Top pouring type pouring tool and method for stainless steel casting

Abstract

The invention relates to the technical field of investment casting, in particular to a tool and method for top pouring type pouring of a stainless steel casting. The tool comprises a supporting plate and four stand columns. A plurality of heat dissipation through holes are distributed in the supporting plate; the four stand columns are vertically installed at the four corners of the supporting plate respectively. A first barrier strip is detachably installed between the two stand columns corresponding to the long side edge of the supporting plate. A second barrier strip is installed between the two stand columns corresponding to the short side edge of the supporting plate. When pouring is carried out, the mold shell is placed on the supporting plate, the supporting plate and the ground are arranged in a spaced mode, the supporting plate is provided with the heat dissipation through holes, the supporting plate has a good heat dissipation effect on the mold shell, it is guaranteed that heat dissipation in a casting is sufficient, and then shrinkage cavities and looseness of the casting are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of investment casting, and in particular to a tool and method for top-casting of stainless steel castings. Background Art

[0002] Investment casting has a wide range of applications in aviation, aerospace, weapons, electronics, shipbuilding and other industries. With the continuous development of casting technology, the requirements for investment casting are becoming higher and higher.

[0003] Combination Figure 1 , Figure 2 The figure shows the schematic diagram of the structure of a hollow structure casting. When performing investment casting, a pouring system is bonded to the wax mold, and a mold shell is prepared and then poured. The casting is performed in the atmosphere without sand filling. Figure 3 shown.

[0004] When pouring without sand filling under atmospheric conditions, the mold shell is placed directly on the ground or on a steel plate for pouring. Figure 1 For hollow structural castings, since the mold shell is in direct contact with the ground or steel plate, the heat dissipation conditions are too poor, and the heat dissipation inside the casting is insufficient, which easily leads to multiple large-area shrinkage cavities and looseness at the inclined surface A of the casting. Summary of the invention

[0005] The main purpose of the present invention is to provide a tool and method for top-casting of stainless steel castings, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a tooling for top-casting of stainless steel castings, comprising a support plate and four columns; a plurality of heat dissipation holes are distributed on the support plate; the four columns are vertically installed at the four corners of the support plate respectively; a first baffle is detachably installed between the two columns corresponding to the long sides of the support plate; and a second baffle is installed between the two columns corresponding to the short sides of the support plate.

[0007] Preferably, the distance H between the support plate and the bottom end of the column is ≥150 mm.

[0008] Preferably, a plurality of first mounting holes are evenly distributed along the vertical direction on the upper portion of each column, and the first mounting holes are used for bolt connection with the first baffle.

[0009] Preferably, the column is made of angle steel; both ends of the second baffle are respectively welded to the column, and the four corners of the support plate are respectively welded to the column.

[0010] Preferably, a reinforcing rod is welded between the middle portion of the short side of the support plate and the middle portion of the second baffle.

[0011] Preferably, a third gear bar is detachably mounted between the tops of the two reinforcing rods.

[0012] Preferably, a plurality of second mounting holes are evenly distributed along the vertical direction on the reinforcing pull rod, and the second mounting holes are used for being bolted to the third gear bar.

[0013] Preferably, the reinforcing rod is made of angle steel.

[0014] On the other hand, the present invention also provides a method for top-casting of stainless steel castings, using the above-mentioned tooling, comprising the following steps:

[0015] S1. Place the tooling on a horizontal surface and remove the first and third bars on the tooling;

[0016] S2, placing the formwork on a support plate;

[0017] S3. According to the size of the formwork, two first stop bars are installed to block the formwork, or one first stop bar and one third stop bar are installed to block the formwork to prevent the formwork from tipping over during pouring. When two first stop bars are installed, or one first stop bar and one third stop bar are installed, the stop bars are required to block the upper half of the formwork;

[0018] S4, pouring the mold shell, and after pouring is completed, removing the first and third stop bars; then the cast mold can be removed.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0020] (1) By adopting the tooling provided by the present invention, the mold shell is placed on a support plate during casting. Since the support plate is spaced apart from the ground and heat dissipation holes are provided on the support plate, the support plate has a good heat dissipation effect on the mold shell, ensuring sufficient heat dissipation inside the casting, thereby avoiding shrinkage cavities and looseness in the casting.

[0021] (2) In the tooling provided by the present invention, by providing the detachable first and third baffles, when placing the mold shell, the first and third baffles can be removed to facilitate the placement of the mold shell. After the mold shell is placed on the support plate, the first and third baffles are installed, and the first and third baffles are used to resist the mold shell, thereby preventing the mold shell from tipping over during the pouring process.

[0022] (3) In the present invention, multiple second mounting holes are evenly distributed along the vertical direction on the reinforcing rod to facilitate adjustment of the installation height of the third stop bar. Similarly, multiple first mounting holes are evenly distributed along the vertical direction on the upper part of each column to facilitate adjustment of the installation height of the first stop bar. This allows the stop bar to be blocked at the upper half of the mold shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional structural diagram of a hollow structural casting;

[0025] Figure 2 It is a cross-sectional view of a hollow structure casting;

[0026] Figure 3 It is a schematic diagram of the mold shell of the hollow structure casting;

[0027] Figure 4 A schematic diagram of a tooling for top-casting of stainless steel castings provided by the present invention;

[0028] Figure 5 This is a schematic diagram of the structure in which the mold shell is placed in the tooling.

[0029] Explanation of the accompanying drawings: 1. Support plate; 1a. Heat dissipation through hole; 2. Post; 2a. First mounting hole; 3. First baffle; 4. Second baffle; 5. Reinforcement rod; 5a. Second mounting hole; 6. Third baffle. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Combination Figure 4 As shown, a tooling for top-casting of stainless steel castings comprises a support plate 1 and four columns 2; a plurality of heat dissipation holes 1a are distributed on the support plate 1; the four columns 2 are respectively vertically installed at the four corners of the support plate 1; a first stopper 3 is detachably installed between two columns 2 corresponding to the long sides of the support plate 1; a second stopper 4 is installed between two columns 2 corresponding to the short sides of the support plate 1. In order to ensure the clearance height formed between the support plate 1 and the ground, the distance H between the support plate 1 and the bottom end of the column 2 is required to be ≥150mm.

[0034] In this embodiment, a plurality of first mounting holes 2a are evenly distributed along the vertical direction on the upper part of each column 2, and the first mounting holes 2a are used for bolting with the first baffle 3. The plurality of first mounting holes 2a arranged vertically facilitate the adjustment of the installation height of the first baffle 3.

[0035] Combination Figure 4 As shown, the column 2 is made of angle steel; the two ends of the second baffle 4 are respectively welded to the column 2, and the four corners of the support plate 1 are respectively welded to the column 2. Specifically, a first mounting hole 2a is provided on one side wall of the angle steel, and the other side wall is conveniently welded to the second baffle 4.

[0036] In order to increase the stability of the entire tooling, a reinforcing rod 5 is welded between the middle of the short side of the support plate 1 and the middle of the second bar 4. Furthermore, a third bar 6 is detachably installed between the tops of the two reinforcing rods 5. A plurality of second mounting holes 5a are evenly distributed along the vertical direction on the reinforcing rod 5, and the second mounting holes 5a are used for bolting with the third bar 6. The plurality of second mounting holes 5a arranged vertically facilitate the adjustment of the installation height of the third bar 6. The reinforcing rod 5 is made of angle steel. Angle steel is easy to obtain.

[0037] On the other hand, this embodiment also provides a method for top-casting of stainless steel castings, using the above-mentioned tooling, comprising the following steps:

[0038] S1. Place the tooling on a horizontal ground, and remove the first stop bar 3 and the third stop bar 6 on the tooling.

[0039] S2. Place the formwork on the support plate 1.

[0040] S3. According to the size of the formwork, choose to install two first stop bars 3 to block the formwork, or install one first stop bar 3 and one third stop bar 6 to block the formwork to prevent the formwork from tipping over during pouring; when installing two first stop bars 3, or installing one first stop bar 3 and one third stop bar 6, the stop bars are required to block the upper half of the formwork.

[0041] S4, pouring the mold shell, after pouring is completed, remove the first stop bar 3 and the third stop bar 6; then the cast mold can be removed.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A tool for top-casting of stainless steel castings, characterized in that: It comprises a support plate (1) and four columns (2); a plurality of heat dissipation holes (1a) are distributed on the support plate (1); Four upright posts (2) are respectively installed vertically at the four corners of the support plate (1); A first stop bar (3) is detachably installed between two upright posts (2) corresponding to the long sides of the support plate (1); and a second stop bar (4) is installed between two upright posts (2) corresponding to the short sides of the support plate (1).

2. A tool for top pouring of stainless steel castings as claimed in claim 1, characterized in that: The distance H between the support plate (1) and the bottom end of the column (2) is ≥150 mm.

3. A tool for top pouring of stainless steel castings as claimed in claim 1, characterized in that: A plurality of first mounting holes (2a) are evenly distributed along the vertical direction on the upper part of each upright column (2), and the first mounting holes (2a) are used for bolt connection with the first blocking bar (3).

4. A tool for top pouring of stainless steel castings as claimed in claim 1, characterized in that: The column (2) is made of angle steel; the two ends of the second baffle (4) are respectively welded to the column (2); and the four corners of the support plate (1) are respectively welded to the column (2).

5. A tool for top pouring of stainless steel castings as claimed in claim 1, characterized in that: A reinforcing rod (5) is welded between the middle portion of the short side of the support plate (1) and the middle portion of the second baffle (4).

6. A tool for top pouring of stainless steel castings as claimed in claim 5, characterized in that: A third gear bar (6) is detachably mounted between the tops of the two reinforcing pull rods (5).

7. A tool for top pouring of stainless steel castings as claimed in claim 6, characterized in that: A plurality of second mounting holes (5a) are evenly distributed along the vertical direction on the reinforcing pull rod (5), and the second mounting holes (5a) are used for bolt connection with the third gear bar (6).

8. A tool for top pouring of stainless steel castings as claimed in claim 5, characterized in that: The reinforcing pull rod (5) is made of angle steel.

9. A method for top pouring of stainless steel castings, characterized in that: The tooling according to claim 6 comprises the following steps: S1. Place the tool on a horizontal surface and remove the first stop bar (3) and the third stop bar (6) on the tool; S2, placing the mold shell on the support plate (1); S3. Depending on the size of the formwork, two first stop bars (3) are installed to block the formwork, or one first stop bar (3) and one third stop bar (6) are installed to block the formwork, so as to prevent the formwork from tipping over during pouring; S4, pouring the mold shell, and after the pouring is completed, removing the first stop bar (3) and the third stop bar (6); the poured mold can be removed.

10. A method for top pouring of stainless steel castings as claimed in claim 9, characterized in that: In the step S3, when installing two first stop bars (3), or installing one first stop bar (3) and one third stop bar (6), it is required that the stop bars are located at the upper half of the mold shell.

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