Molding sand mold of circular ring type casting

Abstract

The utility model discloses a molding sand mold of a circular ring type casting. Comprising an upper box sand box, a lower box sand box, a lower box sand mold, an upper box sand mold, a riser table, an exothermic riser and a sand core, wherein the upper box sand box and the lower box sand box are fixed up and down; the lower box sand mold is filled in the lower box sand box; the upper box sand mold is filled in the upper box sand box; the upper sand box and the lower sand box are fixed to define a casting cavity matched with a casting; a heating insulation board mounting cavity which is communicated with each heating riser and is completely connected with the casting upper cavity is further processed below each heating riser, and a heating insulation board is mounted in each heating insulation board mounting cavity. According to the molding sand mold disclosed by the utility model, the solidification feeding process of a casting is realized by combining the heating and heat-insulating characteristics of the heating and heat-insulating plate with high-temperature liquid metal at the top riser, and the cleaning efficiency of the casting is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a molding sand mould of circular ring castings and belongs to the technical field of casting. BACKGROUND

[0002] In the traditional casting industry, there are many kinds of circular ring castings, such as a simple casting of a single circular ring, a pipe casting of two circular rings, multiple circular rings, and a complex casting with a circular ring structure. In actual casting production, the position of the circular ring varies in different castings. After the parting surface is determined, the circular ring can be placed horizontally or vertically. The inconsistent shapes result in different feeding modes.

[0003] Manufacturers generally have the following solutions for the casting production process of circular ring castings.

[0004] 1. Horizontally placed circular ring. The casting process directly designs riser tables, risers, and chills on the surface of the circular ring casting, designs deformation prevention and machining allowances, and designs the size of the ingates and runners according to the shape of the circular ring. The feature is that the operation mode is relatively simple, but the circular ring casting requires a simple structure, and the circular ring structure of a complex casting can only be partially divided and molded. The final product is connected to the main body through welding to form a casting.

[0005] 2. Vertically placed circular ring. The casting process designs metal patches, riser tables, risers, and chills according to the size of the circular ring, designs deformation prevention and machining allowances, and designs ingates and runners according to the main structure of the casting. The feature is that the molding operation is relatively simple, and the metal patch cleaning process is time-consuming and inefficient, especially for high-hardness metal patches. INVENTION CONTENTS

[0006] The utility model aims at solving the problem of difficult cleaning of metal patches in the traditional molding scheme of circular ring castings and provides a molding sand mould of circular ring castings.

[0007] The utility model aims to achieve the following technical solutions:

[0008] The utility model relates to a molding sand mould of circular ring castings and belongs to the technical field of casting.

[0009] The lower part of the upper sand mould is provided with an upper casting cavity, and the upper part of the lower sand mould is provided with a lower casting cavity.

[0010] The lower part of the heating riser is communicated with the upper casting cavity.

[0011] After the upper sand box and the lower sand box are fixed, the upper cavity of the casting and the lower cavity of the casting form a casting cavity that matches the casting.

[0012] Below each heating riser, there is a heating insulation plate mounting cavity that communicates with the heating riser and is completely connected to the upper cavity of the casting, and a heating insulation plate is installed in the heating insulation plate mounting cavity;

[0013] The thickness of the heating and insulation plate is not less than 0.8 times the thinnest dimension of the cavity position on the casting. The vertical height of the heating and insulation plate is not less than the distance from the heating riser to the sand core. The horizontal width of the heating and insulation plate is not less than the horizontal dimension of the cavity position on the casting.

[0014] The heating and insulation board is made of aluminum silicate material or ceramic fiber material.

[0015] Beneficial effects:

[0016] The molding sand mold of this utility model has a cavity for installing a heating and insulation plate at the metal patch position in the original casting process. The heating and insulation properties of the heating and insulation plate, combined with the high temperature liquid metal at the top riser, realize the solidification and feeding process of the casting. After casting is completed, the cleaning worker can directly remove the casting by shot blasting, which greatly reduces the cleaning, cutting and grinding time, improves the efficiency of casting cleaning, and also reduces the labor intensity of workers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the molding sand mold of this utility model;

[0018] In the diagram, 1-heating insulation plate, 2-riser platform, 3-heating riser, 4-upper box sand mold, 5-upper cavity of casting, 6-sand core, 7-lower cavity of casting, 8-lower box sand mold, 9-upper box sand box, 10-lower box sand box. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Example

[0021] This utility model provides a molding sand mold for a ring-shaped casting, such as... Figure 1 As shown, it includes an upper sand box 9 and a lower sand box 10 fixed at the top and bottom, a lower sand mold 8 filled in the lower sand box 10, an upper sand mold 4 filled in the upper sand box 9, a riser platform 2 and a heating riser 3 installed above the upper sand mold 4, and a sand core 6 installed between the upper sand mold 4 and the lower sand mold 8.

[0022] The upper sand mold 4 is provided with an upper mold cavity 5 below, and the lower sand mold 8 is provided with a lower mold cavity 7 above;

[0023] The lower part of the heat generating riser 3 is communicated with the upper mold cavity 5;

[0024] After the upper sand box 9 and the lower sand box 10 are fixed, the upper mold cavity 5 and the lower mold cavity 7 form a casting mold cavity matched with the casting;

[0025] The lower part of each heat generating riser 3 is further provided with a heat generating insulation plate mounting cavity communicated with the heat generating riser 3 and completely connected with the upper mold cavity 5, and a heat generating insulation plate 1 is mounted in the heat generating insulation plate mounting cavity;

[0026] The thickness of the heat generating insulation plate 1 is not less than 0.8 times of the thinnest dimension of the upper mold cavity 5, the vertical height of the heat generating insulation plate 1 is not less than the distance from the heat generating riser 3 to the sand core 6, and the lateral width of the heat generating insulation plate 1 is not less than the lateral dimension of the upper mold cavity 5;

[0027] The heat generating insulation plate is made of aluminum silicate product material or ceramic fiber material.

Claims

1. A molding sand mold for a torus type casting, comprising an upper sand box and a lower sand box fixed in place, a lower sand mold filled in the lower sand box, an upper sand mold filled in the upper sand box, a riser table and a heat generating riser installed above the upper sand mold, and a sand core installed between the upper sand mold and the lower sand mold. A casting upper mold cavity is formed in the lower part of the upper sand mold, and a casting lower mold cavity is formed in the upper part of the lower sand mold. The lower part of the heat generating riser is communicated with the casting upper mold cavity. characterized in that After the upper sand box and the lower sand box are fixed, the casting upper mold cavity and the casting lower mold cavity enclose a casting mold cavity matching the casting. A heat generating heat retaining plate installation cavity is formed in the lower part of each heat generating riser, communicated with the heat generating riser and completely connected with the casting upper mold cavity, and a heat generating heat retaining plate is installed in the heat generating heat retaining plate installation cavity. The thickness of the heat generating heat retaining plate is not less than 0.8 times the thinnest dimension of the position of the casting upper mold cavity, the vertical height of the heat generating heat retaining plate is not less than the distance from the heat generating riser to the sand core, and the lateral width of the heat generating heat retaining plate is not less than the lateral dimension of the position of the casting upper mold cavity.

2. A sand mold for forming a ring-shaped casting according to claim 1, wherein The heat generating heat retaining plate is made of aluminum silicate product material or ceramic fiber material.

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