| 摘要 |
<p>When chipboard beams are produced in a horizontal extrusion press and the chips in a binder are admitted from a hopper without a slider to the press space, a differential segregation occurs because the fine chips tend to accumulate near the bottom and the coarse chips remain near the top. This is purposely not countered by a rapidly operated slider but is turned to best advantage by turning the beam through 180 deg. when applying it as a horizontal structural member. The small chips are better able to absorb compressive stresses, and the matted larger chips can absorb higher tensile stresses.</p> |
