CN203281815U

CN203281815U - Core assembly structure of precoated sand core of pump body casting

Info

Publication number: CN203281815U
Application number: CN2013202458655U
Authority: CN
Inventors: 王建明
Original assignee: JIANGSU LIYUAN JINHE CASTING CO Ltd
Current assignee: JIANGSU LIYUAN JINHE CASTING CO Ltd
Priority date: 2013-05-09
Filing date: 2013-05-09
Publication date: 2013-11-13
Anticipated expiration: 2023-05-09

Abstract

The utility model relates to a core assembly structure of a precoated sand core of a pump body casting. The innovation points of the core assembly structure are as follows: the sand core adopts a split-type core assembly structure and comprises a first sand core, a second sand core and a third sand core which are connected and fixed through concave-convex positioning grooves, wherein the first sand core forms casting holes in the two sides, a middle cavity, partial appearances of bottoms of diamond-shaped bulges on the two sides and lower parts of a left core head and a right core head of the casting; the second sand core forms the partial appearance of the top of the diamond-shaped bulge on the left side, the upper part of the left core head and an upper protruded sand shape-perfecting part at the lower part of the casting; the third sand core forms the partial appearance of the top of the diamond-shaped bulge on the right side and the upper part of the right core head. The core assembly structure has the advantages that a core box is convenient to manufacture; the using amount of loose pieces is the least during core manufacturing, the operation is simple and convenient, and the core production efficiency is improved; a protruded sand shape-perfecting core replaces protruded molding sand, so that concave-convex parting of a sand mold is avoid, and protruded sand is further avoided, so that the molding quality is stable, and dimensional accuracy and surface quality of the casting are ensured.

Description

A kind of pump housing foundry goods precoated sand core core assembly structure

Technical field

The utility model relates to a kind of sand core structure, particularly a kind of pump housing foundry goods precoated sand core core assembly structure.

Background technology

When making pump housing foundry goods, as shown in Figure 1, 2, respectively there is a rhombus projection a both sides to its design feature, and in routine casting, both sides need the concavo-convex somatotype of sand mold, codded and formed rhombus projection profile by molding sand, this just may cause casting dimension accuracy and surface quality of continuous castings unstable; Also have 2 blowhole b left and right core prints herein, in the manufacturing process of loam core, required loose piece is more, and production process is complicated, wastes time and energy, and has increased cost.

Summary of the invention

The technical problems to be solved in the utility model is to provide and a kind ofly guarantees that casting dimension accuracy, coremaking facilitate the pump housing foundry goods precoated sand core core assembly structure of efficiency.

For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of pump housing foundry goods precoated sand core core assembly structure, its innovative point is: described core is split core assembly structure, and it comprises the first core, the second core and the 3rd core, and by by concavo-convex locating slot, being connected and fixed; The first core forms the bottom of both sides blowhole, middle chamber, both sides rhombus projection base section profile and the left and right core print of foundry goods; Cod and mend the shape part in the second core formation foundry goods left side rhombus convex top part profile, left core print top and top, foundry goods below; The 3rd core forms right side rhombus convex top part profile and right core print top.

The utility model has the advantage of: core box is easily manufactured; The coremaking process is used the loose piece minimum number, and is easy and simple to handle, improved coremaking production efficiency; The benefit of codding core has replaced molding sand to cod, and has avoided the concavo-convex somatotype of sand mold, has also just avoided codding, thereby has made molding quality stable, guarantees dimensional accuracy and the surface quality of continuous castings of foundry goods.

Description of drawings

Fig. 1 is valve body moulding front view in the utility model.

Fig. 2 is valve body moulding rearview in the utility model.

Fig. 3 is the utility model middle pump body foundry goods precoated sand core core assembly structure.

The specific embodiment

As shown in Figure 3, core is split core assembly structure, comprise blowhole core, rhombus projection embedded core, left and right core print and the benefit core of codding, blowhole core, rhombus projection embedded core, left and right core print and the benefit core of codding first combine, specifically be split as again the first core 1, the second core 2 and the 3rd core 3, and by by concavo-convex locating slot 4, being connected and fixed.

The first core 1 forms the bottom of both sides blowhole, middle chamber, both sides rhombus projection base section profile and the left and right core print of foundry goods; Cod and mend the shape part in the second core 2 formation foundry goods left side rhombus convex top part profiles, left core print top and top, foundry goods below; The 3rd core 3 forms right side rhombus convex top part profile and right core print top.Core box just can be avoided too much concavo-convex somatotype like this, reduce loose piece, be convenient to the core box manufacturing, coremaking is easy and simple to handle, improves the core make efficiency, and the benefit of codding core replaces molding sand to cod, avoided the concavo-convex somatotype of sand mold, avoid molding sand to cod, improved surface quality of continuous castings, guaranteed foundry goods relative dimensions precision.

Claims

1. pump housing foundry goods precoated sand core core assembly structure, it is characterized in that: described core is split core assembly structure, and it comprises the first core, the second core and the 3rd core, and by by concavo-convex locating slot, being connected and fixed; The first core forms the bottom of both sides blowhole, middle chamber, both sides rhombus projection base section profile and the left and right core print of foundry goods; Cod and mend the shape part in the second core formation foundry goods left side rhombus convex top part profile, left core print top and top, foundry goods below; The 3rd core forms right side rhombus convex top part profile and right core print top.