Cold core box assembly and cold core machine

Abstract

The utility model belongs to the technical field of casting, and particularly relates to a cold core box assembly and a cold core machine, the cold core box assembly comprises a lower core box, the upper part of the lower core box is provided with a core pulling mechanism, and the core pulling mechanism is suitable for driving a movable limiting block to translate; an upper limiting block is arranged on the lower surface of the upper core box; and when the lower core box and the upper core box are closed, the core pulling mechanism pushes the movable limiting block to translate and abut against the upper limiting block so as to limit the lower core box and the upper core box. When the cold core box assembly is used for production and casting, mold closing of a core head pulling block of an ejector rod hole can be guaranteed in place during sand shooting, the size and the shape of a core head are guaranteed, and therefore core splicing meets the technological requirement, and fins of a casting are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting, and in particular relates to a cold core box component and a cold core machine. Background Art

[0002] In the related art, the shell core machine is a widely used equipment in the foundry industry, mainly used to make coated sand shell cores. Its working principle is based on the hot core box process. By injecting a core sand mixture containing liquid or solid thermosetting resin into the heated core box, the sand core is quickly hardened to a certain thickness (about 5-10mm) in the hot core box, thereby producing a finished sand core. The main body cores of small varieties are basically produced by shell core machines. The efficiency of shell cores is low, with only 60-80 shots in one shift. For example, two shell core machines are required to produce three main body cores for 380 and 390 bodies. The rhythm of core making causes the main body core to be made in advance to meet the production of the KW line. The long placement time of the sand core affects the quality of the casting. For this reason, the foundry decided to use cold core core making for the main body core. However, when using the cold core machine to shoot sand during casting, one is that the sand runs away and the sand core is not shot enough; the other is that the ejector hole core head withdraws the block, resulting in the ejector hole core not being able to be assembled in place when the core is assembled, so the core size is prone to problems.

[0003] In order to solve the technical problem of core size deviation caused by insufficient sand injection due to improper mold closing when using a cold core machine for casting, it is urgent to design a cold core box assembly. Utility Model Content

[0004] The utility model aims to provide a cold box assembly to solve the above technical problems.

[0005] In order to solve the above technical problems, the utility model provides a cold core box assembly, including: a lower core box, a core pulling mechanism is provided on the upper part of which, and the core pulling mechanism is suitable for driving a movable limit block to move in translation; an upper core box, an upper limit block is provided on the lower surface of which; and when the lower core box and the upper core box are molded together, the core pulling mechanism pushes the movable limit block to move in translation and abut against the upper limit block to limit the lower and upper core boxes.

[0006] Furthermore, the core pulling mechanism includes: a core box pulling block mounting plate, the outer side of which fixes the movable limit block; and a plurality of pulling blocks, which are arranged on the side of the core box pulling block mounting plate close to the mold cavity; and a cylinder, the piston rod of the cylinder is connected to the core box pulling block mounting plate to push the core box pulling block mounting plate to drive the movable limit block to translate.

[0007] Furthermore, two cylinders are used and are symmetrically arranged on both sides of the core box block mounting plate.

[0008] Furthermore, the pull-out block comprises: a cylinder sleeve hole pull-out block and a push rod hole core head pull-out block; when the cylinder pushes the core box pull-out block mounting plate to translate, the core box pull-out block mounting plate drives the cylinder sleeve hole pull-out block and the push rod hole pull-out block to translate.

[0009] Furthermore, at least one guide hole is arranged on the core box block mounting plate; a guide rod is passed through the guide hole so that the core box block mounting plate can be translated along the guide rod.

[0010] Furthermore, a fixing block for connecting the guide rod is also provided on the lower core box.

[0011] Furthermore, the abutting surface between the movable limiting block and the upper limiting block is an inclined surface.

[0012] Furthermore, the angle formed by the inclined plane and the horizontal plane is between 55° and 80°.

[0013] Furthermore, the upper core box is provided with a feed port connected to the mold cavity.

[0014] In a second aspect, the utility model provides a cold core machine, comprising: a cold core box assembly; and

[0015] The material spraying device is connected with the material feeding port.

[0016] The beneficial effect of the utility model is that when the cold core box assembly is used for production casting, it can be ensured that the core head of the ejector hole is pulled out and molded in place during sand shooting, and the size and shape of the core head are guaranteed, so that the core assembly meets the process requirements and the casting seam is reduced.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is an overall diagram of a cold core machine provided in some embodiments;

[0021] Figure 2is a partial view of a lower core box of a cold core box provided in some embodiments;

[0022] Figure 3 It is a partial view of the upper core box of the cold core box provided in some embodiments.

[0023] In the figure:

[0024] 1. Cold core box assembly, 2. Spraying equipment, 10. Upper core box, 11. Upper limit block, 12. Feed inlet, 20. Lower core box, 21. Fixed block, 30. Core box drawer block mounting plate, 31. Movable limit block, 32. Cylinder, 33. Guide rod, 34. Cylinder sleeve hole drawer block, 35. Ejector rod hole core head drawer block, 36. Guide hole, 40. Base. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the related art, the shell core machine is a widely used equipment in the foundry industry, mainly used to make coated sand shell cores. Its working principle is based on the hot core box process. By injecting a core sand mixture containing liquid or solid thermosetting resin into the heated core box, the sand core is quickly hardened to a certain thickness (about 5-10mm) in the hot core box, thereby producing a finished sand core. The main body cores of small varieties are basically produced by shell core machines. The efficiency of shell cores is low, with only 60-80 shots in one shift. For example, two shell core machines are required to produce three main body cores for 380 and 390 bodies. The rhythm of core making causes the main body core to be made in advance to meet the production of the KW line. The long placement time of the sand core affects the quality of the casting. For this reason, the foundry decided to use cold core core making for the main body core. However, when using the cold core machine to shoot sand during casting, one is that the sand runs away and the sand core is not shot enough; the other is that the ejector hole core head withdraws the block, resulting in the ejector hole core not being able to be assembled in place when the core is assembled, so the core size is prone to problems.

[0027] In order to solve the technical problem of core size deviation caused by insufficient sand injection due to improper mold closing when using a cold core machine for casting, it is urgent to design a cold core box assembly and a cold core machine.

[0028] like Figure 1As shown, at least one embodiment of the cold core box assembly 1 comprises: a lower core box 20, the upper part of which is provided with a core pulling mechanism, which is suitable for driving the movable limit block 31 to translate; an upper core box 10, the lower surface of which is provided with an upper limit block 11; and when the lower core box 20 and the upper core box 10 are molded together, the core pulling mechanism pushes the movable limit block 31 to translate and abut against the upper limit block 11 to limit the lower and upper core boxes 10. When making the core, the core pulling mechanism is translated into place before the mold is closed. When opening the mold, the mold is opened first and then the core pulling mechanism is pulled out. In this way, by adding a limiting structure, insufficient core shooting can be prevented from being caused by the withdrawal of the block pulling mechanism during core shooting.

[0029] In some embodiments, the core pulling mechanism includes: a core box block mounting plate 30, the outer side of which is fixed with the movable limit block 31. When the core pulling mechanism translates, it drives the core box block mounting plate 30 and the movable limit block 31 fixed on its outer side to translate; and a plurality of pulling blocks, which are arranged on the side of the core box block mounting plate 30 close to the mold cavity. When making cores, the core pulling mechanism translates into place, that is, the plurality of pulling blocks translate into place, and the pulling blocks translate into the mold cavity for core shooting during casting; and a cylinder 32, the piston rod of the cylinder 32 is connected to the core box block mounting plate 30 to push the core box block mounting plate 30 to drive the movable limit block 31 to translate. The cylinder 32 is arranged to push the core box block mounting plate 30 to translate, and the core making effect is more efficient and convenient.

[0030] In some embodiments, two cylinders 32 are used and symmetrically arranged on both sides of the core box block mounting plate 30. Due to the core box size limitation, it is most preferred to arrange the cylinders 32 on both sides of the core box block mounting plate 30. To meet different casting requirements, the number of cylinders 32 can be adjusted.

[0031] In some embodiments, the pumping blocks include: a cylinder liner hole pumping block 34 and a push rod hole core head pumping block 35; when making cores, the cylinder liner hole pumping block 34 and the push rod hole core head pumping block 35 are translated into place to ensure sand shooting molding, ensure the size and shape of the core head, and thus the core assembly meets the process requirements. To meet different casting requirements, the pumping blocks can be adjusted differently. When the cylinder 32 pushes the core box pumping block mounting plate 30 to translate, the core box pumping block mounting plate 30 drives the cylinder liner hole pumping block 34 and the push rod hole pumping block to translate, and the mold is closed after the translation into place.

[0032] In some embodiments, at least one guide hole 36 is provided on the core box block mounting plate 30; a guide rod 33 is inserted into the guide hole 36, so that the core box block mounting plate 30 can be translated along the guide rod 33. These settings determine the direction of translation of the core box block mounting plate 30.

[0033] In some embodiments, in order to better fix the guide rod 33, a fixing block 21 for connecting the guide rod 33 is also provided on the lower core box 20, one end of the guide rod 33 passes through the core box block mounting plate 30 and is fixed on the lower core box 20, and the other end of the guide rod 33 is fixed on the fixing block 21.

[0034] In some embodiments, the contact surface between the movable limit block 31 and the upper limit block 11 is an inclined surface. Such a setting is more conducive to guiding the mold closing and avoids the block being not pulled into place at the beginning, causing the upper core box 10 to collide after the mold is closed.

[0035] In some embodiments, the angle formed by the inclined plane and the horizontal plane is 55°-80°, at which time the abutting surfaces of the movable limit block 31 and the upper limit block 11 are slowly in contact, and the locking position is limited.

[0036] In some embodiments, the upper core box 10 is provided with a feed port 12 communicating with the mold cavity, and the feed port 12 is used for the casting material to enter.

[0037] Some embodiments further provide a cold core machine, comprising: a cold core box assembly 1; and a spraying device 2, which is connected to a feed port 12. Casting material is sprayed out from the spraying device 2, and enters a mold cavity formed by the upper core box 10 and the lower core box 20 through the feed port 12 to start casting.

[0038] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cold box assembly, characterized in that: include: The lower core box has a core pulling mechanism disposed on its upper portion, and the core pulling mechanism is suitable for driving the movable limit block to translate; An upper core box, the lower surface of which is provided with an upper limit block; as well as When the lower core box and the upper core box are molded together, the core pulling mechanism pushes the movable limit block to translate and abut against the upper limit block to limit the lower and upper core boxes.

2. The cold box assembly according to claim 1, characterized in that: The core pulling mechanism comprises: A core box block mounting plate, the outer side of which is fixed with the movable limit block; and A plurality of drawer blocks are arranged on one side of the core box drawer block mounting plate close to the cavity; and The cylinder has a piston rod connected to the core box block mounting plate to push the core box block mounting plate to drive the movable limit block to move in translation.

3. The cold box assembly according to claim 2, characterized in that: The cylinders are two and are symmetrically arranged on both sides of the core box block mounting plate.

4. The cold box assembly according to claim 2, characterized in that: The draw blocks include: a cylinder sleeve hole draw block and a push rod hole core head draw block; When the cylinder pushes the core box draw block installation plate to translate, the core box draw block installation plate drives the cylinder sleeve hole draw block and the push rod hole draw block to translate.

5. The cold box assembly according to claim 2, characterized in that: At least one guide hole is arranged on the core box block mounting plate; A guide rod is inserted into the guide hole so that the core box block mounting plate can be translated along the guide rod.

6. The cold box assembly according to claim 5, characterized in that: The lower core box is also provided with a fixing block for connecting the guide rod.

7. The cold box assembly according to claim 1, characterized in that: The contact surface between the movable limiting block and the upper limiting block is an inclined surface.

8. The cold box assembly according to claim 7, characterized in that: The angle formed by the inclined plane and the horizontal plane is between 55° and 80°.

9. The cold box assembly according to any one of claims 1 to 8, characterized in that: The upper core box is provided with a feed port communicated with the mold cavity.

10. A cold core machine, characterized in that: include: The cold box assembly according to claim 9; as well as The material spraying device is connected with the material feeding port.

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