Automobile rear frame mold

Abstract

The utility model discloses an automobile rear frame mold, and belongs to the technical field of automobile rear frame molds. The automobile rear frame mold comprises a bottom plate, a guide rail is fixedly connected to the upper surface of the bottom plate, a lower pressing block is slidably connected to the outer wall of the guide rail, a containing table is fixedly connected to the upper surface of the bottom plate, a servo motor is arranged in the bottom plate, and the output end of the servo motor is fixedly connected with a gear; according to the device, a sliding block is pulled to move when a rotating plate rotates, the sliding block is supported by a first supporting rod and a second supporting rod, so that when a positioning plate clamps the four edges of a material plate, the four edges of the material plate are more attached, the material plate is effectively prevented from moving in the stamping process, a lower pressing block enables a limiting block to enter a groove in the descending process, and the material plate is prevented from moving. Accurate alignment of the lower pressing block during stamping can be ensured, so that deviation and shaking of the lower pressing block caused by deformation of a material plate are reduced, and the positioning precision is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile stamping dies, and in particular to an automobile rear frame die. Background Art

[0002] Automotive stamping dies are tools used to form metal parts during the automotive manufacturing process. They can process metal sheets into automotive components, such as doors, hoods, roofs, body shells, etc. This type of die is a very critical component in the automotive manufacturing process because it directly affects the accuracy, appearance and production efficiency of automotive parts.

[0003] A patent with publication number CN219745969U discloses an automobile stamping die with a cooling function, comprising a bottom plate, a water cooling box fixedly installed on the upper end of the bottom plate, a refrigeration component arranged on the inner side of the water cooling box, a cooling component arranged on the upper end of the water cooling box, a bottom die fixedly installed on the upper end of the water cooling box, a fixed shaft fixedly installed on the upper end of the bottom plate, a top plate arranged on the upper end of the fixed shaft, a stamping component arranged on the upper end of the top plate, and an upper die arranged on the bottom end of the stamping component; the automobile stamping die with a cooling function drives the upper die to move downward for stamping by the stamping component, and cools the bottom die by the cold water inside the cooling component.

[0004] However, the above technical solution has the following defects:

[0005] 1. The existing stamping dies use locating pins and locating blocks for positioning during the stamping process. This method requires reserving locating pin installation holes on the die in the design stage. The machining accuracy and assembly error of the locating pins and locating blocks will directly affect the accuracy of positioning. In addition, the installation and adjustment of the locating pins and locating blocks require certain skills and experience, and are highly dependent on manual labor, which increases the difficulty of operation and time cost.

[0006] 2. In addition, mold cooling usually adopts water cooling, which sets a cooling channel at the bottom of the mold, and removes the heat generated by the mold during processing through the coolant flowing through the channel. The cooling channel set by this method cannot cover all the hot spots of the mold, especially the hard-to-reach areas in complex molds, and the main heat of the mold is concentrated on the mold surface. Heat dissipation at the bottom and around the mold cannot remove the surface heat in time; Utility Model Content

[0007] One purpose of the present application is to effectively solve the technical problems of positioning the sheet and heat dissipation of the mold during the stamping process.

[0008] In order to achieve the above purpose, the technical solution adopted in the present application is: a rear frame mold of an automobile, comprising a bottom plate, the upper surface of the bottom plate is fixedly connected to a guide rail, the outer wall of the guide rail is slidably connected to a lower pressing block, the upper surface of the bottom plate is fixedly connected to a placing table, a servo motor is arranged inside the bottom plate and a gear is fixedly connected to the output end of the servo motor, the outer wall of the lower pressing block is fixedly connected to a limiting block, and four limiting blocks are arranged with the lower pressing block as a symmetric axis;

[0009] A visual sensor is arranged on one side of the lower pressing block close to the placing table and the visual sensor is electrically controlled and connected to the servo motor; a positioning mechanism is arranged above the placing table for assisting in positioning the material plate; a spraying mechanism is arranged on the outer side of the placing table for spraying lubricant.

[0010] Preferably, the positioning mechanism comprises a connecting column fixedly connected to the upper surface of the gear, a rotating plate fixedly connected to the side of the connecting column away from the gear, a curved connecting rod rotatably connected to the side of the rotating plate close to the connecting column, and four curved connecting rods are arranged with the rotating plate as the axis of symmetry. The curved connecting rods are rotatably connected to the side away from the rotating plate, a circular plate is fixedly connected to the upper surface of the bottom plate, a slide rail is provided on the surface of the circular plate, a positioning plate is fixedly connected to the inner side of the slider, a groove is provided on the surface of the positioning plate, a support rod 1 is fixedly connected to the bottom of the slider, and a support rod 2 is fixedly connected to the side of the slider close to the positioning plate.

[0011] Preferably, four slide rails are arranged with a circular plate as a symmetric axis, and the circular plates are all slidably connected to the slider.

[0012] Preferably, the positioning plate is made of alloy steel, the surface of the positioning plate is nickel-plated, and the groove and the limit block fit perfectly.

[0013] Preferably, the spraying mechanism includes a rack meshingly connected to the outside of the gear, two racks are arranged with the gear as the axis of symmetry, a movable hole is provided on the upper surface of the base plate, the side walls of the racks are fixedly connected with a piston rod, the side of the piston rod away from the rack is slidably connected with an air cylinder, the interior of the air cylinder is connected with a connecting pipe, the end of the connecting pipe away from the air cylinder is connected with a liquid cylinder, the upper surface of the liquid cylinder is provided with a liquid inlet, a nozzle is installed on the side of the liquid cylinder close to the placement table, and an observation window is installed on the side wall of the liquid cylinder.

[0014] Preferably, the racks are slidably connected to the movable holes, a one-way valve is provided inside the air cylinder, a suction hole is provided on the side wall of the air cylinder, the side of the air cylinder close to the connecting pipe is conical, and the air cylinder is fixedly connected to the bottom plate.

[0015] Preferably, the liquid storage cylinders are fixedly connected to the placement table, siphon tubes are installed inside the liquid storage cylinders, the nozzles are facing upwards of the placement table, and the observation windows are transparent in design.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] 1. The utility model utilizes the movement of the positioning plate to achieve the purpose of clamping and positioning the material plate to be stamped. Compared with the method of using positioning blocks and positioning pins in the prior art, the present device utilizes the rotation of the rotating plate to pull the slider to move, and cooperates with the supporting effect of the support rod 1 and the support rod 2 on the slider, so that the positioning plate is more fitted when clamping the four sides of the material plate, effectively preventing the material plate from shifting during the stamping process, and the lower pressing block will make the limit block enter the groove during the descent process, which can ensure the accurate alignment of the lower pressing block during stamping, thereby reducing the offset and jitter of the lower pressing block caused by the deformation of the material plate, and further improving the positioning accuracy.

[0018] 2. The utility model utilizes the horizontal movement of the piston rod to achieve the purpose of spraying the lubricant. Compared with the method of setting cooling water and a lifting device on the back of the mold in the prior art, the device drives the piston rod to move while supporting the positioning, and cooperates with the conical air outlet end of the air reservoir to gradually accelerate the air inside the air reservoir and reach a higher speed at the nozzle outlet, so that the lubricating oil is siphoned into the interior of the nozzle and collides, and the lubricant is sprayed out by atomization through high-speed airflow, so that the atomized lubricant can evenly cover the mold surface, provide effective lubrication, reduce the friction between the mold and the material plate when being stamped, and reduce mold wear. At the same time, the covered lubricating liquid can take away the heat from the mold surface, further improving the heat dissipation effect of the mold, and the atomization method makes the lubricant consumption less, but the lubrication effect is significant, thus saving the lubricant cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the main stereoscopic structural diagram of this utility model;

[0020] Figure 2 This is a cutaway three-dimensional structural diagram of the practical placement table;

[0021] Figure 3 This is a top-down three-dimensional structural diagram of the utility base plate;

[0022] Figure 4 This is a three-dimensional structural diagram of the relevant parts of the connecting column of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the relevant parts of the practical circular plate;

[0024] Figure 6 This is a three-dimensional structural diagram of the relevant parts of the practical slider;

[0025] Figure 7 This is a three-dimensional structural diagram of the relevant parts of the practical gas storage cylinder;

[0026] Figure 8 It is a three-dimensional structural diagram of the relevant parts of the practical liquid storage cylinder.

[0027] In the figure: 1, bottom plate; 11, guide rail; 12, lower pressure block; 1201, limit block; 13, placement table; 14, gear;

[0028] 2. Positioning mechanism; 21. Connecting column; 22. Rotating plate; 23. Bending connecting rod; 24. Sliding block; 25. Round plate; 2501. Slide rail; 26. Positioning plate; 27. Groove; 28. Support rod 1; 29. ​​Support rod 2;

[0029] 3. Spraying mechanism; 31. Rack; 3101. Moving hole; 32. Piston rod; 33. Air storage cylinder; 34. Connecting pipe; 35. Liquid storage cylinder; 36. Liquid inlet; 37. Nozzle; 38. Observation window. DETAILED DESCRIPTION

[0030] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0033] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0034] The prior art has the following defects:

[0035] 1. The existing stamping dies use locating pins and locating blocks for positioning during the stamping process. This method requires reserving locating pin installation holes on the die in the design stage. The machining accuracy and assembly error of the locating pins and locating blocks will directly affect the accuracy of positioning. In addition, the installation and adjustment of the locating pins and locating blocks require certain skills and experience, and are highly dependent on manual labor, which increases the difficulty of operation and time cost.

[0036] 2. In addition, mold cooling usually adopts water cooling, which sets a cooling channel at the bottom of the mold, and removes the heat generated by the mold during processing through the coolant flowing through the channel. The cooling channel set by this method cannot cover all the hot spots of the mold, especially the hard-to-reach areas in complex molds, and the main heat of the mold is concentrated on the mold surface. Heat dissipation at the bottom and around the mold cannot remove the surface heat in time;

[0037] As an improvement, Figures 1 to 8 As shown, the preferred embodiments of the present application are:

[0038] A rear frame mold for an automobile comprises a base plate 1, a guide rail 11 is fixedly connected to the upper surface of the base plate 1, a lower pressing block 12 is slidably connected to the outer wall of the guide rail 11, a placing table 13 is fixedly connected to the upper surface of the base plate 1, a servo motor is arranged inside the base plate 1 and a gear 14 is fixedly connected to the output end of the servo motor.

[0039] Specifically, the outer wall of the lower pressing block 12 is fixedly connected to the limit block 1201, and four limit blocks 1201 are arranged with the lower pressing block 12 as the symmetry axis. A visual sensor is arranged on the side of the lower pressing block 12 close to the placing table 13, and the visual sensor is electrically controlled and connected to the servo motor. A positioning mechanism 2 is arranged above the placing table 13, which is used for assisting in positioning the material plate, and a spraying mechanism 3 is arranged on the outer side of the placing table 13, which is used for spraying lubricant.

[0040] like Figures 2 to 6 As shown, in this embodiment, the positioning mechanism 2 includes a connecting column 21 fixedly connected to the upper surface of the gear 14, a rotating plate 22 is fixedly connected to the side of the connecting column 21 away from the gear 14, and a curved connecting rod 23 is rotatably connected to the side of the rotating plate 22 close to the connecting column 21, and four curved connecting rods 23 are arranged with the rotating plate 22 as the symmetry axis. The side of the curved connecting rod 23 away from the rotating plate 22 is rotatably connected to the slider 24, the upper surface of the bottom plate 1 is fixedly connected to a circular plate 25, and a slide rail 2501 is provided on the surface of the circular plate 25, the inner side of the slider 24 is fixedly connected to the positioning plate 26, and the surface of the positioning plate 26 is provided with a groove 27, the bottom of the slider 24 is fixedly connected to the support rod 1 28, and the side of the slider 24 close to the positioning plate 26 is fixedly connected to the support rod 2 29.

[0041] Specifically, the purpose of clamping and positioning the material sheet to be stamped can be achieved by moving the positioning plate 26. Compared with the method of using positioning blocks and positioning pins in the prior art, the present device uses the rotation of the rotating plate 22 to pull the slider 24 to move, and cooperates with the support rod 1 28 and the support rod 29 to support the slider 24, so that the positioning plate 26 can fit more closely when clamping the four sides of the material sheet, effectively preventing the material sheet from shifting during the stamping process, and the lower pressing block 12 will make the limit block 1201 enter the groove 27 during the descent process, which can ensure the accurate alignment of the lower pressing block 12 during stamping, thereby reducing the offset and jitter of the lower pressing block 12 caused by the deformation of the material sheet, and further improving the positioning accuracy.

[0042] like Figure 5 As shown, in this embodiment, four slide rails 2501 are arranged with the circular plate 25 as the symmetry axis, and the circular plates 25 are all slidably connected to the slider 24.

[0043] Specifically, the use of four-side clamping means that the sheet is fixed and supported in four directions, which has stronger support and stability.

[0044] like Figure 5 As shown, in this embodiment, the positioning plate 26 is made of alloy steel, the surface of the positioning plate 26 is nickel-plated, and the groove 27 fits exactly with the limiting block 1201 .

[0045] Specifically, alloy steel has the characteristics of high strength and wear resistance, which can ensure the long life and reliability of the positioning plate 26 .

[0046] like Figure 7 and Figure 8 As shown, in the present embodiment, the spraying mechanism 3 comprises a rack 31 meshingly connected to the outer side of the gear 14, two racks 31 are arranged with the gear 14 as the axis of symmetry, a movable hole 3101 is provided on the upper surface of the base plate 1, the side walls of the rack 31 are fixedly connected with a piston rod 32, the side of the piston rod 32 away from the rack 31 is slidably connected with an air cylinder 33, the interior of the air cylinder 33 is connected with a connecting pipe 34, the end of the connecting pipe 34 away from the air cylinder 33 is connected with a liquid cylinder 35, the upper surface of the liquid cylinder 35 is provided with a liquid inlet 36, the side of the liquid cylinder 35 close to the placing table 13 is provided with a nozzle 37, and the side wall of the liquid cylinder 35 is provided with an observation window 38.

[0047] Specifically, the purpose of spraying lubricant can be achieved by utilizing the horizontal movement of the piston rod 32. Compared with the method of setting cooling water and a lifting device on the back of the mold in the prior art, the present device drives the piston rod 32 to move while supporting the positioning, and cooperates with the conical air outlet end of the air storage cylinder 33 to gradually accelerate the air inside the air storage cylinder 33 and reach a higher speed at the outlet of the nozzle 37, so that the lubricating oil is siphoned into the interior of the nozzle 37 and collides, and the lubricant is atomized and sprayed out through the high-speed airflow, so that the atomized lubricant can evenly cover the mold surface, provide effective lubrication, reduce the friction between the mold and the material plate when being stamped, and reduce mold wear. At the same time, the covered lubricating liquid can take away the heat from the mold surface, further improving the heat dissipation effect of the mold, and the atomization method makes the lubricant consumption less, but the lubrication effect is significant, thus saving lubricant costs.

[0048] like Figure 7 and Figure 8 As shown, in the present embodiment, two movable holes 3101 are provided, and the racks 31 are slidably connected to the movable holes 3101, a one-way valve is provided inside the air cylinder 33, and a suction hole is provided on the side wall of the air cylinder 33, and the side of the air cylinder 33 close to the connecting pipe 34 is conical, and the air cylinder 33 is fixedly connected to the base plate 1.

[0049] Specifically, through the conical design of the air storage cylinder 33 , the conical streamlined structure reduces air resistance and can increase the injection speed of the gas ejection nozzle 37 .

[0050] like Figure 7 and Figure 8 As shown, in this embodiment, the liquid storage cylinder 35 is fixedly connected to the placement table 13, a siphon tube is installed inside the liquid storage cylinder 35, the nozzle 37 is facing upward from the placement table 13, and the observation window 38 is transparent.

[0051] Specifically, the remaining amount of the lubricant can be observed through the observation window 38, and the atomized lubricant can be evenly covered on the surface of the mold by the direction of the nozzle 37.

[0052] The working principle of this application is:

[0053] Auxiliary positioning steps:

[0054] The operator installs the lower mold on the surface of the placement table 13 and the upper mold on the bottom surface of the lower pressing block 12. Before the stamping is performed, the material sheet to be stamped is transported to the top of the placement table 13 by the vacuum suction cup and placed on the surface of the lower mold. When the visual sensor at the bottom of the lower pressing block 12 detects the material sheet, a signal is transmitted to the servo motor installed inside the bottom plate 1, so that the servo motor is started and the output shaft of the servo motor rotates forward.

[0055] Since the output shaft of the servo motor is fixedly connected to the gear 14, the upper surface of the gear 14 is fixedly connected to the connecting column 21, and the side of the connecting column 21 away from the gear 14 is fixedly connected to the rotating plate 22, when the output shaft of the servo motor rotates forward, the rotating plate 22 rotates together with the output shaft, and the bottom surface of the rotating plate 22 is rotatably connected to the bent connecting rod 23, and the side of the bent connecting rod 23 away from the rotating plate 22 is rotatably connected to the slider 24, and the inner side of the slider 24 is fixedly connected to the positioning plate 26, and the slider 24 is slidably connected to the slide rail 2501, so when the rotating plate When the support 22 is rotated, the bent connecting rod 23 pulls the slider 24, causing the four sliders 24 to move horizontally toward the center of the circular plate 25, so that the positioning plate 26 can clamp and position the material plate above the placement table 13. Since the surface of the positioning plate 26 is provided with a groove 27, and the groove 27 is adapted to the limit block 1201 on the outer wall of the lower pressing block 12, when stamping, the limit block 1201 will enter the groove 27 when the lower pressing block 12 is close to the material plate, so that the lower pressing block 12 descends more stably, thereby making the stamping more stable.

[0056] When the visual detector detects that the stamping is completed, it transmits a signal to the servo motor inside the bottom plate 1 again, causing the output shaft of the servo motor to reverse, and then repeats the above steps in reverse, so that the four positioning plates 26 are away from the stamped material sheet, and the vacuum suction cup takes the material.

[0057] Lubricant spraying steps:

[0058] The operator pours the lubricant into the liquid storage cylinder 35 from the liquid inlet 36. Since the outer side of the gear 14 is meshed with the rack 31, when the gear 14 rotates forward, the rack 31 moves horizontally along the inner wall of the moving hole 3101 toward the side close to the air storage cylinder 33. Since the side wall of the rack 31 is fixedly connected to the piston rod 32, and the side of the piston rod 32 away from the rack 31 is slidably connected to the air storage cylinder 33, when the rack 31 moves horizontally, the one-way valve inside the air storage cylinder 33 opens, so that the piston rod 32 pushes the air inside the air storage cylinder 33 to the connecting pipe 34, and the air is transported to the inside of the liquid storage cylinder 35 through the connecting pipe 34 and sprayed out from the nozzle 37. A siphon is installed inside 35, one end of the siphon is connected to the lubricant at the bottom of the liquid storage cylinder 35, and the other end of the siphon is connected to the nozzle 37. Therefore, when air is ejected from the nozzle 37, due to the high air flow speed, according to the Bernoulli principle, a negative pressure is formed in the internal area of ​​the nozzle 37 close to the liquid storage cylinder 35. Due to the negative pressure in the nozzle 37, the lubricant is sucked into the nozzle 37 from the inside of the liquid storage cylinder 35 through the siphon. Inside the nozzle 37, the lubricant is mixed with the high-speed air flow. The kinetic energy of the high-pressure air flow breaks the lubricant into tiny droplets, which are ejected in the form of mist through the outlet of the nozzle 37 to cover the mold and the material plate, which is convenient for demoulding after stamping and heat dissipation of the surface of the lower mold.

[0059] When the stamping is completed, the gear 14 is reversed, and the above steps are repeated in reverse, so that air is sucked into the air reservoir 33 through the air extraction hole on the side wall of the air reservoir 33, and the one-way valve inside the air reservoir 33 is closed.

[0060] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A rear frame mold for an automobile, comprising a bottom plate (1), the upper surface of the bottom plate (1) being fixedly connected to a guide rail (11), the outer wall of the guide rail (11) being slidably connected to a lower pressing block (12), the upper surface of the bottom plate (1) being fixedly connected to a placing table (13), a servo motor being arranged inside the bottom plate (1) and a gear (14) being fixedly connected to an output end of the servo motor, characterized in that: The outer wall of the lower pressing block (12) is fixedly connected to a limiting block (1201), and four limiting blocks (1201) are arranged with the lower pressing block (12) as a symmetry axis; A visual sensor is arranged on one side of the lower pressing block (12) close to the placement table (13), and the visual sensor is electrically controlled and connected to the servo motor; a positioning mechanism (2) is arranged above the placement table (13) for assisting in positioning the material plate; a spraying mechanism (3) is arranged on the outer side of the placement table (13) for spraying lubricant.

2. The automobile rear frame mold according to claim 1, characterized in that: The positioning mechanism (2) comprises a connecting column (21) fixedly connected to the upper surface of the gear (14); a rotating plate (22) is fixedly connected to the side of the connecting column (21) away from the gear (14); a curved connecting rod (23) is rotatably connected to the side of the rotating plate (22) close to the connecting column (21); four curved connecting rods (23) are arranged with the rotating plate (22) as a symmetric axis; the side of the curved connecting rod (23) away from the rotating plate (22) is rotatably connected to a slider (24); a circular plate (25) is fixedly connected to the upper surface of the bottom plate (1); a slide rail (2501) is provided on the surface of the circular plate (25); a positioning plate (26) is fixedly connected to the inner side of the slider (24); a groove (27) is provided on the surface of the positioning plate (26); a support rod 1 (28) is fixedly connected to the bottom of the slider (24); and a support rod 2 (29) is fixedly connected to the side of the slider (24) close to the positioning plate (26).

3. The automobile rear frame mold according to claim 2, characterized in that: Four slide rails (2501) are arranged with the circular plate (25) as the axis of symmetry, and the circular plates (25) are all slidably connected to the slider (24).

4. The automobile rear frame mold according to claim 2, characterized in that: The material of the positioning plate (26) is alloy steel, the surface of the positioning plate (26) is nickel-plated, and the groove (27) and the limiting block (1201) are exactly matched.

5. The automobile rear frame mold according to claim 1, characterized in that: The spraying mechanism (3) comprises a rack (31) meshingly connected to the outside of the gear (14), two racks (31) are arranged with the gear (14) as the symmetry axis, the upper surface of the bottom plate (1) is provided with a moving hole (3101), the side walls of the racks (31) are fixedly connected with piston rods (32), the side of the piston rods (32) away from the racks (31) is slidably connected with an air storage cylinder (33), the interior of the air storage cylinder (33) is connected with a connecting pipe (34), the end of the connecting pipe (34) away from the air storage cylinder (33) is connected with a liquid storage cylinder (35), the upper surface of the liquid storage cylinder (35) is provided with a liquid inlet (36), the side of the liquid storage cylinder (35) close to the placement table (13) is equipped with a nozzle (37), and the side wall of the liquid storage cylinder (35) is equipped with an observation window (38).

6. The automobile rear frame mold according to claim 5, characterized in that: The movable holes (3101) are provided with two, and the racks (31) are both slidably connected to the movable holes (3101). A one-way valve is provided inside the gas storage cylinder (33), and a suction hole is provided on the side wall of the gas storage cylinder (33). The side of the gas storage cylinder (33) close to the connecting pipe (34) is tapered, and the gas storage cylinder (33) is fixedly connected to the bottom plate (1).

7. The automobile rear frame mold according to claim 5, characterized in that: The liquid storage cylinder (35) is fixedly connected to the placement table (13), a siphon tube is installed inside the liquid storage cylinder (35), the nozzle (37) is facing the top of the placement table (13), and the observation window (38) is of transparent design.

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