A dry sand nozzle sand leakage prevention automatic plugging device

Abstract

The utility model discloses a dry state sand shoots sand leakage prevention automatic plugging device, including sand shooting board, a plurality of shoots are fixedly arranged on sand shooting board, sand shooting board top is provided with sand baffle, sand baffle is fixedly connected sand baffle column, sand baffle top is fixedly connected jacks, and jacks lower extreme extends to the downside of sand shooting board, and the upside of sand shooting board is fixedly provided with reset rod, and spring connection sand baffle is seted up on reset rod, and sand baffle is pressed under the action of spring force and makes sand baffle column to press tightly the sand outlet of shoot, and when shooting, the upside of upper core box abuts against the lower extreme of jacks, makes sand baffle and sand baffle column synchronous up -and -down open the sand outlet of shoot. The device utilizes jacks and upper core box linkage control sand baffle's lifting action, and sand baffle column falls back automatically after shooting, and tightly closes shoot, prevents sand from continuing to leak effectively, improves the on -the -spot cleanliness and equipment life.

Description

Technical Field

[0001] This utility model belongs to the field of casting core-making technology, and specifically relates to an automatic sealing device for preventing sand leakage from a dry sand nozzle. Background Technology

[0002] In the casting process of diesel engine cylinder blocks, the hot core box process is widely used in the manufacture of sand cores with complex shapes and high dimensional requirements. Especially under the trend of lightweighting, the water jacket structure in the engine cylinder block and cylinder head exhibits complex geometric features such as thin walls, elongated shapes, and curves, which places higher demands on the consistency and strength of the sand cores. To ensure the compact formation of slender sand cores, dry coated sand is currently widely used for core making. This type of core sand has advantages such as good fluidity and excellent forming effect. However, in the actual sand shooting process, continuous sand leakage from the nozzle often occurs after sand shooting. Such sand leakage not only wastes core sand resources, but may also lead to contamination of the sand shooting area, accelerated equipment wear, and even problems such as surface deformation, dimensional deviations, and insufficient strength of the sand core before the next mold closing, thereby affecting the overall pass rate of the sand cores and increasing the scrap rate of castings and production costs.

[0003] Traditional sealing methods suffer from problems such as cumbersome operation, poor repeatability, incomplete sealing, and susceptibility to damage after long-term use, making it difficult to meet the demands of modern production that requires automation, high efficiency, and repetitive operations. Therefore, there is an urgent need for an automatic sealing device for dry sand nozzles that can work automatically in conjunction with the sand-shooting process, has a simple structure, and provides reliable sealing, in order to improve core-making efficiency and product stability. Utility Model Content

[0004] To solve the technical problem of sand leakage from the nozzle after dry sand injection, this utility model provides an automatic sealing device for preventing sand leakage from dry sand nozzles.

[0005] The technical solution adopted by this utility model is an automatic sealing device for preventing sand leakage in dry sand nozzles, including a sand-shooting plate, a plurality of nozzles fixedly installed on the sand-shooting plate, a sand-blocking plate installed above the sand-shooting plate, a sand-blocking column fixedly connected to the sand-blocking plate, a top column fixedly connected to the sand-blocking plate, the lower end of the top column extending through to the lower side of the sand-shooting plate, a reset rod fixedly installed on the upper side of the sand-shooting plate, a spring connected to the sand-blocking plate on the reset rod, the sand-blocking plate is pressed down by the spring force to make the sand-blocking column press against the sand outlet of the nozzle, during sand shooting, the upper side of the upper core box abuts against the lower end of the top column, so that the sand-blocking plate and the sand-blocking column move upward synchronously to open the sand outlet of the nozzle.

[0006] Furthermore, a stop is provided at the upper end of the reset rod extending outward, and a spring is sleeved in the reset rod, with the upper and lower ends respectively abutting against the stop and the sand baffle.

[0007] Furthermore, a stop is provided at the lower end of the top column, and the top column abuts against the upper side of the upper core box through the stop. The upper end of the stop can abut against the lower side of the sand-shooting plate.

[0008] Furthermore, the nozzles are arranged in a ring around the sand-shooting plate, and the sand-blocking plates are strip-shaped plates arranged circumferentially corresponding to the nozzle positions.

[0009] Furthermore, the reset rod is located at the four corners of the sand baffle.

[0010] Furthermore, the top columns are symmetrically arranged on both sides of the center of the sand baffle, and the upper end of the top column is fixed with a connecting plate, and the two ends of the connecting plate are fixedly connected to the two sides of the sand baffle.

[0011] Furthermore, the lower end of the sand-blocking column is a conical head, which contacts the sand outlet surface of the nozzle.

[0012] This utility model provides an automatic sealing device for preventing sand leakage from a dry sand nozzle. By integrating a top column, a spring reset mechanism, and a liftable sand baffle plate and sand baffle column, it achieves the following significant beneficial effects:

[0013] 1. It can automatically seal the nozzle to prevent sand leakage. The device uses the linkage between the top column and the upper core box to control the lifting and lowering of the sand baffle. After the sand is shot, the sand baffle automatically falls back, tightly sealing the nozzle and effectively preventing sand from continuing to leak, thus improving the cleanliness of the site and the service life of the equipment.

[0014] 2. The device has a simple structure, stable operation, and strong adaptability. The device is compact in design and achieves automatic switching between closing and opening through spring reset and mechanical top column control. No additional pneumatic or electric system is required, making it easy to integrate into the existing sand-shooting machine structure and adapting to nozzle arrangements of different sizes and layouts.

[0015] 3. It can improve the level of automation in core making, save labor costs, and, in conjunction with the automatic linkage of the upper and lower core boxes, shorten the overall core making cycle time, reduce labor intensity, and meet the requirements of modern, high-cycle production lines. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a front sectional view of the present invention.

[0018] In the diagram: 1. Upper core box; 2. Nozzle; 3. Sand baffle column; 4. Sand baffle plate; 5. Reset rod; 6. Spring; 7. Top column; 8. Connecting plate; 9. Sand injection plate. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed description of an automatic sealing device for preventing sand leakage from a dry sand nozzle.

[0020] like Figure 1 and Figure 2As shown, an automatic sealing device for preventing sand leakage from dry sand nozzles includes a sand-shooting plate 9, on which several nozzles 2 are fixedly installed. A sand-blocking plate 4 is installed above the sand-shooting plate 9, and a sand-blocking column 3 is fixedly connected to the sand-blocking plate 4. A top column 7 is fixedly connected to the sand-blocking plate 4, with the lower end of the top column 7 extending through to the lower side of the sand-shooting plate 9. A reset rod 5 is fixedly installed on the upper side of the sand-shooting plate 9, and a spring 6 is installed on the reset rod 5 to connect to the sand-blocking plate 4. The sand-blocking plate 4 is pressed down by the spring force, causing the sand-blocking column 3 to press against the sand outlet of the nozzle 2. During sand shooting, the upper side of the upper core box 1 abuts against the lower end of the top column 7, causing the sand-blocking plate 4 and the sand-blocking column 3 to move upward synchronously and open the sand outlet of the nozzle 2.

[0021] In this embodiment, the lower end of the sand-blocking column 3 is a conical head, which contacts the sand outlet surface of the nozzle 2, thereby ensuring a tight seal.

[0022] The nozzle 2 is arranged in a ring around the sand-shooting plate 9, and the sand-blocking plate 4 is a strip plate arranged circumferentially around the nozzle position. The reset rod 5 is set at the four corners of the sand-blocking plate 4. The upper end of the reset rod 5 extends outward and is provided with a stop. The spring 6 is sleeved in the reset rod 5, and the upper and lower ends abut against the stop and the sand-blocking plate 4, respectively. The top column 7 is symmetrically arranged on both sides of the center of the sand-blocking plate 4. The upper end of the top column 7 is fixed to the connecting plate 8, and the two ends of the connecting plate 8 are fixed to the two sides of the sand-blocking plate 4. The lower end of the top column 7 is provided with a stop block. The top column 7 abuts against the upper side of the upper core box 1 through the stop block. The upper end of the stop block can abut against the lower side of the sand-shooting plate 9.

[0023] During sand injection, the upper core box 1 moves upward to the stop block at the lower end of the top column 7. The top column 7 drives the sand baffle plate 4 and the sand baffle column 3 to rise together, opening the gap between the sand baffle column 3 and the nozzle 2, and sand injection begins. At this time, the spring 6 on the reset rod 5 is under force. After sand injection, the upper core box 1 moves downward, and the sand baffle plate 4 moves downward under the action of the elastic force of the spring 6 and the pressure of the sand in the sand hopper. At this time, the gap between the sand baffle column 3 and the nozzle 2 is zero, blocking the sand and preventing it from flowing out.

[0024] This device effectively solves the long-standing technical problem of sand leakage from the nozzle after dry sand injection, improves the continuity, stability and product qualification rate of the core-making process, and has broad industrial application prospects.

[0025] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An automatic sealing device for preventing sand leakage from a dry sand nozzle, characterized in that, The system includes a sand-shooting plate (9), several nozzles (2) are fixedly installed on the sand-shooting plate (9), a sand-blocking plate (4) is installed above the sand-shooting plate (9), a sand-blocking column (3) is fixedly connected to the sand-blocking plate (4), a top column (7) is fixedly connected to the sand-blocking plate (4), the lower end of the top column (7) extends through to the lower side of the sand-shooting plate (9), a reset rod (5) is fixedly installed on the upper side of the sand-shooting plate (9), a spring (6) is installed on the reset rod (5) and connected to the sand-blocking plate (4), the sand-blocking plate (4) is pressed down by the spring force so that the sand-blocking column (3) presses the sand outlet of the nozzle (2), and when shooting sand, the upper side of the upper core box (1) abuts against the lower end of the top column (7) so that the sand-blocking plate (4) and the sand-blocking column (3) move up synchronously to open the sand outlet of the nozzle.

2. The automatic sealing device for preventing sand leakage from dry sand nozzles according to claim 1, characterized in that, The upper end of the reset rod (5) extends outward and is provided with a stop. The spring (6) is sleeved in the reset rod (5), and the upper and lower ends respectively abut against the stop and the sand baffle (4).

3. The automatic sealing device for preventing sand leakage from dry sand nozzles according to claim 1, characterized in that, The bottom end of the top column (7) is provided with a stop block. The top column (7) abuts against the upper side of the upper core box (1) through the stop block. The upper end of the stop block can abut against the lower side of the sand shooting plate (9).

4. The automatic sealing device for preventing sand leakage from dry sand nozzles according to claim 1, characterized in that, The nozzle (2) is arranged in a ring around the sand-shooting plate (9), and the sand-blocking plate (4) is arranged in a strip shape around the nozzle (2).

5. The automatic sealing device for preventing sand leakage from dry sand nozzles according to claim 4, characterized in that, The reset rod (5) is set at the four corners of the sand baffle (4).

6. The automatic sealing device for preventing sand leakage from dry sand nozzles according to claim 4, characterized in that, The top column (7) is symmetrically arranged on both sides of the center of the sand baffle (4). The upper end of the top column (7) is fixed to the connecting plate (8), and the two ends of the connecting plate (8) are fixed to the two sides of the sand baffle (4).

7. The automatic sealing device for preventing sand leakage from dry sand nozzles according to any one of claims 1 to 6, characterized in that, The lower end of the sand-blocking column (3) is a conical head, which contacts the sand outlet surface of the nozzle (2).

Images