is that if there is no prototype, that is, the master mold shown in the figure above, the process of duplicate mold cannot be completed because the duplicate mold is to copy a product, so it must solve a source part. Problem, and the source piece is in our prototype industry, which is usually called the prototype piece. That prototype part was usually made by CNC machining, but now the development momentum of 3D printing is very fast, so the mold is often made directly by 3D printing to make a prototype, and then the processing is completed and then the mold is solved. Problems with prototypes.

Which materials can be duplicated, please pay special attention to the following paragraphs. The materials that can be duplicated are: ABS, POM, PP, PA, PMMA, and soft rubber. These materials are very commonly used, so why do I remind you to listen to the following sentence, it is similar to two words, the ABS, POM, PP, PA, PMMA it can reproduce are similar, it It is different from the materials that we really use plastic molds to produce. It is only close to the materials of these several physical properties. Of course, soft rubber does not have similar problems.

What are the disadvantages of duplicate mode?

It can be adjusted in various colors by copying the model prototype. For example, can I duplicate the red, yellow, and green of an ABS? can. However, the red, green, and yellow colors of its duplicates and the colors on our international pass number are color difference. If your color requirements are very high, even the red, yellow, or green color of the duplicated mold needs to be sprayed by hand later, because the color of the duplicated mold is far from the international pass number. In terms of soft rubber, you can mold 10 degrees, 15 degrees, 20 degrees, and directly to 90 degrees. You can choose this soft hardness problem.

There is another disadvantage of the duplicate mold. We judge based on past experience. If your product is within 100mm, the tolerance of the duplicate mold is usually about plus or minus 0.2mm. Greater than 100mm, such as 200M or 300mm, then this tolerance may go to the possibility of plus or minus 0.5mm, because the complex mold depends on the level of the complex mold master very much, it may appear shrinkage deformation, Moreover, it is generally not recommended to set more than ten molds for a set of molds, because the more the molds are copied to the back, the greater the shrinkage and deformation.

The third disadvantage is that due to its process, the prototype mold is poured out of the mold, so its delivery time will be longer.

In the end, I would like to summarize in one sentence. If your product prints a large number each time and there is no requirement for accuracy, you can consider using this method of duplicate molds, but if your number of products is the same product each time In the case of a small number, it is relatively small! And if there is a requirement for accuracy, then I don't recommend that you use the complex mold method, I still recommend that you use 3D printing. 3D printed prototyping has relative advantages.

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