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怎樣選擇合適的模溫機(jī)？ |
塑料破碎機(jī) | 粉碎機(jī) | 模溫機(jī) | 冷水機(jī) | 干燥機(jī) | 混色攪拌機(jī) | 真空式吸料機(jī)---豐田機(jī)械 |
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模溫機(jī)選型的計(jì)算方法 |
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1.特殊的情況需進(jìn)行計(jì)算： |
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A、求加熱器功率或冷凍功率 KW＝W×△t×C×S/860×T |
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| W=模具重量或冷卻水 KG |
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| t=所需溫度和起始溫度之間的溫差。 |
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| C= 比熱 油（0.5），鋼（0.11），水（1），塑料（0.45~0.55） |
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| B、求泵的大小 |
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| 需了解客戶所需泵浦流量和壓力（揚(yáng)程） |
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| P（壓力Kg/cm2）=0.1×H（揚(yáng)程M）×α（傳熱媒體比重，水=1，油=0.7-0.9） |
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| L（媒體所需流量L/min）=Q（模具所需熱量Kcal/H）/C(媒體比熱水=1 油=0.45)×t（循環(huán)媒體進(jìn)出模具的溫差）×α×60 |
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| 2.冷凍機(jī)容量選擇 |
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| A、Q（冷凍量Kcal/H）=Q1+Q2 |
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| Q1（原料帶入模具的熱量Kcal/H）=W（每小時(shí)射入模具中原料的重量KG）×C×（T1-T2）×S（安全系數(shù)1.5~2） |
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| T1 原料在料管中的溫度；T2 成品取出模具時(shí)的溫度 |
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| Q2 熱澆道所產(chǎn)生的熱量Kcal/H |
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| B、速算法（有熱澆道不適用） |
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| 1RT=7~8 OZ 1OZ=28.3g（含安全系數(shù)） |
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| 1RT=3024Kcal/H=12000BTU/H=3.751KW |
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| 1KW=860 Kcal/H 1 Kcal=3.97BTU |
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| 3、冷卻水塔選用=A+B |
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| A、射出成型機(jī)用 |
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| 冷卻水塔RT=射出機(jī)馬力（HP）×0.75KW×860Kcal×0.4÷3024 |
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| B、冷凍機(jī)用 |
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| 冷卻水塔RT=冷凍機(jī)冷噸（HP）×1.25 |
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