Device for predicting deposits in mold device and injection molding machine

The invention relates to a device for predicting deposits in a mold device and an injection molding machine, which can simply estimate the adhesion amount of deposits in the mold device. This injection molding machine (1) is provided with an injection device (11) that injects a molding material into a mold device (101), and is provided with: a gas analysis unit that analyzes gas generated from the injection device (11) and/or the mold device (101) and measures the amount of material gas generated from the molding material; and a deposit estimation unit that estimates the amount of deposit adhering in the mold device (101) from the amount of material gas generated on the basis of material decomposition information relating to the relationship between the amount of non-volatile components generated and the amount of volatile components generated when the molding material has been heated. 本发明涉及模具装置内的堆积物预测装置及注射成型机，能够简单地推断出模具装置内的堆积物的附着量。本发明的注射成型机(1)具备向模具装置(101)内注射成型材料的注射装置(11)，所述注射成型机(1)具有：气体分析部，分析来自注射装置(11)和/或模具装