Precision casting aluminum alloy tire mold with stepped exhaust grooves

Abstract

The utility model discloses a precision casting aluminum alloy tire mold with stepped exhaust grooves, and particularly relates to the technical field of tire molds, the precision casting aluminum alloy tire mold comprises a lower mold and an upper mold, mold cavities are symmetrically arranged on opposite sides of the lower mold and the upper mold, a heating pipeline is arranged in the middle of the lower mold, and a plurality of first exhaust pipes are arranged in the mold cavity on one side of the upper mold. According to the utility model, the first exhaust pipes which are distributed in a stepped manner are matched with the exhaust material blocking mechanism, so that the exhaust efficiency of the mold is greatly improved, gas in a mold cavity can be quickly and thoroughly exhausted, the defects of air holes, bubbles and the like on the surface of a tire casting are obviously reduced, and the product percent of pass is improved; the appearance quality and the mechanical property of the tire are improved, uniform heating of the mold is achieved through the design of the heating pipeline, it is ensured that a tire casting shrinks uniformly in the solidification process, deformation and size deviation are effectively reduced, and the size precision and the use performance of the tire are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire mould technical field, more specifically, the utility model relates to a kind of stepped exhaust groove's precision casting aluminum alloy tire mould. BACKGROUND

[0002] In tire manufacturing industry, tire mould plays a decisive role to the quality and production efficiency of tire. With the development of automobile industry, the performance requirement of tire is continuously improved, for example, the demand of new energy automobile to tire light weight, low rolling resistance, the rigorous requirement of high-performance sports car to tire grip and wear resistance, which proposes higher challenge to the precision, exhaust performance and other aspects of tire mould, which proposes higher challenge to the precision, exhaust performance and other aspects of tire mould;

[0003] The conventional tire mould mostly adopts simple straight groove type or shallow groove type exhaust structure in exhaust design, which is difficult to realize efficient exhaust when facing a large amount of gas generated in mould cavity during casting process, ordinary exhaust design cannot effectively exhaust a large amount of gas generated in mould cavity during casting process, resulting in defects such as blowhole, bubble on tire casting surface, which seriously affects the appearance quality and mechanical properties of tire, these defects not only reduce the qualified rate of product, increase production cost, but also may affect the safety and durability of tire in actual use, therefore, a kind of stepped exhaust groove's precision casting aluminum alloy tire mould is proposed. SUMMARY

[0004] In order to overcome the above-mentioned defects of prior art, the utility model provides a kind of stepped exhaust groove's precision casting aluminum alloy tire mould to solve the problems proposed in the above background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of stepped exhaust groove's precision casting aluminum alloy tire mould, including lower mould and upper mould, the relative side symmetry of lower mould and upper mould is provided with mould cavity, through mould cavity for forming tire, the middle part of lower mould is provided with heating pipeline, through heating pipeline to facilitate heating use, the inside of upper mould side mould cavity is provided with a plurality of first exhaust pipe, the inner cavity of first exhaust pipe is provided with exhaust cavity, the gas in mould cavity enters exhaust cavity through first exhaust pipe to facilitate exhaust, the periphery of lower mould is fixedly connected with positioning column symmetrically;

[0006] The top of the positioning column is provided with a threaded rod, the top of the threaded rod is fixedly connected with a rotating rod, the middle of the threaded rod is fixedly sleeved with a limiting ring, and the middle of the threaded rod is sleeved with an extrusion plate. By rotating the rotating rod, the threaded rod is rotated into the positioning column, the extrusion plate is gradually moved downward and tightly presses the top of the upper mold, the upper mold and the lower mold are tightly fixed, the mold is prevented from being dislocated during casting, and the molding accuracy of tire patterns and other detail parts is ensured.

[0007] The lower mold is provided with an air inlet pipe and an air outlet pipe on the two sides respectively, the top of the upper mold is provided with a second air exhaust pipe on the two sides symmetrically, and the middle of the first air exhaust pipe is provided with an air exhaust material blocking mechanism.

[0008] Preferably, grooves corresponding to the positioning columns are formed in the periphery of the upper mold, one side of the positioning column is located inside the groove, and the extrusion plate is located on the top of the upper mold.

[0009] Preferably, the threaded rod is threadedly connected with the positioning column, the extrusion plate is located at the bottom of the limiting ring, and the extrusion plate is rotatably connected with the threaded rod.

[0010] Preferably, the inner cavities of the air inlet pipe and the air outlet pipe are respectively connected with the inner cavities of the two ends of the heating pipeline, and the heating pipeline is located around the side mold cavity of the lower mold. The heating medium (such as hot oil or steam) is introduced into the heating pipeline through the air inlet pipe, circulates in the heating pipeline, and then flows out from the air outlet pipe, so as to realize uniform heating of the lower mold, and then make the temperature distribution in the entire mold cavity uniform, ensure that the tire is uniform in the fluidization process, and reduce deformation and size deviation.

[0011] Preferably, the inner cavity of the second air exhaust pipe is connected with the inner cavity of the air exhaust cavity, and the bottom ends of the plurality of first air exhaust pipes are distributed in the inner cavity of the side mold cavity of the upper mold in a stepped manner. During the fluidization process, the gas in the mold cavity first enters the air exhaust cavity of the first air exhaust pipe. Since the first air exhaust pipe is distributed in a stepped manner, the gas can be sequentially discharged from low to high, avoiding the accumulation of gas in the local part. The stepped design increases the length of the exhaust path and the space for gas discharge, so that the gas can be more smoothly discharged from the mold cavity.

[0012] Preferably, the air exhaust material blocking mechanism comprises a mounting pipe fixed in the middle of the first air exhaust pipe, a perforated plate fixedly connected to the inner cavity bottom of the mounting pipe, and a fixed ring fixedly connected to the middle of the mounting pipe.

[0013] Preferably, the middle part of the fixed ring is provided with an exhaust hole, the top of the fixed ring is fixedly connected with a fixed rod, the middle part of the fixed rod is sleeved with a lifting plate, the bottom of the lifting plate is fixedly connected with a blocking column, and the bottom end of the blocking column is inserted into the inside of the exhaust hole and tightly matched with the inner cavity of the exhaust hole.

[0014] Preferably, the top of the fixed rod is fixedly connected with a limiting plate, the middle part of the fixed rod is sleeved with a spring, the spring is arranged between the lifting plate and the limiting plate, the lifting plate is slidably connected with the fixed rod through a sliding block and a sliding groove, the gas enters between the porous plate and the fixed ring through the small holes in the middle part of the porous plate, the blocking column in the middle part of the exhaust hole is pushed upward, the blocking column moves upward, the lifting plate extrudes the spring, at this time, the gas can completely enter the inside of the first exhaust pipe through the exhaust hole and be discharged through the exhaust cavity, and when the outer wall of the tire is tightly matched with the inner cavity wall of the mold cavity, the rubber on the surface of the tire can be prevented from entering the inside of the first exhaust pipe during the tire fluidization process, and the use effect is improved.

[0015] The technical effects and advantages of the utility model are as follows:

[0016] 1. The utility model discloses a first exhaust pipe and an exhaust material blocking mechanism are arranged in a stepped distribution, which greatly improves the exhaust efficiency of the mold, can quickly and completely exhaust the gas in the mold cavity, significantly reduces the defects such as pores and bubbles on the surface of the tire casting, improves the product pass rate, improves the appearance quality and mechanical properties of the tire, and realizes uniform heating of the mold through the design of the heating pipeline, ensures uniform shrinkage of the tire casting during solidification, effectively reduces deformation and size deviation, and improves the size accuracy and use performance of the tire.

[0017] 2. The utility model discloses a positioning column and a groove are arranged, the mold closing of the upper mold and the lower mold can be positioned, the threaded insertion rod is rotated in the positioning column by rotating the driving rod, the extrusion plate gradually moves downward and tightly presses the top of the upper mold, the upper mold and the lower mold are tightly fixed, the mold is prevented from being dislocated during casting, the molding accuracy of the tire pattern and other detail parts is ensured, when the outer wall of the tire is tightly matched with the inner cavity wall of the mold cavity, the rubber on the surface of the tire can be prevented from entering the inside of the first exhaust pipe during the tire fluidization process, and the use effect is improved.

[0018] Through the mutual influence of the above-mentioned multiple effects, the exhaust efficiency of the mold can be improved, the gas in the mold cavity can be quickly and completely exhausted, the defects such as pores and bubbles on the surface of the tire casting can be significantly reduced, the product pass rate can be improved, uniform heating of the mold is realized, and uniform shrinkage of the tire casting during solidification is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model.

[0020] Figure 2 This is a front view cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower mold of this utility model.

[0022] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 5 This is a schematic diagram showing the disassembled structure of the mounting pipe and lifting plate of this utility model.

[0024] The attached diagram is labeled as follows: 1. Lower mold; 2. Upper mold; 3. Mold cavity; 4. Heating pipe; 5. First exhaust pipe; 6. Exhaust chamber; 7. Positioning pin; 8. Threaded insert rod; 9. Actuating rod; 10. Limiting ring; 11. Extrusion plate; 12. Inlet pipe; 13. Outlet pipe; 14. Second exhaust pipe; 15. Mounting pipe; 16. Fixing ring; 17. Perforated plate; 18. Exhaust through hole; 19. Fixing rod; 20. Lifting plate; 21. Sealing pin; 22. Limiting plate; 23. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] As attached Figures 1-5 The precision casting aluminum alloy tire mold with stepped venting groove shown includes a lower mold 1 and an upper mold 2. Mold cavities 3 are symmetrically opened on opposite sides of the lower mold 1 and the upper mold 2. The mold cavities 3 are used to form tires. A heating pipe 4 is opened in the middle of the lower mold 1 for convenient heating. Multiple first venting pipes 5 are opened inside the mold cavity 3 on one side of the upper mold 2. The inner cavity of the first venting pipe 5 is opened into the venting chamber 6. The gas in the mold cavity enters the venting chamber 6 through the first venting pipe 5 for convenient venting. Positioning pins 7 are symmetrically fixedly connected around the lower mold 1.

[0027] A threaded rod 8 is inserted into the top of the positioning post 7. A toggle rod 9 is fixedly connected to the top of the threaded rod 8. A limiting ring 10 is fixedly sleeved in the middle of the threaded rod 8. An extrusion plate 11 is sleeved in the middle of the threaded rod 8. By rotating the toggle rod 9, the threaded rod 8 is screwed into the positioning post 7. The extrusion plate 11 gradually moves downward and presses the top of the upper mold 2, so as to achieve a tight fixation between the upper mold 2 and the lower mold 1, prevent mold misalignment during the casting process, and ensure the forming accuracy of details such as tire tread.

[0028] The lower mold 1 is provided with an air inlet pipe 12 and an air outlet pipe 13 on both sides respectively. The upper mold 2 is provided with a second exhaust pipe 14 symmetrically on both sides of the top. The middle of the first exhaust pipe 5 is provided with an exhaust baffle mechanism to facilitate air intake and exhaust. The exhaust baffle mechanism can facilitate exhaust while preventing rubber material from entering and causing blockage, making it convenient to use.

[0029] As attached Figures 1-3 As shown, the upper mold 2 has grooves around its perimeter corresponding to the positioning pins 7. One side of the positioning pins 7 is located inside the grooves. The extrusion plate 11 is located at the top of the upper mold 2. The threaded rod 8 is threadedly connected to the positioning pins 7. The extrusion plate 11 is located at the bottom of the limiting ring 10. The extrusion plate 11 is rotatably connected to the threaded rod 8. The inner cavities of the air inlet pipe 12 and the air outlet pipe 13 are respectively connected to the two ends of the inner cavity of the heating pipe 4. The heating pipe 4 is located around the perimeter of the mold cavity 3 on one side of the lower mold 1. The inner cavity of the second exhaust pipe 14 is connected to the inner cavity of the exhaust chamber 6. The bottom ends of multiple first exhaust pipes 5 are distributed in a stepped manner inside the mold cavity 3 on one side of the upper mold 2. Through the air inlet... Heating medium such as hot oil or steam is introduced into pipe 12, circulates within heating pipe 4, and then flows out from vent pipe 13, achieving uniform heating of lower mold 1, thereby ensuring uniform temperature distribution throughout the mold cavity, ensuring uniform fluidization of the tire, reducing deformation and dimensional deviation. During fluidization, the gas in the mold cavity first enters the venting chamber 6 of the first vent pipe 5. Since the first vent pipe 5 is stepped, the gas can be discharged sequentially from low to high, avoiding local accumulation of gas. The stepped design increases the length of the venting path and the space for gas discharge, allowing the gas to be discharged from the mold cavity more smoothly.

[0030] As attached Figure 1 , 2As shown in Figures 4 and 5, the exhaust baffle mechanism includes an installation pipe 15 fixed in the middle of the first exhaust pipe 5. A perforated plate 17 is fixedly connected to the bottom of the inner cavity of the installation pipe 15. A fixing ring 16 is fixedly connected to the middle of the installation pipe 15. An exhaust passage hole 18 is opened in the middle of the fixing ring 16. A fixing rod 19 is fixedly connected to the top of the fixing ring 16. A lifting plate 20 is sleeved in the middle of the fixing rod 19. A sealing column 21 is fixedly connected to the bottom of the lifting plate 20. The bottom end of the sealing column 21 is inserted into the interior of the exhaust passage hole 18 and fits tightly against the inner cavity of the exhaust passage hole 18. A limit plate 22 is fixedly connected to the top of the fixing rod 19. A spring 23 is sleeved in the middle of the fixing rod 19. Spring 23 is set between lifting plate 20 and limiting plate 22. Lifting plate 20 and fixed rod 19 are slidably connected by slider and groove. Gas enters between perforated plate 17 and fixed ring 16 through small hole in the middle of perforated plate 17, pushing the sealing column 21 in the middle of exhaust hole 18 upward, so that the sealing column 21 moves upward, thereby controlling the lifting plate 20 to squeeze spring 23. At this time, gas will completely enter the interior of first exhaust pipe 5 through exhaust hole 18 and be discharged through exhaust chamber 6. At the same time, when the outer wall of the tire is tightly attached to the inner wall of mold cavity 3, the rubber on the surface of the tire can be prevented from entering the interior of first exhaust pipe 5 during tire fluidization, thus improving the performance.

[0031] The working principle of this utility model is as follows: When in use, the tire is inflated and placed in the middle of the mold cavity 3. Then, the upper mold 2 is placed on top of the lower mold 1 and positioned by the positioning pin 7 and the groove. Then, the toggle rod 9 is rotated to control the threaded rod 8 to rotate so that the limiting ring 10 presses against the extrusion plate 11, thereby pressing the upper mold 2 and improving the mold closing strength of the upper mold 2 and the lower mold 1.

[0032] When the upper mold 2 presses downward to compress the tire inside the mold cavity 3, the residual gas inside the mold cavity 3 will enter the interior of the exhaust cavity 6 through the middle of multiple mounting pipes 15 via the first exhaust pipe 5 and be discharged through the second exhaust pipe 14, thereby improving the exhaust quality.

[0033] Then, high-temperature gas is injected into the heating pipe 4 through the air inlet pipe 12 to heat and fluidize the tire inside the lower mold 1, thereby improving the performance.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision cast aluminum alloy tire mold of stepped venting channel type comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) and the upper mold (2) are symmetrically provided with a mold cavity (3) on the opposite side, the middle part of the lower mold (1) is provided with a heating pipe (4), the inside of the mold cavity (3) on one side of the upper mold (2) is provided with a plurality of first exhaust pipes (5), the inner cavity of the first exhaust pipe (5) is provided with an exhaust cavity (6), and the periphery of the lower mold (1) is fixedly connected with a positioning column (7); The top of the positioning column (7) is inserted with a threaded plug rod (8), the top of the threaded plug rod (8) is fixedly connected with a poking rod (9), the middle part of the threaded plug rod (8) is fixedly sleeved with a limiting ring (10), and the middle part of the threaded plug rod (8) is sleeved with an extrusion plate (11); The two sides of the lower mold (1) are respectively provided with an air inlet pipe (12) and an air outlet pipe (13), the top of the upper mold (2) is symmetrically provided with a second exhaust pipe (14), and the middle part of the first exhaust pipe (5) is provided with an exhaust material blocking mechanism.

2. A precision die cast aluminum alloy tire mold having stepped vent slots according to claim 1, characterized in that: The periphery of the upper mold (2) is provided with a groove corresponding to the positioning column (7), one side of the positioning column (7) is located in the inside of the groove, and the extrusion plate (11) is located on the top of the upper mold (2).

3. A precision die cast aluminum alloy tire mold having stepped vent slots as defined in claim 1 wherein: The threaded plug rod (8) is threadedly connected with the positioning column (7), the extrusion plate (11) is located at the bottom of the limiting ring (10), and the extrusion plate (11) is rotationally connected with the threaded plug rod (8).

4. A precision die cast aluminum alloy tire mold having stepped vent slots according to claim 1 wherein: The inner cavities of the air inlet pipe (12) and the air outlet pipe (13) are respectively connected with the inner cavities of the two ends of the heating pipe (4), and the heating pipe (4) is located around the mold cavity (3) on one side of the lower mold (1).

5. A precision die cast aluminum alloy tire mold having stepped vent slots according to claim 1 wherein: The inner cavity of the second exhaust pipe (14) is connected with the inner cavity of the exhaust cavity (6), and the bottom ends of the plurality of first exhaust pipes (5) are distributed in the inside of the mold cavity (3) on one side of the upper mold (2) in a stepped manner.

6. A precision die cast aluminum alloy tire mold having stepped vent slots as defined in claim 1 wherein: The exhaust material blocking mechanism comprises a mounting pipe (15) fixedly connected to the middle part of the first exhaust pipe (5), a perforated plate (17) fixedly connected to the inner cavity bottom of the mounting pipe (15), and a fixing ring (16) fixedly connected to the middle part of the mounting pipe (15).

7. A precision die cast aluminum alloy tire mold having stepped vent slots according to claim 6 wherein: The middle part of the fixing ring (16) is provided with an exhaust through hole (18), the top of the fixing ring (16) is fixedly connected with a fixed rod (19), the middle part of the fixed rod (19) is sleeved with a lifting plate (20), the bottom of the lifting plate (20) is fixedly connected with a plugging column (21), the bottom end of the plugging column (21) is inserted into the inside of the exhaust through hole (18) and tightly abuts against the inner cavity of the exhaust through hole (18).

8. A precision die cast aluminum alloy tire mold having stepped vent slots according to claim 7 wherein: The top of the fixed rod (19) is fixedly connected with a limiting plate (22), the middle part of the fixed rod (19) is sleeved with a spring (23), the spring (23) is arranged between the lifting plate (20) and the limiting plate (22), and the lifting plate (20) and the fixed rod (19) are slidably connected through a sliding block and a sliding groove.

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