A die-casting mold for automobile transmission housing

Abstract

The present invention belongs to the technical field of transmission housing production, and specifically relates to a die-casting mold for an automobile transmission housing, comprising a working bracket, a supporting frame body is installed above the working bracket, a telescopic cylinder is installed at the bottom of the supporting frame body, a movable template is installed at the telescopic end of the telescopic cylinder, a liquid inlet is provided on the surface of the movable template, a fixed template is installed at a position corresponding to the movable template on the upper surface of the working bracket, and the fixed template and the movable template are arranged in the same vertical plane; the movable template is first driven upward by the telescopic cylinder to separate the movable template from the fixed template, and then the molded automobile transmission housing is ejected by an ejection mechanism, and the ejection mechanism can make the ejection action of the molded automobile transmission housing continuous, and will not cause multiple impacts on the die-casting, thereby effectively ensuring the integrity of the automobile transmission housing, especially the structural performance of thin-walled parts.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission housing production, and in particular relates to a die-casting mold for an automobile transmission housing. Background Art

[0002] The automobile transmission is a set of speed-changing devices used to coordinate the engine speed and the actual driving speed of the wheels, so as to bring out the best performance of the engine. The transmission can produce different speed ratios between the engine and the wheels during the driving process of the car, and the engine can work at its best power performance state through gear shifting.

[0003] Automobile transmission housings are generally produced by die casting. The die casting process is as follows: a certain amount of molten metal is filled into the mold cavity at a low or high speed. As the molten metal cools, the molten metal is pressurized and then formed after cooling.

[0004] When the existing automobile transmission housing is demolded after molding, a push rod is used to eject it once. However, the force point of the push rod is located at the contact position with the transmission housing and cannot cover the transmission housing, resulting in the problem that the structure of each part of the transmission housing cannot be guaranteed to be uniform and complete, affecting the molding quality of the automobile transmission housing. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a die-casting mold for an automobile transmission housing, comprising a working bracket, a supporting frame body is installed above the working bracket, a telescopic cylinder is installed at the bottom of the supporting frame body, a movable template is installed at the telescopic end of the telescopic cylinder, a liquid inlet is opened on the surface of the movable template, a fixed template is installed at the upper surface of the working bracket at a position corresponding to the movable template, when the fixed template and the movable template are closed, a gap is left at the junction of the fixed template and the movable template to form a molding cavity for the automobile transmission housing, and a ejecting mechanism is arranged inside the fixed template, and the ejecting mechanism is used to eject the molded automobile transmission housing.

[0007] Preferably, a plurality of air vents are provided on the surface of the movable template, and a guide column matched with the movable template is provided on the surface of the working bracket, and the guide column is used to guide the moving position of the movable template; when working, the air vents are provided, and when the molten metal is injected into the molding cavity, the gas generated inside the molding cavity will be dispersed through the air vents, thereby improving the subsequent molding quality of the automobile transmission housing.

[0008] Preferably, a circular groove is provided on the upper surface of the fixed template, a slider is slidably installed at the center of the groove wall of the circular groove, a sealing plate is provided above the slider, the shape of the sealing plate is matched with the shape of the circular groove, an ejection unit is provided in the groove wall of the circular groove, the ejection unit is used to lift the sealing plate upwards, and the shape of the sealing plate is matched with the bottom shape of the automobile transmission housing.

[0009] Preferably, the ejection unit includes a plurality of articulated frames installed on the outer surface of the slider, a receiving plate is rotatably installed on the surface of each of the articulated frames, the sealed plate is arranged above the receiving plate, a limiting spring is installed on the lower surface of each of the receiving plates, the side of the limiting spring away from the receiving plate is connected to the groove wall of the circular groove, a limiting unit is arranged inside the fixed template, and the limiting unit is used to limit the sealed plate.

[0010] Preferably, the limiting unit includes a plurality of rectangular grooves provided inside the fixed template, an elastic clamping column is slidably installed inside each of the rectangular grooves, the elastic clamping column extends into the circular groove, a plurality of support frames are fixedly connected below the sealing plate, each of the support frames and each of the elastic clamping column are arranged in a one-to-one correspondence, a clamping groove is provided on the surface of each of the support frames, a first telescopic spring is installed at the bottom of the slider, the first telescopic spring is installed at the center of the groove wall of the circular groove, a driving unit is installed below the fixed template, and the driving unit is used to control the movement of all the elastic clamping columns.

[0011] Preferably, an arc-shaped clamping head is fixedly connected to one side of the elastic clamping column close to the clamping slot, the shape of the arc-shaped clamping head is adapted to the shape of the clamping slot, and the surface of the clamping slot is provided with rounded corners; when working, the arc-shaped clamping head is provided, which can facilitate its clamping to the support frame and the sealed plate, so that the sealed plate is in a fixed state, and rounded corners are provided on the surface of the clamping slot, which can facilitate the arc-shaped clamping head to be clamped into the clamping slot and detached from the inside thereof.

[0012] Preferably, a second telescopic spring is installed on the groove wall of each rectangular groove, and the second telescopic spring is connected to the end surface of the elastic clamping column away from the groove wall of the rectangular groove.

[0013] Preferably, the driving unit includes a cylinder installed on the surface of the working bracket, the telescopic end of the cylinder is installed with a connecting plate, the top surface of the connecting plate is installed with a plurality of pressure columns, the plurality of pressure columns and the plurality of elastic push rods are arranged in a one-to-one correspondence, and each of the pressure columns respectively penetrates to the bottom of the fixed template, the lower surface of the elastic clamping column is installed with an inclined block, and the top end of the pressure column contacts with the inclined surface of the inclined block.

[0014] Preferably, a ball is rotatably installed at the contact position between the pressure column and the inclined block, and the ball is rotatably arranged on the inclined surface of the inclined block. The arrangement of the ball can facilitate the extrusion of the inclined block by die casting, thereby facilitating the movement of the elastic clamping column.

[0015] Preferably, a hollow groove matched with the pressure column is opened inside the fixed template, and the shape of the hollow groove is matched with the shape of the pressure column. During operation, since multiple pressure columns and multiple elastic clamping columns are arranged in a one-to-one correspondence, when the pressure column moves upward, the pressure columns at different positions will compress the inclined blocks and elastic clamping columns at different positions, so that all the elastic clamping columns will synchronously move away from the clamping grooves, thereby facilitating the subsequent removal of the transmission housing.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The automobile transmission housing die-casting mold described in the present invention can push up the entire sealing plate at a faster speed through the ejection unit. Moreover, since the shape of the sealing plate is compatible with the shape of the bottom of the automobile transmission housing, the problem in the prior art that a push rod is used for one-time ejection during demoulding is solved, and the force point of the push rod is located at the contact position with the transmission housing and cannot cover the transmission housing, resulting in the inability to ensure uniformity and integrity of the structure of various parts of the transmission housing, which is beneficial to the subsequent use of the transmission housing.

[0018] 2. The automobile transmission housing die-casting mold described in the present invention controls the limit unit so that it no longer limits the sealing plate. Subsequently, under the synchronous recovery of the limit springs at different positions, the receiving plate and the sealing plate can be quickly driven to rise upward, so that the formed transmission housing can be quickly ejected. This not only speeds up the ejection of the formed transmission housing and reduces the friction between the transmission housing and the inner wall of the fixed mold plate during slow ejection, but also enables the transmission housing to be evenly stressed during ejection, thereby improving the molding quality of the transmission housing and facilitating its use.

[0019] 3. The automobile transmission housing die-casting mold described in the present invention, when the transmission housing needs to be removed after one-time molding is completed, all the elastic clamping columns are synchronously moved away from the slots through the driving unit, so that the elastic clamping columns no longer limit the slots. Thereafter, under the action of the first telescopic spring and the limit spring, the sealing plate can be quickly moved up and the transmission housing can be ejected, which is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the die-casting mold for the automobile transmission housing according to an embodiment of the present invention;

[0022] Figure 2It is a schematic diagram of the structure of the movable template part of an embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a fixed template part of an embodiment of the present invention;

[0024] Figure 4 The present invention Figure 3 A magnified view of the structure at A;

[0025] Figure 5 is a schematic diagram of the structure of a closed plate portion of an embodiment of the present invention;

[0026] Figure 6 The present invention Figure 5 A magnified view of the structure at B;

[0027] Figure 7 It is a schematic diagram of the structure of the receiving plate of an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of the structure of the connection disk part of an embodiment of the present invention;

[0029] Fig. 9 The present invention Figure 8 Enlarged view of the structure at location C.

[0030] In the figure: 1. working bracket; 101. fixed template; 2. supporting frame; 3. telescopic cylinder; 4. moving template; 5. circular groove; 501. slider; 6. hinged frame; 7. receiving plate; 701. limit spring; 8. first telescopic spring; 9. sealing plate; 10. supporting frame; 11. rectangular groove; 12. elastic clamping column; 13. clamping groove; 14. second telescopic spring; 15. arc clamping head; 16. inclined block; 17. pressure column; 18. connecting plate. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] like Figures 1 to 3As shown, a die-casting mold for an automobile transmission housing described in an embodiment of the present invention includes a working bracket 1, a supporting frame 2 is installed above the working bracket 1, a telescopic cylinder 3 is installed at the bottom of the supporting frame 2, a movable template 4 is installed at the telescopic end of the telescopic cylinder 3, a liquid inlet is opened on the surface of the movable template 4, a fixed template 101 is installed at a position corresponding to the movable template 4 on the upper surface of the working bracket 1, when the fixed template 101 and the movable template 4 are closed, a gap is left at the junction of the fixed template 101 and the movable template 4 to form a molding cavity for the automobile transmission housing, and a ejecting mechanism is arranged inside the fixed template 101, and the ejecting mechanism is used to eject the molded automobile transmission housing.

[0033] During operation, when the automobile transmission housing is die-cast, the telescopic end of the telescopic cylinder 3 is controlled to drive the movable platen 4 to move downward, so that the movable platen 4 and its corresponding fixed platen 101 are molded together, and then high-pressure molten metal is injected into the cavity between the fixed platen 101 and the movable platen 4 through the liquid inlet on its surface. After the molten metal is cooled and die-cast, the movable platen 4 is first driven to move upward by the telescopic cylinder 3, so that the movable platen 4 is separated from the fixed platen 101, and then the molded automobile transmission housing is ejected through the ejection mechanism. Through the setting of the ejection mechanism, the ejection action of the molded automobile transmission housing can be continuous, and multiple impacts will not be generated on the die-casting, which effectively ensures the integrity of the automobile transmission housing, especially the structural performance of thin-walled parts.

[0034] A plurality of air vents are provided on the surface of the movable template 4, and a guide column matched with the movable template 4 is provided on the surface of the working bracket 1, and the guide column is used to guide the moving position of the movable template 4; when working, the air vents are provided, and when the molten metal is injected into the molding cavity, the gas generated inside the molding cavity will be dispersed through the air vents, thereby improving the subsequent molding quality of the automobile transmission housing.

[0035] like Figures 2 to 7 As shown, a circular groove 5 is provided on the upper surface of the fixed template 101, a slider 501 is slidably installed at the center of the groove wall of the circular groove 5, a sealing plate 9 is provided above the slider 501, and the shape of the sealing plate 9 is matched with the shape of the circular groove 5, and an ejection unit is provided in the groove wall of the circular groove 5, and the ejection unit is used to lift the sealing plate 9 upwards, and the shape of the sealing plate 9 is matched with the bottom shape of the automobile transmission housing.

[0036] During operation, in the initial state, that is, when the fixed mold plate 101 and the movable mold plate 4 are molded together, the sealing plate 9 is in the circular groove 5 and is completely in contact with the circular groove 5. At this time, the upper surface of the fixed mold plate 101 is a smooth plane. Figure 5As shown; after the automobile transmission housing is die-cast and the fixed mold plate 101 and the movable mold plate 4 are separated from each other, the entire sealing plate 9 can be pushed up at a faster speed through the ejection unit, and because the shape of the sealing plate 9 is compatible with the shape of the bottom of the automobile transmission housing, the problem of using a push rod to eject it once during demolding in the prior art is solved, and the force point of the push rod is located at the contact position with the transmission housing and cannot cover the transmission housing, resulting in the inability to ensure the uniformity and integrity of the structure of various parts of the transmission housing, which is beneficial to the subsequent use of the transmission housing.

[0037] The ejection unit includes a plurality of articulated frames 6 installed on the outer surface of the slider 501, and a receiving plate 7 is rotatably installed on the surface of each of the articulated frames 6. The sealed plate 9 is arranged above the receiving plate 7, and a limiting spring 701 is installed on the lower surface of each of the receiving plates 7. The side of the limiting spring 701 away from the receiving plate 7 is connected to the groove wall of the circular groove 5, and a limiting unit is arranged inside the fixed template 101, and the limiting unit is used to limit the sealed plate 9.

[0038] During operation, before the fixed template 101 and the movable template 4 are combined, and the sealing plate 9 is not in the circular groove 5, the staff first presses the sealing plate 9 downward, so that the sealing plate 9 presses down the receiving plate 7, and the receiving plate 7 rotates at a certain angle and compresses the limit spring 701. When the sealing plate 9 is completely in the circular groove 5, it will be limited and fixed by the limit unit, refer to the attached Figure 5 and Figure 6 As shown; when the transmission housing is formed and combined, and the fixed template 101 and the movable template 4 are separated, the limiting unit is controlled so that it no longer limits the sealing plate 9. Subsequently, under the synchronous recovery of the limiting springs 701 at different positions, the receiving plate 7 and the sealing plate 9 can be quickly driven to rise upward, so that the formed transmission housing can be quickly ejected. This not only speeds up the ejection of the formed transmission housing, reduces the friction between the transmission housing and the inner wall of the fixed template 101 during slow ejection, but also enables the transmission housing to be evenly stressed during ejection, thereby improving the molding quality of the transmission housing and facilitating its use.

[0039] like Figure 5 to Figure 6As shown, the limiting unit includes a plurality of rectangular grooves 11 opened inside the fixed template 101, and an elastic clamping column 12 is slidably installed inside each of the rectangular grooves 11, and the elastic clamping column 12 extends into the circular groove 5. A plurality of support frames 10 are fixedly connected below the sealing plate 9, and each of the support frames 10 and each of the elastic clamping columns 12 are arranged in a one-to-one correspondence. A clamping groove 13 is opened on the surface of each of the support frames 10, and a first telescopic spring 8 is installed at the bottom of the slider 501, and the first telescopic spring 8 is installed at the center of the groove wall of the circular groove 5. A driving unit is installed below the fixed template 101, and the driving unit is used to control the movement of all the elastic clamping columns 12.

[0040] During operation, when the sealed plate 9 needs to be completely placed inside the circular groove 5, when the sealed plate 9 presses down the slider 501, the slider 501 will squeeze the first telescopic spring 8 at the same time and the receiving plates 7 at different positions will rotate, and at the same time, the sealed plate 9 will simultaneously drive the support frame 10 on the ground to move down along the groove wall of the circular groove 5, and the outer surface of the support frame 10 will contact and squeeze the end of the elastic clamping column 12. When the sealed plate 9 is completely placed inside the circular groove 5, the end of the elastic clamping column 12 will be stuck in the clamping groove 13 of the support frame 10, so as to fix the sealed plate 9, refer to the attached drawing. Figure 5 and Figure 6 As shown; at this time, the upper surface of the fixed template 101 is a smooth surface; when the transmission housing needs to be removed after the one-step molding is completed, all the elastic clamping columns 12 are synchronously moved away from the clamping slots 13 through the driving unit, so that the elastic clamping columns 12 no longer limit the clamping slots 13, and then under the action of the first telescopic spring 8 and the limit spring 701, the sealing plate 9 can be quickly moved up and the transmission housing can be pushed out, which is more convenient to operate.

[0041] It should be noted that the restoring force of the first telescopic spring 8 and the limit spring 701 and the upward movement of the sealing plate 9 are sufficient to push out the molded transmission housing.

[0042] An arc-shaped clamping head 15 is fixedly connected to one side of the elastic clamping column 12 close to the clamping slot 13. The shape of the arc-shaped clamping head 15 is adapted to the shape of the clamping slot 13, and the surface of the clamping slot 13 is provided with rounded corners. When working, the arc-shaped clamping head 15 is provided to facilitate the clamping of the support frame 10 and the sealed plate 9, so that the sealed plate 9 is in a fixed state, and the rounded corners are provided on the surface of the clamping slot 13, which can facilitate the arc-shaped clamping head 15 to be clamped into the clamping slot 13 and detached from the inside thereof.

[0043] A second telescopic spring 14 is installed on the groove wall of each rectangular groove 11 , and the second telescopic spring 14 is connected to the end surface of the elastic clamping column 12 away from the groove wall of the rectangular groove 11 .

[0044] During operation, when the support frame 10 moves downward along the wall of the circular groove 5, the support frame 10 will squeeze the arc-shaped clamping head 15, the elastic clamping column 12 and the second telescopic spring 14, so that the second telescopic spring 14 is in an extruded state; when the slot 13 and the arc-shaped clamping head 15 are parallel, the second telescopic spring 14 in an extruded state will drive the arc-shaped clamping head 15 to be completely clamped into the slot 13, ensuring that the sealing plate 9 is in a fixed state, facilitating the subsequent molding of the molten metal, and facilitating the subsequent removal of the molded transmission housing.

[0045] like Figures 7 to 9 As shown, the driving unit includes a cylinder installed on the surface of the working bracket 1, and a connecting plate 18 is installed at the telescopic end of the cylinder. A plurality of pressure columns 17 are installed on the top surface of the connecting plate 18. The plurality of pressure columns 17 and the plurality of elastic push rods are arranged in a one-to-one correspondence, and each of the pressure columns 17 respectively penetrates to the bottom of the fixed template 101, and an inclined block 16 is installed on the lower surface of the elastic clamping column 12, and the top end of the pressure column 17 contacts with the inclined surface of the inclined block 16.

[0046] During operation, when the formed transmission housing needs to be ejected, the telescopic end of the control cylinder drives the connecting plate 18 to move upward, and the connecting plate 18 drives the pressure column 17 to move upward, so that the top end of the pressure column 17 compresses the inclined surface of the inclined block 16. Since the elastic clamping column 12 is slidably installed in the rectangular groove 11, the inclined block 16 will drive the elastic clamping column 12 and the arc-shaped clamping head 15 to slowly disengage from the clamping groove 13 under the pressure of the inclined block 16. Then, under the action of the first telescopic spring 8 and the limit spring 701, the sealing plate 9 can be quickly moved upward and the transmission housing can be ejected. This not only speeds up the ejection of the formed transmission housing and reduces the friction between the transmission housing and the inner wall of the fixed template 101 during slow ejection, but also makes the transmission housing evenly stressed during ejection, thereby improving the molding quality of the transmission housing.

[0047] A ball is rotatably installed at the contact position between the pressure column 17 and the inclined block 16 . The ball is rotatably arranged on the inclined surface of the inclined block 16 . The arrangement of the ball can facilitate the pressure column 17 to squeeze the inclined block 16 , thereby facilitating the movement of the elastic clamping column 12 .

[0048] The fixed template 101 has an empty groove inside that matches the pressure column 17. The shape of the empty groove matches the shape of the pressure column 17. During operation, since multiple pressure columns 17 and multiple elastic clamping columns 12 are arranged in a one-to-one correspondence, when the pressure columns 17 move upward, the pressure columns 17 at different positions will compress the inclined blocks 16 and elastic clamping columns 12 at different positions, so that all the elastic clamping columns 12 are synchronously moved away from the clamping grooves 13, so that the subsequent removal of the transmission housing can be facilitated.

[0049] During operation, when the automobile transmission housing is die-cast, the telescopic end of the telescopic cylinder 3 is controlled to drive the movable platen 4 to move downward, so that the movable platen 4 and its corresponding fixed platen 101 are molded together, and then high-pressure molten metal is injected into the cavity between the fixed platen 101 and the movable platen 4 through the liquid inlet on its surface. After the molten metal is cooled and die-cast, the movable platen 4 is first driven upward by the telescopic cylinder 3 to separate the movable platen 4 from the fixed platen 101, and then the molded automobile transmission housing is ejected through the ejection mechanism. Through the setting of the ejection mechanism, the ejection action of the molded automobile transmission housing can be continuous, and multiple impacts will not be generated on the die-casting, which effectively ensures the integrity of the automobile transmission housing, especially the structural performance of thin-walled parts. In the initial state, that is, when the fixed platen 101 and the movable platen 4 are molded together, the sealing plate 9 is in the circular groove 5 and is completely in contact with the circular groove 5. At this time, the upper surface of the fixed platen 101 is a smooth plane, refer to the attached Figure 5 As shown; after the automobile transmission housing is die-cast and the fixed mold plate 101 and the movable mold plate 4 are separated from each other, the entire sealing plate 9 can be pushed up at a faster speed through the ejection unit, and because the shape of the sealing plate 9 is compatible with the shape of the bottom of the automobile transmission housing, the problem of using a push rod to eject it once during demolding in the prior art is solved, and the force point of the push rod is located at the contact position with the transmission housing and cannot cover the transmission housing, resulting in the inability to ensure the uniformity and integrity of the structure of various parts of the transmission housing, which is beneficial to the subsequent use of the transmission housing.

[0050] When the fixed template 101 and the movable template 4 are not yet combined, and the sealing plate 9 is not in the circular groove 5, the staff first presses the sealing plate 9 downward, so that the sealing plate 9 presses down the receiving plate 7, and the receiving plate 7 rotates at a certain angle and compresses the limit spring 701. When the sealing plate 9 is completely in the circular groove 5, it will be limited and fixed by the limit unit. Figure 5 and Figure 6As shown; when the transmission housing is formed and combined, and the fixed template 101 and the movable template 4 are separated, the control limit unit is made so that it no longer limits the sealing plate 9, and then the limit springs 701 at different positions are restored synchronously, which can quickly drive the receiving plate 7 and the sealing plate 9 to rise upward, so that the formed transmission housing can be quickly ejected, which not only speeds up the ejection of the formed transmission housing and reduces the friction between the transmission housing and the inner wall of the fixed template 101 during slow ejection, but also makes the transmission housing evenly stressed during ejection, thereby improving the molding quality of the transmission housing and facilitating its ejection. Use; when it is necessary to completely place the sealed plate 9 inside the circular groove 5, when the sealed plate 9 presses down the slider 501, the slider 501 will squeeze the first telescopic spring 8 at the same time and the receiving plates 7 at different positions will rotate, and at the same time, the sealed plate 9 will simultaneously drive the support frame 10 on the ground to move down along the groove wall of the circular groove 5, and the outer surface of the support frame 10 will contact and squeeze the end of the elastic clamping column 12. When the sealed plate 9 is completely placed inside the circular groove 5, the end of the elastic clamping column 12 will be stuck in the clamping groove 13 of the support frame 10, so as to fix the sealed plate 9, refer to the attached Figure 5 and Figure 6 As shown; at this time, the upper surface of the fixed template 101 is a smooth surface; when the transmission housing needs to be removed after the one-step molding is completed, all the elastic clamping columns 12 are synchronously moved away from the clamping slots 13 through the driving unit, so that the elastic clamping columns 12 no longer limit the clamping slots 13, and then under the action of the first telescopic spring 8 and the limit spring 701, the sealing plate 9 can be quickly moved up and the transmission housing can be pushed out, which is more convenient to operate.

[0051] When the formed transmission housing needs to be ejected, the telescopic end of the control cylinder drives the connecting plate 18 to move upward, and the connecting plate 18 drives the pressure column 17 to move upward, so that the top of the pressure column 17 compresses the inclined surface of the inclined block 16. Since the elastic clamping column 12 is slidably installed in the rectangular groove 11, the inclined block 16 will drive the elastic clamping column 12 and the arc-shaped clamping head 15 to slowly disengage from the clamping groove 13 under the pressure of the inclined block 16. Then, under the action of the first telescopic spring 8 and the limit spring 701, the sealing plate 9 can be quickly moved upward and the transmission housing can be ejected. It can not only speed up the ejection of the formed transmission housing and reduce the friction between the transmission housing and the inner wall of the fixed template 101 during slow ejection, but also make the transmission housing evenly stressed during ejection, thereby improving the molding quality of the transmission housing; since the multiple pressure columns 17 and the multiple elastic clamping columns 12 are arranged in a one-to-one correspondence, when the pressure columns 17 move upward, the pressure columns 17 at different positions will compress the inclined blocks 16 and the elastic clamping columns 12 at different positions, so that all the elastic clamping columns 12 are synchronously away from the clamping grooves 13, so that the subsequent removal of the transmission housing can be facilitated.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A die-casting mold for an automobile transmission housing, characterized in that: The invention comprises a working support (1), a supporting frame (2) is installed above the working support (1), a telescopic cylinder (3) is installed at the bottom of the supporting frame (2), a movable template (4) is installed at the telescopic end of the telescopic cylinder (3), a liquid inlet is provided on the surface of the movable template (4), a fixed template (101) is installed at a position corresponding to the movable template (4) on the upper surface of the working support (1), when the fixed template (101) and the movable template (4) are molded, a gap is left at the junction of the fixed template (101) and the movable template (4) to form a molding cavity for an automobile transmission housing, and an ejection mechanism is arranged inside the fixed template (101), and the ejection mechanism is used to eject the molded automobile transmission housing; A circular groove (5) is provided on the upper surface of the fixed template (101), a slider (501) is slidably mounted at the center of the groove wall of the circular groove (5), a sealing plate (9) is arranged above the slider (501), the shape of the sealing plate (9) matches the shape of the circular groove (5), an ejection unit is arranged in the groove wall of the circular groove (5), the ejection unit is used to push the sealing plate (9) upwards, and the shape of the sealing plate (9) matches the shape of the bottom of the automobile transmission housing; The ejection unit comprises a plurality of hinged frames (6) mounted on the outer surface of the slider (501), a receiving plate (7) being rotatably mounted on the surface of each hinged frame (6), the sealing plate (9) being arranged above the receiving plate (7), a limiting spring (701) being installed on the lower surface of each receiving plate (7), the side of the limiting spring (701) away from the receiving plate (7) being connected to the groove wall of the circular groove (5), a limiting unit being arranged inside the fixed template (101), the limiting unit being used to limit the sealing plate (9); The limiting unit comprises a plurality of rectangular grooves (11) provided inside the fixed template (101), each of the rectangular grooves (11) being slidably provided with an elastic clamping column (12), the elastic clamping column (12) extending into the circular groove (5), a plurality of support frames (10) being fixedly connected below the sealing plate (9), each of the support frames (10) and each of the elastic clamping columns (12) being arranged in a one-to-one correspondence, a clamping groove (13) being provided on the surface of each of the support frames (10), a first telescopic spring (8) being provided at the bottom of the slider (501), the first telescopic spring (8) being provided at the center of the groove wall of the circular groove (5), a driving unit being provided below the fixed template (101), the driving unit being used to control the movement of all the elastic clamping columns (12); The driving unit comprises an oil cylinder mounted on the surface of the working support (1), a connecting plate (18) being mounted on the telescopic end of the oil cylinder, a plurality of pressure columns (17) being mounted on the top surface of the connecting plate (18), the plurality of pressure columns (17) and the plurality of elastic clamping columns (12) being arranged in a one-to-one correspondence, and each of the pressure columns (17) respectively penetrates to the bottom of the fixed template (101), an inclined block (16) being mounted on the lower surface of the elastic clamping column (12), and the top end of the pressure column (17) contacts the inclined surface of the inclined block (16).

2. The automobile transmission housing die-casting mold according to claim 1, characterized in that: The surface of the movable template (4) is provided with a plurality of air outlet holes, and the surface of the working support (1) is provided with a guide column matched with the movable template (4), and the guide column is used to guide the moving position of the movable template (4).

3. The automobile transmission housing die-casting mold according to claim 1, characterized in that: An arc-shaped clamping head (15) is fixedly connected to one side of the elastic clamping column (12) close to the clamping slot (13); the shape of the arc-shaped clamping head (15) is adapted to the shape of the clamping slot (13); and a rounded corner is arranged on the surface of the clamping slot (13).

4. The automobile transmission housing die casting mold according to claim 1, characterized in that: A second telescopic spring (14) is installed on the groove wall of each rectangular groove (11), and the second telescopic spring (14) is connected to the end surface of the elastic clamping column (12) away from the groove wall of the rectangular groove (11).

5. The die-casting mold for automobile transmission housing according to claim 1, characterized in that: A ball is rotatably mounted at the contact position between the pressure column (17) and the inclined block (16), and the ball is rotatably arranged on the inclined surface of the inclined block (16).

6. The automobile transmission housing die-casting mold according to claim 1, characterized in that: A hollow groove matched with the pressure column (17) is provided inside the fixed template (101), and the shape of the hollow groove matches the shape of the pressure column (17).

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