CN215587779U

CN215587779U - Investment casting wax pattern core

Info

Publication number: CN215587779U
Application number: CN202121861325.0U
Authority: CN
Inventors: 宋宏宝
Original assignee: Guizhou Anji Aviation Precision Casting Co Ltd
Current assignee: Guizhou Anji Aviation Precision Casting Co Ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-01-21
Anticipated expiration: 2031-08-10

Abstract

The utility model relates to an investment casting wax pattern core, which comprises a core bar and a core shell, wherein the core bar is made of metal, the core shell is made of water-soluble material, and the core shell is wrapped on the outer surface of the core bar. By adopting the technical scheme of the utility model, the steel core bone is embedded in the core shell made of the water-soluble material, the integral strength and the bearing capacity of the core are increased, the core can bear enough injection impact force from the wax material in the process of preparing the wax module, the core is prevented from being broken, the molding quality of the wax module is ensured, and a foundation is laid for the subsequent processes of preparing the shell, pouring the metal material and the like.

Description

Investment casting wax pattern core

Technical Field

The utility model relates to the technical field of investment casting process equipment, in particular to an investment casting wax pattern core.

Background

In the investment casting process, firstly, a wax mould is prepared according to the shape of a product, then, refractory coating is coated on the outer surface of the wax mould, then, a shell is prepared after the wax mould is removed by roasting and melting, then, a metal material which is melted into liquid state is poured into the shell, a casting is obtained after the metal material is condensed, along with the continuous development of the casting process technology, the shape of the casting product is increasingly complex, the functional requirement on the casting product is higher and higher, for a type of casting with a cavity structure inside, a core is required to be filled inside the wax mould in the forming casting process, the core cannot be melted in the roasting process, and the core is taken out after the metal material pouring process is completed, so that a corresponding cavity structure can be formed inside the casting, when the core made of the water-soluble material is actually used, because the water-soluble material is generally brittle and has low hardness, after the core made of the water-soluble material is placed in the process of preparing the wax mould, the core made of the water-soluble material is subjected to injection impact of the wax material and is easy to break, so that the molding quality of the wax mould is influenced, and the subsequent processes of preparing a shell, pouring a metal material and the like are further influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a wax pattern core for investment casting.

The utility model provides an investment casting wax pattern core which comprises a core bar and a core shell, wherein the core bar is made of metal, the core shell is made of water-soluble material, and the core shell is wrapped on the outer surface of the core bar.

The two ends of the core rod respectively extend to be flush with the outer surface of the core shell.

Core heads are fixedly connected to two ends of the core rod, and the core heads are made of metal.

The core rod or the core head is made of steel.

The core head extends out of two ends of the core rod by 20mm to 50 mm.

The core head and the core bar are fixedly connected together through a thread pair.

The core rod is in a long rod shape with a circular cross section.

The length of the core rod is not less than 100 mm.

The outer diameter of the core rod is not more than 40 mm.

The utility model has the beneficial effects that: by adopting the technical scheme of the utility model, the steel core bone is embedded in the core shell made of the water-soluble material, the integral strength and the bearing capacity of the core are increased, the core can bear enough injection impact force from the wax material in the process of preparing the wax module, the core is prevented from being broken, the molding quality of the wax module is ensured, and a foundation is laid for the subsequent processes of preparing the shell, pouring the metal material and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1-core rod, 2-core shell, 3-core head and 4-wax module (4).

Detailed Description

The technical solution of the present invention is further explained with reference to the accompanying drawings, but the claimed protection scope is not limited thereto;

the utility model provides an investment casting wax pattern core, as shown in figure 1, the investment casting wax pattern core is used for being placed in a wax module 44 in the process of preparing the wax module 44, the investment casting wax pattern core comprises a core rod 1 and a core shell 2, the core rod 1 is made of metal, the core shell 2 is made of water-soluble material, and the core shell 2 is wrapped on the outer surface of the core rod 1.

Furthermore, the two ends of the core rod 1 respectively extend to be flush with the outer surface of the core shell 2. Therefore, after the wax mould 4 is injection-molded, the core rod 1 can be conveniently extracted by applying acting force to the two ends of the core rod 1 for repeated use.

In addition, core heads 3 are fixedly connected to two ends of the core rod 1, and the core heads 3 are made of metal. The material of the core rod 1 or the core print 3 is preferably steel. The core print 3 extends 20mm to 50mm from the two ends of the core rod 1. The core print 3 and the core rod 1 are fixedly connected together through a thread pair. Therefore, after the wax mould 4 is injection-molded, the core rod 1 and the core head 3 can be conveniently extracted out simultaneously by applying acting force on the core head 3 for repeated use.

Further, the core bar 1 is in the shape of a long rod having a circular cross section. The length of the core rod 1 is not less than 100 mm. The outer diameter of the core rod 1 is not more than 40 mm.

By adopting the technical scheme of the utility model, the steel core is embedded in the core shell made of the water-soluble material, the integral strength and the bearing capacity of the core are increased, the core can bear enough injection impact force from the wax during the process of preparing the wax module 4, the core is prevented from being broken, the molding quality of the wax module 4 is ensured, and a foundation is laid for the subsequent processes of preparing the shell, pouring the metal material and the like, in addition, the steel core can be extracted out after the preparation of the wax module 4 is finished, so that the steel core can be repeatedly used, the raw material can be saved, and the use efficiency of the core can be improved.

Claims

1. The utility model provides an investment casting wax matrix core which characterized in that: the core-shell composite material comprises a core rod (1) and a core shell (2), wherein the core rod (1) is made of metal, the core shell (2) is made of water-soluble material, and the core shell (2) is wrapped on the outer surface of the core rod (1).

2. The investment casting wax pattern core of claim 1, wherein: the two ends of the core rod (1) are respectively extended to be flush with the outer surface of the core shell (2).

3. The investment casting wax pattern core of claim 2, wherein: the core is characterized in that core heads (3) are fixedly connected to two ends of the core rod (1), and the core heads (3) are made of metal.

4. The investment casting wax pattern core of claim 3, wherein: the core rod (1) or the core head (3) is made of steel.

5. The investment casting wax pattern core of claim 3, wherein: the core print (3) extends out of the two ends of the core rod (1) by 20mm to 50 mm.

6. The investment casting wax pattern core of claim 3, wherein: the core head (3) and the core rod (1) are fixedly connected together through a thread pair.

7. The investment casting wax pattern core of claim 1, wherein: the core rod (1) is in a long rod shape with a circular cross section.

8. The investment casting wax pattern core of claim 7, wherein: the length of the core rod (1) is not less than 100 mm.

9. The investment casting wax pattern core of claim 7, wherein: the outer diameter of the core rod (1) is not more than 40 mm.