Pouring system for improving looseness of ZL205A aluminum alloy casting

Abstract

The invention relates to the technical field of casting, in particular to a pouring system for improving looseness of a ZL205A aluminum alloy casting, the pouring system comprises a straight pouring gate, a transverse pouring gate and a plurality of inner pouring gates, the number of the inner pouring gates is multiple, and the inner pouring gates are annularly and uniformly distributed on the upper end face of a casting wax mold; an annular pouring gate is adhered to the top surfaces of the plurality of inner pouring gates; the plurality of cross runners are arranged in a crossed manner, and the lower surfaces of the cross runners are connected with the upper surface of the annular runner; the lower end of the straight pouring gate is connected with the crossed part of the plurality of transverse pouring gates; in the vertical direction, the connecting part of the transverse pouring gate and the annular pouring gate is staggered from the connecting part of the inner pouring gate and the annular pouring gate, so that molten metal can be prevented from directly entering a wax mold from the transverse pouring gate through the inner pouring gate, an overheated area formed by direct impact of the molten metal is avoided, the problem of casting looseness is thoroughly solved, and qualified castings are obtained.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to a pouring system for improving the looseness of ZL205A aluminum alloy castings. Background Art

[0002] Aluminum alloy investment castings are of various types and complex structures, and the requirements for internal metallurgical quality and performance are getting higher and higher. Among them, ZL205A alloy is an AL-Cu series multi-component high-strength cast aluminum alloy with excellent room temperature and high temperature mechanical properties and good cutting performance, but poor casting performance. ZL205A alloy contains 4.6-5.3% Cu element, with a large crystallization range. Due to its pasty solidification characteristics, it has a large tendency to loosen, and the casting is prone to defects such as looseness, which cannot meet the metallurgical requirements of the casting.

[0003] In the traditional pouring system, the runner is directly bonded to the ingode, and then the ingode is directly bonded to the wax pattern. During casting, the molten metal enters the wax pattern directly through the runner from the runner, which can easily cause an overheating zone formed by direct impact, thereby causing the casting to be loose. Summary of the invention

[0004] The main purpose of the present invention is to propose a pouring system for improving the looseness of ZL205A aluminum alloy castings, aiming to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the present invention proposes a pouring system for improving the looseness of ZL205A aluminum alloy castings, including a straight runner, a cross runner and an ingrown runner, wherein the number of the ingrowns is multiple and annularly evenly distributed on the upper end surface of the casting wax mold; the top surfaces of the multiple ingrowns are commonly bonded with an annular runner; multiple cross runners are cross-arranged, and the lower surface of the cross runner is connected to the upper surface of the annular runner; the lower end of the straight runner is connected to the intersection of the multiple cross runners; in the vertical direction, the connection parts of the cross runner and the annular runner are staggered with the connection parts of the ingrown runner and the annular runner.

[0006] Preferably, there are two cross runners, which are cross-arranged.

[0007] Preferably, the annular runner and the transverse runner are integrally formed by press molding.

[0008] Preferably, the ingates are in the shape of a quadrangular pyramid, the large end of the ingates is bonded to the annular runner, and the small end is bonded to the casting wax mold.

[0009] Preferably, the number of the ingates is six.

[0010] Preferably, the straight runner includes a cylinder and an inverted cone integrally formed at the lower end of the cylinder; the lower end of the inverted cone is connected to the intersection of the multiple cross runners.

[0011] Preferably, a disc-shaped body is integrally formed at the top end of the cylinder, and the diameter of the disc-shaped body is greater than the outer diameter of the cylinder.

[0012] Preferably, a buffer socket molding wax block is bonded to the lower surface of the intersection of the plurality of runners.

[0013] Preferably, the length of the cross runner is greater than the outer diameter of the annular runner, and the end of the cross runner forms a cantilever end.

[0014] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0015] (1) In the present invention, an annular runner is added between the runner and the ingrow. When pouring, the molten metal enters from the straight runner, passes through the runner, enters the annular runner, and then enters the wax mold through the ingrow. Since the connecting portion of the runner and the annular runner is staggered with the connecting portion of the ingrow and the annular runner in the vertical direction, it is possible to prevent the molten metal from directly entering the wax mold through the ingrow from the runner, thereby avoiding the overheating zone formed by the direct impact of the molten metal, completely solving the problem of loose castings, and obtaining qualified castings; the qualified rate of castings is improved, thereby reducing the investment cost.

[0016] (2) The pouring system provided by the present invention adopts a counter-gravity pouring method, and the molten metal directly enters the casting from the straight runner through the cross runner, the ring runner, and the inner runner. The process is short, the shrinkage compensation effect is good, the filling is fast, and the solidification mode of the casting is effectively changed from a paste state to a sequential solidification, thereby solving the problem of loose castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A front view of the pouring system provided by the present invention;

[0019] Figure 2 This is a top view of the pouring system provided by the present invention.

[0020] Explanation of the accompanying figures: 1. straight runner; 1a. disc-shaped body; 1b. cylinder; 1c. inverted cone; 2. horizontal runner; 3. inner runner; 4. casting wax mold; 5. ring runner; 6. buffer socket molding wax block. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] Combination Figure 1 , Figure 2 As shown, a pouring system for improving the looseness of ZL205A aluminum alloy castings includes a straight runner 1, a cross runner 2 and an ingode 3, wherein the number of the ingodes 3 is multiple and evenly distributed in a ring shape on the upper end surface of the casting wax mold 4; the top surfaces of the multiple ingodes 3 are commonly bonded with an annular runner 5; multiple cross runners 2 are cross-arranged, and the lower surface of the cross runner 2 is connected to the upper surface of the annular runner 5; the lower end of the straight runner 1 is connected to the intersection of the multiple cross runners 2; in the vertical direction, the connection parts of the cross runner 2 and the annular runner 5 are staggered with the connection parts of the ingode 3 and the annular runner 5.

[0024] Combination Figure 2 As shown, there are two cross runners 2, which are cross-arranged to divide the annular runner 5 into four areas.

[0025] In order to facilitate manufacturing, the annular runner 5 and the horizontal runner 2 are integrally pressed and formed.

[0026] Combination Figure 1 As shown, the ingates 3 are in the shape of a quadrangular pyramid, the large end of the ingates 3 is bonded to the annular runner 5 , and the small end is bonded to the casting wax mold 4 .

[0027] In this embodiment, the number of the ingates 3 is six.

[0028] Combination Figure 1As shown, the sprue 1 includes a cylinder 1b and an inverted cone 1c integrally formed at the lower end of the cylinder 1b; the lower end of the inverted cone 1c is connected to the intersection of the multiple cross runners 2. This connection makes the sprue 1 funnel-shaped, which is convenient for pouring. Furthermore, a disc-shaped body 1a is integrally formed at the top of the cylinder 1b, and the diameter of the disc-shaped body 1a is larger than the outer diameter of the cylinder 1b. The disc-shaped body 1a makes the sprue 1 form a flared shape, which is further convenient for pouring.

[0029] Combination Figure 1 As shown, a buffer pocket molding wax block 6 is bonded to the lower surface of the intersection of the plurality of runners 2. During pouring, a buffer pocket is formed at the buffer pocket molding wax block 6, which has a buffering effect on the molten metal and also has a slag collecting function.

[0030] Combination Figure 2 As shown, the length of the runner 2 is greater than the outer diameter of the annular runner 5, and the end of the runner 2 forms a cantilever end. During pouring, when the molten metal flows horizontally on the runner 2, the cantilever end position can play a buffering role to avoid impact on the annular runner 5.

[0031] 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 pouring system for improving the looseness of ZL205A aluminum alloy castings, comprising a sprue (1), a runner (2) and an ingates (3), characterized in that: The number of the ingates (3) is multiple and the ingates (3) are evenly distributed in a ring shape on the upper end surface of the casting wax mold (4); the top surfaces of the multiple ingates (3) are bonded with a ring runner (5); the multiple cross runners (2) are cross-arranged, and the lower surface of the cross runner (2) is connected to the upper surface of the ring runner (5); the lower end of the straight runner (1) is connected to the intersection of the multiple cross runners (2); in the vertical direction, the connection between the cross runner (2) and the ring runner (5) and the connection between the ingates (3) and the ring runner (5) are staggered.

2. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: The number of the cross runners (2) is two, and the two cross runners (2) are cross-arranged.

3. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: The annular runner (5) and the horizontal runner (2) are integrally pressed and formed.

4. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: The ingrate (3) is in the shape of a quadrangular pyramid, the large end of the ingrate (3) is bonded to the annular ingrate (5), and the small end is bonded to the casting wax mold (4).

5. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: The number of the ingates (3) is six.

6. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: The sprue (1) comprises a cylinder (1b) and an inverted cone (1c) integrally formed at the lower end of the cylinder (1b); the lower end of the inverted cone (1c) is connected to the intersection of the plurality of runners (2).

7. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 6, characterized in that: A disc-shaped body (1a) is integrally formed at the top end of the cylindrical body (1b), and the diameter of the disc-shaped body (1a) is greater than the outer diameter of the cylindrical body (1b).

8. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: A buffer socket molding wax block (6) is bonded to the lower surface of the intersection of the plurality of runners (2).

9. A pouring system for improving the looseness of ZL205A aluminum alloy castings as claimed in claim 1, characterized in that: The length of the cross runner (2) is greater than the outer diameter of the annular runner (5), and the end of the cross runner (2) forms a cantilever end.

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