CN112976495B

CN112976495B - Automobile bumper mould with air pumping system

Info

Publication number: CN112976495B
Application number: CN202110187049.2A
Authority: CN
Inventors: 山耀炜
Original assignee: Guangzhou Zhongxin Yanfeng Pio Automobile Exterior Decoration System Co ltd
Current assignee: Guangzhou Zhongxin Yanfeng Pio Automobile Exterior Decoration System Co ltd
Priority date: 2021-02-18
Filing date: 2021-02-18
Publication date: 2022-12-13
Anticipated expiration: 2041-02-18
Also published as: CN112976495A

Abstract

The invention discloses an automobile bumper mould with an air pumping system, which comprises a base, a lower mould, an upper mould, a telescopic rod, a telescopic spring, a rotary tooth, a limiting rack, a vacuum air extractor, an air extracting pipe, an air extracting device, a mould closing device, an injection molding machine and an injection molding device, wherein the lower mould is arranged on the base; the air extractor comprises an abutting block, an abutting groove, an air pressure roller, an air pressure pipe, a pressure release valve, a piston block, a piston spring, an air extracting block, an air extracting spring, an inclined plane groove, a rectangular groove, a pressing roller, a pressure release pipe, a pressure release block, a pressure release hole, a pressure release spring, a triangular groove, a driving wheel and a driving groove; according to the invention, the air exhaust device can exhaust air in the mold cavity after the upper mold and the lower mold are closed, so that air in the injection molding material is exhausted, and the quality of an injection molding finished product is improved; the upper die and the lower die are completely combined after air exhaust through the die closing device, the shape integrity of an injection molding product is prevented, and the qualification rate of the product is improved.

Description

Automobile bumper mould with air pumping system

Technical Field

The invention belongs to the technical field of mold manufacturing, and particularly relates to an automobile bumper mold with an air pumping system.

Background

Automobile bumpers are generally injection molded from plastic; in the prior art, plastics are directly injected into a mold for molding, but air can be generated inside the mold in the injection molding process, so that the injection molding effect is directly influenced; thus affecting the quality of the product.

Disclosure of Invention

The invention provides an automobile bumper mould with an air extraction system, which can improve the injection molding effect in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: the device comprises a base, a lower die arranged on the base, an upper die arranged on the lower die, a telescopic rod arranged at the upper bottom of the upper die, a telescopic spring arranged on the telescopic rod, rotary teeth arranged on the side wall of the lower die, a limit rack arranged on the side edge of the upper die, a vacuum air pump arranged on the upper die, an air exhaust pipe arranged on the upper die, an air exhaust device arranged in the upper die, a mold closing device arranged in the lower die, an injection molding machine arranged on the base and an injection molding device arranged on the lower die; the method is characterized in that: the air extractor comprises a butt-joint block arranged on an upper die, a butt-joint groove arranged on a lower die, an air pressure roller arranged on the lower die, an air pressure pipe arranged in the upper die, a pressure release valve arranged on the air pressure pipe, a piston block arranged in the air pressure pipe, a piston spring arranged on the piston block, an air extracting block arranged at the end part of the air extracting pipe, an air extracting spring arranged on the air extracting block, an inclined plane groove arranged on the air extracting block, a rectangular groove arranged on the inclined plane groove, a pressing wheel arranged on the piston block, a pressure release pipe arranged on the air pressure pipe, a pressure release block arranged in the pressure release pipe, a pressure release hole arranged on the pressure release block, a pressure release spring arranged on the pressure release block, a triangular groove arranged on the pressure release block, a driving wheel arranged on the butt-joint block and a driving groove arranged on the butt-joint groove; the cross section of the butt joint block is rectangular and is arranged at the bottom of the upper die; the butt joint groove is formed in the surface of the lower die and can be abutted against the butt joint block; the air pressure roller is fixedly arranged on the upper end surface of the lower die; the longitudinal section of the air pressure pipe is T-shaped, is arranged in the upper die and can be abutted against the air pressure roller; the pressure relief valve is arranged at the end part of the air pressure pipe and communicated with the outside; the piston block is movably embedded in the air pressure pipe; the piston spring is connected with the piston block and the surface of the air pressure pipe; the air pumping block can be embedded in the air pumping pipe in a way of moving up and down, the side edge of the air pumping block is provided with an air hole, and the end part of the air pumping block is flush with the bottom of the upper die; the air exhaust spring is connected with the air exhaust block and the air exhaust pipe; the longitudinal section of the inclined plane groove is an inclined plane and is arranged on the air pumping block; the rectangular groove is provided with the air pumping block and is positioned above the inclined groove; the pressing wheel is rotatably embedded at the end part of the piston block, can be pressed against the inclined plane groove and is butted with the rectangular groove; one end of the pressure relief pipe is connected with the air pressure pipe, and the other end of the pressure relief pipe is communicated with the outside; the pressure relief block is movably embedded in the pressure relief pipe; the pressure relief hole is formed in the pressure relief block and is positioned in the upper die; the pressure relief spring is connected with the pressure relief block and the upper die; the triangular groove is arranged on the pressure relief block, and the longitudinal section of the triangular groove is triangular; the driving wheel is rotatably and movably embedded on the butt joint block and can abut against the surface of the triangular groove; the driving groove is formed in the butt joint groove and can abut against the driving roller.

When the injection molding is started, the upper mold is moved downwards, so that the butt joint blocks are in butt joint with the butt joint grooves; then the rotating teeth are embedded with the limiting racks; when the upper die moves downwards, the air pressure roller moves in the air pressure pipe, and the generated air pressure drives the piston block to move transversely; then the pressing wheel is driven to move on the inclined plane groove, and the air pumping block is driven to move; so that the air exhaust block enters the die cavity between the upper die and the lower die; starting a vacuum air extractor to extract air in the die, wherein in the process of extracting air, the air pressure in the upper die and the lower die is slowly reduced; the upper die begins to move downwards slowly and automatically; at the moment, the butt joint block slowly approaches to the driving wheel; then when the air is exhausted, the butt joint block is pressed against the driving roller; the pressure relief block is driven to move upwards, and the pressure relief hole is communicated with the air pressure pipe and the pressure relief pipe; further, the air pressure in the air pressure pipe is reduced, and the piston block is reset; at the moment, the air pumping block resets and stops pumping air; then the mold closing device starts to be started, the upper mold is pulled to continuously move downwards, the upper mold and the lower mold are completely combined, and cooling molding is started; the telescopic rod is arranged to realize the stable movement of the upper die moving downwards, so that the die assembly stability is improved, and the injection molding stability is further improved; the automatic limiting is realized when the upper die and the lower die are closed through the arrangement of the rotating teeth and the limiting racks; the upper die and the lower die are prevented from being separated during injection molding, so that the injection molding effect is prevented from being influenced; the arrangement of the butt joint block and the butt joint groove can realize that a sealed cavity is formed between the upper die and the lower die when the die is used for injection molding, so that the air extraction stability is improved, and the injection molding effect is further improved; the pressure relief valve can release the air pressure in the air pressure pipe when the upper die automatically moves, so that the moving stability of the upper die is ensured; meanwhile, the upper die can be ensured to be automatically separated from the lower die; the arrangement of the air exhaust block realizes that air is exhausted between the upper die and the lower die, so that the stability of air exhaust is improved; on the other hand, the mould can be flush with the upper mould during injection molding, so that the surface of a product is prevented from being uneven during injection molding, and the appearance is prevented from being influenced; the arrangement of the inclined plane groove can improve the moving stability of the air extracting block and prevent the air extracting block from being misplaced during moving to cause unstable air suction; the stability of air extraction is improved, and the injection molding effect is further improved; the rectangular groove is arranged, so that the pressing wheel can abut against the air pumping block during air suction, the air pumping block is prevented from being staggered, and the air pumping stability is improved; the pressure relief pipe is arranged to release the air pressure in the air pressure pipe when air suction is finished, so that the air suction block is linked to reset; the flexibility of air exhaust closing is improved, and the stability of air exhaust is further improved; the arrangement of the pressure relief block and the pressure relief hole realizes that the pressure relief block blocks the pressure relief pipe during air extraction to ensure the stability of the air pressure in the air pressure pipe, and further improves the stability of air extraction; on the other hand, the pressure relief hole can be communicated with the air pressure pipe and the pressure relief pipe through the movement of the driving wheel, so that the pressure relief stability is improved, and the air suction closing stability is further improved; thereby improving the injection molding effect.

The mold closing device comprises a pneumatic groove arranged in the lower mold, a vent pipe arranged in the lower mold, a piston rod arranged on the upper mold, and an injection molding machine arranged in the lower mold, wherein plastic is filled into the lower mold through the injection molding device, and after the injection molding is finished; the rotating wheel, the rotating torsion spring arranged on the rotating wheel, a plurality of air pressure plates arranged on the rotating wheel and the pulling mechanism arranged in the lower die; the air pressure groove is arranged in the lower die; one end of the vent pipe is connected with the air pressure groove, and the other end of the vent pipe is communicated with the outside; the piston rod is arranged at the bottom of the upper die and can abut against the air pressure groove; the rotating wheel is rotatably embedded in the lower die; the rotary torsion spring is connected with the rotary wheel and the inner wall of the lower die; the air pressure plate is provided with a plurality of blocks, the air pressure plate is uniformly arranged on the rotating wheel along the circumferential direction of the rotating wheel, and the size of the air pressure plate is the same as the pipe diameter of the vent pipe

During air extraction, the piston rod moves in the air pressure groove, and the generated air pressure drives the air pressure plate to move; then the rotating wheel is driven to rotate, and at the moment, the pulling mechanism starts to start; pulling the upper die to move further downwards; completely combining the upper die and the lower die, and starting molding; because a gap still exists between the upper die and the lower die; by the arrangement of the device, the upper die and the lower die are completely combined after air exhaust is completed; the linkage of air exhaust and mold closing is improved, and the injection molding effect is further improved.

The pulling mechanism comprises an unlocking pipe arranged in the lower die, an unlocking block arranged at one end of the unlocking pipe, a ratchet arranged on the unlocking block, a cache cavity arranged in the lower die, a buffer plate arranged in the cache cavity, a buffer spring arranged on the buffer plate, a limiting block arranged on the inner wall of the cache cavity, a moving block arranged in the unlocking pipe, an embedded groove arranged on the moving block, a driving block arranged at the other end of the unlocking pipe and a pulling rope arranged on the butt-joint block; one end of the unlocking pipe is connected to the side wall of the butt joint groove, and the other end of the unlocking pipe is connected to the inner wall of the vent pipe; the unlocking block is movably embedded in the unlocking pipe and is positioned at one end of the unlocking pipe, which is connected with the vent pipe; the ratchet can be embedded at the end of the unlocking block in a movable way; the buffer cavity is arranged in the lower die and is positioned above the rotating wheel; the buffer plate is movably embedded in the buffer cavity; the buffer spring is arranged at the bottom of the buffer plate; the limiting block can be transversely movably embedded on the inner wall of the cache cavity; the moving block is movably embedded in the unlocking pipe; the embedded groove is arranged on the moving block and can be butted with the limiting block; the driving block is arranged in the unlocking pipe and is positioned at one end of the butt joint groove connected with the unlocking pipe; the driving block can be propped against the butt joint block; one end of the pulling rope is connected with the butt joint block, and the other end of the pulling rope penetrates through the buffer plate; winding on a rotating wheel; the pulling rope is connected with the buffer spring.

When air is pumped out, the movement of the upper die is linked with the rotation of the rotating wheel, so that the pulling rope is wound on the rotating wheel; the buffer spring is further pulled to be lifted, and the buffer plate is blocked by the limiting block at the moment; then, when the air exhaust is finished, the butt joint block is propped against the driving block; further, air pressure is generated in the unlocking pipe to drive the moving block to move, and the limiting block is butted with the embedded groove at the moment; then the buffer spring starts to act, the pulling rope is pulled to pull the butt joint block to move downwards, and the upper die is further butted with the lower die; meanwhile, the unlocking block is driven to move by air pressure, so that the ratchets are in contact with and limited, and the rotating wheel is reset at the moment; the air pressure plate can be limited by the arrangement of the ratchet, so that the rotating wheel is prevented from resetting; the stability of die assembly is improved, and the upper die can move downwards stably after air exhaust is finished; the buffer spring can generate elasticity during air suction through the arrangement of the buffer plate, and then the upper die can automatically move downwards after air suction is finished; the automation of the movement of the upper die is improved, the upper die and the lower die are combined and integrated after air exhaust is finished, and the injection molding effect is further improved; the upper die can be automatically pulled to move by the aid of the buffer spring, so that the merging stability of the upper die and the lower die is improved, and the injection molding stability is further improved.

The injection molding device comprises a piston arranged on the base, a limiting plate arranged on the piston, a limiting spring arranged on the limiting plate, a hydraulic cavity arranged in the lower mold, a hydraulic plate arranged in the hydraulic cavity, a hydraulic spring arranged on the hydraulic plate, an injection molding pipe arranged in the lower mold, an injection molding block arranged in the injection molding pipe, an injection molding spring arranged on the injection molding block and a blocking mechanism arranged in the hydraulic cavity; the piston is fixedly arranged at the upper end of the base; the cross section of the limiting plate is in a ring shape and is movably embedded on the piston; the upper end surface of the limiting plate is fixedly connected with a lower die; the limiting spring is connected with the limiting plate and the base; the hydraulic cavity is arranged in the lower die and is positioned above the piston, and hydraulic oil is stored in the hydraulic cavity and can abut against the piston; the hydraulic plate is movably embedded at the upper end of the hydraulic cavity; the hydraulic spring is connected with the hydraulic plate and the top wall of the hydraulic cavity; the injection molding pipe is arranged in the lower die and is in butt joint with an injection molding machine; the injection molding block is movably embedded at the end part of the injection molding pipe, and an opening is formed in the side edge of the injection molding block; and the end part of the injection molding block can be flush with the surface of the lower die; the injection molding spring is connected with the injection molding block and the inner wall of the injection molding pipe

After the injection molding machine is started, the plastic is flushed into the cavities of the upper mold and the lower mold from the injection molding pipe; at the moment, the injection molding block moves upwards; along with the injection molding of plastics, the weight of the lower die is increased, and the lower die is driven to move downwards; then the piston extrudes the hydraulic oil in the hydraulic cavity, and the hydraulic plate is driven to move under the action of hydraulic pressure; when the injection molding is finished, the blocking mechanism is started to block the injection molding pipe, and the injection molding block is reset by a further injection molding spring; the driving stability of the blocking mechanism can be improved through the arrangement of the piston and the hydraulic cavity, and the injection molding stability is further improved; the shape of the hydraulic cavity can be changed through the arrangement of the hydraulic plate and the hydraulic spring, the hydraulic pressure is ensured to be unchanged, and therefore the starting of the blocking mechanism can be automatically started; the integrity of plastic injection molding is ensured, and the injection molding effect is improved; on one hand, the injection molding blocks enter cavities of the upper mold and the lower mold during injection molding, so that the injection molding stability is improved; on the other hand, the injection molding pipe can be sealed during molding, so that the molded shape and the appearance are smooth; the injection molding machine realizes the quick stop of injection molding when the injection molding is finished by the arrangement of the blocking mechanism, prevents the waste of plastics and improves the effect of injection molding.

The blocking mechanism comprises two blocking blocks arranged in a hydraulic cavity, a blocking spring arranged on the blocking blocks, a hook plate arranged at the end part of the blocking blocks, a limiting wheel arranged on the hydraulic cavity, a limiting tooth arranged on the limiting wheel, a limiting torsion spring arranged in the limiting wheel, a limiting groove arranged on the limiting wheel, an unlocking plate arranged in the hydraulic cavity and a torsion spring arranged on the unlocking plate; the blocking blocks can be transversely movably embedded in the hydraulic cavity, and the two-degree blocking blocks can be combined with the sealing injection molding pipe; the blocking spring is connected with the blocking block and the inner wall of the hydraulic cavity; the hook plate is arranged at one end of the blocking block, and a hook which can be buckled with the limiting tooth is arranged at one end of the hook plate, which is far away from the blocking block; the limiting wheel is rotatably embedded on the inner wall of the hydraulic cavity; the cross section of the limiting tooth is crescent, is arranged on the limiting wheel and can be buckled with the enough plate; the limiting torsion spring is connected with the limiting wheel and the inner wall of the hydraulic cavity; the limiting groove is formed in the limiting wheel; the longitudinal section of the unlocking plate is Z-shaped and can be selectively and rotatably embedded in the inner wall of the hydraulic cavity; one end of the piston can be butted with the limiting groove, and the other end of the piston can be butted with the piston; the first torsion spring connects the unlocking plate and the inner wall of the hydraulic chamber.

When the injection molding is finished, the piston is abutted against one end of the unlocking plate; then under the action of a lever principle, the unlocking plate rotates around the first torsion spring, so that the other end of the unlocking plate is separated from the limiting groove; then the blocking block is driven to move under the hydraulic pressure, and the hook plate drives the limiting teeth to rotate at the moment, so that unlocking is realized; at the moment, the two blocking plates are butted to realize blocking; the injection molding pipe can be blocked by the blocking block, so that the injection molding is prevented from being continued after the injection molding reaches the standard, and the injection molding stability is improved; the hook plate can be automatically buckled with the limiting teeth according to the movement of the blocking block, so that self-locking is realized; the blocking block is further prevented from being started by mistake during injection molding, so that the injection molding effect is reduced, and the injection molding stability is improved; the hook plate can be automatically limited and automatically unhooked through the arrangement of the limiting wheel and the limiting teeth, so that the moving stability of the blocking plate is further improved; thereby leading the injection molding to be more stable and safer; the limit of the blocking block can be automatically unlocked after the injection molding reaches the standard through the arrangement of the unlocking plate; thereby leading the injection molding to be stopped quickly and preventing the injection molding from continuing; the injection molding stability is improved, and the product quality is further improved.

In conclusion, the invention has the following advantages: the invention has simple mechanism and good injection molding effect, and can exhaust air in the mold closing process to improve the injection molding effect; the quality of the product is further improved; the injection molding device can stop injection molding quickly after the injection molding reaches the standard, so that the problem that the quality level of the product is not uniform due to excessive injection molding is avoided, and the consistency of the product is improved; the mold closing device can be combined with the air exhaust device, and the mold is further closed after air is exhausted, so that the injection molding effect is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a left side view of the present invention.

Fig. 4 isbase:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A of fig. 2 of the present invention.

Fig. 5 is a cross-sectional view taken along B-B of fig. 3 of the present invention.

FIG. 6 is a partial view of the invention at A.

FIG. 7 is a partial view of the invention at B.

FIG. 8 is a partial view at C of the drawing of the present invention.

Fig. 9 is a partial view at D of the drawing of the present invention.

Fig. 10 is an exploded view of the present invention.

Detailed Description

As shown in fig. 1-10, an automobile bumper mold with an air pumping system comprises a base 1, a lower mold 2, an upper mold 3, a telescopic rod 31, a telescopic spring 32, a rotary tooth 21, a limit rack 33, a vacuum air pump 34, an air pumping pipe 35, an air pumping device 4, a mold closing device 5, an injection molding machine 11 and an injection molding device 6; the air suction device 4 comprises a butt joint block 41, a butt joint groove 42, an air pressure roller 43, an air pressure pipe 44, a pressure release valve 499, a piston block 45, a piston spring 46, an air suction block 47, an air suction spring 48, an inclined plane groove 49, a rectangular groove 490, a pressing wheel 491, a pressure release pipe 492, a pressure release block 493, a pressure release hole 494, a pressure release spring 495, a triangular groove 496, a driving wheel 497 and a driving groove 498; the lower die 2 is arranged above the base 1 and is connected with the base 1 through an injection molding device 6; the upper die 3 is movably embedded on the lower die 2; one end of the telescopic rod 31 is fixedly arranged at the bottom of the upper die 3, and the other end of the telescopic rod is movably embedded on the lower die 2; the telescopic spring 32 is arranged on the telescopic rod 31 and can be abutted against the upper die 3 and the lower die 2; the rotating teeth 32 are rotatably embedded on the side edge of the lower die 2 and connected with the lower die 2 by adopting a torsion spring; the limiting rack 33 is arranged on the side edge of the upper die 3 and can be buckled with the rotating teeth 21; the vacuum air pump 34 is arranged on the upper die 3 and is directly purchased from the market; the air exhaust device 4 is arranged in the upper die 3; the mold closing device 5 is arranged in the lower mold 2; the injection molding machine 11 is arranged on the base 1 and is directly purchased from the market; the injection molding device 6 is arranged in the lower mold 2; the cross section of the butted block 41 is rectangular and is arranged at the bottom of the upper die 3; the butt joint groove 42 is arranged on the surface of the lower die 2 and can be abutted against the butt joint block 41; the air pressure roller 43 is fixedly arranged on the upper end surface of the lower die 2; the longitudinal section of the pneumatic tube 44 is T-shaped, is arranged in the upper die 3 and can be propped against the pneumatic roller 43; the pressure relief valve 499 is arranged at the end part of the pneumatic tube 44 and communicated with the outside; the piston block 45 is movably embedded in the pneumatic tube 44; the piston spring 46 is connected with the piston block 45 and the surface of the air pressure pipe 44; the air pumping block 47 can be embedded in the air pumping pipe 35 in a way of moving up and down, the side edge of the air pumping block 47 is provided with an air hole, and the end part of the air pumping block 47 is flush with the bottom of the upper die 3; the air exhaust spring 48 is connected with the air exhaust block 47 and the air exhaust pipe 35; the longitudinal section of the inclined plane groove 49 is an inclined plane and is arranged on the air exhaust block 47; the rectangular groove 490 is formed on the air exhaust block 47 and is positioned above the inclined groove 49; the pressing wheel 491 is rotatably embedded at the end part of the piston block 45, can be pressed against the inclined plane groove 49 and is butted with the rectangular groove 490; one end of the pressure relief pipe 492 is connected with the air pressure pipe 44, and the other end is communicated with the outside; the pressure relief block 493 is movably embedded in the pressure relief pipe 492; the pressure relief hole 494 is opened in the pressure relief block 493, and the pressure relief hole 494 is located inside the upper die 3; the pressure relief spring 495 is connected with the pressure relief block 493 and the upper die 3; the triangular groove 496 is arranged on the pressure relief block 493, and the longitudinal section of the triangular groove is triangular; the driving wheel 497 is rotatably and movably embedded on the butt joint block 41, and the driving wheel 497 can abut against the surface of the triangular groove 496; the driving wheel 497 is connected with the docking block 41 by a spring; the driving groove 498 is disposed on the docking groove 42 and can abut against the driving roller 497.

As shown in fig. 4, the mold clamping device 5 includes a pneumatic groove 51, a vent pipe 52, a piston rod 53, a rotary wheel 54, a rotary torsion spring 55, a pneumatic plate 56, and a pulling mechanism 7; the air pressure groove 51 is arranged in the lower die 2; one end of the vent pipe 52 is connected with the air pressure groove 51, and the other end is communicated with the outside; the piston rod 53 is arranged at the bottom of the upper die 3 and can be abutted against the air pressure groove 51; the rotating wheel 54 is rotatably embedded in the lower mold 2; the rotary torsion spring 55 is connected with the rotary wheel 54 and the inner wall of the lower die 2; the air pressure plates 56 are uniformly arranged on the rotating wheel 54 along the circumferential direction of the rotating wheel 54, and the size of the air pressure plates 56 is the same as the pipe diameter of the air pipe 52.

As shown in fig. 8, the pulling mechanism 7 includes an unlocking tube 71, an unlocking block 72, a ratchet 73, a buffer cavity 74, a buffer plate 75, a buffer spring 76, a limiting block 77, a moving block 78, a mutually-embedded groove 79, a driving block 791, and a pulling rope 792; one end of the unlocking pipe 71 is connected with the side wall of the butt joint groove 42, and the other end is connected with the inner wall of the vent pipe 52; the unlocking block 72 is movably embedded in the unlocking pipe 71 and is positioned at one end of the unlocking pipe 71, which is connected with the vent pipe 52; the unlocking block 72 is connected with the inner wall of the breather pipe 52 by a spring; the ratchet teeth 73 can be movably embedded at the end part of the unlocking block 72; the buffer cavity 74 is arranged in the lower die 2 and is positioned above the rotating wheel 54; the buffer plate 75 is movably embedded in the buffer cavity 74; the buffer spring 76 is arranged at the bottom of the buffer plate 75; the limiting block 77 can be transversely movably embedded on the inner wall of the buffer cavity 74 and is connected with the inner wall of the buffer cavity 74 through a spring; the moving block 78 is movably embedded in the unlocking pipe 71, and the inner wall of the unlocking pipe 71 is connected with a spring; the embedding groove 79 is arranged on the moving block 78 and can be butted with the limit block 77; the driving block 791 is arranged in the unlocking pipe 71 and is positioned at one end, connected with the butt joint groove 42, of the unlocking pipe 71; the driving block 791 can abut against the abutting block 41; one end of the pulling rope 792 is connected with the butt-joint block 41, and the other end of the pulling rope 792 penetrates through the buffer plate 75; wound on a rotating wheel 54; the pull string 792 is coupled to the damper spring 76.

As shown in fig. 5, the injection molding device 6 includes a piston 61, a limit plate 62, a limit spring 63, a hydraulic cavity 64, a hydraulic plate 65, a hydraulic spring 66, an injection molding tube 67, an injection molding block 68, an injection molding spring 69, and a blocking mechanism 8; the piston 61 is fixedly arranged at the upper end of the base 1; the cross section of the limiting plate 62 is annular and movably embedded on the piston 61; the upper end face of the limiting plate 62 is fixedly connected with the lower die 2; the limiting spring 63 is connected with the limiting plate 62 and the base 1; the hydraulic cavity 64 is arranged in the lower die 2 and is positioned above the piston 61, and hydraulic oil is stored in the hydraulic cavity and can be abutted against the piston 61; the hydraulic plate 65 is movably embedded in the upper end of the hydraulic cavity 64; the hydraulic spring 66 is connected with the hydraulic plate 65 and the top wall of the hydraulic cavity 64; the injection pipe 67 is arranged in the lower die 2 and is butted with the injection molding machine 11; the injection molding block 68 is movably embedded in the end part of the injection molding pipe 67, and an opening is formed in the side edge of the injection molding block 68; and the end part of the injection molding block 68 can be flush with the surface of the lower die 2; the injection spring 69 connects the injection block 68 and the inner wall of the injection pipe 67.

As shown in fig. 9, the blocking mechanism 8 includes a blocking block 81, a blocking spring 82, a hook plate 83, a limiting wheel 84, a limiting tooth 85, a limiting torsion spring 86, a limiting groove 87, an unlocking plate 88, and a first torsion spring 89; the blocking block 81 can be transversely movably embedded in the hydraulic cavity 64, and the two-degree blocking block 81 can be combined with the sealing injection molding pipe 67; the blocking spring 82 is connected with the blocking block 81 and the inner wall of the hydraulic cavity 64; the hook plate 83 is arranged at one end of the blocking block 81, and a hook which can be buckled with the limit tooth 85 is arranged at one end of the hook plate 83 far away from the blocking block 81; the limiting wheel 84 is rotatably embedded on the inner wall of the hydraulic cavity 64; the cross section of the limiting tooth 85 is crescent, is arranged on the limiting wheel 84 and can be buckled with the enough plate 83; the limiting torsion spring 86 is connected with the limiting wheel 84 and the inner wall of the hydraulic cavity 64; the limiting groove 87 is formed in the limiting wheel 84; the longitudinal section of the unlocking plate 88 is Z-shaped and can be selectively and rotatably embedded on the inner wall of the hydraulic cavity 64; one end can be butted with the limit groove 87, and the other end can be butted with the piston 61; the first torsion spring 89 connects the unlocking plate 88 and the inner wall of the hydraulic chamber 64.

The specific implementation process is as follows: when the injection molding is started, the upper die 3 is moved downwards, so that the butt joint block 41 is butted with the butt joint groove 42; then the rotating teeth 21 are embedded with the limiting racks 33; after the injection molding machine 11 is started, the plastic is flushed into the cavities of the upper mold 3 and the lower mold 2 from the injection molding pipe 67; the injection block 68 now moves upward; along with the injection molding of plastics, the weight of the lower die 2 is increased, and the lower die 2 is driven to move downwards; then the piston 61 presses the hydraulic oil in the hydraulic cavity 64, and at the moment, the hydraulic plate 65 is driven to move under the action of hydraulic pressure; when the upper die 3 moves downwards, the air pressure roller 43 moves in the air pressure pipe 44, and the generated air pressure drives the piston block 45 to move transversely; then, the pressing wheel 491 is driven to move on the inclined plane groove 49 to drive the air exhaust block 47 to move; so that the air exhaust block enters the die cavity between the upper die 3 and the lower die 2; starting the vacuum air extractor 34 to extract air in the mold, wherein the air pressure in the upper mold 3 and the lower mold 2 is slowly reduced in the air extraction process; so far, the upper die 3 starts to move downwards slowly and automatically; at this time, the docking block 41 slowly approaches the driving wheel 497; then, when the air is exhausted, the butting block 41 is abutted against the driving roller 497; the pressure relief block 493 is driven to move upwards, and the pressure relief hole 494 is communicated with the air pressure pipe 44 and the pressure relief pipe 492; further reduction of the air pressure in the air pressure tube 44, the piston block 45 is reset; at this time, the air pumping block 47 is reset, and air pumping is stopped; during air extraction, the piston rod 53 moves in the air pressure groove 51, and the generated air pressure drives the air pressure plate 56 to move; then the rotating wheel 54 is driven to rotate; thereby causing the pull cord 792 to wrap around the rotating wheel 54; further pulling the buffer spring 76 to lift, at this time, the buffer plate 75 is blocked by the limiting block 77; at this time, the injection molding is completed, and the piston 61 abuts against one end of the unlocking plate 88; then, under the action of the lever principle, the unlocking plate 88 rotates around the first torsion spring 89, so that the other end of the unlocking plate 88 is separated from the limit groove 87; then the blocking block 81 is driven to move under the hydraulic pressure, and at the moment, the hook plate 83 drives the limiting teeth 85 to rotate, so that the unlocking is realized; at the moment, the two blocking plates 81 are butted to realize blocking; when the air exhaust is completed, the butt joint block 41 is abutted against the driving block 791; further, air pressure is generated in the unlocking pipe 71 to drive the moving block 78 to move, and at the moment, the limiting block 77 is in butt joint with the embedded groove 79; then the buffer spring 76 starts to act, the pulling rope 792 is pulled to pull the butt joint block 41 to move downwards, and the upper die 3 is further butted with the lower die 2; meanwhile, the unlocking block 72 is driven to move by air pressure, so that the ratchet 73 is in contact with the limit, and the rotating wheel 54 is reset; and the upper die 3 and the lower die 2 are combined to finish the cooling forming.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An automobile bumper mould with an air pumping system comprises a base (1), a lower mould (2) arranged on the base (1), an upper mould (3) arranged on the lower mould (2), an expansion rod (31) arranged at the upper bottom of the upper mould (3), an expansion spring (32) arranged on the expansion rod (31), a rotating tooth (21) arranged on the side wall of the lower mould (2), a limit rack (33) arranged on the side edge of the upper mould (3), a vacuum air pump (34) arranged on the upper mould (3), an air pumping pipe (35) arranged on the upper mould (3), an air pumping device (4) arranged in the upper mould (3), a mold closing device (5) arranged in the lower mould (2), an injection molding machine (11) arranged on the base (1), and an injection molding device (6) arranged on the lower mould (2); the method is characterized in that: the air extracting device (4) comprises a butt joint block (41) arranged on the upper die (3), a butt joint groove (42) arranged on the lower die (2), an air pressure roller (43) arranged on the lower die (2), an air pressure pipe (44) arranged in the upper die (3), a pressure release valve (499) arranged on the air pressure pipe (44), a piston block (45) arranged in the air pressure pipe (44), a piston spring (46) arranged on the piston block (45), an air extracting block (47) arranged at the end part of the air extracting pipe (35), an air extracting spring (48) arranged on the air extracting block (47), and an inclined groove (49) arranged on the air extracting block (47), the device comprises a rectangular groove (490) arranged on the inclined plane groove (49), a pressing wheel (491) arranged on the piston block (45), a pressure relief pipe (492) arranged on the air pressure pipe (44), a pressure relief block (493) arranged in the pressure relief pipe (492), a pressure relief hole (494) arranged on the pressure relief block (493), a pressure relief spring (495) arranged on the pressure relief block (493), a triangular groove (496) arranged on the pressure relief block (493), a driving wheel (497) arranged on the butt-joint block (41), and a driving groove (498) arranged on the butt-joint groove (42); the cross section of the butt joint block (41) is rectangular and is arranged at the bottom of the upper die (3); the butt joint groove (42) is arranged on the surface of the lower die (2) and can be abutted against the butt joint block (41); the air pressure roller (43) is fixedly arranged on the upper end surface of the lower die (2); the longitudinal section of the air pressure pipe (44) is T-shaped, is arranged in the upper die (3) and can be abutted against the air pressure roller (43); the pressure relief valve (499) is arranged at the end part of the air pressure pipe (44) and communicated with the outside; the piston block (45) is movably embedded in the pneumatic tube (44); the piston spring (46) is connected with the surface of the piston block (45) and the air pressure pipe (44); the air pumping block (47) can be embedded in the air pumping pipe (35) in a way of moving up and down, the side edge of the air pumping block (47) is provided with an air hole, and the end part of the air pumping block (47) is flush with the bottom of the upper die (3); the air exhaust spring (48) is connected with the air exhaust block (47) and the air exhaust pipe (35); the longitudinal section of the inclined plane groove (49) is an inclined plane and is arranged on the air exhaust block (47); the rectangular groove (490) is formed on the air pumping block (47) and is positioned above the inclined groove (49); the pressing wheel (491) is rotatably embedded at the end part of the piston block (45), can be pressed against the inclined plane groove (49) and is butted with the rectangular groove (490); one end of the pressure relief pipe (492) is connected with the air pressure pipe (44), and the other end of the pressure relief pipe is communicated with the outside; the pressure relief block (493) is movably embedded in the pressure relief pipe (492); the pressure relief hole (494) is formed in the pressure relief block (493), and the pressure relief hole (494) is positioned in the upper die (3); the pressure relief spring (495) is connected with the pressure relief block (493) and the upper die (3); the triangular groove (496) is arranged on the pressure relief block (493), and the longitudinal section of the triangular groove is triangular; the driving wheel (497) is rotatably and movably embedded on the butt joint block (41), and the driving wheel (497) can abut against the surface of the triangular groove (496); the driving groove (498) is opened on the butt joint groove (42) and can be abutted against the driving wheel (497).

2. The automotive bumper mold with air extraction system of claim 1, wherein: the mold closing device (5) comprises an air pressure groove (51) arranged in the lower mold (2), an air pipe (52) arranged in the lower mold (2), a piston rod (53) arranged on the upper mold (3), a rotating wheel (54) arranged in the lower mold (2), a rotating torsion spring (55) arranged on the rotating wheel (54), a plurality of air pressure plates (56) arranged on the rotating wheel (54), and a pulling mechanism (7) arranged in the lower mold (2); the air pressure groove (51) is arranged in the lower die (2); one end of the vent pipe (52) is connected with the air pressure groove (51), and the other end is communicated with the outside; the piston rod (53) is arranged at the bottom of the upper die (3) and can be abutted against the air pressure groove (51); the rotating wheel (54) is rotatably embedded in the lower die (2); the rotary torsion spring (55) is connected with the rotary wheel (54) and the inner wall of the lower die (2); the air pressure plates (56) are uniformly arranged on the rotating wheel (54) along the circumferential direction of the rotating wheel (54), and the size of the air pressure plates (56) is the same as the pipe diameter of the air pipe (52).

3. The mold for automobile bumper with air extraction system according to claim 2, characterized in that: the pulling mechanism (7) comprises an unlocking pipe (71) arranged in the lower die (2), an unlocking block (72) arranged at one end of the unlocking pipe (71), ratchets (73) arranged on the unlocking block (72), a buffer cavity (74) arranged in the lower die (2), a buffer plate (75) arranged in the buffer cavity (74), a buffer spring (76) arranged on the buffer plate (75), a limiting block (77) arranged on the inner wall of the buffer cavity (74), a moving block (78) arranged in the unlocking pipe (71), an embedded groove (79) arranged on the moving block (78), a driving block (791) arranged at the other end of the unlocking pipe (71) and a pulling rope (792) arranged on the butt-joint block (41); one end of the unlocking pipe (71) is connected with the side wall of the butt joint groove (42), and the other end of the unlocking pipe is connected with the inner wall of the vent pipe (52); the unlocking block (72) is movably embedded in the unlocking pipe (71) and is positioned at one end of the unlocking pipe (71) connected with the vent pipe (52); the ratchet (73) can be embedded at the end part of the unlocking block (72) in a universal moving way; the buffer cavity (74) is arranged in the lower die (2) and is positioned above the rotating wheel (54); the buffer plate (75) is movably embedded in the buffer cavity (74); the buffer spring (76) is arranged at the bottom of the buffer plate (75); the limiting block (77) can be transversely movably embedded on the inner wall of the buffer cavity (74); the moving block (78) is movably embedded in the unlocking pipe (71); the embedded groove (79) is arranged on the moving block (78) and can be butted with the limiting block (77); the driving block (791) is arranged in the unlocking pipe (71) and is positioned at one end, connected with the butt joint groove (42), of the unlocking pipe (71); the driving block (791) can be propped against the butting block (41); one end of the pulling rope (792) is connected with the butt joint block (41), and the other end of the pulling rope (792) penetrates through the buffer plate (75); wound on a rotating wheel (54); the pull cord (792) is connected to a buffer spring (76).

4. The automobile bumper mold with air extraction system of claim 3, wherein: the injection molding device (6) comprises a piston (61) arranged on the base (1), a limiting plate (62) arranged on the piston (61), a limiting spring (63) arranged on the limiting plate (62), a hydraulic cavity (64) arranged in the lower mold (2), a hydraulic plate (65) arranged in the hydraulic cavity (64), a hydraulic spring (66) arranged on the hydraulic plate (65), an injection molding pipe (67) arranged in the lower mold (2), an injection molding block (68) arranged in the injection molding pipe (67), an injection molding spring (69) arranged on the injection molding block (68), and a blocking mechanism (8) arranged in the hydraulic cavity (64); the piston (61) is fixedly arranged at the upper end of the base (1); the cross section of the limiting plate (62) is annular, and the limiting plate is movably embedded on the piston (61); the upper end surface of the limiting plate (62) is fixedly connected with the lower die (2); the limiting spring (63) is connected with the limiting plate (62) and the base (1); the hydraulic cavity (64) is arranged in the lower die (2) and is positioned above the piston (61), and hydraulic oil is stored in the hydraulic cavity and can be abutted against the piston (61); the hydraulic plate (65) is movably embedded at the upper end of the hydraulic cavity (64); the hydraulic spring (66) is connected with the hydraulic plate (65) and the top wall of the hydraulic cavity (64); the injection molding pipe (67) is arranged in the lower die (2) and is butted with the injection molding machine (11); the injection molding block (68) is movably embedded in the end part of the injection molding pipe (67), and an opening is formed in the side edge of the injection molding block (68); and the end part of the injection molding block (68) can be flush with the surface of the lower die (2); the injection molding spring (69) is connected with the injection molding block (68) and the inner wall of the injection molding pipe (67).

5. The automobile bumper mold with air extraction system of claim 4, wherein: the blocking mechanism (8) comprises two blocking blocks (81) arranged in a hydraulic cavity (64), a blocking spring (82) arranged on the blocking blocks (81), a hook plate (83) arranged at the end part of the blocking blocks (81), a limiting wheel (84) arranged on the hydraulic cavity (64), a limiting tooth (85) arranged on the limiting wheel (84), a limiting torsion spring (86) arranged in the limiting wheel (84), a limiting groove (87) arranged on the limiting wheel (84), an unlocking plate (88) arranged in the hydraulic cavity (64) and a first torsion spring (89) arranged on the unlocking plate (88); the blocking block (81) can be transversely movably embedded in the hydraulic cavity (64), and the two-degree blocking block (81) can be combined with the sealing injection molding pipe (67); the blocking spring (82) is connected with the blocking block (81) and the inner wall of the hydraulic cavity (64); the hook plate (83) is arranged at one end of the blocking block (81), and a hook which can be buckled with the limiting tooth (85) is arranged at one end of the hook plate (83) far away from the blocking block (81); the limiting wheel (84) is rotatably embedded on the inner wall of the hydraulic cavity (64); the cross section of the limiting tooth (85) is crescent, is arranged on the limiting wheel (84), and can be buckled with the enough plate (83); the limiting torsion spring (86) is connected with the limiting wheel (84) and the inner wall of the hydraulic cavity (64); the limiting groove (87) is formed in the limiting wheel (84); the longitudinal section of the unlocking plate (88) is Z-shaped and can be selectively and rotatably embedded on the inner wall of the hydraulic cavity (64); one end of the piston can be butted with the limit groove (87), and the other end of the piston can be butted with the piston (61); the first torsion spring (89) connects the unlocking plate (88) and the inner wall of the hydraulic chamber (64).