Die-casting die integral sleeve structure with spacer blocks

Abstract

The utility model discloses a kind of die-casting die overall material cylinder structures with cushioning block, it includes material cylinder body and cushioning block, the top of material cylinder body is provided with inlet, cushioning block is set to the top of material cylinder body, upper and lower through-flow passage is opened in the inside of cushioning block, the lower end of flow channel is butt-jointed with the inlet of material cylinder body and communicates, the upper end of flow channel constitutes the inlet of cushioning block, for with the outlet of chute of die-casting machine butt-jointed and communicate;Advantage is that it can effectively solve the inlet of material cylinder and the outlet of chute height incompatibility caused by aluminum liquid splashing, turbulent flow problem, and the inlet of material cylinder is directly impacted by aluminum liquid and caused by local premature damage problem.

Description

Technical Field

[0001] This utility model belongs to the field of die casting mold technology, and relates to an integral material cylinder structure for die casting mold, and more particularly to an integral material cylinder structure for die casting mold with a shim block. By adding the shim block, it effectively optimizes the introduction process of aluminum liquid and reduces local damage at the material inlet of the cylinder. Background Technology

[0002] In the die casting production process, the integral barrel (also known as the material cylinder) is a key component connecting the die casting machine and the mold. It is responsible for introducing molten aluminum from the die casting machine's injection system into the mold cavity, and its performance directly affects the quality of the castings and its own service life.

[0003] In the prior art, several improvement schemes have emerged to improve casting quality and the service life of the cylinder. For example, the Chinese invention patent application "An Oil-Cooled Integral Cylinder for Die Casting Mold" (Publication No.: CN112548067A) includes: a body, on which multiple oil passages are provided along the height direction of the body sidewall, and two adjacent oil passages are connected within the body. Each oil passage is connected to one end of the body to form an oil inlet and an oil outlet, and the oil outlet is connected to the oil inlet through an oil passage; and an aluminum liquid inlet formed on the upper part of the body, which allows the aluminum liquid to be die-cast to flow into the interior of the body. The advantages of this cylinder are: by setting multiple oil passages within the cylinder body, and circulating constant-temperature oil within the oil passages to maintain a constant cylinder temperature, the constant-temperature oil heats the cylinder to a certain temperature and maintains it, which can increase the service life of the cylinder body and reduce the temperature difference between the aluminum liquid to be die-cast and the cylinder, thereby effectively reducing the fractured chill layer in the aluminum liquid and improving the internal quality of the casting. This type of feed cylinder mainly focuses on the temperature control problem inside the feed cylinder.

[0004] However, existing technologies, such as the structure disclosed in CN112548067A, still have the following technical problems that have not been effectively solved in practical applications: 1. In existing integral casting cylinders, the height of the inlet (i.e., the aluminum molten material inlet) is usually single and fixed. However, the height and position of the chute for conveying aluminum molten material are also fixed for different models and tonnages of die-casting machines, and cannot be easily changed. This "fixed-to-fixed" matching mode leads to serious compatibility difficulties: when there is a height deviation between the outlet of the chute and the inlet of the cylinder, the aluminum molten material cannot flow smoothly and accurately from the chute into the cylinder. The specific drawbacks are: 1) When the aluminum molten material falls from the chute, due to the vertical drop and poor inlet angle, it will impact the inner wall of the cylinder at a high speed, generating splashing and turbulence. This process easily draws air into the aluminum molten material, leading to defects such as porosity and inclusions inside the casting; 2) The splashed aluminum molten material not only wastes valuable metal materials, but also adheres to the ground and the outer wall of the cylinder, increasing the amount of on-site cleaning work.

[0005] 2. The feed inlet area of ​​the barrel is the most demanding working environment in the entire barrel, as it is subjected to the thermal shock and mechanical erosion of high-temperature molten aluminum for a long time. This makes this area the weakest link in the barrel's lifespan, leading to premature cracking, corrosion, and other damage, significantly shortening the barrel's service life. However, since the barrel is a single unit, failure in a critical area means replacing the entire expensive barrel, increasing maintenance costs and downtime for the die-casting machine.

[0006] Therefore, there is an urgent need in this field for a solution that can flexibly adjust the height of the feed inlet of the barrel, improve the smoothness of aluminum liquid introduction, and extend the service life of the barrel. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to provide an integral material cylinder structure for die casting mold with a shim block, which can effectively solve the problems of aluminum liquid splashing and turbulence caused by the mismatch between the height of the material cylinder inlet and the liquid outlet of the chute, as well as the problem of premature local damage to the material cylinder inlet caused by direct impact of aluminum liquid.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an integral material cylinder structure for a die-casting mold with a shim block, including a material cylinder body, the top of which is provided with a material inlet, characterized in that it also includes a shim block, the shim block is disposed on the top of the material cylinder body, the shim block has a vertically penetrating flow channel inside, the lower end of the flow channel is connected to and communicates with the material inlet of the material cylinder body, and the upper end of the flow channel constitutes the material inlet of the shim block, which is used to connect to and communicate with the liquid outlet of the chute of the die-casting machine.

[0009] The flow channel has vertically extending venting grooves on its sidewalls. In this structure, the venting grooves help to expel gases that may be carried by the molten aluminum during its flow, further preventing gases from being carried away by the molten aluminum and drawn into the mold cavity. This significantly reduces the risk of defects such as porosity and inclusions in the casting, and improves the internal quality and density of the casting.

[0010] The exhaust channels are multiple and evenly distributed circumferentially along the flow channel. In this structure, the multiple circumferentially evenly distributed exhaust channels ensure more efficient gas discharge, avoid local gas accumulation, and make the exhaust more uniform and efficient.

[0011] The lower part of the shim block extends into and fits precisely into the inlet of the barrel body. This structure ensures precise positioning between the shim block and the inlet of the barrel body, preventing misalignment or movement of the shim block during production and ensuring unobstructed flow and alignment. This tight fit also prevents molten aluminum from seeping out from the connection gaps.

[0012] The height of the shim block is designed so that the component containing the outlet of the chute extends into and fits precisely into the inlet of the shim block. This structure achieves a sealed transition from the chute to the shim block, allowing the molten aluminum to directly enter the flow channel of the shim block after exiting the chute's outlet, completely avoiding falling and splashing in the air and fundamentally eliminating the resulting air entrapment problem. This fitted structure forces the molten aluminum to flow along the predetermined flow channel wall, greatly suppressing the generation of turbulence, promoting a stable, laminar flow state of the molten aluminum, and further improving the quality of the casting.

[0013] The flow channel is a tapered channel that is wider at the top and narrower at the bottom. In this structure, the tapered design makes it easier for the upper inlet of the channel to receive the molten aluminum from the chute, and then gradually converges and accelerates during the descent, acting as a funnel. The tapered design conforms to fluid dynamics, enabling the molten aluminum to flow more smoothly, reducing eddies and energy losses caused by abrupt changes in the flow cross-section, and helping to maintain the temperature and fluidity of the molten aluminum.

[0014] Compared with the prior art, the advantages of this utility model are: 1) By adding an independent shim block to the feed inlet of the barrel body, the height of the actual working feed inlet can be flexibly adjusted without changing the original structure of the barrel body. This allows for a smooth and precise connection with the outlet of the chute at different heights. The flow channel inside the shim block forms a gentle transition channel between the chute and the barrel body, providing a controlled flow path for the molten aluminum. This fundamentally improves the splashing and turbulence of molten aluminum caused by the direct impact of the height difference on the barrel body, significantly reducing the risk of air being drawn into the molten aluminum, thereby reducing defects such as porosity and inclusions inside the casting. At the same time, it avoids the waste of metal materials caused by splashing molten aluminum and the increased workload of on-site cleaning.

[0015] 2) As a replaceable component, the shim block withstands long-term, concentrated thermal shock and mechanical erosion from molten aluminum. When it is damaged due to erosion, only the shim block needs to be replaced, without replacing the more expensive and complex-to-machine cylinder body, thus reducing the cost of replacement parts. This replacement operation is simpler and faster, significantly shortening maintenance time and effectively reducing the downtime of the die-casting machine and the resulting production losses caused by component replacement.

[0016] 3) The overall barrel structure is simple. By simply adding a shim to the original structure, a barrel body of one specification can be adapted to die-casting machines of different models and tonnages, which is highly versatile. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the assembled material cylinder and chute. Figure 2 for Figure 1 The main view; Figure 3 for Figure 2 Axial sectional view; Figure 4 This is a schematic diagram of the exploded structure of the entire barrel; Figure 5 This is a schematic diagram of the three-dimensional structure of the raised block. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] This utility model proposes an integral barrel structure for a die-casting mold with a shim block, as shown in the figure. It includes a barrel body 1 and a shim block 2. The barrel body 1 adopts a conventional structure. An aluminum liquid channel 11 is opened axially inside the barrel body 1. An inlet 12 with a larger top and a smaller bottom is provided at the top of the barrel body 1. The inlet 12 of the barrel body 1 is connected to the aluminum liquid channel 11. The shim block 2 is an auxiliary component for the aluminum liquid to enter the barrel body 1 through the chute 3. The shim block 2 is set at the top of the barrel body 1. The shim block 2 is larger at the top and smaller at the bottom. A vertically penetrating flow channel 21 is opened inside the shim block 2. The lower end of the flow channel 21 is connected to and connected to the inlet 12 of the barrel body 1. The upper end of the flow channel 21 forms the inlet of the shim block 2, which is used to connect to and connect to the outlet 31 of the chute 3 of the die-casting machine to receive the aluminum liquid from the chute 3.

[0020] The preferred embodiment is that a semi-circular venting groove 23 is provided on the side wall of the flow channel 21, which runs vertically through the flow channel 21. The venting groove 23 helps to discharge the gas that may be carried by the aluminum liquid during the flow process, and further prevents the gas from being carried by the aluminum liquid and rolled into the mold cavity, thereby significantly reducing the risk of defects such as porosity and slag inclusion in the casting, and improving the internal quality and density of the casting.

[0021] Furthermore, there are four exhaust slots 23, which are evenly distributed circumferentially along the flow channel 21. In this structure, the multiple circumferentially evenly distributed exhaust slots 23 ensure more efficient gas discharge, avoid local gas accumulation, and make the exhaust more uniform and efficient.

[0022] Further defining the design, the lower part of the shim block 2 extends into and is precisely embedded within the inlet 12 of the barrel body 1. This structure ensures precise positioning between the shim block 2 and the inlet 12 of the barrel body 1, preventing misalignment or movement of the shim block 2 during production and ensuring the unobstructed flow channel 21 and alignment. This tight fit also prevents molten aluminum from leaking out from the connection gaps. The height of the shim block 2 is designed so that the component containing the outlet 31 of the chute 3 extends into and is precisely embedded within the inlet of the shim block 2. This structure achieves a sealed transition from the chute 3 to the shim block 2. After the molten aluminum exits from the outlet 31 of the chute 3, it directly enters the flow channel 21 of the shim block 2, completely avoiding falling and splashing in the air, fundamentally eliminating the resulting air entrapment problem. This fitted structure forces the molten aluminum to flow along the predetermined flow channel 21 wall, greatly suppressing the generation of turbulence, promoting a stable, laminar flow state of the molten aluminum, and further improving the casting quality.

[0023] The preferred design is that the flow channel 21 is a conical flow channel that is wider at the top and narrower at the bottom. In this structure, the conical flow channel design makes it easier for the upper inlet of the flow channel 21 to receive the molten aluminum from the chute 3, and then gradually converges and accelerates during the descent, playing a positive role as a funnel; the conical design conforms to fluid dynamics, which can make the molten aluminum flow more smoothly, reduce the eddies and energy loss caused by the sudden change in the flow cross section, and help maintain the temperature and fluidity of the molten aluminum.

[0024] In this embodiment, the material of the shim block 2 can be the same as that of the barrel body 1, such as H13 steel, whose surface is quenched and nitrided to ensure sufficient high temperature resistance and erosion resistance, thus extending its service life. When the shim block 2 is damaged due to long-term use, it can be easily and quickly replaced separately without replacing the barrel body 1.

[0025] During operation, molten aluminum flows out of the chute 3 of the die-casting machine and smoothly into the feed inlet of the raised block 2. Due to the height matching, the flow of molten aluminum is smooth, avoiding splashing and turbulence. The molten aluminum flows sequentially through the flow channel 21 of the raised block 2 and the molten aluminum channel 11 of the barrel body 1, and is finally injected into the mold cavity.

[0026] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A die-casting mold integral barrel structure with a shim block, comprising a barrel body, wherein a material inlet is provided at the top of the barrel body, characterized in that... It also includes a shim block, which is disposed on the top of the barrel body. The shim block has a vertically penetrating flow channel inside. The lower end of the flow channel is connected to and communicates with the feed inlet of the barrel body, and the upper end of the flow channel constitutes the feed inlet of the shim block, which is used to connect to and communicate with the liquid outlet of the chute of the die-casting machine.

2. The integral cylinder structure of a die-casting mold with a raised block according to claim 1, characterized in that... The sidewall of the flow channel is provided with an exhaust groove that runs vertically through it.

3. The integral cylinder structure of a die-casting mold with a raised block according to claim 2, characterized in that... There are multiple exhaust slots, which are evenly distributed along the circumference of the flow channel.

4. A die-casting mold integral cylinder structure with a shim block according to any one of claims 1 to 3, characterized in that... The lower part of the shim extends into and is fitted into the feed inlet of the barrel body.

5. The integral barrel structure of a die-casting mold with a raised block according to claim 4, characterized in that... The height of the shim block is designed so that the component containing the liquid outlet of the chute extends into and is precisely embedded in the feed inlet of the shim block.

6. The integral barrel structure of a die-casting mold with a raised block according to claim 1, characterized in that... The flow channel is a tapered flow channel that is wider at the top and narrower at the bottom.

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