An integrated valve arm die structure for a die cast turbocharger

Abstract

The utility model relates to an integral valve arm die head structure for investment casting turbocharger, including sprue and with the T -shaped runner that sprue links, the below of T -shaped runner is connected with main runner and secondary runner, and main, secondary runner parallelly arranged, and there are a plurality of shrinkage portions and expansion casting parts on main, secondary runner and arrange in proper order, the top of T -shaped runner is equipped with the protruding sprue connecting portion, and sprue connecting portion communicates with sprue directly, and the bottom of main, secondary runner is equipped with lengthened positioning nail. In use, through setting up T -shaped runner that communicates with sprue, guarantee casting process smooth and fast, and shrinkage portion and expansion casting part, not only can guarantee product quality, reduced the use amount of medium -temperature wax and metal raw material simultaneously, reduced the risk of shell cracking, improved product quality, reduced production cost. The bottom is equipped with lengthened positioning nail setting, then increase the group tree space of product, increased the overall stability of die head structure, effectively improved production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of investment casting turbocharger technology, specifically an integrated valve arm mold head structure for investment casting turbochargers. Background Technology

[0002] In the current technology, competition among automotive parts manufacturers is becoming increasingly fierce, necessitating improvements in yield and reductions in casting production costs. Because integrated valve arm products are relatively heavy, have thick plates, and long valve bodies, they are irregular castings. Therefore, the sprue needs to be designed to be wide, and the spacing between products is also wide, increasing the yield and requiring a large amount of wax during wax injection, thus increasing costs.

[0003] Meanwhile, the mold head requires more metal material during casting, which reduces the yield of the product and increases the cost. The mold head structure is also relatively heavy, which causes inconvenience to workers and reduces work efficiency.

[0004] Therefore, there is an urgent need for a die head structure that can solve the above problems and improve the yield of castings. Summary of the Invention

[0005] The purpose of this invention is to provide an improved integrated valve arm die head structure for investment casting turbochargers. Through structural improvements, the risk of die shell cracking during production is reduced, the amount of raw materials used is reduced, the yield of products is increased, and costs are lowered.

[0006] To achieve the above objectives, the technical solution of this utility model is: an integrated valve arm mold head structure for investment casting turbochargers, characterized in that: the integrated valve arm mold head structure includes a gate and a T-shaped runner connected to the gate, a main runner and a secondary runner are connected below the T-shaped runner, the main and secondary runners are arranged in parallel, and a number of shrinkage parts and expansion casting parts are arranged sequentially on the main and secondary runners, a protruding gate connection part is provided at the top of the T-shaped runner, the gate connection part is directly connected to the gate, and an extended positioning pin is provided at the bottom of the main and secondary runners.

[0007] Preferably, there are two secondary runners, which are symmetrically arranged on both sides of the main runner. The bottom of the T-shaped runner has three connection ports, which are connected to the main and secondary runners respectively. There is a concave arc groove between the three connection ports.

[0008] Furthermore, there are three main connection ports and two secondary connection ports. Each connection port has internal guide ribs, and the secondary connection ports have gas guide strips on their sides.

[0009] Furthermore, the shrinkage section has symmetrically arranged U-shaped grooves on both sides, the expansion casting section is connected to the casting cavity of the product, and the height of the shrinkage section is greater than or equal to the height of the expansion casting section.

[0010] Furthermore, the length-to-height ratio of the T-shaped runner is 1:0.4-0.85.

[0011] Furthermore, a venting pipe is provided on each side of the gate. One end of the venting pipe is connected to the gate, and the other end is connected to the top of the T-shaped runner to form a connecting interface. A gas guide strip is set between the secondary connection port and the connecting interface.

[0012] Furthermore, the bottoms of the main and secondary runners are connected to each other through the bottom runner.

[0013] Compared with the prior art, the technical solution of this utility model not only improves the overall technical solution, but also includes many detailed improvements. Specifically, it has the following beneficial effects: 1. The improved solution described in this utility model includes an integrated valve arm mold head structure comprising a gate and a T-shaped runner connected to the gate. A main runner and a secondary runner are connected below the T-shaped runner. The main and secondary runners are arranged in parallel. Several shrinkage sections and expansion casting sections are arranged sequentially on the main and secondary runners. This can reduce the amount of medium-temperature wax and metal raw materials used, reduce the risk of mold shell cracking, reduce the overall weight of the mold head, improve casting quality, and reduce costs. 2. In the technical solution of this utility model, the top of the T-shaped gating is provided with a protruding gating connection part, which is directly connected to the gating. The bottom of the main and secondary gatings is provided with extended positioning pins, which increases the product assembly space, greatly improves the yield, and reduces the cost. 3. In the structure of this utility model, a venting pipe is provided on both sides of the gate. One end of the venting pipe is connected to the gate, and the other end is connected to the top of the T-shaped runner to form a connecting interface. The gas guide strip is set between the secondary connection port and the connecting interface, which improves the venting effect during the casting process, avoids the generation of pores and bubbles, and improves product quality. 4. This utility model has a simple structure, reasonable layout, and is easy to use. It reduces the labor intensity of workers during the casting process and is easy to promote and utilize. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of this utility model in use.

[0016] Figure 3 This is a schematic diagram of the upper mold structure during the manufacturing of this utility model.

[0017] Figure 4 This is a schematic diagram of the lower mold structure used in the manufacture of this utility model.

[0018] Figure 5This is a schematic diagram of the core-pulling structure that cooperates with the upper and lower molds during the manufacturing of this utility model.

[0019] Figure label: 1. Gate, 2. T-shaped runner, 3. Main runner, 4. Secondary runner, 5. Extended positioning pin, 6. Upper mold, 7. Lower mold, 8. Core-pulling structure, 9. Slider; 11. Ventilation ducts; 21. Gate connection; 22. Circular arc groove; 31 Shrinkage section, 32 Expansion casting section. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] This utility model provides an integrated valve arm die head structure for investment casting turbochargers. See details below. Figure 1 The difference between this and existing technologies lies in the following: the integrated valve arm mold head structure includes a gate 1 and a T-shaped runner 2 connected to the gate. A main runner 3 is connected to the lower center of the T-shaped runner, and secondary runners 4 are connected to the sides. The main and secondary runners are arranged parallel to each other. Several shrinkage sections 31 and expansion casting sections 32 are arranged sequentially on the main and secondary runners. The shrinkage sections are non-assembly welding parts, which are widened and thinned. The expansion casting sections are welding parts for assembled products, which are widened and thickened. This not only ensures product quality but also reduces the amount of medium-temperature wax and metal raw materials used. Additionally, the top of the T-shaped runner has a protruding gate connection section 21, which is directly connected to the gate. The bottom of the main and secondary runners has extended positioning pins 5.

[0022] In use, the T-shaped sprue connected to the gate ensures a smooth and rapid casting process. Several shrinkage and expansion casting sections are arranged sequentially on the main and secondary runners, which not only guarantees product quality but also reduces the amount of medium-temperature wax and metal raw materials used, lowering the risk of mold shell cracking, improving product quality, and reducing production costs. Furthermore, the extended positioning pins at the bottom of the main and secondary runners increase the product assembly space, enhance the overall stability of the mold head structure, and effectively improve production efficiency.

[0023] Example 1 In this embodiment, the integrated valve arm mold head structure includes a gate 1 and a T-shaped runner 2 connected to the gate. A main runner 3 is connected to the lower center of the T-shaped runner, and secondary runners 4 are connected to the two sides. The main and secondary runners are arranged parallel to each other. Several shrinkage sections 31 and expansion casting sections 32 are arranged sequentially on the main and secondary runners. The shrinkage sections are non-assembly welding parts, which are widened and thinned. The expansion casting sections are welding parts for assembled products, which are widened and thickened. This not only ensures product quality but also reduces the amount of medium-temperature wax and metal raw materials used, effectively reducing mold shell cracking caused by the violent expansion of medium-temperature wax during dewaxing, thus improving product quality. Simultaneously, a protruding gate connection section 21 is provided at the top of the T-shaped runner. The length-to-height ratio of the T-shaped runner is 1:0.4-0.85. The gate connection section is directly connected to the gate. Extended positioning pins 5 are provided at the bottom of the main and secondary runners, increasing the overall stability of the mold head structure and effectively improving production efficiency. The bottoms of the main and secondary runners are connected to each other through the bottom runner, ensuring that the molten metal can quickly and evenly fill the entire cavity during casting.

[0024] Specifically, there are two secondary runners 4, symmetrically arranged on both sides of the main runner. The bottom of the T-shaped runner 2 has three connection ports, which are connected to the main and secondary runners respectively. Between the three connection ports, there is a concave arc groove 22. The two arc grooves are symmetrically arranged. The arc groove near the middle connection port is lower than the arc groove near the two side connection ports, with a drop of 3-8cm, forming a molten metal ramp. At the top of the molten metal ramp, there is a flow-dispersing strip plate to facilitate the dispersion of the casting liquid, so that the casting liquid is more evenly distributed in the three connection ports, improving the synchronization of casting and improving the quality of subsequent products.

[0025] Furthermore, there are three main connection ports and two secondary connection ports. Each connection port has internal guide ribs, and the secondary connection ports have gas guide strips on their sides. A venting pipe 11 is provided on each side of the gating gate 1. One end of the venting pipe is connected to the gating gate, and the other end is connected to the top of the T-shaped runner, forming a connecting interface. The gas guide strip is positioned between the secondary connection port and the connecting interface to facilitate gas outlet, reduce bubble formation, and improve product casting quality.

[0026] Furthermore, symmetrical U-shaped grooves are provided on both sides of the shrinkage section. The depth of these U-shaped grooves accounts for 1 / 5 to 1 / 4 of the width of the shrinkage section. Connecting ribs can also be installed at the U-shaped grooves to maintain overall strength. The expansion casting section is connected to the casting cavity of the product, and the height of the shrinkage section is greater than or equal to the height of the expansion casting section. This also reduces the amount of medium-temperature wax and metal raw materials used, lowers the risk of mold shell cracking, reduces the overall weight of the mold head, improves casting quality, and reduces costs.

[0027] Example 2 In this embodiment, the integrated valve arm mold head structure includes a gate 1 and a T-shaped runner 2 connected to the gate. A main runner 34 is connected to the lower center of the T-shaped runner, and secondary runners 4 are connected to the two sides. The main and secondary runners are arranged parallel to each other. Several shrinkage sections 31 and expansion casting sections 32 are arranged sequentially on the main and secondary runners. The shrinkage sections are non-assembly welding parts; these sections are widened and thinned. The expansion casting sections are welding parts for assembled products; these sections are widened and thickened. This not only ensures the internal quality of the product but also reduces the amount of medium-temperature wax and metal raw materials used. It effectively reduces the problem of mold shell cracking caused by the violent expansion of medium-temperature wax during dewaxing, thus improving product quality. Simultaneously, it reduces the overall weight of the mold head, lowers production costs, and reduces the labor intensity of workers during the casting process.

[0028] Specifically, the top of the T-shaped runner has a raised gate connection. The length-to-height ratio of the T-shaped runner is 1:0.4-0.85, with a preferred height ratio of 1:0.8. The gate connection is directly connected to the gate. The bottom of the main and secondary runners has extended positioning pins, increasing the space for product assembly and allowing for multiple rows of products. Existing technologies can only accommodate 3-4 rows of products. This also increases the overall stability of the mold head structure and effectively improves production efficiency.

[0029] The integrated valve arm mold head structure of this utility model is set between a set of corresponding upper molds 6 and lower molds 7. The bottom of the upper and lower molds is provided with an independently pullable core-pulling structure 8. The bottom of the core-pulling structure is provided with a matching slider 9 to facilitate the individual removal of the core. The shape of the core-pulling structure matches the structure of the gate.

[0030] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An integrated valve arm die structure for investment casting a turbocharger, characterized by: The integrated valve arm mold head structure includes a gate and a T-shaped runner connected to the gate. The main runner and secondary runner are connected below the T-shaped runner. The main and secondary runners are arranged in parallel. Several shrinkage and expansion casting parts are arranged sequentially on the main and secondary runners. The top of the T-shaped runner is provided with a protruding gate connection part, which is directly connected to the gate. The bottom of the main and secondary runners is provided with an extended positioning pin.

2. An integral valve arm die structure for investment casting a turbocharger according to claim 1, wherein: There are two secondary runners, symmetrically located on both sides of the main runner. The bottom of the T-shaped runner has three connection ports, which are connected to the main and secondary runners respectively. There is a concave arc groove between the three connection ports.

3. An integral valve arm die structure for investment casting a turbocharger according to claim 2, wherein: There are three main connection ports and two secondary connection ports. Each connection port has internal guide ribs, and the secondary connection ports have gas guide strips on their sides.

4. The integrated valve arm die head structure for investment casting turbochargers according to claim 1, characterized in that: The shrinkage section has symmetrically arranged U-shaped grooves on both sides, and the expansion casting section is connected to the casting cavity of the product. The height of the shrinkage section is greater than or equal to the height of the expansion casting section.

5. An integral valve arm die structure for investment casting a turbocharger according to claim 1, wherein: The length-to-height ratio of the T-shaped runner is 1:0.4-0.

85.

6. An integral valve arm die structure for investment casting a turbocharger according to claim 3, wherein: A venting pipe is provided on each side of the gate. One end of the venting pipe is connected to the gate, and the other end is connected to the top of the T-shaped runner to form a connecting interface. A gas guide strip is set between the secondary connection port and the connecting interface.

7. An integral valve arm die structure for investment casting a turbocharger according to claim 1 wherein: The bottoms of the main and secondary runners are connected to each other through the bottom runner.

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