CN215703790U

CN215703790U - Injection molding and demolding mechanism for automobile exterior trimming parts

Info

Publication number: CN215703790U
Application number: CN202121597372.9U
Authority: CN
Inventors: 帖德成; 胥忠军; 陈春进
Original assignee: Yancheng Jinde Automobile Parts Co ltd
Current assignee: Yancheng Jinde Automobile Parts Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-02-01
Anticipated expiration: 2031-07-14

Abstract

The utility model discloses an injection molding and demolding mechanism for automobile exterior trimming parts, which comprises an injection mold A and an injection mold B, wherein the injection mold A is arranged on the front side of the injection mold B, a molding block is arranged at the center of the front end of the injection mold B, a demolding groove with a backward opening is arranged in the rear end of the injection mold B, a demolding device is arranged in the demolding groove, a rear baffle is arranged at the rear end of the injection mold B, a novel demolding auxiliary device is additionally arranged outside the rear half section of a demolding guide rod of the injection molding and demolding mechanism for the automobile exterior trimming parts, the novel demolding auxiliary device can play an auxiliary role when the demolding device demolds the injection molded finished automobile exterior trimming parts, so that the demolding device can more quickly and accurately demold the injection molded automobile exterior trimming parts, and the phenomenon that the automobile exterior trimming parts are easy to adhere during demolding can be avoided, this can increase the efficiency of demoulding the automobile exterior trim.

Description

Injection molding and demolding mechanism for automobile exterior trimming parts

Technical Field

The utility model belongs to the related technical field of molds, and particularly relates to an injection molding and demolding mechanism for an automobile exterior trimming part.

Background

A plastic mould is a tool matched with a plastic forming machine in the plastic processing industry to endow plastic products with complete configuration and accurate size, and because of various plastic varieties and processing methods, the structures of the plastic forming machine and the plastic products are various, so the types and the structures of the plastic moulds are also various, the demoulding treatment is to prevent the formed composite material products from being adhered on the moulds, and a type of isolating film is applied between the products and the moulds, so the products are easy to be released from the moulds, the surface quality of the products and the integrity of the moulds are ensured at the same time, and a type of isolating film is applied between the products and the moulds to prevent the formed composite material products from being adhered on the moulds, so the products are easy to be released from the moulds, and the surface quality of the products and the integrity of the moulds are ensured at the same time.

The prior injection molding and demolding mechanism for the automobile exterior trimming parts has the following problems: when the existing injection and demolding mechanism for the automobile exterior trimming part is used, firstly, hot-melt plastic is cooled and molded in a molding cavity in an injection mold, the automobile exterior trimming part after being cooled and molded is separated from the mold through the demolding mechanism when the injection mold is opened, the automobile exterior trimming part after being cooled and molded needs to be sleeved outside a molding block and cooled and molded into a complete automobile exterior trimming part according to the shape of the molding block, when in demolding, the demolding mechanism needs to push forwards a finished automobile exterior trimming part sleeved outside the molding block, so that the automobile exterior trimming part molded outside the molding block is separated from the molding block, thereby completing demolding operation, but the automobile exterior trimming part outside the molding block is easy to be adhered with the molding block, so when the mechanism pushes the automobile exterior trimming part forwards for demolding, because the automobile exterior trimming part and the molding block are adhered, the adhered part is easily torn or deformed, and the molding efficiency of the injection mold is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an injection molding and demolding mechanism for an automobile exterior trimming part, which aims to solve the problem that when demolding is carried out, the demolding mechanism needs to push a finished product of the automobile exterior trimming part sleeved outside a molding block forwards, so that the automobile exterior trimming part molded outside the molding block is separated from the molding block, and demolding operation is finished.

In order to achieve the purpose, the utility model provides the following technical scheme: an injection molding and demolding mechanism for automobile exterior trim parts comprises an injection mold A and an injection mold B, wherein the injection mold A is installed on the front side of the injection mold B, a molding block is arranged at the center of the front end of the injection mold B, a demolding groove with a backward opening is formed in the rear end of the injection mold B, a demolding device is arranged in the demolding groove, a rear baffle is arranged at the rear end of the injection mold B, the demolding device comprises a demolding guide hole, a sealing inner embedded groove, a demolding head, a demolding guide rod, a demolding push plate, a sliding guide rod, an outer connecting seat, an outer through hole and a sliding guide hole, the sealing inner embedded groove is formed in the center of the front end of the molding block, the demolding guide hole is formed in the rear end of the sealing inner embedded groove, the demolding head is embedded in the sealing inner embedded groove, the demolding guide rod penetrates through the demolding guide hole, and the front end of the demolding guide rod is fixedly connected with the demolding head, the demolding device comprises a demolding groove, a demolding push plate, a rear baffle, a rear section of the demolding push plate, an external connecting seat, an external connecting through hole, a demolding auxiliary device, a pneumatic hole and a connecting type pushing spring, a fixing ring, a rubber sealing ring and a pneumatic hole, wherein the opening of the pneumatic hole is embedded backwards in the inner wall of the front end of the demolding groove, the pneumatic hole is communicated with the interior of the demolding groove, the demoulding guide rod is close to the circular outside of rear side and has cup jointed solid fixed ring, gu fixed ring's circular outside has cup jointed rubber seal, gu be provided with the connection type between fixed ring and the drawing of patterns push pedal and promote the spring, connection type promotes the spring cup joint in the circular outside of demoulding guide rod.

Preferably, the injection mold A is provided with moving guide holes penetrating through the inner parts of the four corners close to the four corners, the outer wall of the center of the front end of the injection mold A is provided with an injection molding opening, the outer wall of the front end of the injection mold B close to the four corners is provided with moving guide pillars, and the front ends of the four moving guide pillars correspondingly penetrate through the inner parts of the four moving guide holes respectively.

Preferably, the inside shaping groove that is provided with inside sunken in injection mould A rear end center department, the outside in shaping groove is provided with annular seal groove, the circular outside of shaping piece is provided with the ring seal cover, the ring seal cover passes through welded connection on injection mould B's front end outer wall.

Preferably, the cross sectional shape of shaping groove and shaping piece is the same, the thickness and the cross sectional area that do not are greater than the shaping piece are equallyd divide to the degree of depth and the cross sectional area in shaping groove, the shaping piece is embedded to the inside space between the two of shaping inslot and is formed into the die cavity, the ring seal cover can be complete embedded in the inside of ring seal groove.

Preferably, the cross-sectional shapes and the area sizes of the injection mold A and the injection mold B are the same, the outer wall of the rear end of the injection mold A can be completely attached to the outer wall of the front end of the injection mold B, and the depth of the demolding groove is two thirds of the thickness of the injection mold B.

Preferably, the circular outer wall of the sliding guide rod and the circular inner wall of the sliding guide hole are both polished, the circular inner wall of the sliding guide hole is attached to the circular outer wall of the sliding guide rod, and the demolding push plate can slide back and forth outside the sliding guide rod through the sliding guide hole.

Preferably, the demolding head can be completely embedded in the sealing embedded groove in a sealing mode, and the outer wall of the front end of the demolding head is flush with the outer wall of the front end of the forming block after the demolding head is embedded in the sealing embedded groove.

Preferably, the rubber seal ring front end outside circular edges and corners and the pneumatic hole front end outside circular edges and corners all adopt the cambered surface to handle, the degree of depth in pneumatic hole is three times of rubber seal ring thickness, rubber seal ring is pushed the complete laminating of the circular outer wall in pneumatic hole's inside back rubber seal ring and the circular inner wall in pneumatic hole.

Compared with the prior art, the utility model provides an injection molding and demolding mechanism for automobile exterior trimming parts, which has the following beneficial effects:

1. according to the utility model, the novel demolding auxiliary device is additionally arranged outside the rear half section of the demolding guide rod of the injection demolding mechanism for the automobile exterior trimming parts, and can play an auxiliary role when the demolding device demolds the injection-molded finished automobile exterior trimming parts, so that the demolding device can more quickly and accurately demold the injection-molded automobile exterior trimming parts, and can also avoid the situation that the automobile exterior trimming parts are easy to adhere during demolding, because the demolding device can synchronously drive the demolding auxiliary device to work together when in use, and the demolding auxiliary device can blow the automobile exterior trimming parts to generate an air blowing effect during auxiliary demolding, thereby quickly blowing off the automobile exterior trimming parts, and thus the demolding efficiency of the automobile exterior trimming parts can be increased;

2. the demoulding auxiliary device has the following specific use principle that when the whole injection molding device is subjected to injection molding and ready for demoulding, two closed injection molds are separated, the automobile exterior trimming part formed after separation is jointed and sleeved outside a forming block, at the moment, an external pushing cylinder pushes a demoulding device to carry out demoulding operation on the automobile exterior trimming part outside the forming block, a pushing cylinder pushes a demoulding push plate forwards when working, the demoulding push plate pushes a demoulding head forwards through a demoulding guide rod, so that the demoulding head moves forwards from a sealing embedded groove, and the demoulding head pushes a finished automobile exterior trimming part sleeved outside the forming block forwards when moving forwards, so that the demoulding operation on the automobile exterior trimming part is finished, and in the process that the demoulding push plate pushes the demoulding head forwards through the demoulding guide rod, the demoulding push plate synchronously pushes a fixing ring and a rubber sealing ring outside the fixing ring forwards through a connecting type pushing spring, the rubber sealing ring is inserted into the pneumatic hole when being pushed forwards, and because the depth of the pneumatic hole is three times of the thickness of the rubber sealing ring, therefore, the rubber sealing ring can continue to go deep after being pushed and inserted into the pneumatic hole, and the air in the pneumatic hole can be exhausted by the rubber sealing ring in the process of going deep inwards in the pneumatic hole, so that the air which is slowly exhausted can be discharged into the sealing embedded groove along the demoulding guide hole, and the air which is discharged into the sealing embedded groove can be outwards sprayed out through the front end opening, the sprayed gas can impact and be sleeved in the finished automobile exterior trimming part outside the forming block, so that the automobile exterior trimming part can be quickly blown away, the demoulding head pushed forwards can also push the automobile exterior trimming part forwards, therefore, the demoulding operation of the automobile exterior trimming part can be rapidly completed under the combination of the two phases, so that the demoulding efficiency of the whole injection moulding and demoulding mechanism of the automobile exterior trimming part can be increased.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model without limiting the utility model in which:

FIG. 1 is a schematic side-view perspective structure view of an injection molding and demolding mechanism for an exterior trimming part of an automobile according to the present invention;

FIG. 2 is a schematic view of a plane structure of an injection molding and demolding mechanism for an exterior trimming part of an automobile in an unused state according to the present invention;

FIG. 3 is a schematic diagram of a mold-releasing state plane structure of an injection molding and mold-releasing mechanism for exterior trimming parts of an automobile according to the present invention;

FIG. 4 is a schematic view of a single plane structure of the demolding device according to the present invention;

FIG. 5 is a schematic plan view of the auxiliary device for demolding according to the present invention;

in the figure: 1. injection molding A; 2. injection mold B; 3. a tailgate; 4. a demoulding groove; 5. a demolding device; 6. an annular seal cartridge; 7. forming a block; 8. moving the guide post; 9. an injection molding port; 10. moving the guide hole; 11. an annular seal groove; 12. forming a groove; 13. a demolding assisting device; 14. demoulding guide holes; 15. a sealing inner embedded groove; 16. demoulding head; 17. demoulding guide rods; 18. demoulding push plate; 19. a sliding guide bar; 20. an external connection seat; 21. connecting the through hole externally; 22. a sliding guide hole; 23. a linked push spring; 24. a fixing ring; 25. a rubber seal ring; 26. and (4) a pneumatic hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, fig. 2, fig. 3, and fig. 4, the present invention provides a technical solution: an injection molding and demolding mechanism for automobile exterior trim parts comprises an injection mold A1 and an injection mold B2, wherein the injection mold A1 is installed on the front side of an injection mold B2, a molding block 7 is arranged at the center of the front end of the injection mold B2, a demolding groove 4 with a backward opening is formed in the rear end of an injection mold B2, an inward-concave molding groove 12 is formed in the center of the rear end of an injection mold A1, an annular sealing groove 11 is formed in the outer side of the molding groove 12, an annular sealing sleeve 6 is arranged on the circular outer side of the molding block 7, the annular sealing sleeve 6 is connected to the outer wall of the front end of the injection mold B2 through welding, the molding groove 12 and the molding block 7 are identical in cross-sectional shape, the depth and the cross-sectional area of the molding groove 12 are respectively larger than the thickness and the cross-sectional area of the molding block 7, a gap between the molding block 7 and the molding groove 12 is formed into a molding cavity after the molding block 7 is embedded into the molding groove 12, and the annular sealing sleeve 6 can be completely embedded into the annular sealing groove 11, when hot melt plastic is completely injected into a molding cavity, at the moment, the hot melt plastic in the molding cavity needs to be waited for cooling and molding, the finished automobile exterior trim is formed after the hot melt plastic in the molding cavity is cooled and molded, a demolding device 5 is arranged in a demolding groove 4, a rear baffle 3 is arranged at the rear end of an injection mold B2, moving guide holes 10 penetrate through the injection mold A1 close to four corners, an injection molding opening 9 is arranged on the outer wall of the center of the front end of an injection mold A1, moving guide posts 8 are arranged on the outer wall of the front end of an injection mold B2 close to four corners, the front ends of the four moving guide posts 8 correspondingly penetrate through the four moving guide holes 10 respectively, when the injection mold A1 is pushed forwards or pulled backwards by a power mechanism, because the four moving guide posts 8 on the injection mold A1 are correspondingly inserted into the four moving guide holes 10 in the injection mold B2, and the injection mold A1 can be kept in the same straight guide hole when the injection mold A1 is pushed forwards or pulled backwards by the power mechanism The injection mould A1 can be completely closed on the injection mould B2 by moving back and forth on the line, so that the joint of the injection mould A1 and the injection mould B2 can keep a sealing state when the mould is closed, thereby avoiding the condition of unloading during injection molding, the cross-sectional shapes and the areas of the injection mold A1 and the injection mold B2 are the same, the outer wall of the rear end of the injection mold A1 can be completely attached to the outer wall of the front end of the injection mold B2, the depth of the demoulding groove 4 is two thirds of the thickness of the injection mold B2, the deeper depth of the demoulding groove 4 can ensure that the movable range of the demoulding push plate 18 in the demoulding groove 4 is larger, it is possible to make the stroke of forward movement of the die-off head 16 larger, so that when the injection molded automobile exterior trim is larger, since the stroke of forward movement of the die-off head 16 is larger, the demolding operation can be completed for a larger automobile exterior trim, so that the demolding range of the demolding device 5 can be increased.

Example two

Referring to fig. 1, fig. 2, fig. 3, and fig. 4, the present invention provides a technical solution: an injection demoulding mechanism for automobile exterior trimming parts comprises a demoulding guide hole 14, a sealing embedded groove 15, a demoulding head 16, a demoulding guide rod 17, a demoulding push plate 18, a sliding guide rod 19, an external seat 20, an external through hole 21 and a sliding guide hole 22, wherein the sealing embedded groove 15 is arranged inside the center of the front end of a forming block 7, the demoulding guide hole 14 is arranged at the rear end of the sealing embedded groove 15, the demoulding head 16 is embedded inside the sealing embedded groove 15, the demoulding head 16 can be completely embedded inside the sealing embedded groove 15 in a sealing manner, the outer wall of the front end of the demoulding head 16 is flush with the outer wall of the front end of the forming block 7 after the demoulding head 16 is embedded inside the sealing embedded groove 15, because the forming block 7 is sealed in the forming groove 12 during injection moulding, the space formed between the forming block 7 and the forming groove 12 is a forming cavity, and hot melt plastics is injected into the forming cavity and is cooled and formed, the finished automobile exterior trimming part can be formed after the hot melt plastic in the cavity is cooled and formed, if the drop height between the demoulding head 16 and the outer wall of the front end of the forming block 7 causes the formed automobile exterior trimming part to be defective, thus the injection forming effect of the whole injection mould can be influenced, a demoulding guide rod 17 penetrates through the inside of the demoulding guide hole 14, the front end of the demoulding guide rod 17 is fixedly connected with the demoulding head 16, the insides of the four corners of the demoulding groove 4, which are close to the four corners, are all provided with a sliding guide rod 19, two ends of the four sliding guide rods 19 are respectively fixedly connected with the inner wall of the demoulding groove 4 and the rear baffle 3, the inside of the demoulding groove 4 is provided with a demoulding push plate 18, the insides of the demoulding push plate 18, which are close to the four corners are all penetrated with a sliding guide hole 22, the four sliding guide holes 22 are respectively and correspondingly sleeved on the outsides of the four sliding guide rods 19, the rear end of the demoulding guide rod 17 is fixedly connected with the demoulding push plate 18, and the center of the rear end of the demoulding push plate 18 is provided with an external connecting seat 20, an external through hole 21 penetrates through the center of the rear baffle 3, a demoulding auxiliary device 13 is arranged outside the rear half section of the demoulding guide rod 17, the circular outer wall of the sliding guide rod 19 and the circular inner wall of the sliding guide hole 22 are both polished, the circular inner wall of the sliding guide hole 22 is attached to the circular outer wall of the sliding guide rod 19, the demoulding push plate 18 can slide back and forth outside the sliding guide rod 19 through the sliding guide hole 22, during demoulding, the pushing cylinder can push the sliding guide rod 19 forwards, the sliding guide rod 19 can push the demoulding head 16 forwards, so that the demoulding head 16 moves forwards from the sealing embedded groove 15, when the demoulding head 16 moves forwards, the finished automobile exterior trim sleeved outside the forming block 7 can be pushed forwards, so that the demoulding operation of the automobile exterior trim is completed, and if a large gap is formed between the outer wall of the sliding guide rod 19 and the inner wall of the sliding guide hole 22, the pushed demoulding push plate 18 easily moves to fall, therefore, the demoulding guide rod 17 can be easily damaged, so that the demoulding device 5 can not work normally, and the circular inner wall of the sliding guide hole 22 is attached to the circular outer wall of the sliding guide rod 19, so that the demoulding push plate 18 can be ensured to move back and forth on a stable and accurate straight line, and the demoulding stability and accuracy of the demoulding device 5 can be improved.

EXAMPLE III

Referring to fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the present invention provides a technical solution: an injection molding and demolding mechanism for automobile exterior trimming parts comprises a connecting type pushing spring 23, a fixing ring 24, a rubber sealing ring 25 and a pneumatic hole 26, wherein the opening of the pneumatic hole 26 is embedded in the inner wall of the front end of a demolding groove 4 backwards, the pneumatic hole 26 is communicated with the inside of a demolding guide hole 14, the fixing ring 24 is sleeved outside a demolding guide rod 17 close to the rear side in a circular manner, the rubber sealing ring 25 is sleeved outside the fixing ring 24 in a circular manner, the connecting type pushing spring 23 is arranged between the fixing ring 24 and a demolding push plate 18, the connecting type pushing spring 23 is sleeved outside the demolding guide rod 17, the outermost side circular edge of the front end of the rubber sealing ring 25 and the outermost side circular edge of the front end of the pneumatic hole 26 are processed by cambered surfaces, the depth of the pneumatic hole 26 is three times of the thickness of the rubber sealing ring 25, the circular outer wall of the rubber sealing ring 25 is completely attached to the circular inner wall of the pneumatic hole 26 after the rubber sealing ring 25 is pushed to the inside of the pneumatic hole 26, during the process that the demoulding push plate 18 pushes the demoulding head 16 forwards through the demoulding guide rod 17, the demoulding push plate 18 synchronously pushes the fixing ring 24 and the rubber sealing ring 25 outside the fixing ring forwards through the connecting type pushing spring 23, the rubber sealing ring 25 is pushed forwards and then is inserted into the pneumatic hole 26, because the depth of the pneumatic hole 26 is three times of the thickness of the rubber sealing ring 25, the rubber sealing ring 25 is pushed and inserted into the pneumatic hole 26 and then goes deep, the rubber sealing ring 25 removes the air in the pneumatic hole 26 in the process of going deep inwards in the pneumatic hole 26, so the air which is slowly removed is discharged to the sealing embedded groove 15 along the demoulding guide hole 14, the air which is discharged to the sealing embedded groove 15 is sprayed outwards through the front end opening of the rubber sealing ring, and the sprayed air impacts the finished automobile exterior trim sleeved outside the moulding block 7, therefore, the automobile exterior trimming part can be quickly blown away, and the demolding head 16 pushed forwards can also push the automobile exterior trimming part forwards, so that the demolding operation of the automobile exterior trimming part can be quickly completed under the combination of the two phases.

The working principle and the using process of the utility model are as follows: after the injection molding and demolding mechanism for the automobile exterior trimming part is installed, firstly, an injection mold A1 and an injection mold B2 are respectively butted on corresponding installation positions on an injection mold, then, the injection molding machine is butted with an injection port 9 on an injection mold A1, then, the injection mold can be normally used for injection molding the automobile exterior trimming part, when the injection mold works, a power mechanism can push the injection mold A1 to enable the injection mold A1 and the injection mold B2 to be completely closed together, then, the injection molding machine can inject hot melt plastic into a sealed molding cavity formed between a molding block 7 and a molding groove 12, after the hot melt plastic is completely injected into the molding cavity, the hot melt plastic in the molding cavity needs to be waited for cooling molding, after the hot melt plastic in the molding cavity is cooled, the finished automobile exterior trimming part is formed, and after the automobile exterior trimming part is cooled and molded, at the moment, the power mechanism can pull the injection mold A1 reversely to separate the injection mold A1 from the injection mold B2, so that the exterior of the molding block 7 can be completely exposed to cool the molded exterior trim of the automobile, then the demolding device 5 on the injection mold A1 can perform demolding operation on the exterior trim of the automobile, when the demolding device 5 works, the pushing cylinder can push the demolding push plate 18 forwards, the demolding push plate 18 can push the demolding head 16 forwards through the demolding guide rod 17, so that the demolding head 16 moves forwards from the sealing embedded groove 15, and when the demolding head 16 moves forwards, the finished exterior trim of the automobile sleeved on the exterior of the molding block 7 can be pushed forwards, so that the demolding operation on the exterior trim of the automobile is completed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automobile exterior trim piece demoulding mechanism that moulds plastics, includes injection mould A (1) and injection mould B (2), its characterized in that: the injection mould A (1) is arranged on the front side of an injection mould B (2), a forming block (7) is arranged at the center of the front end of the injection mould B (2), a demoulding groove (4) with a backward opening is formed in the rear end of the injection mould B (2), a demoulding device (5) is arranged in the demoulding groove (4), a rear baffle plate (3) is arranged at the rear end of the injection mould B (2), the demoulding device (5) comprises a demoulding guide hole (14), a sealing inner embedded groove (15), a demoulding head (16), a demoulding guide rod (17), a demoulding push plate (18), a sliding guide rod (19), an outer base (20), an outer through hole (21) and a sliding guide hole (22), the sealing inner embedded groove (15) is arranged in the center of the front end of the forming block (7), the rear end of the sealing inner embedded groove (15) is provided with the demoulding guide hole (14), and the demoulding head (16) is embedded in the sealing inner embedded groove (15), the demolding device is characterized in that demolding guide rods (17) penetrate through the demolding guide holes (14), the front ends of the demolding guide rods (17) are fixedly connected with a demolding head (16), the demolding groove (4) is provided with sliding guide rods (19) close to the inner parts of four corners, the two ends of the four sliding guide rods (19) are respectively and fixedly connected with the inner wall of the demolding groove (4) and the rear baffle (3), a demolding push plate (18) is arranged inside the demolding groove (4), the sliding guide holes (22) penetrate through the inner parts of the demolding push plate (18) close to the four corners, the four sliding guide holes (22) are respectively and correspondingly sleeved outside the four sliding guide rods (19), the rear end of the demolding guide rod (17) is fixedly connected with the demolding push plate (18), an outer connecting seat (20) is arranged at the center of the rear end of the demolding push plate (18), and an outer connecting hole (21) penetrates through the center of the rear baffle (3), demolding auxiliary device (13) is provided with to demolding guide arm (17) latter half outside, demolding auxiliary device (13) promote spring (23), solid fixed ring (24), rubber seal (25) and pneumatic hole (26) including the connection mode, pneumatic hole (26) opening embedding backward inside demolding groove (4) front end inner wall, pneumatic hole (26) and drawing of patterns guide hole (14) inside intercommunication, drawing of patterns guide arm (17) are close to rear side circular outside and have cup jointed solid fixed ring (24), rubber seal (25) have been cup jointed to the circular outside of solid fixed ring (24), be provided with connection mode between solid fixed ring (24) and drawing of patterns push pedal (18) and promote spring (23), connection mode promotes spring (23) and cup joints the circular outside at drawing of patterns guide arm (17).

2. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 1, wherein: the injection mould A (1) is close to the inside removal guide hole (10) that all runs through of four corners department, be provided with on the outer wall of injection mould A (1) front end center department and mould plastics mouthful (9), injection mould B (2) is close to all to be provided with on the outer wall of four corners department front end and removes guide pillar (8), four the front end of removing guide pillar (8) corresponds the inside of running through at four removal guide holes (10) respectively.

3. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 1, wherein: the injection mould A (1) rear end center department inside is provided with inside sunken shaping groove (12), the outside in shaping groove (12) is provided with annular seal groove (11), the circular outside of shaping piece (7) is provided with ring packing cover (6), ring packing cover (6) pass through welded connection on the front end outer wall of injection mould B (2).

4. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 3, wherein: the cross sectional shape of shaping groove (12) and shaping piece (7) is the same, the thickness and the cross sectional area that do not are greater than shaping piece (7) are equallyd divide to the degree of depth and the cross sectional area of shaping groove (12), the shaping piece (7) are embedded to the inside back space between the two of shaping groove (12) and are formed into the shaping chamber, embedding that annular seal cover (6) can be complete is in the inside of annular seal groove (11).

5. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 1, wherein: the cross-sectional shape and the area size of the injection mould A (1) and the injection mould B (2) are the same, the outer wall of the rear end of the injection mould A (1) can be completely attached to the outer wall of the front end of the injection mould B (2), and the depth of the demolding groove (4) is two thirds of the thickness of the injection mould B (2).

6. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 1, wherein: the circular outer wall of the sliding guide rod (19) and the circular inner wall of the sliding guide hole (22) are both subjected to grinding and polishing treatment, the circular inner wall of the sliding guide hole (22) is attached to the circular outer wall of the sliding guide rod (19), and the demolding push plate (18) can slide back and forth outside the sliding guide rod (19) through the sliding guide hole (22).

7. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 1, wherein: the demolding head (16) can be completely embedded in the sealing embedded groove (15) in a sealing mode, and the outer wall of the front end of the demolding head (16) is flush with the outer wall of the front end of the forming block (7) after the demolding head (16) is embedded in the sealing embedded groove (15).

8. The injection molding and demolding mechanism for the automobile exterior trimming part according to claim 1, wherein: the rubber seal ring (25) front end outside circular edges and corners and pneumatic hole (26) front end outside circular edges and corners all adopt the cambered surface to handle, the degree of depth of pneumatic hole (26) is three times of rubber seal ring (25) thickness, rubber seal ring (25) are pushed the complete laminating of the circular outer wall of inside back rubber seal ring (25) in pneumatic hole (26) and the circular inner wall in pneumatic hole (26).