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Guangzhou mold manufacturing: is there a difference between 3D printed molds and traditional machine molds (2)

浏览:152发布日期:2017-11-06 09:40:27 返回列表 Source: Guangzhou Haoshun Mould Co., Ltd.Browse: 152Release Date: 2017-11-06 09: 40: 27Return to list

Today, our Guangzhou mold manufacturer will continue to talk to you about the difference between 3D printed molds and traditional machine-made molds.

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Product design: The principle and practice of traditional injection mold manufacturing have a history of more than a century, and the industry has studied more thoroughly. 3D printed stencils are very new. For example, the draft angle must be greater than or equal to 5 degrees to meet the requirements of most aluminum alloy molds. Plastic injection-molded plastic parts face challenges, and the number and installation position of ejector pins in plastic molds need to be particularly careful. Plastic molds (especially high injection temperatures) are slightly more flexible in increasing cavity wall thickness and reducing pressure. The design of the gates is also different, and the use of tunnel and point gates should be avoided. Straight doors, leaf doors, and wing doors should be increased to 3 times the normal size. The flow direction of the polymer in the printing mold should be consistent with the 3D printing line to avoid high filling due to adhesion and low pressure. The cooling system increases the service life of the mold to a certain extent, but it will not significantly reduce the number of cycles of the printing mold, because the heat dissipation capacity of plastic molds is not as good as aluminum or steel molds.

Timing [Although fast aluminum molds have many advantages, 3D printed molds can still play an important role in some situations. For manufacturers who have a 3D printer and have enough time to study how injection molding machines use impressions, maybe they think the molds should be printed directly. When? However, mold designers must understand how to make functional molds and the cost of redesigning and manufacturing them. Since the setting of these parameters is very different from traditional molds, related technicians and equipment are also necessary-mechanized blasters, ejector installation, injection molding machine operators, etc.

But wait-why not use DMLS? Why not print a metal mold? DMLS uses lasers and precision optics to "draw" parts layer by layer on a fine metal powder bed to produce high-density commercial products for aerospace and medical applications. Some predict that aluminum and tool steel molds may be printed directly in the future to provide ultra-efficient conformal cooling channels, which will significantly reduce injection molding time and extend mold life. In a way, DMLS prints molds slowly and expensively, usually only for very small, complex molds or mold inserts that are difficult to manufacture with traditional processing methods. Reliable Measurements Overall, ProtoLabs believes it is best to use DMLS, SLA, or other 3D printing technologies, and they are good at: printing parts rather than molds. However, if the following conditions are met, 3D printed injection molds can be a viable alternative.

1) For small batches and relatively simple parts, the product requires a large draft angle.

2) The tool and mold design team is familiar with the design principles of 3D printed molds.

3) There are personnel and equipment for plastic mold processing and assembly.

Final design considerations. If you need to use the mold for a long time, once the 3D printed mold has verified the design, the next step is to make the mold from a more permanent material, such as aluminum or stainless steel, because plastic molds are used to produce small quantities. Due to the differences between 3D printed molds and traditional mold designs, a certain number of mold redesigns and tests should be considered in project time and budget.

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