A shell mold

Abstract

The utility model discloses a shell mould, including fixed die mechanism, movable die mechanism, first core -pulling mechanism and second core -pulling mechanism, fixed die mechanism includes fixed die base and fixed die plate, movable die mechanism includes movable die base and movable die plate, and the fixed die plate and movable die plate form the cavity between, and the cavity is used for forming product, and the fixed die plate and movable die plate are equipped with first sealing element between, first core -pulling mechanism's first material reducing sliding block and first core -pulling rod are used for extending into the cavity, and the second core -pulling mechanism's second material reducing sliding block and second core -pulling rod are used for extending into the cavity, and first core -pulling rod and second core -pulling rod abut, to make product form through -hole, and first material reducing sliding block and fixed die plate, movable die plate are equipped with second sealing element between, and second material reducing sliding block and fixed die plate, movable die plate are equipped with third sealing element between. First sealing element, second sealing element and third sealing element can make the leakproofness of cavity get the guarantee, guarantee the reliability and life of shell mould, and improve the quality of die casting product.

Description

Technical Field

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

[0002] For metal products requiring high structural strength, die casting technology is typically used. The molds used in die casting have a significant impact on product quality, therefore, the requirements for the molds are also high. These molds usually employ hydraulic power and cooling water, and the requirements for preventing water and oil leaks are also stringent. Steering gear housings are produced using molds. These housings have relatively thick walls, through-holes at both ends, connection holes or mounting holes, and side holes communicating with the through-holes. For products die-cast from aluminum alloys or other metal materials, the shrinkage characteristics of the metal make them prone to internal defects and mold thermal spikes during the die casting process. After a certain period of use, the mold's sealing performance deteriorates. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a shell mold with good sealing performance.

[0004] A shell mold according to an embodiment of the present invention includes a fixed mold mechanism, a movable mold mechanism, a first core-pulling mechanism, and a second core-pulling mechanism. The fixed mold mechanism includes a fixed mold base and a fixed template disposed on the fixed mold base. The movable mold mechanism includes a movable mold base and a movable template disposed on the movable mold base. A cavity is formed between the fixed template and the movable template for forming a product. A first sealing member is provided between the fixed template and the movable template. The first core-pulling mechanism includes a first driving member, a first material-reducing slider, and a first core-pulling rod disposed on the first material-reducing slider. The output end of the first driving member is connected to the first material-reducing slider. The first material-reducing slider and the first core-pulling rod are used to drive the first material-reducing slider and the first core-pulling rod to extend into the cavity; 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. The second driving member is used to drive the second material-reducing slider and the second core-pulling rod to extend into the cavity, and the first core-pulling rod abuts against the second core-pulling rod to form a through hole in the product; a second sealing member is provided between the first material-reducing slider and the fixed template and the moving template, and a third sealing member is provided between the second material-reducing slider and the fixed template and the moving template.

[0005] It has at least the following beneficial effects: When the outer shell mold is closed, the cavity formed by the fixed mold plate and the moving mold plate, as well as the first core-pulling rod and the second core-pulling rod passing through the cavity, are used to form the product, giving the product the required shape and through holes. The first seal, the second seal, and the third seal ensure the sealing performance of the cavity, guaranteeing the reliability and service life of the outer shell mold, and improving the quality of the die-cast product.

[0006] According to some embodiments of this utility model, a third core-pulling mechanism is also included. The third core-pulling mechanism includes a third driving member, a third material-reducing slider connected to the output end of the third driving member, a fourth driving member disposed on the third material-reducing slider, and a plurality of third core-pulling rods all connected to the output end of the fourth driving member. The third driving member is used to drive the third material-reducing slider to extend into the cavity to reduce the wall thickness of the product in the area corresponding to the third material-reducing slider. The fourth driving member is used to drive all the third core-pulling rods to extend into the cavity so that the product forms a connecting hole in the area corresponding to the third core-pulling rod.

[0007] According to some embodiments of the present invention, a fourth sealing element is provided between the third material reduction slider and the fixed template and the moving template.

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

[0009] According to some embodiments of the present invention, the two opposite end faces of the first core-pulling rod and the second core-pulling rod are respectively provided with positioning grooves and positioning posts, and the positioning posts can extend into the positioning grooves.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the product structure according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure 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 structural diagram of the present invention after concealing the fixed mold base and the moving mold base; Figure 5 This is a structural diagram of the present invention with the fixed mold mechanism, moving mold base, first driving member, second driving member, and third driving member concealed. Figure 6 for Figure 5 A magnified view of a portion of point A in the middle; Figure 7 This is a schematic diagram of the structure of the first core-pulling mechanism, the second core-pulling mechanism, and the third core-pulling mechanism according to an embodiment of the present utility model; Icon labels: Product 10, through hole 11, connecting hole 12; Fixed mold mechanism 100, fixed mold base 110, fixed mold plate 120, sprue bushing 130; Moving mold mechanism 200, moving mold base 210, moving mold plate 220, stripper plate 230; Cavity 300, liquid inlet channel 310, exhaust channel 320; The third core-pulling mechanism 400, the third driving component 410, the third material-reducing slider 420, the third core-pulling rod 430, the fourth driving component 440, and the fourth sealing component 450; First seal 500; Exhaust mechanism 600; The components include: a first core-pulling mechanism 700, a first driving component 710, a first material-reducing slider 720, a first core-pulling rod 730, and a second sealing component 740. The components include a second core-pulling mechanism 800, a second driving component 810, a second material-reducing slider 820, a second core-pulling rod 830, and a third sealing component 840. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Reference Figure 1 It is known that the product 10 has through holes 11 penetrating both ends of the product 10, and the outer wall of the product 10 has several connecting holes 12, the axis of the connecting holes 12 being perpendicular to the axis of the through holes 11.

[0021] Reference Figures 2 to 7This utility model discloses a shell mold, including a fixed mold mechanism 100, a moving mold mechanism 200, a first sealing element 500, a first core-pulling mechanism 700, and a second core-pulling mechanism 800. The fixed mold mechanism 100 includes a fixed mold base 110 and a fixed mold template 120, and the moving mold mechanism 200 includes a moving mold base 210 and a moving mold template 220. The fixed mold base 110 and the moving mold base 210 are respectively provided with a fixed mold limiting groove and a moving mold limiting groove on their facing sides. 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. One of the fixed mold base 110 and the moving mold base 210 is provided with a plurality of guide pillars, and the other is provided with a plurality of guide sleeves. The plurality of guide pillars are respectively inserted into the plurality of guide sleeves, and the guide pillars and guide sleeves play the role of guiding the moving direction of the moving mold base 210. When the fixed mold base 110 and the moving mold base 210 approach each other, that is, when the fixed mold mechanism 100 and the moving mold mechanism 200 close, the fixed mold plate 120 and the moving mold plate 220 abut against each other, and a cavity 300 is formed between the fixed mold plate 120 and the moving mold plate 220. The inner wall of the forming cavity 300 matches the shape of the product 10. The cavity 300 is used for die casting to form the product 10.

[0022] Reference Figures 3 to 7 The first core-pulling mechanism 700 includes a first driving member 710, a first material-reducing slider 720, and a first core-pulling rod 730 disposed on the first material-reducing slider 720. The output end of the first driving member 710 is connected to the first material-reducing slider 720. The first driving member 710 is used to drive the first material-reducing slider 720 and the first core-pulling rod 730 into the cavity 300. The second core-pulling mechanism 800 includes a second driving member 810, a second material-reducing slider 820, and a second core-pulling rod 830 disposed on the second material-reducing slider 820. The output end of the second driving member 810 is connected to the second material-reducing slider 820. The second driving member 810 is used to drive the second material-reducing slider 820 and the second core-pulling rod 830 into the cavity 300, and the first material-reducing slider 720 abuts against the second core-pulling rod 830 to form a through hole 11 in the product 10.

[0023] When die-casting product 10, the fixed mold mechanism 100 and the moving mold mechanism 200 are closed. The first driving member 710 drives the first material-reducing slider 720 and the first core-pulling rod 730 to move towards the cavity 300, so that the first material-reducing slider 720 and the first core-pulling rod 730 extend into the cavity 300. The second driving member 810 drives the second material-reducing slider 820 and the second core-pulling rod 830 to move towards the cavity 300, so that the second material-reducing slider 820 and the second core-pulling rod 830 extend into the cavity 300. The cavity 300 is formed by the first core-pulling rod 730 and the second core-pulling rod 830 abutting and penetrating the cavity 300. Then, a solution for making product 10, such as aluminum alloy solution or other metal solution, is injected into the cavity 300. The solution solidifies to form product 10 in the cavity 300. The distance between the first material-reducing slider 720 and the second material-reducing slider 820 is the size of the two ends of product 10. Through holes 11 are formed in product 10 at the corresponding positions of the first core-pulling rod 730 and the second core-pulling rod 830.

[0024] It is understandable that the first core-pulling mechanism 700 and the second core-pulling mechanism 800 have the same structure, the first core-pulling mechanism 700 and the second core-pulling mechanism 800 are arranged opposite to each other, and the first core-pulling rod 730 and the second core-pulling rod 830 are on the same straight line.

[0025] Reference Figures 4 to 6 A first sealing element 500 is provided between the fixed template 120 and the moving template 220. A second sealing element 740 is provided between the first material reduction slider 720 and the fixed template 120 and the moving template 220. A third sealing element 840 is provided between the second material reduction slider 820 and the fixed template 120 and the moving template 220. When the outer shell mold is closed, the sealing performance of the cavity 300 can be guaranteed, ensuring the reliability and service life of the outer shell mold, and improving the quality of the die-cast product 10.

[0026] The fixed mold mechanism 100 and the moving mold mechanism 200 can be distributed along the front-back or left-right directions, and the moving direction of the moving mold mechanism 200 is parallel to the horizontal plane.

[0027] Reference Figure 2 , Figure 4 , Figure 5 and Figure 7In some embodiments, the outer shell mold further includes a third core-pulling mechanism 400, which includes a third driving member 410, a third material-reducing slider 420, a fourth driving member 440, and a plurality of third core-pulling rods 430. The output end of the third driving member 410 is connected to the third material-reducing slider 420, and the fourth driving member 440 is disposed on the third material-reducing slider 420. The output end of the fourth driving member 440 is connected to all the third core-pulling rods 430. The third driving member 410 is used to drive the third material-reducing slider 420 and the plurality of third core-pulling rods 430 to extend into the cavity 300, and the fourth driving member 440 is used to drive all the third core-pulling rods 430 to further extend into the cavity 300.

[0028] When the outer shell mold is closed, the third driving member 410 drives the third reducing slider 420 to move into the cavity 300. The third reducing slider 420 can reduce the wall thickness of the product 10 in the area corresponding to the third reducing slider 420. When the solution for making the product 10 is in a semi-solid state, the fourth driving member 440 drives all the third core-pulling rods 430 to extend further into the cavity 300. The third core-pulling rods 430 squeeze the solution in the semi-solid state, which can reduce the inward shrinkage of the product 10 in the area near the connecting hole 12 and improve the quality of the product 10.

[0029] The first core-pulling mechanism 700 also includes a first bracket, and the first driving member 710 is connected to the fixed mold base 110 or the moving mold base 210 through the first bracket. A first guide hole is formed between the fixed mold base 110 and the moving mold base 210, and the first material-reducing slider 720 passes through the first guide hole.

[0030] Similarly, the second core-pulling mechanism 800 also includes a second bracket, and the second driving member 810 is connected to the fixed mold base 110 or the moving mold base 210 through the second bracket. A second guide hole is formed between the fixed mold base 110 and the moving mold base 210, and the second material-reducing slider 820 passes through the second guide hole. The third core-pulling mechanism 400 also includes a third bracket, and the third driving member 410 is connected to the fixed mold base 110 or the moving mold base 210 through the third bracket. A third guide hole is formed between the fixed mold base 110 and the moving mold base 210, and the third material-reducing slider 420 passes through the third guide hole.

[0031] In some embodiments, a fourth sealing element 450 is provided between the third material reduction slider 420 and the fixed template 120 and the moving template 220, and the fourth sealing element 450 can ensure the sealing of the cavity 300.

[0032] The first driving component 710, the second driving component 810, the third driving component 410, and the fourth driving component 440 can all be hydraulic cylinders or pneumatic cylinders. The first sealing component 500, the second sealing component 740, the third sealing component 840, and the fourth sealing component 450 are all made of high-temperature resistant materials. Limiting grooves are provided on the opposing sides of the fixed template 120 and the moving template 220, and these limiting grooves are adapted to the first sealing component 500, the second sealing component 740, the third sealing component 840, and the fourth sealing component 450.

[0033] Reference Figure 2 , Figure 4 and Figure 7 In some embodiments, the third core-pulling mechanism 400, the first core-pulling mechanism 700, and the second core-pulling mechanism 800 all have a length direction, and the third core-pulling mechanism 400, the first core-pulling mechanism 700, and the second core-pulling mechanism 800 are arranged in a T-shape, which facilitates the arrangement of the third core-pulling mechanism 400, the first core-pulling mechanism 700, and the second core-pulling mechanism 800 on the fixed mold mechanism 100 and the moving mold mechanism 200.

[0034] It is understandable that the third core-pulling rod 430 moves in the up-down direction, and the third guide hole is located below the cavity 300. When the third core-pulling rod 430 is working, it moves from bottom to top, which can prevent external hydraulic oil and cooling water from falling into the cavity 300 through the third guide hole.

[0035] The driving directions of the first driving member 710 and the second driving member 810 are parallel to each other. The first core-pulling rod 730 and the second core-pulling rod 830 are on the same straight line, and the first core-pulling rod 730 and the second core-pulling rod 830 can move closer to each other and further away from each other. The driving directions of the third driving member 410 and the fourth driving member 440 are parallel to each other, and the driving direction of the third driving member 410 is perpendicular to the driving direction of the first driving member 710.

[0036] A first sensor is connected to the output end of the first drive unit 710 or the first material reduction slider 720. The first sensor is used to detect the moving position of the output end of the first drive unit 710 or the first material reduction slider 720, thereby ensuring the moving accuracy of the first material reduction slider 720. A second sensor is connected to the output end of the second drive unit 810 or the second material reduction slider 820. The second sensor is used to detect the moving position of the output end of the second drive unit 810 or the second material reduction slider 820, thereby ensuring the moving accuracy of the second material reduction slider 820. A third sensor is connected to the output end of the third drive unit 410 or the third material reduction slider 420. The third sensor is used to detect the moving position of the output end of the third drive unit 410 or the third material reduction slider 420, thereby ensuring the moving accuracy of the third material reduction slider 420.

[0037] Reference Figure 2In some embodiments, the two opposite end faces of the first core-pulling rod 730 and the second core-pulling rod 830 are respectively provided with positioning grooves and positioning posts. The positioning posts can extend into the positioning grooves. When the first core-pulling rod 730 and the second core-pulling rod 830 both move towards the cavity 300, the first core-pulling rod 730 and the second core-pulling rod 830 approach each other. The positioning posts extend into or are inserted into the positioning grooves, which can ensure the accuracy of the position of the first core-pulling rod 730 and the second core-pulling rod 830 in the cavity 300, and can make the two opposite end faces of the first core-pulling rod 730 and the second core-pulling rod 830 fit more tightly.

[0038] The first core-pulling rod 730, the second core-pulling rod 830, and the third core-pulling rod 430 are all hollow structures. Circulating cooling water is introduced into the interior of the first core-pulling rod 730, the second core-pulling rod 830, and the third core-pulling rod 430 to accelerate the cooling of the solution and protect the first core-pulling rod 730, the second core-pulling rod 830, and the third core-pulling rod 430 themselves.

[0039] Reference Figure 2 , Figure 4 and Figure 5 In some embodiments, the outer shell mold further 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, a sprue sleeve 130 is formed inside which a sprue channel is connected to the liquid inlet channel 310, the sprue channel, the liquid inlet channel 310 and the cavity 300 are connected in sequence, and 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.

[0040] 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.

[0041] Reference Figure 4 or Figure 5 In some embodiments, a shell mold further includes multiple venting mechanisms 600, an venting channel 320 is formed between the fixed template 120 and the moving template 220, the venting channel 320 is connected to the cavity 300, and an venting chamber is formed in the venting mechanism 600 that is connected to the venting channel 320. A solution for making the 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 venting chamber of the venting mechanism 600.

[0042] In some embodiments, the venting mechanism 600 includes two interlocking plates, with a meandering venting cavity formed between the two plates. The meandering venting cavity is designed to be longer, which is beneficial for the venting cavity to contain gas and part of the solution, thereby improving the die-casting quality of the product 10.

[0043] In another embodiment, the exhaust chamber includes a longitudinal air passage and a plurality of parallel transverse air passages, the longitudinal air passages connecting the middle of all the transverse air passages and the exhaust passage 320.

[0044] In this embodiment, there are two exhaust mechanisms 600. Each exhaust mechanism 600 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.

[0045] Reference Figure 3 In some embodiments, a shell mold further 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 fourth guide holes and multiple fifth guide holes, which are arranged in a one-to-one correspondence. The stripper rods extend into the cavity 300 through the fourth guide holes and the fifth 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.

[0046] Understandably, the moving mold base 210 also has multiple fourth guide holes in the areas corresponding to the venting channel 320 and the liquid inlet channel 310, and the moving mold plate 220 also has multiple fifth guide holes in the areas corresponding to the venting channel 320 and the liquid inlet channel 310. A stripper rod is inserted into all the fourth and fifth guide holes. The stripper plate 230 comprises two plates connected by fasteners. One end of the stripper rod has a cap, the diameter of which is larger than the diameter of other areas of the stripper rod. One plate has 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 plate 230 are inserted through the smaller end of the second mounting hole.

[0047] 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.

[0048] 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 shell 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 to form a product (10). A first sealing element (500) is provided between the fixed mold plate (120) and the moving mold plate (220). The first core-pulling mechanism (700) includes a first driving member (710), a first material-reducing slider (720), and a first core-pulling rod (730) disposed on the first material-reducing slider (720). The output end of the first driving member (710) is connected to the first material-reducing slider (720), and the first driving member (710) is used to drive the first material-reducing slider (720) and the first core-pulling rod (730) to extend into the cavity (300). The second core-pulling mechanism (800) includes a second driving member (810), a second material-reducing slider (820), and a second core-pulling rod (830) disposed on the second material-reducing slider (820). The output end of the second driving member (810) is connected to the second material-reducing slider (820). The second driving member (810) is used to drive the second material-reducing slider (820) and the second core-pulling rod (830) to extend into the cavity (300), and the first core-pulling rod (730) abuts against the second core-pulling rod (830) to form a through hole (11) in the product (10). A second sealing element (740) is provided between the first material reduction slider (720) and the fixed template (120) and the moving template (220), and a third sealing element (840) is provided between the second material reduction slider (820) and the fixed template (120) and the moving template (220).

2. The outer shell mold according to claim 1, characterized in that, It also includes a third core-pulling mechanism (400), which includes a third driving member (410), a third material-reducing slider (420) connected to the output end of the third driving member (410), a fourth driving member (440) disposed on the third material-reducing slider (420), and a plurality of third core-pulling rods (430) all connected to the output end of the fourth driving member (440). The third driving member (410) is used to drive the third material-reducing slider (420) to extend into the cavity (300) to reduce the wall thickness of the product (10) in the area corresponding to the third material-reducing slider (420). The fourth driving member (440) is used to drive all the third core-pulling rods (430) to extend into the cavity (300) so that the product (10) forms a connecting hole (12) in the area corresponding to the third core-pulling rod (430).

3. The outer shell mold according to claim 2, characterized in that, A fourth sealing element (450) is provided between the third material reduction slider (420), the fixed template (120), and the moving template (220).

4. The outer shell mold according to claim 2, characterized in that, The third core-pulling mechanism (400), the first core-pulling mechanism (700), and the second core-pulling mechanism (800) are arranged in a T-shape.

5. A shell mold according to claim 1, characterized in that, The first core-pulling rod (730) and the second core-pulling rod (830) have positioning grooves and positioning posts on their opposite end faces, respectively, and the positioning posts can extend into the positioning grooves.

6. A shell 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. A shell 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. A shell mold according to claim 1, characterized in that, It also includes multiple exhaust mechanisms (600), 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 is formed in the exhaust mechanism (600) that is connected to the exhaust channel (320).

9. A shell mold according to claim 8, characterized in that, The exhaust mechanism (600) 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. A shell 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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