CN221365615U - Multistage ejection injection mold for lower guard plate of automobile front bumper - Google Patents

Abstract

The application relates to a multistage ejection injection mold for a lower guard plate of an automobile front bumper, which comprises a rear mold panel, a cavity plate with a molding surface, a core block, a first ejection mechanism and a driving piece, wherein the first ejection mechanism is used for ejecting a product and comprises a side drawing block, a first limiting assembly, a second limiting assembly and the driving piece, a cushion block is arranged on the rear mold panel, the core block is slidably connected onto the cushion block along a demolding direction, the side drawing block is positioned between the cushion block and the core block, the side drawing block is slidably connected onto the cushion block along a direction oblique to the demolding direction, the side drawing block is slidably connected onto the core block along a direction perpendicular to the demolding direction, the driving piece drives the side drawing block to slide, and the first limiting assembly and the second limiting assembly limit the sliding of the core block and the side drawing block respectively. The side drawing block is linked with the core block, when the side drawing block moves towards one side far away from the rear mould panel, the core block is driven to move together, and after the side drawing block is separated from a product, the product is left on the core block, so that the demoulding of the back-off part is completed.

Description

Multistage ejection injection mold for lower guard plate of automobile front bumper

Technical Field

The utility model relates to the field of injection molds, in particular to a multistage ejection injection mold for a lower guard plate of an automobile front bumper.

Background

Injection molding is a widely used and well developed process, and is well suited for rapid production of parts with stringent tolerance requirements. The process is used to make a wide variety of plastic products. The automobile bumper is an important part of the exterior of the vehicle and is also one of the key parts for protecting the vehicle, and the processing technology of the automobile bumper has important influence on the appearance and the safety of the automobile. Most of automobile bumpers are produced by injection molding, so that the complete mechanism and the accurate size of the automobile bumpers can be well ensured.

The utility model discloses an injection mold for processing automobile parts, which is disclosed in the publication No. CN217073072U, and comprises a base, an upper mold and a lower mold, wherein the lower mold is positioned below the upper mold, and forms an injection cavity when the upper mold and the lower mold are closed, one end of the base is connected with a vertical guide column, and the other end of the base is fixed with a driving motor; the top end of the guide post is connected with a top plate, the driving motor is upwards connected with a screw rod, and the top end of the screw rod is rotationally connected with the top plate; the lead screw penetrates through and is screwed with the lifting plate, and the guide post also penetrates through the lifting plate; an upper die is fixed below the lifting plate, and is provided with an injection pipe; the movable plate is placed at the inner bottom of the lower die, the material ejection rod is arranged below the movable plate, and the material ejection rod is connected with the lifting plate through the connecting rod.

According to the injection mold in the technical scheme, after injection molding, the lifting plate moves upwards to separate the top cover piece from the upper mold, then the material ejection rod passes through the through hole to prop against the movable plate, and the movable plate moves upwards with the top cover piece, so that the movable plate is separated from the lower mold, and demolding of a product is realized; but car front bumper's volume is great and have a large amount of buckle structures, and the drawing of patterns that drives the top cap through the fly leaf in only above-mentioned technical scheme realizes car front bumper can lead to the damage of buckle structure and the difficult condition of product drawing of patterns on the product.

Disclosure of utility model

In order to facilitate demolding of automobile front bumper products, the application provides a multistage ejection injection mold for a lower guard plate of an automobile front bumper.

The application provides a multistage ejection injection mold for a lower guard plate of an automobile front bumper, which adopts the following technical scheme:

The utility model provides an ejecting injection mold of backplate multistage under car front bumper, includes cavity board, core piece and the back mould panel that have the shaping face, still includes first ejection mechanism and second ejection mechanism, first ejection mechanism and second ejection mechanism are ejecting the product in proper order, first ejection mechanism is including the side and is taken out piece, first spacing subassembly, second spacing subassembly and driving piece, be equipped with the cushion on the back mould panel, the core piece is followed drawing of patterns direction sliding connection of mould on the cushion, the side is taken out the piece and is located between cushion and the core piece, the side is taken out the piece and is followed drawing of patterns direction sliding connection on the cushion that inclines to the mould, the side is taken out the piece and is followed perpendicular to drawing of patterns direction sliding connection of mould on the core piece, driving piece is used for driving the side and is taken out the slip of piece, first spacing subassembly is used for spacing the slip of core piece, the second spacing subassembly is used for carrying out the slip that the side is taken out the spacing.

By adopting the technical scheme, the side drawing block is linked with the core block, when the die is opened, the driving piece drives the side drawing block to slide, so that the driving piece slides along the demoulding direction inclined to the die and slides along the demoulding direction vertical to the die relative to the core block, and the side drawing block is used for demoulding the inverted buckle structure on the product; because the side is taken out the piece and is located between core piece and the back die plate, when the side is taken out the piece and is moved towards one side of keeping away from the back die plate, can drive the core piece and move towards one side of keeping away from the back die plate together, after the side is taken out the piece and is broken away from the product, make the product stay on the core piece, the follow-up drawing of patterns of car front bumper of being convenient for.

Preferably, the driving piece comprises a hook block and a spring, a hook groove matched with the hook block is formed in the side-pulling block, the hook block is connected to the cavity plate in a sliding mode along the demolding direction perpendicular to the mold, the spring is arranged on the cavity plate, the spring always drives the hook block to slide towards one side of the side-pulling block, and when the mold is in a mold closing state, the hook block is located in the hook groove.

Through adopting above-mentioned technical scheme, when the mould die sinking, the die cavity board can be followed drawing of patterns direction and moved towards one side of keeping away from the back mould panel, and the piece just can catch on the side back piece and move towards one side of keeping away from the side and take out the piece together to the die cavity board, because the side is taken out the piece and is moved along the drawing of patterns direction that inclines to the mould, so when the piece is taken out the piece and move the certain distance to the side, the piece that colludes can break away from and collude the groove, makes the movable mould part and the cover half part separation of mould.

Preferably, the driving piece further comprises a cylinder, the cylinder is fixedly connected to the cushion block, and one end of a piston rod of the cylinder is fixedly connected to the core block.

Through adopting above-mentioned technical scheme, through the piston motion of the last piston rod of cylinder, drive the core piece and carry out the back and forth motion along the drawing of patterns direction of mould, when the mould die sinking, the piston rod on the cylinder stretches out, makes the core piece move towards one side of keeping away from the back mould face plate.

Preferably, the first limiting component comprises a first sliding rail and a first sliding block, the first sliding rail is fixedly connected to the cushion block, a first limiting groove is formed in the first sliding rail, the first sliding block is fixedly connected to the core block, and the first sliding block is slidingly connected in the first limiting groove along the demolding direction of the mold

Through adopting above-mentioned technical scheme, make first slider sliding connection in first spacing inslot, played the effect of restriction to the slip direction and the slip distance of core piece, reduced core piece slip direction skew or slip too much, lead to the side to take out the possibility that the linkage of piece appears getting worse.

Preferably, the cavity plate is provided with a containing groove, and when the die is in a die closing state, one end of the first sliding rail, which is far away from the cushion block, is matched with the containing groove.

By adopting the technical scheme, when the die is in the die-closing state, the die cavity plate is positioned and limited, so that the possibility of deviation of the position of the die cavity plate during die closing or the possibility of movement of the position of the die cavity plate after die closing is reduced.

Preferably, the second limiting assembly comprises a second sliding rail and a second sliding block, the second sliding rail is fixedly connected to the cushion block, a second limiting groove is formed in the second sliding rail, the second sliding block is fixedly connected to the side drawing block, and the second sliding block is slidably connected in the second limiting groove along the demoulding direction of the inclination and the mould.

Through adopting above-mentioned technical scheme, make second slider sliding connection in the second spacing inslot, played the effect of restriction to the slip direction of taking out the piece, reduced the side and taken out piece slip direction skew too much, lead to the drawing of patterns the side and take out the possibility that the piece caused the damage to the back-off part.

Preferably, the second limiting assembly further comprises a T-shaped sliding rail, the core block is provided with a containing groove, the T-shaped sliding rail is fixedly connected in the containing groove, and the side drawing block is slidingly connected on the T-shaped sliding rail along the demoulding direction perpendicular to the mould.

Through adopting above-mentioned technical scheme, the setting of holding tank has reduced the side and has taken out the possibility that the piece interfered when sliding with the core piece, and the position and the slip direction of "T" shape slide rail pair side take out the piece on the core piece have carried out spacingly.

Preferably, the second ejection mechanism comprises a top plate and a plurality of ejector pins, a plurality of ejector pins with forming surfaces are slidably connected to the core block along the mold opening direction of the mold, the top plate is slidably connected to the cushion block along the mold opening direction of the mold, the ejector pins correspond to the ejector pins, the two ends of the axis direction of the ejector pins are fixedly connected to the top plate and the corresponding ejector pins respectively, KO holes are formed in the rear mold panel, and the KO holes are used for allowing ejection rods on an injection molding machine to pass through.

Through adopting above-mentioned technical scheme, when the mould die sinking, the top rod on the injection molding machine passes KO hole butt on the roof, promotes the roof through the top pushing, makes thimble and kicking block slide towards one side of keeping away from the back mould panel, carries out ejecting to the product of leaving on the core piece, makes the product accomplish the drawing of patterns, carries out ejecting through the kicking block that has the shaping face, can reduce the possibility that causes the damage to the product during ejecting.

The technical effects of the utility model are mainly as follows:

1. According to the utility model, the side drawing block is linked with the core block by the linkage of the side drawing block and the core block, when the die is opened, the driving piece drives the side drawing block to slide, so that the driving piece slides along the demoulding direction inclined to the die and slides along the demoulding direction vertical to the die relative to the core block, and the side drawing block is used for demoulding the inverted buckle structure on the product; because the side drawing block is positioned between the core block and the rear mold panel, when the side drawing block moves towards one side far away from the rear mold panel, the core block is driven to move towards one side far away from the rear mold panel together, and after the side drawing block is separated from a product, the product is left on the core block, so that the subsequent demolding of the front bumper of the automobile is facilitated;

2. According to the utility model, the hook block and the hook groove are arranged, when the die is opened, the cavity plate moves towards one side far away from the rear die plate along the demolding direction, the hook block on the cavity plate hooks the side rear block to move towards one side far away from the side drawing block, and because the side drawing block moves along the demolding direction inclined to the die, when the hook block drives the side drawing block to move for a certain distance, the hook block is separated from the hook groove, so that the movable die part and the fixed die part of the die are separated;

3. According to the utility model, the first sliding rail is arranged, so that the first sliding block is in sliding connection in the first limiting groove, the sliding direction and the sliding distance of the core block are limited, and the possibility of poor linkage of the side drawing blocks caused by deviation or excessive sliding of the sliding direction of the core block is reduced; when the die is in a die-closing state, the die cavity plate is positioned and limited, so that the possibility that the position of the die cavity plate deviates during die closing or the position of the die cavity plate moves after die closing is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application.

FIG. 2 is a schematic illustration of a core block structure according to an embodiment of the present application.

FIG. 3 is a schematic view of a rear panel mechanism according to an embodiment of the present application.

Fig. 4 is a schematic view of a cavity plate structure according to an embodiment of the present application.

Fig. 5 is an enlarged view taken along a in fig. 4.

Fig. 6 is a schematic structural diagram of a second ejection mechanism according to an embodiment of the present application.

Reference numerals illustrate: 1. a cavity plate; 11. a receiving groove; 12. a chute; 2. a core block; 21. an avoidance groove; 3. a rear mold panel; 31. a cushion block; 32. KO holes; 4. a first ejection mechanism; 41. a side drawing block; 411. a hooking groove; 42. a first limit assembly; 421. a first slide rail; 422. a first limit groove; 423. a first slider; 43. the second limiting component; 431. a second slide rail; 432. the second limit groove; 433. a second slider; 434. t-shaped slide rail; 44. a driving member; 441. a hook block; 442. a spring; 443. a cylinder; 5. a second ejection mechanism; 51. a top plate; 511. a reset lever; 52. a thimble; 53. and (5) a top block.

Detailed Description

The present application will be further described in detail below with reference to fig. 1-6, so that the technical solution of the present application can be more easily understood and mastered.

The embodiment of the application discloses a multistage ejection injection mold for a lower guard plate of an automobile front bumper.

Referring to fig. 1-6, the multistage ejection injection mold for the lower guard plate of the automobile front bumper comprises a cavity plate 1 with a molding surface, a core block 2 with a molding surface, a rear mold panel 3, a plurality of cushion blocks 31 fixedly connected to the rear mold panel 3, a first ejection mechanism 4 and a second ejection mechanism 5, and the first ejection mechanism 4 and the second ejection mechanism 5 sequentially eject products.

Referring to fig. 1-6, the first ejection mechanism 4 includes two side-pulling blocks 41, a first limiting component 42, a second limiting component 43 and a driving component 44, the core block 2 is slidably connected to the cushion block 31 along the demolding direction of the mold, the two side-pulling blocks 41 are located between the cushion block 31 and the core block 2, the two side-pulling blocks 41 are slidably connected to the cushion block 31 along the demolding direction oblique to the mold, two avoidance grooves 21 are formed in the core block 2, the two side-pulling blocks 41 correspond to the two avoidance grooves 21, the two side-pulling blocks 41 are slidably connected to the corresponding avoidance grooves 21 along the demolding direction perpendicular to the mold, the driving component 44 is used for driving the two side-pulling blocks 41 to slide simultaneously, the first limiting component 42 is used for limiting the sliding of the core block 2, and the second limiting component 43 is used for limiting the sliding of the side-pulling blocks 41.

Referring to fig. 1 to 6, the two side drawing blocks 41 are linked with the core block 2, and when the mold is opened, the driving piece 44 drives the two side drawing blocks 41 to slide, so that the two side drawing blocks 41 slide along the demolding direction inclined to the mold respectively, and slide along the demolding direction perpendicular to the mold relative to the core block 2, so that the two side drawing blocks 41 demold the inverted structure on the product; because the side drawing block 41 is located between the core block 2 and the rear mold panel 3, when the two side drawing blocks 41 move towards the side far away from the rear mold panel 3, the core block 2 is driven to move towards the side far away from the rear mold panel 3, and when the side drawing blocks 41 are separated from the product, the product is left on the core block 2, so that the automobile front bumper can be conveniently and subsequently demolded.

Referring to fig. 1-5, the driving member 44 includes four hook blocks 441 and four springs 442, two ends of the two side-pulling blocks 41 in the length direction are respectively provided with a hook slot 411 matching with the hook blocks 441, and the cavity plate 1 is provided with four sliding slots 12; the four hook blocks 441, the four sliding grooves 12, the four hook slots 411 and the four springs 442 are respectively corresponding to each other; the four hook blocks 441 are respectively connected to the corresponding sliding grooves 12 in a sliding manner along a demolding direction perpendicular to the mold, the four springs 442 are respectively located in the corresponding sliding grooves 12, two ends of the four springs 442 are respectively abutted to the side walls of the corresponding sliding grooves 12 and the corresponding hook blocks 441, the four springs 442 always drive the corresponding hook blocks 441 to slide towards the corresponding side drawing blocks 41, and when the mold is in a mold closing state, the four hook blocks 441 are respectively located in the corresponding hook slots 411.

Referring to fig. 1 to 6, when the mold is opened, the cavity plate 1 moves toward a side far from the rear mold panel 3 along the demolding direction, the four hook blocks 441 on the cavity plate 1 hook the corresponding side drawing blocks 41 to move toward a side far from the side drawing blocks 41, and since the two side drawing blocks 41 move along the demolding direction inclined to the mold and toward the corresponding receiving groove 11 side respectively, when the hook blocks 441 drive the side drawing blocks 41 to move a certain distance, the four hook blocks 441 are separated from the hook grooves 411, so that the movable mold part and the fixed mold part of the mold are separated.

Referring to fig. 1-3, the driving member 44 further includes a plurality of air cylinders 443, wherein the air cylinders 443 are fixedly connected to the cushion block 31, and piston rods of the air cylinders 443 are fixedly connected to the core block 2 at one ends thereof. The core block 2 is driven to reciprocate along the demolding direction of the mold by the piston movements of the piston rods on the plurality of cylinders 443, and when the mold is opened, the piston rods on the plurality of cylinders 443 extend out, so that the core block 2 moves towards the side far away from the rear mold panel 3.

Referring to fig. 1-6, the first limiting component 42 includes four first sliding rails 421 and four first sliding blocks 423, the four first sliding rails 421 correspond to the four first sliding blocks 423, the four first sliding rails 421 are respectively and fixedly connected to the cushion block 31, the four first sliding rails 421 are respectively provided with a first limiting groove 422, the four first sliding blocks 423 are fixedly connected to the core block 2, and the four first sliding blocks 423 are slidably connected in the corresponding first limiting grooves 422 along the demolding direction of the mold. The first slider 423 is slidably connected in the first limiting groove 422, which limits the sliding direction and the sliding distance of the core block 2, and reduces the possibility of poor linkage of the side drawing block 41 due to deviation or excessive sliding of the sliding direction of the core block 2.

Referring to fig. 1 to 4, four receiving grooves 11 corresponding to the four first slide rails 421 are formed in the cavity plate 1, and when the mold is in the mold-closed state, one ends of the four first slide rails 421, which are far from the cushion block 31, are respectively engaged with the corresponding receiving grooves 11. When the die is in a die-closing state, the die cavity plate 1 is positioned and limited, so that the possibility that the position of the die cavity plate 1 deviates during die closing or the position of the die cavity plate 1 moves after die closing is reduced.

Referring to fig. 1-6, the second limiting assembly 43 includes four second slide rails 431 and four sets of second slide blocks 433, the four second slide rails 431 correspond to the four sets of second slide blocks 433, the four second slide rails 431 are respectively and fixedly connected to the cushion block 31, the four second slide rails 431 are respectively provided with second limiting grooves 432, the four sets of second slide blocks 433 are respectively and fixedly connected to two ends of the two side drawing blocks 41 in the length direction, each set of second slide blocks 433 includes two second slide blocks 433, and the four sets of second slide blocks 433 are respectively and slidably connected in the second limiting grooves 432 along the sliding direction of the corresponding side drawing blocks 41. The second slider 433 is slidably connected in the second limiting groove 432, so that the sliding direction of the side pulling block 41 is limited, and the possibility that the side pulling block 41 damages the back-off part during demolding due to excessive deviation of the sliding direction of the side pulling block 41 is reduced.

Referring to fig. 1-6, the second limiting component 43 further includes two sets of "T" shaped sliding rails 434, the two sets of "T" shaped sliding rails 434 are respectively and fixedly connected in the two accommodating grooves 11, the two side drawing blocks 41 are respectively and slidably connected on the "T" shaped sliding rails 434 in the corresponding accommodating grooves 11 along the demolding direction perpendicular to the mold, and the two "T" shaped sliding rails 434 are arranged in the same set and are respectively located at two sides of the length direction of the corresponding side drawing blocks 41. The provision of the receiving groove 11 reduces the possibility of interference of the side drawer 41 with the core block 2 when sliding, and the "T" shaped slide rail 434 limits the position and sliding direction of the side drawer 41 on the core block 2.

Referring to fig. 1-6, the second ejection mechanism 5 includes a top plate 51 and a plurality of ejector pins 52, a movable space required by the second ejection mechanism 5 is formed between the plurality of cushion blocks 31, one side of a molding surface of the core block 2 is slidably connected with a plurality of ejector blocks 53 with the molding surface along a mold opening direction of the mold, the top plate 51 is slidably connected with the plurality of cushion blocks 31 along the mold opening direction of the mold, a plurality of reset rods 511 are fixedly connected to the top plate 51, when the mold is in a mold closing state, one end of the plurality of reset rods 511 away from the top plate 51 is respectively abutted against two side extraction blocks 41, the plurality of ejector pins 52 correspond to the plurality of ejector blocks 53, two ends of the plurality of ejector pins 52 in an axial direction are respectively fixedly connected to the top plate 51 and the corresponding ejector blocks 53, a plurality of KO holes 32 are formed in the rear mold surface 3, and the plurality of KO holes 32 are used for allowing a top rod on the injection molding machine to pass through.

Referring to fig. 1 to 6, when the mold is opened, a top rod on the injection molding machine passes through the plurality of KO holes 32 and abuts against the top plate 51, the top plate 51 is pushed by pushing, the ejector pins 52 and the ejector blocks 53 slide to a side far away from the rear mold panel 3, the product left on the core block 2 is ejected, the demolding of the product is completed, and the ejector blocks 53 with molding surfaces are ejected, so that the possibility of damaging the product during ejection can be reduced.

Referring to fig. 1 to 6, as described above, when the mold is opened, the hook blocks 441 on the cavity plate 1 pull the two side drawing blocks 41, so that the two side drawing blocks 41 slide toward the side far from the rear mold panel 3, and when the hook blocks 441 are separated from the hook slots 411, the cavity plate 1 is completely separated from the product, and the ejection of the first section is completed; the plurality of air cylinders 443 continue to drive the core block 2 to slide towards one side far away from the rear die panel 3, the side drawing block 41 is completely separated from the product through the linkage between the core block 2 and the side drawing block 41, the inverted structure part on the product is demolded, the product is left on the core block 2, the contact area between the product and the die is reduced, and the ejection of the second section is completed; the top plate 51 is pushed by a top rod on the injection molding machine, so that the plurality of top blocks 53 slide towards the side far away from the rear mold panel 3, and the product is ejected from the core block 2.

Referring to fig. 1 to 6, when the mold is closed, the cylinder 443 pulls the core block 2 to slide toward a side passing through the rear panel, resets the core block 2, moves the two side extraction blocks 41 toward the rear panel 3 by the linkage between the core block 2 and the two side extraction blocks 41, and moves toward a side away from the corresponding escape groove 21 until reset; in the resetting process of the two side drawing blocks 41, the two side drawing blocks 41 are respectively abutted on the plurality of resetting rods 511 to reset the top plate 51 and the top block 53; when the cavity plate 1 moves toward the rear mold plate 3, the hook pieces 441 are pressed by the corresponding side drawing pieces 41, so that the springs 442 are compressively deformed, and when the cavity plate 1 moves to abut against the cushion blocks 31, the hook pieces 441 face the corresponding hook slots 411, and at this time, the springs 442 are restored to the original state, so that the hook pieces 441 are matched with the corresponding hook slots 411, and the mold clamping of the mold is completed.

Of course, the above is only a typical example of the application, and other embodiments of the application are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the application claimed.

Claims (8)

1. The utility model provides an ejecting injection mold of backplate multistage under car front bumper, includes die cavity board (1) that have the shaping face, core piece (2) and back mould panel (3) that have the shaping face, its characterized in that: still include first ejection mechanism (4) and second ejection mechanism (5), first ejection mechanism (4) and second ejection mechanism (5) are ejecting to the product in proper order, first ejection mechanism (4) are including side take out piece (41), first spacing subassembly (42), second spacing subassembly (43) and driving piece (44), be equipped with cushion (31) on back mould panel (3), the drawing of patterns direction sliding connection of mould is followed in core piece (2) is on cushion (31), side take out piece (41) are located between cushion (31) and core piece (2), side take out piece (41) are along the drawing of patterns direction sliding connection who inclines to the mould on cushion (31), side take out piece (41) are along the drawing of patterns direction sliding connection of perpendicular to mould on core piece (2), driving piece (44) are used for driving the slip that side take out piece (41), first spacing subassembly (42) are used for carrying out spacing to the slip of core piece (2), second is taken out side spacing subassembly (43) and is used for carrying out the slip spacing to side take out piece (41).

2. The automobile front bumper lower guard plate multistage ejection injection mold according to claim 1, wherein: the driving piece (44) comprises a hook block (441) and a spring (442), a hook groove (411) matched with the hook block (441) is formed in the side-drawing block (41), the hook block (441) is slidably connected to the cavity plate (1) along the demolding direction perpendicular to the mold, the spring (442) is arranged on the cavity plate (1), the spring (442) always drives the hook block (441) to slide towards one side of the side-drawing block (41), and when the mold is in a mold closing state, the hook block (441) is located in the hook groove (411).

3. The multi-segment ejection injection mold of the lower guard plate of the automobile front bumper according to claim 2, wherein: the driving piece (44) further comprises an air cylinder (443), the air cylinder (443) is fixedly connected to the cushion block (31), and one end of a piston rod of the air cylinder (443) is fixedly connected to the core block (2).

4. The automobile front bumper lower guard plate multistage ejection injection mold according to claim 1, wherein: the first limiting assembly (42) comprises a first sliding rail (421) and a first sliding block (423), the first sliding rail (421) is fixedly connected to the cushion block (31), a first limiting groove (422) is formed in the first sliding rail (421), the first sliding block (423) is fixedly connected to the core block (2), and the first sliding block (423) is slidably connected in the first limiting groove (422) along the demolding direction of the mold.

5. The multi-segment ejection injection mold for the lower guard plate of the automobile front bumper according to claim 4, wherein: the cavity plate (1) is provided with a containing groove (11), and when the die is in a die closing state, one end of the first sliding rail (421) away from the cushion block (31) is matched with the containing groove (11).

6. The multistage ejection injection mold for the automobile front bumper lower guard plate according to claim 4, wherein the second limiting assembly (43) comprises a second sliding rail (431) and a second sliding block (433), the second sliding rail (431) is fixedly connected to the cushion block (31), a second limiting groove (432) is formed in the second sliding rail (431), the second sliding block (433) is fixedly connected to the side drawing block (41), and the second sliding block (433) is slidably connected in the second limiting groove (432) along the demolding direction of the inclined and mold.

7. The multi-segment ejection injection mold of the lower guard plate of the automobile front bumper according to claim 6, wherein: the second limiting assembly (43) further comprises a T-shaped sliding rail (434), the core block (2) is provided with a containing groove (11), the T-shaped sliding rail (434) is fixedly connected in the containing groove (11), and the side drawing block (41) is slidingly connected on the T-shaped sliding rail (434) along the demoulding direction perpendicular to the mould.

8. The automobile front bumper lower guard plate multistage ejection injection mold according to claim 1, wherein: the second ejection mechanism (5) comprises a top plate (51) and a plurality of ejector pins (52), a plurality of ejector pins (53) with forming surfaces are connected to the core block (2) in a sliding mode along the die opening direction of the die, the top plate (51) is connected to the cushion block (31) in a sliding mode along the die opening direction of the die, the ejector pins (52) correspond to the ejector pins (53), two ends of the axis direction of the ejector pins (52) are fixedly connected to the top plate (51) and the corresponding ejector pins (53) respectively, KO holes (32) are formed in the rear die panel (3), and the KO holes (32) are used for allowing a top rod on an injection molding machine to pass through.