Exhaust mechanism of magnesium alloy steering wheel skeleton die-casting mold

Abstract

An exhaust mechanism of a magnesium alloy steering wheel framework die-casting die belongs to the technical field of steering wheel processing, overcomes the problems of large die size, small exhaust capacity, poor exhaust effect and damage to the die of the direct exhaust structure, and is characterized in that the steering wheel framework is uniformly distributed with an exhaust mechanism on the wheel rim. The exhaust mechanism includes an exhaust groove, an overflow groove, an overflow port, an exhaust needle and a ejector pin. An exhaust channel is arranged between the bottom of the overflow groove and the exhaust needle on the exhaust groove. The beneficial effect is that the gas enters the exhaust needle through the bottom exhaust channel of the overflow groove and is discharged from the exhaust needle. The die structure is simplified, the corresponding processing size of the die is saved, the exhaust capacity is large, the cost of the exhaust mechanism is reduced, the problem of damaging the die is fundamentally solved, the service life of the die and the yield of the product are improved, and more settings can be made at the positions of the steering wheel framework that need exhaust according to needs, meeting the needs of different steering wheel framework die-casting dies.

Description

Technical Field

[0001] This utility model belongs to the field of steering wheel processing technology, and specifically relates to an exhaust mechanism for a magnesium alloy steering wheel die-casting mold. Background Technology

[0002] The steering wheel frame is a major component of the steering wheel. During the die-casting process of the steering wheel frame blank, venting is necessary. In existing technologies, venting mechanisms suffer from problems such as large mold size but small venting volume and poor venting effect. For example, application CN201521123418.8 discloses a "Die-casting Mold Venting Mechanism," which includes a rear template with a rear mold core. The rear mold core has a herringbone-shaped venting groove, with several venting ports at the lower end of the venting groove connected to mold cavities on the rear mold core, and a wavy venting plate at the upper end, mounted on the rear template. Application CN202411858988.5 (publication number CN119566263A) discloses a "Die-casting Mold for a Steering Wheel Frame with Adjustable Rivet Column Height," which also incorporates this feature. The invention employs exhaust plates for venting. According to the specification of the invention patent application, the exhaust holes on the secondary guide plate and the exhaust grooves on the side end face of the template body are connected to the exhaust plates. As can be seen from the accompanying drawings, the invention has multiple exhaust plates, and the exhaust holes are connected to the exhaust plates through the exhaust grooves. In particular, the exhaust grooves connected to each exhaust plate have different shapes, with at least one curved channel, and multiple exhaust channels are provided in parallel on each exhaust plate. The gas is vented out of the mold in a wave-like manner. Both of the above-mentioned venting mechanisms have the problem of large mold size but small venting volume and poor venting effect.

[0003] The invention disclosed in application number CN201510872621.3 (publication number CN106001496A) is a "car steering wheel frame mold and casting method". The steering wheel frame mold of this invention consists of an annular frame, spokes, a slag collection bag, an exhaust groove, a transverse runner, a sprue sleeve, an inner gate, a square box, a fixed mold, and a moving mold. This invention provides a magnesium alloy car steering wheel frame and casting method. The steering wheel frame material of this invention is magnesium alloy. However, during die casting, the molten magnesium alloy flows upward from the sprue sleeve through the transverse runner and the inner gate, first filling the square box part, and then filling the annular frame through the four spokes. The two liquid flows meet at the annular frame. Therefore, the exhaust mechanism of this invention occupies a large mold space and is a direct exhaust structure, which is prone to material sticking during exhaust, carrying out small magnesium alloy liquid particles, which not only wastes material but also damages the mold.

[0004] Utility model application CN201720276957.8 discloses a "steering wheel venting slag bag structure". In this utility model, the steering wheel frame is fixed in a mold and communicates with a slag bag device through a vent hole. The slag bag device includes a slag bag, a slag bag cover, fixing bolts, and ejector pin holes. The slag bag communicates with the vent hole, and the slag bag cover is fixed to the mold by the fixing bolts and seals the slag bag. An ejector pin hole for placing ejector pins is provided at the bottom of the slag bag. This utility model provides ejector pin holes at the bottom of the slag bag so that ejector pins can be added when the slag bag is not needed. That is, the slag bag connected to the vent hole at the point without ejector pins serves as the venting channel. Therefore, this utility model also involves direct venting, which also has the problem of material sticking during venting, carrying out tiny magnesium alloy liquid particles, resulting in waste and damage to the mold.

[0005] The utility model application with application number CN202021743943.0 discloses "an exhaust device for die castings". The utility model includes an ejector plate, a moving mold and a fixed mold; an ejector pin and an exhaust pin are provided between the ejector plate and the moving mold; the exhaust pin can pass through the moving mold; the ejector pin and the exhaust pin are arranged in parallel. According to the accompanying drawings and description of this utility model, a workpiece can be placed between the moving mold and the fixed mold. The venting device provided by this utility model has a venting pin that passes through the moving mold and connects to the workpiece. A venting hole is provided at the connection between the moving mold and the venting pin. The ejector pin is also connected to the workpiece. Therefore, this utility model adds a venting pin to the end of the trapped gas. The venting ejector pin is designed with a self-cleaning step and slides with the venting hole. When the product is ejected, the venting pin automatically cleans the residue remaining in the venting hole, ensuring the venting hole is unobstructed. Furthermore, the ejector pin and venting pin of this utility model are connected to the workpiece, venting the workpiece from within. Its venting channel is long and direct, easily carrying out small magnesium alloy liquid particles. Although the venting pin can automatically clean the residue remaining in the venting hole, the problem of mold damage is not fundamentally solved. Utility Model Content

[0006] The problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an exhaust mechanism for a magnesium alloy steering wheel die-casting mold that changes the exhaust direction and exhausts outside the workpiece. This simplifies the mold structure, saves the corresponding processing dimensions of the mold, shortens the exhaust channel, and does not carry out tiny magnesium alloy liquid particles, thereby improving the exhaust effect and fundamentally solving the problem of mold damage.

[0007] The technical solution adopted by this utility model includes a steering wheel frame, on which exhaust mechanisms are evenly distributed circumferentially on the wheel rim. The exhaust mechanism includes an exhaust groove, an overflow groove in front of the exhaust groove, and an overflow port communicating with the overflow groove at the lower end of the overflow groove. The exhaust mechanism is connected to the air passage of the steering wheel frame through the overflow port. An exhaust needle mounting hole is provided on the exhaust groove, and a push pin mounting hole is provided on the overflow groove. An exhaust needle is installed in the exhaust needle mounting hole, and a push pin is installed in the push pin mounting hole. A gradually stepped exhaust channel is provided between the bottom of the overflow groove and the exhaust needle on the exhaust groove.

[0008] The exhaust mechanism is installed on the outer ring of the steering wheel frame wheel rim on the upper and lower sides of the steering wheel frame. On the left and right sides of the steering wheel frame wheel rim, the exhaust mechanism is installed on both the outer ring and the inner ring of the steering wheel frame wheel rim.

[0009] The exhaust groove has 4 to 8 exhaust pin mounting holes, and the overflow groove has 1 to 2 ejector pin mounting holes.

[0010] The steering wheel frame is made of AM50A magnesium alloy.

[0011] The exhaust channel is a gradually tapering stepped shape.

[0012] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model sets an exhaust mechanism outside the workpiece. After the gas passes through the bottom of the overflow groove on the exhaust groove and the exhaust needle, it enters the exhaust needle and is discharged from the exhaust needle. This solves the problem that the direct exhaust structure is prone to material sticking during exhaust, which will bring out small magnesium alloy liquid particles, resulting in waste and damage to the mold. The exhaust effect is good, which fundamentally solves the problem of mold damage and improves the service life of the mold and the yield of the product.

[0013] (2) This utility model does not come into contact with the mold and the workpiece itself, thus simplifying the mold structure and saving the corresponding processing dimensions of the mold. However, it has a large exhaust volume, which can reduce the mold area by 20% and also reduce the cost of the exhaust mechanism.

[0014] (3) In this utility model, the exhaust mechanism is installed on the outer ring of the wheel rim of the steering wheel frame on both the upper and lower sides. On the left and right sides of the steering wheel frame, the exhaust mechanism is installed on both the outer and inner rings of the wheel rim of the steering wheel frame. The exhaust mechanism can also be set in more positions on the outer ring, inner ring and other locations of the steering wheel frame where exhaust is required, in order to meet the exhaust needs of different steering wheel frame die casting molds. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the steering wheel frame structure of this utility model. Figure 2 yes Figure 1 Top view, Figure 3 This is a front view of the exhaust mechanism of this utility model. Figure 4 yes Figure 3 A sectional view along AA.

[0016] In the picture: 1. Steering wheel frame, 2. Exhaust mechanism, 2-1. Exhaust channel, 2-2. Overflow channel 2-3. Overflow outlet 2-4. Exhaust pin mounting hole, 2-5. Ejector pin mounting hole, 2-6. Venting needle, 2-7. Threshold pin, 2-8. Exhaust passage. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2 As shown, the technical solution adopted by this utility model includes a steering wheel frame 1, the material of which is AM50A magnesium alloy. Exhaust mechanisms 2 are evenly distributed circumferentially on the wheel rim of the steering wheel frame 1. Specifically, the exhaust mechanisms 2 are installed on the outer rim of the wheel rim on the upper and lower sides of the steering wheel frame 1; exhaust mechanisms 2 are also installed on the outer and inner rims of the wheel rim on the left and right sides of the steering wheel frame 1. The exhaust mechanisms 2 can also be further configured on the outer rim, inner rim, and other locations on the steering wheel frame where exhaust is required, as needed.

[0019] like Figure 3 and Figure 4 As shown, the exhaust mechanism 2 includes a cuboid exhaust groove 2-1, an overflow groove 2-2 in front of the exhaust groove 2-1, and an overflow port 2-3 communicating with the overflow groove 2-2 at the lower end of the overflow groove 2-2. The exhaust mechanism 2 is connected to the air passage of the steering wheel frame 1 through the overflow port 2-3. There are 4 to 8 exhaust needle mounting holes 2-4 on the exhaust groove 2-1, and 1 to 2 ejector pin mounting holes 2-5 on the overflow groove 2-2. An exhaust needle 2-6 is installed in the exhaust needle mounting hole 2-4, and an ejector pin 2-7 is installed in the ejector pin mounting hole 2-5. A gradually changing stepped exhaust channel 2-8 is provided between the bottom of the overflow groove 2-2 and the exhaust needle 2-6 on the exhaust groove 2-1.

[0020] During die casting, the steering wheel frame 1 is fixed in the mold. The high-pressure, high-speed and high-temperature magnesium alloy liquid generated by die casting, along with the gas, enters the overflow groove 2-2 through the overflow port 2-3. The gas is squeezed into the gradually stepped exhaust channel 2-8 on the exhaust groove 2-1 through the overflow groove 2-2, enters the exhaust needle 2-6 from the bottom, and is discharged from the exhaust needle 2-6.

Claims

1. An exhaust mechanism for a magnesium alloy steering wheel frame die-casting mold, comprising a steering wheel frame (1), wherein exhaust mechanisms (2) are evenly distributed circumferentially on the rim of the steering wheel frame (1), characterized in that, The exhaust mechanism (2) includes an exhaust groove (2-1), an overflow groove (2-2) is provided in front of the exhaust groove (2-1), and an overflow port (2-3) communicating with the overflow groove (2-2) is provided at the lower end of the overflow groove (2-2). The exhaust mechanism (2) is connected to the air passage of the steering wheel frame (1) through the overflow port (2-3). An exhaust needle mounting hole (2-4) is provided on the exhaust groove (2-1), a push pin mounting hole (2-5) is provided on the overflow groove (2-2), an exhaust needle (2-6) is installed in the exhaust needle mounting hole (2-4), a push pin (2-7) is installed in the push pin mounting hole (2-5), and an exhaust channel (2-8) is provided between the bottom of the overflow groove (2-2) and the exhaust needle (2-6) on the exhaust groove (2-1).

2. The exhaust mechanism of a magnesium alloy steering wheel frame die-casting mold according to claim 1, characterized in that, On the upper and lower sides of the steering wheel frame (1), the exhaust mechanism (2) is installed on the outer rim of the steering wheel frame (1). On the left and right sides of the steering wheel frame (1), the outer rim and inner rim of the steering wheel frame (1) are both equipped with exhaust mechanisms (2).

3. The exhaust mechanism of a magnesium alloy steering wheel frame die-casting mold according to claim 1 or 2, characterized in that, The venting groove (2-1) has 4 to 8 venting needle mounting holes (2-4), and the overflow groove (2-2) has 1 to 2 ejector pin mounting holes (2-5).

4. The exhaust mechanism of a magnesium alloy steering wheel frame die-casting mold according to claim 3, characterized in that, The steering wheel frame (1) is made of AM50A magnesium alloy.

5. The exhaust mechanism of a magnesium alloy steering wheel frame die-casting mold according to claim 4, characterized in that, The exhaust channels (2-8) are gradually stepped.

Images