High-precision clutch flange partition sand core casting system

Abstract

The present invention discloses a high-precision clapboard sand core pouring system for a clutch flange, including a template, a symmetrical clapboard core arranged in the template, a cavity arranged on both sides of the clapboard core, a sprue arranged between the two clapboard cores, a main cross runner arranged on both sides of the lower part of the sprue and extending to the bottom of the cavity, a riser arranged on both sides of the clapboard core and connected to the top of the corresponding cavity, and a secondary cross runner arranged on both sides of the upper part of the sprue and extending into the riser; a plurality of ingates are arranged on the main cross runner, each ingate is connected to an ingate that is respectively connected to the cavity on both sides of the clapboard core, the ingate is connected to the casting pressure edge in the cavity, the sprue is a gradient flow channel that is wide at the top and narrow at the bottom, the top of the sprue is connected to a pouring cup, and a semi-open pouring ratio is formed between the pouring cup and the cavity. The present invention realizes the casting without production defects and improves production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of casting, and in particular relates to a partition sand core casting system for a high-precision clutch flange. Background Art

[0002] The clutch flange product has an overall wall thickness of 5-10mm, which is a typical thin-walled casting. The casting has high dimensional accuracy requirements, and the overall wall thickness can reach CT5 level when converted into national standards. At the same time, customers have high requirements for the appearance quality and internal quality of the castings. The appearance is not allowed to have defects such as pores, sand holes, and holes, and the castings are not allowed to have defects such as cold beans and shrinkage.

[0003] The casting of this product has a large outline size, with a diameter of up to 280mm. However, due to its thin wall thickness and light weight, the unit weight is only about 3 kilograms. The large overall size and light unit weight limit the number of products that can be arranged on the template, resulting in a low casting yield. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a high-precision clutch flange partition sand core casting system, so as to achieve no production defects in castings and improve production efficiency. In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A partition sand core pouring system for a high-precision clutch flange comprises a template, a partition core symmetrically arranged in the template, cavities arranged on both sides of the partition core, a sprue arranged between the two partition cores, a main cross runner arranged on both sides of the lower part of the sprue and extending to the bottom of the cavity, risers arranged on both sides of the partition core and connected to the top of the corresponding cavity, and secondary cross runners arranged on both sides of the upper part of the sprue and extending into the risers; a plurality of ingates are arranged on the main cross runner, each ingate is connected to an ingate which is respectively connected to the cavity on both sides of the partition core, the ingate is connected to the pressure edge of the casting in the cavity, the sprue is a gradient flow channel which is wide at the top and narrow at the bottom, the top of the sprue is connected to a pouring cup, and a semi-open pouring ratio is formed between the pouring cup and the cavity.

[0006] Specifically, the cross-sectional area of ​​the sprue close to the pouring cup is larger than the cross-sectional area of ​​the sprue close to the main runner.

[0007] Specifically, the inner gate includes a bottom cavity plate and side cavity plates connecting two sides of the bottom cavity plate, and the inner gate is an overall U-shaped structure.

[0008] Specifically, the bottom center position of the bottom cavity plate is connected to the inner runner, and the bottom cavity plate is attached to the bottom arc position of the partition core.

[0009] Specifically, the pouring inlet area of ​​the side cavity plate is larger than the pouring outlet area thereof.

[0010] Specifically, the inner side of the side cavity plate is attached to the partition core and extends to the side edge of the cavity, and a 2-3 mm margin is left where the inner side of the side cavity plate intersects with the outer side of the cavity.

[0011] Specifically, a connecting strip is provided between the sprue and the main runner, and the inner cavity cross section of the connecting strip is smaller than the cross section of the main runner.

[0012] Specifically, a connecting block is provided between the sprue and the secondary runner, and the inner cavity cross section of the connecting block is larger than the cross section of the secondary runner.

[0013] Specifically, two groups of cavities are arranged in the template, each group of cavities has two cavities, the top of each group of cavities is connected to a corresponding group of risers, and the spacing between the risers is 6-7 mm.

[0014] Compared with the prior art, the beneficial effects of the high-precision clutch flange partition sand core casting system of the present invention are mainly reflected in:

[0015] The use of partition cores can increase the cavity position in the limited space of the template, thereby increasing the number of castings; the pouring system adopts a bilaterally symmetrical structure, which makes the molten iron filling process smooth and achieves rapid filling; the pressure edge connection method between the inner gate and the casting and the tapered gradient structure of the straight runner ensure that the pouring system can be separated smoothly when the casting is completed, avoiding sand holes from entering the cavity and improving the appearance of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of the present invention;

[0017] Figure 2 It is a structural schematic diagram of this embodiment;

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of

[0019] Figure 4 is a cross-sectional view of the center position of the riser of this embodiment;

[0020] Figure 5 for Figure 4 A partial enlarged schematic diagram of

[0021] The numbers in the figure represent:

[0022] 1 template, 11 partition core, 12 casting, 2 sprue, 21 pouring cup, 3 main runner, 31 connecting strip, 4 riser, 5 secondary runner, 51 connecting block, 6 ingates, 7 ingates, 71 bottom cavity plate, 72 side cavity plate, 73 pouring inlet, 74 pouring outlet, 75 edge holding amount. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Example:

[0025] Reference Figure 1-5 As shown, the present embodiment is a high-precision baffle sand core casting system for a clutch flange, comprising a template 1, a baffle core 11 symmetrically arranged in the template 1, a cavity arranged on both sides of the baffle core 11, a sprue 2 arranged between the two baffle cores 11, a main cross runner 3 arranged on both sides of the lower part of the sprue 2 and extending to the bottom of the cavity, risers 4 arranged on both sides of the baffle core 11 and connected to the top of the corresponding cavity, and secondary cross runners 5 arranged on both sides of the upper part of the sprue 2 and extending into the riser 4; a plurality of ingates 6 are arranged on the main cross runner 3, each ingate 6 is connected to an ingate 7 which is respectively connected to the cavity on both sides of the baffle core 11, the ingate 7 is connected to the edge of the casting 12 in the cavity, the sprue 2 is a gradient runner which is wide at the top and narrow at the bottom, and a semi-open casting ratio is formed between the pouring cup 21 and the cavity.

[0026] The template 1 is provided with a partition core 11 , and cavities are respectively arranged on both sides of the partition core 11 , so that the main runner 3 and the inner gate 6 are completely symmetrical, and a smooth filling process is ensured. The cavity is partially embedded in the partition core 11 .

[0027] The top of the sprue 2 is connected with a pouring cup 21, and the cross-sectional area of ​​the sprue 2 near the pouring cup 21 is larger than the cross-sectional area near the main runner 3. The gradual structure of the sprue 2 allows the molten iron in the mold to be quickly filled and effectively remove dross. The structure with a wide top and a narrow bottom makes it easier to float the dross out of the molten iron surface during the downward flushing of the molten iron.

[0028] In this embodiment, the casting 12 in the mold cavity is a high-precision clutch flange, and the casting 12 is a disc structure.

[0029] The inner gate 7 includes a bottom cavity plate 71 and a side cavity plate 72 connected to both sides of the bottom cavity plate 71. The inner gate 7 is a U-shaped structure as a whole. The bottom center of the bottom cavity plate 71 is connected to the inner gate 6. The bottom cavity plate 71 is attached to the bottom arc position of the partition core 11. The area of ​​the pouring inlet 73 of the side cavity plate 72 is larger than the area of ​​its pouring outlet 74, and impurities in the molten iron are concentrated at the pouring inlet 73 to avoid entering the cavity.

[0030] The inner side of the side cavity plate 72 is attached to the partition core 11 and extends to the side of the cavity. The inner side of the side cavity plate 72 intersects with the outer side of the cavity leaving a 2-3mm edge pressure 75, which is convenient for the subsequent effective separation of the castings in the cavity and the complete molding of the casting 12.

[0031] The cross-sectional area of ​​the connection between the sprue 2 and the pouring cup 21: the cross-sectional area of ​​the connection between the sprue 2 and the main runner 3: the cross-sectional area of ​​the main runner 3: the cross-sectional area of ​​the ingode 6: the area of ​​the pouring outlet 74 of the ingode 7 is 1.1:1:1.2:1.5:2. The connection between the sprue 2 and the main runner 3 is a closed pouring ratio in the direction of the pouring cup 21, and the connection between the sprue 2 and the main runner 3 is an open pouring ratio in the direction of the cavity, so as to ensure that after the molten iron in the cavity is fully filled, the molten iron in the secondary runner 5 enters the riser 4, effectively preventing the riser 4 from entering the water in advance, splashing and producing internal defects such as cold beans.

[0032] A connecting block 51 is provided between the sprue 2 and the secondary runner 5. The inner cavity cross-section of the connecting block 51 is larger than the cross-section of the secondary runner 5. The connecting block 51 effectively ensures the storage heat of the molten iron, ensures the shrinkage compensation effect when it flows into the riser 4, and effectively prevents shrinkage problems from occurring inside the casting 12.

[0033] A connecting strip 31 is provided between the sprue 2 and the main runner 3. The inner cavity section of the connecting strip 31 is smaller than the section of the main runner 3. The connecting strip 31 effectively ensures the storage heat of the molten iron, so that the heat loss in the filling process in the cavity is reduced.

[0034] In this embodiment, two groups of cavities are arranged in the template 1, each group of cavities has two cavities, and the casting 12 in each group of cavities is arranged relative to the clamping partition core. A corresponding group of risers 4 is connected to the top of each group of cavities, and the spacing between a group of risers 4 is 6-7mm, so that a group of risers 4 can be easily separated and achieve a common heating effect, thereby enhancing the shrinkage compensation effect of the risers 4 and avoiding the internal defects of shrinkage.

[0035] When applying this embodiment, the partition core 11 can be used to increase the cavity position in the limited space within the template 1, thereby increasing the number of castings; the pouring system adopts a bilaterally symmetrical structure, which makes the molten iron filling process smooth and achieves rapid filling; the pressure edge connection method between the inner gate 7 and the casting 12, and the tapered gradient structure of the straight runner 2 ensure that the pouring system can be separated smoothly when the casting is completed, avoiding sand holes from entering the cavity, and improving the appearance of the casting.

[0036] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. High-precision clutch flange partition sand core casting system, characterized by: It includes a template, a symmetrical baffle core arranged in the template, cavities arranged on both sides of the baffle core, a sprue arranged between the two baffle cores, a main cross runner arranged on both sides of the lower part of the sprue and extending to the bottom of the cavity, risers arranged on both sides of the baffle core and connected to the top of the corresponding cavity, and a secondary cross runner arranged on both sides of the upper part of the sprue and extending into the riser; a plurality of ingates are arranged on the main cross runner, each ingate is connected to an ingate respectively connected to the cavity on both sides of the baffle core, the ingate is connected to the pressure edge of the casting in the cavity, the sprue is a gradient flow channel with a wide top and a narrow bottom, a pouring cup is connected to the top of the sprue, and a semi-open pouring ratio is formed between the pouring cup and the cavity; The inner gate comprises a bottom cavity plate and side cavity plates connecting two sides of the bottom cavity plate, and the inner gate is an overall U-shaped structure; The cross-sectional area of ​​the sprue close to the pouring cup is larger than the cross-sectional area close to the main runner; The pouring inlet area of ​​the side cavity plate is larger than the pouring outlet area; The inner side of the side cavity plate is attached to the partition core and extends to the side of the cavity, and the inner side of the side cavity plate intersects with the outer side of the cavity with a 2-3mm margin; A connecting strip is provided between the sprue and the main runner, and the inner cavity section of the connecting strip is smaller than the section of the main runner; A connecting block is provided between the sprue and the secondary runner, and the inner cavity section of the connecting block is larger than the section of the secondary runner; The cross-sectional area of ​​the connection between the straight runner and the pouring cup: the cross-sectional area of ​​the connection between the straight runner and the main cross runner: the cross-sectional area of ​​the main cross runner: the cross-sectional area of ​​the inner runner: the pouring outlet area of ​​the inner gate is 1.1:1:1.2:1.5:

2.

2. The high-precision clutch flange partition sand core casting system according to claim 1 is characterized in that: The bottom center position of the bottom cavity plate is connected to the inner runner, and the bottom cavity plate is attached to the bottom arc position of the partition core.

3. The high-precision clutch flange partition sand core casting system according to claim 1 is characterized in that: Two groups of cavities are arranged in the template, each group of cavities has two cavities, the top of each group of cavities is connected with a corresponding group of risers, and the spacing between the risers is 6-7mm.

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