A low-pressure casting mold for a box

Abstract

The utility model relates to a low-pressure casting mold for a box body, comprising an upper mold, a lower mold, a riser pipe and a cylinder slider. The upper mold is placed on the top of the lower mold. When the upper mold and the lower mold are closed, a cavity for shaping a casting is formed. The bottom of the lower mold is provided with a riser pipe connected to the cavity. The outer side wall of the lower mold is provided with a connecting groove for connecting the cylinder slider, and the cylinder slider is connected to the cylinder slider through a positioning component. The utility model relates to the technical field of engine box production. The low-pressure casting mold for a box body can be used to connect the cylinder slider with the lower mold through the positioning component, which can effectively reduce the processing difficulty of the upper mold, thereby reducing the production cost of the low-pressure casting mold for the box body, and while the positioning component fixes the cylinder slider, it can also be used for positioning when the upper mold and the lower mold are closed, thereby further improving the practicality of the positioning component.

Description

Technical Field

[0001] The utility model relates to the technical field of engine case production, in particular to a case low-pressure casting mould. Background Art

[0002] The engine case of a motor vehicle is an important part of the automobile engine. Whether its processing quality can be guaranteed during its processing and manufacturing process has a very important impact on the running quality of the entire automobile. In the structure of the automobile engine, the case bears the role of the skeleton and basic parts. Only by ensuring the quality and manufacturing process of the case can the crankshaft, connecting rod, cylinder and other components be in the correct position during normal operation. It plays a very important role in the installation, lubrication, cooling and ventilation of various parts and auxiliary systems in the engine.

[0003] According to a hydrogen fuel engine case casting mold disclosed in Chinese patent publication No. CN219004546U, the utility model discloses a hydrogen fuel engine case casting mold, including an upper mold, a lower mold, a liquid riser and a cylinder slider, wherein the upper mold is installed above the crucible, the lower mold is arranged above the upper mold, the edge of the lower mold is fitted and connected with the edge of the upper mold, the upper mold is provided with a protrusion identical to the casting, the lower mold is provided with a groove matching the casting, when the edge of the upper mold is fitted and connected with the edge of the lower mold, the protrusion and the groove form a first cavity; the liquid riser runs through the upper mold and is connected with the first cavity; the cylinder slider is nested on the outer wall of the lower mold, and the application is used for low-pressure casting of the hydrogen fuel engine case. The hydrogen fuel engine case formed by low-pressure casting has high quality, the product has better air tightness, the casting has dense structure and high mechanical properties; at the same time, the low-pressure casting has a higher degree of automation, which effectively improves the production efficiency of the hydrogen fuel engine case.

[0004] According to the above patent, a cylinder slider is provided in the lower mold, and is positioned and connected to the upper mold through a positioning column. Its main purpose is to ensure that the cylinder slider does not deviate during the casting process. However, the use of the positioning column to connect the cylinder slider to the upper mold requires additional grooves on the inner wall of the upper mold to cooperate with the cylinder slider, which increases the mold opening cost and reduces the mold opening efficiency. Utility Model Content

[0005] According to the shortcomings of the prior art, the purpose of the utility model is to provide a low-pressure casting mold for a box body, so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A box low-pressure casting mold includes an upper mold, a lower mold, a rising pipe and a cylinder slider. The upper mold is placed on the top of the lower mold. When the upper mold and the lower mold are closed, a cavity for shaping the casting is formed. The bottom of the lower mold is provided with a rising pipe connected to the cavity. The outer side wall of the lower mold is provided with a connecting groove for connecting the cylinder slider and is connected to the cylinder slider through a positioning component.

[0008] Furthermore, the positioning assembly includes a positioning pin and a limit block. The top sides of the cylinder slider are fixedly connected to the limit blocks. The top of the limit block is provided with a round hole and a positioning pin is inserted. The bottom of the upper mold and the top of the lower mold are provided with slots for accommodating the positioning pin.

[0009] Furthermore, an inner wall of the slot in the lower die is provided with an internal thread, and an outer wall at one end of the locating pin is processed with an external thread that is threadably connected to the slot.

[0010] Furthermore, a relief groove for accommodating the limit block is provided on the top of the lower mold, so that when the limit block is placed in the relief groove, the top of the limit block is flush with the top of the lower mold.

[0011] Furthermore, the outer side wall of the lower die is provided with a notch connected to the avoidance groove for laterally withdrawing the cylinder slider.

[0012] Furthermore, a positioning ring is fixedly connected to the middle of the positioning pin, and the limiting block is located at the top of the circular hole and is provided with a circular groove for placing the positioning ring.

[0013] In summary, the utility model includes at least one of the following beneficial technical effects:

[0014] 1. The box low-pressure casting mold can be used to connect the oil cylinder slider with the lower mold through the provided positioning assembly, which can effectively reduce the processing difficulty of the upper mold, thereby reducing the production cost of the box low-pressure casting mold, and while the positioning assembly fixes the oil cylinder slider, it can also be used for positioning when the upper mold and the lower mold are closed, thereby further improving the practicality of the positioning assembly;

[0015] 2. This low-pressure casting mold for a box body is provided with a locating ring in the middle of the locating pin. The force generated when the locating pin is threadedly connected to the lower mold can be used to press the limit block with the locating ring, so that the limit block is firmly installed in the locating groove. It is used to make the cylinder slider and the lower mold more stable after installation to avoid looseness between the cylinder slider and the lower mold and gaps that lead to leakage of metal fluid. It can effectively improve the shaping accuracy of the box body and reduce the difficulty of subsequent burr processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a box low-pressure casting mold.

[0018] Figure 2 The utility model is a structural schematic diagram of a positioning component in a low-pressure casting mold of a box.

[0019] Figure 3 The utility model is a schematic structural diagram of a lower mold in a box low-pressure casting mold.

[0020] Figure 4 The utility model is a schematic diagram of the internal structure of the lower mold in a box low-pressure casting mold.

[0021] Figure 5 The utility model is a structural schematic diagram of a cylinder slider in a box low-pressure casting mold.

[0022] In the figure, 1, upper mold; 2, lower mold; 3, liquid riser; 4, cylinder slider; 5, connecting groove; 6, positioning assembly; 61, positioning pin; 62, limit block; 7, round hole; 8, slot; 9, avoidance groove; 10, notch; 11, positioning ring; 12, circular ring groove. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Example:

[0025] Reference Figure 1 - Figure 5 The utility model discloses a box low-pressure casting mold, including an upper mold 1, a lower mold 2, a liquid riser 3 and a cylinder slider 4. The upper mold 1 is placed on the top of the lower mold 2. When the upper mold 1 and the lower mold 2 are closed, a cavity for shaping the casting is formed. The bottom of the lower mold 2 is provided with a liquid riser 3 connected to the cavity. The outer side wall of the lower mold 2 is provided with a connecting groove 5 for connecting the cylinder slider 4, and is connected to the cylinder slider 4 through a positioning component 6.

[0026] In this embodiment, when in use, the cylinder slider 4 is first connected to the lower mold 2, and then the positioning assembly 6 is used to fix the cylinder slider 4 and the lower mold 2 together, and then the upper mold 1 and the lower mold are closed to form a cavity for shaping between the upper mold 1 and the lower mold 2, and finally the metal fluid in the crucible is input into the lower mold 2 through the riser tube 3 by low pressure, and then the solution is shaped by the cavity formed after the upper mold 1 and the lower mold 2 are closed, which can be used for rapid shaping of the box.

[0027] By fixing the oil cylinder slide block 4 with the positioning assembly 6, the number of openings of the upper mold can be effectively reduced, thereby reducing the difficulty of processing the upper mold 1, and can also improve the processing efficiency of the upper mold 1 and reduce the production cost of the mold.

[0028] And observe Figure 4 It can be found that after the metal fluid fills the cavity, the excess metal fluid will enter the cavity formed between the cylinder slider 4 and the lower mold 2 through the through hole set on the inner wall of the lower mold 2, which is used to simultaneously cast the outer wall of the box body, thereby improving the practicality of the mold and improving the production efficiency of the box body.

[0029] In a further preferred embodiment of the present invention, Figure 2 and Figure 5 As shown, the positioning assembly 6 includes a positioning pin 61 and a limit block 62. The limit blocks 62 are fixedly connected to both sides of the top of the cylinder slider 4. A round hole 7 is provided on the top of the limit block 62, and the positioning pin 61 is inserted therein. The bottom of the upper mold 1 and the top of the lower mold 2 are provided with a slot 8 for accommodating the positioning pin 61.

[0030] In this embodiment, because the space inside the cylinder slider 4 cooperates with the connecting groove 5 of the lower mold 2 to form a cavity for shaping the outer wall of the box body, it is necessary to keep the cylinder slider 4 stable after being connected to the lower mold 2 to prevent the metal fluid from pushing the cylinder slider 4 open and leaking when entering the cavity, affecting the production of the box body and creating safety hazards.

[0031] So observe Figure 2 It can be found that the limit blocks 62 are connected to both sides of the top of the cylinder slide block 4. Figure 5 and Figure 2 It can be found that a circular hole 7 is opened on the top of the limit block 62, and both the upper mold 1 and the lower mold 2 are provided with a slot 8 for placing the positioning pin 61. After the cylinder slider 4 is installed in the connecting groove 5, the positioning pin 61 can be used to pass through the circular hole 7 and inserted into the slot 8 of the lower mold 2 to fix the cylinder slider 4 and the lower mold 2, which can effectively prevent the cylinder slider 4 from being squeezed by the metal fluid and loosening, resulting in leakage of high-temperature metal fluid.

[0032] The setting of the positioning pin 61 can not only fix the cylinder slider 4 and the lower mold 2, but also can be used for positioning the upper mold 1 and the lower mold 2 when they are closed after the cylinder slider 4 is fixed, so that the connection between the upper mold 1 and the lower mold 2 is more stable.

[0033] In a further preferred embodiment of the present invention, Figure 2 and Figure 5 As shown, the inner wall of the slot 8 in the lower die 2 is provided with an internal thread, and the outer side wall of one end of the locating pin 61 is processed with an external thread threadedly connected to the slot 8 .

[0034] In this embodiment, by processing an internal thread in the slot 8 of the lower mold 2 and processing an external thread on the outer wall of the locating pin 61, the connection between the locating pin 61 and the lower mold 2 can be made more stable, thereby improving the stability of the upper mold 1, the lower mold 2 and the cylinder slider 4 after installation.

[0035] In a further preferred embodiment of the present invention, Figure 3 As shown, a relief groove 9 for accommodating the limit block 62 is provided on the top of the lower mold 2 , so that when the limit block 62 is placed in the relief groove 9 , the top of the limit block 62 is flush with the top of the lower mold 2 .

[0036] In this embodiment, in order to reduce the shaping burrs of the casting, the mold closing progress of the shaping mold needs to be higher, so the contact surface must be flat when the upper mold 1 and the lower mold 2 are closed. Because the oil cylinder slide block 4 is provided with a limit block 62 stably connected to the lower mold 2, the upper mold 1 and the lower mold 2 will be blocked by the limit block 62 when closing the mold, resulting in a gap, which affects the accuracy of the closing mold.

[0037] So observe Figure 3 It can be found that an avoidance groove 9 for accommodating the limit block 62 is opened on the top of the lower mold 2, so that when the cylinder slider 4 is installed in the connecting groove 5, the avoidance groove 9 is used to accommodate the limit block 62, which can effectively avoid the contact between the limit block 62 of the cylinder slider 4 and the upper mold 1 and affect the mold closing accuracy of the upper mold 1 and the lower mold 2, and can effectively reduce the size of the burrs after the box is shaped, thereby improving the shaping accuracy of the box.

[0038] In a further preferred embodiment of the present invention, Figure 3 As shown, the outer side wall of the lower die 2 is provided with a notch 10 connected to the avoidance groove 9 for horizontally withdrawing the cylinder slider 4.

[0039] In the present embodiment, because a cavity for shaping the side wall of the box body is formed between the cylinder slider 4 and the connecting groove 5 of the lower mold 2, and the cylinder slider 4 is a hollow square grid design, the cylinder slider 4 cannot move upward and separate from the lower mold 2 after the metal fluid entering the cavity between the cylinder slider 4 and the lower mold 2 is cooled and shaped. At the same time, the avoidance groove 9 of the lower mold 2 limits the limit block 62 of the cylinder slider 4, affecting the demolding of the cylinder slider 4.

[0040] So observe Figure 3 It can be found that a notch 10 connected to the avoidance groove 9 is opened on the outer wall of the lower mold 2 near the avoidance groove 9. By setting the notch 10, the cylinder slider 4 can be pulled out laterally during demolding, thereby making the demolding of the cylinder slider 4 simpler and more convenient, making the use of the low-pressure casting mold of the box more reasonable, and making demolding more convenient and simpler, which can effectively improve the production efficiency of the box.

[0041] In a further preferred embodiment of the present invention, Figure 2 and Figure 5 As shown, a positioning ring 11 is fixedly connected to the middle of the positioning pin 61 , and the limiting block 62 is located at the top of the circular hole 7 and is provided with a circular groove 12 for placing the positioning ring 11 .

[0042] In this embodiment, because the cylinder slider 4 and the lower mold 2 are separately arranged and need to be separated during demolding, the coordination of the assembly progress between the cylinder slider 4 and the lower mold 2 is particularly important, which will increase the processing difficulty of the cylinder slider 4 and the lower mold 2, thereby increasing the production cost of the box low-temperature casting mold.

[0043] If the height of the cylinder slider 4 is greater than the accommodation height of the connecting groove 5 opened on the outer side wall of the lower mold 2, the top of the cylinder slider 4 will protrude from a part of the top of the lower mold 2, which will cause the upper mold 1 and the lower mold 2 to be blocked by the cylinder slider 4 when they are closed, resulting in an increase in the closing gap between the upper mold 1 and the lower mold 2, allowing the solution to penetrate along the gap, resulting in large burrs after the box blank is shaped, increasing the difficulty of subsequent processing, thereby affecting the production efficiency of the box.

[0044] When the height of the cylinder slider 4 is less than the accommodating height of the connecting groove 5, the cylinder slider 4 placed in the connecting groove 5 cannot be squeezed and fixed by the upper mold 1 and the lower mold 2, which will cause the cylinder slider 4 to shake due to looseness, affecting the installation stability of the cylinder slider 4, and making it impossible for the cylinder slider 4 to be in close contact with the lower mold 2, thereby causing a gap between the cylinder slider 4 and the lower mold 2, causing metal fluid to leak. The leaked metal fluid will contact the surfaces of the cylinder slider 4 and the lower mold 2 that are not coated with the release agent, causing the fluid to stick to the surfaces of the cylinder slider 4 and the lower mold 2 after cooling and shaping, which will increase the difficulty of demolding. Moreover, large burrs will be formed after demolding, making it more difficult to grind in subsequent processing, thereby affecting the production efficiency of the box.

[0045] So observe Figure 5 It can be found that an annular groove 12 is provided at the opening of the circular hole 7 at the top of the limit block 62, and a positioning ring 11 that fits with the annular groove 12 is provided in the middle of the positioning pin 61, so that during the installation process of the positioning pin 61, the thread force between the external thread of the positioning pin 61 and the internal thread of the slot 8 of the lower mold 2 is used to make the positioning ring 11 squeeze the inner wall of the annular groove 12 downward, thereby moving the limit block 62 downward until the limit block 62 is tightly fitted with the avoidance groove 9, and the installation of the cylinder slider 4 and the lower mold 2 is completed, which can ensure the installation stability between the cylinder slider 4 and the lower mold 2.

[0046] The method of using the positioning ring 11 to extrude the annular groove 12 to fix the cylinder slider 4 can reduce the production accuracy requirements for the cylinder slider 4 and the installation and matching accuracy requirements between the cylinder slider 4 and the lower mold 2, thereby reducing the production difficulty of the lower mold 2 and the cylinder slider 4, thereby reducing production costs.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A low-pressure casting mold for a box, comprising an upper mold (1), a lower mold (2), a liquid riser (3) and a cylinder slider (4), characterized in that: An upper mold (1) is placed on the top of the lower mold (2); when the upper mold (1) and the lower mold (2) are closed, a cavity for molding a casting is formed; a riser pipe (3) connected to the cavity is provided at the bottom of the lower mold (2); a connecting groove (5) for connecting to a cylinder slider (4) is provided on the outer side wall of the lower mold (2), and the cylinder slider (4) is connected via a positioning assembly (6).

2. A box low-pressure casting mold according to claim 1, characterized in that: The positioning assembly (6) comprises a positioning pin (61) and a limiting block (62); both sides of the top of the oil cylinder slider (4) are fixedly connected to the limiting blocks (62); a round hole (7) is provided on the top of the limiting block (62) and a positioning pin (61) is inserted therein; a slot (8) for accommodating the positioning pin (61) is provided on the bottom of the upper die (1) and the top of the lower die (2).

3. A box low-pressure casting mold according to claim 2, characterized in that: The inner wall of the slot (8) in the lower mold (2) is provided with an internal thread, and the outer wall of one end of the positioning pin (61) is processed with an external thread which is threadedly connected to the slot (8).

4. A box low-pressure casting mold according to claim 2, characterized in that: The top of the lower mold (2) is provided with an avoidance groove (9) for accommodating the limit block (62), so that when the limit block (62) is placed in the avoidance groove (9), the top of the limit block (62) is flush with the top of the lower mold (2).

5. A box low-pressure casting mold according to claim 4, characterized in that: The outer side wall of the lower die (2) is provided with a notch (10) which is in communication with the avoidance groove (9) and is used for horizontally withdrawing the oil cylinder slide block (4).

6. A box low-pressure casting mold according to claim 2, characterized in that: A positioning ring (11) is fixedly connected to the middle of the positioning pin (61), and a circular groove (12) for placing the positioning ring (11) is formed on the top of the limiting block (62) located at the circular hole (7).

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