Automobile auxiliary frame core box

Abstract

The utility model discloses an automobile auxiliary frame core box which comprises an upper die and a lower die, the lower die comprises a forming cavity, a sand core body is formed in the forming cavity, the lower die is provided with a forming assembly, and a connecting part is formed on the forming assembly; when the forming assembly is closed, a forming structure used for forming the connecting part is formed, and the formed connecting part is limited at the same time. And when the forming assembly is opened, the formed connecting part is not limited. In the implementation process, when the sand core is formed, the forming assembly has the effect of additionally limiting the formed sand core body, and after the sand core is formed, when the mold integrally moves and the forming assembly is not opened, the sand core body can be stably kept in the forming cavity, so that the sand core body can be prevented from colliding with the wall surface of the core box; therefore, it can be guaranteed that the formed sand core body is prevented from being damaged by external force, the limitation can be relieved when the sand core body is opened, namely the protection effect is achieved, and demolding operation can be conducted on the sand core body.

Description

Technical Field

[0001] The present application relates to the technical field of mold manufacturing, in particular to a core box of an automobile subframe. Background Art

[0002] The core box is a process equipment for making sand into a core, which can be made of wood, plastic, metal or other materials. When designing a core box, the core box material and its structure are determined based on the characteristics of the core, production batch and production conditions. The manufacture of automobile subframes can usually use core boxes to make cores and form sand molds for casting.

[0003] The subframe can be regarded as the skeleton of the front and rear axles, and is a component of the front and rear axles. The subframe is not a complete frame, but a bracket that supports the front and rear axles and suspension, so that the axles and suspension are connected to the "main frame" through it. It is usually called "subframe". The subframe is generally provided with a connecting part for connection or support. When designing the existing subframe core box, this part is usually a design difficulty; for this reason, we propose an automobile subframe core box that can shape the connecting part and use its configuration to react to the entire sand core. Utility Model Content

[0004] The purpose of the present application is to provide a core box of an automobile subframe.

[0005] In order to achieve the above purpose, the technical solution adopted in the present application is: a core box of an automobile subframe, including an upper mold and a lower mold, the lower mold including a molding cavity, the molding cavity molding a sand core body, the lower mold is provided with a molding assembly, the molding assembly molds a connecting part; when the molding assembly is closed, a molding structure for molding the connecting part is formed, and at the same time, the molded connecting part is limited; when the molding assembly is opened, the limit on the molded connecting part is cancelled.

[0006] Preferably, the molding assembly includes a first molding part and a second molding part that are relatively arranged, and the first molding part and the second molding part are close to each other at the same time to form a molding structure of the connecting part. After the sand core body is molded, the first molding part and the second molding part move away from each other to separate from the sand core body.

[0007] Preferably, the first molding part and the second molding part are respectively provided with a cylinder, and the cylinder drives the two to move closer or farther away at the same time.

[0008] Preferably, a double-headed screw is provided at the position of the first molding part and the second molding part, and the first molding part and the second molding part are respectively connected to the threaded parts at both ends of the double-headed screw, and the double-headed screw is rotated to make the first molding part and the second molding part approach or move away at the same time.

[0009] As a preferred embodiment, the sand core body includes two arms arranged in a broken line shape, and the connecting portion is formed at the connection between one of the arms and the other arm; the connecting portion includes a plurality of connecting columns formed on the outer wall of the middle portion, and a corresponding number of forming grooves are provided at the closing portion of the first forming portion and the second forming portion, and the forming grooves are used to form the connecting columns.

[0010] Preferably, the number of the connecting columns and the forming grooves are both two, the formed arm body is cylindrical, and the two connecting columns are respectively formed on opposite sides of the arm body; one of the forming grooves is tilted upward when the forming assembly is closed.

[0011] Preferably, when the molding assembly is closed, the acute angle between the molding groove and the horizontal plane is between 30° and 60°.

[0012] Preferably, the molding cavity comprises a plurality of sub-cavities, and each of the sub-cavities is provided with the molding assembly.

[0013] Preferably, the molding cavity includes four sub-cavities, each of which is provided with the molding assembly; the corresponding molding cavity is formed with four corners, wherein the two sub-cavities corresponding to the two corners on one side form two sand core bodies, and the two connecting parts corresponding to the two sand core bodies are respectively located at the positions of the two corners of this side; the two sub-cavities on the other side form another two sand core bodies, and the connecting parts corresponding to the two sand core bodies are located in the middle of this side, and one of the arms of the two sand core bodies is respectively formed in the two corners of this side.

[0014] Preferably, the two molding assemblies corresponding to the two sand core bodies located in the middle cooperate with each other; the two first molding parts of the two molding assemblies are arranged in parallel and are jointly provided with a fifth cylinder, and the two second molding parts of the two molding assemblies are arranged in parallel and are jointly provided with a sixth cylinder.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] During molding, the molding assembly has the function of adding additional position limiting to the molded sand core body. After molding, when the mold moves as a whole, when the molding assembly is not opened, the sand core body can be stably maintained in the molding cavity, thereby preventing it from colliding with the wall of the core box or being directly affected by external forces, thereby ensuring the molded sand core body and preventing it from being deformed or damaged by external forces. At the same time, when the molding assembly is opened, this restriction, that is, this protective function, can be released, so that the sand core body can be demolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 A diagram of the state of some structures during the molding of sand cores.

[0019] Figure 3 yes Figure 2 State diagram of the unformed sand core.

[0020] Figure 4 yes Figure 2 Top view of the .

[0021] Figure 5 yes Figure 4 Section view cut along the dashed line.

[0022] Figure 6 It is a schematic diagram of the coordination of multiple active forming structures.

[0023] Figure 7 It is a schematic diagram of the structure of one of the sand core bodies produced using the present application.

[0024] In the figure: 1. lower mold; 2. first cylinder; 3. molding cavity; 4. first molding part; 5. second molding part; 6. second cylinder; 7. third cylinder; 8. fourth cylinder; 9. fifth cylinder; 10. first connecting plate; 11. sand core body; 11a connecting part; 12. molding groove part; 13. second connecting plate; 14. sixth cylinder. DETAILED DESCRIPTION

[0025] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0029] Example:

[0030] Reference Figures 1 to 7 The present embodiment provides a core box for a subframe of an automobile, comprising an upper mold and a lower mold 1, wherein the lower mold 1 comprises a molding cavity 3, wherein a sand core body 11 is molded in the molding cavity 3, and the lower mold 1 is provided with a molding assembly, wherein a connecting portion 11a is molded in the molding assembly; when the molding assembly is closed, a molding structure for molding the connecting portion 11a is formed, and the molded connecting portion 11a is limited at the same time; when the molding assembly is opened, the limit of the molded connecting portion 11a is cancelled. The connecting portion 11a is a part of the molded sand core body 11, and its molding structure is composed of the molding assembly, and the molding assembly can limit and release the limit of the connecting portion 11a at the same time when it is closed and opened. During molding, the molding assembly has the function of adding additional limit to the molded sand core body 11. After molding, when the mold moves as a whole, when the molding assembly is not opened, the sand core body 11 can be stably maintained in the molding cavity 3, thereby preventing it from colliding with the wall of the core box or being directly acted upon by external forces, thereby ensuring the molded sand core body 11 and preventing it from being deformed or damaged by external forces. At the same time, when the molding assembly is opened, this restriction, that is, this protective effect, can be released, so that the sand core body 11 can be demoulded.

[0031] like Figure 3 As shown, the molding assembly includes a first molding part 4 and a second molding part 5 which are arranged opposite to each other. The first molding part 4 and the second molding part 5 are close to each other at the same time to form a molding structure of the connecting part 11a. After the sand core body 11 is formed, the first molding part 4 and the second molding part 5 are separated from each other to separate from the sand core body 11. The first molding part 4 and the second molding part 5 obviously need to be provided with a driving device to control the movement. Two driving schemes are proposed below:

[0032] (1) The first forming part 4 and the second forming part 5 are respectively provided with a cylinder, and the cylinder drives the two to move closer or farther at the same time. Figure 3 The solution shown is directly controlled by the cylinder to open or close.

[0033] (2) A double-headed screw is provided at the positions of the first forming part 4 and the second forming part 5. The first forming part 4 and the second forming part 5 are respectively connected to the threaded parts at both ends of the double-headed screw. The double-headed screw is rotated to make the first forming part 4 and the second forming part 5 approach or move away from each other at the same time. The principle of making the first forming part 4 and the second forming part 5 on both sides move together or approach each other when the double-headed screw is rotated is easy to understand, so it will not be described in detail in this embodiment.

[0034] One of the sand core bodies 11 produced in this embodiment is as follows Figure 7 , Figure 5 As shown, it includes two arms arranged in a folded line shape, and the connecting portion 11a is formed at the connection between one arm and the other arm. Figure 7 As shown, the connecting portion 11a is closer to the arm body on the right side; the connecting portion 11a includes a plurality of connecting columns formed on the outer wall of the middle part thereof, and the closed part of the first forming portion 4 and the second forming portion 5 is provided with a corresponding number of forming grooves 12, and the forming grooves 12 are used to form the connecting columns. The forming grooves 12 are used to form connecting columns of a specific shape on the one hand, and on the other hand, after the sand enters, it needs to pass through the forming grooves 12 to enter the relatively closed space formed between the first forming portion 4 and the second forming portion 5, so as to form the following. Figure 7 Sand core shape shown.

[0035] like Figure 7 The number of the connecting posts and the forming grooves 12 shown are both two, but in fact they can also be three or four. This embodiment is described by taking two as an example. Figure 7 As shown, the formed arm body is cylindrical (approximately cylindrical), and two connecting columns are formed on opposite sides of the arm body; one of the forming grooves 12 is tilted upward when the forming assembly is closed. Preferably, when the forming assembly is closed, the acute angle between the forming groove 12 and the horizontal plane is between 30° and 60°. The advantage of the inclined setting of the forming groove 12 is that sand can more easily enter the forming groove 12. Figure 3 As shown, if the molding groove 12 is set horizontally, the sand needs to enter the gap at the bottom of the molding groove 12 first, and then penetrate into the molding groove 12. If the sand falls in too quickly and blocks the molding groove 12 all at once, it may cause insufficient sand to enter the molding component, and it is impossible to produce a qualified sand core body 11; while if the molding groove 12 is set vertically, the top of the molding groove 12 is higher, which is not conducive to the entry of sand, and at the same time, its bottom is easy to be close to or attached to the bottom surface of the molding cavity 3, so that the continuity of the sand core after molding cannot be guaranteed, so it is also easy to produce unqualified products. Therefore, in this embodiment, the molding groove is designed to be inclined, and the preferred inclination angle is 30° to 60°. A good yield rate can be guaranteed under this angle range.

[0036] like Figure 1As shown, the molding chamber 3 of this embodiment may include a plurality of sub-chambers, each of which is provided with a molding assembly, so that a plurality of sand cores can be produced simultaneously.

[0037] Reference Figure 1 The molding cavity 3 includes 4 sub-cavities, each of which is provided with a molding assembly; the corresponding molding cavity 3 is formed with four corners, wherein the two sub-cavities corresponding to the two corners on one side form two sand core bodies 11, and the two connecting parts 11a corresponding to the two sand core bodies 11 are respectively located at the positions of the two corners of the side; the two sub-cavities on the other side form another two sand core bodies 11, and the connecting parts 11a corresponding to the two sand core bodies 11 are located in the middle of the side, and one of the arms of the two sand core bodies 11 is respectively formed in the two corners of the side. The two molding assemblies corresponding to the two sand core bodies 11 located in the middle cooperate with each other; the two first molding parts 4 of the two molding assemblies are arranged in parallel and are jointly provided with the fifth cylinder 9, and the two second molding parts 5 of the two molding assemblies are arranged in parallel and are jointly provided with the sixth cylinder 14. Figure 1 As shown, the chamber in the upper right corner is Figure 2 The enlarged part in the figure shows that the corresponding forming assembly is provided with a first cylinder 2 and a second cylinder 6 for driving; the forming assembly corresponding to the sub-cavity in the upper left corner is provided with a third cylinder 7 and a fourth cylinder 8 for driving; the two forming assemblies corresponding to the two sub-cavities in the lower left corner and the lower right corner are relatively close, so as to save space and equipment cost, as shown in FIG. Figure 1 and Figure 6 As shown, the two first molding parts 4 and the two second molding parts 5 of the two molding components are connected by a first connecting plate 10 and a second connecting plate 13 respectively, and then a fifth cylinder 9 and a sixth cylinder 14 are respectively provided, so that a pair of cylinders can be saved and the two molding components can be positioned close to each other to save space.

[0038] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A core box of an automobile subframe, characterized in that: It comprises an upper die and a lower die, wherein the lower die comprises a molding cavity, wherein a sand core body is molded in the molding cavity, and the lower die is provided with a molding component, wherein a connecting portion is molded in the molding component; when the molding component is closed, a molding structure for molding the connecting portion is formed, and at the same time, the molded connecting portion is limited; when the molding component is opened, the limit on the molded connecting portion is cancelled.

2. The automobile subframe core box according to claim 1, characterized in that: The molding assembly includes a first molding part and a second molding part that are arranged opposite to each other. The first molding part and the second molding part are close to each other at the same time to form a molding structure of a connecting part. After the sand core body is molded, the first molding part and the second molding part are away from each other to separate from the sand core body.

3. The automobile subframe core box according to claim 2, characterized in that: The first molding part and the second molding part are respectively provided with a cylinder, and the cylinder drives the two to move closer or farther away at the same time.

4. The automobile subframe core box according to claim 2, characterized in that: A double-headed screw is provided at the position of the first forming part and the second forming part. The first forming part and the second forming part are respectively connected to the threaded parts at both ends of the double-headed screw. The double-headed screw is rotated to make the first forming part and the second forming part approach or move away at the same time.

5. The automobile subframe core box according to claim 2, characterized in that: The sand core body includes two arms arranged in a broken line shape, and the connecting portion is formed at the connection between one of the arms and the other arm; the connecting portion includes a plurality of connecting columns formed on the outer wall of the middle portion, and a corresponding number of forming grooves are provided at the closing portion of the first forming portion and the second forming portion, and the forming grooves are used to form the connecting columns.

6. The automobile subframe core box according to claim 5, characterized in that: The number of the connecting posts and the forming grooves are both two, the formed arm body is cylindrical, and the two connecting posts are respectively formed on opposite sides of the arm body; one of the forming grooves is tilted upward when the forming assembly is closed.

7. The automobile subframe core box according to claim 6, characterized in that: When the molding assembly is closed, the acute angle between the molding groove and the horizontal plane is between 30° and 60°.

8. The automobile subframe core box according to claim 2, characterized in that: The molding cavity comprises a plurality of sub-cavities, and each of the sub-cavities is provided with the molding assembly.

9. The automobile subframe core box according to claim 5, characterized in that: The molding cavity includes four sub-cavities, each of which is provided with the molding assembly; the corresponding molding cavity is formed with four corners, wherein the two sub-cavities corresponding to the two corners on one side form two sand core bodies, and the two connecting parts corresponding to the two sand core bodies are respectively located at the positions of the two corners of this side; the two sub-cavities on the other side form another two sand core bodies, and the connecting parts corresponding to the two sand core bodies are located in the middle of this side, and one of the arms of the two sand core bodies is respectively molded in the two corners of this side.

10. The automobile subframe core box according to claim 9, characterized in that: The two molding assemblies corresponding to the two sand core bodies located in the middle cooperate with each other; the two first molding parts of the two molding assemblies are arranged in parallel and are jointly provided with a fifth cylinder, and the two second molding parts of the two molding assemblies are arranged in parallel and are jointly provided with a sixth cylinder.

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