CN210387441U

CN210387441U - Precision casting mould

Info

Publication number: CN210387441U
Application number: CN201921239916.7U
Authority: CN
Inventors: 王兴贤
Original assignee: Xiangshan Zhongyu Mould Co ltd
Current assignee: Xiangshan Zhongyu Mould Co ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-24
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a precision casting mould, which comprises an upper mould and a lower mould, wherein a plurality of spiral movable blocks are arranged between the upper mould and the lower mould and are closely arranged along the circumferential direction; a pore-forming assembly is arranged at the central position of the upper die and the lower die, and comprises a filling block, a middle forming block, a left forming block, a right forming block and a fixing ring, wherein the middle forming block, the left forming block and the right forming block are two and are symmetrically arranged relative to the filling block, and the two groups of middle forming blocks, the left forming block and the right forming block are arranged around the filling block and are sleeved outside the filling block through the fixing ring for fixing; the middle forming block extends from the side surface to form a middle bump, the left forming block extends from the side surface to form a left bump, and the right forming block extends from the side surface to form a right bump. The method has the advantages of being used for forming the impeller wax mold, convenient to form and high in forming quality.

Description

Precision casting mould

Technical Field

The utility model relates to the field of molds, concretely relates to precision casting mould.

Background

Sand casting refers to a casting process that produces a casting in a sand mold. Steel, iron and most nonferrous metal castings can be obtained by sand casting. The molding material used for sand casting is cheap and easy to obtain, the casting mould is simple and convenient to manufacture, and the casting mould can adapt to single-piece production, batch production and mass production of castings, and is a basic process in casting production for a long time.

The precision casting mould is a special mould for precision casting, and is required to be more precise than a common casting mould. Precision casting is a casting method relative to conventional casting processes. It can obtain relatively accurate shape and high casting precision. The more common method is as follows: firstly, designing and manufacturing a mould (with very small allowance or no allowance) according to the product requirement, and casting wax by using a casting method to obtain an original wax mould; repeating the steps of coating and sanding on the wax mould, hardening the shell and drying; then dissolving the wax mould inside to remove the wax mould, namely dewaxing to obtain a cavity; firing the shell to obtain sufficient strength; pouring the required metal material; removing sand after shelling, thereby obtaining a finished product with high precision.

The impeller is generally manufactured by a precision casting mould due to higher precision requirement. Before casting the impeller, a wax mold of the impeller model is formed. As shown in fig. 1 and 2, an impeller wax mold (100) is shown, which is difficult to form due to the curved surface structure of the blade (101) and the formation of the key slot (103) in the mounting hole (102).

Therefore, it is an urgent need to solve the problem of the art how to design a precision casting mold for molding the impeller wax mold in view of the molding difficulty of the impeller wax mold.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be used for shaping impeller wax matrix, and the shaping is convenient, the high precision casting mould of shaping quality.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a kind of precision casting mould, including upper mould and lower mould, characterized by that: a plurality of spiral movable blocks are arranged between the upper die and the lower die, are closely arranged along the circumferential direction, are matched with the upper die and the lower die and are used for forming blades;

a hole forming assembly is arranged at the central position of the upper die and the lower die, the hole forming assembly comprises a filling block, a middle forming block, a left forming block, a right forming block and a fixing ring, the middle forming block, the left forming block and the right forming block are two and are symmetrically arranged relative to the filling block, the two groups of middle forming blocks, the left forming block and the right forming block are arranged around the filling block and are sleeved outside through the fixing ring for fixing, and the filling block, the middle forming block, the left forming block and the right forming block form a cylindrical structure and are used for forming an installation hole; the middle forming block is provided with a middle convex block extending from the side surface, the left forming block is provided with a left convex block extending from the side surface, the right forming block is provided with a right convex block extending from the side surface, and the middle convex block, the left convex block and the right convex block on the two sides form two groups of key structures for forming two key grooves.

Preferably, the filling block cross-section is the rectangle, both sides the middle shaping piece hugs closely both sides around the filling block, both sides the left side shaping piece is laminated mutually, just the left side shaping piece is hugged closely the filling block with the right side limit of middle shaping piece, both sides the right side shaping piece is laminated mutually, just the right side shaping piece is hugged closely the filling block with the left side limit of middle shaping piece. The structure and the arrangement mode are very convenient to install and disassemble.

Compared with the prior art, the utility model has the advantages of it is following: when the dies are assembled, after a plurality of spiral movable blocks and pore-forming components are installed, the upper die and the lower die are closed; during the die sinking, upwards moving away the mould along vertical direction earlier, take out a plurality of spiral movable blocks along the circumferencial direction in proper order again, then carry out following action in proper order: and taking down the fixing ring, pulling out the filling block, pulling out the middle forming block after inwards moving along the front-back direction, and pulling out the left and right forming blocks after inwards moving along the left-right direction, so that the demoulding action of the pore-forming assembly is completed, and finally the impeller wax mould is taken down from the lower mould.

The precision casting mould of the scheme has the advantages of simple structure, convenience in operation, high forming efficiency and good forming quality.

Drawings

Fig. 1 and 2 are schematic perspective views of an impeller wax mold according to the present invention;

fig. 3 is a schematic perspective view of a preferred embodiment of the present invention (upper mold, the same below is not shown);

fig. 4 is a top view of a preferred embodiment according to the present invention;

fig. 5 is an exploded view of a preferred embodiment according to the present invention;

FIG. 6 is a perspective view of a hole forming assembly according to a preferred embodiment of the present invention;

FIG. 7 is a top view of a hole forming assembly according to a preferred embodiment of the present invention;

FIG. 8 is an exploded view of a hole forming assembly according to a preferred embodiment of the present invention;

fig. 9 is a perspective view illustrating an impeller wax pattern according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

As shown in fig. 3 to 9, in order to provide a preferred embodiment of the present invention, the present invention includes an upper mold and a lower mold 1 (the upper mold and the lower mold are structures close to mirror images, and the inner structure of the present embodiment is shown more clearly, so the upper mold structure is not shown in the drawings), a plurality of spiral movable blocks 2 are provided between the upper mold and the lower mold 1, and the plurality of spiral movable blocks 2 are closely arranged along the circumferential direction and are matched with the upper mold and the lower mold 2 to form the blade 101.

The central positions of the upper die and the lower die 2 are provided with a pore-forming component 3, the pore-forming component 3 comprises a filling block 31, a middle forming block 32, a left forming block 33, a right forming block 34 and a fixing ring 35, the middle forming block 32, the left forming block 33 and the right forming block 34 are two and are symmetrically arranged relative to the filling block 31, the two groups of middle forming blocks 32, the left forming block 33 and the right forming block 34 are arranged around the filling block 31 in a surrounding manner and are sleeved outside through the fixing ring 35 for fixing, and the filling block 31, the middle forming block 32, the left forming block 33 and the right forming block 34 form a cylindrical structure and are used for forming the mounting hole 102; the middle convex block 321 extends from the side surface of the middle forming block 32, the left convex block 331 extends from the side surface of the left forming block 33, the right convex block 341 extends from the side surface of the right forming block 34, and the middle convex block 321, the left convex block 331 and the right convex block 341 on the two sides form two groups of key-shaped structures for forming the two key slots 103.

In this embodiment, the section of the filling block 31 is rectangular, the middle molding blocks 32 on both sides are tightly attached to the front and rear sides of the filling block 31, the left molding blocks 33 on both sides are attached to each other, the left molding blocks 33 are tightly attached to the right sides of the filling block 31 and the middle molding blocks 32, the right molding blocks 34 on both sides are attached to each other, and the right molding blocks 34 are tightly attached to the left sides of the filling block 31 and the middle molding blocks 32.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A kind of precision casting mould, including upper mould and lower mould, characterized by that: a plurality of spiral movable blocks are arranged between the upper die and the lower die, are closely arranged along the circumferential direction, are matched with the upper die and the lower die and are used for forming blades;

2. A precision casting mold according to claim 1, wherein: the filling block cross-section is the rectangle, both sides middle shaping piece hugs closely both sides, both sides around the filling block left side shaping piece laminates mutually, just left side shaping piece hugs closely the filling block with the right side limit of middle shaping piece, both sides right side shaping piece laminates mutually, just right side shaping piece hugs closely the filling block with the left side limit of middle shaping piece.