Mold temperature adjusting apparatus/method and mold temperature control unit

A mold temperature adjusting apparatus (1) comprising a high temperature fluid supply system (41) supplying a fluid of high temperature into a mold (2), a low temperature fluid tank (3), a low temperature fluid transfer pump (6, 7), a low temperature fluid supply system (31) supplying the fluid into said mold (2) from said low temperature fluid tank (3), a low temperature fluid return system (35) returning the fluid into said low temperature fluid tank (3) from said mold (2) and a low temperature fluid by-pass system (40) connecting said low temperature fluid supply system (31) and said low temperature fluid return system (35) to each other so that a control of a mold temperature of said mold (2) is effected by a high temperature heat medium and low temperature heat medium of predetermined temperatures being selectively caused to flow in a heat medium passage provided in said mold (2), wherein said mold temperature adjusting apparatus (1) further comprises a mold temperature sensor (62) actually measuring a mold temperature of said mold (2) and a mold temperature control means (132) performing a control including the steps of;

• while said mold (2) is heated, stopping supply of the high temperature heat medium into said mold (2) through said high temperature fluid supply system (41) when the mold temperature is elevated to a high temperature fluid stop temperature TH−ΔTH obtained by subtracting a heating over-shooting temperature correction value ΔTH from a predetermined resin filling start mold temperature TH and while said mold (2) is cooled, stopping supply of the low temperature heat medium into said mold (2) through said low temperature fluid supply system (31) when the mold temperature is lowered to a low temperature fluid stop temperature TL+ΔTL1 obtained by adding a cooling under-shooting temperature correction value ΔTL1 to a predetermined mold opening start temperature TL, said heating over-shooting temperature correction value ΔTH being a predicted elevated temperature value regulating a supply stop timing of the high temperature heat medium so that over-shooting of the mold temperature is suppressed, said cooling under-shooting temperature correction value ΔTL1 being a predicted lowered temperature value regulating a supply stop timing of the low temperature heat medium so that under-shooting of the mold temperature is suppressed.