Camshaft outer frame mold cavity

Abstract

The utility model provides a camshaft outer frame mould cavity for car relates to the mould technical field of camshaft outer frame for car, including mould body, the one end of mould body is provided with the sprue bush, is established with the main gate in the mould body inside, is provided with a plurality of uniform distribution's cavity body in the mould body inside, a plurality of cavities body all are established with the main gate between the split gate of penetration. In the utility model, when using, the staff passes into the sprue bush with the molten state's metal liquid. After the metal liquid enters the sprue bush, immediately flows into the main gate and then evenly shunts into each split gate, then the metal liquid flows into the cavity body through the split gate, starts to fill the cavity body, through the setting up a plurality of split gates, the improvement of traditional extrusion casting mould one mould one cavity, compared with single internal flow channel's advantage is to make molten metal as possible more evenly delivered to each gate, the liquid that flows into the cavity body is as possible big, flows smoothly, improves the productivity.

Description

Technical Field

[0001] This utility model relates to the field of mold technology for automotive camshaft outer frames, and more particularly to a mold cavity for automotive camshaft outer frames. Background Technology

[0002] The camshaft is an important component in a piston engine. Its function is to control the opening and closing of the valves. Since the valve movement pattern is related to the power and operating characteristics of an engine, the camshaft design plays a very important role in the engine design process.

[0003] In existing technologies, traditional camshaft production primarily involves forging. Forging is a processing method that uses forging machinery to apply pressure to a metal billet, causing it to undergo plastic deformation to obtain a forging with specific mechanical properties, shape, and dimensions. For camshafts, forging requires expensive equipment, necessitating large forging machines and significant upfront investment; production efficiency is relatively low, especially for complex-shaped camshafts, where the forging process is cumbersome; high-quality billets are required, as poor billet quality easily leads to defects in the forgings; and large machining allowances result in material waste and increased production costs. Utility Model Content

[0004] The purpose of this invention is to solve the problems of high equipment cost, large forging equipment, large initial investment, and relatively low production efficiency in the existing technology for forging camshafts. The invention proposes a mold cavity for the outer frame of an automotive camshaft.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mold cavity for an automotive camshaft outer frame, comprising a mold body, a sprue sleeve at one end of the mold body, a main sprue inside the mold body, and multiple evenly distributed cavity bodies inside the mold body, with branch sprues penetrating between the multiple cavity bodies and the main sprue.

[0006] Preferably, the top of the mold body is provided with an exhaust groove, and an overflow groove is provided through the cavity body and the exhaust groove.

[0007] Preferably, the number of the gating channels and the cavity body are both four.

[0008] Preferably, the ingate at the connection between the gating system and the cavity body is a tubular ingate.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] 1. In this invention, during use, the operator introduces molten metal into the sprue bushing. After entering the bushing, the molten metal flows into the main runner and then is evenly distributed into various sub-runners. The molten metal then flows through the sub-runners into the mold cavity, beginning to fill the cavity. By setting multiple sub-runners, this improvement over the traditional one-cavity extrusion casting mold offers the advantage of allowing as much molten metal as possible to be evenly delivered to each gate, maximizing the amount of liquid flowing into the mold cavity, and ensuring smooth flow. This increases productivity while meeting the requirements for casting formability.

[0011] 2. In this utility model, when the molten metal fills the cavity body, the gas and some of the excess molten metal in the cavity body will first flow into the overflow tank. The overflow tank serves to store the excess molten metal and impurities. Subsequently, the gas is discharged from the cavity body through the exhaust tank connected to the overflow tank, ensuring that there is no residual gas inside the cavity body that affects the product quality. Attached Figure Description

[0012] Figure 1 This utility model provides an overall three-dimensional view of the cavity of a camshaft outer frame mold for automobiles.

[0013] Illustration: 1. Mold body; 2. Main runner; 3. Sub-runner; 4. Cavity body; 5. Overflow groove; 6. Venting groove; 7. Sprue bushing. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Example 1, as Figure 1 As shown, this utility model provides a mold cavity for an automotive camshaft outer frame, including a mold body 1, a sprue sleeve 7 at one end of the mold body 1, a main sprue 2 inside the mold body 1, and multiple evenly distributed cavity bodies 4 inside the mold body 1, with branch sprues 3 passing through the main sprue 2 between the multiple cavity bodies 4 and the main sprue 2.

[0017] The overall effect of Embodiment 1 is that, during use, the operator introduces molten metal into the sprue sleeve 7. After entering the sprue sleeve 7, the molten metal flows into the main runner 2 and then is evenly distributed into each branch runner 3. The molten metal then flows through the branch runners 3 into the mold cavity body 4, beginning to fill the mold cavity body 4. By setting multiple branch runners 3, this improvement over the traditional one-cavity extrusion casting mold offers the advantage of allowing as much molten metal as possible to be evenly delivered to each sprue, maximizing the amount of liquid flowing into the mold cavity body 4, and ensuring smooth flow. This increases productivity while meeting the requirements for casting formability.

[0018] Example 2, as Figure 1 As shown, furthermore, the top of the mold body 1 is provided with an exhaust groove 6, and multiple cavity bodies 4 are provided with overflow grooves 5 through the exhaust groove 6.

[0019] Furthermore, there are four gating channels 3 and four cavity bodies 4.

[0020] Furthermore, the ingate at the connection between the gating system 3 and the cavity body 4 adopts a tubular ingate. This design combines the annular structural characteristics of the part with the filling capacity of the casting, and fully considers the shape characteristics and forming capacity of the part, thereby obtaining a high-performance, high-quality casting.

[0021] The effect achieved by the entire embodiment 2 is that when the molten metal fills the cavity body 4, the gas in the cavity body 4 and some of the excess molten metal will first flow into the overflow tank 5. The overflow tank 5 serves to store the excess molten metal and impurities. Subsequently, the gas is discharged from the cavity body 4 through the exhaust tank 6 connected to the overflow tank 5, ensuring that there is no residual gas inside the cavity body 4 that affects the product quality.

[0022] Working Principle: During operation, the operator introduces molten metal into the sprue bushing 7. The sprue bushing 7 serves as the entry point for the molten metal into the mold, guiding and initially constraining the flow direction of the molten metal. After entering the sprue bushing 7, the molten metal flows into the main runner 2 and then is evenly distributed into the various branch runners 3. The design of multiple branch runners 3 ensures that the molten metal is delivered to each gate as evenly as possible, thereby guaranteeing a large flow rate and smooth flow of the molten metal into the cavity body 4. The molten metal flows into the cavity body 4 through the branch runners 3, beginning to fill the cavity body 4 and gradually forming the shape of the automotive camshaft outer frame. As the molten metal fills the cavity body 4, the gas and some excess molten metal in the cavity body 4 first flow into the overflow groove 5. The overflow groove 5 serves to store excess molten metal and impurities. Subsequently, the gas is discharged from the cavity body 4 through the venting groove 6 connected to the overflow groove 5, ensuring that there is no residual gas inside the cavity body 4 affecting product quality. After the product cools to a suitable temperature, the mold is opened, and the formed camshaft outer frame is removed. This design employs a multi-sprue system (3), which, compared to a single internal runner, allows for the most even distribution of molten metal to each gate, maximizing the amount of liquid flowing into the mold cavity (4) and ensuring smooth flow. This improves productivity while meeting the requirements for casting formability.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A mold cavity for an automotive camshaft outer frame, comprising a mold body (1), characterized in that: The mold body (1) is provided with a sprue sleeve (7) at one end. The mold body (1) is provided with a main sprue (2) inside. The mold body (1) is provided with multiple evenly distributed cavity bodies (4) inside. Each cavity body (4) is provided with a branch sprue (3) through the main sprue (2).

2. The automotive camshaft outer frame mold cavity according to claim 1, characterized in that: The top of the mold body (1) is provided with an exhaust groove (6), and an overflow groove (5) is provided between the multiple cavity bodies (4) and the exhaust groove (6).

3. The automotive camshaft outer frame mold cavity according to claim 2, characterized in that: The number of the gating channels (3) and the cavity body (4) are both four.

4. The automotive camshaft outer frame mold cavity according to claim 1, characterized in that: The inlet gate at the connection between the gating channel (3) and the cavity body (4) is a tubular inlet gate.

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