product news/產品新聞
Development engineer Luke Vrielink utilizes voxeljet to make 3D printed sand molds.
研发工程师Luke Vrielink 使用voxeljet3D打印机打 印砂型。
many prototypes and small series, can derive tremendous benefits from the possibilities offered by 3D print- ing in terms of quality and time,” said Nijhuis development engineer Luke Vrielink. Te conventional
manufacture of the prototype requires three to four months from the drawing to the processed casting. Generally, the wooden model can take two to three months to produce, with another few days to make the sand mold. Tis is not the case for 3D printing: throughput times are significantly shorter. Te information is e-mailed to voxel- jet’s order department the minute the CAD design has been completed. Based on the 3D 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 route of using the required molding system. It is also possible to generate complex geometries with undercuts that are true to detail and highly precise. Depending on the size of the piece, the printing process will take one to two days. Such short production times are especially important in
the case of pump prototypes, as exemplified by the Nijhuis pump factory, which always de- velops and builds pumps made to measure. Te 3D printing of the sand molds allows the pump manufacturer to reduce the number of casting molds in storage and still deliver more quickly if part of a pump must be replaced on board a ship, for example. Each day in the dock costs a lot of money. “Te fact that we can now have the large sand molds printed at voxeljet at a reasonable cost means that we are able to ship quickly, even
像我们这样生产多品种 小批量产品的企业，可 以从3D打印的质量和时 间优势中获得巨大的收 益。”
传统的制造工艺从原 型制图到铸件加工需要 3到4个月的时间。一般 情况下，木模需要2到
3个月的生产周期，另外还需几天时间来制作砂型。然 而，3D打印的整个生产周期明显缩短。当产品信息通过 电子邮件的方式发送到voxeljet公司的指令部门时，产 品的CAD设计图就已经完成了。在3D CAD数据的基础 上，voxeljet公司服务中心的高性能打印机无需模具， 采用分层构建方式全自动打印砂型。这种工艺摒弃了笨 重且昂贵的模塑机，还可以用于生产具有非常复杂的几 何形状、细节和精度要求高的砂型。根据部件的尺寸大 小，打印过程需1到2天。
如此短的生产周期对于泵的生产尤其重要，因 此，Nijhuis泵生产厂可以订制化研发和生产泵。砂型 的3D打印使泵生产商在模具 库存减少的同时，还可以很快 供货。货物在码头储存每天都 会产生大量的花费。Vrielink 说：“我们现在可以通过 voxeljet的3D打印机在合理的 成本范围内打印大型砂型，意 味着即使没有库存，我们也能 够很快交货。”
研发工程师发现了高质量 的显著优势。3D打印可以与 计算机模型保持1:1的比例，
This pump casting was produced with a 3D-printed sand mold.
用3D打印砂型生产出来的 泵铸件。
December 2014
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 77
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