怎样选择合适的模温机?
塑料破碎机 | 粉碎机 | 模温机 | 冷水机 | 干燥机 | 混色搅拌机 | 真空式吸料机---丰田机械
文章关键词:模温机
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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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