Ore grinding steel casting gap pouring system

Abstract

The utility model belongs to the technical field of casting pouring systems, and particularly discloses an ore grinding steel casting gap pouring system which comprises a vertical pouring gate, a transverse pouring gate, an inner pouring gate, a casting cavity and a riser, the lower end of the vertical pouring gate is communicated with one end of the transverse pouring gate, the other end of the transverse pouring gate is communicated with the inner pouring gate, the inner pouring gate is communicated with the lower end of the casting cavity, and the riser is communicated with the lower end of the casting cavity. A riser is arranged on the upper end surface of the casting cavity; the inner pouring gate comprises a gap pouring gate, a pouring gate seat and an inner pouring gate; the ingate is communicated with the frustum on the left end face of the sprue base, the left end face of the gap sprue is communicated with the right end face of the sprue base, and the right end face of the gap sprue is communicated with the lower end of the casting cavity; according to the pouring system, the flow gate is designed at the lower end of the casting, and the contact area between the flow gate and the casting is reduced, so that the flow speed of molten steel is effectively reduced, the molten steel can be slowly filled from top to bottom, and the defects of appearance recesses, air holes, sand holes and the like of the casting are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to foundry pouring system technical field, concretely relates to a gap pouring system for mineral grinding cast steel part. BACKGROUND

[0002] In the process of pouring large cast steel parts, bottom-up pouring system is often used for pouring. However, some castings cannot use bottom-up pouring system due to structural features, and can only be filled from the lower end of the casting. For relatively high castings, the molten steel will splash and turbulent due to large drop during pouring process, which cannot guarantee the smooth rise of the molten steel, resulting in the formation of concave on the appearance of the castings, and the castings have more serious defects such as blowhole and sand eye. SUMMARY

[0003] In view of the problems in the background art, the utility model provides a gap pouring system for mineral grinding cast steel part. The pouring system is designed with an inner gate at the lower end of the casting, and the contact area between the inner gate and the casting is reduced, which can effectively reduce the flow rate of the molten steel.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a gap pouring system for mineral grinding cast steel part, comprising a vertical sprue, a horizontal sprue, an inner gate, a casting cavity and a riser, the lower end of the vertical sprue is connected with one end of the horizontal sprue, the other end of the horizontal sprue is connected with the inner gate, the inner gate is connected with the lower end of the casting cavity, and the upper end surface of the casting cavity is provided with the riser.

[0005] The inner gate comprises a gap gate, a gate seat and an inner runner. The inner runner is a circular tube. The left end of the gate seat is a conical frustum, and the right end of the gate seat is a rectangular cavity. The gap gate is a rectangular cavity. The inner runner is connected with the conical frustum of the left end surface of the gate seat. The left end surface of the gap gate is connected with the right end surface of the gate seat. The right end surface of the gap gate is connected with the lower end of the casting cavity.

[0006] The width of the gap gate is a, and the diameter of the inner runner is b. The ratio of a to b is 1:3.

[0007] The height of the gap gate is equal to the height of the gate seat.

[0008] The length of the gap gate is h1, the length of the gate seat is h2, the length of the inner runner is h3, and the height of the gap gate is h4. The ratio of h1 to h2 to h3 to h4 is 1:4:4:10.

[0009] The width to length ratio of the gap gate is 1:1-2, that is, a:h1=1:1-2.

[0010] The cross runner comprises a straight runner and an arc runner; one end of the straight runner is communicated with the lower end of the vertical runner, and the other end of the straight runner is communicated with the middle part of the arc runner; the arc runner is arranged outside the lower end of the casting cavity, the diameter of the arc runner is larger than the outer diameter of the lower end of the casting cavity, and the inner side of the arc runner is provided with a plurality of inner gates.

[0011] The utility model discloses a kind of gap pouring systems of mine grinding cast steel parts, and the pouring system designs inner gate at the lower end of casting, and reduces the contact area between inner gate and casting, to effectively reduce the flow rate of molten steel, so that molten steel can slowly fill the mold from top to bottom, to reduce the defects such as appearance depression, blowhole and pinhole of casting. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is front view of the utility model.

[0013] Figure 2 It is left view of the utility model.

[0014] Figure 3 It is A-A sectional view.

[0015] Figure 4 It is front view of inner gate.

[0016] Figure 5 It is B-B sectional view.

[0017] Figure 6 It is left view of inner gate.

[0018] In the drawing: 1, vertical runner, 2, cross runner, 3, inner gate, 4, casting cavity, 6, riser, 21, straight runner, 22, arc runner, 31, gap gate, 32, gate seat, 33, inner gate. DETAILED DESCRIPTION

[0019] The technical solutions of the utility model will be described clearly and completely in conjunction with the drawings of the specification, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative labor belong to the protection scope of the utility model.

[0020] The following will be combined with the drawings of the specification Figures 1-6The utility model discloses further elaborate specific embodiment of the utility model: a kind of mine grinding cast steel gap pouring system, including vertical gate 1, horizontal gate 2, ingate 3, casting cavity 4 and riser 6, the upper end of vertical gate 1 is equipped with gate seat, the lower end of vertical gate 1 is connected with the one end of horizontal gate 2, the other end of horizontal gate 2 is connected with ingate 3, the horizontal gate 2 include straight gate 21 and arc gate 22;The straight gate 21 one end is connected with the lower end of vertical gate 1, and the other end of straight gate 21 is connected with the middle part of arc gate 22;The arc gate 22 is arranged at the lower end outside of casting cavity 4, and the diameter of arc gate 22 is greater than the outer diameter of the lower end of casting cavity 4, and the inside of arc gate 22 is equipped with multiple ingates 3;When using gap pouring, because the contact area of gap gate 31 of ingate 3 and casting cavity 4 is smaller, the flow of molten steel is smaller when pouring, in order to increase pouring speed, multiple ingates 3 are arranged on the inside of arc gate 22, the purpose is to improve the pouring speed of molten steel, in this embodiment, taking two ingates 3 as an example;The ingate 3 is connected with the lower end of casting cavity 4, and riser 6 is arranged on the upper end surface of casting cavity 4;The ingate 3 includes gap gate 31, gate seat 32 and inner runner 33;The inner runner 33 is a circular tube, the left end of gate seat 32 is a conical frustum, the right end of gate seat 32 is a rectangular cavity, and the gap gate 31 is a rectangular cavity;The inner runner 33 is connected with the conical frustum of the left end surface of gate seat 32, the left end surface of gap gate 31 is connected with the right end surface of gate seat 32, and the right end surface of gap gate 31 is connected with the lower end of casting cavity 4;The width of gap gate 31 is a, the diameter of inner runner 33 is b, and a:b=1:3;The height of gap gate 31 is equal to the height of gate seat 32;The length of gap gate 31 is h1, the length of gate seat 32 is h2, the length of inner runner 33 is h3, the height of gap gate 31 is h4, and h1:h2:h3:h4=1:4:4:10;The width-length ratio of gap gate 31 is 1:1-2, that is, a:h1=1:1-2;In actual use, the width-length ratio of gap gate 31 is generally 1:1.5.

[0021] The utility model uses the following process: first, using sand mold casting mold method to make the present pouring system;After mold making is completed, pouring can be started;When pouring, molten steel enters from the gate seat of the upper end of vertical gate 1, enters horizontal gate 2 after passing through vertical gate 1, then enters ingate 3 from horizontal gate 2, and molten steel enters the lower end of casting cavity 4 through gap gate 31 of ingate 3, and fills from bottom to top, finally flows into riser 6 on the upper end of casting cavity 4, and pouring is completed.

[0022] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0023] The part not described in detail of the present application is prior art.

Claims

1. A gap gating system for steel castings for mining mills, comprising a vertical sprue (1), a horizontal sprue (2), an ingate (3), a casting cavity (4), and a riser (6), characterized in that: The lower end of the vertical gating (1) is connected to one end of the horizontal gating (2), the other end of the horizontal gating (2) is connected to the ingate (3), the ingate (3) is connected to the lower end of the casting cavity (4), and a riser (6) is provided on the upper surface of the casting cavity (4). The inner gate (3) includes a slit gate (31), a gate seat (32), and an inner runner (33); the inner runner (33) is a round tube, the left end of the gate seat (32) is a frustum, the right end of the gate seat (32) is a rectangular cavity, and the slit gate (31) is a rectangular cavity; the inner runner (33) is connected to the frustum on the left end face of the gate seat (32), the left end face of the slit gate (31) is connected to the right end face of the gate seat (32), and the right end face of the slit gate (31) is connected to the lower end of the casting cavity (4).

2. The gap gating system for cast steel parts for mining mills according to claim 1, characterized in that: The width of the sprue (31) is a, and the diameter of the ingate (33) is b, where a:b = 1:

3.

3. The gap gating system for cast steel parts for mining mills according to claim 1, characterized in that: The height of the slit gate (31) is equal to the height of the gate seat (32).

4. The gap gating system for cast steel parts for mining mills according to claim 3, characterized in that: The length of the sprue (31) is h1, the length of the sprue seat (32) is h2, the length of the ingate (33) is h3, and the height of the sprue (31) is h4, h1:h2:h3:h4=1:4:4:

10.

5. A gap gating system for cast steel parts for mining mills according to claim 2 or 4, characterized in that: The width to length ratio of the slit gate (31) is 1:1 to 2, that is, a:h1=1:1 to 2.

6. The gap gating system for cast steel parts for mining mills according to claim 1, characterized in that: The horizontal runner (2) includes a straight runner (21) and an arc runner (22); one end of the straight runner (21) is connected to the lower end of the vertical runner (1), and the other end of the straight runner (21) is connected to the middle of the arc runner (22); the arc runner (22) is located on the outer side of the lower end of the casting cavity (4), the diameter of the arc runner (22) is larger than the outer diameter of the lower end of the casting cavity (4), and multiple ingates (3) are provided on the inner side of the arc runner (22).

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