A cylinder sand core casting mold

Abstract

This application specifically discloses a cylinder block sand core casting mold, which includes a lower core box, an upper core box, and a sand core casting cavity formed by the lower core box and the upper core box. A sand-shooting plate is installed above the upper core box, and the sand-shooting plate is provided with multiple sand-shooting components. Each sand-shooting component includes an installation port on the upper core box, a nozzle bushing at the installation port, and a sand-shooting nozzle connected to the sand-shooting plate. The sand-shooting nozzle is adapted to extend into the nozzle bushing, with its end facing and communicating with the sand core casting cavity. A support sleeve is provided at the end of the sand-shooting nozzle to ensure its stability during sand-shooting, reducing deviation or vibration during sand ejection and improving sand-shooting accuracy. Furthermore, a limiting plate is provided on the circumferential surface of the tail of the sand-shooting nozzle. When the sand-shooting nozzle extends into the nozzle bushing, the limiting plate is adapted to limit the extension stroke of the sand-shooting nozzle, preventing over-insertion. The nozzle bushing and the sand-shooting nozzle are made of wear-resistant materials to reduce wear after long-term use and extend the mold life.

Description

Technical Field

[0001] This application relates to the field of mold structure, and in particular to a cylinder block sand core casting mold. Background Technology

[0002] Sand core casting is an important technique in metal casting, widely used in the production of complex structural components such as engine blocks and cylinder heads. The quality of the sand core directly affects the dimensional accuracy, surface quality, and internal structural integrity of the casting. Traditional sand core casting molds typically consist of an upper and lower core box, and sand is injected into the cavity to form the sand core. However, existing sand core casting molds still have certain limitations in terms of sand injection uniformity, sand core forming quality, and demolding efficiency.

[0003] Existing sand-shooting systems often employ a single sand-shooting nozzle structure, which can easily lead to uneven sand filling. This is especially true in complex cavity structures where sand-shooting dead zones can occur, affecting the density and strength of the sand core. Furthermore, when the sand-shooting nozzle mates with the nozzle bushing on the upper core box, there is a risk of wear due to over-insertion. The nozzle bushing and sand-shooting nozzle frequently require replacement and maintenance. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a cylinder block sand core casting mold.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A cylinder core casting mold includes a lower core box, an upper core box, and a sand core casting cavity formed by the upper core box. A sand-shooting plate is installed above the upper core box, and multiple sand-shooting components are provided on the sand-shooting plate. The ends of the sand-shooting components are connected to the sand core casting cavity.

[0007] The sand-shooting plate is equipped with an air-blowing plate mounting and positioning sleeve, and an air-blowing plate mounting and positioning pin is adapted on the air-blowing plate mounting and positioning sleeve. The end of the air-blowing plate mounting and positioning pin is connected to the air-blowing plate, and the air-blowing plate is supported on the sand-shooting plate by the air-blowing plate mounting and positioning pin.

[0008] Furthermore, the sand-shooting assembly includes an installation port on the upper core box, a nozzle bushing at the installation port, and a sand-shooting nozzle connected to the sand-shooting plate. The sand-shooting nozzle is adapted to extend into the nozzle bushing, and the end of the sand-shooting nozzle faces and communicates with the sand core casting cavity.

[0009] Furthermore, a limiting plate is provided on the circumferential surface of the tail end of the sand-shooting nozzle. When the sand-shooting nozzle extends into the nozzle bushing, the limiting plate is adapted to limit the extension stroke of the sand-shooting nozzle.

[0010] Furthermore, a support sleeve is provided on the end circumference of the sand injection nozzle. When the sand injection nozzle is inserted into the nozzle bushing, the support sleeve abuts against the inner wall of the nozzle bushing.

[0011] Furthermore, an upper push rod assembly is provided above the upper core box, and a lower push rod assembly is provided below the lower core box.

[0012] Furthermore, the upper ejector assembly includes an upper ejector core plate disposed above the air blowing plate, an upper ejector rod connected to the upper ejector core plate, the end of the upper ejector rod facing the nozzle bushing, and adapted to penetrate the nozzle bushing and extend into the sand core casting cavity.

[0013] Furthermore, the lower push rod assembly includes a lower push core plate disposed below the lower core box, a lower push rod connected to the lower push core plate, a lower push rod sleeve disposed on the lower core box, and the end of the lower push rod being adapted to pass through the lower push rod sleeve and extend into the sand core casting cavity.

[0014] Furthermore, both the lower and upper core boxes have sprues on their opposing surfaces, which are located on the inner wall of the sand core casting cavity.

[0015] Furthermore, a cylinder is installed on the lower core box, and a pull block is connected to the end of the cylinder, which extends into the sand core casting cavity.

[0016] The beneficial effects of this application are as follows: 1. This application uses multiple sand-shooting components distributed on the upper core box, so that the sand can be evenly filled to all parts of the sand core casting cavity, avoiding the problem of uneven filling or sand-shooting dead corners caused by traditional single sand-shooting nozzles, thereby improving the overall density and strength of the sand core.

[0017] The end of the sand-shooting nozzle is equipped with a support sleeve to ensure that the sand-shooting nozzle remains stable during the sand-shooting process, reduce the deviation or vibration during sand spraying, and improve the sand-shooting accuracy. In addition, a limiting plate is provided on the circumference of the tail of the sand-shooting nozzle. When the sand-shooting nozzle extends into the nozzle bushing, the limiting plate is suitable for limiting the extension stroke of the sand-shooting nozzle, avoiding the problem of excessive insertion of the sand-shooting nozzle. The nozzle bushing and the sand-shooting nozzle are made of wear-resistant materials to reduce wear after long-term use and extend the mold life.

[0018] 2. This application uses an upper ejector assembly and a lower ejector assembly to work together to ensure that the sand core is subjected to uniform force during demolding and to avoid deformation or damage to the sand core caused by unilateral ejection. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional schematic diagram of this application.

[0021] Figure 2 for Figure 1 Enlarged view of the mid-sand jet assembly.

[0022] Figure 3 This is a schematic diagram of the inner surface of the core box in this application.

[0023] Figure 4 This is a schematic diagram of the inner surface of the core box in this application. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Reference Figure 1 A cylinder core casting mold includes a lower core box 1 and an upper core box 2. The lower core box 1 and the upper core box 2 form a sand core casting cavity 3. A sand-shooting plate 4 is installed above the upper core box 2. The sand-shooting plate 4 is provided with multiple sand-shooting components 5. The ends of the sand-shooting components 5 are connected to the sand core casting cavity 3.

[0026] The sand-shooting plate 4 is provided with an air-blowing plate mounting and positioning sleeve 6, and an air-blowing plate mounting and positioning pin 7 is adapted on the air-blowing plate mounting and positioning sleeve 6. The end of the air-blowing plate mounting and positioning pin 7 is connected to the air-blowing plate 8, and the air-blowing plate 8 is supported on the sand-shooting plate 4 through the air-blowing plate mounting and positioning pin 7.

[0027] The sand-shooting assembly 5 includes a mounting port 51 on the upper core box 2, a nozzle bushing 52 at the mounting port 51, and a sand-shooting nozzle 53 connected to the sand-shooting plate 4. The sand-shooting nozzle 53 is adapted to extend into the nozzle bushing 52, and the end of the sand-shooting nozzle 53 faces and communicates with the sand core casting cavity 3.

[0028] A limiting plate 531 is provided on the circumferential surface of the tail of the sand-shooting nozzle 53. When the sand-shooting nozzle 53 extends into the nozzle bushing 52, the limiting plate 531 is adapted to limit the extension stroke of the sand-shooting nozzle 53.

[0029] A support sleeve 532 is provided on the end circumference of the sand injection nozzle 53. When the sand injection nozzle 53 extends into the nozzle bushing 52, the support sleeve 532 abuts against the inner wall of the nozzle bushing 52.

[0030] The upper core box 2 is provided with an upper push rod assembly 9 above it, and the lower core box 1 is provided with a lower push rod assembly 10 below it.

[0031] The upper push rod assembly 9 includes an upper core plate 91 disposed above the air blowing plate 8, an upper push rod 92 connected to the upper core plate 91, the end of the upper push rod 92 facing the nozzle bushing 52, and adapted to penetrate the nozzle bushing 52 and extend into the sand core casting cavity 3.

[0032] The lower push rod assembly 10 includes a lower push core plate 101 disposed below the lower core box 1, a lower push rod 102 connected to the lower push core plate 101, a lower push rod sleeve 103 disposed on the lower core box 1, and the end of the lower push rod 102 is adapted to pass through the lower push rod sleeve 103 and extend into the sand core casting cavity 3.

[0033] Both the lower core box 1 and the upper core box 2 have sprues 11 on their opposing surfaces, and the sprues 11 are located on the inner wall of the sand core casting cavity 3.

[0034] A cylinder 12 is mounted on the lower core box 1, and a pull block 13 is connected to the end of the cylinder 12. The pull block 13 extends into the sand core casting cavity 3. The cylinder casting usually has complex internal cavities (such as cooling water jackets, oil channels, etc.), and these structures cannot be directly formed by simple upper and lower core box parting. Driven by the cylinder 12, the pull block 13 can be pulled out laterally after the sand core is formed, thereby forming the required complex internal cavity or lateral groove structure on the sand core.

[0035] During mold processing in this application, the sand-shooting plate 4 is close to the upper core box 2, and the sand-shooting nozzle 53 extends into the nozzle bushing 52. The sand-shooting nozzle 53 injects material into the sand core casting cavity 3, and then withdraws the sand-shooting plate 4. The air-blowing plate 8 is close to the upper core box 2, and ammonia gas is blown into the sand core casting cavity 3 through the gas nozzle on the air-blowing plate 8 into the nozzle bushing 52. The ammonia gas solidifies and shapes the sand in the sand core casting cavity 3. After the shaping is completed, the ends of the upper ejector rod 92 and the lower ejector rod 102 extend into the sand core casting cavity 3 to lift the sand core, and after removal, it proceeds to the next process.

[0036] This application uses multiple sand-shooting components distributed on the upper core box 2, so that the sand can be evenly filled to all parts of the sand core casting cavity 3, avoiding the problem of uneven filling or sand-shooting dead corners caused by traditional single sand-shooting nozzles, thereby improving the overall density and strength of the sand core.

[0037] The end of the sand-shooting nozzle 53 is provided with a support sleeve 532 to ensure that the sand-shooting nozzle 53 remains stable during the sand-shooting process, reduce the deviation or vibration during sand spraying, and improve the sand-shooting accuracy. In addition, a limiting plate 531 is provided on the circumferential surface of the tail of the sand-shooting nozzle 53. When the sand-shooting nozzle 53 extends into the nozzle bushing 52, the limiting plate 531 is suitable for limiting the extension stroke of the sand-shooting nozzle 53, avoiding the problem of excessive insertion of the sand-shooting nozzle 53. The nozzle bushing 52 and the sand-shooting nozzle 53 are made of wear-resistant materials to reduce wear after long-term use and extend the mold life.

[0038] This application employs an upper ejector assembly 9 and a lower ejector assembly 10 working together to ensure that the sand core is subjected to uniform force during demolding, thus avoiding deformation or damage to the sand core caused by unilateral ejection.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cylinder block sand core casting mold, comprising a lower core box and an upper core box, wherein the lower core box and the upper core box form a sand core casting cavity, characterized in that, A sand-shooting plate is installed above the upper core box. The sand-shooting plate is provided with multiple sand-shooting components. The ends of the sand-shooting components are connected to the sand core casting cavity. The sand-shooting plate is provided with an air-blowing plate mounting and positioning sleeve, and an air-blowing plate mounting and positioning pin is adapted on the air-blowing plate mounting and positioning sleeve. The end of the air-blowing plate mounting and positioning pin is connected to the air-blowing plate, and the air-blowing plate is supported on the sand-shooting plate by the air-blowing plate mounting and positioning pin.

2. The cylinder block sand core casting mold according to claim 1, characterized in that, The sand-shooting assembly includes an installation port on the upper core box, a nozzle bushing at the installation port, and a sand-shooting nozzle connected to the sand-shooting plate. The sand-shooting nozzle is adapted to extend into the nozzle bushing, and the end of the sand-shooting nozzle faces and communicates with the sand core casting cavity.

3. The cylinder block sand core casting mold according to claim 2, characterized in that, A limiting plate is provided on the circumferential surface of the tail end of the sand-shooting nozzle. When the sand-shooting nozzle extends into the nozzle bushing, the limiting plate is adapted to limit the extension stroke of the sand-shooting nozzle.

4. The cylinder block sand core casting mold according to claim 2, characterized in that, The end circumference of the sand-shooting nozzle is provided with a support sleeve. When the sand-shooting nozzle is inserted into the nozzle bushing, the support sleeve abuts against the inner wall of the nozzle bushing.

5. The cylinder block sand core casting mold according to claim 2, characterized in that, An upper push rod assembly is provided above the upper core box, and a lower push rod assembly is provided below the lower core box.

6. The cylinder block sand core casting mold according to claim 5, characterized in that, The upper push rod assembly includes an upper core plate disposed above the air blowing plate, an upper push rod connected to the upper core plate, the end of the upper push rod facing the nozzle bushing, and adapted to extend through the nozzle bushing into the sand core casting cavity.

7. The cylinder block sand core casting mold according to claim 5, characterized in that, The lower push rod assembly includes a lower push core plate disposed below the lower core box, a lower push rod connected to the lower push core plate, a lower push rod sleeve provided on the lower core box, and the end of the lower push rod being adapted to pass through the lower push rod sleeve and extend into the sand core casting cavity.

8. The cylinder block sand core casting mold according to claim 1, characterized in that, The lower core box and the upper core box both have sprues on their opposing surfaces, and the sprues are located on the inner wall of the sand core casting cavity.

9. The cylinder block sand core casting mold according to claim 1, characterized in that, A cylinder is installed on the lower core box, and a pull block is connected to the end of the cylinder. The pull block extends into the sand core casting cavity.

Images