Molding method of combustion engine horn-shaped protective cover casting

By using single-box casting technology and bottom-pouring gating system, the problems of sand holes, sand inclusions and porosity in the horn-shaped protective cover castings were solved, achieving high-quality casting production, simplifying the process and improving dimensional accuracy.

CN115229130BActive Publication Date: 2026-05-29SICHUAN JINLEI CASTING
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN JINLEI CASTING
Filing Date
2022-07-19
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional casting methods are difficult to effectively avoid defects such as sand holes, sand inclusions, and air holes in horn-shaped protective cover castings, and the production process is complex, time-consuming, and has poor dimensional accuracy.

Method used

The single-box casting technology is adopted, combined with the parallel design of the sand core pattern and the horizontal inner cavity bottom surface. The bottom pouring gating system is used, and feeding risers and top box slabs are set in the mold to avoid difficulties in closing the mold and casting defects caused by uneven parting surface.

Benefits of technology

It simplifies the production process, improves the quality and dimensional accuracy of castings, reduces casting defects, and ensures the stability of the pouring process and the cleanliness of castings.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN115229130B_ABST
    Figure CN115229130B_ABST
Patent Text Reader

Abstract

The application discloses a molding method of a horn-shaped protective cover casting of a gas turbine, the shape of the casting is flat horn-shaped, the inside of the casting is a hollow structure, one end of the casting is a cover opening, the lower part of the small caliber of the cover opening is a cover neck part, the cross section of the cover neck part is elliptical, the structure is a columnar body with uneven wall thickness in each section, the included angle a between the central axis of the columnar body and the normal line of the cross section of the cover opening is an acute angle, the upper surface of the columnar body and the bottommost cross section of the cover opening form a certain included angle, a protruding annular body in the inside of the cover neck part divides the casting into a first casting body and a second casting body, the structure of the casting model for forming the casting mold comprises a mold plate and a mold sample fixedly installed on the mold plate, the structure of the mold sample comprises a sand core mold sample for forming a sand core cavity and directly installed on the mold plate, and a mold mold sample for forming the outer contour of the casting and the inner cavity structure of the first casting body and located above the sand core mold sample and in an integrated structure with the sand core mold sample.
Need to check novelty before this filing date? Find Prior Art