Pouring device for brake drum

Abstract

The utility model discloses a pouring device for a brake drum, which comprises a brake drum forming die, a filter screen and a main pouring gate forming die, two sides of the lower end of the main pouring gate forming die are respectively connected with two first pouring gate forming dies which are symmetrically arranged, and the lower ends of the first pouring gate forming dies are lapped with second pouring gate forming dies. A filter screen is arranged between the first pouring gate forming die and the second pouring gate forming die, two third pouring gate forming dies are symmetrically arranged at the lower end of the end of the second pouring gate forming die, and the ends of the third pouring gate forming dies are connected with fourth pouring gate forming dies. According to the utility model, the functions of uniformizing the temperature of molten iron in the cavity, improving the casting quality, accidentally accelerating the flowing of the molten iron and reducing the loss of heat in the pouring gate are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of brake drum casting, in particular to a casting device for brake drums. Background Art

[0002] The casting mold of the brake drum generally includes a brake drum model and a runner model, which are combined to form a complete mold model. When the brake drum is cast with a traditional sand mold, there is a serious sand flushing of the molten iron and uneven temperature distribution of the molten iron in the cavity, resulting in uneven physical properties of different parts of the brake drum after cooling. In order to overcome the above problems, the patent technology with application number 201510157288.8 in the prior art discloses a static pressure line double brake drum rotary casting device, which adopts a method of setting an oblique teaching with an angle with the circumferential tangent on one side of the brake drum forming mold to inject molten iron into the cavity, so as to avoid the sand flushing phenomenon, and at the same time, the molten iron can be rotated and mixed in the cavity to improve the uniformity of the molten iron in various parts. However, the technical solution is used for the runners connected to the brake drum forming mold. The number of runners is small and they are all set on the same side. Due to the volume of the brake drum itself, the molten iron enters from a single side. The kinetic energy added by the casting angle is not enough to make the molten iron fully stirred and mixed in the cavity and balance the temperature.

[0003] Therefore, designing a casting device that can even out the temperature of molten iron in the cavity and improve the casting quality is exactly the problem that the inventor wants to solve. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pouring device for a brake drum, which can achieve a uniform temperature of molten iron in the cavity and improve the casting quality.

[0005] The technical solution adopted by the device of the utility model is: a casting device for a brake drum, comprising a brake drum molding die, a filter screen, and a main runner molding die, wherein two first runner molding dies are symmetrically connected to both sides of the lower end of the main runner molding die, a second runner molding die is overlapped at the lower end of the first runner molding die, a filter screen is arranged between the first runner molding die and the second runner molding die, two third runner molding dies symmetrically arranged are arranged at the lower end of the end of the second runner molding die, a fourth runner molding die is connected to the end of the third runner molding die, and the fourth runner molding die is respectively connected to two fifth runner molding dies through connecting runner molding dies.

[0006] Furthermore, the fifth runner forming mold includes a fifth runner forming mold A, a fifth runner forming mold B, a fifth runner forming mold C, and a fifth runner forming mold D and have the same structure. The fifth runner forming mold A and the fifth runner forming mold B are located on the same side of the brake drum forming mold and are connected to the same fourth runner forming mold. The fifth runner forming mold C and the fifth runner forming mold D are located on the same side of the brake drum forming mold and are connected to the same fourth runner forming mold.

[0007] Furthermore, the fifth runner forming mold A, the fifth runner forming mold B, the fifth runner forming mold C, the fifth runner forming mold D and the circumferential surface tangent angle of the brake drum forming mold are the same and the angle is less than 30°.

[0008] Furthermore, the fifth runner forming mold A includes two parallel branch runner forming molds.

[0009] Furthermore, the upper end surface of the first runner forming mold is provided with a first inclined guide surface inclined downward, and the lower end surface of the second runner forming mold is provided with a second inclined guide surface inclined downward, and the first inclined guide surface is arranged in parallel with the second inclined guide surface.

[0010] Furthermore, the thickness of the third runner forming die is twice the thickness of the fourth runner forming die.

[0011] Furthermore, the width of the connecting runner forming die is smaller than that of the fourth runner forming die and the fifth runner forming die.

[0012] Furthermore, the area of ​​the filter screen is larger than the area of ​​the upper end surface of the second runner forming die.

[0013] The beneficial effects of the utility model device are:

[0014] 1. The utility model arranges evenly distributed fifth runner forming molds around the brake drum forming mold and arranges a small angle tangent to the circumference of the brake drum forming mold. When molten iron is poured from all around the brake drum, its temperature is more uniform when it rotates and mixes in the cavity, reducing slag flushing, achieving a uniform molten iron temperature in the cavity, and improving the casting quality.

[0015] 2. The utility model adopts a first runner forming mold and a second runner forming mold to form a runner forming mold that is inclined downward in the vertical direction. Unexpectedly, the flow rate of molten iron in the runner can be accelerated, thereby realizing the function of accelerating the flow of molten iron and reducing heat loss in the runner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural view of the utility model.

[0017] Figure 2 yes Figure 1 Sectional view at AA.

[0018] Figure 3 yes Figure 1 Cross-sectional view at BB in the middle.

[0019] Explanation of the accompanying drawings: 1-brake drum molding die; 2-fifth runner molding die A; 3-connecting runner molding die; 4-fourth runner molding die; 5-third runner molding die; 6-fifth runner molding die B; 7-fifth runner molding die D; 8-fifth runner molding die C; 9-filter screen; 10-first runner molding die; 11-second runner molding die; 12-main runner molding die. DETAILED DESCRIPTION

[0020] The following is a further description of the present invention in conjunction with specific embodiments. These embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to the application.

[0021] See also Figures 1 to 3 This is the structural view of the utility model. Figure 1 Sectional view at AA, Figure 1 A cross-sectional view at BB in the middle shows a casting device for a brake drum, comprising a brake drum forming mold 1, a filter screen 9, and a main runner forming mold 12. Two first runner forming molds 10 symmetrically arranged are connected to the lower ends of the main runner forming mold 12. A second runner forming mold 11 is overlapped at the lower end of the first runner forming mold 10. A filter screen 9 is arranged between the first runner forming mold 10 and the second runner forming mold 11. The upper end surface of the first runner forming mold 10 is provided with a first inclined guide surface inclined downward. The second runner The lower end face of the forming die 11 is provided with a second inclined guide face inclined downward, and the first inclined guide face is arranged in parallel with the second inclined guide face. The above structure can cooperate with the second runner forming die 11 at one end of the first runner forming die 10 to form a downward inclined runner, which is helpful for the flow of molten iron in the runner, reduces the kinetic energy consumption of the molten iron and increases the flow rate. The area of ​​the filter screen 9 is larger than the area of ​​the upper end face of the second runner forming die 11. The filter screen 9 is used for filtering slag and fully covers the upper end of the second runner forming die 11 and the lower end of the first runner forming die 10.

[0022] The lower end of the end of the second runner forming mold 11 is provided with two symmetrically arranged third runner forming molds 5, the end of the third runner forming mold 5 is connected to the fourth runner forming mold 4, the thickness of the third runner forming mold 5 is twice the thickness of the fourth runner forming mold 4, the lower end of the third runner forming mold 5 is lower than the lower end of the fourth runner forming mold 4, so that a barrier structure is formed when the molten iron passes through, which helps to buffer, and the fourth runner forming mold 4 is connected to two fifth runner forming molds through the connecting runner forming mold 3.

[0023] The fifth runner forming mold includes a fifth runner forming mold A2, a fifth runner forming mold B6, a fifth runner forming mold C8, and a fifth runner forming mold D7 and has the same structure. The fifth runner forming mold A2 and the fifth runner forming mold B6 are located on the same side of the brake drum forming mold 1 and are connected to the same fourth runner forming mold 4. The fifth runner forming mold C8 and the fifth runner forming mold D7 are located on the same side of the brake drum forming mold 1 and are connected to the same fourth runner forming mold 4. The fifth runner forming mold A2, the fifth runner forming mold B6, the fifth runner forming mold C8, and the fifth runner forming mold D7 are connected to the brake drum forming mold 1 has the same tangential angle of the circumferential surface and is less than 30°. The fifth runner forming mold A2 includes two parallel branch runner forming molds. The molten iron is dispersed into the first runner through the main runner, filtered into the second runner through the filter screen 9, flows downward during the process, and then enters the fourth runner through the third runner to obtain a buffer. It is diverted from the fourth runner to the fifth runner, and enters the cavity from all sides of the cavity through an angle less than 30°. The four points rotate with kinetic energy at the same time, and then accelerate the stirring and mixing in the cavity to make the temperature of the molten iron in the cavity as uniform as possible, thereby reducing the influence of the temperature difference on the casting.

[0024] The width of the connecting runner forming die 3 is smaller than that of the fourth runner forming die 4 and the fifth runner forming die.

[0025] The utility model arranges a fifth runner forming mold evenly distributed around the brake drum forming mold 1 and arranges a small angle with the circumference of the brake drum forming mold 1. When molten iron is poured from all around the brake drum, its temperature is more uniform when it rotates and mixes in the cavity, reducing slag flushing, achieving a uniform molten iron temperature in the cavity, and improving the casting quality. The utility model adopts a first runner forming mold 10 and a second runner forming mold 11 to form a runner forming mold inclined downward in the vertical direction. Unexpectedly, the flow rate of molten iron in the runner can be accelerated, achieving the function of accelerating the flow of molten iron and reducing heat loss in the runner.

Claims

1. A casting device for a brake drum, comprising a brake drum forming die (1), a filter screen (9), and a main runner forming die (12), characterized in that: Two symmetrically arranged first runner forming dies (10) are respectively connected to both sides of the lower end of the main runner forming die (12); a second runner forming die (11) is overlapped at the lower end of the first runner forming die (10); a filter screen (9) is arranged between the first runner forming die (10) and the second runner forming die (11); two symmetrically arranged third runner forming dies (5) are arranged at the lower end of the end of the second runner forming die (11); a fourth runner forming die (4) is connected to the end of the third runner forming die (5); and the fourth runner forming die (4) is respectively connected to two fifth runner forming dies via a connecting runner forming die (3).

2. A casting device for a brake drum according to claim 1, characterized in that: The fifth runner forming mold comprises a fifth runner forming mold A (2), a fifth runner forming mold B (6), a fifth runner forming mold C (8), and a fifth runner forming mold D (7) and has the same structure. The fifth runner forming mold A (2) and the fifth runner forming mold B (6) are located on the same side of the brake drum forming mold (1) and are connected to the same fourth runner forming mold (4). The fifth runner forming mold C (8) and the fifth runner forming mold D (7) are located on the same side of the brake drum forming mold (1) and are connected to the same fourth runner forming mold (4).

3. A casting device for a brake drum according to claim 2, characterized in that: The fifth runner forming die A (2), the fifth runner forming die B (6), the fifth runner forming die C (8), the fifth runner forming die D (7) and the brake drum forming die (1) have the same tangential included angle with the circumferential surface, and the included angle is less than 30 degrees.

4. A casting device for a brake drum according to claim 3, characterized in that: The fifth runner forming mold A (2) comprises two parallel branch runner forming molds.

5. A casting device for a brake drum according to claim 1, characterized in that: The upper end surface of the first runner forming die (10) is provided with a first inclined guide surface inclined downward, and the lower end surface of the second runner forming die (11) is provided with a second inclined guide surface inclined downward, and the first inclined guide surface is arranged in parallel with the second inclined guide surface.

6. A casting device for a brake drum according to claim 1, characterized in that: The thickness of the third runner forming die (5) is twice the thickness of the fourth runner forming die (4).

7. A casting device for a brake drum according to claim 1, characterized in that: The width of the connecting runner forming die (3) is smaller than that of the fourth runner forming die (4) and the fifth runner forming die.

8. A casting device for a brake drum according to claim 1, characterized in that: The area of ​​the filter screen (9) is larger than the area of ​​the upper end surface of the second runner forming die (11).

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