Injection molding method and injection molding machine
Mold clamping conditions, including a predetermined mold gap, a predetermined mold clamping force, a predetermined back pressure for a movable mold, a predetermined mold closing pressure, and a predetermined mold closing pressure adjustment condition associated with the compression state of a molding material, are set beforehand. At the time of molding, an injection filling process for causing the injection device to inject and fill the molding material into a mold of a mold clamping device for which the mold clamping conditions have been set is performed, and, after completion of the injection filling process, a compression process is performed on the basis of the mold clamping conditions including the mold closing pressure adjustment condition.
1 . An injection molding method in which an injection filling process of injecting and filling a molding material by an injection device into a mold composed of a movable mold and a stationary mold and having a mold gap therebetween is performed, and, after completion of the injection filling process, a compression process of compressing the molding material by applying a predetermined mold closing pressure to the mold by a mold clamping device is performed, wherein
mold clamping conditions, including a predetermined mold gap, a predetermined mold clamping force, a predetermined back pressure for the movable mold, a predetermined mold closing pressure, and a predetermined mold closing pressure adjustment condition associated with a compression state of the molding material, are set beforehand,
at the time of molding, the injection filling process for causing the injection device to inject and fill the molding material is performed for the mold of the mold clamping device for which the mold clamping conditions have been set, and
after completion of the injection filling process, the compression process is performed on the basis of the mold clamping conditions including the mold closing pressure adjustment condition,
wherein the molding material is a thermosetting resin material, and
wherein the compression state of the molding material includes at least one of:
a size of the mold gap between the movable mold and the stationary mold;
a magnitude of the mold closing pressure; and
a magnitude of viscosity of the molding material.
2 . The injection molding method according to claim 1 , comprising graphically displaying the mold gap, the mold closing pressure, and viscosity of the molding material on a display.
3 . The injection molding method according to claim 1 , wherein the injection filling process is ended when the movable mold reaches a compression start position set beforehand.
4 . The injection molding method according to claim 1 , wherein the predetermined back pressure for the movable mold is applied by the mold clamping device, and the predetermined mold clamping force is preset to be zero or substantially minimal during the injection filling process.