An engine cylinder head blank forming mold

Abstract

This utility model discloses an engine cylinder head blank forming mold, relating to the field of forming molds. It includes a mold frame with four open sides. End movable molds are connected to the two end openings of the mold frame, and side movable molds are connected to the two side openings. Guide rods are welded to the four sides of the outer wall of the mold frame for sliding guidance of the end and side movable molds. Placement grooves for placing the casting cap sand core are provided on both sides of the top of the mold frame. An upwardly protruding positioning block is integrally formed at the bottom of the inner wall of the placement groove. Positioning slots corresponding to the positioning blocks are formed at the bottom of the two protruding parts of the casting cap. A pressing mechanism is installed on both sides of the top of the end movable mold. This utility model, by setting up the pressing mechanism, can limit the top of the casting cap sand core, thereby preventing the casting cap sand core from being pushed up by overflowing gas and ensuring the forming quality.

Description

Technical Field

[0001] This utility model relates to the field of molding dies, specifically a molding die for an engine cylinder head blank. Background Technology

[0002] Engine cylinder head forming molds generally consist of an external fixed mold frame, a movable mold, a combined sand core mold (or: an integrated sand core mold) and a casting cap sand core.

[0003] In the existing technology, each sand core is placed on the top of the base plate of the mold frame in a top-to-bottom order, and then the casting cap sand core is placed in. However, during the pouring of molten metal, the gas inside the mold will overflow, and after being heated by the molten metal, the overflow process is fluctuating. At this time, the casting cap sand core is prone to being pushed up, resulting in defective products. Utility Model Content

[0004] The purpose of this utility model is to provide an engine cylinder head blank forming mold in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an engine cylinder head blank forming mold, including a mold frame, the mold frame having an open structure on all four sides, an end movable mold being connected to the openings at both ends of the mold frame, and a side movable mold being connected to the openings on both sides of the mold frame, guide rods being welded to the four sides of the outer wall of the mold frame for sliding guidance of the end movable mold and the side movable mold, placement grooves for placing the casting cap sand core being opened on both sides of the top of the mold frame, an upwardly protruding positioning block being integrally formed at the bottom of the inner wall of the placement groove, and positioning slots being formed at the bottom of the protrusions on both sides of the casting cap being aligned with the positioning blocks, and a pressing mechanism being installed on both sides of the top of the end movable mold for pressing the top of both sides of the casting cap.

[0006] As a further embodiment of this utility model: the pressing mechanism includes a mounting bracket fixedly installed on both sides of the top of the mold frame. One end of the crossbar of the mounting bracket is integrally formed with a fixing plate. A screw is threadedly connected to the center of the fixing plate, and a handle is fixedly installed at the top of the screw.

[0007] As a further embodiment of this utility model: the pressing mechanism further includes a support frame rotatably mounted on the bottom end of the screw, and a pressing roller is rotatably mounted on the inner side of the vertical lug of the support frame.

[0008] As a further embodiment of this utility model: the outer circumference of the support frame is integrally formed with a protruding plate arranged parallel to the mounting frame, and the top of the end of the protruding plate away from the support frame is integrally formed with an upwardly protruding limiting rod, and the interior of the mounting frame is provided with a circular hole for the limiting rod to slide up and down.

[0009] As a further improvement of this utility model: the axis of the pressing roller is perpendicular to one end of the end movable mold.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By setting up a pressing mechanism, the top of the casting cap sand core can be limited, thereby avoiding the problem of the casting cap sand core being pushed up by overflowing gas and ensuring the molding quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the pressing mechanism of this utility model;

[0014] Figure 3 This is a schematic diagram of the rotating connection between the screw and the support frame of this utility model.

[0015] In the diagram: 1. Mold frame; 2. End movable mold; 3. Side movable mold; 4. Guide rod; 5. Mounting frame; 6. Placement slot; 7. Positioning block; 8. Fixing plate; 9. Screw; 10. Handle; 11. Support frame; 12. Pressure roller; 13. Protruding plate; 14. Limiting rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-3 In this embodiment of the present invention, an engine cylinder head blank forming mold includes a mold frame 1. The mold frame 1 has an open structure on all four sides. An end movable mold 2 is connected to the openings at both ends of the mold frame 1, and a side movable mold 3 is connected to the openings on both sides of the mold frame 1. Guide rods 4 are welded on the four sides of the outer wall of the mold frame 1 to guide the sliding of the end movable mold 2 and the side movable mold 3. Placement grooves 6 for placing the casting cap sand core are opened on both sides of the top of the mold frame 1. The bottom of the inner wall of the placement groove 6 is integrally formed with an upward protruding positioning block 7. The bottom of the protrusions on both sides of the casting cap is formed with positioning slots that are connected to the positioning blocks 7. A pressing mechanism is installed on both sides of the top of the end movable mold 2. The pressing mechanism is used to press the top of both sides of the casting cap.

[0018] In this embodiment: First, before pouring the molten metal, various sand cores (such as multiple air passage sand cores and multiple oil passage sand cores) are placed on the top of the mold base plate of the mold frame 1 in a bottom-up distribution order. Finally, the two protrusions on both sides of the pouring cap sand core are placed into the placement groove 6. At this time, the positioning groove at the bottom of the two protrusions on both sides of the pouring cap sand core is aligned with the positioning block 7, which restricts the pouring cap sand core to the current position. Then, the hydraulic push cylinder is activated, and the piston rod output ends of the four hydraulic push cylinders are fixedly connected to the outside of the two end movable molds 2 and the two side movable molds 3, respectively.

[0019] First, start the hydraulic push cylinders connected to the two end movable molds 2 to push the end movable molds 2 to the mold closing state. Then start the hydraulic push cylinders connected to the two side movable molds 3 to push the side movable molds 3 to the mold closing state.

[0020] Once the end movable mold 2 is in place, the pressing mechanism can be rotated and moved downwards to press down and limit the protrusions on both sides of the casting cap, thus preventing the problem of overflowing gas lifting the casting cap during the pouring of molten metal.

[0021] Please refer to this carefully. Figure 1 , Figure 2 and Figure 3 The pressing mechanism includes mounting brackets 5 fixedly installed on both sides of the top of the mold frame 1. One end of the horizontal bar of the mounting bracket 5 is integrally formed with a fixing plate 8. A screw 9 is threadedly connected to the center of the fixing plate 8. A handle 10 is fixedly installed at the top of the screw 9. The pressing mechanism also includes a support frame 11 rotatably installed at the bottom of the screw 9. A pressing roller 12 is rotatably installed on the inner side of the vertical ear of the support frame 11.

[0022] In this embodiment: During the mold closing process of the end movable mold 2, the end movable mold 2 drives the pressing mechanism to move synchronously. When the end movable mold 2 is fully closed, the pressing end of the pressing mechanism is located above the protrusions on both sides of the casting cap. At this time, by rotating the handle 10, the rotating handle 10 drives the screw 9 to rotate. The screw 9 rotates downward and pushes the support frame 11 to move downward synchronously. The support frame 11 then drives the pressing roller 12 to move downward synchronously until the outer periphery of the pressing roller 12 contacts the top of the protrusions on both sides of the casting cap sand core, thereby limiting the casting cap sand core and avoiding the problem of gas overflowing outward and lifting the casting cap sand core during the pouring of molten metal.

[0023] Please refer to this carefully. Figure 2 and Figure 3 The outer circumference of the support frame 11 is integrally formed with a protruding plate 13 that is parallel to the mounting frame 5. The top of the end of the protruding plate 13 away from the support frame 11 is integrally formed with an upwardly protruding limiting rod 14. The interior of the mounting frame 5 is provided with a circular hole for the limiting rod 14 to slide up and down.

[0024] In this embodiment: during the up-and-down movement of the support frame 11, the support frame 11 drives the limiting rod 14 to slide up and down along the round hole, so as to avoid the problem of the support frame 11 rotating with the screw 9.

[0025] Please refer to this carefully. Figure 2 and Figure 3 The axis of the pressing roller 12 is perpendicular to one end of the end movable mold 2.

[0026] In this embodiment: after the molten metal is poured and naturally cooled and formed, the four hydraulic cylinders move in the direction of the movement, driving the two end movable molds 2 and the two side movable molds 3 to open. At this time, the moving end movable molds 2 can be reset by the support pulling the pressing mechanism. At this time, the pressing roller 12 rotates under the friction force, without the need for manual release of the restriction.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A die for forming an engine cylinder head blank, comprising a die frame (1), wherein the die frame (1) has an open structure on all four sides, characterized in that, The mold frame (1) has end movable molds (2) connected to the openings at both ends, and side movable molds (3) connected to the openings on both sides. The mold frame (1) has guide rods (4) welded on the four sides of the outer wall for sliding guidance of the end movable molds (2) and side movable molds (3). The mold frame (1) has placement grooves (6) on both sides of the top for placing the sand core of the casting cap. The bottom of the inner wall of the placement groove (6) has an upwardly protruding positioning block (7). The bottom of the protrusions on both sides of the casting cap has a positioning slot that is connected to the positioning block (7). The top of the end movable mold (2) is equipped with a pressing mechanism, which is used to press the top of both sides of the casting cap.

2. The engine cylinder head blank forming mold according to claim 1, characterized in that, The pressing mechanism includes mounting brackets (5) fixedly installed on both sides of the top of the mold frame (1). One end of the crossbar of the mounting bracket (5) is integrally formed with a fixing plate (8). A screw (9) is threadedly connected to the center of the fixing plate (8). A handle (10) is fixedly installed at the top of the screw (9).

3. The engine cylinder head blank forming mold according to claim 2, characterized in that, The pressing mechanism also includes a support frame (11) rotatably mounted on the bottom end of the screw (9), and a pressing roller (12) is rotatably mounted on the inner side of the vertical ear of the support frame (11).

4. The engine cylinder head blank forming mold according to claim 3, characterized in that, The outer circumference of the support frame (11) is integrally formed with a protruding plate (13) arranged parallel to the mounting frame (5). The top of the end of the protruding plate (13) away from the support frame (11) is integrally formed with an upwardly protruding limiting rod (14). The interior of the mounting frame (5) is provided with a circular hole for the limiting rod (14) to slide up and down.

5. The engine cylinder head blank forming mold according to claim 4, characterized in that, The axis of the pressing roller (12) is perpendicular to one end of the end movable mold (2).

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