A casting equipment and process for diesel engine cylinder heads

Abstract

This invention discloses a casting equipment and process for a diesel engine cylinder head, including a mold for forming the diesel engine cylinder head, and an injection pipe and a pushing mechanism for injecting material into the mold. The pushing mechanism includes an outer shell, a secondary extension mechanism, and a slag removal mechanism. A support is provided inside the outer shell. The secondary extension mechanism includes a stepper motor, a second housing, and a third housing disposed inside the outer shell. A first threaded rod is provided at the drive end of the stepper motor. By setting up the secondary extension mechanism and the slag removal mechanism, the pushing mechanism, from the feeding state to the pre-cleaning state, lifts the slag removal mechanism through the secondary extension mechanism, so that the slag removal mechanism cleans the slag, preventing the secondary melting of solid slag in subsequent production processes and the generation of defective products due to insufficient melting, and ensuring the connectivity of the feed inlet.

Description

Technical Field

[0001] This invention relates to the field of cylinder head casting technology, and more particularly to a casting equipment and process for a diesel engine cylinder head. Background Technology

[0002] Diesel engine cylinder heads are generally cast using sand casting, which is cost-effective. Existing casting equipment includes a mold for forming the diesel engine cylinder head and a feeding mechanism for injecting slurry into the mold; see the attached diagram in the manual. Figure 1 and Figure 2 The feeding mechanism consists of an injection pipe, a cylinder, and a feeding cylinder. The injection pipe has a feed port and is connected to the feeding cylinder. The casting material is injected along the feeding cylinder and enters the injection pipe. Then, the casting material is injected into the mold by the cylinder. During the pushing process of the cylinder, the residual casting material in the feeding cylinder will enter the push rod position of the cylinder. Long-term use will cause damage to the cylinder, and a large amount of casting material will accumulate at the cylinder push rod position, affecting the cylinder stroke. To address this, we propose a casting equipment and process for diesel engine cylinder heads. Summary of the Invention

[0003] The purpose of this invention is to reduce the impact of the above-mentioned situation and to provide a casting equipment and process for diesel engine cylinder heads.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a casting equipment for a diesel engine cylinder head, comprising a mold for forming the diesel engine cylinder head, and an injection pipe and a pushing mechanism for injecting material into the mold, wherein the pushing mechanism comprises an outer shell, a secondary extension mechanism and a slag removal mechanism;

[0005] A support frame is provided inside the outer shell.

[0006] The secondary extension mechanism includes a stepper motor, a second housing, and a third housing disposed within the outer casing. The stepper motor drive end is provided with a first threaded rod, and the end face of the first threaded rod is provided with a transmission gear. A connecting seat is threadedly connected to the first threaded rod, and a transmission rod is disposed on the connecting seat. A first bevel gear is disposed on the end face of the transmission rod, and the transmission gear meshes with the transmission rod. A fixing seat is disposed within the third housing, and the fixing seat is threadedly connected to the transmission rod.

[0007] The slag removal mechanism includes a sliding seat that slides inside the third housing. The sliding seat is provided with a gear transmission assembly that meshes with a first bevel gear, and the sliding seat is provided with a second threaded rod that meshes with the gear transmission assembly through a second bevel gear. The second threaded rod is threadedly connected to an internal threaded plate, and an electric grinding disc is provided on the internal threaded plate. A spring for resetting the sliding seat is provided inside the third housing.

[0008] Preferably, the connecting seat is disposed inside the second housing, and the second housing is slidably connected to the bracket.

[0009] Preferably, the transmission rod is provided with intermittent threads, and multiple gear grooves are evenly distributed on the transmission rod.

[0010] Preferably, the injection pipe has a feed inlet, which is positioned to match the electric grinding disc.

[0011] Preferably, the third housing is provided with a baffle that penetrates the outer housing, and the baffle is tightly slidably connected to the injection tube.

[0012] Preferably, the third housing has a key-shaped cross-section and an opening on the third housing for the electric grinding disc to extend out.

[0013] A casting process for a diesel engine cylinder head includes the following steps:

[0014] Step 1, loosening the slag: The third shell extends into the mold through the secondary extension mechanism, and the electric grinding disc is pushed to the feed inlet position by the pushing mechanism to clean the slag at the feed inlet position;

[0015] Step 2, Slag Discharge: The secondary extension mechanism resets, the equipment is in an unloaded state, and the secondary extension mechanism unfolds a second time. The slag that fell into the injection pipe is pushed out by the secondary extension mechanism.

[0016] Step 3, mold groove forming: Form the mold groove at the mold position and lock the two molds;

[0017] Step 4, Injection and Forming: The casting material enters the injection pipe along the inlet and is fed through the secondary extension mechanism. After the product is formed, the secondary extension mechanism is reset.

[0018] Step 5, Demolding: Separate the mold and remove the product.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. By setting up a two-stage extension mechanism and a slag removal mechanism, the pushing mechanism moves from the feeding state to the pre-cleaning state. The two-stage extension mechanism lifts the slag removal mechanism, which cleans the slag and prevents the solid slag from being melted again during subsequent production. Insufficient melting can lead to defective products, and the connection effect of the feed inlet is also ensured.

[0021] 2. The design of the secondary extension mechanism optimizes the traditional feeding mechanism and solves the problem of residual casting material in the feeding cylinder entering the cylinder push rod position, causing cylinder damage and affecting cylinder stroke. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a casting equipment for diesel engine cylinder heads in the prior art;

[0023] Figure 2 This is a schematic diagram of the feeding mechanism of a casting equipment for diesel engine cylinder heads in the prior art;

[0024] Figure 3 This is a cross-sectional structural schematic diagram of a casting equipment and process for a diesel engine cylinder head according to the present invention.

[0025] Figure 4 This is a schematic diagram of the unfolded structure of a casting equipment and process for a diesel engine cylinder head according to the present invention.

[0026] Figure 5 This is a cross-sectional view of the third housing of a casting equipment and process for a diesel engine cylinder head according to the present invention;

[0027] Figure 6 This is a state diagram of the casting equipment and process feeding mechanism for a diesel engine cylinder head according to the present invention;

[0028] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0029] Figure 8 This is a schematic diagram of the casting equipment and process transmission rod for a diesel engine cylinder head according to the present invention.

[0030] In the diagram: 1. Outer shell; 11. Bracket; 2. Stepper motor; 21. First threaded rod; 22. Transmission gear; 3. Second shell; 31. Transmission rod; 3101. Gear groove; 3102. Thread; 32. First bevel gear; 33. Connecting seat; 4. Third shell; 41. Fixed seat; 42. Sliding seat; 43. Gear transmission assembly; 44. Second threaded rod; 45. Internal threaded plate; 46. Electric grinding disc; 47. Spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 3-8 The present invention provides a technical solution: a casting equipment for a diesel engine cylinder head, including a mold for forming the diesel engine cylinder head, and an injection pipe and a pushing mechanism for injecting material into the mold. The pushing mechanism includes an outer shell 1, a secondary extension mechanism and a slag removal mechanism.

[0033] A bracket 11 is provided inside the outer casing 1.

[0034] The secondary extension mechanism includes a stepper motor 2, a second housing 3, and a third housing 4 disposed within the outer housing 1. The stepper motor 2 has a first threaded rod 21 at its drive end, and a transmission gear 22 is disposed on the end face of the first threaded rod 21. A connecting seat 33 is threadedly connected to the first threaded rod 21, and a transmission rod 31 is disposed on the connecting seat 33. A first bevel gear 32 is disposed on the end face of the transmission rod 31, and the transmission gear 22 meshes with the transmission rod 31. A fixing seat 41 is disposed within the third housing 4, and the fixing seat 41 is threadedly connected to the transmission rod 31.

[0035] The slag removal mechanism includes a sliding seat 42 that slides inside the third housing 4. The sliding seat 42 is provided with a gear transmission assembly 43 that meshes with the first bevel gear 32. The sliding seat 42 is also provided with a second threaded rod 44 that meshes with the gear transmission assembly 43 via a second bevel gear. The second threaded rod 44 is threadedly connected to an internal thread plate 45. An electric grinding disc 46 is provided on the internal thread plate 45. A spring 47 for resetting the sliding seat 42 is provided inside the third housing 4.

[0036] The bracket 11 is used to support the first threaded rod 21, and a bearing for the rotation of the first threaded rod 21 is provided at the bracket 11 position to facilitate the rotation of the first threaded rod 21. Similarly, a bearing for the rotation of the transmission rod 31 is also provided at the second housing 3 position.

[0037] See Figure 3 and Figure 4 By starting the stepper motor 2, the first threaded rod 21 is driven to rotate, thereby causing the connecting seat 33 to move along the axis of the first threaded rod 21, which facilitates the sliding of the second housing 3 along the third housing 4. The rotating transmission gear 22 will drive the transmission rod 31 to rotate, that is, the transmission rod 31 rotates along the connecting seat 33. The rotating transmission rod 31 will cause the threaded connection fixing seat 41 to push the third housing 4 to slide. That is, the stepper motor 2 drives the second housing 3 and the third housing 4 to perform a two-stage extension, which facilitates the pushing of castings or the grinding and cleaning of slag.

[0038] See Figure 4-7 In the feeding state, the first bevel gear 32 meshes with the gear transmission assembly 43. During the process from the feeding state to the pre-cleaning state, the first bevel gear 32 drives the second bevel gear to rotate through the gear transmission assembly 43, that is, drives the internal thread plate 45 to rotate through the second threaded rod 44, which in turn drives the electric grinding disc 46 to rise. During the rising process, the electric grinding disc 46 starts and begins to grind the material residue at the feed inlet, loosening the residue and preventing the feed inlet from being blocked. During the reset process, the spring 47 pushes the sliding seat 42, so that the first bevel gear 32 meshes with the gear transmission assembly 43, which facilitates the reset of the electric grinding disc 46 during the rotation.

[0039] See Figure 6The unloading state is the initial working state of the equipment; the feeding state is the working state of the third housing 4 when injecting castings; and the pre-cleaning state is the maximum elongation state of the third housing 4, which ensures that the electric grinding disc 46 is aligned with the feed inlet for easy cleaning. Figure 7 Clean the slag in the feed to ensure efficient flow at the feed inlet.

[0040] The connecting seat 33 is located inside the second housing 3, and the second housing 3 is slidably connected to the bracket 11 to ensure the stability of the horizontal sliding of the second housing 3.

[0041] See Figure 8 The transmission rod 31 is provided with discontinuous threads 3102, and multiple gear grooves 3101 are evenly provided on the transmission rod 31 to define the structure of the transmission rod 31. Its threads 3102 facilitate threaded transmission with the fixed seat 41, and the gear grooves 3101 transmit power with the transmission gear 22.

[0042] The injection pipe has a feed port that matches the electric grinding disc at position 46. During the cooling process, the casting material at the feed port will solidify and clump together. The clumps need to be treated and the feed port needs to be kept clear.

[0043] The third shell 4 is provided with a baffle that penetrates the outer shell 1, and the baffle is tightly slidably connected to the injection pipe. The baffle is used to prevent residual casting material from entering the injection pipe during the injection process.

[0044] The third housing 4 has a key-shaped cross-section, and an opening is provided on the third housing 4 for the electric grinding disc 46 to extend out.

[0045] A casting process for a diesel engine cylinder head includes the following steps:

[0046] Step 1, loosening the slag: The third housing 4 is extended into the mold through the secondary extension mechanism, and the electric grinding disc 46 is pushed to the feed inlet position by the pushing mechanism to clean the slag at the feed inlet position;

[0047] Step 2, Slag Discharge: The secondary extension mechanism resets, the equipment is in an unloaded state, and the secondary extension mechanism unfolds a second time. The slag that fell into the injection pipe is pushed out by the secondary extension mechanism.

[0048] Step 3, mold groove forming: Form the mold groove at the mold position and lock the two molds;

[0049] Step 4, Injection and Forming: The casting material enters the injection pipe along the inlet and is fed through the secondary extension mechanism. After the product is formed, the secondary extension mechanism is reset.

[0050] Step 5, Demolding: Separate the mold and remove the product.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A casting apparatus for a diesel engine cylinder head, comprising a mold for forming the diesel engine cylinder head, and an injection pipe and a pushing mechanism for injecting slurry into the mold, characterized in that, The pushing mechanism includes an outer shell (1), a secondary extension mechanism, and a slag removal mechanism; A bracket (11) is provided inside the outer shell (1); The secondary extension mechanism includes a stepper motor (2), a second housing (3), and a third housing (4) disposed within the outer housing (1). The stepper motor (2) has a first threaded rod (21) at its drive end, and a transmission gear (22) is disposed on the end face of the first threaded rod (21). A connecting seat (33) is threaded onto the first threaded rod (21), and a transmission rod (31) is disposed on the connecting seat (33). A first bevel gear (32) is disposed on the end face of the transmission rod (31), and the transmission gear (22) meshes with the transmission rod (31). A fixed seat (41) is disposed within the third housing (4), and the fixed seat (41) is threadedly connected to the transmission rod (31). The slag removal mechanism includes a sliding seat (42) that slides inside the third housing (4). The sliding seat (42) is provided with a gear transmission assembly (43) that meshes with the first bevel gear (32). The sliding seat (42) is also provided with a second threaded rod (44) that meshes with the gear transmission assembly (43) via a second bevel gear. The second threaded rod (44) is threadedly connected to an internal thread plate (45). An electric grinding disc (46) is provided on the internal thread plate (45). A spring (47) for resetting the sliding seat (42) is provided inside the third housing (4). In the feeding state, the first bevel gear (32) meshes with the gear transmission assembly (43). During the process from the feeding state to the pre-cleaning state, the first bevel gear (32) drives the second bevel gear to rotate through the gear transmission assembly (43), that is, drives the internal thread plate (45) to rotate through the second threaded rod (44), that is, drives the electric grinding disc (46) to rise. During the rising process, the electric grinding disc (46) starts and the grinding disc begins to grind the slag at the feed inlet, loosening the slag and preventing the feed inlet from being blocked. During the reset operation, the sliding seat (42) is pushed by the spring (47) so that the first bevel gear (32) meshes with the gear transmission assembly (43) so that the electric grinding disc (46) can be reset during the rotation. The unloading state is the initial working state of the equipment, the feeding state is the working state of the third shell (4) when the casting is injected, and the pre-cleaning state is the maximum elongation state of the third shell (4), so that the electric grinding disc (46) is aligned with the feed port, so as to clean the slag.

2. The casting equipment for a diesel engine cylinder head according to claim 1, characterized in that: The connecting seat (33) is disposed inside the second housing (3), and the second housing (3) is slidably connected to the bracket (11).

3. The casting equipment for a diesel engine cylinder head according to claim 1, characterized in that: The transmission rod (31) is provided with discontinuous threads (3102), and multiple gear grooves (3101) are evenly provided on the transmission rod (31).

4. The casting equipment for a diesel engine cylinder head according to claim 1, characterized in that: The injection pipe has a feed inlet, which is matched with the position of the electric grinding disc (46).

5. The casting equipment for a diesel engine cylinder head according to claim 1, characterized in that: The third housing (4) is provided with a baffle that penetrates the outer housing (1), and the baffle is tightly slidably connected to the injection pipe.

6. The casting equipment for a diesel engine cylinder head according to claim 1, characterized in that: The third housing (4) has a key-shaped cross section, and an opening is provided on the third housing (4) for the electric grinding disc (46) to extend out.

7. A casting process for a diesel engine cylinder head, implemented using the casting equipment for the diesel engine cylinder head according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1, loosening the slag: the third shell (4) is inserted into the mold through the secondary extension mechanism, and the electric grinding disc (46) is pushed to the feed inlet position by the pushing mechanism, and the slag at the feed inlet position is cleaned; Step 2, Slag Discharge: The secondary extension mechanism resets, the equipment is in an unloaded state, and the secondary extension mechanism unfolds a second time. The slag that fell into the injection pipe is pushed out by the secondary extension mechanism. Step 3, mold groove forming: Form the mold groove at the mold position and lock the two molds; Step 4, Injection and Forming: The casting material enters the injection pipe along the inlet and is fed through the secondary extension mechanism. After the product is formed, the secondary extension mechanism is reset. Step 5, Demolding: Separate the mold and remove the product.

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