A multiple-gate die structure for investment casting a turbocharger

Abstract

The utility model relates to a kind of for multiple-gate die structure of die casting turbocharger, including sprue and several runners being communicated with sprue, several runners include being set in main runner of middle part and being set in side runner of main runner both sides, side runner of both sides is along main runner symmetrically arranged, main runner and side runner are parallelly arranged between, the width of main runner is greater than side runner, the top of main runner is equipped with the main runner import being cooperated with sprue, the bottom of die structure is equipped with supporting leg. In implementation, main runner is thickened, other side runner is reduced in width and meat, since main runner is widened, stress point is dispersed, thereby avoid the fracture condition caused by insufficient stress intensity in manufacturing operation process, simultaneously, the reduction in width and meat of side runner reduces the use amount of medium-temperature wax, reduces the cracking risk when shell is dewaxed, reduces production cost.

Description

Technical Field

[0001] This utility model relates to the technical field of investment casting turbocharger technology, specifically a multi-sprue mold head structure for investment casting turbochargers. Background Technology

[0002] In the existing technology, the mold head for assembling parts in the market is usually a straight sprue type mold head, and the mold pieces are welded to the vertical sprue in sequence at equal intervals when assembling the wax mold.

[0003] Because of the need to provide a high yield, it is necessary to design multi-sprue molds with three, four, or five runners. Since multi-sprue molds produce more and heavier products, they need to be widened and thickened. This requires a lot of wax material to be consumed during wax injection, which increases costs.

[0004] The mold head requires more metal material during casting, which reduces the yield of the product and increases costs.

[0005] 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

[0006] The purpose of this invention is to provide an improved multi-sprue mold head structure for investment casting turbochargers. Through structural improvements, the strength of the mold head structure is increased, the yield is improved, and the production cost is reduced.

[0007] To achieve the above objectives, the technical solution of this utility model is: a multi-sprue mold head structure for investment casting turbochargers, characterized in that: the mold head structure includes a gate and several runners connected to the gate, the several runners include a main runner located in the middle and side runners located on both sides of the main runner, the side runners on both sides are symmetrically arranged along the main runner, the main runner and the side runners are arranged parallel to each other, the width of the main runner is greater than that of the side runners, the top of the main runner is provided with a main runner inlet that cooperates with the gate, and the bottom of the mold head structure is provided with support feet.

[0008] Preferably, the width ratio of the main gating to the side gating is 1:0.7-9, the main gating inlet is funnel-shaped, and the inner wall of the main gating inlet is provided with guide strips.

[0009] Furthermore, the number of runners is 3-9, with the ratio of main runners to side runners being 1:2-6.

[0010] Furthermore, the main runner and the side runners are housed within a runner housing. The top and bottom of the runner housing are respectively provided with runner connecting cavities, and the top and bottom of the main runner and the side runners are respectively connected to the runner connecting cavities.

[0011] Furthermore, symmetrical ventilation pipes are provided on both sides of the gate, and the ventilation pipes are connected to the top gating cavity.

[0012] Furthermore, a connecting plate is provided between the main runner and the side runner. The connecting plate is located on the top of the main runner and the side runner, and the top of the connecting plate is 3-8mm lower than the top of the main runner and the side runner. The bottom of the connecting plate is provided with an arc-shaped groove.

[0013] Furthermore, the sidewalls of the gating system are reinforced with ribs. The top of the gating system has a ring of outwardly protruding fixing edges.

[0014] 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 a mold head structure comprising a gate and several runners connected to the gate. The runners include a main runner located in the middle and side runners located on both sides of the main runner. The side runners on both sides are symmetrically arranged along the main runner. The main runner and the side runners are arranged in parallel. The width of the main runner is greater than that of the side runners. The top of the main runner is provided with a main runner inlet that matches the gate. By widening the main runner, the stress points are dispersed, thereby avoiding breakage due to insufficient stress strength during the shell making process. At the same time, the risk of cracking of the mold head structure during shell dewaxing is reduced, and the production cost is reduced. 2. In the technical solution of this utility model, the number of gating channels is 3-9, wherein the ratio of the number of main gating channels to side gating channels is 1:2-6, the ratio of the width of the main gating channel to the width of the side gating channels is 1:0.7-9, and the inlet of the main gating channel is funnel-shaped. The above structure reduces the amount of medium-temperature wax and metal raw materials used in the manufacturing process, improves the yield of castings, and saves costs. 3. In the structure of this utility model, a connecting plate is provided between the main runner and the side runner. The connecting plate is located at the top of the main runner and the side runner. The top of the connecting plate is 3-8mm lower than the top of the main runner and the side runner. The bottom of the connecting plate is provided with an arc-shaped groove. The above structure strengthens the stability of the connection, ensures the strength of the overall structure, and improves the service life. 4. This utility model has a simple structure and reasonable layout, making it easy to promote and utilize. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0017] Figure 3 This is a schematic diagram of the front mold structure used in the manufacture of this utility model.

[0018] Figure 4 This is a schematic diagram of the rear mold structure used in the manufacture of this utility model.

[0019] Figure label: 1. Gate, 2. Main runner, 3. Side runner, 4. Support feet, 5. Runner shell, 6. Ventilation pipe, 7. Connecting plate, 8. Front mold structure, 9. Rear mold structure; 11. Fixed edge; 21. Main gating inlet; 51. The gating system connects to the cavity; 71. Circular arc-shaped groove. 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 a multi-sprue mold head structure for investment casting turbochargers, see details below. Figure 1 The difference between this and the existing technology is that the mold head structure includes a gate 1 and several runners connected to the gate. The runners include a main runner 2 located in the middle and side runners 3 located on both sides of the main runner. The side runners on both sides are symmetrically arranged along the main runner. The main runner and the side runners are arranged in parallel. The width of the main runner is greater than that of the side runners. The top of the main runner is provided with a main runner inlet 21 that matches the gate. The bottom of the mold head structure is provided with support feet 4.

[0022] In practice, the main gating system is thickened, while the other side gating systems are widened and de-walled. Widening the main gating system disperses the stress points, thus preventing breakage due to insufficient strength during manufacturing. At the same time, widening and de-walling the side gating systems reduces the amount of medium-temperature wax used, lowers the risk of cracking during mold shell dewaxing, and reduces production costs.

[0023] Example 1 This embodiment describes a multi-sprue die head structure for investment casting turbochargers; see details below. Figure 1 The mold head structure includes a gate 1 and several runners connected to the gate. The runners include a main runner 2 located in the middle and side runners 3 located on both sides of the main runner. The side runners on both sides are symmetrically arranged along the main runner. The main runner and the side runners are arranged in parallel. The width of the main runner is greater than that of the side runners. The top of the main runner is provided with a main runner inlet 21 that matches the gate. The bottom of the mold head structure is provided with support feet 4.

[0024] Specifically, the width ratio of the main runner to the side runner is 1:0.7-9, preferably 1:0.8. By increasing the width of the main runner and decreasing the width of the side runners, the structural strength in the middle is ensured, the overall structural stability is improved, and cracking during demolding is avoided. The main runner inlet is funnel-shaped, and the inner wall of the main runner inlet is equipped with guide strips.

[0025] like Figure 1 As shown, there are 5 runners, including 1 main runner and 4 side runners, which are symmetrically distributed along the main runner in pairs.

[0026] The main runner and side runners are housed within a runner shell 5. A ring of raised reinforcing ribs surrounds the shell to ensure the overall structural strength and stability. The top and bottom of the runner shell are respectively provided with runner connecting cavities 51. The top and bottom of the main runner and side runners are connected to the runner connecting cavities, which can ensure rapid pouring during casting, avoid the formation of air holes, and ensure that the solution temperature remains consistent in each cavity during casting to avoid molding problems.

[0027] Furthermore, symmetrically arranged venting pipes 6 are provided on both sides of the gate 1, and the venting pipes are connected to the top runner cavity. A connecting plate 7 is provided between the main runner and the side runner, and the connecting plate is located at the top of the main runner and the side runner. The top of the connecting plate is 3-8mm lower than the top of the main runner and the side runner. The bottom of the connecting plate has an arc-shaped groove 71, which reduces the material used and at the same time provides effective connection and facilitates demolding. Furthermore, the side wall of the side runner is provided with reinforcing ribs. The top of the gate has a ring of outwardly protruding fixing edge 11 to maintain stability during pouring.

[0028] Example 2 This embodiment describes a multi-sprue mold head structure for investment casting turbochargers. The mold head structure includes a gate 1 and several runners connected to the gate. The runners include a main runner 2 located in the middle and side runners 3 located on both sides of the main runner. The side runners on both sides are symmetrically arranged along the main runner. The main runner and the side runners are arranged parallel to each other. The width of the main runner is greater than that of the side runners. The top of the main runner is provided with a main runner inlet 21 that matches the gate. The bottom of the mold head structure is provided with support feet 4.

[0029] Specifically, the multi-sprue mold head structure uses a combined mold for casting, such as... Figure 3 , Figure 4 As shown, this combined mold includes a front mold structure 8 and a rear mold structure 9. The mold head structure is split in the middle, with one half located in the front mold and the other half in the rear mold. The front and rear molds are separated for demolding.

[0030] The structure of this utility model involves widening and thickening the central main gating section, while reducing the width and thickness of other sprues. For example, the width of the main gating is 21mm, and the width of the side gating is 16mm. This structure reduces the use of medium-temperature wax, minimizes breakage caused by insufficient strength of the main gating during manufacturing, improves product quality, and extends service life.

[0031] The advantages of this utility model are as follows: 1. The main sprue is thickened and the side sprues are narrowed and trimmed to distribute the stress points and thus prevent the mold head structure from breaking due to insufficient stress during operation.

[0032] 2. Due to the reduced width and material removal of the side sprue structure, the overall weight of the mold head can be reduced while ensuring product quality. This also reduces the amount of medium-temperature wax used during manufacturing and lowers the risk of cracking during mold shell dewaxing.

[0033] 3. This utility model has an ingenious structural design, reasonable layout, and simple operation. It reduces the amount of medium-temperature wax and metal raw materials used, improves the yield of castings, and saves costs.

[0034] 4. The total weight of the mold head structure was reduced, which reduced the labor intensity of workers during the shell making and casting process.

[0035] 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. A multiple gate die structure for investment casting a turbocharger, characterized by: The mold head structure includes a gate and several runners connected to the gate. The runners include a main runner located in the middle and side runners located on both sides of the main runner. The side runners on both sides are symmetrically arranged along the main runner. The main runner and the side runners are arranged in parallel. The width of the main runner is greater than that of the side runners. The top of the main runner is provided with a main runner inlet that matches the gate. The bottom of the mold head structure is provided with support feet.

2. The multi-sprue mold head structure for investment casting turbochargers according to claim 1, characterized in that: The width ratio of the main runner to the side runner is 1:0.7-9. The main runner inlet is funnel-shaped, and the inner wall of the main runner inlet is provided with guide strips.

3. The multi-sprue mold head structure for investment casting turbochargers according to claim 1, characterized in that: The number of runners is 3-9, with the ratio of main runners to side runners being 1:2-6.

4. The multi-sprue mold head structure for investment casting turbochargers according to claim 1, characterized in that: The main runner and the side runners are housed in a runner shell. The top and bottom of the runner shell are respectively provided with runner connecting cavities, and the top and bottom of the main runner and the side runners are respectively connected to the runner connecting cavities.

5. A multi-sprue mold head structure for investment casting turbochargers according to claim 4, characterized in that: Symmetrical ventilation pipes are provided on both sides of the gate, and the ventilation pipes are connected to the top gating cavity.

6. The multi-sprue mold head structure for investment casting turbochargers according to claim 1, characterized in that: A connecting plate is provided between the main runner and the side runner. The connecting plate is located on the top of the main runner and the side runner. The top of the connecting plate is 3-8mm lower than the top of the main runner and the side runner. The bottom of the connecting plate is provided with an arc-shaped groove.

7. A multi-sprue mold head structure for investment casting turbochargers according to claim 1, characterized in that: The side walls of the side gutter are reinforced.

8. A multi-sprue mold head structure for investment casting turbochargers according to claim 1, characterized in that: The top of the gate has a fixed edge that protrudes outward.

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