Metal mold for molding mud core of large cylinder sleeve

Abstract

The utility model discloses a large cylinder sleeve mud core modeling metal mold, which relates to the technical field of molds, and particularly comprises a mud core head section mold, a riser section mold and a blank inner hole section mold, and the riser section mold is positioned between the mud core head section mold and the blank inner hole section mold. The dead head section mold is connected with the mud core head section mold and the blank inner hole section mold through bolts, the dead head section mold and the mud core head section mold are positioned through a positioning device, and the dead head section mold and the blank inner hole section mold are positioned through a positioning device. The large cylinder sleeve mud core modeling metal mold has the advantages of being high in rigidity, not prone to oxidation and the like, not prone to deformation and damage in the production process and good in mold surface quality precision. Produced casting blanks are less in surface burnt-on sand and good in surface quality; the production time influenced by mold repairing is saved, the product yield is increased, the reinforcing rib plates are arranged between the mold parting surfaces, the overall bearing and rigidity of the mold are improved, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a large-scale cylinder sleeve mud core molding metal mold. Background Art

[0002] Molds are a crucial component of casting production, and their quality determines the ultimate quality of the casting. Cylinder liners, key components of large diesel engines, require the casting quality of their inner bore, a crucial factor directly impacting engine performance. The surface quality and dimensions of the inner bore core during the cylinder liner casting process directly determine the surface condition of the cylinder liner's inner bore.

[0003] Currently, in the production of large cylinder liners, wooden molds are primarily used to create inner bore cores. While wooden molds offer the advantage of lower costs, they are prone to deformation, breakage, and reduced surface quality during production. Frequent mold repair and remaking require significant time and cost, significantly impacting the inner bore quality, dimensions, and production cycle of the cylinder liner casting blank. Metal molds, however, due to their high rigidity, are less susceptible to deformation and breakage during production, and offer excellent surface quality and precision. The resulting castings exhibit less surface sand adhesion and superior surface quality, eliminating production time associated with mold repair and increasing product output. To address this issue, this patent provides a metal mold suitable for molding inner bore cores for large cylinder liners. Utility Model Content

[0004] The utility model provides a large cylinder sleeve clay core shaping metal mold, which solves the problem proposed in the above background technology that wooden molds are used to make inner hole clay cores, which requires frequent mold repair and remaking, affecting product quality, size and production cycle.

[0005] The utility model provides the following technical solutions: a large-scale cylinder liner core molding metal mold, the large-scale cylinder liner core molding metal mold is a segmented structure, including a core head section mold, a riser section mold and a blank inner hole section mold, the riser section mold is located between the core head section mold and the blank inner hole section mold, the riser section mold is connected to the core head section mold and the blank inner hole section mold by bolts, and the riser section mold and the core head section mold, as well as the riser section mold and the blank inner hole section mold, are positioned by positioning devices; the outer surface of the metal mold is symmetrically provided with a lifting device, and the outer surface of the blank inner hole section mold is provided with a mechanical demolding device;

[0006] The core head section mold is an integrated molding structure, including a side rib plate 1, a center cylinder 1, an upper plane 1, and a lower plane 1. The center cylinder 1 is located in the middle of the inner cavity of the side rib plate 1. The tops of the center cylinder 1 and the side rib plate 1 are sealed by the upper plane 1, and the bottoms of the center cylinder 1 and the side rib plate 1 are sealed by the lower plane 1.

[0007] The riser section mold is an integrated molding structure, including an upper plane 2, a lower plane 2, a side rib plate 2, an intermediate reinforcing rib plate and a center cylinder 2. The center cylinder 2 is located in the middle of the inner cavity of the side rib plate 2. The center cylinder 2 and the side rib plate 2 are connected by the upper plane 2, the intermediate reinforcing rib plate and the lower plane 2. The intermediate reinforcing rib plate is located between the upper plane 2 and the lower plane 2.

[0008] The mold for the inner hole section of the blank is a split type, including two half molds of the same size, which are connected by connecting bolts. The half mold includes an upper plane three, a lower plane three, a side rib three, another middle reinforcing rib and a central semi-cylinder. The side rib three is connected to the central semi-cylinder through an upper plane three, another middle reinforcing rib and a lower plane three. The other middle reinforcing rib is located between the upper plane three and the lower plane three.

[0009] Preferably, the outer surface of the side rib plate one, the outer surface of the side rib plate two and the outer surface of the side rib plate three are symmetrically provided with lifting devices.

[0010] Preferably, the central cylinder 1 is a conical structure, and the inner diameter of the top of the central cylinder 1 is smaller than the inner diameter of the bottom thereof.

[0011] Preferably, the upper end of the center cylinder 2 is a cylindrical structure, and the inner diameter of the cylindrical structure is larger than the outer diameter of the center cylinder 1, the lower end of the center cylinder 2 is a conical structure, the inner diameter of the top of the lower end of the center cylinder 2 is the same as the inner diameter of the upper end of the center cylinder 2, the inner diameter of the bottom of the lower end of the center cylinder 2 is larger than the inner diameter of its top, and the inner diameter of the bottom of the lower end of the center cylinder 2 is the same as the inner diameter of the center semi-cylinder.

[0012] Preferably, both ends of the blank inner hole section mold are provided with grooves, and the grooves are adapted to the connecting bolts.

[0013] Preferably, the positioning device includes positioning sleeves arranged on the lower plane 1 and the lower plane 2 and positioning posts arranged on the top of the upper plane 2 and the top of the upper plane 3, and the positioning sleeves are adapted to the positioning posts.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This large-scale cylinder liner core molding metal mold has the characteristics of high rigidity and non-oxidation. It is not easy to deform or break during the production process, and the mold surface quality and precision are good. The surface of the casting blank produced has less sand adhesion and good surface quality. It saves production time affected by mold repair and increases product output. In addition, reinforcing ribs are arranged between the parting surfaces to improve the overall load-bearing capacity and rigidity of the mold and extend the service life of the mold.

[0016] 2. The large cylinder sleeve core molding metal mold has a segmented structure, which reduces the difficulty of mold production. During the assembly process, it is positioned by a positioning device to ensure the mold assembly accuracy. A mechanical opening and closing device is installed on the parting surface to ensure that the sand mold can be smoothly removed during demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic front view of the cross-section of the structure of the utility model;

[0018] Figure 2 This is a schematic front view of the cross-section of the mold for the core head section of the structure of the utility model;

[0019] Figure 3 This is a top view of the mold for the core head section of the utility model;

[0020] Figure 4 This is a schematic front view of the cross-section of the riser section mold of the utility model;

[0021] Figure 5 This is a top view of the riser section mold of the utility model;

[0022] Figure 6 This is a top view schematic diagram of the inner hole section mold of the structural blank of the utility model.

[0023] In the figure: 1. Core head section mold; 2. Riser section mold; 3. Blank inner hole section mold; 4. Lifting device; 5. Groove; 6. Mechanical demoulding device; 7. Upper plane one; 8. Lower plane one; 9. Center cylinder one; 10. Upper plane two; 11. Lower plane two; 12. Center cylinder two; 13. Middle reinforcing rib plate; 14. Upper plane three; 15. Center semi-cylinder; 16. Connecting bolts; 17. Side rib plate one; 18. Side rib plate two; 19. Positioning column; 20. Positioning sleeve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0025] The utility model provides a large-scale cylinder sleeve clay core molding metal mold. The large-scale cylinder sleeve clay core molding metal mold is a segmented structure, which reduces the difficulty of mold production. It specifically includes a clay core head section mold 1, a riser section mold 2 and a blank inner hole section mold 3. The riser section mold 2 is located between the clay core head section mold 1 and the blank inner hole section mold 3. The riser section mold 2 is connected to the clay core head section mold 1 and the blank inner hole section mold 3 by bolts, and the riser section mold 2 and the clay core head section mold 1, as well as the riser section mold 2 and the blank inner hole section mold 3 are positioned by a positioning device. The positioning device can ensure the mold assembly accuracy; the outer surface of the metal mold is symmetrically provided with a lifting device 4, and the lifting device 4 is used to facilitate lifting the various sections of the metal mold when the clay core is demolded, so as to facilitate demolding. The outer surface of the blank inner hole section mold 3 is provided with a mechanical demolding device 6 to ensure that the sand mold can be smoothly taken out when demolding.

[0026] The core head section mold 1 is an integrated structure, comprising side ribs 17, a center cylinder 9, an upper plane 7, and a lower plane 8. The center cylinder 9 is located in the center of the inner cavity of the side ribs 17. The tops of the center cylinder 9 and the side ribs 17 are sealed by the upper plane 7, and the bottoms of the center cylinder 9 and the side ribs 17 are sealed by the lower plane 8. The center cylinder 9 is a conical structure, with the inner diameter of the top of the center cylinder 9 being smaller than that of the bottom. Lifting devices 4 are symmetrically arranged on the outer surface of the side ribs 17.

[0027] The riser section mold 2 is an integrated molding structure, including an upper plane 10, a lower plane 11, a side rib 18, an intermediate reinforcing rib 13 and a center cylinder 12. The center cylinder 12 is located in the middle of the inner cavity of the side rib 18. The center cylinder 12 and the side rib 18 are connected by the upper plane 10, the intermediate reinforcing rib 13 and the lower plane 11. The intermediate reinforcing rib 13 is located between the upper plane 10 and the lower plane 11; the upper end of the center cylinder 12 is a cylindrical structure, and the inner diameter of the cylindrical structure is larger than the outer diameter of the center cylinder 19; the lower end of the center cylinder 12 is a conical structure, the inner diameter of the top of the lower end of the center cylinder 12 is the same as the inner diameter of the upper end of the center cylinder 12, the inner diameter of the bottom of the lower end of the center cylinder 12 is larger than the inner diameter of its top, and the outer surface of the side rib 18 is symmetrically provided with a lifting device 4.

[0028] During assembly, the riser section mold 2 and the core head section mold 1 are positioned using a positioning device. This positioning device includes a positioning sleeve 20 mounted on the lower plane 1 8 and a positioning post 19 mounted on top of the upper plane 2 10. The positioning post 19 and positioning sleeve 20 allow the riser section mold 2 and the core head section mold 1 to be positioned correctly, ensuring the dimensional accuracy of the molds after assembly. The outer diameters of the riser section mold 2 and the core head section mold 1 are the same.

[0029] The mold 3 for the inner hole section of the blank is a split type, consisting of two identically sized halves connected by connecting bolts 16. The halves comprise upper plane 3 14, lower plane 3, side ribs 3, another intermediate reinforcing rib 13, and a central semi-cylinder 15. Side ribs 3 are connected to the central semi-cylinder 15 via upper plane 3 14, another intermediate reinforcing rib 13, and lower plane 3. The other intermediate reinforcing rib 13 is located between upper plane 3 14 and lower plane 3. Lifting devices 4 are symmetrically mounted on the outer surfaces of side ribs 3, and the inner diameter of the lower end of central cylinder 2 12 is the same as that of central semi-cylinder 15.

[0030] Both ends of the blank inner hole section mold 3 are provided with grooves 5, which are adapted to the connecting bolts 16. The grooves 5 are used to fasten the connecting bolts 16 to ensure that the parting surfaces of the two half molds are locked.

[0031] When the blank inner hole section mold 3 is connected to the riser section mold 2, another positioning device is used for positioning. The other positioning device includes another positioning sleeve 20 arranged on the lower plane 2 11 and another positioning column 19 arranged on the top of the upper plane 3 14. The other positioning sleeve 20 is adapted to the other positioning column 19 to ensure the mold installation accuracy.

[0032] In some embodiments of the present application, the large cylinder liner core molding metal mold is made of aluminum alloy, which has the characteristics of high rigidity and low oxidation resistance. The mold wall thickness is determined by the casting process requirements and the casting size and is not limited here.

[0033] Below, the present application is further described through an embodiment of the present application.

[0034] When making the S50ME-C9.7 cylinder liner core sand mold, first design and manufacture the cylinder liner mold according to the casting molding process, then fill it with resin sand and solidify it, then remove the core sand mold. The specific steps are as follows:

[0035] 1) Design and determine the size of the metal mold for the large cylinder liner core molding;

[0036] 2) Design and determination of segmented positioning and mechanical opening and closing devices for large cylinder sleeve core molding metal molds;

[0037] 3) Production and assembly of large cylinder liner core molding metal molds;

[0038] 4) Place the core steel tube;

[0039] 5) Fill the space between the mold and the core tube with resin sand, and vibrate the core tube to compact the resin sand in the core;

[0040] 6) Wait for the core resin sand to complete solidification;

[0041] 7) Remove the core mold by lifting the core head mold 1 and the riser mold 2 respectively;

[0042] 8) Remove the connecting bolts 16 of the blank inner hole section mold 3;

[0043] 9) The parting surface of the inner hole section of the blank is demoulded using a mechanical demoulding device 6;

[0044] 10) Lift out the core sand mold by crane;

[0045] 11) Reassemble the mold for next use.

[0046] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology and will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large cylinder liner core molding metal mold, characterized by: The large cylinder sleeve core molding metal mold is a segmented structure, comprising a core head mold (1), a riser mold (2) and a blank inner hole mold (3); the riser mold (2) is located between the core head mold (1) and the blank inner hole mold (3); the riser mold (2) is connected to the core head mold (1) and the blank inner hole mold (3) by bolts, and the riser mold (2) and the core head mold (1), as well as the riser mold (2) and the blank inner hole mold (3) are positioned by positioning devices; the outer surface of the metal mold is symmetrically provided with a lifting device (4), and the outer surface of the blank inner hole mold (3) is provided with a mechanical demoulding device (6); The core head section mold (1) is an integrally formed structure, comprising a side rib plate (17), a center cylinder (9), an upper plane (7) and a lower plane (8), wherein the center cylinder (9) is located in the middle of the inner cavity of the side rib plate (17), the tops of the center cylinder (9) and the side rib plate (17) are sealed by the upper plane (7), and the bottoms of the center cylinder (9) and the side rib plate (17) are sealed by the lower plane (8); The riser section mold (2) is an integrally formed structure, comprising an upper plane (10), a lower plane (11), a side rib plate (18), an intermediate reinforcing rib plate (13) and a center cylinder (12), wherein the center cylinder (12) is located in the middle of the inner cavity of the side rib plate (18), and the center cylinder (12) and the side rib plate (18) are connected through the upper plane (10), the intermediate reinforcing rib plate (13) and the lower plane (11), and the intermediate reinforcing rib plate (13) is located between the upper plane (10) and the lower plane (11); The blank inner hole section mold (3) is a split type, including two half molds of the same size, the two half molds are connected by connecting bolts (16), the half molds include upper plane three (14), lower plane three, side ribs three, another middle reinforcing rib (13) and a central semi-cylinder (15), the side ribs three and the central semi-cylinder (15) are connected by upper plane three (14), another middle reinforcing rib (13) and lower plane three, and the other middle reinforcing rib (13) is located between upper plane three (14) and lower plane three.

2. A large cylinder liner core molding metal mold according to claim 1, characterized in that: The outer surface of the side rib plate 1 (17), the outer surface of the side rib plate 2 (18) and the outer surface of the side rib plate 3 are symmetrically provided with lifting devices (4).

3. The large cylinder liner core molding metal mold according to claim 1, characterized in that: The central cylinder (9) is a conical structure, and the inner diameter of the top of the central cylinder (9) is smaller than the inner diameter of the bottom.

4. A large cylinder liner core molding metal mold according to claim 3, characterized in that: The upper end of the center cylinder 2 (12) is a cylindrical structure, and the inner diameter of the cylindrical structure is larger than the outer diameter of the center cylinder 1 (9). The lower end of the center cylinder 2 (12) is a conical structure. The inner diameter of the top of the lower end of the center cylinder 2 (12) is the same as the inner diameter of the upper end of the center cylinder 2 (12). The inner diameter of the bottom of the lower end of the center cylinder 2 (12) is larger than the inner diameter of its top, and the inner diameter of the bottom of the lower end of the center cylinder 2 (12) is the same as the inner diameter of the center semi-cylinder (15).

5. A large cylinder liner core molding metal mold according to claim 4, characterized in that: Both ends of the blank inner hole section mold (3) are provided with grooves (5), and the grooves (5) are adapted to the connecting bolts (16).

6. The large cylinder liner core molding metal mold according to claim 1, characterized in that: The positioning device comprises a positioning sleeve (20) arranged on the lower plane 1 (8) and the lower plane 2 (11) and a positioning column (19) arranged on the top of the upper plane 2 (10) and the top of the upper plane 3 (14), and the positioning sleeve (20) is adapted to the positioning column (19).

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