| 模具温控机(恒温机、模温机)选型的计算方法 |
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| 1.特殊的情况需进行计算: |
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| A、求加热器功率或冷冻功率 KW=W×△t×C×S/860×T |
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| W=模具重量或冷却水 KG |
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| t=所需温度和起始温度之间的温差。 |
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| C= 比热 油(0.5),钢(0.11),水(1),塑料(0.45~0.55) |
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| B、求泵的大小 |
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| 需了解客户所需泵浦流量和压力(扬程) |
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| P(压力Kg/cm2)=0.1×H(扬程M)×α(传热媒体比重,水=1,油=0.7-0.9) |
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| L(媒体所需流量L/min)=Q(模具所需热量Kcal/H)/C(媒体比热水=1 油=0.45)×t(循环媒体进出模具的温差)×α×60 |
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| 2.冷冻机容量选择 |
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| A、Q(冷冻量Kcal/H)=Q1+Q2 |
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| Q1(原料带入模具的热量Kcal/H)=W(每小时射入模具中原料的重量KG)×C×(T1-T2)×S(安全系数1.5~2) |
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| T1 原料在料管中的温度;T2 成品取出模具时的温度 |
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| Q2 热浇道所产生的热量Kcal/H |
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| B、速算法(有热浇道不适用) |
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| 1RT=7~8 OZ 1OZ=28.3g(含安全系数) |
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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、冷却水塔选用=A+B |
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| A、射出成型机用 |
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| 冷却水塔RT=射出机马力(HP)×0.75KW×860Kcal×0.4÷3024 |
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| B、冷冻机用 |
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| 冷却水塔RT=冷冻机冷吨(HP)×1.25 |
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