Novel annular casting mold

Abstract

The utility model discloses a novel annular casting mold which comprises a mold body, the mold body comprises a movable mold and a fixed mold, annular cavities are formed in the movable mold and the fixed mold, and a peripheral water cooling loop is arranged at the position, close to the annular cavities, of the movable mold and / or the fixed mold; the mold body further comprises an exhaust block communicated with the annular cavity, and the exhaust block comprises a movable mold exhaust block and a fixed mold exhaust block which are detachably embedded with each other; and after the movable mold and the fixed mold are closed, a gap between the movable mold exhaust block and the fixed mold exhaust block forms a coherent exhaust channel, and the gap of the exhaust channel is gradually reduced from the feed port to the exhaust port. In the die-casting process, the overall temperature of the die can be parallel through the water cooling loop, and unevenness caused by local temperature difference of a die surface is avoided; gas in the mold is discharged through the exhaust block, molten aluminum slag is discharged, pressure relief and cooling solidification are achieved, exhaust blockage is avoided, flying and flashing of castings are effectively controlled, the precision of the castings is improved, and the quality of the castings is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a novel annular casting mold. Background Art

[0002] When die-casting common circular ring castings, slag pockets are usually arranged in a circle around the outer periphery of the annular cavity of the mold to ensure the forming of the whole circle and the internal quality. However, due to the manufacturing precision (tolerance) of the mold and the wear during the use of the mold, local flash will be generated on the parting surface, and the flash sticking to the mold surface will cause the local flash to be thick, ultimately affecting the local wall thickness of the product (that is, the thickness of the part edge affected by the flash thickness);

[0003] Moreover, during the cooling process of the casting, if the cooling water circuit is not reasonably designed, it will directly affect the temperature balance of the mold, resulting in unevenness of the mold surface due to local temperature differences, and also causing the generation of flash. The flash will affect the quality of the casting and require precision machining in the subsequent process to ensure the product quality. Especially for the manufacturing of high-precision castings such as intelligent robots, the impact is more obvious.

[0004] Therefore, to solve the above problems, it is necessary to develop a novel annular casting mold. By reasonably setting the water cooling circuit and the exhaust block, the flash and burr of the casting can be effectively controlled, the casting precision can be improved, and the casting quality can be ensured. Summary of the Utility Model

[0005] To solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A novel annular casting mold includes a mold body. It is characterized in that the mold body includes a moving mold and a fixed mold. An annular cavity is arranged on the moving mold and the fixed mold. An outer peripheral water cooling circuit is arranged at a position on the moving mold and / or the fixed mold close to the annular cavity;

[0007] The mold body further includes an exhaust block communicated with the annular cavity. The exhaust block includes a moving mold exhaust block and a fixed mold exhaust block that can be detachably fitted with each other. The moving mold exhaust block and the fixed mold exhaust block are respectively fixed on the moving mold and the fixed mold;

[0008] After the moving mold and the fixed mold are closed, the gap between the moving mold exhaust block and the fixed mold exhaust block forms a continuous exhaust channel, and the gap of the exhaust channel gradually decreases from the material inlet to the exhaust port.

[0009] Preferably, the outer peripheral water cooling circuit is rectangular, and the center of the outer peripheral water cooling circuit coincides with the center of the annular cavity; the side length of the outer peripheral cold water circuit is 70% - 90% of the diameter of the annular cavity.

[0010] Preferably, a central water cooling circuit is arranged at the fixed mold near the gate.

[0011] Preferably, convex teeth are provided on the moving die exhaust block, and concave teeth meshing with the convex teeth are provided on the fixed die exhaust block;

[0012] After the moving die exhaust block and the fixed die exhaust block are closed, the gap between the convex teeth and the concave teeth forms the exhaust passage.

[0013] Preferably, both the convex teeth and the concave teeth are in the shape of rack-like structures. The rack includes several continuously connected concave and convex tooth-shaped structures, and the concave teeth are arranged corresponding to and meshing with the convex teeth.

[0014] Preferably, the exhaust direction of the exhaust passage is wavy.

[0015] Preferably, two or more exhaust blocks are provided.

[0016] Preferably, the inlet gap of the exhaust passage is 2-5 mm, and the exhaust gap is 60-80% of the inlet gap.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] Through the reasonable setting of the water cooling circuit and the exhaust block, the present utility model can, during the die-casting process, balance the overall temperature of the die through the water cooling circuit, avoiding unevenness caused by local temperature differences on the die surface; at the same time, through the exhaust block, the gas inside the die is discharged, and the aluminum liquid slag is discharged, the pressure is relieved, and cooling and solidification are achieved, avoiding exhaust blockage; thereby effectively controlling the flashing and burrs of the casting, improving the casting accuracy, and ensuring the casting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural view of the moving die and the fixed die in the present utility model;

[0020] Figure 2 is a schematic cross-sectional structural view of the exhaust block in the present utility model;

[0021] Wherein the moving die 1, the fixed die 2, the peripheral water cooling circuit 3, the exhaust block 4, the central water cooling circuit 5, the annular cavity 10, the exhaust passage 20, the cooling pipe 30, the moving die exhaust block 41, the fixed die exhaust block 42, the convex teeth 1a, and the concave teeth 2a. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear" and similar expressions used herein are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used herein in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Next, in combination with the accompanying drawings and specific embodiments, this utility model will be further described:

[0026] As Figure 1 、 2 shown, a new type of ring-shaped casting mold includes a mold body, and the mold body includes a moving mold 1 and a fixed mold 2. A ring-shaped cavity 10 is provided on the moving mold 1 and the fixed mold 2, and a peripheral water cooling circuit 3 is provided at a position where the moving mold 1 and / or the fixed mold 2 is close to the ring-shaped cavity.

[0027] It further includes an exhaust block 4 communicated with the ring-shaped cavity 10. The exhaust block 4 includes a moving mold exhaust block 41 and a fixed mold exhaust block 42 that can be detachably fitted to each other. The moving mold exhaust block 41 and the fixed mold exhaust block 42 are respectively fixed to the moving mold 1 and the fixed mold 2.

[0028] After the moving mold 1 and the fixed mold 2 are closed, a continuous exhaust passage 20 is formed by the gap between the moving mold exhaust block 41 and the fixed mold exhaust block 42, and the gap of the exhaust passage 20 gradually decreases from the feed port to the exhaust port.

[0029] In this embodiment, by providing a peripheral water cooling circuit 3 on the ring-shaped cavity 10, cooling pipes 30 are respectively provided at the water inlet and outlet of the peripheral water cooling circuit 3, and cooling water is introduced into the peripheral water cooling circuit 3 through the water cooling pipes to balance the overall temperature of the mold and avoid unevenness caused by local temperature difference on the mold surface, resulting in flash; at the same time, by providing an exhaust block 4 with an exhaust passage 20 having a gradually decreasing gap and a wavy shape, compared with the structure of the equal-spacing exhaust block 4 in the prior art, while ensuring the discharge of gas inside the mold and the discharge, pressure relief and cooling and solidification of aluminum liquid slag, exhaust blockage is effectively avoided; therefore, by reasonably setting the peripheral water cooling circuit 3 and the exhaust block 4, the flash and burr of the casting are effectively controlled, the casting accuracy is improved, and the casting quality is guaranteed.

[0030] Further, as Figure 1 shown, in order to improve the cooling effect, effectively control the temperature of the casting, and control the mold temperature in parallel; the peripheral water cooling circuit is rectangular, and the center of the peripheral water cooling circuit 3 coincides with the center of the annular cavity; the side length of the peripheral cold water circuit 3 is 70% - 90% of the diameter of the annular cavity.

[0031] Further, as Figure 1 shown, a central water cooling circuit 5 is provided near the gate of the fixed mold 2.

[0032] In this embodiment, cooling pipes 30 are respectively arranged at the water inlet and outlet of the central water cooling circuit 5, and cooling water is introduced into the peripheral water cooling circuit 3 through the water cooling pipes. Under the action of the central water cooling circuit 5 and the peripheral water cooling circuit 3, the mold temperature balance can be more effectively controlled, thereby avoiding unevenness caused by local temperature difference on the mold surface and resulting in flash generation.

[0033] Further, as Figure 2 shown, in order to ensure the stable formation of the exhaust passage 20 during each mold closing and guarantee the exhaust and slag discharging effects; a convex tooth 1a is provided on the moving mold exhaust block 41, and a concave tooth 2a meshing with the convex tooth 1a is provided on the fixed mold exhaust block 42. After the moving mold exhaust block 41 and the fixed mold exhaust block 42 are closed, the gap between the convex tooth 1a and the concave tooth 2a forms the exhaust passage 20.

[0034] Further, as Figure 2 shown, a plurality of the convex teeth 1a and the concave teeth 2a are provided and are all in the shape of rack-like structures. The rack includes several continuously connected concave and convex tooth-shaped structures, and the concave teeth 2a are correspondingly meshed with the convex teeth 1a.

[0035] In this embodiment, the above structure can prevent the molten aluminum from filling up all at once and blocking the entire exhaust passage 20, and improve the exhaust and slag discharging effects.

[0036] Further, as Figure 2 shown, in order to improve the exhaust and slag discharging effects and avoid exhaust blockage; the exhaust direction of the exhaust passage 20 is wavy.

[0037] Further, two or more exhaust blocks are provided.

[0038] Further, the inlet gap of the exhaust passage 20 is 2 - 5 mm, and the exhaust gap is 60 - 80% of the inlet gap.

[0039] In this embodiment, the gap between the convex tooth 1a and the concave tooth 2a near the feeding port is 2.68 mm, and the gap between the convex tooth 1a and the concave tooth 2a near the exhaust hole is 1.88 mm.

[0040] Working principle: After the casting equipment is installed on the mold, the mold is preheated with an open-flame torch. Through the mold-closing function of the equipment, the moving mold 2 and the fixed mold 2 can be closed, and the mold is in a ready-to-work state. At this time, the water-cooling pipe is already filled with cooling water to even out the overall temperature of the mold. The molten aluminum enters from the center into the runner and quickly fills when it reaches the blank position. Finally, the molten aluminum and slag are respectively concentrated at the position of the exhaust block 4, and the gas is discharged while the molten aluminum and slag solidify. Then, the water-cooling pipe continuously supplies cooling water, and the blank is filled and formed. The molten aluminum is depressurized and slag-discharged through the exhaust block 4, effectively controlling the flying materials and flash. Then, the mold is opened to take out the casting, and the manipulator takes out the casting and places it at a designated preset safe position. The whole mold completes one cycle of work and produces one casting.

[0041] For those skilled in the art, various corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all such changes and deformations should fall within the protection scope of the claims of this utility model patent.

Claims

1. A new type of annular casting mold, including a mold body, characterized in that: The mold body comprises a movable mold and a fixed mold, an annular cavity is arranged on the movable mold and the fixed mold, and a peripheral water cooling circuit is arranged at a position of the movable mold and / or the fixed mold near the annular cavity; The mold body also includes an exhaust block connected to the annular cavity, the exhaust block includes a movable mold exhaust block and a fixed mold exhaust block that are separably engaged with each other, and the movable mold exhaust block and the fixed mold exhaust block are respectively fixed to the movable mold and the fixed mold; After the movable mold and the fixed mold are closed, the gap between the movable mold exhaust block and the fixed mold exhaust block forms a continuous exhaust channel, and the gap of the exhaust channel gradually decreases from the feed inlet to the exhaust outlet.

2. A new type of annular casting mold according to claim 1, characterized in that: The peripheral water cooling loop is rectangular, and the center of the peripheral water cooling loop coincides with the center of the annular cavity; the side length of the peripheral water cooling loop is 70% to 90% of the diameter of the annular cavity.

3. A new type of annular casting mold according to claim 1, characterized in that: The fixed mold is provided with a central water cooling circuit near the gate.

4. A novel annular casting mold according to claim 1, characterized in that: The movable mold exhaust block is provided with convex teeth, and the fixed mold exhaust block is provided with concave teeth meshing with the convex teeth; After the movable mold exhaust block and the fixed mold exhaust block are molded together, the gap between the convex teeth and the concave teeth forms the exhaust channel.

5. A novel annular casting mold according to claim 4, characterized in that: The convex teeth and the concave teeth are both in the form of rack-shaped structures. The rack includes a plurality of mutually continuous concave and convex tooth-shaped structures. The concave teeth are correspondingly meshed with the convex teeth.

6. A novel annular casting mold according to claim 1, characterized in that: The exhaust direction of the exhaust passage is wave-shaped.

7. A novel annular casting mold according to claim 1, characterized in that: The exhaust blocks are provided with two or more.

8. A novel annular casting mold according to claim 1, characterized in that: The air inlet clearance of the exhaust channel is 2-5 mm, and the exhaust port clearance is 60-80% of the air inlet clearance.

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