| 摘要 |
PROBLEM TO BE SOLVED: To enable an accurate detection of a density of a resin. SOLUTION: An injecting unit comprises a cylinder member, an injecting member, a first drive means for rotating the injecting member, a second drive means for advancing or retracting the injecting member, a metering control means for driving the first drive means to rotate the injecting member in a forward direction in a metering step, an injecting member advancing control means for pressing the injecting member by a predetermined force to advance the member during a period from completion of the metering step up to starting of the injecting step, an injecting member rotation control means for rotating the injecting member in a reverse direction during a period while the injecting member is pressed by the predetermined force and advanced, and a resin density calculation control means for calculating the density of the resin based on an advancing amount of the injecting member.
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