模具设计技术2-DESIGN FOR PRODUCTIVITY AND PERFORMANCE

(112页)

'模具设计技术2-DESIGN FOR PRODUCTIVITY AND PERFORMANCE'
学习模具 设计 (二)DESIGN FOR PRODUCTIVITY & 一 PERFORMANC(E ) 冷卻系統设计 COOLING SYSTEM DESIGN? 模具冷卻系統總覽 ? Mold cooling system ? 冷卻系統設計重要性 overview ? Importance of cooling ? 模具冷卻在射出模壓 system design 熱塑產品生產中占了 ? Mold cooling accounts for more than two-thirds of the total 總周期時間的三分之 cycle time in the production of 二以上 即闡 injection molded thermoplastic . Figure 1 parts. Figure 1 illustrates this 明了這一點.一個有效 point. An efficient cooling 的冷卻回路設計減少 circuit design reduces the cooling time, which, in turn, 了冷卻時間,這會在整 ? increases overall productivity. 體上增加生產力 而且 Moreover, uniform cooling . improves part quality by 均衡的冷卻通過減少 ? reducing residual stresses and 殘余應力提昇產品品 maintaining dimensional accuracy and stability 質,保持尺寸精确性與 ? (see Figure 2). 穩定性. (見圖 2). ? FIGURE 1. 模具冷卻占總成型周期時間三分之二以上? FIGURE 1. Mold cooling accounts for more than two-thirds of the total cycle time FIGURE 2. 正當有效的冷卻提昇產品品質與生產力? FIGURE 2. Proper and efficient cooling improves part quality and productivity? 模具冷卻系統組成要素 ? Mold cooling system ? 一個模具冷卻系統通常由 components 以下幾項組成 ? A mold cooling system typically : consists of the following items:? *溫度控制單元 ? * Temperature controlling unit? * 泵 ? * Pump ? 供應歧管 * Supply manifold? * ? *Hoses? * 軟管 ? * Cooling channels in the mold? * 模具冷卻管道 ? * Collection manifold ? The mold itself can be ? *集中導管(歧管) considered as a heat exchanger, ? 模具本身可視作熱量交換 with heat from the hot polymer melt taken away by the 器,流通的冷卻劑把熱聚合 circulating coolant. 物所帶的熱能帶走. ? Figures 3 and 4 illustrate the ? Figures 3 & 4 闡明典型 components of a typical cooling system. 的冷卻系統的組成要素. ? FIGURE 3. 射出成型機典型的冷卻系統..? FIGURE 3. A typical cooling system for an injection molding machine.? FIGURE 4. 附屬于模板上的冷卻管道組立圖.? FIGURE 4. A cooling channel assembly attached to the mold plates.? 冷卻管道結構配置 ? Cooling-channel configuration? 冷卻道[冷卻劑或載熱 ? Types of cooling channels 劑管道]的種類 ? Cooling-channel configurations can be serial ? 冷卻道配置可以是串 or parallel. Both 聯的或并聯的 兩種配 configurations are . ? illustrated in Figure 1 below. 置如下圖所示.? FIGURE 1. 冷卻道結構配置 ? FIGURE 1. Cooling-channel configurations ?? 并聯冷卻管道 Parallel cooling channels? 并聯冷卻管道從供給歧管 ? Parallel cooling channels are drilled 直向鑽通到集中導管 由 straight through from a supply . manifold to a collection 于并聯設計的流動特性,不 ? manifold. Due to the flow 同冷卻管道的流率可能不 characteristics of the parallel design, the flow rate along various 同,取決于每個單一冷卻管 cooling channels may be different, 道的流動阻力 這些不同的 depending on the flow resistance of . each individual cooling channel. 流率會依次造成各個不同 ? These varying flow rates in turn 冷卻管道的熱傳輸效率.最 cause the heat transfer efficiency of 終 模具的冷卻不會因并聯 the cooling channels to vary , ? from one to another. As a result, 的冷卻管道配置而均衡一 cooling of the mold may not be 致 典型地 模具公母面具 uniform with a parallel . , coolingchannel configuration. 有它們自己的平行冷卻管 ? Typi
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