product news/產品新聞
These sand molds are printed directly from a CAD file.
berg, Germany, which operates one of the leading service centers for the on-demand production of sand molds for metal castings and offers the VX4000 high-performance printer, which can print molds up to 4 x 2 x 1 m. “In particular, companies such
as ours, which manufacture many prototypes and small series, can de- rive tremendous benefits from the possibilities offered by 3-D print- ing in terms of quality and time,” said Nijhuis development engineer Luke Vrielink. Conventional manufacturing of a pump prototype requires three to four months from the drawing to the processed casting. Generally, the production of a wooden model can take two to three months. Te sand mold takes another few days. With 3-D printing, throughput times are significantly
shorter. Te information is e-mailed to voxeljet’s order de- partment the minute the CAD design has been completed. Based on the 3-D CAD data, a high-performance printer at voxeljet’s service center produces the molds without tools and on a fully automated basis using the layer building method. Tis does away with the cumbersome and expensive method of using the required molding system. It is also pos- sible to generate complex geometries with undercuts that are true to detail and highly precise. Depending on the size of the piece, the printing process takes one to two days. 3-D sand mold printing allows Nijhuis to reduce the number of casting molds in storage and still deliver quickly if a pump part must be replaced onboard a ship, for example. “Te fact that we can now have the large sand molds printed at voxeljet at a reasonable cost means we are able to
这些砂型是直接通过CAD文件打印 而成的。
通过打印技术完成了几个项目。 这项技术来自于Voxeljet，这家 公司的领先的服务中心可以生 产制定标准的砂型，还可以提供 VX4000高性能打印机，这台打 印机可以制造出体积为4 x 2 x 1 米的砂型。
Nijhuis的开发工程师Luke
Vrielink表示，“特别像我们这 样的公司，需要生产诸多产品的 原型和小批量的产品，而通过3D 打印技术可以节省大量的时间同 时提高质量，对我们来说有百利 而无一害。”
传统的泵生产原型需要大概3 至4个月的时间，这期间包括了 图纸到生产。通常来说，生产木 模就需要2至3个月的时间，而制
作出相应的砂型还需要几天的时间。
而通过3D打印机，生产的时间将会大幅度的缩短。 一旦CAD设计完成，就可以把信息发送到Voxeljet公司 的订单部门。通过3D的CAD数据，在Voxeljet服务中心 的高性能3D打印机就会自动制造砂型。在这个过程中 使用的是层叠的方法，不需要机床。使得砂型制造得以 摆脱那些笨重昂贵的传统生产线。还可以通过切铣的方 式生成复杂的、高精度的几何形状。根据砂型的尺寸， 整个打印时间一般会花费1到2天。
例如，3D砂型打印可以使得Nijhuis在减少砂型存储 数量的前提下，在轮船上泵出现问题需要替换时，仍然 可以迅速交付客户。 Vrielink表示：“我们现在可以以合理的价格在Vox-
Depending on the size of the piece, the printing process takes one to two days.
根据砂型的尺寸，整个打印 时间一般会花费1到2天。
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FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION Winter 2012
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