A cast sand mold structure for a diesel engine piston
By designing an annular concave and convex riser cap structure in diesel engine piston casting, the problems of riser material waste and casting defects were solved, achieving cost reduction and quality improvement.
CN224543057UActive Publication Date: 2026-07-24GUANGZHOU OUSAI PISTON CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU OUSAI PISTON CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
In existing diesel engine piston casting, the design of risers leads to material waste and increased costs, and there is also a risk of casting defects.
Method used
An annular concave design is incorporated at the contact surface between the bottom of the feeding block and the top of the riser cover, while an annular protrusion and vent holes are provided at the bottom of the riser cover. This integrated molding structure reduces the contact area and enhances the structural strength.
Benefits of technology
It reduced the cost of production materials, avoided casting defects, and improved casting quality and production efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224543057U_ABST
Abstract
The utility model discloses a diesel engine piston casting sand type structure, including the riser cap, the riser cap is circular board shape, the riser cap central position top is fixedly connected with the supplementary shrink top block, and the supplementary shrink top block bottom is contacted with the riser cap top surface and is provided with annular recess, the outer side wall fixedly connected with the annular protrusion of riser cap bottom position, is provided with a plurality of ring -shaped setting gas hole on the annular protrusion, the top area of the riser cap connection of annular protrusion adopts the outer circle chamfer structure design, and the bottom area of annular protrusion and the connection of riser cap adopts the inner circle chamfer structure design, and this top outer circle chamfer and bottom inner circle chamfer structure design make the connecting part of annular protrusion and riser cap more smooth transition, reduce the stress concentration phenomenon, and the annular recess of original technology improvement addition is set up in the supplementary shrink top block bottom and the riser cap top surface, is used for reducing the contact area, reduces the material cost.
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