Core assembly pouring device for cylinder block casting in automobile engine

Abstract

The invention belongs to the technical field of metal casting, and particularly relates to a core assembly pouring device for a cylinder block casting in an automobile engine. The mold comprises an outer mold body, a pouring pipe, an inner mold body, a hanging assembly, a built-in cooling pipe and an external cooling assembly. Wherein the inner mold consists of a core mold and a sand mold covering the outer side of the core mold, the core mold comprises a core mold main body and a convex column body, and the sand mold comprises a sand mold main body and a convex pipe part; the core mold is made of a low-melting-point thermoplastic material, a hanging assembly and a built-in cooling pipe are embedded in the core mold, the built-in cooling pipe and an external cooling assembly jointly form a cooling system, the temperature of the core mold cannot be greatly increased in the pouring process through the cooling system, and the supporting reliability of the inner mold is guaranteed; and meanwhile, the core mold can be heated and melted after pouring is completed, the function of an evanescent mode is achieved, the consumption of a sand mold can be greatly reduced through use of the core mold, core mold materials are convenient to collect and recycle, the overall casting cost is reduced, and application and popularization are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of metal casting, and in particular relates to a core assembly pouring device for a cylinder casting in an automobile engine. Background Art

[0002] The cylinder block in the automobile engine is usually made by casting. Its structure is very complex and the cylinder wall is thin, so it is difficult to cast and has a high scrap rate. At present, there are two ways to cast the cylinder block in the automobile engine. One is to use a high-pressure molding line after core making to shape and cast, and the other is to use core assembly casting. However, these two casting methods have the following disadvantages: 1) For the first casting method, due to the expensive molding line equipment, this casting method is only used in large enterprises; at the same time, it adopts a horizontal casting process, and the water jacket wall of the cylinder block is thin and easy to deform, so the scrap rate is high and the production cost is high. 2) For the second casting method, because the sand core designed in the process design process is too large, the sand core is not easy to shape when making the sand core, and casting defects of the casting will occur; in addition, each sand core must be fastened with bolts when assembling the core, which increases the production process; at the same time, it is generally single-piece production, that is, one sand mold can only produce one product; therefore, the production efficiency is low.

[0003] To this end, the patent specification with publication number CN101817060B discloses a core casting device for cylinder castings in automobile engines, including a base plate, a riser core, a gate core, a sand core group and a locking device. The sand core group is connected to the base plate and locked by the locking device. The riser core and the gate core are located on the sand core group. The sand core groups are two adjacent groups, both of which are clamped on the base plate, and there are also two riser cores; the locking device is pressed on the outside of the two groups of sand core groups; each group of sand core groups includes a base plate core, a front end core, a plurality of cylinder cores arranged in parallel, and a water jacket core , rear end core, left plate core and right plate core; wherein, the right plate cores of the two groups are adjacent and are both clamped in the middle of the bottom plate, and the gate core is located in the middle of the top surfaces of the two adjacent right plate cores; the bottom plate core is slidably connected to the bottom plate; the water jacket core has the same number of holes as the cylinder core; the cylinder cores are all clamped on the bottom plate core, and are fitted one by one in the holes of the water jacket core; the cylinder core is clamped on the bottom plate core, the front end core and the rear end core are respectively clamped on the two cylinder cores at the ends of the cylinder cores arranged in parallel, and the two ends of the riser core are respectively clamped on the top surfaces of the front end core and the rear end core.

[0004] However, this kind of core assembly pouring device for cylinder castings in automobile engines still has some shortcomings. First, the support reliability of its sand core is poor, and it is easy to crack due to rapid temperature changes during the pouring process, resulting in casting defects of the casting; second, the consumption of its sand core is large, and the casting cost is high. Therefore, it needs to be optimized and improved. Summary of the invention

[0005] The purpose of the present invention is to overcome the above problems existing in the conventional technology and to provide a core assembly pouring device for cylinder castings in automobile engines.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a core assembly pouring device for a cylinder casting in an automobile engine, comprising an outer mold, a pouring pipe, an inner mold, a suspension component, an internal cooling pipe and an external cooling component;

[0008] The inner mold is composed of a core mold and a sand mold covering the outer side thereof, wherein the core mold includes a core mold body and a plurality of convex cylinders located on the top thereof, and the sand mold includes a sand mold body and a plurality of convex tubes located on the top thereof;

[0009] The inner mold is located in the core mold and is pre-embedded with a suspension component that provides support for it;

[0010] The inner mold is located in the core mold and is pre-buried with an internal cooling pipe. The internal cooling pipe and the external cooling component together constitute a cooling system that provides a cold-keeping function for the core mold. The core mold is made of a low-melting-point thermoplastic material.

[0011] Furthermore, in the core assembly pouring device for the cylinder casting of the above-mentioned automobile engine, the outer mold is formed by connecting two half molds, and the two half molds are detachably connected by bolts. An outer mold cavity is provided inside the outer mold, and a pouring port for facilitating the insertion of a pouring pipe and a clamping interface for facilitating the clamping of a convex pipe portion are provided on the upper part of the outer mold.

[0012] Furthermore, in the core assembly pouring device for the cylinder block casting of the automobile engine, the inner wall of the outer mold located in the outer mold cavity is provided with a ceramic lining member that matches the shape of the outer wall of the cylinder block of the automobile engine.

[0013] Furthermore, in the core assembly pouring device for the cylinder casting of the automobile engine, the overall shape of the sand mold matches the shape of the inner wall of the cylinder casting of the automobile engine.

[0014] Furthermore, in the core assembly pouring device for the cylinder casting of the automobile engine, the sand mold body in the sand mold is spliced ​​together by a plurality of sand module modules.

[0015] Furthermore, in the core assembly pouring device for the cylinder casting of the automobile engine, the core mold is provided with a clamping protrusion or a clamping groove on the outer surface of the core mold body for facilitating the clamping and installation of the sand module.

[0016] Furthermore, in the core assembly pouring device of the cylinder casting in the above-mentioned automobile engine, the suspension assembly includes a linear guide pair, a hanging rod and a heating tube, the hanging rod passes through a convex column in the core mold, the top end of the hanging rod is fixed to the lower side of the slider of the linear guide pair, and the bottom end of the hanging rod is equipped with a heating tube for melting the core mold, and the outer diameter of the heating tube is smaller than the outer diameter of the convex column.

[0017] Furthermore, in the core assembly casting device of the cylinder casting in the above-mentioned automobile engine, the tube body of the built-in cooling pipe is evenly distributed on the surface of the core mold close to the sand mold, and the two ends of the built-in cooling pipe are led out from the convex column in the core mold; the external cooling component includes a circulating cooling water trough, a lifting push rod, a push plate, a telescopic pipe and a joint, and the input end and the output end of the circulating cooling water trough are installed with a telescopic pipe with a joint, and the joint is fixed on the push plate, and the push plate is driven by the lifting push rod to perform vertical displacement, and the joint can move down with the push plate to connect with the two ends of the built-in cooling pipe.

[0018] The beneficial effects of the present invention are:

[0019] The invention provides a core assembly pouring device for cylinder castings in automobile engines, comprising an outer mold, a pouring pipe, an inner mold, a suspension component, an internal cooling pipe and an external cooling component; wherein the inner mold is composed of a core mold and a sand mold wrapped on the outer side thereof, the core mold comprises a core mold body and a plurality of convex columns located on the top thereof, and the sand mold comprises a sand mold body and a plurality of convex pipe parts located on the top thereof; the core mold is made of a low-melting-point thermoplastic material, a suspension component and an internal cooling pipe are pre-embedded in the core mold, and the internal cooling pipe and the external cooling component together constitute a cooling system that provides a cold-keeping function for the core mold, through the cooling system, the temperature of the core mold will not increase significantly during the pouring process, thereby ensuring the support reliability of the inner mold, and at the same time, the core mold can be heated and melted after the pouring is completed, thereby playing the function of a "lost foam", and the use of the core mold can greatly reduce the consumption of the sand mold, and the core mold material is easy to collect for recycling, thereby reducing the overall casting cost and facilitating popularization and use.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the main structure of the outer mold in the present invention;

[0024] Figure 3 It is a schematic diagram of the top view of the outer mold in the present invention;

[0025] Figure 4 It is a schematic diagram of the assembly of the inner mold, the suspension assembly, and the built-in cooling pipe in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the suspension assembly in the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the external cooling assembly in the present invention;

[0028] In the accompanying drawings, the reference numerals of the various components are as follows:

[0029] 1-outer mold, 101-outer mold cavity, 102-pouring port, 103-card interface, 2-pouring tube, 3-core mold, 301-core mold body, 302-convex cylinder, 4-sand mold, 401-sand mold body, 402-convex tube, 5-suspension assembly, 501-linear guide pair, 502-hanging rod, 503-heating tube, 6-built-in cooling tube, 7-external cooling assembly, 701-circulating cooling water tank, 702-lifting push rod, 703-push plate, 704-telescopic tube, 705-connector. DETAILED DESCRIPTION

[0030] 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 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 creative work are within the scope of protection of the present invention.

[0031] like Figure 1-Figure 6 As shown, this embodiment provides a core assembly pouring device for cylinder castings in automobile engines, including an outer mold 1, a pouring pipe 2, an inner mold, a suspension component 5, an internal cooling pipe 6 and an external cooling component 7. The inner mold is composed of a core mold 3 and a sand mold 4 wrapped on the outside thereof, the core mold 3 includes a core mold body 301 and a plurality of convex cylinders 302 located on the top thereof, and the sand mold 4 includes a sand mold body 401 and a plurality of convex pipe portions 402 located on the top thereof; the inner mold is located in the core mold 3 and a suspension component 5 is pre-embedded therein to provide support therefor; the inner mold is located in the core mold 3 and a internal cooling pipe 6 is pre-embedded therein, and the internal cooling pipe 6 and the external cooling component 7 together constitute a cooling system that provides a cold-keeping function for the core mold 3, and the core mold 3 is made of a low-melting-point thermoplastic material.

[0032] In this embodiment, the outer mold 1 is formed by butting two half molds, and the two half molds are detachably connected by bolts. The outer mold 1 is provided with an outer mold cavity 101 inside, and the upper part of the outer mold 1 is provided with a pouring port 102 for inserting the pouring pipe 2 and a clamping interface 103 for clamping the convex pipe part 402.

[0033] In this embodiment, the inner wall of the outer mold 1 located in the outer mold cavity 101 is provided with a ceramic lining member that matches the shape of the outer wall of the cylinder block of the automobile engine. The design of the ceramic lining member is conducive to demolding the molded automobile engine cylinder block casting.

[0034] In this embodiment, the overall shape of the sand mold 4 matches the shape of the inner wall of the cylinder body in the automobile engine.

[0035] In this embodiment, the sand mold body 401 in the sand mold 4 is formed by splicing a plurality of sand module modules.

[0036] In this embodiment, the outer surface of the core mold 3 located at the core mold body 301 is provided with a clamping protrusion or a clamping groove for facilitating the clamping and installation of the sand module.

[0037] In this embodiment, the suspension assembly 5 includes a linear guide pair 501, a hanging rod 502 and a heating tube 503. The hanging rod 502 passes through a convex column 302 in the core mold 3. The top end of the hanging rod 502 is fixed to the lower side of the slider of the linear guide pair 501. The bottom end of the hanging rod 502 is installed with a heating tube 503 for melting the core mold 3. The outer diameter of the heating tube 503 is smaller than the outer diameter of the convex column 302.

[0038] In this embodiment, the tube body of the built-in cooling tube 6 is evenly distributed on the surface of the core mold 3 close to the sand mold 4, and the two ends of the built-in cooling tube 6 are led out from the convex column 302 in the core mold 3; the external cooling component 7 includes a circulating cooling water trough 701, a lifting push rod 702, a push plate 703, a telescopic tube 704 and a joint 705, and the input end and output end of the circulating cooling water trough 701 are installed with a telescopic tube 704 with a joint 705, and the joint 705 is fixed on the push plate 703. The push plate 703 is driven by the lifting push rod 702 to perform vertical displacement, and the joint 705 can move down with the push plate 703 to connect with the two ends of the built-in cooling tube 6.

[0039] A specific application of this embodiment is: the present application provides a core assembly pouring device for a cylinder casting in an automobile engine, comprising an outer mold 1, a pouring pipe 2, an inner mold, a suspension assembly 5, an internal cooling pipe 6 and an external cooling assembly 7; wherein the inner mold is composed of a core mold 3 and a sand mold 4 wrapped on the outside thereof, the core mold 3 comprises a core mold body 301 and a plurality of convex cylinders 302 located on the top thereof, and the sand mold 4 comprises a sand mold body 401 and a plurality of convex tube portions 402 located on the top thereof; the core mold 3 is made of a low-melting-point thermoplastic material, and the core mold 3 is made of a low-melting-point thermoplastic material, and the core mold 3 is made of a low-melting-point thermoplastic material, and the core mold 3 is made of a high ... A suspension component 5 and a built-in cooling pipe 6 are pre-buried. The built-in cooling pipe 6 and the external cooling component 7 together constitute a cooling system that provides a cold-keeping function for the core mold 3. The cooling system prevents the temperature of the core mold 3 from rising significantly during the pouring process, thereby ensuring the support reliability of the inner mold. At the same time, the core mold 3 can be heated and melted after the pouring is completed, thereby playing the function of a "lost foam". The use of the core mold 3 can greatly reduce the consumption of the sand mold 4, and the material of the core mold 3 is easy to collect and recycle, thereby reducing the overall casting cost and facilitating its popularization and use.

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A core assembly pouring device for cylinder castings in automobile engines, characterized in that: It includes outer mold, pouring pipe, inner mold, suspension assembly, internal cooling pipe and external cooling assembly; The inner mold is composed of a core mold and a sand mold covering the outer side thereof, wherein the core mold includes a core mold body and a plurality of convex cylinders located on the top thereof, and the sand mold includes a sand mold body and a plurality of convex tubes located on the top thereof; The inner mold is located in the core mold and has a suspension component pre-embedded therein to provide support therefor; The inner mold is located in the core mold and is pre-buried with an internal cooling pipe. The internal cooling pipe and the external cooling component together constitute a cooling system that provides a cold-keeping function for the core mold. The core mold is made of a low-melting-point thermoplastic material.

2. The core assembly pouring device for cylinder casting of automobile engine according to claim 1, characterized in that: The outer mold is formed by butting two half molds, and the two half molds are detachably connected by bolts. An outer mold cavity is arranged inside the outer mold, and a pouring port for inserting a pouring pipe and a clamping interface for clamping a convex pipe portion are opened on the upper part of the outer mold.

3. The core assembly pouring device for cylinder casting of automobile engine according to claim 2, characterized in that: The inner wall of the outer mold cavity is provided with a ceramic lining member which matches the shape of the outer wall of the cylinder body in the automobile engine.

4. The core assembly pouring device for cylinder casting of automobile engine according to claim 3, characterized in that: The overall shape of the sand mold matches the shape of the inner wall of the cylinder body in the automobile engine.

5. The core assembly pouring device for cylinder casting of automobile engine according to claim 4, characterized in that: The sand mold body in the sand mold is formed by splicing a plurality of sand module modules.

6. The core assembly pouring device for cylinder casting of automobile engine according to claim 5, characterized in that: The core mold is provided with a clamping protrusion or a clamping groove on the outer surface of the core mold body for facilitating clamping and installing the sand module.

7. The core assembly pouring device for cylinder casting of automobile engine according to claim 6, characterized in that: The suspension assembly includes a linear guide pair, a hanging rod and a heating tube. The hanging rod passes through a convex column in the core mold. The top end of the hanging rod is fixed to the lower side of the slider of the linear guide pair. The bottom end of the hanging rod is equipped with a heating tube for melting the core mold. The outer diameter of the heating tube is smaller than the outer diameter of the convex column.

8. The core assembly pouring device for cylinder casting of automobile engine according to claim 7, characterized in that: The tube body of the built-in cooling pipe is evenly distributed on the surface of the core mold close to the sand mold, and the two ends of the built-in cooling pipe are led out from the convex column in the core mold; the external cooling component includes a circulating cooling water tank, a lifting push rod, a push plate, a telescopic pipe and a joint, and the input and output ends of the circulating cooling water tank are installed with telescopic pipes with joints, and the joints are fixed on the push plate. The push plate is driven by the lifting push rod to perform vertical displacement, and the joints can move down with the push plate to connect with the two ends of the built-in cooling pipe.

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