Rear steering gear housing mold

Abstract

The utility model discloses a rear steering gear shell mould, including fixed mould mechanism, movable mould mechanism, first core pulling mechanism, extrusion mechanism and point cold pipe, and the fixed mould plate of fixed mould mechanism and the movable mould plate of movable mould mechanism form the cavity, and the cavity is used for the die casting product, the first material reducing slider and first core pulling rod of first core pulling mechanism are used for the extension in the cavity, to reduce the wall thickness of product in the region of corresponding first material reducing slider and form first pre -casting hole, the extrusion pin rod of extrusion mechanism is used for the extension in the cavity, and extrusion pin rod extrusion solution under semi - solidified state can reduce the internal shrinkage of product in the region close to first pre -casting hole, improves the quality of product, and extrusion pin rod is equipped with cooling runner, and the delivery channel of point cold pipe communicates with cooling runner, and the delivery channel is used for the delivery and recovery coolant to extrusion pin rod cooling.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and in particular to a rear steering gear housing mold. Background Technology

[0002] In traditional rear steering gear housing products, in order to ensure the safety characteristics of the product, the wall thickness of some areas is relatively large. Therefore, the corresponding molds are also suitable for producing products with large wall thickness. For products made of aluminum alloy die casting, aluminum alloy has shrinkage characteristics, which can easily lead to internal defects during the die casting process. The die casting production cycle is long, the production efficiency is low, and the mold heats up, resulting in a short mold life. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rear steering gear housing mold that can reduce the shrinkage defect of the product.

[0004] A rear steering gear housing mold according to an embodiment of the present invention includes a fixed mold mechanism, a moving mold mechanism, a first core-pulling mechanism, an extrusion mechanism, and a cooling pipe. The fixed mold mechanism includes a fixed mold base and a fixed template disposed on the fixed mold base; the moving mold mechanism includes a moving mold base and a moving template disposed on the moving mold base, wherein a cavity is formed between the fixed template and the moving template, and the cavity is used for die casting to form a product; the first core-pulling mechanism includes a first driving member, a first reducing slider, and a plurality of first core-pulling rods disposed on the first reducing slider, wherein the output end of the first driving member is connected to the first reducing slider, and the first driving member is used to drive the first reducing slider and the first core-pulling rods to extend into the cavity. The cavity is designed to reduce the wall thickness of the product in the region corresponding to the first material reduction slider and to form a first pre-cast hole. The extrusion mechanism includes an extrusion drive, a connecting rod, and an extrusion pin. The number of extrusion pins is equal to that of the first core-pulling rods. One extrusion pin is coaxially arranged with one first core-pulling rod. The extrusion drive is connected to the extrusion pins through the connecting rod. The extrusion drive is used to drive the extrusion pins to extend into the cavity to press the product. The extrusion pins are provided with cooling channels. The delivery channel of the cooling pipe is connected to the cooling channels. The delivery channel is used to deliver and recover coolant to the cooling channels to cool the extrusion pins.

[0005] It has at least the following beneficial effects:

[0006] During product die casting, the fixed mold mechanism and the moving mold mechanism are closed. The first driving component drives the first material-reducing slider and the first core-pulling rod to move towards the cavity, causing them to extend into the cavity. Then, the product-making solution is injected into the cavity. The first material-reducing slider reduces the wall thickness of the product in the area corresponding to it, and the first core-pulling rod forms a first pre-cast hole in the area corresponding to it. When the product-making solution is in a semi-solid state, the extrusion driving component drives the extrusion pin to move towards the cavity, causing it to extend into the cavity. The extrusion pin extrudes the semi-solid solution, reducing inward shrinkage of the product near the first pre-cast hole and improving product quality.

[0007] According to some embodiments of this utility model, it further includes a second core-pulling mechanism and a third core-pulling mechanism. The structures of the second core-pulling mechanism and the third core-pulling mechanism are the same as those of the first core-pulling mechanism. The second core-pulling mechanism and the third core-pulling mechanism are arranged opposite to each other to reduce the wall behind the product in the area corresponding to the second material-reducing slider and the area corresponding to the third material-reducing slider, and to form through holes on the product.

[0008] According to some embodiments of the present invention, the first core-pulling mechanism, the extrusion mechanism, the second core-pulling mechanism, and the third core-pulling mechanism are arranged in a cross shape.

[0009] According to some embodiments of the present invention, the extrusion mechanism further includes an extrusion pin sleeve, which is disposed on the fixed template or the moving template, and the extrusion pin sleeve is provided with a first guide hole, through which the extrusion pin rod passes.

[0010] According to some embodiments of the present invention, the fixed mold base or the moving mold base is provided with a third clearance hole, the connecting rod passes through the third clearance hole and extends to the outside of the fixed mold base or the moving mold base, the side wall of the connecting rod is provided with a receiving groove, and the cooling pipe is provided in the receiving groove and extends to the outside of the fixed mold base or the moving mold base.

[0011] According to some embodiments of the present invention, a sprue sleeve is also included, a liquid inlet channel is formed between the fixed template and the moving template, the liquid inlet channel is connected to the cavity, and a sprue sleeve is formed with a sprue passage connected to the liquid inlet channel.

[0012] According to some embodiments of the present invention, the fixed mold base is provided with a fixed mold limiting groove and a first mounting hole. The fixed mold limiting groove and the first mounting hole are connected. The fixed mold plate is disposed in the fixed mold limiting groove. The gate is sleeved in the first mounting hole and abuts against the fixed mold plate, so that the gate channel is connected to the liquid inlet channel.

[0013] According to some embodiments of this utility model, it also includes multiple exhaust mechanisms, an exhaust channel is formed between the fixed template and the moving template, the exhaust channel is connected to the cavity, and an exhaust chamber is formed in the exhaust mechanism that is connected to the exhaust channel.

[0014] According to some embodiments of the present invention, the exhaust mechanism includes two interlocking plates, a longitudinal air passage and a plurality of parallel transverse air passages are formed between the two interlocking plates, the longitudinal air passage connects the middle part of all the transverse air passages and the exhaust passage, and the longitudinal air passage and all the transverse air passages form the exhaust chamber.

[0015] According to some embodiments of this utility model, it also includes a stripper plate and multiple stripper rods disposed on the stripper plate. The moving mold base and the moving mold plate are respectively provided with multiple second guide holes and multiple third guide holes. The stripper rods extend into the cavity through the second guide holes and the third guide holes to drive the product in the cavity to detach from the moving mold plate.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the product structure according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0021] Figure 4 This is a structural diagram of the present invention after concealing the fixed mold base and the moving mold base;

[0022] Figure 5 This is a structural diagram of the present invention with the fixed mold mechanism and the moving mold base concealed in an embodiment;

[0023] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0024] Figure 7 This is a schematic diagram of the structure of the first core-pulling mechanism and the extrusion mechanism in an embodiment of this utility model;

[0025] Icon labels:

[0026] Product 10, First pre-cast hole 11, Through hole 12;

[0027] Fixed mold mechanism 100, fixed mold base 110, fixed mold plate 120, sprue bushing 130;

[0028] Moving mold mechanism 200, moving mold base 210, moving mold plate 220, stripper plate 230;

[0029] Cavity 300, liquid inlet channel 310, exhaust channel 320;

[0030] First core-pulling mechanism 400, first driving component 410, first material-reducing slider 420, first core-pulling rod 430;

[0031] Extrusion mechanism 500, extrusion drive component 510, connecting rod 520, extrusion pin 530, extrusion pin sleeve 540;

[0032] Cooling pipe 600;

[0033] Second core-pulling mechanism 700;

[0034] Third core-pulling mechanism 800;

[0035] Exhaust mechanism 900. Detailed Implementation

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0039] Reference Figure 1It is known that the product 10 has through holes 12 penetrating both ends of the product 10, and the outer wall of the product 10 is provided with a number of first pre-cast holes 11 and a number of second pre-cast holes. The first pre-cast holes 11 and the second pre-cast holes are coaxially arranged, and the axial direction of the first pre-cast holes 11 is perpendicular to the axial direction of the through holes 12.

[0040] Reference Figures 2 to 5 This utility model discloses a rear steering gear housing mold, including a fixed mold mechanism 100, a moving mold mechanism 200, a first core-pulling mechanism 400, an extrusion mechanism 500, and a cooling pipe 600. The fixed mold mechanism 100 includes a fixed mold base 110 and a fixed mold template 120. The moving mold mechanism 200 includes a moving mold base 210 and a moving mold template 220. Fixed mold limiting grooves and moving mold limiting grooves are respectively provided on the opposing sides of the fixed mold base 110 and the moving mold base 210. The fixed mold template 120 is disposed in the fixed mold limiting groove of the fixed mold base 110, and the moving mold template 220 is disposed in the moving mold limiting groove of the moving mold base 210. A cavity 300 is formed between the fixed mold template 120 and the moving mold template 220. The cavity 300 is used for die casting to form a product 10.

[0041] Reference Figures 5 to 7 The first core-pulling mechanism 400 includes a first driving member 410, a first material-reducing slider 420, and a plurality of first core-pulling rods 430 disposed on the first material-reducing slider 420. The output end of the first driving member 410 is connected to the first material-reducing slider 420. The first driving member 410 is used to drive the first material-reducing slider 420 and the first core-pulling rods 430 to extend into the cavity 300, so as to reduce the wall thickness of the product 10 in the area corresponding to the first material-reducing slider 420 and form the first pre-cast hole 11.

[0042] The extrusion mechanism 500 includes an extrusion drive 510, a connecting rod 520, and an extrusion pin 530. The number of extrusion pins 530 is equal to that of the first core-pulling rods 430. One extrusion pin 530 is coaxially arranged with one first core-pulling rod 430. The extrusion drive 510 is connected to the extrusion pins 530 through the connecting rod 520. The extrusion drive 510 is used to drive the extrusion pins 530 to extend into the cavity 300 to press the product 10 and form the second pre-cast hole.

[0043] When die-casting product 10, the fixed mold mechanism 100 and the moving mold mechanism 200 are closed. The first driving member 410 drives the first reducing slider 420 and the first core-pulling rod 430 to move towards the cavity 300, so that the first reducing slider 420 and the first core-pulling rod 430 extend into the cavity 300. Then, the solution for making product 10 is injected into the cavity 300. The first reducing slider 420 can reduce the wall thickness of product 10 in the area corresponding to the first reducing slider 420, and the first core-pulling rod 430 forms a first pre-cast hole 11 in the area corresponding to the first reducing slider 420. When the solution for making product 10 is in a semi-solid state, the extrusion driving member 510 drives the extrusion pin 530 to move towards the cavity 300, so that the extrusion pin 530 extends into the cavity 300. The extrusion pin 530 extrudes the solution in the semi-solid state, which can reduce the inward shrinkage of product 10 in the area near the first pre-cast hole 11 and improve the quality of product 10.

[0044] The extrusion pin 530 is equipped with a cooling channel, and the delivery channel of the cooling pipe 600 is connected to the cooling channel. The cooling pipe 600 is used to connect to the cooling equipment. The cooling equipment, the cooling pipe 600, and the cooling pipe 600 form a cooling circulation channel. The delivery channel is used to deliver and recover coolant to the cooling channel. The coolant cools the extrusion pin 530, which can accelerate the temperature in the area corresponding to the extrusion pin 530 on the product 10 and prevent the formation of hot spots. This reduces the formation of internal defects in the product 10, improves the structural strength of the product 10, and ensures the safety characteristics of the product 10.

[0045] Reference Figure 4 or Figure 5 The first core-pulling mechanism 400 also includes a bracket, and the first driving member 410 is connected to the fixed mold base 110 or the moving mold base 210 through the bracket. The first driving member 410 is a cylinder or a hydraulic cylinder. The fixed mold base 110 or the moving mold base 210 is provided with a first clearance hole, and the fixed template 120 or the moving template 220 is provided with a second clearance hole. The second clearance hole communicates with the cavity 300. The first material-reducing slider 420 is connected to the fixed mold base 110 or the moving mold base 210 through a slider, and the first material-reducing slider 420 passes through the first clearance hole and the second clearance hole. The output end of the first driving member 410 passes through the first clearance hole, and the output end of the first driving member 410 is connected to the first core-pulling rod 430 through the slider. A sensor is connected to the output end of the first driving member 410 or the first material-reducing slider 420. The sensor is used to detect the movement position of the output end of the first driving member 410 or the first material-reducing slider 420, thereby facilitating the monitoring of the position of the first driving member 410 and the first material-reducing slider 420.

[0046] One of the fixed mold base 110 and the moving mold base 210 is provided with multiple guide pillars, and the other is provided with multiple guide sleeves. The multiple guide pillars are respectively inserted into the multiple guide sleeves, and the guide pillars and guide sleeves play the role of guiding the moving direction of the moving mold base 210.

[0047] Reference Figure 4 or Figure 5 In some embodiments, the rear steering gear housing mold further includes a second core-pulling mechanism 700 and a third core-pulling mechanism 800, the structures of which are the same as those of the first core-pulling mechanism 400, and the second core-pulling mechanism 700 and the third core-pulling mechanism 800 are arranged opposite to each other.

[0048] Specifically, the second core-pulling mechanism includes a second driving member, a second material-reducing slider, and a second core-pulling rod disposed on the second material-reducing slider. The output end of the second driving member is connected to the second material-reducing slider, and the second driving member is used to drive the second material-reducing slider and the second core-pulling rod to extend into the cavity 300. The third core-pulling mechanism includes a third driving member, a third material-reducing slider, and a third core-pulling rod disposed on the third material-reducing slider. The output end of the third driving member is connected to the third material-reducing slider, and the third driving member is used to drive the third material-reducing slider and the third core-pulling rod to extend into the cavity 300. The second core-pulling rod and the third core-pulling rod are coaxially arranged.

[0049] The second driving component drives the second material reduction slider and the second core-pulling rod to move towards the cavity 300. The third driving component drives the third material reduction slider and the third core-pulling rod to move towards the cavity 300. The minimum distance between the second material reduction slider and the third material reduction slider is the length dimension of both ends of the product 10. The second core-pulling rod and the third core-pulling rod abut against each other and penetrate through the cavity 300, so that a through hole 12 is formed on the product 10.

[0050] Reference Figure 4 or Figure 5 In some embodiments, the first core-pulling mechanism 400, the extrusion mechanism 500, the second core-pulling mechanism 700, and the third core-pulling mechanism 800 are arranged in a cross shape. The first core-pulling rod 430 of the first core-pulling mechanism 400 is used to form the first pre-cast hole 11 of the product 10, and the extrusion pin 530 of the extrusion mechanism 500 is used to form the second pre-cast hole of the product 10. The first core-pulling rod 430 and the extrusion pin 530 are coaxially arranged, such that the first pre-cast hole 11 and the second pre-cast hole are located on both sides of the product 10, and the first pre-cast hole 11 and the second pre-cast hole are coaxial. The second core-pulling rod of the second core-pulling mechanism 700 and the third core-pulling rod of the third core-pulling mechanism 800 are used to form the through hole 12 of the product 10, and the through hole 12 is perpendicular to the first pre-cast hole 11.

[0051] Reference Figures 5 to 7In some embodiments, the extrusion mechanism 500 further includes an extrusion pin sleeve 540, which is disposed on the fixed template 120 or the movable template 220. The extrusion pin sleeve 540 is provided with a first guide hole, through which the extrusion pin 530 passes. The extrusion pin sleeve 540 has the functions of protecting the extrusion pin 530, strengthening the extrusion pin 530, and guiding the extrusion pin 530.

[0052] In some embodiments, the fixed mold base 110 or the moving mold base 210 is provided with a third clearance hole, and the connecting rod 520 passes through the third clearance hole and extends to the outside of the fixed mold base 110 or the moving mold base 210. The connecting rod 520 can move in the third clearance hole in a direction close to or away from the cavity 300.

[0053] Reference Figure 7 The connecting rod 520 has a storage groove 521 on its side wall. The cooling pipe 600 is located in the storage groove 521 and extends to the outside of the fixed mold base 110 or the moving mold base 210, so as to facilitate the connection of the cooling pipe 600 with the cooling equipment. The storage groove 521 of the connecting rod 520 serves to store and protect the cooling pipe 600.

[0054] The cooling pipe 600 includes a first channel and a second channel, which are conveying channels. One end of each channel is located at one end of the cooling pipe 600 and is connected to the cooling flow channel. The other end of each channel is located at the other end of the cooling pipe 600, which is provided with an inlet and an outlet, respectively, which are connected to the other ends of the first and second channels. The first and second channels can be arranged in parallel or coaxially.

[0055] The length direction of the storage groove 521 is parallel to the length direction of the connecting rod 520, and the two ends of the storage groove 521 are respectively opened on the two end faces of the connecting rod 520. The first driving member 410 is connected to the fixed mold base 110 or the moving mold base 210 through the bracket, and the output end of the first driving member 410 is connected to the other end of the cooling pipe 600 through the adapter block.

[0056] Reference Figure 1 , Figure 4 and Figure 5 In some embodiments, the rear steering gear housing mold also includes a sprue sleeve 130, a liquid inlet channel 310 formed between the fixed template 120 and the moving template 220, the liquid inlet channel 310 being connected to the cavity 300, and a sprue channel being formed inside the sprue sleeve 130 that is connected to the liquid inlet channel 310. The sprue channel, the liquid inlet channel 310 and the cavity 300 are connected in sequence. The solution for making the product 10 is injected into the cavity 300 by injecting the solution for making the product 10 into the sprue channel of the sprue sleeve 130.

[0057] In some embodiments, the fixed mold base 110 is provided with a fixed mold limiting groove and a first mounting hole, the fixed mold limiting groove and the first mounting hole are connected, the fixed mold plate 120 is disposed in the fixed mold limiting groove, and the sprue sleeve 130 is disposed in the first mounting hole and abuts against the fixed mold plate 120, so that the sprue channel and the liquid inlet channel 310 can be better connected. The fixed mold limiting groove and the first mounting hole respectively serve to limit the fixed mold base 110 and the sprue sleeve 130.

[0058] Reference Figure 4 or Figure 5 In some embodiments, the rear steering gear housing mold also includes multiple exhaust mechanisms 900, an exhaust channel 320 is formed between the fixed template 120 and the moving template 220, the exhaust channel 320 is connected to the cavity 300, an exhaust chamber is formed in the exhaust mechanism 900 that is connected to the exhaust channel 320, a solution for making product 10 is injected into the cavity 300, and the gas and part of the solution in the cavity 300 can be discharged into the exhaust chamber of the exhaust mechanism 900.

[0059] In some embodiments, the exhaust mechanism 900 includes two interlocking plates, with a longitudinal air passage and a plurality of parallel transverse air passages formed between the two plates. The longitudinal air passage connects the middle of all the transverse air passages and the exhaust passage 320, and the longitudinal air passage and all the transverse air passages form an exhaust chamber.

[0060] In another embodiment, the exhaust mechanism 900 includes two interlocking plates, with a meandering exhaust chamber formed between the two plates. The meandering exhaust chamber is designed to allow for a longer length, which is beneficial for the exhaust chamber to collect gas and some solution, thereby improving the die-casting quality of the product 10.

[0061] In this embodiment, there are three exhaust mechanisms 900. Each exhaust mechanism 900 also includes a vacuum tube, which is connected to a snap-fit ​​plate, with its lumen communicating with the end of an exhaust chamber. The beginning of the exhaust chamber is connected to an exhaust channel 320. The vacuum tube is used to remove air from the cavity 300, the liquid inlet channel 310, the exhaust channel 320, and the exhaust chamber. A valve is provided between the lumen of the vacuum tube and the exhaust chamber. The vacuum tube is connected to a vacuum device, which evacuates the vacuum tube.

[0062] Reference Figure 3In some embodiments, the rear steering gear housing mold also includes a stripper plate 230 and multiple stripper rods disposed on the stripper plate 230. The moving mold base 210 and the moving mold plate 220 are respectively provided with multiple second guide holes and multiple third guide holes. The stripper rods extend into the cavity 300 through the second guide holes and the third guide holes. When the mold is opened, the stripper plate 230 moves towards the cavity 300 carrying the stripper rods. The stripper rods extend into the cavity 300 and drive the product 10 in the cavity 300 to detach from the moving mold plate 220, so as to facilitate the removal of the product 10.

[0063] It is understood that the stripper plate 230 includes two plates connected by fasteners. One end of the stripper rod is provided with a cap, the diameter of which is larger than the diameter of other areas of the stripper rod. One plate is provided with a second mounting hole, which is a stepped hole. The larger end of the second mounting hole is close to the other plate. The cap of the stripper plate 230 is located at the larger end of the second mounting hole, and the other areas of the stripper rod pass through the smaller end of the second mounting hole.

[0064] Of course, the moving mold base 210 is also provided with multiple second guide holes in the areas corresponding to the venting channel 320 and the liquid inlet channel 310, and the moving mold plate 220 is also provided with multiple third guide holes in the areas corresponding to the venting channel 320 and the liquid inlet channel 310.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A rear steering gear housing mold, characterized in that, include: The fixed mold mechanism (100) includes a fixed mold base (110) and a fixed mold plate (120) disposed on the fixed mold base (110). The moving mold mechanism (200) includes a moving mold base (210) and a moving mold plate (220) disposed on the moving mold base (210). A cavity (300) is formed between the fixed mold plate (120) and the moving mold plate (220). The cavity (300) is used for die casting to form a product (10). The first core-pulling mechanism (400) includes a first driving member (410), a first material-reducing slider (420), and a plurality of first core-pulling rods (430) disposed on the first material-reducing slider (420). The output end of the first driving member (410) is connected to the first material-reducing slider (420). The first driving member (410) is used to drive the first material-reducing slider (420) and the first core-pulling rods (430) to extend into the cavity (300) to reduce the wall thickness of the product (10) in the area corresponding to the first material-reducing slider (420) and to form a first pre-cast hole (11). The extrusion mechanism (500) includes an extrusion drive (510), a connecting rod (520), and an extrusion pin (530). The number of extrusion pins (530) is equal to that of the first core-pulling rods (430). One extrusion pin (530) is coaxially arranged with one first core-pulling rod (430). The extrusion drive (510) is connected to the extrusion pin (530) through the connecting rod (520). The extrusion drive (510) is used to drive the extrusion pin (530) to extend into the cavity (300) to press the product (10). The cooling pipe (600) is provided with a cooling channel on the extrusion pin (530). The conveying channel of the cooling pipe (600) is connected to the cooling channel. The conveying channel is used to convey and recover coolant to the cooling channel to cool the extrusion pin (530).

2. The rear steering gear housing mold according to claim 1, characterized in that, It also includes a second core-pulling mechanism (700) and a third core-pulling mechanism (800), the structure of the second core-pulling mechanism (700) and the third core-pulling mechanism (800) are the same as the structure of the first core-pulling mechanism (400), the second core-pulling mechanism (700) and the third core-pulling mechanism (800) are arranged opposite to each other to reduce the wall behind the product (10) in the area corresponding to the second material reduction slider and the area corresponding to the third material reduction slider, and to form a through hole (12) on the product (10).

3. The rear steering gear housing mold according to claim 2, characterized in that, The first core-pulling mechanism (400), the extrusion mechanism (500), the second core-pulling mechanism (700), and the third core-pulling mechanism (800) are arranged in a cross shape.

4. The rear steering gear housing mold according to claim 1, characterized in that, The extrusion mechanism (500) further includes an extrusion pin sleeve (540), which is disposed on the fixed template (120) or the moving template (220). The extrusion pin sleeve (540) is provided with a first guide hole, and the extrusion pin rod (530) passes through the first guide hole.

5. The rear steering gear housing mold according to claim 3 or 4, characterized in that, The fixed mold base (110) or the moving mold base (210) is provided with a third clearance hole. The connecting rod (520) passes through the third clearance hole and extends to the outside of the fixed mold base (110) or the moving mold base (210). The side wall of the connecting rod (520) is provided with a receiving groove (521). The cooling pipe (600) is provided in the receiving groove (521) and extends to the outside of the fixed mold base (110) or the moving mold base (210).

6. The rear steering gear housing mold according to claim 1, characterized in that, It also includes a sprue sleeve (130), a liquid inlet channel (310) is formed between the fixed template (120) and the moving template (220), the liquid inlet channel (310) is connected to the cavity (300), and a sprue passage is formed inside the sprue sleeve (130) that is connected to the liquid inlet channel (310).

7. The rear steering gear housing mold according to claim 6, characterized in that, The fixed mold base (110) is provided with a fixed mold limiting groove and a first mounting hole. The fixed mold limiting groove and the first mounting hole are connected. The fixed mold plate (120) is located in the fixed mold limiting groove. The sprue sleeve (130) is located in the first mounting hole and abuts against the fixed mold plate (120) so that the sprue channel is connected to the liquid inlet channel (310).

8. The rear steering gear housing mold according to claim 1, 6, or 7, characterized in that, It also includes multiple exhaust mechanisms (900), an exhaust channel (320) is formed between the fixed template (120) and the moving template (220), the exhaust channel (320) is connected to the cavity (300), and an exhaust chamber connected to the exhaust channel (320) is formed in the exhaust mechanism (900).

9. The rear steering gear housing mold according to claim 8, characterized in that, The exhaust mechanism (900) includes two interlocking plates, with a longitudinal air passage and a plurality of parallel transverse air passages formed between the two interlocking plates. The longitudinal air passage connects the middle of all the transverse air passages and the exhaust channel (320), and the longitudinal air passage and all the transverse air passages form the exhaust chamber.

10. The rear steering gear housing mold according to claim 1, characterized in that, It also includes a stripper plate (230) and multiple stripper rods provided on the stripper plate (230). The moving mold base (210) and the moving mold plate (220) are respectively provided with multiple second guide holes and multiple third guide holes. The stripper rods extend into the cavity (300) through the second guide holes and the third guide holes to drive the product (10) in the cavity (300) to detach from the moving mold plate (220).

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