笔模配件与其它类塑胶模具相比，具有较大的纵深比，脱模困难，对热源较敏感，配合胶位严格，易跑飞边，且筋位一般都较薄和深，难于加工。

To compare Pen mould accessory with other plastic mould ccessory, Pen mould is much deeper, consequently hard to de-mould, and also pretty sensitive to heat sources, requires strict coordination,prone to parting-line flash and the rib normally too thin and deep, hard to process.