CN116175893B - Car trunk rear cover forming mold - Google Patents

Abstract

The application discloses a rear cover forming die of an automobile trunk, which comprises a fixed die, a movable die, side loose cores, a first demolding assembly, a second demolding assembly and a third demolding assembly, wherein the first demolding assembly comprises a first loose core, a first core block and a first driving piece, the first loose core is slidably arranged in a first mounting groove on the movable die, one end, close to a rear cover, of the first loose core is provided with a containing groove, the first driving piece is arranged on the movable die, the first core block is slidably arranged on the movable die, the sliding direction of the first core block on the movable die is perpendicular to the sliding direction of the first loose core, the first core block is slidably arranged in the containing groove, the sliding direction of the first core block in the containing groove forms a V-shaped included angle with the sliding direction of the first loose core, and during demolding, the first driving piece drives the first loose core to move relative to the movable die in a direction away from the rear cover, so that the first core block moves relative to the movable die in a direction away from a back-off direction, and the back-off is further demolded. The automobile trunk rear cover forming die is ingenious in layout and simple in demoulding.

Description

Forming die for rear cover of automobile trunk

Technical Field

The application relates to the technical field of molds, in particular to a rear cover forming mold of an automobile trunk.

Background

At present, along with the continuous aggravation of automobile market competition, various automobile manufacturers pay more and more attention to the research and development of the whole automobile performance and the structural strength. For example, as shown in fig. 1 and 2, a perspective view of a conventional rear cover 100 of a car trunk is shown, wherein a reverse buckle 102 is generally arranged between the back surface of the rear cover 100 of the car trunk and a flange 101 for improving strength, a buckle seat 103 is generally required to be arranged on the back surface of the rear cover 100 of the car trunk for facilitating buckling, and a groove 104 is arranged on the front surface of the rear cover 100 of the car trunk for facilitating opening of a trunk cover plate.

However, the rear cover 100 of the automobile trunk has the following defects that (1) due to the structural limitation of the back-off 102 and the included angle between the flange 101 and the rear cover 100, if a traditional demoulding structure is adopted, the back-off 102 cannot be directly demoulded, (2) due to the fact that the number of the clamping seats 103 on the rear cover is generally large, if the traditional demoulding structure is adopted, complicated demoulding operation is required, the demoulding efficiency is low, and the structure of a mould is easy to be compact enough, and (3) in order to improve the front forming quality of the rear cover 100, the pouring gate of the mould is usually arranged on one side close to the back of the rear cover 100, therefore, when the front of the automobile rear cover 100 is close to one side of the fixed mould, due to the structural limitation of the groove 104, if the traditional demoulding structure is adopted, more module structures are required to be arranged on the fixed mould, so that the structural complexity on the fixed mould is increased, and too many modules are easy to form product defects (such as overflow edges, dents, connecting marks and the like) on the front of the rear cover 100, and the forming quality is low.

Disclosure of Invention

The application aims to provide a rear cover forming die of an automobile trunk, which is ingenious in layout, capable of achieving demolding of a back buckle and simple in demolding.

The technical scheme includes that the automobile trunk rear cover forming die comprises a fixed die, a movable die, a side loose core for forming a retaining edge, a first demolding assembly for forming a back-off, a second demolding assembly for forming a groove and a third demolding assembly for forming a buckle seat, wherein the first demolding assembly comprises a first loose core, a first core block and a first driving piece, the first loose core is slidably arranged in a first mounting groove on the movable die, one end, close to a rear cover, of the first loose core is provided with a containing groove, the first driving piece is arranged in the movable die, the first driving piece is used for driving the first loose core to slide in the first mounting groove, the first core block is slidably arranged in the movable die, the sliding direction of the first core block on the movable die is perpendicular to the sliding direction of the first loose core, the first core block is slidably arranged in the containing groove, the first loose core block is slidably arranged in the containing groove, one end, close to the rear cover is arranged at an inclined angle to the sliding direction of the first loose core, and the first driving piece is far away from the back-off direction when the first loose core is driven.

The side core pulling device comprises a movable die, a side core pulling device, a guide block, a reset piece and a trunk rear cover forming die, wherein the side core pulling device is arranged on the movable die, one side, away from a flange, of the side core pulling device is of an inclined surface structure, a guide block is arranged on one side, close to the first core pulling device, of the side core pulling device, a position, corresponding to the guide block, of the movable die is provided with a stepping groove, a guide groove is arranged on the position, corresponding to the guide block, of the first core pulling device, the guide block is connected to the guide groove in a sliding mode, during demolding, the rear cover moves along with the movable die in a direction away from a fixed die, the first core pulling device moves relative to the movable die in a direction away from the rear cover, so that the side core pulling device is forced to move away from the flange through the guide groove and the guide block, and then the flange is demolded, and the trunk rear cover forming die further comprises the reset piece, which is arranged on the movable die, and the reset piece is used for forcing the side core pulling device to realize die assembly.

The reset piece comprises a reset cylinder body, a driving arm and a connecting arm, wherein the reset cylinder body is fixed to the movable die along the sliding direction of the side core pulling, the driving arm is of an I-shaped structure and is arranged at the telescopic end of the reset cylinder body, the connecting arm is fixed to the side core pulling, a U-shaped groove for sliding connection with the middle part of the driving arm is formed in the connecting arm, and when the die is closed, the distance L between one end of the driving arm, which is far away from the reset cylinder body, and the connecting arm is equal to the demolding stroke of the side core pulling.

The second demolding assembly comprises a second template, a second core pulling device, a first guide rod, a second guide rod and a mounting seat, wherein the second template can be connected to the fixed die in a sliding mode in a direction parallel to the moving direction of the movable die, the first guide rod is obliquely fixed to the mounting seat, the mounting seat can be connected to the second template in a sliding mode in a direction perpendicular to the moving direction of the second template, the mounting seat can be connected to the first guide rod in an axial direction of the first guide rod in a sliding mode, the second guide rod is connected to a first through hole in an oblique mode on the fixed die in an axial direction in a sliding mode, the second guide rod and the first guide rod form an X-shaped structure, one end of the second guide rod is fixed to the second core pulling device, the other end of the second guide rod is connected to the mounting seat in a radial sliding mode, during demolding, the second template is driven to move along with the movable die in the same direction, the first guide rod is forced to be connected to the first guide rod in a sliding mode in the moving direction perpendicular to the second template, the second guide rod is forced to be axially connected to the first guide rod in a sliding mode, the second guide rod is forced to be ejected out of the cover from the fixed die through the second guide rod, and the second guide rod is gradually separated from the fixed cover through the second guide seat, and the cover is ejected from the fixed cover after the cover is gradually separated from the fixed cover.

Preferably, the second demolding assembly further comprises a pull rod, one end of the pull rod is hinged to the second template, a hook is arranged at the other end of the pull rod, a stop block is arranged on the side face of the movable mold, the hook is connected to the stop block in a hanging mode during demolding, and the movable mold can pull the second template to move in the same direction.

Preferably, the second demolding assembly further comprises a limiting frame and an elastic piece, wherein the limiting frame is arranged on the side face of the fixed mold, the elastic piece is arranged on the limiting frame, and the elastic piece is used for forcing the pull rod to rotate in the direction close to the stop block.

Preferably, the second demolding assembly further comprises an ejection part, the ejection part is arranged on the fixed mold, a first inclined guide surface is arranged on one side, facing the fixed mold, of the pull rod, a second inclined guide surface is arranged on the hook, an inclined guide block is arranged on the side face of the fixed mold, during demolding, the movable mold pulls the second template to move synchronously until the second core pulling piece is completely separated from the groove, the inclined guide block forces the pull rod to rotate in a direction away from the stop block through the first inclined guide surface, until the hook is separated from the stop block, the ejection part forces the second template to move reversely, so that the first inclined guide surface is separated from the inclined guide block, and during mold clamping, the stop block forces the second template to move synchronously with the movable mold through the second inclined guide surface until the second template moves until the fixed mold plate contacts, the stop block forces the pull rod to rotate in a direction away from the stop block through the second inclined guide surface until the pull rod contacts the stop block again until the stop block contacts the stop block.

The third demolding assembly comprises a third template, a third core pulling piece, a third guide rod, a fourth guide rod, a sliding seat and a sliding block, wherein the third template can be connected to the movable die in a sliding mode along a moving direction parallel to the movable die, the sliding seat is fixed to the third template, the sliding block can be connected to the sliding seat in a sliding mode along a moving direction perpendicular to the third template, the third guide rod is obliquely fixed to the movable die and is connected to the sliding block in an axial sliding mode, the fourth guide rod is connected to a second through hole in the movable die in an axial sliding mode and is parallel to the third guide rod, one end of the fourth guide rod is fixed to the third core pulling piece, the other end of the fourth guide rod is fixed to the sliding block, the third demolding assembly further comprises a third driving piece, the third driving piece is arranged on the movable die and is used for driving the third template to move, and when the third guide rod is obliquely fixed to the movable die, the third guide rod is pushed out of the movable die from the movable die through the third through the second through hole in a sliding mode, and the fourth guide rod is parallel to the third guide rod, one end of the fourth guide rod is fixed to the third guide rod, and the third guide rod is fixed to the third die, and the third driving piece is gradually ejected to the movable die from the movable die to the movable die through the third die.

Preferably, the rear cover forming die of the automobile trunk further comprises a mark printing assembly for forming marks on the front surface of the rear cover, wherein the mark printing assembly comprises a mark printing loose core, a fixing seat, a fixing block and a second driving piece; the fixing seat is arranged on the side face of the fixed die, the fixing block is connected to the fixing seat in a sliding mode along the direction parallel to the side face of the fixed die, an inclined guide groove is formed in the fixing block, the mark printing loose core can be connected to a second installation groove on the fixed die in a sliding mode, one end, away from the rear cover, of the mark printing loose core is connected to the inclined guide groove in a sliding mode, the second driving piece is arranged on the side face of the fixed die and used for driving the fixing block to slide on the fixing seat, and when the fixing block is removed, the second driving piece drives the fixing block to slide, so that the mark printing loose core is forced to slide in the direction away from the rear cover through the fixing block.

Preferably, the first driving piece comprises a first template and a first cylinder body, the first loose cores on the first demolding assemblies are all fixed on the first template, the first cylinder body is arranged on the movable mold, and the first cylinder body is used for driving the first template to move along a sliding direction parallel to the first loose cores.

Compared with the prior art, the application has the beneficial effects that the first core block can slide on the movable die along the sliding direction perpendicular to the first core pulling, and the first core block can slide in the accommodating groove relative to the first core pulling, and a V-shaped included angle is formed between the sliding direction of the first core block in the accommodating groove and the sliding direction of the first core pulling; the first core block can only slide in the direction perpendicular to the moving direction of the first core pulling, so the movable die can restrict the first core block to move in the same direction along with the first core pulling, namely the movement amount of the first core block in the sliding direction parallel to the first core pulling is zero, thereby ensuring that the first core block can not move in the direction parallel to the sliding direction of the first core pulling, and the reverse buckle is not damaged, in addition, the movable die can cause oblique relative sliding between the first core block and the first core pulling in the accommodating groove (namely the sliding direction of the first core block is not coincident with the moving direction of the first core pulling) when restricting the first core block to move in the same direction along with the first core pulling, and the first core block is forced to slide in the direction perpendicular to the direction of the reverse buckle, so that the first core block is forced to slide in the opposite direction along with the first core pulling, namely the direction of the reverse buckle is forced to move in the direction along with the direction of the first core pulling, namely the reverse buckle is not damaged, and demolding the back-off. According to the above, the layout of the rear cover forming die of the automobile trunk is ingenious, the inverted buckle can be demolded, and the demolding is simple.

Drawings

Fig. 1 is a perspective view of a rear cover of an automobile trunk provided by the application.

Fig. 2 is another state diagram of the rear cover of the trunk of fig. 1 according to the present application.

Fig. 3 is a perspective view of a rear cover forming die of an automobile trunk.

Fig. 4 is a perspective view of a first stripper assembly provided by the present application.

Fig. 5 is an exploded view of a portion of the structure of fig. 4 provided by the present application.

Fig. 6 is an exploded view of a portion of the structure of fig. 4 provided by the present application.

Fig. 7 is a perspective view of a second stripper assembly provided by the present application.

Fig. 8 is an exploded view of the second stripper assembly of fig. 7 provided by the present application.

Fig. 9 is a perspective view of a third stripper assembly provided by the present application.

Fig. 10 is an exploded view of the third stripper assembly of fig. 9 provided in accordance with the present application.

Fig. 11 is a perspective view of a marking assembly according to the present application.

Fig. 12 is a top view of the molding die for the rear cover of the trunk of the automobile in fig. 3 provided by the application.

Fig. 13 is a cross-sectional view taken along line A-A of fig. 12, in accordance with the present application.

Fig. 14 is an enlarged view of a portion of fig. 13 at I provided by the present application.

Fig. 15 is a cross-sectional view taken along line B-B of fig. 13 provided by the present application.

Fig. 16 is an enlarged view of part II of fig. 15 provided by the present application.

Fig. 17 is an enlarged view of a portion of fig. 15 at III, provided by the present application.

Fig. 18 is an enlarged view of a portion of the IV of fig. 15 provided by the present application.

Fig. 19 is an enlarged view of a portion of fig. 15 at V provided by the present application.

Fig. 20 is a cross-sectional view of the rear cover forming die of the automobile trunk of fig. 3 along the reset member provided by the application.

Fig. 21 is a cross-sectional view of the molding die for the rear cover of the automobile trunk of fig. 3 taken along the second stripping assembly provided by the application.

Fig. 22 is an enlarged view of a portion of fig. 21 taken along VI in accordance with the present application.

Fig. 23 is an enlarged view of a portion of fig. 21 taken along VII as provided by the present application.

FIG. 24 is a cross-sectional view of a side of a movable mold along a third stripper unit provided by the present application.

Fig. 25 is an enlarged view of a portion of fig. 24 taken along line VIII provided by the present application.

Fig. 26 is an enlarged view of a portion of fig. 24 taken along line IX in accordance with the present application.

In the figure, 1, a fixed mold; 11, a first through hole; 12, oblique guide blocks; 13, second mounting groove, 14, fixed die plate, 2, movable die, 21, first mounting groove, 22, yielding groove, 23, stop block, 24, second through hole, 25, limit groove, 3, side core, 31, inclined surface structure, 32, guide block, 4, first demoulding component, 41, first core, 411, containing groove, 412, guide groove, 413, guide rail, 42, first core block, 421, stop block, 422, track groove, 43, first driving member, 431, first template, 432, first cylinder, 5, second demoulding component, 51, second core, 52, second template, 53, first guide rod, 54, second guide rod, 55, mounting seat, 56, pull rod, 561, hook, 562, first inclined guide surface, 563, second inclined guide surface, 57, limit bracket, 58, elastic member, 6, third demoulding component, 61, third core, 62, third template, 63, third guide rod, 64, fourth guide rod, 65, sliding seat, 66, sliding block, 67, sliding arm, 67, reset arm, 92, guide arm, 101, guide arm, 101, guide groove, 93, guide groove, 55, mounting seat, 56, pull rod, 561, hook, etc.

Detailed Description

The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation. The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 26, an embodiment of the present application provides a molding die for a rear cover of an automobile trunk, which includes a fixed die 1, a movable die 2, a side core pulling 3 for molding a flange 101, a first mold releasing assembly 4 for molding a back-off 102, a second mold releasing assembly 5 for molding a groove 104, and a third mold releasing assembly 6 for molding a snap seat 103.

Referring to fig. 4 to 6 and 12 to 16, in the present embodiment, the first demolding assembly 4 includes a first core-pulling 41, a first core block 42 and a first driving member 43, the first core-pulling 41 is slidably disposed in a first mounting groove 21 on the movable mold 2, a receiving groove 411 is disposed at one end of the first core-pulling 41 near the back cover 100, the first driving member 43 is disposed on the movable mold 2, the first driving member 43 is used for driving the first core-pulling 41 to slide in the first mounting groove 21, the first core block 42 is slidably disposed on the movable mold 2, and the sliding direction of the first core block 42 on the movable mold 2 is perpendicular to the sliding direction of the first core-pulling 41, the first core block 42 is slidably disposed in the receiving groove 411, and the sliding direction of the first core block 42 in the receiving groove 411 forms a V-shaped included angle with the sliding direction of the first core-pulling 41, and during demolding, the first driving member 43 drives the first core-pulling 41 to move relative to the movable mold 2 in a direction away from the back cover 100, so that the first core block 42 moves relative to the movable mold 2 in a direction away from the back-fastening 102, thereby performing the demolding 102.

The first demolding unit 4 operates on the principle that, as shown in fig. 14, when the mold is closed, the outer end surfaces (i.e., the left end surfaces in fig. 14) of the first core back 41 and the first core block 42 are used to mold a partial region of the back surface of the back cover 100, the partial region surrounds the outer periphery of the back mold 102, and the back mold 102 is molded between the first core back 41 and the first core block 42, and the side of the back mold 102 that is difficult to be demolded faces the first core block 42. During demolding, the first core-pulling 41 is driven by the first driving piece 43 to move relative to the movable die 2 in a direction away from the back cover 100, so that the first core-pulling 41 and the back-off 102 are separated, in the moving process, the first core block 42 can only slide in a direction perpendicular to the moving direction of the first core-pulling 41, so that the movable die 2 can limit the first core block 42 to move in the same direction along with the first core-pulling 41, namely, the moving amount of the first core block 42 in the sliding direction parallel to the first core-pulling 41 is zero, so that the first core block 42 cannot move in the direction parallel to the back-off 102, and therefore, the back-off 102 cannot be damaged, in addition, when the movable die 2 is limited to move in the same direction along with the first core-pulling 41, the first core block 42 is caused to slide obliquely relative to the accommodating groove 411 (namely, the sliding direction of the first core block 42 is not coincident with the moving direction of the first core-pulling 41), the first core block 42 is caused to slide adaptively on the movable die 2, so that the first core block 42 is caused to slide in the direction perpendicular to the back-off 102 (namely, the sliding direction F is opposite to the moving direction of the back-off 102) and the back-off 102 is caused to move in the direction perpendicular to the direction of the movable die 2 (namely, the back-off 102 is caused).

It should be understood that the same first core-pulling device 41 is not limited to only providing one receiving slot 411, i.e., not limited to slidably mounting one first core block 42, and when the distance between two (or more) adjacent back-off 102 is relatively short, the first core blocks 42 may be slidably mounted on the same first core-pulling device 41 at the same time, for example, one first core block 42 is slidably mounted on the first core-pulling device 41 in fig. 5, and two first core blocks 42 are slidably mounted on the first core-pulling device 41 in fig. 6.

In addition, the present application is not limited to the sliding installation manner of the first core block 42 on the movable mold 2 and the sliding installation manner of the first core block 42 in the accommodating slot 411, and for example, as shown in fig. 5, the first core block 42 is provided with the stopper 421, the movable mold 2 is provided with the stopper slot 25, and the stopper 421 is slidably connected to the stopper slot 25, so that the sliding installation between the first core block 42 and the movable mold 2 can be realized. Similarly, the inner wall of the accommodating slot 411 is provided with a guide rail 413, the first core block 42 is provided with a track groove 422, and the track groove 422 is slidably connected to the guide rail 413, so that the sliding installation between the first core block 42 and the accommodating slot 411 can be realized.

Referring to fig. 4, 13 and 14, in this embodiment, in order to avoid the need of providing each first core back 41 with a first driving member 43, the first driving member 43 includes a first mold plate 431 and a first cylinder 432, each first core back 41 on each first demolding assembly 4 is fixed to the first mold plate 431, the first cylinder 432 is disposed on the movable mold 2, and the first cylinder 432 is used for driving the first mold plate 431 to move along a sliding direction parallel to the first core back 41. In this way, the number of first cylinders 432 can be reduced, costs are lower, and the structure is facilitated to be more compact. In order to improve the movement precision of the first template 431, the first template 431 and the movable mold 2 can also realize limit sliding through the sliding fit of the guide post and the guide post hole.

Referring to fig. 4 to 6 and 15 to 16, in the present embodiment, the side core-pulling piece 3 is slidably disposed on the movable mold 2, one side of the side core-pulling piece 3 away from the flange 101 is a slant structure 31, one side of the side core-pulling piece 3 near the first core-pulling piece 41 is provided with a guide block 32, a position of the movable mold 2 corresponding to the guide block 32 is provided with a yielding groove 22, a position of the first core-pulling piece 41 corresponding to the guide block 32 is provided with a guide groove 412, the guide block 32 is slidably connected to the guide groove 412, during demolding, the rear cover 100 moves along with the movable mold 2 in a direction away from the fixed mold 1, and the first core-pulling piece 41 moves relative to the movable mold 2 in a direction away from the rear cover 100, so that the side core-pulling piece 3 is forced to move away from the flange 101 through the guide groove 412 and the guide block 32, and the mold for demolding the flange 101 is further provided with a reset member 8, and the reset member 8 is provided for forcing the side core-pulling piece 3 to be clamped.

The working principle of the side core pulling 3 is that as shown in fig. 16, the required demolding force between the movable mold 2 and the back surface of the back cover 100 is far greater than the required demolding force between the fixed mold 1 and the front surface of the back cover 100, and the back cover 100 moves along with the movable mold 2 in the same direction when the movable mold 2 is opened due to the limitation of structures such as the clamping seat 103, the flange 101 and the like, so that during demolding, the movable mold 2 is controlled to move along with the movable mold 2 in a direction away from the fixed mold 1, the first core pulling 41 is driven by the first driving piece 43 to move along with respect to the movable mold 2 in a direction away from the back cover 100, so that the back cover 102 is gradually demolded, and meanwhile, the guide block 32 is forced to slide relatively by the first core pulling 41 through the guide groove 412 when the first core pulling 41 moves, so that the side core pulling 3 slides along with the flange 101 automatically in a direction away from the flange 101, so that demolding of the flange 101 can be realized. Because the side of the side core pulling 3, which is far away from the flange 101, is provided with the inclined surface structure 31, when the side core pulling 3 moves along with the movable die 2 in the direction far away from the fixed die 1, the distance between the inclined surface structure 31 and the fixed die 1 can be gradually increased, so that the normal demoulding of the side core pulling 3 can provide a foundation. In addition, the side core-pulling device 3 is driven to release by adopting the matching mode of the guide groove 412 and the guide block 32, firstly, the side core-pulling device 3 can release the back-off 102 and the flange 101 simultaneously while the movable die 2 can be opened by adopting the releasing mode, and the releasing efficiency is higher, and secondly, compared with the mode of directly driving through a cylinder body, the moving speed and the moving quantity of the side core-pulling device 3 are easier to accurately control by adopting the matching mode of the guide groove 412 and the guide block 32, so that the side core-pulling device 3 is prevented from impacting the fixed die 1. The purpose of the reset member 8 is to automatically and completely clamp the side core back 3 during clamping.

Referring to fig. 3 and 20, in the present embodiment, the reset member 8 includes a reset cylinder 81, a driving arm 82 and a connecting arm 83, the reset cylinder 81 is fixed to the movable mold 2 along the sliding direction of the side core-pulling member 3, the driving arm 82 has an i-shaped structure, the driving arm 82 is disposed at the telescopic end of the reset cylinder 81, the connecting arm 83 is fixed to the side core-pulling member 3, the connecting arm 83 is provided with a U-shaped groove 831 for slidably connecting the middle part of the driving arm 82, and when the mold is closed, the distance L between the end of the driving arm 82 away from the reset cylinder 81 and the connecting arm 83 is equal to the demolding stroke of the side core-pulling member 3. As shown in fig. 20, since the distance L between the end of the movable arm far from the reset cylinder 81 and the connecting arm 83 during mold closing is equal to the distance L between the mold release stroke of the side core-pulling 3 during mold closing, the side core-pulling 3 is forced to be normally released by the mutual cooperation between the guide groove 412 on the first core-pulling 41 and the guide block 32 on the side core-pulling 3 until the side core-pulling 3 completely runs through the mold release stroke, the connecting arm 83 just contacts with the driving arm 82, so that the connecting arm 83 (i.e. the side core-pulling 3) can be limited, and during mold closing, only the distance L is required to be moved in the reverse direction of the driving arm 82 (i.e. the connecting arm 83 and the side core-pulling 3) by the reset cylinder 81 during mold closing, so that the mold closing of the side core-pulling 3 can be completed. In addition, the drive arm 82 does not interfere with the normal opening of the side core back 3 due to the presence of the space L. The reason why the reset cylinder 81 is not directly adopted to open the side core-pulling mechanism 3 is that the distance between the inclined surface structure 31 on the side core-pulling mechanism 3 and the fixed mold 1 is very slowly increased in the process of opening the movable mold 2, and if the side core-pulling mechanism 3 is directly opened through the reset cylinder 81, the collision between the inclined surface structure 31 on the side core-pulling mechanism 3 and the fixed mold 1 is easy to generate and uncontrollable. The return member 8 is not limited to this structure but may be a nitrogen spring or the like.

Referring to fig. 7, 8, 21 and 22, in the present embodiment, the second stripper unit 5 includes a second platen 52, a second core-pulling member 51, a first guide rod 53, a second guide rod 54 and a mounting base 55, wherein the second platen 52 is slidably connected to the fixed mold 1 in a direction parallel to the moving direction of the movable mold 2, the first guide rod 53 is obliquely fixed to the fixed mold 1, the mounting base 55 is slidably connected to the second platen 52 in a direction perpendicular to the moving direction of the second platen 52, the mounting base 55 is slidably connected to the first guide rod 53 in an axial direction of the first guide rod 53, the second guide rod 54 is axially slidably connected to the first through-hole 11 of the inclined arrangement on the fixed mold 1, and the second guide rod 54 and the first guide rod 53 form an X-shaped structure with each other, one end of the second guide rod 54 is fixed to the second core-pulling member 51, the other end of the second guide rod 54 is radially slidably connected to the mounting base 55, and during the demolding, the second platen 52 is driven to move in the same direction along with the movable mold 2, the first guide rod 53 forces the mounting base 55 to slide on the second platen 52 in a direction perpendicular to the moving direction of the second platen 52, and the second guide rod 53 is slidably connected to the first guide rod 53 in an axial direction of the second platen 52, the second guide rod 54 is axially slidably connected to the first guide rod 54, and the second guide rod 54 is axially slidably connected to the second guide rod 54 and the second guide rod 54 is gradually separated from the second guide rod 51 and the second guide rod cover 100 after the second guide rod 54 is ejected from the second guide rod 51 and the second guide rod 51 is ejected by the second guide rod 100.

The working principle of the second demolding assembly 5 is that, as shown in fig. 21 and 22, when demolding is performed, the second mold plate 52 is controlled to move along with the second mold plate 2 in the same direction, the second mold plate 52 drives the mounting seat 55 to move together, namely, the mounting seat 55 slides along the axial direction of the guide rod, the sliding of the mounting seat 55 can be decomposed into the horizontal movement and the vertical movement, the mounting seat 55 generates the adaptive relative sliding on the second mold plate 52, the horizontal movement generates the thrust to the second guide rod 54, the thrust can be decomposed into the thrust along the axial direction of the second guide rod 54 and the thrust along the radial direction of the second guide rod 54, and the thrust along the axial direction of the second guide rod 54 acts on the rear cover 100 through the second core pulling 51, so that the rear cover 100 is separated from the fixed mold 1, and the ejection function is achieved (so that the ejection mechanism can be omitted on the fixed mold 1). Because the other end of the second guide rod 54 is radially slidably connected to the mounting seat 55, during the process of ejecting the rear cover 100, the thrust along the radial direction of the second guide rod 54 will force the second core-pulling device 51 to gradually translate away from the groove 104, so that the second core-pulling device 51 gradually separates from the groove 104 during the process of ejecting the rear cover 100 until the demolding of the groove 104 is completed, and the separation between the rear cover 100 and the fixed mold 1 is also completed.

Referring to fig. 15 and 19, in the present embodiment, the second demolding assembly 5 further includes a pull rod 56, one end of the pull rod 56 is hinged to the second mold plate 52, a hook 561 is disposed at the other end of the pull rod 56, a stop block 23 is disposed on a side surface of the movable mold 2, and during demolding, the hook 561 is hooked on the stop block 23, so that the movable mold 2 can pull the second mold plate 52 to move in the same direction. Therefore, during demolding, linkage between the movable mold 2 and the second mold plate 52 is realized, and separation between the second core pulling 51 and the groove 104 and between the front surface of the rear cover 100 and the fixed mold 1 can be realized more accurately and reliably.

Referring to fig. 15 and 18, in the present embodiment, the second demolding assembly 5 further includes a limiting frame 57 and an elastic member 58, the limiting frame 57 is disposed on a side surface of the fixed mold 1, the elastic member 58 is disposed on the limiting frame 57, and the elastic member 58 is used for forcing the pull rod 56 to rotate in a direction approaching the stop block 23. The elastic member 58 can apply a force to the pull rod 56, so that the hook 561 can be prevented from being separated from the stopper 23 accidentally, and the stability is improved.

Referring to fig. 15 and 17 to 19, in the present embodiment, the second demolding assembly 5 further includes an ejection member disposed on the fixed mold 1. The first inclined guide surface 562 is arranged on one side of the pull rod 56 facing the fixed die 1, the second inclined guide surface 563 is arranged on the hook 561, the inclined guide block 12 is arranged on the side surface of the fixed die 1, during demoulding, the movable die 2 pulls the second die plate 52 to synchronously move until the second core pulling piece 51 is completely separated from the groove 104, the inclined guide block 12 forces the pull rod 56 to rotate in a direction away from the stop block 23 through the first inclined guide surface 562 until the hook 561 is separated from the stop block 23, the spring opening piece forces the second die plate 52 to reversely move, at the moment, the die plate can continue to move, during mould closing, the stop block 23 forces the second die plate 52 to synchronously move with the movable die 2 through the second inclined guide surface 563 until the second die plate 52 moves to the fixed die plate 14, the stop block 23 forces the pull rod 56 to rotate in a direction away from the stop block 23 through the second inclined guide surface 563 until the movable die 2 contacts the fixed die 1, and the elastic piece 58 forces the pull rod 56 to rotate in a direction close to the stop block 23 until the hook 561 is re-hung on the stop block 23. The pop-up member itself is a prior art, such as a nitrogen spring.

It will be appreciated that, as shown in fig. 15 and fig. 17 to 19, in the demolding process, after the hooks 561 are separated from the stop blocks 23, the spring opening member forces the second mold plate 52 to move reversely by a distance, so that the first inclined guide surface 562 is separated from the inclined guide block 12, and then the elastic member 58 forces the second mold plate 56 to rotate towards the direction close to the stop blocks 23, i.e. the tie rod 56 is tightly attached to the outer side surface of the fixed mold 1, when the mold is closed, the stop blocks 23 move left from the right side of the hooks 561, i.e. the stop blocks 23 can generate a force on the second inclined guide surface 563, the force can be decomposed into a force acting along the axial direction of the tie rod 56 and a force acting along the radial direction of the tie rod 56, and the force acting along the axial direction of the tie rod 56 is required to force the second mold plate 52 to slide should be smaller than the force required to force the tie rod 56, therefore, the force acting along the axial direction of the tie rod 56 can push the tie rod 56 first, so that the second mold plate 52 is reset until the second mold plate 52 is in contact with the fixed mold plate 14, i.e. the second mold plate 56 cannot be pushed by the tie rod 56, and then the force acts on the tie rod 56 from the right side of the tie rod 56, so that the hook blocks 23 can continue to move along the radial direction from the sides of the tie rod 56.

Referring to fig. 9, 10 and 24-26, in the present embodiment, the third demolding assembly 6 includes a third mold plate 62, a third core-pulling 61, a third guide rod 63, a fourth guide rod 64, a sliding seat 65 and a sliding block 66, wherein the third mold plate 62 is slidably connected to the movable mold 2 along a direction parallel to the moving direction of the movable mold 2, the sliding seat 65 is fixed to the third mold plate 62, the sliding block 66 is slidably connected to the sliding seat 65 along a direction perpendicular to the moving direction of the third mold plate 62, the third guide rod 63 is obliquely fixed to the movable mold 2 and the third guide rod 63 is axially slidably connected to the sliding block 66, the fourth guide rod 64 is axially slidably connected to the second through hole 24 on the movable mold 2, and the fourth guide rod 64 is parallel to the third guide rod 63, one end of the fourth guide rod 64 is fixed to the third core-pulling 61, the other end of the fourth guide rod 64 is fixed to the sliding block 66, the third demolding assembly 6 further includes a third driving member 67 (e.g. hydraulic or pneumatic cylinder), the third driving member 67 is disposed on the movable mold 2, and the third driving member 67 is used for driving the third mold plate 62, when the third mold plate 62 moves, the third guide rod 63 is forced to move, the third guide rod 63 is pushed out of the movable mold plate 2, and the third guide rod 64 is forced to move toward the movable mold plate 100 by the third mold plate 62, and the third guide rod 64 is pushed out of the movable mold 100, and the third guide plate 61 is gradually pushed out from the movable mold 100 by the second through hole 24. It should be noted that, as shown in fig. 22, the position of the corresponding groove 104 on the back of the rear cover 100 corresponds to one of the snap seats 103, so that the third demolding assembly 6 may be used for demolding.

The working principle of the third demolding assembly 6 is that, as shown in fig. 24, the third mold plate 62 moves synchronously with the movable mold 2, after the rear cover 100 is completely separated from one side of the fixed mold 1 and demolding is implemented by the first demolding assembly 4 and the side core pulling 3 on the back-off 102 and the flange 101 respectively, the third mold plate 62 is driven by the third driving piece 67 to move towards the direction close to the movable mold 2 (i.e. the rear cover 100), at this time, the sliding seat 65 on the third mold plate 62 forces the fourth guide rod 64 to slide axially in the second through hole 24 through the sliding block 66 (as shown in fig. 25 and 26), so that the third core pulling 61 generates thrust force through the fourth guide rod 64, the thrust force can be decomposed into thrust force perpendicular to the rear cover 100 and thrust force parallel to the rear cover 100, the thrust force perpendicular to the rear cover 100 pushes down the movable mold 2 to act as an ejection mechanism, and the thrust force parallel to the rear cover 100 gradually separates the third core pulling 61 from the buckle seat 103, thereby completing demolding of the buckle seat 103 while ejecting the rear cover 100. In addition, since the sliding block 66 is slidably connected to the sliding seat 65 along a direction perpendicular to the movement direction of the third template 62, the sliding block 66 can slide adaptively on the sliding seat 65 while the fourth guide rod 64 slides in the second through hole 24. The third guide rod 63 also plays a role in guiding and limiting the sliding of the sliding block 66 in the moving process, so that the sliding precision of the sliding block 66 is improved.

Referring to fig. 11 and 21-23, in the present embodiment, the molding mold for the rear cover 100 of the automobile trunk further includes a mark printing assembly 9 for forming a mark on the front surface of the rear cover 100, the mark printing assembly 9 includes a mark printing loose core 91, a fixing base 92, a fixing block 93 and a second driving member 94 (e.g. hydraulic or pneumatic cylinder), the fixing base 92 is disposed on the side surface of the fixed mold 1, the fixing block 93 is slidably connected to the fixing base 92 along a direction parallel to the side surface of the fixed mold 1, an inclined guide slot 931 is disposed on the fixing block 93, the mark printing loose core 91 is slidably connected to the second mounting slot 13 on the fixed mold 1, one end of the mark printing loose core 91 away from the rear cover 100 is slidably connected to the inclined guide slot 931, the second driving member 94 is disposed on the side surface of the fixed mold 1, and the second driving member 94 is used for driving the fixing block 93 to slide on the fixing base 92, and during demolding, the second driving member 94 drives the fixing block 93 to slide, thereby forcing the mark printing loose core 91 to slide away from the rear cover 100 through the fixing block 93. By driving the label pulling core 91 to slide in this way, the structure of the mold can be made more compact. When the rear cover 100 is removed from the fixed mold 1 due to interference of the mark position (as shown in fig. 22), the mark loose core 91 needs to be withdrawn before the movable mold 2 is opened, so that the mark loose core 91 is separated from the rear cover 100, and then the movable mold 2 is opened.

The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.

Claims (9)

1. A rear cover forming die of an automobile trunk comprises a fixed die, a movable die, a side core pulling die for forming a flange, a second demoulding assembly for forming a groove and a third demoulding assembly for forming a buckle seat; the automobile trunk rear cover forming die is characterized by further comprising a first demoulding component, a first driving piece, a second demoulding component, a first driving piece and a second demoulding component, wherein the first demoulding component is used for forming a back-off, the first demoulding component comprises a first loose core, a first core block and a first driving piece, the first loose core is slidably arranged in a first mounting groove on the movable die, one end, close to the rear cover, of the first loose core is provided with a containing groove, the first driving piece is arranged in the movable die and is used for driving the first loose core to slide in the first mounting groove, the first core block is slidably arranged in the movable die, and the sliding direction of the first core block on the movable die is perpendicular to the sliding direction of the first loose core, and the sliding direction of the first core block in the containing groove forms a V-shaped included angle with the sliding direction of the first loose core;

The side core pulling device comprises a movable die, a baffle edge, a side core pulling device, a guide block, a guide groove and a guide groove, wherein the side core pulling device is arranged on the movable die in a sliding manner, one side of the side core pulling device, which is far away from the baffle edge, is of an inclined surface structure, and the side of the side core pulling device, which is close to the first core pulling device, is provided with the guide block;

when the mold is closed, the outer end surfaces of the first loose core and the first core block are used for forming a partial area of the back surface of the back cover, and the partial area surrounds the periphery of the back buckle;

During demolding, the rear cover moves along with the movable die in a direction away from the fixed die, the first core pulling device moves relative to the movable die in a direction away from the rear cover, so that the side core pulling device is forced to move in a direction away from the flange through the guide groove and the guide block, and then the flange is demolded, the rear cover forming die of the automobile trunk further comprises a reset piece, the reset piece is arranged on the movable die, and the reset piece is used for forcing the side core pulling device to realize die assembly.

2. The automobile trunk rear cover forming die of claim 1, wherein the reset piece comprises a reset cylinder body, a driving arm and a connecting arm, the reset cylinder body is fixed to the movable die along the sliding direction of the side core pulling, the driving arm is of an I-shaped structure and is arranged at the telescopic end of the reset cylinder body, the connecting arm is fixed to the side core pulling, a U-shaped groove for sliding connection with the middle part of the driving arm is formed in the connecting arm, and when the die is closed, the distance L between one end of the driving arm, which is far away from the reset cylinder body, and the connecting arm is equal to the demolding stroke of the side core pulling.

3. The automobile trunk rear cover forming die according to claim 1, wherein the second demolding assembly comprises a second template, a second loose core, a first guide rod, a second guide rod and a mounting seat, wherein the second template is connected to the fixed die in a sliding mode along a moving direction parallel to the moving die, the first guide rod is obliquely fixed to the fixed die, the mounting seat is connected to the second template in a sliding mode along a moving direction perpendicular to the second template, the mounting seat is connected to the first guide rod in an axial direction of the first guide rod in a sliding mode, the second guide rod is connected to a first through hole which is obliquely arranged on the fixed die in an axial sliding mode, the second guide rod and the first guide rod form an X-shaped structure, one end of the second guide rod is fixed to the second loose core, and the other end of the second guide rod is connected to the mounting seat in a radial sliding mode;

And during demolding, the second template is driven to move along with the movable die in the same direction, the first guide rod forces the mounting seat to slide on the second template along the direction perpendicular to the movement direction of the second template, the mounting seat forces the second core pulling mechanism to push the rear cover out of the fixed die through the second guide rod, and the second core pulling mechanism is gradually separated from the groove in the process of pushing out the rear cover.

4. The molding die for the rear cover of the automobile trunk as claimed in claim 3, wherein the second demolding assembly further comprises a pull rod, one end of the pull rod is hinged to the second template, a hook is arranged at the other end of the pull rod, a stop block is arranged on the side face of the movable mold, the hook is hung on the stop block during demolding, and the movable mold can pull the second template to move in the same direction.

5. The molding die for the rear cover of the automobile trunk as claimed in claim 4, wherein the second demolding assembly further comprises a limiting frame and an elastic member, the limiting frame is arranged on the side face of the fixed mold, the elastic member is arranged on the limiting frame, and the elastic member is used for forcing the pull rod to rotate in a direction approaching to the stop block.

6. The molding die for the rear cover of the automobile trunk according to claim 5, wherein the second demolding assembly further comprises an ejection piece, a first inclined guide surface is arranged on one side, facing the fixed die, of the pull rod, a second inclined guide surface is arranged on the hook, an inclined guide block is arranged on the side face of the fixed die, the movable die pulls the second die plate to move synchronously when demolding is carried out until the second core is completely separated from the groove, the inclined guide block forces the pull rod to rotate in a direction away from the stop block through the first inclined guide surface, the ejection piece forces the second die plate to move reversely until the hook is separated from the stop block, and therefore the first inclined guide surface is separated from the inclined guide block, and the stop block forces the second die plate to move synchronously with the movable die through the second inclined guide surface until the second die plate moves until the second die plate contacts the fixed die plate, and the stop block is forced to move away from the stop block through the second inclined guide surface, and the stop block is forced to move towards the stop block again until the stop block contacts the pull rod and the stop piece is elastically suspended.

7. The molding die for the rear cover of the automobile trunk as set forth in claim 1, wherein the third demolding assembly comprises a third mold plate, a third loose core, a third guide rod, a fourth guide rod, a sliding seat and a sliding block, wherein the third mold plate is connected to the movable mold in a sliding manner along a direction parallel to the movement direction of the movable mold, the sliding seat is fixed to the third mold plate, the sliding block is connected to the sliding seat in a sliding manner along a direction perpendicular to the movement direction of the third mold plate, the third guide rod is obliquely fixed to the movable mold and is axially connected to the sliding block in a sliding manner, the fourth guide rod is axially connected to a second through hole in the movable mold in a sliding manner and is parallel to the third guide rod, one end of the fourth guide rod is fixed to the third loose core, and the other end of the fourth guide rod is fixed to the sliding block;

The third demolding assembly further comprises a third driving piece, the third driving piece is arranged on the movable mold and used for driving the third template to move, when demolding is carried out, the third driving piece drives the third template to move towards the direction close to the movable mold, the third template forces the third core pulling to push the rear cover out of the movable mold through the fourth guide rod, and the third core pulling is gradually separated from the buckle seat in the process of pushing out the rear cover.

8. The molding die for the rear cover of the automobile trunk according to claim 1, wherein the molding die for the rear cover of the automobile trunk further comprises a mark printing assembly used for forming marks on the front surface of the rear cover, the mark printing assembly comprises a mark printing loose core, a fixed seat, a fixed block and a second driving piece, the fixed seat is arranged on the side surface of the fixed mold, the fixed block is connected with the fixed seat in a sliding mode along the direction parallel to the side surface of the fixed mold, an inclined guide groove is formed in the fixed block, the mark printing loose core is connected with a second mounting groove on the fixed mold in a sliding mode, one end, far away from the rear cover, of the mark printing loose core is connected with the inclined guide groove in a sliding mode, the second driving piece is arranged on the side surface of the fixed mold and used for driving the fixed block to slide on the fixed seat, and when the mold is released, the second driving piece drives the fixed block to slide, so that the mark printing loose core is forced to slide in the direction far away from the rear cover through the fixed block.

9. The molding die of the rear cover of the automobile trunk as set forth in claim 1, wherein the first driving member includes a first die plate and a first cylinder, the first loose cores on the respective first stripper units are fixed to the first die plate, the first cylinder is disposed on the movable die, and the first cylinder is configured to drive the first die plate to move along a sliding direction parallel to the first loose cores.