A die casting machine nozzle sleeve

Abstract

The utility model provides a kind of die casting machine sprue bush, including the connecting rod of sintering and integrally formed using powder metallurgy process connecting seat, the connecting seat is located at one end of connecting rod, the connecting seat is with the connecting rod and is along the connecting channel of being passed through being opened in the axial direction of connecting rod, the connecting channel is tapered channel, the diameter of the connecting channel gradually increases from the one end of connecting seat to the other end of connecting rod. The sprue bush of the application has the advantages of long service life and low comprehensive manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of die casting machine component design technology, and in particular to a die casting machine sprue sleeve. Background Technology

[0002] The sprue bushing is an important component of the die-casting machine. It forms the sprue, ensuring smooth operation of the injection punch, stable material pressure transmission and filling, and is a metal part used to connect the molding die and the injection molding machine.

[0003] The utility model patent with publication number CN222519933U, entitled "A Die Casting Sprue Sleeve," discloses a sprue rod and an inner sprue rod. The inner sprue rod is detachably installed inside the outer sprue rod. A heat dissipation cavity is formed between the outer sprue rod and the inner sprue rod, and a heat dissipation mechanism is provided inside the heat dissipation cavity. The heat dissipation mechanism includes several sets of annular tubes, which are evenly sleeved on the outside of the inner sprue rod from top to bottom. A transfer pipe is connected between two adjacent sets of annular tubes. Connecting pipes are connected to the side walls of the two sets of annular tubes located at the top and bottom. A water inlet pipe and a water outlet pipe are threaded onto the two sets of connecting pipes, respectively. Both the water inlet pipe and the water outlet pipe are installed on the outer sprue rod.

[0004] Similar to the above-mentioned sprue bushing, various components are connected through various connectors. In actual use, since the sprue bushing is often used under high temperature and high pressure, there is a great risk that the connectors will fatigue or crack prematurely during use, and the sealing reliability between various components may be compromised. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a die-casting machine sprue bushing, which solves the technical problems of short service life and high processing cost of existing sprue bushings.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A die-casting machine sprue sleeve includes a connecting seat and a connecting rod sintered and integrally formed using powder metallurgy. The connecting seat is located at one end of the connecting rod. A connecting channel with both ends is formed along the axial direction of the connecting rod on the connecting seat and the connecting rod. The connecting channel is a tapered channel, and the diameter of the connecting channel gradually increases from one end of the connecting seat to the other end of the connecting rod.

[0007] The present invention is further configured such that: a pre-embedded pipe for cooling is provided inside the connecting rod, the pre-embedded pipe is arranged circumferentially around the connecting channel inside the connecting rod, and both ends of the pre-embedded pipe are connected to the outside of the connecting rod.

[0008] The present invention is further configured such that: the end of the connecting rod away from the connecting seat is provided with an interface groove for connecting with the die-casting machine.

[0009] The present invention is further configured such that: the side of the connecting seat away from the connecting rod is provided with a connecting structure for connecting to an external pipe.

[0010] The present invention is further configured such that: the connecting structure includes a connecting groove and a plurality of threaded grooves, the connecting groove is connected to one end of the connecting channel, and the plurality of threaded grooves are circumferentially distributed on the connecting seat with the connecting groove as the axis.

[0011] The present invention is further configured such that a positioning port is provided on one side of the connecting seat.

[0012] Compared to the beneficial effects achieved by existing technologies: This application uses powder metallurgy to integrally sinter the connecting seat and connecting rod of the sprue sleeve, and sets the internal connecting channel as a tapered structure with the diameter gradually increasing from the connecting seat to the end of the connecting rod. The synergistic effect of this integral design and the specific tapered channel effectively avoids the interface leakage and stress concentration problems that are prone to occur in traditional split splicing structures under high temperature and high pressure environments, and significantly improves the overall structural strength and sealing reliability. Meanwhile, the unique reverse conical channel design can accelerate the flow of molten metal, enhance its flow kinetic energy, and thus ensure that the molten metal fills the die-casting mold cavity at a higher speed and more smoothly. Furthermore, the powder metallurgy technology itself gives the parts a uniform micro-pore structure, which enhances the thermal shock resistance and service life of the sprue bushing. The integrated molding process simplifies the production process and achieves near-net-shape forming of complex internal cavity structures, thereby improving the consistency of product performance while reducing the overall manufacturing cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the internal structure of an embodiment of the present utility model.

[0014] In the above attached diagram: 1. Connecting seat; 2. Connecting rod; 3. Connecting channel; 4. Embedded pipe; 5. Interface groove; 6. Connecting groove; 7. Threaded groove; 8. Positioning port. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example: Reference Figures 1-4 This application relates to a die-casting machine gating sleeve, comprising a connecting seat 1 and a connecting rod 2 integrally formed by sintering using powder metallurgy. The connecting seat 1 is located at one end of the connecting rod 2. A connecting channel 3, which extends through both ends, is formed on the connecting seat 1 and the connecting rod 2 along the axial direction of the connecting rod 2. The connecting channel 3 is a tapered channel, and its diameter gradually increases from one end of the connecting seat 1 to the other end of the connecting rod 2. Figure 3 and Figure 4 As shown, the connecting rod 2 is equipped with a pre-embedded pipe 4 for cooling. The pre-embedded pipe 4 is arranged circumferentially around the connecting channel 3 inside the connecting rod 2. The shape of the pre-embedded pipe 4 can be freely adjusted according to the shape of the sprue sleeve. During the production of the connecting rod 2, the pre-embedded pipe 4 needs to be placed into the sintering mold first. Both ends of the pre-embedded pipe 4 are connected to the outside of the connecting rod 2. Water inlet pipe and water outlet pipe are connected to the two ends of the pre-embedded pipe 4 respectively. Water flows along the pre-embedded pipe 4 and passes through the inner wall of the connecting rod 2 to cool the connecting rod 2.

[0017] like Figure 2 and Figure 4 As shown, the end of the connecting rod 2 away from the connecting seat 1 has an interface groove 5 for connecting with the die-casting machine. (See Figure 1.) Figure 3 and Figure 4 As shown, the connecting seat 1 has a connecting structure for connecting to an external pipe on the side away from the connecting rod 2. The connecting structure includes a connecting groove 6 and several threaded grooves 7. The connecting groove 6 communicates with one end of the connecting channel 3, and the several threaded grooves 7 are circumferentially distributed on the connecting seat 1 with the connecting groove 6 as the axis. A positioning port 8 is provided on one side of the connecting seat 1. The design of these components facilitates the connection of the sprue sleeve with the die-casting machine and the external discharge pipe.

[0018] Working principle: During operation, molten aluminum enters the conical connecting channel 3 from the interface groove 5 on one side of the connecting rod 2 through the external die casting machine. Since the diameter of the connecting channel 3 gradually increases from one end of the connecting seat 1 to the other end of the connecting rod 2, it forms a tapered structure at the outlet of the die casting machine. This structure can accelerate the flow of molten aluminum and increase its flow kinetic energy, thereby ensuring that the molten aluminum fills the die casting mold cavity at a higher speed and more smoothly, and is conducive to the formation of dense castings. In the die casting process, in order to control the temperature of the sprue sleeve and prevent the molten aluminum from solidifying or adhering prematurely, cooling is achieved through a ring-shaped pre-embedded pipe 4 embedded inside the connecting rod 2. This pipe is integrally embedded in the connecting rod 2 during sintering and is arranged around the connecting channel 3. Its two ends are connected to the water inlet pipe and the water outlet pipe, respectively. By continuously supplying cooling water, the water flows along the pipe to effectively remove the heat from the inner wall and surrounding area of ​​the connecting rod 2, thereby achieving active cooling. Meanwhile, the interface groove 5 at the end of the connecting rod 2 away from the connecting seat 1 is used to fix it to the injection mechanism or mold, ensuring that the sprue sleeve is positioned firmly on the die casting machine. The connecting groove 6, the circumferentially distributed threaded groove 7, and the positioning port 8 on the connecting seat 1 together form a connection structure with the external pipeline, which not only ensures the material inlet is sealed but also facilitates installation and alignment, so that the entire sprue sleeve can stably and reliably complete the delivery and cooling regulation of molten aluminum during the high-pressure and high-temperature die casting process.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gate sleeve for a die-casting machine, characterized in that: The device includes a connecting seat (1) and a connecting rod (2) sintered and integrally formed by powder metallurgy. The connecting seat (1) is located at one end of the connecting rod (2). The connecting seat (1) and the connecting rod (2) have a connecting channel (3) that runs through both ends along the axial direction of the connecting rod (2). The connecting channel (3) is a tapered channel, and the diameter of the connecting channel (3) gradually increases from one end of the connecting seat (1) to the other end of the connecting rod (2).

2. The die-casting machine gating sleeve according to claim 1, characterized in that: The connecting rod (2) is provided with a pre-embedded pipe (4) for cooling. The pre-embedded pipe (4) is circumferentially arranged in the connecting rod (2) along the connecting channel (3). Both ends of the pre-embedded pipe (4) are connected to the outside of the connecting rod (2).

3. The die-casting machine gating sleeve according to claim 1, characterized in that: The connecting rod (2) has an interface groove (5) at the end away from the connecting seat (1) for connecting with the die-casting machine.

4. The die-casting machine gate sleeve according to claim 1, characterized in that: The connecting seat (1) has a connecting structure for connecting to an external pipe on the side away from the connecting rod (2).

5. A die-casting machine gating sleeve according to claim 4, characterized in that: The connection structure includes a connecting groove (6) and several threaded grooves (7). The connecting groove (6) is connected to one end of the connecting channel (3), and the several threaded grooves (7) are circumferentially distributed on the connecting seat (1) with the connecting groove (6) as the axis.

6. The die-casting machine gating sleeve according to claim 1, characterized in that: The connecting seat (1) has a positioning port (8) on one side.

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