Gate stick for flange plate

Abstract

The utility model relates to the technical field of wax mould casting, in particular to a gate stick for a flange plate, which is a wax mould gate stick with a flange plate wax mould adhered to each of the left and right symmetrical front and rear surfaces, and comprises a vertical main pouring gate and auxiliary pouring gates branched from the bottom end of the main pouring gate to two sides, the main pouring gate and the two auxiliary pouring gates form a herringbone shape, the top of the main pouring gate is provided with an arc-shaped upper buffer pouring gate, the arc top of the upper buffer pouring gate is provided with a pouring cup, and the main pouring gate and the pouring cup are coaxial; a lower buffer pouring gate forming a 7 shape with the slave pouring gate is arranged at the bottom end of the slave pouring gate; and a flange plate wax mold is adhered to the front and rear surfaces of the upper buffer pouring gate and the lower buffer pouring gate. According to the utility model, the herringbone pouring gate is adopted for vertical casting, two flange plates can be cast each time, gas in the mold cavity can automatically escape from the pouring gate during casting, the operation is simple, the molding is good, and the defects of air holes, shrinkage porosity, cracks and the like are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wax mold casting, in particular to a pouring rod used for a flange. Background Art

[0002] When flanges and other disc parts are produced by casting technology, because of their thin walls and large size, in order to prevent shrinkage holes and cold cracks, multiple inner runners are often set up to connect to various parts of the flange to fill the flange with liquid at the same time. At the same time, in order to make the cooling speed of various parts of the flange consistent and prevent the flange from generating excessive cooling stress and deformation due to the stress, the flange is often cast horizontally. The horizontal flange casting method usually can only cast one piece at a time and requires a larger workshop operation position; in addition, the horizontal casting of the flange is difficult to determine the highest point in the mold cavity, and it is also difficult to determine the position of the exhaust hole, so the flange casting is prone to material shortage defects or pores in certain positions. For example, patent 2012101870633, a low-pressure casting wheel hub exhaust system and its casting method, in order to solve the exhaust problem, a large number of exhaust plugs are evenly arranged at the center and edge of the wheel hub, which is costly. Utility Model Content

[0003] The utility model aims to provide a gate rod for flanges to address the deficiencies of the prior art. The gate rod adopts vertical casting, can cast two flanges at one time, and the gas in the mold cavity automatically escapes completely from the gate during casting.

[0004] The utility model adopts the following technical scheme to solve the technical problems: a gate rod for a flange, which is a wax mold gate rod with left-right symmetry and can bond a flange wax mold to its front and rear sides respectively, comprising a vertical main runner and a secondary runner branched from the bottom end of the main runner to both sides, the main runner and the two secondary runners forming a herringbone shape, an arc-shaped upper buffer runner is arranged on the top of the main runner, a gate cup is arranged on the arc top of the upper buffer runner, the main runner and the gate cup are coaxial; a lower buffer runner forming a 7-shape therewith is arranged at the bottom end of the secondary runner, and the flange wax mold is bonded to the front and rear sides of the upper buffer runner and the lower buffer runner.

[0005] Preferably, the angle between the two slave runners is 100° to 110°.

[0006] Preferably, the connection portion between the main runner and the two secondary runners is spherical, and the connecting ball can reduce the impact of the molten metal on the secondary runners when it falls.

[0007] Preferably, the lower buffer runner is also arc-shaped and is cocircular with the upper buffer runner, and the central angle corresponding to the lower buffer runner is smaller than that of the upper buffer runner.

[0008] Preferably, the central angle corresponding to the upper buffer runner is 65° to 75°.

[0009] Preferably, the diameter of the secondary runner is smaller than that of the main runner, and the cross-sectional area of ​​the upper buffer runner and the lower buffer runner is at least twice that of the main runner.

[0010] Preferably, the section where the bottom of the runner connects with the lower buffer runner is thickened, the cross-sectional area of ​​the thickened section is at least twice that of the runner, and the length is 1 / 3 to 1 / 2 of the length of the runner.

[0011] Preferably, both sides of the connection between the pouring cup and the upper buffer runner are chamfered.

[0012] Preferably, a reinforcing connecting rod is provided between the bottoms of the two lower buffer runners.

[0013] The beneficial effects of the utility model are: a gate rod for a flange, which is a wax mold gate rod with left-right symmetry and can bond a flange wax mold to each of its front and rear surfaces, including a vertical main runner and a secondary runner branching from the bottom end of the main runner to both sides, the main runner and the two secondary runners forming a herringbone shape, the top of the main runner is provided with an arc-shaped upper buffer runner, the arc top of the upper buffer runner is provided with a gate cup, the main runner and the gate cup are coaxial; the bottom end of the secondary runner is provided with a lower buffer runner forming a 7-shaped shape, and the flange wax mold is bonded to the front and rear surfaces of the upper buffer runner and the lower buffer runner. The utility model adopts a herringbone runner for vertical casting, and two flanges can be cast each time. During casting, the gas in the mold cavity can automatically escape from the gate, the operation is simple, the molding is good, and there are no defects such as pores, shrinkage, and cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a stereoscopic diagram of a gate rod used for a flange.

[0015] Description of reference numerals:

[0016] 1——main runner, 2——secondary runner, 3——upper buffer runner, 4——gate cup, 5——lower buffer runner, 6——strengthening connecting rod. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0018] like Figure 1As shown, a gate rod for a flange plate in this embodiment is a wax mold gate rod which is symmetrical on both sides and can bond a flange plate wax mold to each of the front and rear sides. It includes a vertical main runner 1 and a secondary runner 2 branched from the bottom end of the main runner 1 to both sides, the main runner 1 and the two secondary runners 2 form a herringbone shape, the top of the main runner 1 is provided with an arc-shaped upper buffer runner 3, the arc top of the upper buffer runner 3 is provided with a gate cup 4, the main runner 1 and the gate cup 4 are coaxial; the bottom end of the secondary runner 2 is provided with a lower buffer runner 5 forming a 7-shape therewith, and the flange plate wax mold is bonded to the front and rear surfaces of the upper buffer runner 3 and the lower buffer runner 5.

[0019] This embodiment can be used for wax casting of various plate parts, especially flanges. The two sides of the gate rod are bonded to the flange wax mold, and two flanges can be cast at one time. This embodiment adopts vertical pouring, which allows the gas in the mold cavity to easily escape from the gate, without the need to set other air ports; during operation, the mold is kept vertical, so that the pouring cup 4 is facing upward, and the poured molten metal flows into the mold cavity from the upper buffer runner 3 and the lower buffer runner 5, and the direction in which the molten metal flows into the mold cavity is horizontal, which is at right angles to the vertical pouring direction, which can greatly alleviate the impact of the molten metal on the mold cavity. After entering the mold cavity, the molten metal first falls to the bottom, then overflows, and finally fills the mold cavity. During the overflow of the molten metal, the air in the mold cavity is discharged from the upper buffer runner 3.

[0020] In vertical casting, the pressure of the molten metal at the bottom of the mold cavity is the highest, and because it is poured first, it solidifies first, so the cooling order of the flange during casting is from bottom to top, which can prevent shrinkage or shrinkage holes in the casting, and the casting has a dense structure and good molding.

[0021] The cross-sectional area of ​​the two buffer runners is at least twice that of the main runner 1 , thereby reducing the flow rate of the molten metal and further reducing the impact of the molten metal on the mold cavity.

[0022] The section at the bottom of the runner 2 connecting with the lower buffer runner 5 is thickened, and its cross-sectional area is at least twice that of the runner 2, and its length is 1 / 3 to 1 / 2 of the length of the runner 2; the thickened section cooperates with the lower buffer runner 5 to accommodate more molten metal, and the cooling speed is slower than that of the molten metal at the bottom of the mold cavity, so that the molten metal can be replenished to the casting at the bottom of the mold cavity to prevent shrinkage or material shortage defects.

[0023] Because the cross-sections of the bottom end of the runner and the lower buffer runner are both relatively large, the weight of the lower end of the wax mold is large. In order to enhance the strength of the wax mold at the bottom, a reinforcing connecting rod 6 is provided between the bottoms of the two lower buffer runners 5.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, and for the convenience of describing the technical solution, the front, rear, left, right, top, middle, and bottom directions adopted are based on the settings in the accompanying drawings, rather than limiting the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A gate rod for a flange, characterized in that: It is a wax mold gate rod that is symmetrical on both sides and can be glued with a flange wax mold on the front and back sides respectively. It includes a vertical main runner and a slave runner that branches off from the bottom end of the main runner to both sides. The main runner and the two slave runners form a herringbone shape. The top of the main runner is provided with an arc-shaped upper buffer runner, and the arc top of the upper buffer runner is provided with a gate cup. The main runner and the gate cup are coaxial; the bottom end of the slave runner is provided with a lower buffer runner that forms a 7 shape with it, and the flange wax mold is glued to the front and back sides of the upper buffer runner and the lower buffer runner.

2. A gate rod for a flange according to claim 1, characterized in that: The included angle between the two secondary runners is 100° to 110°.

3. A gate rod for a flange according to claim 1, characterized in that: The connection part between the main runner and the two secondary runners is spherical.

4. A gate rod for a flange according to claim 1, characterized in that: The lower buffer runner is also arc-shaped and is cocircular with the upper buffer runner, and the central angle corresponding to the lower buffer runner is smaller than that of the upper buffer runner.

5. The gate rod for flange according to claim 1, characterized in that: The central angle corresponding to the upper buffer runner is 65° to 75°.

6. A gate rod for a flange according to claim 1, characterized in that: The diameter of the secondary runner is smaller than that of the main runner, and the cross-sectional areas of the upper buffer runner and the lower buffer runner are at least twice that of the main runner.

7. A gate rod for a flange according to claim 1, characterized in that: The section where the bottom of the runner connects with the lower buffer runner is thickened, the cross-sectional area of ​​the thickened section is at least twice that of the runner, and the length is 1 / 3 to 1 / 2 of the length of the runner.

8. The gate rod for flange according to claim 1, characterized in that: The connection between the pouring cup and the upper buffer pouring channel is chamfered on both sides.

9. A gate rod for a flange according to claim 1, characterized in that: A reinforcing connecting rod is arranged between the bottoms of the two lower buffer runners.

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