Automobile part casting mold and using method thereof

Abstract

The invention provides an automobile part casting mold and a using method thereof applied to the technical field of casting molds, and the automobile part casting mold comprises a lower casting mold body, an upper casting mold body, a cooling water tank, an overflow opening, a lower closed pipe shell, an upper closed pipe shell and a resistance increasing groove. The pressure is applied to the casting liquid in the mold cavity, the casting liquid is extruded out of the overflow opening, the overflowing casting liquid enters a pipeline formed by the lower closed pipe shell and the upper closed pipe shell from the overflow opening, cooling water in the cooling water tank is adopted for cooling the casting liquid in the pipeline, blockage is formed after the casting liquid is cooled and solidified, and the casting liquid is discharged out of the mold cavity. And therefore, a pipeline formed by combining the lower closed pipe shell and the upper closed pipe shell is closed, continuous discharge of casting liquid is blocked, the casting liquid in the mold cavity flows towards other overflow ports, the filling effect of the casting liquid on the mold cavity is effectively improved, and the integrity of casting accessories is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of casting molds, and in particular to an automobile parts casting mold and a method for using the same. Background Art

[0002] Auto parts are unit parts for assembling the whole car, and are also products that provide services for the whole car. Auto parts are mostly manufactured by casting. The casting mold is generally composed of an upper mold and a lower mold. After the upper mold is combined with the lower mold, the melted casting liquid is poured into the mold. The casting liquid slowly fills the mold cavity, and then cools and shapes to obtain the accessories.

[0003] The specification of Chinese invention patent CN202210365461.3 discloses "A top-injection casting mold", including an upper mold, a lower mold and a pouring channel, a cavity for molding a workpiece is provided between the upper mold and the lower mold, a pouring port is provided on the pouring channel, and the pouring channel is suitable for connecting the pouring port and the cavity, characterized in that the pouring channel includes a sprue and a runner, the pouring port is connected to the runner through the sprue, the runner is connected upward with a slow-flow cavity, the slow-flow cavity is connected to the cavity, and the slow-flow cavity is suitable for storing part of the casting liquid. The casting mold of this application can improve casting efficiency and casting quality.

[0004] When existing casting molds are used to manufacture automotive parts with complex structures, it is easy for the casting liquid to miss some of the finer spaces in the mold cavity during the process of filling the mold cavity with the casting liquid, resulting in missing parts structure. In order to completely fill the mold cavity, the amount of casting liquid used is usually greater than the internal space of the mold cavity. Therefore, excess casting liquid will overflow during the casting process, but the overflowing casting liquid cannot be controlled. It is common that some overflow ports discharge relatively more casting liquid, while other overflow ports have no casting liquid discharged, which is still easy to cause missing parts structure. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the overflow of casting liquid cannot be controlled, and it often happens that some overflow ports discharge relatively more casting liquid, while other overflow ports have no casting liquid discharged, which is still easy to cause the missing of accessory structure.

[0006] In order to solve the above problems, the present invention provides a casting mold for automobile parts, comprising a casting lower mold and a casting upper mold correspondingly connected to the top of the casting lower mold, an injection port is provided in the middle of the casting upper mold, a pressure mold is movably connected to the top of the injection port, a pressure column is fixedly connected to the bottom of the pressure mold, and the pressure column is plugged with the injection port, a cooling water tank is provided on the periphery of the top of the casting lower mold, and an overflow port is provided between the upper port of the casting lower mold and the top of the cooling water tank;

[0007] The casting lower mold is set as a concave mold, and the casting upper mold is set as a convex mold. The bottom periphery of the casting upper mold is fixedly connected with a closed convex mold, and the closed convex mold is clamped with the upper opening of the cooling water tank. The outside of the overflow port is fixedly extended outward with a lower closing tube shell, and the lower surface of the closed convex mold is provided with an upper closing tube shell. The lower closing tube shell is clamped and combined with the upper closing tube shell, and the inner surface of the lower closing tube shell is provided with resistance increasing grooves at equal intervals.

[0008] In the above-mentioned automobile parts casting mold, the lower tube shell and the upper tube shell are combined outside the overflow port to form a pipeline for the casting liquid to overflow. After the casting liquid is cooled and solidified, a blockage is formed, thereby closing the pipeline formed by the lower tube shell and the upper tube shell. The subsequent casting liquid is no longer squeezed out from the overflow port, but flows in the direction of other overflow ports, thereby effectively improving the filling effect of the casting liquid on the mold cavity, and then effectively improving the integrity of the casting accessories.

[0009] As a further improvement of the present application, water filling grooves are provided at both ends of the cooling water trough, and the two water filling grooves are respectively connected with water filling pipes and drainage pipes. The water filling pipes and drainage pipes are utilized to realize rapid water filling and discharge of the cooling water trough, and the flowing cooling water effectively improves the cooling effect on the casting liquid.

[0010] As a further improvement of the present application, an end of the closed punch away from the upper tube shell is fixedly connected to a vent hole, and the outer end of the lower tube shell is fixedly connected to a connecting pipe, the connecting pipe is bent in an L shape, and one end of the connecting pipe is plugged into the bottom end of the vent hole. By plugging the connecting pipe into the vent hole, air between the lower tube shell and the upper tube shell can be discharged, which facilitates the casting liquid to enter the lower tube shell and the upper tube shell.

[0011] As a further improvement of the present application, a fitting groove is provided at the bottom of the lower tube shell, the fitting groove is connected to the bottom of the resistance increasing groove, and a blocking piece is embedded in the fitting groove, the fitting groove is connected to the resistance increasing groove, so that the cooling water in the cooling water tank passes through the resistance increasing groove and contacts the overflowed casting liquid, thereby accelerating the cooling and solidification of the casting liquid, and the blocking piece closes the fitting groove to control the entry of cooling water.

[0012] As another improvement of the present application, a convex rib is fixedly connected to the upper surface of the plugging piece, and the convex rib is plugged into the resistance-increasing groove. The convex rib effectively improves the sealing effect of the resistance-increasing groove and effectively improves the water-retaining effect of the plugging piece.

[0013] As another improved supplement of the present application, the four corners of the plugging piece are fixedly connected with temperature-sensitive stirrups, and the top of the temperature-sensitive stirrups is fixedly connected to the fitting groove. After the casting liquid enters the lower fitting tube shell, the high temperature of the casting liquid affects the temperature-sensitive stirrups, thereby causing the temperature-sensitive stirrups to deform and push open the plugging piece, so that the cooling water passes through the resistance-increasing groove and contacts the overflowing casting liquid.

[0014] As another improvement supplement of the present application, the temperature-sensitive hoop reinforcement is set in a U-shape before deformation, and is set in a U-shape after deformation, and the temperature-sensitive hoop reinforcement is made of shape memory alloy material. The temperature-sensitive hoop reinforcement is controlled to change from U-shape to V-shape, which effectively improves the opening and closing effect of the plugging piece. The temperature-sensitive hoop reinforcement made of shape memory alloy material has better temperature sensing effect.

[0015] A method for using a casting mold for automobile parts, characterized in that:

[0016] Step 1: Select the lower casting mold and the upper casting mold required for the casting, close the upper casting mold with the lower casting mold, and inject the casting liquid into the mold cavity from the injection port until the casting liquid fills the injection port;

[0017] Step 2: insert the pressure column of the pressure mold into the injection port, apply pressure to the casting liquid in the injection port, squeeze the casting liquid in the injection port into the mold cavity between the lower casting mold and the upper casting mold, and squeeze out the excess casting liquid in the mold cavity from the overflow port;

[0018] Step three: the casting liquid squeezed out from the overflow port enters the pipeline space of the lower combined tube shell and the upper combined tube shell, and the casting liquid is cooled by heat transfer through the lower combined tube shell and the cooling water in the cooling water tank. After the casting liquid is cooled and solidified, the pipeline space is blocked, and the subsequent casting liquid is no longer squeezed out from the overflow port, but flows toward other overflow ports.

[0019] In summary, when casting automobile accessories, the present invention combines the casting upper mold with the casting lower mold, and the casting liquid is injected into the mold cavity from the injection port until the casting liquid fills the injection port, and then the pressure column of the pressure mold is inserted into the injection port to apply pressure to the casting liquid in the injection port, so that the excess casting liquid in the mold cavity is squeezed out from the overflow port, thereby effectively improving the filling effect of the casting liquid, and the overflowed casting liquid enters the pipeline formed by the lower combined tube shell and the upper combined tube shell from the overflow port, and the cooling water in the cooling water tank is used to cool the casting liquid in the pipeline. After the casting liquid is cooled and solidified, a blockage is formed, thereby closing the pipeline formed by the lower combined tube shell and the upper combined tube shell, blocking the continued discharge of the casting liquid, and causing the casting liquid in the mold cavity to flow toward other overflow ports, thereby effectively improving the filling effect of the casting liquid on the mold cavity, and further improving the integrity of the cast accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present application;

[0021] Figure 2 This is a three-dimensional structural diagram of the lower casting mold in the first embodiment of the present application;

[0022] Figure 3 This is a bottom-up stereoscopic structural diagram of the casting upper mold in the first embodiment of the present application;

[0023] Figure 4 This is a top-view stereoscopic structural diagram of the casting upper mold in the first embodiment of the present application;

[0024] Figure 5 This is a demonstration diagram of the downward pressing movement of the pressure mold in the first embodiment of the present application;

[0025] Figure 6 This is an enlarged view of the lower tube shell of the first embodiment of the present application;

[0026] Figure 7 This is a demonstration diagram of the cooling and solidification of the casting liquid in the first embodiment of the present application;

[0027] Figure 8 This is a bottom-up stereoscopic structural diagram of a drainage pipeline in a second embodiment of the present application;

[0028] Fig. 9 This is a three-dimensional structural diagram of the plugging piece according to the second embodiment of the present application.

[0029] Description of the numbers in the figure:

[0030] 101. Casting lower mold; 102. Casting upper mold; 103. Injection port; 104. Pressure mold; 105. Pressure column; 2. Cooling water trough; 201. Closed punch; 202. Water injection trough; 203. Water injection pipeline; 204. Drainage pipeline; 3. Overflow port; 301. Lower combined tube shell; 302. Upper combined tube shell; 303. Resistance increasing groove; 304. Exhaust hole; 305. Connecting pipe; 306. Gas collecting notch; 4. Fitting groove; 401. Plug piece; 402. Temperature sensitive stirrup. DETAILED DESCRIPTION

[0031] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0032] The first implementation method:

[0033] Figures 1 to 7FIG. 1 shows a casting mold for automobile parts, comprising a casting lower mold 101 and a casting upper mold 102 correspondingly connected to the top of the casting lower mold 101, an injection port 103 is provided in the middle of the casting upper mold 102, a pressure mold 104 is movably connected to the top of the injection port 103, a pressure column 105 is fixedly connected to the bottom of the pressure mold 104, and the pressure column 105 is plugged with the injection port 103, a cooling water trough 2 is provided on the top periphery of the casting lower mold 101, and an overflow port 3 is provided between the upper port of the casting lower mold 101 and the top of the cooling water trough 2, the casting lower mold 101 is set as a concave mold, the casting upper mold 102 is set as a convex mold, and the bottom of the casting upper mold 102 is A closed punch 201 is fixedly connected to the periphery, and the closed punch 201 is clamped with the upper opening of the cooling water trough 2. A lower tube shell 301 is fixedly extended outward from the outside of the overflow port 3. An upper tube shell 302 is provided on the lower surface of the closed punch 201. The lower tube shell 301 and the upper tube shell 302 are clamped and assembled, and resistance-increasing grooves 303 are equidistantly provided on the inner surface of the lower tube shell 301. Water injection grooves 202 are provided at both ends of the cooling water trough 2. The two water injection grooves 202 are respectively plugged with water injection pipelines 203 and drainage pipelines 204. The water injection pipelines 203 and drainage pipelines 204 are used to realize rapid water injection and drainage of the cooling water trough 2, and the flowing cooling water effectively improves the cooling effect on the casting liquid.

[0034] A method for using a casting mold for automobile parts,

[0035] Step 1: Select the lower casting mold 101 and the upper casting mold 102 required for the casting, close the upper casting mold 102 with the lower casting mold 101, and inject the casting liquid into the mold cavity from the injection port 103 until the casting liquid fills the injection port 103;

[0036] Step 2: insert the pressure column 105 of the pressure mold 104 into the injection port 103, apply pressure to the casting liquid in the injection port 103, squeeze the casting liquid in the injection port 103 into the mold cavity between the lower casting mold 101 and the upper casting mold 102, and squeeze the excess casting liquid in the mold cavity out from the overflow port 3;

[0037] Step three: the casting liquid squeezed out from the overflow port 3 enters the pipe space formed by the combination of the lower tube shell 301 and the upper tube shell 302. The casting liquid is cooled by heat transfer through the lower tube shell 301 and the cooling water in the cooling water tank 2. After the casting liquid is cooled and solidified, the pipe space is blocked. Subsequently, the casting liquid is no longer squeezed out from the overflow port 3, but flows toward other overflow ports 3.

[0038] The upper casting mold 102 is molded together with the lower casting mold 101, and the casting liquid is injected into the mold cavity from the injection port 103 until the casting liquid fills the injection port 103, and then the pressure column 105 of the pressure mold 104 is inserted into the injection port 103 to apply pressure to the casting liquid in the injection port 103, so that the excess casting liquid in the mold cavity is squeezed out from the overflow port 3, thereby effectively improving the filling effect of the casting liquid, and the overflowed casting liquid enters the pipeline formed by the lower combined tube shell 301 and the upper combined tube shell 302 from the overflow port 3 The cooling water in the cooling water tank 2 is used to cool the casting liquid in the pipeline. When the casting liquid enters the lower tube shell 301, part of the casting liquid enters the resistance increasing groove 303, which effectively improves the bonding effect between the cooled and solidified casting liquid and the lower tube shell 301, thereby effectively improving the blocking effect formed by the cooling and solidification of the casting liquid, blocking the continued discharge of the casting liquid, and making the casting liquid in the mold cavity flow toward other overflow ports 3, thereby effectively improving the filling effect of the casting liquid on the mold cavity, and then effectively improving the integrity of the casting accessories.

[0039] Figure 4 and Figure 6 to Figure 7 As shown, the end of the closed punch 201 away from the upper tube shell 302 is fixedly connected with a vent hole 304, and the outer end of the lower tube shell 301 is fixedly connected with a connecting pipe 305, the connecting pipe 305 is bent in an L shape, and one end of the connecting pipe 305 is plugged into the bottom end of the vent hole 304. The connecting pipe 305 is plugged into the vent hole 304 to achieve air discharge between the lower tube shell 301 and the upper tube shell 302, so that the casting liquid can enter the lower tube shell 301 and the upper tube shell 302.

[0040] When the upper casting mold 102 and the lower casting mold 101 are closed, the lower tube shell 301 and the upper tube shell 302 form a pipeline, and the L-shaped connecting pipe 305 is inserted into the exhaust hole 304 to form an exhaust channel directly through the top of the upper casting mold 102, so as to prevent the cooling water in the cooling water tank 2 from directly entering the lower tube shell 301 and the upper tube shell 302 from the exhaust channel, so as to facilitate the discharge of air between the lower tube shell 301 and the upper tube shell 302, and to facilitate the casting liquid to enter the lower tube shell 301 and the upper tube shell 302.

[0041] The second implementation method:

[0042] Compared with the first embodiment, the main additions are the fitting groove 4 and the blocking piece 401. The specific new structures are as follows, and the remaining structures are consistent with the first embodiment.

[0043] Figures 7 to 9As shown, a fitting groove 4 is provided at the bottom of the lower joint tube shell 301, and the fitting groove 4 is connected to the bottom of the resistance-increasing groove 303, and a plugging piece 401 is embedded in the fitting groove 4, and the fitting groove 4 is connected to the resistance-increasing groove 303, so that the cooling water in the cooling water tank 2 passes through the resistance-increasing groove 303 and contacts the overflowing casting liquid, thereby accelerating the cooling and solidification of the casting liquid, and the plugging piece 401 seals the fitting groove 4 to control the entry of cooling water, and a convex rib 403 is fixedly connected to the upper surface of the plugging piece 401, and the convex rib 403 is plugged into the resistance-increasing groove 303, and the convex rib 403 effectively improves the sealing effect of the resistance-increasing groove 303, and effectively improves the water blocking effect of the plugging piece 401, and the plugging piece 40 1 is fixedly connected with temperature-sensitive stirrups 402 at the four corners, and the top of the temperature-sensitive stirrups 402 is fixedly connected with the fitting groove 4. After the casting liquid enters the lower fitting tube shell 301, the high temperature of the casting liquid affects the temperature-sensitive stirrups 402, so that the temperature-sensitive stirrups 402 are deformed to push away the plugging piece 401, so that the cooling water passes through the resistance-increasing groove 303 and contacts with the overflowing casting liquid. The temperature-sensitive stirrups 402 are U-shaped before deformation, and are U-shaped after deformation. The temperature-sensitive stirrups 402 are made of shape memory alloy material, and the temperature-sensitive stirrups 402 are controlled to change from U-shape to V-shape, which effectively improves the opening and closing effect of the plugging piece 401. The temperature-sensitive stirrups 402 made of shape memory alloy material have better temperature sensing effect;

[0044] After the casting liquid overflows the overflow port 3 and enters between the lower tube shell 301 and the upper tube shell 302, due to the high temperature of the casting liquid, the temperature-sensitive hoop 402 made of shape memory alloy material is deformed under the influence of the high temperature. The specific deformation process is from U-shape to V-shape, so that the temperature-sensitive hoop 402 pushes the blocking piece 401 to leave the fitting groove 4. Since the fitting groove 4 is connected to the resistance-increasing groove 303, the cooling water in the cooling water trough 2 is in direct contact with the casting liquid through the resistance-increasing groove 303, thereby further improving the cooling and solidification effect of the casting liquid, that is, effectively improving the blocking effect of the cooled casting liquid.

[0045] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A casting mold for automobile parts, comprising a casting lower mold (101) and a casting upper mold (102) correspondingly connected to the top of the casting lower mold (101), characterized in that: An injection port (103) is provided in the middle of the upper casting mold (102); the top of the injection port (103) is movably connected to a pressure mold (104); the bottom of the pressure mold (104) is fixedly connected to a pressure column (105); the pressure column (105) is plugged into the injection port (103); a cooling water trough (2) is provided on the outer periphery of the top of the lower casting mold (101); and an overflow port (3) is provided between the upper opening of the lower casting mold (101) and the top of the cooling water trough (2); The lower casting mold (101) is configured as a concave mold, and the upper casting mold (102) is configured as a convex mold. The bottom periphery of the upper casting mold (102) is fixedly connected with a closed convex mold (201), and the closed convex mold (201) is clamped with the upper opening of the cooling water tank (2). A lower combined tube shell (301) is fixedly extended outward from the outside of the overflow port (3). An upper combined tube shell (302) is provided on the lower surface of the closed convex mold (201), and the lower combined tube shell (301) is clamped and assembled with the upper combined tube shell (302), and the inner surface of the lower combined tube shell (301) is equidistantly provided with resistance increasing grooves (303).

2. The automotive parts casting mold according to claim 1, characterized in that: Both ends of the cooling water tank (2) are provided with water injection tanks (202), and the two water injection tanks (202) are respectively connected with water injection pipelines (203) and drainage pipelines (204).

3. The automotive parts casting mold according to claim 1, characterized in that: One end of the closed convex mold (201) away from the upper tube shell (302) is fixedly connected to a vent hole (304), and the outer end of the lower tube shell (301) is fixedly connected to a connecting pipe (305), the connecting pipe (305) is bent in an L shape, and one end of the connecting pipe (305) is plugged into the bottom end of the vent hole (304).

4. The automotive parts casting mold according to claim 1, characterized in that: The bottom of the lower tube shell (301) is provided with an inlay groove (4), the inlay groove (4) is communicated with the bottom of the resistance increasing groove (303), and a blocking piece (401) is inlaid inside the inlay groove (4).

5. The automotive parts casting mold according to claim 1, characterized in that: A convex rib (403) is fixedly connected to the upper surface of the blocking piece (401), and the convex rib (403) is plugged into the resistance-increasing groove (303).

6. The automotive parts casting mold according to claim 5, characterized in that: The four corners of the blocking piece (401) are fixedly connected with temperature-sensitive stirrups (402), and the top ends of the temperature-sensitive stirrups (402) are fixedly connected to the fitting grooves (4).

7. The automotive parts casting mold according to claim 1, characterized in that: The temperature-sensitive stirrup (402) is bent in a U shape before deformation, and is bent in a U shape after deformation, and the temperature-sensitive stirrup (402) is made of a shape memory alloy material.

8. The method for using a casting mold for automobile parts according to claim 1, characterized in that: Step 1: Select the casting lower mold (101) and the casting upper mold (102) required for the casting, close the casting upper mold (102) and the casting lower mold (101), and inject the casting liquid into the mold cavity from the injection port (103) until the casting liquid fills the injection port (103); Step 2: inserting the pressure column (105) of the pressure mold (104) into the injection port (103), applying pressure to the casting liquid in the injection port (103), squeezing the casting liquid in the injection port (103) into the mold cavity between the lower casting mold (101) and the upper casting mold (102), and squeezing the excess casting liquid in the mold cavity from the overflow port (3); Step 3: The casting liquid squeezed out from the overflow port (3) enters the pipe space formed by the lower combined pipe shell (301) and the upper combined pipe shell (302), and the casting liquid is cooled by heat transfer between the lower combined pipe shell (301) and the cooling water in the cooling water tank (2). After the casting liquid is cooled and solidified, the pipe space is blocked, and the subsequent casting liquid is no longer squeezed out from the overflow port (3), but flows in the direction of other overflow ports (3).

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