Car trunk rear cover forming mold

Abstract

The present application discloses a rear cover forming mold for a car trunk, comprising a fixed mold, a movable mold, a side core pull, a first demoulding assembly, a second demoulding assembly and a third demoulding assembly; the first demoulding assembly comprises a first core pull, a first core block and a first driving member; the first core pull can be slidably arranged in a first mounting groove on the movable mold, and a receiving groove is arranged at one end of the first core pull close to the rear cover; the first driving member is arranged on the movable mold; the first core block can be slidably arranged on the movable mold, and the sliding direction of the first core block on the movable mold is perpendicular to the sliding direction of the first core pull; the first core block can be slidably arranged in the receiving groove, and the sliding direction of the first core block in the receiving groove forms a V-shaped angle with the sliding direction of the first core pull; when demoulding, the first driving member drives the first core pull to move in a direction away from the rear cover relative to the movable mold, so that the first core block moves in a direction away from the undercut relative to the movable mold, and then demoulds the undercut. The layout of the rear cover forming mold for a car trunk is ingenious, and demoulding is simple.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a molding mold for a rear cover of a car trunk. Background Art

[0002] At present, with the increasing competition in the automobile market, automobile manufacturers are paying more and more attention to the research and development of vehicle performance and structural strength. Figure 1 and Figure 2 The figure shows a stereoscopic view of an existing car trunk rear cover 100. In order to improve the strength, an undercut 102 is usually provided between the back side of the car trunk rear cover 100 and the retaining edge 101; in order to facilitate the buckling, a buckle seat 103 is usually required to be provided on the back side of the car trunk rear cover 100; in order to facilitate the opening of the trunk cover, a groove 104 is provided on the front side of the car trunk rear cover 100.

[0003] However, the above-mentioned automobile trunk rear cover 100 has the following defects during injection molding: (1) Due to the structural limitation of the undercut 102 and the angle between the retaining edge 101 and the rear cover 100, if a traditional demolding structure is used, it will be impossible to directly demold the undercut 102; (2) Since the number of buckle seats 103 on the rear cover is generally large, if a traditional demolding structure is used, complex demolding actions are required, the demolding efficiency is low, and it is easy to cause the structure of the mold to be not compact enough; (3) In order to improve the molding quality of the front side of the rear cover 100, the pouring port of the mold is usually set on the side close to the back side of the rear cover 100. Therefore, when the front side of the automobile rear cover 100 is close to the fixed mold side, due to the structural limitation of the groove 104, if a traditional demolding structure is used, it is necessary to set more module structures on the fixed mold, which not only increases the structural complexity of the fixed mold, but also sets too many modules, which is easy to form product defects (such as overflow, dents, joint marks, etc.) on the front side of the rear cover 100, and the molding quality is low. Summary of the invention

[0004] One purpose of the present application is to provide a car trunk rear cover forming mold with an ingenious layout, capable of achieving demoulding of undercuts, and simple demoulding.

[0005] In order to achieve the above purpose, the technical solution adopted in the present application is: a car trunk rear cover forming mold, including a fixed mold, a movable mold, a side core for forming a retaining edge, a first demolding component for forming an undercut, a second demolding component for forming a groove, and a third demolding component for forming a buckle seat; the first demolding component includes a first core, a first core block, and a first driving member; the first core can be slidably arranged in a first mounting groove on the movable mold, and an accommodating groove is provided on one end of the first core close to the rear cover; the first driving member is arranged on the movable mold, and the first driving member is used to drive the first The core puller slides in the first mounting groove; the first core block can be slidably arranged on the movable mold, and the sliding direction of the first core block on the movable mold is perpendicular to the sliding direction of the first core puller; the first core block can be slidably arranged in the accommodating groove, and the sliding direction of the first core block in the accommodating groove forms a V-shaped angle with the sliding direction of the first core puller; during demolding, the first driving member drives the first core puller to move relative to the movable mold in a direction away from the back cover, so that the first core block moves relative to the movable mold in a direction away from the undercut, so as to demold the undercut.

[0006] Preferably, the side core pull is slidably arranged on the movable mold, the side of the side core pull away from the retaining edge is a slope structure, and the side of the side core pull close to the first core pull is provided with a guide block; a yield groove is provided on the movable mold at a position corresponding to the guide block, and a guide groove is provided on the first core pull at a position corresponding to the guide block, and the guide block is slidably connected to the guide groove; during demolding, the back cover moves with the movable mold in a direction away from the fixed mold, and the first core pull moves relative to the movable mold in a direction away from the back cover, thereby forcing the side core pull to move in a direction away from the retaining edge through the guide groove and the guide block, and then demolding the retaining edge; the automobile trunk rear cover molding mold also includes a reset member, which is arranged on the movable mold, and the reset member is used to force the side core pull to achieve mold closing.

[0007] Preferably, the reset member includes a reset cylinder body, a driving arm and a connecting arm, the reset cylinder body is fixed to the movable mold along the sliding direction of the side core pulling; the driving arm is an I-shaped structure, and the driving arm is arranged at the telescopic end of the reset cylinder body; the connecting arm is fixed to the side core pulling, and the connecting arm is provided with a U-shaped groove for slidingly connecting the middle part of the driving arm; when the mold is closed, the distance L between the end of the driving arm away from the reset cylinder body and the connecting arm is equal to the demolding stroke of the side core pulling.

[0008] Preferably, the second demolding assembly comprises a second template, a second core puller, a first guide rod, a second guide rod and a mounting seat; the second template can be slidably connected to the fixed mold along a movement direction parallel to the movable mold, and the first guide rod is obliquely fixed to the fixed mold; the mounting seat can be slidably connected to the second template along a movement direction perpendicular to the second template, and the mounting seat can be slidably connected to the first guide rod along the axial direction of the first guide rod; the second guide rod is axially slidably connected to the first through hole arranged obliquely on the fixed mold, and the second guide rod and the first guide rod form an X-shaped structure with each other; one end of the second guide rod is fixed to the second core puller, and the other end of the second guide rod is radially slidably connected to the mounting seat; during demolding, the second template is driven to move in the same direction as the movable mold, the first guide rod forces the mounting seat to slide on the second template along a direction perpendicular to the movement direction of the second template, and the mounting seat forces the second core puller to eject the back cover from the fixed mold through the second guide rod, and the second core puller is gradually separated from the groove in the process of ejecting the back cover.

[0009] Preferably, the second demoulding assembly also includes a pull rod, one end of which is hinged to the second template, and the other end of the pull rod is provided with a hook; a stop block is provided on the side of the movable mold, and when demoulding, the hook is hung on the stop block, so that the movable mold can pull the second template to move in the same direction.

[0010] Preferably, the second demoulding assembly further comprises a limit frame and an elastic member, wherein the limit frame is arranged on the side of the fixed mold; the elastic member is arranged on the limit frame, and the elastic member is used to force the pull rod to rotate in a direction close to the stop block.

[0011] Preferably, the second demolding assembly also includes a spring-opening member, which is arranged on the fixed mold; a first inclined guide surface is provided on the side of the pull rod facing the fixed mold, a second inclined guide surface is provided on the hook, and an inclined guide block is provided on the side of the fixed mold; during demolding, the movable mold pulls the second template to move synchronously until the second core pulling is completely separated from the groove, and 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, and the spring-opening member forces the second template to move in the opposite direction, so that the first inclined guide surface is separated from the inclined guide block; during mold closing, 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 to contact the fixed mold, and 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 movable mold contacts the fixed mold, and the elastic member forces the pull rod to rotate in a direction close to the stop block until the hook is re-hooked on the stop block.

[0012] Preferably, the third demolding assembly includes a third template, a third core pulling, a third guide rod, a fourth guide rod, a sliding seat and a sliding block; the third template can be slidably connected to the movable mold along a movement direction parallel to the movable mold, the sliding seat is fixed to the third template, and the sliding block can be slidably connected to the sliding seat along a movement direction perpendicular to the third template; the third guide rod is tiltedly fixed to the movable mold, and the third guide rod is axially slidably connected to the sliding block; the fourth guide rod is axially slidably connected to the second through hole on the movable mold, and the fourth guide rod is parallel to the a third guide rod; one end of the fourth guide rod is fixed to the third core puller, and the other end of the fourth guide rod is fixed to the sliding block; the third demolding assembly also includes a third driving member, the third driving member is arranged on the movable mold, and the third driving member is used to drive the third template to move; during demolding, the third driving member drives the third template to move in a direction close to the movable mold, and the third template forces the third core puller to eject the back cover from the movable mold through the fourth guide rod, and the third core puller is gradually separated from the buckle seat in the process of ejecting the back cover.

[0013] Preferably, the automobile trunk rear cover forming mold also includes a printing mark component for forming a logo on the front side of the rear cover, and the printing mark component includes a printing mark core pull, a fixed seat, a fixed block and a second driving member; the fixed seat is arranged on the side of the fixed mold, and the fixed block is slidably connected to the fixed seat in a direction parallel to the side of the fixed mold, and an inclined guide groove is provided on the fixed block; the printing mark core pull can be slidably connected to the second mounting groove on the fixed mold, and the end of the printing mark core pull away from the rear cover is slidably connected to the inclined guide groove; the second driving member is arranged on the side of the fixed mold, and the second driving member is used to drive the fixed block to slide on the fixed seat; during demolding, the second driving member drives the fixed block to slide, thereby forcing the printing mark core pull to slide in the direction away from the rear cover through the fixed block.

[0014] Preferably, the first driving member includes a first template and a first cylinder; the first core pulling on each of the first demolding components is fixed to the first template, the first cylinder is arranged on the movable mold, and the first cylinder is used to drive the first template to move along a sliding direction parallel to the first core pulling.

[0015] Compared with the prior art, the beneficial effect of the present application lies in that: since the first core block can slide on the movable mold along a sliding direction perpendicular to the first core puller, and since the first core block can slide in the accommodating groove relative to the first core puller, and the sliding direction of the first core block in the accommodating groove forms a V-shaped angle with the sliding direction of the first core puller; therefore, during demolding, it is only necessary to drive the first core puller to move relative to the movable mold in a direction away from the rear cover through the first driving member, so that the first core puller is separated from the undercut; and during this movement, the first core block can only slide in a direction perpendicular to the movement direction of the first core puller, so the movable mold will limit the first core block to move in the same direction as the first core puller, that is, the first core block in The amount of movement parallel to the sliding direction of the first core pull is zero, thereby ensuring that the first core block will not move in a direction parallel to the undercut, so the undercut will not be damaged; in addition, when the movable mold restricts the first core block from moving in the same direction as the first core pull, it will cause the first core block to produce an oblique relative sliding between the first core pull in the accommodating groove (that is, the sliding direction of the first core block does not coincide with the movement direction of the first core pull), and this oblique relative sliding will force the first core block to slide adaptively on the movable mold, so that the final sliding direction of the first core block is to slide in the direction away from the undercut (that is, direction F) relative to the movable mold (or the back cover), and the direction F is perpendicular to the undercut, so that the undercut can be demoulded. From the above content, it can be seen that the layout of the automobile trunk back cover molding mold is ingenious, and the undercut can be demoulded simply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional view of the rear cover of a car trunk provided for this application.

[0017] Figure 2 Provided for this application Figure 1 Another state diagram of the rear trunk lid of the car.

[0018] Figure 3 A three-dimensional diagram of a car trunk rear cover forming mold provided in this application.

[0019] Figure 4 A stereoscopic view of a first demolding component provided in the present application.

[0020] Figure 5 Provided for this application Figure 4 Exploded view of the middle part of the structure.

[0021] Figure 6 Provided for this application Figure 4 Exploded view of the middle part of the structure.

[0022] Figure 7 A stereoscopic view of a second demolding component provided in the present application.

[0023] Figure 8 Provided for this application Figure 7 Exploded view of the second demoulding component.

[0024] Fig. 9 A stereoscopic view of a third demolding component provided in the present application.

[0025] Fig.10 Provided for this application Fig. 9 Exploded view of the third demoulding component.

[0026] Fig.11 A three-dimensional diagram of a printing mark assembly provided in this application.

[0027] Fig.12 Provided for this application Figure 3 A top view of the mold for forming the rear trunk cover of a car.

[0028] Fig.13 Provided for this application Fig.12 Cross-sectional view along AA.

[0029] Fig.14 Provided for this application Fig.13 A partial enlarged view of point I in the middle.

[0030] Fig.15 Provided for this application Fig.13 Cross-sectional view along BB.

[0031] Fig.16 Provided for this application Fig.15 A partial enlarged view of point II in the middle.

[0032] Fig.17 Provided for this application Fig.15 A partial enlarged view of point III in the middle.

[0033] Fig.18 Provided for this application Fig.15 A partial enlarged view of point IV in the middle.

[0034] Fig.19 Provided for this application Fig.15 A partial enlarged view of the V in the middle.

[0035] Fig. 20 Provided for this application Figure 3 A cross-sectional view of the rear trunk cover forming mold of the automobile along the reset piece.

[0036] Fig.21 Provided for this application Figure 3A cross-sectional view of a mold for forming a rear cover of a car trunk along the second demoulding component.

[0037] Fig. 22 Provided for this application Fig.21 A local enlarged view of the middle edge VI.

[0038] Fig.23 Provided for this application Fig.21 A partial enlarged view of the middle edge VII.

[0039] Fig.24 A cross-sectional view of one side of the movable mold along the third demolding component provided in the present application.

[0040] Fig.25 Provided for this application Fig.24 A partial enlarged view of the middle edge VIII.

[0041] Fig.26 Provided for this application Fig.24 A partial enlarged view of the middle edge IX.

[0042] In the figure: 1, fixed mold; 11, first through hole; 12, inclined guide block; 13, second mounting groove; 14, fixed mold plate; 2, movable mold; 21, first mounting groove; 22, clearance groove; 23, stop block; 24, second through hole; 25, limit groove; 3, side core pulling; 31, inclined surface structure; 32, guide block; 4, first demoulding assembly; 41, first core pulling; 411, receiving groove; 412, guide groove; 413, guide rail; 42, first core block; 421, limit block; 422, track groove; 43, first driving member; 431, first mold plate; 432, first cylinder; 5, second demoulding assembly; 51, second core pulling; 52, second mold plate; 53, first guide rod; 54, second guide rod; 5 5. Mounting seat; 56. Pull rod; 561. Hook; 562. First oblique guide surface; 563. Second oblique guide surface; 57. Limiting frame; 58. Elastic member; 6. Third demoulding assembly; 61. Third core pulling; 62. Third template; 63. Third guide rod; 64. Fourth guide rod; 65. Sliding seat; 66. Sliding block; 67. Third driving member; 8. Resetting member; 81. Resetting cylinder; 82. Driving arm; 83. Connecting arm; 831. U-shaped groove; 9. Printing mark assembly; 91. Printing mark core pulling; 92. Fixed seat; 93. Fixed block; 931. Oblique guide groove; 94. Second driving member; 100. Back cover; 101. Side rib; 102. Undercut; 103. Buckle seat; 104. Groove. DETAILED DESCRIPTION

[0043] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0044] In the description of the present application, it should be noted that for directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions and positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present application. The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The terms "including" and "having" in the specification and claims of the present application and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] Reference Figures 1 to 26 An embodiment of the present application provides a car trunk rear cover molding mold, including a fixed mold 1, a movable mold 2, a side core pulling 3 for molding a rib 101, a first demolding component 4 for molding an undercut 102, a second demolding component 5 for molding a groove 104, and a third demolding component 6 for molding a buckle seat 103.

[0046] Reference Figures 4 to 6 as well as Figures 12 to 16 In this embodiment, the first demolding assembly 4 includes a first core pull 41, a first core block 42 and a first driving member 43; the first core pull 41 can be slidably arranged in the first mounting groove 21 on the movable mold 2, and an accommodating groove 411 is provided at one end of the first core pull 41 close to the rear cover 100; the first driving member 43 is arranged on the movable mold 2, and the first driving member 43 is used to drive the first core pull 41 to slide in the first mounting groove 21; the first core block 42 can be slidably arranged 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 pull 41; the first core block 42 can be slidably arranged in the accommodating groove 411, and the sliding direction of the first core block 42 in the accommodating groove 411 forms a V-shaped angle with the sliding direction of the first core pull 41; when demolding, the first driving member 43 drives the first core pull 41 to move relative to the movable mold 2 in a direction away from the rear cover 100, so that the first core block 42 moves relative to the movable mold 2 in a direction away from the undercut 102, so as to demold the undercut 102.

[0047] The working principle of the first demoulding component 4 is as follows: Fig.14As shown, when the mold is closed, the first core puller 41 and the outer end surface of the first core block 42 (i.e. Fig.14 The left end surface in the middle) is used to form a partial area on the back of the back cover 100, which is surrounded by the outer periphery of the undercut 102; and the undercut 102 is formed between the first core pull 41 and the first core block 42, and the side of the undercut 102 that is difficult to demold faces the first core block 42. When demolding, it is only necessary to drive the first core pull 41 to move away from the back cover 100 relative to the movable mold 2 through the first driving member 43, so that the first core pull 41 is separated from the undercut 102; and during this movement, the first core block 42 can only slide in a direction perpendicular to the movement direction of the first core pull 41, so the movable mold 2 will limit the first core block 42 to move in the same direction as the first core pull 41, that is, the movement of the first core block 42 in the direction parallel to the sliding direction of the first core pull 41 is zero, thereby ensuring that the first core block 42 will not move in a direction parallel to the undercut 102, so the undercut 102 will not be damaged; in addition, the movable mold 2 When the first core block 42 is restricted from moving in the same direction as the first core puller 41, the first core block 42 will be prompted to produce an oblique relative sliding between the first core puller 41 and the first core puller 41 in the accommodating groove 411 (that is, the sliding direction of the first core block 42 does not coincide with the movement direction of the first core puller 41). This oblique relative sliding will in turn prompt the first core block 42 to slide adaptively on the movable mold 2, so that the final sliding direction of the first core block 42 is to slide in the direction away from the undercut 102 (that is, direction F) relative to the movable mold 2 (or the back cover 100), and the direction F is perpendicular to the undercut 102, so the undercut 102 can be demolded.

[0048] It should be understood that the same first core puller 41 is not limited to having only one receiving groove 411, that is, it is not limited to slidingly installing one first core block 42; when the distance between two (or more than two) adjacent undercuts 102 is close, these first core blocks 42 can be slidably installed on the same first core puller 41 at the same time, for example, Figure 5 A first core block 42 is slidably mounted on the first core puller 41. Figure 6 Two first core blocks 42 are slidably mounted on the first core pulling 41.

[0049] In addition, the present application does not limit the sliding installation method of the first core block 42 on the movable mold 2 and the sliding installation method of the first core block 42 in the receiving groove 411. Figure 5 As shown, a limit block 421 is provided on the first core block 42, a limit groove 25 is provided on the movable mold 2, and the limit block 421 is slidably connected to the limit groove 25, so that the sliding installation between the first core block 42 and the movable mold 2 can be realized. Similarly, a guide rail 413 is provided on the inner wall of the accommodating groove 411, and a track groove 422 is provided on the first core block 42, 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 groove 411 can be realized.

[0050] Reference Figure 4 , Fig.13 as well as Fig.14 In this embodiment, in order to avoid that each first core puller 41 needs to be equipped with a first driving member 43, the first driving member 43 includes a first template 431 and a first cylinder 432; the first core pullers 41 on each first demoulding assembly 4 are fixed to the first template 431, the first cylinder 432 is arranged on the movable mold 2, and the first cylinder 432 is used to drive the first template 431 to move along the sliding direction parallel to the first core puller 41. In this way, the number of first cylinders 432 can be reduced, the cost is lower, and the structure is more compact. In order to improve the movement accuracy of the first template 431, the first template 431 and the movable mold 2 can also achieve limited sliding through the sliding cooperation of the guide column and the guide column hole.

[0051] Reference Figures 4 to 6 as well as Figure 15 to Figure 16 In this embodiment, the side core pull 3 can be slidably arranged on the movable mold 2, and the side of the side core pull 3 away from the retaining edge 101 is a slope structure 31, and the side of the side core pull 3 close to the first core pull 41 is provided with a guide block 32; a position corresponding to the guide block 32 on the movable mold 2 is provided with a yield groove 22, and a position corresponding to the guide block 32 on the first core pull 41 is provided with a guide groove 412, and the guide block 32 is slidably connected to the guide groove 412; when demolding, the back cover 100 moves with the movable mold 2 in the direction away from the fixed mold 1, and the first core pull 41 moves relative to the movable mold 2 in the direction away from the back cover 100, thereby forcing the side core pull 3 to move in the direction away from the retaining edge 101 through the guide groove 412 and the guide block 32, and then demolding the retaining edge 101; the molding mold of the rear cover 100 of the automobile trunk also includes a reset member 8, which is arranged on the movable mold 2, and the reset member 8 is used to force the side core pull 3 to achieve mold closing.

[0052] The working principle of the side core pulling 3 is as follows: Fig.16As shown, since the demoulding force required between the movable mold 2 and the back of the back cover 100 is much greater than the demoulding force required between the fixed mold 1 and the front of the back cover 100, and due to the limitations of the buckle seat 103, the retaining edge 101 and other structures, the back cover 100 will move in the same direction as the movable mold 2 when the movable mold 2 is opened; therefore, during demoulding, the back cover 100 is controlled to move with the movable mold 2 in the direction away from the fixed mold 1, and the first core puller 41 is driven by the first driving member 43 to move relative to the movable mold 2 in the direction away from the back cover 100, thereby gradually demoulding the undercut 102; moreover, while the first core puller 41 is moving, the first core puller 41 will force the guide block 32 to slide relative to it through the guide groove 412, so that the side core puller 3 automatically slides relative to the movable mold 2 in the direction away from the retaining edge 101, thereby realizing the demoulding of the retaining edge 101. Since the side of the side core pull 3 away from the retaining edge 101 is a slope structure 31, when the side core pull 3 moves with the movable mold 2 in the direction away from the fixed mold 1, the distance between the slope structure 31 and the fixed mold 1 will gradually increase, thereby providing a basis for the normal demolding of the side core pull 3. In addition, the reason why this kind of cooperation between the guide groove 412 and the guide block 32 is used to drive the side core pull 3 for demolding is that, firstly, this demolding method can demold the undercut 102 and the retaining edge 101 while opening the movable mold 2, and the demolding efficiency is higher; secondly, compared with the method of driving directly through the cylinder body, this cooperation method through the guide groove 412 and the guide block 32 makes it easier to accurately control the movement speed and movement amount of the side core pull 3, thereby avoiding the side core pull 3 from hitting the fixed mold 1. The purpose of setting the reset member 8 is to enable the side core pull 3 to automatically and completely close the mold when closing the mold.

[0053] Reference Figure 3 as well as Fig. 20 In this 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 pull 3; the driving arm 82 is an I-shaped structure, and the driving arm 82 is arranged at the telescopic end of the reset cylinder 81; the connecting arm 83 is fixed to the side core pull 3, and a U-shaped groove 831 for slidingly connecting the middle part of the driving arm 82 is provided on the connecting arm 83; 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 demoulding stroke of the side core pull 3. Fig. 20As shown, since the distance L between the end of the movable arm away from the reset cylinder 81 and the connecting arm 83 during mold closing is equal to the demoulding stroke of the side core pull 3, during demoulding, the guide groove 412 on the first core pull 41 and the guide block 32 on the side core pull 3 are mutually coordinated to force the side core pull 3 to be demoulded normally, until the side core pull 3 has completely completed its demoulding stroke, and the connecting arm 83 just contacts the driving arm 82, which can not only limit the connecting arm 83 (i.e., the side core pull 3), but also only need to drive the driving arm 82 (i.e., the connecting arm 83 and the side core pull 3) to move in the opposite direction by the reset cylinder 81 for a distance of L during mold closing, so that the side core pull 3 can be completely molded. In addition, due to the existence of the distance L, the driving arm 82 will not interfere with the normal opening of the side core pull 3. The reason why the side core pull 3 is not opened directly by the reset cylinder 81 is that in the process of opening the movable mold 2, the distance between the inclined surface structure 31 on the side core pull 3 and the fixed mold 1 increases very slowly. If the side core pull 3 is opened directly by the reset cylinder 81, it is easy to cause a mold collision between the inclined surface structure 31 on the side core pull 3 and the fixed mold 1, which is uncontrollable. The reset member 8 is not limited to this structure, and can also be a nitrogen spring or an equivalent structure.

[0054] Reference Figure 7 , Figure 8 , Fig.21 as well as Fig. 22 In this embodiment, the second demolding assembly 5 includes a second template 52, a second core puller 51, a first guide rod 53, a second guide rod 54 and a mounting seat 55; the second template 52 can be slidably connected to the fixed mold 1 along a movement direction parallel to the movable mold 2, and the first guide rod 53 is obliquely fixed to the fixed mold 1; the mounting seat 55 can be slidably connected to the second template 52 along a movement direction perpendicular to the second template 52, and the mounting seat 55 can be slidably connected to the first guide rod 53 along the axial direction; the second guide rod 54 is axially slidably connected to the inclined first through hole 11 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 puller 51, and the other end of the second guide rod 54 is radially slidably connected to the mounting seat 55; when demolding, the second template 52 is driven to move in the same direction as the movable mold 2, and the first guide rod 53 forces the mounting seat 55 to slide on the second template 52 in a direction perpendicular to the movement direction of the second template 52. The mounting seat 55 forces the second core puller 51 to eject the back cover 100 from the fixed mold 1 through the second guide rod 54, and the second core puller 51 is gradually separated from the groove 104 in the process of ejecting the back cover 100.

[0055] The working principle of the second demoulding component 5 is as follows: Fig.21 and Fig. 22As shown, during demoulding, the second template 52 is controlled to move in the same direction as the movable mold 2, and the second template 52 will drive the mounting seat 55 to move together, that is, the mounting seat 55 slides along the axial direction of the guide rod, and the sliding of the mounting seat 55 can be decomposed into horizontal movement and vertical movement. The vertical movement enables the mounting seat 55 to produce adaptive relative sliding on the second template 52, and the horizontal movement produces a thrust on the second guide rod 54; the thrust can be decomposed into an axial thrust along the second guide rod 54 and a radial thrust along the second guide rod 54. The axial thrust along the second guide rod 54 acts on the rear cover 100 through the second core pulling 51, thereby separating the rear cover 100 from the fixed mold 1 and playing an ejection role (thereby eliminating the need to set an ejection mechanism on the fixed mold 1). Since the other end of the second guide rod 54 is radially slidably connected to the mounting seat 55, during the process of ejecting the back cover 100, the radial thrust along the second guide rod 54 will force the second core puller 51 to gradually translate in a direction away from the groove 104, so that the second core puller 51 is gradually separated from the groove 104 during the process of ejecting the back cover 100, until the groove 104 is demolded and the back cover 100 and the fixed mold 1 are also separated.

[0056] Reference Fig.15 as well as Fig.19 In this embodiment, the second demoulding assembly 5 further includes a tie rod 56, one end of which is hinged to the second template 52, and the other end of which is provided with a hook 561; a stop block 23 is provided on the side of the movable mold 2, and when demoulding, the hook 561 is hooked to the stop block 23, so that the movable mold 2 can pull the second template 52 to move in the same direction. Thus, when demoulding, the linkage between the movable mold 2 and the second template 52 is realized, so that the second core pull 51 and the groove 104, as well as the front of the rear cover 100 and the fixed mold 1 can be separated more accurately and reliably.

[0057] Reference Fig.15 as well as Fig.18 In this embodiment, the second demoulding assembly 5 further includes a limit frame 57 and an elastic member 58. The limit frame 57 is arranged on the side of the fixed mold 1; the elastic member 58 is arranged on the limit frame 57, and the elastic member 58 is used to force the pull rod 56 to rotate in the direction close to the stop block 23. The elastic member 58 can apply a force to the pull rod 56, thereby preventing the hook 561 from accidentally separating from the stop block 23, and the stability is higher.

[0058] Reference Fig.15 as well as Figures 17 to 19In this embodiment, the second demoulding assembly 5 further includes a spring-opening member, which is disposed on the fixed mold 1. A first inclined guide surface 562 is disposed on the side of the pull rod 56 facing the fixed mold 1, a second inclined guide surface 563 is disposed on the hook 561, and an inclined guide block 12 is disposed on the side of the fixed mold 1; during demoulding, the movable mold 2 pulls the second mold plate 52 to move synchronously until the second core pull 51 is completely separated from the groove 104, and 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, and the spring-opening member forces the second mold plate 52 to rotate in a direction away from the stop block 23. When the mold is closed, the stop block 23 forces the second mold plate 52 to move synchronously with the movable mold 2 through the second inclined guide surface 563, until the second mold plate 52 moves to contact the fixed mold plate 14, the stop block 23 forces the pull rod 56 to rotate away from the stop block 23 through the second inclined guide surface 563, until the movable mold 2 contacts the fixed mold 1, the elastic member 58 forces the pull rod 56 to rotate in the direction close to the stop block 23, until the hook 561 is re-hook on the stop block 23. The pop-up member itself is a prior art, such as a nitrogen spring.

[0059] It is understandable that if Fig.15 as well as Figures 17 to 19 As shown, during the demoulding process, after the hook 561 is separated from the stop block 23, the spring-opening member forces the second template 52 to move in the opposite direction for 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 pull rod 56 to rotate again in the direction close to the stop block 23, that is, the pull rod 56 is close to the outer side surface of the fixed mold 1; when the mold is closed, the stop block 23 will move from the right side of the hook 561 to the left, that is, the stop block 23 will generate a force on the second inclined guide surface 563, and the force can be decomposed into an axial force along the pull rod 56 and a radial force along the pull rod 56. The force required to force the second template 52 to slide should be smaller than the force required to force the pull rod 56 to rotate. Therefore, the axial force of the pull rod 56 will first push the pull rod 56, so that the second template 52 is reset first, until the second template 52 contacts the fixed template 14, that is, the second template 52 can no longer be pushed to move by the pull rod 56. At this time, the radial force along the pull rod 56 forces the pull rod 56 to rotate, so that the stop block 23 moves from the right side of the hook 561 to the left side, and then under the action of the elastic member 58, the hook 561 is re-hooked on the stop block 23.

[0060] Reference Fig. 9 , Fig.10 as well as Figure 24 to Figure 26In this embodiment, the third demolding assembly 6 includes a third template 62, a third core pull 61, a third guide rod 63, a fourth guide rod 64, a sliding seat 65 and a sliding block 66; the third template 62 can be slidably connected to the movable mold 2 along a movement direction parallel to the movable mold 2, the sliding seat 65 is fixed to the third template 62, and the sliding block 66 can be slidably connected to the sliding seat 65 along a movement direction perpendicular to the third template 62; the third guide rod 63 is tilted and 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 pull 61, and the other end of the fourth guide rod 64 is fixed to the sliding block 66; the third demolding assembly 6 also includes a third driving member 67 (such as a hydraulic or pneumatic cylinder), the third driving member 67 is arranged on the movable mold 2, and the third driving member 67 is used to drive the third template 62 to move; during demolding, the third driving member 67 drives the third template 62 to move in the direction close to the movable mold 2, and the third template 62 forces the third core pull 61 to eject the rear cover 100 from the movable mold 2 through the fourth guide rod 64, and the third core pull 61 gradually separates from the buckle seat 103 in the process of ejecting the rear cover 100. It should be noted that, if Fig. 22 As shown, the position corresponding to the groove 104 on the back side of the rear cover 100 is actually equivalent to a snap seat 103, so the third demoulding component 6 can also be used for demoulding.

[0061] The working principle of the third demoulding component 6 is as follows: Fig.24 As shown, during demoulding, the third template 62 first moves synchronously with the movable mold 2. After the rear cover 100 is completely separated from one side of the fixed mold 1, and the undercut 102 and the retaining edge 101 are demoulded by the first demoulding component 4 and the side core pull 3, the third template 62 is driven by the third driving member 67 to move in the direction close to the movable mold 2 (i.e., the rear cover 100). At this time, the sliding seat 65 on the third template 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. Fig.25 and Fig.26As shown in the figure, the fourth guide rod 64 generates a thrust on the third core pull 61, and the thrust can be decomposed into a thrust perpendicular to the rear cover 100 and a thrust parallel to the rear cover 100. The thrust perpendicular to the rear cover 100 pushes the rear cover 100 off the movable mold 2, playing the role of an ejection mechanism; the thrust parallel to the rear cover 100 causes the third core pull 61 to gradually separate from the buckle seat 103, thereby completing the demoulding of the buckle seat 103 while ejecting the rear cover 100. In addition, since the sliding block 66 can be slidably connected to the sliding seat 65 along a moving direction perpendicular to the third template 62, the sliding block 66 will slide adaptively on the sliding seat 65 while the fourth guide rod 64 slides in the second through hole 24. Since the third guide rod 63 can also play a guiding and limiting role in the sliding of the sliding block 66 during the movement, the sliding accuracy of the sliding block 66 can be improved.

[0062] Reference Fig.11 as well as Figure 21 to Figure 23 In this embodiment, the molding die of the rear cover 100 of the automobile trunk further includes a printing mark assembly 9 for forming a mark on the front of the rear cover 100, and the printing mark assembly 9 includes a printing mark core 91, a fixing seat 92, a fixing block 93 and a second driving member 94 (for example, a hydraulic or pneumatic cylinder); the fixing seat 92 is arranged on the side of the fixed mold 1, and the fixing block 93 is slidably connected to the fixing seat 92 in a direction parallel to the side of the fixed mold 1, and an oblique guide groove 931 is provided on the fixing block 93; the printing mark core 91 can be slidably connected to the second mounting groove 13 on the fixed mold 1, and one end of the printing mark core 91 away from the rear cover 100 is slidably connected to the oblique guide groove 931; the second driving member 94 is arranged on the side of the fixed mold 1, and the second driving member 94 is used to drive the fixing block 93 to slide on the fixing seat 92; when demolding, the second driving member 94 drives the fixing block 93 to slide, thereby forcing the printing mark core 91 to slide in a direction away from the rear cover 100 through the fixing block 93. By driving the printed mark core puller 91 to slide in this way, the structure of the mold can be made more compact. It should be noted that when the printed mark position interferes with the removal of the rear cover 100 from the fixed mold 1 (such as Fig. 22 As shown in the figure, it is necessary to pull out the printed mark core puller 91 before the movable mold 2 is opened, so that the printed mark core puller 91 is separated from the rear cover 100 before the movable mold 2 is opened.

[0063] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A mold for forming a rear cover of a car trunk, comprising a fixed mold, a movable mold, a side core for forming a rib, a second demoulding component for forming a groove, and a third demoulding component for forming a buckle seat; characterized in that: The automobile trunk rear cover forming mold further comprises a first demoulding component for forming an undercut, the first demoulding component comprising a first core pull, a first core block and a first driving member; the first core pull can be slidably arranged in a first mounting groove on the movable mold, and an accommodating groove is arranged at one end of the first core pull close to the rear cover; the first driving member is arranged on the movable mold, and the first driving member is used to drive the first core pull to slide in the first mounting groove; the first core block can be slidably arranged on the movable mold, and the sliding direction of the first core block on the movable mold is perpendicular to the sliding direction of the first core pull; the first core block can be slidably arranged in the accommodating groove, and the sliding direction of the first core block in the accommodating groove forms a V-shaped angle with the sliding direction of the first core pull; during demoulding, the first driving member drives the first core pull to move relative to the movable mold in a direction away from the rear cover, thereby causing the first core block to move relative to the movable mold in a direction away from the undercut, so as to demould the undercut; The side core pull can be slidably arranged on the movable mold, the side of the side core pull away from the retaining edge is an inclined surface structure, and the side of the side core pull close to the first core pull is provided with a guide block; a position corresponding to the guide block on the movable mold is provided with a yield groove, and a position corresponding to the guide block on the first core pull is provided with a guide groove, and the guide block is slidably connected to the guide groove; When the mold is closed, the first core pulling and the outer end surface of the first core block are used to form a partial area of ​​the back side of the rear cover, and the partial area surrounds the outer periphery of the undercut; and forming the undercut between the first core puller and the first core block, with the side of the undercut that is difficult to demould facing the first core block; During demolding, the rear cover moves with the movable mold in a direction away from the fixed mold, and the first core pull moves relative to the movable mold in a direction away from the rear cover, thereby forcing the side core pull to move in a direction away from the rib through the guide groove and the guide block, thereby demolding the rib; the automobile trunk rear cover molding mold also includes a reset member, which is arranged on the movable mold, and is used to force the side core pull to achieve mold closing.

2. The automobile trunk rear cover forming mold according to claim 1, characterized in that: The reset member includes a reset cylinder body, a driving arm and a connecting arm, the reset cylinder body is fixed to the movable mold along the sliding direction of the side core pulling; the driving arm is an I-shaped structure, and the driving arm is arranged at the telescopic end of the reset cylinder body; the connecting arm is fixed to the side core pulling, and the connecting arm is provided with a U-shaped groove for slidingly connecting the middle part of the driving arm; when the mold is closed, the distance L between the end of the driving arm 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 mold according to claim 1, characterized in that: The second demoulding assembly comprises a second template, a second core puller, a first guide rod, a second guide rod and a mounting seat; the second template is slidably connected to the fixed mold along a movement direction parallel to the movable mold, and the first guide rod is obliquely fixed to the fixed mold; the mounting seat is slidably connected to the second template along a movement direction perpendicular to the second template, and the mounting seat is slidably connected to the first guide rod along the axial direction of the first guide rod; the second guide rod is axially slidably connected to the first obliquely arranged through hole on the fixed mold, and the second guide rod and the first guide rod form an X-shaped structure with each other; one end of the second guide rod is fixed to the second core puller, and the other end of the second guide rod is radially slidably connected to the mounting seat; During demolding, the second template is driven to move in the same direction as the movable mold, and the first guide rod forces the mounting seat to slide on the second template in a direction perpendicular to the movement direction of the second template. The mounting seat forces the second core puller to eject the back cover from the fixed mold through the second guide rod, and the second core puller is gradually separated from the groove in the process of ejecting the back cover.

4. The automobile trunk rear cover forming mold according to claim 3, characterized in that: The second demoulding assembly also includes a pull rod, one end of which is hinged to the second template, and the other end of which is provided with a hook; a stop block is provided on the side of the movable mold, and when demoulding, the hook is hung on the stop block, so that the movable mold can pull the second template to move in the same direction.

5. The automobile trunk rear cover forming mold according to claim 4, characterized in that: The second demoulding assembly further comprises a limit frame and an elastic member, wherein the limit frame is arranged on the side of the fixed mold; the elastic member is arranged on the limit frame, and the elastic member is used to force the pull rod to rotate in a direction close to the stop block.

6. The automobile trunk rear cover forming mold according to claim 5, characterized in that: The second demolding assembly also includes a spring-opening member, which is arranged on the fixed mold; a first inclined guide surface is provided on the side of the pull rod facing the fixed mold, a second inclined guide surface is provided on the hook, and an inclined guide block is provided on the side of the fixed mold; during demolding, the movable mold pulls the second template to move synchronously until the second core pulling is completely separated from the groove, and 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, and the spring-opening member forces the second template to move in the opposite direction, so that the first inclined guide surface is separated from the inclined guide block; during mold closing, 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 to contact the fixed mold, and 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 movable mold contacts the fixed mold, and the elastic member forces the pull rod to rotate in a direction close to the stop block until the hook is re-hooked on the stop block.

7. The automobile trunk rear cover forming mold according to claim 1, characterized in that: The third demoulding assembly comprises a third template, a third core puller, a third guide rod, a fourth guide rod, a sliding seat and a sliding block; the third template is slidably connected to the movable mold along a movement direction parallel to the movable mold, the sliding seat is fixed to the third template, and the sliding block is slidably connected to the sliding seat along a movement direction perpendicular to the third template; the third guide rod is obliquely fixed to the movable mold, and the third guide rod is axially slidably connected to the sliding block; the fourth guide rod is axially slidably connected to the second through hole on the movable mold, and the fourth guide rod is parallel to the third guide rod; one end of the fourth guide rod is fixed to the third core puller, and the other end of the fourth guide rod is fixed to the sliding block; The third demolding assembly also includes a third driving member, which is arranged on the movable mold and is used to drive the third template to move; during demolding, the third driving member drives the third template to move in a direction close to the movable mold, and the third template forces the third core puller to eject the back cover from the movable mold through the fourth guide rod, and the third core puller is gradually separated from the buckle seat in the process of ejecting the back cover.

8. The automobile trunk rear cover forming mold according to claim 1, characterized in that: The automobile trunk rear cover forming mold also includes a printing mark component for forming a logo on the front of the rear cover, and the printing mark component includes a printing mark core pull, a fixed seat, a fixed block and a second driving member; the fixed seat is arranged on the side of the fixed mold, and the fixed block is slidably connected to the fixed seat in a direction parallel to the side of the fixed mold, and an inclined guide groove is provided on the fixed block; the printing mark core pull can be slidably connected to the second mounting groove on the fixed mold, and the end of the printing mark core pull away from the rear cover is slidably connected to the inclined guide groove; the second driving member is arranged on the side of the fixed mold, and the second driving member is used to drive the fixed block to slide on the fixed seat; when demolding, the second driving member drives the fixed block to slide, thereby forcing the printing mark core pull to slide in the direction away from the rear cover through the fixed block.

9. The automobile trunk rear cover forming mold according to claim 1, characterized in that: The first driving member includes a first template and a first cylinder; the first core pullers on each of the first demolding assemblies are fixed to the first template, the first cylinder is disposed on the movable mold, and the first cylinder is used to drive the first template to move along a sliding direction parallel to the first core puller.

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