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紙箱包裝抗壓試驗機

紙箱包裝抗壓試驗機用于测试纸箱耐压强度，该指标是许多商品包装要求的最重要的质量指标，测试时将瓦楞纸箱放在两压板之间，加压至纸箱压溃时的压力，即为纸箱耐压强度，用KN表示。

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産品用途
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環剛度試驗機广泛应用于具有环形横截面的热塑性塑料管材和玻璃钢管环刚度的测定,满足PE双臂波纹管、缠绕管和各种管材标准的要求，可以完成管材环刚度、环柔度、扁平、焊缝拉伸等试验。具有按键调速、试验力位移数字显示，具有峰值保持、破坏自动停机、过流、过载自动保护功能。

産品特點
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紙箱包裝抗壓試驗機纸箱耐压强度是许多商品包装要求的最重要的质量指标，测试时将瓦楞纸箱放在两压板之间，加压至纸箱压溃时的压力，即为纸箱耐压强度，用KN表示。

1、預定紙箱耐壓強度

紙箱要求有一定的耐壓強度，是因爲包裝商品後在貯運過程中堆碼在最低層的紙箱受到上部紙箱的壓力，爲了不至于壓塌，必須具有合適的抗壓強度，紙箱的耐壓強度用下列公式計算：

P=KW（n-1）
式中P－－－－紙箱耐壓強度，N
W－－－－紙箱裝貨後重量，N
n－－－－堆碼層數
K－－－－堆碼安全系數
堆碼層數n根據堆碼高度H與單個紙箱高度h求出，n=H/h
堆碼安全系數根據貨物堆碼的層數來確定，國標規定：
貯存期小于30d取K=1.6
貯存期30d-100d取K=1.65
貯存期大于100d取K=2.0

2、據原料計算出紙箱抗壓強度

預定了紙箱抗壓強度以後，應選擇合適的紙箱板、瓦楞原紙來生産瓦楞紙箱，避免盲目生産造成的浪費；
根據原紙的環壓強度計算出紙箱的抗壓強度有許多公式，但較爲簡練實用的是kellicutt公式，它適合于用來估算0201型紙箱抗壓強度。

3、確定紙箱抗壓強度的方法

由于受生産過程中各種因素的影響，最後用原料生産的紙箱抗壓強度不一定與估算結果完全一致，因此最終精確確定瓦楞紙箱抗壓強度的方法是將紙箱恒溫濕處理後用紙箱抗壓試驗機測試；對于無測試設備的中小型廠，可以在紙箱上面蓋一木板，然後在木板上堆放等量的重物，來大致確定紙箱抗壓強度是否滿足要求。

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: 單柱式紙張拉伸試驗機

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: 紙箱包裝抗壓試驗機

紙箱包裝抗壓試驗機用于测试纸箱耐压强度，该指标是许多商品包装要求的最重要的质量指标，测试时将瓦楞纸箱放在两压板之间，加压至纸箱压溃时的压力，即为纸箱耐压强度，用KN表示。 ...

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"And sure," she said, "and I hope that wretched old Feejee won't be in Japan at all, at all, and the horrid haythens won't roast him." THIRD-CLASS PASSENGERS. THIRD-CLASS PASSENGERS. I was about to put a false meaning even on that, when she added "We don't need the ford this time of year; let us ride back as if we gave up the trip--for there may be a vidette looking at us now in the edge of those bushes--and as soon as we get where we can't be seen let us take a circuit. We can cross the creek somewhere above and strike the Wiggins road up in the woods. You can find your way by the blessed stars, can't you--being the angel you are?" "Good-night, gentlemen," said the doctor at last. As he passed into the darkness Quinn bent a mock frown upon his young superior. It would require a mathematical diagram to describe the incident with absolute accuracy. The Curate, of course, had heard nothing about the Clockwork man's other performances; he had scarcely heeded the hints thrown out about the possibility of movement in other dimensions. It seemed to him, in the uncertain light of their surroundings, that the Clockwork man's right arm gradually disappeared into space. There was no arm there at all. Afterwards, he remembered a brief moment when the arm had begun to grow vague and transparent; it was moving very rapidly, in some direction, neither up nor down, nor this way or that, but along some shadowy plane. Then it went into nothing, evaporated from view. And just as suddenly, it swung back into the plane of the curate's vision, and the hand at the end of it grasped a silk hat. Good fitting is often not so much a question of skill as of the standard which a workman has fixed in his mind, and to which all that he does will more or less conform. If this standard is one of exactness and precision, all that is performed, whether it be filing, turning, planing, or drawing, will come to this standard. This faculty of mind can be defined no further than to say that it is an aversion to whatever is imperfect, and a love for what [171] is exact and precise. There is no faculty which has so much to do with success in mechanical pursuits, nor is there any trait more susceptible of cultivation. Methodical exactness, reasoning, and persistence are the powers which lead to proficiency in engineering pursuits. I was the only civilian in that road, and the soldiers, with much curiosity, stared at me. Whenever I noticed an officer, I gave an elaborate military salute, and with such an air that the officers, although hesitating at first, did not fail to return the salute. The reformed system of education was to be not only moral and religious but also severely scientific. The place given to mathematics as the foundation of a right intellectual training is most remarkable, and shows how truly Plato apprehended the conditions under which knowledge is acquired and enlarged. Here, as in other respects, he is, more even than Aristotle, the precursor of Auguste Comte. He arranges the mathematical sciences, so far as they then existed, in their logical order; and his remarks on the most general ideas suggested by astronomy read like a divination of rational mechanics. That a recommendation of such studies should be put into the mouth of Socrates is a striking incongruity. The older Plato grew the farther he seems to have advanced from the humanist to the naturalistic point of view; and, had he been willing to confess it, Hippias and Prodicus were the teachers with whom he finally found himself most in sympathy. We are told that when his end began to approach, the dying philosopher was pressed to choose a successor in the headship of the School. 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