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现在冷硬砂应用越来越广泛,它大大降低造型和制芯的劳动量。为了紧实这种型砂,撞击微震的方法是最有前途的方法。研究了振动频率5—3000赫,振幅0±8毫米的垂直撞击微震过程。应用 ST—3000型,举重量为50公斤的电动微振台(见图1略),它是东德 RFT 厂的产品。振动特性的测量采用万能的三线测振仪 SDM—132型、六线测振仪 SDM—162型和撞击测量仪 VM—5型(RFT 产品)。配合КД21型和 KB12/10型的压电式加速度传感器,就可在 H—700
Chilled sand now more and more widely used, it greatly reduces the labor of modeling and core making. In order to compact the sand, the method of impacting microseisms is the most promising method. The vertical impact microseismic process with vibration frequency 5-3000 Hz and amplitude 0 ± 8 mm was studied. Application ST-3000 type, weight 50 kg of electric vibration platform (see Figure 1 omitted), which is the East German RFT plant products. Vibration characteristics of the measurement using a universal three-line vibration meter SDM-132 type, six-line vibration meter SDM-162 type and impact measuring instrument VM-5 type (RFT products). With КД21 and KB12 / 10 type piezoelectric accelerometer, you can H-700