Engine cylinder head die-casting process and die

Abstract

The invention relates to the technical field of dies, in particular to an engine cylinder head die-casting process and a die, the die comprises a fixed die part, a movable die part and a middle die, the middle die is located between the fixed die part and the movable die part, a lateral movable die is arranged in the middle die, and the lateral movable die can conduct die opening and closing movement; the engine cylinder head die-casting cavity is formed through cooperation of the fixed die component, the movable die component, the middle die and the lateral movable die and used for die-casting forming of an engine cylinder head. The die-casting die for the engine cylinder head is suitable for die-casting production of the engine cylinder head, compared with a traditional pouring technology, the produced engine cylinder head is smooth in surface and high in size precision, and the production efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, in particular to a die-casting process and a mold for an engine cylinder head. Background Art

[0002] The engine cylinder head, also called the cylinder cover, is an important component of the engine. It is installed on the top of the engine block and seals the upper mouth of the cylinder like a lid. Together with the cylinder block, piston, etc., it forms a sealed space to ensure that when the engine is working, the high-temperature and high-pressure gas in the combustion chamber will not leak, and the combustion process is carried out in a sealed environment. In the production of modern engine cylinder heads, die-casting, especially low-pressure die-casting and cold-chamber die-casting, is the mainstream process for aluminum alloy cylinder heads. However, traditional die-casting molds have problems such as low precision and imperfect mold opening and zoning in actual use, which affects production efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a die-casting process and a die for an engine cylinder head, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a die-casting mold for an engine cylinder head, comprising a fixed mold component, a movable mold component and an intermediate mold, wherein the intermediate mold is located between the fixed mold component and the movable mold component, and a lateral movable mold is provided in the intermediate mold, which can move to open and close the mold. The fixed mold component, the movable mold component, the intermediate mold and the lateral movable mold cooperate to form an engine cylinder head die-casting cavity for die-casting the engine cylinder head; a pushing slide is fixedly installed on one side of the lateral movable mold, and the pushing slide can slide in the intermediate mold, and the lateral movable mold is driven to open and close the mold by the pushing slide.

[0005] A T-shaped push groove is provided on the surface of the push slide, and a boss clamping column is provided in the T-shaped push groove. The boss clamping column is clamped in the T-shaped push groove. The axial movement of the boss clamping column drives the push slide to move, thereby causing the lateral movable mold to move.

[0006] A cylinder shaft is coaxially fixedly mounted on one end of the boss clamping column, a cylinder fixing plate is fixedly provided on the surface of the middle mold, a cylinder assembly is fixedly mounted on the cylinder fixing plate, and the cylinder assembly is used to drive the cylinder shaft to move axially.

[0007] A synchronization vertical plate is fixedly provided on the surface of the cylinder shaft, and a detection synchronization shaft is fixedly installed on the synchronization vertical plate. When the cylinder shaft moves axially, the cylinder shaft can drive the detection synchronization shaft to move axially through the synchronization vertical plate. By detecting the position of the detection synchronization shaft, the position detection of the cylinder shaft and the lateral movable mold can be realized.

[0008] A fixed back plate is fixedly installed on the outside of the oil cylinder assembly, a positioning sleeve is fixedly installed on the fixed back plate, the detection synchronization shaft passes through the positioning sleeve, and the detection synchronization shaft is limited by the positioning sleeve.

[0009] A convex ring portion is fixedly provided on the surface of the detection synchronization shaft, and a contact switch is fixedly provided on the surface of the fixed back plate. When the detection synchronization shaft undergoes axial displacement, detection can be achieved through the contact switch, thereby determining the position of the lateral movable mold that moves synchronously with the detection synchronization shaft.

[0010] The contact switch is provided with a switch detection shaft, and a contact wheel is rotatably installed on the end of the switch detection shaft. When the detection synchronization shaft moves axially, the convex ring part is driven to move axially, and the convex ring part is squeezed with the contact wheel, driving the switch detection shaft to move relative to the contact switch, thereby realizing the trigger detection of the contact switch.

[0011] The fixed mold component is provided with a main runner bushing, through which molten metal is input into the engine cylinder head die-casting cavity formed by the fixed mold component, the movable mold component, the intermediate mold and the lateral movable mold; the movable mold component is fixedly mounted with a guide column component, which is inserted in the intermediate mold to position the intermediate mold.

[0012] The intermediate mold is also provided with an intake mandrel, an exhaust mandrel and a mandrel oil cylinder. The intake mandrel and the exhaust mandrel cooperate with the die-casting cavity of the engine cylinder head to form the intake port and the exhaust port of the engine cylinder head respectively. The mandrel oil cylinder is used to control the movement of the intake mandrel and the exhaust mandrel.

[0013] A die-casting process for an engine cylinder head uses an engine cylinder head die-casting mold. The process specifically includes the following steps:

[0014] Step 1: Control the fixed mold component, the movable mold component, the middle mold and the lateral movable mold to cooperate and close the mold to form the engine cylinder head die-casting cavity;

[0015] Step 2: injecting molten metal into the die-cast cavity of the engine cylinder head;

[0016] Step 3: After cooling, control the lateral movable mold to move backward, and pull out the air inlet mandrel and the exhaust mandrel, and open the mold in sequence.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The engine cylinder head die-casting mold of the present invention is suitable for the die-casting production of engine cylinder heads. Compared with traditional casting technology, the engine cylinder heads produced have a smooth surface and high dimensional accuracy, and can improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the interior of the intermediate mold of the present invention.

[0022] In the figure: 1. Fixed mold component; 2. Moving mold component; 3. Intermediate mold; 4. Lateral movable mold; 5. Push slide; 501. T-shaped push groove; 502. Boss clamping column; 503. Cylinder shaft; 504. Cylinder fixing plate; 505. Cylinder assembly; 506. Synchronous vertical plate; 507. Detection synchronization shaft; 508. Fixed back plate; 509. Positioning sleeve; 510. Convex ring; 511. Contact switch; 512. Switch detection shaft; 513. Contact wheel; 101. Main channel bushing; 201. Guide column component; 301. Inlet mandrel; 302. Exhaust mandrel; 303. Mandrel cylinder. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 3 The present invention provides a technical solution: a die-casting mold for an engine cylinder head, comprising a fixed mold component 1, a movable mold component 2 and an intermediate mold 3, wherein the intermediate mold 3 is located between the fixed mold component 1 and the movable mold component 2, and a lateral movable mold 4 is provided in the intermediate mold 3, which can move to open and close the mold. The fixed mold component 1, the movable mold component 2, the intermediate mold 3 and the lateral movable mold 4 cooperate to form an engine cylinder head die-casting cavity for die-casting the engine cylinder head; a pushing slide 5 is fixedly installed on one side of the lateral movable mold 4, which can slide in the intermediate mold 3, and drive the lateral movable mold 4 to open and close the mold by pushing the slide 5. At the same time, it is necessary to detect the position of the lateral movable mold 4 to determine whether it has moved in place under the corresponding state.

[0025] like Figure 3 As shown in the figure, a T-shaped pushing groove 501 is provided on the surface of the pushing slide 5, and a boss clamping column 502 is provided in the T-shaped pushing groove 501. The boss clamping column 502 is clamped in the T-shaped pushing groove 501. The axial movement of the boss clamping column 502 drives the pushing slide 5 to move, and then the lateral movable mold 4 moves.

[0026] like Figure 2 As shown in , a cylinder shaft 503 is coaxially fixedly mounted on one end of the boss column 502, a cylinder fixing plate 504 is fixedly mounted on the surface of the middle mold 3, and a cylinder assembly 505 is fixedly mounted on the cylinder fixing plate 504. The cylinder assembly 505 is used to drive the cylinder shaft 503 to move axially. A synchronization vertical plate 506 is fixedly mounted on the surface of the cylinder shaft 503, and a detection synchronization shaft 507 is fixedly mounted on the synchronization vertical plate 506. When the cylinder shaft 503 moves axially, the cylinder shaft 503 can drive the detection synchronization shaft 507 to move axially through the synchronization vertical plate 506. By detecting the position of the detection synchronization shaft 507, the position detection of the cylinder shaft 503 and the lateral movable mold 4 can be achieved.

[0027] A fixed backplate 508 is fixedly mounted on the exterior of the cylinder assembly 505. A positioning sleeve 509 is fixedly mounted on the fixed backplate 508. The detection synchronization shaft 507 passes through the positioning sleeve 509, which limits the detection synchronization shaft 507. A convex ring 510 is fixedly mounted on the surface of the detection synchronization shaft 507, and a contact switch 511 is fixedly mounted on the surface of the fixed backplate 508. When the detection synchronization shaft 507 undergoes axial displacement, the contact switch 511 can detect it, thereby determining the position of the lateral movable mold 4, which moves synchronously with the detection synchronization shaft 507.

[0028] A switch detection shaft 512 is provided on the contact switch 511, and a contact wheel 513 is rotatably installed on the end of the switch detection shaft 512. When the detection synchronization shaft 507 moves axially, the convex ring portion 510 is driven to move axially. The convex ring portion 510 is squeezed with the contact wheel 513, driving the switch detection shaft 512 to move relative to the contact switch 511, thereby realizing the trigger detection of the contact switch 511.

[0029] A main runner bushing 101 is provided on the fixed mold part 1, through which molten metal is input into the engine cylinder head die-casting cavity formed by the fixed mold part 1, the movable mold part 2, the intermediate mold 3 and the lateral movable mold 4; a guide column part 201 is fixedly installed on the movable mold part 2, and the guide column part 201 is inserted in the intermediate mold 3 to position the intermediate mold 3.

[0030] The intermediate mold 3 is also provided with an intake mandrel 301, an exhaust mandrel 302, and a mandrel oil cylinder 303. The intake mandrel 301 and the exhaust mandrel 302 cooperate with the die-casting cavity of the engine cylinder head to form the intake and exhaust ports of the engine cylinder head, respectively. The mandrel oil cylinder 303 is used to control the movement of the intake mandrel 301 and the exhaust mandrel 302. During the die-casting process, the intake mandrel 301 and the exhaust mandrel 302 are inserted into the die-casting cavity of the engine cylinder head to form the intake and exhaust ports of the engine cylinder head, preventing the molten metal from blocking the intake and exhaust ports. When the mold is opened, the mandrel oil cylinder 303 drives and withdraws the corresponding intake mandrel 301 and exhaust mandrel 302.

[0031] A die-casting process for an engine cylinder head uses an engine cylinder head die-casting mold. The process specifically includes the following steps:

[0032] Step 1: Control the fixed mold part 1, the movable mold part 2, the middle mold 3 and the lateral movable mold 4 to cooperate and close the mold to form the engine cylinder head die-casting cavity;

[0033] Step 2: injecting molten metal into the die-cast cavity of the engine cylinder head;

[0034] Step 3: After cooling, control the lateral movable mold 4 to move backward, and extract the air inlet mandrel 301 and the exhaust mandrel 302, and open the mold in sequence.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for an engine cylinder head, comprising a fixed mold part (1), a movable mold part (2) and an intermediate mold (3), characterized in that: The intermediate mold (3) is located between the fixed mold component (1) and the movable mold component (2); a lateral movable mold (4) is provided in the intermediate mold (3); the lateral movable mold (4) can move to open and close the mold; and an engine cylinder head die-casting cavity is formed by the cooperation of the fixed mold component (1), the movable mold component (2), the intermediate mold (3) and the lateral movable mold (4), so as to perform die-casting on the engine cylinder head; a push slide (5) is fixedly installed on one side of the lateral movable mold (4); the push slide (5) can slide in the intermediate mold (3); and the push slide (5) drives the lateral movable mold (4) to move to open and close the mold.

2. The die-casting mold for an engine cylinder head according to claim 1, characterized in that: A T-shaped pushing groove (501) is provided on the surface of the pushing slide (5), and a boss clamping column (502) is provided in the T-shaped pushing groove (501). The boss clamping column (502) is clamped in the T-shaped pushing groove (501). The axial movement of the boss clamping column (502) drives the pushing slide (5) to move, thereby causing the lateral movable mold (4) to move.

3. The die-casting mold for an engine cylinder head according to claim 2, characterized in that: One end of the boss clamping column (502) is coaxially fixedly mounted with a cylinder shaft (503); a surface of the intermediate mold (3) is fixedly provided with a cylinder fixing plate (504); a cylinder assembly (505) is fixedly mounted on the cylinder fixing plate (504); and the cylinder assembly (505) is used to drive the cylinder shaft (503) to move axially.

4. The die-casting mold for an engine cylinder head according to claim 3, characterized in that: A synchronous vertical plate (506) is fixedly provided on the surface of the oil cylinder shaft (503), and a detection synchronous shaft (507) is fixedly installed on the synchronous vertical plate (506). When the oil cylinder shaft (503) moves axially, the oil cylinder shaft (503) can drive the detection synchronous shaft (507) to move axially through the synchronous vertical plate (506). By detecting the position of the detection synchronous shaft (507), the position detection of the oil cylinder shaft (503) and the lateral movable mold (4) is achieved.

5. The die-casting mold for an engine cylinder head according to claim 4, characterized in that: A fixed back plate (508) is fixedly installed on the outside of the oil cylinder assembly (505), a positioning sleeve (509) is fixedly installed on the fixed back plate (508), the detection synchronization shaft (507) is inserted through the positioning sleeve (509), and the detection synchronization shaft (507) is limited by the positioning sleeve (509).

6. The die-casting mold for an engine cylinder head according to claim 5, characterized in that: A convex ring portion (510) is fixedly provided on the surface of the detection synchronization shaft (507), and a contact switch (511) is fixedly provided on the surface of the fixed back plate (508). When the detection synchronization shaft (507) undergoes axial displacement, detection can be achieved through the contact switch (511), thereby determining the position of the lateral movable mold (4) that moves synchronously with the detection synchronization shaft (507).

7. The die-casting mold for an engine cylinder head according to claim 6, characterized in that: The contact switch (511) is provided with a switch detection shaft (512), and a contact wheel (513) is rotatably mounted on the end of the switch detection shaft (512). When the detection synchronization shaft (507) moves axially, the convex ring portion (510) is driven to move axially. The convex ring portion (510) is squeezed with the contact wheel (513), driving the switch detection shaft (512) to move relative to the contact switch (511), thereby realizing trigger detection of the contact switch (511).

8. The die-casting mold for an engine cylinder head according to claim 1, characterized in that: The fixed mold component (1) is provided with a main runner bushing (101), through which molten metal is input into a die-casting cavity of an engine cylinder head formed by the cooperation of the fixed mold component (1), the movable mold component (2), the intermediate mold (3) and the lateral movable mold (4); a guide column component (201) is fixedly mounted on the movable mold component (2), and the guide column component (201) is inserted into the intermediate mold (3) to position the intermediate mold (3).

9. The die-casting mold for an engine cylinder head according to claim 1, characterized in that: The intermediate mold (3) is further provided with an air intake mandrel (301), an exhaust mandrel (302) and a mandrel oil cylinder (303). The air intake mandrel (301) and the exhaust mandrel (302) cooperate with the die-casting cavity of the engine cylinder head to form the air intake port and the exhaust port of the engine cylinder head respectively. The mandrel oil cylinder (303) is used to control the movement of the air intake mandrel (301) and the exhaust mandrel (302).

10. A die-casting process for an engine cylinder head, using the die-casting mold for an engine cylinder head according to any one of claims 1 to 9, the process comprising the following steps: Step 1: Control the fixed mold component (1), the movable mold component (2), the middle mold (3) and the lateral movable mold (4) to cooperate and close the mold to form a die-casting cavity of the engine cylinder head; Step 2: injecting molten metal into the die-cast cavity of the engine cylinder head; Step 3: After cooling, control the lateral movable mold (4) to move backward, and extract the air intake mandrel (301) and the exhaust mandrel (302), and open the mold in sequence.

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