Mould-related defects are often avoidable 與模具有關的缺陷常常是可以避免的
Apart from the selected process parameters, defects found in the finished moulded part may have their origin in the number of cavities in the mould, an unfavorable design of the hot or cold runner as well as in the type, location and size of the gate and the geometry of the moulded part. Such design deficiencies should be overcome at an early stage of mould making. 除了與選定的過程參數有關外,在模塑制品上存在的一些缺陷,其產生還以下因素有關:型腔數,冷熱流道的不當設計,澆口的類型、位置和大小,以及成型零件的幾何形狀。諸如此類的一些設計不良在制模的初期應就應予以克服。
Frequently, when confronted with the result of mould trials, moulders are prepared to compromise on mould quality, hoping to avoid the extra time and expense of modifying the mould. In the majority of cases, such compromise involves the use of machine settings that are anything but optimal for the specific process. In other words, moulders are tempted to try to compensate for shortcomings in mould design by accepting unsuitable process parameters. Production under such conditions is anything but normal, affording too narrow a process window and, all told, tends to be more expensive than when an optimized mould is used.通常,面對試模的結果,制模師們都會對模具的質量作出妥協,以希望避免花費過多的時間和成本在修模上。在大多數情況下,這樣一種妥協包括使用隻對特定過程才最優化的機器設置。換言之,制模師們更願意通過接受不合適的過程參數來對模具設計上的不足進行補償。有條件的生產是正常的,但它能提供的處理窗口很狹窄,並且如眾所知,相比於採用最優化的模具,其成本更貴。
|