Clamping mechanism of molding machine

A clamping mechanism of a molding machine having a stationary platen carrying a stationary mold and a guide bar arranged fixedly relative to the stationary platen and defining a longitudinal guiding axis, comprising:

• a first movable platen arranged movably relative to said stationary platen along said guiding axis, and carrying a movable mold;
• a support structure interposed between said guide bar and said first movable platen, and movably supporting said first movable platen on said guide bar along said guiding axis;
• a second movable platen separate from said first movable platen, and arranged movably relative to said stationary platen along said guiding axis;
• a connecting member connecting said first movable platen and said second movable platen to each other;
• and
• a drive section for applying a drive force to said second movable platen, to move said first movable platen and said second movable platen along said guiding axis;
• wherein said support structure comprises a spline engaging surface provided on said guide bar and a ball spline nut provided in said first movable platen, said ball spline nut being operatively engagable with said spline engaging surface;
• and
• wherein said second movable platen includes a through-hole receiving said guide bar without engaging with said spline engaging surface.

A clamping mechanism of a molding machine having a stationary platen carrying a stationary mold and a guide bar arranged fixedly relative to the stationary platen and defining a longitudinal guiding axis, comprising:

• a first movable platen arranged movably relative to said stationary platen along said guiding axis, and carrying a movable mold;
• a support structure interposed between said guide bar and said first movable platen, and movably supporting said first movable platen on said guide bar along said guiding axis;
• a second movable platen separate from said first movable platen, and arranged movably relative to said stationary platen along said guiding axis;
• a connecting member connecting said first movable platen and said second movable platens in a manner shiftable along said guiding axis relative to each other;
• a drive section for applying a drive force to said second movable platen, to move said first movable platen and said second movable platen along said guiding axis;
• and
• a biasing member interposed between said first and second movable platens, said biasing member elastically biasing said first and second movable platens toward each other along said guiding axis.

A clamping mechanism of a molding machine having a stationary platen carrying a stationary mold and a guide bar arranged fixedly relative to the stationary platen and defining a longitudinal guiding axis, comprising:

• a first movable platen arranged movably relative to said stationary platen along said guiding axis, and carrying a movable mold;
• a support structure interposed between said guide bar and said first movable platen, and movably supporting said first movable platen on said guide bar along said guiding axis;
• a second movable platen separate from said first movable platen, and arranged movably relative to said stationary platen along said guiding axis;
• a connecting member connecting said first movable platen and said second movable platen to each other;
• and
• a drive section for applying a drive force to said second movable platen, to move said first movable platen and said second movable platen along said guiding axis;
• wherein said first movable platen is made from a material having a rigidity higher than that of said second movable platen.