Drive mechanism for screw of injection cylinder, injection device and injection molding machine including the same, and method for manufacturing drive mechanism
JP2026009495APending Publication Date: 2026-01-21THE JAPAN STEEL WORKS LTD
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Patent Information
- Application Number
- JP2024109397
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2026-01-21
AI Technical Summary
Technical Problem
Existing screw drive mechanisms in injection molding machines require a large torque to apply preload to thrust bearings, necessitating the use of a special tool, which complicates the process.
Method used
A screw drive mechanism that includes a thrust bearing supported by a support nut with circumferentially arranged threaded holes, allowing easy application of preload using bolts, reducing the required tightening torque and enabling manual operation.
Benefits of technology
Facilitates easy and uniform preload application to thrust bearings, simplifying the assembly process and reducing the need for specialized tools.
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Smart Images
Figure 2026009495000001_ABST
Abstract
To easily apply preload to a bearing provided on a front plate.SOLUTION: The driving mechanism of the screw of the injection cylinder includes the front plate 41 which has the through-hole 52 and is connected to the injection cylinder, the movable plate which rotatably supports the screw built in the injection cylinder, the ball nut 50 which is attached to the movable plate, the ball screw 46 which meshes with the ball nut 50 and drives the movable plate 42 in the axial direction X of the screw, the bearing 45 which is attached to the through-hole 52 and rotatably supports the ball screw 46, the support nut 7 which is screwed into the end portion of the through-hole 52 opposite to the ball nut 50, and the plurality of bolts 8 which are supported by the support nut 7. The support nut 7 has a plurality of screw holes 73 arranged in the circumferential direction and penetrating in the axial direction X, and the plurality of bolts 8 mesh with the plurality of screw holes 73 and protrude from the plurality of screw holes 73 to press the bearing 45 in the axial direction X.SELECTED DRAWING: Figure 3
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