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US 12,629,873 B2Granted
Mold clamping device and injection molding machine
AssigneeThe Japan Steel Works, Ltd.
InventorSouma Mitani
Life of this patent
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Abstract
The present invention relates to a mold clamping device that includes: a fixed platen to which a mold is attachable; a movable platen configured to move closer towards or away from the fixed platen; and a rotary platen disposed to face a surface of the movable platen facing the fixed platen and to which a mold is attachable. A cylindrical protrusion is fixedly installed on the surface of the movable platen facing the fixed platen. The rotary platen is rotatably connected to the protrusion via a bearing structure.
Claims2
A mold clamping device comprising:
- fixed platen, a first mold being attachable to the fixed platen;
- a movable platen configured to move closer toward or away from the fixed platen;
- a rotary platen disposed to face a surface of the movable platen facing the fixed platen, a second mold being attachable to the rotary platen, wherein a cylindrical protrusion is fixedly installed on the surface of the movable platen facing the fixed plate;
- and
- a bearing structure that connects the rotary platen to the protrusion rotatably,
- wherein a circular recess is formed on a surface of the rotary platen facing the movable platen, and the protrusion is designed to be accommodated in the recess,
- wherein the bearing structure is a cross roller ring, the cross roller ring including:
- a pair of inner rings;
- an outer ring that is rotatable relative to the pair of inner rings;
- and a plurality of rollers that are provided between the pair of inner rings and the outer ring,
- wherein the pair of inner rings is fitted to the protrusion and is fixed to the protrusion by a pressing member, and the outer ring is fixed by being sandwiched by the rotary platen and a pulley configured to rotate the rotary platen,
- wherein one of the protrusion and the recess is provided with a friction reducing plate-form member on a surface that faces the other, and
- wherein the friction reducing plate-form member is configured to be separated from the other when the rotary platen rotates and comes into close contact with the other by elastic deformation of the rotary platen during mold clamping.
10 more elements
An injection molding machine comprising:
- a mold clamping device configured to clamp a mold;
- and
- an injection device configured to inject an injection material,
- wherein the mold clamping device comprising:
- a fixed platen, a first mold being attachable to the fixed platen;
- a movable platen configured to move closer toward or away from the fixed platen;
- a rotary platen disposed to face a surface of the movable platen facing the fixed platen, a second mold being attachable to the rotary platen, wherein a cylindrical protrusion is fixedly installed on the surface of the movable platen facing the fixed plate;
- and
- a bearing structure that connects the rotary platen to the protrusion rotatably,
- wherein a circular recess is formed on a surface of the rotary platen facing the movable platen, and the protrusion is designed to be accommodated in the recess,
- wherein the bearing structure is a cross roller ring, the cross roller ring including:
- a pair of inner rings;
- an outer ring that is rotatable relative to the pair of inner rings;
- and a plurality of rollers that are provided between the pair of inner rings and the outer ring,
- wherein the pair of inner rings is fitted to the protrusion and is fixed to the protrusion by a pressing member, and the outer ring is fixed by being sandwiched by the rotary platen and a pulley configured to rotate the rotary platen,
- wherein one of the protrusion and the recess is provided with a friction reducing plate-form member on a surface that faces the other, and
- wherein the friction reducing plate-form member is configured to be separated from the other when the rotary platen rotates and comes into close contact with the other by elastic deformation of the rotary platen during mold clamping.
14 more elements
Dependencies are inferred from the claim text.