Piston manufacturing method

The method for manufacturing pistons with internal spaces filled with granular material and intersecting beam and column members addresses the challenge of particle aggregation, enabling mass production and effective vibration suppression.

JP7875445B2Active Publication Date: 2026-06-18MAZDA MOTOR CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MAZDA MOTOR CORP
Filing Date
2022-09-20
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing methods for manufacturing pistons fail to address the need for pistons with both weight reduction and vibration suppression, with a focus on both weight and vibration suppression, leading to ineffective vibration damping due to particle aggregation.

⚗Method used

A method for manufacturing pistons with a space filled with granular material, using a core preparation step to form intersecting beam and column members within the piston, allowing for effective aggregation and vibration suppression and damping structures to intersecting beam and column members, intersecting the beam and column members, and intersecting the piston's motion direction, allowing for effective vibration damping and intersecting the piston's motion, intersecting the beam and column members, and intersecting the piston's motion direction, allowing for effective vibration damping.

🎯Benefits of technology

The method enables mass production of pistons with internal spaces filled with granular material and an agglomeration-suppressing structure, effectively suppressing vibrations and enhancing damping effects by promoting granular material dispersion.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a piston manufacturing method capable of mass manufacturing pistons whose space parts are filled with particles and which have an aggregation restraining structure.SOLUTION: In a piston manufacturing method, first plural blocks 101-114 having a three-dimensional shape made by solidifying a mixture of water and a particulate matter and having grooves 121-123 concaved on sides are prepared. The plural blocks 101-114 are overlaid on each other, so as to prepare a core 100 having a first through hole 131, a second through hole 132 and a third through hole 133. The core 100 is arranged inside a cavity and clamped. Molten metal is injected in the cavity and the first through hole 131, the second through hole 132 and the third through hole 133 of the core 100. By solidifying the molten metal, a piston body 20 having the space part 30 is formed. At the same time, a first beam member 51, a second beam member 52 and a column member 52 are formed. Finally, water is discharged from the space part 30 of the piston body 20.SELECTED DRAWING: Figure 7
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