Fixing device for sand-coated iron mold pouring cup

Abstract

The utility model discloses a fixing device of a sand-lined iron mold sprue cup, which comprises a sprue cup (3) and a sprue (2), and further comprises a gasket (1), the gasket (1) is arranged between the sprue cup (3) and the sprue (2), the top end of the sprue (2) is provided with a top end boss (21), and the bottom end of the sprue cup (3) is provided with a bottom end boss (31); the top end boss (21) and the bottom end boss (31) are respectively embedded with the gasket (1); the gasket (1) is placed on the top end boss (21) to be embedded, the gasket (1) is taken out after sand coating, the inner structure of a cavity of the sprue (2) is in a step shape, and the cavity can be embedded with the bottom end boss (31). The step-shaped cavity is formed through the gasket and is tightly combined with the boss at the bottom end of the pouring cup, so that the pouring cup is well stabilized, and meanwhile, the sprue is fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of iron mold sand-coated casting, in particular to a fixing device for an iron mold sand-coated pouring cup. Background Art

[0002] Iron mold sand coating process is a special semi-precision casting technology developed by Chinese foundry workers combining metal mold casting, sand casting and shell casting. The iron mold sand coating process uses a metal outer mold and a metal mold cavity similar to the main key shape as a sand box iron mold. During the molding process, a layer of 3mm-10mm coated sand is covered on the iron mold to form a casting mold for pouring castings - this is iron mold sand coating.

[0003] The production process of iron mold sand coating is: main machine molding - check and assemble the box - lock the box and place the pouring cup - pouring - open the box and take out the casting - clean the sand - molding.

[0004] In the existing iron mold sand coating process, the lock box and pouring cup placement link requires the pouring cup to be aligned with the top of the sprue. Misalignment can easily cause the molten metal to wash the sand mold, resulting in sand holes in the casting; too much viscose is drawn into the cavity to form slag inclusions. And after pouring, the pouring cup is manually shoveled away when the molten iron in the pouring cup is semi-solidified, which wastes a man-hour. Some manufacturers coat the pouring cup with a layer of film to prevent the pouring cup from floating. The shoveled pouring cup and iron mold must be collected and transported separately. This operation increases costs and increases the difficulty of operation. It also leads to an increase in the scrap rate of casting products, greatly affecting production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a fixing device for an iron mold sand-covered pouring cup in view of the above-mentioned problems currently existing, so as to solve the problems of the pouring cup being misaligned, unstable and easy to deviate, and the operation is simple and convenient, labor is saved and costs are reduced.

[0006] The technical solution of the utility model is as follows:

[0007] A fixing device for an iron mold sand-coated pouring cup comprises a pouring cup and a sprue, and also comprises a gasket, wherein the gasket is arranged between the pouring cup and the sprue, a top boss is arranged at the top of the sprue, and a bottom boss is arranged at the bottom of the pouring cup; the top boss and the bottom boss are respectively engaged with the gasket; the gasket is placed on the top boss for engagement, and the gasket is taken out after sand coating, the internal structure of the sprue cavity is stepped, and the cavity can be engaged with the bottom boss.

[0008] Furthermore, the gasket is a ring-shaped structure.

[0009] Furthermore, the inner diameter of the gasket is the same as the diameter of the top boss, and the outer diameter of the gasket is greater than or equal to the diameter of the top boss.

[0010] Furthermore, the inner diameter of the gasket is the same as the inner diameter of the bottom boss, and the outer diameter of the gasket is the same as the outer diameter of the bottom boss.

[0011] Furthermore, the gasket side cross-section is circular, and the gasket is a circular ring structure.

[0012] Furthermore, the height of the gasket is the same as the protruding height of the top boss.

[0013] Furthermore, the height of the gasket is the same as the protruding height of the bottom boss.

[0014] Furthermore, the gasket is arranged on the top boss and is flush with the surface of the iron mold.

[0015] Furthermore, the top boss and the bottom boss are stepped bosses; the straight runner is connected to the cross runner to form a pouring system.

[0016] Compared with the existing technology, the beneficial effects of the utility model are:

[0017] 1. A fixing device for an iron mold sand-covered pouring cup, which forms a stepped cavity through a gasket and is tightly combined with the boss at the bottom of the pouring cup, which plays a good role in stabilizing the pouring cup and also plays a role in fixing the sprue;

[0018] 2. A fixing device for an iron mold sand-covered pouring cup, which has a reasonable method, simple operation, small gasket volume, light weight, and can be quickly installed and removed, saving time for later stabilization of the pouring cup;

[0019] 3. A fixing device for an iron mold sand-covered pouring cup. The stepped step at the bottom of the pouring cup cooperates with the sprue to reduce the amount of sand around the pouring cup, greatly reducing the cost;

[0020] 4. A fixing device for an iron mold sand-covered pouring cup, the gasket used is cheap, has a long service life and low cost;

[0021] 5. A fixing device for the sand-covered pouring cup of an iron mold. During the unpacking and taking-out process, the pouring system remains in the lower mold with the casting, and the pouring cup remains in the upper mold. There is no need to remove the pouring cup, which saves labor and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic diagram of the structure of a gasket of a fixing device of an iron mold sand-covered pouring cup.

[0023] Figure 2 The figure is a schematic diagram of the structure of the straight runner and the cross runner of a fixing device for an iron mold sand-covered pouring cup.

[0024] Figure 3 The figure is a cross-sectional view of a pouring cup of a fixing device for an iron mold sand-covered pouring cup.

[0025] Figure 4 The figure is a schematic diagram of the assembly of a fixing device gasket and a sprue of an iron mold sand-covered pouring cup.

[0026] Figure 5 The figure is a schematic diagram of the assembly of a sprue and a pouring cup of a fixing device for an iron mold sand-covered pouring cup.

[0027] Figure numerals: 1-gasket, 11-gasket side, 2-sprue, 21-top boss, 3-pouring cup, 31-bottom boss, 4-cross runner. DETAILED DESCRIPTION

[0028] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] See also Figure 1-2 A fixing device for an iron mold sand-coated pouring cup comprises a pouring cup 3 and a sprue 2, and also comprises a gasket 1, wherein the gasket 1 is arranged between the pouring cup 3 and the sprue 2, a top end boss 21 is arranged at the top end of the sprue 2, and a bottom end boss 31 is arranged at the bottom end of the pouring cup 3; the top end boss 21 and the bottom end boss 31 are respectively engaged with the gasket 1; the gasket 1 is placed on the top end boss 21 for engagement, and the gasket 1 is taken out after sand coating, and the internal structure of the sprue 2 cavity is stepped, and the cavity can be engaged with the bottom end boss 31.

[0031] The gasket 1 is an annular structure.

[0032] The inner diameter of the gasket 1 is the same as the diameter of the top boss 21 , and the outer diameter of the gasket 1 is greater than or equal to the diameter of the top boss 21 .

[0033] The inner diameter of the gasket 1 is the same as the inner diameter of the bottom boss 31 , and the outer diameter of the gasket 1 is the same as the outer diameter of the bottom boss 31 .

[0034] The gasket side surface 11 of the gasket 1 has a circular cross section, and the gasket 1 is a circular ring structure.

[0035] The height of the gasket 1 is the same as the protruding height of the top boss 21 .

[0036] The height of the gasket 1 is the same as the protruding height of the bottom end boss 31 .

[0037] The gasket 1 is arranged on the top boss 21 and is flush with the surface of the iron mold.

[0038] The top boss 21 and the bottom boss 31 are stepped bosses; the sprue 2 is connected to the runner 4 to form a pouring system.

[0039] The utility model also includes a method for fixing an iron mold sand-covered pouring cup fixing device, comprising the following steps:

[0040] When the iron mold is covered with sand, the upper mold of the sprue 2 is matched with the iron mold, and the gasket 1 is placed on the top boss 21 of the sprue 2. Then the sand shooting machine moves down and is closely combined with the iron mold surface. The resin sand is filled into the gap between the mold and the iron mold through the sand shooting hole to form a casting cavity. After the sand is filled, the gasket 1 is taken out, and the cavity becomes a step-shaped cavity.

[0041] The pouring cup 3 with the bottom boss 31 is placed in the stepped cavity, and the molten metal is poured. After the molten metal is cooled, the casting is taken out of the box, and the whole iron mold sand-coated casting process is completed.

[0042] Figure 1 The utility model relates to a gasket used in a fixing device of an iron mold sand-covered pouring cup. The gasket is in the shape of a circular ring and is made of cast iron through a casting process. Figure 2 It is the pouring system in the casting process. When designing the casting mold, the pouring system composed of the sprue and the cross runner is made into an integrated type with the casting upper mold. The sprue is a frustum structure that is thin at the top and thick at the bottom. It is connected to the cross runner as an integral type. A boss is set on the top. The sprue material is mold steel. Figure 3 The pouring cup is used in the pouring process, and a boss is arranged at the bottom. The raw material of the pouring cup is quartz sand, and it is prepared by the iron mold coating sand process.

[0043] Specific working principle: (1) When the iron mold is covered with sand, the upper mold of the straight runner casting is matched with the upper iron mold, and a 3-10mm gap is left between the mold and the iron mold for sand filling. The upper plane of the straight runner is in the same plane as the upper plane of the iron mold. The circular gasket is placed on the top boss of the straight runner. Due to the height and size of the gasket, it can be quickly inserted. Then the sand shooting machine moves down and closely combines with the iron mold surface. Resin sand is filled into the gap between the mold and the iron mold through the sand shooting hole to form a casting cavity. After the sand filling is completed, the circular gasket is taken out, and a stepped step is formed on the circular gasket to facilitate the insertion of the pouring cup.

[0044] (2) Through the boss design at the bottom of the gate, it can be easily placed in the stepped cavity formed by the circular gasket, and the bottom of the gate cup can be well aligned with the straight runner. At the same time, the size and depth of the boss also determine the size of the stabilizing effect of the gate cup. After the gate cup is stabilized, the molten metal is poured in. After the molten metal cools down, the casting is taken out of the box, completing the entire iron mold sand-coated casting process.

[0045] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A fixing device for a sand-coated iron mold pouring cup, comprising a pouring cup (3) and a sprue (2), characterized in that: The invention also comprises a gasket (1), wherein the gasket (1) is arranged between the pouring cup (3) and the sprue (2); a top end boss (21) is arranged at the top end of the sprue (2), and a bottom end boss (31) is arranged at the bottom end of the pouring cup (3); the top end boss (21) and the bottom end boss (31) are respectively engaged with the gasket (1); the gasket (1) is placed on the top end boss (21) for engagement, and the gasket (1) is taken out after sand coating, and the internal structure of the sprue (2) cavity is stepped, and the cavity can be engaged with the bottom end boss (31).

2. A fixing device for an iron mold sand-covered pouring cup according to claim 1, characterized in that: The gasket (1) is an annular structure.

3. A fixing device for an iron mold sand-covered pouring cup according to claim 2, characterized in that: The inner diameter of the gasket (1) is the same as the diameter of the top boss (21), and the outer diameter of the gasket (1) is greater than or equal to the diameter of the top boss (21).

4. A fixing device for an iron mold sand-covered pouring cup according to claim 3, characterized in that: The inner diameter of the gasket (1) is the same as the inner diameter of the bottom end boss (31), and the outer diameter of the gasket (1) is the same as the outer diameter of the bottom end boss (31).

5. A fixing device for an iron mold sand-covered pouring cup according to any one of claims 1 to 4, characterized in that: The gasket side surface (11) of the gasket (1) has a circular cross-section, and the gasket (1) is a circular ring structure.

6. A fixing device for an iron mold sand-covered pouring cup according to claim 5, characterized in that: The height of the gasket (1) is the same as the protruding height of the top boss (21).

7. The fixing device for the iron mold sand-covered pouring cup according to claim 5, characterized in that: The height of the gasket (1) is the same as the protruding height of the bottom end boss (31).

8. The fixing device for the iron mold sand-covered pouring cup according to claim 1, characterized in that: The gasket (1) is arranged on the top boss (21) and is flush with the surface of the iron mold.

9. The fixing device for the iron mold sand-covered pouring cup according to claim 1, characterized in that: The top end boss (21) and the bottom end boss (31) are stepped bosses; the straight runner (2) is connected to the horizontal runner (4) to form a pouring system.

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